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_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 149 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 150 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 151 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 152 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 153 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 154 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 155 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 156 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 157 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 158 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 159 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 160 161 // enumerate supported commands 162 #define X(name, offset, bit) name, 163 enum { 164 SUPPORTED_HCI_COMMANDS 165 SUPPORTED_HCI_COMMANDS_COUNT 166 }; 167 #undef X 168 169 // assert supported hci commands bitmap fits into provided storage 170 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 171 #error "Storage for supported HCI commands too small" 172 #endif 173 174 // prototypes 175 #ifdef ENABLE_CLASSIC 176 static void hci_update_scan_enable(void); 177 static void hci_emit_discoverable_enabled(uint8_t enabled); 178 static int hci_local_ssp_activated(void); 179 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 180 static bool hci_ssp_supported(hci_connection_t * connection); 181 static void hci_notify_if_sco_can_send_now(void); 182 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 183 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 184 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 185 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 186 static void hci_connection_timestamp(hci_connection_t *connection); 187 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 188 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 189 #endif 190 191 static int hci_power_control_on(void); 192 static void hci_power_control_off(void); 193 static void hci_state_reset(void); 194 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 195 static void hci_emit_transport_packet_sent(void); 196 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 197 static void hci_emit_nr_connections_changed(void); 198 static void hci_emit_hci_open_failed(void); 199 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 200 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 201 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 202 static void hci_run(void); 203 static int hci_is_le_connection(hci_connection_t * connection); 204 205 #ifdef ENABLE_CLASSIC 206 static int hci_have_usb_transport(void); 207 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 208 #endif 209 210 #ifdef ENABLE_BLE 211 #ifdef ENABLE_LE_CENTRAL 212 // called from test/ble_client/advertising_data_parser.c 213 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 214 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 215 static void hci_whitelist_free(void); 216 static hci_connection_t * gap_get_outgoing_connection(void); 217 static void hci_le_scan_stop(void); 218 static bool hci_run_general_gap_le(void); 219 #endif 220 #ifdef ENABLE_LE_PERIPHERAL 221 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 222 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 223 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 224 #endif /* ENABLE_LE_PERIPHERAL */ 225 #endif /* ENABLE_BLE */ 226 227 // the STACK is here 228 #ifndef HAVE_MALLOC 229 static hci_stack_t hci_stack_static; 230 #endif 231 static hci_stack_t * hci_stack = NULL; 232 233 #ifdef ENABLE_CLASSIC 234 // default name 235 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 236 237 // test helper 238 static uint8_t disable_l2cap_timeouts = 0; 239 #endif 240 241 // reset connection state on create and on reconnect 242 // don't overwrite addr, con handle, role 243 static void hci_connection_init(hci_connection_t * conn){ 244 conn->authentication_flags = AUTH_FLAG_NONE; 245 conn->bonding_flags = 0; 246 conn->requested_security_level = LEVEL_0; 247 #ifdef ENABLE_CLASSIC 248 conn->request_role = HCI_ROLE_INVALID; 249 conn->sniff_subrating_max_latency = 0xffff; 250 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 251 conn->link_key_type = INVALID_LINK_KEY; 252 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 253 btstack_run_loop_set_timer_context(&conn->timeout, conn); 254 hci_connection_timestamp(conn); 255 #endif 256 conn->acl_recombination_length = 0; 257 conn->acl_recombination_pos = 0; 258 conn->num_packets_sent = 0; 259 260 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 261 #ifdef ENABLE_BLE 262 conn->le_phy_update_all_phys = 0xff; 263 #endif 264 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 265 conn->le_max_tx_octets = 27; 266 #endif 267 #ifdef ENABLE_CLASSIC_PAIRING_OOB 268 conn->classic_oob_c_192 = NULL; 269 conn->classic_oob_r_192 = NULL; 270 conn->classic_oob_c_256 = NULL; 271 conn->classic_oob_r_256 = NULL; 272 #endif 273 } 274 275 /** 276 * create connection for given address 277 * 278 * @return connection OR NULL, if no memory left 279 */ 280 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 281 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 282 283 hci_connection_t * conn = btstack_memory_hci_connection_get(); 284 if (!conn) return NULL; 285 hci_connection_init(conn); 286 287 bd_addr_copy(conn->address, addr); 288 conn->address_type = addr_type; 289 conn->con_handle = HCI_CON_HANDLE_INVALID; 290 conn->role = HCI_ROLE_INVALID; 291 292 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 293 294 return conn; 295 } 296 297 298 /** 299 * get le connection parameter range 300 * 301 * @return le connection parameter range struct 302 */ 303 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 304 *range = hci_stack->le_connection_parameter_range; 305 } 306 307 /** 308 * set le connection parameter range 309 * 310 */ 311 312 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 313 hci_stack->le_connection_parameter_range = *range; 314 } 315 316 /** 317 * @brief Test if connection parameters are inside in existing rage 318 * @param conn_interval_min (unit: 1.25ms) 319 * @param conn_interval_max (unit: 1.25ms) 320 * @param conn_latency 321 * @param supervision_timeout (unit: 10ms) 322 * @return 1 if included 323 */ 324 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){ 325 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 326 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 327 328 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 329 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 330 331 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 332 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 333 334 return 1; 335 } 336 337 /** 338 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 339 * @note: default: 1 340 * @param max_peripheral_connections 341 */ 342 #ifdef ENABLE_LE_PERIPHERAL 343 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 344 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 345 } 346 #endif 347 348 /** 349 * get hci connections iterator 350 * 351 * @return hci connections iterator 352 */ 353 354 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 355 btstack_linked_list_iterator_init(it, &hci_stack->connections); 356 } 357 358 /** 359 * get connection for a given handle 360 * 361 * @return connection OR NULL, if not found 362 */ 363 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 364 btstack_linked_list_iterator_t it; 365 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 366 while (btstack_linked_list_iterator_has_next(&it)){ 367 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 368 if ( item->con_handle == con_handle ) { 369 return item; 370 } 371 } 372 return NULL; 373 } 374 375 /** 376 * get connection for given address 377 * 378 * @return connection OR NULL, if not found 379 */ 380 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 381 btstack_linked_list_iterator_t it; 382 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 383 while (btstack_linked_list_iterator_has_next(&it)){ 384 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 385 if (connection->address_type != addr_type) continue; 386 if (memcmp(addr, connection->address, 6) != 0) continue; 387 return connection; 388 } 389 return NULL; 390 } 391 392 #ifdef ENABLE_CLASSIC 393 394 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 395 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 396 } 397 398 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 399 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 400 } 401 402 #ifdef ENABLE_SCO_OVER_HCI 403 static int hci_number_sco_connections(void){ 404 int connections = 0; 405 btstack_linked_list_iterator_t it; 406 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 407 while (btstack_linked_list_iterator_has_next(&it)){ 408 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 409 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 410 connections++; 411 } 412 return connections; 413 } 414 #endif 415 416 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 417 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 418 #ifdef HAVE_EMBEDDED_TICK 419 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 420 // connections might be timed out 421 hci_emit_l2cap_check_timeout(connection); 422 } 423 #else 424 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 425 // connections might be timed out 426 hci_emit_l2cap_check_timeout(connection); 427 } 428 #endif 429 } 430 431 static void hci_connection_timestamp(hci_connection_t *connection){ 432 #ifdef HAVE_EMBEDDED_TICK 433 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 434 #else 435 connection->timestamp = btstack_run_loop_get_time_ms(); 436 #endif 437 } 438 439 /** 440 * add authentication flags and reset timer 441 * @note: assumes classic connection 442 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 443 */ 444 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 445 bd_addr_t addr; 446 reverse_bd_addr(bd_addr, addr); 447 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 448 if (conn) { 449 connectionSetAuthenticationFlags(conn, flags); 450 hci_connection_timestamp(conn); 451 } 452 } 453 454 static bool hci_pairing_active(hci_connection_t * hci_connection){ 455 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 456 } 457 458 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 459 if (hci_pairing_active(hci_connection)) return; 460 if (ssp){ 461 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 462 } else { 463 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 464 } 465 // if we are initiator, we have sent an HCI Authenticate Request 466 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 467 468 // if we are responder, use minimal service security level as required level 469 if (!initiator){ 470 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); 471 } 472 473 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 474 475 uint8_t event[12]; 476 event[0] = GAP_EVENT_PAIRING_STARTED; 477 event[1] = 10; 478 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 479 reverse_bd_addr(hci_connection->address, &event[4]); 480 event[10] = (uint8_t) ssp; 481 event[11] = (uint8_t) initiator; 482 hci_emit_event(event, sizeof(event), 1); 483 } 484 485 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 486 hci_connection->requested_security_level = LEVEL_0; 487 if (!hci_pairing_active(hci_connection)) return; 488 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 489 #ifdef ENABLE_CLASSIC_PAIRING_OOB 490 hci_connection->classic_oob_c_192 = NULL; 491 hci_connection->classic_oob_r_192 = NULL; 492 hci_connection->classic_oob_c_256 = NULL; 493 hci_connection->classic_oob_r_256 = NULL; 494 #endif 495 log_info("pairing complete, status %02x", status); 496 497 uint8_t event[11]; 498 event[0] = GAP_EVENT_PAIRING_COMPLETE; 499 event[1] = 9; 500 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 501 reverse_bd_addr(hci_connection->address, &event[4]); 502 event[10] = status; 503 hci_emit_event(event, sizeof(event), 1); 504 } 505 506 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 507 hci_connection_t * conn = hci_connection_for_handle(handle); 508 if (!conn) return false; 509 return hci_pairing_active(conn); 510 } 511 512 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 513 if (!hci_stack->link_key_db) return; 514 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 515 hci_stack->link_key_db->delete_link_key(addr); 516 } 517 518 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 519 if (!hci_stack->link_key_db) return; 520 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 521 hci_stack->link_key_db->put_link_key(addr, link_key, type); 522 } 523 524 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 525 if (!hci_stack->link_key_db) return false; 526 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 527 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 528 return result; 529 } 530 531 void gap_delete_all_link_keys(void){ 532 bd_addr_t addr; 533 link_key_t link_key; 534 link_key_type_t type; 535 btstack_link_key_iterator_t it; 536 int ok = gap_link_key_iterator_init(&it); 537 if (!ok) { 538 log_error("could not initialize iterator"); 539 return; 540 } 541 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 542 gap_drop_link_key_for_bd_addr(addr); 543 } 544 gap_link_key_iterator_done(&it); 545 } 546 547 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 548 if (!hci_stack->link_key_db) return 0; 549 if (!hci_stack->link_key_db->iterator_init) return 0; 550 return hci_stack->link_key_db->iterator_init(it); 551 } 552 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){ 553 if (!hci_stack->link_key_db) return 0; 554 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 555 } 556 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 557 if (!hci_stack->link_key_db) return; 558 hci_stack->link_key_db->iterator_done(it); 559 } 560 #endif 561 562 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 563 switch (address_type){ 564 case BD_ADDR_TYPE_LE_PUBLIC: 565 case BD_ADDR_TYPE_LE_RANDOM: 566 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 567 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 568 return true; 569 default: 570 return false; 571 } 572 } 573 574 static int hci_is_le_connection(hci_connection_t * connection){ 575 return hci_is_le_connection_type(connection->address_type); 576 } 577 578 /** 579 * count connections 580 */ 581 static int nr_hci_connections(void){ 582 int count = 0; 583 btstack_linked_item_t *it; 584 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 585 count++; 586 } 587 return count; 588 } 589 590 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 591 592 unsigned int num_packets_sent_classic = 0; 593 unsigned int num_packets_sent_le = 0; 594 595 btstack_linked_item_t *it; 596 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 597 hci_connection_t * connection = (hci_connection_t *) it; 598 if (hci_is_le_connection(connection)){ 599 num_packets_sent_le += connection->num_packets_sent; 600 } 601 if (connection->address_type == BD_ADDR_TYPE_ACL){ 602 num_packets_sent_classic += connection->num_packets_sent; 603 } 604 } 605 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 606 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 607 int free_slots_le = 0; 608 609 if (free_slots_classic < 0){ 610 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); 611 return 0; 612 } 613 614 if (hci_stack->le_acl_packets_total_num){ 615 // if we have LE slots, they are used 616 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 617 if (free_slots_le < 0){ 618 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); 619 return 0; 620 } 621 } else { 622 // otherwise, classic slots are used for LE, too 623 free_slots_classic -= num_packets_sent_le; 624 if (free_slots_classic < 0){ 625 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); 626 return 0; 627 } 628 } 629 630 switch (address_type){ 631 case BD_ADDR_TYPE_UNKNOWN: 632 log_error("hci_number_free_acl_slots: unknown address type"); 633 return 0; 634 635 case BD_ADDR_TYPE_ACL: 636 return (uint16_t) free_slots_classic; 637 638 default: 639 if (hci_stack->le_acl_packets_total_num > 0){ 640 return (uint16_t) free_slots_le; 641 } 642 return (uint16_t) free_slots_classic; 643 } 644 } 645 646 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 647 // get connection type 648 hci_connection_t * connection = hci_connection_for_handle(con_handle); 649 if (!connection){ 650 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 651 return 0; 652 } 653 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 654 } 655 656 #ifdef ENABLE_CLASSIC 657 static int hci_number_free_sco_slots(void){ 658 unsigned int num_sco_packets_sent = 0; 659 btstack_linked_item_t *it; 660 if (hci_stack->synchronous_flow_control_enabled){ 661 // explicit flow control 662 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 663 hci_connection_t * connection = (hci_connection_t *) it; 664 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 665 num_sco_packets_sent += connection->num_packets_sent; 666 } 667 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 668 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 669 return 0; 670 } 671 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 672 } else { 673 // implicit flow control -- TODO 674 int num_ready = 0; 675 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 676 hci_connection_t * connection = (hci_connection_t *) it; 677 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 678 if (connection->sco_tx_ready == 0) continue; 679 num_ready++; 680 } 681 return num_ready; 682 } 683 } 684 #endif 685 686 // only used to send HCI Host Number Completed Packets 687 static int hci_can_send_comand_packet_transport(void){ 688 if (hci_stack->hci_packet_buffer_reserved) return 0; 689 690 // check for async hci transport implementations 691 if (hci_stack->hci_transport->can_send_packet_now){ 692 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 693 return 0; 694 } 695 } 696 return 1; 697 } 698 699 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 700 bool hci_can_send_command_packet_now(void){ 701 if (hci_can_send_comand_packet_transport() == 0) return false; 702 return hci_stack->num_cmd_packets > 0u; 703 } 704 705 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 706 // check for async hci transport implementations 707 if (!hci_stack->hci_transport->can_send_packet_now) return true; 708 return hci_stack->hci_transport->can_send_packet_now(packet_type); 709 } 710 711 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 712 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 713 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 714 } 715 716 bool hci_can_send_acl_le_packet_now(void){ 717 if (hci_stack->hci_packet_buffer_reserved) return false; 718 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 719 } 720 721 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 722 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 723 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 724 } 725 726 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 727 if (hci_stack->hci_packet_buffer_reserved) return false; 728 return hci_can_send_prepared_acl_packet_now(con_handle); 729 } 730 731 #ifdef ENABLE_CLASSIC 732 bool hci_can_send_acl_classic_packet_now(void){ 733 if (hci_stack->hci_packet_buffer_reserved) return false; 734 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 735 } 736 737 bool hci_can_send_prepared_sco_packet_now(void){ 738 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 739 if (hci_have_usb_transport()){ 740 return hci_stack->sco_can_send_now; 741 } else { 742 return hci_number_free_sco_slots() > 0; 743 } 744 } 745 746 bool hci_can_send_sco_packet_now(void){ 747 if (hci_stack->hci_packet_buffer_reserved) return false; 748 return hci_can_send_prepared_sco_packet_now(); 749 } 750 751 void hci_request_sco_can_send_now_event(void){ 752 hci_stack->sco_waiting_for_can_send_now = 1; 753 hci_notify_if_sco_can_send_now(); 754 } 755 #endif 756 757 // used for internal checks in l2cap.c 758 bool hci_is_packet_buffer_reserved(void){ 759 return hci_stack->hci_packet_buffer_reserved; 760 } 761 762 // reserves outgoing packet buffer. 763 // @return 1 if successful 764 bool hci_reserve_packet_buffer(void){ 765 if (hci_stack->hci_packet_buffer_reserved) { 766 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 767 return false; 768 } 769 hci_stack->hci_packet_buffer_reserved = true; 770 return true; 771 } 772 773 void hci_release_packet_buffer(void){ 774 hci_stack->hci_packet_buffer_reserved = false; 775 } 776 777 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 778 static int hci_transport_synchronous(void){ 779 return hci_stack->hci_transport->can_send_packet_now == NULL; 780 } 781 782 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 783 784 // 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); 785 786 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 787 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 788 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 789 max_acl_data_packet_length = hci_stack->le_data_packets_length; 790 } 791 792 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 793 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 794 max_acl_data_packet_length = connection->le_max_tx_octets; 795 } 796 #endif 797 798 log_debug("hci_send_acl_packet_fragments entered"); 799 800 uint8_t status = ERROR_CODE_SUCCESS; 801 // multiple packets could be send on a synchronous HCI transport 802 while (true){ 803 804 log_debug("hci_send_acl_packet_fragments loop entered"); 805 806 // get current data 807 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 808 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 809 bool more_fragments = false; 810 811 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 812 if (current_acl_data_packet_length > max_acl_data_packet_length){ 813 more_fragments = true; 814 current_acl_data_packet_length = max_acl_data_packet_length; 815 } 816 817 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 818 if (acl_header_pos > 0u){ 819 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 820 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 821 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 822 } 823 824 // update header len 825 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 826 827 // count packet 828 connection->num_packets_sent++; 829 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 830 831 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 832 if (more_fragments){ 833 // update start of next fragment to send 834 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 835 } else { 836 // done 837 hci_stack->acl_fragmentation_pos = 0; 838 hci_stack->acl_fragmentation_total_size = 0; 839 } 840 841 // send packet 842 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 843 const int size = current_acl_data_packet_length + 4; 844 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 845 hci_stack->acl_fragmentation_tx_active = 1; 846 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 847 if (err != 0){ 848 // no error from HCI Transport expected 849 status = ERROR_CODE_HARDWARE_FAILURE; 850 } 851 852 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 853 854 // done yet? 855 if (!more_fragments) break; 856 857 // can send more? 858 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 859 } 860 861 log_debug("hci_send_acl_packet_fragments loop over"); 862 863 // release buffer now for synchronous transport 864 if (hci_transport_synchronous()){ 865 hci_stack->acl_fragmentation_tx_active = 0; 866 hci_release_packet_buffer(); 867 hci_emit_transport_packet_sent(); 868 } 869 870 return status; 871 } 872 873 // pre: caller has reserved the packet buffer 874 uint8_t hci_send_acl_packet_buffer(int size){ 875 btstack_assert(hci_stack->hci_packet_buffer_reserved); 876 877 uint8_t * packet = hci_stack->hci_packet_buffer; 878 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 879 880 // check for free places on Bluetooth module 881 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 882 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return BTSTACK_ACL_BUFFERS_FULL; 886 } 887 888 hci_connection_t *connection = hci_connection_for_handle( con_handle); 889 if (!connection) { 890 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 891 hci_release_packet_buffer(); 892 hci_emit_transport_packet_sent(); 893 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 894 } 895 896 #ifdef ENABLE_CLASSIC 897 hci_connection_timestamp(connection); 898 #endif 899 900 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 901 902 // setup data 903 hci_stack->acl_fragmentation_total_size = size; 904 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 905 906 return hci_send_acl_packet_fragments(connection); 907 } 908 909 #ifdef ENABLE_CLASSIC 910 // pre: caller has reserved the packet buffer 911 uint8_t hci_send_sco_packet_buffer(int size){ 912 btstack_assert(hci_stack->hci_packet_buffer_reserved); 913 914 uint8_t * packet = hci_stack->hci_packet_buffer; 915 916 // skip checks in loopback mode 917 if (!hci_stack->loopback_mode){ 918 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 919 920 // check for free places on Bluetooth module 921 if (!hci_can_send_prepared_sco_packet_now()) { 922 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 923 hci_release_packet_buffer(); 924 hci_emit_transport_packet_sent(); 925 return BTSTACK_ACL_BUFFERS_FULL; 926 } 927 928 // track send packet in connection struct 929 hci_connection_t *connection = hci_connection_for_handle( con_handle); 930 if (!connection) { 931 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 932 hci_release_packet_buffer(); 933 hci_emit_transport_packet_sent(); 934 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 935 } 936 937 if (hci_have_usb_transport()){ 938 // token used 939 hci_stack->sco_can_send_now = false; 940 } else { 941 if (hci_stack->synchronous_flow_control_enabled){ 942 connection->num_packets_sent++; 943 } else { 944 connection->sco_tx_ready--; 945 } 946 } 947 } 948 949 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 950 951 #ifdef HAVE_SCO_TRANSPORT 952 hci_stack->sco_transport->send_packet(packet, size); 953 hci_release_packet_buffer(); 954 hci_emit_transport_packet_sent(); 955 956 return 0; 957 #else 958 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 959 if (hci_transport_synchronous()){ 960 hci_release_packet_buffer(); 961 hci_emit_transport_packet_sent(); 962 } 963 964 if (err != 0){ 965 return ERROR_CODE_HARDWARE_FAILURE; 966 } 967 return ERROR_CODE_SUCCESS; 968 #endif 969 } 970 #endif 971 972 static void acl_handler(uint8_t *packet, uint16_t size){ 973 974 // get info 975 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 976 hci_connection_t *conn = hci_connection_for_handle(con_handle); 977 uint8_t acl_flags = READ_ACL_FLAGS(packet); 978 uint16_t acl_length = READ_ACL_LENGTH(packet); 979 980 // ignore non-registered handle 981 if (!conn){ 982 log_error("acl_handler called with non-registered handle %u!" , con_handle); 983 return; 984 } 985 986 // assert packet is complete 987 if ((acl_length + 4u) != size){ 988 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 989 return; 990 } 991 992 #ifdef ENABLE_CLASSIC 993 // update idle timestamp 994 hci_connection_timestamp(conn); 995 #endif 996 997 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 998 hci_stack->host_completed_packets = 1; 999 conn->num_packets_completed++; 1000 #endif 1001 1002 // handle different packet types 1003 switch (acl_flags & 0x03u) { 1004 1005 case 0x01: // continuation fragment 1006 1007 // sanity checks 1008 if (conn->acl_recombination_pos == 0u) { 1009 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1010 return; 1011 } 1012 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1013 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1014 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1015 conn->acl_recombination_pos = 0; 1016 return; 1017 } 1018 1019 // append fragment payload (header already stored) 1020 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1021 &packet[4], acl_length); 1022 conn->acl_recombination_pos += acl_length; 1023 1024 // forward complete L2CAP packet if complete. 1025 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1026 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1027 // reset recombination buffer 1028 conn->acl_recombination_length = 0; 1029 conn->acl_recombination_pos = 0; 1030 } 1031 break; 1032 1033 case 0x02: { // first fragment 1034 1035 // sanity check 1036 if (conn->acl_recombination_pos) { 1037 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1038 conn->acl_recombination_pos = 0; 1039 } 1040 1041 // peek into L2CAP packet! 