1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // 136 // compact storage of relevant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into the supported 138 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 139 // 140 141 // format: command name, byte offset, bit nr in 64-byte supported commands 142 #define SUPPORTED_HCI_COMMANDS \ 143 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 144 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 145 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 146 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 147 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 148 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 149 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 151 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 152 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 153 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 154 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 156 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 157 158 // enumerate supported commands 159 #define X(name, offset, bit) name, 160 enum { 161 SUPPORTED_HCI_COMMANDS 162 SUPPORTED_HCI_COMMANDS_COUNT 163 }; 164 #undef X 165 166 // assert supported hci commands bitmap fits into provided storage 167 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 168 #error "Storage for supported HCI commands too small" 169 #endif 170 171 // prototypes 172 #ifdef ENABLE_CLASSIC 173 static void hci_update_scan_enable(void); 174 static void hci_emit_discoverable_enabled(uint8_t enabled); 175 static int hci_local_ssp_activated(void); 176 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 177 static bool hci_ssp_supported(hci_connection_t * connection); 178 static void hci_notify_if_sco_can_send_now(void); 179 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 180 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 181 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 182 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 183 static void hci_connection_timestamp(hci_connection_t *connection); 184 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 185 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 186 #endif 187 188 static int hci_power_control_on(void); 189 static void hci_power_control_off(void); 190 static void hci_state_reset(void); 191 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 192 static void hci_emit_transport_packet_sent(void); 193 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 194 static void hci_emit_nr_connections_changed(void); 195 static void hci_emit_hci_open_failed(void); 196 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 197 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 198 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 199 static void hci_run(void); 200 static int hci_is_le_connection(hci_connection_t * connection); 201 202 #ifdef ENABLE_CLASSIC 203 static int hci_have_usb_transport(void); 204 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 205 #endif 206 207 #ifdef ENABLE_BLE 208 #ifdef ENABLE_LE_CENTRAL 209 // called from test/ble_client/advertising_data_parser.c 210 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 211 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 212 static void hci_whitelist_free(void); 213 static hci_connection_t * gap_get_outgoing_connection(void); 214 static bool hci_run_general_gap_le(void); 215 #endif 216 #endif 217 218 // the STACK is here 219 #ifndef HAVE_MALLOC 220 static hci_stack_t hci_stack_static; 221 #endif 222 static hci_stack_t * hci_stack = NULL; 223 224 #ifdef ENABLE_CLASSIC 225 // default name 226 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 227 228 // test helper 229 static uint8_t disable_l2cap_timeouts = 0; 230 #endif 231 232 // reset connection state on create and on reconnect 233 // don't overwrite addr, con handle, role 234 static void hci_connection_init(hci_connection_t * conn){ 235 conn->authentication_flags = AUTH_FLAG_NONE; 236 conn->bonding_flags = 0; 237 conn->requested_security_level = LEVEL_0; 238 #ifdef ENABLE_CLASSIC 239 conn->request_role = HCI_ROLE_INVALID; 240 conn->sniff_subrating_max_latency = 0xffff; 241 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 242 conn->link_key_type = INVALID_LINK_KEY; 243 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 244 btstack_run_loop_set_timer_context(&conn->timeout, conn); 245 hci_connection_timestamp(conn); 246 #endif 247 conn->acl_recombination_length = 0; 248 conn->acl_recombination_pos = 0; 249 conn->num_packets_sent = 0; 250 251 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 252 #ifdef ENABLE_BLE 253 conn->le_phy_update_all_phys = 0xff; 254 #endif 255 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 256 conn->le_max_tx_octets = 27; 257 #endif 258 #ifdef ENABLE_CLASSIC_PAIRING_OOB 259 conn->classic_oob_c_192 = NULL; 260 conn->classic_oob_r_192 = NULL; 261 conn->classic_oob_c_256 = NULL; 262 conn->classic_oob_r_256 = NULL; 263 #endif 264 } 265 266 /** 267 * create connection for given address 268 * 269 * @return connection OR NULL, if no memory left 270 */ 271 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 272 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 273 274 hci_connection_t * conn = btstack_memory_hci_connection_get(); 275 if (!conn) return NULL; 276 hci_connection_init(conn); 277 278 bd_addr_copy(conn->address, addr); 279 conn->address_type = addr_type; 280 conn->con_handle = HCI_CON_HANDLE_INVALID; 281 conn->role = HCI_ROLE_INVALID; 282 283 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 284 285 return conn; 286 } 287 288 289 /** 290 * get le connection parameter range 291 * 292 * @return le connection parameter range struct 293 */ 294 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 295 *range = hci_stack->le_connection_parameter_range; 296 } 297 298 /** 299 * set le connection parameter range 300 * 301 */ 302 303 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 304 hci_stack->le_connection_parameter_range = *range; 305 } 306 307 /** 308 * @brief Test if connection parameters are inside in existing rage 309 * @param conn_interval_min (unit: 1.25ms) 310 * @param conn_interval_max (unit: 1.25ms) 311 * @param conn_latency 312 * @param supervision_timeout (unit: 10ms) 313 * @return 1 if included 314 */ 315 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 316 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 317 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 318 319 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 320 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 321 322 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 323 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 324 325 return 1; 326 } 327 328 /** 329 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 330 * @note: default: 1 331 * @param max_peripheral_connections 332 */ 333 #ifdef ENABLE_LE_PERIPHERAL 334 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 335 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 336 } 337 #endif 338 339 /** 340 * get hci connections iterator 341 * 342 * @return hci connections iterator 343 */ 344 345 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 346 btstack_linked_list_iterator_init(it, &hci_stack->connections); 347 } 348 349 /** 350 * get connection for a given handle 351 * 352 * @return connection OR NULL, if not found 353 */ 354 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 355 btstack_linked_list_iterator_t it; 356 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 