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 #ifdef ENABLE_LE_PERIPHERAL 217 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 218 #endif 219 #endif 220 221 // the STACK is here 222 #ifndef HAVE_MALLOC 223 static hci_stack_t hci_stack_static; 224 #endif 225 static hci_stack_t * hci_stack = NULL; 226 227 #ifdef ENABLE_CLASSIC 228 // default name 229 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 230 231 // test helper 232 static uint8_t disable_l2cap_timeouts = 0; 233 #endif 234 235 // reset connection state on create and on reconnect 236 // don't overwrite addr, con handle, role 237 static void hci_connection_init(hci_connection_t * conn){ 238 conn->authentication_flags = AUTH_FLAG_NONE; 239 conn->bonding_flags = 0; 240 conn->requested_security_level = LEVEL_0; 241 #ifdef ENABLE_CLASSIC 242 conn->request_role = HCI_ROLE_INVALID; 243 conn->sniff_subrating_max_latency = 0xffff; 244 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 245 conn->link_key_type = INVALID_LINK_KEY; 246 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 247 btstack_run_loop_set_timer_context(&conn->timeout, conn); 248 hci_connection_timestamp(conn); 249 #endif 250 conn->acl_recombination_length = 0; 251 conn->acl_recombination_pos = 0; 252 conn->num_packets_sent = 0; 253 254 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 255 #ifdef ENABLE_BLE 256 conn->le_phy_update_all_phys = 0xff; 257 #endif 258 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 259 conn->le_max_tx_octets = 27; 260 #endif 261 #ifdef ENABLE_CLASSIC_PAIRING_OOB 262 conn->classic_oob_c_192 = NULL; 263 conn->classic_oob_r_192 = NULL; 264 conn->classic_oob_c_256 = NULL; 265 conn->classic_oob_r_256 = NULL; 266 #endif 267 } 268 269 /** 270 * create connection for given address 271 * 272 * @return connection OR NULL, if no memory left 273 */ 274 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 275 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 276 277 hci_connection_t * conn = btstack_memory_hci_connection_get(); 278 if (!conn) return NULL; 279 hci_connection_init(conn); 280 281 bd_addr_copy(conn->address, addr); 282 conn->address_type = addr_type; 283 conn->con_handle = HCI_CON_HANDLE_INVALID; 284 conn->role = HCI_ROLE_INVALID; 285 286 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 287 288 return conn; 289 } 290 291 292 /** 293 * get le connection parameter range 294 * 295 * @return le connection parameter range struct 296 */ 297 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 298 *range = hci_stack->le_connection_parameter_range; 299 } 300 301 /** 302 * set le connection parameter range 303 * 304 */ 305 306 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 307 hci_stack->le_connection_parameter_range = *range; 308 } 309 310 /** 311 * @brief Test if connection parameters are inside in existing rage 312 * @param conn_interval_min (unit: 1.25ms) 313 * @param conn_interval_max (unit: 1.25ms) 314 * @param conn_latency 315 * @param supervision_timeout (unit: 10ms) 316 * @return 1 if included 317 */ 318 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){ 319 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 320 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 321 322 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 323 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 324 325 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 326 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 327 328 return 1; 329 } 330 331 /** 332 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 333 * @note: default: 1 334 * @param max_peripheral_connections 335 */ 336 #ifdef ENABLE_LE_PERIPHERAL 337 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 338 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 339 } 340 #endif 341 342 /** 343 * get hci connections iterator 344 * 345 * @return hci connections iterator 346 */ 347 348 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 349 btstack_linked_list_iterator_init(it, &hci_stack->connections); 350 } 351 352 /** 353 * get connection for a given handle 354 * 355 * @return connection OR NULL, if not found 356 */ 357 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 358 btstack_linked_list_iterator_t it; 359 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 360 while (btstack_linked_list_iterator_has_next(&it)){ 361 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 362 if ( item->con_handle == con_handle ) { 363 return item; 364 } 365 } 366 return NULL; 367 } 368 369 /** 370 * get connection for given address 371 * 372 * @return connection OR NULL, if not found 373 */ 374 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 375 btstack_linked_list_iterator_t it; 376 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 377 while (btstack_linked_list_iterator_has_next(&it)){ 378 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 379 if (connection->address_type != addr_type) continue; 380 if (memcmp(addr, connection->address, 6) != 0) continue; 381 return connection; 382 } 383 return NULL; 384 } 385 386 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 387 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 388 } 389 390 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 391 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 392 } 393 394 #ifdef ENABLE_CLASSIC 395 396 #ifdef ENABLE_SCO_OVER_HCI 397 static int hci_number_sco_connections(void){ 398 int connections = 0; 399 btstack_linked_list_iterator_t it; 400 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 401 while (btstack_linked_list_iterator_has_next(&it)){ 402 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 403 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 404 connections++; 405 } 406 return connections; 407 } 408 #endif 409 410 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 411 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 412 #ifdef HAVE_EMBEDDED_TICK 413 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 414 // connections might be timed out 415 hci_emit_l2cap_check_timeout(connection); 416 } 417 #else 418 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 419 // connections might be timed out 420 hci_emit_l2cap_check_timeout(connection); 421 } 422 #endif 423 } 424 425 static void hci_connection_timestamp(hci_connection_t *connection){ 426 #ifdef HAVE_EMBEDDED_TICK 427 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 428 #else 429 connection->timestamp = btstack_run_loop_get_time_ms(); 430 #endif 431 } 432 433 /** 434 * add authentication flags and reset timer 435 * @note: assumes classic connection 436 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 437 */ 438 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 439 bd_addr_t addr; 440 reverse_bd_addr(bd_addr, addr); 441 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 442 if (conn) { 443 connectionSetAuthenticationFlags(conn, flags); 444 hci_connection_timestamp(conn); 445 } 446 } 447 448 static bool hci_pairing_active(hci_connection_t * hci_connection){ 449 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 450 } 451 452 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 453 if (hci_pairing_active(hci_connection)) return; 454 if (ssp){ 455 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 456 } else { 457 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 458 } 459 // if we are initiator, we have sent an HCI Authenticate Request 460 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 461 462 // if we are responder, use minimal service security level as required level 463 if (!initiator){ 464 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); 465 } 466 467 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 468 469 uint8_t event[12]; 470 event[0] = GAP_EVENT_PAIRING_STARTED; 471 event[1] = 10; 472 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 473 reverse_bd_addr(hci_connection->address, &event[4]); 474 event[10] = (uint8_t) ssp; 475 event[11] = (uint8_t) initiator; 476 hci_emit_event(event, sizeof(event), 1); 477 } 478 479 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 480 hci_connection->requested_security_level = LEVEL_0; 481 if (!hci_pairing_active(hci_connection)) return; 482 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 483 #ifdef ENABLE_CLASSIC_PAIRING_OOB 484 hci_connection->classic_oob_c_192 = NULL; 485 hci_connection->classic_oob_r_192 = NULL; 486 hci_connection->classic_oob_c_256 = NULL; 487 hci_connection->classic_oob_r_256 = NULL; 488 #endif 489 log_info("pairing complete, status %02x", status); 490 491 uint8_t event[11]; 492 event[0] = GAP_EVENT_PAIRING_COMPLETE; 493 event[1] = 9; 494 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 495 reverse_bd_addr(hci_connection->address, &event[4]); 496 event[10] = status; 497 hci_emit_event(event, sizeof(event), 1); 498 } 499 500 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 501 hci_connection_t * conn = hci_connection_for_handle(handle); 502 if (!conn) return false; 503 return hci_pairing_active(conn); 504 } 505 506 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 507 if (!hci_stack->link_key_db) return; 508 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 509 hci_stack->link_key_db->delete_link_key(addr); 510 } 511 512 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 513 if (!hci_stack->link_key_db) return; 514 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 515 hci_stack->link_key_db->put_link_key(addr, link_key, type); 516 } 517 518 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 519 if (!hci_stack->link_key_db) return false; 520 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 521 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 522 return result; 523 } 524 525 void gap_delete_all_link_keys(void){ 526 bd_addr_t addr; 527 link_key_t link_key; 528 link_key_type_t type; 529 btstack_link_key_iterator_t it; 530 int ok = gap_link_key_iterator_init(&it); 531 if (!ok) { 532 log_error("could not initialize iterator"); 533 return; 534 } 535 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 536 gap_drop_link_key_for_bd_addr(addr); 537 } 538 gap_link_key_iterator_done(&it); 539 } 540 541 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 542 if (!hci_stack->link_key_db) return 0; 543 if (!hci_stack->link_key_db->iterator_init) return 0; 544 return hci_stack->link_key_db->iterator_init(it); 545 } 546 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){ 547 if (!hci_stack->link_key_db) return 0; 548 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 549 } 550 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 551 if (!hci_stack->link_key_db) return; 552 hci_stack->link_key_db->iterator_done(it); 553 } 554 #endif 555 556 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 557 switch (address_type){ 558 case BD_ADDR_TYPE_LE_PUBLIC: 559 case BD_ADDR_TYPE_LE_RANDOM: 560 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 561 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 562 return true; 563 default: 564 return false; 565 } 566 } 567 568 static int hci_is_le_connection(hci_connection_t * connection){ 569 return hci_is_le_connection_type(connection->address_type); 570 } 571 572 /** 573 * count connections 574 */ 575 static int nr_hci_connections(void){ 576 int count = 0; 577 btstack_linked_item_t *it; 578 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 579 count++; 580 } 581 return count; 582 } 583 584 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 585 586 unsigned int num_packets_sent_classic = 0; 587 unsigned int num_packets_sent_le = 0; 588 589 btstack_linked_item_t *it; 590 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 591 hci_connection_t * connection = (hci_connection_t *) it; 592 if (hci_is_le_connection(connection)){ 593 num_packets_sent_le += connection->num_packets_sent; 594 } 595 if (connection->address_type == BD_ADDR_TYPE_ACL){ 596 num_packets_sent_classic += connection->num_packets_sent; 597 } 598 } 599 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 600 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 601 int free_slots_le = 0; 602 603 if (free_slots_classic < 0){ 604 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); 605 return 0; 606 } 607 608 if (hci_stack->le_acl_packets_total_num){ 609 // if we have LE slots, they are used 610 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 611 if (free_slots_le < 0){ 612 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); 613 return 0; 614 } 615 } else { 616 // otherwise, classic slots are used for LE, too 617 free_slots_classic -= num_packets_sent_le; 618 if (free_slots_classic < 0){ 619 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); 620 return 0; 621 } 622 } 623 624 switch (address_type){ 625 case BD_ADDR_TYPE_UNKNOWN: 626 log_error("hci_number_free_acl_slots: unknown address type"); 627 return 0; 628 629 case BD_ADDR_TYPE_ACL: 630 return (uint16_t) free_slots_classic; 631 632 default: 633 if (hci_stack->le_acl_packets_total_num > 0){ 634 return (uint16_t) free_slots_le; 635 } 636 return (uint16_t) free_slots_classic; 637 } 638 } 639 640 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 641 // get connection type 642 hci_connection_t * connection = hci_connection_for_handle(con_handle); 643 if (!connection){ 644 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 645 return 0; 646 } 647 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 648 } 649 650 #ifdef ENABLE_CLASSIC 651 static int hci_number_free_sco_slots(void){ 652 unsigned int num_sco_packets_sent = 0; 653 btstack_linked_item_t *it; 654 if (hci_stack->synchronous_flow_control_enabled){ 655 // explicit flow control 656 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 657 hci_connection_t * connection = (hci_connection_t *) it; 658 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 659 num_sco_packets_sent += connection->num_packets_sent; 660 } 661 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 662 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 663 return 0; 664 } 665 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 666 } else { 667 // implicit flow control -- TODO 668 int num_ready = 0; 669 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 670 hci_connection_t * connection = (hci_connection_t *) it; 671 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 672 if (connection->sco_tx_ready == 0) continue; 673 num_ready++; 674 } 675 return num_ready; 676 } 677 } 678 #endif 679 680 // only used to send HCI Host Number Completed Packets 681 static int hci_can_send_comand_packet_transport(void){ 682 if (hci_stack->hci_packet_buffer_reserved) return 0; 683 684 // check for async hci transport implementations 685 if (hci_stack->hci_transport->can_send_packet_now){ 686 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 687 return 0; 688 } 689 } 690 return 1; 691 } 692 693 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 694 bool hci_can_send_command_packet_now(void){ 695 if (hci_can_send_comand_packet_transport() == 0) return false; 696 return hci_stack->num_cmd_packets > 0u; 697 } 698 699 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 700 // check for async hci transport implementations 701 if (!hci_stack->hci_transport->can_send_packet_now) return true; 702 return hci_stack->hci_transport->can_send_packet_now(packet_type); 703 } 704 705 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 706 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 707 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 708 } 709 710 bool hci_can_send_acl_le_packet_now(void){ 711 if (hci_stack->hci_packet_buffer_reserved) return false; 712 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 713 } 714 715 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 716 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 717 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 718 } 719 720 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 721 if (hci_stack->hci_packet_buffer_reserved) return false; 722 return hci_can_send_prepared_acl_packet_now(con_handle); 723 } 724 725 #ifdef ENABLE_CLASSIC 726 bool hci_can_send_acl_classic_packet_now(void){ 727 if (hci_stack->hci_packet_buffer_reserved) return false; 728 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 729 } 730 731 bool hci_can_send_prepared_sco_packet_now(void){ 732 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 733 if (hci_have_usb_transport()){ 734 return hci_stack->sco_can_send_now; 735 } else { 736 return hci_number_free_sco_slots() > 0; 737 } 738 } 739 740 bool hci_can_send_sco_packet_now(void){ 741 if (hci_stack->hci_packet_buffer_reserved) return false; 742 return hci_can_send_prepared_sco_packet_now(); 743 } 744 745 void hci_request_sco_can_send_now_event(void){ 746 hci_stack->sco_waiting_for_can_send_now = 1; 747 hci_notify_if_sco_can_send_now(); 748 } 749 #endif 750 751 // used for internal checks in l2cap.c 752 bool hci_is_packet_buffer_reserved(void){ 753 return hci_stack->hci_packet_buffer_reserved; 754 } 755 756 // reserves outgoing packet buffer. 757 // @return 1 if successful 758 bool hci_reserve_packet_buffer(void){ 759 if (hci_stack->hci_packet_buffer_reserved) { 760 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 761 return false; 762 } 763 hci_stack->hci_packet_buffer_reserved = true; 764 return true; 765 } 766 767 void hci_release_packet_buffer(void){ 768 hci_stack->hci_packet_buffer_reserved = false; 769 } 770 771 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 772 static int hci_transport_synchronous(void){ 773 return hci_stack->hci_transport->can_send_packet_now == NULL; 774 } 775 776 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 777 778 // 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); 779 780 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 781 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 782 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 783 max_acl_data_packet_length = hci_stack->le_data_packets_length; 784 } 785 786 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 787 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 788 max_acl_data_packet_length = connection->le_max_tx_octets; 789 } 790 #endif 791 792 log_debug("hci_send_acl_packet_fragments entered"); 793 794 uint8_t status = ERROR_CODE_SUCCESS; 795 // multiple packets could be send on a synchronous HCI transport 796 while (true){ 797 798 log_debug("hci_send_acl_packet_fragments loop entered"); 799 800 // get current data 801 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 802 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 803 bool more_fragments = false; 804 805 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 806 if (current_acl_data_packet_length > max_acl_data_packet_length){ 807 more_fragments = true; 808 current_acl_data_packet_length = max_acl_data_packet_length; 809 } 810 811 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 812 if (acl_header_pos > 0u){ 813 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 814 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 815 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 816 } 817 818 // update header len 819 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 820 821 // count packet 822 connection->num_packets_sent++; 823 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 824 825 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 826 if (more_fragments){ 827 // update start of next fragment to send 828 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 829 } else { 830 // done 831 hci_stack->acl_fragmentation_pos = 0; 832 hci_stack->acl_fragmentation_total_size = 0; 833 } 834 835 // send packet 836 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 837 const int size = current_acl_data_packet_length + 4; 838 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 839 hci_stack->acl_fragmentation_tx_active = 1; 840 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 841 if (err != 0){ 842 // no error from HCI Transport expected 843 status = ERROR_CODE_HARDWARE_FAILURE; 844 } 845 846 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 847 848 // done yet? 849 if (!more_fragments) break; 850 851 // can send more? 852 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 853 } 854 855 log_debug("hci_send_acl_packet_fragments loop over"); 856 857 // release buffer now for synchronous transport 858 if (hci_transport_synchronous()){ 859 hci_stack->acl_fragmentation_tx_active = 0; 860 hci_release_packet_buffer(); 861 hci_emit_transport_packet_sent(); 862 } 863 864 return status; 865 } 866 867 // pre: caller has reserved the packet buffer 868 uint8_t hci_send_acl_packet_buffer(int size){ 869 btstack_assert(hci_stack->hci_packet_buffer_reserved); 870 871 uint8_t * packet = hci_stack->hci_packet_buffer; 872 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 873 874 // check for free places on Bluetooth module 875 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 876 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 877 hci_release_packet_buffer(); 878 hci_emit_transport_packet_sent(); 879 return BTSTACK_ACL_BUFFERS_FULL; 880 } 881 882 hci_connection_t *connection = hci_connection_for_handle( con_handle); 883 if (!connection) { 884 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 885 hci_release_packet_buffer(); 886 hci_emit_transport_packet_sent(); 887 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 888 } 889 890 #ifdef ENABLE_CLASSIC 891 hci_connection_timestamp(connection); 892 #endif 893 894 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 895 896 // setup data 897 hci_stack->acl_fragmentation_total_size = size; 898 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 899 900 return hci_send_acl_packet_fragments(connection); 901 } 902 903 #ifdef ENABLE_CLASSIC 904 // pre: caller has reserved the packet buffer 905 uint8_t hci_send_sco_packet_buffer(int size){ 906 btstack_assert(hci_stack->hci_packet_buffer_reserved); 907 908 uint8_t * packet = hci_stack->hci_packet_buffer; 909 910 // skip checks in loopback mode 911 if (!hci_stack->loopback_mode){ 912 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 913 914 // check for free places on Bluetooth module 915 if (!hci_can_send_prepared_sco_packet_now()) { 916 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 917 hci_release_packet_buffer(); 918 hci_emit_transport_packet_sent(); 919 return BTSTACK_ACL_BUFFERS_FULL; 920 } 921 922 // track send packet in connection struct 923 hci_connection_t *connection = hci_connection_for_handle( con_handle); 924 if (!connection) { 925 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 926 hci_release_packet_buffer(); 927 hci_emit_transport_packet_sent(); 928 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 929 } 930 931 if (hci_have_usb_transport()){ 932 // token used 933 hci_stack->sco_can_send_now = false; 934 } else { 935 if (hci_stack->synchronous_flow_control_enabled){ 936 connection->num_packets_sent++; 937 } else { 938 connection->sco_tx_ready--; 939 } 940 } 941 } 942 943 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 944 945 #ifdef HAVE_SCO_TRANSPORT 946 hci_stack->sco_transport->send_packet(packet, size); 947 hci_release_packet_buffer(); 948 hci_emit_transport_packet_sent(); 949 950 return 0; 951 #else 952 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 953 if (hci_transport_synchronous()){ 954 hci_release_packet_buffer(); 955 hci_emit_transport_packet_sent(); 956 } 957 958 if (err != 0){ 959 return ERROR_CODE_HARDWARE_FAILURE; 960 } 961 return ERROR_CODE_SUCCESS; 962 #endif 963 } 964 #endif 965 966 static void acl_handler(uint8_t *packet, uint16_t size){ 967 968 // get info 969 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 970 hci_connection_t *conn = hci_connection_for_handle(con_handle); 971 uint8_t acl_flags = READ_ACL_FLAGS(packet); 972 uint16_t acl_length = READ_ACL_LENGTH(packet); 973 974 // ignore non-registered handle 975 if (!conn){ 976 log_error("acl_handler called with non-registered handle %u!" , con_handle); 977 return; 978 } 979 980 // assert packet is complete 981 if ((acl_length + 4u) != size){ 982 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 983 return; 984 } 985 986 #ifdef ENABLE_CLASSIC 987 // update idle timestamp 988 hci_connection_timestamp(conn); 989 #endif 990 991 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 992 hci_stack->host_completed_packets = 1; 993 conn->num_packets_completed++; 994 #endif 995 996 // handle different packet types 997 switch (acl_flags & 0x03u) { 998 999 case 0x01: // continuation fragment 1000 1001 // sanity checks 1002 if (conn->acl_recombination_pos == 0u) { 1003 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1004 return; 1005 } 1006 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1007 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1008 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1009 conn->acl_recombination_pos = 0; 1010 return; 1011 } 1012 1013 // append fragment payload (header already stored) 1014 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1015 &packet[4], acl_length); 1016 conn->acl_recombination_pos += acl_length; 1017 1018 // forward complete L2CAP packet if complete. 1019 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1020 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1021 // reset recombination buffer 1022 conn->acl_recombination_length = 0; 1023 conn->acl_recombination_pos = 0; 1024 } 1025 break; 1026 1027 case 0x02: { // first fragment 1028 1029 // sanity check 1030 if (conn->acl_recombination_pos) { 1031 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1032 conn->acl_recombination_pos = 0; 1033 } 1034 1035 // peek into L2CAP packet! 1036 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1037 1038 // compare fragment size to L2CAP packet size 1039 if (acl_length >= (l2cap_length + 4u)){ 1040 // forward fragment as L2CAP packet 1041 hci_emit_acl_packet(packet, acl_length + 4u); 1042 } else { 1043 1044 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1045 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1046 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1047 return; 1048 } 1049 1050 // store first fragment and tweak acl length for complete package 1051 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1052 packet, acl_length + 4u); 1053 conn->acl_recombination_pos = acl_length + 4u; 1054 conn->acl_recombination_length = l2cap_length; 1055 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1056 } 1057 break; 1058 1059 } 1060 default: 1061 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1062 return; 1063 } 1064 1065 // execute main loop 1066 hci_run(); 1067 } 1068 1069 static void hci_connection_stop_timer(hci_connection_t * conn){ 1070 btstack_run_loop_remove_timer(&conn->timeout); 1071 #ifdef ENABLE_CLASSIC 1072 btstack_run_loop_remove_timer(&conn->timeout_sco); 1073 #endif 1074 } 1075 1076 static void hci_shutdown_connection(hci_connection_t *conn){ 1077 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1078 1079 #ifdef ENABLE_CLASSIC 1080 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1081 bd_addr_type_t addr_type = conn->address_type; 1082 #endif 1083 #ifdef HAVE_SCO_TRANSPORT 1084 hci_con_handle_t con_handle = conn->con_handle; 1085 #endif 1086 #endif 1087 1088 hci_connection_stop_timer(conn); 1089 1090 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1091 btstack_memory_hci_connection_free( conn ); 1092 1093 // now it's gone 1094 hci_emit_nr_connections_changed(); 1095 1096 #ifdef ENABLE_CLASSIC 1097 #ifdef ENABLE_SCO_OVER_HCI 1098 // update SCO 1099 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1100 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1101 } 1102 #endif 1103 #ifdef HAVE_SCO_TRANSPORT 1104 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1105 hci_stack->sco_transport->close(con_handle); 1106 } 1107 #endif 1108 #endif 1109 } 1110 1111 #ifdef ENABLE_CLASSIC 1112 1113 static const uint16_t packet_type_sizes[] = { 1114 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1115 HCI_ACL_DH1_SIZE, 0, 0, 0, 1116 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1117 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1118 }; 1119 static const uint8_t packet_type_feature_requirement_bit[] = { 1120 0, // 3 slot packets 1121 1, // 5 slot packets 1122 25, // EDR 2 mpbs 1123 26, // EDR 3 mbps 1124 39, // 3 slot EDR packts 1125 40, // 5 slot EDR packet 1126 }; 1127 static const uint16_t packet_type_feature_packet_mask[] = { 1128 0x0f00, // 3 slot packets 1129 0xf000, // 5 slot packets 1130 0x1102, // EDR 2 mpbs 1131 0x2204, // EDR 3 mbps 1132 0x0300, // 3 slot EDR packts 1133 0x3000, // 5 slot EDR packet 1134 }; 1135 1136 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1137 // enable packet types based on size 1138 uint16_t packet_types = 0; 1139 unsigned int i; 1140 for (i=0;i<16;i++){ 1141 if (packet_type_sizes[i] == 0) continue; 1142 if (packet_type_sizes[i] <= buffer_size){ 1143 packet_types |= 1 << i; 1144 } 1145 } 1146 // disable packet types due to missing local supported features 1147 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1148 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1149 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1150 if (feature_set) continue; 1151 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1152 packet_types &= ~packet_type_feature_packet_mask[i]; 1153 } 1154 // flip bits for "may not be used" 1155 packet_types ^= 0x3306; 1156 return packet_types; 1157 } 1158 1159 uint16_t hci_usable_acl_packet_types(void){ 1160 return hci_stack->packet_types; 1161 } 1162 #endif 1163 1164 uint8_t* hci_get_outgoing_packet_buffer(void){ 1165 // hci packet buffer is >= acl data packet length 1166 return hci_stack->hci_packet_buffer; 1167 } 1168 1169 uint16_t hci_max_acl_data_packet_length(void){ 1170 return hci_stack->acl_data_packet_length; 1171 } 1172 1173 #ifdef ENABLE_CLASSIC 1174 bool hci_extended_sco_link_supported(void){ 1175 // No. 31, byte 3, bit 7 1176 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1177 } 1178 #endif 1179 1180 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1181 // No. 54, byte 6, bit 6 1182 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1183 } 1184 1185 #ifdef ENABLE_CLASSIC 1186 static int gap_ssp_supported(void){ 1187 // No. 51, byte 6, bit 3 1188 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1189 } 1190 #endif 1191 1192 static int hci_classic_supported(void){ 1193 #ifdef ENABLE_CLASSIC 1194 // No. 37, byte 4, bit 