1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // 136 // compact storage of relevant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into the supported 138 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 139 // 140 141 // format: command name, byte offset, bit nr in 64-byte supported commands 142 #define SUPPORTED_HCI_COMMANDS \ 143 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 144 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 145 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 146 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 147 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 148 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 149 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 151 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 152 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 153 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 154 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 156 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 157 158 // enumerate supported commands 159 #define X(name, offset, bit) name, 160 enum { 161 SUPPORTED_HCI_COMMANDS 162 SUPPORTED_HCI_COMMANDS_COUNT 163 }; 164 #undef X 165 166 // assert supported hci commands bitmap fits into provided storage 167 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 168 #error "Storage for supported HCI commands too small" 169 #endif 170 171 // prototypes 172 #ifdef ENABLE_CLASSIC 173 static void hci_update_scan_enable(void); 174 static void hci_emit_discoverable_enabled(uint8_t enabled); 175 static int hci_local_ssp_activated(void); 176 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 177 static bool hci_ssp_supported(hci_connection_t * connection); 178 static void hci_notify_if_sco_can_send_now(void); 179 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 180 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 181 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 182 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 183 static void hci_connection_timestamp(hci_connection_t *connection); 184 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 185 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 186 #endif 187 188 static int hci_power_control_on(void); 189 static void hci_power_control_off(void); 190 static void hci_state_reset(void); 191 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 192 static void hci_emit_transport_packet_sent(void); 193 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 194 static void hci_emit_nr_connections_changed(void); 195 static void hci_emit_hci_open_failed(void); 196 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 197 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 198 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 199 static void hci_run(void); 200 static int hci_is_le_connection(hci_connection_t * connection); 201 202 #ifdef ENABLE_CLASSIC 203 static int hci_have_usb_transport(void); 204 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 205 #endif 206 207 #ifdef ENABLE_BLE 208 #ifdef ENABLE_LE_CENTRAL 209 // called from test/ble_client/advertising_data_parser.c 210 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 211 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 212 static void hci_whitelist_free(void); 213 static hci_connection_t * gap_get_outgoing_connection(void); 214 static bool hci_run_general_gap_le(void); 215 #endif 216 #endif 217 218 // the STACK is here 219 #ifndef HAVE_MALLOC 220 static hci_stack_t hci_stack_static; 221 #endif 222 static hci_stack_t * hci_stack = NULL; 223 224 #ifdef ENABLE_CLASSIC 225 // default name 226 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 227 228 // test helper 229 static uint8_t disable_l2cap_timeouts = 0; 230 #endif 231 232 // reset connection state on create and on reconnect 233 // don't overwrite addr, con handle, role 234 static void hci_connection_init(hci_connection_t * conn){ 235 conn->authentication_flags = AUTH_FLAG_NONE; 236 conn->bonding_flags = 0; 237 conn->requested_security_level = LEVEL_0; 238 #ifdef ENABLE_CLASSIC 239 conn->request_role = HCI_ROLE_INVALID; 240 conn->sniff_subrating_max_latency = 0xffff; 241 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 242 conn->link_key_type = INVALID_LINK_KEY; 243 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 244 btstack_run_loop_set_timer_context(&conn->timeout, conn); 245 hci_connection_timestamp(conn); 246 #endif 247 conn->acl_recombination_length = 0; 248 conn->acl_recombination_pos = 0; 249 conn->num_packets_sent = 0; 250 251 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 252 #ifdef ENABLE_BLE 253 conn->le_phy_update_all_phys = 0xff; 254 #endif 255 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 256 conn->le_max_tx_octets = 27; 257 #endif 258 #ifdef ENABLE_CLASSIC_PAIRING_OOB 259 conn->classic_oob_c_192 = NULL; 260 conn->classic_oob_r_192 = NULL; 261 conn->classic_oob_c_256 = NULL; 262 conn->classic_oob_r_256 = NULL; 263 #endif 264 } 265 266 /** 267 * create connection for given address 268 * 269 * @return connection OR NULL, if no memory left 270 */ 271 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 272 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 273 274 hci_connection_t * conn = btstack_memory_hci_connection_get(); 275 if (!conn) return NULL; 276 hci_connection_init(conn); 277 278 bd_addr_copy(conn->address, addr); 279 conn->address_type = addr_type; 280 conn->con_handle = HCI_CON_HANDLE_INVALID; 281 conn->role = HCI_ROLE_INVALID; 282 283 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 284 285 return conn; 286 } 287 288 289 /** 290 * get le connection parameter range 291 * 292 * @return le connection parameter range struct 293 */ 294 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 295 *range = hci_stack->le_connection_parameter_range; 296 } 297 298 /** 299 * set le connection parameter range 300 * 301 */ 302 303 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 304 hci_stack->le_connection_parameter_range = *range; 305 } 306 307 /** 308 * @brief Test if connection parameters are inside in existing rage 309 * @param conn_interval_min (unit: 1.25ms) 310 * @param conn_interval_max (unit: 1.25ms) 311 * @param conn_latency 312 * @param supervision_timeout (unit: 10ms) 313 * @return 1 if included 314 */ 315 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 316 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 317 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 318 319 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 320 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 321 322 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 323 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 324 325 return 1; 326 } 327 328 /** 329 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 330 * @note: default: 1 331 * @param max_peripheral_connections 332 */ 333 #ifdef ENABLE_LE_PERIPHERAL 334 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 335 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 336 } 337 #endif 338 339 /** 340 * get hci connections iterator 341 * 342 * @return hci connections iterator 343 */ 344 345 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 346 btstack_linked_list_iterator_init(it, &hci_stack->connections); 347 } 348 349 /** 350 * get connection for a given handle 351 * 352 * @return connection OR NULL, if not found 353 */ 354 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 355 btstack_linked_list_iterator_t it; 356 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 357 while (btstack_linked_list_iterator_has_next(&it)){ 358 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 359 if ( item->con_handle == con_handle ) { 360 return item; 361 } 362 } 363 return NULL; 364 } 365 366 /** 367 * get connection for given address 368 * 369 * @return connection OR NULL, if not found 370 */ 371 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 372 btstack_linked_list_iterator_t it; 373 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 374 while (btstack_linked_list_iterator_has_next(&it)){ 375 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 376 if (connection->address_type != addr_type) continue; 377 if (memcmp(addr, connection->address, 6) != 0) continue; 378 return connection; 379 } 380 return NULL; 381 } 382 383 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 384 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 385 } 386 387 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 388 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 389 } 390 391 #ifdef ENABLE_CLASSIC 392 393 #ifdef ENABLE_SCO_OVER_HCI 394 static int hci_number_sco_connections(void){ 395 int connections = 0; 396 btstack_linked_list_iterator_t it; 397 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 398 while (btstack_linked_list_iterator_has_next(&it)){ 399 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 400 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 401 connections++; 402 } 403 return connections; 404 } 405 #endif 406 407 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 408 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 409 #ifdef HAVE_EMBEDDED_TICK 410 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 411 // connections might be timed out 412 hci_emit_l2cap_check_timeout(connection); 413 } 414 #else 415 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 416 // connections might be timed out 417 hci_emit_l2cap_check_timeout(connection); 418 } 419 #endif 420 } 421 422 static void hci_connection_timestamp(hci_connection_t *connection){ 423 #ifdef HAVE_EMBEDDED_TICK 424 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 425 #else 426 connection->timestamp = btstack_run_loop_get_time_ms(); 427 #endif 428 } 429 430 /** 431 * add authentication flags and reset timer 432 * @note: assumes classic connection 433 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 434 */ 435 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 436 bd_addr_t addr; 437 reverse_bd_addr(bd_addr, addr); 438 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 439 if (conn) { 440 connectionSetAuthenticationFlags(conn, flags); 441 hci_connection_timestamp(conn); 442 } 443 } 444 445 static bool hci_pairing_active(hci_connection_t * hci_connection){ 446 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 447 } 448 449 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 450 if (hci_pairing_active(hci_connection)) return; 451 if (ssp){ 452 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 453 } else { 454 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 455 } 456 // if we are initiator, we have sent an HCI Authenticate Request 457 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 458 459 // if we are responder, use minimal service security level as required level 460 if (!initiator){ 461 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 462 } 463 464 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 465 466 uint8_t event[12]; 467 event[0] = GAP_EVENT_PAIRING_STARTED; 468 event[1] = 10; 469 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 470 reverse_bd_addr(hci_connection->address, &event[4]); 471 event[10] = (uint8_t) ssp; 472 event[11] = (uint8_t) initiator; 473 hci_emit_event(event, sizeof(event), 1); 474 } 475 476 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 477 hci_connection->requested_security_level = LEVEL_0; 478 if (!hci_pairing_active(hci_connection)) return; 479 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 480 #ifdef ENABLE_CLASSIC_PAIRING_OOB 481 hci_connection->classic_oob_c_192 = NULL; 482 hci_connection->classic_oob_r_192 = NULL; 483 hci_connection->classic_oob_c_256 = NULL; 484 hci_connection->classic_oob_r_256 = NULL; 485 #endif 486 log_info("pairing complete, status %02x", status); 487 488 uint8_t event[11]; 489 event[0] = GAP_EVENT_PAIRING_COMPLETE; 490 event[1] = 9; 491 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 492 reverse_bd_addr(hci_connection->address, &event[4]); 493 event[10] = status; 494 hci_emit_event(event, sizeof(event), 1); 495 } 496 497 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 498 hci_connection_t * conn = hci_connection_for_handle(handle); 499 if (!conn) return false; 500 return hci_pairing_active(conn); 501 } 502 503 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 504 if (!hci_stack->link_key_db) return; 505 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 506 hci_stack->link_key_db->delete_link_key(addr); 507 } 508 509 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 510 if (!hci_stack->link_key_db) return; 511 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 512 hci_stack->link_key_db->put_link_key(addr, link_key, type); 513 } 514 515 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 516 if (!hci_stack->link_key_db) return false; 517 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 518 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 519 return result; 520 } 521 522 void gap_delete_all_link_keys(void){ 523 bd_addr_t addr; 524 link_key_t link_key; 525 link_key_type_t type; 526 btstack_link_key_iterator_t it; 527 int ok = gap_link_key_iterator_init(&it); 528 if (!ok) { 529 log_error("could not initialize iterator"); 530 return; 531 } 532 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 533 gap_drop_link_key_for_bd_addr(addr); 534 } 535 gap_link_key_iterator_done(&it); 536 } 537 538 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 539 if (!hci_stack->link_key_db) return 0; 540 if (!hci_stack->link_key_db->iterator_init) return 0; 541 return hci_stack->link_key_db->iterator_init(it); 542 } 543 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 544 if (!hci_stack->link_key_db) return 0; 545 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 546 } 547 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 548 if (!hci_stack->link_key_db) return; 549 hci_stack->link_key_db->iterator_done(it); 550 } 551 #endif 552 553 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 554 switch (address_type){ 555 case BD_ADDR_TYPE_LE_PUBLIC: 556 case BD_ADDR_TYPE_LE_RANDOM: 557 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 558 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 559 return true; 560 default: 561 return false; 562 } 563 } 564 565 static int hci_is_le_connection(hci_connection_t * connection){ 566 return hci_is_le_connection_type(connection->address_type); 567 } 568 569 /** 570 * count connections 571 */ 572 static int nr_hci_connections(void){ 573 int count = 0; 574 btstack_linked_item_t *it; 575 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 576 count++; 577 } 578 return count; 579 } 580 581 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 582 583 unsigned int num_packets_sent_classic = 0; 584 unsigned int num_packets_sent_le = 0; 585 586 btstack_linked_item_t *it; 587 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 588 hci_connection_t * connection = (hci_connection_t *) it; 589 if (hci_is_le_connection(connection)){ 590 num_packets_sent_le += connection->num_packets_sent; 591 } 592 if (connection->address_type == BD_ADDR_TYPE_ACL){ 593 num_packets_sent_classic += connection->num_packets_sent; 594 } 595 } 596 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 597 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 598 int free_slots_le = 0; 599 600 if (free_slots_classic < 0){ 601 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 602 return 0; 603 } 604 605 if (hci_stack->le_acl_packets_total_num){ 606 // if we have LE slots, they are used 607 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 608 if (free_slots_le < 0){ 609 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 610 return 0; 611 } 612 } else { 613 // otherwise, classic slots are used for LE, too 614 free_slots_classic -= num_packets_sent_le; 615 if (free_slots_classic < 0){ 616 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 617 return 0; 618 } 619 } 620 621 switch (address_type){ 622 case BD_ADDR_TYPE_UNKNOWN: 623 log_error("hci_number_free_acl_slots: unknown address type"); 624 return 0; 625 626 case BD_ADDR_TYPE_ACL: 627 return (uint16_t) free_slots_classic; 628 629 default: 630 if (hci_stack->le_acl_packets_total_num > 0){ 631 return (uint16_t) free_slots_le; 632 } 633 return (uint16_t) free_slots_classic; 634 } 635 } 636 637 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 638 // get connection type 639 hci_connection_t * connection = hci_connection_for_handle(con_handle); 640 if (!connection){ 641 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 642 return 0; 643 } 644 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 645 } 646 647 #ifdef ENABLE_CLASSIC 648 static int hci_number_free_sco_slots(void){ 649 unsigned int num_sco_packets_sent = 0; 650 btstack_linked_item_t *it; 651 if (hci_stack->synchronous_flow_control_enabled){ 652 // explicit flow control 653 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 654 hci_connection_t * connection = (hci_connection_t *) it; 655 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 656 num_sco_packets_sent += connection->num_packets_sent; 657 } 658 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 659 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 660 return 0; 661 } 662 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 663 } else { 664 // implicit flow control -- TODO 665 int num_ready = 0; 666 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 667 hci_connection_t * connection = (hci_connection_t *) it; 668 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 669 if (connection->sco_tx_ready == 0) continue; 670 num_ready++; 671 } 672 return num_ready; 673 } 674 } 675 #endif 676 677 // only used to send HCI Host Number Completed Packets 678 static int hci_can_send_comand_packet_transport(void){ 679 if (hci_stack->hci_packet_buffer_reserved) return 0; 680 681 // check for async hci transport implementations 682 if (hci_stack->hci_transport->can_send_packet_now){ 683 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 684 return 0; 685 } 686 } 687 return 1; 688 } 689 690 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 691 bool hci_can_send_command_packet_now(void){ 692 if (hci_can_send_comand_packet_transport() == 0) return false; 693 return hci_stack->num_cmd_packets > 0u; 694 } 695 696 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 697 // check for async hci transport implementations 698 if (!hci_stack->hci_transport->can_send_packet_now) return true; 699 return hci_stack->hci_transport->can_send_packet_now(packet_type); 700 } 701 702 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 703 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 704 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 705 } 706 707 bool hci_can_send_acl_le_packet_now(void){ 708 if (hci_stack->hci_packet_buffer_reserved) return false; 709 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 710 } 711 712 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 713 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 714 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 715 } 716 717 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 718 if (hci_stack->hci_packet_buffer_reserved) return false; 719 return hci_can_send_prepared_acl_packet_now(con_handle); 720 } 721 722 #ifdef ENABLE_CLASSIC 723 bool hci_can_send_acl_classic_packet_now(void){ 724 if (hci_stack->hci_packet_buffer_reserved) return false; 725 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 726 } 727 728 bool hci_can_send_prepared_sco_packet_now(void){ 729 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 730 if (hci_have_usb_transport()){ 731 return hci_stack->sco_can_send_now; 732 } else { 733 return hci_number_free_sco_slots() > 0; 734 } 735 } 736 737 bool hci_can_send_sco_packet_now(void){ 738 if (hci_stack->hci_packet_buffer_reserved) return false; 739 return hci_can_send_prepared_sco_packet_now(); 740 } 741 742 void hci_request_sco_can_send_now_event(void){ 743 hci_stack->sco_waiting_for_can_send_now = 1; 744 hci_notify_if_sco_can_send_now(); 745 } 746 #endif 747 748 // used for internal checks in l2cap.c 749 bool hci_is_packet_buffer_reserved(void){ 750 return hci_stack->hci_packet_buffer_reserved; 751 } 752 753 // reserves outgoing packet buffer. 754 // @return 1 if successful 755 bool hci_reserve_packet_buffer(void){ 756 if (hci_stack->hci_packet_buffer_reserved) { 757 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 758 return false; 759 } 760 hci_stack->hci_packet_buffer_reserved = true; 761 return true; 762 } 763 764 void hci_release_packet_buffer(void){ 765 hci_stack->hci_packet_buffer_reserved = false; 766 } 767 768 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 769 static int hci_transport_synchronous(void){ 770 return hci_stack->hci_transport->can_send_packet_now == NULL; 771 } 772 773 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 774 775 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 776 777 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 778 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 779 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 780 max_acl_data_packet_length = hci_stack->le_data_packets_length; 781 } 782 783 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 784 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 785 max_acl_data_packet_length = connection->le_max_tx_octets; 786 } 787 #endif 788 789 log_debug("hci_send_acl_packet_fragments entered"); 790 791 uint8_t status = ERROR_CODE_SUCCESS; 792 // multiple packets could be send on a synchronous HCI transport 793 while (true){ 794 795 log_debug("hci_send_acl_packet_fragments loop entered"); 796 797 // get current data 798 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 799 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 800 bool more_fragments = false; 801 802 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 803 if (current_acl_data_packet_length > max_acl_data_packet_length){ 804 more_fragments = true; 805 current_acl_data_packet_length = max_acl_data_packet_length; 806 } 807 808 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 809 if (acl_header_pos > 0u){ 810 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 811 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 812 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 813 } 814 815 // update header len 816 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 817 818 // count packet 819 connection->num_packets_sent++; 820 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 821 822 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 823 if (more_fragments){ 824 // update start of next fragment to send 825 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 826 } else { 827 // done 828 hci_stack->acl_fragmentation_pos = 0; 829 hci_stack->acl_fragmentation_total_size = 0; 830 } 831 832 // send packet 833 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 834 const int size = current_acl_data_packet_length + 4; 835 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 836 hci_stack->acl_fragmentation_tx_active = 1; 837 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 838 if (err != 0){ 839 // no error from HCI Transport expected 840 status = ERROR_CODE_HARDWARE_FAILURE; 841 } 842 843 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 844 845 // done yet? 846 if (!more_fragments) break; 847 848 // can send more? 849 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 850 } 851 852 log_debug("hci_send_acl_packet_fragments loop over"); 853 854 // release buffer now for synchronous transport 855 if (hci_transport_synchronous()){ 856 hci_stack->acl_fragmentation_tx_active = 0; 857 hci_release_packet_buffer(); 858 hci_emit_transport_packet_sent(); 859 } 860 861 return status; 862 } 863 864 // pre: caller has reserved the packet buffer 865 uint8_t hci_send_acl_packet_buffer(int size){ 866 btstack_assert(hci_stack->hci_packet_buffer_reserved); 867 868 uint8_t * packet = hci_stack->hci_packet_buffer; 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 873 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 hci_connection_t *connection = hci_connection_for_handle( con_handle); 880 if (!connection) { 881 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 882 hci_release_packet_buffer(); 883 hci_emit_transport_packet_sent(); 884 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 885 } 886 887 #ifdef ENABLE_CLASSIC 888 hci_connection_timestamp(connection); 889 #endif 890 891 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 892 893 // setup data 894 hci_stack->acl_fragmentation_total_size = size; 895 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 896 897 return hci_send_acl_packet_fragments(connection); 898 } 899 900 #ifdef ENABLE_CLASSIC 901 // pre: caller has reserved the packet buffer 902 uint8_t hci_send_sco_packet_buffer(int size){ 903 btstack_assert(hci_stack->hci_packet_buffer_reserved); 904 905 uint8_t * packet = hci_stack->hci_packet_buffer; 906 907 // skip checks in loopback mode 908 if (!hci_stack->loopback_mode){ 909 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 910 911 // check for free places on Bluetooth module 912 if (!hci_can_send_prepared_sco_packet_now()) { 913 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 914 hci_release_packet_buffer(); 915 hci_emit_transport_packet_sent(); 916 return BTSTACK_ACL_BUFFERS_FULL; 917 } 918 919 // track send packet in connection struct 920 hci_connection_t *connection = hci_connection_for_handle( con_handle); 921 if (!connection) { 922 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 923 hci_release_packet_buffer(); 924 hci_emit_transport_packet_sent(); 925 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 926 } 927 928 if (hci_have_usb_transport()){ 929 // token used 930 hci_stack->sco_can_send_now = false; 931 } else { 932 if (hci_stack->synchronous_flow_control_enabled){ 933 connection->num_packets_sent++; 934 } else { 935 connection->sco_tx_ready--; 936 } 937 } 938 } 939 940 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 941 942 #ifdef HAVE_SCO_TRANSPORT 943 hci_stack->sco_transport->send_packet(packet, size); 944 hci_release_packet_buffer(); 945 hci_emit_transport_packet_sent(); 946 947 return 0; 948 #else 949 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 950 if (hci_transport_synchronous()){ 951 hci_release_packet_buffer(); 952 hci_emit_transport_packet_sent(); 953 } 954 955 if (err != 0){ 956 return ERROR_CODE_HARDWARE_FAILURE; 957 } 958 return ERROR_CODE_SUCCESS; 959 #endif 960 } 961 #endif 962 963 static void acl_handler(uint8_t *packet, uint16_t size){ 964 965 // get info 966 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 967 hci_connection_t *conn = hci_connection_for_handle(con_handle); 968 uint8_t acl_flags = READ_ACL_FLAGS(packet); 969 uint16_t acl_length = READ_ACL_LENGTH(packet); 970 971 // ignore non-registered handle 972 if (!conn){ 973 log_error("acl_handler called with non-registered handle %u!" , con_handle); 974 return; 975 } 976 977 // assert packet is complete 978 if ((acl_length + 4u) != size){ 979 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 980 return; 981 } 982 983 #ifdef ENABLE_CLASSIC 984 // update idle timestamp 985 hci_connection_timestamp(conn); 986 #endif 987 988 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 989 hci_stack->host_completed_packets = 1; 990 conn->num_packets_completed++; 991 #endif 992 993 // handle different packet types 994 switch (acl_flags & 0x03u) { 995 996 case 0x01: // continuation fragment 997 998 // sanity checks 999 if (conn->acl_recombination_pos == 0u) { 1000 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1001 return; 1002 } 1003 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1004 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1005 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1006 conn->acl_recombination_pos = 0; 1007 return; 1008 } 1009 1010 // append fragment payload (header already stored) 1011 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1012 &packet[4], acl_length); 1013 conn->acl_recombination_pos += acl_length; 1014 1015 // forward complete L2CAP packet if complete. 1016 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1017 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1018 // reset recombination buffer 1019 conn->acl_recombination_length = 0; 1020 conn->acl_recombination_pos = 0; 1021 } 1022 break; 1023 1024 case 0x02: { // first fragment 1025 1026 // sanity check 1027 if (conn->acl_recombination_pos) { 1028 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1029 conn->acl_recombination_pos = 0; 1030 } 1031 1032 // peek into L2CAP packet! 