357 while (btstack_linked_list_iterator_has_next(&it)){ 358 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 359 if ( item->con_handle == con_handle ) { 360 return item; 361 } 362 } 363 return NULL; 364 } 365 366 /** 367 * get connection for given address 368 * 369 * @return connection OR NULL, if not found 370 */ 371 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 372 btstack_linked_list_iterator_t it; 373 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 374 while (btstack_linked_list_iterator_has_next(&it)){ 375 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 376 if (connection->address_type != addr_type) continue; 377 if (memcmp(addr, connection->address, 6) != 0) continue; 378 return connection; 379 } 380 return NULL; 381 } 382 383 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 384 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 385 } 386 387 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 388 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 389 } 390 391 #ifdef ENABLE_CLASSIC 392 393 #ifdef ENABLE_SCO_OVER_HCI 394 static int hci_number_sco_connections(void){ 395 int connections = 0; 396 btstack_linked_list_iterator_t it; 397 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 398 while (btstack_linked_list_iterator_has_next(&it)){ 399 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 400 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 401 connections++; 402 } 403 return connections; 404 } 405 #endif 406 407 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 408 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 409 #ifdef HAVE_EMBEDDED_TICK 410 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 411 // connections might be timed out 412 hci_emit_l2cap_check_timeout(connection); 413 } 414 #else 415 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 416 // connections might be timed out 417 hci_emit_l2cap_check_timeout(connection); 418 } 419 #endif 420 } 421 422 static void hci_connection_timestamp(hci_connection_t *connection){ 423 #ifdef HAVE_EMBEDDED_TICK 424 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 425 #else 426 connection->timestamp = btstack_run_loop_get_time_ms(); 427 #endif 428 } 429 430 /** 431 * add authentication flags and reset timer 432 * @note: assumes classic connection 433 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 434 */ 435 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 436 bd_addr_t addr; 437 reverse_bd_addr(bd_addr, addr); 438 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 439 if (conn) { 440 connectionSetAuthenticationFlags(conn, flags); 441 hci_connection_timestamp(conn); 442 } 443 } 444 445 static bool hci_pairing_active(hci_connection_t * hci_connection){ 446 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 447 } 448 449 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 450 if (hci_pairing_active(hci_connection)) return; 451 if (ssp){ 452 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 453 } else { 454 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 455 } 456 // if we are initiator, we have sent an HCI Authenticate Request 457 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 458 459 // if we are responder, use minimal service security level as required level 460 if (!initiator){ 461 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 462 } 463 464 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 465 466 uint8_t event[12]; 467 event[0] = GAP_EVENT_PAIRING_STARTED; 468 event[1] = 10; 469 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 470 reverse_bd_addr(hci_connection->address, &event[4]); 471 event[10] = (uint8_t) ssp; 472 event[11] = (uint8_t) initiator; 473 hci_emit_event(event, sizeof(event), 1); 474 } 475 476 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 477 hci_connection->requested_security_level = LEVEL_0; 478 if (!hci_pairing_active(hci_connection)) return; 479 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 480 #ifdef ENABLE_CLASSIC_PAIRING_OOB 481 hci_connection->classic_oob_c_192 = NULL; 482 hci_connection->classic_oob_r_192 = NULL; 483 hci_connection->classic_oob_c_256 = NULL; 484 hci_connection->classic_oob_r_256 = NULL; 485 #endif 486 log_info("pairing complete, status %02x", status); 487 488 uint8_t event[11]; 489 event[0] = GAP_EVENT_PAIRING_COMPLETE; 490 event[1] = 9; 491 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 492 reverse_bd_addr(hci_connection->address, &event[4]); 493 event[10] = status; 494 hci_emit_event(event, sizeof(event), 1); 495 } 496 497 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 498 hci_connection_t * conn = hci_connection_for_handle(handle); 499 if (!conn) return false; 500 return hci_pairing_active(conn); 501 } 502 503 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 504 if (!hci_stack->link_key_db) return; 505 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 506 hci_stack->link_key_db->delete_link_key(addr); 507 } 508 509 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 510 if (!hci_stack->link_key_db) return; 511 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 512 hci_stack->link_key_db->put_link_key(addr, link_key, type); 513 } 514 515 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 516 if (!hci_stack->link_key_db) return false; 517 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 518 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 519 return result; 520 } 521 522 void gap_delete_all_link_keys(void){ 523 bd_addr_t addr; 524 link_key_t link_key; 525 link_key_type_t type; 526 btstack_link_key_iterator_t it; 527 int ok = gap_link_key_iterator_init(&it); 528 if (!ok) { 529 log_error("could not initialize iterator"); 530 return; 531 } 532 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 533 gap_drop_link_key_for_bd_addr(addr); 534 } 535 gap_link_key_iterator_done(&it); 536 } 537 538 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 539 if (!hci_stack->link_key_db) return 0; 540 if (!hci_stack->link_key_db->iterator_init) return 0; 541 return hci_stack->link_key_db->iterator_init(it); 542 } 543 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 544 if (!hci_stack->link_key_db) return 0; 545 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 546 } 547 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 548 if (!hci_stack->link_key_db) return; 549 hci_stack->link_key_db->iterator_done(it); 550 } 551 #endif 552 553 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 554 switch (address_type){ 555 case BD_ADDR_TYPE_LE_PUBLIC: 556 case BD_ADDR_TYPE_LE_RANDOM: 557 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 558 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 559 return true; 560 default: 561 return false; 562 } 563 } 564 565 static int hci_is_le_connection(hci_connection_t * connection){ 566 return hci_is_le_connection_type(connection->address_type); 567 } 568 569 /** 570 * count connections 571 */ 572 static int nr_hci_connections(void){ 573 int count = 0; 574 btstack_linked_item_t *it; 575 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 576 count++; 577 } 578 return count; 579 } 580 581 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 582 583 unsigned int num_packets_sent_classic = 0; 584 unsigned int num_packets_sent_le = 0; 585 586 btstack_linked_item_t *it; 587 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 588 hci_connection_t * connection = (hci_connection_t *) it; 589 if (hci_is_le_connection(connection)){ 590 num_packets_sent_le += connection->num_packets_sent; 591 } 592 