5, = No BR/EDR Support 1195 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1196 #else 1197 return 0; 1198 #endif 1199 } 1200 1201 static int hci_le_supported(void){ 1202 #ifdef ENABLE_BLE 1203 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1204 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1205 #else 1206 return 0; 1207 #endif 1208 } 1209 1210 static bool hci_command_supported(uint8_t command_index){ 1211 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1212 } 1213 1214 #ifdef ENABLE_BLE 1215 1216 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1217 static bool hci_extended_advertising_supported(void){ 1218 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1219 } 1220 #endif 1221 1222 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1223 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1224 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1225 } else { 1226 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1227 } 1228 } 1229 1230 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1231 *addr_type = hci_stack->le_own_addr_type; 1232 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1233 } 1234 1235 #ifdef ENABLE_LE_PERIPHERAL 1236 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1237 *addr_type = hci_stack->le_advertisements_own_addr_type; 1238 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1239 }; 1240 #endif 1241 1242 #ifdef ENABLE_LE_CENTRAL 1243 1244 /** 1245 * @brief Get own addr type and address used for LE connections (Central) 1246 */ 1247 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1248 *addr_type = hci_stack->le_connection_own_addr_type; 1249 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1250 } 1251 1252 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1253 1254 uint16_t offset = 3; 1255 uint8_t num_reports = packet[offset]; 1256 offset += 1; 1257 1258 uint16_t i; 1259 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1260 for (i=0; (i<num_reports) && (offset < size);i++){ 1261 // sanity checks on data_length: 1262 uint8_t data_length = packet[offset + 8]; 1263 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1264 if ((offset + 9u + data_length + 1u) > size) return; 1265 // setup event 1266 uint8_t event_size = 10u + data_length; 1267 uint16_t pos = 0; 1268 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1269 event[pos++] = event_size; 1270 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1271 offset += 8; 1272 pos += 8; 1273 event[pos++] = packet[offset + 1 + data_length]; // rssi 1274 event[pos++] = data_length; 1275 offset++; 1276 (void)memcpy(&event[pos], &packet[offset], data_length); 1277 pos += data_length; 1278 offset += data_length + 1u; // rssi 1279 hci_emit_event(event, pos, 1); 1280 } 1281 } 1282 1283 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1284 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1285 uint16_t offset = 3; 1286 uint8_t num_reports = packet[offset++]; 1287 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1288 uint8_t i; 1289 for (i=0; (i<num_reports) && (offset < size);i++){ 1290 // sanity checks on data_length: 1291 uint16_t data_length = packet[offset + 23]; 1292 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1293 if ((offset + 24u + data_length) > size) return; 1294 uint16_t event_type = little_endian_read_16(packet, offset); 1295 offset += 2; 1296 if ((event_type & 0x10) != 0) { 1297 // setup legacy event 1298 uint8_t legacy_event_type; 1299 switch (event_type){ 1300 case 0b0010011: 1301 // ADV_IND 1302 legacy_event_type = 0; 1303 break; 1304 case 0b0010101: 1305 // ADV_DIRECT_IND 1306 legacy_event_type = 1; 1307 break; 1308 case 0b0010010: 1309 // ADV_SCAN_IND 1310 legacy_event_type = 2; 1311 break; 1312 case 0b0010000: 1313 // ADV_NONCONN_IND 1314 legacy_event_type = 3; 1315 break; 1316 case 0b0011011: 1317 case 0b0011010: 1318 // SCAN_RSP 1319 legacy_event_type = 4; 1320 break; 1321 default: 1322 legacy_event_type = 0; 1323 break; 1324 } 1325 uint16_t pos = 0; 1326 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1327 event[pos++] = 10u + data_length; 1328 event[pos++] = legacy_event_type; 1329 // copy address type + address 1330 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1331 offset += 7; 1332 pos += 7; 1333 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1334 offset += 4; 1335 // copy rssi 1336 event[pos++] = packet[offset++]; 1337 // skip periodic advertising interval and direct address 1338 offset += 9; 1339 // copy data len + data; 1340 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1341 pos += 1 +data_length; 1342 offset += 1+ data_length; 1343 hci_emit_event(event, pos, 1); 1344 } else { 1345 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1346 uint8_t report_len = 24 + data_length; 1347 event[1] = report_len; 1348 memcpy(&event[2], &packet[offset], report_len); 1349 offset += report_len; 1350 hci_emit_event(event, 2 + report_len, 1); 1351 } 1352 } 1353 } 1354 #endif 1355 1356 #endif 1357 #endif 1358 1359 #ifdef ENABLE_BLE 1360 #ifdef ENABLE_LE_PERIPHERAL 1361 static void hci_update_advertisements_enabled_for_current_roles(void){ 1362 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1363 // get number of active le slave connections 1364 int num_slave_connections = 0; 1365 btstack_linked_list_iterator_t it; 1366 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1367 while (btstack_linked_list_iterator_has_next(&it)){ 1368 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1369 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1370 if (con->state != OPEN) continue; 1371 if (con->role != HCI_ROLE_SLAVE) continue; 1372 if (!hci_is_le_connection(con)) continue; 1373 num_slave_connections++; 1374 } 1375 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1376 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1377 } else { 1378 hci_stack->le_advertisements_enabled_for_current_roles = false; 1379 } 1380 } 1381 #endif 1382 #endif 1383 1384 #ifdef ENABLE_CLASSIC 1385 static void gap_run_set_local_name(void){ 1386 hci_reserve_packet_buffer(); 1387 uint8_t * packet = hci_stack->hci_packet_buffer; 1388 // construct HCI Command and send 1389 uint16_t opcode = hci_write_local_name.opcode; 1390 hci_stack->last_cmd_opcode = opcode; 1391 packet[0] = opcode & 0xff; 1392 packet[1] = opcode >> 8; 1393 packet[2] = DEVICE_NAME_LEN; 1394 memset(&packet[3], 0, DEVICE_NAME_LEN); 1395 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1396 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1397 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1398 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1399 // expand '00:00:00:00:00:00' in name with bd_addr 1400 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1401 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1402 } 1403 1404 static void gap_run_set_eir_data(void){ 1405 hci_reserve_packet_buffer(); 1406 uint8_t * packet = hci_stack->hci_packet_buffer; 1407 // construct HCI Command in-place and send 1408 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1409 hci_stack->last_cmd_opcode = opcode; 1410 uint16_t offset = 0; 1411 packet[offset++] = opcode & 0xff; 1412 packet[offset++] = opcode >> 8; 1413 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1414 packet[offset++] = 0; // FEC not required 1415 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1416 if (hci_stack->eir_data){ 1417 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1418 ad_context_t context; 1419 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1420 uint8_t data_type = ad_iterator_get_data_type(&context); 1421 uint8_t size = ad_iterator_get_data_len(&context); 1422 const uint8_t *data = ad_iterator_get_data(&context); 1423 // copy item 1424 packet[offset++] = size + 1; 1425 packet[offset++] = data_type; 1426 memcpy(&packet[offset], data, size); 1427 // update name item 1428 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1429 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1430 } 1431 offset += size; 1432 } 1433 } else { 1434 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1435 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1436 packet[offset++] = bytes_to_copy + 1; 1437 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1438 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1439 // expand '00:00:00:00:00:00' in name with bd_addr 1440 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1441 } 1442 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1443 } 1444 1445 static void hci_run_gap_tasks_classic(void){ 1446 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1447 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1448 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1449 return; 1450 } 1451 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1452 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1453 gap_run_set_local_name(); 1454 return; 1455 } 1456 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1457 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1458 gap_run_set_eir_data(); 1459 return; 1460 } 1461 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1462 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1463 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1464 return; 1465 } 1466 // write page scan activity 1467 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1468 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1469 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1470 return; 1471 } 1472 // write page scan type 1473 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1474 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1475 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1476 return; 1477 } 1478 // write page timeout 1479 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1480 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1481 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1482 return; 1483 } 1484 // send scan enable 1485 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1486 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1487 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1488 return; 1489 } 1490 // send write scan activity 1491 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1492 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1493 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1494 return; 1495 } 1496 } 1497 #endif 1498 1499 #ifndef HAVE_HOST_CONTROLLER_API 1500 1501 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1502 if (!hci_stack->config) return 0; 1503 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1504 // Limit baud rate for Broadcom chipsets to 3 mbps 1505 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1506 baud_rate = 3000000; 1507 } 1508 return baud_rate; 1509 } 1510 1511 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1512 UNUSED(ds); 1513 1514 switch (hci_stack->substate){ 1515 case HCI_INIT_W4_SEND_RESET: 1516 log_info("Resend HCI Reset"); 1517 hci_stack->substate = HCI_INIT_SEND_RESET; 1518 hci_stack->num_cmd_packets = 1; 1519 hci_run(); 1520 break; 1521 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1522 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1523 if (hci_stack->hci_transport->reset_link){ 1524 hci_stack->hci_transport->reset_link(); 1525 } 1526 1527 /* fall through */ 1528 1529 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1530 log_info("Resend HCI Reset - CSR Warm Boot"); 1531 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1532 hci_stack->num_cmd_packets = 1; 1533 hci_run(); 1534 break; 1535 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1536 if (hci_stack->hci_transport->set_baudrate){ 1537 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1538 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1539 hci_stack->hci_transport->set_baudrate(baud_rate); 1540 } 1541 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1542 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1543 if (hci_stack->hci_transport->reset_link){ 1544 log_info("Link Reset"); 1545 hci_stack->hci_transport->reset_link(); 1546 } 1547 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1548 hci_run(); 1549 } 1550 break; 1551 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1552 // otherwise continue 1553 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1554 hci_send_cmd(&hci_read_local_supported_commands); 1555 break; 1556 default: 1557 break; 1558 } 1559 } 1560 #endif 1561 1562 static void hci_initializing_next_state(void){ 1563 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1564 } 1565 1566 static void hci_init_done(void){ 1567 // done. tell the app 1568 log_info("hci_init_done -> HCI_STATE_WORKING"); 1569 hci_stack->state = HCI_STATE_WORKING; 1570 hci_emit_state(); 1571 } 1572 1573 // assumption: hci_can_send_command_packet_now() == true 1574 static void hci_initializing_run(void){ 1575 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1576 1577 if (!hci_can_send_command_packet_now()) return; 1578 1579 #ifndef HAVE_HOST_CONTROLLER_API 1580 bool need_baud_change = hci_stack->config 1581 && hci_stack->chipset 1582 && hci_stack->chipset->set_baudrate_command 1583 && hci_stack->hci_transport->set_baudrate 1584 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1585 #endif 1586 1587 switch (hci_stack->substate){ 1588 case HCI_INIT_SEND_RESET: 1589 hci_state_reset(); 1590 1591 #ifndef HAVE_HOST_CONTROLLER_API 1592 // prepare reset if command complete not received in 100ms 1593 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1594 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1595 btstack_run_loop_add_timer(&hci_stack->timeout); 1596 #endif 1597 // send command 1598 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1599 hci_send_cmd(&hci_reset); 1600 break; 1601 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1602 hci_send_cmd(&hci_read_local_version_information); 1603 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1604 break; 1605 1606 #ifndef HAVE_HOST_CONTROLLER_API 1607 case HCI_INIT_SEND_READ_LOCAL_NAME: 1608 hci_send_cmd(&hci_read_local_name); 1609 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1610 break; 1611 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1612 hci_state_reset(); 1613 // prepare reset if command complete not received in 100ms 1614 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1615 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1616 btstack_run_loop_add_timer(&hci_stack->timeout); 1617 // send command 1618 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1619 hci_send_cmd(&hci_reset); 1620 break; 1621 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1622 hci_state_reset(); 1623 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1624 hci_send_cmd(&hci_reset); 1625 break; 1626 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1627 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1628 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1629 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1630 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1631 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1632 break; 1633 } 1634 case HCI_INIT_SET_BD_ADDR: 1635 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1636 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1637 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1638 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1639 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1640 break; 1641 case HCI_INIT_SEND_BAUD_CHANGE: 1642 if (need_baud_change) { 1643 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1644 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1645 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1646 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1647 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1648 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1649 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1650 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1651 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1652 btstack_run_loop_add_timer(&hci_stack->timeout); 1653 } 1654 break; 1655 } 1656 1657 /* fall through */ 1658 1659 case HCI_INIT_CUSTOM_INIT: 1660 // Custom initialization 1661 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1662 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1663 bool send_cmd = false; 1664 switch (hci_stack->chipset_result){ 1665 case BTSTACK_CHIPSET_VALID_COMMAND: 1666 send_cmd = true; 1667 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1668 break; 1669 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1670 send_cmd = true; 1671 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1672 log_info("CSR Warm Boot"); 1673 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1674 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1675 btstack_run_loop_add_timer(&hci_stack->timeout); 1676 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1677 && hci_stack->config 1678 && hci_stack->chipset 1679 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1680 && hci_stack->hci_transport->set_baudrate 1681 && hci_transport_uart_get_main_baud_rate()){ 1682 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1683 } else { 1684 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1685 } 1686 break; 1687 default: 1688 break; 1689 } 1690 1691 if (send_cmd){ 1692 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1693 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1694 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1695 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1696 break; 1697 } 1698 log_info("Init script done"); 1699 1700 // Init script download on Broadcom chipsets causes: 1701 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1702 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1703 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1704 1705 // - baud rate to reset, restore UART baud rate if needed 1706 if (need_baud_change) { 1707 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1708 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1709 hci_stack->hci_transport->set_baudrate(baud_rate); 1710 } 1711 1712 uint16_t bcm_delay_ms = 300; 1713 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1714 // -> Work around: wait here. 1715 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1716 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1717 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1718 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1719 btstack_run_loop_add_timer(&hci_stack->timeout); 1720 break; 1721 } 1722 } 1723 #endif 1724 /* fall through */ 1725 1726 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1727 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1728 hci_send_cmd(&hci_read_local_supported_commands); 1729 break; 1730 case HCI_INIT_READ_BD_ADDR: 1731 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1732 hci_send_cmd(&hci_read_bd_addr); 1733 break; 1734 case HCI_INIT_READ_BUFFER_SIZE: 1735 // only read buffer size if supported 1736 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1737 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1738 hci_send_cmd(&hci_read_buffer_size); 1739 break; 1740 } 1741 1742 /* fall through */ 1743 1744 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1745 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1746 hci_send_cmd(&hci_read_local_supported_features); 1747 break; 1748 1749 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1750 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1751 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1752 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1753 break; 1754 case HCI_INIT_HOST_BUFFER_SIZE: 1755 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1756 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1757 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1758 break; 1759 #endif 1760 1761 case HCI_INIT_SET_EVENT_MASK: 1762 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1763 if (hci_le_supported()){ 1764 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1765 } else { 1766 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1767 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1768 } 1769 break; 1770 1771 #ifdef ENABLE_CLASSIC 1772 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1773 if (hci_classic_supported() && gap_ssp_supported()){ 1774 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1775 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1776 break; 1777 } 1778 1779 /* fall through */ 1780 1781 case HCI_INIT_WRITE_INQUIRY_MODE: 1782 if (hci_classic_supported()){ 1783 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1784 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1785 break; 1786 } 1787 1788 /* fall through */ 1789 1790 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1791 // skip write secure connections host support if not supported or disabled 1792 if (hci_classic_supported() && hci_stack->secure_connections_enable 1793 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1794 hci_stack->secure_connections_active = true; 1795 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1796 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1797 break; 1798 } 1799 1800 #ifdef ENABLE_SCO_OVER_HCI 1801 /* fall through */ 1802 1803 // only sent if ENABLE_SCO_OVER_HCI is defined 1804 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1805 // skip write synchronous flow control if not supported 1806 if (hci_classic_supported() 1807 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1808 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1809 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1810 break; 1811 } 1812 /* fall through */ 1813 1814 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1815 // skip write default erroneous data reporting if not supported 1816 if (hci_classic_supported() 1817 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1818 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1819 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1820 break; 1821 } 1822 #endif 1823 1824 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1825 /* fall through */ 1826 1827 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1828 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1829 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1830 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1831 #ifdef ENABLE_SCO_OVER_HCI 1832 log_info("BCM: Route SCO data via HCI transport"); 1833 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1834 #endif 1835 #ifdef ENABLE_SCO_OVER_PCM 1836 log_info("BCM: Route SCO data via PCM interface"); 1837 #ifdef ENABLE_BCM_PCM_WBS 1838 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1839 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1840 #else 1841 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1842 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1843 #endif 1844 #endif 1845 break; 1846 } 1847 #endif 1848 1849 #ifdef ENABLE_SCO_OVER_PCM 1850 /* fall through */ 1851 1852 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1853 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1854 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1855 log_info("BCM: Config PCM interface for I2S"); 1856 #ifdef ENABLE_BCM_PCM_WBS 1857 // 512 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, 2); 1859 #else 1860 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1861 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1862 #endif 1863 break; 1864 } 1865 #endif 1866 #endif 1867 1868 #ifdef ENABLE_BLE 1869 /* fall through */ 1870 1871 // LE INIT 1872 case HCI_INIT_LE_READ_BUFFER_SIZE: 1873 if (hci_le_supported()){ 1874 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1875 hci_send_cmd(&hci_le_read_buffer_size); 1876 break; 1877 } 1878 1879 /* fall through */ 1880 1881 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1882 // skip write le host if not supported (e.g. on LE only EM9301) 1883 if (hci_le_supported() 1884 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1885 // LE Supported Host = 1, Simultaneous Host = 0 1886 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1887 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1888 break; 1889 } 1890 1891 /* fall through */ 1892 1893 case HCI_INIT_LE_SET_EVENT_MASK: 1894 if (hci_le_supported()){ 1895 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1896 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1897 break; 1898 } 1899 #endif 1900 1901 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1902 /* fall through */ 1903 1904 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1905 if (hci_le_supported() 1906 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1907 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1908 hci_send_cmd(&hci_le_read_maximum_data_length); 1909 break; 1910 } 1911 1912 /* fall through */ 1913 1914 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1915 if (hci_le_supported() 1916 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1917 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1918 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1919 break; 1920 } 1921 #endif 1922 1923 #ifdef ENABLE_LE_CENTRAL 1924 /* fall through */ 1925 1926 case HCI_INIT_READ_WHITE_LIST_SIZE: 1927 if (hci_le_supported()){ 1928 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1929 hci_send_cmd(&hci_le_read_white_list_size); 1930 break; 1931 } 1932 1933 #endif 1934 1935 #ifdef ENABLE_LE_PERIPHERAL 1936 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1937 /* fall through */ 1938 1939 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1940 if (hci_extended_advertising_supported()){ 1941 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1942 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1943 break; 1944 } 1945 #endif 1946 #endif 1947 /* fall through */ 1948 1949 case HCI_INIT_DONE: 1950 hci_stack->substate = HCI_INIT_DONE; 1951 // main init sequence complete 1952 #ifdef ENABLE_CLASSIC 1953 // check if initial Classic GAP Tasks are completed 1954 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1955 hci_run_gap_tasks_classic(); 1956 break; 1957 } 1958 #endif 1959 #ifdef ENABLE_BLE 1960 #ifdef ENABLE_LE_CENTRAL 1961 // check if initial LE GAP Tasks are completed 1962 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1963 hci_run_general_gap_le(); 1964 break; 1965 } 1966 #endif 1967 #endif 1968 hci_init_done(); 1969 break; 1970 1971 default: 1972 return; 1973 } 1974 } 1975 1976 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1977 bool command_completed = false; 1978 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1979 uint16_t opcode = little_endian_read_16(packet,3); 1980 if (opcode == hci_stack->last_cmd_opcode){ 1981 command_completed = true; 1982 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1983 } else { 1984 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1985 } 1986 } 1987 1988 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1989 uint8_t status = packet[2]; 1990 uint16_t opcode = little_endian_read_16(packet,4); 1991 if (opcode == hci_stack->last_cmd_opcode){ 1992 if (status){ 1993 command_completed = true; 1994 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1995 } else { 1996 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1997 } 1998 } else { 1999 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2000 } 2001 } 2002 #ifndef HAVE_HOST_CONTROLLER_API 2003 // Vendor == CSR 2004 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2005 // TODO: track actual command 2006 command_completed = true; 2007 } 2008 2009 // Vendor == Toshiba 2010 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2011 // TODO: track actual command 2012 command_completed = true; 2013 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2014 hci_stack->num_cmd_packets = 1; 2015 } 2016 #endif 2017 2018 return command_completed; 2019 } 2020 2021 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2022 2023 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2024 2025 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2026 2027 #ifndef HAVE_HOST_CONTROLLER_API 2028 2029 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2030 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2031 // 2032 // HCI Reset 2033 // Timeout 100 ms 2034 // HCI Reset 2035 // Command Complete Reset 2036 // HCI Read Local Version Information 2037 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2038 // hang... 2039 // 2040 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2041 if (!command_completed 2042 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2043 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2044 2045 uint16_t opcode = little_endian_read_16(packet,3); 2046 if (opcode == hci_reset.opcode){ 2047 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2048 return; 2049 } 2050 } 2051 2052 // CSR & H5 2053 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2054 if (!command_completed 2055 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2056 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2057 2058 uint16_t opcode = little_endian_read_16(packet,3); 2059 if (opcode == hci_reset.opcode){ 2060 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2061 return; 2062 } 2063 } 2064 2065 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2066 // fix: Correct substate and behave as command below 2067 if (command_completed){ 2068 switch (hci_stack->substate){ 2069 case HCI_INIT_SEND_RESET: 2070 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2071 break; 2072 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2073 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2074 break; 2075 default: 2076 break; 2077 } 2078 } 2079 2080 #endif 2081 2082 if (!command_completed) return; 2083 2084 bool need_baud_change = false; 2085 bool need_addr_change = false; 2086 2087 #ifndef HAVE_HOST_CONTROLLER_API 2088 need_baud_change = hci_stack->config 2089 && hci_stack->chipset 2090 && hci_stack->chipset->set_baudrate_command 2091 && hci_stack->hci_transport->set_baudrate 2092 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2093 2094 need_addr_change = hci_stack->custom_bd_addr_set 2095 && hci_stack->chipset 2096 && hci_stack->chipset->set_bd_addr_command; 2097 #endif 2098 2099 switch(hci_stack->substate){ 2100 2101 #ifndef HAVE_HOST_CONTROLLER_API 2102 case HCI_INIT_SEND_RESET: 2103 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2104 // fix: just correct substate and behave as command below 2105 2106 /* fall through */ 2107 #endif 2108 2109 case HCI_INIT_W4_SEND_RESET: 2110 btstack_run_loop_remove_timer(&hci_stack->timeout); 2111 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2112 return; 2113 2114 #ifndef HAVE_HOST_CONTROLLER_API 2115 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2116 // for STLC2500D, baud rate change already happened. 