1033 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1034 1035 // compare fragment size to L2CAP packet size 1036 if (acl_length >= (l2cap_length + 4u)){ 1037 // forward fragment as L2CAP packet 1038 hci_emit_acl_packet(packet, acl_length + 4u); 1039 } else { 1040 1041 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1042 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1043 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1044 return; 1045 } 1046 1047 // store first fragment and tweak acl length for complete package 1048 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1049 packet, acl_length + 4u); 1050 conn->acl_recombination_pos = acl_length + 4u; 1051 conn->acl_recombination_length = l2cap_length; 1052 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1053 } 1054 break; 1055 1056 } 1057 default: 1058 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1059 return; 1060 } 1061 1062 // execute main loop 1063 hci_run(); 1064 } 1065 1066 static void hci_connection_stop_timer(hci_connection_t * conn){ 1067 btstack_run_loop_remove_timer(&conn->timeout); 1068 #ifdef ENABLE_CLASSIC 1069 btstack_run_loop_remove_timer(&conn->timeout_sco); 1070 #endif 1071 } 1072 1073 static void hci_shutdown_connection(hci_connection_t *conn){ 1074 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1075 1076 #ifdef ENABLE_CLASSIC 1077 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1078 bd_addr_type_t addr_type = conn->address_type; 1079 #endif 1080 #ifdef HAVE_SCO_TRANSPORT 1081 hci_con_handle_t con_handle = conn->con_handle; 1082 #endif 1083 #endif 1084 1085 hci_connection_stop_timer(conn); 1086 1087 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1088 btstack_memory_hci_connection_free( conn ); 1089 1090 // now it's gone 1091 hci_emit_nr_connections_changed(); 1092 1093 #ifdef ENABLE_CLASSIC 1094 #ifdef ENABLE_SCO_OVER_HCI 1095 // update SCO 1096 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1097 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1098 } 1099 #endif 1100 #ifdef HAVE_SCO_TRANSPORT 1101 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1102 hci_stack->sco_transport->close(con_handle); 1103 } 1104 #endif 1105 #endif 1106 } 1107 1108 #ifdef ENABLE_CLASSIC 1109 1110 static const uint16_t packet_type_sizes[] = { 1111 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1112 HCI_ACL_DH1_SIZE, 0, 0, 0, 1113 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1114 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1115 }; 1116 static const uint8_t packet_type_feature_requirement_bit[] = { 1117 0, // 3 slot packets 1118 1, // 5 slot packets 1119 25, // EDR 2 mpbs 1120 26, // EDR 3 mbps 1121 39, // 3 slot EDR packts 1122 40, // 5 slot EDR packet 1123 }; 1124 static const uint16_t packet_type_feature_packet_mask[] = { 1125 0x0f00, // 3 slot packets 1126 0xf000, // 5 slot packets 1127 0x1102, // EDR 2 mpbs 1128 0x2204, // EDR 3 mbps 1129 0x0300, // 3 slot EDR packts 1130 0x3000, // 5 slot EDR packet 1131 }; 1132 1133 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1134 // enable packet types based on size 1135 uint16_t packet_types = 0; 1136 unsigned int i; 1137 for (i=0;i<16;i++){ 1138 if (packet_type_sizes[i] == 0) continue; 1139 if (packet_type_sizes[i] <= buffer_size){ 1140 packet_types |= 1 << i; 1141 } 1142 } 1143 // disable packet types due to missing local supported features 1144 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1145 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1146 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1147 if (feature_set) continue; 1148 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1149 packet_types &= ~packet_type_feature_packet_mask[i]; 1150 } 1151 // flip bits for "may not be used" 1152 packet_types ^= 0x3306; 1153 return packet_types; 1154 } 1155 1156 uint16_t hci_usable_acl_packet_types(void){ 1157 return hci_stack->packet_types; 1158 } 1159 #endif 1160 1161 uint8_t* hci_get_outgoing_packet_buffer(void){ 1162 // hci packet buffer is >= acl data packet length 1163 return hci_stack->hci_packet_buffer; 1164 } 1165 1166 uint16_t hci_max_acl_data_packet_length(void){ 1167 return hci_stack->acl_data_packet_length; 1168 } 1169 1170 #ifdef ENABLE_CLASSIC 1171 bool hci_extended_sco_link_supported(void){ 1172 // No. 31, byte 3, bit 7 1173 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1174 } 1175 #endif 1176 1177 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1178 // No. 54, byte 6, bit 6 1179 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1180 } 1181 1182 #ifdef ENABLE_CLASSIC 1183 static int gap_ssp_supported(void){ 1184 // No. 51, byte 6, bit 3 1185 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1186 } 1187 #endif 1188 1189 static int hci_classic_supported(void){ 1190 #ifdef ENABLE_CLASSIC 1191 // No. 37, byte 4, bit 5, = No BR/EDR Support 1192 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1193 #else 1194 return 0; 1195 #endif 1196 } 1197 1198 static int hci_le_supported(void){ 1199 #ifdef ENABLE_BLE 1200 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1201 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1202 #else 1203 return 0; 1204 #endif 1205 } 1206 1207 static bool hci_command_supported(uint8_t command_index){ 1208 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1209 } 1210 1211 #ifdef ENABLE_BLE 1212 1213 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1214 static bool hci_extended_advertising_supported(void){ 1215 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1216 } 1217 #endif 1218 1219 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1220 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1221 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1222 } else { 1223 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1224 } 1225 } 1226 1227 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1228 *addr_type = hci_stack->le_own_addr_type; 1229 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1230 } 1231 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1234 *addr_type = hci_stack->le_advertisements_own_addr_type; 1235 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1236 }; 1237 #endif 1238 1239 #ifdef ENABLE_LE_CENTRAL 1240 1241 /** 1242 * @brief Get own addr type and address used for LE connections (Central) 1243 */ 1244 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1245 *addr_type = hci_stack->le_connection_own_addr_type; 1246 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1247 } 1248 1249 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1250 1251 uint16_t offset = 3; 1252 uint8_t num_reports = packet[offset]; 1253 offset += 1; 1254 1255 uint16_t i; 1256 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1257 for (i=0; (i<num_reports) && (offset < size);i++){ 1258 // sanity checks on data_length: 1259 uint8_t data_length = packet[offset + 8]; 1260 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1261 if ((offset + 9u + data_length + 1u) > size) return; 1262 // setup event 1263 uint8_t event_size = 10u + data_length; 1264 uint16_t pos = 0; 1265 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1266 event[pos++] = event_size; 1267 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1268 offset += 8; 1269 pos += 8; 1270 event[pos++] = packet[offset + 1 + data_length]; // rssi 1271 event[pos++] = data_length; 1272 offset++; 1273 (void)memcpy(&event[pos], &packet[offset], data_length); 1274 pos += data_length; 1275 offset += data_length + 1u; // rssi 1276 hci_emit_event(event, pos, 1); 1277 } 1278 } 1279 1280 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1281 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1282 uint16_t offset = 3; 1283 uint8_t num_reports = packet[offset++]; 1284 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1285 uint8_t i; 1286 for (i=0; (i<num_reports) && (offset < size);i++){ 1287 // sanity checks on data_length: 1288 uint16_t data_length = packet[offset + 23]; 1289 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1290 if ((offset + 24u + data_length) > size) return; 1291 uint16_t event_type = little_endian_read_16(packet, offset); 1292 offset += 2; 1293 if ((event_type & 0x10) != 0) { 1294 // setup legacy event 1295 uint8_t legacy_event_type; 1296 switch (event_type){ 1297 case 0b0010011: 1298 // ADV_IND 1299 legacy_event_type = 0; 1300 break; 1301 case 0b0010101: 1302 // ADV_DIRECT_IND 1303 legacy_event_type = 1; 1304 break; 1305 case 0b0010010: 1306 // ADV_SCAN_IND 1307 legacy_event_type = 2; 1308 break; 1309 case 0b0010000: 1310 // ADV_NONCONN_IND 1311 legacy_event_type = 3; 1312 break; 1313 case 0b0011011: 1314 case 0b0011010: 1315 // SCAN_RSP 1316 legacy_event_type = 4; 1317 break; 1318 default: 1319 legacy_event_type = 0; 1320 break; 1321 } 1322 uint16_t pos = 0; 1323 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1324 event[pos++] = 10u + data_length; 1325 event[pos++] = legacy_event_type; 1326 // copy address type + address 1327 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1328 offset += 7; 1329 pos += 7; 1330 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1331 offset += 4; 1332 // copy rssi 1333 event[pos++] = packet[offset++]; 1334 // skip periodic advertising interval and direct address 1335 offset += 9; 1336 // copy data len + data; 1337 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1338 pos += 1 +data_length; 1339 offset += 1+ data_length; 1340 hci_emit_event(event, pos, 1); 1341 } else { 1342 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1343 uint8_t report_len = 24 + data_length; 1344 event[1] = report_len; 1345 memcpy(&event[2], &packet[offset], report_len); 1346 offset += report_len; 1347 hci_emit_event(event, 2 + report_len, 1); 1348 } 1349 } 1350 } 1351 #endif 1352 1353 #endif 1354 #endif 1355 1356 #ifdef ENABLE_BLE 1357 #ifdef ENABLE_LE_PERIPHERAL 1358 static void hci_update_advertisements_enabled_for_current_roles(void){ 1359 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1360 // get number of active le slave connections 1361 int num_slave_connections = 0; 1362 btstack_linked_list_iterator_t it; 1363 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1364 while (btstack_linked_list_iterator_has_next(&it)){ 1365 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1366 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1367 if (con->state != OPEN) continue; 1368 if (con->role != HCI_ROLE_SLAVE) continue; 1369 if (!hci_is_le_connection(con)) continue; 1370 num_slave_connections++; 1371 } 1372 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1373 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1374 } else { 1375 hci_stack->le_advertisements_enabled_for_current_roles = false; 1376 } 1377 } 1378 #endif 1379 #endif 1380 1381 #ifdef ENABLE_CLASSIC 1382 static void gap_run_set_local_name(void){ 1383 hci_reserve_packet_buffer(); 1384 uint8_t * packet = hci_stack->hci_packet_buffer; 1385 // construct HCI Command and send 1386 uint16_t opcode = hci_write_local_name.opcode; 1387 hci_stack->last_cmd_opcode = opcode; 1388 packet[0] = opcode & 0xff; 1389 packet[1] = opcode >> 8; 1390 packet[2] = DEVICE_NAME_LEN; 1391 memset(&packet[3], 0, DEVICE_NAME_LEN); 1392 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1393 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1394 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1395 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1396 // expand '00:00:00:00:00:00' in name with bd_addr 1397 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1398 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1399 } 1400 1401 static void gap_run_set_eir_data(void){ 1402 hci_reserve_packet_buffer(); 1403 uint8_t * packet = hci_stack->hci_packet_buffer; 1404 // construct HCI Command in-place and send 1405 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1406 hci_stack->last_cmd_opcode = opcode; 1407 uint16_t offset = 0; 1408 packet[offset++] = opcode & 0xff; 1409 packet[offset++] = opcode >> 8; 1410 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1411 packet[offset++] = 0; // FEC not required 1412 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1413 if (hci_stack->eir_data){ 1414 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1415 ad_context_t context; 1416 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1417 uint8_t data_type = ad_iterator_get_data_type(&context); 1418 uint8_t size = ad_iterator_get_data_len(&context); 1419 const uint8_t *data = ad_iterator_get_data(&context); 1420 // copy item 1421 packet[offset++] = size + 1; 1422 packet[offset++] = data_type; 1423 memcpy(&packet[offset], data, size); 1424 // update name item 1425 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1426 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1427 } 1428 offset += size; 1429 } 1430 } else { 1431 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1432 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1433 packet[offset++] = bytes_to_copy + 1; 1434 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1435 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1436 // expand '00:00:00:00:00:00' in name with bd_addr 1437 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1438 } 1439 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1440 } 1441 1442 static void hci_run_gap_tasks_classic(void){ 1443 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1444 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1445 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1446 return; 1447 } 1448 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1449 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1450 gap_run_set_local_name(); 1451 return; 1452 } 1453 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1454 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1455 gap_run_set_eir_data(); 1456 return; 1457 } 1458 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1459 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1460 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1461 return; 1462 } 1463 // write page scan activity 1464 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1465 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1466 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1467 return; 1468 } 1469 // write page scan type 1470 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1471 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1472 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1473 return; 1474 } 1475 // write page timeout 1476 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1477 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1478 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1479 return; 1480 } 1481 // send scan enable 1482 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1483 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1484 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1485 return; 1486 } 1487 // send write scan activity 1488 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1489 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1490 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1491 return; 1492 } 1493 } 1494 #endif 1495 1496 #ifndef HAVE_HOST_CONTROLLER_API 1497 1498 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1499 if (!hci_stack->config) return 0; 1500 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1501 // Limit baud rate for Broadcom chipsets to 3 mbps 1502 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1503 baud_rate = 3000000; 1504 } 1505 return baud_rate; 1506 } 1507 1508 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1509 UNUSED(ds); 1510 1511 switch (hci_stack->substate){ 1512 case HCI_INIT_W4_SEND_RESET: 1513 log_info("Resend HCI Reset"); 1514 hci_stack->substate = HCI_INIT_SEND_RESET; 1515 hci_stack->num_cmd_packets = 1; 1516 hci_run(); 1517 break; 1518 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1519 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1520 if (hci_stack->hci_transport->reset_link){ 1521 hci_stack->hci_transport->reset_link(); 1522 } 1523 1524 /* fall through */ 1525 1526 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1527 log_info("Resend HCI Reset - CSR Warm Boot"); 1528 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1529 hci_stack->num_cmd_packets = 1; 1530 hci_run(); 1531 break; 1532 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1533 if (hci_stack->hci_transport->set_baudrate){ 1534 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1535 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1536 hci_stack->hci_transport->set_baudrate(baud_rate); 1537 } 1538 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1539 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1540 if (hci_stack->hci_transport->reset_link){ 1541 log_info("Link Reset"); 1542 hci_stack->hci_transport->reset_link(); 1543 } 1544 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1545 hci_run(); 1546 } 1547 break; 1548 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1549 // otherwise continue 1550 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1551 hci_send_cmd(&hci_read_local_supported_commands); 1552 break; 1553 default: 1554 break; 1555 } 1556 } 1557 #endif 1558 1559 static void hci_initializing_next_state(void){ 1560 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1561 } 1562 1563 static void hci_init_done(void){ 1564 // done. tell the app 1565 log_info("hci_init_done -> HCI_STATE_WORKING"); 1566 hci_stack->state = HCI_STATE_WORKING; 1567 hci_emit_state(); 1568 } 1569 1570 // assumption: hci_can_send_command_packet_now() == true 1571 static void hci_initializing_run(void){ 1572 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1573 1574 if (!hci_can_send_command_packet_now()) return; 1575 1576 #ifndef HAVE_HOST_CONTROLLER_API 1577 bool need_baud_change = hci_stack->config 1578 && hci_stack->chipset 1579 && hci_stack->chipset->set_baudrate_command 1580 && hci_stack->hci_transport->set_baudrate 1581 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1582 #endif 1583 1584 switch (hci_stack->substate){ 1585 case HCI_INIT_SEND_RESET: 1586 hci_state_reset(); 1587 1588 #ifndef HAVE_HOST_CONTROLLER_API 1589 // prepare reset if command complete not received in 100ms 1590 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1591 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1592 btstack_run_loop_add_timer(&hci_stack->timeout); 1593 #endif 1594 // send command 1595 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1596 hci_send_cmd(&hci_reset); 1597 break; 1598 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1599 hci_send_cmd(&hci_read_local_version_information); 1600 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1601 break; 1602 1603 #ifndef HAVE_HOST_CONTROLLER_API 1604 case HCI_INIT_SEND_READ_LOCAL_NAME: 1605 hci_send_cmd(&hci_read_local_name); 1606 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1607 break; 1608 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1609 hci_state_reset(); 1610 // prepare reset if command complete not received in 100ms 1611 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1612 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1613 btstack_run_loop_add_timer(&hci_stack->timeout); 1614 // send command 1615 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1616 hci_send_cmd(&hci_reset); 1617 break; 1618 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1619 hci_state_reset(); 1620 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1621 hci_send_cmd(&hci_reset); 1622 break; 1623 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1624 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1625 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1626 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1627 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1628 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1629 break; 1630 } 1631 case HCI_INIT_SET_BD_ADDR: 1632 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1633 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1634 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1635 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1636 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1637 break; 1638 case HCI_INIT_SEND_BAUD_CHANGE: 1639 if (need_baud_change) { 1640 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1641 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1642 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1643 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1644 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1645 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1646 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1647 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1648 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1649 btstack_run_loop_add_timer(&hci_stack->timeout); 1650 } 1651 break; 1652 } 1653 1654 /* fall through */ 1655 1656 case HCI_INIT_CUSTOM_INIT: 1657 // Custom initialization 1658 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1659 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1660 bool send_cmd = false; 1661 switch (hci_stack->chipset_result){ 1662 case BTSTACK_CHIPSET_VALID_COMMAND: 1663 send_cmd = true; 1664 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1665 break; 1666 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1667 send_cmd = true; 1668 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1669 log_info("CSR Warm Boot"); 1670 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1671 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1672 btstack_run_loop_add_timer(&hci_stack->timeout); 1673 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1674 && hci_stack->config 1675 && hci_stack->chipset 1676 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1677 && hci_stack->hci_transport->set_baudrate 1678 && hci_transport_uart_get_main_baud_rate()){ 1679 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1680 } else { 1681 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1682 } 1683 break; 1684 default: 1685 break; 1686 } 1687 1688 if (send_cmd){ 1689 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1690 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1691 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1692 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1693 break; 1694 } 1695 log_info("Init script done"); 1696 1697 // Init script download on Broadcom chipsets causes: 1698 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1699 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1700 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1701 1702 // - baud rate to reset, restore UART baud rate if needed 1703 if (need_baud_change) { 1704 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1705 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1706 hci_stack->hci_transport->set_baudrate(baud_rate); 1707 } 1708 1709 uint16_t bcm_delay_ms = 300; 1710 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1711 // -> Work around: wait here. 1712 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1713 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1714 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1715 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1716 btstack_run_loop_add_timer(&hci_stack->timeout); 1717 break; 1718 } 1719 } 1720 #endif 1721 /* fall through */ 1722 1723 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1724 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1725 hci_send_cmd(&hci_read_local_supported_commands); 1726 break; 1727 case HCI_INIT_READ_BD_ADDR: 1728 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1729 hci_send_cmd(&hci_read_bd_addr); 1730 break; 1731 case HCI_INIT_READ_BUFFER_SIZE: 1732 // only read buffer size if supported 1733 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1734 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1735 hci_send_cmd(&hci_read_buffer_size); 1736 break; 1737 } 1738 1739 /* fall through */ 1740 1741 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1742 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1743 hci_send_cmd(&hci_read_local_supported_features); 1744 break; 1745 1746 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1747 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1748 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1749 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1750 break; 1751 case HCI_INIT_HOST_BUFFER_SIZE: 1752 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1753 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1754 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1755 break; 1756 #endif 1757 1758 case HCI_INIT_SET_EVENT_MASK: 1759 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1760 if (hci_le_supported()){ 1761 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1762 } else { 1763 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1764 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1765 } 1766 break; 1767 1768 #ifdef ENABLE_CLASSIC 1769 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1770 if (hci_classic_supported() && gap_ssp_supported()){ 1771 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1772 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1773 break; 1774 } 1775 1776 /* fall through */ 1777 1778 case HCI_INIT_WRITE_INQUIRY_MODE: 1779 if (hci_classic_supported()){ 1780 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1781 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1782 break; 1783 } 1784 1785 /* fall through */ 1786 1787 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1788 // skip write secure connections host support if not supported or disabled 1789 if (hci_classic_supported() && hci_stack->secure_connections_enable 1790 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1791 hci_stack->secure_connections_active = true; 1792 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1793 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1794 break; 1795 } 1796 1797 #ifdef ENABLE_SCO_OVER_HCI 1798 /* fall through */ 1799 1800 // only sent if ENABLE_SCO_OVER_HCI is defined 1801 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1802 // skip write synchronous flow control if not supported 1803 if (hci_classic_supported() 1804 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1805 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1806 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1807 break; 1808 } 1809 /* fall through */ 1810 1811 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1812 // skip write default erroneous data reporting if not supported 1813 if (hci_classic_supported() 1814 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1815 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1816 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1817 break; 1818 } 1819 #endif 1820 1821 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1822 /* fall through */ 1823 1824 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1825 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1826 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1827 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1828 #ifdef ENABLE_SCO_OVER_HCI 1829 log_info("BCM: Route SCO data via HCI transport"); 1830 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1831 #endif 1832 #ifdef ENABLE_SCO_OVER_PCM 1833 log_info("BCM: Route SCO data via PCM interface"); 1834 #ifdef ENABLE_BCM_PCM_WBS 1835 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1836 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1837 #else 1838 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1839 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1840 #endif 1841 #endif 1842 break; 1843 } 1844 #endif 1845 1846 #ifdef ENABLE_SCO_OVER_PCM 1847 /* fall through */ 1848 1849 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1850 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1851 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1852 log_info("BCM: Config PCM interface for I2S"); 1853 #ifdef ENABLE_BCM_PCM_WBS 1854 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1855 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1856 #else 1857 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1858 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1859 #endif 1860 break; 1861 } 1862 #endif 1863 #endif 1864 1865 #ifdef ENABLE_BLE 1866 /* fall through */ 1867 1868 // LE INIT 1869 case HCI_INIT_LE_READ_BUFFER_SIZE: 1870 if (hci_le_supported()){ 1871 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1872 hci_send_cmd(&hci_le_read_buffer_size); 1873 break; 1874 } 1875 1876 /* fall through */ 1877 1878 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1879 // skip write le host if not supported (e.g. on LE only EM9301) 1880 if (hci_le_supported() 1881 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1882 // LE Supported Host = 1, Simultaneous Host = 0 1883 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1884 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1885 break; 1886 } 1887 1888 /* fall through */ 1889 1890 case HCI_INIT_LE_SET_EVENT_MASK: 1891 if (hci_le_supported()){ 1892 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1893 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1894 break; 1895 } 1896 #endif 1897 1898 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1899 /* fall through */ 1900 1901 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1902 if (hci_le_supported() 1903 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1904 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1905 hci_send_cmd(&hci_le_read_maximum_data_length); 1906 break; 1907 } 1908 1909 /* fall through */ 1910 1911 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1912 if (hci_le_supported() 1913 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1914 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1915 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1916 break; 1917 } 1918 #endif 1919 1920 #ifdef ENABLE_LE_CENTRAL 1921 /* fall through */ 1922 1923 case HCI_INIT_READ_WHITE_LIST_SIZE: 1924 if (hci_le_supported()){ 1925 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1926 hci_send_cmd(&hci_le_read_white_list_size); 1927 break; 1928 } 1929 1930 #endif 1931 1932 #ifdef ENABLE_LE_PERIPHERAL 1933 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1934 /* fall through */ 1935 1936 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1937 if (hci_extended_advertising_supported()){ 1938 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1939 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1940 break; 1941 } 1942 #endif 1943 #endif 1944 /* fall through */ 1945 1946 case HCI_INIT_DONE: 1947 hci_stack->substate = HCI_INIT_DONE; 1948 // main init sequence complete 1949 #ifdef ENABLE_CLASSIC 1950 // check if initial Classic GAP Tasks are completed 1951 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1952 hci_run_gap_tasks_classic(); 1953 break; 1954 } 1955 #endif 1956 #ifdef ENABLE_BLE 1957 #ifdef ENABLE_LE_CENTRAL 1958 // check if initial LE GAP Tasks are completed 1959 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1960 hci_run_general_gap_le(); 1961 break; 1962 } 1963 #endif 1964 #endif 1965 hci_init_done(); 1966 break; 1967 1968 default: 1969 return; 1970 } 1971 } 1972 1973 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1974 bool command_completed = false; 1975 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1976 uint16_t opcode = little_endian_read_16(packet,3); 1977 if (opcode == hci_stack->last_cmd_opcode){ 1978 command_completed = true; 1979 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1980 } else { 1981 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1982 } 1983 } 1984 1985 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1986 uint8_t status = packet[2]; 1987 uint16_t opcode = little_endian_read_16(packet,4); 1988 if (opcode == hci_stack->last_cmd_opcode){ 1989 if (status){ 1990 command_completed = true; 1991 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1992 } else { 1993 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1994 } 1995 } else { 1996 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1997 } 1998 } 1999 #ifndef HAVE_HOST_CONTROLLER_API 2000 // Vendor == CSR 2001 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2002 // TODO: track actual command 2003 command_completed = true; 2004 } 2005 2006 // Vendor == Toshiba 2007 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2008 // TODO: track actual command 2009 command_completed = true; 2010 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2011 hci_stack->num_cmd_packets = 1; 2012 } 2013 #endif 2014 2015 return command_completed; 2016 } 2017 2018 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2019 2020 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2021 2022 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2023 2024 #ifndef HAVE_HOST_CONTROLLER_API 2025 2026 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2027 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2028 // 2029 // HCI Reset 2030 // Timeout 100 ms 2031 // HCI Reset 2032 // Command Complete Reset 2033 // HCI Read Local Version Information 2034 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2035 // hang... 2036 // 2037 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2038 if (!command_completed 2039 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2040 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2041 2042 uint16_t opcode = little_endian_read_16(packet,3); 2043 if (opcode == hci_reset.opcode){ 2044 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2045 return; 2046 } 2047 } 2048 2049 // CSR & H5 2050 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2051 if (!command_completed 2052 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2053 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2054 2055 uint16_t opcode = little_endian_read_16(packet,3); 2056 if (opcode == hci_reset.opcode){ 2057 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2058 return; 2059 } 2060 } 2061 2062 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2063 // fix: Correct substate and behave as command below 2064 if (command_completed){ 2065 switch (hci_stack->substate){ 2066 case HCI_INIT_SEND_RESET: 2067 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2068 break; 2069 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2070 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2071 break; 2072 default: 2073 break; 2074 } 2075 } 2076 2077 #endif 2078 2079 if (!command_completed) return; 2080 2081 bool need_baud_change = false; 2082 bool need_addr_change = false; 2083 2084 #ifndef HAVE_HOST_CONTROLLER_API 2085 need_baud_change = hci_stack->config 2086 && hci_stack->chipset 2087 && hci_stack->chipset->set_baudrate_command 2088 && hci_stack->hci_transport->set_baudrate 2089 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2090 2091 need_addr_change = hci_stack->custom_bd_addr_set 2092 && hci_stack->chipset 2093 && hci_stack->chipset->set_bd_addr_command; 2094 #endif 2095 2096 switch(hci_stack->substate){ 2097 2098 #ifndef HAVE_HOST_CONTROLLER_API 2099 case HCI_INIT_SEND_RESET: 2100 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2101 // fix: just correct substate and behave as command below 2102 2103 /* fall through */ 2104 #endif 2105 2106 case HCI_INIT_W4_SEND_RESET: 2107 btstack_run_loop_remove_timer(&hci_stack->timeout); 2108 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2109 return; 2110 2111 #ifndef HAVE_HOST_CONTROLLER_API 2112 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2113 // for STLC2500D, baud rate change already happened. 