if (connection->address_type == BD_ADDR_TYPE_ACL){ 593 num_packets_sent_classic += connection->num_packets_sent; 594 } 595 } 596 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 597 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 598 int free_slots_le = 0; 599 600 if (free_slots_classic < 0){ 601 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 602 return 0; 603 } 604 605 if (hci_stack->le_acl_packets_total_num){ 606 // if we have LE slots, they are used 607 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 608 if (free_slots_le < 0){ 609 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 610 return 0; 611 } 612 } else { 613 // otherwise, classic slots are used for LE, too 614 free_slots_classic -= num_packets_sent_le; 615 if (free_slots_classic < 0){ 616 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 617 return 0; 618 } 619 } 620 621 switch (address_type){ 622 case BD_ADDR_TYPE_UNKNOWN: 623 log_error("hci_number_free_acl_slots: unknown address type"); 624 return 0; 625 626 case BD_ADDR_TYPE_ACL: 627 return (uint16_t) free_slots_classic; 628 629 default: 630 if (hci_stack->le_acl_packets_total_num > 0){ 631 return (uint16_t) free_slots_le; 632 } 633 return (uint16_t) free_slots_classic; 634 } 635 } 636 637 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 638 // get connection type 639 hci_connection_t * connection = hci_connection_for_handle(con_handle); 640 if (!connection){ 641 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 642 return 0; 643 } 644 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 645 } 646 647 #ifdef ENABLE_CLASSIC 648 static int hci_number_free_sco_slots(void){ 649 unsigned int num_sco_packets_sent = 0; 650 btstack_linked_item_t *it; 651 if (hci_stack->synchronous_flow_control_enabled){ 652 // explicit flow control 653 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 654 hci_connection_t * connection = (hci_connection_t *) it; 655 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 656 num_sco_packets_sent += connection->num_packets_sent; 657 } 658 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 659 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 660 return 0; 661 } 662 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 663 } else { 664 // implicit flow control -- TODO 665 int num_ready = 0; 666 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 667 hci_connection_t * connection = (hci_connection_t *) it; 668 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 669 if (connection->sco_tx_ready == 0) continue; 670 num_ready++; 671 } 672 return num_ready; 673 } 674 } 675 #endif 676 677 // only used to send HCI Host Number Completed Packets 678 static int hci_can_send_comand_packet_transport(void){ 679 if (hci_stack->hci_packet_buffer_reserved) return 0; 680 681 // check for async hci transport implementations 682 if (hci_stack->hci_transport->can_send_packet_now){ 683 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 684 return 0; 685 } 686 } 687 return 1; 688 } 689 690 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 691 bool hci_can_send_command_packet_now(void){ 692 if (hci_can_send_comand_packet_transport() == 0) return false; 693 return hci_stack->num_cmd_packets > 0u; 694 } 695 696 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 697 // check for async hci transport implementations 698 if (!hci_stack->hci_transport->can_send_packet_now) return true; 699 return hci_stack->hci_transport->can_send_packet_now(packet_type); 700 } 701 702 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 703 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 704 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 705 } 706 707 bool hci_can_send_acl_le_packet_now(void){ 708 if (hci_stack->hci_packet_buffer_reserved) return false; 709 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 710 } 711 712 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 713 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 714 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 715 } 716 717 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 718 if (hci_stack->hci_packet_buffer_reserved) return false; 719 return hci_can_send_prepared_acl_packet_now(con_handle); 720 } 721 722 #ifdef ENABLE_CLASSIC 723 bool hci_can_send_acl_classic_packet_now(void){ 724 if (hci_stack->hci_packet_buffer_reserved) return false; 725 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 726 } 727 728 bool hci_can_send_prepared_sco_packet_now(void){ 729 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 730 if (hci_have_usb_transport()){ 731 return hci_stack->sco_can_send_now; 732 } else { 733 return hci_number_free_sco_slots() > 0; 734 } 735 } 736 737 bool hci_can_send_sco_packet_now(void){ 738 if (hci_stack->hci_packet_buffer_reserved) return false; 739 return hci_can_send_prepared_sco_packet_now(); 740 } 741 742 void hci_request_sco_can_send_now_event(void){ 743 hci_stack->sco_waiting_for_can_send_now = 1; 744 hci_notify_if_sco_can_send_now(); 745 } 746 #endif 747 748 // used for internal checks in l2cap.c 749 bool hci_is_packet_buffer_reserved(void){ 750 return hci_stack->hci_packet_buffer_reserved; 751 } 752 753 // reserves outgoing packet buffer. 754 // @return 1 if successful 755 bool hci_reserve_packet_buffer(void){ 756 if (hci_stack->hci_packet_buffer_reserved) { 757 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 758 return false; 759 } 760 hci_stack->hci_packet_buffer_reserved = true; 761 return true; 762 } 763 764 void hci_release_packet_buffer(void){ 765 hci_stack->hci_packet_buffer_reserved = false; 766 } 767 768 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 769 static int hci_transport_synchronous(void){ 770 return hci_stack->hci_transport->can_send_packet_now == NULL; 771 } 772 773 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 774 775 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 776 777 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 778 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 779 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 780 max_acl_data_packet_length = hci_stack->le_data_packets_length; 781 } 782 783 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 784 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 785 max_acl_data_packet_length = connection->le_max_tx_octets; 786 } 787 #endif 788 789 log_debug("hci_send_acl_packet_fragments entered"); 790 791 uint8_t status = ERROR_CODE_SUCCESS; 792 // multiple packets could be send on a synchronous HCI transport 793 while (true){ 794 795 log_debug("hci_send_acl_packet_fragments loop entered"); 796 797 // get current data 798 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 799 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 800 bool more_fragments = false; 801 802 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 803 if (current_acl_data_packet_length > max_acl_data_packet_length){ 804 more_fragments = true; 805 current_acl_data_packet_length = max_acl_data_packet_length; 806 } 807 808 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 809 if (acl_header_pos > 0u){ 810 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 811 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 812 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 813 } 814 815 // update header len 816 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 817 818 // count packet 819 connection->num_packets_sent++; 820 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 821 822 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 823 if (more_fragments){ 824 // update start of next fragment to send 825 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 826 } else { 827 // done 828 hci_stack->acl_fragmentation_pos = 0; 829 hci_stack->acl_fragmentation_total_size = 0; 830 } 831 832 // send packet 833 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 834 const int size = current_acl_data_packet_length + 4; 835 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 836 hci_stack->acl_fragmentation_tx_active = 1; 837 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 838 if (err != 0){ 839 // no error from HCI Transport expected 840 status = ERROR_CODE_HARDWARE_FAILURE; 841 } 842 843 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 844 845 // done yet? 846 if (!more_fragments) break; 847 848 // can send more? 849 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 850 } 851 852 log_debug("hci_send_acl_packet_fragments loop over"); 853 854 // release buffer now for synchronous transport 855 if (hci_transport_synchronous()){ 856 hci_stack->acl_fragmentation_tx_active = 0; 857 hci_release_packet_buffer(); 858 hci_emit_transport_packet_sent(); 859 } 860 861 return status; 862 } 863 864 // pre: caller has reserved the packet buffer 865 uint8_t hci_send_acl_packet_buffer(int size){ 866 btstack_assert(hci_stack->hci_packet_buffer_reserved); 867 868 uint8_t * packet = hci_stack->hci_packet_buffer; 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 873 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 hci_connection_t *connection = hci_connection_for_handle( con_handle); 880 if (!connection) { 881 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 882 hci_release_packet_buffer(); 883 hci_emit_transport_packet_sent(); 884 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 885 } 886 887 #ifdef ENABLE_CLASSIC 888 hci_connection_timestamp(connection); 889 #endif 890 891 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 892 893 // setup data 894 hci_stack->acl_fragmentation_total_size = size; 895 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 896 897 return hci_send_acl_packet_fragments(connection); 898 } 899 900 #ifdef ENABLE_CLASSIC 901 // pre: caller has reserved the packet buffer 902 uint8_t hci_send_sco_packet_buffer(int size){ 903 btstack_assert(hci_stack->hci_packet_buffer_reserved); 904 905 uint8_t * packet = hci_stack->hci_packet_buffer; 906 907 // skip checks in loopback mode 908 if (!hci_stack->loopback_mode){ 909 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 910 911 // check for free places on Bluetooth module 912 if (!hci_can_send_prepared_sco_packet_now()) { 913 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 914 hci_release_packet_buffer(); 915 hci_emit_transport_packet_sent(); 916 return BTSTACK_ACL_BUFFERS_FULL; 917 } 918 919 // track send packet in connection struct 920 hci_connection_t *connection = hci_connection_for_handle( con_handle); 921 if (!connection) { 922 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 923 hci_release_packet_buffer(); 924 hci_emit_transport_packet_sent(); 925 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 926 } 927 928 if (hci_have_usb_transport()){ 929 // token used 930 hci_stack->sco_can_send_now = false; 931 } else { 932 if (hci_stack->synchronous_flow_control_enabled){ 933 connection->num_packets_sent++; 934 } else { 935 connection->sco_tx_ready--; 936 } 937 } 938 } 939 940 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 941 942 #ifdef HAVE_SCO_TRANSPORT 943 hci_stack->sco_transport->send_packet(packet, size); 944 hci_release_packet_buffer(); 945 hci_emit_transport_packet_sent(); 946 947 return 0; 948 #else 949 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 950 if (hci_transport_synchronous()){ 951 hci_release_packet_buffer(); 952 hci_emit_transport_packet_sent(); 953 } 954 955 if (err != 0){ 956 return ERROR_CODE_HARDWARE_FAILURE; 957 } 958 return ERROR_CODE_SUCCESS; 959 #endif 960 } 961 #endif 962 963 static void acl_handler(uint8_t *packet, uint16_t size){ 964 965 // get info 966 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 967 hci_connection_t *conn = hci_connection_for_handle(con_handle); 968 uint8_t acl_flags = READ_ACL_FLAGS(packet); 969 uint16_t acl_length = READ_ACL_LENGTH(packet); 970 971 // ignore non-registered handle 972 if (!conn){ 973 log_error("acl_handler called with non-registered handle %u!" , con_handle); 974 return; 975 } 976 977 // assert packet is complete 978 if ((acl_length + 4u) != size){ 979 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 980 return; 981 } 982 983 #ifdef ENABLE_CLASSIC 984 // update idle timestamp 985 hci_connection_timestamp(conn); 986 #endif 987 988 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 989 hci_stack->host_completed_packets = 1; 990 conn->num_packets_completed++; 991 #endif 992 993 // handle different packet types 994 switch (acl_flags & 0x03u) { 995 996 case 0x01: // continuation fragment 997 998 // sanity checks 999 if (conn->acl_recombination_pos == 0u) { 1000 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1001 return; 1002 } 1003 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1004 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1005 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1006 conn->acl_recombination_pos = 0; 1007 return; 1008 } 1009 1010 // append fragment payload (header already stored) 1011 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1012 &packet[4], acl_length); 1013 conn->acl_recombination_pos += acl_length; 1014 1015 // forward complete L2CAP packet if complete. 1016 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1017 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1018 // reset recombination buffer 1019 conn->acl_recombination_length = 0; 1020 conn->acl_recombination_pos = 0; 1021 } 1022 break; 1023 1024 case 0x02: { // first fragment 1025 1026 // sanity check 1027 if (conn->acl_recombination_pos) { 1028 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1029 conn->acl_recombination_pos = 0; 1030 } 1031 1032 // peek into L2CAP packet! 1033 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1034 1035 // compare fragment size to L2CAP packet size 1036 if (acl_length >= (l2cap_length + 4u)){ 1037 // forward fragment as L2CAP packet 1038 hci_emit_acl_packet(packet, acl_length + 4u); 1039 } else { 1040 1041 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1042 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1043 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1044 return; 1045 } 1046 1047 // store first fragment and tweak acl length for complete package 1048 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1049 packet, acl_length + 4u); 1050 conn->acl_recombination_pos = acl_length + 4u; 1051 conn->acl_recombination_length = l2cap_length; 1052 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1053 } 1054 break; 1055 1056 } 1057 default: 1058 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1059 return; 1060 } 1061 1062 // execute main loop 1063 hci_run(); 1064 } 1065 1066 static void hci_connection_stop_timer(hci_connection_t * conn){ 1067 btstack_run_loop_remove_timer(&conn->timeout); 1068 #ifdef ENABLE_CLASSIC 1069 btstack_run_loop_remove_timer(&conn->timeout_sco); 1070 #endif 1071 } 1072 1073 static void hci_shutdown_connection(hci_connection_t *conn){ 1074 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1075 1076 #ifdef ENABLE_CLASSIC 1077 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1078 bd_addr_type_t addr_type = conn->address_type; 1079 #endif 1080 #ifdef HAVE_SCO_TRANSPORT 