2117 // for others, baud rate gets changed now 2118 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2119 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2120 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2121 hci_stack->hci_transport->set_baudrate(baud_rate); 2122 } 2123 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2124 return; 2125 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2126 btstack_run_loop_remove_timer(&hci_stack->timeout); 2127 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2128 return; 2129 case HCI_INIT_W4_CUSTOM_INIT: 2130 // repeat custom init 2131 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2132 return; 2133 #endif 2134 2135 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2136 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2137 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2138 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2139 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2140 return; 2141 } 2142 if (need_addr_change){ 2143 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2144 return; 2145 } 2146 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2147 return; 2148 #ifndef HAVE_HOST_CONTROLLER_API 2149 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2150 if (need_baud_change){ 2151 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2152 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2153 hci_stack->hci_transport->set_baudrate(baud_rate); 2154 } 2155 if (need_addr_change){ 2156 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2157 return; 2158 } 2159 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2160 return; 2161 case HCI_INIT_W4_SET_BD_ADDR: 2162 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2163 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2164 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2165 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2166 return; 2167 } 2168 // skipping st warm boot 2169 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2170 return; 2171 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2172 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2173 return; 2174 #endif 2175 2176 case HCI_INIT_DONE: 2177 // set state if we came here by fall through 2178 hci_stack->substate = HCI_INIT_DONE; 2179 return; 2180 2181 default: 2182 break; 2183 } 2184 hci_initializing_next_state(); 2185 } 2186 2187 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2188 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2189 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2190 // check if the hci connection has been outgoing 2191 switch (conn->state){ 2192 case SEND_CREATE_CONNECTION: 2193 case RECEIVED_CONNECTION_REQUEST: 2194 break; 2195 default: 2196 return; 2197 } 2198 2199 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2200 bd_addr_t bd_address; 2201 (void)memcpy(&bd_address, conn->address, 6); 2202 2203 #ifdef ENABLE_CLASSIC 2204 // cache needed data 2205 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2206 #endif 2207 2208 // connection failed, remove entry 2209 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2210 btstack_memory_hci_connection_free( conn ); 2211 2212 #ifdef ENABLE_CLASSIC 2213 // notify client if dedicated bonding 2214 if (notify_dedicated_bonding_failed){ 2215 log_info("hci notify_dedicated_bonding_failed"); 2216 hci_emit_dedicated_bonding_result(bd_address, status); 2217 } 2218 2219 // if authentication error, also delete link key 2220 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2221 gap_drop_link_key_for_bd_addr(bd_address); 2222 } 2223 #else 2224 UNUSED(status); 2225 #endif 2226 } 2227 2228 #ifdef ENABLE_CLASSIC 2229 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2230 // SSP Controller 2231 if (features[6] & (1 << 3)){ 2232 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2233 } 2234 // eSCO 2235 if (features[3] & (1<<7)){ 2236 conn->remote_supported_features[0] |= 1; 2237 } 2238 // Extended features 2239 if (features[7] & (1<<7)){ 2240 conn->remote_supported_features[0] |= 2; 2241 } 2242 } 2243 2244 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2245 // SSP Host 2246 if (features[0] & (1 << 0)){ 2247 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2248 } 2249 // SC Host 2250 if (features[0] & (1 << 3)){ 2251 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2252 } 2253 } 2254 2255 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2256 // SC Controller 2257 if (features[1] & (1 << 0)){ 2258 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2259 } 2260 } 2261 2262 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2263 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2264 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2265 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2266 if (conn->bonding_flags & BONDING_DEDICATED){ 2267 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2268 } 2269 } 2270 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2271 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2272 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2273 } 2274 2275 #endif 2276 2277 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2278 // handle BT initialization 2279 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2280 hci_initializing_event_handler(packet, size); 2281 } 2282 2283 // help with BT sleep 2284 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2285 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2286 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2287 hci_initializing_next_state(); 2288 } 2289 } 2290 2291 #ifdef ENABLE_CLASSIC 2292 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2293 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2294 conn->encryption_key_size = encryption_key_size; 2295 2296 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2297 conn->requested_security_level = LEVEL_0; 2298 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2299 return; 2300 } 2301 2302 // Request remote features if not already done 2303 hci_trigger_remote_features_for_connection(conn); 2304 2305 // Request Authentication if not already done 2306 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2307 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2308 } 2309 #endif 2310 2311 static void hci_store_local_supported_commands(const uint8_t * packet){ 2312 // create mapping table 2313 #define X(name, offset, bit) { offset, bit }, 2314 static struct { 2315 uint8_t byte_offset; 2316 uint8_t bit_position; 2317 } supported_hci_commands_map [] = { 2318 SUPPORTED_HCI_COMMANDS 2319 }; 2320 #undef X 2321 2322 // create names for debug purposes 2323 #ifdef ENABLE_LOG_DEBUG 2324 #define X(name, offset, bit) #name, 2325 static const char * command_names[] = { 2326 SUPPORTED_HCI_COMMANDS 2327 }; 2328 #undef X 2329 #endif 2330 2331 hci_stack->local_supported_commands = 0; 2332 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2333 uint16_t i; 2334 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2335 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2336 #ifdef ENABLE_LOG_DEBUG 2337 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); 2338 #else 2339 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2340 #endif 2341 hci_stack->local_supported_commands |= (1LU << i); 2342 } 2343 } 2344 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2345 } 2346 2347 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2348 UNUSED(size); 2349 2350 uint16_t manufacturer; 2351 #ifdef ENABLE_CLASSIC 2352 hci_con_handle_t handle; 2353 hci_connection_t * conn; 2354 uint8_t status; 2355 #endif 2356 // get num cmd packets - limit to 1 to reduce complexity 2357 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2358 2359 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2360 switch (opcode){ 2361 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2362 if (packet[5]) break; 2363 // terminate, name 248 chars 2364 packet[6+248] = 0; 2365 log_info("local name: %s", &packet[6]); 2366 break; 2367 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2368 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2369 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2370 uint16_t acl_len = little_endian_read_16(packet, 6); 2371 uint16_t sco_len = packet[8]; 2372 2373 // determine usable ACL/SCO payload size 2374 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2375 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2376 2377 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2378 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2379 2380 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2381 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2382 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2383 } 2384 break; 2385 case HCI_OPCODE_HCI_READ_RSSI: 2386 if (packet[5] == ERROR_CODE_SUCCESS){ 2387 uint8_t event[5]; 2388 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2389 event[1] = 3; 2390 (void)memcpy(&event[2], &packet[6], 3); 2391 hci_emit_event(event, sizeof(event), 1); 2392 } 2393 break; 2394 #ifdef ENABLE_BLE 2395 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2396 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2397 hci_stack->le_acl_packets_total_num = packet[8]; 2398 // determine usable ACL payload size 2399 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2400 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2401 } 2402 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2403 break; 2404 #endif 2405 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2406 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2407 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2408 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2409 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); 2410 break; 2411 #endif 2412 #ifdef ENABLE_LE_CENTRAL 2413 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2414 hci_stack->le_whitelist_capacity = packet[6]; 2415 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2416 break; 2417 #endif 2418 #ifdef ENABLE_LE_PERIPHERAL 2419 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2420 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2421 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2422 break; 2423 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2424 if (hci_stack->le_advertising_set_in_current_command != 0) { 2425 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2426 hci_stack->le_advertising_set_in_current_command = 0; 2427 if (advertising_set == NULL) break; 2428 uint8_t adv_status = packet[6]; 2429 uint8_t tx_power = packet[7]; 2430 uint8_t event[] = { HCI_EVENT_META_GAP, 4, GAP_SUBEVENT_ADVERTISING_SET_INSTALLED, hci_stack->le_advertising_set_in_current_command, adv_status, tx_power }; 2431 if (adv_status == 0){ 2432 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2433 } 2434 hci_emit_event(event, sizeof(event), 1); 2435 } 2436 break; 2437 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2438 if (hci_stack->le_advertising_set_in_current_command != 0) { 2439 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2440 hci_stack->le_advertising_set_in_current_command = 0; 2441 if (advertising_set == NULL) break; 2442 uint8_t adv_status = packet[5]; 2443 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2444 if (adv_status == 0){ 2445 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2446 } 2447 hci_emit_event(event, sizeof(event), 1); 2448 } 2449 break; 2450 #endif 2451 #endif 2452 case HCI_OPCODE_HCI_READ_BD_ADDR: 2453 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2454 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)); 2455 #ifdef ENABLE_CLASSIC 2456 if (hci_stack->link_key_db){ 2457 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2458 } 2459 #endif 2460 break; 2461 #ifdef ENABLE_CLASSIC 2462 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2463 hci_emit_discoverable_enabled(hci_stack->discoverable); 2464 break; 2465 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2466 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2467 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2468 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2469 hci_emit_event(event, sizeof(event), 1); 2470 } 2471 break; 2472 #endif 2473 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2474 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2475 2476 #ifdef ENABLE_CLASSIC 2477 // determine usable ACL packet types based on host buffer size and supported features 2478 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2479 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2480 #endif 2481 // Classic/LE 2482 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2483 break; 2484 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2485 manufacturer = little_endian_read_16(packet, 10); 2486 // map Cypress to Broadcom 2487 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2488 log_info("Treat Cypress as Broadcom"); 2489 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2490 little_endian_store_16(packet, 10, manufacturer); 2491 } 2492 hci_stack->manufacturer = manufacturer; 2493 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2494 break; 2495 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2496 hci_store_local_supported_commands(packet); 2497 break; 2498 #ifdef ENABLE_CLASSIC 2499 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2500 if (packet[5]) return; 2501 hci_stack->synchronous_flow_control_enabled = 1; 2502 break; 2503 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2504 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2505 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2506 conn = hci_connection_for_handle(handle); 2507 if (conn != NULL) { 2508 uint8_t key_size = 0; 2509 if (status == 0){ 2510 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2511 log_info("Handle %04x key Size: %u", handle, key_size); 2512 } else { 2513 key_size = 1; 2514 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2515 } 2516 hci_handle_read_encryption_key_size_complete(conn, key_size); 2517 } 2518 break; 2519 // assert pairing complete event is emitted. 2520 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2521 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2522 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2523 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2524 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2525 // lookup connection by gap pairing addr 2526 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2527 if (conn == NULL) break; 2528 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2529 break; 2530 2531 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2532 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2533 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2534 uint8_t event[67]; 2535 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2536 event[1] = 65; 2537 (void)memset(&event[2], 0, 65); 2538 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2539 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2540 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2541 event[2] = 3; 2542 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2543 } else { 2544 event[2] = 1; 2545 } 2546 } 2547 hci_emit_event(event, sizeof(event), 0); 2548 break; 2549 } 2550 2551 // note: only needed if user does not provide OOB data 2552 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2553 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2554 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2555 if (conn == NULL) break; 2556 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2557 break; 2558 #endif 2559 #endif 2560 default: 2561 break; 2562 } 2563 } 2564 2565 #ifdef ENABLE_BLE 2566 static void event_handle_le_connection_complete(const uint8_t * packet){ 2567 bd_addr_t addr; 2568 bd_addr_type_t addr_type; 2569 hci_connection_t * conn; 2570 2571 // Connection management 2572 reverse_bd_addr(&packet[8], addr); 2573 addr_type = (bd_addr_type_t)packet[7]; 2574 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2575 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2576 2577 #ifdef ENABLE_LE_CENTRAL 2578 // handle error: error is reported only to the initiator -> outgoing connection 2579 if (packet[3]){ 2580 2581 // handle cancelled outgoing connection 2582 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2583 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2584 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2585 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2586 // reset state 2587 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2588 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2589 // get outgoing connection conn struct for direct connect 2590 conn = gap_get_outgoing_connection(); 2591 } 2592 2593 // outgoing le connection establishment is done 2594 if (conn){ 2595 // remove entry 2596 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2597 btstack_memory_hci_connection_free( conn ); 2598 } 2599 return; 2600 } 2601 #endif 2602 2603 // on success, both hosts receive connection complete event 2604 if (packet[6] == HCI_ROLE_MASTER){ 2605 #ifdef ENABLE_LE_CENTRAL 2606 // if we're master on an le connection, it was an outgoing connection and we're done with it 2607 // note: no hci_connection_t object exists yet for connect with whitelist 2608 if (hci_is_le_connection_type(addr_type)){ 2609 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2610 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2611 } 2612 #endif 2613 } else { 2614 #ifdef ENABLE_LE_PERIPHERAL 2615 // if we're slave, it was an incoming connection, advertisements have stopped 2616 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2617 #endif 2618 } 2619 2620 // LE connections are auto-accepted, so just create a connection if there isn't one already 2621 if (!conn){ 2622 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2623 } 2624 2625 // no memory, sorry. 2626 if (!conn){ 2627 return; 2628 } 2629 2630 conn->state = OPEN; 2631 conn->role = packet[6]; 2632 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2633 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2634 2635 #ifdef ENABLE_LE_PERIPHERAL 2636 if (packet[6] == HCI_ROLE_SLAVE){ 2637 hci_update_advertisements_enabled_for_current_roles(); 2638 } 2639 #endif 2640 2641 // init unenhanced att bearer mtu 2642 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2643 conn->att_connection.mtu_exchanged = false; 2644 2645 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2646 2647 // restart timer 2648 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2649 // btstack_run_loop_add_timer(&conn->timeout); 2650 2651 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2652 2653 hci_emit_nr_connections_changed(); 2654 } 2655 #endif 2656 2657 #ifdef ENABLE_CLASSIC 2658 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){ 2659 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2660 // LEVEL_4 is tested by l2cap 2661 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2662 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2663 if (level >= LEVEL_3){ 2664 // MITM not possible without keyboard or display 2665 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2666 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2667 2668 // MITM possible if one side has keyboard and the other has keyboard or display 2669 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2670 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2671 2672 // MITM not possible if one side has only display and other side has no keyboard 2673 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2674 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2675 } 2676 // LEVEL 2 requires SSP, which is a given 2677 return true; 2678 } 2679 2680 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2681 uint16_t i; 2682 for (i=0; i < size ; i++){ 2683 if (data[i] != 0) { 2684 return false; 2685 } 2686 } 2687 return true; 2688 } 2689 2690 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2691 // get requested security level 2692 gap_security_level_t requested_security_level = conn->requested_security_level; 2693 if (hci_stack->gap_secure_connections_only_mode){ 2694 requested_security_level = LEVEL_4; 2695 } 2696 2697 // assess security: LEVEL 4 requires SC 2698 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2699 if ((requested_security_level == LEVEL_4) && 2700 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2701 !hci_remote_sc_enabled(conn)){ 2702 log_info("Level 4 required, but SC not supported -> abort"); 2703 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2704 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2705 return; 2706 } 2707 2708 // assess security based on io capabilities 2709 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2710 // responder: fully validate io caps of both sides as well as OOB data 2711 bool security_possible = false; 2712 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2713 2714 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2715 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2716 // so we merge the OOB data availability 2717 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2718 if (conn->classic_oob_c_192 != NULL){ 2719 have_oob_data |= 1; 2720 } 2721 if (conn->classic_oob_c_256 != NULL){ 2722 have_oob_data |= 2; 2723 } 2724 // for up to Level 3, either P-192 as well as P-256 will do 2725 // 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 2726 // if remote does not SC, we should not receive P-256 data either 2727 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2728 security_possible = true; 2729 } 2730 // for Level 4, P-256 is needed 2731 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2732 security_possible = true; 2733 } 2734 #endif 2735 2736 if (security_possible == false){ 2737 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2738 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2739 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2740 return; 2741 } 2742 } else { 2743 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2744 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2745 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2746 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2747 log_info("Level 3+ required, but no input/output -> abort"); 2748 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2749 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2750 return; 2751 } 2752 #endif 2753 #endif 2754 } 2755 2756 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2757 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2758 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2759 } else { 2760 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2761 } 2762 #endif 2763 } 2764 2765 #endif 2766 2767 static void event_handler(uint8_t *packet, uint16_t size){ 2768 2769 uint16_t event_length = packet[1]; 2770 2771 // assert packet is complete 2772 if (size != (event_length + 2u)){ 2773 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2774 return; 2775 } 2776 2777 bd_addr_type_t addr_type; 2778 hci_con_handle_t handle; 2779 hci_connection_t * conn; 2780 int i; 2781 int create_connection_cmd; 2782 2783 #ifdef ENABLE_CLASSIC 2784 hci_link_type_t link_type; 2785 bd_addr_t addr; 2786 #endif 2787 2788 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2789 2790 switch (hci_event_packet_get_type(packet)) { 2791 2792 case HCI_EVENT_COMMAND_COMPLETE: 2793 handle_command_complete_event(packet, size); 2794 break; 2795 2796 case HCI_EVENT_COMMAND_STATUS: 2797 // get num cmd packets - limit to 1 to reduce complexity 2798 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2799 2800 // check command status to detected failed outgoing connections 2801 create_connection_cmd = 0; 2802 #ifdef ENABLE_CLASSIC 2803 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2804 create_connection_cmd = 1; 2805 } 2806 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2807 create_connection_cmd = 1; 2808 } 2809 #endif 2810 #ifdef ENABLE_LE_CENTRAL 2811 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2812 create_connection_cmd = 1; 2813 } 2814 #endif 2815 if (create_connection_cmd) { 2816 uint8_t status = hci_event_command_status_get_status(packet); 2817 addr_type = hci_stack->outgoing_addr_type; 2818 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2819 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); 2820 2821 // reset outgoing address info 2822 memset(hci_stack->outgoing_addr, 0, 6); 2823 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2824 2825 // on error 2826 if (status != ERROR_CODE_SUCCESS){ 2827 #ifdef ENABLE_LE_CENTRAL 2828 if (hci_is_le_connection_type(addr_type)){ 2829 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2830 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2831 } 2832 #endif 2833 // error => outgoing connection failed 2834 if (conn != NULL){ 2835 hci_handle_connection_failed(conn, status); 2836 } 2837 } 2838 } 2839 2840 #ifdef ENABLE_CLASSIC 2841 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2842 uint8_t status = hci_event_command_status_get_status(packet); 2843 log_info("command status (inquiry), status %x", status); 2844 if (status == ERROR_CODE_SUCCESS) { 2845 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2846 } else { 2847 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2848 } 2849 } 2850 #endif 2851 break; 2852 2853 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2854 if (size < 3) return; 2855 uint16_t num_handles = packet[2]; 2856 if (size != (3u + num_handles * 4u)) return; 2857 uint16_t offset = 3; 2858 for (i=0; i<num_handles;i++){ 2859 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2860 offset += 2u; 2861 uint16_t num_packets = little_endian_read_16(packet, offset); 2862 offset += 2u; 2863 2864 conn = hci_connection_for_handle(handle); 2865 if (!conn){ 2866 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2867 continue; 2868 } 2869 2870 if (conn->num_packets_sent >= num_packets){ 2871 conn->num_packets_sent -= num_packets; 2872 } else { 2873 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2874 conn->num_packets_sent = 0; 2875 } 2876 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2877 2878 #ifdef ENABLE_CLASSIC 2879 // For SCO, we do the can_send_now_check here 2880 hci_notify_if_sco_can_send_now(); 2881 #endif 2882 } 2883 break; 2884 } 2885 2886 #ifdef ENABLE_CLASSIC 2887 case HCI_EVENT_INQUIRY_COMPLETE: 2888 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2889 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2890 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2891 hci_emit_event(event, sizeof(event), 1); 2892 } 2893 break; 2894 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2895 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2896 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2897 } 2898 break; 2899 case HCI_EVENT_CONNECTION_REQUEST: 2900 reverse_bd_addr(&packet[2], addr); 2901 link_type = (hci_link_type_t) packet[11]; 2902 2903 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2904 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2905 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2906 bd_addr_copy(hci_stack->decline_addr, addr); 2907 break; 2908 } 2909 2910 if (hci_stack->gap_classic_accept_callback != NULL){ 2911 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2912 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2913 bd_addr_copy(hci_stack->decline_addr, addr); 2914 break; 2915 } 2916 } 2917 2918 // TODO: eval COD 8-10 2919 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2920 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2921 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2922 if (!conn) { 2923 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2924 } 2925 if (!conn) { 2926 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2927 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2928 bd_addr_copy(hci_stack->decline_addr, addr); 2929 hci_run(); 2930 // avoid event to higher layer 2931 return; 2932 } 2933 conn->role = HCI_ROLE_SLAVE; 2934 conn->state = RECEIVED_CONNECTION_REQUEST; 2935 // store info about eSCO 2936 if (link_type == HCI_LINK_TYPE_ESCO){ 2937 conn->remote_supported_features[0] |= 1; 2938 } 2939 hci_run(); 2940 break; 2941 2942 case HCI_EVENT_CONNECTION_COMPLETE: 2943 // Connection management 2944 reverse_bd_addr(&packet[5], addr); 2945 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2946 addr_type = BD_ADDR_TYPE_ACL; 2947 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2948 if (conn) { 2949 if (!packet[2]){ 2950 conn->state = OPEN; 2951 conn->con_handle = little_endian_read_16(packet, 3); 2952 2953 // queue set supervision timeout if we're master 2954 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2955 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2956 } 2957 2958 // restart timer 2959 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2960 btstack_run_loop_add_timer(&conn->timeout); 2961 2962 // trigger remote features for dedicated bonding 2963 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2964 hci_trigger_remote_features_for_connection(conn); 2965 } 2966 2967 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2968 2969 hci_emit_nr_connections_changed(); 2970 } else { 2971 // connection failed 2972 hci_handle_connection_failed(conn, packet[2]); 2973 } 2974 } 2975 break; 2976 2977 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2978 reverse_bd_addr(&packet[5], addr); 2979 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2980 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2981 if (packet[2]){ 2982 // connection failed 2983 if (conn){ 2984 hci_handle_connection_failed(conn, packet[2]); 2985 } 2986 break; 2987 } 2988 if (!conn) { 2989 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2990 } 2991 if (!conn) { 2992 break; 2993 } 2994 conn->state = OPEN; 2995 conn->con_handle = little_endian_read_16(packet, 3); 2996 2997 #ifdef ENABLE_SCO_OVER_HCI 2998 // update SCO 2999 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3000 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3001 } 3002 // trigger can send now 3003 if (hci_have_usb_transport()){ 3004 hci_stack->sco_can_send_now = true; 3005 } 3006 #endif 3007 #ifdef HAVE_SCO_TRANSPORT 3008 // configure sco transport 3009 if (hci_stack->sco_transport != NULL){ 3010 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3011 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3012 } 3013 #endif 3014 break; 3015 3016 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3017 handle = little_endian_read_16(packet, 3); 3018 conn = hci_connection_for_handle(handle); 3019 if (!conn) break; 3020 if (!packet[2]){ 3021 const uint8_t * features = &packet[5]; 3022 hci_handle_remote_features_page_0(conn, features); 3023 3024 // read extended features if possible 3025 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3026 && ((conn->remote_supported_features[0] & 2) != 0)) { 3027 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3028 break; 3029 } 3030 } 3031 hci_handle_remote_features_received(conn); 3032 break; 3033 3034 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3035 handle = little_endian_read_16(packet, 3); 3036 conn = hci_connection_for_handle(handle); 3037 if (!conn) break; 3038 // status = ok, page = 1 3039 if (!packet[2]) { 3040 uint8_t page_number = packet[5]; 3041 uint8_t maximum_page_number = packet[6]; 3042 const uint8_t * features = &packet[7]; 3043 bool done = false; 3044 switch (page_number){ 3045 case 1: 3046 hci_handle_remote_features_page_1(conn, features); 3047 if (maximum_page_number >= 2){ 3048 // get Secure Connections (Controller) from Page 2 if available 3049 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3050 } else { 3051 // otherwise, assume SC (Controller) == SC (Host) 3052 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3053 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3054 } 3055 done = true; 3056 } 3057 break; 3058 case 2: 3059 hci_handle_remote_features_page_2(conn, features); 3060 done = true; 3061 break; 3062 default: 3063 break; 3064 } 3065 if (!done) break; 3066 } 3067 hci_handle_remote_features_received(conn); 3068 break; 3069 3070 case HCI_EVENT_LINK_KEY_REQUEST: 3071 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3072 hci_event_link_key_request_get_bd_addr(packet, addr); 3073 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3074 if (!conn) break; 3075 3076 // lookup link key in db if not cached 3077 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3078 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3079 } 3080 3081 // response sent by hci_run() 3082 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3083 #endif 3084 break; 3085 3086 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3087 hci_event_link_key_request_get_bd_addr(packet, addr); 3088 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3089 if (!conn) break; 3090 3091 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3092 3093 // CVE-2020-26555: ignore NULL link key 3094 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3095 if (btstack_is_null(&packet[8], 16)) break; 3096 3097 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3098 // Change Connection Encryption keeps link key type 3099 if (link_key_type != CHANGED_COMBINATION_KEY){ 3100 conn->link_key_type = link_key_type; 3101 } 3102 3103 // cache link key. link keys stored in little-endian format for legacy reasons 3104 memcpy(&conn->link_key, &packet[8], 16); 3105 3106 // only store link key: 3107 // - if bondable enabled 3108 if (hci_stack->bondable == false) break; 3109 // - if security level sufficient 3110 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3111 // - for SSP, also check if remote side requested bonding as well 3112 if (conn->link_key_type != COMBINATION_KEY){ 3113 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3114 if (!remote_bonding){ 3115 break; 3116 } 3117 } 3118 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3119 break; 3120 } 3121 3122 case HCI_EVENT_PIN_CODE_REQUEST: 3123 hci_event_pin_code_request_get_bd_addr(packet, addr); 3124 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3125 if (!conn) break; 3126 3127 hci_pairing_started(conn, false); 3128 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3129 if (!hci_stack->bondable ){ 3130 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3131 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3132 hci_run(); 3133 return; 3134 } 3135 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3136 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3137 log_info("Level 4 required, but SC not supported -> abort"); 3138 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3139 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3140 hci_run(); 3141 return; 3142 } 3143 break; 3144 3145 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3146 hci_event_io_capability_response_get_bd_addr(packet, addr); 3147 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3148 if (!conn) break; 3149 3150 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3151 hci_pairing_started(conn, true); 3152 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3153 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3154 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3155 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3156 #endif 3157 break; 3158 3159 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3160 hci_event_io_capability_response_get_bd_addr(packet, addr); 3161 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3162 if (!conn) break; 3163 3164 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3165 hci_connection_timestamp(conn); 3166 hci_pairing_started(conn, true); 3167 break; 3168 3169 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3170 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3171 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3172 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3173 if (!conn) break; 3174 3175 hci_connection_timestamp(conn); 3176 3177 hci_pairing_started(conn, true); 3178 3179 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3180 break; 3181 #endif 3182 3183 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3184 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3185 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3186 if (!conn) break; 3187 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3188 if (hci_stack->ssp_auto_accept){ 3189 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3190 }; 3191 } else { 3192 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3193 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3194 // don't forward event to app 3195 hci_run(); 3196 return; 3197 } 3198 break; 3199 3200 case HCI_EVENT_USER_PASSKEY_REQUEST: 3201 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3202 if (hci_stack->ssp_auto_accept){ 3203 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3204 }; 3205 break; 3206 3207 case HCI_EVENT_MODE_CHANGE: 3208 handle = hci_event_mode_change_get_handle(packet); 3209 conn = hci_connection_for_handle(handle); 3210 if (!conn) break; 3211 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3212 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3213 break; 3214 #endif 3215 3216 case HCI_EVENT_ENCRYPTION_CHANGE: 3217 handle = hci_event_encryption_change_get_connection_handle(packet); 3218 conn = hci_connection_for_handle(handle); 3219 if (!conn) break; 3220 if (hci_event_encryption_change_get_status(packet) == 0u) { 3221 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3222 if (encryption_enabled){ 3223 if (hci_is_le_connection(conn)){ 3224 // For LE, we accept connection as encrypted 3225 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3226 } 3227 #ifdef ENABLE_CLASSIC 3228 else { 3229 3230 // dedicated bonding: send result and disconnect 3231 if (conn->bonding_flags & BONDING_DEDICATED){ 3232 conn->bonding_flags &= ~BONDING_DEDICATED; 3233 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3234 conn->bonding_status = packet[2]; 3235 break; 3236 } 3237 3238 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3239 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3240 bool connected_uses_aes_ccm = encryption_enabled == 2; 3241 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3242 log_info("SC during pairing, but only E0 now -> abort"); 3243 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3244 break; 3245 } 3246 3247 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3248 if (connected_uses_aes_ccm){ 3249 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3250 } 3251 3252 #ifdef ENABLE_TESTING_SUPPORT 3253 // work around for issue with PTS dongle 3254 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3255 #endif 3256 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3257 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3258 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3259 } else { 3260 // if not, pretend everything is perfect 3261 hci_handle_read_encryption_key_size_complete(conn, 16); 3262 } 3263 } 3264 #endif 3265 } else { 3266 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3267 } 3268 } 3269 3270 break; 3271 3272 #ifdef ENABLE_CLASSIC 3273 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3274 handle = hci_event_authentication_complete_get_connection_handle(packet); 3275 conn = hci_connection_for_handle(handle); 3276 if (!conn) break; 3277 3278 // clear authentication active flag 3279 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3280 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3281 3282 // authenticated only if auth status == 0 3283 if (hci_event_authentication_complete_get_status(packet) == 0){ 3284 // authenticated 3285 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3286 3287 // If not already encrypted, start encryption 3288 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3289 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3290 break; 3291 } 3292 } 3293 3294 // emit updated security level 3295 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3296 break; 3297 3298 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3299 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3300 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3301 if (!conn) break; 3302 3303 // treat successfully paired connection as authenticated 3304 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3305 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3306 } 3307 3308 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3309 break; 3310 #endif 3311 3312 // HCI_EVENT_DISCONNECTION_COMPLETE 3313 // has been split, to first notify stack before shutting connection down 3314 // see end of function, too. 3315 case HCI_EVENT_DISCONNECTION_COMPLETE: 3316 if (packet[2]) break; // status != 0 3317 handle = little_endian_read_16(packet, 3); 3318 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3319 if (hci_stack->acl_fragmentation_total_size > 0u) { 3320 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3321 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3322 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3323 hci_stack->acl_fragmentation_total_size = 0; 3324 hci_stack->acl_fragmentation_pos = 0; 3325 if (release_buffer){ 3326 hci_release_packet_buffer(); 3327 } 3328 } 3329 } 3330 3331 conn = hci_connection_for_handle(handle); 3332 if (!conn) break; 3333 #ifdef ENABLE_CLASSIC 3334 // pairing failed if it was ongoing 3335 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3336 #endif 3337 3338 // emit dedicatd bonding event 3339 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3340 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3341 } 3342 3343 // mark connection for shutdown, stop timers, reset state 3344 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3345 hci_connection_stop_timer(conn); 3346 hci_connection_init(conn); 3347 3348 #ifdef ENABLE_BLE 3349 #ifdef ENABLE_LE_PERIPHERAL 3350 // re-enable advertisements for le connections if active 3351 if (hci_is_le_connection(conn)){ 3352 hci_update_advertisements_enabled_for_current_roles(); 3353 } 3354 #endif 3355 #endif 3356 break; 3357 3358 case HCI_EVENT_HARDWARE_ERROR: 3359 log_error("Hardware Error: 0x%02x", packet[2]); 3360 if (hci_stack->hardware_error_callback){ 3361 (*hci_stack->hardware_error_callback)(packet[2]); 3362 } else { 3363 // if no special requests, just reboot stack 3364 hci_power_control_off(); 3365 hci_power_control_on(); 3366 } 3367 break; 3368 3369 #ifdef ENABLE_CLASSIC 3370 case HCI_EVENT_ROLE_CHANGE: 3371 if (packet[2]) break; // status != 0 3372 reverse_bd_addr(&packet[3], addr); 3373 addr_type = BD_ADDR_TYPE_ACL; 3374 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3375 if (!conn) break; 3376 conn->role = packet[9]; 3377 break; 3378 #endif 3379 3380 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3381 // release packet buffer only for asynchronous transport and if there are not further fragements 3382 if (hci_transport_synchronous()) { 3383 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3384 return; // instead of break: to avoid re-entering hci_run() 3385 } 3386 hci_stack->acl_fragmentation_tx_active = 0; 3387 if (hci_stack->acl_fragmentation_total_size) break; 3388 hci_release_packet_buffer(); 3389 3390 // L2CAP receives this event via the hci_emit_event below 3391 3392 #ifdef ENABLE_CLASSIC 3393 // For SCO, we do the can_send_now_check here 3394 hci_notify_if_sco_can_send_now(); 3395 #endif 3396 break; 3397 3398 #ifdef ENABLE_CLASSIC 3399 case HCI_EVENT_SCO_CAN_SEND_NOW: 3400 // For SCO, we do the can_send_now_check here 3401 hci_stack->sco_can_send_now = true; 3402 hci_notify_if_sco_can_send_now(); 3403 return; 3404 3405 // explode inquriy results for easier consumption 3406 case HCI_EVENT_INQUIRY_RESULT: 3407 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3408 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3409 gap_inquiry_explode(packet, size); 3410 break; 3411 #endif 3412 3413 #ifdef ENABLE_BLE 3414 case HCI_EVENT_LE_META: 3415 switch (packet[2]){ 3416 #ifdef ENABLE_LE_CENTRAL 3417 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3418 if (!hci_stack->le_scanning_enabled) break; 3419 le_handle_advertisement_report(packet, size); 3420 break; 3421 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3422 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3423 if (!hci_stack->le_scanning_enabled) break; 3424 le_handle_extended_advertisement_report(packet, size); 3425 break; 3426 #endif 3427 #endif 3428 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3429 event_handle_le_connection_complete(packet); 3430 break; 3431 3432 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3433 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3434 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3435 conn = hci_connection_for_handle(handle); 3436 if (!conn) break; 3437 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3438 break; 3439 3440 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3441 // connection 3442 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3443 conn = hci_connection_for_handle(handle); 3444 if (conn) { 3445 // read arguments 3446 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3447 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3448 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3449 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3450 3451 // validate against current connection parameter range 3452 le_connection_parameter_range_t existing_range; 3453 gap_get_connection_parameter_range(&existing_range); 3454 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3455 if (update_parameter){ 3456 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3457 conn->le_conn_interval_min = le_conn_interval_min; 3458 conn->le_conn_interval_max = le_conn_interval_max; 3459 conn->le_conn_latency = le_conn_latency; 3460 conn->le_supervision_timeout = le_supervision_timeout; 3461 } else { 3462 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3463 } 3464 } 3465 break; 3466 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3467 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3468 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3469 conn = hci_connection_for_handle(handle); 3470 if (conn) { 3471 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3472 } 3473 break; 3474 #endif 3475 default: 3476 break; 3477 } 3478 break; 3479 #endif 3480 case HCI_EVENT_VENDOR_SPECIFIC: 3481 // Vendor specific commands often create vendor specific event instead of num completed packets 3482 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3483 switch (hci_stack->manufacturer){ 3484 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3485 hci_stack->num_cmd_packets = 1; 3486 break; 3487 default: 3488 break; 3489 } 3490 break; 3491 default: 3492 break; 3493 } 3494 3495 handle_event_for_current_stack_state(packet, size); 3496 3497 // notify upper stack 3498 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3499 3500 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3501 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3502 handle = little_endian_read_16(packet, 3); 3503 hci_connection_t * aConn = hci_connection_for_handle(handle); 3504 // discard connection if app did not trigger a reconnect in the event handler 3505 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3506 hci_shutdown_connection(aConn); 3507 } 3508 } 3509 3510 // execute main loop 3511 hci_run(); 3512 } 3513 3514 #ifdef ENABLE_CLASSIC 3515 3516 #ifdef ENABLE_SCO_OVER_HCI 3517 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3518 static void sco_schedule_tx(hci_connection_t * conn); 3519 3520 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3521 log_debug("SCO TX Timeout"); 3522 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3523 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3524 if (!conn) return; 3525 3526 // trigger send 3527 conn->sco_tx_ready = 1; 3528 // extra packet if CVSD but SCO buffer is too short 3529 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3530 conn->sco_tx_ready++; 3531 } 3532 hci_notify_if_sco_can_send_now(); 3533 } 3534 3535 3536 #define SCO_TX_AFTER_RX_MS (6) 3537 3538 static void sco_schedule_tx(hci_connection_t * conn){ 3539 3540 uint32_t now = btstack_run_loop_get_time_ms(); 3541 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3542 int time_delta_ms = sco_tx_ms - now; 3543 3544 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3545 3546 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3547 btstack_run_loop_remove_timer(timer); 3548 btstack_run_loop_set_timer(timer, time_delta_ms); 3549 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3550 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3551 btstack_run_loop_add_timer(timer); 3552 } 3553 #endif 3554 3555 static void sco_handler(uint8_t * packet, uint16_t size){ 3556 // lookup connection struct 3557 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3558 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3559 if (!conn) return; 3560 3561 #ifdef ENABLE_SCO_OVER_HCI 3562 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3563 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3564 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3565 packet[2] = 0x3c; 3566 memmove(&packet[3], &packet[23], 63); 3567 size = 63; 3568 } 3569 } 3570 3571 if (hci_have_usb_transport()){ 3572 // Nothing to do 3573 } else { 3574 // 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); 3575 if (hci_stack->synchronous_flow_control_enabled == 0){ 3576 uint32_t now = btstack_run_loop_get_time_ms(); 3577 3578 if (!conn->sco_rx_valid){ 3579 // ignore first 10 packets 3580 conn->sco_rx_count++; 3581 // log_debug("sco rx count %u", conn->sco_rx_count); 3582 if (conn->sco_rx_count == 10) { 3583 // use first timestamp as is and pretent it just started 3584 conn->sco_rx_ms = now; 3585 conn->sco_rx_valid = 1; 3586 conn->sco_rx_count = 0; 3587 sco_schedule_tx(conn); 3588 } 3589 } else { 3590 // track expected arrival timme 3591 conn->sco_rx_count++; 3592 conn->sco_rx_ms += 7; 3593 int delta = (int32_t) (now - conn->sco_rx_ms); 3594 if (delta > 0){ 3595 conn->sco_rx_ms++; 3596 } 3597 // log_debug("sco rx %u", conn->sco_rx_ms); 3598 sco_schedule_tx(conn); 3599 } 3600 } 3601 } 3602 #endif 3603 3604 // deliver to app 3605 if (hci_stack->sco_packet_handler) { 3606 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3607 } 3608 3609 #ifdef HAVE_SCO_TRANSPORT 3610 // We can send one packet for each received packet 3611 conn->sco_tx_ready++; 3612 hci_notify_if_sco_can_send_now(); 3613 #endif 3614 3615 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3616 conn->num_packets_completed++; 3617 hci_stack->host_completed_packets = 1; 3618 hci_run(); 3619 #endif 3620 } 3621 #endif 3622 3623 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3624 hci_dump_packet(packet_type, 1, packet, size); 3625 switch (packet_type) { 3626 case HCI_EVENT_PACKET: 3627 event_handler(packet, size); 3628 break; 3629 case HCI_ACL_DATA_PACKET: 3630 acl_handler(packet, size); 3631 break; 3632 #ifdef ENABLE_CLASSIC 3633 case HCI_SCO_DATA_PACKET: 3634 sco_handler(packet, size); 3635 break; 3636 #endif 3637 default: 3638 break; 3639 } 3640 } 3641 3642 /** 3643 * @brief Add event packet handler. 3644 */ 3645 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3646 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3647 } 3648 3649 /** 3650 * @brief Remove event packet handler. 3651 */ 3652 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3653 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3654 } 3655 3656 /** Register HCI packet handlers */ 3657 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3658 hci_stack->acl_packet_handler = handler; 3659 } 3660 3661 #ifdef ENABLE_CLASSIC 3662 /** 3663 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3664 */ 3665 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3666 hci_stack->sco_packet_handler = handler; 3667 } 3668 #endif 3669 3670 static void hci_state_reset(void){ 3671 // no connections yet 3672 hci_stack->connections = NULL; 3673 3674 // keep discoverable/connectable as this has been requested by the client(s) 3675 // hci_stack->discoverable = 0; 3676 // hci_stack->connectable = 0; 3677 // hci_stack->bondable = 1; 3678 // hci_stack->own_addr_type = 0; 3679 3680 // buffer is free 3681 hci_stack->hci_packet_buffer_reserved = false; 3682 3683 // no pending cmds 3684 hci_stack->decline_reason = 0; 3685 3686 hci_stack->secure_connections_active = false; 3687 3688 #ifdef ENABLE_CLASSIC 3689 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3690 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3691 3692 hci_stack->gap_tasks_classic = 3693 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3694 GAP_TASK_SET_CLASS_OF_DEVICE | 3695 GAP_TASK_SET_LOCAL_NAME | 3696 GAP_TASK_SET_EIR_DATA | 3697 GAP_TASK_WRITE_SCAN_ENABLE | 3698 GAP_TASK_WRITE_PAGE_TIMEOUT; 3699 #endif 3700 3701 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3702 hci_stack->classic_read_local_oob_data = false; 3703 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3704 #endif 3705 3706 // LE 3707 #ifdef ENABLE_BLE 3708 memset(hci_stack->le_random_address, 0, 6); 3709 hci_stack->le_random_address_set = 0; 3710 #endif 3711 #ifdef ENABLE_LE_CENTRAL 3712 hci_stack->le_scanning_active = false; 3713 hci_stack->le_scanning_param_update = true; 3714 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3715 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3716 hci_stack->le_whitelist_capacity = 0; 3717 #endif 3718 #ifdef ENABLE_LE_PERIPHERAL 3719 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3720 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3721 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3722 } 3723 if (hci_stack->le_advertisements_data != NULL){ 3724 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3725 } 3726 #endif 3727 } 3728 3729 #ifdef ENABLE_CLASSIC 3730 /** 3731 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3732 */ 3733 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3734 // store and open remote device db 3735 hci_stack->link_key_db = link_key_db; 3736 if (hci_stack->link_key_db) { 3737 hci_stack->link_key_db->open(); 3738 } 3739 } 3740 #endif 3741 3742 void hci_init(const hci_transport_t *transport, const void *config){ 3743 3744 #ifdef HAVE_MALLOC 3745 if (!hci_stack) { 3746 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3747 } 3748 #else 3749 hci_stack = &hci_stack_static; 3750 #endif 3751 memset(hci_stack, 0, sizeof(hci_stack_t)); 3752 3753 // reference to use transport layer implementation 3754 hci_stack->hci_transport = transport; 3755 3756 // reference to used config 3757 hci_stack->config = config; 3758 3759 // setup pointer for outgoing packet buffer 3760 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3761 3762 // max acl payload size defined in config.h 3763 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3764 3765 // register packet handlers with transport 3766 transport->register_packet_handler(&packet_handler); 3767 3768 hci_stack->state = HCI_STATE_OFF; 3769 3770 // class of device 3771 hci_stack->class_of_device = 0x007a020c; // Smartphone 3772 3773 // bondable by default 3774 hci_stack->bondable = 1; 3775 3776 #ifdef ENABLE_CLASSIC 3777 // classic name 3778 hci_stack->local_name = default_classic_name; 3779 3780 // Master slave policy 3781 hci_stack->master_slave_policy = 1; 3782 3783 // Allow Role Switch 3784 hci_stack->allow_role_switch = 1; 3785 3786 // Default / minimum security level = 2 3787 hci_stack->gap_security_level = LEVEL_2; 3788 3789 // Default Security Mode 4 3790 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3791 3792 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3793 hci_stack->gap_required_encyrption_key_size = 7; 3794 3795 // Link Supervision Timeout 3796 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3797 3798 #endif 3799 3800 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3801 hci_stack->ssp_enable = 1; 3802 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3803 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3804 hci_stack->ssp_auto_accept = 1; 3805 3806 // Secure Connections: enable (requires support from Controller) 3807 hci_stack->secure_connections_enable = true; 3808 3809 // voice setting - signed 16 bit pcm data with CVSD over the air 3810 hci_stack->sco_voice_setting = 0x60; 3811 3812 #ifdef ENABLE_LE_CENTRAL 3813 // connection parameter to use for outgoing connections 3814 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3815 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3816 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3817 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3818 hci_stack->le_connection_latency = 4; // 4 3819 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3820 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3821 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3822 3823 // default LE Scanning 3824 hci_stack->le_scan_type = 0x1; // active 3825 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3826 hci_stack->le_scan_window = 0x30; // 30 ms 3827 #endif 3828 3829 #ifdef ENABLE_LE_PERIPHERAL 3830 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3831 #endif 3832 3833 // connection parameter range used to answer connection parameter update requests in l2cap 3834 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3835 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3836 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3837 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3838 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3839 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3840 3841 hci_state_reset(); 3842 } 3843 3844 void hci_deinit(void){ 3845 #ifdef HAVE_MALLOC 3846 if (hci_stack) { 3847 free(hci_stack); 3848 } 3849 #endif 3850 hci_stack = NULL; 3851 3852 #ifdef ENABLE_CLASSIC 3853 disable_l2cap_timeouts = 0; 3854 #endif 3855 } 3856 3857 /** 3858 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3859 */ 3860 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3861 hci_stack->chipset = chipset_driver; 3862 3863 // reset chipset driver - init is also called on power_up 3864 if (hci_stack->chipset && hci_stack->chipset->init){ 3865 hci_stack->chipset->init(hci_stack->config); 3866 } 3867 } 3868 3869 /** 3870 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3871 */ 3872 void hci_set_control(const btstack_control_t *hardware_control){ 3873 // references to used control implementation 3874 hci_stack->control = hardware_control; 3875 // init with transport config 3876 hardware_control->init(hci_stack->config); 3877 } 3878 3879 static void hci_discard_connections(void){ 3880 btstack_linked_list_iterator_t lit; 3881 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3882 while (btstack_linked_list_iterator_has_next(&lit)){ 3883 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3884 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3885 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3886 hci_shutdown_connection(connection); 3887 } 3888 } 3889 3890 void hci_close(void){ 3891 3892 #ifdef ENABLE_CLASSIC 3893 // close remote device db 3894 if (hci_stack->link_key_db) { 3895 hci_stack->link_key_db->close(); 3896 } 3897 #endif 3898 3899 hci_discard_connections(); 3900 3901 hci_power_control(HCI_POWER_OFF); 3902 3903 #ifdef HAVE_MALLOC 3904 free(hci_stack); 3905 #endif 3906 hci_stack = NULL; 3907 } 3908 3909 #ifdef HAVE_SCO_TRANSPORT 3910 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3911 hci_stack->sco_transport = sco_transport; 3912 sco_transport->register_packet_handler(&packet_handler); 3913 } 3914 #endif 3915 3916 #ifdef ENABLE_CLASSIC 3917 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3918 // validate ranage and set 3919 if (encryption_key_size < 7) return; 3920 if (encryption_key_size > 16) return; 3921 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3922 } 3923 3924 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3925 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3926 hci_stack->gap_security_mode = security_mode; 3927 return ERROR_CODE_SUCCESS; 3928 } else { 3929 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3930 } 3931 } 3932 3933 gap_security_mode_t gap_get_security_mode(void){ 3934 return hci_stack->gap_security_mode; 3935 } 3936 3937 void