2114 // for others, baud rate gets changed now 2115 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2116 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2117 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2118 hci_stack->hci_transport->set_baudrate(baud_rate); 2119 } 2120 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2121 return; 2122 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2123 btstack_run_loop_remove_timer(&hci_stack->timeout); 2124 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2125 return; 2126 case HCI_INIT_W4_CUSTOM_INIT: 2127 // repeat custom init 2128 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2129 return; 2130 #endif 2131 2132 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2133 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2134 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2135 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2136 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2137 return; 2138 } 2139 if (need_addr_change){ 2140 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2141 return; 2142 } 2143 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2144 return; 2145 #ifndef HAVE_HOST_CONTROLLER_API 2146 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2147 if (need_baud_change){ 2148 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2149 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2150 hci_stack->hci_transport->set_baudrate(baud_rate); 2151 } 2152 if (need_addr_change){ 2153 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2154 return; 2155 } 2156 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2157 return; 2158 case HCI_INIT_W4_SET_BD_ADDR: 2159 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2160 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2161 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2162 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2163 return; 2164 } 2165 // skipping st warm boot 2166 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2167 return; 2168 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2169 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2170 return; 2171 #endif 2172 2173 case HCI_INIT_DONE: 2174 // set state if we came here by fall through 2175 hci_stack->substate = HCI_INIT_DONE; 2176 return; 2177 2178 default: 2179 break; 2180 } 2181 hci_initializing_next_state(); 2182 } 2183 2184 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2185 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2186 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2187 // check if the hci connection has been outgoing 2188 switch (conn->state){ 2189 case SEND_CREATE_CONNECTION: 2190 case RECEIVED_CONNECTION_REQUEST: 2191 break; 2192 default: 2193 return; 2194 } 2195 2196 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2197 bd_addr_t bd_address; 2198 (void)memcpy(&bd_address, conn->address, 6); 2199 2200 #ifdef ENABLE_CLASSIC 2201 // cache needed data 2202 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2203 #endif 2204 2205 // connection failed, remove entry 2206 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2207 btstack_memory_hci_connection_free( conn ); 2208 2209 #ifdef ENABLE_CLASSIC 2210 // notify client if dedicated bonding 2211 if (notify_dedicated_bonding_failed){ 2212 log_info("hci notify_dedicated_bonding_failed"); 2213 hci_emit_dedicated_bonding_result(bd_address, status); 2214 } 2215 2216 // if authentication error, also delete link key 2217 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2218 gap_drop_link_key_for_bd_addr(bd_address); 2219 } 2220 #else 2221 UNUSED(status); 2222 #endif 2223 } 2224 2225 #ifdef ENABLE_CLASSIC 2226 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2227 // SSP Controller 2228 if (features[6] & (1 << 3)){ 2229 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2230 } 2231 // eSCO 2232 if (features[3] & (1<<7)){ 2233 conn->remote_supported_features[0] |= 1; 2234 } 2235 // Extended features 2236 if (features[7] & (1<<7)){ 2237 conn->remote_supported_features[0] |= 2; 2238 } 2239 } 2240 2241 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2242 // SSP Host 2243 if (features[0] & (1 << 0)){ 2244 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2245 } 2246 // SC Host 2247 if (features[0] & (1 << 3)){ 2248 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2249 } 2250 } 2251 2252 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2253 // SC Controller 2254 if (features[1] & (1 << 0)){ 2255 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2256 } 2257 } 2258 2259 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2260 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2261 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2262 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2263 if (conn->bonding_flags & BONDING_DEDICATED){ 2264 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2265 } 2266 } 2267 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2268 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2269 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2270 } 2271 2272 #endif 2273 2274 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2275 // handle BT initialization 2276 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2277 hci_initializing_event_handler(packet, size); 2278 } 2279 2280 // help with BT sleep 2281 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2282 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2283 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2284 hci_initializing_next_state(); 2285 } 2286 } 2287 2288 #ifdef ENABLE_CLASSIC 2289 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2290 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2291 conn->encryption_key_size = encryption_key_size; 2292 2293 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2294 conn->requested_security_level = LEVEL_0; 2295 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2296 return; 2297 } 2298 2299 // Request remote features if not already done 2300 hci_trigger_remote_features_for_connection(conn); 2301 2302 // Request Authentication if not already done 2303 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2304 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2305 } 2306 #endif 2307 2308 static void hci_store_local_supported_commands(const uint8_t * packet){ 2309 // create mapping table 2310 #define X(name, offset, bit) { offset, bit }, 2311 static struct { 2312 uint8_t byte_offset; 2313 uint8_t bit_position; 2314 } supported_hci_commands_map [] = { 2315 SUPPORTED_HCI_COMMANDS 2316 }; 2317 #undef X 2318 2319 // create names for debug purposes 2320 #ifdef ENABLE_LOG_DEBUG 2321 #define X(name, offset, bit) #name, 2322 static const char * command_names[] = { 2323 SUPPORTED_HCI_COMMANDS 2324 }; 2325 #undef X 2326 #endif 2327 2328 hci_stack->local_supported_commands = 0; 2329 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2330 uint16_t i; 2331 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2332 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2333 #ifdef ENABLE_LOG_DEBUG 2334 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); 2335 #else 2336 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2337 #endif 2338 hci_stack->local_supported_commands |= (1LU << i); 2339 } 2340 } 2341 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2342 } 2343 2344 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2345 UNUSED(size); 2346 2347 uint16_t manufacturer; 2348 #ifdef ENABLE_CLASSIC 2349 hci_con_handle_t handle; 2350 hci_connection_t * conn; 2351 uint8_t status; 2352 #endif 2353 // get num cmd packets - limit to 1 to reduce complexity 2354 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2355 2356 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2357 switch (opcode){ 2358 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2359 if (packet[5]) break; 2360 // terminate, name 248 chars 2361 packet[6+248] = 0; 2362 log_info("local name: %s", &packet[6]); 2363 break; 2364 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2365 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2366 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2367 uint16_t acl_len = little_endian_read_16(packet, 6); 2368 uint16_t sco_len = packet[8]; 2369 2370 // determine usable ACL/SCO payload size 2371 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2372 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2373 2374 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2375 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2376 2377 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2378 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2379 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2380 } 2381 break; 2382 case HCI_OPCODE_HCI_READ_RSSI: 2383 if (packet[5] == ERROR_CODE_SUCCESS){ 2384 uint8_t event[5]; 2385 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2386 event[1] = 3; 2387 (void)memcpy(&event[2], &packet[6], 3); 2388 hci_emit_event(event, sizeof(event), 1); 2389 } 2390 break; 2391 #ifdef ENABLE_BLE 2392 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2393 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2394 hci_stack->le_acl_packets_total_num = packet[8]; 2395 // determine usable ACL payload size 2396 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2397 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2398 } 2399 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2400 break; 2401 #endif 2402 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2403 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2404 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2405 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2406 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); 2407 break; 2408 #endif 2409 #ifdef ENABLE_LE_CENTRAL 2410 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2411 hci_stack->le_whitelist_capacity = packet[6]; 2412 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2413 break; 2414 #endif 2415 #ifdef ENABLE_LE_PERIPHERAL 2416 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2417 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2418 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2419 break; 2420 #endif 2421 #endif 2422 case HCI_OPCODE_HCI_READ_BD_ADDR: 2423 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2424 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)); 2425 #ifdef ENABLE_CLASSIC 2426 if (hci_stack->link_key_db){ 2427 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2428 } 2429 #endif 2430 break; 2431 #ifdef ENABLE_CLASSIC 2432 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2433 hci_emit_discoverable_enabled(hci_stack->discoverable); 2434 break; 2435 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2436 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2437 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2438 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2439 hci_emit_event(event, sizeof(event), 1); 2440 } 2441 break; 2442 #endif 2443 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2444 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2445 2446 #ifdef ENABLE_CLASSIC 2447 // determine usable ACL packet types based on host buffer size and supported features 2448 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2449 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2450 #endif 2451 // Classic/LE 2452 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2453 break; 2454 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2455 manufacturer = little_endian_read_16(packet, 10); 2456 // map Cypress to Broadcom 2457 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2458 log_info("Treat Cypress as Broadcom"); 2459 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2460 little_endian_store_16(packet, 10, manufacturer); 2461 } 2462 hci_stack->manufacturer = manufacturer; 2463 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2464 break; 2465 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2466 hci_store_local_supported_commands(packet); 2467 break; 2468 #ifdef ENABLE_CLASSIC 2469 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2470 if (packet[5]) return; 2471 hci_stack->synchronous_flow_control_enabled = 1; 2472 break; 2473 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2474 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2475 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2476 conn = hci_connection_for_handle(handle); 2477 if (conn != NULL) { 2478 uint8_t key_size = 0; 2479 if (status == 0){ 2480 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2481 log_info("Handle %04x key Size: %u", handle, key_size); 2482 } else { 2483 key_size = 1; 2484 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2485 } 2486 hci_handle_read_encryption_key_size_complete(conn, key_size); 2487 } 2488 break; 2489 // assert pairing complete event is emitted. 2490 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2491 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2492 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2493 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2494 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2495 // lookup connection by gap pairing addr 2496 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2497 if (conn == NULL) break; 2498 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2499 break; 2500 2501 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2502 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2503 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2504 uint8_t event[67]; 2505 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2506 event[1] = 65; 2507 (void)memset(&event[2], 0, 65); 2508 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2509 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2510 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2511 event[2] = 3; 2512 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2513 } else { 2514 event[2] = 1; 2515 } 2516 } 2517 hci_emit_event(event, sizeof(event), 0); 2518 break; 2519 } 2520 2521 // note: only needed if user does not provide OOB data 2522 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2523 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2524 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2525 if (conn == NULL) break; 2526 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2527 break; 2528 #endif 2529 #endif 2530 default: 2531 break; 2532 } 2533 } 2534 2535 #ifdef ENABLE_BLE 2536 static void event_handle_le_connection_complete(const uint8_t * packet){ 2537 bd_addr_t addr; 2538 bd_addr_type_t addr_type; 2539 hci_connection_t * conn; 2540 2541 // Connection management 2542 reverse_bd_addr(&packet[8], addr); 2543 addr_type = (bd_addr_type_t)packet[7]; 2544 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2545 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2546 2547 #ifdef ENABLE_LE_CENTRAL 2548 // handle error: error is reported only to the initiator -> outgoing connection 2549 if (packet[3]){ 2550 2551 // handle cancelled outgoing connection 2552 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2553 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2554 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2555 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2556 // reset state 2557 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2558 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2559 // get outgoing connection conn struct for direct connect 2560 conn = gap_get_outgoing_connection(); 2561 } 2562 2563 // outgoing le connection establishment is done 2564 if (conn){ 2565 // remove entry 2566 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2567 btstack_memory_hci_connection_free( conn ); 2568 } 2569 return; 2570 } 2571 #endif 2572 2573 // on success, both hosts receive connection complete event 2574 if (packet[6] == HCI_ROLE_MASTER){ 2575 #ifdef ENABLE_LE_CENTRAL 2576 // if we're master on an le connection, it was an outgoing connection and we're done with it 2577 // note: no hci_connection_t object exists yet for connect with whitelist 2578 if (hci_is_le_connection_type(addr_type)){ 2579 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2580 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2581 } 2582 #endif 2583 } else { 2584 #ifdef ENABLE_LE_PERIPHERAL 2585 // if we're slave, it was an incoming connection, advertisements have stopped 2586 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2587 #endif 2588 } 2589 2590 // LE connections are auto-accepted, so just create a connection if there isn't one already 2591 if (!conn){ 2592 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2593 } 2594 2595 // no memory, sorry. 2596 if (!conn){ 2597 return; 2598 } 2599 2600 conn->state = OPEN; 2601 conn->role = packet[6]; 2602 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2603 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2604 2605 #ifdef ENABLE_LE_PERIPHERAL 2606 if (packet[6] == HCI_ROLE_SLAVE){ 2607 hci_update_advertisements_enabled_for_current_roles(); 2608 } 2609 #endif 2610 2611 // init unenhanced att bearer mtu 2612 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2613 conn->att_connection.mtu_exchanged = false; 2614 2615 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2616 2617 // restart timer 2618 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2619 // btstack_run_loop_add_timer(&conn->timeout); 2620 2621 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2622 2623 hci_emit_nr_connections_changed(); 2624 } 2625 #endif 2626 2627 #ifdef ENABLE_CLASSIC 2628 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){ 2629 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2630 // LEVEL_4 is tested by l2cap 2631 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2632 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2633 if (level >= LEVEL_3){ 2634 // MITM not possible without keyboard or display 2635 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2636 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2637 2638 // MITM possible if one side has keyboard and the other has keyboard or display 2639 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2640 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2641 2642 // MITM not possible if one side has only display and other side has no keyboard 2643 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2644 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2645 } 2646 // LEVEL 2 requires SSP, which is a given 2647 return true; 2648 } 2649 2650 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2651 uint16_t i; 2652 for (i=0; i < size ; i++){ 2653 if (data[i] != 0) { 2654 return false; 2655 } 2656 } 2657 return true; 2658 } 2659 2660 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2661 // get requested security level 2662 gap_security_level_t requested_security_level = conn->requested_security_level; 2663 if (hci_stack->gap_secure_connections_only_mode){ 2664 requested_security_level = LEVEL_4; 2665 } 2666 2667 // assess security: LEVEL 4 requires SC 2668 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2669 if ((requested_security_level == LEVEL_4) && 2670 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2671 !hci_remote_sc_enabled(conn)){ 2672 log_info("Level 4 required, but SC not supported -> abort"); 2673 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2674 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2675 return; 2676 } 2677 2678 // assess security based on io capabilities 2679 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2680 // responder: fully validate io caps of both sides as well as OOB data 2681 bool security_possible = false; 2682 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2683 2684 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2685 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2686 // so we merge the OOB data availability 2687 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2688 if (conn->classic_oob_c_192 != NULL){ 2689 have_oob_data |= 1; 2690 } 2691 if (conn->classic_oob_c_256 != NULL){ 2692 have_oob_data |= 2; 2693 } 2694 // for up to Level 3, either P-192 as well as P-256 will do 2695 // 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 2696 // if remote does not SC, we should not receive P-256 data either 2697 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2698 security_possible = true; 2699 } 2700 // for Level 4, P-256 is needed 2701 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2702 security_possible = true; 2703 } 2704 #endif 2705 2706 if (security_possible == false){ 2707 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2708 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2709 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2710 return; 2711 } 2712 } else { 2713 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2714 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2715 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2716 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2717 log_info("Level 3+ required, but no input/output -> abort"); 2718 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2719 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2720 return; 2721 } 2722 #endif 2723 #endif 2724 } 2725 2726 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2727 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2728 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2729 } else { 2730 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2731 } 2732 #endif 2733 } 2734 2735 #endif 2736 2737 static void event_handler(uint8_t *packet, uint16_t size){ 2738 2739 uint16_t event_length = packet[1]; 2740 2741 // assert packet is complete 2742 if (size != (event_length + 2u)){ 2743 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2744 return; 2745 } 2746 2747 bd_addr_type_t addr_type; 2748 hci_con_handle_t handle; 2749 hci_connection_t * conn; 2750 int i; 2751 int create_connection_cmd; 2752 2753 #ifdef ENABLE_CLASSIC 2754 hci_link_type_t link_type; 2755 bd_addr_t addr; 2756 #endif 2757 2758 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2759 2760 switch (hci_event_packet_get_type(packet)) { 2761 2762 case HCI_EVENT_COMMAND_COMPLETE: 2763 handle_command_complete_event(packet, size); 2764 break; 2765 2766 case HCI_EVENT_COMMAND_STATUS: 2767 // get num cmd packets - limit to 1 to reduce complexity 2768 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2769 2770 // check command status to detected failed outgoing connections 2771 create_connection_cmd = 0; 2772 #ifdef ENABLE_CLASSIC 2773 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2774 create_connection_cmd = 1; 2775 } 2776 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2777 create_connection_cmd = 1; 2778 } 2779 #endif 2780 #ifdef ENABLE_LE_CENTRAL 2781 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2782 create_connection_cmd = 1; 2783 } 2784 #endif 2785 if (create_connection_cmd) { 2786 uint8_t status = hci_event_command_status_get_status(packet); 2787 addr_type = hci_stack->outgoing_addr_type; 2788 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2789 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); 2790 2791 // reset outgoing address info 2792 memset(hci_stack->outgoing_addr, 0, 6); 2793 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2794 2795 // on error 2796 if (status != ERROR_CODE_SUCCESS){ 2797 #ifdef ENABLE_LE_CENTRAL 2798 if (hci_is_le_connection_type(addr_type)){ 2799 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2800 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2801 } 2802 #endif 2803 // error => outgoing connection failed 2804 if (conn != NULL){ 2805 hci_handle_connection_failed(conn, status); 2806 } 2807 } 2808 } 2809 2810 #ifdef ENABLE_CLASSIC 2811 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2812 uint8_t status = hci_event_command_status_get_status(packet); 2813 log_info("command status (inquiry), status %x", status); 2814 if (status == ERROR_CODE_SUCCESS) { 2815 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2816 } else { 2817 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2818 } 2819 } 2820 #endif 2821 break; 2822 2823 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2824 if (size < 3) return; 2825 uint16_t num_handles = packet[2]; 2826 if (size != (3u + num_handles * 4u)) return; 2827 uint16_t offset = 3; 2828 for (i=0; i<num_handles;i++){ 2829 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2830 offset += 2u; 2831 uint16_t num_packets = little_endian_read_16(packet, offset); 2832 offset += 2u; 2833 2834 conn = hci_connection_for_handle(handle); 2835 if (!conn){ 2836 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2837 continue; 2838 } 2839 2840 if (conn->num_packets_sent >= num_packets){ 2841 conn->num_packets_sent -= num_packets; 2842 } else { 2843 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2844 conn->num_packets_sent = 0; 2845 } 2846 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2847 2848 #ifdef ENABLE_CLASSIC 2849 // For SCO, we do the can_send_now_check here 2850 hci_notify_if_sco_can_send_now(); 2851 #endif 2852 } 2853 break; 2854 } 2855 2856 #ifdef ENABLE_CLASSIC 2857 case HCI_EVENT_INQUIRY_COMPLETE: 2858 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2859 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2860 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2861 hci_emit_event(event, sizeof(event), 1); 2862 } 2863 break; 2864 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2865 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2866 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2867 } 2868 break; 2869 case HCI_EVENT_CONNECTION_REQUEST: 2870 reverse_bd_addr(&packet[2], addr); 2871 link_type = (hci_link_type_t) packet[11]; 2872 2873 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2874 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2875 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2876 bd_addr_copy(hci_stack->decline_addr, addr); 2877 break; 2878 } 2879 2880 if (hci_stack->gap_classic_accept_callback != NULL){ 2881 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2882 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2883 bd_addr_copy(hci_stack->decline_addr, addr); 2884 break; 2885 } 2886 } 2887 2888 // TODO: eval COD 8-10 2889 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2890 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2891 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2892 if (!conn) { 2893 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2894 } 2895 if (!conn) { 2896 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2897 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2898 bd_addr_copy(hci_stack->decline_addr, addr); 2899 hci_run(); 2900 // avoid event to higher layer 2901 return; 2902 } 2903 conn->role = HCI_ROLE_SLAVE; 2904 conn->state = RECEIVED_CONNECTION_REQUEST; 2905 // store info about eSCO 2906 if (link_type == HCI_LINK_TYPE_ESCO){ 2907 conn->remote_supported_features[0] |= 1; 2908 } 2909 hci_run(); 2910 break; 2911 2912 case HCI_EVENT_CONNECTION_COMPLETE: 2913 // Connection management 2914 reverse_bd_addr(&packet[5], addr); 2915 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2916 addr_type = BD_ADDR_TYPE_ACL; 2917 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2918 if (conn) { 2919 if (!packet[2]){ 2920 conn->state = OPEN; 2921 conn->con_handle = little_endian_read_16(packet, 3); 2922 2923 // queue set supervision timeout if we're master 2924 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2925 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2926 } 2927 2928 // restart timer 2929 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2930 btstack_run_loop_add_timer(&conn->timeout); 