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 handle = hci_event_encryption_change_get_connection_handle(packet); 3276 conn = hci_connection_for_handle(handle); 3277 if (!conn) break; 3278 if (hci_event_encryption_change_get_status(packet) == 0u) { 3279 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3280 if (encryption_enabled){ 3281 if (hci_is_le_connection(conn)){ 3282 // For LE, we accept connection as encrypted 3283 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3284 } 3285 #ifdef ENABLE_CLASSIC 3286 else { 3287 3288 // dedicated bonding: send result and disconnect 3289 if (conn->bonding_flags & BONDING_DEDICATED){ 3290 conn->bonding_flags &= ~BONDING_DEDICATED; 3291 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3292 conn->bonding_status = packet[2]; 3293 break; 3294 } 3295 3296 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3297 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3298 bool connected_uses_aes_ccm = encryption_enabled == 2; 3299 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3300 log_info("SC during pairing, but only E0 now -> abort"); 3301 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3302 break; 3303 } 3304 3305 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3306 if (connected_uses_aes_ccm){ 3307 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3308 } 3309 3310 #ifdef ENABLE_TESTING_SUPPORT 3311 // work around for issue with PTS dongle 3312 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3313 #endif 3314 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3315 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3316 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3317 } else { 3318 // if not, pretend everything is perfect 3319 hci_handle_read_encryption_key_size_complete(conn, 16); 3320 } 3321 } 3322 #endif 3323 } else { 3324 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3325 } 3326 } 3327 3328 break; 3329 3330 #ifdef ENABLE_CLASSIC 3331 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3332 handle = hci_event_authentication_complete_get_connection_handle(packet); 3333 conn = hci_connection_for_handle(handle); 3334 if (!conn) break; 3335 3336 // clear authentication active flag 3337 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3338 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3339 3340 // authenticated only if auth status == 0 3341 if (hci_event_authentication_complete_get_status(packet) == 0){ 3342 // authenticated 3343 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3344 3345 // If not already encrypted, start encryption 3346 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3347 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3348 break; 3349 } 3350 } 3351 3352 // emit updated security level 3353 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3354 break; 3355 3356 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3357 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3358 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3359 if (!conn) break; 3360 3361 // treat successfully paired connection as authenticated 3362 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3363 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3364 } 3365 3366 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3367 break; 3368 #endif 3369 3370 // HCI_EVENT_DISCONNECTION_COMPLETE 3371 // has been split, to first notify stack before shutting connection down 3372 // see end of function, too. 3373 case HCI_EVENT_DISCONNECTION_COMPLETE: 3374 if (packet[2]) break; // status != 0 3375 handle = little_endian_read_16(packet, 3); 3376 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3377 if (hci_stack->acl_fragmentation_total_size > 0u) { 3378 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3379 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3380 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3381 hci_stack->acl_fragmentation_total_size = 0; 3382 hci_stack->acl_fragmentation_pos = 0; 3383 if (release_buffer){ 3384 hci_release_packet_buffer(); 3385 } 3386 } 3387 } 3388 3389 conn = hci_connection_for_handle(handle); 3390 if (!conn) break; 3391 #ifdef ENABLE_CLASSIC 3392 // pairing failed if it was ongoing 3393 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3394 #endif 3395 3396 // emit dedicatd bonding event 3397 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3398 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3399 } 3400 3401 // mark connection for shutdown, stop timers, reset state 3402 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3403 hci_connection_stop_timer(conn); 3404 hci_connection_init(conn); 3405 3406 #ifdef ENABLE_BLE 3407 #ifdef ENABLE_LE_PERIPHERAL 3408 // re-enable advertisements for le connections if active 3409 if (hci_is_le_connection(conn)){ 3410 hci_update_advertisements_enabled_for_current_roles(); 3411 } 3412 #endif 3413 #endif 3414 break; 3415 3416 case HCI_EVENT_HARDWARE_ERROR: 3417 log_error("Hardware Error: 0x%02x", packet[2]); 3418 if (hci_stack->hardware_error_callback){ 3419 (*hci_stack->hardware_error_callback)(packet[2]); 3420 } else { 3421 // if no special requests, just reboot stack 3422 hci_power_control_off(); 3423 hci_power_control_on(); 3424 } 3425 break; 3426 3427 #ifdef ENABLE_CLASSIC 3428 case HCI_EVENT_ROLE_CHANGE: 3429 if (packet[2]) break; // status != 0 3430 reverse_bd_addr(&packet[3], addr); 3431 addr_type = BD_ADDR_TYPE_ACL; 3432 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3433 if (!conn) break; 3434 conn->role = packet[9]; 3435 break; 3436 #endif 3437 3438 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3439 // release packet buffer only for asynchronous transport and if there are not further fragements 3440 if (hci_transport_synchronous()) { 3441 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3442 return; // instead of break: to avoid re-entering hci_run() 3443 } 3444 hci_stack->acl_fragmentation_tx_active = 0; 3445 if (hci_stack->acl_fragmentation_total_size) break; 3446 hci_release_packet_buffer(); 3447 3448 // L2CAP receives this event via the hci_emit_event below 3449 3450 #ifdef ENABLE_CLASSIC 3451 // For SCO, we do the can_send_now_check here 3452 hci_notify_if_sco_can_send_now(); 3453 #endif 3454 break; 3455 3456 #ifdef ENABLE_CLASSIC 3457 case HCI_EVENT_SCO_CAN_SEND_NOW: 3458 // For SCO, we do the can_send_now_check here 3459 hci_stack->sco_can_send_now = true; 3460 hci_notify_if_sco_can_send_now(); 3461 return; 3462 3463 // explode inquriy results for easier consumption 3464 case HCI_EVENT_INQUIRY_RESULT: 3465 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3466 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3467 gap_inquiry_explode(packet, size); 3468 break; 3469 #endif 3470 3471 #ifdef ENABLE_BLE 3472 case HCI_EVENT_LE_META: 3473 switch (packet[2]){ 3474 #ifdef ENABLE_LE_CENTRAL 3475 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3476 if (!hci_stack->le_scanning_enabled) break; 3477 le_handle_advertisement_report(packet, size); 3478 break; 3479 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3480 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3481 if (!hci_stack->le_scanning_enabled) break; 3482 le_handle_extended_advertisement_report(packet, size); 3483 break; 3484 #endif 3485 #endif 3486 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3487 event_handle_le_connection_complete(packet); 3488 break; 3489 3490 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3491 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3492 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3493 conn = hci_connection_for_handle(handle); 3494 if (!conn) break; 3495 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3496 break; 3497 3498 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3499 // connection 3500 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3501 conn = hci_connection_for_handle(handle); 3502 if (conn) { 3503 // read arguments 3504 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3505 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3506 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3507 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3508 3509 // validate against current connection parameter range 3510 le_connection_parameter_range_t existing_range; 3511 gap_get_connection_parameter_range(&existing_range); 3512 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3513 if (update_parameter){ 3514 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3515 conn->le_conn_interval_min = le_conn_interval_min; 3516 conn->le_conn_interval_max = le_conn_interval_max; 3517 conn->le_conn_latency = le_conn_latency; 3518 conn->le_supervision_timeout = le_supervision_timeout; 3519 } else { 3520 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3521 } 3522 } 3523 break; 3524 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3525 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3526 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3527 conn = hci_connection_for_handle(handle); 3528 if (conn) { 3529 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3530 } 3531 break; 3532 #endif 3533 default: 3534 break; 3535 } 3536 break; 3537 #endif 3538 case HCI_EVENT_VENDOR_SPECIFIC: 3539 // Vendor specific commands often create vendor specific event instead of num completed packets 3540 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3541 switch (hci_stack->manufacturer){ 3542 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3543 hci_stack->num_cmd_packets = 1; 3544 break; 3545 default: 3546 break; 3547 } 3548 break; 3549 default: 3550 break; 3551 } 3552 3553 handle_event_for_current_stack_state(packet, size); 3554 3555 // notify upper stack 3556 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3557 3558 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3559 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3560 handle = little_endian_read_16(packet, 3); 3561 hci_connection_t * aConn = hci_connection_for_handle(handle); 3562 // discard connection if app did not trigger a reconnect in the event handler 3563 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3564 hci_shutdown_connection(aConn); 3565 } 3566 } 3567 3568 // execute main loop 3569 hci_run(); 3570 } 3571 3572 #ifdef ENABLE_CLASSIC 3573 3574 #ifdef ENABLE_SCO_OVER_HCI 3575 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3576 static void sco_schedule_tx(hci_connection_t * conn); 3577 3578 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3579 log_debug("SCO TX Timeout"); 3580 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3581 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3582 if (!conn) return; 3583 3584 // trigger send 3585 conn->sco_tx_ready = 1; 3586 // extra packet if CVSD but SCO buffer is too short 3587 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3588 conn->sco_tx_ready++; 3589 } 3590 hci_notify_if_sco_can_send_now(); 3591 } 3592 3593 3594 #define SCO_TX_AFTER_RX_MS (6) 3595 3596 static void sco_schedule_tx(hci_connection_t * conn){ 3597 3598 uint32_t now = btstack_run_loop_get_time_ms(); 3599 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3600 int time_delta_ms = sco_tx_ms - now; 3601 3602 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3603 3604 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3605 btstack_run_loop_remove_timer(timer); 3606 btstack_run_loop_set_timer(timer, time_delta_ms); 3607 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3608 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3609 btstack_run_loop_add_timer(timer); 3610 } 3611 #endif 3612 3613 static void sco_handler(uint8_t * packet, uint16_t size){ 3614 // lookup connection struct 3615 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3616 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3617 if (!conn) return; 3618 3619 #ifdef ENABLE_SCO_OVER_HCI 3620 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3621 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3622 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3623 packet[2] = 0x3c; 3624 memmove(&packet[3], &packet[23], 63); 3625 size = 63; 3626 } 3627 } 3628 3629 if (hci_have_usb_transport()){ 3630 // Nothing to do 3631 } else { 3632 // 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); 3633 if (hci_stack->synchronous_flow_control_enabled == 0){ 3634 uint32_t now = btstack_run_loop_get_time_ms(); 3635 3636 if (!conn->sco_rx_valid){ 3637 // ignore first 10 packets 3638 conn->sco_rx_count++; 3639 // log_debug("sco rx count %u", conn->sco_rx_count); 3640 if (conn->sco_rx_count == 10) { 3641 // use first timestamp as is and pretent it just started 3642 conn->sco_rx_ms = now; 3643 conn->sco_rx_valid = 1; 3644 conn->sco_rx_count = 0; 3645 sco_schedule_tx(conn); 3646 } 3647 } else { 3648 // track expected arrival timme 3649 conn->sco_rx_count++; 3650 conn->sco_rx_ms += 7; 3651 int delta = (int32_t) (now - conn->sco_rx_ms); 3652 if (delta > 0){ 3653 conn->sco_rx_ms++; 3654 } 3655 // log_debug("sco rx %u", conn->sco_rx_ms); 3656 sco_schedule_tx(conn); 3657 } 3658 } 3659 } 3660 #endif 3661 3662 // deliver to app 3663 if (hci_stack->sco_packet_handler) { 3664 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3665 } 3666 3667 #ifdef HAVE_SCO_TRANSPORT 3668 // We can send one packet for each received packet 3669 conn->sco_tx_ready++; 3670 hci_notify_if_sco_can_send_now(); 3671 #endif 3672 3673 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3674 conn->num_packets_completed++; 3675 hci_stack->host_completed_packets = 1; 3676 hci_run(); 3677 #endif 3678 } 3679 #endif 3680 3681 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3682 hci_dump_packet(packet_type, 1, packet, size); 3683 switch (packet_type) { 3684 case HCI_EVENT_PACKET: 3685 event_handler(packet, size); 3686 break; 3687 case HCI_ACL_DATA_PACKET: 3688 acl_handler(packet, size); 3689 break; 3690 #ifdef ENABLE_CLASSIC 3691 case HCI_SCO_DATA_PACKET: 3692 sco_handler(packet, size); 3693 break; 3694 #endif 3695 default: 3696 break; 3697 } 3698 } 3699 3700 /** 3701 * @brief Add event packet handler. 3702 */ 3703 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3704 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3705 } 3706 3707 /** 3708 * @brief Remove event packet handler. 3709 */ 3710 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3711 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3712 } 3713 3714 /** Register HCI packet handlers */ 3715 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3716 hci_stack->acl_packet_handler = handler; 3717 } 3718 3719 #ifdef ENABLE_CLASSIC 3720 /** 3721 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3722 */ 3723 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3724 hci_stack->sco_packet_handler = handler; 3725 } 3726 #endif 3727 3728 static void hci_state_reset(void){ 3729 // no connections yet 3730 hci_stack->connections = NULL; 3731 3732 // keep discoverable/connectable as this has been requested by the client(s) 3733 // hci_stack->discoverable = 0; 3734 // hci_stack->connectable = 0; 3735 // hci_stack->bondable = 1; 3736 // hci_stack->own_addr_type = 0; 3737 3738 // buffer is free 3739 hci_stack->hci_packet_buffer_reserved = false; 3740 3741 // no pending cmds 3742 hci_stack->decline_reason = 0; 3743 3744 hci_stack->secure_connections_active = false; 3745 3746 #ifdef ENABLE_CLASSIC 3747 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3748 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3749 3750 hci_stack->gap_tasks_classic = 3751 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3752 GAP_TASK_SET_CLASS_OF_DEVICE | 3753 GAP_TASK_SET_LOCAL_NAME | 3754 GAP_TASK_SET_EIR_DATA | 3755 GAP_TASK_WRITE_SCAN_ENABLE | 3756 GAP_TASK_WRITE_PAGE_TIMEOUT; 3757 #endif 3758 3759 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3760 hci_stack->classic_read_local_oob_data = false; 3761 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3762 #endif 3763 3764 // LE 3765 #ifdef ENABLE_BLE 3766 memset(hci_stack->le_random_address, 0, 6); 3767 hci_stack->le_random_address_set = 0; 3768 #endif 3769 #ifdef ENABLE_LE_CENTRAL 3770 hci_stack->le_scanning_active = false; 3771 hci_stack->le_scanning_param_update = true; 3772 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3773 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3774 hci_stack->le_whitelist_capacity = 0; 3775 #endif 3776 #ifdef ENABLE_LE_PERIPHERAL 3777 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3778 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3779 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3780 } 3781 if (hci_stack->le_advertisements_data != NULL){ 3782 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3783 } 3784 #endif 3785 } 3786 3787 #ifdef ENABLE_CLASSIC 3788 /** 3789 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3790 */ 3791 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3792 // store and open remote device db 3793 hci_stack->link_key_db = link_key_db; 3794 if (hci_stack->link_key_db) { 3795 hci_stack->link_key_db->open(); 3796 } 3797 } 3798 #endif 3799 3800 void hci_init(const hci_transport_t *transport, const void *config){ 3801 3802 #ifdef HAVE_MALLOC 3803 if (!hci_stack) { 3804 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3805 } 3806 #else 3807 hci_stack = &hci_stack_static; 3808 #endif 3809 memset(hci_stack, 0, sizeof(hci_stack_t)); 3810 3811 // reference to use transport layer implementation 3812 hci_stack->hci_transport = transport; 3813 3814 // reference to used config 3815 hci_stack->config = config; 3816 3817 // setup pointer for outgoing packet buffer 3818 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3819 3820 // max acl payload size defined in config.h 3821 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3822 3823 // register packet handlers with transport 3824 transport->register_packet_handler(&packet_handler); 3825 3826 hci_stack->state = HCI_STATE_OFF; 3827 3828 // class of device 3829 hci_stack->class_of_device = 0x007a020c; // Smartphone 3830 3831 // bondable by default 3832 hci_stack->bondable = 1; 3833 3834 #ifdef ENABLE_CLASSIC 3835 // classic name 3836 hci_stack->local_name = default_classic_name; 3837 3838 // Master slave policy 3839 hci_stack->master_slave_policy = 1; 3840 3841 // Allow Role Switch 3842 hci_stack->allow_role_switch = 1; 3843 3844 // Default / minimum security level = 2 3845 hci_stack->gap_security_level = LEVEL_2; 3846 3847 // Default Security Mode 4 3848 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3849 3850 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3851 hci_stack->gap_required_encyrption_key_size = 7; 3852 3853 // Link Supervision Timeout 3854 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3855 3856 #endif 3857 3858 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3859 hci_stack->ssp_enable = 1; 3860 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3861 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3862 hci_stack->ssp_auto_accept = 1; 3863 3864 // Secure Connections: enable (requires support from Controller) 3865 hci_stack->secure_connections_enable = true; 