gap_set_security_level(gap_security_level_t security_level){ 3938 hci_stack->gap_security_level = security_level; 3939 } 3940 3941 gap_security_level_t gap_get_security_level(void){ 3942 if (hci_stack->gap_secure_connections_only_mode){ 3943 return LEVEL_4; 3944 } 3945 return hci_stack->gap_security_level; 3946 } 3947 3948 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3949 hci_stack->gap_minimal_service_security_level = security_level; 3950 } 3951 3952 void gap_set_secure_connections_only_mode(bool enable){ 3953 hci_stack->gap_secure_connections_only_mode = enable; 3954 } 3955 3956 bool gap_get_secure_connections_only_mode(void){ 3957 return hci_stack->gap_secure_connections_only_mode; 3958 } 3959 #endif 3960 3961 #ifdef ENABLE_CLASSIC 3962 void gap_set_class_of_device(uint32_t class_of_device){ 3963 hci_stack->class_of_device = class_of_device; 3964 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3965 hci_run(); 3966 } 3967 3968 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3969 hci_stack->default_link_policy_settings = default_link_policy_settings; 3970 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3971 hci_run(); 3972 } 3973 3974 void gap_set_allow_role_switch(bool allow_role_switch){ 3975 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3976 } 3977 3978 uint8_t hci_get_allow_role_switch(void){ 3979 return hci_stack->allow_role_switch; 3980 } 3981 3982 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3983 hci_stack->link_supervision_timeout = link_supervision_timeout; 3984 } 3985 3986 void hci_disable_l2cap_timeout_check(void){ 3987 disable_l2cap_timeouts = 1; 3988 } 3989 #endif 3990 3991 #ifndef HAVE_HOST_CONTROLLER_API 3992 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3993 void hci_set_bd_addr(bd_addr_t addr){ 3994 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3995 hci_stack->custom_bd_addr_set = 1; 3996 } 3997 #endif 3998 3999 // State-Module-Driver overview 4000 // state module low-level 4001 // HCI_STATE_OFF off close 4002 // HCI_STATE_INITIALIZING, on open 4003 // HCI_STATE_WORKING, on open 4004 // HCI_STATE_HALTING, on open 4005 // HCI_STATE_SLEEPING, off/sleep close 4006 // HCI_STATE_FALLING_ASLEEP on open 4007 4008 static int hci_power_control_on(void){ 4009 4010 // power on 4011 int err = 0; 4012 if (hci_stack->control && hci_stack->control->on){ 4013 err = (*hci_stack->control->on)(); 4014 } 4015 if (err){ 4016 log_error( "POWER_ON failed"); 4017 hci_emit_hci_open_failed(); 4018 return err; 4019 } 4020 4021 // int chipset driver 4022 if (hci_stack->chipset && hci_stack->chipset->init){ 4023 hci_stack->chipset->init(hci_stack->config); 4024 } 4025 4026 // init transport 4027 if (hci_stack->hci_transport->init){ 4028 hci_stack->hci_transport->init(hci_stack->config); 4029 } 4030 4031 // open transport 4032 err = hci_stack->hci_transport->open(); 4033 if (err){ 4034 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4035 if (hci_stack->control && hci_stack->control->off){ 4036 (*hci_stack->control->off)(); 4037 } 4038 hci_emit_hci_open_failed(); 4039 return err; 4040 } 4041 return 0; 4042 } 4043 4044 static void hci_power_control_off(void){ 4045 4046 log_info("hci_power_control_off"); 4047 4048 // close low-level device 4049 hci_stack->hci_transport->close(); 4050 4051 log_info("hci_power_control_off - hci_transport closed"); 4052 4053 // power off 4054 if (hci_stack->control && hci_stack->control->off){ 4055 (*hci_stack->control->off)(); 4056 } 4057 4058 log_info("hci_power_control_off - control closed"); 4059 4060 hci_stack->state = HCI_STATE_OFF; 4061 } 4062 4063 static void hci_power_control_sleep(void){ 4064 4065 log_info("hci_power_control_sleep"); 4066 4067 #if 0 4068 // don't close serial port during sleep 4069 4070 // close low-level device 4071 hci_stack->hci_transport->close(hci_stack->config); 4072 #endif 4073 4074 // sleep mode 4075 if (hci_stack->control && hci_stack->control->sleep){ 4076 (*hci_stack->control->sleep)(); 4077 } 4078 4079 hci_stack->state = HCI_STATE_SLEEPING; 4080 } 4081 4082 static int hci_power_control_wake(void){ 4083 4084 log_info("hci_power_control_wake"); 4085 4086 // wake on 4087 if (hci_stack->control && hci_stack->control->wake){ 4088 (*hci_stack->control->wake)(); 4089 } 4090 4091 #if 0 4092 // open low-level device 4093 int err = hci_stack->hci_transport->open(hci_stack->config); 4094 if (err){ 4095 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4096 if (hci_stack->control && hci_stack->control->off){ 4097 (*hci_stack->control->off)(); 4098 } 4099 hci_emit_hci_open_failed(); 4100 return err; 4101 } 4102 #endif 4103 4104 return 0; 4105 } 4106 4107 static void hci_power_transition_to_initializing(void){ 4108 // set up state machine 4109 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4110 hci_stack->hci_packet_buffer_reserved = false; 4111 hci_stack->state = HCI_STATE_INITIALIZING; 4112 hci_stack->substate = HCI_INIT_SEND_RESET; 4113 } 4114 4115 // returns error 4116 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4117 int err; 4118 switch (power_mode){ 4119 case HCI_POWER_ON: 4120 err = hci_power_control_on(); 4121 if (err != 0) { 4122 log_error("hci_power_control_on() error %d", err); 4123 return err; 4124 } 4125 hci_power_transition_to_initializing(); 4126 break; 4127 case HCI_POWER_OFF: 4128 // do nothing 4129 break; 4130 case HCI_POWER_SLEEP: 4131 // do nothing (with SLEEP == OFF) 4132 break; 4133 default: 4134 btstack_assert(false); 4135 break; 4136 } 4137 return ERROR_CODE_SUCCESS; 4138 } 4139 4140 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4141 switch (power_mode){ 4142 case HCI_POWER_ON: 4143 // do nothing 4144 break; 4145 case HCI_POWER_OFF: 4146 // no connections yet, just turn it off 4147 hci_power_control_off(); 4148 break; 4149 case HCI_POWER_SLEEP: 4150 // no connections yet, just turn it off 4151 hci_power_control_sleep(); 4152 break; 4153 default: 4154 btstack_assert(false); 4155 break; 4156 } 4157 return ERROR_CODE_SUCCESS; 4158 } 4159 4160 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4161 switch (power_mode){ 4162 case HCI_POWER_ON: 4163 // do nothing 4164 break; 4165 case HCI_POWER_OFF: 4166 // see hci_run 4167 hci_stack->state = HCI_STATE_HALTING; 4168 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4169 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4170 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4171 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4172 btstack_run_loop_add_timer(&hci_stack->timeout); 4173 break; 4174 case HCI_POWER_SLEEP: 4175 // see hci_run 4176 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4177 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4178 break; 4179 default: 4180 btstack_assert(false); 4181 break; 4182 } 4183 return ERROR_CODE_SUCCESS; 4184 } 4185 4186 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4187 switch (power_mode){ 4188 case HCI_POWER_ON: 4189 hci_power_transition_to_initializing(); 4190 break; 4191 case HCI_POWER_OFF: 4192 // do nothing 4193 break; 4194 case HCI_POWER_SLEEP: 4195 // see hci_run 4196 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4197 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4198 break; 4199 default: 4200 btstack_assert(false); 4201 break; 4202 } 4203 return ERROR_CODE_SUCCESS; 4204 } 4205 4206 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4207 switch (power_mode){ 4208 case HCI_POWER_ON: 4209 hci_power_transition_to_initializing(); 4210 break; 4211 case HCI_POWER_OFF: 4212 // see hci_run 4213 hci_stack->state = HCI_STATE_HALTING; 4214 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4215 break; 4216 case HCI_POWER_SLEEP: 4217 // do nothing 4218 break; 4219 default: 4220 btstack_assert(false); 4221 break; 4222 } 4223 return ERROR_CODE_SUCCESS; 4224 } 4225 4226 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4227 int err; 4228 switch (power_mode){ 4229 case HCI_POWER_ON: 4230 err = hci_power_control_wake(); 4231 if (err) return err; 4232 hci_power_transition_to_initializing(); 4233 break; 4234 case HCI_POWER_OFF: 4235 hci_stack->state = HCI_STATE_HALTING; 4236 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4237 break; 4238 case HCI_POWER_SLEEP: 4239 // do nothing 4240 break; 4241 default: 4242 btstack_assert(false); 4243 break; 4244 } 4245 return ERROR_CODE_SUCCESS; 4246 } 4247 4248 int hci_power_control(HCI_POWER_MODE power_mode){ 4249 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4250 int err = 0; 4251 switch (hci_stack->state){ 4252 case HCI_STATE_OFF: 4253 err = hci_power_control_state_off(power_mode); 4254 break; 4255 case HCI_STATE_INITIALIZING: 4256 err = hci_power_control_state_initializing(power_mode); 4257 break; 4258 case HCI_STATE_WORKING: 4259 err = hci_power_control_state_working(power_mode); 4260 break; 4261 case HCI_STATE_HALTING: 4262 err = hci_power_control_state_halting(power_mode); 4263 break; 4264 case HCI_STATE_FALLING_ASLEEP: 4265 err = hci_power_control_state_falling_asleep(power_mode); 4266 break; 4267 case HCI_STATE_SLEEPING: 4268 err = hci_power_control_state_sleeping(power_mode); 4269 break; 4270 default: 4271 btstack_assert(false); 4272 break; 4273 } 4274 if (err != 0){ 4275 return err; 4276 } 4277 4278 // create internal event 4279 hci_emit_state(); 4280 4281 // trigger next/first action 4282 hci_run(); 4283 4284 return 0; 4285 } 4286 4287 4288 static void hci_halting_run(void) { 4289 4290 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4291 4292 hci_connection_t *connection; 4293 4294 switch (hci_stack->substate) { 4295 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4296 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4297 4298 #ifdef ENABLE_BLE 4299 #ifdef ENABLE_LE_CENTRAL 4300 hci_whitelist_free(); 4301 #endif 4302 #endif 4303 // close all open connections 4304 connection = (hci_connection_t *) hci_stack->connections; 4305 if (connection) { 4306 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4307 if (!hci_can_send_command_packet_now()) return; 4308 4309 // check state 4310 if (connection->state == SENT_DISCONNECT) return; 4311 connection->state = SENT_DISCONNECT; 4312 4313 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4314 4315 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4316 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4317 4318 // ... which would be ignored anyway as we shutdown (free) the connection now 4319 hci_shutdown_connection(connection); 4320 4321 // finally, send the disconnect command 4322 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4323 return; 4324 } 4325 4326 btstack_run_loop_remove_timer(&hci_stack->timeout); 4327 4328 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4329 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4330 log_info("HCI_STATE_HALTING: wait 50 ms"); 4331 hci_stack->substate = HCI_HALTING_W4_TIMER; 4332 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4333 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4334 btstack_run_loop_add_timer(&hci_stack->timeout); 4335 break; 4336 } 4337 4338 /* fall through */ 4339 4340 case HCI_HALTING_CLOSE: 4341 // close left over connections (that had not been properly closed before) 4342 hci_discard_connections(); 4343 4344 log_info("HCI_STATE_HALTING, calling off"); 4345 4346 // switch mode 4347 hci_power_control_off(); 4348 4349 log_info("HCI_STATE_HALTING, emitting state"); 4350 hci_emit_state(); 4351 log_info("HCI_STATE_HALTING, done"); 4352 break; 4353 4354 case HCI_HALTING_W4_TIMER: 4355 // keep waiting 4356 4357 break; 4358 default: 4359 break; 4360 } 4361 }; 4362 4363 static void hci_falling_asleep_run(void){ 4364 hci_connection_t * connection; 4365 switch(hci_stack->substate) { 4366 case HCI_FALLING_ASLEEP_DISCONNECT: 4367 log_info("HCI_STATE_FALLING_ASLEEP"); 4368 // close all open connections 4369 connection = (hci_connection_t *) hci_stack->connections; 4370 if (connection){ 4371 4372 // send disconnect 4373 if (!hci_can_send_command_packet_now()) return; 4374 4375 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4376 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4377 4378 // send disconnected event right away - causes higher layer connections to get closed, too. 4379 hci_shutdown_connection(connection); 4380 return; 4381 } 4382 4383 if (hci_classic_supported()){ 4384 // disable page and inquiry scan 4385 if (!hci_can_send_command_packet_now()) return; 4386 4387 log_info("HCI_STATE_HALTING, disabling inq scans"); 4388 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4389 4390 // continue in next sub state 4391 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4392 break; 4393 } 4394 4395 /* fall through */ 4396 4397 case HCI_FALLING_ASLEEP_COMPLETE: 4398 log_info("HCI_STATE_HALTING, calling sleep"); 4399 // switch mode 4400 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4401 hci_emit_state(); 4402 break; 4403 4404 default: 4405 break; 4406 } 4407 } 4408 4409 #ifdef ENABLE_CLASSIC 4410 4411 static void hci_update_scan_enable(void){ 4412 // 2 = page scan, 1 = inq scan 4413 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4414 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4415 hci_run(); 4416 } 4417 4418 void gap_discoverable_control(uint8_t enable){ 4419 if (enable) enable = 1; // normalize argument 4420 4421 if (hci_stack->discoverable == enable){ 4422 hci_emit_discoverable_enabled(hci_stack->discoverable); 4423 return; 4424 } 4425 4426 hci_stack->discoverable = enable; 4427 hci_update_scan_enable(); 4428 } 4429 4430 void gap_connectable_control(uint8_t enable){ 4431 if (enable) enable = 1; // normalize argument 4432 4433 // don't emit event 4434 if (hci_stack->connectable == enable) return; 4435 4436 hci_stack->connectable = enable; 4437 hci_update_scan_enable(); 4438 } 4439 #endif 4440 4441 void gap_local_bd_addr(bd_addr_t address_buffer){ 4442 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4443 } 4444 4445 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4446 static void hci_host_num_completed_packets(void){ 4447 4448 // create packet manually as arrays are not supported and num_commands should not get reduced 4449 hci_reserve_packet_buffer(); 4450 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4451 4452 uint16_t size = 0; 4453 uint16_t num_handles = 0; 4454 packet[size++] = 0x35; 4455 packet[size++] = 0x0c; 4456 size++; // skip param len 4457 size++; // skip num handles 4458 4459 // add { handle, packets } entries 4460 btstack_linked_item_t * it; 4461 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4462 hci_connection_t * connection = (hci_connection_t *) it; 4463 if (connection->num_packets_completed){ 4464 little_endian_store_16(packet, size, connection->con_handle); 4465 size += 2; 4466 little_endian_store_16(packet, size, connection->num_packets_completed); 4467 size += 2; 4468 // 4469 num_handles++; 4470 connection->num_packets_completed = 0; 4471 } 4472 } 4473 4474 packet[2] = size - 3; 4475 packet[3] = num_handles; 4476 4477 hci_stack->host_completed_packets = 0; 4478 4479 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4480 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4481 4482 // release packet buffer for synchronous transport implementations 4483 if (hci_transport_synchronous()){ 4484 hci_release_packet_buffer(); 4485 hci_emit_transport_packet_sent(); 4486 } 4487 } 4488 #endif 4489 4490 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4491 UNUSED(ds); 4492 hci_stack->substate = HCI_HALTING_CLOSE; 4493 // allow packet handlers to defer final shutdown 4494 hci_emit_state(); 4495 hci_run(); 4496 } 4497 4498 static bool hci_run_acl_fragments(void){ 4499 if (hci_stack->acl_fragmentation_total_size > 0u) { 4500 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4501 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4502 if (connection) { 4503 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4504 hci_send_acl_packet_fragments(connection); 4505 return true; 4506 } 4507 } else { 4508 // connection gone -> discard further fragments 4509 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4510 hci_stack->acl_fragmentation_total_size = 0; 4511 hci_stack->acl_fragmentation_pos = 0; 4512 } 4513 } 4514 return false; 4515 } 4516 4517 #ifdef ENABLE_CLASSIC 4518 static bool hci_run_general_gap_classic(void){ 4519 4520 // assert stack is working and classic is active 4521 if (hci_classic_supported() == false) return false; 4522 if (hci_stack->state != HCI_STATE_WORKING) return false; 4523 4524 // decline incoming connections 4525 if (hci_stack->decline_reason){ 4526 uint8_t reason = hci_stack->decline_reason; 4527 hci_stack->decline_reason = 0; 4528 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4529 return true; 4530 } 4531 4532 if (hci_stack->gap_tasks_classic != 0){ 4533 hci_run_gap_tasks_classic(); 4534 return true; 4535 } 4536 4537 // start/stop inquiry 4538 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4539 uint8_t duration = hci_stack->inquiry_state; 4540 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4541 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4542 return true; 4543 } 4544 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4545 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4546 hci_send_cmd(&hci_inquiry_cancel); 4547 return true; 4548 } 4549 // remote name request 4550 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4551 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4552 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4553 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4554 return true; 4555 } 4556 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4557 // Local OOB data 4558 if (hci_stack->classic_read_local_oob_data){ 4559 hci_stack->classic_read_local_oob_data = false; 4560 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4561 hci_send_cmd(&hci_read_local_extended_oob_data); 4562 } else { 4563 hci_send_cmd(&hci_read_local_oob_data); 4564 } 4565 } 4566 #endif 4567 // pairing 4568 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4569 uint8_t state = hci_stack->gap_pairing_state; 4570 uint8_t pin_code[16]; 4571 switch (state){ 4572 case GAP_PAIRING_STATE_SEND_PIN: 4573 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4574 memset(pin_code, 0, 16); 4575 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4576 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4577 break; 4578 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4579 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4580 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4581 break; 4582 case GAP_PAIRING_STATE_SEND_PASSKEY: 4583 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4584 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4585 break; 4586 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4587 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4588 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4589 break; 4590 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4591 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4592 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4593 break; 4594 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4595 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4596 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4597 break; 4598 default: 4599 break; 4600 } 4601 return true; 4602 } 4603 return false; 4604 } 4605 #endif 4606 4607 #ifdef ENABLE_BLE 4608 4609 #ifdef ENABLE_LE_PERIPHERAL 4610 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4611 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4612 uint8_t operation = 0; 4613 if (pos == 0){ 4614 // first fragment or complete data 4615 operation |= 1; 4616 } 4617 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4618 // last fragment or complete data 4619 operation |= 2; 4620 } 4621 return operation; 4622 } 4623 #endif 4624 #endif 4625 4626 static bool hci_run_general_gap_le(void){ 4627 4628 // Phase 1: collect what to stop 4629 4630 bool scanning_stop = false; 4631 bool connecting_stop = false; 4632 bool advertising_stop = false; 4633 4634 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4635 le_advertising_set_t * advertising_stop_set = NULL; 4636 #endif 4637 4638 #ifndef ENABLE_LE_CENTRAL 4639 UNUSED(scanning_stop); 4640 UNUSED(connecting_stop); 4641 #endif 4642 #ifndef ENABLE_LE_PERIPHERAL 4643 UNUSED(advertising_stop); 4644 #endif 4645 4646 // check if own address changes 4647 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4648 4649 // check if whitelist needs modification 4650 bool whitelist_modification_pending = false; 4651 btstack_linked_list_iterator_t lit; 4652 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4653 while (btstack_linked_list_iterator_has_next(&lit)){ 4654 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4655 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4656 whitelist_modification_pending = true; 4657 break; 4658 } 4659 } 4660 // check if resolving list needs modification 4661 bool resolving_list_modification_pending = false; 4662 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4663 4664 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4665 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4666 resolving_list_modification_pending = true; 4667 } 4668 #endif 4669 4670 #ifdef ENABLE_LE_CENTRAL 4671 // scanning control 4672 if (hci_stack->le_scanning_active) { 4673 // stop if: 4674 // - parameter change required 4675 // - it's disabled 4676 // - whitelist change required but used for scanning 4677 // - resolving list modified 4678 // - own address changes 4679 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4680 if ((hci_stack->le_scanning_param_update) || 4681 !hci_stack->le_scanning_enabled || 4682 scanning_uses_whitelist || 4683 resolving_list_modification_pending || 4684 random_address_change){ 4685 4686 scanning_stop = true; 4687 } 4688 } 4689 #endif 4690 4691 #ifdef ENABLE_LE_CENTRAL 4692 // connecting control 4693 bool connecting_with_whitelist; 4694 switch (hci_stack->le_connecting_state){ 4695 case LE_CONNECTING_DIRECT: 4696 case LE_CONNECTING_WHITELIST: 4697 // stop connecting if: 4698 // - connecting uses white and whitelist modification pending 4699 // - if it got disabled 4700 // - resolving list modified 4701 // - own address changes 4702 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4703 if ((connecting_with_whitelist && whitelist_modification_pending) || 4704 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4705 resolving_list_modification_pending || 4706 random_address_change) { 4707 4708 connecting_stop = true; 4709 } 4710 break; 4711 default: 4712 break; 4713 } 4714 #endif 4715 4716 #ifdef ENABLE_LE_PERIPHERAL 4717 // le advertisement control 4718 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4719 // stop if: 4720 // - parameter change required 4721 // - random address used in advertising and changes 4722 // - it's disabled 4723 // - whitelist change required but used for advertisement filter policy 4724 // - resolving list modified 4725 // - own address changes 4726 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4727 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4728 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4729 if (advertising_change || 4730 (advertising_uses_random_address && random_address_change) || 4731 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4732 (advertising_uses_whitelist && whitelist_modification_pending) || 4733 resolving_list_modification_pending || 4734 random_address_change) { 4735 4736 advertising_stop = true; 4737 } 4738 } 4739 4740 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4741 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4742 btstack_linked_list_iterator_t it; 4743 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4744 while (btstack_linked_list_iterator_has_next(&it)){ 4745 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4746 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0) continue; 4747 // stop if: 4748 // - parameter change required 4749 // - random address used in connectable advertising and changes 4750 // - it's disabled 4751 // - whitelist change required but used for advertisement filter policy 4752 // - resolving list modified 4753 // - own address changes 4754 // - advertisement set will be removed 4755 bool advertising_uses_whitelist = advertising_set->params.advertising_filter_policy != 0; 4756 bool advertising_connectable = (advertising_set->params.advertising_event_properties & 1) != 0; 4757 bool advertising_uses_random_address = (advertising_set->params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && advertising_connectable; 4758 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4759 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4760 bool advertising_set_random_address_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4761 bool advertising_set_will_be_removed = (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4762 if (advertising_parameter_change || 4763 (advertising_uses_random_address && advertising_set_random_address_change) || 4764 (advertising_enabled == false) || 4765 (advertising_uses_whitelist && whitelist_modification_pending) || 4766 resolving_list_modification_pending || 4767 advertising_set_will_be_removed) { 4768 4769 advertising_stop = true; 4770 advertising_stop_set = advertising_set; 4771 break; 4772 } 4773 } 4774 } 4775 #endif 4776 4777 #endif 4778 4779 4780 // Phase 2: stop everything that should be off during modifications 4781 4782 #ifdef ENABLE_LE_CENTRAL 4783 if (scanning_stop){ 4784 hci_stack->le_scanning_active = false; 4785 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4786 if (hci_extended_advertising_supported()) { 4787 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4788 } else 4789 #endif 4790 { 4791 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4792 } 4793 return true; 4794 } 4795 #endif 4796 4797 #ifdef ENABLE_LE_CENTRAL 4798 if (connecting_stop){ 4799 hci_send_cmd(&hci_le_create_connection_cancel); 4800 return true; 4801 } 4802 #endif 4803 4804 #ifdef ENABLE_LE_PERIPHERAL 4805 if (advertising_stop){ 4806 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4807 if (hci_extended_advertising_supported()) { 4808 uint8_t advertising_stop_handle; 4809 if (advertising_stop_set != NULL){ 4810 advertising_stop_handle = advertising_stop_set->advertising_handle; 4811 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4812 } else { 4813 advertising_stop_handle = 0; 4814 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4815 } 4816 const uint8_t advertising_handles[] = { advertising_stop_handle }; 4817 const uint16_t durations[] = { 0 }; 4818 const uint16_t max_events[] = { 0 }; 4819 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 4820 } else 4821 #endif 4822 { 4823 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4824 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4825 } 4826 return true; 4827 } 4828 #endif 4829 4830 // Phase 3: modify 4831 4832 if (random_address_change){ 4833 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4834 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4835 if (hci_extended_advertising_supported()) { 4836 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 4837 } 4838 #endif 4839 { 4840 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4841 } 4842 return true; 4843 } 4844 4845 #ifdef ENABLE_LE_CENTRAL 4846 if (hci_stack->le_scanning_param_update){ 4847 hci_stack->le_scanning_param_update = false; 4848 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4849 if (hci_extended_advertising_supported()){ 4850 // prepare arrays for all PHYs 4851 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 4852 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 4853 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 4854 uint8_t scanning_phys = 1; // LE 1M PHY 4855 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 4856 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 4857 } else 4858 #endif 4859 { 4860 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4861 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4862 } 4863 return true; 4864 } 4865 #endif 4866 4867 #ifdef ENABLE_LE_PERIPHERAL 4868 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4869 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4870 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4871 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4872 if (hci_extended_advertising_supported()){ 4873 // map advertisment type to advertising event properties 4874 uint16_t adv_event_properties = 0; 4875 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 4876 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 4877 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 4878 } 4879 hci_stack->le_advertising_set_in_current_command = 0; 4880 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 4881 0, 4882 adv_event_properties, 4883 hci_stack->le_advertisements_interval_min, 4884 hci_stack->le_advertisements_interval_max, 4885 hci_stack->le_advertisements_channel_map, 4886 hci_stack->le_advertisements_own_addr_type, 4887 hci_stack->le_advertisements_direct_address_type, 4888 hci_stack->le_advertisements_direct_address, 4889 hci_stack->le_advertisements_filter_policy, 4890 0x7f, // tx power: no preference 4891 0x01, // primary adv phy: LE 1M 4892 0, // secondary adv max skip 4893 0, // secondary adv phy 4894 0, // adv sid 4895 0 // scan request notification 4896 ); 4897 } 4898 #endif 4899 { 4900 hci_send_cmd(&hci_le_set_advertising_parameters, 4901 hci_stack->le_advertisements_interval_min, 4902 hci_stack->le_advertisements_interval_max, 4903 hci_stack->le_advertisements_type, 4904 hci_stack->le_advertisements_own_addr_type, 4905 hci_stack->le_advertisements_direct_address_type, 4906 hci_stack->le_advertisements_direct_address, 4907 hci_stack->le_advertisements_channel_map, 4908 hci_stack->le_advertisements_filter_policy); 4909 } 4910 return true; 4911 } 4912 4913 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4914 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4915 uint8_t adv_data_clean[31]; 4916 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4917 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4918 hci_stack->le_advertisements_data_len); 4919 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4920 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4921 if (hci_extended_advertising_supported()){ 4922 hci_stack->le_advertising_set_in_current_command = 0; 4923 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 