1042 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1043 1044 // compare fragment size to L2CAP packet size 1045 if (acl_length >= (l2cap_length + 4u)){ 1046 // forward fragment as L2CAP packet 1047 hci_emit_acl_packet(packet, acl_length + 4u); 1048 } else { 1049 1050 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1051 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1052 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1053 return; 1054 } 1055 1056 // store first fragment and tweak acl length for complete package 1057 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1058 packet, acl_length + 4u); 1059 conn->acl_recombination_pos = acl_length + 4u; 1060 conn->acl_recombination_length = l2cap_length; 1061 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1062 } 1063 break; 1064 1065 } 1066 default: 1067 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1068 return; 1069 } 1070 1071 // execute main loop 1072 hci_run(); 1073 } 1074 1075 static void hci_connection_stop_timer(hci_connection_t * conn){ 1076 btstack_run_loop_remove_timer(&conn->timeout); 1077 #ifdef ENABLE_CLASSIC 1078 btstack_run_loop_remove_timer(&conn->timeout_sco); 1079 #endif 1080 } 1081 1082 static void hci_shutdown_connection(hci_connection_t *conn){ 1083 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1084 1085 #ifdef ENABLE_CLASSIC 1086 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1087 bd_addr_type_t addr_type = conn->address_type; 1088 #endif 1089 #ifdef HAVE_SCO_TRANSPORT 1090 hci_con_handle_t con_handle = conn->con_handle; 1091 #endif 1092 #endif 1093 1094 hci_connection_stop_timer(conn); 1095 1096 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1097 btstack_memory_hci_connection_free( conn ); 1098 1099 // now it's gone 1100 hci_emit_nr_connections_changed(); 1101 1102 #ifdef ENABLE_CLASSIC 1103 #ifdef ENABLE_SCO_OVER_HCI 1104 // update SCO 1105 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1106 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1107 } 1108 #endif 1109 #ifdef HAVE_SCO_TRANSPORT 1110 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1111 hci_stack->sco_transport->close(con_handle); 1112 } 1113 #endif 1114 #endif 1115 } 1116 1117 #ifdef ENABLE_CLASSIC 1118 1119 static const uint16_t packet_type_sizes[] = { 1120 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1121 HCI_ACL_DH1_SIZE, 0, 0, 0, 1122 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1123 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1124 }; 1125 static const uint8_t packet_type_feature_requirement_bit[] = { 1126 0, // 3 slot packets 1127 1, // 5 slot packets 1128 25, // EDR 2 mpbs 1129 26, // EDR 3 mbps 1130 39, // 3 slot EDR packts 1131 40, // 5 slot EDR packet 1132 }; 1133 static const uint16_t packet_type_feature_packet_mask[] = { 1134 0x0f00, // 3 slot packets 1135 0xf000, // 5 slot packets 1136 0x1102, // EDR 2 mpbs 1137 0x2204, // EDR 3 mbps 1138 0x0300, // 3 slot EDR packts 1139 0x3000, // 5 slot EDR packet 1140 }; 1141 1142 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1143 // enable packet types based on size 1144 uint16_t packet_types = 0; 1145 unsigned int i; 1146 for (i=0;i<16;i++){ 1147 if (packet_type_sizes[i] == 0) continue; 1148 if (packet_type_sizes[i] <= buffer_size){ 1149 packet_types |= 1 << i; 1150 } 1151 } 1152 // disable packet types due to missing local supported features 1153 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1154 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1155 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1156 if (feature_set) continue; 1157 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1158 packet_types &= ~packet_type_feature_packet_mask[i]; 1159 } 1160 // flip bits for "may not be used" 1161 packet_types ^= 0x3306; 1162 return packet_types; 1163 } 1164 1165 uint16_t hci_usable_acl_packet_types(void){ 1166 return hci_stack->packet_types; 1167 } 1168 #endif 1169 1170 uint8_t* hci_get_outgoing_packet_buffer(void){ 1171 // hci packet buffer is >= acl data packet length 1172 return hci_stack->hci_packet_buffer; 1173 } 1174 1175 uint16_t hci_max_acl_data_packet_length(void){ 1176 return hci_stack->acl_data_packet_length; 1177 } 1178 1179 #ifdef ENABLE_CLASSIC 1180 bool hci_extended_sco_link_supported(void){ 1181 // No. 31, byte 3, bit 7 1182 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1183 } 1184 #endif 1185 1186 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1187 // No. 54, byte 6, bit 6 1188 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1189 } 1190 1191 #ifdef ENABLE_CLASSIC 1192 static int gap_ssp_supported(void){ 1193 // No. 51, byte 6, bit 3 1194 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1195 } 1196 #endif 1197 1198 static int hci_classic_supported(void){ 1199 #ifdef ENABLE_CLASSIC 1200 // No. 37, byte 4, bit 5, = No BR/EDR Support 1201 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1202 #else 1203 return 0; 1204 #endif 1205 } 1206 1207 static int hci_le_supported(void){ 1208 #ifdef ENABLE_BLE 1209 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1210 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1211 #else 1212 return 0; 1213 #endif 1214 } 1215 1216 static bool hci_command_supported(uint8_t command_index){ 1217 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1218 } 1219 1220 #ifdef ENABLE_BLE 1221 1222 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1223 static bool hci_extended_advertising_supported(void){ 1224 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1225 } 1226 #endif 1227 1228 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1229 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1230 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1231 } else { 1232 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1233 } 1234 } 1235 1236 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1237 *addr_type = hci_stack->le_own_addr_type; 1238 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1239 } 1240 1241 #ifdef ENABLE_LE_PERIPHERAL 1242 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1243 *addr_type = hci_stack->le_advertisements_own_addr_type; 1244 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1245 }; 1246 #endif 1247 1248 #ifdef ENABLE_LE_CENTRAL 1249 1250 /** 1251 * @brief Get own addr type and address used for LE connections (Central) 1252 */ 1253 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1254 *addr_type = hci_stack->le_connection_own_addr_type; 1255 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1256 } 1257 1258 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1259 1260 uint16_t offset = 3; 1261 uint8_t num_reports = packet[offset]; 1262 offset += 1; 1263 1264 uint16_t i; 1265 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1266 for (i=0; (i<num_reports) && (offset < size);i++){ 1267 // sanity checks on data_length: 1268 uint8_t data_length = packet[offset + 8]; 1269 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1270 if ((offset + 9u + data_length + 1u) > size) return; 1271 // setup event 1272 uint8_t event_size = 10u + data_length; 1273 uint16_t pos = 0; 1274 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1275 event[pos++] = event_size; 1276 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1277 offset += 8; 1278 pos += 8; 1279 event[pos++] = packet[offset + 1 + data_length]; // rssi 1280 event[pos++] = data_length; 1281 offset++; 1282 (void)memcpy(&event[pos], &packet[offset], data_length); 1283 pos += data_length; 1284 offset += data_length + 1u; // rssi 1285 hci_emit_event(event, pos, 1); 1286 } 1287 } 1288 1289 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1290 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1291 uint16_t offset = 3; 1292 uint8_t num_reports = packet[offset++]; 1293 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1294 uint8_t i; 1295 for (i=0; (i<num_reports) && (offset < size);i++){ 1296 // sanity checks on data_length: 1297 uint16_t data_length = packet[offset + 23]; 1298 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1299 if ((offset + 24u + data_length) > size) return; 1300 uint16_t event_type = little_endian_read_16(packet, offset); 1301 offset += 2; 1302 if ((event_type & 0x10) != 0) { 1303 // setup legacy event 1304 uint8_t legacy_event_type; 1305 switch (event_type){ 1306 case 0b0010011: 1307 // ADV_IND 1308 legacy_event_type = 0; 1309 break; 1310 case 0b0010101: 1311 // ADV_DIRECT_IND 1312 legacy_event_type = 1; 1313 break; 1314 case 0b0010010: 1315 // ADV_SCAN_IND 1316 legacy_event_type = 2; 1317 break; 1318 case 0b0010000: 1319 // ADV_NONCONN_IND 1320 legacy_event_type = 3; 1321 break; 1322 case 0b0011011: 1323 case 0b0011010: 1324 // SCAN_RSP 1325 legacy_event_type = 4; 1326 break; 1327 default: 1328 legacy_event_type = 0; 1329 break; 1330 } 1331 uint16_t pos = 0; 1332 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1333 event[pos++] = 10u + data_length; 1334 event[pos++] = legacy_event_type; 1335 // copy address type + address 1336 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1337 offset += 7; 1338 pos += 7; 1339 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1340 offset += 4; 1341 // copy rssi 1342 event[pos++] = packet[offset++]; 1343 // skip periodic advertising interval and direct address 1344 offset += 9; 1345 // copy data len + data; 1346 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1347 pos += 1 +data_length; 1348 offset += 1+ data_length; 1349 hci_emit_event(event, pos, 1); 1350 } else { 1351 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1352 uint8_t report_len = 24 + data_length; 1353 event[1] = report_len; 1354 little_endian_store_16(event, 2, event_type); 1355 memcpy(&event[4], &packet[offset], report_len); 1356 offset += report_len; 1357 hci_emit_event(event, 2 + report_len, 1); 1358 } 1359 } 1360 } 1361 #endif 1362 1363 #endif 1364 #endif 1365 1366 #ifdef ENABLE_BLE 1367 #ifdef ENABLE_LE_PERIPHERAL 1368 static void hci_update_advertisements_enabled_for_current_roles(void){ 1369 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1370 // get number of active le slave connections 1371 int num_slave_connections = 0; 1372 btstack_linked_list_iterator_t it; 1373 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1374 while (btstack_linked_list_iterator_has_next(&it)){ 1375 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1376 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1377 if (con->state != OPEN) continue; 1378 if (con->role != HCI_ROLE_SLAVE) continue; 1379 if (!hci_is_le_connection(con)) continue; 1380 num_slave_connections++; 1381 } 1382 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1383 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1384 } else { 1385 hci_stack->le_advertisements_enabled_for_current_roles = false; 1386 } 1387 } 1388 #endif 1389 #endif 1390 1391 #ifdef ENABLE_CLASSIC 1392 static void gap_run_set_local_name(void){ 1393 hci_reserve_packet_buffer(); 1394 uint8_t * packet = hci_stack->hci_packet_buffer; 1395 // construct HCI Command and send 1396 uint16_t opcode = hci_write_local_name.opcode; 1397 hci_stack->last_cmd_opcode = opcode; 1398 packet[0] = opcode & 0xff; 1399 packet[1] = opcode >> 8; 1400 packet[2] = DEVICE_NAME_LEN; 1401 memset(&packet[3], 0, DEVICE_NAME_LEN); 1402 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1403 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1404 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1405 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1406 // expand '00:00:00:00:00:00' in name with bd_addr 1407 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1408 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1409 } 1410 1411 static void gap_run_set_eir_data(void){ 1412 hci_reserve_packet_buffer(); 1413 uint8_t * packet = hci_stack->hci_packet_buffer; 1414 // construct HCI Command in-place and send 1415 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1416 hci_stack->last_cmd_opcode = opcode; 1417 uint16_t offset = 0; 1418 packet[offset++] = opcode & 0xff; 1419 packet[offset++] = opcode >> 8; 1420 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1421 packet[offset++] = 0; // FEC not required 1422 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1423 if (hci_stack->eir_data){ 1424 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1425 ad_context_t context; 1426 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1427 uint8_t data_type = ad_iterator_get_data_type(&context); 1428 uint8_t size = ad_iterator_get_data_len(&context); 1429 const uint8_t *data = ad_iterator_get_data(&context); 1430 // copy item 1431 packet[offset++] = size + 1; 1432 packet[offset++] = data_type; 1433 memcpy(&packet[offset], data, size); 1434 // update name item 1435 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1436 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1437 } 1438 offset += size; 1439 } 1440 } else { 1441 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1442 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1443 packet[offset++] = bytes_to_copy + 1; 1444 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1445 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1446 // expand '00:00:00:00:00:00' in name with bd_addr 1447 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1448 } 1449 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1450 } 1451 1452 static void hci_run_gap_tasks_classic(void){ 1453 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1454 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1455 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1456 return; 1457 } 1458 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1459 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1460 gap_run_set_local_name(); 1461 return; 1462 } 1463 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1464 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1465 gap_run_set_eir_data(); 1466 return; 1467 } 1468 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1469 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1470 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1471 return; 1472 } 1473 // write page scan activity 1474 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1475 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1476 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1477 return; 1478 } 1479 // write page scan type 1480 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1481 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1482 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1483 return; 1484 } 1485 // write page timeout 1486 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1487 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1488 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1489 return; 1490 } 1491 // send scan enable 1492 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1493 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1494 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1495 return; 1496 } 1497 // send write scan activity 1498 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1499 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1500 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1501 return; 1502 } 1503 } 1504 #endif 1505 1506 #ifndef HAVE_HOST_CONTROLLER_API 1507 1508 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1509 if (!hci_stack->config) return 0; 1510 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1511 // Limit baud rate for Broadcom chipsets to 3 mbps 1512 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1513 baud_rate = 3000000; 1514 } 1515 return baud_rate; 1516 } 1517 1518 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1519 UNUSED(ds); 1520 1521 switch (hci_stack->substate){ 1522 case HCI_INIT_W4_SEND_RESET: 1523 log_info("Resend HCI Reset"); 1524 hci_stack->substate = HCI_INIT_SEND_RESET; 1525 hci_stack->num_cmd_packets = 1; 1526 hci_run(); 1527 break; 1528 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1529 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1530 if (hci_stack->hci_transport->reset_link){ 1531 hci_stack->hci_transport->reset_link(); 1532 } 1533 1534 /* fall through */ 1535 1536 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1537 log_info("Resend HCI Reset - CSR Warm Boot"); 1538 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1539 hci_stack->num_cmd_packets = 1; 1540 hci_run(); 1541 break; 1542 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1543 if (hci_stack->hci_transport->set_baudrate){ 1544 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1545 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1546 hci_stack->hci_transport->set_baudrate(baud_rate); 1547 } 1548 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1549 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1550 if (hci_stack->hci_transport->reset_link){ 1551 log_info("Link Reset"); 1552 hci_stack->hci_transport->reset_link(); 1553 } 1554 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1555 hci_run(); 1556 } 1557 break; 1558 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1559 // otherwise continue 1560 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1561 hci_send_cmd(&hci_read_local_supported_commands); 1562 break; 1563 default: 1564 break; 1565 } 1566 } 1567 #endif 1568 1569 static void hci_initializing_next_state(void){ 1570 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1571 } 1572 1573 static void hci_init_done(void){ 1574 // done. tell the app 1575 log_info("hci_init_done -> HCI_STATE_WORKING"); 1576 hci_stack->state = HCI_STATE_WORKING; 1577 hci_emit_state(); 1578 } 1579 1580 // assumption: hci_can_send_command_packet_now() == true 1581 static void hci_initializing_run(void){ 1582 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1583 1584 if (!hci_can_send_command_packet_now()) return; 1585 1586 #ifndef HAVE_HOST_CONTROLLER_API 1587 bool need_baud_change = hci_stack->config 1588 && hci_stack->chipset 1589 && hci_stack->chipset->set_baudrate_command 1590 && hci_stack->hci_transport->set_baudrate 1591 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1592 #endif 1593 1594 switch (hci_stack->substate){ 1595 case HCI_INIT_SEND_RESET: 1596 hci_state_reset(); 1597 1598 #ifndef HAVE_HOST_CONTROLLER_API 1599 // prepare reset if command complete not received in 100ms 1600 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1601 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1602 btstack_run_loop_add_timer(&hci_stack->timeout); 1603 #endif 1604 // send command 1605 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1606 hci_send_cmd(&hci_reset); 1607 break; 1608 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1609 hci_send_cmd(&hci_read_local_version_information); 1610 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1611 break; 1612 1613 #ifndef HAVE_HOST_CONTROLLER_API 1614 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1615 hci_state_reset(); 1616 // prepare reset if command complete not received in 100ms 1617 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1618 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1619 btstack_run_loop_add_timer(&hci_stack->timeout); 1620 // send command 1621 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1622 hci_send_cmd(&hci_reset); 1623 break; 1624 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1625 hci_state_reset(); 1626 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1627 hci_send_cmd(&hci_reset); 1628 break; 1629 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1630 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1631 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1632 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1633 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1634 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1635 break; 1636 } 1637 case HCI_INIT_SET_BD_ADDR: 1638 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1639 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1640 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1641 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1642 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1643 break; 1644 case HCI_INIT_SEND_READ_LOCAL_NAME: 1645 #ifdef ENABLE_CLASSIC 1646 hci_send_cmd(&hci_read_local_name); 1647 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1648 break; 1649 #endif 1650 /* fall through */ 1651 1652 case HCI_INIT_SEND_BAUD_CHANGE: 1653 if (need_baud_change) { 1654 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1655 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1656 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1657 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1658 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1659 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1660 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1661 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1662 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1663 btstack_run_loop_add_timer(&hci_stack->timeout); 1664 } 1665 break; 1666 } 1667 1668 /* fall through */ 1669 1670 case HCI_INIT_CUSTOM_INIT: 1671 // Custom initialization 1672 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1673 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1674 bool send_cmd = false; 1675 switch (hci_stack->chipset_result){ 1676 case BTSTACK_CHIPSET_VALID_COMMAND: 1677 send_cmd = true; 1678 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1679 break; 1680 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1681 send_cmd = true; 1682 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1683 log_info("CSR Warm Boot"); 1684 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1685 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1686 btstack_run_loop_add_timer(&hci_stack->timeout); 1687 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1688 && hci_stack->config 1689 && hci_stack->chipset 1690 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1691 && hci_stack->hci_transport->set_baudrate 1692 && hci_transport_uart_get_main_baud_rate()){ 1693 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1694 } else { 1695 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1696 } 1697 break; 1698 default: 1699 break; 1700 } 1701 1702 if (send_cmd){ 1703 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1704 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1705 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1706 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1707 break; 1708 } 1709 log_info("Init script done"); 1710 1711 // Init script download on Broadcom chipsets causes: 1712 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1713 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1714 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1715 1716 // - baud rate to reset, restore UART baud rate if needed 1717 if (need_baud_change) { 1718 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1719 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1720 hci_stack->hci_transport->set_baudrate(baud_rate); 1721 } 1722 1723 uint16_t bcm_delay_ms = 300; 1724 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1725 // -> Work around: wait here. 1726 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1727 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1728 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1729 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1730 btstack_run_loop_add_timer(&hci_stack->timeout); 1731 break; 1732 } 1733 } 1734 #endif 1735 /* fall through */ 1736 1737 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1738 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1739 hci_send_cmd(&hci_read_local_supported_commands); 1740 break; 1741 case HCI_INIT_READ_BD_ADDR: 1742 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1743 hci_send_cmd(&hci_read_bd_addr); 1744 break; 1745 case HCI_INIT_READ_BUFFER_SIZE: 1746 // only read buffer size if supported 1747 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1748 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1749 hci_send_cmd(&hci_read_buffer_size); 1750 break; 1751 } 1752 1753 /* fall through */ 1754 1755 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1756 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1757 hci_send_cmd(&hci_read_local_supported_features); 1758 break; 1759 1760 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1761 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1762 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1763 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1764 break; 1765 case HCI_INIT_HOST_BUFFER_SIZE: 1766 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1767 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1768 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1769 break; 1770 #endif 1771 1772 case HCI_INIT_SET_EVENT_MASK: 1773 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1774 if (hci_le_supported()){ 1775 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1776 } else { 1777 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1778 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1779 } 1780 break; 1781 1782 case HCI_INIT_SET_EVENT_MASK_2: 1783 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2)){ 1784 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1785 // Encryption Change Event v2 - bit 25 1786 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1787 break; 1788 } 1789 1790 #ifdef ENABLE_CLASSIC 1791 /* fall through */ 1792 1793 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1794 if (hci_classic_supported() && gap_ssp_supported()){ 1795 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1796 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1797 break; 1798 } 1799 1800 /* fall through */ 1801 1802 case HCI_INIT_WRITE_INQUIRY_MODE: 1803 if (hci_classic_supported()){ 1804 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1805 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1806 break; 1807 } 1808 1809 /* fall through */ 1810 1811 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1812 // skip write secure connections host support if not supported or disabled 1813 if (hci_classic_supported() && hci_stack->secure_connections_enable 1814 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1815 hci_stack->secure_connections_active = true; 1816 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1817 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1818 break; 1819 } 1820 1821 /* fall through */ 1822 1823 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1824 // skip set min encryption key size 1825 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1826 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1827 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1828 break; 1829 } 1830 1831 #ifdef ENABLE_SCO_OVER_HCI 1832 /* fall through */ 1833 1834 // only sent if ENABLE_SCO_OVER_HCI is defined 1835 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1836 // skip write synchronous flow control if not supported 1837 if (hci_classic_supported() 1838 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1839 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1840 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1841 break; 1842 } 1843 /* fall through */ 1844 1845 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1846 // skip write default erroneous data reporting if not supported 1847 if (hci_classic_supported() 1848 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1849 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1850 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1851 break; 1852 } 1853 #endif 1854 1855 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1856 /* fall through */ 1857 1858 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1859 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1860 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1861 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1862 #ifdef ENABLE_SCO_OVER_HCI 1863 log_info("BCM: Route SCO data via HCI transport"); 1864 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1865 #endif 1866 #ifdef ENABLE_SCO_OVER_PCM 1867 log_info("BCM: Route SCO data via PCM interface"); 1868 #ifdef ENABLE_BCM_PCM_WBS 1869 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1870 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1871 #else 1872 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1873 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1874 #endif 1875 #endif 1876 break; 1877 } 1878 #endif 1879 1880 #ifdef ENABLE_SCO_OVER_PCM 1881 /* fall through */ 1882 1883 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1884 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1885 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1886 log_info("BCM: Config PCM interface for I2S"); 1887 #ifdef ENABLE_BCM_PCM_WBS 1888 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1889 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1890 #else 1891 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1892 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1893 #endif 1894 break; 1895 } 1896 #endif 1897 #endif 1898 1899 #ifdef ENABLE_BLE 1900 /* fall through */ 1901 1902 // LE INIT 1903 case HCI_INIT_LE_READ_BUFFER_SIZE: 1904 if (hci_le_supported()){ 1905 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1906 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 1907 hci_send_cmd(&hci_le_read_buffer_size_v2); 1908 } else { 1909 hci_send_cmd(&hci_le_read_buffer_size); 1910 } 1911 break; 1912 } 1913 1914 /* fall through */ 1915 1916 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1917 // skip write le host if not supported (e.g. on LE only EM9301) 1918 if (hci_le_supported() 1919 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1920 // LE Supported Host = 1, Simultaneous Host = 0 1921 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1922 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1923 break; 1924 } 1925 1926 /* fall through */ 1927 1928 case HCI_INIT_LE_SET_EVENT_MASK: 1929 if (hci_le_supported()){ 1930 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1931 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1932 break; 1933 } 1934 #endif 1935 1936 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1937 /* fall through */ 1938 1939 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1940 if (hci_le_supported() 1941 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1942 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1943 hci_send_cmd(&hci_le_read_maximum_data_length); 1944 break; 1945 } 1946 1947 /* fall through */ 1948 1949 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1950 if (hci_le_supported() 1951 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1952 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1953 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1954 break; 1955 } 1956 #endif 1957 1958 #ifdef ENABLE_LE_CENTRAL 1959 /* fall through */ 1960 1961 case HCI_INIT_READ_WHITE_LIST_SIZE: 1962 if (hci_le_supported()){ 1963 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1964 hci_send_cmd(&hci_le_read_white_list_size); 1965 break; 1966 } 1967 1968 #endif 1969 1970 #ifdef ENABLE_LE_PERIPHERAL 1971 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1972 /* fall through */ 1973 1974 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1975 if (hci_extended_advertising_supported()){ 1976 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1977 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1978 break; 1979 } 1980 #endif 1981 #endif 1982 /* fall through */ 1983 1984 case HCI_INIT_DONE: 1985 hci_stack->substate = HCI_INIT_DONE; 1986 // main init sequence complete 1987 #ifdef ENABLE_CLASSIC 1988 // check if initial Classic GAP Tasks are completed 1989 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1990 hci_run_gap_tasks_classic(); 1991 break; 1992 } 1993 #endif 1994 #ifdef ENABLE_BLE 1995 #ifdef ENABLE_LE_CENTRAL 1996 // check if initial LE GAP Tasks are completed 1997 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1998 hci_run_general_gap_le(); 1999 break; 2000 } 2001 #endif 2002 #endif 2003 hci_init_done(); 2004 break; 2005 2006 default: 2007 return; 2008 } 2009 } 2010 2011 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2012 bool command_completed = false; 2013 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2014 uint16_t opcode = little_endian_read_16(packet,3); 2015 if (opcode == hci_stack->last_cmd_opcode){ 2016 command_completed = true; 2017 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2018 } else { 2019 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2020 } 2021 } 2022 2023 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2024 uint8_t status = packet[2]; 2025 uint16_t opcode = little_endian_read_16(packet,4); 2026 if (opcode == hci_stack->last_cmd_opcode){ 2027 if (status){ 2028 command_completed = true; 2029 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2030 } else { 2031 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2032 } 2033 } else { 2034 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2035 } 2036 } 2037 #ifndef HAVE_HOST_CONTROLLER_API 2038 // Vendor == CSR 2039 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2040 // TODO: track actual command 2041 command_completed = true; 2042 } 2043 2044 // Vendor == Toshiba 2045 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2046 // TODO: track actual command 2047 command_completed = true; 2048 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2049 hci_stack->num_cmd_packets = 1; 2050 } 2051 #endif 2052 2053 return command_completed; 2054 } 2055 2056 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2057 2058 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2059 2060 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2061 2062 #ifndef HAVE_HOST_CONTROLLER_API 2063 2064 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2065 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2066 // 2067 // HCI Reset 2068 // Timeout 100 ms 2069 // HCI Reset 2070 // Command Complete Reset 2071 // HCI Read Local Version Information 2072 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2073 // hang... 2074 // 2075 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2076 if (!command_completed 2077 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2078 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2079 2080 uint16_t opcode = little_endian_read_16(packet,3); 2081 if (opcode == hci_reset.opcode){ 2082 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2083 return; 2084 } 2085 } 2086 2087 // CSR & H5 2088 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2089 if (!command_completed 2090 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2091 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2092 2093 uint16_t opcode = little_endian_read_16(packet,3); 2094 if (opcode == hci_reset.opcode){ 2095 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2096 return; 2097 } 2098 } 2099 2100 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2101 // fix: Correct substate and behave as command below 2102 if (command_completed){ 2103 switch (hci_stack->substate){ 2104 case HCI_INIT_SEND_RESET: 2105 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2106 break; 2107 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2108 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2109 break; 2110 default: 2111 break; 2112 } 2113 } 2114 2115 #endif 2116 2117 if (!command_completed) return; 2118 2119 bool need_baud_change = false; 2120 bool need_addr_change = false; 2121 2122 #ifndef HAVE_HOST_CONTROLLER_API 2123 need_baud_change = hci_stack->config 2124 && hci_stack->chipset 2125 && hci_stack->chipset->set_baudrate_command 2126 && hci_stack->hci_transport->set_baudrate 2127 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2128 2129 need_addr_change = hci_stack->custom_bd_addr_set 2130 && hci_stack->chipset 2131 && hci_stack->chipset->set_bd_addr_command; 2132 #endif 2133 2134 switch(hci_stack->substate){ 2135 2136 #ifndef HAVE_HOST_CONTROLLER_API 2137 case HCI_INIT_SEND_RESET: 2138 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2139 // fix: just correct substate and behave as command below 2140 2141 /* fall through */ 2142 #endif 2143 2144 case HCI_INIT_W4_SEND_RESET: 2145 btstack_run_loop_remove_timer(&hci_stack->timeout); 2146 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2147 return; 2148 2149 #ifndef HAVE_HOST_CONTROLLER_API 2150 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2151 // for STLC2500D, baud rate change already happened. 