3866 3867 // voice setting - signed 16 bit pcm data with CVSD over the air 3868 hci_stack->sco_voice_setting = 0x60; 3869 3870 #ifdef ENABLE_LE_CENTRAL 3871 // connection parameter to use for outgoing connections 3872 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3873 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3874 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3875 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3876 hci_stack->le_connection_latency = 4; // 4 3877 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3878 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3879 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3880 3881 // default LE Scanning 3882 hci_stack->le_scan_type = 0x1; // active 3883 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3884 hci_stack->le_scan_window = 0x30; // 30 ms 3885 #endif 3886 3887 #ifdef ENABLE_LE_PERIPHERAL 3888 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3889 #endif 3890 3891 // connection parameter range used to answer connection parameter update requests in l2cap 3892 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3893 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3894 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3895 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3896 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3897 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3898 3899 hci_state_reset(); 3900 } 3901 3902 void hci_deinit(void){ 3903 btstack_run_loop_remove_timer(&hci_stack->timeout); 3904 #ifdef HAVE_MALLOC 3905 if (hci_stack) { 3906 free(hci_stack); 3907 } 3908 #endif 3909 hci_stack = NULL; 3910 3911 #ifdef ENABLE_CLASSIC 3912 disable_l2cap_timeouts = 0; 3913 #endif 3914 } 3915 3916 /** 3917 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3918 */ 3919 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3920 hci_stack->chipset = chipset_driver; 3921 3922 // reset chipset driver - init is also called on power_up 3923 if (hci_stack->chipset && hci_stack->chipset->init){ 3924 hci_stack->chipset->init(hci_stack->config); 3925 } 3926 } 3927 3928 /** 3929 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3930 */ 3931 void hci_set_control(const btstack_control_t *hardware_control){ 3932 // references to used control implementation 3933 hci_stack->control = hardware_control; 3934 // init with transport config 3935 hardware_control->init(hci_stack->config); 3936 } 3937 3938 static void hci_discard_connections(void){ 3939 btstack_linked_list_iterator_t lit; 3940 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3941 while (btstack_linked_list_iterator_has_next(&lit)){ 3942 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3943 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3944 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3945 hci_shutdown_connection(connection); 3946 } 3947 } 3948 3949 void hci_close(void){ 3950 3951 #ifdef ENABLE_CLASSIC 3952 // close remote device db 3953 if (hci_stack->link_key_db) { 3954 hci_stack->link_key_db->close(); 3955 } 3956 #endif 3957 3958 hci_discard_connections(); 3959 3960 hci_power_control(HCI_POWER_OFF); 3961 3962 #ifdef HAVE_MALLOC 3963 free(hci_stack); 3964 #endif 3965 hci_stack = NULL; 3966 } 3967 3968 #ifdef HAVE_SCO_TRANSPORT 3969 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3970 hci_stack->sco_transport = sco_transport; 3971 sco_transport->register_packet_handler(&packet_handler); 3972 } 3973 #endif 3974 3975 #ifdef ENABLE_CLASSIC 3976 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3977 // validate ranage and set 3978 if (encryption_key_size < 7) return; 3979 if (encryption_key_size > 16) return; 3980 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3981 } 3982 3983 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3984 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3985 hci_stack->gap_security_mode = security_mode; 3986 return ERROR_CODE_SUCCESS; 3987 } else { 3988 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3989 } 3990 } 3991 3992 gap_security_mode_t gap_get_security_mode(void){ 3993 return hci_stack->gap_security_mode; 3994 } 3995 3996 void gap_set_security_level(gap_security_level_t security_level){ 3997 hci_stack->gap_security_level = security_level; 3998 } 3999 4000 gap_security_level_t gap_get_security_level(void){ 4001 if (hci_stack->gap_secure_connections_only_mode){ 4002 return LEVEL_4; 4003 } 4004 return hci_stack->gap_security_level; 4005 } 4006 4007 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4008 hci_stack->gap_minimal_service_security_level = security_level; 4009 } 4010 4011 void gap_set_secure_connections_only_mode(bool enable){ 4012 hci_stack->gap_secure_connections_only_mode = enable; 4013 } 4014 4015 bool gap_get_secure_connections_only_mode(void){ 4016 return hci_stack->gap_secure_connections_only_mode; 4017 } 4018 #endif 4019 4020 #ifdef ENABLE_CLASSIC 4021 void gap_set_class_of_device(uint32_t class_of_device){ 4022 hci_stack->class_of_device = class_of_device; 4023 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4024 hci_run(); 4025 } 4026 4027 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4028 hci_stack->default_link_policy_settings = default_link_policy_settings; 4029 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4030 hci_run(); 4031 } 4032 4033 void gap_set_allow_role_switch(bool allow_role_switch){ 4034 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4035 } 4036 4037 uint8_t hci_get_allow_role_switch(void){ 4038 return hci_stack->allow_role_switch; 4039 } 4040 4041 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4042 hci_stack->link_supervision_timeout = link_supervision_timeout; 4043 } 4044 4045 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4046 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4047 } 4048 4049 uint16_t hci_automatic_flush_timeout(void){ 4050 return hci_stack->automatic_flush_timeout; 4051 } 4052 4053 void hci_disable_l2cap_timeout_check(void){ 4054 disable_l2cap_timeouts = 1; 4055 } 4056 #endif 4057 4058 #ifndef HAVE_HOST_CONTROLLER_API 4059 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4060 void hci_set_bd_addr(bd_addr_t addr){ 4061 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4062 hci_stack->custom_bd_addr_set = 1; 4063 } 4064 #endif 4065 4066 // State-Module-Driver overview 4067 // state module low-level 4068 // HCI_STATE_OFF off close 4069 // HCI_STATE_INITIALIZING, on open 4070 // HCI_STATE_WORKING, on open 4071 // HCI_STATE_HALTING, on open 4072 // HCI_STATE_SLEEPING, off/sleep close 4073 // HCI_STATE_FALLING_ASLEEP on open 4074 4075 static int hci_power_control_on(void){ 4076 4077 // power on 4078 int err = 0; 4079 if (hci_stack->control && hci_stack->control->on){ 4080 err = (*hci_stack->control->on)(); 4081 } 4082 if (err){ 4083 log_error( "POWER_ON failed"); 4084 hci_emit_hci_open_failed(); 4085 return err; 4086 } 4087 4088 // int chipset driver 4089 if (hci_stack->chipset && hci_stack->chipset->init){ 4090 hci_stack->chipset->init(hci_stack->config); 4091 } 4092 4093 // init transport 4094 if (hci_stack->hci_transport->init){ 4095 hci_stack->hci_transport->init(hci_stack->config); 4096 } 4097 4098 // open transport 4099 err = hci_stack->hci_transport->open(); 4100 if (err){ 4101 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4102 if (hci_stack->control && hci_stack->control->off){ 4103 (*hci_stack->control->off)(); 4104 } 4105 hci_emit_hci_open_failed(); 4106 return err; 4107 } 4108 return 0; 4109 } 4110 4111 static void hci_power_control_off(void){ 4112 4113 log_info("hci_power_control_off"); 4114 4115 // close low-level device 4116 hci_stack->hci_transport->close(); 4117 4118 log_info("hci_power_control_off - hci_transport closed"); 4119 4120 // power off 4121 if (hci_stack->control && hci_stack->control->off){ 4122 (*hci_stack->control->off)(); 4123 } 4124 4125 log_info("hci_power_control_off - control closed"); 4126 4127 hci_stack->state = HCI_STATE_OFF; 4128 } 4129 4130 static void hci_power_control_sleep(void){ 4131 4132 log_info("hci_power_control_sleep"); 4133 4134 #if 0 4135 // don't close serial port during sleep 4136 4137 // close low-level device 4138 hci_stack->hci_transport->close(hci_stack->config); 4139 #endif 4140 4141 // sleep mode 4142 if (hci_stack->control && hci_stack->control->sleep){ 4143 (*hci_stack->control->sleep)(); 4144 } 4145 4146 hci_stack->state = HCI_STATE_SLEEPING; 4147 } 4148 4149 static int hci_power_control_wake(void){ 4150 4151 log_info("hci_power_control_wake"); 4152 4153 // wake on 4154 if (hci_stack->control && hci_stack->control->wake){ 4155 (*hci_stack->control->wake)(); 4156 } 4157 4158 #if 0 4159 // open low-level device 4160 int err = hci_stack->hci_transport->open(hci_stack->config); 4161 if (err){ 4162 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4163 if (hci_stack->control && hci_stack->control->off){ 4164 (*hci_stack->control->off)(); 4165 } 4166 hci_emit_hci_open_failed(); 4167 return err; 4168 } 4169 #endif 4170 4171 return 0; 4172 } 4173 4174 static void hci_power_enter_initializing_state(void){ 4175 // set up state machine 4176 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4177 hci_stack->hci_packet_buffer_reserved = false; 4178 hci_stack->state = HCI_STATE_INITIALIZING; 4179 hci_stack->substate = HCI_INIT_SEND_RESET; 4180 } 4181 4182 static void hci_power_enter_halting_state(void){ 4183 #ifdef ENABLE_BLE 4184 hci_whitelist_free(); 4185 #endif 4186 // see hci_run 4187 hci_stack->state = HCI_STATE_HALTING; 4188 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4189 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4190 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4191 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4192 btstack_run_loop_add_timer(&hci_stack->timeout); 4193 } 4194 4195 // returns error 4196 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4197 int err; 4198 switch (power_mode){ 4199 case HCI_POWER_ON: 4200 err = hci_power_control_on(); 4201 if (err != 0) { 4202 log_error("hci_power_control_on() error %d", err); 4203 return err; 4204 } 4205 hci_power_enter_initializing_state(); 4206 break; 4207 case HCI_POWER_OFF: 4208 // do nothing 4209 break; 4210 case HCI_POWER_SLEEP: 4211 // do nothing (with SLEEP == OFF) 4212 break; 4213 default: 4214 btstack_assert(false); 4215 break; 4216 } 4217 return ERROR_CODE_SUCCESS; 4218 } 4219 4220 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4221 switch (power_mode){ 4222 case HCI_POWER_ON: 4223 // do nothing 4224 break; 4225 case HCI_POWER_OFF: 4226 // no connections yet, just turn it off 4227 hci_power_control_off(); 4228 break; 4229 case HCI_POWER_SLEEP: 4230 // no connections yet, just turn it off 4231 hci_power_control_sleep(); 4232 break; 4233 default: 4234 btstack_assert(false); 4235 break; 4236 } 4237 return ERROR_CODE_SUCCESS; 4238 } 4239 4240 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4241 switch (power_mode){ 4242 case HCI_POWER_ON: 4243 // do nothing 4244 break; 4245 case HCI_POWER_OFF: 4246 hci_power_enter_halting_state(); 4247 break; 4248 case HCI_POWER_SLEEP: 4249 // see hci_run 4250 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4251 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4252 break; 4253 default: 4254 btstack_assert(false); 4255 break; 4256 } 4257 return ERROR_CODE_SUCCESS; 4258 } 4259 4260 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4261 switch (power_mode){ 4262 case HCI_POWER_ON: 4263 hci_power_enter_initializing_state(); 4264 break; 4265 case HCI_POWER_OFF: 4266 // do nothing 4267 break; 4268 case HCI_POWER_SLEEP: 4269 // see hci_run 4270 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4271 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4272 break; 4273 default: 4274 btstack_assert(false); 4275 break; 4276 } 4277 return ERROR_CODE_SUCCESS; 4278 } 4279 4280 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4281 switch (power_mode){ 4282 case HCI_POWER_ON: 4283 hci_power_enter_initializing_state(); 4284 break; 4285 case HCI_POWER_OFF: 4286 hci_power_enter_halting_state(); 4287 break; 4288 case HCI_POWER_SLEEP: 4289 // do nothing 4290 break; 4291 default: 4292 btstack_assert(false); 4293 break; 4294 } 4295 return ERROR_CODE_SUCCESS; 4296 } 4297 4298 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4299 int err; 4300 switch (power_mode){ 4301 case HCI_POWER_ON: 4302 err = hci_power_control_wake(); 4303 if (err) return err; 4304 hci_power_enter_initializing_state(); 4305 break; 4306 case HCI_POWER_OFF: 4307 hci_power_enter_halting_state(); 4308 break; 4309 case HCI_POWER_SLEEP: 4310 // do nothing 4311 break; 4312 default: 4313 btstack_assert(false); 4314 break; 4315 } 4316 return ERROR_CODE_SUCCESS; 4317 } 4318 4319 int hci_power_control(HCI_POWER_MODE power_mode){ 4320 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4321 int err = 0; 4322 switch (hci_stack->state){ 4323 case HCI_STATE_OFF: 4324 err = hci_power_control_state_off(power_mode); 4325 break; 4326 case HCI_STATE_INITIALIZING: 4327 err = hci_power_control_state_initializing(power_mode); 4328 break; 4329 case HCI_STATE_WORKING: 4330 err = hci_power_control_state_working(power_mode); 4331 break; 4332 case HCI_STATE_HALTING: 4333 err = hci_power_control_state_halting(power_mode); 4334 break; 4335 case HCI_STATE_FALLING_ASLEEP: 4336 err = hci_power_control_state_falling_asleep(power_mode); 4337 break; 4338 case HCI_STATE_SLEEPING: 4339 err = hci_power_control_state_sleeping(power_mode); 4340 break; 4341 default: 4342 btstack_assert(false); 4343 break; 4344 } 4345 if (err != 0){ 4346 return err; 4347 } 4348 4349 // create internal event 4350 hci_emit_state(); 4351 4352 // trigger next/first action 4353 hci_run(); 4354 4355 return 0; 4356 } 4357 4358 4359 static void hci_halting_run(void) { 4360 4361 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4362 4363 hci_connection_t *connection; 4364 #ifdef ENABLE_BLE 4365 #ifdef ENABLE_LE_PERIPHERAL 4366 bool stop_advertismenets; 4367 #endif 4368 #endif 4369 4370 switch (hci_stack->substate) { 4371 case HCI_HALTING_CLASSIC_STOP: 4372 #ifdef ENABLE_CLASSIC 4373 if (!hci_can_send_command_packet_now()) return; 4374 4375 if (hci_stack->connectable || hci_stack->discoverable){ 4376 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4377 hci_send_cmd(&hci_write_scan_enable, 0); 4378 return; 4379 } 4380 #endif 4381 /* fall through */ 4382 4383 case HCI_HALTING_LE_ADV_STOP: 4384 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4385 4386 #ifdef ENABLE_BLE 4387 #ifdef ENABLE_LE_PERIPHERAL 4388 if (!hci_can_send_command_packet_now()) return; 4389 4390 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4391 4392 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4393 if (hci_extended_advertising_supported()){ 4394 btstack_linked_list_iterator_t it; 4395 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4396 // stop all periodic advertisements and check if an extended set is active 4397 while (btstack_linked_list_iterator_has_next(&it)){ 4398 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4399 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4400 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4401 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4402 return; 4403 } 4404 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4405 stop_advertismenets = true; 4406 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4407 } 4408 } 4409 if (stop_advertismenets){ 4410 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4411 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4412 return; 4413 } 4414 } 4415 else 4416 #else 4417 { 4418 if (stop_advertismenets) { 4419 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4420 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4421 return; 4422 } 4423 } 4424 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4425 #endif /* ENABLE_LE_PERIPHERAL */ 4426 #endif /* ENABLE_BLE */ 4427 4428 /* fall through */ 4429 4430 case HCI_HALTING_LE_SCAN_STOP: 4431 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4432 if (!hci_can_send_command_packet_now()) return; 4433 4434 #ifdef ENABLE_BLE 4435 #ifdef ENABLE_LE_CENTRAL 4436 if (hci_stack->le_scanning_active){ 4437 hci_le_scan_stop(); 4438 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4439 return; 4440 } 4441 #endif 4442 #endif 4443 4444 /* fall through */ 4445 4446 case HCI_HALTING_DISCONNECT_ALL: 4447 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4448 if (!hci_can_send_command_packet_now()) return; 4449 4450 // close all open connections 4451 connection = (hci_connection_t *) hci_stack->connections; 4452 if (connection) { 4453 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4454 4455 // check state 4456 if (connection->state == SENT_DISCONNECT) return; 4457 connection->state = SENT_DISCONNECT; 4458 4459 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4460 4461 // finally, send the disconnect command 4462 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4463 return; 4464 } 4465 4466 btstack_run_loop_remove_timer(&hci_stack->timeout); 4467 4468 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4469 4470 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4471 log_info("HCI_STATE_HALTING: wait 50 ms"); 4472 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4473 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4474 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4475 btstack_run_loop_add_timer(&hci_stack->timeout); 4476 break; 4477 4478 case HCI_HALTING_CLOSE: 4479 // close left over connections (that had not been properly closed before) 4480 hci_discard_connections(); 4481 4482 log_info("HCI_STATE_HALTING, calling off"); 4483 4484 // switch mode 4485 hci_power_control_off(); 4486 4487 log_info("HCI_STATE_HALTING, emitting state"); 4488 hci_emit_state(); 4489 log_info("HCI_STATE_HALTING, done"); 4490 break; 4491 4492 case HCI_HALTING_W4_CLOSE_TIMER: 4493 // keep waiting 4494 4495 break; 4496 default: 4497 break; 4498 } 4499 }; 4500 4501 static void hci_falling_asleep_run(void){ 4502 hci_connection_t * connection; 4503 switch(hci_stack->substate) { 4504 case HCI_FALLING_ASLEEP_DISCONNECT: 4505 log_info("HCI_STATE_FALLING_ASLEEP"); 4506 // close all open connections 4507 connection = (hci_connection_t *) hci_stack->connections; 4508 if (connection){ 4509 4510 // send disconnect 4511 if (!hci_can_send_command_packet_now()) return; 4512 4513 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4514 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4515 4516 // send disconnected event right away - causes higher layer connections to get closed, too. 4517 hci_shutdown_connection(connection); 4518 return; 4519 } 4520 4521 if (hci_classic_supported()){ 4522 // disable page and inquiry scan 4523 if (!hci_can_send_command_packet_now()) return; 4524 4525 log_info("HCI_STATE_HALTING, disabling inq scans"); 4526 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4527 4528 // continue in next sub state 4529 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4530 break; 4531 } 4532 4533 /* fall through */ 4534 4535 case HCI_FALLING_ASLEEP_COMPLETE: 