2931 2932 // trigger remote features for dedicated bonding 2933 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2934 hci_trigger_remote_features_for_connection(conn); 2935 } 2936 2937 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2938 2939 hci_emit_nr_connections_changed(); 2940 } else { 2941 // connection failed 2942 hci_handle_connection_failed(conn, packet[2]); 2943 } 2944 } 2945 break; 2946 2947 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2948 reverse_bd_addr(&packet[5], addr); 2949 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2950 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2951 if (packet[2]){ 2952 // connection failed 2953 if (conn){ 2954 hci_handle_connection_failed(conn, packet[2]); 2955 } 2956 break; 2957 } 2958 if (!conn) { 2959 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2960 } 2961 if (!conn) { 2962 break; 2963 } 2964 conn->state = OPEN; 2965 conn->con_handle = little_endian_read_16(packet, 3); 2966 2967 #ifdef ENABLE_SCO_OVER_HCI 2968 // update SCO 2969 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2970 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2971 } 2972 // trigger can send now 2973 if (hci_have_usb_transport()){ 2974 hci_stack->sco_can_send_now = true; 2975 } 2976 #endif 2977 #ifdef HAVE_SCO_TRANSPORT 2978 // configure sco transport 2979 if (hci_stack->sco_transport != NULL){ 2980 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2981 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2982 } 2983 #endif 2984 break; 2985 2986 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2987 handle = little_endian_read_16(packet, 3); 2988 conn = hci_connection_for_handle(handle); 2989 if (!conn) break; 2990 if (!packet[2]){ 2991 const uint8_t * features = &packet[5]; 2992 hci_handle_remote_features_page_0(conn, features); 2993 2994 // read extended features if possible 2995 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 2996 && ((conn->remote_supported_features[0] & 2) != 0)) { 2997 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2998 break; 2999 } 3000 } 3001 hci_handle_remote_features_received(conn); 3002 break; 3003 3004 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3005 handle = little_endian_read_16(packet, 3); 3006 conn = hci_connection_for_handle(handle); 3007 if (!conn) break; 3008 // status = ok, page = 1 3009 if (!packet[2]) { 3010 uint8_t page_number = packet[5]; 3011 uint8_t maximum_page_number = packet[6]; 3012 const uint8_t * features = &packet[7]; 3013 bool done = false; 3014 switch (page_number){ 3015 case 1: 3016 hci_handle_remote_features_page_1(conn, features); 3017 if (maximum_page_number >= 2){ 3018 // get Secure Connections (Controller) from Page 2 if available 3019 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3020 } else { 3021 // otherwise, assume SC (Controller) == SC (Host) 3022 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3023 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3024 } 3025 done = true; 3026 } 3027 break; 3028 case 2: 3029 hci_handle_remote_features_page_2(conn, features); 3030 done = true; 3031 break; 3032 default: 3033 break; 3034 } 3035 if (!done) break; 3036 } 3037 hci_handle_remote_features_received(conn); 3038 break; 3039 3040 case HCI_EVENT_LINK_KEY_REQUEST: 3041 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3042 hci_event_link_key_request_get_bd_addr(packet, addr); 3043 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3044 if (!conn) break; 3045 3046 // lookup link key in db if not cached 3047 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3048 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3049 } 3050 3051 // response sent by hci_run() 3052 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3053 #endif 3054 break; 3055 3056 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3057 hci_event_link_key_request_get_bd_addr(packet, addr); 3058 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3059 if (!conn) break; 3060 3061 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3062 3063 // CVE-2020-26555: ignore NULL link key 3064 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3065 if (btstack_is_null(&packet[8], 16)) break; 3066 3067 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3068 // Change Connection Encryption keeps link key type 3069 if (link_key_type != CHANGED_COMBINATION_KEY){ 3070 conn->link_key_type = link_key_type; 3071 } 3072 3073 // cache link key. link keys stored in little-endian format for legacy reasons 3074 memcpy(&conn->link_key, &packet[8], 16); 3075 3076 // only store link key: 3077 // - if bondable enabled 3078 if (hci_stack->bondable == false) break; 3079 // - if security level sufficient 3080 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3081 // - for SSP, also check if remote side requested bonding as well 3082 if (conn->link_key_type != COMBINATION_KEY){ 3083 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3084 if (!remote_bonding){ 3085 break; 3086 } 3087 } 3088 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3089 break; 3090 } 3091 3092 case HCI_EVENT_PIN_CODE_REQUEST: 3093 hci_event_pin_code_request_get_bd_addr(packet, addr); 3094 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3095 if (!conn) break; 3096 3097 hci_pairing_started(conn, false); 3098 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3099 if (!hci_stack->bondable ){ 3100 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3101 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3102 hci_run(); 3103 return; 3104 } 3105 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3106 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3107 log_info("Level 4 required, but SC not supported -> abort"); 3108 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3109 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3110 hci_run(); 3111 return; 3112 } 3113 break; 3114 3115 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3116 hci_event_io_capability_response_get_bd_addr(packet, addr); 3117 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3118 if (!conn) break; 3119 3120 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3121 hci_pairing_started(conn, true); 3122 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3123 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3124 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3125 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3126 #endif 3127 break; 3128 3129 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3130 hci_event_io_capability_response_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 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3135 hci_connection_timestamp(conn); 3136 hci_pairing_started(conn, true); 3137 break; 3138 3139 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3140 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3141 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3142 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3143 if (!conn) break; 3144 3145 hci_connection_timestamp(conn); 3146 3147 hci_pairing_started(conn, true); 3148 3149 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3150 break; 3151 #endif 3152 3153 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3154 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3155 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3156 if (!conn) break; 3157 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3158 if (hci_stack->ssp_auto_accept){ 3159 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3160 }; 3161 } else { 3162 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3163 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3164 // don't forward event to app 3165 hci_run(); 3166 return; 3167 } 3168 break; 3169 3170 case HCI_EVENT_USER_PASSKEY_REQUEST: 3171 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3172 if (hci_stack->ssp_auto_accept){ 3173 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3174 }; 3175 break; 3176 3177 case HCI_EVENT_MODE_CHANGE: 3178 handle = hci_event_mode_change_get_handle(packet); 3179 conn = hci_connection_for_handle(handle); 3180 if (!conn) break; 3181 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3182 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3183 break; 3184 #endif 3185 3186 case HCI_EVENT_ENCRYPTION_CHANGE: 3187 handle = hci_event_encryption_change_get_connection_handle(packet); 3188 conn = hci_connection_for_handle(handle); 3189 if (!conn) break; 3190 if (hci_event_encryption_change_get_status(packet) == 0u) { 3191 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3192 if (encryption_enabled){ 3193 if (hci_is_le_connection(conn)){ 3194 // For LE, we accept connection as encrypted 3195 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3196 } 3197 #ifdef ENABLE_CLASSIC 3198 else { 3199 3200 // dedicated bonding: send result and disconnect 3201 if (conn->bonding_flags & BONDING_DEDICATED){ 3202 conn->bonding_flags &= ~BONDING_DEDICATED; 3203 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3204 conn->bonding_status = packet[2]; 3205 break; 3206 } 3207 3208 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3209 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3210 bool connected_uses_aes_ccm = encryption_enabled == 2; 3211 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3212 log_info("SC during pairing, but only E0 now -> abort"); 3213 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3214 break; 3215 } 3216 3217 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3218 if (connected_uses_aes_ccm){ 3219 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3220 } 3221 3222 #ifdef ENABLE_TESTING_SUPPORT 3223 // work around for issue with PTS dongle 3224 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3225 #endif 3226 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3227 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3228 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3229 } else { 3230 // if not, pretend everything is perfect 3231 hci_handle_read_encryption_key_size_complete(conn, 16); 3232 } 3233 } 3234 #endif 3235 } else { 3236 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3237 } 3238 } 3239 3240 break; 3241 3242 #ifdef ENABLE_CLASSIC 3243 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3244 handle = hci_event_authentication_complete_get_connection_handle(packet); 3245 conn = hci_connection_for_handle(handle); 3246 if (!conn) break; 3247 3248 // clear authentication active flag 3249 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3250 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3251 3252 // authenticated only if auth status == 0 3253 if (hci_event_authentication_complete_get_status(packet) == 0){ 3254 // authenticated 3255 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3256 3257 // If not already encrypted, start encryption 3258 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3259 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3260 break; 3261 } 3262 } 3263 3264 // emit updated security level 3265 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3266 break; 3267 3268 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3269 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3270 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3271 if (!conn) break; 3272 3273 // treat successfully paired connection as authenticated 3274 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3275 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3276 } 3277 3278 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3279 break; 3280 #endif 3281 3282 // HCI_EVENT_DISCONNECTION_COMPLETE 3283 // has been split, to first notify stack before shutting connection down 3284 // see end of function, too. 3285 case HCI_EVENT_DISCONNECTION_COMPLETE: 3286 if (packet[2]) break; // status != 0 3287 handle = little_endian_read_16(packet, 3); 3288 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3289 if (hci_stack->acl_fragmentation_total_size > 0u) { 3290 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3291 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3292 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3293 hci_stack->acl_fragmentation_total_size = 0; 3294 hci_stack->acl_fragmentation_pos = 0; 3295 if (release_buffer){ 3296 hci_release_packet_buffer(); 3297 } 3298 } 3299 } 3300 3301 conn = hci_connection_for_handle(handle); 3302 if (!conn) break; 3303 #ifdef ENABLE_CLASSIC 3304 // pairing failed if it was ongoing 3305 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3306 #endif 3307 3308 // emit dedicatd bonding event 3309 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3310 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3311 } 3312 3313 // mark connection for shutdown, stop timers, reset state 3314 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3315 hci_connection_stop_timer(conn); 3316 hci_connection_init(conn); 3317 3318 #ifdef ENABLE_BLE 3319 #ifdef ENABLE_LE_PERIPHERAL 3320 // re-enable advertisements for le connections if active 3321 if (hci_is_le_connection(conn)){ 3322 hci_update_advertisements_enabled_for_current_roles(); 3323 } 3324 #endif 3325 #endif 3326 break; 3327 3328 case HCI_EVENT_HARDWARE_ERROR: 3329 log_error("Hardware Error: 0x%02x", packet[2]); 3330 if (hci_stack->hardware_error_callback){ 3331 (*hci_stack->hardware_error_callback)(packet[2]); 3332 } else { 3333 // if no special requests, just reboot stack 3334 hci_power_control_off(); 3335 hci_power_control_on(); 3336 } 3337 break; 3338 3339 #ifdef ENABLE_CLASSIC 3340 case HCI_EVENT_ROLE_CHANGE: 3341 if (packet[2]) break; // status != 0 3342 reverse_bd_addr(&packet[3], addr); 3343 addr_type = BD_ADDR_TYPE_ACL; 3344 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3345 if (!conn) break; 3346 conn->role = packet[9]; 3347 break; 3348 #endif 3349 3350 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3351 // release packet buffer only for asynchronous transport and if there are not further fragements 3352 if (hci_transport_synchronous()) { 3353 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3354 return; // instead of break: to avoid re-entering hci_run() 3355 } 3356 hci_stack->acl_fragmentation_tx_active = 0; 3357 if (hci_stack->acl_fragmentation_total_size) break; 3358 hci_release_packet_buffer(); 3359 3360 // L2CAP receives this event via the hci_emit_event below 3361 3362 #ifdef ENABLE_CLASSIC 3363 // For SCO, we do the can_send_now_check here 3364 hci_notify_if_sco_can_send_now(); 3365 #endif 3366 break; 3367 3368 #ifdef ENABLE_CLASSIC 3369 case HCI_EVENT_SCO_CAN_SEND_NOW: 3370 // For SCO, we do the can_send_now_check here 3371 hci_stack->sco_can_send_now = true; 3372 hci_notify_if_sco_can_send_now(); 3373 return; 3374 3375 // explode inquriy results for easier consumption 3376 case HCI_EVENT_INQUIRY_RESULT: 3377 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3378 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3379 gap_inquiry_explode(packet, size); 3380 break; 3381 #endif 3382 3383 #ifdef ENABLE_BLE 3384 case HCI_EVENT_LE_META: 3385 switch (packet[2]){ 3386 #ifdef ENABLE_LE_CENTRAL 3387 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3388 if (!hci_stack->le_scanning_enabled) break; 3389 le_handle_advertisement_report(packet, size); 3390 break; 3391 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3392 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3393 if (!hci_stack->le_scanning_enabled) break; 3394 le_handle_extended_advertisement_report(packet, size); 3395 break; 3396 #endif 3397 #endif 3398 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3399 event_handle_le_connection_complete(packet); 3400 break; 3401 3402 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3403 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3404 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3405 conn = hci_connection_for_handle(handle); 3406 if (!conn) break; 3407 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3408 break; 3409 3410 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3411 // connection 3412 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3413 conn = hci_connection_for_handle(handle); 3414 if (conn) { 3415 // read arguments 3416 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3417 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3418 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3419 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3420 3421 // validate against current connection parameter range 3422 le_connection_parameter_range_t existing_range; 3423 gap_get_connection_parameter_range(&existing_range); 3424 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3425 if (update_parameter){ 3426 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3427 conn->le_conn_interval_min = le_conn_interval_min; 3428 conn->le_conn_interval_max = le_conn_interval_max; 3429 conn->le_conn_latency = le_conn_latency; 3430 conn->le_supervision_timeout = le_supervision_timeout; 3431 } else { 3432 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3433 } 3434 } 3435 break; 3436 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3437 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3438 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3439 conn = hci_connection_for_handle(handle); 3440 if (conn) { 3441 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3442 } 3443 break; 3444 #endif 3445 default: 3446 break; 3447 } 3448 break; 3449 #endif 3450 case HCI_EVENT_VENDOR_SPECIFIC: 3451 // Vendor specific commands often create vendor specific event instead of num completed packets 3452 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3453 switch (hci_stack->manufacturer){ 3454 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3455 hci_stack->num_cmd_packets = 1; 3456 break; 3457 default: 3458 break; 3459 } 3460 break; 3461 default: 3462 break; 3463 } 3464 3465 handle_event_for_current_stack_state(packet, size); 3466 3467 // notify upper stack 3468 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3469 3470 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3471 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3472 handle = little_endian_read_16(packet, 3); 3473 hci_connection_t * aConn = hci_connection_for_handle(handle); 3474 // discard connection if app did not trigger a reconnect in the event handler 3475 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3476 hci_shutdown_connection(aConn); 3477 } 3478 } 3479 3480 // execute main loop 3481 hci_run(); 3482 } 3483 3484 #ifdef ENABLE_CLASSIC 3485 3486 #ifdef ENABLE_SCO_OVER_HCI 3487 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3488 static void sco_schedule_tx(hci_connection_t * conn); 3489 3490 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3491 log_debug("SCO TX Timeout"); 3492 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3493 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3494 if (!conn) return; 3495 3496 // trigger send 3497 conn->sco_tx_ready = 1; 3498 // extra packet if CVSD but SCO buffer is too short 3499 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3500 conn->sco_tx_ready++; 3501 } 3502 hci_notify_if_sco_can_send_now(); 3503 } 3504 3505 3506 #define SCO_TX_AFTER_RX_MS (6) 3507 3508 static void sco_schedule_tx(hci_connection_t * conn){ 3509 3510 uint32_t now = btstack_run_loop_get_time_ms(); 3511 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3512 int time_delta_ms = sco_tx_ms - now; 3513 3514 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3515 3516 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3517 btstack_run_loop_remove_timer(timer); 3518 btstack_run_loop_set_timer(timer, time_delta_ms); 3519 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3520 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3521 btstack_run_loop_add_timer(timer); 3522 } 3523 #endif 3524 3525 static void sco_handler(uint8_t * packet, uint16_t size){ 3526 // lookup connection struct 3527 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3528 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3529 if (!conn) return; 3530 3531 #ifdef ENABLE_SCO_OVER_HCI 3532 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3533 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3534 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3535 packet[2] = 0x3c; 3536 memmove(&packet[3], &packet[23], 63); 3537 size = 63; 3538 } 3539 } 3540 3541 if (hci_have_usb_transport()){ 3542 // Nothing to do 3543 } else { 3544 // 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); 3545 if (hci_stack->synchronous_flow_control_enabled == 0){ 3546 uint32_t now = btstack_run_loop_get_time_ms(); 3547 3548 if (!conn->sco_rx_valid){ 3549 // ignore first 10 packets 3550 conn->sco_rx_count++; 3551 // log_debug("sco rx count %u", conn->sco_rx_count); 3552 if (conn->sco_rx_count == 10) { 3553 // use first timestamp as is and pretent it just started 3554 conn->sco_rx_ms = now; 3555 conn->sco_rx_valid = 1; 3556 conn->sco_rx_count = 0; 3557 sco_schedule_tx(conn); 3558 } 3559 } else { 3560 // track expected arrival timme 3561 conn->sco_rx_count++; 3562 conn->sco_rx_ms += 7; 3563 int delta = (int32_t) (now - conn->sco_rx_ms); 3564 if (delta > 0){ 3565 conn->sco_rx_ms++; 3566 } 3567 // log_debug("sco rx %u", conn->sco_rx_ms); 3568 sco_schedule_tx(conn); 3569 } 3570 } 3571 } 3572 #endif 3573 3574 // deliver to app 3575 if (hci_stack->sco_packet_handler) { 3576 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3577 } 3578 3579 #ifdef HAVE_SCO_TRANSPORT 3580 // We can send one packet for each received packet 3581 conn->sco_tx_ready++; 3582 hci_notify_if_sco_can_send_now(); 3583 #endif 3584 3585 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3586 conn->num_packets_completed++; 3587 hci_stack->host_completed_packets = 1; 3588 hci_run(); 3589 #endif 3590 } 3591 #endif 3592 3593 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3594 hci_dump_packet(packet_type, 1, packet, size); 3595 switch (packet_type) { 3596 case HCI_EVENT_PACKET: 3597 event_handler(packet, size); 3598 break; 3599 case HCI_ACL_DATA_PACKET: 3600 acl_handler(packet, size); 3601 break; 3602 #ifdef ENABLE_CLASSIC 3603 case HCI_SCO_DATA_PACKET: 3604 sco_handler(packet, size); 3605 break; 3606 #endif 3607 default: 3608 break; 3609 } 3610 } 3611 3612 /** 3613 * @brief Add event packet handler. 3614 */ 3615 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3616 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3617 } 3618 3619 /** 3620 * @brief Remove event packet handler. 3621 */ 3622 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3623 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3624 } 3625 3626 /** Register HCI packet handlers */ 3627 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3628 hci_stack->acl_packet_handler = handler; 3629 } 3630 3631 #ifdef ENABLE_CLASSIC 3632 /** 3633 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3634 */ 3635 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3636 hci_stack->sco_packet_handler = handler; 3637 } 3638 #endif 3639 3640 static void hci_state_reset(void){ 3641 // no connections yet 3642 hci_stack->connections = NULL; 3643 3644 // keep discoverable/connectable as this has been requested by the client(s) 3645 // hci_stack->discoverable = 0; 3646 // hci_stack->connectable = 0; 3647 // hci_stack->bondable = 1; 3648 // hci_stack->own_addr_type = 0; 3649 3650 // buffer is free 3651 hci_stack->hci_packet_buffer_reserved = false; 3652 3653 // no pending cmds 3654 hci_stack->decline_reason = 0; 3655 3656 hci_stack->secure_connections_active = false; 3657 3658 #ifdef ENABLE_CLASSIC 3659 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3660 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3661 3662 hci_stack->gap_tasks_classic = 3663 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3664 GAP_TASK_SET_CLASS_OF_DEVICE | 3665 GAP_TASK_SET_LOCAL_NAME | 3666 GAP_TASK_SET_EIR_DATA | 3667 GAP_TASK_WRITE_SCAN_ENABLE | 3668 GAP_TASK_WRITE_PAGE_TIMEOUT; 3669 #endif 3670 3671 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3672 hci_stack->classic_read_local_oob_data = false; 3673 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3674 #endif 3675 3676 // LE 3677 #ifdef ENABLE_BLE 3678 memset(hci_stack->le_random_address, 0, 6); 3679 hci_stack->le_random_address_set = 0; 3680 #endif 3681 #ifdef ENABLE_LE_CENTRAL 3682 hci_stack->le_scanning_active = false; 3683 hci_stack->le_scanning_param_update = true; 3684 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3685 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3686 hci_stack->le_whitelist_capacity = 0; 3687 #endif 3688 #ifdef ENABLE_LE_PERIPHERAL 3689 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3690 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3691 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3692 } 3693 if (hci_stack->le_advertisements_data != NULL){ 3694 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3695 } 3696 #endif 3697 } 3698 3699 #ifdef ENABLE_CLASSIC 3700 /** 3701 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3702 */ 3703 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3704 // store and open remote device db 3705 hci_stack->link_key_db = link_key_db; 3706 if (hci_stack->link_key_db) { 3707 hci_stack->link_key_db->open(); 3708 } 3709 } 3710 #endif 3711 3712 void hci_init(const hci_transport_t *transport, const void *config){ 3713 3714 #ifdef HAVE_MALLOC 3715 if (!hci_stack) { 3716 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3717 } 3718 #else 3719 hci_stack = &hci_stack_static; 3720 #endif 3721 memset(hci_stack, 0, sizeof(hci_stack_t)); 3722 3723 // reference to use transport layer implementation 3724 hci_stack->hci_transport = transport; 3725 3726 // reference to used config 3727 hci_stack->config = config; 3728 3729 // setup pointer for outgoing packet buffer 3730 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3731 3732 // max acl payload size defined in config.h 3733 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3734 3735 // register packet handlers with transport 3736 transport->register_packet_handler(&packet_handler); 3737 3738 hci_stack->state = HCI_STATE_OFF; 3739 3740 // class of device 3741 hci_stack->class_of_device = 0x007a020c; // Smartphone 3742 3743 // bondable by default 3744 hci_stack->bondable = 1; 3745 3746 #ifdef ENABLE_CLASSIC 3747 // classic name 3748 hci_stack->local_name = default_classic_name; 3749 3750 // Master slave policy 3751 hci_stack->master_slave_policy = 1; 3752 3753 // Allow Role Switch 3754 hci_stack->allow_role_switch = 1; 3755 3756 // Default / minimum security level = 2 3757 hci_stack->gap_security_level = LEVEL_2; 3758 3759 // Default Security Mode 4 3760 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3761 3762 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3763 hci_stack->gap_required_encyrption_key_size = 7; 3764 3765 // Link Supervision Timeout 3766 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3767 3768 #endif 3769 3770 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3771 hci_stack->ssp_enable = 1; 3772 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3773 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3774 hci_stack->ssp_auto_accept = 1; 3775 3776 // Secure Connections: enable (requires support from Controller) 3777 hci_stack->secure_connections_enable = true; 3778 3779 // voice setting - signed 16 bit pcm data with CVSD over the air 3780 hci_stack->sco_voice_setting = 0x60; 3781 3782 #ifdef ENABLE_LE_CENTRAL 3783 // connection parameter to use for outgoing connections 3784 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3785 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3786 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3787 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3788 hci_stack->le_connection_latency = 4; // 4 3789 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3790 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3791 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3792 3793 // default LE Scanning 3794 hci_stack->le_scan_type = 0x1; // active 3795 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3796 hci_stack->le_scan_window = 0x30; // 30 ms 3797 #endif 3798 3799 #ifdef ENABLE_LE_PERIPHERAL 3800 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3801 #endif 3802 3803 // connection parameter range used to answer connection parameter update requests in l2cap 3804 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3805 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3806 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3807 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3808 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3809 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3810 3811 hci_state_reset(); 3812 } 3813 3814 void hci_deinit(void){ 3815 #ifdef HAVE_MALLOC 3816 if (hci_stack) { 3817 free(hci_stack); 3818 } 3819 #endif 3820 hci_stack = NULL; 3821 3822 #ifdef ENABLE_CLASSIC 3823 disable_l2cap_timeouts = 0; 3824 #endif 3825 } 3826 3827 /** 3828 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3829 */ 3830 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3831 hci_stack->chipset = chipset_driver; 3832 3833 // reset chipset driver - init is also called on power_up 3834 if (hci_stack->chipset && hci_stack->chipset->init){ 3835 hci_stack->chipset->init(hci_stack->config); 3836 } 3837 } 3838 3839 /** 3840 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3841 */ 3842 void hci_set_control(const btstack_control_t *hardware_control){ 3843 // references to used control implementation 3844 hci_stack->control = hardware_control; 3845 // init with transport config 3846 hardware_control->init(hci_stack->config); 3847 } 3848 3849 static void hci_discard_connections(void){ 3850 btstack_linked_list_iterator_t lit; 3851 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3852 while (btstack_linked_list_iterator_has_next(&lit)){ 3853 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3854 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3855 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3856 hci_shutdown_connection(connection); 3857 } 3858 } 3859 3860 void hci_close(void){ 3861 3862 #ifdef ENABLE_CLASSIC 3863 // close remote device db 3864 if (hci_stack->link_key_db) { 3865 hci_stack->link_key_db->close(); 3866 } 3867 #endif 3868 3869 hci_discard_connections(); 3870 3871 hci_power_control(HCI_POWER_OFF); 3872 3873 #ifdef HAVE_MALLOC 3874 free(hci_stack); 3875 #endif 3876 hci_stack = NULL; 3877 } 3878 3879 #ifdef HAVE_SCO_TRANSPORT 3880 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3881 hci_stack->sco_transport = sco_transport; 3882 sco_transport->register_packet_handler(&packet_handler); 3883 } 3884 #endif 