2152 // for others, baud rate gets changed now 2153 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2154 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2155 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2156 hci_stack->hci_transport->set_baudrate(baud_rate); 2157 } 2158 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2159 return; 2160 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2161 btstack_run_loop_remove_timer(&hci_stack->timeout); 2162 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2163 return; 2164 case HCI_INIT_W4_CUSTOM_INIT: 2165 // repeat custom init 2166 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2167 return; 2168 #endif 2169 2170 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2171 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2172 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2173 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2174 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2175 return; 2176 } 2177 if (need_addr_change){ 2178 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2179 return; 2180 } 2181 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2182 return; 2183 #ifndef HAVE_HOST_CONTROLLER_API 2184 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2185 if (need_baud_change){ 2186 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2187 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2188 hci_stack->hci_transport->set_baudrate(baud_rate); 2189 } 2190 if (need_addr_change){ 2191 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2192 return; 2193 } 2194 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2195 return; 2196 case HCI_INIT_W4_SET_BD_ADDR: 2197 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2198 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2199 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2200 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2201 return; 2202 } 2203 // skipping st warm boot 2204 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2205 return; 2206 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2207 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2208 return; 2209 #endif 2210 2211 case HCI_INIT_DONE: 2212 // set state if we came here by fall through 2213 hci_stack->substate = HCI_INIT_DONE; 2214 return; 2215 2216 default: 2217 break; 2218 } 2219 hci_initializing_next_state(); 2220 } 2221 2222 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2223 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2224 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2225 // check if we have been aware of the HCI connection 2226 switch (conn->state){ 2227 case SENT_CREATE_CONNECTION: 2228 case RECEIVED_CONNECTION_REQUEST: 2229 break; 2230 default: 2231 return; 2232 } 2233 2234 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2235 bd_addr_t bd_address; 2236 (void)memcpy(&bd_address, conn->address, 6); 2237 2238 #ifdef ENABLE_CLASSIC 2239 // cache needed data 2240 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2241 #endif 2242 2243 // connection failed, remove entry 2244 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2245 btstack_memory_hci_connection_free( conn ); 2246 2247 #ifdef ENABLE_CLASSIC 2248 // notify client if dedicated bonding 2249 if (notify_dedicated_bonding_failed){ 2250 log_info("hci notify_dedicated_bonding_failed"); 2251 hci_emit_dedicated_bonding_result(bd_address, status); 2252 } 2253 2254 // if authentication error, also delete link key 2255 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2256 gap_drop_link_key_for_bd_addr(bd_address); 2257 } 2258 #else 2259 UNUSED(status); 2260 #endif 2261 } 2262 2263 #ifdef ENABLE_CLASSIC 2264 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2265 // SSP Controller 2266 if (features[6] & (1 << 3)){ 2267 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2268 } 2269 // eSCO 2270 if (features[3] & (1<<7)){ 2271 conn->remote_supported_features[0] |= 1; 2272 } 2273 // Extended features 2274 if (features[7] & (1<<7)){ 2275 conn->remote_supported_features[0] |= 2; 2276 } 2277 } 2278 2279 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2280 // SSP Host 2281 if (features[0] & (1 << 0)){ 2282 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2283 } 2284 // SC Host 2285 if (features[0] & (1 << 3)){ 2286 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2287 } 2288 } 2289 2290 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2291 // SC Controller 2292 if (features[1] & (1 << 0)){ 2293 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2294 } 2295 } 2296 2297 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2298 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2299 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2300 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2301 if (conn->bonding_flags & BONDING_DEDICATED){ 2302 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2303 } 2304 } 2305 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2306 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2307 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2308 } 2309 2310 #endif 2311 2312 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2313 // handle BT initialization 2314 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2315 hci_initializing_event_handler(packet, size); 2316 } 2317 2318 // help with BT sleep 2319 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2320 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2321 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2322 hci_initializing_next_state(); 2323 } 2324 } 2325 2326 #ifdef ENABLE_CLASSIC 2327 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2328 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2329 conn->encryption_key_size = encryption_key_size; 2330 2331 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2332 conn->requested_security_level = LEVEL_0; 2333 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2334 return; 2335 } 2336 2337 // Request remote features if not already done 2338 hci_trigger_remote_features_for_connection(conn); 2339 2340 // Request Authentication if not already done 2341 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2342 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2343 } 2344 #endif 2345 2346 static void hci_store_local_supported_commands(const uint8_t * packet){ 2347 // create mapping table 2348 #define X(name, offset, bit) { offset, bit }, 2349 static struct { 2350 uint8_t byte_offset; 2351 uint8_t bit_position; 2352 } supported_hci_commands_map [] = { 2353 SUPPORTED_HCI_COMMANDS 2354 }; 2355 #undef X 2356 2357 // create names for debug purposes 2358 #ifdef ENABLE_LOG_DEBUG 2359 #define X(name, offset, bit) #name, 2360 static const char * command_names[] = { 2361 SUPPORTED_HCI_COMMANDS 2362 }; 2363 #undef X 2364 #endif 2365 2366 hci_stack->local_supported_commands = 0; 2367 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2368 uint16_t i; 2369 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2370 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2371 #ifdef ENABLE_LOG_DEBUG 2372 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); 2373 #else 2374 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2375 #endif 2376 hci_stack->local_supported_commands |= (1LU << i); 2377 } 2378 } 2379 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2380 } 2381 2382 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2383 UNUSED(size); 2384 2385 uint16_t manufacturer; 2386 #ifdef ENABLE_CLASSIC 2387 hci_con_handle_t handle; 2388 hci_connection_t * conn; 2389 uint8_t status; 2390 #endif 2391 // get num cmd packets - limit to 1 to reduce complexity 2392 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2393 2394 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2395 switch (opcode){ 2396 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2397 if (packet[5]) break; 2398 // terminate, name 248 chars 2399 packet[6+248] = 0; 2400 log_info("local name: %s", &packet[6]); 2401 break; 2402 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2403 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2404 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2405 uint16_t acl_len = little_endian_read_16(packet, 6); 2406 uint16_t sco_len = packet[8]; 2407 2408 // determine usable ACL/SCO payload size 2409 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2410 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2411 2412 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2413 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2414 2415 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2416 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2417 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2418 } 2419 break; 2420 case HCI_OPCODE_HCI_READ_RSSI: 2421 if (packet[5] == ERROR_CODE_SUCCESS){ 2422 uint8_t event[5]; 2423 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2424 event[1] = 3; 2425 (void)memcpy(&event[2], &packet[6], 3); 2426 hci_emit_event(event, sizeof(event), 1); 2427 } 2428 break; 2429 #ifdef ENABLE_BLE 2430 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2431 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2432 hci_stack->le_iso_packets_total_num = packet[11]; 2433 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2434 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2435 2436 /* fall through */ 2437 2438 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2439 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2440 hci_stack->le_acl_packets_total_num = packet[8]; 2441 // determine usable ACL payload size 2442 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2443 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2444 } 2445 log_info("hci_le_read_buffer_size: acl size %u, acl count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2446 break; 2447 #endif 2448 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2449 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2450 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2451 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2452 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); 2453 break; 2454 #endif 2455 #ifdef ENABLE_LE_CENTRAL 2456 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2457 hci_stack->le_whitelist_capacity = packet[6]; 2458 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2459 break; 2460 #endif 2461 #ifdef ENABLE_LE_PERIPHERAL 2462 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2463 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2464 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2465 break; 2466 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2467 if (hci_stack->le_advertising_set_in_current_command != 0) { 2468 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2469 hci_stack->le_advertising_set_in_current_command = 0; 2470 if (advertising_set == NULL) break; 2471 uint8_t adv_status = packet[6]; 2472 uint8_t tx_power = packet[7]; 2473 uint8_t event[] = { HCI_EVENT_META_GAP, 4, GAP_SUBEVENT_ADVERTISING_SET_INSTALLED, hci_stack->le_advertising_set_in_current_command, adv_status, tx_power }; 2474 if (adv_status == 0){ 2475 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2476 } 2477 hci_emit_event(event, sizeof(event), 1); 2478 } 2479 break; 2480 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2481 if (hci_stack->le_advertising_set_in_current_command != 0) { 2482 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2483 hci_stack->le_advertising_set_in_current_command = 0; 2484 if (advertising_set == NULL) break; 2485 uint8_t adv_status = packet[5]; 2486 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2487 if (adv_status == 0){ 2488 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2489 } 2490 hci_emit_event(event, sizeof(event), 1); 2491 } 2492 break; 2493 #endif 2494 #endif 2495 case HCI_OPCODE_HCI_READ_BD_ADDR: 2496 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2497 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)); 2498 #ifdef ENABLE_CLASSIC 2499 if (hci_stack->link_key_db){ 2500 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2501 } 2502 #endif 2503 break; 2504 #ifdef ENABLE_CLASSIC 2505 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2506 hci_emit_discoverable_enabled(hci_stack->discoverable); 2507 break; 2508 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2509 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2510 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2511 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2512 hci_emit_event(event, sizeof(event), 1); 2513 } 2514 break; 2515 #endif 2516 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2517 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2518 2519 #ifdef ENABLE_CLASSIC 2520 // determine usable ACL packet types based on host buffer size and supported features 2521 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2522 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2523 #endif 2524 // Classic/LE 2525 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2526 break; 2527 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2528 manufacturer = little_endian_read_16(packet, 10); 2529 // map Cypress to Broadcom 2530 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2531 log_info("Treat Cypress as Broadcom"); 2532 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2533 little_endian_store_16(packet, 10, manufacturer); 2534 } 2535 hci_stack->manufacturer = manufacturer; 2536 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2537 break; 2538 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2539 hci_store_local_supported_commands(packet); 2540 break; 2541 #ifdef ENABLE_CLASSIC 2542 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2543 if (packet[5]) return; 2544 hci_stack->synchronous_flow_control_enabled = 1; 2545 break; 2546 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2547 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2548 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2549 conn = hci_connection_for_handle(handle); 2550 if (conn != NULL) { 2551 uint8_t key_size = 0; 2552 if (status == 0){ 2553 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2554 log_info("Handle %04x key Size: %u", handle, key_size); 2555 } else { 2556 key_size = 1; 2557 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2558 } 2559 hci_handle_read_encryption_key_size_complete(conn, key_size); 2560 } 2561 break; 2562 // assert pairing complete event is emitted. 2563 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2564 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2565 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2566 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2567 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2568 // lookup connection by gap pairing addr 2569 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2570 if (conn == NULL) break; 2571 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2572 break; 2573 2574 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2575 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2576 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2577 uint8_t event[67]; 2578 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2579 event[1] = 65; 2580 (void)memset(&event[2], 0, 65); 2581 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2582 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2583 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2584 event[2] = 3; 2585 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2586 } else { 2587 event[2] = 1; 2588 } 2589 } 2590 hci_emit_event(event, sizeof(event), 0); 2591 break; 2592 } 2593 2594 // note: only needed if user does not provide OOB data 2595 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2596 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2597 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2598 if (conn == NULL) break; 2599 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2600 break; 2601 #endif 2602 #endif 2603 default: 2604 break; 2605 } 2606 } 2607 2608 #ifdef ENABLE_BLE 2609 static void event_handle_le_connection_complete(const uint8_t * packet){ 2610 bd_addr_t addr; 2611 bd_addr_type_t addr_type; 2612 hci_connection_t * conn; 2613 2614 // Connection management 2615 reverse_bd_addr(&packet[8], addr); 2616 addr_type = (bd_addr_type_t)packet[7]; 2617 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2618 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2619 2620 #ifdef ENABLE_LE_CENTRAL 2621 // handle error: error is reported only to the initiator -> outgoing connection 2622 if (packet[3]){ 2623 2624 // handle cancelled outgoing connection 2625 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2626 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2627 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2628 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2629 // reset state 2630 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2631 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2632 // get outgoing connection conn struct for direct connect 2633 conn = gap_get_outgoing_connection(); 2634 } 2635 2636 // outgoing le connection establishment is done 2637 if (conn){ 2638 // remove entry 2639 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2640 btstack_memory_hci_connection_free( conn ); 2641 } 2642 return; 2643 } 2644 #endif 2645 2646 // on success, both hosts receive connection complete event 2647 if (packet[6] == HCI_ROLE_MASTER){ 2648 #ifdef ENABLE_LE_CENTRAL 2649 // if we're master on an le connection, it was an outgoing connection and we're done with it 2650 // note: no hci_connection_t object exists yet for connect with whitelist 2651 if (hci_is_le_connection_type(addr_type)){ 2652 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2653 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2654 } 2655 #endif 2656 } else { 2657 #ifdef ENABLE_LE_PERIPHERAL 2658 // if we're slave, it was an incoming connection, advertisements have stopped 2659 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2660 #endif 2661 } 2662 2663 // LE connections are auto-accepted, so just create a connection if there isn't one already 2664 if (!conn){ 2665 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2666 } 2667 2668 // no memory, sorry. 2669 if (!conn){ 2670 return; 2671 } 2672 2673 conn->state = OPEN; 2674 conn->role = packet[6]; 2675 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2676 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2677 2678 #ifdef ENABLE_LE_PERIPHERAL 2679 if (packet[6] == HCI_ROLE_SLAVE){ 2680 hci_update_advertisements_enabled_for_current_roles(); 2681 } 2682 #endif 2683 2684 // init unenhanced att bearer mtu 2685 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2686 conn->att_connection.mtu_exchanged = false; 2687 2688 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2689 2690 // restart timer 2691 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2692 // btstack_run_loop_add_timer(&conn->timeout); 2693 2694 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2695 2696 hci_emit_nr_connections_changed(); 2697 } 2698 #endif 2699 2700 #ifdef ENABLE_CLASSIC 2701 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){ 2702 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2703 // LEVEL_4 is tested by l2cap 2704 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2705 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2706 if (level >= LEVEL_3){ 2707 // MITM not possible without keyboard or display 2708 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2709 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2710 2711 // MITM possible if one side has keyboard and the other has keyboard or display 2712 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2713 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2714 2715 // MITM not possible if one side has only display and other side has no keyboard 2716 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2717 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2718 } 2719 // LEVEL 2 requires SSP, which is a given 2720 return true; 2721 } 2722 2723 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2724 uint16_t i; 2725 for (i=0; i < size ; i++){ 2726 if (data[i] != 0) { 2727 return false; 2728 } 2729 } 2730 return true; 2731 } 2732 2733 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2734 // get requested security level 2735 gap_security_level_t requested_security_level = conn->requested_security_level; 2736 if (hci_stack->gap_secure_connections_only_mode){ 2737 requested_security_level = LEVEL_4; 2738 } 2739 2740 // assess security: LEVEL 4 requires SC 2741 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2742 if ((requested_security_level == LEVEL_4) && 2743 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2744 !hci_remote_sc_enabled(conn)){ 2745 log_info("Level 4 required, but SC not supported -> abort"); 2746 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2747 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2748 return; 2749 } 2750 2751 // assess security based on io capabilities 2752 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2753 // responder: fully validate io caps of both sides as well as OOB data 2754 bool security_possible = false; 2755 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2756 2757 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2758 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2759 // so we merge the OOB data availability 2760 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2761 if (conn->classic_oob_c_192 != NULL){ 2762 have_oob_data |= 1; 2763 } 2764 if (conn->classic_oob_c_256 != NULL){ 2765 have_oob_data |= 2; 2766 } 2767 // for up to Level 3, either P-192 as well as P-256 will do 2768 // 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 2769 // if remote does not SC, we should not receive P-256 data either 2770 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2771 security_possible = true; 2772 } 2773 // for Level 4, P-256 is needed 2774 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2775 security_possible = true; 2776 } 2777 #endif 2778 2779 if (security_possible == false){ 2780 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2781 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2782 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2783 return; 2784 } 2785 } else { 2786 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2787 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2788 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2789 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2790 log_info("Level 3+ required, but no input/output -> abort"); 2791 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2792 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2793 return; 2794 } 2795 #endif 2796 #endif 2797 } 2798 2799 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2800 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2801 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2802 } else { 2803 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2804 } 2805 #endif 2806 } 2807 2808 #endif 2809 2810 static void event_handler(uint8_t *packet, uint16_t size){ 2811 2812 uint16_t event_length = packet[1]; 2813 2814 // assert packet is complete 2815 if (size != (event_length + 2u)){ 2816 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2817 return; 2818 } 2819 2820 bd_addr_type_t addr_type; 2821 hci_con_handle_t handle; 2822 hci_connection_t * conn; 2823 int i; 2824 int create_connection_cmd; 2825 2826 #ifdef ENABLE_CLASSIC 2827 hci_link_type_t link_type; 2828 bd_addr_t addr; 2829 #endif 2830 2831 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2832 2833 switch (hci_event_packet_get_type(packet)) { 2834 2835 case HCI_EVENT_COMMAND_COMPLETE: 2836 handle_command_complete_event(packet, size); 2837 break; 2838 2839 case HCI_EVENT_COMMAND_STATUS: 2840 // get num cmd packets - limit to 1 to reduce complexity 2841 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2842 2843 // check command status to detected failed outgoing connections 2844 create_connection_cmd = 0; 2845 #ifdef ENABLE_CLASSIC 2846 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2847 create_connection_cmd = 1; 2848 } 2849 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2850 create_connection_cmd = 1; 2851 } 2852 #endif 2853 #ifdef ENABLE_LE_CENTRAL 2854 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2855 create_connection_cmd = 1; 2856 } 2857 #endif 2858 if (create_connection_cmd) { 2859 uint8_t status = hci_event_command_status_get_status(packet); 2860 addr_type = hci_stack->outgoing_addr_type; 2861 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2862 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); 2863 2864 // reset outgoing address info 2865 memset(hci_stack->outgoing_addr, 0, 6); 2866 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2867 2868 // on error 2869 if (status != ERROR_CODE_SUCCESS){ 2870 #ifdef ENABLE_LE_CENTRAL 2871 if (hci_is_le_connection_type(addr_type)){ 2872 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2873 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2874 } 2875 #endif 2876 // error => outgoing connection failed 2877 if (conn != NULL){ 2878 hci_handle_connection_failed(conn, status); 2879 } 2880 } 2881 } 2882 2883 #ifdef ENABLE_CLASSIC 2884 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2885 uint8_t status = hci_event_command_status_get_status(packet); 2886 log_info("command status (inquiry), status %x", status); 2887 if (status == ERROR_CODE_SUCCESS) { 2888 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2889 } else { 2890 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2891 } 2892 } 2893 #endif 2894 break; 2895 2896 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2897 if (size < 3) return; 2898 uint16_t num_handles = packet[2]; 2899 if (size != (3u + num_handles * 4u)) return; 2900 uint16_t offset = 3; 2901 for (i=0; i<num_handles;i++){ 2902 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2903 offset += 2u; 2904 uint16_t num_packets = little_endian_read_16(packet, offset); 2905 offset += 2u; 2906 2907 conn = hci_connection_for_handle(handle); 2908 if (!conn){ 2909 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2910 continue; 2911 } 2912 2913 if (conn->num_packets_sent >= num_packets){ 2914 conn->num_packets_sent -= num_packets; 2915 } else { 2916 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2917 conn->num_packets_sent = 0; 2918 } 2919 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2920 2921 #ifdef ENABLE_CLASSIC 2922 // For SCO, we do the can_send_now_check here 2923 hci_notify_if_sco_can_send_now(); 2924 #endif 2925 } 2926 break; 2927 } 2928 2929 #ifdef ENABLE_CLASSIC 2930 case HCI_EVENT_FLUSH_OCCURRED: 2931 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 2932 handle = hci_event_flush_occurred_get_handle(packet); 2933 conn = hci_connection_for_handle(handle); 2934 if (conn) { 2935 log_info("Flush occurred, disconnect 0x%04x", handle); 2936 conn->state = SEND_DISCONNECT; 2937 } 2938 break; 2939 2940 case HCI_EVENT_INQUIRY_COMPLETE: 2941 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2942 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2943 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2944 hci_emit_event(event, sizeof(event), 1); 2945 } 2946 break; 2947 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2948 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2949 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2950 } 2951 break; 2952 case HCI_EVENT_CONNECTION_REQUEST: 2953 reverse_bd_addr(&packet[2], addr); 2954 link_type = (hci_link_type_t) packet[11]; 2955 2956 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2957 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2958 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2959 bd_addr_copy(hci_stack->decline_addr, addr); 2960 break; 2961 } 2962 2963 if (hci_stack->gap_classic_accept_callback != NULL){ 2964 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2965 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2966 bd_addr_copy(hci_stack->decline_addr, addr); 2967 break; 2968 } 2969 } 2970 2971 // TODO: eval COD 8-10 2972 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2973 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2974 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2975 if (!conn) { 2976 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2977 } 2978 if (!conn) { 2979 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2980 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2981 bd_addr_copy(hci_stack->decline_addr, addr); 2982 hci_run(); 2983 // avoid event to higher layer 2984 return; 2985 } 2986 conn->role = HCI_ROLE_SLAVE; 2987 conn->state = RECEIVED_CONNECTION_REQUEST; 2988 // store info about eSCO 2989 if (link_type == HCI_LINK_TYPE_ESCO){ 2990 conn->remote_supported_features[0] |= 1; 2991 } 2992 hci_run(); 2993 break; 2994 2995 case HCI_EVENT_CONNECTION_COMPLETE: 2996 // Connection management 2997 reverse_bd_addr(&packet[5], addr); 2998 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2999 addr_type = BD_ADDR_TYPE_ACL; 3000 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3001 if (conn) { 3002 if (!packet[2]){ 3003 conn->state = OPEN; 3004 conn->con_handle = little_endian_read_16(packet, 3); 3005 3006 // trigger write supervision timeout if we're master 3007 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3008 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3009 } 3010 3011 // trigger write automatic flush timeout 3012 if (hci_stack->automatic_flush_timeout != 0){ 3013 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3014 } 3015 3016 // restart timer 3017 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3018 btstack_run_loop_add_timer(&conn->timeout); 3019 3020 // trigger remote features for dedicated bonding 3021 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3022 hci_trigger_remote_features_for_connection(conn); 3023 } 3024 3025 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3026 3027 hci_emit_nr_connections_changed(); 3028 } else { 3029 // connection failed 3030 hci_handle_connection_failed(conn, packet[2]); 3031 } 3032 } 3033 break; 3034 3035 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3036 reverse_bd_addr(&packet[5], addr); 3037 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3038 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3039 if (packet[2]){ 3040 // connection failed 3041 if (conn){ 3042 hci_handle_connection_failed(conn, packet[2]); 3043 } 3044 break; 3045 } 3046 if (!conn) { 3047 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3048 } 3049 if (!conn) { 3050 break; 3051 } 3052 conn->state = OPEN; 3053 conn->con_handle = little_endian_read_16(packet, 3); 3054 3055 #ifdef ENABLE_SCO_OVER_HCI 