4536 log_info("HCI_STATE_HALTING, calling sleep"); 4537 // switch mode 4538 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4539 hci_emit_state(); 4540 break; 4541 4542 default: 4543 break; 4544 } 4545 } 4546 4547 #ifdef ENABLE_CLASSIC 4548 4549 static void hci_update_scan_enable(void){ 4550 // 2 = page scan, 1 = inq scan 4551 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4552 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4553 hci_run(); 4554 } 4555 4556 void gap_discoverable_control(uint8_t enable){ 4557 if (enable) enable = 1; // normalize argument 4558 4559 if (hci_stack->discoverable == enable){ 4560 hci_emit_discoverable_enabled(hci_stack->discoverable); 4561 return; 4562 } 4563 4564 hci_stack->discoverable = enable; 4565 hci_update_scan_enable(); 4566 } 4567 4568 void gap_connectable_control(uint8_t enable){ 4569 if (enable) enable = 1; // normalize argument 4570 4571 // don't emit event 4572 if (hci_stack->connectable == enable) return; 4573 4574 hci_stack->connectable = enable; 4575 hci_update_scan_enable(); 4576 } 4577 #endif 4578 4579 void gap_local_bd_addr(bd_addr_t address_buffer){ 4580 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4581 } 4582 4583 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4584 static void hci_host_num_completed_packets(void){ 4585 4586 // create packet manually as arrays are not supported and num_commands should not get reduced 4587 hci_reserve_packet_buffer(); 4588 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4589 4590 uint16_t size = 0; 4591 uint16_t num_handles = 0; 4592 packet[size++] = 0x35; 4593 packet[size++] = 0x0c; 4594 size++; // skip param len 4595 size++; // skip num handles 4596 4597 // add { handle, packets } entries 4598 btstack_linked_item_t * it; 4599 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4600 hci_connection_t * connection = (hci_connection_t *) it; 4601 if (connection->num_packets_completed){ 4602 little_endian_store_16(packet, size, connection->con_handle); 4603 size += 2; 4604 little_endian_store_16(packet, size, connection->num_packets_completed); 4605 size += 2; 4606 // 4607 num_handles++; 4608 connection->num_packets_completed = 0; 4609 } 4610 } 4611 4612 packet[2] = size - 3; 4613 packet[3] = num_handles; 4614 4615 hci_stack->host_completed_packets = 0; 4616 4617 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4618 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4619 4620 // release packet buffer for synchronous transport implementations 4621 if (hci_transport_synchronous()){ 4622 hci_release_packet_buffer(); 4623 hci_emit_transport_packet_sent(); 4624 } 4625 } 4626 #endif 4627 4628 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4629 UNUSED(ds); 4630 hci_stack->substate = HCI_HALTING_CLOSE; 4631 // allow packet handlers to defer final shutdown 4632 hci_emit_state(); 4633 hci_run(); 4634 } 4635 4636 static bool hci_run_acl_fragments(void){ 4637 if (hci_stack->acl_fragmentation_total_size > 0u) { 4638 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4639 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4640 if (connection) { 4641 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4642 hci_send_acl_packet_fragments(connection); 4643 return true; 4644 } 4645 } else { 4646 // connection gone -> discard further fragments 4647 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4648 hci_stack->acl_fragmentation_total_size = 0; 4649 hci_stack->acl_fragmentation_pos = 0; 4650 } 4651 } 4652 return false; 4653 } 4654 4655 #ifdef ENABLE_CLASSIC 4656 4657 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4658 static bool hci_classic_operation_active(void) { 4659 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4660 return true; 4661 } 4662 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4663 return true; 4664 } 4665 btstack_linked_item_t * it; 4666 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4667 hci_connection_t *connection = (hci_connection_t *) it; 4668 switch (connection->state) { 4669 case SENT_CREATE_CONNECTION: 4670 case SENT_CANCEL_CONNECTION: 4671 case SENT_DISCONNECT: 4672 return true; 4673 default: 4674 break; 4675 } 4676 } 4677 return false; 4678 } 4679 #endif 4680 4681 static bool hci_run_general_gap_classic(void){ 4682 4683 // assert stack is working and classic is active 4684 if (hci_classic_supported() == false) return false; 4685 if (hci_stack->state != HCI_STATE_WORKING) return false; 4686 4687 // decline incoming connections 4688 if (hci_stack->decline_reason){ 4689 uint8_t reason = hci_stack->decline_reason; 4690 hci_stack->decline_reason = 0; 4691 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4692 return true; 4693 } 4694 4695 if (hci_stack->gap_tasks_classic != 0){ 4696 hci_run_gap_tasks_classic(); 4697 return true; 4698 } 4699 4700 // start/stop inquiry 4701 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4702 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4703 if (hci_classic_operation_active() == false) 4704 #endif 4705 { 4706 uint8_t duration = hci_stack->inquiry_state; 4707 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4708 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4709 return true; 4710 } 4711 } 4712 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4713 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4714 hci_send_cmd(&hci_inquiry_cancel); 4715 return true; 4716 } 4717 // remote name request 4718 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4719 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4720 if (hci_classic_operation_active() == false) 4721 #endif 4722 { 4723 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4724 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4725 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4726 return true; 4727 } 4728 } 4729 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4730 // Local OOB data 4731 if (hci_stack->classic_read_local_oob_data){ 4732 hci_stack->classic_read_local_oob_data = false; 4733 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4734 hci_send_cmd(&hci_read_local_extended_oob_data); 4735 } else { 4736 hci_send_cmd(&hci_read_local_oob_data); 4737 } 4738 } 4739 #endif 4740 // pairing 4741 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4742 uint8_t state = hci_stack->gap_pairing_state; 4743 uint8_t pin_code[16]; 4744 switch (state){ 4745 case GAP_PAIRING_STATE_SEND_PIN: 4746 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4747 memset(pin_code, 0, 16); 4748 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4749 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4750 break; 4751 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4752 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4753 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4754 break; 4755 case GAP_PAIRING_STATE_SEND_PASSKEY: 4756 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4757 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4758 break; 4759 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4760 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4761 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4762 break; 4763 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4764 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4765 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4766 break; 4767 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4768 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4769 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4770 break; 4771 default: 4772 break; 4773 } 4774 return true; 4775 } 4776 return false; 4777 } 4778 #endif 4779 4780 #ifdef ENABLE_BLE 4781 4782 #ifdef ENABLE_LE_CENTRAL 4783 static void hci_le_scan_stop(void){ 4784 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4785 if (hci_extended_advertising_supported()) { 4786 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4787 } else 4788 #endif 4789 { 4790 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4791 } 4792 } 4793 #endif 4794 4795 #ifdef ENABLE_LE_PERIPHERAL 4796 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4797 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4798 uint8_t operation = 0; 4799 if (pos == 0){ 4800 // first fragment or complete data 4801 operation |= 1; 4802 } 4803 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4804 // last fragment or complete data 4805 operation |= 2; 4806 } 4807 return operation; 4808 } 4809 #endif 4810 #endif 4811 4812 static bool hci_run_general_gap_le(void){ 4813 4814 // Phase 1: collect what to stop 4815 4816 bool scanning_stop = false; 4817 bool connecting_stop = false; 4818 bool advertising_stop = false; 4819 4820 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4821 le_advertising_set_t * advertising_stop_set = NULL; 4822 bool periodic_stop = false; 4823 #endif 4824 4825 #ifndef ENABLE_LE_CENTRAL 4826 UNUSED(scanning_stop); 4827 UNUSED(connecting_stop); 4828 #endif 4829 #ifndef ENABLE_LE_PERIPHERAL 4830 UNUSED(advertising_stop); 4831 #endif 4832 4833 // check if own address changes 4834 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4835 4836 // check if whitelist needs modification 4837 bool whitelist_modification_pending = false; 4838 btstack_linked_list_iterator_t lit; 4839 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4840 while (btstack_linked_list_iterator_has_next(&lit)){ 4841 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4842 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4843 whitelist_modification_pending = true; 4844 break; 4845 } 4846 } 4847 // check if resolving list needs modification 4848 bool resolving_list_modification_pending = false; 4849 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4850 4851 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4852 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4853 resolving_list_modification_pending = true; 4854 } 4855 #endif 4856 4857 #ifdef ENABLE_LE_CENTRAL 4858 // scanning control 4859 if (hci_stack->le_scanning_active) { 4860 // stop if: 4861 // - parameter change required 4862 // - it's disabled 4863 // - whitelist change required but used for scanning 4864 // - resolving list modified 4865 // - own address changes 4866 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4867 if ((hci_stack->le_scanning_param_update) || 4868 !hci_stack->le_scanning_enabled || 4869 (scanning_uses_whitelist && whitelist_modification_pending) || 4870 resolving_list_modification_pending || 4871 random_address_change){ 4872 4873 scanning_stop = true; 4874 } 4875 } 4876 #endif 4877 4878 #ifdef ENABLE_LE_CENTRAL 4879 // connecting control 4880 bool connecting_with_whitelist; 4881 switch (hci_stack->le_connecting_state){ 4882 case LE_CONNECTING_DIRECT: 4883 case LE_CONNECTING_WHITELIST: 4884 // stop connecting if: 4885 // - connecting uses white and whitelist modification pending 4886 // - if it got disabled 4887 // - resolving list modified 4888 // - own address changes 4889 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4890 if ((connecting_with_whitelist && whitelist_modification_pending) || 4891 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4892 resolving_list_modification_pending || 4893 random_address_change) { 4894 4895 connecting_stop = true; 4896 } 4897 break; 4898 default: 4899 break; 4900 } 4901 #endif 4902 4903 #ifdef ENABLE_LE_PERIPHERAL 4904 // le advertisement control 4905 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4906 // stop if: 4907 // - parameter change required 4908 // - random address used in advertising and changes 4909 // - it's disabled 4910 // - whitelist change required but used for advertisement filter policy 4911 // - resolving list modified 4912 // - own address changes 4913 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4914 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4915 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4916 if (advertising_change || 4917 (advertising_uses_random_address && random_address_change) || 4918 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4919 (advertising_uses_whitelist && whitelist_modification_pending) || 4920 resolving_list_modification_pending || 4921 random_address_change) { 4922 4923 advertising_stop = true; 4924 } 4925 } 4926 4927 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4928 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4929 btstack_linked_list_iterator_t it; 4930 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4931 while (btstack_linked_list_iterator_has_next(&it)){ 4932 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4933 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4934 // stop if: 4935 // - parameter change required 4936 // - random address used in connectable advertising and changes 4937 // - it's disabled 4938 // - whitelist change required but used for advertisement filter policy 4939 // - resolving list modified 4940 // - own address changes 4941 // - advertisement set will be removed 4942 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4943 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4944 bool advertising_uses_random_address = 4945 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 4946 advertising_connectable; 4947 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4948 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4949 bool advertising_set_random_address_change = 4950 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4951 bool advertising_set_will_be_removed = 4952 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4953 if (advertising_parameter_change || 4954 (advertising_uses_random_address && advertising_set_random_address_change) || 4955 (advertising_enabled == false) || 4956 (advertising_uses_whitelist && whitelist_modification_pending) || 4957 resolving_list_modification_pending || 4958 advertising_set_will_be_removed) { 4959 4960 advertising_stop = true; 4961 advertising_stop_set = advertising_set; 4962 break; 4963 } 4964 } 4965 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4966 // stop if: 4967 // - it's disabled 4968 // - parameter change required 4969 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 4970 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 4971 if ((periodic_enabled == false) || periodic_parameter_change){ 4972 periodic_stop = true; 4973 advertising_stop_set = advertising_set; 4974 } 4975 } 4976 } 4977 } 4978 #endif 4979 4980 #endif 4981 4982 4983 // Phase 2: stop everything that should be off during modifications 4984 4985 #ifdef ENABLE_LE_CENTRAL 4986 if (scanning_stop){ 4987 hci_stack->le_scanning_active = false; 4988 hci_le_scan_stop(); 4989 return true; 4990 } 4991 #endif 4992 4993 #ifdef ENABLE_LE_CENTRAL 4994 if (connecting_stop){ 4995 hci_send_cmd(&hci_le_create_connection_cancel); 4996 return true; 4997 } 4998 #endif 4999 5000 #ifdef ENABLE_LE_PERIPHERAL 5001 if (advertising_stop){ 5002 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5003 if (hci_extended_advertising_supported()) { 5004 uint8_t advertising_stop_handle; 5005 if (advertising_stop_set != NULL){ 5006 advertising_stop_handle = advertising_stop_set->advertising_handle; 5007 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5008 } else { 5009 advertising_stop_handle = 0; 5010 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5011 } 5012 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5013 const uint16_t durations[] = { 0 }; 5014 const uint16_t max_events[] = { 0 }; 5015 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5016 } else 5017 #endif 5018 { 5019 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5020 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5021 } 5022 return true; 5023 } 5024 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5025 if (periodic_stop){ 5026 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5027 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5028 return true; 5029 } 5030 #endif 5031 #endif 5032 5033 // Phase 3: modify 5034 5035 if (random_address_change){ 5036 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5037 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5038 if (hci_extended_advertising_supported()) { 5039 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5040 } 5041 #endif 5042 { 5043 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5044 } 5045 return true; 5046 } 5047 5048 #ifdef ENABLE_LE_CENTRAL 5049 if (hci_stack->le_scanning_param_update){ 5050 hci_stack->le_scanning_param_update = false; 5051 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5052 if (hci_extended_advertising_supported()){ 5053 // prepare arrays for all PHYs 5054 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5055 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5056 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5057 uint8_t scanning_phys = 1; // LE 1M PHY 5058 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5059 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5060 } else 5061 #endif 5062 { 5063 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5064 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5065 } 5066 return true; 5067 } 5068 #endif 5069 5070 #ifdef ENABLE_LE_PERIPHERAL 5071 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5072 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5073 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5074 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5075 if (hci_extended_advertising_supported()){ 5076 // map advertisment type to advertising event properties 5077 uint16_t adv_event_properties = 0; 5078 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5079 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5080 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5081 } 5082 hci_stack->le_advertising_set_in_current_command = 0; 5083 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5084 0, 5085 adv_event_properties, 5086 hci_stack->le_advertisements_interval_min, 5087 hci_stack->le_advertisements_interval_max, 5088 hci_stack->le_advertisements_channel_map, 5089 hci_stack->le_advertisements_own_addr_type, 5090 hci_stack->le_advertisements_direct_address_type, 5091 hci_stack->le_advertisements_direct_address, 5092 hci_stack->le_advertisements_filter_policy, 5093 0x7f, // tx power: no preference 5094 0x01, // primary adv phy: LE 1M 5095 0, // secondary adv max skip 5096 0, // secondary adv phy 5097 0, // adv sid 5098 0 // scan request notification 5099 ); 5100 } 5101 #endif 5102 { 5103 hci_send_cmd(&hci_le_set_advertising_parameters, 5104 hci_stack->le_advertisements_interval_min, 5105 hci_stack->le_advertisements_interval_max, 5106 hci_stack->le_advertisements_type, 5107 hci_stack->le_advertisements_own_addr_type, 5108 hci_stack->le_advertisements_direct_address_type, 5109 hci_stack->le_advertisements_direct_address, 5110 hci_stack->le_advertisements_channel_map, 5111 hci_stack->le_advertisements_filter_policy); 5112 } 5113 return true; 5114 } 5115 5116 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5117 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5118 uint8_t adv_data_clean[31]; 5119 