3885 3886 #ifdef ENABLE_CLASSIC 3887 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3888 // validate ranage and set 3889 if (encryption_key_size < 7) return; 3890 if (encryption_key_size > 16) return; 3891 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3892 } 3893 3894 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3895 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3896 hci_stack->gap_security_mode = security_mode; 3897 return ERROR_CODE_SUCCESS; 3898 } else { 3899 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3900 } 3901 } 3902 3903 gap_security_mode_t gap_get_security_mode(void){ 3904 return hci_stack->gap_security_mode; 3905 } 3906 3907 void gap_set_security_level(gap_security_level_t security_level){ 3908 hci_stack->gap_security_level = security_level; 3909 } 3910 3911 gap_security_level_t gap_get_security_level(void){ 3912 if (hci_stack->gap_secure_connections_only_mode){ 3913 return LEVEL_4; 3914 } 3915 return hci_stack->gap_security_level; 3916 } 3917 3918 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3919 hci_stack->gap_minimal_service_security_level = security_level; 3920 } 3921 3922 void gap_set_secure_connections_only_mode(bool enable){ 3923 hci_stack->gap_secure_connections_only_mode = enable; 3924 } 3925 3926 bool gap_get_secure_connections_only_mode(void){ 3927 return hci_stack->gap_secure_connections_only_mode; 3928 } 3929 #endif 3930 3931 #ifdef ENABLE_CLASSIC 3932 void gap_set_class_of_device(uint32_t class_of_device){ 3933 hci_stack->class_of_device = class_of_device; 3934 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3935 hci_run(); 3936 } 3937 3938 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3939 hci_stack->default_link_policy_settings = default_link_policy_settings; 3940 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3941 hci_run(); 3942 } 3943 3944 void gap_set_allow_role_switch(bool allow_role_switch){ 3945 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3946 } 3947 3948 uint8_t hci_get_allow_role_switch(void){ 3949 return hci_stack->allow_role_switch; 3950 } 3951 3952 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3953 hci_stack->link_supervision_timeout = link_supervision_timeout; 3954 } 3955 3956 void hci_disable_l2cap_timeout_check(void){ 3957 disable_l2cap_timeouts = 1; 3958 } 3959 #endif 3960 3961 #ifndef HAVE_HOST_CONTROLLER_API 3962 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3963 void hci_set_bd_addr(bd_addr_t addr){ 3964 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3965 hci_stack->custom_bd_addr_set = 1; 3966 } 3967 #endif 3968 3969 // State-Module-Driver overview 3970 // state module low-level 3971 // HCI_STATE_OFF off close 3972 // HCI_STATE_INITIALIZING, on open 3973 // HCI_STATE_WORKING, on open 3974 // HCI_STATE_HALTING, on open 3975 // HCI_STATE_SLEEPING, off/sleep close 3976 // HCI_STATE_FALLING_ASLEEP on open 3977 3978 static int hci_power_control_on(void){ 3979 3980 // power on 3981 int err = 0; 3982 if (hci_stack->control && hci_stack->control->on){ 3983 err = (*hci_stack->control->on)(); 3984 } 3985 if (err){ 3986 log_error( "POWER_ON failed"); 3987 hci_emit_hci_open_failed(); 3988 return err; 3989 } 3990 3991 // int chipset driver 3992 if (hci_stack->chipset && hci_stack->chipset->init){ 3993 hci_stack->chipset->init(hci_stack->config); 3994 } 3995 3996 // init transport 3997 if (hci_stack->hci_transport->init){ 3998 hci_stack->hci_transport->init(hci_stack->config); 3999 } 4000 4001 // open transport 4002 err = hci_stack->hci_transport->open(); 4003 if (err){ 4004 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4005 if (hci_stack->control && hci_stack->control->off){ 4006 (*hci_stack->control->off)(); 4007 } 4008 hci_emit_hci_open_failed(); 4009 return err; 4010 } 4011 return 0; 4012 } 4013 4014 static void hci_power_control_off(void){ 4015 4016 log_info("hci_power_control_off"); 4017 4018 // close low-level device 4019 hci_stack->hci_transport->close(); 4020 4021 log_info("hci_power_control_off - hci_transport closed"); 4022 4023 // power off 4024 if (hci_stack->control && hci_stack->control->off){ 4025 (*hci_stack->control->off)(); 4026 } 4027 4028 log_info("hci_power_control_off - control closed"); 4029 4030 hci_stack->state = HCI_STATE_OFF; 4031 } 4032 4033 static void hci_power_control_sleep(void){ 4034 4035 log_info("hci_power_control_sleep"); 4036 4037 #if 0 4038 // don't close serial port during sleep 4039 4040 // close low-level device 4041 hci_stack->hci_transport->close(hci_stack->config); 4042 #endif 4043 4044 // sleep mode 4045 if (hci_stack->control && hci_stack->control->sleep){ 4046 (*hci_stack->control->sleep)(); 4047 } 4048 4049 hci_stack->state = HCI_STATE_SLEEPING; 4050 } 4051 4052 static int hci_power_control_wake(void){ 4053 4054 log_info("hci_power_control_wake"); 4055 4056 // wake on 4057 if (hci_stack->control && hci_stack->control->wake){ 4058 (*hci_stack->control->wake)(); 4059 } 4060 4061 #if 0 4062 // open low-level device 4063 int err = hci_stack->hci_transport->open(hci_stack->config); 4064 if (err){ 4065 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4066 if (hci_stack->control && hci_stack->control->off){ 4067 (*hci_stack->control->off)(); 4068 } 4069 hci_emit_hci_open_failed(); 4070 return err; 4071 } 4072 #endif 4073 4074 return 0; 4075 } 4076 4077 static void hci_power_transition_to_initializing(void){ 4078 // set up state machine 4079 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4080 hci_stack->hci_packet_buffer_reserved = false; 4081 hci_stack->state = HCI_STATE_INITIALIZING; 4082 hci_stack->substate = HCI_INIT_SEND_RESET; 4083 } 4084 4085 // returns error 4086 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4087 int err; 4088 switch (power_mode){ 4089 case HCI_POWER_ON: 4090 err = hci_power_control_on(); 4091 if (err != 0) { 4092 log_error("hci_power_control_on() error %d", err); 4093 return err; 4094 } 4095 hci_power_transition_to_initializing(); 4096 break; 4097 case HCI_POWER_OFF: 4098 // do nothing 4099 break; 4100 case HCI_POWER_SLEEP: 4101 // do nothing (with SLEEP == OFF) 4102 break; 4103 default: 4104 btstack_assert(false); 4105 break; 4106 } 4107 return ERROR_CODE_SUCCESS; 4108 } 4109 4110 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4111 switch (power_mode){ 4112 case HCI_POWER_ON: 4113 // do nothing 4114 break; 4115 case HCI_POWER_OFF: 4116 // no connections yet, just turn it off 4117 hci_power_control_off(); 4118 break; 4119 case HCI_POWER_SLEEP: 4120 // no connections yet, just turn it off 4121 hci_power_control_sleep(); 4122 break; 4123 default: 4124 btstack_assert(false); 4125 break; 4126 } 4127 return ERROR_CODE_SUCCESS; 4128 } 4129 4130 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4131 switch (power_mode){ 4132 case HCI_POWER_ON: 4133 // do nothing 4134 break; 4135 case HCI_POWER_OFF: 4136 // see hci_run 4137 hci_stack->state = HCI_STATE_HALTING; 4138 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4139 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4140 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4141 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4142 btstack_run_loop_add_timer(&hci_stack->timeout); 4143 break; 4144 case HCI_POWER_SLEEP: 4145 // see hci_run 4146 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4147 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4148 break; 4149 default: 4150 btstack_assert(false); 4151 break; 4152 } 4153 return ERROR_CODE_SUCCESS; 4154 } 4155 4156 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4157 switch (power_mode){ 4158 case HCI_POWER_ON: 4159 hci_power_transition_to_initializing(); 4160 break; 4161 case HCI_POWER_OFF: 4162 // do nothing 4163 break; 4164 case HCI_POWER_SLEEP: 4165 // see hci_run 4166 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4167 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4168 break; 4169 default: 4170 btstack_assert(false); 4171 break; 4172 } 4173 return ERROR_CODE_SUCCESS; 4174 } 4175 4176 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4177 switch (power_mode){ 4178 case HCI_POWER_ON: 4179 hci_power_transition_to_initializing(); 4180 break; 4181 case HCI_POWER_OFF: 4182 // see hci_run 4183 hci_stack->state = HCI_STATE_HALTING; 4184 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4185 break; 4186 case HCI_POWER_SLEEP: 4187 // do nothing 4188 break; 4189 default: 4190 btstack_assert(false); 4191 break; 4192 } 4193 return ERROR_CODE_SUCCESS; 4194 } 4195 4196 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4197 int err; 4198 switch (power_mode){ 4199 case HCI_POWER_ON: 4200 err = hci_power_control_wake(); 4201 if (err) return err; 4202 hci_power_transition_to_initializing(); 4203 break; 4204 case HCI_POWER_OFF: 4205 hci_stack->state = HCI_STATE_HALTING; 4206 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4207 break; 4208 case HCI_POWER_SLEEP: 4209 // do nothing 4210 break; 4211 default: 4212 btstack_assert(false); 4213 break; 4214 } 4215 return ERROR_CODE_SUCCESS; 4216 } 4217 4218 int hci_power_control(HCI_POWER_MODE power_mode){ 4219 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4220 int err = 0; 4221 switch (hci_stack->state){ 4222 case HCI_STATE_OFF: 4223 err = hci_power_control_state_off(power_mode); 4224 break; 4225 case HCI_STATE_INITIALIZING: 4226 err = hci_power_control_state_initializing(power_mode); 4227 break; 4228 case HCI_STATE_WORKING: 4229 err = hci_power_control_state_working(power_mode); 4230 break; 4231 case HCI_STATE_HALTING: 4232 err = hci_power_control_state_halting(power_mode); 4233 break; 4234 case HCI_STATE_FALLING_ASLEEP: 4235 err = hci_power_control_state_falling_asleep(power_mode); 4236 break; 4237 case HCI_STATE_SLEEPING: 4238 err = hci_power_control_state_sleeping(power_mode); 4239 break; 4240 default: 4241 btstack_assert(false); 4242 break; 4243 } 4244 if (err != 0){ 4245 return err; 4246 } 4247 4248 // create internal event 4249 hci_emit_state(); 4250 4251 // trigger next/first action 4252 hci_run(); 4253 4254 return 0; 4255 } 4256 4257 4258 static void hci_halting_run(void) { 4259 4260 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4261 4262 hci_connection_t *connection; 4263 4264 switch (hci_stack->substate) { 4265 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4266 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4267 4268 #ifdef ENABLE_BLE 4269 #ifdef ENABLE_LE_CENTRAL 4270 hci_whitelist_free(); 4271 #endif 4272 #endif 4273 // close all open connections 4274 connection = (hci_connection_t *) hci_stack->connections; 4275 if (connection) { 4276 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4277 if (!hci_can_send_command_packet_now()) return; 4278 4279 // check state 4280 if (connection->state == SENT_DISCONNECT) return; 4281 connection->state = SENT_DISCONNECT; 4282 4283 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4284 4285 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4286 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4287 4288 // ... which would be ignored anyway as we shutdown (free) the connection now 4289 hci_shutdown_connection(connection); 4290 4291 // finally, send the disconnect command 4292 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4293 return; 4294 } 4295 4296 btstack_run_loop_remove_timer(&hci_stack->timeout); 4297 4298 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4299 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4300 log_info("HCI_STATE_HALTING: wait 50 ms"); 4301 hci_stack->substate = HCI_HALTING_W4_TIMER; 4302 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4303 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4304 btstack_run_loop_add_timer(&hci_stack->timeout); 4305 break; 4306 } 4307 4308 /* fall through */ 4309 4310 case HCI_HALTING_CLOSE: 4311 // close left over connections (that had not been properly closed before) 4312 hci_discard_connections(); 4313 4314 log_info("HCI_STATE_HALTING, calling off"); 4315 4316 // switch mode 4317 hci_power_control_off(); 4318 4319 log_info("HCI_STATE_HALTING, emitting state"); 4320 hci_emit_state(); 4321 log_info("HCI_STATE_HALTING, done"); 4322 break; 4323 4324 case HCI_HALTING_W4_TIMER: 4325 // keep waiting 4326 4327 break; 4328 default: 4329 break; 4330 } 4331 }; 4332 4333 static void hci_falling_asleep_run(void){ 4334 hci_connection_t * connection; 4335 switch(hci_stack->substate) { 4336 case HCI_FALLING_ASLEEP_DISCONNECT: 4337 log_info("HCI_STATE_FALLING_ASLEEP"); 4338 // close all open connections 4339 connection = (hci_connection_t *) hci_stack->connections; 4340 if (connection){ 4341 4342 // send disconnect 4343 if (!hci_can_send_command_packet_now()) return; 4344 4345 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4346 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4347 4348 // send disconnected event right away - causes higher layer connections to get closed, too. 4349 hci_shutdown_connection(connection); 4350 return; 4351 } 4352 4353 if (hci_classic_supported()){ 4354 // disable page and inquiry scan 4355 if (!hci_can_send_command_packet_now()) return; 4356 4357 log_info("HCI_STATE_HALTING, disabling inq scans"); 4358 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4359 4360 // continue in next sub state 4361 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4362 break; 4363 } 4364 4365 /* fall through */ 4366 4367 case HCI_FALLING_ASLEEP_COMPLETE: 4368 log_info("HCI_STATE_HALTING, calling sleep"); 4369 // switch mode 4370 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4371 hci_emit_state(); 4372 break; 4373 4374 default: 4375 break; 4376 } 4377 } 4378 4379 #ifdef ENABLE_CLASSIC 4380 4381 static void hci_update_scan_enable(void){ 4382 // 2 = page scan, 1 = inq scan 4383 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4384 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4385 hci_run(); 4386 } 4387 4388 void gap_discoverable_control(uint8_t enable){ 4389 if (enable) enable = 1; // normalize argument 4390 4391 if (hci_stack->discoverable == enable){ 4392 hci_emit_discoverable_enabled(hci_stack->discoverable); 4393 return; 4394 } 4395 4396 hci_stack->discoverable = enable; 4397 hci_update_scan_enable(); 4398 } 4399 4400 void gap_connectable_control(uint8_t enable){ 4401 if (enable) enable = 1; // normalize argument 4402 4403 // don't emit event 4404 if (hci_stack->connectable == enable) return; 4405 4406 hci_stack->connectable = enable; 4407 hci_update_scan_enable(); 4408 } 4409 #endif 4410 4411 void gap_local_bd_addr(bd_addr_t address_buffer){ 4412 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4413 } 4414 4415 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4416 static void hci_host_num_completed_packets(void){ 4417 4418 // create packet manually as arrays are not supported and num_commands should not get reduced 4419 hci_reserve_packet_buffer(); 4420 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4421 4422 uint16_t size = 0; 4423 uint16_t num_handles = 0; 4424 packet[size++] = 0x35; 4425 packet[size++] = 0x0c; 4426 size++; // skip param len 4427 size++; // skip num handles 4428 4429 // add { handle, packets } entries 4430 btstack_linked_item_t * it; 4431 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4432 hci_connection_t * connection = (hci_connection_t *) it; 4433 if (connection->num_packets_completed){ 4434 little_endian_store_16(packet, size, connection->con_handle); 4435 size += 2; 4436 little_endian_store_16(packet, size, connection->num_packets_completed); 4437 size += 2; 4438 // 4439 num_handles++; 4440 connection->num_packets_completed = 0; 4441 } 4442 } 4443 4444 packet[2] = size - 3; 4445 packet[3] = num_handles; 4446 4447 hci_stack->host_completed_packets = 0; 4448 4449 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4450 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4451 4452 // release packet buffer for synchronous transport implementations 4453 if (hci_transport_synchronous()){ 4454 hci_release_packet_buffer(); 4455 hci_emit_transport_packet_sent(); 4456 } 4457 } 4458 #endif 4459 4460 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4461 UNUSED(ds); 4462 hci_stack->substate = HCI_HALTING_CLOSE; 4463 // allow packet handlers to defer final shutdown 4464 hci_emit_state(); 4465 hci_run(); 4466 } 4467 4468 static bool hci_run_acl_fragments(void){ 4469 if (hci_stack->acl_fragmentation_total_size > 0u) { 4470 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4471 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4472 if (connection) { 4473 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4474 hci_send_acl_packet_fragments(connection); 4475 return true; 4476 } 4477 } else { 4478 // connection gone -> discard further fragments 4479 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4480 hci_stack->acl_fragmentation_total_size = 0; 4481 hci_stack->acl_fragmentation_pos = 0; 4482 } 4483 } 4484 return false; 4485 } 4486 4487 #ifdef ENABLE_CLASSIC 4488 static bool hci_run_general_gap_classic(void){ 4489 4490 // assert stack is working and classic is active 4491 if (hci_classic_supported() == false) return false; 4492 if (hci_stack->state != HCI_STATE_WORKING) return false; 4493 4494 // decline incoming connections 4495 if (hci_stack->decline_reason){ 4496 uint8_t reason = hci_stack->decline_reason; 4497 hci_stack->decline_reason = 0; 4498 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4499 return true; 4500 } 4501 4502 if (hci_stack->gap_tasks_classic != 0){ 4503 hci_run_gap_tasks_classic(); 4504 return true; 4505 } 4506 4507 // start/stop inquiry 4508 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4509 uint8_t duration = hci_stack->inquiry_state; 4510 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4511 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4512 return true; 4513 } 4514 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4515 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4516 hci_send_cmd(&hci_inquiry_cancel); 4517 return true; 4518 } 4519 // remote name request 4520 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4521 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4522 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4523 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4524 return true; 4525 } 4526 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4527 // Local OOB data 4528 if (hci_stack->classic_read_local_oob_data){ 4529 hci_stack->classic_read_local_oob_data = false; 4530 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4531 hci_send_cmd(&hci_read_local_extended_oob_data); 4532 } else { 4533 hci_send_cmd(&hci_read_local_oob_data); 4534 } 4535 } 4536 #endif 4537 // pairing 4538 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4539 uint8_t state = hci_stack->gap_pairing_state; 4540 uint8_t pin_code[16]; 4541 switch (state){ 4542 case GAP_PAIRING_STATE_SEND_PIN: 4543 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4544 memset(pin_code, 0, 16); 4545 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4546 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4547 break; 4548 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4549 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4550 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4551 break; 4552 case GAP_PAIRING_STATE_SEND_PASSKEY: 4553 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4554 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4555 break; 4556 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4557 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4558 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4559 break; 4560 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4561 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4562 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4563 break; 4564 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4565 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4566 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4567 break; 4568 default: 4569 break; 4570 } 4571 return true; 4572 } 4573 return false; 4574 } 4575 #endif 4576 4577 #ifdef ENABLE_BLE 4578 4579 #ifdef ENABLE_LE_PERIPHERAL 4580 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4581 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4582 uint8_t operation = 0; 4583 if (pos == 0){ 4584 // first fragment or complete data 4585 operation |= 1; 4586 } 4587 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4588 // last fragment or complete data 4589 operation |= 2; 4590 } 4591 return operation; 4592 } 4593 #endif 4594 #endif 4595 4596 static bool hci_run_general_gap_le(void){ 4597 4598 // Phase 1: collect what to stop 4599 4600 bool scanning_stop = false; 4601 bool connecting_stop = false; 4602 bool advertising_stop = false; 4603 4604 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4605 le_advertising_set_t * advertising_stop_set = NULL; 4606 #endif 4607 4608 #ifndef ENABLE_LE_CENTRAL 4609 UNUSED(scanning_stop); 4610 UNUSED(connecting_stop); 4611 #endif 4612 #ifndef ENABLE_LE_PERIPHERAL 4613 UNUSED(advertising_stop); 4614 #endif 4615 4616 // check if own address changes 4617 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4618 4619 // check if whitelist needs modification 4620 bool whitelist_modification_pending = false; 4621 btstack_linked_list_iterator_t lit; 4622 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4623 while (btstack_linked_list_iterator_has_next(&lit)){ 4624 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4625 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4626 whitelist_modification_pending = true; 4627 break; 4628 } 4629 } 4630 // check if resolving list needs modification 4631 bool resolving_list_modification_pending = false; 4632 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4633 4634 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4635 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4636 resolving_list_modification_pending = true; 4637 } 4638 #endif 4639 4640 #ifdef ENABLE_LE_CENTRAL 4641 // scanning control 4642 if (hci_stack->le_scanning_active) { 4643 // stop if: 4644 // - parameter change required 4645 // - it's disabled 4646 // - whitelist change required but used for scanning 4647 // - resolving list modified 4648 // - own address changes 4649 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4650 if ((hci_stack->le_scanning_param_update) || 4651 !hci_stack->le_scanning_enabled || 4652 scanning_uses_whitelist || 4653 resolving_list_modification_pending || 4654 random_address_change){ 4655 4656 scanning_stop = true; 4657 } 4658 } 4659 #endif 4660 4661 #ifdef ENABLE_LE_CENTRAL 4662 // connecting control 4663 bool connecting_with_whitelist; 4664 switch (hci_stack->le_connecting_state){ 4665 case LE_CONNECTING_DIRECT: 4666 case LE_CONNECTING_WHITELIST: 4667 // stop connecting if: 4668 // - connecting uses white and whitelist modification pending 4669 // - if it got disabled 4670 // - resolving list modified 4671 // - own address changes 4672 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4673 if ((connecting_with_whitelist && whitelist_modification_pending) || 4674 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4675 resolving_list_modification_pending || 4676 random_address_change) { 4677 4678 connecting_stop = true; 4679 } 4680 break; 4681 default: 4682 break; 4683 } 4684 #endif 4685 4686 #ifdef ENABLE_LE_PERIPHERAL 4687 // le advertisement control 4688 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4689 // stop if: 4690 // - parameter change required 4691 // - random address used in advertising and changes 4692 // - it's disabled 4693 // - whitelist change required but used for advertisement filter policy 4694 // - resolving list modified 4695 // - own address changes 4696 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4697 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4698 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4699 if (advertising_change || 4700 (advertising_uses_random_address && random_address_change) || 4701 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4702 (advertising_uses_whitelist && whitelist_modification_pending) || 4703 resolving_list_modification_pending || 4704 random_address_change) { 4705 4706 advertising_stop = true; 4707 } 4708 } 4709 4710 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4711 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4712 btstack_linked_list_iterator_t it; 4713 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4714 while (btstack_linked_list_iterator_has_next(&it)){ 4715 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4716 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0) continue; 4717 // stop if: 4718 // - parameter change required 4719 // - random address used in connectable advertising and changes 4720 // - it's disabled 4721 // - whitelist change required but used for advertisement filter policy 4722 // - resolving list modified 4723 // - own address changes 4724 // - advertisement set will be removed 4725 bool advertising_uses_whitelist = advertising_set->params.advertising_filter_policy != 0; 4726 bool advertising_connectable = (advertising_set->params.advertising_event_properties & 1) != 0; 4727 bool advertising_uses_random_address = (advertising_set->params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && advertising_connectable; 4728 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4729 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4730 bool advertising_set_random_address_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4731 bool advertising_set_will_be_removed = (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4732 if (advertising_parameter_change || 4733 (advertising_uses_random_address && advertising_set_random_address_change) || 4734 (advertising_enabled == false) || 4735 (advertising_uses_whitelist && whitelist_modification_pending) || 4736 resolving_list_modification_pending || 4737 advertising_set_will_be_removed) { 4738 4739 advertising_stop = true; 4740 advertising_stop_set = advertising_set; 4741 break; 4742 } 4743 } 4744 } 4745 #endif 4746 4747 #endif 4748 4749 4750 // Phase 2: stop everything that should be off during modifications 4751 4752 #ifdef ENABLE_LE_CENTRAL 4753 if (scanning_stop){ 4754 hci_stack->le_scanning_active = false; 4755 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4756 if (hci_extended_advertising_supported()) { 4757 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4758 } else 4759 #endif 4760 { 4761 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4762 } 4763 return true; 4764 } 4765 #endif 4766 4767 #ifdef ENABLE_LE_CENTRAL 4768 if (connecting_stop){ 4769 hci_send_cmd(&hci_le_create_connection_cancel); 4770 return true; 4771 } 4772 #endif 4773 4774 #ifdef ENABLE_LE_PERIPHERAL 4775 if (advertising_stop){ 4776 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4777 if (hci_extended_advertising_supported()) { 4778 uint8_t advertising_stop_handle; 4779 if (advertising_stop_set != NULL){ 4780 advertising_stop_handle = advertising_stop_set->advertising_handle; 4781 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4782 } else { 4783 advertising_stop_handle = 0; 4784 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4785 } 4786 const uint8_t advertising_handles[] = { advertising_stop_handle }; 4787 const uint16_t durations[] = { 0 }; 4788 const uint16_t max_events[] = { 0 }; 4789 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 4790 } else 4791 #endif 4792 { 4793 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4794 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4795 } 4796 return true; 4797 } 4798 #endif 4799 4800 // Phase 3: modify 4801 4802 if (random_address_change){ 4803 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4804 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4805 if (hci_extended_advertising_supported()) { 4806 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 4807 } 4808 #endif 4809 { 4810 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4811 } 4812 return true; 4813 } 4814 4815 #ifdef ENABLE_LE_PERIPHERAL 4816 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4817 if (hci_extended_advertising_supported()) { 4818 btstack_linked_list_iterator_t it; 4819 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4820 while (btstack_linked_list_iterator_has_next(&it)){ 4821 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4822 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 4823 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4824 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 4825 return true; 4826 } 4827 } 4828 } 4829 #endif 4830 #endif 4831 4832 #ifdef ENABLE_LE_CENTRAL 4833 if (hci_stack->le_scanning_param_update){ 4834 hci_stack->le_scanning_param_update = false; 4835 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4836 if (hci_extended_advertising_supported()){ 4837 // prepare arrays for all PHYs 4838 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 4839 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 4840 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 4841 uint8_t scanning_phys = 1; // LE 1M PHY 4842 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 4843 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 4844 } else 4845 #endif 4846 { 4847 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4848 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4849 } 4850 return true; 4851 } 4852 #endif 4853 4854 #ifdef ENABLE_LE_PERIPHERAL 4855 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4856 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4857 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4858 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4859 if (hci_extended_advertising_supported()){ 4860 // map advertisment type to advertising event properties 4861 uint16_t adv_event_properties = 0; 4862 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 4863 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 4864 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 4865 } 4866 hci_stack->le_advertising_set_in_current_command = 0; 4867 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 4868 0, 4869 adv_event_properties, 4870 hci_stack->le_advertisements_interval_min, 4871 hci_stack->le_advertisements_interval_max, 4872 hci_stack->le_advertisements_channel_map, 4873 hci_stack->le_advertisements_own_addr_type, 4874 hci_stack->le_advertisements_direct_address_type, 4875 hci_stack->le_advertisements_direct_address, 4876 hci_stack->le_advertisements_filter_policy, 4877 0x7f, // tx power: no preference 4878 0x01, // primary adv phy: LE 1M 4879 0, // secondary adv max skip 4880 0, // secondary adv phy 4881 0, // adv sid 4882 0 // scan request notification 4883 ); 4884 } 4885 #endif 4886 { 4887 hci_send_cmd(&hci_le_set_advertising_parameters, 