1081 hci_con_handle_t con_handle = conn->con_handle; 1082 #endif 1083 #endif 1084 1085 hci_connection_stop_timer(conn); 1086 1087 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1088 btstack_memory_hci_connection_free( conn ); 1089 1090 // now it's gone 1091 hci_emit_nr_connections_changed(); 1092 1093 #ifdef ENABLE_CLASSIC 1094 #ifdef ENABLE_SCO_OVER_HCI 1095 // update SCO 1096 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1097 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1098 } 1099 #endif 1100 #ifdef HAVE_SCO_TRANSPORT 1101 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1102 hci_stack->sco_transport->close(con_handle); 1103 } 1104 #endif 1105 #endif 1106 } 1107 1108 #ifdef ENABLE_CLASSIC 1109 1110 static const uint16_t packet_type_sizes[] = { 1111 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1112 HCI_ACL_DH1_SIZE, 0, 0, 0, 1113 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1114 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1115 }; 1116 static const uint8_t packet_type_feature_requirement_bit[] = { 1117 0, // 3 slot packets 1118 1, // 5 slot packets 1119 25, // EDR 2 mpbs 1120 26, // EDR 3 mbps 1121 39, // 3 slot EDR packts 1122 40, // 5 slot EDR packet 1123 }; 1124 static const uint16_t packet_type_feature_packet_mask[] = { 1125 0x0f00, // 3 slot packets 1126 0xf000, // 5 slot packets 1127 0x1102, // EDR 2 mpbs 1128 0x2204, // EDR 3 mbps 1129 0x0300, // 3 slot EDR packts 1130 0x3000, // 5 slot EDR packet 1131 }; 1132 1133 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1134 // enable packet types based on size 1135 uint16_t packet_types = 0; 1136 unsigned int i; 1137 for (i=0;i<16;i++){ 1138 if (packet_type_sizes[i] == 0) continue; 1139 if (packet_type_sizes[i] <= buffer_size){ 1140 packet_types |= 1 << i; 1141 } 1142 } 1143 // disable packet types due to missing local supported features 1144 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1145 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1146 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1147 if (feature_set) continue; 1148 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1149 packet_types &= ~packet_type_feature_packet_mask[i]; 1150 } 1151 // flip bits for "may not be used" 1152 packet_types ^= 0x3306; 1153 return packet_types; 1154 } 1155 1156 uint16_t hci_usable_acl_packet_types(void){ 1157 return hci_stack->packet_types; 1158 } 1159 #endif 1160 1161 uint8_t* hci_get_outgoing_packet_buffer(void){ 1162 // hci packet buffer is >= acl data packet length 1163 return hci_stack->hci_packet_buffer; 1164 } 1165 1166 uint16_t hci_max_acl_data_packet_length(void){ 1167 return hci_stack->acl_data_packet_length; 1168 } 1169 1170 #ifdef ENABLE_CLASSIC 1171 bool hci_extended_sco_link_supported(void){ 1172 // No. 31, byte 3, bit 7 1173 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1174 } 1175 #endif 1176 1177 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1178 // No. 54, byte 6, bit 6 1179 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1180 } 1181 1182 #ifdef ENABLE_CLASSIC 1183 static int gap_ssp_supported(void){ 1184 // No. 51, byte 6, bit 3 1185 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1186 } 1187 #endif 1188 1189 static int hci_classic_supported(void){ 1190 #ifdef ENABLE_CLASSIC 1191 // No. 37, byte 4, bit 5, = No BR/EDR Support 1192 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1193 #else 1194 return 0; 1195 #endif 1196 } 1197 1198 static int hci_le_supported(void){ 1199 #ifdef ENABLE_BLE 1200 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1201 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1202 #else 1203 return 0; 1204 #endif 1205 } 1206 1207 static bool hci_command_supported(uint8_t command_index){ 1208 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1209 } 1210 1211 #ifdef ENABLE_BLE 1212 1213 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1214 static bool hci_extended_advertising_supported(void){ 1215 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1216 } 1217 #endif 1218 1219 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1220 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1221 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1222 } else { 1223 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1224 } 1225 } 1226 1227 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1228 *addr_type = hci_stack->le_own_addr_type; 1229 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1230 } 1231 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1234 *addr_type = hci_stack->le_advertisements_own_addr_type; 1235 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1236 }; 1237 #endif 1238 1239 #ifdef ENABLE_LE_CENTRAL 1240 1241 /** 1242 * @brief Get own addr type and address used for LE connections (Central) 1243 */ 1244 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1245 *addr_type = hci_stack->le_connection_own_addr_type; 1246 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1247 } 1248 1249 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1250 1251 int offset = 3; 1252 int num_reports = packet[offset]; 1253 offset += 1; 1254 1255 int i; 1256 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1257 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1258 for (i=0; (i<num_reports) && (offset < size);i++){ 1259 // sanity checks on data_length: 1260 uint8_t data_length = packet[offset + 8]; 1261 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1262 if ((offset + 9u + data_length + 1u) > size) return; 1263 // setup event 1264 uint8_t event_size = 10u + data_length; 1265 int pos = 0; 1266 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1267 event[pos++] = event_size; 1268 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1269 offset += 8; 1270 pos += 8; 1271 event[pos++] = packet[offset + 1 + data_length]; // rssi 1272 event[pos++] = data_length; 1273 offset++; 1274 (void)memcpy(&event[pos], &packet[offset], data_length); 1275 pos += data_length; 1276 offset += data_length + 1u; // rssi 1277 hci_emit_event(event, pos, 1); 1278 } 1279 } 1280 #endif 1281 #endif 1282 1283 #ifdef ENABLE_BLE 1284 #ifdef ENABLE_LE_PERIPHERAL 1285 static void hci_update_advertisements_enabled_for_current_roles(void){ 1286 if (hci_stack->le_advertisements_enabled){ 1287 // get number of active le slave connections 1288 int num_slave_connections = 0; 1289 btstack_linked_list_iterator_t it; 1290 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1291 while (btstack_linked_list_iterator_has_next(&it)){ 1292 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1293 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1294 if (con->state != OPEN) continue; 1295 if (con->role != HCI_ROLE_SLAVE) continue; 1296 if (!hci_is_le_connection(con)) continue; 1297 num_slave_connections++; 1298 } 1299 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1300 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1301 } else { 1302 hci_stack->le_advertisements_enabled_for_current_roles = false; 1303 } 1304 } 1305 #endif 1306 #endif 1307 1308 #ifdef ENABLE_CLASSIC 1309 static void gap_run_set_local_name(void){ 1310 hci_reserve_packet_buffer(); 1311 uint8_t * packet = hci_stack->hci_packet_buffer; 1312 // construct HCI Command and send 1313 uint16_t opcode = hci_write_local_name.opcode; 1314 hci_stack->last_cmd_opcode = opcode; 1315 packet[0] = opcode & 0xff; 1316 packet[1] = opcode >> 8; 1317 packet[2] = DEVICE_NAME_LEN; 1318 memset(&packet[3], 0, DEVICE_NAME_LEN); 1319 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1320 