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5120 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5121 hci_stack->le_advertisements_data_len); 5122 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5123 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5124 if (hci_extended_advertising_supported()){ 5125 hci_stack->le_advertising_set_in_current_command = 0; 5126 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5127 } else 5128 #endif 5129 { 5130 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5131 } 5132 return true; 5133 } 5134 5135 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5136 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5137 uint8_t scan_data_clean[31]; 5138 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5139 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5140 hci_stack->le_scan_response_data_len); 5141 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5142 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5143 if (hci_extended_advertising_supported()){ 5144 hci_stack->le_advertising_set_in_current_command = 0; 5145 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5146 } else 5147 #endif 5148 { 5149 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5150 } 5151 return true; 5152 } 5153 5154 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5155 if (hci_extended_advertising_supported()) { 5156 btstack_linked_list_iterator_t it; 5157 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5158 while (btstack_linked_list_iterator_has_next(&it)){ 5159 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5160 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5161 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5162 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5163 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5164 return true; 5165 } 5166 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5167 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5168 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5169 return true; 5170 } 5171 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5172 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5173 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5174 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5175 advertising_set->advertising_handle, 5176 advertising_set->extended_params.advertising_event_properties, 5177 advertising_set->extended_params.primary_advertising_interval_min, 5178 advertising_set->extended_params.primary_advertising_interval_max, 5179 advertising_set->extended_params.primary_advertising_channel_map, 5180 advertising_set->extended_params.own_address_type, 5181 advertising_set->extended_params.peer_address_type, 5182 advertising_set->extended_params.peer_address, 5183 advertising_set->extended_params.advertising_filter_policy, 5184 advertising_set->extended_params.advertising_tx_power, 5185 advertising_set->extended_params.primary_advertising_phy, 5186 advertising_set->extended_params.secondary_advertising_max_skip, 5187 advertising_set->extended_params.secondary_advertising_phy, 5188 advertising_set->extended_params.advertising_sid, 5189 advertising_set->extended_params.scan_request_notification_enable 5190 ); 5191 return true; 5192 } 5193 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5194 uint16_t pos = advertising_set->adv_data_pos; 5195 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5196 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5197 if ((operation & 0x02) != 0){ 5198 // last fragment or complete data 5199 operation |= 2; 5200 advertising_set->adv_data_pos = 0; 5201 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5202 } else { 5203 advertising_set->adv_data_pos += data_to_upload; 5204 } 5205 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5206 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5207 return true; 5208 } 5209 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5210 uint16_t pos = advertising_set->scan_data_pos; 5211 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5212 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5213 if ((operation & 0x02) != 0){ 5214 advertising_set->scan_data_pos = 0; 5215 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5216 } else { 5217 advertising_set->scan_data_pos += data_to_upload; 5218 } 5219 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5220 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5221 return true; 5222 } 5223 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5224 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5225 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5226 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5227 advertising_set->advertising_handle, 5228 advertising_set->periodic_params.periodic_advertising_interval_min, 5229 advertising_set->periodic_params.periodic_advertising_interval_max, 5230 advertising_set->periodic_params.periodic_advertising_properties); 5231 return true; 5232 } 5233 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5234 uint16_t pos = advertising_set->periodic_data_pos; 5235 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5236 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5237 if ((operation & 0x02) != 0){ 5238 // last fragment or complete data 5239 operation |= 2; 5240 advertising_set->periodic_data_pos = 0; 5241 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5242 } else { 5243 advertising_set->periodic_data_pos += data_to_upload; 5244 } 5245 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5246 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5247 return true; 5248 } 5249 } 5250 } 5251 #endif 5252 5253 5254 #endif 5255 5256 5257 #ifdef ENABLE_LE_CENTRAL 5258 // if connect with whitelist was active and is not cancelled yet, wait until next time 5259 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5260 #endif 5261 5262 // LE Whitelist Management 5263 if (whitelist_modification_pending){ 5264 // add/remove entries 5265 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5266 while (btstack_linked_list_iterator_has_next(&lit)){ 5267 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5268 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5269 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5270 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5271 return true; 5272 } 5273 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5274 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5275 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5276 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5277 return true; 5278 } 5279 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5280 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5281 btstack_memory_whitelist_entry_free(entry); 5282 } 5283 } 5284 } 5285 5286 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5287 // LE Resolving List Management 5288 if (resolving_list_supported) { 5289 uint16_t i; 5290 switch (hci_stack->le_resolving_list_state) { 5291 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5292 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5293 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5294 return true; 5295 case LE_RESOLVING_LIST_READ_SIZE: 5296 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5297 hci_send_cmd(&hci_le_read_resolving_list_size); 5298 return true; 5299 case LE_RESOLVING_LIST_SEND_CLEAR: 5300 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5301 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5302 sizeof(hci_stack->le_resolving_list_add_entries)); 5303 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5304 sizeof(hci_stack->le_resolving_list_remove_entries)); 5305 hci_send_cmd(&hci_le_clear_resolving_list); 5306 return true; 5307 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5308 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5309 uint8_t offset = i >> 3; 5310 uint8_t mask = 1 << (i & 7); 5311 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5312 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5313 bd_addr_t peer_identity_addreses; 5314 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5315 sm_key_t peer_irk; 5316 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5317 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5318 5319 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5320 // trigger whitelist entry 'update' (work around for controller bug) 5321 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5322 while (btstack_linked_list_iterator_has_next(&lit)) { 5323 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5324 if (entry->address_type != peer_identity_addr_type) continue; 5325 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5326 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5327 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5328 } 5329 #endif 5330 5331 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5332 peer_identity_addreses); 5333 return true; 5334 } 5335 5336 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5337 5338 /* fall through */ 5339 5340 case LE_RESOLVING_LIST_ADD_ENTRIES: 5341 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5342 uint8_t offset = i >> 3; 5343 uint8_t mask = 1 << (i & 7); 5344 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5345 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5346 bd_addr_t peer_identity_addreses; 5347 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5348 sm_key_t peer_irk; 5349 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5350 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5351 const uint8_t *local_irk = gap_get_persistent_irk(); 5352 // command uses format specifier 'P' that stores 16-byte value without flip 5353 uint8_t local_irk_flipped[16]; 5354 uint8_t peer_irk_flipped[16]; 5355 reverse_128(local_irk, local_irk_flipped); 5356 reverse_128(peer_irk, peer_irk_flipped); 5357 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5358 peer_irk_flipped, local_irk_flipped); 5359 return true; 5360 } 5361 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5362 break; 5363 5364 default: 5365 break; 5366 } 5367 } 5368 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5369 #endif 5370 5371 // post-pone all actions until stack is fully working 5372 if (hci_stack->state != HCI_STATE_WORKING) return false; 5373 5374 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5375 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5376 5377 // Phase 4: restore state 5378 5379 #ifdef ENABLE_LE_CENTRAL 5380 // re-start scanning 5381 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5382 hci_stack->le_scanning_active = true; 5383 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5384 if (hci_extended_advertising_supported()){ 5385 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5386 } else 5387 #endif 5388 { 5389 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5390 } 5391 return true; 5392 } 5393 #endif 5394 5395 #ifdef ENABLE_LE_CENTRAL 5396 // re-start connecting 5397 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5398 bd_addr_t null_addr; 5399 memset(null_addr, 0, 6); 5400 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5401 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5402 hci_send_cmd(&hci_le_create_connection, 5403 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5404 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5405 1, // use whitelist 5406 0, // peer address type 5407 null_addr, // peer bd addr 5408 hci_stack->le_connection_own_addr_type, // our addr type: 5409 hci_stack->le_connection_interval_min, // conn interval min 5410 hci_stack->le_connection_interval_max, // conn interval max 5411 hci_stack->le_connection_latency, // conn latency 5412 hci_stack->le_supervision_timeout, // conn latency 5413 hci_stack->le_minimum_ce_length, // min ce length 5414 hci_stack->le_maximum_ce_length // max ce length 5415 ); 5416 return true; 5417 } 5418 #endif 5419 5420 #ifdef ENABLE_LE_PERIPHERAL 5421 // re-start advertising 5422 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5423 // check if advertisements should be enabled given 5424 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5425 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5426 5427 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5428 if (hci_extended_advertising_supported()){ 5429 const uint8_t advertising_handles[] = { 0 }; 5430 const uint16_t durations[] = { 0 }; 5431 const uint16_t max_events[] = { 0 }; 5432 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5433 } else 5434 #endif 5435 { 5436 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5437 } 5438 return true; 5439 } 5440 5441 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5442 if (hci_extended_advertising_supported()) { 5443 btstack_linked_list_iterator_t it; 5444 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5445 while (btstack_linked_list_iterator_has_next(&it)) { 5446 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5447 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5448 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5449 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5450 const uint16_t durations[] = { advertising_set->enable_timeout }; 5451 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5452 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5453 return true; 5454 } 5455 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5456 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5457 uint8_t enable = 1; 5458 if (advertising_set->periodic_include_adi){ 5459 enable |= 2; 5460 } 5461 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5462 return true; 5463 } 5464 } 5465 } 5466 #endif 5467 #endif 5468 5469 return false; 5470 } 5471 #endif 5472 5473 static bool hci_run_general_pending_commands(void){ 5474 btstack_linked_item_t * it; 5475 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5476 hci_connection_t * connection = (hci_connection_t *) it; 5477 5478 switch(connection->state){ 5479 case SEND_CREATE_CONNECTION: 5480 switch(connection->address_type){ 5481 #ifdef ENABLE_CLASSIC 5482 case BD_ADDR_TYPE_ACL: 5483 log_info("sending hci_create_connection"); 5484 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5485 break; 5486 #endif 5487 default: 5488 #ifdef ENABLE_BLE 5489 #ifdef ENABLE_LE_CENTRAL 5490 log_info("sending hci_le_create_connection"); 5491 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5492 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5493 hci_send_cmd(&hci_le_create_connection, 5494 hci_stack->le_connection_scan_interval, // conn scan interval 5495 hci_stack->le_connection_scan_window, // conn scan windows 5496 0, // don't use whitelist 5497 connection->address_type, // peer address type 5498 connection->address, // peer bd addr 5499 hci_stack->le_connection_own_addr_type, // our addr type: 5500 hci_stack->le_connection_interval_min, // conn interval min 5501 hci_stack->le_connection_interval_max, // conn interval max 5502 hci_stack->le_connection_latency, // conn latency 5503 hci_stack->le_supervision_timeout, // conn latency 5504 hci_stack->le_minimum_ce_length, // min ce length 5505 hci_stack->le_maximum_ce_length // max ce length 5506 ); 5507 connection->state = SENT_CREATE_CONNECTION; 5508 #endif 5509 #endif 5510 break; 5511 } 5512 return true; 5513 5514 #ifdef ENABLE_CLASSIC 5515 case RECEIVED_CONNECTION_REQUEST: 5516 connection->role = HCI_ROLE_SLAVE; 5517 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5518 log_info("sending hci_accept_connection_request"); 5519 connection->state = ACCEPTED_CONNECTION_REQUEST; 5520 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5521 return true; 5522 } 5523 break; 5524 #endif 5525 5526 #ifdef ENABLE_BLE 5527 #ifdef ENABLE_LE_CENTRAL 5528 case SEND_CANCEL_CONNECTION: 5529 connection->state = SENT_CANCEL_CONNECTION; 5530 hci_send_cmd(&hci_le_create_connection_cancel); 5531 return true; 5532 #endif 5533 #endif 5534 case SEND_DISCONNECT: 5535 connection->state = SENT_DISCONNECT; 5536 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5537 return true; 5538 5539 default: 5540 break; 5541 } 5542 5543 // no further commands if connection is about to get shut down 5544 if (connection->state == SENT_DISCONNECT) continue; 5545 5546 #ifdef ENABLE_CLASSIC 5547 5548 // Handling link key request requires remote supported features 5549 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5550 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5551 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5552 5553 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5554 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5555 if (have_link_key && security_level_sufficient){ 5556 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5557 } else { 5558 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5559 } 5560 return true; 5561 } 5562 5563 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5564 log_info("denying to pin request"); 5565 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5566 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5567 return true; 5568 } 5569 5570 // security assessment requires remote features 5571 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5572 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5573 hci_ssp_assess_security_on_io_cap_request(connection); 5574 // 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 5575 } 5576 5577 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5578 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5579 // set authentication requirements: 5580 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5581 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5582 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5583 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5584 authreq |= 1; 5585 } 5586 bool bonding = hci_stack->bondable; 5587 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5588 // if we have received IO Cap Response, we're in responder role 5589 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5590 if (bonding && !remote_bonding){ 5591 log_info("Remote not bonding, dropping local flag"); 5592 bonding = false; 5593 } 5594 } 5595 if (bonding){ 5596 if (connection->bonding_flags & BONDING_DEDICATED){ 5597 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5598 } else { 5599 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5600 } 5601 } 5602 uint8_t have_oob_data = 0; 5603 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5604 if (connection->classic_oob_c_192 != NULL){ 5605 have_oob_data |= 1; 5606 } 5607 if (connection->classic_oob_c_256 != NULL){ 5608 have_oob_data |= 2; 5609 } 5610 #endif 5611 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5612 return true; 5613 } 5614 5615 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5616 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5617 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5618 return true; 5619 } 5620 5621 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5622 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5623 