3056 // update SCO 3057 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3058 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3059 } 3060 // trigger can send now 3061 if (hci_have_usb_transport()){ 3062 hci_stack->sco_can_send_now = true; 3063 } 3064 #endif 3065 #ifdef HAVE_SCO_TRANSPORT 3066 // configure sco transport 3067 if (hci_stack->sco_transport != NULL){ 3068 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3069 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3070 } 3071 #endif 3072 break; 3073 3074 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3075 handle = little_endian_read_16(packet, 3); 3076 conn = hci_connection_for_handle(handle); 3077 if (!conn) break; 3078 if (!packet[2]){ 3079 const uint8_t * features = &packet[5]; 3080 hci_handle_remote_features_page_0(conn, features); 3081 3082 // read extended features if possible 3083 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3084 && ((conn->remote_supported_features[0] & 2) != 0)) { 3085 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3086 break; 3087 } 3088 } 3089 hci_handle_remote_features_received(conn); 3090 break; 3091 3092 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3093 handle = little_endian_read_16(packet, 3); 3094 conn = hci_connection_for_handle(handle); 3095 if (!conn) break; 3096 // status = ok, page = 1 3097 if (!packet[2]) { 3098 uint8_t page_number = packet[5]; 3099 uint8_t maximum_page_number = packet[6]; 3100 const uint8_t * features = &packet[7]; 3101 bool done = false; 3102 switch (page_number){ 3103 case 1: 3104 hci_handle_remote_features_page_1(conn, features); 3105 if (maximum_page_number >= 2){ 3106 // get Secure Connections (Controller) from Page 2 if available 3107 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3108 } else { 3109 // otherwise, assume SC (Controller) == SC (Host) 3110 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3111 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3112 } 3113 done = true; 3114 } 3115 break; 3116 case 2: 3117 hci_handle_remote_features_page_2(conn, features); 3118 done = true; 3119 break; 3120 default: 3121 break; 3122 } 3123 if (!done) break; 3124 } 3125 hci_handle_remote_features_received(conn); 3126 break; 3127 3128 case HCI_EVENT_LINK_KEY_REQUEST: 3129 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3130 hci_event_link_key_request_get_bd_addr(packet, addr); 3131 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3132 if (!conn) break; 3133 3134 // lookup link key in db if not cached 3135 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3136 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3137 } 3138 3139 // response sent by hci_run() 3140 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3141 #endif 3142 break; 3143 3144 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3145 hci_event_link_key_request_get_bd_addr(packet, addr); 3146 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3147 if (!conn) break; 3148 3149 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3150 3151 // CVE-2020-26555: ignore NULL link key 3152 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3153 if (btstack_is_null(&packet[8], 16)) break; 3154 3155 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3156 // Change Connection Encryption keeps link key type 3157 if (link_key_type != CHANGED_COMBINATION_KEY){ 3158 conn->link_key_type = link_key_type; 3159 } 3160 3161 // cache link key. link keys stored in little-endian format for legacy reasons 3162 memcpy(&conn->link_key, &packet[8], 16); 3163 3164 // only store link key: 3165 // - if bondable enabled 3166 if (hci_stack->bondable == false) break; 3167 // - if security level sufficient 3168 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3169 // - for SSP, also check if remote side requested bonding as well 3170 if (conn->link_key_type != COMBINATION_KEY){ 3171 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3172 if (!remote_bonding){ 3173 break; 3174 } 3175 } 3176 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3177 break; 3178 } 3179 3180 case HCI_EVENT_PIN_CODE_REQUEST: 3181 hci_event_pin_code_request_get_bd_addr(packet, addr); 3182 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3183 if (!conn) break; 3184 3185 hci_pairing_started(conn, false); 3186 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3187 if (!hci_stack->bondable ){ 3188 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3189 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3190 hci_run(); 3191 return; 3192 } 3193 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3194 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3195 log_info("Level 4 required, but SC not supported -> abort"); 3196 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3197 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3198 hci_run(); 3199 return; 3200 } 3201 break; 3202 3203 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3204 hci_event_io_capability_response_get_bd_addr(packet, addr); 3205 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3206 if (!conn) break; 3207 3208 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3209 hci_pairing_started(conn, true); 3210 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3211 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3212 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3213 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3214 #endif 3215 break; 3216 3217 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3218 hci_event_io_capability_response_get_bd_addr(packet, addr); 3219 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3220 if (!conn) break; 3221 3222 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3223 hci_connection_timestamp(conn); 3224 hci_pairing_started(conn, true); 3225 break; 3226 3227 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3228 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3229 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3230 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3231 if (!conn) break; 3232 3233 hci_connection_timestamp(conn); 3234 3235 hci_pairing_started(conn, true); 3236 3237 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3238 break; 3239 #endif 3240 3241 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3242 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3243 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3244 if (!conn) break; 3245 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3246 if (hci_stack->ssp_auto_accept){ 3247 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3248 }; 3249 } else { 3250 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3251 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3252 // don't forward event to app 3253 hci_run(); 3254 return; 3255 } 3256 break; 3257 3258 case HCI_EVENT_USER_PASSKEY_REQUEST: 3259 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3260 if (hci_stack->ssp_auto_accept){ 3261 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3262 }; 3263 break; 3264 3265 case HCI_EVENT_MODE_CHANGE: 3266 handle = hci_event_mode_change_get_handle(packet); 3267 conn = hci_connection_for_handle(handle); 3268 if (!conn) break; 3269 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3270 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3271 break; 3272 #endif 3273 3274 case HCI_EVENT_ENCRYPTION_CHANGE: 3275 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3276 handle = hci_event_encryption_change_get_connection_handle(packet); 3277 conn = hci_connection_for_handle(handle); 3278 if (!conn) break; 3279 if (hci_event_encryption_change_get_status(packet) == 0u) { 3280 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3281 if (encryption_enabled){ 3282 if (hci_is_le_connection(conn)){ 3283 // For LE, we accept connection as encrypted 3284 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3285 } 3286 #ifdef ENABLE_CLASSIC 3287 else { 3288 3289 // dedicated bonding: send result and disconnect 3290 if (conn->bonding_flags & BONDING_DEDICATED){ 3291 conn->bonding_flags &= ~BONDING_DEDICATED; 3292 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3293 conn->bonding_status = packet[2]; 3294 break; 3295 } 3296 3297 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3298 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3299 bool connected_uses_aes_ccm = encryption_enabled == 2; 3300 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3301 log_info("SC during pairing, but only E0 now -> abort"); 3302 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3303 break; 3304 } 3305 3306 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3307 if (connected_uses_aes_ccm){ 3308 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3309 } 3310 3311 #ifdef ENABLE_TESTING_SUPPORT 3312 // work around for issue with PTS dongle 3313 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3314 #endif 3315 // validate encryption key size 3316 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3317 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3318 // already got encryption key size 3319 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3320 } else { 3321 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3322 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3323 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3324 } else { 3325 // if not, pretend everything is perfect 3326 hci_handle_read_encryption_key_size_complete(conn, 16); 3327 } 3328 } 3329 } 3330 #endif 3331 } else { 3332 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3333 } 3334 } 3335 3336 break; 3337 3338 #ifdef ENABLE_CLASSIC 3339 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3340 handle = hci_event_authentication_complete_get_connection_handle(packet); 3341 conn = hci_connection_for_handle(handle); 3342 if (!conn) break; 3343 3344 // clear authentication active flag 3345 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3346 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3347 3348 // authenticated only if auth status == 0 3349 if (hci_event_authentication_complete_get_status(packet) == 0){ 3350 // authenticated 3351 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3352 3353 // If not already encrypted, start encryption 3354 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3355 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3356 break; 3357 } 3358 } 3359 3360 // emit updated security level 3361 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3362 break; 3363 3364 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3365 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3366 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3367 if (!conn) break; 3368 3369 // treat successfully paired connection as authenticated 3370 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3371 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3372 } 3373 3374 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3375 break; 3376 #endif 3377 3378 // HCI_EVENT_DISCONNECTION_COMPLETE 3379 // has been split, to first notify stack before shutting connection down 3380 // see end of function, too. 3381 case HCI_EVENT_DISCONNECTION_COMPLETE: 3382 if (packet[2]) break; // status != 0 3383 handle = little_endian_read_16(packet, 3); 3384 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3385 if (hci_stack->acl_fragmentation_total_size > 0u) { 3386 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3387 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3388 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3389 hci_stack->acl_fragmentation_total_size = 0; 3390 hci_stack->acl_fragmentation_pos = 0; 3391 if (release_buffer){ 3392 hci_release_packet_buffer(); 3393 } 3394 } 3395 } 3396 3397 conn = hci_connection_for_handle(handle); 3398 if (!conn) break; 3399 #ifdef ENABLE_CLASSIC 3400 // pairing failed if it was ongoing 3401 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3402 #endif 3403 3404 // emit dedicatd bonding event 3405 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3406 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3407 } 3408 3409 // mark connection for shutdown, stop timers, reset state 3410 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3411 hci_connection_stop_timer(conn); 3412 hci_connection_init(conn); 3413 3414 #ifdef ENABLE_BLE 3415 #ifdef ENABLE_LE_PERIPHERAL 3416 // re-enable advertisements for le connections if active 3417 if (hci_is_le_connection(conn)){ 3418 hci_update_advertisements_enabled_for_current_roles(); 3419 } 3420 #endif 3421 #endif 3422 break; 3423 3424 case HCI_EVENT_HARDWARE_ERROR: 3425 log_error("Hardware Error: 0x%02x", packet[2]); 3426 if (hci_stack->hardware_error_callback){ 3427 (*hci_stack->hardware_error_callback)(packet[2]); 3428 } else { 3429 // if no special requests, just reboot stack 3430 hci_power_control_off(); 3431 hci_power_control_on(); 3432 } 3433 break; 3434 3435 #ifdef ENABLE_CLASSIC 3436 case HCI_EVENT_ROLE_CHANGE: 3437 if (packet[2]) break; // status != 0 3438 reverse_bd_addr(&packet[3], addr); 3439 addr_type = BD_ADDR_TYPE_ACL; 3440 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3441 if (!conn) break; 3442 conn->role = packet[9]; 3443 break; 3444 #endif 3445 3446 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3447 // release packet buffer only for asynchronous transport and if there are not further fragements 3448 if (hci_transport_synchronous()) { 3449 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3450 return; // instead of break: to avoid re-entering hci_run() 3451 } 3452 hci_stack->acl_fragmentation_tx_active = 0; 3453 if (hci_stack->acl_fragmentation_total_size) break; 3454 hci_release_packet_buffer(); 3455 3456 // L2CAP receives this event via the hci_emit_event below 3457 3458 #ifdef ENABLE_CLASSIC 3459 // For SCO, we do the can_send_now_check here 3460 hci_notify_if_sco_can_send_now(); 3461 #endif 3462 break; 3463 3464 #ifdef ENABLE_CLASSIC 3465 case HCI_EVENT_SCO_CAN_SEND_NOW: 3466 // For SCO, we do the can_send_now_check here 3467 hci_stack->sco_can_send_now = true; 3468 hci_notify_if_sco_can_send_now(); 3469 return; 3470 3471 // explode inquriy results for easier consumption 3472 case HCI_EVENT_INQUIRY_RESULT: 3473 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3474 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3475 gap_inquiry_explode(packet, size); 3476 break; 3477 #endif 3478 3479 #ifdef ENABLE_BLE 3480 case HCI_EVENT_LE_META: 3481 switch (packet[2]){ 3482 #ifdef ENABLE_LE_CENTRAL 3483 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3484 if (!hci_stack->le_scanning_enabled) break; 3485 le_handle_advertisement_report(packet, size); 3486 break; 3487 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3488 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3489 if (!hci_stack->le_scanning_enabled) break; 3490 le_handle_extended_advertisement_report(packet, size); 3491 break; 3492 #endif 3493 #endif 3494 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3495 event_handle_le_connection_complete(packet); 3496 break; 3497 3498 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3499 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3500 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3501 conn = hci_connection_for_handle(handle); 3502 if (!conn) break; 3503 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3504 break; 3505 3506 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3507 // connection 3508 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3509 conn = hci_connection_for_handle(handle); 3510 if (conn) { 3511 // read arguments 3512 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3513 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3514 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3515 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3516 3517 // validate against current connection parameter range 3518 le_connection_parameter_range_t existing_range; 3519 gap_get_connection_parameter_range(&existing_range); 3520 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3521 if (update_parameter){ 3522 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3523 conn->le_conn_interval_min = le_conn_interval_min; 3524 conn->le_conn_interval_max = le_conn_interval_max; 3525 conn->le_conn_latency = le_conn_latency; 3526 conn->le_supervision_timeout = le_supervision_timeout; 3527 } else { 3528 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3529 } 3530 } 3531 break; 3532 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3533 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3534 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3535 conn = hci_connection_for_handle(handle); 3536 if (conn) { 3537 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3538 } 3539 break; 3540 #endif 3541 default: 3542 break; 3543 } 3544 break; 3545 #endif 3546 case HCI_EVENT_VENDOR_SPECIFIC: 3547 // Vendor specific commands often create vendor specific event instead of num completed packets 3548 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3549 switch (hci_stack->manufacturer){ 3550 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3551 hci_stack->num_cmd_packets = 1; 3552 break; 3553 default: 3554 break; 3555 } 3556 break; 3557 default: 3558 break; 3559 } 3560 3561 handle_event_for_current_stack_state(packet, size); 3562 3563 // notify upper stack 3564 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3565 3566 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3567 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3568 handle = little_endian_read_16(packet, 3); 3569 hci_connection_t * aConn = hci_connection_for_handle(handle); 3570 // discard connection if app did not trigger a reconnect in the event handler 3571 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3572 hci_shutdown_connection(aConn); 3573 } 3574 } 3575 3576 // execute main loop 3577 hci_run(); 3578 } 3579 3580 #ifdef ENABLE_CLASSIC 3581 3582 #ifdef ENABLE_SCO_OVER_HCI 3583 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3584 static void sco_schedule_tx(hci_connection_t * conn); 3585 3586 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3587 log_debug("SCO TX Timeout"); 3588 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3589 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3590 if (!conn) return; 3591 3592 // trigger send 3593 conn->sco_tx_ready = 1; 3594 // extra packet if CVSD but SCO buffer is too short 3595 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3596 conn->sco_tx_ready++; 3597 } 3598 hci_notify_if_sco_can_send_now(); 3599 } 3600 3601 3602 #define SCO_TX_AFTER_RX_MS (6) 3603 3604 static void sco_schedule_tx(hci_connection_t * conn){ 3605 3606 uint32_t now = btstack_run_loop_get_time_ms(); 3607 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3608 int time_delta_ms = sco_tx_ms - now; 3609 3610 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3611 3612 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3613 btstack_run_loop_remove_timer(timer); 3614 btstack_run_loop_set_timer(timer, time_delta_ms); 3615 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3616 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3617 btstack_run_loop_add_timer(timer); 3618 } 3619 #endif 3620 3621 static void sco_handler(uint8_t * packet, uint16_t size){ 3622 // lookup connection struct 3623 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3624 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3625 if (!conn) return; 3626 3627 #ifdef ENABLE_SCO_OVER_HCI 3628 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3629 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3630 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3631 packet[2] = 0x3c; 3632 memmove(&packet[3], &packet[23], 63); 3633 size = 63; 3634 } 3635 } 3636 3637 if (hci_have_usb_transport()){ 3638 // Nothing to do 3639 } else { 3640 // 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); 3641 if (hci_stack->synchronous_flow_control_enabled == 0){ 3642 uint32_t now = btstack_run_loop_get_time_ms(); 3643 3644 if (!conn->sco_rx_valid){ 3645 // ignore first 10 packets 3646 conn->sco_rx_count++; 3647 // log_debug("sco rx count %u", conn->sco_rx_count); 3648 if (conn->sco_rx_count == 10) { 3649 // use first timestamp as is and pretent it just started 3650 conn->sco_rx_ms = now; 3651 conn->sco_rx_valid = 1; 3652 conn->sco_rx_count = 0; 3653 sco_schedule_tx(conn); 3654 } 3655 } else { 3656 // track expected arrival timme 3657 conn->sco_rx_count++; 3658 conn->sco_rx_ms += 7; 3659 int delta = (int32_t) (now - conn->sco_rx_ms); 3660 if (delta > 0){ 3661 conn->sco_rx_ms++; 3662 } 3663 // log_debug("sco rx %u", conn->sco_rx_ms); 3664 sco_schedule_tx(conn); 3665 } 3666 } 3667 } 3668 #endif 3669 3670 // deliver to app 3671 if (hci_stack->sco_packet_handler) { 3672 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3673 } 3674 3675 #ifdef HAVE_SCO_TRANSPORT 3676 // We can send one packet for each received packet 3677 conn->sco_tx_ready++; 3678 hci_notify_if_sco_can_send_now(); 3679 #endif 3680 3681 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3682 conn->num_packets_completed++; 3683 hci_stack->host_completed_packets = 1; 3684 hci_run(); 3685 #endif 3686 } 3687 #endif 3688 3689 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3690 hci_dump_packet(packet_type, 1, packet, size); 3691 switch (packet_type) { 3692 case HCI_EVENT_PACKET: 3693 event_handler(packet, size); 3694 break; 3695 case HCI_ACL_DATA_PACKET: 3696 acl_handler(packet, size); 3697 break; 3698 #ifdef ENABLE_CLASSIC 3699 case HCI_SCO_DATA_PACKET: 3700 sco_handler(packet, size); 3701 break; 3702 #endif 3703 default: 3704 break; 3705 } 3706 } 3707 3708 /** 3709 * @brief Add event packet handler. 3710 */ 3711 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3712 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3713 } 3714 3715 /** 3716 * @brief Remove event packet handler. 3717 */ 3718 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3719 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3720 } 3721 3722 /** Register HCI packet handlers */ 3723 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3724 hci_stack->acl_packet_handler = handler; 3725 } 3726 3727 #ifdef ENABLE_CLASSIC 3728 /** 3729 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3730 */ 3731 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3732 hci_stack->sco_packet_handler = handler; 3733 } 3734 #endif 3735 3736 static void hci_state_reset(void){ 3737 // no connections yet 3738 hci_stack->connections = NULL; 3739 3740 // keep discoverable/connectable as this has been requested by the client(s) 3741 // hci_stack->discoverable = 0; 3742 // hci_stack->connectable = 0; 3743 // hci_stack->bondable = 1; 3744 // hci_stack->own_addr_type = 0; 3745 3746 // buffer is free 3747 hci_stack->hci_packet_buffer_reserved = false; 3748 3749 // no pending cmds 3750 hci_stack->decline_reason = 0; 3751 3752 hci_stack->secure_connections_active = false; 3753 3754 #ifdef ENABLE_CLASSIC 3755 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3756 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3757 3758 hci_stack->gap_tasks_classic = 3759 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3760 GAP_TASK_SET_CLASS_OF_DEVICE | 3761 GAP_TASK_SET_LOCAL_NAME | 3762 GAP_TASK_SET_EIR_DATA | 3763 GAP_TASK_WRITE_SCAN_ENABLE | 3764 GAP_TASK_WRITE_PAGE_TIMEOUT; 3765 #endif 3766 3767 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3768 hci_stack->classic_read_local_oob_data = false; 3769 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3770 #endif 3771 3772 // LE 3773 #ifdef ENABLE_BLE 3774 memset(hci_stack->le_random_address, 0, 6); 3775 hci_stack->le_random_address_set = 0; 3776 #endif 3777 #ifdef ENABLE_LE_CENTRAL 3778 hci_stack->le_scanning_active = false; 3779 hci_stack->le_scanning_param_update = true; 3780 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3781 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3782 hci_stack->le_whitelist_capacity = 0; 3783 #endif 3784 #ifdef ENABLE_LE_PERIPHERAL 3785 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3786 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3787 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3788 } 3789 if (hci_stack->le_advertisements_data != NULL){ 3790 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3791 } 3792 #endif 3793 } 3794 3795 #ifdef ENABLE_CLASSIC 3796 /** 3797 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3798 */ 3799 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3800 // store and open remote device db 3801 hci_stack->link_key_db = link_key_db; 3802 if (hci_stack->link_key_db) { 3803 hci_stack->link_key_db->open(); 3804 } 3805 } 3806 #endif 3807 3808 void hci_init(const hci_transport_t *transport, const void *config){ 3809 3810 #ifdef HAVE_MALLOC 3811 if (!hci_stack) { 3812 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3813 } 3814 #else 3815 hci_stack = &hci_stack_static; 3816 #endif 3817 memset(hci_stack, 0, sizeof(hci_stack_t)); 3818 3819 // reference to use transport layer implementation 3820 hci_stack->hci_transport = transport; 3821 3822 // reference to used config 3823 hci_stack->config = config; 3824 3825 // setup pointer for outgoing packet buffer 3826 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3827 3828 // max acl payload size defined in config.h 3829 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3830 3831 // register packet handlers with transport 3832 transport->register_packet_handler(&packet_handler); 3833 3834 hci_stack->state = HCI_STATE_OFF; 3835 3836 // class of device 3837 hci_stack->class_of_device = 0x007a020c; // Smartphone 3838 3839 // bondable by default 3840 hci_stack->bondable = 1; 3841 3842 #ifdef ENABLE_CLASSIC 3843 // classic name 3844 hci_stack->local_name = default_classic_name; 3845 3846 // Master slave policy 3847 hci_stack->master_slave_policy = 1; 3848 3849 // Allow Role Switch 3850 hci_stack->allow_role_switch = 1; 3851 3852 // Default / minimum security level = 2 3853 hci_stack->gap_security_level = LEVEL_2; 3854 3855 // Default Security Mode 4 3856 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3857 3858 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3859 hci_stack->gap_required_encyrption_key_size = 7; 3860 3861 // Link Supervision Timeout 3862 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3863 3864 #endif 3865 3866 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3867 hci_stack->ssp_enable = 1; 3868 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3869 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3870 hci_stack->ssp_auto_accept = 1; 3871 3872 // Secure Connections: enable (requires support from Controller) 3873 hci_stack->secure_connections_enable = true; 3874 3875 // voice setting - signed 16 bit pcm data with CVSD over the air 3876 hci_stack->sco_voice_setting = 0x60; 3877 3878 #ifdef ENABLE_LE_CENTRAL 3879 // connection parameter to use for outgoing connections 3880 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3881 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3882 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3883 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3884 hci_stack->le_connection_latency = 4; // 4 3885 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3886 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3887 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3888 3889 // default LE Scanning 3890 hci_stack->le_scan_type = 0x1; // active 3891 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3892 hci_stack->le_scan_window = 0x30; // 30 ms 3893 #endif 3894 3895 #ifdef ENABLE_LE_PERIPHERAL 3896 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3897 #endif 3898 3899 // connection parameter range used to answer connection parameter update requests in l2cap 3900 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3901 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3902 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3903 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3904 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3905 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3906 3907 hci_state_reset(); 3908 } 3909 3910 void hci_deinit(void){ 3911 btstack_run_loop_remove_timer(&hci_stack->timeout); 3912 #ifdef HAVE_MALLOC 3913 if (hci_stack) { 3914 free(hci_stack); 3915 } 3916 #endif 3917 hci_stack = NULL; 3918 3919 #ifdef ENABLE_CLASSIC 3920 disable_l2cap_timeouts = 0; 3921 #endif 3922 } 3923 3924 /** 3925 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3926 */ 3927 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3928 hci_stack->chipset = chipset_driver; 3929 3930 // reset chipset driver - init is also called on power_up 3931 if (hci_stack->chipset && hci_stack->chipset->init){ 3932 hci_stack->chipset->init(hci_stack->config); 3933 } 3934 } 3935 3936 /** 3937 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3938 */ 3939 void hci_set_control(const btstack_control_t *hardware_control){ 3940 // references to used control implementation 3941 hci_stack->control = hardware_control; 3942 // init with transport config 3943 hardware_control->init(hci_stack->config); 3944 } 3945 3946 static void hci_discard_connections(void){ 3947 btstack_linked_list_iterator_t lit; 3948 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3949 while (btstack_linked_list_iterator_has_next(&lit)){ 3950 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3951 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3952 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3953 hci_shutdown_connection(connection); 3954 } 3955 } 3956 3957 void hci_close(void){ 3958 3959 #ifdef ENABLE_CLASSIC 3960 // close remote device db 3961 if (hci_stack->link_key_db) { 3962 hci_stack->link_key_db->close(); 3963 } 3964 #endif 3965 3966 hci_discard_connections(); 3967 3968 hci_power_control(HCI_POWER_OFF); 3969 3970 #ifdef HAVE_MALLOC 3971 free(hci_stack); 3972 #endif 3973 hci_stack = NULL; 3974 } 3975 3976 #ifdef HAVE_SCO_TRANSPORT 3977 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3978 hci_stack->sco_transport = sco_transport; 3979 sco_transport->register_packet_handler(&packet_handler); 3980 } 3981 #endif 3982 3983 #ifdef ENABLE_CLASSIC 3984 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3985 // validate ranage and set 3986 if (encryption_key_size < 7) return; 3987 if (encryption_key_size > 16) return; 3988 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3989 } 3990 3991 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3992 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3993 hci_stack->gap_security_mode = security_mode; 3994 return ERROR_CODE_SUCCESS; 3995 } else { 3996 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3997 } 3998 } 3999 4000 gap_security_mode_t gap_get_security_mode(void){ 4001 return hci_stack->gap_security_mode; 4002 } 4003 4004 void gap_set_security_level(gap_security_level_t security_level){ 4005 hci_stack->gap_security_level = security_level; 4006 } 4007 4008 gap_security_level_t gap_get_security_level(void){ 4009 if (hci_stack->gap_secure_connections_only_mode){ 4010 return LEVEL_4; 4011 } 4012 return hci_stack->gap_security_level; 4013 } 4014 4015 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4016 hci_stack->gap_minimal_service_security_level = security_level; 4017 } 4018 4019 void gap_set_secure_connections_only_mode(bool enable){ 4020 hci_stack->gap_secure_connections_only_mode = enable; 4021 } 4022 4023 bool gap_get_secure_connections_only_mode(void){ 4024 return hci_stack->gap_secure_connections_only_mode; 4025 } 4026 #endif 4027 4028 #ifdef ENABLE_CLASSIC 4029 void gap_set_class_of_device(uint32_t class_of_device){ 4030 hci_stack->class_of_device = class_of_device; 4031 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4032 hci_run(); 4033 } 4034 4035 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4036 hci_stack->default_link_policy_settings = default_link_policy_settings; 4037 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4038 hci_run(); 4039 } 4040 4041 void gap_set_allow_role_switch(bool allow_role_switch){ 4042 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4043 } 4044 4045 uint8_t hci_get_allow_role_switch(void){ 4046 return hci_stack->allow_role_switch; 4047 } 4048 4049 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4050 hci_stack->link_supervision_timeout = link_supervision_timeout; 4051 } 4052 4053 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4054 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4055 } 4056 4057 uint16_t hci_automatic_flush_timeout(void){ 4058 return hci_stack->automatic_flush_timeout; 4059 } 4060 4061 void hci_disable_l2cap_timeout_check(void){ 4062 disable_l2cap_timeouts = 1; 4063 } 4064 #endif 4065 4066 #ifndef HAVE_HOST_CONTROLLER_API 4067 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4068 void hci_set_bd_addr(bd_addr_t addr){ 4069 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4070 hci_stack->custom_bd_addr_set = 1; 4071 } 4072 #endif 4073 4074 // State-Module-Driver overview 4075 // state module low-level 4076 // HCI_STATE_OFF off close 4077 // HCI_STATE_INITIALIZING, on open 4078 // HCI_STATE_WORKING, on open 4079 // HCI_STATE_HALTING, on open 4080 // HCI_STATE_SLEEPING, off/sleep close 4081 // HCI_STATE_FALLING_ASLEEP on open 4082 4083 static int hci_power_control_on(void){ 4084 4085 // power on 4086 int err = 0; 4087 if (hci_stack->control && hci_stack->control->on){ 4088 err = (*hci_stack->control->on)(); 4089 } 4090 if (err){ 4091 log_error( "POWER_ON failed"); 4092 hci_emit_hci_open_failed(); 4093 return err; 4094 } 4095 4096 // int chipset driver 4097 if (hci_stack->chipset && hci_stack->chipset->init){ 4098 hci_stack->chipset->init(hci_stack->config); 4099 } 4100 4101 // init transport 4102 if (hci_stack->hci_transport->init){ 4103 hci_stack->hci_transport->init(hci_stack->config); 4104 } 4105 4106 // open transport 4107 err = hci_stack->hci_transport->open(); 4108 if (err){ 4109 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4110 if (hci_stack->control && hci_stack->control->off){ 4111 (*hci_stack->control->off)(); 4112 } 4113 hci_emit_hci_open_failed(); 4114 return err; 4115 } 4116 return 0; 4117 } 4118 4119 static void hci_power_control_off(void){ 4120 4121 log_info("hci_power_control_off"); 4122 4123 // close low-level device 4124 hci_stack->hci_transport->close(); 4125 4126 log_info("hci_power_control_off - hci_transport closed"); 4127 4128 // power off 4129 if (hci_stack->control && hci_stack->control->off){ 4130 (*hci_stack->control->off)(); 4131 } 4132 4133 log_info("hci_power_control_off - control closed"); 4134 4135 hci_stack->state = HCI_STATE_OFF; 4136 } 4137 4138 static void hci_power_control_sleep(void){ 4139 4140 log_info("hci_power_control_sleep"); 4141 4142 #if 0 4143 // don't close serial port during sleep 4144 4145 // close low-level device 4146 hci_stack->hci_transport->close(hci_stack->config); 4147 #endif 4148 4149 // sleep mode 4150 if (hci_stack->control && hci_stack->control->sleep){ 4151 (*hci_stack->control->sleep)(); 4152 } 4153 4154 hci_stack->state = HCI_STATE_SLEEPING; 4155 } 4156 4157 static int hci_power_control_wake(void){ 4158 4159 log_info("hci_power_control_wake"); 4160 4161 // wake on 4162 if (hci_stack->control && hci_stack->control->wake){ 4163 (*hci_stack->control->wake)(); 4164 } 4165 4166 #if 0 4167 // open low-level device 4168 int err = hci_stack->hci_transport->open(hci_stack->config); 4169 if (err){ 4170 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4171 if (hci_stack->control && hci_stack->control->off){ 4172 (*hci_stack->control->off)(); 4173 } 4174 hci_emit_hci_open_failed(); 4175 return err; 4176 } 4177 #endif 4178 4179 return 0; 4180 } 4181 4182 static void hci_power_enter_initializing_state(void){ 4183 // set up state machine 4184 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4185 hci_stack->hci_packet_buffer_reserved = false; 4186 hci_stack->state = HCI_STATE_INITIALIZING; 4187 hci_stack->substate = HCI_INIT_SEND_RESET; 4188 } 4189 4190 static void hci_power_enter_halting_state(void){ 4191 #ifdef ENABLE_BLE 4192 hci_whitelist_free(); 4193 #endif 4194 // see hci_run 4195 hci_stack->state = HCI_STATE_HALTING; 4196 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4197 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4198 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4199 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4200 btstack_run_loop_add_timer(&hci_stack->timeout); 4201 } 4202 4203 // returns error 4204 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4205 int err; 4206 switch (power_mode){ 4207 case HCI_POWER_ON: 4208 err = hci_power_control_on(); 4209 if (err != 0) { 4210 log_error("hci_power_control_on() error %d", err); 4211 return err; 4212 } 4213 hci_power_enter_initializing_state(); 4214 break; 4215 case HCI_POWER_OFF: 4216 // do nothing 4217 break; 4218 case HCI_POWER_SLEEP: 4219 // do nothing (with SLEEP == OFF) 4220 break; 4221 default: 4222 btstack_assert(false); 4223 break; 4224 } 4225 return ERROR_CODE_SUCCESS; 4226 } 4227 4228 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4229 switch (power_mode){ 4230 case HCI_POWER_ON: 4231 // do nothing 4232 break; 4233 case HCI_POWER_OFF: 4234 // no connections yet, just turn it off 4235 hci_power_control_off(); 4236 break; 4237 case HCI_POWER_SLEEP: 4238 // no connections yet, just turn it off 4239 hci_power_control_sleep(); 4240 break; 4241 default: 4242 btstack_assert(false); 4243 break; 4244 } 4245 return ERROR_CODE_SUCCESS; 4246 } 4247 4248 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4249 switch (power_mode){ 4250 case HCI_POWER_ON: 4251 // do nothing 4252 break; 4253 case HCI_POWER_OFF: 4254 hci_power_enter_halting_state(); 4255 break; 4256 case HCI_POWER_SLEEP: 4257 // see hci_run 4258 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4259 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4260 break; 4261 default: 4262 btstack_assert(false); 4263 break; 4264 } 4265 return ERROR_CODE_SUCCESS; 4266 } 4267 4268 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4269 switch (power_mode){ 4270 case HCI_POWER_ON: 4271 hci_power_enter_initializing_state(); 4272 break; 4273 case HCI_POWER_OFF: 4274 // do nothing 4275 break; 4276 case HCI_POWER_SLEEP: 4277 // see hci_run 4278 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4279 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4280 break; 4281 default: 4282 btstack_assert(false); 4283 break; 4284 } 4285 return ERROR_CODE_SUCCESS; 4286 } 4287 4288 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4289 switch (power_mode){ 4290 case HCI_POWER_ON: 4291 hci_power_enter_initializing_state(); 4292 break; 4293 case HCI_POWER_OFF: 4294 hci_power_enter_halting_state(); 4295 break; 4296 case HCI_POWER_SLEEP: 4297 // do nothing 4298 break; 4299 default: 4300 btstack_assert(false); 4301 break; 4302 } 4303 return ERROR_CODE_SUCCESS; 4304 } 4305 4306 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4307 int err; 4308 switch (power_mode){ 4309 case HCI_POWER_ON: 4310 err = hci_power_control_wake(); 4311 if (err) return err; 4312 hci_power_enter_initializing_state(); 4313 break; 4314 case HCI_POWER_OFF: 4315 hci_power_enter_halting_state(); 4316 break; 4317 case HCI_POWER_SLEEP: 4318 // do nothing 4319 break; 4320 default: 4321 btstack_assert(false); 4322 break; 4323 } 4324 return ERROR_CODE_SUCCESS; 4325 } 4326 4327 int hci_power_control(HCI_POWER_MODE power_mode){ 4328 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4329 int err = 0; 4330 switch (hci_stack->state){ 4331 case HCI_STATE_OFF: 4332 err = hci_power_control_state_off(power_mode); 4333 break; 4334 case HCI_STATE_INITIALIZING: 4335 err = hci_power_control_state_initializing(power_mode); 4336 break; 4337 case HCI_STATE_WORKING: 4338 err = hci_power_control_state_working(power_mode); 4339 break; 4340 case HCI_STATE_HALTING: 4341 err = hci_power_control_state_halting(power_mode); 4342 break; 4343 case HCI_STATE_FALLING_ASLEEP: 4344 err = hci_power_control_state_falling_asleep(power_mode); 4345 break; 4346 case HCI_STATE_SLEEPING: 4347 err = hci_power_control_state_sleeping(power_mode); 4348 break; 4349 default: 4350 btstack_assert(false); 4351 break; 4352 } 4353 if (err != 0){ 4354 return err; 4355 } 4356 4357 // create internal event 4358 hci_emit_state(); 4359 4360 // trigger next/first action 4361 hci_run(); 4362 4363 return 0; 4364 } 4365 4366 4367 static void hci_halting_run(void) { 4368 4369 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4370 4371 hci_connection_t *connection; 4372 #ifdef ENABLE_BLE 4373 #ifdef ENABLE_LE_PERIPHERAL 4374 bool stop_advertismenets; 4375 #endif 4376 #endif 4377 4378 switch (hci_stack->substate) { 4379 case HCI_HALTING_CLASSIC_STOP: 4380 #ifdef ENABLE_CLASSIC 4381 if (!hci_can_send_command_packet_now()) return; 4382 4383 if (hci_stack->connectable || hci_stack->discoverable){ 4384 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4385 hci_send_cmd(&hci_write_scan_enable, 0); 4386 return; 4387 } 4388 #endif 4389 /* fall through */ 4390 4391 case HCI_HALTING_LE_ADV_STOP: 4392 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4393 4394 #ifdef ENABLE_BLE 4395 #ifdef ENABLE_LE_PERIPHERAL 4396 if (!hci_can_send_command_packet_now()) return; 4397 4398 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4399 4400 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4401 if (hci_extended_advertising_supported()){ 4402 btstack_linked_list_iterator_t it; 4403 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4404 // stop all periodic advertisements and check if an extended set is active 4405 while (btstack_linked_list_iterator_has_next(&it)){ 4406 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4407 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4408 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4409 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4410 return; 4411 } 4412 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4413 stop_advertismenets = true; 4414 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4415 } 4416 } 4417 if (stop_advertismenets){ 4418 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4419 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4420 return; 4421 } 4422 } 4423 else 4424 #else 4425 { 4426 if (stop_advertismenets) { 4427 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4428 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4429 return; 4430 } 4431 } 4432 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4433 #endif /* ENABLE_LE_PERIPHERAL */ 4434 #endif /* ENABLE_BLE */ 4435 4436 /* fall through */ 4437 4438 case HCI_HALTING_LE_SCAN_STOP: 4439 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4440 if (!hci_can_send_command_packet_now()) return; 4441 4442 #ifdef ENABLE_BLE 4443 #ifdef ENABLE_LE_CENTRAL 4444 if (hci_stack->le_scanning_active){ 4445 hci_le_scan_stop(); 4446 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4447 return; 4448 } 4449 #endif 4450 #endif 4451 4452 /* fall through */ 4453 4454 case HCI_HALTING_DISCONNECT_ALL: 4455 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4456 if (!hci_can_send_command_packet_now()) return; 4457 4458 // close all open connections 4459 connection = (hci_connection_t *) hci_stack->connections; 4460 if (connection) { 4461 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4462 4463 // check state 4464 if (connection->state == SENT_DISCONNECT) return; 4465 connection->state = SENT_DISCONNECT; 4466 4467 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4468 4469 // finally, send the disconnect command 4470 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4471 return; 4472 } 4473 4474 btstack_run_loop_remove_timer(&hci_stack->timeout); 4475 4476 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4477 4478 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4479 log_info("HCI_STATE_HALTING: wait 50 ms"); 4480 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4481 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4482 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4483 btstack_run_loop_add_timer(&hci_stack->timeout); 4484 break; 4485 4486 case HCI_HALTING_CLOSE: 4487 // close left over connections (that had not been properly closed before) 4488 hci_discard_connections(); 4489 4490 log_info("HCI_STATE_HALTING, calling off"); 4491 4492 // switch mode 4493 hci_power_control_off(); 4494 4495 log_info("HCI_STATE_HALTING, emitting state"); 4496 hci_emit_state(); 4497 log_info("HCI_STATE_HALTING, done"); 4498 break; 4499 4500 case HCI_HALTING_W4_CLOSE_TIMER: 4501 // keep waiting 4502 4503 break; 4504 default: 4505 break; 4506 } 4507 }; 4508 4509 static void hci_falling_asleep_run(void){ 4510 hci_connection_t * connection; 4511 switch(hci_stack->substate) { 4512 case HCI_FALLING_ASLEEP_DISCONNECT: 4513 log_info("HCI_STATE_FALLING_ASLEEP"); 4514 // close all open connections 4515 connection = (hci_connection_t *) hci_stack->connections; 4516 if (connection){ 4517 4518 // send disconnect 4519 if (!hci_can_send_command_packet_now()) return; 4520 4521 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4522 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4523 4524 // send disconnected event right away - causes higher layer connections to get closed, too. 4525 hci_shutdown_connection(connection); 4526 return; 4527 } 4528 4529 if (hci_classic_supported()){ 4530 // disable page and inquiry scan 4531 if (!hci_can_send_command_packet_now()) return; 4532 4533 log_info("HCI_STATE_HALTING, disabling inq scans"); 4534 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4535 4536 // continue in next sub state 4537 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4538 break; 4539 } 4540 4541 /* fall through */ 4542 4543 case HCI_FALLING_ASLEEP_COMPLETE: 4544 log_info("HCI_STATE_HALTING, calling sleep"); 4545 // switch mode 4546 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4547 hci_emit_state(); 4548 break; 4549 4550 default: 4551 break; 4552 } 4553 } 4554 4555 #ifdef ENABLE_CLASSIC 4556 4557 static void hci_update_scan_enable(void){ 4558 // 2 = page scan, 1 = inq scan 4559 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4560 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4561 hci_run(); 4562 } 4563 4564 void gap_discoverable_control(uint8_t enable){ 4565 if (enable) enable = 1; // normalize argument 4566 4567 if (hci_stack->discoverable == enable){ 4568 hci_emit_discoverable_enabled(hci_stack->discoverable); 4569 return; 4570 } 4571 4572 hci_stack->discoverable = enable; 4573 hci_update_scan_enable(); 4574 } 4575 4576 void gap_connectable_control(uint8_t enable){ 4577 if (enable) enable = 1; // normalize argument 4578 4579 // don't emit event 4580 if (hci_stack->connectable == enable) return; 4581 4582 hci_stack->connectable = enable; 4583 hci_update_scan_enable(); 4584 } 4585 #endif 4586 4587 void gap_local_bd_addr(bd_addr_t address_buffer){ 4588 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4589 } 4590 4591 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4592 static void hci_host_num_completed_packets(void){ 4593 4594 // create packet manually as arrays are not supported and num_commands should not get reduced 4595 hci_reserve_packet_buffer(); 4596 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4597 4598 uint16_t size = 0; 4599 uint16_t num_handles = 0; 4600 packet[size++] = 0x35; 4601 packet[size++] = 0x0c; 4602 size++; // skip param len 4603 size++; // skip num handles 4604 4605 // add { handle, packets } entries 4606 btstack_linked_item_t * it; 4607 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4608 hci_connection_t * connection = (hci_connection_t *) it; 4609 if (connection->num_packets_completed){ 4610 little_endian_store_16(packet, size, connection->con_handle); 4611 size += 2; 4612 little_endian_store_16(packet, size, connection->num_packets_completed); 4613 size += 2; 4614 // 4615 num_handles++; 4616 connection->num_packets_completed = 0; 4617 } 4618 } 4619 4620 packet[2] = size - 3; 4621 packet[3] = num_handles; 4622 4623 hci_stack->host_completed_packets = 0; 4624 4625 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4626 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4627 4628 // release packet buffer for synchronous transport implementations 4629 if (hci_transport_synchronous()){ 4630 hci_release_packet_buffer(); 4631 hci_emit_transport_packet_sent(); 4632 } 4633 } 4634 #endif 4635 4636 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4637 UNUSED(ds); 4638 hci_stack->substate = HCI_HALTING_CLOSE; 4639 // allow packet handlers to defer final shutdown 4640 hci_emit_state(); 4641 hci_run(); 4642 } 4643 4644 static bool hci_run_acl_fragments(void){ 4645 if (hci_stack->acl_fragmentation_total_size > 0u) { 4646 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4647 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4648 if (connection) { 4649 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4650 hci_send_acl_packet_fragments(connection); 4651 return true; 4652 } 4653 } else { 4654 // connection gone -> discard further fragments 4655 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4656 hci_stack->acl_fragmentation_total_size = 0; 4657 hci_stack->acl_fragmentation_pos = 0; 4658 } 4659 } 4660 return false; 4661 } 4662 4663 #ifdef ENABLE_CLASSIC 4664 4665 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4666 static bool hci_classic_operation_active(void) { 4667 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4668 return true; 4669 } 4670 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4671 return true; 4672 } 4673 btstack_linked_item_t * it; 4674 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4675 hci_connection_t *connection = (hci_connection_t *) it; 4676 switch (connection->state) { 4677 case SENT_CREATE_CONNECTION: 4678 case SENT_CANCEL_CONNECTION: 4679 case SENT_DISCONNECT: 4680 return true; 4681 default: 4682 break; 4683 } 4684 } 4685 return false; 4686 } 4687 #endif 4688 4689 static bool hci_run_general_gap_classic(void){ 4690 4691 // assert stack is working and classic is active 4692 if (hci_classic_supported() == false) return false; 4693 if (hci_stack->state != HCI_STATE_WORKING) return false; 4694 4695 // decline incoming connections 4696 if (hci_stack->decline_reason){ 4697 uint8_t reason = hci_stack->decline_reason; 4698 hci_stack->decline_reason = 0; 4699 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4700 return true; 4701 } 4702 4703 if (hci_stack->gap_tasks_classic != 0){ 4704 hci_run_gap_tasks_classic(); 4705 return true; 4706 } 4707 4708 // start/stop inquiry 4709 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4710 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4711 if (hci_classic_operation_active() == false) 4712 #endif 4713 { 4714 uint8_t duration = hci_stack->inquiry_state; 4715 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4716 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4717 return true; 4718 } 4719 } 4720 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4721 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4722 hci_send_cmd(&hci_inquiry_cancel); 4723 return true; 4724 } 4725 // remote name request 4726 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4727 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4728 if (hci_classic_operation_active() == false) 4729 #endif 4730 { 4731 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4732 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4733 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4734 return true; 4735 } 4736 } 4737 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4738 // Local OOB data 4739 if (hci_stack->classic_read_local_oob_data){ 4740 hci_stack->classic_read_local_oob_data = false; 4741 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4742 hci_send_cmd(&hci_read_local_extended_oob_data); 4743 } else { 4744 hci_send_cmd(&hci_read_local_oob_data); 4745 } 4746 } 4747 #endif 4748 // pairing 4749 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4750 uint8_t state = hci_stack->gap_pairing_state; 4751 uint8_t pin_code[16]; 4752 switch (state){ 4753 case GAP_PAIRING_STATE_SEND_PIN: 4754 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4755 memset(pin_code, 0, 16); 4756 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4757 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4758 break; 4759 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4760 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4761 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4762 break; 4763 case GAP_PAIRING_STATE_SEND_PASSKEY: 4764 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4765 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4766 break; 4767 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4768 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4769 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4770 break; 4771 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4772 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4773 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4774 break; 4775 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4776 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4777 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4778 break; 4779 default: 4780 break; 4781 } 4782 return true; 4783 } 4784 return false; 4785 } 4786 #endif 4787 4788 #ifdef ENABLE_BLE 4789 4790 #ifdef ENABLE_LE_CENTRAL 4791 static void hci_le_scan_stop(void){ 4792 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4793 if (hci_extended_advertising_supported()) { 4794 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4795 } else 4796 #endif 4797 { 4798 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4799 } 4800 } 4801 #endif 4802 4803 #ifdef ENABLE_LE_PERIPHERAL 4804 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4805 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4806 uint8_t operation = 0; 4807 if (pos == 0){ 4808 // first fragment or complete data 4809 operation |= 1; 4810 } 4811 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4812 // last fragment or complete data 4813 operation |= 2; 4814 } 4815 return operation; 4816 } 4817 #endif 4818 #endif 4819 4820 static bool hci_run_general_gap_le(void){ 4821 4822 // Phase 1: collect what to stop 4823 4824 bool scanning_stop = false; 4825 bool connecting_stop = false; 4826 bool advertising_stop = false; 4827 4828 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4829 le_advertising_set_t * advertising_stop_set = NULL; 4830 bool periodic_stop = false; 4831 #endif 4832 4833 #ifndef ENABLE_LE_CENTRAL 4834 UNUSED(scanning_stop); 4835 UNUSED(connecting_stop); 4836 #endif 4837 #ifndef ENABLE_LE_PERIPHERAL 4838 UNUSED(advertising_stop); 4839 #endif 4840 4841 // check if own address changes 4842 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4843 4844 // check if whitelist needs modification 4845 bool whitelist_modification_pending = false; 4846 btstack_linked_list_iterator_t lit; 4847 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4848 while (btstack_linked_list_iterator_has_next(&lit)){ 4849 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4850 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4851 whitelist_modification_pending = true; 4852 break; 4853 } 4854 } 4855 // check if resolving list needs modification 4856 bool resolving_list_modification_pending = false; 4857 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4858 4859 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4860 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4861 resolving_list_modification_pending = true; 4862 } 4863 #endif 4864 4865 #ifdef ENABLE_LE_CENTRAL 4866 // scanning control 4867 if (hci_stack->le_scanning_active) { 4868 // stop if: 4869 // - parameter change required 4870 // - it's disabled 4871 // - whitelist change required but used for scanning 4872 // - resolving list modified 4873 // - own address changes 4874 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4875 if ((hci_stack->le_scanning_param_update) || 4876 !hci_stack->le_scanning_enabled || 4877 (scanning_uses_whitelist && whitelist_modification_pending) || 4878 resolving_list_modification_pending || 4879 random_address_change){ 4880 4881 scanning_stop = true; 4882 } 4883 } 4884 #endif 4885 4886 #ifdef ENABLE_LE_CENTRAL 4887 // connecting control 4888 bool connecting_with_whitelist; 4889 switch (hci_stack->le_connecting_state){ 4890 case LE_CONNECTING_DIRECT: 4891 case LE_CONNECTING_WHITELIST: 4892 // stop connecting if: 4893 // - connecting uses white and whitelist modification pending 4894 // - if it got disabled 4895 // - resolving list modified 4896 // - own address changes 4897 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4898 if ((connecting_with_whitelist && whitelist_modification_pending) || 4899 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4900 resolving_list_modification_pending || 4901 random_address_change) { 4902 4903 connecting_stop = true; 4904 } 4905 break; 4906 default: 4907 break; 4908 } 4909 #endif 4910 4911 #ifdef ENABLE_LE_PERIPHERAL 4912 // le advertisement control 4913 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4914 // stop if: 4915 // - parameter change required 4916 // - random address used in advertising and changes 4917 // - it's disabled 4918 // - whitelist change required but used for advertisement filter policy 4919 // - resolving list modified 4920 // - own address changes 4921 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4922 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4923 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4924 if (advertising_change || 4925 (advertising_uses_random_address && random_address_change) || 4926 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4927 (advertising_uses_whitelist && whitelist_modification_pending) || 4928 resolving_list_modification_pending || 4929 random_address_change) { 4930 4931 advertising_stop = true; 4932 } 4933 } 4934 4935 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4936 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4937 btstack_linked_list_iterator_t it; 4938 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4939 while (btstack_linked_list_iterator_has_next(&it)){ 4940 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4941 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4942 // stop if: 4943 // - parameter change required 4944 // - random address used in connectable advertising and changes 4945 // - it's disabled 4946 // - whitelist change required but used for advertisement filter policy 4947 // - resolving list modified 4948 // - own address changes 4949 // - advertisement set will be removed 4950 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4951 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4952 bool advertising_uses_random_address = 4953 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 4954 advertising_connectable; 4955 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4956 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4957 bool advertising_set_random_address_change = 4958 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4959 bool advertising_set_will_be_removed = 4960 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4961 if (advertising_parameter_change || 4962 (advertising_uses_random_address && advertising_set_random_address_change) || 4963 (advertising_enabled == false) || 4964 (advertising_uses_whitelist && whitelist_modification_pending) || 4965 resolving_list_modification_pending || 4966 advertising_set_will_be_removed) { 4967 4968 advertising_stop = true; 4969 advertising_stop_set = advertising_set; 4970 break; 4971 } 4972 } 4973 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4974 // stop if: 4975 // - it's disabled 4976 // - parameter change required 4977 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 4978 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 4979 if ((periodic_enabled == false) || periodic_parameter_change){ 4980 periodic_stop = true; 4981 advertising_stop_set = advertising_set; 4982 } 4983 } 4984 } 4985 } 4986 #endif 4987 4988 #endif 4989 4990 4991 // Phase 2: stop everything that should be off during modifications 4992 4993 #ifdef ENABLE_LE_CENTRAL 4994 if (scanning_stop){ 4995 hci_stack->le_scanning_active = false; 4996 hci_le_scan_stop(); 4997 return true; 4998 } 4999 #endif 5000 5001 #ifdef ENABLE_LE_CENTRAL 5002 if (connecting_stop){ 5003 hci_send_cmd(&hci_le_create_connection_cancel); 5004 return true; 5005 } 5006 #endif 5007 5008 #ifdef ENABLE_LE_PERIPHERAL 5009 if (advertising_stop){ 5010 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5011 if (hci_extended_advertising_supported()) { 5012 uint8_t advertising_stop_handle; 5013 if (advertising_stop_set != NULL){ 5014 advertising_stop_handle = advertising_stop_set->advertising_handle; 5015 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5016 } else { 5017 advertising_stop_handle = 0; 5018 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5019 } 5020 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5021 const uint16_t durations[] = { 0 }; 5022 const uint16_t max_events[] = { 0 }; 5023 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5024 } else 5025 #endif 5026 { 5027 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5028 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5029 } 5030 return true; 5031 } 5032 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5033 if (periodic_stop){ 5034 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5035 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5036 return true; 5037 } 5038 #endif 5039 #endif 5040 5041 // Phase 3: modify 5042 5043 if (random_address_change){ 5044 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5045 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5046 if (hci_extended_advertising_supported()) { 5047 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5048 } 5049 #endif 5050 { 5051 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5052 } 5053 return true; 5054 } 5055 5056 #ifdef ENABLE_LE_CENTRAL 5057 if (hci_stack->le_scanning_param_update){ 5058 hci_stack->le_scanning_param_update = false; 5059 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5060 if (hci_extended_advertising_supported()){ 5061 // prepare arrays for all PHYs 5062 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5063 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5064 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5065 uint8_t scanning_phys = 1; // LE 1M PHY 5066 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5067 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5068 } else 5069 #endif 5070 { 5071 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5072 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5073 } 5074 return true; 5075 } 5076 #endif 5077 5078 #ifdef ENABLE_LE_PERIPHERAL 5079 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5080 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5081 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5082 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5083 if (hci_extended_advertising_supported()){ 5084 // map advertisment type to advertising event properties 5085 uint16_t adv_event_properties = 0; 5086 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5087 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5088 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5089 } 5090 hci_stack->le_advertising_set_in_current_command = 0; 5091 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5092 0, 5093 adv_event_properties, 5094 hci_stack->le_advertisements_interval_min, 5095 hci_stack->le_advertisements_interval_max, 5096 hci_stack->le_advertisements_channel_map, 5097 hci_stack->le_advertisements_own_addr_type, 5098 hci_stack->le_advertisements_direct_address_type, 5099 hci_stack->le_advertisements_direct_address, 5100 hci_stack->le_advertisements_filter_policy, 5101 0x7f, // tx power: no preference 5102 0x01, // primary adv phy: LE 1M 5103 0, // secondary adv max skip 5104 0, // secondary adv phy 5105 0, // adv sid 5106 0 // scan request notification 5107 ); 5108 } 5109 #endif 5110 { 5111 hci_send_cmd(&hci_le_set_advertising_parameters, 5112 