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1321 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1322 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1323 // expand '00:00:00:00:00:00' in name with bd_addr 1324 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1325 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1326 } 1327 1328 static void gap_run_set_eir_data(void){ 1329 hci_reserve_packet_buffer(); 1330 uint8_t * packet = hci_stack->hci_packet_buffer; 1331 // construct HCI Command in-place and send 1332 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1333 hci_stack->last_cmd_opcode = opcode; 1334 uint16_t offset = 0; 1335 packet[offset++] = opcode & 0xff; 1336 packet[offset++] = opcode >> 8; 1337 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1338 packet[offset++] = 0; // FEC not required 1339 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1340 if (hci_stack->eir_data){ 1341 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1342 ad_context_t context; 1343 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1344 uint8_t data_type = ad_iterator_get_data_type(&context); 1345 uint8_t size = ad_iterator_get_data_len(&context); 1346 const uint8_t *data = ad_iterator_get_data(&context); 1347 // copy item 1348 packet[offset++] = size + 1; 1349 packet[offset++] = data_type; 1350 memcpy(&packet[offset], data, size); 1351 // update name item 1352 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1353 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1354 } 1355 offset += size; 1356 } 1357 } else { 1358 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1359 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1360 packet[offset++] = bytes_to_copy + 1; 1361 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1362 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1363 // expand '00:00:00:00:00:00' in name with bd_addr 1364 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1365 } 1366 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1367 } 1368 1369 static void hci_run_gap_tasks_classic(void){ 1370 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1371 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1372 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1373 return; 1374 } 1375 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1376 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1377 gap_run_set_local_name(); 1378 return; 1379 } 1380 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1381 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1382 gap_run_set_eir_data(); 1383 return; 1384 } 1385 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1386 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1387 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1388 return; 1389 } 1390 // write page scan activity 1391 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1392 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1393 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1394 return; 1395 } 1396 // write page scan type 1397 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1398 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1399 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1400 return; 1401 } 1402 // write page timeout 1403 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1404 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1405 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1406 return; 1407 } 1408 // send scan enable 1409 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1410 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1411 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1412 return; 1413 } 1414 // send write scan activity 1415 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1416 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1417 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1418 return; 1419 } 1420 } 1421 #endif 1422 1423 #ifndef HAVE_HOST_CONTROLLER_API 1424 1425 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1426 if (!hci_stack->config) return 0; 1427 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1428 // Limit baud rate for Broadcom chipsets to 3 mbps 1429 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1430 baud_rate = 3000000; 1431 } 1432 return baud_rate; 1433 } 1434 1435 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1436 UNUSED(ds); 1437 1438 switch (hci_stack->substate){ 1439 case HCI_INIT_W4_SEND_RESET: 1440 log_info("Resend HCI Reset"); 1441 hci_stack->substate = HCI_INIT_SEND_RESET; 1442 hci_stack->num_cmd_packets = 1; 1443 hci_run(); 1444 break; 1445 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1446 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1447 if (hci_stack->hci_transport->reset_link){ 1448 hci_stack->hci_transport->reset_link(); 1449 } 1450 1451 /* fall through */ 1452 1453 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1454 log_info("Resend HCI Reset - CSR Warm Boot"); 1455 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1456 hci_stack->num_cmd_packets = 1; 1457 hci_run(); 1458 break; 1459 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1460 if (hci_stack->hci_transport->set_baudrate){ 1461 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1462 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1463 hci_stack->hci_transport->set_baudrate(baud_rate); 1464 } 1465 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1466 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1467 if (hci_stack->hci_transport->reset_link){ 1468 log_info("Link Reset"); 1469 hci_stack->hci_transport->reset_link(); 1470 } 1471 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1472 hci_run(); 1473 } 1474 break; 1475 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1476 // otherwise continue 1477 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1478 hci_send_cmd(&hci_read_local_supported_commands); 1479 break; 1480 default: 1481 break; 1482 } 1483 } 1484 #endif 1485 1486 static void hci_initializing_next_state(void){ 1487 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1488 } 1489 1490 static void hci_init_done(void){ 1491 // done. tell the app 1492 log_info("hci_init_done -> HCI_STATE_WORKING"); 1493 hci_stack->state = HCI_STATE_WORKING; 1494 hci_emit_state(); 1495 } 1496 1497 // assumption: hci_can_send_command_packet_now() == true 1498 static void hci_initializing_run(void){ 1499 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1500 1501 if (!hci_can_send_command_packet_now()) return; 1502 1503 #ifndef HAVE_HOST_CONTROLLER_API 1504 bool need_baud_change = hci_stack->config 1505 && hci_stack->chipset 1506 && hci_stack->chipset->set_baudrate_command 1507 && hci_stack->hci_transport->set_baudrate 1508 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1509 #endif 1510 1511 switch (hci_stack->substate){ 1512 case HCI_INIT_SEND_RESET: 1513 hci_state_reset(); 1514 1515 #ifndef HAVE_HOST_CONTROLLER_API 1516 // prepare reset if command complete not received in 100ms 1517 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1518 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1519 btstack_run_loop_add_timer(&hci_stack->timeout); 1520 #endif 1521 // send command 1522 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1523 hci_send_cmd(&hci_reset); 1524 break; 1525 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1526 hci_send_cmd(&hci_read_local_version_information); 1527 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1528 break; 1529 1530 #ifndef HAVE_HOST_CONTROLLER_API 1531 case