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5624 const uint8_t zero[16] = { 0 }; 5625 const uint8_t * r_192 = zero; 5626 const uint8_t * c_192 = zero; 5627 const uint8_t * r_256 = zero; 5628 const uint8_t * c_256 = zero; 5629 // verify P-256 OOB 5630 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5631 c_256 = connection->classic_oob_c_256; 5632 if (connection->classic_oob_r_256 != NULL) { 5633 r_256 = connection->classic_oob_r_256; 5634 } 5635 } 5636 // verify P-192 OOB 5637 if ((connection->classic_oob_c_192 != NULL)) { 5638 c_192 = connection->classic_oob_c_192; 5639 if (connection->classic_oob_r_192 != NULL) { 5640 r_192 = connection->classic_oob_r_192; 5641 } 5642 } 5643 5644 // assess security 5645 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5646 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5647 if (need_level_4 && !can_reach_level_4){ 5648 log_info("Level 4 required, but not possible -> abort"); 5649 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5650 // send oob negative reply 5651 c_256 = NULL; 5652 c_192 = NULL; 5653 } 5654 5655 // Reply 5656 if (c_256 != zero) { 5657 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5658 } else if (c_192 != zero){ 5659 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5660 } else { 5661 hci_stack->classic_oob_con_handle = connection->con_handle; 5662 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5663 } 5664 return true; 5665 } 5666 #endif 5667 5668 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5669 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5670 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5671 return true; 5672 } 5673 5674 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5675 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5676 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5677 return true; 5678 } 5679 5680 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5681 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5682 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5683 return true; 5684 } 5685 5686 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5687 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5688 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5689 connection->state = SENT_DISCONNECT; 5690 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5691 return true; 5692 } 5693 5694 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5695 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5696 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5697 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5698 return true; 5699 } 5700 5701 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5702 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5703 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5704 return true; 5705 } 5706 5707 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5708 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5709 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5710 return true; 5711 } 5712 5713 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5714 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5715 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5716 return true; 5717 } 5718 5719 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5720 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5721 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5722 return true; 5723 } 5724 5725 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5726 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5727 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5728 return true; 5729 } 5730 #endif 5731 5732 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5733 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5734 #ifdef ENABLE_CLASSIC 5735 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5736 #endif 5737 if (connection->state != SENT_DISCONNECT){ 5738 connection->state = SENT_DISCONNECT; 5739 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5740 return true; 5741 } 5742 } 5743 5744 #ifdef ENABLE_CLASSIC 5745 uint16_t sniff_min_interval; 5746 switch (connection->sniff_min_interval){ 5747 case 0: 5748 break; 5749 case 0xffff: 5750 connection->sniff_min_interval = 0; 5751 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5752 return true; 5753 default: 5754 sniff_min_interval = connection->sniff_min_interval; 5755 connection->sniff_min_interval = 0; 5756 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5757 return true; 5758 } 5759 5760 if (connection->sniff_subrating_max_latency != 0xffff){ 5761 uint16_t max_latency = connection->sniff_subrating_max_latency; 5762 connection->sniff_subrating_max_latency = 0; 5763 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5764 return true; 5765 } 5766 5767 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5768 uint8_t service_type = (uint8_t) connection->qos_service_type; 5769 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5770 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); 5771 return true; 5772 } 5773 5774 if (connection->request_role != HCI_ROLE_INVALID){ 5775 hci_role_t role = connection->request_role; 5776 connection->request_role = HCI_ROLE_INVALID; 5777 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5778 return true; 5779 } 5780 #endif 5781 5782 if (connection->gap_connection_tasks != 0){ 5783 #ifdef ENABLE_CLASSIC 5784 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 5785 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 5786 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 5787 return true; 5788 } 5789 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 5790 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 5791 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5792 return true; 5793 } 5794 #endif 5795 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 5796 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 5797 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5798 return true; 5799 } 5800 } 5801 5802 #ifdef ENABLE_BLE 5803 switch (connection->le_con_parameter_update_state){ 5804 // response to L2CAP CON PARAMETER UPDATE REQUEST 5805 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5806 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5807 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5808 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5809 0x0000, 0xffff); 5810 return true; 5811 case CON_PARAMETER_UPDATE_REPLY: 5812 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5813 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5814 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5815 0x0000, 0xffff); 5816 return true; 5817 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5818 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5819 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5820 return true; 5821 default: 5822 break; 5823 } 5824 if (connection->le_phy_update_all_phys != 0xffu){ 5825 uint8_t all_phys = connection->le_phy_update_all_phys; 5826 connection->le_phy_update_all_phys = 0xff; 5827 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); 5828 return true; 5829 } 5830 #endif 5831 } 5832 return false; 5833 } 5834 5835 static void hci_run(void){ 5836 5837 // stack state sub statemachines 5838 // halting needs to be called even if we cannot send command packet now 5839 switch (hci_stack->state) { 5840 case HCI_STATE_INITIALIZING: 5841 hci_initializing_run(); 5842 break; 5843 case HCI_STATE_HALTING: 5844 hci_halting_run(); 5845 break; 5846 case HCI_STATE_FALLING_ASLEEP: 5847 hci_falling_asleep_run(); 5848 break; 5849 default: 5850 break; 5851 } 5852 5853 bool done; 5854 5855 // send continuation fragments first, as they block the prepared packet buffer 5856 done = hci_run_acl_fragments(); 5857 if (done) return; 5858 5859 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5860 // send host num completed packets next as they don't require num_cmd_packets > 0 5861 if (!hci_can_send_comand_packet_transport()) return; 5862 if (hci_stack->host_completed_packets){ 5863 hci_host_num_completed_packets(); 5864 return; 5865 } 5866 #endif 5867 5868 if (!hci_can_send_command_packet_now()) return; 5869 5870 // global/non-connection oriented commands 5871 5872 5873 #ifdef ENABLE_CLASSIC 5874 // general gap classic 5875 done = hci_run_general_gap_classic(); 5876 if (done) return; 5877 #endif 5878 5879 #ifdef ENABLE_BLE 5880 // general gap le 5881 done = hci_run_general_gap_le(); 5882 if (done) return; 5883 #endif 5884 5885 // send pending HCI commands 5886 hci_run_general_pending_commands(); 5887 } 5888 5889 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5890 // house-keeping 5891 5892 #ifdef ENABLE_CLASSIC 5893 bd_addr_t addr; 5894 hci_connection_t * conn; 5895 #endif 5896 #ifdef ENABLE_LE_CENTRAL 5897 uint8_t initiator_filter_policy; 5898 #endif 5899 5900 uint16_t opcode = little_endian_read_16(packet, 0); 5901 switch (opcode) { 5902 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5903 hci_stack->loopback_mode = packet[3]; 5904 break; 5905 5906 #ifdef ENABLE_CLASSIC 5907 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5908 reverse_bd_addr(&packet[3], addr); 5909 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5910 5911 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5912 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5913 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5914 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5915 } 5916 5917 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5918 if (!conn) { 5919 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5920 if (!conn) { 5921 // notify client that alloc failed 5922 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5923 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5924 } 5925 conn->state = SEND_CREATE_CONNECTION; 5926 conn->role = HCI_ROLE_MASTER; 5927 } 5928 5929 conn->con_handle = HCI_CON_HANDLE_INVALID; 5930 conn->role = HCI_ROLE_INVALID; 5931 5932 log_info("conn state %u", conn->state); 5933 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5934 switch (conn->state) { 5935 // if connection active exists 5936 case OPEN: 5937 // and OPEN, emit connection complete command 5938 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5939 // packet not sent to controller 5940 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5941 case RECEIVED_DISCONNECTION_COMPLETE: 5942 // create connection triggered in disconnect complete event, let's do it now 5943 break; 5944 case SEND_CREATE_CONNECTION: 5945 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5946 if (hci_classic_operation_active()){ 5947 return ERROR_CODE_SUCCESS; 5948 } 5949 #endif 5950 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5951 break; 5952 default: 5953 // otherwise, just ignore as it is already in the open process 5954 // packet not sent to controller 5955 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5956 } 5957 conn->state = SENT_CREATE_CONNECTION; 5958 5959 // track outgoing connection 5960 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5961 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5962 break; 5963 5964 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5965 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5966 // setup_synchronous_connection? Voice setting at offset 22 5967 // TODO: compare to current setting if sco connection already active 5968 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5969 break; 5970 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5971 // accept_synchronous_connection? Voice setting at offset 18 5972 // TODO: compare to current setting if sco connection already active 5973 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5974 // track outgoing connection 5975 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5976 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5977 break; 5978 #endif 5979 #endif 5980 5981 #ifdef ENABLE_BLE 5982 #ifdef ENABLE_LE_CENTRAL 5983 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5984 // white list used? 5985 initiator_filter_policy = packet[7]; 5986 switch (initiator_filter_policy) { 5987 case 0: 5988 // whitelist not used 5989 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5990 break; 5991 case 1: 5992 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5993 break; 5994 default: 5995 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5996 break; 5997 } 5998 // track outgoing connection 5999 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6000 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6001 break; 6002 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6003 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6004 break; 6005 #endif 6006 #endif 6007 default: 6008 break; 6009 } 6010 6011 hci_stack->num_cmd_packets--; 6012 6013 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6014 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6015 if (err != 0){ 6016 return ERROR_CODE_HARDWARE_FAILURE; 6017 } 6018 return ERROR_CODE_SUCCESS; 6019 } 6020 6021 // disconnect because of security block 6022 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6023 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6024 if (!connection) return; 6025 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6026 } 6027 6028 6029 // Configure Secure Simple Pairing 6030 6031 #ifdef ENABLE_CLASSIC 6032 6033 // enable will enable SSP during init 6034 void gap_ssp_set_enable(int enable){ 6035 hci_stack->ssp_enable = enable; 6036 } 6037 6038 static int hci_local_ssp_activated(void){ 6039 return gap_ssp_supported() && hci_stack->ssp_enable; 6040 } 6041 6042 // if set, BTstack will respond to io capability request using authentication requirement 6043 void gap_ssp_set_io_capability(int io_capability){ 6044 hci_stack->ssp_io_capability = io_capability; 6045 } 6046 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6047 hci_stack->ssp_authentication_requirement = authentication_requirement; 6048 } 6049 6050 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6051 void gap_ssp_set_auto_accept(int auto_accept){ 6052 hci_stack->ssp_auto_accept = auto_accept; 6053 } 6054 6055 void gap_secure_connections_enable(bool enable){ 6056 hci_stack->secure_connections_enable = enable; 6057 } 6058 bool gap_secure_connections_active(void){ 6059 return hci_stack->secure_connections_active; 6060 } 6061 6062 #endif 6063 6064 // va_list part of hci_send_cmd 6065 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6066 if (!hci_can_send_command_packet_now()){ 6067 log_error("hci_send_cmd called but cannot send packet now"); 6068 return ERROR_CODE_COMMAND_DISALLOWED; 6069 } 6070 6071 // for HCI INITIALIZATION 6072 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6073 hci_stack->last_cmd_opcode = cmd->opcode; 6074 6075 hci_reserve_packet_buffer(); 6076 uint8_t * packet = hci_stack->hci_packet_buffer; 6077 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6078 uint8_t status = hci_send_cmd_packet(packet, size); 6079 6080 // release packet buffer on error or for synchronous transport implementations 6081 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6082 hci_release_packet_buffer(); 6083 hci_emit_transport_packet_sent(); 6084 } 6085 6086 return status; 6087 } 6088 6089 /** 6090 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6091 */ 6092 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6093 va_list argptr; 6094 va_start(argptr, cmd); 6095 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6096 va_end(argptr); 6097 return status; 6098 } 6099 6100 // Create various non-HCI events. 6101 // TODO: generalize, use table similar to hci_create_command 6102 6103 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6104 // dump packet 6105 if (dump) { 6106 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 6107 } 6108 6109 // dispatch to all event handlers 6110 btstack_linked_list_iterator_t it; 6111 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6112 while (btstack_linked_list_iterator_has_next(&it)){ 6113 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6114 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6115 } 6116 } 6117 6118 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6119 if (!hci_stack->acl_packet_handler) return; 6120 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6121 } 6122 6123 #ifdef ENABLE_CLASSIC 6124 static void hci_notify_if_sco_can_send_now(void){ 6125 // notify SCO sender if waiting 6126 if (!hci_stack->sco_waiting_for_can_send_now) return; 6127 if (hci_can_send_sco_packet_now()){ 6128 hci_stack->sco_waiting_for_can_send_now = 0; 6129 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6130 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6131 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6132 } 6133 } 6134 6135 // parsing end emitting has been merged to reduce code size 6136 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6137 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6138 6139 uint8_t * eir_data; 6140 ad_context_t context; 6141 const uint8_t * name; 6142 uint8_t name_len; 6143 6144 if (size < 3) return; 6145 6146 int event_type = hci_event_packet_get_type(packet); 6147 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6148 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6149 6150 switch (event_type){ 6151 case HCI_EVENT_INQUIRY_RESULT: 6152 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6153 if (size != (3 + (num_responses * 14))) return; 6154 break; 6155 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6156 if (size != 257) return; 6157 if (num_responses != 1) return; 6158 break; 6159 default: 6160 return; 6161 } 6162 6163 // event[1] is set at the end 6164 int i; 6165 for (i=0; i<num_responses;i++){ 6166 memset(event, 0, sizeof(event)); 6167 event[0] = GAP_EVENT_INQUIRY_RESULT; 6168 uint8_t event_size = 27; // if name is not set by EIR 6169 6170 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6171 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6172 (void)memcpy(&event[9], 6173 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6174 3); // class of device 6175 (void)memcpy(&event[12], 6176 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6177 2); // clock offset 6178 6179 switch (event_type){ 6180 case HCI_EVENT_INQUIRY_RESULT: 6181 // 14,15,16,17 = 0, size 18 6182 break; 6183 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6184 event[14] = 1; 6185 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6186 // 16,17 = 0, size 18 6187 break; 6188 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6189 event[14] = 1; 6190 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6191 // EIR packets only contain a single inquiry response 6192 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6193 name = NULL; 6194 // Iterate over EIR data 6195 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6196 uint8_t data_type = ad_iterator_get_data_type(&context); 6197 uint8_t data_size = ad_iterator_get_data_len(&context); 6198 const uint8_t * data = ad_iterator_get_data(&context); 6199 // Prefer Complete Local Name over