hci_stack->le_advertisements_interval_min, 5113 hci_stack->le_advertisements_interval_max, 5114 hci_stack->le_advertisements_type, 5115 hci_stack->le_advertisements_own_addr_type, 5116 hci_stack->le_advertisements_direct_address_type, 5117 hci_stack->le_advertisements_direct_address, 5118 hci_stack->le_advertisements_channel_map, 5119 hci_stack->le_advertisements_filter_policy); 5120 } 5121 return true; 5122 } 5123 5124 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5125 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5126 uint8_t adv_data_clean[31]; 5127 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5128 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5129 hci_stack->le_advertisements_data_len); 5130 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5131 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5132 if (hci_extended_advertising_supported()){ 5133 hci_stack->le_advertising_set_in_current_command = 0; 5134 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5135 } else 5136 #endif 5137 { 5138 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5139 } 5140 return true; 5141 } 5142 5143 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5144 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5145 uint8_t scan_data_clean[31]; 5146 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5147 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5148 hci_stack->le_scan_response_data_len); 5149 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5150 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5151 if (hci_extended_advertising_supported()){ 5152 hci_stack->le_advertising_set_in_current_command = 0; 5153 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5154 } else 5155 #endif 5156 { 5157 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5158 } 5159 return true; 5160 } 5161 5162 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5163 if (hci_extended_advertising_supported()) { 5164 btstack_linked_list_iterator_t it; 5165 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5166 while (btstack_linked_list_iterator_has_next(&it)){ 5167 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5168 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5169 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5170 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5171 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5172 return true; 5173 } 5174 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5175 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5176 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5177 return true; 5178 } 5179 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5180 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5181 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5182 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5183 advertising_set->advertising_handle, 5184 advertising_set->extended_params.advertising_event_properties, 5185 advertising_set->extended_params.primary_advertising_interval_min, 5186 advertising_set->extended_params.primary_advertising_interval_max, 5187 advertising_set->extended_params.primary_advertising_channel_map, 5188 advertising_set->extended_params.own_address_type, 5189 advertising_set->extended_params.peer_address_type, 5190 advertising_set->extended_params.peer_address, 5191 advertising_set->extended_params.advertising_filter_policy, 5192 advertising_set->extended_params.advertising_tx_power, 5193 advertising_set->extended_params.primary_advertising_phy, 5194 advertising_set->extended_params.secondary_advertising_max_skip, 5195 advertising_set->extended_params.secondary_advertising_phy, 5196 advertising_set->extended_params.advertising_sid, 5197 advertising_set->extended_params.scan_request_notification_enable 5198 ); 5199 return true; 5200 } 5201 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5202 uint16_t pos = advertising_set->adv_data_pos; 5203 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5204 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5205 if ((operation & 0x02) != 0){ 5206 // last fragment or complete data 5207 operation |= 2; 5208 advertising_set->adv_data_pos = 0; 5209 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5210 } else { 5211 advertising_set->adv_data_pos += data_to_upload; 5212 } 5213 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5214 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5215 return true; 5216 } 5217 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5218 uint16_t pos = advertising_set->scan_data_pos; 5219 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5220 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5221 if ((operation & 0x02) != 0){ 5222 advertising_set->scan_data_pos = 0; 5223 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5224 } else { 5225 advertising_set->scan_data_pos += data_to_upload; 5226 } 5227 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5228 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5229 return true; 5230 } 5231 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5232 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5233 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5234 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5235 advertising_set->advertising_handle, 5236 advertising_set->periodic_params.periodic_advertising_interval_min, 5237 advertising_set->periodic_params.periodic_advertising_interval_max, 5238 advertising_set->periodic_params.periodic_advertising_properties); 5239 return true; 5240 } 5241 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5242 uint16_t pos = advertising_set->periodic_data_pos; 5243 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5244 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5245 if ((operation & 0x02) != 0){ 5246 // last fragment or complete data 5247 operation |= 2; 5248 advertising_set->periodic_data_pos = 0; 5249 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5250 } else { 5251 advertising_set->periodic_data_pos += data_to_upload; 5252 } 5253 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5254 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5255 return true; 5256 } 5257 } 5258 } 5259 #endif 5260 5261 5262 #endif 5263 5264 5265 #ifdef ENABLE_LE_CENTRAL 5266 // if connect with whitelist was active and is not cancelled yet, wait until next time 5267 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5268 #endif 5269 5270 // LE Whitelist Management 5271 if (whitelist_modification_pending){ 5272 // add/remove entries 5273 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5274 while (btstack_linked_list_iterator_has_next(&lit)){ 5275 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5276 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5277 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5278 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5279 return true; 5280 } 5281 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5282 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5283 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5284 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5285 return true; 5286 } 5287 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5288 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5289 btstack_memory_whitelist_entry_free(entry); 5290 } 5291 } 5292 } 5293 5294 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5295 // LE Resolving List Management 5296 if (resolving_list_supported) { 5297 uint16_t i; 5298 switch (hci_stack->le_resolving_list_state) { 5299 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5300 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5301 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5302 return true; 5303 case LE_RESOLVING_LIST_READ_SIZE: 5304 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5305 hci_send_cmd(&hci_le_read_resolving_list_size); 5306 return true; 5307 case LE_RESOLVING_LIST_SEND_CLEAR: 5308 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5309 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5310 sizeof(hci_stack->le_resolving_list_add_entries)); 5311 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5312 sizeof(hci_stack->le_resolving_list_remove_entries)); 5313 hci_send_cmd(&hci_le_clear_resolving_list); 5314 return true; 5315 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5316 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5317 uint8_t offset = i >> 3; 5318 uint8_t mask = 1 << (i & 7); 5319 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5320 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5321 bd_addr_t peer_identity_addreses; 5322 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5323 sm_key_t peer_irk; 5324 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5325 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5326 5327 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5328 // trigger whitelist entry 'update' (work around for controller bug) 5329 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5330 while (btstack_linked_list_iterator_has_next(&lit)) { 5331 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5332 if (entry->address_type != peer_identity_addr_type) continue; 5333 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5334 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5335 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5336 } 5337 #endif 5338 5339 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5340 peer_identity_addreses); 5341 return true; 5342 } 5343 5344 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5345 5346 /* fall through */ 5347 5348 case LE_RESOLVING_LIST_ADD_ENTRIES: 5349 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5350 uint8_t offset = i >> 3; 5351 uint8_t mask = 1 << (i & 7); 5352 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5353 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5354 bd_addr_t peer_identity_addreses; 5355 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5356 sm_key_t peer_irk; 5357 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5358 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5359 const uint8_t *local_irk = gap_get_persistent_irk(); 5360 // command uses format specifier 'P' that stores 16-byte value without flip 5361 uint8_t local_irk_flipped[16]; 5362 uint8_t peer_irk_flipped[16]; 5363 reverse_128(local_irk, local_irk_flipped); 5364 reverse_128(peer_irk, peer_irk_flipped); 5365 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5366 peer_irk_flipped, local_irk_flipped); 5367 return true; 5368 } 5369 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5370 break; 5371 5372 default: 5373 break; 5374 } 5375 } 5376 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5377 #endif 5378 5379 // post-pone all actions until stack is fully working 5380 if (hci_stack->state != HCI_STATE_WORKING) return false; 5381 5382 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5383 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5384 5385 // Phase 4: restore state 5386 5387 #ifdef ENABLE_LE_CENTRAL 5388 // re-start scanning 5389 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5390 hci_stack->le_scanning_active = true; 5391 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5392 if (hci_extended_advertising_supported()){ 5393 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5394 } else 5395 #endif 5396 { 5397 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5398 } 5399 return true; 5400 } 5401 #endif 5402 5403 #ifdef ENABLE_LE_CENTRAL 5404 // re-start connecting 5405 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5406 bd_addr_t null_addr; 5407 memset(null_addr, 0, 6); 5408 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5409 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5410 hci_send_cmd(&hci_le_create_connection, 5411 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5412 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5413 1, // use whitelist 5414 0, // peer address type 5415 null_addr, // peer bd addr 5416 hci_stack->le_connection_own_addr_type, // our addr type: 5417 hci_stack->le_connection_interval_min, // conn interval min 5418 hci_stack->le_connection_interval_max, // conn interval max 5419 hci_stack->le_connection_latency, // conn latency 5420 hci_stack->le_supervision_timeout, // conn latency 5421 hci_stack->le_minimum_ce_length, // min ce length 5422 hci_stack->le_maximum_ce_length // max ce length 5423 ); 5424 return true; 5425 } 5426 #endif 5427 5428 #ifdef ENABLE_LE_PERIPHERAL 5429 // re-start advertising 5430 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5431 // check if advertisements should be enabled given 5432 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5433 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5434 5435 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5436 if (hci_extended_advertising_supported()){ 5437 const uint8_t advertising_handles[] = { 0 }; 5438 const uint16_t durations[] = { 0 }; 5439 const uint16_t max_events[] = { 0 }; 5440 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5441 } else 5442 #endif 5443 { 5444 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5445 } 5446 return true; 5447 } 5448 5449 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5450 if (hci_extended_advertising_supported()) { 5451 btstack_linked_list_iterator_t it; 5452 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5453 while (btstack_linked_list_iterator_has_next(&it)) { 5454 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5455 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5456 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5457 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5458 const uint16_t durations[] = { advertising_set->enable_timeout }; 5459 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5460 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5461 return true; 5462 } 5463 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5464 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5465 uint8_t enable = 1; 5466 if (advertising_set->periodic_include_adi){ 5467 enable |= 2; 5468 } 5469 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5470 return true; 5471 } 5472 } 5473 } 5474 #endif 5475 #endif 5476 5477 return false; 5478 } 5479 #endif 5480 5481 static bool hci_run_general_pending_commands(void){ 5482 btstack_linked_item_t * it; 5483 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5484 hci_connection_t * connection = (hci_connection_t *) it; 5485 5486 switch(connection->state){ 5487 case SEND_CREATE_CONNECTION: 5488 switch(connection->address_type){ 5489 #ifdef ENABLE_CLASSIC 5490 case BD_ADDR_TYPE_ACL: 5491 log_info("sending hci_create_connection"); 5492 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5493 break; 5494 #endif 5495 default: 5496 #ifdef ENABLE_BLE 5497 #ifdef ENABLE_LE_CENTRAL 5498 log_info("sending hci_le_create_connection"); 5499 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5500 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5501 hci_send_cmd(&hci_le_create_connection, 5502 hci_stack->le_connection_scan_interval, // conn scan interval 5503 hci_stack->le_connection_scan_window, // conn scan windows 5504 0, // don't use whitelist 5505 connection->address_type, // peer address type 5506 connection->address, // peer bd addr 5507 hci_stack->le_connection_own_addr_type, // our addr type: 5508 hci_stack->le_connection_interval_min, // conn interval min 5509 hci_stack->le_connection_interval_max, // conn interval max 5510 hci_stack->le_connection_latency, // conn latency 5511 hci_stack->le_supervision_timeout, // conn latency 5512 hci_stack->le_minimum_ce_length, // min ce length 5513 hci_stack->le_maximum_ce_length // max ce length 5514 ); 5515 connection->state = SENT_CREATE_CONNECTION; 5516 #endif 5517 #endif 5518 break; 5519 } 5520 return true; 5521 5522 #ifdef ENABLE_CLASSIC 5523 case RECEIVED_CONNECTION_REQUEST: 5524 connection->role = HCI_ROLE_SLAVE; 5525 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5526 log_info("sending hci_accept_connection_request"); 5527 connection->state = ACCEPTED_CONNECTION_REQUEST; 5528 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5529 return true; 5530 } 5531 break; 5532 #endif 5533 5534 #ifdef ENABLE_BLE 5535 #ifdef ENABLE_LE_CENTRAL 5536 case SEND_CANCEL_CONNECTION: 5537 connection->state = SENT_CANCEL_CONNECTION; 5538 hci_send_cmd(&hci_le_create_connection_cancel); 5539 return true; 5540 #endif 5541 #endif 5542 case SEND_DISCONNECT: 5543 connection->state = SENT_DISCONNECT; 5544 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5545 return true; 5546 5547 default: 5548 break; 5549 } 5550 5551 // no further commands if connection is about to get shut down 5552 if (connection->state == SENT_DISCONNECT) continue; 5553 5554 #ifdef ENABLE_CLASSIC 5555 5556 // Handling link key request requires remote supported features 5557 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5558 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5559 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5560 5561 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5562 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5563 if (have_link_key && security_level_sufficient){ 5564 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5565 } else { 5566 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5567 } 5568 return true; 5569 } 5570 5571 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5572 log_info("denying to pin request"); 5573 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5574 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5575 return true; 5576 } 5577 5578 // security assessment requires remote features 5579 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5580 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5581 hci_ssp_assess_security_on_io_cap_request(connection); 5582 // 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 5583 } 5584 5585 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5586 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5587 // set authentication requirements: 5588 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5589 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5590 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5591 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5592 authreq |= 1; 5593 } 5594 bool bonding = hci_stack->bondable; 5595 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5596 // if we have received IO Cap Response, we're in responder role 5597 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5598 if (bonding && !remote_bonding){ 5599 log_info("Remote not bonding, dropping local flag"); 5600 bonding = false; 5601 } 5602 } 5603 if (bonding){ 5604 if (connection->bonding_flags & BONDING_DEDICATED){ 5605 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5606 } else { 5607 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5608 } 5609 } 5610 uint8_t have_oob_data = 0; 5611 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5612 if (connection->classic_oob_c_192 != NULL){ 5613 have_oob_data |= 1; 5614 } 5615 if (connection->classic_oob_c_256 != NULL){ 5616 have_oob_data |= 2; 5617 } 5618 #endif 5619 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5620 return true; 5621 } 5622 5623 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5624 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5625 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5626 return true; 5627 } 5628 5629 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5630 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5631 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5632 const uint8_t zero[16] = { 0 }; 5633 const uint8_t * r_192 = zero; 5634 const uint8_t * c_192 = zero; 5635 const uint8_t * r_256 = zero; 5636 const uint8_t * c_256 = zero; 5637 // verify P-256 OOB 5638 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5639 c_256 = connection->classic_oob_c_256; 5640 if (connection->classic_oob_r_256 != NULL) { 5641 r_256 = connection->classic_oob_r_256; 5642 } 5643 } 5644 // verify P-192 OOB 5645 if ((connection->classic_oob_c_192 != NULL)) { 5646 c_192 = connection->classic_oob_c_192; 5647 if (connection->classic_oob_r_192 != NULL) { 5648 r_192 = connection->classic_oob_r_192; 5649 } 5650 } 5651 5652 // assess security 5653 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5654 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5655 if (need_level_4 && !can_reach_level_4){ 5656 log_info("Level 4 required, but not possible -> abort"); 5657 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5658 // send oob negative reply 5659 c_256 = NULL; 5660 c_192 = NULL; 5661 } 5662 5663 // Reply 5664 if (c_256 != zero) { 5665 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5666 } else if (c_192 != zero){ 5667 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5668 } else { 5669 hci_stack->classic_oob_con_handle = connection->con_handle; 5670 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5671 } 5672 return true; 5673 } 5674 #endif 5675 5676 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5677 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5678 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5679 return true; 5680 } 5681 5682 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5683 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5684 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5685 return true; 5686 } 5687 5688 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5689 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5690 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5691 return true; 5692 } 5693 5694 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5695 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5696 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5697 connection->state = SENT_DISCONNECT; 5698 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5699 return true; 5700 } 5701 5702 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5703 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5704 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5705 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5706 return true; 5707 } 5708 5709 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5710 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5711 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5712 return true; 5713 } 5714 5715 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5716 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5717 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5718 return true; 5719 } 5720 5721 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5722 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5723 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5724 return true; 5725 } 5726 5727 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5728 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5729 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5730 return true; 5731 } 5732 5733 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5734 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5735 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5736 return true; 5737 } 5738 #endif 5739 5740 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5741 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5742 #ifdef ENABLE_CLASSIC 5743 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5744 #endif 5745 if (connection->state != SENT_DISCONNECT){ 5746 connection->state = SENT_DISCONNECT; 5747 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5748 return true; 5749 } 5750 } 5751 5752 #ifdef ENABLE_CLASSIC 5753 uint16_t sniff_min_interval; 5754 switch (connection->sniff_min_interval){ 5755 case 0: 5756 break; 5757 case 0xffff: 5758 connection->sniff_min_interval = 0; 5759 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5760 return true; 5761 default: 5762 sniff_min_interval = connection->sniff_min_interval; 5763 connection->sniff_min_interval = 0; 5764 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5765 return true; 5766 } 5767 5768 if (connection->sniff_subrating_max_latency != 0xffff){ 5769 uint16_t max_latency = connection->sniff_subrating_max_latency; 5770 connection->sniff_subrating_max_latency = 0; 5771 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5772 return true; 5773 } 5774 5775 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5776 uint8_t service_type = (uint8_t) connection->qos_service_type; 5777 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5778 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); 5779 return true; 5780 } 5781 5782 if (connection->request_role != HCI_ROLE_INVALID){ 5783 hci_role_t role = connection->request_role; 5784 connection->request_role = HCI_ROLE_INVALID; 5785 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5786 return true; 5787 } 5788 #endif 5789 5790 if (connection->gap_connection_tasks != 0){ 5791 #ifdef ENABLE_CLASSIC 5792 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 5793 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 5794 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 5795 return true; 5796 } 5797 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 5798 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 5799 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5800 return true; 5801 } 5802 #endif 5803 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 5804 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 5805 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5806 return true; 5807 } 5808 } 5809 5810 #ifdef ENABLE_BLE 5811 switch (connection->le_con_parameter_update_state){ 5812 // response to L2CAP CON PARAMETER UPDATE REQUEST 5813 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5814 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5815 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5816 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5817 0x0000, 0xffff); 5818 return true; 5819 case CON_PARAMETER_UPDATE_REPLY: 5820 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5821 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5822 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5823 0x0000, 0xffff); 5824 return true; 5825 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5826 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5827 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5828 return true; 5829 default: 5830 break; 5831 } 5832 if (connection->le_phy_update_all_phys != 0xffu){ 5833 uint8_t all_phys = connection->le_phy_update_all_phys; 5834 connection->le_phy_update_all_phys = 0xff; 5835 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); 5836 return true; 5837 } 5838 #endif 5839 } 5840 return false; 5841 } 5842 5843 static void hci_run(void){ 5844 5845 // stack state sub statemachines 5846 // halting needs to be called even if we cannot send command packet now 5847 switch (hci_stack->state) { 5848 case HCI_STATE_INITIALIZING: 5849 hci_initializing_run(); 5850 break; 5851 case HCI_STATE_HALTING: 5852 hci_halting_run(); 5853 break; 5854 case HCI_STATE_FALLING_ASLEEP: 5855 hci_falling_asleep_run(); 5856 break; 5857 default: 5858 break; 5859 } 5860 5861 bool done; 5862 5863 // send continuation fragments first, as they block the prepared packet buffer 5864 done = hci_run_acl_fragments(); 5865 if (done) return; 5866 5867 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5868 // send host num completed packets next as they don't require num_cmd_packets > 0 5869 if (!hci_can_send_comand_packet_transport()) return; 5870 if (hci_stack->host_completed_packets){ 5871 hci_host_num_completed_packets(); 5872 return; 5873 } 5874 #endif 5875 5876 if (!hci_can_send_command_packet_now()) return; 5877 5878 // global/non-connection oriented commands 5879 5880 5881 #ifdef ENABLE_CLASSIC 5882 // general gap classic 5883 done = hci_run_general_gap_classic(); 5884 if (done) return; 5885 #endif 5886 5887 #ifdef ENABLE_BLE 5888 // general gap le 5889 done = hci_run_general_gap_le(); 5890 if (done) return; 5891 #endif 5892 5893 // send pending HCI commands 5894 hci_run_general_pending_commands(); 5895 } 5896 5897 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5898 // house-keeping 5899 5900 #ifdef ENABLE_CLASSIC 5901 bd_addr_t addr; 5902 hci_connection_t * conn; 5903 #endif 5904 #ifdef ENABLE_LE_CENTRAL 5905 uint8_t initiator_filter_policy; 5906 #endif 5907 5908 uint16_t opcode = little_endian_read_16(packet, 0); 5909 switch (opcode) { 5910 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5911 hci_stack->loopback_mode = packet[3]; 5912 break; 5913 5914 #ifdef ENABLE_CLASSIC 5915 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5916 reverse_bd_addr(&packet[3], addr); 5917 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5918 5919 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5920 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5921 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5922 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5923 } 5924 5925 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5926 if (!conn) { 5927 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5928 if (!conn) { 5929 // notify client that alloc failed 5930 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5931 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5932 } 5933 conn->state = SEND_CREATE_CONNECTION; 5934 conn->role = HCI_ROLE_MASTER; 5935 } 5936 5937 conn->con_handle = HCI_CON_HANDLE_INVALID; 5938 conn->role = HCI_ROLE_INVALID; 5939 5940 log_info("conn state %u", conn->state); 5941 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5942 switch (conn->state) { 5943 // if connection active exists 5944 case OPEN: 5945 // and OPEN, emit connection complete command 5946 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5947 // packet not sent to controller 5948 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5949 case RECEIVED_DISCONNECTION_COMPLETE: 5950 // create connection triggered in disconnect complete event, let's do it now 5951 break; 5952 case SEND_CREATE_CONNECTION: 5953 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5954 if (hci_classic_operation_active()){ 5955 return ERROR_CODE_SUCCESS; 5956 } 5957 #endif 5958 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5959 break; 5960 default: 5961 // otherwise, just ignore as it is already in the open process 5962 // packet not sent to controller 5963 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5964 } 5965 conn->state = SENT_CREATE_CONNECTION; 5966 5967 // track outgoing connection 5968 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5969 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5970 break; 5971 5972 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5973 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5974 // setup_synchronous_connection? Voice setting at offset 22 5975 // TODO: compare to current setting if sco connection already active 5976 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5977 break; 5978 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5979 // accept_synchronous_connection? Voice setting at offset 18 5980 // TODO: compare to current setting if sco connection already active 5981 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5982 // track outgoing connection 5983 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5984 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5985 break; 5986 #endif 5987 #endif 5988 5989 #ifdef ENABLE_BLE 5990 #ifdef ENABLE_LE_CENTRAL 5991 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5992 // white list used? 5993 initiator_filter_policy = packet[7]; 5994 switch (initiator_filter_policy) { 5995 case 0: 5996 // whitelist not used 5997 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5998 break; 5999 case 1: 6000 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6001 break; 6002 default: 6003 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6004 break; 6005 } 6006 // track outgoing connection 6007 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6008 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6009 break; 6010 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6011 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6012 break; 6013 #endif 6014 #endif 6015 default: 6016 break; 6017 } 6018 6019 hci_stack->num_cmd_packets--; 6020 6021 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6022 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6023 if (err != 0){ 6024 return ERROR_CODE_HARDWARE_FAILURE; 6025 } 6026 return ERROR_CODE_SUCCESS; 6027 } 6028 6029 // disconnect because of security block 6030 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6031 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6032 if (!connection) return; 6033 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6034 } 6035 6036 6037 // Configure Secure Simple Pairing 6038 6039 #ifdef ENABLE_CLASSIC 6040 6041 // enable will enable SSP during init 6042 void gap_ssp_set_enable(int enable){ 6043 hci_stack->ssp_enable = enable; 6044 } 6045 6046 static int hci_local_ssp_activated(void){ 6047 return gap_ssp_supported() && hci_stack->ssp_enable; 6048 } 6049 6050 // if set, BTstack will respond to io capability request using authentication requirement 6051 void gap_ssp_set_io_capability(int io_capability){ 6052 hci_stack->ssp_io_capability = io_capability; 6053 } 6054 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6055 hci_stack->ssp_authentication_requirement = authentication_requirement; 6056 } 6057 6058 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6059 void gap_ssp_set_auto_accept(int auto_accept){ 6060 hci_stack->ssp_auto_accept = auto_accept; 6061 } 6062 6063 void gap_secure_connections_enable(bool enable){ 6064 hci_stack->secure_connections_enable = enable; 6065 } 6066 bool gap_secure_connections_active(void){ 6067 return hci_stack->secure_connections_active; 6068 } 6069 6070 #endif 6071 6072 // va_list part of hci_send_cmd 6073 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6074 if (!hci_can_send_command_packet_now()){ 6075 log_error("hci_send_cmd called but cannot send packet now"); 6076 return ERROR_CODE_COMMAND_DISALLOWED; 6077 } 6078 6079 // for HCI INITIALIZATION 6080 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6081 hci_stack->last_cmd_opcode = cmd->opcode; 6082 6083 hci_reserve_packet_buffer(); 6084 uint8_t * packet = hci_stack->hci_packet_buffer; 6085 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6086 uint8_t status = hci_send_cmd_packet(packet, size); 6087 6088 // release packet buffer on error or for synchronous transport implementations 6089 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6090 hci_release_packet_buffer(); 6091 hci_emit_transport_packet_sent(); 6092 } 6093 6094 return status; 6095 } 6096 6097 /** 6098 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6099 */ 6100 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6101 va_list argptr; 6102 va_start(argptr, cmd); 6103 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6104 va_end(argptr); 6105 return status; 6106 } 6107 6108 // Create various non-HCI events. 