4888 hci_stack->le_advertisements_interval_min, 4889 hci_stack->le_advertisements_interval_max, 4890 hci_stack->le_advertisements_type, 4891 hci_stack->le_advertisements_own_addr_type, 4892 hci_stack->le_advertisements_direct_address_type, 4893 hci_stack->le_advertisements_direct_address, 4894 hci_stack->le_advertisements_channel_map, 4895 hci_stack->le_advertisements_filter_policy); 4896 } 4897 return true; 4898 } 4899 4900 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4901 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4902 uint8_t adv_data_clean[31]; 4903 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4904 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4905 hci_stack->le_advertisements_data_len); 4906 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4907 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4908 if (hci_extended_advertising_supported()){ 4909 hci_stack->le_advertising_set_in_current_command = 0; 4910 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 4911 } else 4912 #endif 4913 { 4914 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4915 } 4916 return true; 4917 } 4918 4919 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4920 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4921 uint8_t scan_data_clean[31]; 4922 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4923 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4924 hci_stack->le_scan_response_data_len); 4925 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4926 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4927 if (hci_extended_advertising_supported()){ 4928 hci_stack->le_advertising_set_in_current_command = 0; 4929 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 4930 } else 4931 #endif 4932 { 4933 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4934 } 4935 return true; 4936 } 4937 4938 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4939 if (hci_extended_advertising_supported()) { 4940 btstack_linked_list_iterator_t it; 4941 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4942 while (btstack_linked_list_iterator_has_next(&it)){ 4943 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4944 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 4945 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 4946 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 4947 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 4948 return true; 4949 } 4950 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 4951 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4952 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 4953 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 4954 advertising_set->advertising_handle, 4955 advertising_set->params.advertising_event_properties, 4956 advertising_set->params.primary_advertising_interval_min, 4957 advertising_set->params.primary_advertising_interval_max, 4958 advertising_set->params.primary_advertising_channel_map, 4959 advertising_set->params.own_address_type, 4960 advertising_set->params.peer_address_type, 4961 advertising_set->params.peer_address, 4962 advertising_set->params.advertising_filter_policy, 4963 advertising_set->params.advertising_tx_power, 4964 advertising_set->params.primary_advertising_phy, 4965 advertising_set->params.secondary_advertising_max_skip, 4966 advertising_set->params.secondary_advertising_phy, 4967 advertising_set->params.advertising_sid, 4968 advertising_set->params.scan_request_notification_enable 4969 ); 4970 return true; 4971 } 4972 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 4973 uint16_t pos = advertising_set->adv_data_pos; 4974 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 4975 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 4976 if ((operation & 0x02) != 0){ 4977 // last fragment or complete data 4978 operation |= 2; 4979 advertising_set->adv_data_pos = 0; 4980 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4981 } else { 4982 advertising_set->adv_data_pos += data_to_upload; 4983 } 4984 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 4985 hci_send_cmd(&hci_le_set_extended_advertising_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 4986 return true; 4987 } 4988 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 4989 uint16_t pos = advertising_set->scan_data_pos; 4990 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 4991 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 4992 if ((operation & 0x02) != 0){ 4993 advertising_set->scan_data_pos = 0; 4994 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4995 } else { 4996 advertising_set->scan_data_pos += data_to_upload; 4997 } 4998 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 4999 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5000 return true; 5001 } 5002 } 5003 } 5004 #endif 5005 5006 5007 #endif 5008 5009 5010 #ifdef ENABLE_LE_CENTRAL 5011 // if connect with whitelist was active and is not cancelled yet, wait until next time 5012 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5013 #endif 5014 5015 // LE Whitelist Management 5016 if (whitelist_modification_pending){ 5017 // add/remove entries 5018 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5019 while (btstack_linked_list_iterator_has_next(&lit)){ 5020 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5021 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5022 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5023 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5024 return true; 5025 } 5026 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5027 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5028 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5029 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5030 return true; 5031 } 5032 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5033 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5034 btstack_memory_whitelist_entry_free(entry); 5035 } 5036 } 5037 } 5038 5039 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5040 // LE Resolving List Management 5041 if (resolving_list_supported) { 5042 uint16_t i; 5043 switch (hci_stack->le_resolving_list_state) { 5044 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5045 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5046 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5047 return true; 5048 case LE_RESOLVING_LIST_READ_SIZE: 5049 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5050 hci_send_cmd(&hci_le_read_resolving_list_size); 5051 return true; 5052 case LE_RESOLVING_LIST_SEND_CLEAR: 5053 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5054 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5055 sizeof(hci_stack->le_resolving_list_add_entries)); 5056 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5057 sizeof(hci_stack->le_resolving_list_remove_entries)); 5058 hci_send_cmd(&hci_le_clear_resolving_list); 5059 return true; 5060 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5061 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5062 uint8_t offset = i >> 3; 5063 uint8_t mask = 1 << (i & 7); 5064 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5065 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5066 bd_addr_t peer_identity_addreses; 5067 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5068 sm_key_t peer_irk; 5069 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5070 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5071 5072 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5073 // trigger whitelist entry 'update' (work around for controller bug) 5074 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5075 while (btstack_linked_list_iterator_has_next(&lit)) { 5076 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5077 if (entry->address_type != peer_identity_addr_type) continue; 5078 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5079 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5080 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5081 } 5082 #endif 5083 5084 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5085 peer_identity_addreses); 5086 return true; 5087 } 5088 5089 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5090 5091 /* fall through */ 5092 5093 case LE_RESOLVING_LIST_ADD_ENTRIES: 5094 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5095 uint8_t offset = i >> 3; 5096 uint8_t mask = 1 << (i & 7); 5097 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5098 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5099 bd_addr_t peer_identity_addreses; 5100 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5101 sm_key_t peer_irk; 5102 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5103 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5104 const uint8_t *local_irk = gap_get_persistent_irk(); 5105 // command uses format specifier 'P' that stores 16-byte value without flip 5106 uint8_t local_irk_flipped[16]; 5107 uint8_t peer_irk_flipped[16]; 5108 reverse_128(local_irk, local_irk_flipped); 5109 reverse_128(peer_irk, peer_irk_flipped); 5110 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5111 peer_irk_flipped, local_irk_flipped); 5112 return true; 5113 } 5114 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5115 break; 5116 5117 default: 5118 break; 5119 } 5120 } 5121 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5122 #endif 5123 5124 // post-pone all actions until stack is fully working 5125 if (hci_stack->state != HCI_STATE_WORKING) return false; 5126 5127 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5128 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5129 5130 // Phase 4: restore state 5131 5132 #ifdef ENABLE_LE_CENTRAL 5133 // re-start scanning 5134 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5135 hci_stack->le_scanning_active = true; 5136 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5137 if (hci_extended_advertising_supported()){ 5138 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5139 } else 5140 #endif 5141 { 5142 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5143 } 5144 return true; 5145 } 5146 #endif 5147 5148 #ifdef ENABLE_LE_CENTRAL 5149 // re-start connecting 5150 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5151 bd_addr_t null_addr; 5152 memset(null_addr, 0, 6); 5153 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5154 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5155 hci_send_cmd(&hci_le_create_connection, 5156 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5157 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5158 1, // use whitelist 5159 0, // peer address type 5160 null_addr, // peer bd addr 5161 hci_stack->le_connection_own_addr_type, // our addr type: 5162 hci_stack->le_connection_interval_min, // conn interval min 5163 hci_stack->le_connection_interval_max, // conn interval max 5164 hci_stack->le_connection_latency, // conn latency 5165 hci_stack->le_supervision_timeout, // conn latency 5166 hci_stack->le_minimum_ce_length, // min ce length 5167 hci_stack->le_maximum_ce_length // max ce length 5168 ); 5169 return true; 5170 } 5171 #endif 5172 5173 #ifdef ENABLE_LE_PERIPHERAL 5174 // re-start advertising 5175 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5176 // check if advertisements should be enabled given 5177 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5178 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5179 5180 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5181 if (hci_extended_advertising_supported()){ 5182 const uint8_t advertising_handles[] = { 0 }; 5183 const uint16_t durations[] = { 0 }; 5184 const uint16_t max_events[] = { 0 }; 5185 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5186 } else 5187 #endif 5188 { 5189 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5190 } 5191 return true; 5192 } 5193 5194 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5195 if (hci_extended_advertising_supported()) { 5196 btstack_linked_list_iterator_t it; 5197 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5198 while (btstack_linked_list_iterator_has_next(&it)) { 5199 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5200 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5201 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5202 const uint16_t durations[] = { advertising_set->enable_timeout }; 5203 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5204 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5205 return true; 5206 } 5207 } 5208 } 5209 #endif 5210 #endif 5211 5212 return false; 5213 } 5214 #endif 5215 5216 static bool hci_run_general_pending_commands(void){ 5217 btstack_linked_item_t * it; 5218 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5219 hci_connection_t * connection = (hci_connection_t *) it; 5220 5221 switch(connection->state){ 5222 case SEND_CREATE_CONNECTION: 5223 switch(connection->address_type){ 5224 #ifdef ENABLE_CLASSIC 5225 case BD_ADDR_TYPE_ACL: 5226 log_info("sending hci_create_connection"); 5227 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5228 break; 5229 #endif 5230 default: 5231 #ifdef ENABLE_BLE 5232 #ifdef ENABLE_LE_CENTRAL 5233 log_info("sending hci_le_create_connection"); 5234 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5235 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5236 hci_send_cmd(&hci_le_create_connection, 5237 hci_stack->le_connection_scan_interval, // conn scan interval 5238 hci_stack->le_connection_scan_window, // conn scan windows 5239 0, // don't use whitelist 5240 connection->address_type, // peer address type 5241 connection->address, // peer bd addr 5242 hci_stack->le_connection_own_addr_type, // our addr type: 5243 hci_stack->le_connection_interval_min, // conn interval min 5244 hci_stack->le_connection_interval_max, // conn interval max 5245 hci_stack->le_connection_latency, // conn latency 5246 hci_stack->le_supervision_timeout, // conn latency 5247 hci_stack->le_minimum_ce_length, // min ce length 5248 hci_stack->le_maximum_ce_length // max ce length 5249 ); 5250 connection->state = SENT_CREATE_CONNECTION; 5251 #endif 5252 #endif 5253 break; 5254 } 5255 return true; 5256 5257 #ifdef ENABLE_CLASSIC 5258 case RECEIVED_CONNECTION_REQUEST: 5259 connection->role = HCI_ROLE_SLAVE; 5260 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5261 log_info("sending hci_accept_connection_request"); 5262 connection->state = ACCEPTED_CONNECTION_REQUEST; 5263 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5264 return true; 5265 } 5266 break; 5267 #endif 5268 5269 #ifdef ENABLE_BLE 5270 #ifdef ENABLE_LE_CENTRAL 5271 case SEND_CANCEL_CONNECTION: 5272 connection->state = SENT_CANCEL_CONNECTION; 5273 hci_send_cmd(&hci_le_create_connection_cancel); 5274 return true; 5275 #endif 5276 #endif 5277 case SEND_DISCONNECT: 5278 connection->state = SENT_DISCONNECT; 5279 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5280 return true; 5281 5282 default: 5283 break; 5284 } 5285 5286 // no further commands if connection is about to get shut down 5287 if (connection->state == SENT_DISCONNECT) continue; 5288 5289 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 5290 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 5291 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5292 return true; 5293 } 5294 5295 #ifdef ENABLE_CLASSIC 5296 5297 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 5298 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 5299 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5300 return true; 5301 } 5302 5303 // Handling link key request requires remote supported features 5304 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5305 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5306 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5307 5308 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5309 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5310 if (have_link_key && security_level_sufficient){ 5311 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5312 } else { 5313 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5314 } 5315 return true; 5316 } 5317 5318 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5319 log_info("denying to pin request"); 5320 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5321 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5322 return true; 5323 } 5324 5325 // security assessment requires remote features 5326 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5327 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5328 hci_ssp_assess_security_on_io_cap_request(connection); 5329 // 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 5330 } 5331 5332 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5333 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5334 // set authentication requirements: 5335 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5336 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5337 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5338 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5339 authreq |= 1; 5340 } 5341 bool bonding = hci_stack->bondable; 5342 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5343 // if we have received IO Cap Response, we're in responder role 5344 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5345 if (bonding && !remote_bonding){ 5346 log_info("Remote not bonding, dropping local flag"); 5347 bonding = false; 5348 } 5349 } 5350 if (bonding){ 5351 if (connection->bonding_flags & BONDING_DEDICATED){ 5352 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5353 } else { 5354 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5355 } 5356 } 5357 uint8_t have_oob_data = 0; 5358 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5359 if (connection->classic_oob_c_192 != NULL){ 5360 have_oob_data |= 1; 5361 } 5362 if (connection->classic_oob_c_256 != NULL){ 5363 have_oob_data |= 2; 5364 } 5365 #endif 5366 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5367 return true; 5368 } 5369 5370 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5371 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5372 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5373 return true; 5374 } 5375 5376 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5377 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5378 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5379 const uint8_t zero[16] = { 0 }; 5380 const uint8_t * r_192 = zero; 5381 const uint8_t * c_192 = zero; 5382 const uint8_t * r_256 = zero; 5383 const uint8_t * c_256 = zero; 5384 // verify P-256 OOB 5385 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5386 c_256 = connection->classic_oob_c_256; 5387 if (connection->classic_oob_r_256 != NULL) { 5388 r_256 = connection->classic_oob_r_256; 5389 } 5390 } 5391 // verify P-192 OOB 5392 if ((connection->classic_oob_c_192 != NULL)) { 5393 c_192 = connection->classic_oob_c_192; 5394 if (connection->classic_oob_r_192 != NULL) { 5395 r_192 = connection->classic_oob_r_192; 5396 } 5397 } 5398 5399 // assess security 5400 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5401 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5402 if (need_level_4 && !can_reach_level_4){ 5403 log_info("Level 4 required, but not possible -> abort"); 5404 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5405 // send oob negative reply 5406 c_256 = NULL; 5407 c_192 = NULL; 5408 } 5409 5410 // Reply 5411 if (c_256 != zero) { 5412 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5413 } else if (c_192 != zero){ 5414 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5415 } else { 5416 hci_stack->classic_oob_con_handle = connection->con_handle; 5417 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5418 } 5419 return true; 5420 } 5421 #endif 5422 5423 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5424 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5425 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5426 return true; 5427 } 5428 5429 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5430 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5431 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5432 return true; 5433 } 5434 5435 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5436 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5437 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5438 return true; 5439 } 5440 5441 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5442 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5443 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5444 connection->state = SENT_DISCONNECT; 5445 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5446 return true; 5447 } 5448 5449 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5450 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5451 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5452 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5453 return true; 5454 } 5455 5456 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5457 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5458 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5459 return true; 5460 } 5461 5462 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5463 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5464 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5465 return true; 5466 } 5467 5468 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5469 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5470 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5471 return true; 5472 } 5473 5474 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5475 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5476 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5477 return true; 5478 } 5479 5480 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5481 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5482 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5483 return true; 5484 } 5485 #endif 5486 5487 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5488 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5489 #ifdef ENABLE_CLASSIC 5490 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5491 #endif 5492 if (connection->state != SENT_DISCONNECT){ 5493 connection->state = SENT_DISCONNECT; 5494 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5495 return true; 5496 } 5497 } 5498 5499 #ifdef ENABLE_CLASSIC 5500 uint16_t sniff_min_interval; 5501 switch (connection->sniff_min_interval){ 5502 case 0: 5503 break; 5504 case 0xffff: 5505 connection->sniff_min_interval = 0; 5506 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5507 return true; 5508 default: 5509 sniff_min_interval = connection->sniff_min_interval; 5510 connection->sniff_min_interval = 0; 5511 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5512 return true; 5513 } 5514 5515 if (connection->sniff_subrating_max_latency != 0xffff){ 5516 uint16_t max_latency = connection->sniff_subrating_max_latency; 5517 connection->sniff_subrating_max_latency = 0; 5518 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5519 return true; 5520 } 5521 5522 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5523 uint8_t service_type = (uint8_t) connection->qos_service_type; 5524 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5525 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); 5526 return true; 5527 } 5528 5529 if (connection->request_role != HCI_ROLE_INVALID){ 5530 hci_role_t role = connection->request_role; 5531 connection->request_role = HCI_ROLE_INVALID; 5532 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5533 return true; 5534 } 5535 #endif 5536 5537 #ifdef ENABLE_BLE 5538 switch (connection->le_con_parameter_update_state){ 5539 // response to L2CAP CON PARAMETER UPDATE REQUEST 5540 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5541 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5542 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5543 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5544 0x0000, 0xffff); 5545 return true; 5546 case CON_PARAMETER_UPDATE_REPLY: 5547 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5548 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5549 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5550 0x0000, 0xffff); 5551 return true; 5552 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5553 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5554 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5555 return true; 5556 default: 5557 break; 5558 } 5559 if (connection->le_phy_update_all_phys != 0xffu){ 5560 uint8_t all_phys = connection->le_phy_update_all_phys; 5561 connection->le_phy_update_all_phys = 0xff; 5562 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); 5563 return true; 5564 } 5565 #endif 5566 } 5567 return false; 5568 } 5569 5570 static void hci_run(void){ 5571 5572 // stack state sub statemachines 5573 // halting needs to be called even if we cannot send command packet now 5574 switch (hci_stack->state) { 5575 case HCI_STATE_INITIALIZING: 5576 hci_initializing_run(); 5577 break; 5578 case HCI_STATE_HALTING: 5579 hci_halting_run(); 5580 break; 5581 case HCI_STATE_FALLING_ASLEEP: 5582 hci_falling_asleep_run(); 5583 break; 5584 default: 5585 break; 5586 } 5587 5588 bool done; 5589 5590 // send continuation fragments first, as they block the prepared packet buffer 5591 done = hci_run_acl_fragments(); 5592 if (done) return; 5593 5594 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5595 // send host num completed packets next as they don't require num_cmd_packets > 0 5596 if (!hci_can_send_comand_packet_transport()) return; 5597 if (hci_stack->host_completed_packets){ 5598 hci_host_num_completed_packets(); 5599 return; 5600 } 5601 #endif 5602 5603 if (!hci_can_send_command_packet_now()) return; 5604 5605 // global/non-connection oriented commands 5606 5607 5608 #ifdef ENABLE_CLASSIC 5609 // general gap classic 5610 done = hci_run_general_gap_classic(); 5611 if (done) return; 5612 #endif 5613 5614 #ifdef ENABLE_BLE 5615 // general gap le 5616 done = hci_run_general_gap_le(); 5617 if (done) return; 5618 #endif 5619 5620 // send pending HCI commands 5621 hci_run_general_pending_commands(); 5622 } 5623 5624 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5625 // house-keeping 5626 5627 #ifdef ENABLE_CLASSIC 5628 bd_addr_t addr; 5629 hci_connection_t * conn; 5630 #endif 5631 #ifdef ENABLE_LE_CENTRAL 5632 uint8_t initiator_filter_policy; 5633 #endif 5634 5635 uint16_t opcode = little_endian_read_16(packet, 0); 5636 switch (opcode) { 5637 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5638 hci_stack->loopback_mode = packet[3]; 5639 break; 5640 5641 #ifdef ENABLE_CLASSIC 5642 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5643 reverse_bd_addr(&packet[3], addr); 5644 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5645 5646 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5647 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5648 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5649 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5650 } 5651 5652 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5653 if (!conn) { 5654 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5655 if (!conn) { 5656 // notify client that alloc failed 5657 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5658 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5659 } 5660 conn->state = SEND_CREATE_CONNECTION; 5661 conn->role = HCI_ROLE_MASTER; 5662 } 5663 5664 conn->con_handle = HCI_CON_HANDLE_INVALID; 5665 conn->role = HCI_ROLE_INVALID; 5666 5667 log_info("conn state %u", conn->state); 5668 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5669 switch (conn->state) { 5670 // if connection active exists 5671 case OPEN: 5672 // and OPEN, emit connection complete command 5673 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5674 // packet not sent to controller 5675 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5676 case RECEIVED_DISCONNECTION_COMPLETE: 5677 // create connection triggered in disconnect complete event, let's do it now 5678 break; 5679 case SEND_CREATE_CONNECTION: 5680 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5681 break; 5682 default: 5683 // otherwise, just ignore as it is already in the open process 5684 // packet not sent to controller 5685 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5686 } 5687 conn->state = SENT_CREATE_CONNECTION; 5688 5689 // track outgoing connection 5690 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5691 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5692 break; 5693 5694 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5695 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5696 // setup_synchronous_connection? Voice setting at offset 22 5697 // TODO: compare to current setting if sco connection already active 5698 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5699 break; 5700 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5701 // accept_synchronous_connection? Voice setting at offset 18 5702 // TODO: compare to current setting if sco connection already active 5703 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5704 // track outgoing connection 5705 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5706 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5707 break; 5708 #endif 5709 #endif 5710 5711 #ifdef ENABLE_BLE 5712 #ifdef ENABLE_LE_CENTRAL 5713 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5714 // white list used? 5715 initiator_filter_policy = packet[7]; 5716 switch (initiator_filter_policy) { 5717 case 0: 5718 // whitelist not used 5719 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5720 break; 5721 case 1: 5722 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5723 break; 5724 default: 5725 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5726 break; 5727 } 5728 // track outgoing connection 5729 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5730 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5731 break; 5732 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5733 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5734 break; 5735 #endif 5736 #endif 5737 default: 5738 break; 5739 } 5740 5741 hci_stack->num_cmd_packets--; 5742 5743 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5744 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5745 if (err != 0){ 5746 return ERROR_CODE_HARDWARE_FAILURE; 5747 } 5748 return ERROR_CODE_SUCCESS; 5749 } 5750 5751 // disconnect because of security block 5752 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5753 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5754 if (!connection) return; 5755 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5756 } 5757 5758 5759 // Configure Secure Simple Pairing 5760 5761 #ifdef ENABLE_CLASSIC 5762 5763 // enable will enable SSP during init 5764 void gap_ssp_set_enable(int enable){ 5765 hci_stack->ssp_enable = enable; 5766 } 5767 5768 static int hci_local_ssp_activated(void){ 5769 return gap_ssp_supported() && hci_stack->ssp_enable; 5770 } 5771 5772 // if set, BTstack will respond to io capability request using authentication requirement 5773 void gap_ssp_set_io_capability(int io_capability){ 5774 hci_stack->ssp_io_capability = io_capability; 5775 } 5776 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5777 hci_stack->ssp_authentication_requirement = authentication_requirement; 5778 } 5779 5780 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5781 void gap_ssp_set_auto_accept(int auto_accept){ 5782 hci_stack->ssp_auto_accept = auto_accept; 5783 } 5784 5785 void gap_secure_connections_enable(bool enable){ 5786 hci_stack->secure_connections_enable = enable; 5787 } 5788 5789 #endif 5790 5791 // va_list part of hci_send_cmd 5792 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5793 if (!hci_can_send_command_packet_now()){ 5794 log_error("hci_send_cmd called but cannot send packet now"); 5795 return ERROR_CODE_COMMAND_DISALLOWED; 5796 } 5797 5798 // for HCI INITIALIZATION 5799 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5800 hci_stack->last_cmd_opcode = cmd->opcode; 5801 5802 hci_reserve_packet_buffer(); 5803 uint8_t * packet = hci_stack->hci_packet_buffer; 5804 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5805 uint8_t status = hci_send_cmd_packet(packet, size); 5806 5807 // release packet buffer on error or for synchronous transport implementations 5808 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5809 hci_release_packet_buffer(); 5810 hci_emit_transport_packet_sent(); 5811 } 5812 5813 return status; 5814 } 5815 5816 /** 5817 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5818 */ 5819 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5820 va_list argptr; 5821 va_start(argptr, cmd); 5822 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5823 va_end(argptr); 5824 return status; 5825 } 5826 5827 // Create various non-HCI events. 