Shortened Local Name 6200 switch (data_type){ 6201 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6202 if (name) continue; 6203 /* fall through */ 6204 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6205 name = data; 6206 name_len = data_size; 6207 break; 6208 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6209 if (data_size != 8) break; 6210 event[16] = 1; 6211 memcpy(&event[17], data, 8); 6212 break; 6213 default: 6214 break; 6215 } 6216 } 6217 if (name){ 6218 event[25] = 1; 6219 // truncate name if needed 6220 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6221 event[26] = len; 6222 (void)memcpy(&event[27], name, len); 6223 event_size += len; 6224 } 6225 break; 6226 default: 6227 return; 6228 } 6229 event[1] = event_size - 2; 6230 hci_emit_event(event, event_size, 1); 6231 } 6232 } 6233 #endif 6234 6235 void hci_emit_state(void){ 6236 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6237 uint8_t event[3]; 6238 event[0] = BTSTACK_EVENT_STATE; 6239 event[1] = sizeof(event) - 2u; 6240 event[2] = hci_stack->state; 6241 hci_emit_event(event, sizeof(event), 1); 6242 } 6243 6244 #ifdef ENABLE_CLASSIC 6245 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6246 uint8_t event[13]; 6247 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6248 event[1] = sizeof(event) - 2; 6249 event[2] = status; 6250 little_endian_store_16(event, 3, con_handle); 6251 reverse_bd_addr(address, &event[5]); 6252 event[11] = 1; // ACL connection 6253 event[12] = 0; // encryption disabled 6254 hci_emit_event(event, sizeof(event), 1); 6255 } 6256 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6257 if (disable_l2cap_timeouts) return; 6258 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6259 uint8_t event[4]; 6260 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6261 event[1] = sizeof(event) - 2; 6262 little_endian_store_16(event, 2, conn->con_handle); 6263 hci_emit_event(event, sizeof(event), 1); 6264 } 6265 #endif 6266 6267 #ifdef ENABLE_BLE 6268 #ifdef ENABLE_LE_CENTRAL 6269 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){ 6270 uint8_t event[21]; 6271 event[0] = HCI_EVENT_LE_META; 6272 event[1] = sizeof(event) - 2u; 6273 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6274 event[3] = status; 6275 little_endian_store_16(event, 4, con_handle); 6276 event[6] = 0; // TODO: role 6277 event[7] = address_type; 6278 reverse_bd_addr(address, &event[8]); 6279 little_endian_store_16(event, 14, 0); // interval 6280 little_endian_store_16(event, 16, 0); // latency 6281 little_endian_store_16(event, 18, 0); // supervision timeout 6282 event[20] = 0; // master clock accuracy 6283 hci_emit_event(event, sizeof(event), 1); 6284 } 6285 #endif 6286 #endif 6287 6288 static void hci_emit_transport_packet_sent(void){ 6289 // notify upper stack that it might be possible to send again 6290 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6291 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6292 } 6293 6294 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6295 uint8_t event[6]; 6296 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6297 event[1] = sizeof(event) - 2u; 6298 event[2] = 0; // status = OK 6299 little_endian_store_16(event, 3, con_handle); 6300 event[5] = reason; 6301 hci_emit_event(event, sizeof(event), 1); 6302 } 6303 6304 static void hci_emit_nr_connections_changed(void){ 6305 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6306 uint8_t event[3]; 6307 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6308 event[1] = sizeof(event) - 2u; 6309 event[2] = nr_hci_connections(); 6310 hci_emit_event(event, sizeof(event), 1); 6311 } 6312 6313 static void hci_emit_hci_open_failed(void){ 6314 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6315 uint8_t event[2]; 6316 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6317 event[1] = sizeof(event) - 2u; 6318 hci_emit_event(event, sizeof(event), 1); 6319 } 6320 6321 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6322 log_info("hci_emit_dedicated_bonding_result %u ", status); 6323 uint8_t event[9]; 6324 int pos = 0; 6325 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6326 event[pos++] = sizeof(event) - 2u; 6327 event[pos++] = status; 6328 reverse_bd_addr(address, &event[pos]); 6329 hci_emit_event(event, sizeof(event), 1); 6330 } 6331 6332 6333 #ifdef ENABLE_CLASSIC 6334 6335 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6336 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6337 uint8_t event[5]; 6338 int pos = 0; 6339 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6340 event[pos++] = sizeof(event) - 2; 6341 little_endian_store_16(event, 2, con_handle); 6342 pos += 2; 6343 event[pos++] = level; 6344 hci_emit_event(event, sizeof(event), 1); 6345 } 6346 6347 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6348 if (!connection) return LEVEL_0; 6349 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6350 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6351 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6352 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6353 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6354 // LEVEL 4 always requires 128 bit encrytion key size 6355 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6356 security_level = LEVEL_3; 6357 } 6358 return security_level; 6359 } 6360 6361 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6362 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6363 uint8_t event[3]; 6364 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6365 event[1] = sizeof(event) - 2; 6366 event[2] = enabled; 6367 hci_emit_event(event, sizeof(event), 1); 6368 } 6369 6370 // query if remote side supports eSCO 6371 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6372 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6373 if (!connection) return false; 6374 return (connection->remote_supported_features[0] & 1) != 0; 6375 } 6376 6377 static bool hci_ssp_supported(hci_connection_t * connection){ 6378 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6379 return (connection->bonding_flags & mask) == mask; 6380 } 6381 6382 // query if remote side supports SSP 6383 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6384 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6385 if (!connection) return false; 6386 return hci_ssp_supported(connection) ? 1 : 0; 6387 } 6388 6389 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6390 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6391 } 6392 6393 /** 6394 * Check if remote supported features query has completed 6395 */ 6396 bool hci_remote_features_available(hci_con_handle_t handle){ 6397 hci_connection_t * connection = hci_connection_for_handle(handle); 6398 if (!connection) return false; 6399 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6400 } 6401 6402 /** 6403 * Trigger remote supported features query 6404 */ 6405 6406 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6407 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6408 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6409 } 6410 } 6411 6412 void hci_remote_features_query(hci_con_handle_t con_handle){ 6413 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6414 if (!connection) return; 6415 hci_trigger_remote_features_for_connection(connection); 6416 hci_run(); 6417 } 6418 6419 // GAP API 6420 /** 6421 * @bbrief enable/disable bonding. default is enabled 6422 * @praram enabled 6423 */ 6424 void gap_set_bondable_mode(int enable){ 6425 hci_stack->bondable = enable ? 1 : 0; 6426 } 6427 /** 6428 * @brief Get bondable mode. 6429 * @return 1 if bondable 6430 */ 6431 int gap_get_bondable_mode(void){ 6432 return hci_stack->bondable; 6433 } 6434 6435 /** 6436 * @brief map link keys to security levels 6437 */ 6438 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6439 switch (link_key_type){ 6440 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6441 return LEVEL_4; 6442 case COMBINATION_KEY: 6443 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6444 return LEVEL_3; 6445 default: 6446 return LEVEL_2; 6447 } 6448 } 6449 6450 /** 6451 * @brief map link keys to secure connection yes/no 6452 */ 6453 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6454 switch (link_key_type){ 6455 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6456 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6457 return true; 6458 default: 6459 return false; 6460 } 6461 } 6462 6463 /** 6464 * @brief map link keys to authenticated 6465 */ 6466 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6467 switch (link_key_type){ 6468 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6469 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6470 return true; 6471 default: 6472 return false; 6473 } 6474 } 6475 6476 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6477 log_info("gap_mitm_protection_required_for_security_level %u", level); 6478 return level > LEVEL_2; 6479 } 6480 6481 /** 6482 * @brief get current security level 6483 */ 6484 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6485 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6486 if (!connection) return LEVEL_0; 6487 return gap_security_level_for_connection(connection); 6488 } 6489 6490 /** 6491 * @brief request connection to device to 6492 * @result GAP_AUTHENTICATION_RESULT 6493 */ 6494 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6495 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6496 if (!connection){ 6497 hci_emit_security_level(con_handle, LEVEL_0); 6498 return; 6499 } 6500 6501 btstack_assert(hci_is_le_connection(connection) == false); 6502 6503 // 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) 6504 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6505 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6506 requested_level = LEVEL_4; 6507 } 6508 6509 gap_security_level_t current_level = gap_security_level(con_handle); 6510 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6511 requested_level, connection->requested_security_level, current_level); 6512 6513 // authentication active if authentication request was sent or planned level > 0 6514 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6515 if (authentication_active){ 6516 // authentication already active 6517 if (connection->requested_security_level < requested_level){ 6518 // increase requested level as new level is higher 6519 // TODO: handle re-authentication when done 6520 connection->requested_security_level = requested_level; 6521 } 6522 } else { 6523 // no request active, notify if security sufficient 6524 if (requested_level <= current_level){ 6525 hci_emit_security_level(con_handle, current_level); 6526 return; 6527 } 6528 6529 // store request 6530 connection->requested_security_level = requested_level; 6531 6532 // request remote features if not already active 6533 hci_remote_features_query(con_handle); 6534 6535 // start to authenticate connection 6536 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6537 hci_run(); 6538 } 6539 } 6540 6541 /** 6542 * @brief start dedicated bonding with device. disconnect after bonding 6543 * @param device 6544 * @param request MITM protection 6545 * @result GAP_DEDICATED_BONDING_COMPLETE 6546 */ 6547 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6548 6549 // create connection state machine 6550 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6551 6552 if (!connection){ 6553 return BTSTACK_MEMORY_ALLOC_FAILED; 6554 } 6555 6556 // delete linkn key 6557 gap_drop_link_key_for_bd_addr(device); 6558 6559 // configure LEVEL_2/3, dedicated bonding 6560 connection->state = SEND_CREATE_CONNECTION; 6561 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6562 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6563 connection->bonding_flags = BONDING_DEDICATED; 6564 6565 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6566 6567 // handle: connnection failure (connection complete != ok) 6568 // handle: authentication failure 6569 // handle: disconnect on done 6570 6571 hci_run(); 6572 6573 return 0; 6574 } 6575 6576 void gap_set_local_name(const char * local_name){ 6577 hci_stack->local_name = local_name; 6578 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6579 // also update EIR if not set by user 6580 if (hci_stack->eir_data == NULL){ 6581 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6582 } 6583 hci_run(); 6584 } 6585 #endif 6586 6587 6588 #ifdef ENABLE_BLE 6589 6590 #ifdef ENABLE_LE_CENTRAL 6591 void gap_start_scan(void){ 6592 hci_stack->le_scanning_enabled = true; 6593 hci_run(); 6594 } 6595 6596 void gap_stop_scan(void){ 6597 hci_stack->le_scanning_enabled = false; 6598 hci_run(); 6599 } 6600 6601 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6602 hci_stack->le_scan_type = scan_type; 6603 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6604 hci_stack->le_scan_interval = scan_interval; 6605 hci_stack->le_scan_window = scan_window; 6606 hci_stack->le_scanning_param_update = true; 6607 hci_run(); 6608 } 6609 6610 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6611 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6612 } 6613 6614 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6615 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6616 if (!conn){ 6617 // disallow if le connection is already outgoing 6618 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6619 log_error("le connection already active"); 6620 return ERROR_CODE_COMMAND_DISALLOWED; 6621 } 6622 6623 log_info("gap_connect: no connection exists yet, creating context"); 6624 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6625 if (!conn){ 6626 // notify client that alloc failed 6627 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6628 log_info("gap_connect: failed to alloc hci_connection_t"); 6629 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6630 } 6631 6632 // set le connecting state 6633 if (hci_is_le_connection_type(addr_type)){ 6634 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6635 } 6636 6637 conn->state = SEND_CREATE_CONNECTION; 6638 log_info("gap_connect: send create connection next"); 6639 hci_run(); 6640 return ERROR_CODE_SUCCESS; 6641 } 6642 6643 if (!hci_is_le_connection(conn) || 6644 (conn->state == SEND_CREATE_CONNECTION) || 6645 (conn->state == SENT_CREATE_CONNECTION)) { 6646 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6647 log_error("gap_connect: classic connection or connect is already being created"); 6648 return GATT_CLIENT_IN_WRONG_STATE; 6649 } 6650 6651 // check if connection was just disconnected 6652 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6653 log_info("gap_connect: send create connection (again)"); 6654 conn->state = SEND_CREATE_CONNECTION; 6655 hci_run(); 6656 return ERROR_CODE_SUCCESS; 6657 } 6658 6659 log_info("gap_connect: context exists with state %u", conn->state); 6660 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6661 hci_run(); 6662 return ERROR_CODE_SUCCESS; 6663 } 6664 6665 // @assumption: only a single outgoing LE Connection exists 6666 static hci_connection_t * gap_get_outgoing_connection(void){ 6667 btstack_linked_item_t *it; 6668 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6669 hci_connection_t * conn = (hci_connection_t *) it; 6670 if (!hci_is_le_connection(conn)) continue; 6671 switch (conn->state){ 6672 case SEND_CREATE_CONNECTION: 6673 case SENT_CREATE_CONNECTION: 6674 case SENT_CANCEL_CONNECTION: 6675 return conn; 6676 default: 6677 break; 6678 }; 6679 } 6680 return NULL; 6681 } 6682 6683 uint8_t gap_connect_cancel(void){ 6684 hci_connection_t * conn = gap_get_outgoing_connection(); 6685 if (!conn) return 0; 6686 switch (conn->state){ 6687 case SEND_CREATE_CONNECTION: 6688 // skip sending create connection and emit event instead 6689 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6690 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6691 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6692 btstack_memory_hci_connection_free( conn ); 6693 break; 6694 case SENT_CREATE_CONNECTION: 6695 // request to send cancel connection 6696 conn->state = SEND_CANCEL_CONNECTION; 6697 hci_run(); 6698 break; 6699 default: 6700 break; 6701 } 6702 return 0; 6703 } 6704 6705 /** 6706 * @brief Set connection parameters for outgoing connections 6707 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6708 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6709 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6710 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6711 * @param conn_latency, default: 4 6712 * @param supervision_timeout (unit: 10ms), default: 720 ms 6713 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6714 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6715 */ 6716 6717 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6718 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6719 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6720 hci_stack->le_connection_scan_interval = conn_scan_interval; 6721 hci_stack->le_connection_scan_window = conn_scan_window; 6722 hci_stack->le_connection_interval_min = conn_interval_min; 6723 hci_stack->le_connection_interval_max = conn_interval_max; 6724 hci_stack->le_connection_latency = conn_latency; 6725 hci_stack->le_supervision_timeout = supervision_timeout; 6726 hci_stack->le_minimum_ce_length = min_ce_length; 6727 hci_stack->le_maximum_ce_length = max_ce_length; 6728 } 6729 #endif 6730 6731 /** 6732 * @brief Updates the connection parameters for a given LE connection 6733 * @param handle 6734 * @param conn_interval_min (unit: 1.25ms) 6735 * @param conn_interval_max (unit: 1.25ms) 6736 * @param conn_latency 6737 * @param supervision_timeout (unit: 10ms) 6738 * @return 0 if ok 6739 */ 6740 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6741 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6742 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6743 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6744 connection->le_conn_interval_min = conn_interval_min; 6745 connection->le_conn_interval_max = conn_interval_max; 6746 connection->le_conn_latency = conn_latency; 6747 connection->le_supervision_timeout = supervision_timeout; 6748 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6749 hci_run(); 6750 return 0; 6751 } 6752 6753 /** 6754 * @brief Request an update of the connection parameter for a given LE connection 6755 * @param handle 6756 * @param conn_interval_min (unit: 1.25ms) 6757 * @param conn_interval_max (unit: 1.25ms) 6758 * @param conn_latency 6759 * @param supervision_timeout (unit: 10ms) 6760 * @return 0 if ok 6761 */ 6762 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6763 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6764 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6765 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6766 connection->le_conn_interval_min = conn_interval_min; 6767 connection->le_conn_interval_max = conn_interval_max; 6768 connection->le_conn_latency = conn_latency; 6769 connection->le_supervision_timeout = supervision_timeout; 6770 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6771 