6109 // TODO: generalize, use table similar to hci_create_command 6110 6111 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6112 // dump packet 6113 if (dump) { 6114 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 6115 } 6116 6117 // dispatch to all event handlers 6118 btstack_linked_list_iterator_t it; 6119 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6120 while (btstack_linked_list_iterator_has_next(&it)){ 6121 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6122 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6123 } 6124 } 6125 6126 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6127 if (!hci_stack->acl_packet_handler) return; 6128 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6129 } 6130 6131 #ifdef ENABLE_CLASSIC 6132 static void hci_notify_if_sco_can_send_now(void){ 6133 // notify SCO sender if waiting 6134 if (!hci_stack->sco_waiting_for_can_send_now) return; 6135 if (hci_can_send_sco_packet_now()){ 6136 hci_stack->sco_waiting_for_can_send_now = 0; 6137 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6138 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6139 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6140 } 6141 } 6142 6143 // parsing end emitting has been merged to reduce code size 6144 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6145 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6146 6147 uint8_t * eir_data; 6148 ad_context_t context; 6149 const uint8_t * name; 6150 uint8_t name_len; 6151 6152 if (size < 3) return; 6153 6154 int event_type = hci_event_packet_get_type(packet); 6155 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6156 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6157 6158 switch (event_type){ 6159 case HCI_EVENT_INQUIRY_RESULT: 6160 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6161 if (size != (3 + (num_responses * 14))) return; 6162 break; 6163 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6164 if (size != 257) return; 6165 if (num_responses != 1) return; 6166 break; 6167 default: 6168 return; 6169 } 6170 6171 // event[1] is set at the end 6172 int i; 6173 for (i=0; i<num_responses;i++){ 6174 memset(event, 0, sizeof(event)); 6175 event[0] = GAP_EVENT_INQUIRY_RESULT; 6176 uint8_t event_size = 27; // if name is not set by EIR 6177 6178 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6179 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6180 (void)memcpy(&event[9], 6181 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6182 3); // class of device 6183 (void)memcpy(&event[12], 6184 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6185 2); // clock offset 6186 6187 switch (event_type){ 6188 case HCI_EVENT_INQUIRY_RESULT: 6189 // 14,15,16,17 = 0, size 18 6190 break; 6191 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6192 event[14] = 1; 6193 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6194 // 16,17 = 0, size 18 6195 break; 6196 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6197 event[14] = 1; 6198 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6199 // EIR packets only contain a single inquiry response 6200 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6201 name = NULL; 6202 // Iterate over EIR data 6203 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6204 uint8_t data_type = ad_iterator_get_data_type(&context); 6205 uint8_t data_size = ad_iterator_get_data_len(&context); 6206 const uint8_t * data = ad_iterator_get_data(&context); 6207 // Prefer Complete Local Name over Shortened Local Name 6208 switch (data_type){ 6209 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6210 if (name) continue; 6211 /* fall through */ 6212 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6213 name = data; 6214 name_len = data_size; 6215 break; 6216 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6217 if (data_size != 8) break; 6218 event[16] = 1; 6219 memcpy(&event[17], data, 8); 6220 break; 6221 default: 6222 break; 6223 } 6224 } 6225 if (name){ 6226 event[25] = 1; 6227 // truncate name if needed 6228 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6229 event[26] = len; 6230 (void)memcpy(&event[27], name, len); 6231 event_size += len; 6232 } 6233 break; 6234 default: 6235 return; 6236 } 6237 event[1] = event_size - 2; 6238 hci_emit_event(event, event_size, 1); 6239 } 6240 } 6241 #endif 6242 6243 void hci_emit_state(void){ 6244 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6245 uint8_t event[3]; 6246 event[0] = BTSTACK_EVENT_STATE; 6247 event[1] = sizeof(event) - 2u; 6248 event[2] = hci_stack->state; 6249 hci_emit_event(event, sizeof(event), 1); 6250 } 6251 6252 #ifdef ENABLE_CLASSIC 6253 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6254 uint8_t event[13]; 6255 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6256 event[1] = sizeof(event) - 2; 6257 event[2] = status; 6258 little_endian_store_16(event, 3, con_handle); 6259 reverse_bd_addr(address, &event[5]); 6260 event[11] = 1; // ACL connection 6261 event[12] = 0; // encryption disabled 6262 hci_emit_event(event, sizeof(event), 1); 6263 } 6264 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6265 if (disable_l2cap_timeouts) return; 6266 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6267 uint8_t event[4]; 6268 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6269 event[1] = sizeof(event) - 2; 6270 little_endian_store_16(event, 2, conn->con_handle); 6271 hci_emit_event(event, sizeof(event), 1); 6272 } 6273 #endif 6274 6275 #ifdef ENABLE_BLE 6276 #ifdef ENABLE_LE_CENTRAL 6277 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){ 6278 uint8_t event[21]; 6279 event[0] = HCI_EVENT_LE_META; 6280 event[1] = sizeof(event) - 2u; 6281 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6282 event[3] = status; 6283 little_endian_store_16(event, 4, con_handle); 6284 event[6] = 0; // TODO: role 6285 event[7] = address_type; 6286 reverse_bd_addr(address, &event[8]); 6287 little_endian_store_16(event, 14, 0); // interval 6288 little_endian_store_16(event, 16, 0); // latency 6289 little_endian_store_16(event, 18, 0); // supervision timeout 6290 event[20] = 0; // master clock accuracy 6291 hci_emit_event(event, sizeof(event), 1); 6292 } 6293 #endif 6294 #endif 6295 6296 static void hci_emit_transport_packet_sent(void){ 6297 // notify upper stack that it might be possible to send again 6298 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6299 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6300 } 6301 6302 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6303 uint8_t event[6]; 6304 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6305 event[1] = sizeof(event) - 2u; 6306 event[2] = 0; // status = OK 6307 little_endian_store_16(event, 3, con_handle); 6308 event[5] = reason; 6309 hci_emit_event(event, sizeof(event), 1); 6310 } 6311 6312 static void hci_emit_nr_connections_changed(void){ 6313 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6314 uint8_t event[3]; 6315 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6316 event[1] = sizeof(event) - 2u; 6317 event[2] = nr_hci_connections(); 6318 hci_emit_event(event, sizeof(event), 1); 6319 } 6320 6321 static void hci_emit_hci_open_failed(void){ 6322 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6323 uint8_t event[2]; 6324 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6325 event[1] = sizeof(event) - 2u; 6326 hci_emit_event(event, sizeof(event), 1); 6327 } 6328 6329 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6330 log_info("hci_emit_dedicated_bonding_result %u ", status); 6331 uint8_t event[9]; 6332 int pos = 0; 6333 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6334 event[pos++] = sizeof(event) - 2u; 6335 event[pos++] = status; 6336 reverse_bd_addr(address, &event[pos]); 6337 hci_emit_event(event, sizeof(event), 1); 6338 } 6339 6340 6341 #ifdef ENABLE_CLASSIC 6342 6343 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6344 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6345 uint8_t event[5]; 6346 int pos = 0; 6347 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6348 event[pos++] = sizeof(event) - 2; 6349 little_endian_store_16(event, 2, con_handle); 6350 pos += 2; 6351 event[pos++] = level; 6352 hci_emit_event(event, sizeof(event), 1); 6353 } 6354 6355 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6356 if (!connection) return LEVEL_0; 6357 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6358 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6359 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6360 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6361 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6362 // LEVEL 4 always requires 128 bit encrytion key size 6363 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6364 security_level = LEVEL_3; 6365 } 6366 return security_level; 6367 } 6368 6369 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6370 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6371 uint8_t event[3]; 6372 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6373 event[1] = sizeof(event) - 2; 6374 event[2] = enabled; 6375 hci_emit_event(event, sizeof(event), 1); 6376 } 6377 6378 // query if remote side supports eSCO 6379 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6380 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6381 if (!connection) return false; 6382 return (connection->remote_supported_features[0] & 1) != 0; 6383 } 6384 6385 static bool hci_ssp_supported(hci_connection_t * connection){ 6386 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6387 return (connection->bonding_flags & mask) == mask; 6388 } 6389 6390 // query if remote side supports SSP 6391 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6392 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6393 if (!connection) return false; 6394 return hci_ssp_supported(connection) ? 1 : 0; 6395 } 6396 6397 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6398 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6399 } 6400 6401 /** 6402 * Check if remote supported features query has completed 6403 */ 6404 bool hci_remote_features_available(hci_con_handle_t handle){ 6405 hci_connection_t * connection = hci_connection_for_handle(handle); 6406 if (!connection) return false; 6407 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6408 } 6409 6410 /** 6411 * Trigger remote supported features query 6412 */ 6413 6414 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6415 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6416 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6417 } 6418 } 6419 6420 void hci_remote_features_query(hci_con_handle_t con_handle){ 6421 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6422 if (!connection) return; 6423 hci_trigger_remote_features_for_connection(connection); 6424 hci_run(); 6425 } 6426 6427 // GAP API 6428 /** 6429 * @bbrief enable/disable bonding. default is enabled 6430 * @praram enabled 6431 */ 6432 void gap_set_bondable_mode(int enable){ 6433 hci_stack->bondable = enable ? 1 : 0; 6434 } 6435 /** 6436 * @brief Get bondable mode. 6437 * @return 1 if bondable 6438 */ 6439 int gap_get_bondable_mode(void){ 6440 return hci_stack->bondable; 6441 } 6442 6443 /** 6444 * @brief map link keys to security levels 6445 */ 6446 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6447 switch (link_key_type){ 6448 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6449 return LEVEL_4; 6450 case COMBINATION_KEY: 6451 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6452 return LEVEL_3; 6453 default: 6454 return LEVEL_2; 6455 } 6456 } 6457 6458 /** 6459 * @brief map link keys to secure connection yes/no 6460 */ 6461 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6462 switch (link_key_type){ 6463 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6464 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6465 return true; 6466 default: 6467 return false; 6468 } 6469 } 6470 6471 /** 6472 * @brief map link keys to authenticated 6473 */ 6474 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6475 switch (link_key_type){ 6476 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6477 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6478 return true; 6479 default: 6480 return false; 6481 } 6482 } 6483 6484 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6485 log_info("gap_mitm_protection_required_for_security_level %u", level); 6486 return level > LEVEL_2; 6487 } 6488 6489 /** 6490 * @brief get current security level 6491 */ 6492 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6493 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6494 if (!connection) return LEVEL_0; 6495 return gap_security_level_for_connection(connection); 6496 } 6497 6498 /** 6499 * @brief request connection to device to 6500 * @result GAP_AUTHENTICATION_RESULT 6501 */ 6502 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6503 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6504 if (!connection){ 6505 hci_emit_security_level(con_handle, LEVEL_0); 6506 return; 6507 } 6508 6509 btstack_assert(hci_is_le_connection(connection) == false); 6510 6511 // 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) 6512 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6513 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6514 requested_level = LEVEL_4; 6515 } 6516 6517 gap_security_level_t current_level = gap_security_level(con_handle); 6518 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6519 requested_level, connection->requested_security_level, current_level); 6520 6521 // authentication active if authentication request was sent or planned level > 0 6522 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6523 if (authentication_active){ 6524 // authentication already active 6525 if (connection->requested_security_level < requested_level){ 6526 // increase requested level as new level is higher 6527 // TODO: handle re-authentication when done 6528 connection->requested_security_level = requested_level; 6529 } 6530 } else { 6531 // no request active, notify if security sufficient 6532 if (requested_level <= current_level){ 6533 hci_emit_security_level(con_handle, current_level); 6534 return; 6535 } 6536 6537 // store request 6538 connection->requested_security_level = requested_level; 6539 6540 // request remote features if not already active 6541 hci_remote_features_query(con_handle); 6542 6543 // start to authenticate connection 6544 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6545 hci_run(); 6546 } 6547 } 6548 6549 /** 6550 * @brief start dedicated bonding with device. disconnect after bonding 6551 * @param device 6552 * @param request MITM protection 6553 * @result GAP_DEDICATED_BONDING_COMPLETE 6554 */ 6555 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6556 6557 // create connection state machine 6558 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6559 6560 if (!connection){ 6561 return BTSTACK_MEMORY_ALLOC_FAILED; 6562 } 6563 6564 // delete linkn key 6565 gap_drop_link_key_for_bd_addr(device); 6566 6567 // configure LEVEL_2/3, dedicated bonding 6568 connection->state = SEND_CREATE_CONNECTION; 6569 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6570 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6571 connection->bonding_flags = BONDING_DEDICATED; 6572 6573 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6574 6575 // handle: connnection failure (connection complete != ok) 6576 // handle: authentication failure 6577 // handle: disconnect on done 6578 6579 hci_run(); 6580 6581 return 0; 6582 } 6583 6584 void gap_set_local_name(const char * local_name){ 6585 hci_stack->local_name = local_name; 6586 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6587 // also update EIR if not set by user 6588 if (hci_stack->eir_data == NULL){ 6589 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6590 } 6591 hci_run(); 6592 } 6593 #endif 6594 6595 6596 #ifdef ENABLE_BLE 6597 6598 #ifdef ENABLE_LE_CENTRAL 6599 void gap_start_scan(void){ 6600 hci_stack->le_scanning_enabled = true; 6601 hci_run(); 6602 } 6603 6604 void gap_stop_scan(void){ 6605 hci_stack->le_scanning_enabled = false; 6606 hci_run(); 6607 } 6608 6609 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6610 hci_stack->le_scan_type = scan_type; 6611 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6612 hci_stack->le_scan_interval = scan_interval; 6613 hci_stack->le_scan_window = scan_window; 6614 hci_stack->le_scanning_param_update = true; 6615 hci_run(); 6616 } 6617 6618 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6619 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6620 } 6621 6622 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6623 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6624 if (!conn){ 6625 // disallow if le connection is already outgoing 6626 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6627 log_error("le connection already active"); 6628 return ERROR_CODE_COMMAND_DISALLOWED; 6629 } 6630 6631 log_info("gap_connect: no connection exists yet, creating context"); 6632 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6633 if (!conn){ 6634 // notify client that alloc failed 6635 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6636 log_info("gap_connect: failed to alloc hci_connection_t"); 6637 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6638 } 6639 6640 // set le connecting state 6641 if (hci_is_le_connection_type(addr_type)){ 6642 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6643 } 6644 6645 conn->state = SEND_CREATE_CONNECTION; 6646 log_info("gap_connect: send create connection next"); 6647 hci_run(); 6648 return ERROR_CODE_SUCCESS; 6649 } 6650 6651 if (!hci_is_le_connection(conn) || 6652 (conn->state == SEND_CREATE_CONNECTION) || 6653 (conn->state == SENT_CREATE_CONNECTION)) { 6654 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6655 log_error("gap_connect: classic connection or connect is already being created"); 6656 return GATT_CLIENT_IN_WRONG_STATE; 6657 } 6658 6659 // check if connection was just disconnected 6660 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6661 log_info("gap_connect: send create connection (again)"); 6662 conn->state = SEND_CREATE_CONNECTION; 6663 hci_run(); 6664 return ERROR_CODE_SUCCESS; 6665 } 6666 6667 log_info("gap_connect: context exists with state %u", conn->state); 6668 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6669 hci_run(); 6670 return ERROR_CODE_SUCCESS; 6671 } 6672 6673 // @assumption: only a single outgoing LE Connection exists 6674 static hci_connection_t * gap_get_outgoing_connection(void){ 6675 btstack_linked_item_t *it; 6676 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6677 hci_connection_t * conn = (hci_connection_t *) it; 6678 if (!hci_is_le_connection(conn)) continue; 6679 switch (conn->state){ 6680 case SEND_CREATE_CONNECTION: 6681 case SENT_CREATE_CONNECTION: 6682 case SENT_CANCEL_CONNECTION: 6683 return conn; 6684 default: 6685 break; 6686 }; 6687 } 6688 return NULL; 6689 } 6690 6691 uint8_t gap_connect_cancel(void){ 6692 hci_connection_t * conn = gap_get_outgoing_connection(); 6693 if (!conn) return 0; 6694 switch (conn->state){ 6695 case SEND_CREATE_CONNECTION: 6696 // skip sending create connection and emit event instead 6697 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6698 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6699 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6700 btstack_memory_hci_connection_free( conn ); 6701 break; 6702 case SENT_CREATE_CONNECTION: 6703 // request to send cancel connection 6704 conn->state = SEND_CANCEL_CONNECTION; 6705 hci_run(); 6706 break; 6707 default: 6708 break; 6709 } 6710 return 0; 6711 } 6712 6713 /** 6714 * @brief Set connection parameters for outgoing connections 6715 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6716 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6717 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6718 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6719 * @param conn_latency, default: 4 6720 * @param supervision_timeout (unit: 10ms), default: 720 ms 6721 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6722 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6723 */ 6724 6725 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6726 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6727 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6728 hci_stack->le_connection_scan_interval = conn_scan_interval; 6729 hci_stack->le_connection_scan_window = conn_scan_window; 6730 hci_stack->le_connection_interval_min = conn_interval_min; 6731 hci_stack->le_connection_interval_max = conn_interval_max; 6732 hci_stack->le_connection_latency = conn_latency; 6733 hci_stack->le_supervision_timeout = supervision_timeout; 6734 hci_stack->le_minimum_ce_length = min_ce_length; 6735 hci_stack->le_maximum_ce_length = max_ce_length; 6736 } 6737 #endif 6738 6739 /** 6740 * @brief Updates the connection parameters for a given LE connection 6741 * @param handle 6742 * @param conn_interval_min (unit: 1.25ms) 6743 * @param conn_interval_max (unit: 1.25ms) 6744 * @param conn_latency 6745 * @param supervision_timeout (unit: 10ms) 6746 * @return 0 if ok 6747 */ 6748 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6749 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6750 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6751 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6752 connection->le_conn_interval_min = conn_interval_min; 6753 connection->le_conn_interval_max = conn_interval_max; 6754 connection->le_conn_latency = conn_latency; 6755 connection->le_supervision_timeout = supervision_timeout; 6756 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6757 hci_run(); 6758 return 0; 6759 } 6760 6761 /** 6762 * @brief Request an update of the connection parameter for a given LE connection 6763 * @param handle 6764 * @param conn_interval_min (unit: 1.25ms) 6765 * @param conn_interval_max (unit: 1.25ms) 6766 * @param conn_latency 6767 * @param supervision_timeout (unit: 10ms) 6768 * @return 0 if ok 6769 */ 6770 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6771 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6772 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6773 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6774 connection->le_conn_interval_min = conn_interval_min; 6775 connection->le_conn_interval_max = conn_interval_max; 6776 connection->le_conn_latency = conn_latency; 6777 connection->le_supervision_timeout = supervision_timeout; 6778 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6779 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6780 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6781 return 0; 6782 } 6783 6784 #ifdef ENABLE_LE_PERIPHERAL 6785 6786 /** 6787 * @brief Set Advertisement Data 6788 * @param advertising_data_length 6789 * @param advertising_data (max 31 octets) 6790 * @note data is not copied, pointer has to stay valid 6791 */ 6792 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6793 hci_stack->le_advertisements_data_len = advertising_data_length; 6794 hci_stack->le_advertisements_data = advertising_data; 6795 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6796 hci_run(); 6797 } 6798 6799 /** 6800 * @brief Set Scan Response Data 6801 * @param advertising_data_length 6802 * @param advertising_data (max 31 octets) 6803 * @note data is not copied, pointer has to stay valid 6804 */ 6805 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6806 hci_stack->le_scan_response_data_len = scan_response_data_length; 6807 hci_stack->le_scan_response_data = scan_response_data; 6808 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6809 hci_run(); 6810 } 6811 6812 /** 6813 * @brief Set Advertisement Parameters 6814 * @param adv_int_min 6815 * @param adv_int_max 6816 * @param adv_type 6817 * @param direct_address_type 6818 * @param direct_address 6819 * @param channel_map 6820 * @param filter_policy 6821 * 6822 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6823 */ 6824 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6825 uint8_t direct_address_typ, bd_addr_t direct_address, 6826 uint8_t channel_map, uint8_t filter_policy) { 6827 6828 hci_stack->le_advertisements_interval_min = adv_int_min; 6829 hci_stack->le_advertisements_interval_max = adv_int_max; 6830 hci_stack->le_advertisements_type = adv_type; 6831 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6832 hci_stack->le_advertisements_channel_map = channel_map; 6833 hci_stack->le_advertisements_filter_policy = filter_policy; 6834 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6835 6); 6836 6837 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6838 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6839 hci_run(); 6840 } 6841 6842 /** 6843 * @brief Enable/Disable Advertisements 6844 * @param enabled 6845 */ 6846 void gap_advertisements_enable(int enabled){ 6847 if (enabled == 0){ 6848 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6849 } else { 6850 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6851 } 6852 hci_update_advertisements_enabled_for_current_roles(); 6853 hci_run(); 6854 } 6855 6856 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6857 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6858 btstack_linked_list_iterator_t it; 6859 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6860 while (btstack_linked_list_iterator_has_next(&it)){ 6861 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6862 if ( item->advertising_handle == advertising_handle ) { 6863 return item; 6864 } 6865 } 6866 return NULL; 6867 } 6868 6869 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6870 // find free advertisement handle 6871 uint8_t advertisement_handle; 6872 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6873 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6874 } 6875 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6876 // clear 6877 memset(storage, 0, sizeof(le_advertising_set_t)); 6878 // copy params 6879 storage->advertising_handle = advertisement_handle; 6880 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6881 // add to list 6882 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6883 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6884 *out_advertising_handle = advertisement_handle; 6885 // set tasks and start 6886 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6887 hci_run(); 6888 return ERROR_CODE_SUCCESS; 6889 } 6890 6891 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6892 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6893 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6894 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6895 // set tasks and start 6896 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6897 hci_run(); 6898 return ERROR_CODE_SUCCESS; 6899 } 6900 6901 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6902 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6903 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6904 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6905 return ERROR_CODE_SUCCESS; 6906 } 6907 6908 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 6909 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6910 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6911 // periodic advertising requires neither connectable, scannable, legacy or anonymous 6912 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6913 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 6914 // set tasks and start 6915 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6916 hci_run(); 6917 return ERROR_CODE_SUCCESS; 6918 } 6919 6920 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 6921 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6922 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6923 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 6924 return ERROR_CODE_SUCCESS; 6925 } 6926 6927 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6928 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6929 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6930 memcpy(advertising_set->random_address, random_address, 6); 6931 // set tasks and start 6932 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6933 hci_run(); 6934 return ERROR_CODE_SUCCESS; 6935 } 6936 6937 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 6938 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6939 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6940 advertising_set->adv_data = advertising_data; 6941 advertising_set->adv_data_len = advertising_data_length; 6942 // set tasks and start 6943 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6944 hci_run(); 6945 return ERROR_CODE_SUCCESS; 6946 } 6947 6948 uint8_t gap_extended_advertising_set_scan_response_data(uint8_t advertising_handle, uint16_t scan_response_data_length, const uint8_t * scan_response_data){ 6949 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6950 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6951 advertising_set->scan_data = scan_response_data; 