HCI_INIT_SEND_READ_LOCAL_NAME: 1532 hci_send_cmd(&hci_read_local_name); 1533 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1534 break; 1535 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1536 hci_state_reset(); 1537 // prepare reset if command complete not received in 100ms 1538 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1539 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1540 btstack_run_loop_add_timer(&hci_stack->timeout); 1541 // send command 1542 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1543 hci_send_cmd(&hci_reset); 1544 break; 1545 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1546 hci_state_reset(); 1547 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1548 hci_send_cmd(&hci_reset); 1549 break; 1550 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1551 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1552 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1553 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1554 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1555 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1556 break; 1557 } 1558 case HCI_INIT_SET_BD_ADDR: 1559 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1560 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1561 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1562 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1563 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1564 break; 1565 case HCI_INIT_SEND_BAUD_CHANGE: 1566 if (need_baud_change) { 1567 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1568 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1569 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1570 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1571 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1572 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1573 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1574 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1575 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1576 btstack_run_loop_add_timer(&hci_stack->timeout); 1577 } 1578 break; 1579 } 1580 1581 /* fall through */ 1582 1583 case HCI_INIT_CUSTOM_INIT: 1584 // Custom initialization 1585 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1586 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1587 bool send_cmd = false; 1588 switch (hci_stack->chipset_result){ 1589 case BTSTACK_CHIPSET_VALID_COMMAND: 1590 send_cmd = true; 1591 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1592 break; 1593 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1594 send_cmd = true; 1595 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1596 log_info("CSR Warm Boot"); 1597 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1598 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1599 btstack_run_loop_add_timer(&hci_stack->timeout); 1600 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1601 && hci_stack->config 1602 && hci_stack->chipset 1603 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1604 && hci_stack->hci_transport->set_baudrate 1605 && hci_transport_uart_get_main_baud_rate()){ 1606 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1607 } else { 1608 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1609 } 1610 break; 1611 default: 1612 break; 1613 } 1614 1615 if (send_cmd){ 1616 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1617 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1618 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1619 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1620 break; 1621 } 1622 log_info("Init script done"); 1623 1624 // Init script download on Broadcom chipsets causes: 1625 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1626 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1627 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1628 1629 // - baud rate to reset, restore UART baud rate if needed 1630 if (need_baud_change) { 1631 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1632 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1633 hci_stack->hci_transport->set_baudrate(baud_rate); 1634 } 1635 1636 uint16_t bcm_delay_ms = 300; 1637 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1638 // -> Work around: wait here. 1639 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1640 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1641 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1642 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1643 btstack_run_loop_add_timer(&hci_stack->timeout); 1644 break; 1645 } 1646 } 1647 #endif 1648 /* fall through */ 1649 1650 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1651 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1652 hci_send_cmd(&hci_read_local_supported_commands); 1653 break; 1654 case HCI_INIT_READ_BD_ADDR: 1655 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1656 hci_send_cmd(&hci_read_bd_addr); 1657 break; 1658 case HCI_INIT_READ_BUFFER_SIZE: 1659 // only read buffer size if supported 1660 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1661 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1662 hci_send_cmd(&hci_read_buffer_size); 1663 break; 1664 } 1665 1666 /* fall through */ 1667 1668 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1669 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1670 hci_send_cmd(&hci_read_local_supported_features); 1671 break; 1672 1673 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1674 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1675 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1676 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1677 break; 1678 case HCI_INIT_HOST_BUFFER_SIZE: 1679 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1680 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1681 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1682 break; 1683 #endif 1684 1685 case HCI_INIT_SET_EVENT_MASK: 1686 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1687 if (hci_le_supported()){ 1688 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1689 } else { 1690 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1691 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1692 } 1693 break; 1694 1695 #ifdef ENABLE_CLASSIC 1696 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1697 if (hci_classic_supported() && gap_ssp_supported()){ 1698 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1699 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1700 break; 1701 } 1702 1703 /* fall through */ 1704 1705 case HCI_INIT_WRITE_INQUIRY_MODE: 1706 if (hci_classic_supported()){ 1707 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1708 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1709 break; 1710 } 1711 1712 /* fall through */ 1713 1714 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1715 // skip write secure connections host support if not supported or disabled 1716 if (hci_classic_supported() && hci_stack->secure_connections_enable 1717 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1718 hci_stack->secure_connections_active = true; 1719 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1720 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1721 break; 1722 } 1723 1724 #ifdef ENABLE_SCO_OVER_HCI 1725 /* fall through */ 1726 1727 // only sent if ENABLE_SCO_OVER_HCI is defined 1728 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1729 // skip write synchronous flow control if not supported 1730 if (hci_classic_supported() 1731 