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6772 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6773 return 0; 6774 } 6775 6776 #ifdef ENABLE_LE_PERIPHERAL 6777 6778 /** 6779 * @brief Set Advertisement Data 6780 * @param advertising_data_length 6781 * @param advertising_data (max 31 octets) 6782 * @note data is not copied, pointer has to stay valid 6783 */ 6784 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6785 hci_stack->le_advertisements_data_len = advertising_data_length; 6786 hci_stack->le_advertisements_data = advertising_data; 6787 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6788 hci_run(); 6789 } 6790 6791 /** 6792 * @brief Set Scan Response Data 6793 * @param advertising_data_length 6794 * @param advertising_data (max 31 octets) 6795 * @note data is not copied, pointer has to stay valid 6796 */ 6797 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6798 hci_stack->le_scan_response_data_len = scan_response_data_length; 6799 hci_stack->le_scan_response_data = scan_response_data; 6800 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6801 hci_run(); 6802 } 6803 6804 /** 6805 * @brief Set Advertisement Parameters 6806 * @param adv_int_min 6807 * @param adv_int_max 6808 * @param adv_type 6809 * @param direct_address_type 6810 * @param direct_address 6811 * @param channel_map 6812 * @param filter_policy 6813 * 6814 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6815 */ 6816 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6817 uint8_t direct_address_typ, bd_addr_t direct_address, 6818 uint8_t channel_map, uint8_t filter_policy) { 6819 6820 hci_stack->le_advertisements_interval_min = adv_int_min; 6821 hci_stack->le_advertisements_interval_max = adv_int_max; 6822 hci_stack->le_advertisements_type = adv_type; 6823 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6824 hci_stack->le_advertisements_channel_map = channel_map; 6825 hci_stack->le_advertisements_filter_policy = filter_policy; 6826 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6827 6); 6828 6829 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6830 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6831 hci_run(); 6832 } 6833 6834 /** 6835 * @brief Enable/Disable Advertisements 6836 * @param enabled 6837 */ 6838 void gap_advertisements_enable(int enabled){ 6839 if (enabled == 0){ 6840 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6841 } else { 6842 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6843 } 6844 hci_update_advertisements_enabled_for_current_roles(); 6845 hci_run(); 6846 } 6847 6848 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6849 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6850 btstack_linked_list_iterator_t it; 6851 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6852 while (btstack_linked_list_iterator_has_next(&it)){ 6853 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6854 if ( item->advertising_handle == advertising_handle ) { 6855 return item; 6856 } 6857 } 6858 return NULL; 6859 } 6860 6861 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6862 // find free advertisement handle 6863 uint8_t advertisement_handle; 6864 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6865 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6866 } 6867 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6868 // clear 6869 memset(storage, 0, sizeof(le_advertising_set_t)); 6870 // copy params 6871 storage->advertising_handle = advertisement_handle; 6872 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6873 // add to list 6874 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6875 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6876 *out_advertising_handle = advertisement_handle; 6877 // set tasks and start 6878 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6879 hci_run(); 6880 return ERROR_CODE_SUCCESS; 6881 } 6882 6883 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6884 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6885 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6886 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6887 // set tasks and start 6888 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6889 hci_run(); 6890 return ERROR_CODE_SUCCESS; 6891 } 6892 6893 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6894 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6895 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6896 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6897 return ERROR_CODE_SUCCESS; 6898 } 6899 6900 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 6901 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6902 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6903 // periodic advertising requires neither connectable, scannable, legacy or anonymous 6904 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6905 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 6906 // set tasks and start 6907 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6908 hci_run(); 6909 return ERROR_CODE_SUCCESS; 6910 } 6911 6912 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 6913 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6914 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6915 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 6916 return ERROR_CODE_SUCCESS; 6917 } 6918 6919 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6920 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6921 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6922 memcpy(advertising_set->random_address, random_address, 6); 6923 // set tasks and start 6924 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6925 hci_run(); 6926 return ERROR_CODE_SUCCESS; 6927 } 6928 6929 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 6930 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6931 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6932 advertising_set->adv_data = advertising_data; 6933 advertising_set->adv_data_len = advertising_data_length; 6934 // set tasks and start 6935 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6936 hci_run(); 6937 return ERROR_CODE_SUCCESS; 6938 } 6939 6940 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){ 6941 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6942 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6943 advertising_set->scan_data = scan_response_data; 6944 advertising_set->scan_data_len = scan_response_data_length; 6945 // set tasks and start 6946 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6947 hci_run(); 6948 return ERROR_CODE_SUCCESS; 6949 } 6950 6951 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 6952 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6953 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6954 advertising_set->periodic_data = periodic_data; 6955 advertising_set->periodic_data_len = periodic_data_length; 6956 // set tasks and start 6957 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6958 hci_run(); 6959 return ERROR_CODE_SUCCESS; 6960 } 6961 6962 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6963 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6964 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6965 advertising_set->enable_timeout = timeout; 6966 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6967 // set tasks and start 6968 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6969 hci_run(); 6970 return ERROR_CODE_SUCCESS; 6971 } 6972 6973 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6974 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6975 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6976 // set tasks and start 6977 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6978 hci_run(); 6979 return ERROR_CODE_SUCCESS; 6980 } 6981 6982 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 6983 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6984 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6985 // set tasks and start 6986 advertising_set->periodic_include_adi = include_adi; 6987 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6988 hci_run(); 6989 return ERROR_CODE_SUCCESS; 6990 } 6991 6992 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 6993 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6994 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6995 // set tasks and start 6996 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6997 hci_run(); 6998 return ERROR_CODE_SUCCESS; 6999 } 7000 7001 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7002 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7003 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7004 // set tasks and start 7005 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7006 hci_run(); 7007 return ERROR_CODE_SUCCESS; 7008 } 7009 #endif 7010 7011 #endif 7012 7013 void hci_le_set_own_address_type(uint8_t own_address_type){ 7014 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7015 if (own_address_type == hci_stack->le_own_addr_type) return; 7016 hci_stack->le_own_addr_type = own_address_type; 7017 7018 #ifdef ENABLE_LE_PERIPHERAL 7019 // update advertisement parameters, too 7020 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7021 hci_run(); 7022 #endif 7023 #ifdef ENABLE_LE_CENTRAL 7024 // note: we don't update scan parameters or modify ongoing connection attempts 7025 #endif 7026 } 7027 7028 void hci_le_random_address_set(const bd_addr_t random_address){ 7029 memcpy(hci_stack->le_random_address, random_address, 6); 7030 hci_stack->le_random_address_set = true; 7031 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7032 hci_run(); 7033 } 7034 7035 #endif 7036 7037 uint8_t gap_disconnect(hci_con_handle_t handle){ 7038 hci_connection_t * conn = hci_connection_for_handle(handle); 7039 if (!conn){ 7040 hci_emit_disconnection_complete(handle, 0); 7041 return 0; 7042 } 7043 // ignore if already disconnected 7044 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7045 return 0; 7046 } 7047 conn->state = SEND_DISCONNECT; 7048 hci_run(); 7049 return 0; 7050 } 7051 7052 int gap_read_rssi(hci_con_handle_t con_handle){ 7053 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7054 if (hci_connection == NULL) return 0; 7055 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7056 hci_run(); 7057 return 1; 7058 } 7059 7060 /** 7061 * @brief Get connection type 7062 * @param con_handle 7063 * @result connection_type 7064 */ 7065 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7066 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7067 if (!conn) return GAP_CONNECTION_INVALID; 7068 switch (conn->address_type){ 7069 case BD_ADDR_TYPE_LE_PUBLIC: 7070 case BD_ADDR_TYPE_LE_RANDOM: 7071 return GAP_CONNECTION_LE; 7072 case BD_ADDR_TYPE_SCO: 7073 return GAP_CONNECTION_SCO; 7074 case BD_ADDR_TYPE_ACL: 7075 return GAP_CONNECTION_ACL; 7076 default: 7077 return GAP_CONNECTION_INVALID; 7078 } 7079 } 7080 7081 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7082 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7083 if (!conn) return HCI_ROLE_INVALID; 7084 return (hci_role_t) conn->role; 7085 } 7086 7087 7088 #ifdef ENABLE_CLASSIC 7089 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7090 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7091 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7092 conn->request_role = role; 7093 hci_run(); 7094 return ERROR_CODE_SUCCESS; 7095 } 7096 #endif 7097 7098 #ifdef ENABLE_BLE 7099 7100 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){ 7101 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7102 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7103 7104 conn->le_phy_update_all_phys = all_phys; 7105 conn->le_phy_update_tx_phys = tx_phys; 7106 conn->le_phy_update_rx_phys = rx_phys; 7107 conn->le_phy_update_phy_options = phy_options; 7108 7109 hci_run(); 7110 7111 return 0; 7112 } 7113 7114 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7115 // check if already in list 7116 btstack_linked_list_iterator_t it; 7117 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7118 while (btstack_linked_list_iterator_has_next(&it)) { 7119 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7120 if (entry->address_type != address_type) { 7121 continue; 7122 } 7123 if (memcmp(entry->address, address, 6) != 0) { 7124 continue; 7125 } 7126 // disallow if already scheduled to add 7127 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7128 return ERROR_CODE_COMMAND_DISALLOWED; 7129 } 7130 // still on controller, but scheduled to remove -> re-add 7131 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7132 return ERROR_CODE_SUCCESS; 7133 } 7134 // alloc and add to list 7135 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7136 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7137 entry->address_type = address_type; 7138 (void)memcpy(entry->address, address, 6); 7139 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7140 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7141 return ERROR_CODE_SUCCESS; 7142 } 7143 7144 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7145 btstack_linked_list_iterator_t it; 7146 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7147 while (btstack_linked_list_iterator_has_next(&it)){ 7148 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7149 if (entry->address_type != address_type) { 7150 continue; 7151 } 7152 if (memcmp(entry->address, address, 6) != 0) { 7153 continue; 7154 } 7155 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7156 // remove from controller if already present 7157 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7158 } else { 7159 // directly remove entry from whitelist 7160 btstack_linked_list_iterator_remove(&it); 7161 btstack_memory_whitelist_entry_free(entry); 7162 } 7163 return ERROR_CODE_SUCCESS; 7164 } 7165 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7166 } 7167 7168 static void hci_whitelist_clear(void){ 7169 btstack_linked_list_iterator_t it; 7170 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7171 while (btstack_linked_list_iterator_has_next(&it)){ 7172 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7173 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7174 // remove from controller if already present 7175 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7176 continue; 7177 } 7178 // directly remove entry from whitelist 7179 btstack_linked_list_iterator_remove(&it); 7180 btstack_memory_whitelist_entry_free(entry); 7181 } 7182 } 7183 7184 // free all entries unconditionally 7185 static void hci_whitelist_free(void){ 7186 btstack_linked_list_iterator_t lit; 7187 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7188 while (btstack_linked_list_iterator_has_next(&lit)){ 7189 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7190 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7191 btstack_memory_whitelist_entry_free(entry); 7192 } 7193 } 7194 7195 /** 7196 * @brief Clear Whitelist 7197 * @return 0 if ok 7198 */ 7199 uint8_t gap_whitelist_clear(void){ 7200 hci_whitelist_clear(); 7201 hci_run(); 7202 return ERROR_CODE_SUCCESS; 7203 } 7204 7205 /** 7206 * @brief Add Device to Whitelist 7207 * @param address_typ 7208 * @param address 7209 * @return 0 if ok 7210 */ 7211 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7212 uint8_t status = hci_whitelist_add(address_type, address); 7213 if (status){ 7214 return status; 7215 } 7216 hci_run(); 7217 return ERROR_CODE_SUCCESS; 7218 } 7219 7220 /** 7221 * @brief Remove Device from Whitelist 7222 * @param address_typ 7223 * @param address 7224 * @return 0 if ok 7225 */ 7226 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7227 uint8_t status = hci_whitelist_remove(address_type, address); 7228 if (status){ 7229 return status; 7230 } 7231 hci_run(); 7232 return ERROR_CODE_SUCCESS; 7233 } 7234 7235 #ifdef ENABLE_LE_CENTRAL 7236 /** 7237 * @brief Connect with Whitelist 7238 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7239 * @return - if ok 7240 */ 7241 uint8_t gap_connect_with_whitelist(void){ 7242 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7243 return ERROR_CODE_COMMAND_DISALLOWED; 7244 } 7245 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7246 hci_run(); 7247 return ERROR_CODE_SUCCESS; 7248 } 7249 7250 /** 7251 * @brief Auto Connection Establishment - Start Connecting to device 7252 * @param address_typ 7253 * @param address 7254 * @return 0 if ok 7255 */ 7256 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7257 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7258 return ERROR_CODE_COMMAND_DISALLOWED; 7259 } 7260 7261 uint8_t status = hci_whitelist_add(address_type, address); 7262 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7263 return status; 7264 } 7265 7266 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7267 7268 hci_run(); 7269 return ERROR_CODE_SUCCESS; 7270 } 7271 7272 /** 7273 * @brief Auto Connection Establishment - Stop Connecting to device 7274 * @param address_typ 7275 * @param address 7276 * @return 0 if ok 7277 */ 7278 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7279 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7280 return ERROR_CODE_COMMAND_DISALLOWED; 7281 } 7282 7283 hci_whitelist_remove(address_type, address); 7284 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7285 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7286 } 7287 hci_run(); 7288 return 0; 7289 } 7290 7291 /** 7292 * @brief Auto Connection Establishment - Stop everything 7293 * @note Convenience function to stop all active auto connection attempts 7294 */ 7295 uint8_t gap_auto_connection_stop_all(void){ 7296 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7297 return ERROR_CODE_COMMAND_DISALLOWED; 7298 } 7299 hci_whitelist_clear(); 7300 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7301 hci_run(); 7302 return ERROR_CODE_SUCCESS; 7303 } 7304 7305 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7306 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7307 if (!conn) return 0; 7308 return conn->le_connection_interval; 7309 } 7310 #endif 7311 #endif 7312 7313 #ifdef ENABLE_CLASSIC 7314 /** 7315 * @brief Set Extended Inquiry Response data 7316 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7317 * @note has to be done before stack starts up 7318 */ 7319 void gap_set_extended_inquiry_response(const uint8_t * data){ 7320 hci_stack->eir_data = data; 7321 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7322 hci_run(); 7323 } 7324 7325 /** 7326 * @brief Start GAP Classic Inquiry 7327 * @param duration in 1.28s units 7328 * @return 0 if ok 7329 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7330 */ 7331 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7332 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7333 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7334 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7335 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7336 } 7337 hci_stack->inquiry_state = duration_in_1280ms_units; 7338 hci_run(); 7339 return 0; 7340 } 7341 7342 /** 7343 * @brief Stop GAP Classic Inquiry 7344 * @return 