6952 advertising_set->scan_data_len = scan_response_data_length; 6953 // set tasks and start 6954 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6955 hci_run(); 6956 return ERROR_CODE_SUCCESS; 6957 } 6958 6959 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 6960 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6961 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6962 advertising_set->periodic_data = periodic_data; 6963 advertising_set->periodic_data_len = periodic_data_length; 6964 // set tasks and start 6965 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6966 hci_run(); 6967 return ERROR_CODE_SUCCESS; 6968 } 6969 6970 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6971 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6972 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6973 advertising_set->enable_timeout = timeout; 6974 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6975 // set tasks and start 6976 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6977 hci_run(); 6978 return ERROR_CODE_SUCCESS; 6979 } 6980 6981 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6982 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6983 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6984 // set tasks and start 6985 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6986 hci_run(); 6987 return ERROR_CODE_SUCCESS; 6988 } 6989 6990 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 6991 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6992 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6993 // set tasks and start 6994 advertising_set->periodic_include_adi = include_adi; 6995 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6996 hci_run(); 6997 return ERROR_CODE_SUCCESS; 6998 } 6999 7000 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7001 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7002 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7003 // set tasks and start 7004 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7005 hci_run(); 7006 return ERROR_CODE_SUCCESS; 7007 } 7008 7009 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7010 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7011 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7012 // set tasks and start 7013 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7014 hci_run(); 7015 return ERROR_CODE_SUCCESS; 7016 } 7017 #endif 7018 7019 #endif 7020 7021 void hci_le_set_own_address_type(uint8_t own_address_type){ 7022 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7023 if (own_address_type == hci_stack->le_own_addr_type) return; 7024 hci_stack->le_own_addr_type = own_address_type; 7025 7026 #ifdef ENABLE_LE_PERIPHERAL 7027 // update advertisement parameters, too 7028 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7029 hci_run(); 7030 #endif 7031 #ifdef ENABLE_LE_CENTRAL 7032 // note: we don't update scan parameters or modify ongoing connection attempts 7033 #endif 7034 } 7035 7036 void hci_le_random_address_set(const bd_addr_t random_address){ 7037 memcpy(hci_stack->le_random_address, random_address, 6); 7038 hci_stack->le_random_address_set = true; 7039 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7040 hci_run(); 7041 } 7042 7043 #endif 7044 7045 uint8_t gap_disconnect(hci_con_handle_t handle){ 7046 hci_connection_t * conn = hci_connection_for_handle(handle); 7047 if (!conn){ 7048 hci_emit_disconnection_complete(handle, 0); 7049 return 0; 7050 } 7051 // ignore if already disconnected 7052 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7053 return 0; 7054 } 7055 conn->state = SEND_DISCONNECT; 7056 hci_run(); 7057 return 0; 7058 } 7059 7060 int gap_read_rssi(hci_con_handle_t con_handle){ 7061 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7062 if (hci_connection == NULL) return 0; 7063 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7064 hci_run(); 7065 return 1; 7066 } 7067 7068 /** 7069 * @brief Get connection type 7070 * @param con_handle 7071 * @result connection_type 7072 */ 7073 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7074 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7075 if (!conn) return GAP_CONNECTION_INVALID; 7076 switch (conn->address_type){ 7077 case BD_ADDR_TYPE_LE_PUBLIC: 7078 case BD_ADDR_TYPE_LE_RANDOM: 7079 return GAP_CONNECTION_LE; 7080 case BD_ADDR_TYPE_SCO: 7081 return GAP_CONNECTION_SCO; 7082 case BD_ADDR_TYPE_ACL: 7083 return GAP_CONNECTION_ACL; 7084 default: 7085 return GAP_CONNECTION_INVALID; 7086 } 7087 } 7088 7089 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7090 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7091 if (!conn) return HCI_ROLE_INVALID; 7092 return (hci_role_t) conn->role; 7093 } 7094 7095 7096 #ifdef ENABLE_CLASSIC 7097 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7098 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7099 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7100 conn->request_role = role; 7101 hci_run(); 7102 return ERROR_CODE_SUCCESS; 7103 } 7104 #endif 7105 7106 #ifdef ENABLE_BLE 7107 7108 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){ 7109 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7110 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7111 7112 conn->le_phy_update_all_phys = all_phys; 7113 conn->le_phy_update_tx_phys = tx_phys; 7114 conn->le_phy_update_rx_phys = rx_phys; 7115 conn->le_phy_update_phy_options = phy_options; 7116 7117 hci_run(); 7118 7119 return 0; 7120 } 7121 7122 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7123 // check if already in list 7124 btstack_linked_list_iterator_t it; 7125 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7126 while (btstack_linked_list_iterator_has_next(&it)) { 7127 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7128 if (entry->address_type != address_type) { 7129 continue; 7130 } 7131 if (memcmp(entry->address, address, 6) != 0) { 7132 continue; 7133 } 7134 // disallow if already scheduled to add 7135 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7136 return ERROR_CODE_COMMAND_DISALLOWED; 7137 } 7138 // still on controller, but scheduled to remove -> re-add 7139 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7140 return ERROR_CODE_SUCCESS; 7141 } 7142 // alloc and add to list 7143 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7144 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7145 entry->address_type = address_type; 7146 (void)memcpy(entry->address, address, 6); 7147 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7148 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7149 return ERROR_CODE_SUCCESS; 7150 } 7151 7152 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7153 btstack_linked_list_iterator_t it; 7154 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7155 while (btstack_linked_list_iterator_has_next(&it)){ 7156 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7157 if (entry->address_type != address_type) { 7158 continue; 7159 } 7160 if (memcmp(entry->address, address, 6) != 0) { 7161 continue; 7162 } 7163 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7164 // remove from controller if already present 7165 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7166 } else { 7167 // directly remove entry from whitelist 7168 btstack_linked_list_iterator_remove(&it); 7169 btstack_memory_whitelist_entry_free(entry); 7170 } 7171 return ERROR_CODE_SUCCESS; 7172 } 7173 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7174 } 7175 7176 static void hci_whitelist_clear(void){ 7177 btstack_linked_list_iterator_t it; 7178 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7179 while (btstack_linked_list_iterator_has_next(&it)){ 7180 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7181 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7182 // remove from controller if already present 7183 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7184 continue; 7185 } 7186 // directly remove entry from whitelist 7187 btstack_linked_list_iterator_remove(&it); 7188 btstack_memory_whitelist_entry_free(entry); 7189 } 7190 } 7191 7192 // free all entries unconditionally 7193 static void hci_whitelist_free(void){ 7194 btstack_linked_list_iterator_t lit; 7195 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7196 while (btstack_linked_list_iterator_has_next(&lit)){ 7197 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7198 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7199 btstack_memory_whitelist_entry_free(entry); 7200 } 7201 } 7202 7203 /** 7204 * @brief Clear Whitelist 7205 * @return 0 if ok 7206 */ 7207 uint8_t gap_whitelist_clear(void){ 7208 hci_whitelist_clear(); 7209 hci_run(); 7210 return ERROR_CODE_SUCCESS; 7211 } 7212 7213 /** 7214 * @brief Add Device to Whitelist 7215 * @param address_typ 7216 * @param address 7217 * @return 0 if ok 7218 */ 7219 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7220 uint8_t status = hci_whitelist_add(address_type, address); 7221 if (status){ 7222 return status; 7223 } 7224 hci_run(); 7225 return ERROR_CODE_SUCCESS; 7226 } 7227 7228 /** 7229 * @brief Remove Device from Whitelist 7230 * @param address_typ 7231 * @param address 7232 * @return 0 if ok 7233 */ 7234 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7235 uint8_t status = hci_whitelist_remove(address_type, address); 7236 if (status){ 7237 return status; 7238 } 7239 hci_run(); 7240 return ERROR_CODE_SUCCESS; 7241 } 7242 7243 #ifdef ENABLE_LE_CENTRAL 7244 /** 7245 * @brief Connect with Whitelist 7246 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7247 * @return - if ok 7248 */ 7249 uint8_t gap_connect_with_whitelist(void){ 7250 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7251 return ERROR_CODE_COMMAND_DISALLOWED; 7252 } 7253 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7254 hci_run(); 7255 return ERROR_CODE_SUCCESS; 7256 } 7257 7258 /** 7259 * @brief Auto Connection Establishment - Start Connecting to device 7260 * @param address_typ 7261 * @param address 7262 * @return 0 if ok 7263 */ 7264 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7265 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7266 return ERROR_CODE_COMMAND_DISALLOWED; 7267 } 7268 7269 uint8_t status = hci_whitelist_add(address_type, address); 7270 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7271 return status; 7272 } 7273 7274 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7275 7276 hci_run(); 7277 return ERROR_CODE_SUCCESS; 7278 } 7279 7280 /** 7281 * @brief Auto Connection Establishment - Stop Connecting to device 7282 * @param address_typ 7283 * @param address 7284 * @return 0 if ok 7285 */ 7286 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7287 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7288 return ERROR_CODE_COMMAND_DISALLOWED; 7289 } 7290 7291 hci_whitelist_remove(address_type, address); 7292 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7293 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7294 } 7295 hci_run(); 7296 return 0; 7297 } 7298 7299 /** 7300 * @brief Auto Connection Establishment - Stop everything 7301 * @note Convenience function to stop all active auto connection attempts 7302 */ 7303 uint8_t gap_auto_connection_stop_all(void){ 7304 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7305 return ERROR_CODE_COMMAND_DISALLOWED; 7306 } 7307 hci_whitelist_clear(); 7308 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7309 hci_run(); 7310 return ERROR_CODE_SUCCESS; 7311 } 7312 7313 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7314 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7315 if (!conn) return 0; 7316 return conn->le_connection_interval; 7317 } 7318 #endif 7319 #endif 7320 7321 #ifdef ENABLE_CLASSIC 7322 /** 7323 * @brief Set Extended Inquiry Response data 7324 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7325 * @note has to be done before stack starts up 7326 */ 7327 void gap_set_extended_inquiry_response(const uint8_t * data){ 7328 hci_stack->eir_data = data; 7329 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7330 hci_run(); 7331 } 7332 7333 /** 7334 * @brief Start GAP Classic Inquiry 7335 * @param duration in 1.28s units 7336 * @return 0 if ok 7337 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7338 */ 7339 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7340 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7341 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7342 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7343 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7344 } 7345 hci_stack->inquiry_state = duration_in_1280ms_units; 7346 hci_run(); 7347 return 0; 7348 } 7349 7350 /** 7351 * @brief Stop GAP Classic Inquiry 7352 * @return 0 if ok 7353 */ 7354 int gap_inquiry_stop(void){ 7355 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7356 // emit inquiry complete event, before it even started 7357 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7358 hci_emit_event(event, sizeof(event), 1); 7359 return 0; 7360 } 7361 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7362 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7363 hci_run(); 7364 return 0; 7365 } 7366 7367 void gap_inquiry_set_lap(uint32_t lap){ 7368 hci_stack->inquiry_lap = lap; 7369 } 7370 7371 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7372 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7373 hci_stack->inquiry_scan_window = inquiry_scan_window; 7374 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7375 hci_run(); 7376 } 7377 7378 7379 /** 7380 * @brief Remote Name Request 7381 * @param addr 7382 * @param page_scan_repetition_mode 7383 * @param clock_offset only used when bit 15 is set 7384 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7385 */ 7386 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7387 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7388 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7389 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7390 hci_stack->remote_name_clock_offset = clock_offset; 7391 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7392 hci_run(); 7393 return 0; 7394 } 7395 7396 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7397 hci_stack->gap_pairing_state = state; 7398 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7399 hci_run(); 7400 return 0; 7401 } 7402 7403 /** 7404 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7405 * @param addr 7406 * @param pin_data 7407 * @param pin_len 7408 * @return 0 if ok 7409 */ 7410 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7411 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7412 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7413 hci_stack->gap_pairing_pin_len = pin_len; 7414 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7415 } 7416 7417 /** 7418 * @brief Legacy Pairing Pin Code Response 7419 * @param addr 7420 * @param pin 7421 * @return 0 if ok 7422 */ 7423 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7424 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7425 } 7426 7427 /** 7428 * @brief Abort Legacy Pairing 7429 * @param addr 7430 * @param pin 7431 * @return 0 if ok 7432 */ 7433 int gap_pin_code_negative(bd_addr_t addr){ 7434 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7435 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7436 } 7437 7438 /** 7439 * @brief SSP Passkey Response 7440 * @param addr 7441 * @param passkey 7442 * @return 0 if ok 7443 */ 7444 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7445 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7446 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7447 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7448 } 7449 7450 /** 7451 * @brief Abort SSP Passkey Entry/Pairing 7452 * @param addr 7453 * @param pin 7454 * @return 0 if ok 7455 */ 7456 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7457 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7458 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7459 } 7460 7461 /** 7462 * @brief Accept SSP Numeric Comparison 7463 * @param addr 7464 * @param passkey 7465 * @return 0 if ok 7466 */ 7467 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7468 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7469 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7470 } 7471 7472 /** 7473 * @brief Abort SSP Numeric Comparison/Pairing 7474 * @param addr 7475 * @param pin 7476 * @return 0 if ok 7477 */ 7478 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7479 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7480 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7481 } 7482 7483 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7484 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7485 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7486 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7487 connectionSetAuthenticationFlags(conn, flag); 7488 hci_run(); 7489 return ERROR_CODE_SUCCESS; 7490 } 7491 #endif 7492 7493 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7494 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7495 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7496 } 7497 7498 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7499 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7500 } 7501 #endif 7502 7503 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7504 /** 7505 * @brief Report Remote OOB Data 7506 * @param bd_addr 7507 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7508 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7509 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7510 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7511 */ 7512 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){ 7513 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7514 if (connection == NULL) { 7515 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7516 } 7517 connection->classic_oob_c_192 = c_192; 7518 connection->classic_oob_r_192 = r_192; 7519 7520 // ignore P-256 if not supported by us 7521 if (hci_stack->secure_connections_active){ 7522 connection->classic_oob_c_256 = c_256; 7523 connection->classic_oob_r_256 = r_256; 7524 } 7525 7526 return ERROR_CODE_SUCCESS; 7527 } 7528 /** 7529 * @brief Generate new OOB data 7530 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7531 */ 7532 void gap_ssp_generate_oob_data(void){ 7533 hci_stack->classic_read_local_oob_data = true; 7534 hci_run(); 7535 } 7536 7537 #endif 7538 7539 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7540 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7541 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7542 if (connection == NULL) { 7543 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7544 } 7545 7546 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7547 connection->link_key_type = type; 7548 7549 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7550 } 7551 7552 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7553 /** 7554 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7555 * @param inquiry_mode see bluetooth_defines.h 7556 */ 7557 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7558 hci_stack->inquiry_mode = inquiry_mode; 7559 } 7560 7561 /** 7562 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7563 */ 7564 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7565 hci_stack->sco_voice_setting = voice_setting; 7566 } 7567 7568 /** 7569 * @brief Get SCO Voice Setting 7570 * @return current voice setting 7571 */ 7572 uint16_t hci_get_sco_voice_setting(void){ 7573 return hci_stack->sco_voice_setting; 7574 } 7575 7576 static int hci_have_usb_transport(void){ 7577 if (!hci_stack->hci_transport) return 0; 7578 const char * transport_name = hci_stack->hci_transport->name; 7579 if (!transport_name) return 0; 7580 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7581 } 7582 7583 /** @brief Get SCO packet length for current SCO Voice setting 7584 * @note Using SCO packets of the exact length is required for USB transfer 7585 * @return Length of SCO packets in bytes (not audio frames) 7586 */ 7587 uint16_t hci_get_sco_packet_length(void){ 7588 uint16_t sco_packet_length = 0; 7589 7590 #ifdef ENABLE_SCO_OVER_HCI 7591 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7592 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7593 7594 if (hci_have_usb_transport()){ 7595 // see Core Spec for H2 USB Transfer. 7596 // 3 byte SCO header + 24 bytes per connection 7597 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7598 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7599 } else { 7600 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7601 sco_packet_length = 3 + 60 * multiplier; 7602 // assert that it still fits inside an SCO buffer 7603 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7604 sco_packet_length = 3 + 60; 7605 } 7606 } 7607 #endif 7608 7609 #ifdef HAVE_SCO_TRANSPORT 7610 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7611 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7612 sco_packet_length = 3 + 60 * multiplier; 7613 #endif 7614 return sco_packet_length; 7615 } 7616 7617 /** 7618 * @brief Sets the master/slave policy 7619 * @param policy (0: attempt to become master, 1: let connecting device decide) 7620 */ 7621 void hci_set_master_slave_policy(uint8_t policy){ 7622 hci_stack->master_slave_policy = policy; 7623 } 7624 7625 #endif 7626 7627 HCI_STATE hci_get_state(void){ 7628 return hci_stack->state; 7629 } 7630 7631 #ifdef ENABLE_CLASSIC 7632 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7633 hci_stack->gap_classic_accept_callback = accept_callback; 7634 } 7635 #endif 7636 7637 /** 7638 * @brief Set callback for Bluetooth Hardware Error 7639 */ 7640 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7641 hci_stack->hardware_error_callback = fn; 7642 } 7643 7644 void hci_disconnect_all(void){ 7645 btstack_linked_list_iterator_t it; 7646 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7647 while (btstack_linked_list_iterator_has_next(&it)){ 7648 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7649 if (con->state == SENT_DISCONNECT) continue; 7650 con->state = SEND_DISCONNECT; 7651 } 7652 hci_run(); 7653 } 7654 7655 uint16_t hci_get_manufacturer(void){ 7656 return hci_stack->manufacturer; 7657 } 7658 7659 #ifdef ENABLE_BLE 7660 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7661 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7662 if (!hci_con) return NULL; 7663 return &hci_con->sm_connection; 7664 } 7665 7666 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7667 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7668 #endif 7669 7670 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7671 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7672 if (hci_connection == NULL) return 0; 7673 if (hci_is_le_connection(hci_connection)){ 7674 #ifdef ENABLE_BLE 7675 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7676 if (sm_conn->sm_connection_encrypted) { 7677 return sm_conn->sm_actual_encryption_key_size; 7678 } 7679 #endif 7680 } else { 7681 #ifdef ENABLE_CLASSIC 7682 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7683 return hci_connection->encryption_key_size; 7684 } 7685 #endif 7686 } 7687 return 0; 7688 } 7689 7690 bool gap_authenticated(hci_con_handle_t con_handle){ 7691 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7692 if (hci_connection == NULL) return false; 7693 7694 switch (hci_connection->address_type){ 7695 #ifdef ENABLE_BLE 7696 case BD_ADDR_TYPE_LE_PUBLIC: 7697 case BD_ADDR_TYPE_LE_RANDOM: 7698 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7699 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7700 #endif 7701 #ifdef ENABLE_CLASSIC 7702 case BD_ADDR_TYPE_SCO: 7703 case BD_ADDR_TYPE_ACL: 7704 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7705 #endif 7706 default: 7707 return false; 7708 } 7709 } 7710 7711 bool gap_secure_connection(hci_con_handle_t con_handle){ 7712 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7713 if (hci_connection == NULL) return 0; 7714 7715 switch (hci_connection->address_type){ 7716 #ifdef ENABLE_BLE 7717 case BD_ADDR_TYPE_LE_PUBLIC: 7718 case BD_ADDR_TYPE_LE_RANDOM: 7719 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7720 return hci_connection->sm_connection.sm_connection_sc != 0; 7721 #endif 7722 #ifdef ENABLE_CLASSIC 7723 case BD_ADDR_TYPE_SCO: 7724 case BD_ADDR_TYPE_ACL: 7725 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7726 #endif 7727 default: 7728 return false; 7729 } 7730 } 7731 7732 bool gap_bonded(hci_con_handle_t con_handle){ 7733 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7734 if (hci_connection == NULL) return 0; 7735 7736 #ifdef ENABLE_CLASSIC 7737 link_key_t link_key; 7738 link_key_type_t link_key_type; 7739 #endif 7740 switch (hci_connection->address_type){ 7741 #ifdef ENABLE_BLE 7742 case BD_ADDR_TYPE_LE_PUBLIC: 7743 case BD_ADDR_TYPE_LE_RANDOM: 7744 return hci_connection->sm_connection.sm_le_db_index >= 0; 7745 #endif 7746 #ifdef ENABLE_CLASSIC 7747 case BD_ADDR_TYPE_SCO: 7748 case BD_ADDR_TYPE_ACL: 7749 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7750 #endif 7751 default: 7752 return false; 7753 } 7754 } 7755 7756 #ifdef ENABLE_BLE 7757 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7758 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7759 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7760 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7761 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7762 return sm_conn->sm_connection_authorization_state; 7763 } 7764 #endif 7765 7766 #ifdef ENABLE_CLASSIC 7767 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){ 7768 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7769 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7770 conn->sniff_min_interval = sniff_min_interval; 7771 conn->sniff_max_interval = sniff_max_interval; 7772 conn->sniff_attempt = sniff_attempt; 7773 conn->sniff_timeout = sniff_timeout; 7774 hci_run(); 7775 return 0; 7776 } 7777 7778 /** 7779 * @brief Exit Sniff mode 7780 * @param con_handle 7781 @ @return 0 if ok 7782 */ 7783 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7784 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7785 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7786 conn->sniff_min_interval = 0xffff; 7787 hci_run(); 7788 return 0; 7789 } 7790 7791 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){ 7792 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7793 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7794 conn->sniff_subrating_max_latency = max_latency; 7795 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7796 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7797 hci_run(); 7798 return ERROR_CODE_SUCCESS; 7799 } 7800 7801 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){ 7802 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7803 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7804 conn->qos_service_type = service_type; 7805 conn->qos_token_rate = token_rate; 7806 conn->qos_peak_bandwidth = peak_bandwidth; 7807 conn->qos_latency = latency; 7808 conn->qos_delay_variation = delay_variation; 7809 hci_run(); 7810 return ERROR_CODE_SUCCESS; 7811 } 7812 7813 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7814 hci_stack->new_page_scan_interval = page_scan_interval; 7815 hci_stack->new_page_scan_window = page_scan_window; 7816 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7817 hci_run(); 7818 } 7819 7820 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7821 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7822 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7823 hci_run(); 7824 } 7825 7826 void gap_set_page_timeout(uint16_t page_timeout){ 7827 hci_stack->page_timeout = page_timeout; 7828 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7829 hci_run(); 7830 } 7831 7832 #endif 7833 7834 void hci_halting_defer(void){ 7835 if (hci_stack->state != HCI_STATE_HALTING) return; 7836 switch (hci_stack->substate){ 7837 case HCI_HALTING_READY_FOR_CLOSE: 7838 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 7839 break; 7840 default: 7841 break; 7842 } 7843 } 7844 7845 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7846 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7847 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7848 if (le_device_db_index >= le_device_db_max_count()) return; 7849 uint8_t offset = le_device_db_index >> 3; 7850 uint8_t mask = 1 << (le_device_db_index & 7); 7851 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7852 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7853 // note: go back to remove entries, otherwise, a remove + add will skip the add 7854 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7855 } 7856 } 7857 7858 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7859 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7860 if (le_device_db_index >= le_device_db_max_count()) return; 7861 uint8_t offset = le_device_db_index >> 3; 7862 uint8_t mask = 1 << (le_device_db_index & 7); 7863 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7864 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7865 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7866 } 7867 } 7868 7869 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7870 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7871 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7872 } 7873 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7874 // restart le resolving list update 7875 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7876 } 7877 return ERROR_CODE_SUCCESS; 7878 } 7879 #endif 7880 7881 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7882 void hci_setup_test_connections_fuzz(void){ 7883 hci_connection_t * conn; 7884 7885 // default address: 66:55:44:33:00:01 7886 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7887 7888 // setup Controller info 7889 hci_stack->num_cmd_packets = 255; 7890 hci_stack->acl_packets_total_num = 255; 7891 7892 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7893 addr[5] = 0x01; 7894 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7895 conn->con_handle = addr[5]; 7896 conn->role = HCI_ROLE_SLAVE; 7897 conn->state = RECEIVED_CONNECTION_REQUEST; 7898 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7899 7900 // setup incoming Classic SCO connection with con handle 0x0002 7901 addr[5] = 0x02; 7902 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7903 conn->con_handle = addr[5]; 7904 conn->role = HCI_ROLE_SLAVE; 7905 conn->state = RECEIVED_CONNECTION_REQUEST; 7906 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7907 7908 // setup ready Classic ACL connection with con handle 0x0003 7909 addr[5] = 0x03; 7910 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7911 conn->con_handle = addr[5]; 7912 conn->role = HCI_ROLE_SLAVE; 7913 conn->state = OPEN; 7914 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7915 7916 // setup ready Classic SCO connection with con handle 0x0004 7917 addr[5] = 0x04; 7918 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7919 conn->con_handle = addr[5]; 7920 conn->role = HCI_ROLE_SLAVE; 7921 conn->state = OPEN; 7922 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7923 7924 // setup ready LE ACL connection with con handle 0x005 and public address 7925 addr[5] = 0x05; 7926 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7927 conn->con_handle = addr[5]; 7928 conn->role = HCI_ROLE_SLAVE; 7929 conn->state = OPEN; 7930 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7931 conn->sm_connection.sm_connection_encrypted = 1; 7932 } 7933 7934 void hci_free_connections_fuzz(void){ 7935 btstack_linked_list_iterator_t it; 7936 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7937 while (btstack_linked_list_iterator_has_next(&it)){ 7938 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7939 btstack_linked_list_iterator_remove(&it); 7940 btstack_memory_hci_connection_free(con); 7941 } 7942 } 7943 void hci_simulate_working_fuzz(void){ 7944 hci_stack->le_scanning_param_update = false; 7945 hci_init_done(); 7946 hci_stack->num_cmd_packets = 255; 7947 } 7948 #endif 7949