4924 } else 4925 #endif 4926 { 4927 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4928 } 4929 return true; 4930 } 4931 4932 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4933 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4934 uint8_t scan_data_clean[31]; 4935 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4936 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4937 hci_stack->le_scan_response_data_len); 4938 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4939 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4940 if (hci_extended_advertising_supported()){ 4941 hci_stack->le_advertising_set_in_current_command = 0; 4942 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 4943 } else 4944 #endif 4945 { 4946 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4947 } 4948 return true; 4949 } 4950 4951 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4952 if (hci_extended_advertising_supported()) { 4953 btstack_linked_list_iterator_t it; 4954 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4955 while (btstack_linked_list_iterator_has_next(&it)){ 4956 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4957 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 4958 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 4959 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 4960 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 4961 return true; 4962 } 4963 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 4964 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4965 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 4966 return true; 4967 } 4968 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 4969 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4970 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 4971 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 4972 advertising_set->advertising_handle, 4973 advertising_set->params.advertising_event_properties, 4974 advertising_set->params.primary_advertising_interval_min, 4975 advertising_set->params.primary_advertising_interval_max, 4976 advertising_set->params.primary_advertising_channel_map, 4977 advertising_set->params.own_address_type, 4978 advertising_set->params.peer_address_type, 4979 advertising_set->params.peer_address, 4980 advertising_set->params.advertising_filter_policy, 4981 advertising_set->params.advertising_tx_power, 4982 advertising_set->params.primary_advertising_phy, 4983 advertising_set->params.secondary_advertising_max_skip, 4984 advertising_set->params.secondary_advertising_phy, 4985 advertising_set->params.advertising_sid, 4986 advertising_set->params.scan_request_notification_enable 4987 ); 4988 return true; 4989 } 4990 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 4991 uint16_t pos = advertising_set->adv_data_pos; 4992 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 4993 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 4994 if ((operation & 0x02) != 0){ 4995 // last fragment or complete data 4996 operation |= 2; 4997 advertising_set->adv_data_pos = 0; 4998 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4999 } else { 5000 advertising_set->adv_data_pos += data_to_upload; 5001 } 5002 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5003 hci_send_cmd(&hci_le_set_extended_advertising_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5004 return true; 5005 } 5006 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5007 uint16_t pos = advertising_set->scan_data_pos; 5008 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5009 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5010 if ((operation & 0x02) != 0){ 5011 advertising_set->scan_data_pos = 0; 5012 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5013 } else { 5014 advertising_set->scan_data_pos += data_to_upload; 5015 } 5016 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5017 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5018 return true; 5019 } 5020 } 5021 } 5022 #endif 5023 5024 5025 #endif 5026 5027 5028 #ifdef ENABLE_LE_CENTRAL 5029 // if connect with whitelist was active and is not cancelled yet, wait until next time 5030 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5031 #endif 5032 5033 // LE Whitelist Management 5034 if (whitelist_modification_pending){ 5035 // add/remove entries 5036 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5037 while (btstack_linked_list_iterator_has_next(&lit)){ 5038 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5039 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5040 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5041 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5042 return true; 5043 } 5044 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5045 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5046 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5047 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5048 return true; 5049 } 5050 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5051 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5052 btstack_memory_whitelist_entry_free(entry); 5053 } 5054 } 5055 } 5056 5057 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5058 // LE Resolving List Management 5059 if (resolving_list_supported) { 5060 uint16_t i; 5061 switch (hci_stack->le_resolving_list_state) { 5062 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5063 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5064 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5065 return true; 5066 case LE_RESOLVING_LIST_READ_SIZE: 5067 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5068 hci_send_cmd(&hci_le_read_resolving_list_size); 5069 return true; 5070 case LE_RESOLVING_LIST_SEND_CLEAR: 5071 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5072 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5073 sizeof(hci_stack->le_resolving_list_add_entries)); 5074 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5075 sizeof(hci_stack->le_resolving_list_remove_entries)); 5076 hci_send_cmd(&hci_le_clear_resolving_list); 5077 return true; 5078 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5079 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5080 uint8_t offset = i >> 3; 5081 uint8_t mask = 1 << (i & 7); 5082 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5083 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5084 bd_addr_t peer_identity_addreses; 5085 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5086 sm_key_t peer_irk; 5087 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5088 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5089 5090 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5091 // trigger whitelist entry 'update' (work around for controller bug) 5092 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5093 while (btstack_linked_list_iterator_has_next(&lit)) { 5094 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5095 if (entry->address_type != peer_identity_addr_type) continue; 5096 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5097 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5098 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5099 } 5100 #endif 5101 5102 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5103 peer_identity_addreses); 5104 return true; 5105 } 5106 5107 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5108 5109 /* fall through */ 5110 5111 case LE_RESOLVING_LIST_ADD_ENTRIES: 5112 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5113 uint8_t offset = i >> 3; 5114 uint8_t mask = 1 << (i & 7); 5115 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5116 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5117 bd_addr_t peer_identity_addreses; 5118 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5119 sm_key_t peer_irk; 5120 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5121 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5122 const uint8_t *local_irk = gap_get_persistent_irk(); 5123 // command uses format specifier 'P' that stores 16-byte value without flip 5124 uint8_t local_irk_flipped[16]; 5125 uint8_t peer_irk_flipped[16]; 5126 reverse_128(local_irk, local_irk_flipped); 5127 reverse_128(peer_irk, peer_irk_flipped); 5128 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5129 peer_irk_flipped, local_irk_flipped); 5130 return true; 5131 } 5132 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5133 break; 5134 5135 default: 5136 break; 5137 } 5138 } 5139 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5140 #endif 5141 5142 // post-pone all actions until stack is fully working 5143 if (hci_stack->state != HCI_STATE_WORKING) return false; 5144 5145 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5146 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5147 5148 // Phase 4: restore state 5149 5150 #ifdef ENABLE_LE_CENTRAL 5151 // re-start scanning 5152 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5153 hci_stack->le_scanning_active = true; 5154 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5155 if (hci_extended_advertising_supported()){ 5156 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5157 } else 5158 #endif 5159 { 5160 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5161 } 5162 return true; 5163 } 5164 #endif 5165 5166 #ifdef ENABLE_LE_CENTRAL 5167 // re-start connecting 5168 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5169 bd_addr_t null_addr; 5170 memset(null_addr, 0, 6); 5171 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5172 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5173 hci_send_cmd(&hci_le_create_connection, 5174 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5175 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5176 1, // use whitelist 5177 0, // peer address type 5178 null_addr, // peer bd addr 5179 hci_stack->le_connection_own_addr_type, // our addr type: 5180 hci_stack->le_connection_interval_min, // conn interval min 5181 hci_stack->le_connection_interval_max, // conn interval max 5182 hci_stack->le_connection_latency, // conn latency 5183 hci_stack->le_supervision_timeout, // conn latency 5184 hci_stack->le_minimum_ce_length, // min ce length 5185 hci_stack->le_maximum_ce_length // max ce length 5186 ); 5187 return true; 5188 } 5189 #endif 5190 5191 #ifdef ENABLE_LE_PERIPHERAL 5192 // re-start advertising 5193 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5194 // check if advertisements should be enabled given 5195 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5196 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5197 5198 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5199 if (hci_extended_advertising_supported()){ 5200 const uint8_t advertising_handles[] = { 0 }; 5201 const uint16_t durations[] = { 0 }; 5202 const uint16_t max_events[] = { 0 }; 5203 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5204 } else 5205 #endif 5206 { 5207 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5208 } 5209 return true; 5210 } 5211 5212 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5213 if (hci_extended_advertising_supported()) { 5214 btstack_linked_list_iterator_t it; 5215 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5216 while (btstack_linked_list_iterator_has_next(&it)) { 5217 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5218 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5219 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5220 const uint16_t durations[] = { advertising_set->enable_timeout }; 5221 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5222 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5223 return true; 5224 } 5225 } 5226 } 5227 #endif 5228 #endif 5229 5230 return false; 5231 } 5232 #endif 5233 5234 static bool hci_run_general_pending_commands(void){ 5235 btstack_linked_item_t * it; 5236 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5237 hci_connection_t * connection = (hci_connection_t *) it; 5238 5239 switch(connection->state){ 5240 case SEND_CREATE_CONNECTION: 5241 switch(connection->address_type){ 5242 #ifdef ENABLE_CLASSIC 5243 case BD_ADDR_TYPE_ACL: 5244 log_info("sending hci_create_connection"); 5245 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5246 break; 5247 #endif 5248 default: 5249 #ifdef ENABLE_BLE 5250 #ifdef ENABLE_LE_CENTRAL 5251 log_info("sending hci_le_create_connection"); 5252 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5253 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5254 hci_send_cmd(&hci_le_create_connection, 5255 hci_stack->le_connection_scan_interval, // conn scan interval 5256 hci_stack->le_connection_scan_window, // conn scan windows 5257 0, // don't use whitelist 5258 connection->address_type, // peer address type 5259 connection->address, // peer bd addr 5260 hci_stack->le_connection_own_addr_type, // our addr type: 5261 hci_stack->le_connection_interval_min, // conn interval min 5262 hci_stack->le_connection_interval_max, // conn interval max 5263 hci_stack->le_connection_latency, // conn latency 5264 hci_stack->le_supervision_timeout, // conn latency 5265 hci_stack->le_minimum_ce_length, // min ce length 5266 hci_stack->le_maximum_ce_length // max ce length 5267 ); 5268 connection->state = SENT_CREATE_CONNECTION; 5269 #endif 5270 #endif 5271 break; 5272 } 5273 return true; 5274 5275 #ifdef ENABLE_CLASSIC 5276 case RECEIVED_CONNECTION_REQUEST: 5277 connection->role = HCI_ROLE_SLAVE; 5278 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5279 log_info("sending hci_accept_connection_request"); 5280 connection->state = ACCEPTED_CONNECTION_REQUEST; 5281 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5282 return true; 5283 } 5284 break; 5285 #endif 5286 5287 #ifdef ENABLE_BLE 5288 #ifdef ENABLE_LE_CENTRAL 5289 case SEND_CANCEL_CONNECTION: 5290 connection->state = SENT_CANCEL_CONNECTION; 5291 hci_send_cmd(&hci_le_create_connection_cancel); 5292 return true; 5293 #endif 5294 #endif 5295 case SEND_DISCONNECT: 5296 connection->state = SENT_DISCONNECT; 5297 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5298 return true; 5299 5300 default: 5301 break; 5302 } 5303 5304 // no further commands if connection is about to get shut down 5305 if (connection->state == SENT_DISCONNECT) continue; 5306 5307 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 5308 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 5309 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5310 return true; 5311 } 5312 5313 #ifdef ENABLE_CLASSIC 5314 5315 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 5316 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 5317 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5318 return true; 5319 } 5320 5321 // Handling link key request requires remote supported features 5322 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5323 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5324 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5325 5326 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5327 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5328 if (have_link_key && security_level_sufficient){ 5329 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5330 } else { 5331 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5332 } 5333 return true; 5334 } 5335 5336 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5337 log_info("denying to pin request"); 5338 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5339 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5340 return true; 5341 } 5342 5343 // security assessment requires remote features 5344 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5345 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5346 hci_ssp_assess_security_on_io_cap_request(connection); 5347 // 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 5348 } 5349 5350 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5351 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5352 // set authentication requirements: 5353 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5354 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5355 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5356 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5357 authreq |= 1; 5358 } 5359 bool bonding = hci_stack->bondable; 5360 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5361 // if we have received IO Cap Response, we're in responder role 5362 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5363 if (bonding && !remote_bonding){ 5364 log_info("Remote not bonding, dropping local flag"); 5365 bonding = false; 5366 } 5367 } 5368 if (bonding){ 5369 if (connection->bonding_flags & BONDING_DEDICATED){ 5370 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5371 } else { 5372 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5373 } 5374 } 5375 uint8_t have_oob_data = 0; 5376 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5377 if (connection->classic_oob_c_192 != NULL){ 5378 have_oob_data |= 1; 5379 } 5380 if (connection->classic_oob_c_256 != NULL){ 5381 have_oob_data |= 2; 5382 } 5383 #endif 5384 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5385 return true; 5386 } 5387 5388 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5389 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5390 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5391 return true; 5392 } 5393 5394 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5395 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5396 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5397 const uint8_t zero[16] = { 0 }; 5398 const uint8_t * r_192 = zero; 5399 const uint8_t * c_192 = zero; 5400 const uint8_t * r_256 = zero; 5401 const uint8_t * c_256 = zero; 5402 // verify P-256 OOB 5403 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5404 c_256 = connection->classic_oob_c_256; 5405 if (connection->classic_oob_r_256 != NULL) { 5406 r_256 = connection->classic_oob_r_256; 5407 } 5408 } 5409 // verify P-192 OOB 5410 if ((connection->classic_oob_c_192 != NULL)) { 5411 c_192 = connection->classic_oob_c_192; 5412 if (connection->classic_oob_r_192 != NULL) { 5413 r_192 = connection->classic_oob_r_192; 5414 } 5415 } 5416 5417 // assess security 5418 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5419 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5420 if (need_level_4 && !can_reach_level_4){ 5421 log_info("Level 4 required, but not possible -> abort"); 5422 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5423 // send oob negative reply 5424 c_256 = NULL; 5425 c_192 = NULL; 5426 } 5427 5428 // Reply 5429 if (c_256 != zero) { 5430 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5431 } else if (c_192 != zero){ 5432 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5433 } else { 5434 hci_stack->classic_oob_con_handle = connection->con_handle; 5435 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5436 } 5437 return true; 5438 } 5439 #endif 5440 5441 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5442 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5443 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5444 return true; 5445 } 5446 5447 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5448 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5449 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5450 return true; 5451 } 5452 5453 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5454 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5455 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5456 return true; 5457 } 5458 5459 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5460 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5461 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5462 connection->state = SENT_DISCONNECT; 5463 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5464 return true; 5465 } 5466 5467 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5468 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5469 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5470 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5471 return true; 5472 } 5473 5474 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5475 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5476 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5477 return true; 5478 } 5479 5480 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5481 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5482 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5483 return true; 5484 } 5485 5486 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5487 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5488 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5489 return true; 5490 } 5491 5492 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5493 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5494 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5495 return true; 5496 } 5497 5498 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5499 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5500 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5501 return true; 5502 } 5503 #endif 5504 5505 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5506 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5507 #ifdef ENABLE_CLASSIC 5508 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5509 #endif 5510 if (connection->state != SENT_DISCONNECT){ 5511 connection->state = SENT_DISCONNECT; 5512 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5513 return true; 5514 } 5515 } 5516 5517 #ifdef ENABLE_CLASSIC 5518 uint16_t sniff_min_interval; 5519 switch (connection->sniff_min_interval){ 5520 case 0: 5521 break; 5522 case 0xffff: 5523 connection->sniff_min_interval = 0; 5524 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5525 return true; 5526 default: 5527 sniff_min_interval = connection->sniff_min_interval; 5528 connection->sniff_min_interval = 0; 5529 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5530 return true; 5531 } 5532 5533 if (connection->sniff_subrating_max_latency != 0xffff){ 5534 uint16_t max_latency = connection->sniff_subrating_max_latency; 5535 connection->sniff_subrating_max_latency = 0; 5536 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5537 return true; 5538 } 5539 5540 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5541 uint8_t service_type = (uint8_t) connection->qos_service_type; 5542 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5543 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); 5544 return true; 5545 } 5546 5547 if (connection->request_role != HCI_ROLE_INVALID){ 5548 hci_role_t role = connection->request_role; 5549 connection->request_role = HCI_ROLE_INVALID; 5550 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5551 return true; 5552 } 5553 #endif 5554 5555 #ifdef ENABLE_BLE 5556 switch (connection->le_con_parameter_update_state){ 5557 // response to L2CAP CON PARAMETER UPDATE REQUEST 5558 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5559 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5560 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5561 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5562 0x0000, 0xffff); 5563 return true; 5564 case CON_PARAMETER_UPDATE_REPLY: 5565 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5566 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5567 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5568 0x0000, 0xffff); 5569 return true; 5570 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5571 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5572 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5573 return true; 5574 default: 5575 break; 5576 } 5577 if (connection->le_phy_update_all_phys != 0xffu){ 5578 uint8_t all_phys = connection->le_phy_update_all_phys; 5579 connection->le_phy_update_all_phys = 0xff; 5580 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); 5581 return true; 5582 } 5583 #endif 5584 } 5585 return false; 5586 } 5587 5588 static void hci_run(void){ 5589 5590 // stack state sub statemachines 5591 // halting needs to be called even if we cannot send command packet now 5592 switch (hci_stack->state) { 5593 case HCI_STATE_INITIALIZING: 5594 hci_initializing_run(); 5595 break; 5596 case HCI_STATE_HALTING: 5597 hci_halting_run(); 5598 break; 5599 case HCI_STATE_FALLING_ASLEEP: 5600 hci_falling_asleep_run(); 5601 break; 5602 default: 5603 break; 5604 } 5605 5606 bool done; 5607 5608 // send continuation fragments first, as they block the prepared packet buffer 5609 done = hci_run_acl_fragments(); 5610 if (done) return; 5611 5612 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5613 // send host num completed packets next as they don't require num_cmd_packets > 0 5614 if (!hci_can_send_comand_packet_transport()) return; 5615 if (hci_stack->host_completed_packets){ 5616 hci_host_num_completed_packets(); 5617 return; 5618 } 5619 #endif 5620 5621 if (!hci_can_send_command_packet_now()) return; 5622 5623 // global/non-connection oriented commands 5624 5625 5626 #ifdef ENABLE_CLASSIC 5627 // general gap classic 5628 done = hci_run_general_gap_classic(); 5629 if (done) return; 5630 #endif 5631 5632 #ifdef ENABLE_BLE 5633 // general gap le 5634 done = hci_run_general_gap_le(); 5635 if (done) return; 5636 #endif 5637 5638 // send pending HCI commands 5639 hci_run_general_pending_commands(); 5640 } 5641 5642 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5643 // house-keeping 5644 5645 #ifdef ENABLE_CLASSIC 5646 bd_addr_t addr; 5647 hci_connection_t * conn; 5648 #endif 5649 #ifdef ENABLE_LE_CENTRAL 5650 uint8_t initiator_filter_policy; 5651 #endif 5652 5653 uint16_t opcode = little_endian_read_16(packet, 0); 5654 switch (opcode) { 5655 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5656 hci_stack->loopback_mode = packet[3]; 5657 break; 5658 5659 #ifdef ENABLE_CLASSIC 5660 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5661 reverse_bd_addr(&packet[3], addr); 5662 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5663 5664 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5665 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5666 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5667 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5668 } 5669 5670 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5671 if (!conn) { 5672 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5673 if (!conn) { 5674 // notify client that alloc failed 5675 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5676 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5677 } 5678 conn->state = SEND_CREATE_CONNECTION; 5679 conn->role = HCI_ROLE_MASTER; 5680 } 5681 5682 conn->con_handle = HCI_CON_HANDLE_INVALID; 5683 conn->role = HCI_ROLE_INVALID; 5684 5685 log_info("conn state %u", conn->state); 5686 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5687 switch (conn->state) { 5688 // if connection active exists 5689 case OPEN: 5690 // and OPEN, emit connection complete command 5691 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5692 // packet not sent to controller 5693 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5694 case RECEIVED_DISCONNECTION_COMPLETE: 5695 // create connection triggered in disconnect complete event, let's do it now 5696 break; 5697 case SEND_CREATE_CONNECTION: 5698 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5699 break; 5700 default: 5701 // otherwise, just ignore as it is already in the open process 5702 // packet not sent to controller 5703 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5704 } 5705 conn->state = SENT_CREATE_CONNECTION; 5706 5707 // track outgoing connection 5708 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5709 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5710 break; 5711 5712 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5713 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5714 // setup_synchronous_connection? Voice setting at offset 22 5715 // TODO: compare to current setting if sco connection already active 5716 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5717 break; 5718 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5719 // accept_synchronous_connection? Voice setting at offset 18 5720 // TODO: compare to current setting if sco connection already active 5721 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5722 // track outgoing connection 5723 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5724 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5725 break; 5726 #endif 5727 #endif 5728 5729 #ifdef ENABLE_BLE 5730 #ifdef ENABLE_LE_CENTRAL 5731 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5732 // white list used? 5733 initiator_filter_policy = packet[7]; 5734 switch (initiator_filter_policy) { 5735 case 0: 5736 // whitelist not used 5737 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5738 break; 5739 case 1: 5740 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5741 break; 5742 default: 5743 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5744 break; 5745 } 5746 // track outgoing connection 5747 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5748 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5749 break; 5750 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5751 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5752 break; 5753 #endif 5754 #endif 5755 default: 5756 break; 5757 } 5758 5759 hci_stack->num_cmd_packets--; 5760 5761 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5762 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5763 if (err != 0){ 5764 return ERROR_CODE_HARDWARE_FAILURE; 5765 } 5766 return ERROR_CODE_SUCCESS; 5767 } 5768 5769 // disconnect because of security block 5770 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5771 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5772 if (!connection) return; 5773 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5774 } 5775 5776 5777 // Configure Secure Simple Pairing 5778 5779 #ifdef ENABLE_CLASSIC 5780 5781 // enable will enable SSP during init 5782 void gap_ssp_set_enable(int enable){ 5783 hci_stack->ssp_enable = enable; 5784 } 5785 5786 static int hci_local_ssp_activated(void){ 5787 return gap_ssp_supported() && hci_stack->ssp_enable; 5788 } 5789 5790 // if set, BTstack will respond to io capability request using authentication requirement 5791 void gap_ssp_set_io_capability(int io_capability){ 5792 hci_stack->ssp_io_capability = io_capability; 5793 } 5794 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5795 hci_stack->ssp_authentication_requirement = authentication_requirement; 5796 } 5797 5798 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5799 void gap_ssp_set_auto_accept(int auto_accept){ 5800 hci_stack->ssp_auto_accept = auto_accept; 5801 } 5802 5803 void gap_secure_connections_enable(bool enable){ 5804 hci_stack->secure_connections_enable = enable; 5805 } 5806 5807 #endif 5808 5809 // va_list part of hci_send_cmd 5810 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5811 if (!hci_can_send_command_packet_now()){ 5812 log_error("hci_send_cmd called but cannot send packet now"); 5813 return ERROR_CODE_COMMAND_DISALLOWED; 5814 } 5815 5816 // for HCI INITIALIZATION 5817 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5818 hci_stack->last_cmd_opcode = cmd->opcode; 5819 5820 hci_reserve_packet_buffer(); 5821 uint8_t * packet = hci_stack->hci_packet_buffer; 5822 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5823 uint8_t status = hci_send_cmd_packet(packet, size); 5824 5825 // release packet buffer on error or for synchronous transport implementations 5826 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5827 hci_release_packet_buffer(); 5828 hci_emit_transport_packet_sent(); 5829 } 5830 5831 return status; 5832 } 5833 5834 /** 5835 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5836 */ 5837 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5838 va_list argptr; 5839 va_start(argptr, cmd); 5840 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5841 va_end(argptr); 5842 return status; 5843 } 5844 5845 // Create various non-HCI events. 