0 if ok 7345 */ 7346 int gap_inquiry_stop(void){ 7347 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7348 // emit inquiry complete event, before it even started 7349 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7350 hci_emit_event(event, sizeof(event), 1); 7351 return 0; 7352 } 7353 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7354 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7355 hci_run(); 7356 return 0; 7357 } 7358 7359 void gap_inquiry_set_lap(uint32_t lap){ 7360 hci_stack->inquiry_lap = lap; 7361 } 7362 7363 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7364 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7365 hci_stack->inquiry_scan_window = inquiry_scan_window; 7366 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7367 hci_run(); 7368 } 7369 7370 7371 /** 7372 * @brief Remote Name Request 7373 * @param addr 7374 * @param page_scan_repetition_mode 7375 * @param clock_offset only used when bit 15 is set 7376 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7377 */ 7378 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7379 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7380 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7381 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7382 hci_stack->remote_name_clock_offset = clock_offset; 7383 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7384 hci_run(); 7385 return 0; 7386 } 7387 7388 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7389 hci_stack->gap_pairing_state = state; 7390 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7391 hci_run(); 7392 return 0; 7393 } 7394 7395 /** 7396 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7397 * @param addr 7398 * @param pin_data 7399 * @param pin_len 7400 * @return 0 if ok 7401 */ 7402 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7403 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7404 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7405 hci_stack->gap_pairing_pin_len = pin_len; 7406 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7407 } 7408 7409 /** 7410 * @brief Legacy Pairing Pin Code Response 7411 * @param addr 7412 * @param pin 7413 * @return 0 if ok 7414 */ 7415 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7416 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7417 } 7418 7419 /** 7420 * @brief Abort Legacy Pairing 7421 * @param addr 7422 * @param pin 7423 * @return 0 if ok 7424 */ 7425 int gap_pin_code_negative(bd_addr_t addr){ 7426 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7427 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7428 } 7429 7430 /** 7431 * @brief SSP Passkey Response 7432 * @param addr 7433 * @param passkey 7434 * @return 0 if ok 7435 */ 7436 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7437 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7438 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7439 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7440 } 7441 7442 /** 7443 * @brief Abort SSP Passkey Entry/Pairing 7444 * @param addr 7445 * @param pin 7446 * @return 0 if ok 7447 */ 7448 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7449 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7450 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7451 } 7452 7453 /** 7454 * @brief Accept SSP Numeric Comparison 7455 * @param addr 7456 * @param passkey 7457 * @return 0 if ok 7458 */ 7459 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7460 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7461 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7462 } 7463 7464 /** 7465 * @brief Abort SSP Numeric Comparison/Pairing 7466 * @param addr 7467 * @param pin 7468 * @return 0 if ok 7469 */ 7470 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7471 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7472 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7473 } 7474 7475 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7476 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7477 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7478 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7479 connectionSetAuthenticationFlags(conn, flag); 7480 hci_run(); 7481 return ERROR_CODE_SUCCESS; 7482 } 7483 #endif 7484 7485 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7486 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7487 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7488 } 7489 7490 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7491 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7492 } 7493 #endif 7494 7495 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7496 /** 7497 * @brief Report Remote OOB Data 7498 * @param bd_addr 7499 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7500 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7501 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7502 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7503 */ 7504 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){ 7505 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7506 if (connection == NULL) { 7507 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7508 } 7509 connection->classic_oob_c_192 = c_192; 7510 connection->classic_oob_r_192 = r_192; 7511 7512 // ignore P-256 if not supported by us 7513 if (hci_stack->secure_connections_active){ 7514 connection->classic_oob_c_256 = c_256; 7515 connection->classic_oob_r_256 = r_256; 7516 } 7517 7518 return ERROR_CODE_SUCCESS; 7519 } 7520 /** 7521 * @brief Generate new OOB data 7522 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7523 */ 7524 void gap_ssp_generate_oob_data(void){ 7525 hci_stack->classic_read_local_oob_data = true; 7526 hci_run(); 7527 } 7528 7529 #endif 7530 7531 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7532 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7533 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7534 if (connection == NULL) { 7535 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7536 } 7537 7538 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7539 connection->link_key_type = type; 7540 7541 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7542 } 7543 7544 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7545 /** 7546 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7547 * @param inquiry_mode see bluetooth_defines.h 7548 */ 7549 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7550 hci_stack->inquiry_mode = inquiry_mode; 7551 } 7552 7553 /** 7554 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7555 */ 7556 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7557 hci_stack->sco_voice_setting = voice_setting; 7558 } 7559 7560 /** 7561 * @brief Get SCO Voice Setting 7562 * @return current voice setting 7563 */ 7564 uint16_t hci_get_sco_voice_setting(void){ 7565 return hci_stack->sco_voice_setting; 7566 } 7567 7568 static int hci_have_usb_transport(void){ 7569 if (!hci_stack->hci_transport) return 0; 7570 const char * transport_name = hci_stack->hci_transport->name; 7571 if (!transport_name) return 0; 7572 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7573 } 7574 7575 /** @brief Get SCO packet length for current SCO Voice setting 7576 * @note Using SCO packets of the exact length is required for USB transfer 7577 * @return Length of SCO packets in bytes (not audio frames) 7578 */ 7579 uint16_t hci_get_sco_packet_length(void){ 7580 uint16_t sco_packet_length = 0; 7581 7582 #ifdef ENABLE_SCO_OVER_HCI 7583 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7584 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7585 7586 if (hci_have_usb_transport()){ 7587 // see Core Spec for H2 USB Transfer. 7588 // 3 byte SCO header + 24 bytes per connection 7589 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7590 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7591 } else { 7592 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7593 sco_packet_length = 3 + 60 * multiplier; 7594 // assert that it still fits inside an SCO buffer 7595 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7596 sco_packet_length = 3 + 60; 7597 } 7598 } 7599 #endif 7600 7601 #ifdef HAVE_SCO_TRANSPORT 7602 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7603 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7604 sco_packet_length = 3 + 60 * multiplier; 7605 #endif 7606 return sco_packet_length; 7607 } 7608 7609 /** 7610 * @brief Sets the master/slave policy 7611 * @param policy (0: attempt to become master, 1: let connecting device decide) 7612 */ 7613 void hci_set_master_slave_policy(uint8_t policy){ 7614 hci_stack->master_slave_policy = policy; 7615 } 7616 7617 #endif 7618 7619 HCI_STATE hci_get_state(void){ 7620 return hci_stack->state; 7621 } 7622 7623 #ifdef ENABLE_CLASSIC 7624 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7625 hci_stack->gap_classic_accept_callback = accept_callback; 7626 } 7627 #endif 7628 7629 /** 7630 * @brief Set callback for Bluetooth Hardware Error 7631 */ 7632 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7633 hci_stack->hardware_error_callback = fn; 7634 } 7635 7636 void hci_disconnect_all(void){ 7637 btstack_linked_list_iterator_t it; 7638 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7639 while (btstack_linked_list_iterator_has_next(&it)){ 7640 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7641 if (con->state == SENT_DISCONNECT) continue; 7642 con->state = SEND_DISCONNECT; 7643 } 7644 hci_run(); 7645 } 7646 7647 uint16_t hci_get_manufacturer(void){ 7648 return hci_stack->manufacturer; 7649 } 7650 7651 #ifdef ENABLE_BLE 7652 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7653 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7654 if (!hci_con) return NULL; 7655 return &hci_con->sm_connection; 7656 } 7657 7658 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7659 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7660 #endif 7661 7662 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7663 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7664 if (hci_connection == NULL) return 0; 7665 if (hci_is_le_connection(hci_connection)){ 7666 #ifdef ENABLE_BLE 7667 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7668 if (sm_conn->sm_connection_encrypted) { 7669 return sm_conn->sm_actual_encryption_key_size; 7670 } 7671 #endif 7672 } else { 7673 #ifdef ENABLE_CLASSIC 7674 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7675 return hci_connection->encryption_key_size; 7676 } 7677 #endif 7678 } 7679 return 0; 7680 } 7681 7682 bool gap_authenticated(hci_con_handle_t con_handle){ 7683 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7684 if (hci_connection == NULL) return false; 7685 7686 switch (hci_connection->address_type){ 7687 #ifdef ENABLE_BLE 7688 case BD_ADDR_TYPE_LE_PUBLIC: 7689 case BD_ADDR_TYPE_LE_RANDOM: 7690 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7691 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7692 #endif 7693 #ifdef ENABLE_CLASSIC 7694 case BD_ADDR_TYPE_SCO: 7695 case BD_ADDR_TYPE_ACL: 7696 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7697 #endif 7698 default: 7699 return false; 7700 } 7701 } 7702 7703 bool gap_secure_connection(hci_con_handle_t con_handle){ 7704 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7705 if (hci_connection == NULL) return 0; 7706 7707 switch (hci_connection->address_type){ 7708 #ifdef ENABLE_BLE 7709 case BD_ADDR_TYPE_LE_PUBLIC: 7710 case BD_ADDR_TYPE_LE_RANDOM: 7711 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7712 return hci_connection->sm_connection.sm_connection_sc != 0; 7713 #endif 7714 #ifdef ENABLE_CLASSIC 7715 case BD_ADDR_TYPE_SCO: 7716 case BD_ADDR_TYPE_ACL: 7717 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7718 #endif 7719 default: 7720 return false; 7721 } 7722 } 7723 7724 bool gap_bonded(hci_con_handle_t con_handle){ 7725 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7726 if (hci_connection == NULL) return 0; 7727 7728 #ifdef ENABLE_CLASSIC 7729 link_key_t link_key; 7730 link_key_type_t link_key_type; 7731 #endif 7732 switch (hci_connection->address_type){ 7733 #ifdef ENABLE_BLE 7734 case BD_ADDR_TYPE_LE_PUBLIC: 7735 case BD_ADDR_TYPE_LE_RANDOM: 7736 return hci_connection->sm_connection.sm_le_db_index >= 0; 7737 #endif 7738 #ifdef ENABLE_CLASSIC 7739 case BD_ADDR_TYPE_SCO: 7740 case BD_ADDR_TYPE_ACL: 7741 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7742 #endif 7743 default: 7744 return false; 7745 } 7746 } 7747 7748 #ifdef ENABLE_BLE 7749 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7750 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7751 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7752 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7753 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7754 return sm_conn->sm_connection_authorization_state; 7755 } 7756 #endif 7757 7758 #ifdef ENABLE_CLASSIC 7759 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){ 7760 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7761 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7762 conn->sniff_min_interval = sniff_min_interval; 7763 conn->sniff_max_interval = sniff_max_interval; 7764 conn->sniff_attempt = sniff_attempt; 7765 conn->sniff_timeout = sniff_timeout; 7766 hci_run(); 7767 return 0; 7768 } 7769 7770 /** 7771 * @brief Exit Sniff mode 7772 * @param con_handle 7773 @ @return 0 if ok 7774 */ 7775 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7776 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7777 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7778 conn->sniff_min_interval = 0xffff; 7779 hci_run(); 7780 return 0; 7781 } 7782 7783 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){ 7784 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7785 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7786 conn->sniff_subrating_max_latency = max_latency; 7787 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7788 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7789 hci_run(); 7790 return ERROR_CODE_SUCCESS; 7791 } 7792 7793 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){ 7794 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7795 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7796 conn->qos_service_type = service_type; 7797 conn->qos_token_rate = token_rate; 7798 conn->qos_peak_bandwidth = peak_bandwidth; 7799 conn->qos_latency = latency; 7800 conn->qos_delay_variation = delay_variation; 7801 hci_run(); 7802 return ERROR_CODE_SUCCESS; 7803 } 7804 7805 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7806 hci_stack->new_page_scan_interval = page_scan_interval; 7807 hci_stack->new_page_scan_window = page_scan_window; 7808 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7809 hci_run(); 7810 } 7811 7812 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7813 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7814 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7815 hci_run(); 7816 } 7817 7818 void gap_set_page_timeout(uint16_t page_timeout){ 7819 hci_stack->page_timeout = page_timeout; 7820 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7821 hci_run(); 7822 } 7823 7824 #endif 7825 7826 void hci_halting_defer(void){ 7827 if (hci_stack->state != HCI_STATE_HALTING) return; 7828 switch (hci_stack->substate){ 7829 case HCI_HALTING_READY_FOR_CLOSE: 7830 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 7831 break; 7832 default: 7833 break; 7834 } 7835 } 7836 7837 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7838 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7839 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7840 if (le_device_db_index >= le_device_db_max_count()) return; 7841 uint8_t offset = le_device_db_index >> 3; 7842 uint8_t mask = 1 << (le_device_db_index & 7); 7843 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7844 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7845 // note: go back to remove entries, otherwise, a remove + add will skip the add 7846 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7847 } 7848 } 7849 7850 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7851 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7852 if (le_device_db_index >= le_device_db_max_count()) return; 7853 uint8_t offset = le_device_db_index >> 3; 7854 uint8_t mask = 1 << (le_device_db_index & 7); 7855 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7856 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7857 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7858 } 7859 } 7860 7861 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7862 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7863 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7864 } 7865 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7866 // restart le resolving list update 7867 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7868 } 7869 return ERROR_CODE_SUCCESS; 7870 } 7871 #endif 7872 7873 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7874 void hci_setup_test_connections_fuzz(void){ 7875 hci_connection_t * conn; 7876 7877 // default address: 66:55:44:33:00:01 7878 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7879 7880 // setup Controller info 7881 hci_stack->num_cmd_packets = 255; 7882 hci_stack->acl_packets_total_num = 255; 7883 7884 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7885 addr[5] = 0x01; 7886 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7887 conn->con_handle = addr[5]; 7888 conn->role = HCI_ROLE_SLAVE; 7889 conn->state = RECEIVED_CONNECTION_REQUEST; 7890 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7891 7892 // setup incoming Classic SCO connection with con handle 0x0002 7893 addr[5] = 0x02; 7894 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 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 ready Classic ACL connection with con handle 0x0003 7901 addr[5] = 0x03; 7902 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7903 conn->con_handle = addr[5]; 7904 conn->role = HCI_ROLE_SLAVE; 7905 conn->state = OPEN; 7906 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7907 7908 // setup ready Classic SCO connection with con handle 0x0004 7909 addr[5] = 0x04; 7910 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 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 LE ACL connection with con handle 0x005 and public address 7917 addr[5] = 0x05; 7918 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 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 conn->sm_connection.sm_connection_encrypted = 1; 7924 } 7925 7926 void hci_free_connections_fuzz(void){ 7927 btstack_linked_list_iterator_t it; 7928 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7929 while (btstack_linked_list_iterator_has_next(&it)){ 7930 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7931 btstack_linked_list_iterator_remove(&it); 7932 btstack_memory_hci_connection_free(con); 7933 } 7934 } 7935 void hci_simulate_working_fuzz(void){ 7936 hci_stack->le_scanning_param_update = false; 7937 hci_init_done(); 7938 hci_stack->num_cmd_packets = 255; 7939 } 7940 #endif 7941