5828 // TODO: generalize, use table similar to hci_create_command 5829 5830 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5831 // dump packet 5832 if (dump) { 5833 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5834 } 5835 5836 // dispatch to all event handlers 5837 btstack_linked_list_iterator_t it; 5838 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5839 while (btstack_linked_list_iterator_has_next(&it)){ 5840 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5841 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5842 } 5843 } 5844 5845 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5846 if (!hci_stack->acl_packet_handler) return; 5847 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5848 } 5849 5850 #ifdef ENABLE_CLASSIC 5851 static void hci_notify_if_sco_can_send_now(void){ 5852 // notify SCO sender if waiting 5853 if (!hci_stack->sco_waiting_for_can_send_now) return; 5854 if (hci_can_send_sco_packet_now()){ 5855 hci_stack->sco_waiting_for_can_send_now = 0; 5856 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5857 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5858 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5859 } 5860 } 5861 5862 // parsing end emitting has been merged to reduce code size 5863 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5864 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5865 5866 uint8_t * eir_data; 5867 ad_context_t context; 5868 const uint8_t * name; 5869 uint8_t name_len; 5870 5871 if (size < 3) return; 5872 5873 int event_type = hci_event_packet_get_type(packet); 5874 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5875 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5876 5877 switch (event_type){ 5878 case HCI_EVENT_INQUIRY_RESULT: 5879 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5880 if (size != (3 + (num_responses * 14))) return; 5881 break; 5882 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5883 if (size != 257) return; 5884 if (num_responses != 1) return; 5885 break; 5886 default: 5887 return; 5888 } 5889 5890 // event[1] is set at the end 5891 int i; 5892 for (i=0; i<num_responses;i++){ 5893 memset(event, 0, sizeof(event)); 5894 event[0] = GAP_EVENT_INQUIRY_RESULT; 5895 uint8_t event_size = 27; // if name is not set by EIR 5896 5897 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5898 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5899 (void)memcpy(&event[9], 5900 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5901 3); // class of device 5902 (void)memcpy(&event[12], 5903 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5904 2); // clock offset 5905 5906 switch (event_type){ 5907 case HCI_EVENT_INQUIRY_RESULT: 5908 // 14,15,16,17 = 0, size 18 5909 break; 5910 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5911 event[14] = 1; 5912 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5913 // 16,17 = 0, size 18 5914 break; 5915 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5916 event[14] = 1; 5917 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5918 // EIR packets only contain a single inquiry response 5919 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5920 name = NULL; 5921 // Iterate over EIR data 5922 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5923 uint8_t data_type = ad_iterator_get_data_type(&context); 5924 uint8_t data_size = ad_iterator_get_data_len(&context); 5925 const uint8_t * data = ad_iterator_get_data(&context); 5926 // Prefer Complete Local Name over Shortened Local Name 5927 switch (data_type){ 5928 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5929 if (name) continue; 5930 /* fall through */ 5931 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5932 name = data; 5933 name_len = data_size; 5934 break; 5935 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5936 if (data_size != 8) break; 5937 event[16] = 1; 5938 memcpy(&event[17], data, 8); 5939 break; 5940 default: 5941 break; 5942 } 5943 } 5944 if (name){ 5945 event[25] = 1; 5946 // truncate name if needed 5947 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5948 event[26] = len; 5949 (void)memcpy(&event[27], name, len); 5950 event_size += len; 5951 } 5952 break; 5953 default: 5954 return; 5955 } 5956 event[1] = event_size - 2; 5957 hci_emit_event(event, event_size, 1); 5958 } 5959 } 5960 #endif 5961 5962 void hci_emit_state(void){ 5963 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5964 uint8_t event[3]; 5965 event[0] = BTSTACK_EVENT_STATE; 5966 event[1] = sizeof(event) - 2u; 5967 event[2] = hci_stack->state; 5968 hci_emit_event(event, sizeof(event), 1); 5969 } 5970 5971 #ifdef ENABLE_CLASSIC 5972 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5973 uint8_t event[13]; 5974 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5975 event[1] = sizeof(event) - 2; 5976 event[2] = status; 5977 little_endian_store_16(event, 3, con_handle); 5978 reverse_bd_addr(address, &event[5]); 5979 event[11] = 1; // ACL connection 5980 event[12] = 0; // encryption disabled 5981 hci_emit_event(event, sizeof(event), 1); 5982 } 5983 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5984 if (disable_l2cap_timeouts) return; 5985 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5986 uint8_t event[4]; 5987 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5988 event[1] = sizeof(event) - 2; 5989 little_endian_store_16(event, 2, conn->con_handle); 5990 hci_emit_event(event, sizeof(event), 1); 5991 } 5992 #endif 5993 5994 #ifdef ENABLE_BLE 5995 #ifdef ENABLE_LE_CENTRAL 5996 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){ 5997 uint8_t event[21]; 5998 event[0] = HCI_EVENT_LE_META; 5999 event[1] = sizeof(event) - 2u; 6000 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6001 event[3] = status; 6002 little_endian_store_16(event, 4, con_handle); 6003 event[6] = 0; // TODO: role 6004 event[7] = address_type; 6005 reverse_bd_addr(address, &event[8]); 6006 little_endian_store_16(event, 14, 0); // interval 6007 little_endian_store_16(event, 16, 0); // latency 6008 little_endian_store_16(event, 18, 0); // supervision timeout 6009 event[20] = 0; // master clock accuracy 6010 hci_emit_event(event, sizeof(event), 1); 6011 } 6012 #endif 6013 #endif 6014 6015 static void hci_emit_transport_packet_sent(void){ 6016 // notify upper stack that it might be possible to send again 6017 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6018 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6019 } 6020 6021 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6022 uint8_t event[6]; 6023 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6024 event[1] = sizeof(event) - 2u; 6025 event[2] = 0; // status = OK 6026 little_endian_store_16(event, 3, con_handle); 6027 event[5] = reason; 6028 hci_emit_event(event, sizeof(event), 1); 6029 } 6030 6031 static void hci_emit_nr_connections_changed(void){ 6032 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6033 uint8_t event[3]; 6034 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6035 event[1] = sizeof(event) - 2u; 6036 event[2] = nr_hci_connections(); 6037 hci_emit_event(event, sizeof(event), 1); 6038 } 6039 6040 static void hci_emit_hci_open_failed(void){ 6041 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6042 uint8_t event[2]; 6043 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6044 event[1] = sizeof(event) - 2u; 6045 hci_emit_event(event, sizeof(event), 1); 6046 } 6047 6048 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6049 log_info("hci_emit_dedicated_bonding_result %u ", status); 6050 uint8_t event[9]; 6051 int pos = 0; 6052 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6053 event[pos++] = sizeof(event) - 2u; 6054 event[pos++] = status; 6055 reverse_bd_addr(address, &event[pos]); 6056 hci_emit_event(event, sizeof(event), 1); 6057 } 6058 6059 6060 #ifdef ENABLE_CLASSIC 6061 6062 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6063 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6064 uint8_t event[5]; 6065 int pos = 0; 6066 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6067 event[pos++] = sizeof(event) - 2; 6068 little_endian_store_16(event, 2, con_handle); 6069 pos += 2; 6070 event[pos++] = level; 6071 hci_emit_event(event, sizeof(event), 1); 6072 } 6073 6074 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6075 if (!connection) return LEVEL_0; 6076 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6077 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6078 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6079 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6080 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6081 // LEVEL 4 always requires 128 bit encrytion key size 6082 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6083 security_level = LEVEL_3; 6084 } 6085 return security_level; 6086 } 6087 6088 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6089 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6090 uint8_t event[3]; 6091 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6092 event[1] = sizeof(event) - 2; 6093 event[2] = enabled; 6094 hci_emit_event(event, sizeof(event), 1); 6095 } 6096 6097 // query if remote side supports eSCO 6098 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6099 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6100 if (!connection) return false; 6101 return (connection->remote_supported_features[0] & 1) != 0; 6102 } 6103 6104 static bool hci_ssp_supported(hci_connection_t * connection){ 6105 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6106 return (connection->bonding_flags & mask) == mask; 6107 } 6108 6109 // query if remote side supports SSP 6110 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6111 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6112 if (!connection) return false; 6113 return hci_ssp_supported(connection) ? 1 : 0; 6114 } 6115 6116 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6117 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6118 } 6119 6120 /** 6121 * Check if remote supported features query has completed 6122 */ 6123 bool hci_remote_features_available(hci_con_handle_t handle){ 6124 hci_connection_t * connection = hci_connection_for_handle(handle); 6125 if (!connection) return false; 6126 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6127 } 6128 6129 /** 6130 * Trigger remote supported features query 6131 */ 6132 6133 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6134 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6135 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6136 } 6137 } 6138 6139 void hci_remote_features_query(hci_con_handle_t con_handle){ 6140 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6141 if (!connection) return; 6142 hci_trigger_remote_features_for_connection(connection); 6143 hci_run(); 6144 } 6145 6146 // GAP API 6147 /** 6148 * @bbrief enable/disable bonding. default is enabled 6149 * @praram enabled 6150 */ 6151 void gap_set_bondable_mode(int enable){ 6152 hci_stack->bondable = enable ? 1 : 0; 6153 } 6154 /** 6155 * @brief Get bondable mode. 6156 * @return 1 if bondable 6157 */ 6158 int gap_get_bondable_mode(void){ 6159 return hci_stack->bondable; 6160 } 6161 6162 /** 6163 * @brief map link keys to security levels 6164 */ 6165 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6166 switch (link_key_type){ 6167 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6168 return LEVEL_4; 6169 case COMBINATION_KEY: 6170 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6171 return LEVEL_3; 6172 default: 6173 return LEVEL_2; 6174 } 6175 } 6176 6177 /** 6178 * @brief map link keys to secure connection yes/no 6179 */ 6180 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6181 switch (link_key_type){ 6182 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6183 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6184 return true; 6185 default: 6186 return false; 6187 } 6188 } 6189 6190 /** 6191 * @brief map link keys to authenticated 6192 */ 6193 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6194 switch (link_key_type){ 6195 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6196 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6197 return true; 6198 default: 6199 return false; 6200 } 6201 } 6202 6203 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6204 log_info("gap_mitm_protection_required_for_security_level %u", level); 6205 return level > LEVEL_2; 6206 } 6207 6208 /** 6209 * @brief get current security level 6210 */ 6211 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6212 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6213 if (!connection) return LEVEL_0; 6214 return gap_security_level_for_connection(connection); 6215 } 6216 6217 /** 6218 * @brief request connection to device to 6219 * @result GAP_AUTHENTICATION_RESULT 6220 */ 6221 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6222 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6223 if (!connection){ 6224 hci_emit_security_level(con_handle, LEVEL_0); 6225 return; 6226 } 6227 6228 btstack_assert(hci_is_le_connection(connection) == false); 6229 6230 // 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) 6231 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6232 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6233 requested_level = LEVEL_4; 6234 } 6235 6236 gap_security_level_t current_level = gap_security_level(con_handle); 6237 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6238 requested_level, connection->requested_security_level, current_level); 6239 6240 // authentication active if authentication request was sent or planned level > 0 6241 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6242 if (authentication_active){ 6243 // authentication already active 6244 if (connection->requested_security_level < requested_level){ 6245 // increase requested level as new level is higher 6246 // TODO: handle re-authentication when done 6247 connection->requested_security_level = requested_level; 6248 } 6249 } else { 6250 // no request active, notify if security sufficient 6251 if (requested_level <= current_level){ 6252 hci_emit_security_level(con_handle, current_level); 6253 return; 6254 } 6255 6256 // store request 6257 connection->requested_security_level = requested_level; 6258 6259 // request remote features if not already active 6260 hci_remote_features_query(con_handle); 6261 6262 // start to authenticate connection 6263 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6264 hci_run(); 6265 } 6266 } 6267 6268 /** 6269 * @brief start dedicated bonding with device. disconnect after bonding 6270 * @param device 6271 * @param request MITM protection 6272 * @result GAP_DEDICATED_BONDING_COMPLETE 6273 */ 6274 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6275 6276 // create connection state machine 6277 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6278 6279 if (!connection){ 6280 return BTSTACK_MEMORY_ALLOC_FAILED; 6281 } 6282 6283 // delete linkn key 6284 gap_drop_link_key_for_bd_addr(device); 6285 6286 // configure LEVEL_2/3, dedicated bonding 6287 connection->state = SEND_CREATE_CONNECTION; 6288 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6289 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6290 connection->bonding_flags = BONDING_DEDICATED; 6291 6292 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6293 6294 // handle: connnection failure (connection complete != ok) 6295 // handle: authentication failure 6296 // handle: disconnect on done 6297 6298 hci_run(); 6299 6300 return 0; 6301 } 6302 6303 void gap_set_local_name(const char * local_name){ 6304 hci_stack->local_name = local_name; 6305 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6306 // also update EIR if not set by user 6307 if (hci_stack->eir_data == NULL){ 6308 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6309 } 6310 hci_run(); 6311 } 6312 #endif 6313 6314 6315 #ifdef ENABLE_BLE 6316 6317 #ifdef ENABLE_LE_CENTRAL 6318 void gap_start_scan(void){ 6319 hci_stack->le_scanning_enabled = true; 6320 hci_run(); 6321 } 6322 6323 void gap_stop_scan(void){ 6324 hci_stack->le_scanning_enabled = false; 6325 hci_run(); 6326 } 6327 6328 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6329 hci_stack->le_scan_type = scan_type; 6330 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6331 hci_stack->le_scan_interval = scan_interval; 6332 hci_stack->le_scan_window = scan_window; 6333 hci_stack->le_scanning_param_update = true; 6334 hci_run(); 6335 } 6336 6337 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6338 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6339 } 6340 6341 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6342 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6343 if (!conn){ 6344 // disallow if le connection is already outgoing 6345 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6346 log_error("le connection already active"); 6347 return ERROR_CODE_COMMAND_DISALLOWED; 6348 } 6349 6350 log_info("gap_connect: no connection exists yet, creating context"); 6351 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6352 if (!conn){ 6353 // notify client that alloc failed 6354 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6355 log_info("gap_connect: failed to alloc hci_connection_t"); 6356 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6357 } 6358 6359 // set le connecting state 6360 if (hci_is_le_connection_type(addr_type)){ 6361 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6362 } 6363 6364 conn->state = SEND_CREATE_CONNECTION; 6365 log_info("gap_connect: send create connection next"); 6366 hci_run(); 6367 return ERROR_CODE_SUCCESS; 6368 } 6369 6370 if (!hci_is_le_connection(conn) || 6371 (conn->state == SEND_CREATE_CONNECTION) || 6372 (conn->state == SENT_CREATE_CONNECTION)) { 6373 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6374 log_error("gap_connect: classic connection or connect is already being created"); 6375 return GATT_CLIENT_IN_WRONG_STATE; 6376 } 6377 6378 // check if connection was just disconnected 6379 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6380 log_info("gap_connect: send create connection (again)"); 6381 conn->state = SEND_CREATE_CONNECTION; 6382 hci_run(); 6383 return ERROR_CODE_SUCCESS; 6384 } 6385 6386 log_info("gap_connect: context exists with state %u", conn->state); 6387 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6388 hci_run(); 6389 return ERROR_CODE_SUCCESS; 6390 } 6391 6392 // @assumption: only a single outgoing LE Connection exists 6393 static hci_connection_t * gap_get_outgoing_connection(void){ 6394 btstack_linked_item_t *it; 6395 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6396 hci_connection_t * conn = (hci_connection_t *) it; 6397 if (!hci_is_le_connection(conn)) continue; 6398 switch (conn->state){ 6399 case SEND_CREATE_CONNECTION: 6400 case SENT_CREATE_CONNECTION: 6401 case SENT_CANCEL_CONNECTION: 6402 return conn; 6403 default: 6404 break; 6405 }; 6406 } 6407 return NULL; 6408 } 6409 6410 uint8_t gap_connect_cancel(void){ 6411 hci_connection_t * conn = gap_get_outgoing_connection(); 6412 if (!conn) return 0; 6413 switch (conn->state){ 6414 case SEND_CREATE_CONNECTION: 6415 // skip sending create connection and emit event instead 6416 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6417 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6418 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6419 btstack_memory_hci_connection_free( conn ); 6420 break; 6421 case SENT_CREATE_CONNECTION: 6422 // request to send cancel connection 6423 conn->state = SEND_CANCEL_CONNECTION; 6424 hci_run(); 6425 break; 6426 default: 6427 break; 6428 } 6429 return 0; 6430 } 6431 6432 /** 6433 * @brief Set connection parameters for outgoing connections 6434 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6435 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6436 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6437 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6438 * @param conn_latency, default: 4 6439 * @param supervision_timeout (unit: 10ms), default: 720 ms 6440 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6441 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6442 */ 6443 6444 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6445 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6446 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6447 hci_stack->le_connection_scan_interval = conn_scan_interval; 6448 hci_stack->le_connection_scan_window = conn_scan_window; 6449 hci_stack->le_connection_interval_min = conn_interval_min; 6450 hci_stack->le_connection_interval_max = conn_interval_max; 6451 hci_stack->le_connection_latency = conn_latency; 6452 hci_stack->le_supervision_timeout = supervision_timeout; 6453 hci_stack->le_minimum_ce_length = min_ce_length; 6454 hci_stack->le_maximum_ce_length = max_ce_length; 6455 } 6456 #endif 6457 6458 /** 6459 * @brief Updates the connection parameters for a given LE connection 6460 * @param handle 6461 * @param conn_interval_min (unit: 1.25ms) 6462 * @param conn_interval_max (unit: 1.25ms) 6463 * @param conn_latency 6464 * @param supervision_timeout (unit: 10ms) 6465 * @return 0 if ok 6466 */ 6467 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6468 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6469 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6470 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6471 connection->le_conn_interval_min = conn_interval_min; 6472 connection->le_conn_interval_max = conn_interval_max; 6473 connection->le_conn_latency = conn_latency; 6474 connection->le_supervision_timeout = supervision_timeout; 6475 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6476 hci_run(); 6477 return 0; 6478 } 6479 6480 /** 6481 * @brief Request an update of the connection parameter for a given LE connection 6482 * @param handle 6483 * @param conn_interval_min (unit: 1.25ms) 6484 * @param conn_interval_max (unit: 1.25ms) 6485 * @param conn_latency 6486 * @param supervision_timeout (unit: 10ms) 6487 * @return 0 if ok 6488 */ 6489 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6490 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6491 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6492 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6493 connection->le_conn_interval_min = conn_interval_min; 6494 connection->le_conn_interval_max = conn_interval_max; 6495 connection->le_conn_latency = conn_latency; 6496 connection->le_supervision_timeout = supervision_timeout; 6497 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6498 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6499 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6500 return 0; 6501 } 6502 6503 #ifdef ENABLE_LE_PERIPHERAL 6504 6505 /** 6506 * @brief Set Advertisement Data 6507 * @param advertising_data_length 6508 * @param advertising_data (max 31 octets) 6509 * @note data is not copied, pointer has to stay valid 6510 */ 6511 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6512 hci_stack->le_advertisements_data_len = advertising_data_length; 6513 hci_stack->le_advertisements_data = advertising_data; 6514 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6515 hci_run(); 6516 } 6517 6518 /** 6519 * @brief Set Scan Response Data 6520 * @param advertising_data_length 6521 * @param advertising_data (max 31 octets) 6522 * @note data is not copied, pointer has to stay valid 6523 */ 6524 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6525 hci_stack->le_scan_response_data_len = scan_response_data_length; 6526 hci_stack->le_scan_response_data = scan_response_data; 6527 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6528 hci_run(); 6529 } 6530 6531 /** 6532 * @brief Set Advertisement Parameters 6533 * @param adv_int_min 6534 * @param adv_int_max 6535 * @param adv_type 6536 * @param direct_address_type 6537 * @param direct_address 6538 * @param channel_map 6539 * @param filter_policy 6540 * 6541 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6542 */ 6543 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6544 uint8_t direct_address_typ, bd_addr_t direct_address, 6545 uint8_t channel_map, uint8_t filter_policy) { 6546 6547 hci_stack->le_advertisements_interval_min = adv_int_min; 6548 hci_stack->le_advertisements_interval_max = adv_int_max; 6549 hci_stack->le_advertisements_type = adv_type; 6550 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6551 hci_stack->le_advertisements_channel_map = channel_map; 6552 hci_stack->le_advertisements_filter_policy = filter_policy; 6553 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6554 6); 6555 6556 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6557 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6558 hci_run(); 6559 } 6560 6561 /** 6562 * @brief Enable/Disable Advertisements 6563 * @param enabled 6564 */ 6565 void gap_advertisements_enable(int enabled){ 6566 if (enabled == 0){ 6567 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6568 } else { 6569 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6570 } 6571 hci_update_advertisements_enabled_for_current_roles(); 6572 hci_run(); 6573 } 6574 6575 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6576 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6577 btstack_linked_list_iterator_t it; 6578 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6579 while (btstack_linked_list_iterator_has_next(&it)){ 6580 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6581 if ( item->advertising_handle == advertising_handle ) { 6582 return item; 6583 } 6584 } 6585 return NULL; 6586 } 6587 6588 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6589 // find free advertisement handle 6590 uint8_t advertisement_handle; 6591 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6592 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6593 } 6594 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6595 // clear 6596 memset(storage, 0, sizeof(le_advertising_set_t)); 6597 // copy params 6598 memcpy(&storage->params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6599 // add to list 6600 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6601 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6602 // set tasks and start 6603 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6604 hci_run(); 6605 return ERROR_CODE_SUCCESS; 6606 } 6607 6608 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6609 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6610 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6611 memcpy(&advertising_set->params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6612 // set tasks and start 6613 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6614 hci_run(); 6615 return ERROR_CODE_SUCCESS; 6616 } 6617 6618 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6619 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6620 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6621 memcpy(advertising_parameters, &advertising_set->params, sizeof(le_extended_advertising_parameters_t)); 6622 return ERROR_CODE_SUCCESS; 6623 } 6624 6625 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6626 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6627 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6628 memcpy(advertising_set->random_address, random_address, 6); 6629 // set tasks and start 6630 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6631 hci_run(); 6632 return ERROR_CODE_SUCCESS; 6633 } 6634 6635 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, uint8_t * advertising_data){ 6636 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6637 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6638 advertising_set->adv_data = advertising_data; 6639 advertising_set->adv_data_len = advertising_data_length; 6640 // set tasks and start 6641 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6642 hci_run(); 6643 return ERROR_CODE_SUCCESS; 6644 } 6645 6646 uint8_t gap_extended_advertising_set_scan_response_data(uint8_t advertising_handle, uint16_t scan_response_data_length, uint8_t * scan_response_data){ 6647 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6648 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6649 advertising_set->scan_data = scan_response_data; 6650 advertising_set->scan_data_len = scan_response_data_length; 6651 // set tasks and start 6652 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6653 hci_run(); 6654 return ERROR_CODE_SUCCESS; 6655 } 6656 6657 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6658 