5846 // TODO: generalize, use table similar to hci_create_command 5847 5848 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5849 // dump packet 5850 if (dump) { 5851 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5852 } 5853 5854 // dispatch to all event handlers 5855 btstack_linked_list_iterator_t it; 5856 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5857 while (btstack_linked_list_iterator_has_next(&it)){ 5858 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5859 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5860 } 5861 } 5862 5863 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5864 if (!hci_stack->acl_packet_handler) return; 5865 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5866 } 5867 5868 #ifdef ENABLE_CLASSIC 5869 static void hci_notify_if_sco_can_send_now(void){ 5870 // notify SCO sender if waiting 5871 if (!hci_stack->sco_waiting_for_can_send_now) return; 5872 if (hci_can_send_sco_packet_now()){ 5873 hci_stack->sco_waiting_for_can_send_now = 0; 5874 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5875 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5876 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5877 } 5878 } 5879 5880 // parsing end emitting has been merged to reduce code size 5881 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5882 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5883 5884 uint8_t * eir_data; 5885 ad_context_t context; 5886 const uint8_t * name; 5887 uint8_t name_len; 5888 5889 if (size < 3) return; 5890 5891 int event_type = hci_event_packet_get_type(packet); 5892 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5893 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5894 5895 switch (event_type){ 5896 case HCI_EVENT_INQUIRY_RESULT: 5897 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5898 if (size != (3 + (num_responses * 14))) return; 5899 break; 5900 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5901 if (size != 257) return; 5902 if (num_responses != 1) return; 5903 break; 5904 default: 5905 return; 5906 } 5907 5908 // event[1] is set at the end 5909 int i; 5910 for (i=0; i<num_responses;i++){ 5911 memset(event, 0, sizeof(event)); 5912 event[0] = GAP_EVENT_INQUIRY_RESULT; 5913 uint8_t event_size = 27; // if name is not set by EIR 5914 5915 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5916 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5917 (void)memcpy(&event[9], 5918 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5919 3); // class of device 5920 (void)memcpy(&event[12], 5921 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5922 2); // clock offset 5923 5924 switch (event_type){ 5925 case HCI_EVENT_INQUIRY_RESULT: 5926 // 14,15,16,17 = 0, size 18 5927 break; 5928 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5929 event[14] = 1; 5930 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5931 // 16,17 = 0, size 18 5932 break; 5933 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5934 event[14] = 1; 5935 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5936 // EIR packets only contain a single inquiry response 5937 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5938 name = NULL; 5939 // Iterate over EIR data 5940 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5941 uint8_t data_type = ad_iterator_get_data_type(&context); 5942 uint8_t data_size = ad_iterator_get_data_len(&context); 5943 const uint8_t * data = ad_iterator_get_data(&context); 5944 // Prefer Complete Local Name over Shortened Local Name 5945 switch (data_type){ 5946 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5947 if (name) continue; 5948 /* fall through */ 5949 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5950 name = data; 5951 name_len = data_size; 5952 break; 5953 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5954 if (data_size != 8) break; 5955 event[16] = 1; 5956 memcpy(&event[17], data, 8); 5957 break; 5958 default: 5959 break; 5960 } 5961 } 5962 if (name){ 5963 event[25] = 1; 5964 // truncate name if needed 5965 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5966 event[26] = len; 5967 (void)memcpy(&event[27], name, len); 5968 event_size += len; 5969 } 5970 break; 5971 default: 5972 return; 5973 } 5974 event[1] = event_size - 2; 5975 hci_emit_event(event, event_size, 1); 5976 } 5977 } 5978 #endif 5979 5980 void hci_emit_state(void){ 5981 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5982 uint8_t event[3]; 5983 event[0] = BTSTACK_EVENT_STATE; 5984 event[1] = sizeof(event) - 2u; 5985 event[2] = hci_stack->state; 5986 hci_emit_event(event, sizeof(event), 1); 5987 } 5988 5989 #ifdef ENABLE_CLASSIC 5990 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5991 uint8_t event[13]; 5992 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5993 event[1] = sizeof(event) - 2; 5994 event[2] = status; 5995 little_endian_store_16(event, 3, con_handle); 5996 reverse_bd_addr(address, &event[5]); 5997 event[11] = 1; // ACL connection 5998 event[12] = 0; // encryption disabled 5999 hci_emit_event(event, sizeof(event), 1); 6000 } 6001 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6002 if (disable_l2cap_timeouts) return; 6003 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6004 uint8_t event[4]; 6005 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6006 event[1] = sizeof(event) - 2; 6007 little_endian_store_16(event, 2, conn->con_handle); 6008 hci_emit_event(event, sizeof(event), 1); 6009 } 6010 #endif 6011 6012 #ifdef ENABLE_BLE 6013 #ifdef ENABLE_LE_CENTRAL 6014 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){ 6015 uint8_t event[21]; 6016 event[0] = HCI_EVENT_LE_META; 6017 event[1] = sizeof(event) - 2u; 6018 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6019 event[3] = status; 6020 little_endian_store_16(event, 4, con_handle); 6021 event[6] = 0; // TODO: role 6022 event[7] = address_type; 6023 reverse_bd_addr(address, &event[8]); 6024 little_endian_store_16(event, 14, 0); // interval 6025 little_endian_store_16(event, 16, 0); // latency 6026 little_endian_store_16(event, 18, 0); // supervision timeout 6027 event[20] = 0; // master clock accuracy 6028 hci_emit_event(event, sizeof(event), 1); 6029 } 6030 #endif 6031 #endif 6032 6033 static void hci_emit_transport_packet_sent(void){ 6034 // notify upper stack that it might be possible to send again 6035 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6036 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6037 } 6038 6039 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6040 uint8_t event[6]; 6041 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6042 event[1] = sizeof(event) - 2u; 6043 event[2] = 0; // status = OK 6044 little_endian_store_16(event, 3, con_handle); 6045 event[5] = reason; 6046 hci_emit_event(event, sizeof(event), 1); 6047 } 6048 6049 static void hci_emit_nr_connections_changed(void){ 6050 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6051 uint8_t event[3]; 6052 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6053 event[1] = sizeof(event) - 2u; 6054 event[2] = nr_hci_connections(); 6055 hci_emit_event(event, sizeof(event), 1); 6056 } 6057 6058 static void hci_emit_hci_open_failed(void){ 6059 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6060 uint8_t event[2]; 6061 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6062 event[1] = sizeof(event) - 2u; 6063 hci_emit_event(event, sizeof(event), 1); 6064 } 6065 6066 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6067 log_info("hci_emit_dedicated_bonding_result %u ", status); 6068 uint8_t event[9]; 6069 int pos = 0; 6070 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6071 event[pos++] = sizeof(event) - 2u; 6072 event[pos++] = status; 6073 reverse_bd_addr(address, &event[pos]); 6074 hci_emit_event(event, sizeof(event), 1); 6075 } 6076 6077 6078 #ifdef ENABLE_CLASSIC 6079 6080 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6081 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6082 uint8_t event[5]; 6083 int pos = 0; 6084 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6085 event[pos++] = sizeof(event) - 2; 6086 little_endian_store_16(event, 2, con_handle); 6087 pos += 2; 6088 event[pos++] = level; 6089 hci_emit_event(event, sizeof(event), 1); 6090 } 6091 6092 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6093 if (!connection) return LEVEL_0; 6094 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6095 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6096 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6097 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6098 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6099 // LEVEL 4 always requires 128 bit encrytion key size 6100 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6101 security_level = LEVEL_3; 6102 } 6103 return security_level; 6104 } 6105 6106 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6107 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6108 uint8_t event[3]; 6109 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6110 event[1] = sizeof(event) - 2; 6111 event[2] = enabled; 6112 hci_emit_event(event, sizeof(event), 1); 6113 } 6114 6115 // query if remote side supports eSCO 6116 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6117 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6118 if (!connection) return false; 6119 return (connection->remote_supported_features[0] & 1) != 0; 6120 } 6121 6122 static bool hci_ssp_supported(hci_connection_t * connection){ 6123 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6124 return (connection->bonding_flags & mask) == mask; 6125 } 6126 6127 // query if remote side supports SSP 6128 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6129 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6130 if (!connection) return false; 6131 return hci_ssp_supported(connection) ? 1 : 0; 6132 } 6133 6134 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6135 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6136 } 6137 6138 /** 6139 * Check if remote supported features query has completed 6140 */ 6141 bool hci_remote_features_available(hci_con_handle_t handle){ 6142 hci_connection_t * connection = hci_connection_for_handle(handle); 6143 if (!connection) return false; 6144 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6145 } 6146 6147 /** 6148 * Trigger remote supported features query 6149 */ 6150 6151 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6152 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6153 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6154 } 6155 } 6156 6157 void hci_remote_features_query(hci_con_handle_t con_handle){ 6158 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6159 if (!connection) return; 6160 hci_trigger_remote_features_for_connection(connection); 6161 hci_run(); 6162 } 6163 6164 // GAP API 6165 /** 6166 * @bbrief enable/disable bonding. default is enabled 6167 * @praram enabled 6168 */ 6169 void gap_set_bondable_mode(int enable){ 6170 hci_stack->bondable = enable ? 1 : 0; 6171 } 6172 /** 6173 * @brief Get bondable mode. 6174 * @return 1 if bondable 6175 */ 6176 int gap_get_bondable_mode(void){ 6177 return hci_stack->bondable; 6178 } 6179 6180 /** 6181 * @brief map link keys to security levels 6182 */ 6183 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6184 switch (link_key_type){ 6185 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6186 return LEVEL_4; 6187 case COMBINATION_KEY: 6188 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6189 return LEVEL_3; 6190 default: 6191 return LEVEL_2; 6192 } 6193 } 6194 6195 /** 6196 * @brief map link keys to secure connection yes/no 6197 */ 6198 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6199 switch (link_key_type){ 6200 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6201 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6202 return true; 6203 default: 6204 return false; 6205 } 6206 } 6207 6208 /** 6209 * @brief map link keys to authenticated 6210 */ 6211 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6212 switch (link_key_type){ 6213 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6214 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6215 return true; 6216 default: 6217 return false; 6218 } 6219 } 6220 6221 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6222 log_info("gap_mitm_protection_required_for_security_level %u", level); 6223 return level > LEVEL_2; 6224 } 6225 6226 /** 6227 * @brief get current security level 6228 */ 6229 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6230 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6231 if (!connection) return LEVEL_0; 6232 return gap_security_level_for_connection(connection); 6233 } 6234 6235 /** 6236 * @brief request connection to device to 6237 * @result GAP_AUTHENTICATION_RESULT 6238 */ 6239 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6240 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6241 if (!connection){ 6242 hci_emit_security_level(con_handle, LEVEL_0); 6243 return; 6244 } 6245 6246 btstack_assert(hci_is_le_connection(connection) == false); 6247 6248 // 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) 6249 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6250 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6251 requested_level = LEVEL_4; 6252 } 6253 6254 gap_security_level_t current_level = gap_security_level(con_handle); 6255 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6256 requested_level, connection->requested_security_level, current_level); 6257 6258 // authentication active if authentication request was sent or planned level > 0 6259 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6260 if (authentication_active){ 6261 // authentication already active 6262 if (connection->requested_security_level < requested_level){ 6263 // increase requested level as new level is higher 6264 // TODO: handle re-authentication when done 6265 connection->requested_security_level = requested_level; 6266 } 6267 } else { 6268 // no request active, notify if security sufficient 6269 if (requested_level <= current_level){ 6270 hci_emit_security_level(con_handle, current_level); 6271 return; 6272 } 6273 6274 // store request 6275 connection->requested_security_level = requested_level; 6276 6277 // request remote features if not already active 6278 hci_remote_features_query(con_handle); 6279 6280 // start to authenticate connection 6281 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6282 hci_run(); 6283 } 6284 } 6285 6286 /** 6287 * @brief start dedicated bonding with device. disconnect after bonding 6288 * @param device 6289 * @param request MITM protection 6290 * @result GAP_DEDICATED_BONDING_COMPLETE 6291 */ 6292 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6293 6294 // create connection state machine 6295 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6296 6297 if (!connection){ 6298 return BTSTACK_MEMORY_ALLOC_FAILED; 6299 } 6300 6301 // delete linkn key 6302 gap_drop_link_key_for_bd_addr(device); 6303 6304 // configure LEVEL_2/3, dedicated bonding 6305 connection->state = SEND_CREATE_CONNECTION; 6306 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6307 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6308 connection->bonding_flags = BONDING_DEDICATED; 6309 6310 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6311 6312 // handle: connnection failure (connection complete != ok) 6313 // handle: authentication failure 6314 // handle: disconnect on done 6315 6316 hci_run(); 6317 6318 return 0; 6319 } 6320 6321 void gap_set_local_name(const char * local_name){ 6322 hci_stack->local_name = local_name; 6323 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6324 // also update EIR if not set by user 6325 if (hci_stack->eir_data == NULL){ 6326 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6327 } 6328 hci_run(); 6329 } 6330 #endif 6331 6332 6333 #ifdef ENABLE_BLE 6334 6335 #ifdef ENABLE_LE_CENTRAL 6336 void gap_start_scan(void){ 6337 hci_stack->le_scanning_enabled = true; 6338 hci_run(); 6339 } 6340 6341 void gap_stop_scan(void){ 6342 hci_stack->le_scanning_enabled = false; 6343 hci_run(); 6344 } 6345 6346 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6347 hci_stack->le_scan_type = scan_type; 6348 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6349 hci_stack->le_scan_interval = scan_interval; 6350 hci_stack->le_scan_window = scan_window; 6351 hci_stack->le_scanning_param_update = true; 6352 hci_run(); 6353 } 6354 6355 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6356 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6357 } 6358 6359 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6360 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6361 if (!conn){ 6362 // disallow if le connection is already outgoing 6363 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6364 log_error("le connection already active"); 6365 return ERROR_CODE_COMMAND_DISALLOWED; 6366 } 6367 6368 log_info("gap_connect: no connection exists yet, creating context"); 6369 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6370 if (!conn){ 6371 // notify client that alloc failed 6372 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6373 log_info("gap_connect: failed to alloc hci_connection_t"); 6374 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6375 } 6376 6377 // set le connecting state 6378 if (hci_is_le_connection_type(addr_type)){ 6379 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6380 } 6381 6382 conn->state = SEND_CREATE_CONNECTION; 6383 log_info("gap_connect: send create connection next"); 6384 hci_run(); 6385 return ERROR_CODE_SUCCESS; 6386 } 6387 6388 if (!hci_is_le_connection(conn) || 6389 (conn->state == SEND_CREATE_CONNECTION) || 6390 (conn->state == SENT_CREATE_CONNECTION)) { 6391 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6392 log_error("gap_connect: classic connection or connect is already being created"); 6393 return GATT_CLIENT_IN_WRONG_STATE; 6394 } 6395 6396 // check if connection was just disconnected 6397 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6398 log_info("gap_connect: send create connection (again)"); 6399 conn->state = SEND_CREATE_CONNECTION; 6400 hci_run(); 6401 return ERROR_CODE_SUCCESS; 6402 } 6403 6404 log_info("gap_connect: context exists with state %u", conn->state); 6405 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6406 hci_run(); 6407 return ERROR_CODE_SUCCESS; 6408 } 6409 6410 // @assumption: only a single outgoing LE Connection exists 6411 static hci_connection_t * gap_get_outgoing_connection(void){ 6412 btstack_linked_item_t *it; 6413 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6414 hci_connection_t * conn = (hci_connection_t *) it; 6415 if (!hci_is_le_connection(conn)) continue; 6416 switch (conn->state){ 6417 case SEND_CREATE_CONNECTION: 6418 case SENT_CREATE_CONNECTION: 6419 case SENT_CANCEL_CONNECTION: 6420 return conn; 6421 default: 6422 break; 6423 }; 6424 } 6425 return NULL; 6426 } 6427 6428 uint8_t gap_connect_cancel(void){ 6429 hci_connection_t * conn = gap_get_outgoing_connection(); 6430 if (!conn) return 0; 6431 switch (conn->state){ 6432 case SEND_CREATE_CONNECTION: 6433 // skip sending create connection and emit event instead 6434 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6435 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6436 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6437 btstack_memory_hci_connection_free( conn ); 6438 break; 6439 case SENT_CREATE_CONNECTION: 6440 // request to send cancel connection 6441 conn->state = SEND_CANCEL_CONNECTION; 6442 hci_run(); 6443 break; 6444 default: 6445 break; 6446 } 6447 return 0; 6448 } 6449 6450 /** 6451 * @brief Set connection parameters for outgoing connections 6452 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6453 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6454 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6455 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6456 * @param conn_latency, default: 4 6457 * @param supervision_timeout (unit: 10ms), default: 720 ms 6458 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6459 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6460 */ 6461 6462 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6463 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6464 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6465 hci_stack->le_connection_scan_interval = conn_scan_interval; 6466 hci_stack->le_connection_scan_window = conn_scan_window; 6467 hci_stack->le_connection_interval_min = conn_interval_min; 6468 hci_stack->le_connection_interval_max = conn_interval_max; 6469 hci_stack->le_connection_latency = conn_latency; 6470 hci_stack->le_supervision_timeout = supervision_timeout; 6471 hci_stack->le_minimum_ce_length = min_ce_length; 6472 hci_stack->le_maximum_ce_length = max_ce_length; 6473 } 6474 #endif 6475 6476 /** 6477 * @brief Updates the connection parameters for a given LE connection 6478 * @param handle 6479 * @param conn_interval_min (unit: 1.25ms) 6480 * @param conn_interval_max (unit: 1.25ms) 6481 * @param conn_latency 6482 * @param supervision_timeout (unit: 10ms) 6483 * @return 0 if ok 6484 */ 6485 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6486 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6487 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6488 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6489 connection->le_conn_interval_min = conn_interval_min; 6490 connection->le_conn_interval_max = conn_interval_max; 6491 connection->le_conn_latency = conn_latency; 6492 connection->le_supervision_timeout = supervision_timeout; 6493 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6494 hci_run(); 6495 return 0; 6496 } 6497 6498 /** 6499 * @brief Request an update of the connection parameter for a given LE connection 6500 * @param handle 6501 * @param conn_interval_min (unit: 1.25ms) 6502 * @param conn_interval_max (unit: 1.25ms) 6503 * @param conn_latency 6504 * @param supervision_timeout (unit: 10ms) 6505 * @return 0 if ok 6506 */ 6507 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6508 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6509 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6510 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6511 connection->le_conn_interval_min = conn_interval_min; 6512 connection->le_conn_interval_max = conn_interval_max; 6513 connection->le_conn_latency = conn_latency; 6514 connection->le_supervision_timeout = supervision_timeout; 6515 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6516 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6517 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6518 return 0; 6519 } 6520 6521 #ifdef ENABLE_LE_PERIPHERAL 6522 6523 /** 6524 * @brief Set Advertisement Data 6525 * @param advertising_data_length 6526 * @param advertising_data (max 31 octets) 6527 * @note data is not copied, pointer has to stay valid 6528 */ 6529 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6530 hci_stack->le_advertisements_data_len = advertising_data_length; 6531 hci_stack->le_advertisements_data = advertising_data; 6532 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6533 hci_run(); 6534 } 6535 6536 /** 6537 * @brief Set Scan Response Data 6538 * @param advertising_data_length 6539 * @param advertising_data (max 31 octets) 6540 * @note data is not copied, pointer has to stay valid 6541 */ 6542 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6543 hci_stack->le_scan_response_data_len = scan_response_data_length; 6544 hci_stack->le_scan_response_data = scan_response_data; 6545 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6546 hci_run(); 6547 } 6548 6549 /** 6550 * @brief Set Advertisement Parameters 6551 * @param adv_int_min 6552 * @param adv_int_max 6553 * @param adv_type 6554 * @param direct_address_type 6555 * @param direct_address 6556 * @param channel_map 6557 * @param filter_policy 6558 * 6559 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6560 */ 6561 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6562 uint8_t direct_address_typ, bd_addr_t direct_address, 6563 uint8_t channel_map, uint8_t filter_policy) { 6564 6565 hci_stack->le_advertisements_interval_min = adv_int_min; 6566 hci_stack->le_advertisements_interval_max = adv_int_max; 6567 hci_stack->le_advertisements_type = adv_type; 6568 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6569 hci_stack->le_advertisements_channel_map = channel_map; 6570 hci_stack->le_advertisements_filter_policy = filter_policy; 6571 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6572 6); 6573 6574 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6575 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6576 hci_run(); 6577 } 6578 6579 /** 6580 * @brief Enable/Disable Advertisements 6581 * @param enabled 6582 */ 6583 void gap_advertisements_enable(int enabled){ 6584 if (enabled == 0){ 6585 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6586 } else { 6587 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6588 } 6589 hci_update_advertisements_enabled_for_current_roles(); 6590 hci_run(); 6591 } 6592 6593 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6594 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6595 btstack_linked_list_iterator_t it; 6596 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6597 while (btstack_linked_list_iterator_has_next(&it)){ 6598 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6599 if ( item->advertising_handle == advertising_handle ) { 6600 return item; 6601 } 6602 } 6603 return NULL; 6604 } 6605 6606 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6607 // find free advertisement handle 6608 uint8_t advertisement_handle; 6609 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6610 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6611 } 6612 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6613 // clear 6614 memset(storage, 0, sizeof(le_advertising_set_t)); 6615 // copy params 6616 memcpy(&storage->params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6617 // add to list 6618 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6619 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6620 // set tasks and start 6621 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6622 hci_run(); 6623 return ERROR_CODE_SUCCESS; 6624 } 6625 6626 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6627 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6628 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6629 memcpy(&advertising_set->params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6630 // set tasks and start 6631 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6632 hci_run(); 6633 return ERROR_CODE_SUCCESS; 6634 } 6635 6636 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6637 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6638 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6639 memcpy(advertising_parameters, &advertising_set->params, sizeof(le_extended_advertising_parameters_t)); 6640 return ERROR_CODE_SUCCESS; 6641 } 6642 6643 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6644 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6645 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6646 memcpy(advertising_set->random_address, random_address, 6); 6647 // set tasks and start 6648 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6649 hci_run(); 6650 return ERROR_CODE_SUCCESS; 6651 } 6652 6653 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, uint8_t * advertising_data){ 6654 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6655 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6656 advertising_set->adv_data = advertising_data; 6657 advertising_set->adv_data_len = advertising_data_length; 6658 // set tasks and start 6659 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6660 hci_run(); 6661 return ERROR_CODE_SUCCESS; 6662 } 6663 6664 uint8_t gap_extended_advertising_set_scan_response_data(uint8_t advertising_handle, uint16_t scan_response_data_length, uint8_t * scan_response_data){ 6665 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6666 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6667 advertising_set->scan_data = scan_response_data; 6668 advertising_set->scan_data_len = scan_response_data_length; 6669 // set tasks and start 6670 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6671 hci_run(); 6672 return ERROR_CODE_SUCCESS; 6673 } 6674 6675 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6676 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6677 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6678 advertising_set->enable_timeout = timeout; 6679 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6680 // set tasks and start 6681 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6682 hci_run(); 6683 return ERROR_CODE_SUCCESS; 6684 } 6685 6686 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6687 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6688 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6689 // set tasks and start 6690 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6691 hci_run(); 6692 return ERROR_CODE_SUCCESS; 6693 } 6694 6695 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 6696 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6697 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6698 // set tasks and start 6699 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 6700 hci_run(); 6701 return ERROR_CODE_SUCCESS; 6702 } 6703 #endif 6704 6705 #endif 6706 6707 void hci_le_set_own_address_type(uint8_t own_address_type){ 6708 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6709 if (own_address_type == hci_stack->le_own_addr_type) return; 6710 hci_stack->le_own_addr_type = own_address_type; 6711 6712 #ifdef ENABLE_LE_PERIPHERAL 6713 // update advertisement parameters, too 6714 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6715 hci_run(); 6716 #endif 6717 #ifdef ENABLE_LE_CENTRAL 6718 // note: we don't update scan parameters or modify ongoing connection attempts 6719 #endif 6720 } 6721 6722 void hci_le_random_address_set(const bd_addr_t random_address){ 6723 memcpy(hci_stack->le_random_address, random_address, 6); 6724 hci_stack->le_random_address_set = true; 6725 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6726 hci_run(); 6727 } 6728 6729 #endif 6730 6731 uint8_t gap_disconnect(hci_con_handle_t handle){ 6732 hci_connection_t * conn = hci_connection_for_handle(handle); 6733 if (!conn){ 6734 hci_emit_disconnection_complete(handle, 0); 6735 return 0; 6736 } 6737 // ignore if already disconnected 6738 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6739 return 0; 6740 } 6741 conn->state = SEND_DISCONNECT; 6742 hci_run(); 6743 return 0; 6744 } 6745 6746 int gap_read_rssi(hci_con_handle_t con_handle){ 6747 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6748 if (hci_connection == NULL) return 0; 6749 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6750 hci_run(); 6751 return 1; 6752 } 6753 6754 /** 6755 * @brief Get connection type 6756 * @param con_handle 6757 * @result connection_type 6758 */ 6759 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6760 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6761 if (!conn) return GAP_CONNECTION_INVALID; 6762 switch (conn->address_type){ 6763 case BD_ADDR_TYPE_LE_PUBLIC: 6764 case BD_ADDR_TYPE_LE_RANDOM: 6765 return GAP_CONNECTION_LE; 6766 case BD_ADDR_TYPE_SCO: 6767 return GAP_CONNECTION_SCO; 6768 case BD_ADDR_TYPE_ACL: 6769 return GAP_CONNECTION_ACL; 6770 default: 6771 return GAP_CONNECTION_INVALID; 6772 } 6773 } 6774 6775 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6776 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6777 if (!conn) return HCI_ROLE_INVALID; 6778 return (hci_role_t) conn->role; 6779 } 6780 6781 6782 #ifdef ENABLE_CLASSIC 6783 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6784 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6785 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6786 conn->request_role = role; 6787 hci_run(); 6788 return ERROR_CODE_SUCCESS; 6789 } 6790 #endif 6791 6792 #ifdef ENABLE_BLE 6793 6794 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){ 6795 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6796 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6797 6798 conn->le_phy_update_all_phys = all_phys; 6799 conn->le_phy_update_tx_phys = tx_phys; 6800 conn->le_phy_update_rx_phys = rx_phys; 6801 conn->le_phy_update_phy_options = phy_options; 6802 6803 hci_run(); 6804 6805 return 0; 6806 } 6807 6808 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6809 // check if already in list 6810 btstack_linked_list_iterator_t it; 6811 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6812 while (btstack_linked_list_iterator_has_next(&it)) { 6813 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6814 if (entry->address_type != address_type) { 6815 continue; 6816 } 6817 if (memcmp(entry->address, address, 6) != 0) { 6818 continue; 6819 } 6820 // disallow if already scheduled to add 6821 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6822 return ERROR_CODE_COMMAND_DISALLOWED; 6823 } 6824 // still on controller, but scheduled to remove -> re-add 6825 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6826 return ERROR_CODE_SUCCESS; 6827 } 6828 // alloc and add to list 6829 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6830 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6831 entry->address_type = address_type; 6832 (void)memcpy(entry->address, address, 6); 6833 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6834 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6835 return ERROR_CODE_SUCCESS; 6836 } 6837 6838 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6839 btstack_linked_list_iterator_t it; 6840 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6841 while (btstack_linked_list_iterator_has_next(&it)){ 6842 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6843 if (entry->address_type != address_type) { 6844 continue; 6845 } 6846 if (memcmp(entry->address, address, 6) != 0) { 6847 continue; 6848 } 6849 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6850 // remove from controller if already present 6851 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6852 } else { 6853 // directly remove entry from whitelist 6854 btstack_linked_list_iterator_remove(&it); 6855 btstack_memory_whitelist_entry_free(entry); 6856 } 6857 return ERROR_CODE_SUCCESS; 6858 } 6859 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6860 } 6861 6862 static void hci_whitelist_clear(void){ 6863 btstack_linked_list_iterator_t it; 6864 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6865 while (btstack_linked_list_iterator_has_next(&it)){ 6866 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6867 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6868 // remove from controller if already present 6869 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6870 continue; 6871 } 6872 // directly remove entry from whitelist 6873 btstack_linked_list_iterator_remove(&it); 6874 btstack_memory_whitelist_entry_free(entry); 6875 } 6876 } 6877 6878 // free all entries unconditionally 6879 static void hci_whitelist_free(void){ 6880 btstack_linked_list_iterator_t lit; 6881 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6882 while (btstack_linked_list_iterator_has_next(&lit)){ 6883 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6884 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6885 btstack_memory_whitelist_entry_free(entry); 6886 } 6887 } 6888 6889 /** 6890 * @brief Clear Whitelist 6891 * @return 0 if ok 6892 */ 6893 uint8_t gap_whitelist_clear(void){ 6894 hci_whitelist_clear(); 6895 hci_run(); 6896 return ERROR_CODE_SUCCESS; 6897 } 6898 6899 /** 6900 * @brief Add Device to Whitelist 6901 * @param address_typ 6902 * @param address 6903 * @return 0 if ok 6904 */ 6905 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6906 uint8_t status = hci_whitelist_add(address_type, address); 6907 if (status){ 6908 return status; 6909 } 6910 hci_run(); 6911 return ERROR_CODE_SUCCESS; 6912 } 6913 6914 /** 6915 * @brief Remove Device from Whitelist 6916 * @param address_typ 6917 * @param address 6918 * @return 0 if ok 6919 */ 6920 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6921 uint8_t status = hci_whitelist_remove(address_type, address); 6922 if (status){ 6923 return status; 6924 } 6925 hci_run(); 6926 return ERROR_CODE_SUCCESS; 6927 } 6928 6929 #ifdef ENABLE_LE_CENTRAL 6930 /** 6931 * @brief Connect with Whitelist 6932 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6933 * @return - if ok 6934 */ 6935 uint8_t gap_connect_with_whitelist(void){ 6936 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6937 return ERROR_CODE_COMMAND_DISALLOWED; 6938 } 6939 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6940 hci_run(); 6941 return ERROR_CODE_SUCCESS; 6942 } 6943 6944 /** 6945 * @brief Auto Connection Establishment - Start Connecting to device 6946 * @param address_typ 6947 * @param address 6948 * @return 0 if ok 6949 */ 6950 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6951 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6952 return ERROR_CODE_COMMAND_DISALLOWED; 6953 } 6954 6955 uint8_t status = hci_whitelist_add(address_type, address); 6956 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6957 return status; 6958 } 6959 6960 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6961 6962 hci_run(); 6963 return ERROR_CODE_SUCCESS; 6964 } 6965 6966 /** 6967 * @brief Auto Connection Establishment - Stop Connecting to device 6968 * @param address_typ 6969 * @param address 6970 * @return 0 if ok 6971 */ 6972 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6973 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6974 return ERROR_CODE_COMMAND_DISALLOWED; 6975 } 6976 6977 hci_whitelist_remove(address_type, address); 6978 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6979 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6980 } 6981 hci_run(); 6982 return 0; 6983 } 6984 6985 /** 6986 * @brief Auto Connection Establishment - Stop everything 6987 * @note Convenience function to stop all active auto connection attempts 6988 */ 6989 uint8_t gap_auto_connection_stop_all(void){ 6990 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6991 return ERROR_CODE_COMMAND_DISALLOWED; 6992 } 6993 hci_whitelist_clear(); 6994 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6995 hci_run(); 6996 return ERROR_CODE_SUCCESS; 6997 } 6998 6999 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7000 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7001 if (!conn) return 0; 7002 return conn->le_connection_interval; 7003 } 7004 #endif 7005 #endif 7006 7007 #ifdef ENABLE_CLASSIC 7008 /** 7009 * @brief Set Extended Inquiry Response data 7010 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7011 * @note has to be done before stack starts up 7012 */ 7013 void gap_set_extended_inquiry_response(const uint8_t * data){ 7014 hci_stack->eir_data = data; 7015 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7016 hci_run(); 7017 } 7018 7019 /** 7020 * @brief Start GAP Classic Inquiry 7021 * @param duration in 1.28s units 7022 * @return 0 if ok 7023 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7024 */ 7025 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7026 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7027 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7028 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7029 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7030 } 7031 hci_stack->inquiry_state = duration_in_1280ms_units; 7032 hci_run(); 7033 return 0; 7034 } 7035 7036 /** 7037 * @brief Stop GAP Classic Inquiry 7038 * @return 0 if ok 7039 */ 7040 int gap_inquiry_stop(void){ 7041 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7042 // emit inquiry complete event, before it even started 7043 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7044 hci_emit_event(event, sizeof(event), 1); 7045 return 0; 7046 } 7047 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7048 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7049 hci_run(); 7050 return 0; 7051 } 7052 7053 void gap_inquiry_set_lap(uint32_t lap){ 7054 hci_stack->inquiry_lap = lap; 7055 } 7056 7057 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7058 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7059 hci_stack->inquiry_scan_window = inquiry_scan_window; 7060 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7061 hci_run(); 7062 } 7063 7064 7065 /** 7066 * @brief Remote Name Request 7067 * @param addr 7068 * @param page_scan_repetition_mode 7069 * @param clock_offset only used when bit 15 is set 7070 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7071 */ 7072 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7073 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7074 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7075 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7076 hci_stack->remote_name_clock_offset = clock_offset; 7077 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7078 hci_run(); 7079 return 0; 7080 } 7081 7082 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7083 hci_stack->gap_pairing_state = state; 7084 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7085 hci_run(); 7086 return 0; 7087 } 7088 7089 /** 7090 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7091 * @param addr 7092 * @param pin_data 7093 * @param pin_len 7094 * @return 0 if ok 7095 */ 7096 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7097 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7098 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7099 hci_stack->gap_pairing_pin_len = pin_len; 7100 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7101 } 7102 7103 /** 7104 * @brief Legacy Pairing Pin Code Response 7105 * @param addr 7106 * @param pin 7107 * @return 0 if ok 7108 */ 7109 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7110 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7111 } 7112 7113 /** 7114 * @brief Abort Legacy Pairing 7115 * @param addr 7116 * @param pin 7117 * @return 0 if ok 7118 */ 7119 int gap_pin_code_negative(bd_addr_t addr){ 7120 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7121 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7122 } 7123 7124 /** 7125 * @brief SSP Passkey Response 7126 * @param addr 7127 * @param passkey 7128 * @return 0 if ok 7129 */ 7130 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7131 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7132 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7133 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7134 } 7135 7136 /** 7137 * @brief Abort SSP Passkey Entry/Pairing 7138 * @param addr 7139 * @param pin 7140 * @return 0 if ok 7141 */ 7142 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7143 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7144 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7145 } 7146 7147 /** 7148 * @brief Accept SSP Numeric Comparison 7149 * @param addr 7150 * @param passkey 7151 * @return 0 if ok 7152 */ 7153 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7154 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7155 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7156 } 7157 7158 /** 7159 * @brief Abort SSP Numeric Comparison/Pairing 7160 * @param addr 7161 * @param pin 7162 * @return 0 if ok 7163 */ 7164 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7165 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7166 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7167 } 7168 7169 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7170 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7171 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7172 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7173 connectionSetAuthenticationFlags(conn, flag); 7174 hci_run(); 7175 return ERROR_CODE_SUCCESS; 7176 } 7177 #endif 7178 7179 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7180 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7181 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7182 } 7183 7184 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7185 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7186 } 7187 #endif 7188 7189 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7190 /** 7191 * @brief Report Remote OOB Data 7192 * @param bd_addr 7193 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7194 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7195 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7196 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7197 */ 7198 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){ 7199 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7200 if (connection == NULL) { 7201 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7202 } 7203 connection->classic_oob_c_192 = c_192; 7204 connection->classic_oob_r_192 = r_192; 7205 7206 // ignore P-256 if not supported by us 7207 if (hci_stack->secure_connections_active){ 7208 connection->classic_oob_c_256 = c_256; 7209 connection->classic_oob_r_256 = r_256; 7210 } 7211 7212 return ERROR_CODE_SUCCESS; 7213 } 7214 /** 7215 * @brief Generate new OOB data 7216 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7217 */ 7218 void gap_ssp_generate_oob_data(void){ 7219 hci_stack->classic_read_local_oob_data = true; 7220 hci_run(); 7221 } 7222 7223 #endif 7224 7225 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7226 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7227 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7228 if (connection == NULL) { 7229 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7230 } 7231 7232 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7233 connection->link_key_type = type; 7234 7235 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7236 } 7237 7238 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7239 /** 7240 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7241 * @param inquiry_mode see bluetooth_defines.h 7242 */ 7243 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7244 hci_stack->inquiry_mode = inquiry_mode; 7245 } 7246 7247 /** 7248 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7249 */ 7250 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7251 hci_stack->sco_voice_setting = voice_setting; 7252 } 7253 7254 /** 7255 * @brief Get SCO Voice Setting 7256 * @return current voice setting 7257 */ 7258 uint16_t hci_get_sco_voice_setting(void){ 7259 return hci_stack->sco_voice_setting; 7260 } 7261 7262 static int hci_have_usb_transport(void){ 7263 if (!hci_stack->hci_transport) return 0; 7264 const char * transport_name = hci_stack->hci_transport->name; 7265 if (!transport_name) return 0; 7266 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7267 } 7268 7269 /** @brief Get SCO packet length for current SCO Voice setting 7270 * @note Using SCO packets of the exact length is required for USB transfer 7271 * @return Length of SCO packets in bytes (not audio frames) 7272 */ 7273 uint16_t hci_get_sco_packet_length(void){ 7274 uint16_t sco_packet_length = 0; 7275 7276 #ifdef ENABLE_SCO_OVER_HCI 7277 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7278 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7279 7280 if (hci_have_usb_transport()){ 7281 // see Core Spec for H2 USB Transfer. 7282 // 3 byte SCO header + 24 bytes per connection 7283 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7284 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7285 } else { 7286 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7287 sco_packet_length = 3 + 60 * multiplier; 7288 // assert that it still fits inside an SCO buffer 7289 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7290 sco_packet_length = 3 + 60; 7291 } 7292 } 7293 #endif 7294 7295 #ifdef HAVE_SCO_TRANSPORT 7296 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7297 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7298 sco_packet_length = 3 + 60 * multiplier; 7299 #endif 7300 return sco_packet_length; 7301 } 7302 7303 /** 7304 * @brief Sets the master/slave policy 7305 * @param policy (0: attempt to become master, 1: let connecting device decide) 7306 */ 7307 void hci_set_master_slave_policy(uint8_t policy){ 7308 hci_stack->master_slave_policy = policy; 7309 } 7310 7311 #endif 7312 7313 HCI_STATE hci_get_state(void){ 7314 return hci_stack->state; 7315 } 7316 7317 #ifdef ENABLE_CLASSIC 7318 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7319 hci_stack->gap_classic_accept_callback = accept_callback; 7320 } 7321 #endif 7322 7323 /** 7324 * @brief Set callback for Bluetooth Hardware Error 7325 */ 7326 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7327 hci_stack->hardware_error_callback = fn; 7328 } 7329 7330 void hci_disconnect_all(void){ 7331 btstack_linked_list_iterator_t it; 7332 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7333 while (btstack_linked_list_iterator_has_next(&it)){ 7334 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7335 if (con->state == SENT_DISCONNECT) continue; 7336 con->state = SEND_DISCONNECT; 7337 } 7338 hci_run(); 7339 } 7340 7341 uint16_t hci_get_manufacturer(void){ 7342 return hci_stack->manufacturer; 7343 } 7344 7345 #ifdef ENABLE_BLE 7346 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7347 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7348 if (!hci_con) return NULL; 7349 return &hci_con->sm_connection; 7350 } 7351 7352 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7353 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7354 #endif 7355 7356 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7357 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7358 if (hci_connection == NULL) return 0; 7359 if (hci_is_le_connection(hci_connection)){ 7360 #ifdef ENABLE_BLE 7361 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7362 if (sm_conn->sm_connection_encrypted) { 7363 return sm_conn->sm_actual_encryption_key_size; 7364 } 7365 #endif 7366 } else { 7367 #ifdef ENABLE_CLASSIC 7368 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7369 return hci_connection->encryption_key_size; 7370 } 7371 #endif 7372 } 7373 return 0; 7374 } 7375 7376 bool gap_authenticated(hci_con_handle_t con_handle){ 7377 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7378 if (hci_connection == NULL) return false; 7379 7380 switch (hci_connection->address_type){ 7381 #ifdef ENABLE_BLE 7382 case BD_ADDR_TYPE_LE_PUBLIC: 7383 case BD_ADDR_TYPE_LE_RANDOM: 7384 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7385 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7386 #endif 7387 #ifdef ENABLE_CLASSIC 7388 case BD_ADDR_TYPE_SCO: 7389 case BD_ADDR_TYPE_ACL: 7390 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7391 #endif 7392 default: 7393 return false; 7394 } 7395 } 7396 7397 bool gap_secure_connection(hci_con_handle_t con_handle){ 7398 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7399 if (hci_connection == NULL) return 0; 7400 7401 switch (hci_connection->address_type){ 7402 #ifdef ENABLE_BLE 7403 case BD_ADDR_TYPE_LE_PUBLIC: 7404 case BD_ADDR_TYPE_LE_RANDOM: 7405 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7406 return hci_connection->sm_connection.sm_connection_sc != 0; 7407 #endif 7408 #ifdef ENABLE_CLASSIC 7409 case BD_ADDR_TYPE_SCO: 7410 case BD_ADDR_TYPE_ACL: 7411 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7412 #endif 7413 default: 7414 return false; 7415 } 7416 } 7417 7418 bool gap_bonded(hci_con_handle_t con_handle){ 7419 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7420 if (hci_connection == NULL) return 0; 7421 7422 #ifdef ENABLE_CLASSIC 7423 link_key_t link_key; 7424 link_key_type_t link_key_type; 7425 #endif 7426 switch (hci_connection->address_type){ 7427 #ifdef ENABLE_BLE 7428 case BD_ADDR_TYPE_LE_PUBLIC: 7429 case BD_ADDR_TYPE_LE_RANDOM: 7430 return hci_connection->sm_connection.sm_le_db_index >= 0; 7431 #endif 7432 #ifdef ENABLE_CLASSIC 7433 case BD_ADDR_TYPE_SCO: 7434 case BD_ADDR_TYPE_ACL: 7435 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7436 #endif 7437 default: 7438 return false; 7439 } 7440 } 7441 7442 #ifdef ENABLE_BLE 7443 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7444 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7445 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7446 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7447 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7448 return sm_conn->sm_connection_authorization_state; 7449 } 7450 #endif 7451 7452 #ifdef ENABLE_CLASSIC 7453 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){ 7454 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7455 if (!conn) return GAP_CONNECTION_INVALID; 7456 conn->sniff_min_interval = sniff_min_interval; 7457 conn->sniff_max_interval = sniff_max_interval; 7458 conn->sniff_attempt = sniff_attempt; 7459 conn->sniff_timeout = sniff_timeout; 7460 hci_run(); 7461 return 0; 7462 } 7463 7464 /** 7465 * @brief Exit Sniff mode 7466 * @param con_handle 7467 @ @return 0 if ok 7468 */ 7469 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7470 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7471 if (!conn) return GAP_CONNECTION_INVALID; 7472 conn->sniff_min_interval = 0xffff; 7473 hci_run(); 7474 return 0; 7475 } 7476 7477 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){ 7478 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7479 if (!conn) return GAP_CONNECTION_INVALID; 7480 conn->sniff_subrating_max_latency = max_latency; 7481 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7482 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7483 hci_run(); 7484 return ERROR_CODE_SUCCESS; 7485 } 7486 7487 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){ 7488 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7489 if (!conn) return GAP_CONNECTION_INVALID; 7490 conn->qos_service_type = service_type; 7491 conn->qos_token_rate = token_rate; 7492 conn->qos_peak_bandwidth = peak_bandwidth; 7493 conn->qos_latency = latency; 7494 conn->qos_delay_variation = delay_variation; 7495 hci_run(); 7496 return ERROR_CODE_SUCCESS; 7497 } 7498 7499 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7500 hci_stack->new_page_scan_interval = page_scan_interval; 7501 hci_stack->new_page_scan_window = page_scan_window; 7502 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7503 hci_run(); 7504 } 7505 7506 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7507 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7508 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7509 hci_run(); 7510 } 7511 7512 void gap_set_page_timeout(uint16_t page_timeout){ 7513 hci_stack->page_timeout = page_timeout; 7514 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7515 hci_run(); 7516 } 7517 7518 #endif 7519 7520 void hci_halting_defer(void){ 7521 if (hci_stack->state != HCI_STATE_HALTING) return; 7522 switch (hci_stack->substate){ 7523 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 7524 case HCI_HALTING_CLOSE: 7525 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 7526 break; 7527 default: 7528 break; 7529 } 7530 } 7531 7532 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7533 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7534 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7535 if (le_device_db_index >= le_device_db_max_count()) return; 7536 uint8_t offset = le_device_db_index >> 3; 7537 uint8_t mask = 1 << (le_device_db_index & 7); 7538 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7539 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7540 // note: go back to remove entries, otherwise, a remove + add will skip the add 7541 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7542 } 7543 } 7544 7545 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7546 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7547 if (le_device_db_index >= le_device_db_max_count()) return; 7548 uint8_t offset = le_device_db_index >> 3; 7549 uint8_t mask = 1 << (le_device_db_index & 7); 7550 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7551 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7552 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7553 } 7554 } 7555 7556 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7557 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7558 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7559 } 7560 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7561 // restart le resolving list update 7562 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7563 } 7564 return ERROR_CODE_SUCCESS; 7565 } 7566 #endif 7567 7568 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7569 void hci_setup_test_connections_fuzz(void){ 7570 hci_connection_t * conn; 7571 7572 // default address: 66:55:44:33:00:01 7573 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7574 7575 // setup Controller info 7576 hci_stack->num_cmd_packets = 255; 7577 hci_stack->acl_packets_total_num = 255; 7578 7579 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7580 addr[5] = 0x01; 7581 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7582 conn->con_handle = addr[5]; 7583 conn->role = HCI_ROLE_SLAVE; 7584 conn->state = RECEIVED_CONNECTION_REQUEST; 7585 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7586 7587 // setup incoming Classic SCO connection with con handle 0x0002 7588 addr[5] = 0x02; 7589 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7590 conn->con_handle = addr[5]; 7591 conn->role = HCI_ROLE_SLAVE; 7592 conn->state = RECEIVED_CONNECTION_REQUEST; 7593 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7594 7595 // setup ready Classic ACL connection with con handle 0x0003 7596 addr[5] = 0x03; 7597 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7598 conn->con_handle = addr[5]; 7599 conn->role = HCI_ROLE_SLAVE; 7600 conn->state = OPEN; 7601 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7602 7603 // setup ready Classic SCO connection with con handle 0x0004 7604 addr[5] = 0x04; 7605 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7606 conn->con_handle = addr[5]; 7607 conn->role = HCI_ROLE_SLAVE; 7608 conn->state = OPEN; 7609 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7610 7611 // setup ready LE ACL connection with con handle 0x005 and public address 7612 addr[5] = 0x05; 7613 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7614 conn->con_handle = addr[5]; 7615 conn->role = HCI_ROLE_SLAVE; 7616 conn->state = OPEN; 7617 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7618 conn->sm_connection.sm_connection_encrypted = 1; 7619 } 7620 7621 void hci_free_connections_fuzz(void){ 7622 btstack_linked_list_iterator_t it; 7623 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7624 while (btstack_linked_list_iterator_has_next(&it)){ 7625 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7626 btstack_linked_list_iterator_remove(&it); 7627 btstack_memory_hci_connection_free(con); 7628 } 7629 } 7630 void hci_simulate_working_fuzz(void){ 7631 hci_stack->le_scanning_param_update = false; 7632 hci_init_done(); 7633 hci_stack->num_cmd_packets = 255; 7634 } 7635 #endif 7636