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6659 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6660 advertising_set->enable_timeout = timeout; 6661 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6662 // set tasks and start 6663 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6664 hci_run(); 6665 return ERROR_CODE_SUCCESS; 6666 } 6667 6668 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6669 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6670 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6671 // set tasks and start 6672 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6673 hci_run(); 6674 return ERROR_CODE_SUCCESS; 6675 } 6676 6677 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 6678 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6679 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6680 // set tasks and start 6681 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 6682 hci_run(); 6683 return ERROR_CODE_SUCCESS; 6684 } 6685 #endif 6686 6687 #endif 6688 6689 void hci_le_set_own_address_type(uint8_t own_address_type){ 6690 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6691 if (own_address_type == hci_stack->le_own_addr_type) return; 6692 hci_stack->le_own_addr_type = own_address_type; 6693 6694 #ifdef ENABLE_LE_PERIPHERAL 6695 // update advertisement parameters, too 6696 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6697 hci_run(); 6698 #endif 6699 #ifdef ENABLE_LE_CENTRAL 6700 // note: we don't update scan parameters or modify ongoing connection attempts 6701 #endif 6702 } 6703 6704 void hci_le_random_address_set(const bd_addr_t random_address){ 6705 memcpy(hci_stack->le_random_address, random_address, 6); 6706 hci_stack->le_random_address_set = true; 6707 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6708 hci_run(); 6709 } 6710 6711 #endif 6712 6713 uint8_t gap_disconnect(hci_con_handle_t handle){ 6714 hci_connection_t * conn = hci_connection_for_handle(handle); 6715 if (!conn){ 6716 hci_emit_disconnection_complete(handle, 0); 6717 return 0; 6718 } 6719 // ignore if already disconnected 6720 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6721 return 0; 6722 } 6723 conn->state = SEND_DISCONNECT; 6724 hci_run(); 6725 return 0; 6726 } 6727 6728 int gap_read_rssi(hci_con_handle_t con_handle){ 6729 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6730 if (hci_connection == NULL) return 0; 6731 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6732 hci_run(); 6733 return 1; 6734 } 6735 6736 /** 6737 * @brief Get connection type 6738 * @param con_handle 6739 * @result connection_type 6740 */ 6741 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6742 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6743 if (!conn) return GAP_CONNECTION_INVALID; 6744 switch (conn->address_type){ 6745 case BD_ADDR_TYPE_LE_PUBLIC: 6746 case BD_ADDR_TYPE_LE_RANDOM: 6747 return GAP_CONNECTION_LE; 6748 case BD_ADDR_TYPE_SCO: 6749 return GAP_CONNECTION_SCO; 6750 case BD_ADDR_TYPE_ACL: 6751 return GAP_CONNECTION_ACL; 6752 default: 6753 return GAP_CONNECTION_INVALID; 6754 } 6755 } 6756 6757 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6758 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6759 if (!conn) return HCI_ROLE_INVALID; 6760 return (hci_role_t) conn->role; 6761 } 6762 6763 6764 #ifdef ENABLE_CLASSIC 6765 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6766 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6767 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6768 conn->request_role = role; 6769 hci_run(); 6770 return ERROR_CODE_SUCCESS; 6771 } 6772 #endif 6773 6774 #ifdef ENABLE_BLE 6775 6776 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){ 6777 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6778 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6779 6780 conn->le_phy_update_all_phys = all_phys; 6781 conn->le_phy_update_tx_phys = tx_phys; 6782 conn->le_phy_update_rx_phys = rx_phys; 6783 conn->le_phy_update_phy_options = phy_options; 6784 6785 hci_run(); 6786 6787 return 0; 6788 } 6789 6790 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6791 // check if already in list 6792 btstack_linked_list_iterator_t it; 6793 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6794 while (btstack_linked_list_iterator_has_next(&it)) { 6795 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6796 if (entry->address_type != address_type) { 6797 continue; 6798 } 6799 if (memcmp(entry->address, address, 6) != 0) { 6800 continue; 6801 } 6802 // disallow if already scheduled to add 6803 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6804 return ERROR_CODE_COMMAND_DISALLOWED; 6805 } 6806 // still on controller, but scheduled to remove -> re-add 6807 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6808 return ERROR_CODE_SUCCESS; 6809 } 6810 // alloc and add to list 6811 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6812 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6813 entry->address_type = address_type; 6814 (void)memcpy(entry->address, address, 6); 6815 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6816 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6817 return ERROR_CODE_SUCCESS; 6818 } 6819 6820 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6821 btstack_linked_list_iterator_t it; 6822 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6823 while (btstack_linked_list_iterator_has_next(&it)){ 6824 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6825 if (entry->address_type != address_type) { 6826 continue; 6827 } 6828 if (memcmp(entry->address, address, 6) != 0) { 6829 continue; 6830 } 6831 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6832 // remove from controller if already present 6833 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6834 } else { 6835 // directly remove entry from whitelist 6836 btstack_linked_list_iterator_remove(&it); 6837 btstack_memory_whitelist_entry_free(entry); 6838 } 6839 return ERROR_CODE_SUCCESS; 6840 } 6841 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6842 } 6843 6844 static void hci_whitelist_clear(void){ 6845 btstack_linked_list_iterator_t it; 6846 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6847 while (btstack_linked_list_iterator_has_next(&it)){ 6848 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6849 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6850 // remove from controller if already present 6851 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6852 continue; 6853 } 6854 // directly remove entry from whitelist 6855 btstack_linked_list_iterator_remove(&it); 6856 btstack_memory_whitelist_entry_free(entry); 6857 } 6858 } 6859 6860 // free all entries unconditionally 6861 static void hci_whitelist_free(void){ 6862 btstack_linked_list_iterator_t lit; 6863 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6864 while (btstack_linked_list_iterator_has_next(&lit)){ 6865 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6866 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6867 btstack_memory_whitelist_entry_free(entry); 6868 } 6869 } 6870 6871 /** 6872 * @brief Clear Whitelist 6873 * @return 0 if ok 6874 */ 6875 uint8_t gap_whitelist_clear(void){ 6876 hci_whitelist_clear(); 6877 hci_run(); 6878 return ERROR_CODE_SUCCESS; 6879 } 6880 6881 /** 6882 * @brief Add Device to Whitelist 6883 * @param address_typ 6884 * @param address 6885 * @return 0 if ok 6886 */ 6887 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6888 uint8_t status = hci_whitelist_add(address_type, address); 6889 if (status){ 6890 return status; 6891 } 6892 hci_run(); 6893 return ERROR_CODE_SUCCESS; 6894 } 6895 6896 /** 6897 * @brief Remove Device from Whitelist 6898 * @param address_typ 6899 * @param address 6900 * @return 0 if ok 6901 */ 6902 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6903 uint8_t status = hci_whitelist_remove(address_type, address); 6904 if (status){ 6905 return status; 6906 } 6907 hci_run(); 6908 return ERROR_CODE_SUCCESS; 6909 } 6910 6911 #ifdef ENABLE_LE_CENTRAL 6912 /** 6913 * @brief Connect with Whitelist 6914 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6915 * @return - if ok 6916 */ 6917 uint8_t gap_connect_with_whitelist(void){ 6918 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6919 return ERROR_CODE_COMMAND_DISALLOWED; 6920 } 6921 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6922 hci_run(); 6923 return ERROR_CODE_SUCCESS; 6924 } 6925 6926 /** 6927 * @brief Auto Connection Establishment - Start Connecting to device 6928 * @param address_typ 6929 * @param address 6930 * @return 0 if ok 6931 */ 6932 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6933 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6934 return ERROR_CODE_COMMAND_DISALLOWED; 6935 } 6936 6937 uint8_t status = hci_whitelist_add(address_type, address); 6938 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6939 return status; 6940 } 6941 6942 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6943 6944 hci_run(); 6945 return ERROR_CODE_SUCCESS; 6946 } 6947 6948 /** 6949 * @brief Auto Connection Establishment - Stop Connecting to device 6950 * @param address_typ 6951 * @param address 6952 * @return 0 if ok 6953 */ 6954 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6955 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6956 return ERROR_CODE_COMMAND_DISALLOWED; 6957 } 6958 6959 hci_whitelist_remove(address_type, address); 6960 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6961 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6962 } 6963 hci_run(); 6964 return 0; 6965 } 6966 6967 /** 6968 * @brief Auto Connection Establishment - Stop everything 6969 * @note Convenience function to stop all active auto connection attempts 6970 */ 6971 uint8_t gap_auto_connection_stop_all(void){ 6972 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6973 return ERROR_CODE_COMMAND_DISALLOWED; 6974 } 6975 hci_whitelist_clear(); 6976 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6977 hci_run(); 6978 return ERROR_CODE_SUCCESS; 6979 } 6980 6981 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6982 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6983 if (!conn) return 0; 6984 return conn->le_connection_interval; 6985 } 6986 #endif 6987 #endif 6988 6989 #ifdef ENABLE_CLASSIC 6990 /** 6991 * @brief Set Extended Inquiry Response data 6992 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6993 * @note has to be done before stack starts up 6994 */ 6995 void gap_set_extended_inquiry_response(const uint8_t * data){ 6996 hci_stack->eir_data = data; 6997 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6998 hci_run(); 6999 } 7000 7001 /** 7002 * @brief Start GAP Classic Inquiry 7003 * @param duration in 1.28s units 7004 * @return 0 if ok 7005 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7006 */ 7007 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7008 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7009 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7010 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7011 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7012 } 7013 hci_stack->inquiry_state = duration_in_1280ms_units; 7014 hci_run(); 7015 return 0; 7016 } 7017 7018 /** 7019 * @brief Stop GAP Classic Inquiry 7020 * @return 0 if ok 7021 */ 7022 int gap_inquiry_stop(void){ 7023 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7024 // emit inquiry complete event, before it even started 7025 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7026 hci_emit_event(event, sizeof(event), 1); 7027 return 0; 7028 } 7029 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7030 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7031 hci_run(); 7032 return 0; 7033 } 7034 7035 void gap_inquiry_set_lap(uint32_t lap){ 7036 hci_stack->inquiry_lap = lap; 7037 } 7038 7039 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7040 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7041 hci_stack->inquiry_scan_window = inquiry_scan_window; 7042 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7043 hci_run(); 7044 } 7045 7046 7047 /** 7048 * @brief Remote Name Request 7049 * @param addr 7050 * @param page_scan_repetition_mode 7051 * @param clock_offset only used when bit 15 is set 7052 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7053 */ 7054 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7055 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7056 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7057 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7058 hci_stack->remote_name_clock_offset = clock_offset; 7059 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7060 hci_run(); 7061 return 0; 7062 } 7063 7064 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7065 hci_stack->gap_pairing_state = state; 7066 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7067 hci_run(); 7068 return 0; 7069 } 7070 7071 /** 7072 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7073 * @param addr 7074 * @param pin_data 7075 * @param pin_len 7076 * @return 0 if ok 7077 */ 7078 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7079 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7080 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7081 hci_stack->gap_pairing_pin_len = pin_len; 7082 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7083 } 7084 7085 /** 7086 * @brief Legacy Pairing Pin Code Response 7087 * @param addr 7088 * @param pin 7089 * @return 0 if ok 7090 */ 7091 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7092 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7093 } 7094 7095 /** 7096 * @brief Abort Legacy Pairing 7097 * @param addr 7098 * @param pin 7099 * @return 0 if ok 7100 */ 7101 int gap_pin_code_negative(bd_addr_t addr){ 7102 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7103 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7104 } 7105 7106 /** 7107 * @brief SSP Passkey Response 7108 * @param addr 7109 * @param passkey 7110 * @return 0 if ok 7111 */ 7112 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7113 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7114 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7115 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7116 } 7117 7118 /** 7119 * @brief Abort SSP Passkey Entry/Pairing 7120 * @param addr 7121 * @param pin 7122 * @return 0 if ok 7123 */ 7124 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7125 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7126 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7127 } 7128 7129 /** 7130 * @brief Accept SSP Numeric Comparison 7131 * @param addr 7132 * @param passkey 7133 * @return 0 if ok 7134 */ 7135 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7136 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7137 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7138 } 7139 7140 /** 7141 * @brief Abort SSP Numeric Comparison/Pairing 7142 * @param addr 7143 * @param pin 7144 * @return 0 if ok 7145 */ 7146 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7147 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7148 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7149 } 7150 7151 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7152 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7153 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7154 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7155 connectionSetAuthenticationFlags(conn, flag); 7156 hci_run(); 7157 return ERROR_CODE_SUCCESS; 7158 } 7159 #endif 7160 7161 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7162 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7163 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7164 } 7165 7166 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7167 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7168 } 7169 #endif 7170 7171 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7172 /** 7173 * @brief Report Remote OOB Data 7174 * @param bd_addr 7175 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7176 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7177 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7178 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7179 */ 7180 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){ 7181 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7182 if (connection == NULL) { 7183 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7184 } 7185 connection->classic_oob_c_192 = c_192; 7186 connection->classic_oob_r_192 = r_192; 7187 7188 // ignore P-256 if not supported by us 7189 if (hci_stack->secure_connections_active){ 7190 connection->classic_oob_c_256 = c_256; 7191 connection->classic_oob_r_256 = r_256; 7192 } 7193 7194 return ERROR_CODE_SUCCESS; 7195 } 7196 /** 7197 * @brief Generate new OOB data 7198 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7199 */ 7200 void gap_ssp_generate_oob_data(void){ 7201 hci_stack->classic_read_local_oob_data = true; 7202 hci_run(); 7203 } 7204 7205 #endif 7206 7207 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7208 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7209 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7210 if (connection == NULL) { 7211 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7212 } 7213 7214 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7215 connection->link_key_type = type; 7216 7217 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7218 } 7219 7220 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7221 /** 7222 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7223 * @param inquiry_mode see bluetooth_defines.h 7224 */ 7225 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7226 hci_stack->inquiry_mode = inquiry_mode; 7227 } 7228 7229 /** 7230 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7231 */ 7232 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7233 hci_stack->sco_voice_setting = voice_setting; 7234 } 7235 7236 /** 7237 * @brief Get SCO Voice Setting 7238 * @return current voice setting 7239 */ 7240 uint16_t hci_get_sco_voice_setting(void){ 7241 return hci_stack->sco_voice_setting; 7242 } 7243 7244 static int hci_have_usb_transport(void){ 7245 if (!hci_stack->hci_transport) return 0; 7246 const char * transport_name = hci_stack->hci_transport->name; 7247 if (!transport_name) return 0; 7248 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7249 } 7250 7251 /** @brief Get SCO packet length for current SCO Voice setting 7252 * @note Using SCO packets of the exact length is required for USB transfer 7253 * @return Length of SCO packets in bytes (not audio frames) 7254 */ 7255 uint16_t hci_get_sco_packet_length(void){ 7256 uint16_t sco_packet_length = 0; 7257 7258 #ifdef ENABLE_SCO_OVER_HCI 7259 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7260 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7261 7262 if (hci_have_usb_transport()){ 7263 // see Core Spec for H2 USB Transfer. 7264 // 3 byte SCO header + 24 bytes per connection 7265 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7266 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7267 } else { 7268 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7269 sco_packet_length = 3 + 60 * multiplier; 7270 // assert that it still fits inside an SCO buffer 7271 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7272 sco_packet_length = 3 + 60; 7273 } 7274 } 7275 #endif 7276 7277 #ifdef HAVE_SCO_TRANSPORT 7278 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7279 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7280 sco_packet_length = 3 + 60 * multiplier; 7281 #endif 7282 return sco_packet_length; 7283 } 7284 7285 /** 7286 * @brief Sets the master/slave policy 7287 * @param policy (0: attempt to become master, 1: let connecting device decide) 7288 */ 7289 void hci_set_master_slave_policy(uint8_t policy){ 7290 hci_stack->master_slave_policy = policy; 7291 } 7292 7293 #endif 7294 7295 HCI_STATE hci_get_state(void){ 7296 return hci_stack->state; 7297 } 7298 7299 #ifdef ENABLE_CLASSIC 7300 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7301 hci_stack->gap_classic_accept_callback = accept_callback; 7302 } 7303 #endif 7304 7305 /** 7306 * @brief Set callback for Bluetooth Hardware Error 7307 */ 7308 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7309 hci_stack->hardware_error_callback = fn; 7310 } 7311 7312 void hci_disconnect_all(void){ 7313 btstack_linked_list_iterator_t it; 7314 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7315 while (btstack_linked_list_iterator_has_next(&it)){ 7316 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7317 if (con->state == SENT_DISCONNECT) continue; 7318 con->state = SEND_DISCONNECT; 7319 } 7320 hci_run(); 7321 } 7322 7323 uint16_t hci_get_manufacturer(void){ 7324 return hci_stack->manufacturer; 7325 } 7326 7327 #ifdef ENABLE_BLE 7328 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7329 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7330 if (!hci_con) return NULL; 7331 return &hci_con->sm_connection; 7332 } 7333 7334 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7335 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7336 #endif 7337 7338 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7339 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7340 if (hci_connection == NULL) return 0; 7341 if (hci_is_le_connection(hci_connection)){ 7342 #ifdef ENABLE_BLE 7343 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7344 if (sm_conn->sm_connection_encrypted) { 7345 return sm_conn->sm_actual_encryption_key_size; 7346 } 7347 #endif 7348 } else { 7349 #ifdef ENABLE_CLASSIC 7350 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7351 return hci_connection->encryption_key_size; 7352 } 7353 #endif 7354 } 7355 return 0; 7356 } 7357 7358 bool gap_authenticated(hci_con_handle_t con_handle){ 7359 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7360 if (hci_connection == NULL) return false; 7361 7362 switch (hci_connection->address_type){ 7363 #ifdef ENABLE_BLE 7364 case BD_ADDR_TYPE_LE_PUBLIC: 7365 case BD_ADDR_TYPE_LE_RANDOM: 7366 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7367 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7368 #endif 7369 #ifdef ENABLE_CLASSIC 7370 case BD_ADDR_TYPE_SCO: 7371 case BD_ADDR_TYPE_ACL: 7372 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7373 #endif 7374 default: 7375 return false; 7376 } 7377 } 7378 7379 bool gap_secure_connection(hci_con_handle_t con_handle){ 7380 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7381 if (hci_connection == NULL) return 0; 7382 7383 switch (hci_connection->address_type){ 7384 #ifdef ENABLE_BLE 7385 case BD_ADDR_TYPE_LE_PUBLIC: 7386 case BD_ADDR_TYPE_LE_RANDOM: 7387 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7388 return hci_connection->sm_connection.sm_connection_sc != 0; 7389 #endif 7390 #ifdef ENABLE_CLASSIC 7391 case BD_ADDR_TYPE_SCO: 7392 case BD_ADDR_TYPE_ACL: 7393 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7394 #endif 7395 default: 7396 return false; 7397 } 7398 } 7399 7400 bool gap_bonded(hci_con_handle_t con_handle){ 7401 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7402 if (hci_connection == NULL) return 0; 7403 7404 #ifdef ENABLE_CLASSIC 7405 link_key_t link_key; 7406 link_key_type_t link_key_type; 7407 #endif 7408 switch (hci_connection->address_type){ 7409 #ifdef ENABLE_BLE 7410 case BD_ADDR_TYPE_LE_PUBLIC: 7411 case BD_ADDR_TYPE_LE_RANDOM: 7412 return hci_connection->sm_connection.sm_le_db_index >= 0; 7413 #endif 7414 #ifdef ENABLE_CLASSIC 7415 case BD_ADDR_TYPE_SCO: 7416 case BD_ADDR_TYPE_ACL: 7417 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7418 #endif 7419 default: 7420 return false; 7421 } 7422 } 7423 7424 #ifdef ENABLE_BLE 7425 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7426 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7427 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7428 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7429 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7430 return sm_conn->sm_connection_authorization_state; 7431 } 7432 #endif 7433 7434 #ifdef ENABLE_CLASSIC 7435 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){ 7436 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7437 if (!conn) return GAP_CONNECTION_INVALID; 7438 conn->sniff_min_interval = sniff_min_interval; 7439 conn->sniff_max_interval = sniff_max_interval; 7440 conn->sniff_attempt = sniff_attempt; 7441 conn->sniff_timeout = sniff_timeout; 7442 hci_run(); 7443 return 0; 7444 } 7445 7446 /** 7447 * @brief Exit Sniff mode 7448 * @param con_handle 7449 @ @return 0 if ok 7450 */ 7451 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7452 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7453 if (!conn) return GAP_CONNECTION_INVALID; 7454 conn->sniff_min_interval = 0xffff; 7455 hci_run(); 7456 return 0; 7457 } 7458 7459 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){ 7460 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7461 if (!conn) return GAP_CONNECTION_INVALID; 7462 conn->sniff_subrating_max_latency = max_latency; 7463 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7464 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7465 hci_run(); 7466 return ERROR_CODE_SUCCESS; 7467 } 7468 7469 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){ 7470 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7471 if (!conn) return GAP_CONNECTION_INVALID; 7472 conn->qos_service_type = service_type; 7473 conn->qos_token_rate = token_rate; 7474 conn->qos_peak_bandwidth = peak_bandwidth; 7475 conn->qos_latency = latency; 7476 conn->qos_delay_variation = delay_variation; 7477 hci_run(); 7478 return ERROR_CODE_SUCCESS; 7479 } 7480 7481 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7482 hci_stack->new_page_scan_interval = page_scan_interval; 7483 hci_stack->new_page_scan_window = page_scan_window; 7484 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7485 hci_run(); 7486 } 7487 7488 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7489 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7490 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7491 hci_run(); 7492 } 7493 7494 void gap_set_page_timeout(uint16_t page_timeout){ 7495 hci_stack->page_timeout = page_timeout; 7496 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7497 hci_run(); 7498 } 7499 7500 #endif 7501 7502 void hci_halting_defer(void){ 7503 if (hci_stack->state != HCI_STATE_HALTING) return; 7504 switch (hci_stack->substate){ 7505 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 7506 case HCI_HALTING_CLOSE: 7507 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 7508 break; 7509 default: 7510 break; 7511 } 7512 } 7513 7514 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7515 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7516 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7517 if (le_device_db_index >= le_device_db_max_count()) return; 7518 uint8_t offset = le_device_db_index >> 3; 7519 uint8_t mask = 1 << (le_device_db_index & 7); 7520 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7521 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7522 // note: go back to remove entries, otherwise, a remove + add will skip the add 7523 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7524 } 7525 } 7526 7527 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7528 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7529 if (le_device_db_index >= le_device_db_max_count()) return; 7530 uint8_t offset = le_device_db_index >> 3; 7531 uint8_t mask = 1 << (le_device_db_index & 7); 7532 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7533 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7534 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7535 } 7536 } 7537 7538 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7539 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7540 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7541 } 7542 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7543 // restart le resolving list update 7544 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7545 } 7546 return ERROR_CODE_SUCCESS; 7547 } 7548 #endif 7549 7550 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7551 void hci_setup_test_connections_fuzz(void){ 7552 hci_connection_t * conn; 7553 7554 // default address: 66:55:44:33:00:01 7555 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7556 7557 // setup Controller info 7558 hci_stack->num_cmd_packets = 255; 7559 hci_stack->acl_packets_total_num = 255; 7560 7561 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7562 addr[5] = 0x01; 7563 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7564 conn->con_handle = addr[5]; 7565 conn->role = HCI_ROLE_SLAVE; 7566 conn->state = RECEIVED_CONNECTION_REQUEST; 7567 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7568 7569 // setup incoming Classic SCO connection with con handle 0x0002 7570 addr[5] = 0x02; 7571 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7572 conn->con_handle = addr[5]; 7573 conn->role = HCI_ROLE_SLAVE; 7574 conn->state = RECEIVED_CONNECTION_REQUEST; 7575 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7576 7577 // setup ready Classic ACL connection with con handle 0x0003 7578 addr[5] = 0x03; 7579 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7580 conn->con_handle = addr[5]; 7581 conn->role = HCI_ROLE_SLAVE; 7582 conn->state = OPEN; 7583 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7584 7585 // setup ready Classic SCO connection with con handle 0x0004 7586 addr[5] = 0x04; 7587 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7588 conn->con_handle = addr[5]; 7589 conn->role = HCI_ROLE_SLAVE; 7590 conn->state = OPEN; 7591 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7592 7593 // setup ready LE ACL connection with con handle 0x005 and public address 7594 addr[5] = 0x05; 7595 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7596 conn->con_handle = addr[5]; 7597 conn->role = HCI_ROLE_SLAVE; 7598 conn->state = OPEN; 7599 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7600 conn->sm_connection.sm_connection_encrypted = 1; 7601 } 7602 7603 void hci_free_connections_fuzz(void){ 7604 btstack_linked_list_iterator_t it; 7605 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7606 while (btstack_linked_list_iterator_has_next(&it)){ 7607 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7608 btstack_linked_list_iterator_remove(&it); 7609 btstack_memory_hci_connection_free(con); 7610 } 7611 } 7612 void hci_simulate_working_fuzz(void){ 7613 hci_stack->le_scanning_param_update = false; 7614 hci_init_done(); 7615 hci_stack->num_cmd_packets = 255; 7616 } 7617 #endif 7618