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1732 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1733 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1734 break; 1735 } 1736 /* fall through */ 1737 1738 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1739 // skip write default erroneous data reporting if not supported 1740 if (hci_classic_supported() 1741 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1742 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1743 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1744 break; 1745 } 1746 #endif 1747 1748 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1749 /* fall through */ 1750 1751 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1752 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1753 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1754 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1755 #ifdef ENABLE_SCO_OVER_HCI 1756 log_info("BCM: Route SCO data via HCI transport"); 1757 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1758 #endif 1759 #ifdef ENABLE_SCO_OVER_PCM 1760 log_info("BCM: Route SCO data via PCM interface"); 1761 #ifdef ENABLE_BCM_PCM_WBS 1762 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1763 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1764 #else 1765 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1766 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1767 #endif 1768 #endif 1769 break; 1770 } 1771 #endif 1772 1773 #ifdef ENABLE_SCO_OVER_PCM 1774 /* fall through */ 1775 1776 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1777 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1778 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1779 log_info("BCM: Config PCM interface for I2S"); 1780 #ifdef ENABLE_BCM_PCM_WBS 1781 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1782 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1783 #else 1784 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1785 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1786 #endif 1787 break; 1788 } 1789 #endif 1790 #endif 1791 1792 #ifdef ENABLE_BLE 1793 /* fall through */ 1794 1795 // LE INIT 1796 case HCI_INIT_LE_READ_BUFFER_SIZE: 1797 if (hci_le_supported()){ 1798 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1799 hci_send_cmd(&hci_le_read_buffer_size); 1800 break; 1801 } 1802 1803 /* fall through */ 1804 1805 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1806 // skip write le host if not supported (e.g. on LE only EM9301) 1807 if (hci_le_supported() 1808 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1809 // LE Supported Host = 1, Simultaneous Host = 0 1810 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1811 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1812 break; 1813 } 1814 1815 /* fall through */ 1816 1817 case HCI_INIT_LE_SET_EVENT_MASK: 1818 if (hci_le_supported()){ 1819 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1820 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1821 break; 1822 } 1823 #endif 1824 1825 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1826 /* fall through */ 1827 1828 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1829 if (hci_le_supported() 1830 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1831 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1832 hci_send_cmd(&hci_le_read_maximum_data_length); 1833 break; 1834 } 1835 1836 /* fall through */ 1837 1838 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1839 if (hci_le_supported() 1840 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1841 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1842 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1843 break; 1844 } 1845 #endif 1846 1847 #ifdef ENABLE_LE_CENTRAL 1848 /* fall through */ 1849 1850 case HCI_INIT_READ_WHITE_LIST_SIZE: 1851 if (hci_le_supported()){ 1852 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1853 hci_send_cmd(&hci_le_read_white_list_size); 1854 break; 1855 } 1856 1857 #endif 1858 1859 /* fall through */ 1860 1861 case HCI_INIT_DONE: 1862 hci_stack->substate = HCI_INIT_DONE; 1863 // main init sequence complete 1864 #ifdef ENABLE_CLASSIC 1865 // check if initial Classic GAP Tasks are completed 1866 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1867 hci_run_gap_tasks_classic(); 1868 break; 1869 } 1870 #endif 1871 #ifdef ENABLE_BLE 1872 #ifdef ENABLE_LE_CENTRAL 1873 // check if initial LE GAP Tasks are completed 1874 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1875 hci_run_general_gap_le(); 1876 break; 1877 } 1878 #endif 1879 #endif 1880 hci_init_done(); 1881 break; 1882 1883 default: 1884 return; 1885 } 1886 } 1887 1888 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1889 bool command_completed = false; 1890 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1891 uint16_t opcode = little_endian_read_16(packet,3); 1892 if (opcode == hci_stack->last_cmd_opcode){ 1893 command_completed = true; 1894 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1895 } else { 1896 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1897 } 1898 } 1899 1900 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1901 uint8_t status = packet[2]; 1902 uint16_t opcode = little_endian_read_16(packet,4); 1903 if (opcode == hci_stack->last_cmd_opcode){ 1904 if (status){ 1905 command_completed = true; 1906 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1907 } else { 1908 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1909 } 1910 } else { 1911 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1912 } 1913 } 1914 #ifndef HAVE_HOST_CONTROLLER_API 1915 // Vendor == CSR 1916 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1917 // TODO: track actual command 1918 command_completed = true; 1919 } 1920 1921 // Vendor == Toshiba 1922 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1923 // TODO: track actual command 1924 command_completed = true; 1925 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1926 hci_stack->num_cmd_packets = 1; 1927 } 1928 #endif 1929 1930 return command_completed; 1931 } 1932 1933 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1934 1935 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1936 1937 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1938 1939 #ifndef HAVE_HOST_CONTROLLER_API 1940 1941 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1942 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1943 // 1944 // HCI Reset 1945 // Timeout 100 ms 1946 // HCI Reset 1947 // Command Complete Reset 1948 // HCI Read Local Version Information 1949 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1950 // hang... 1951 // 1952 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1953 if (!command_completed 1954 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1955 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1956 1957 uint16_t opcode = little_endian_read_16(packet,3); 1958 if (opcode == hci_reset.opcode){ 1959 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1960 return; 1961 } 1962 } 1963 1964 // CSR & H5 1965 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1966 if (!command_completed 1967 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1968 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1969 1970 uint16_t opcode = little_endian_read_16(packet,3); 1971 if (opcode == hci_reset.opcode){ 1972 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1973 return; 1974 } 1975 } 1976 1977 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1978 // fix: Correct substate and behave as command below 1979 if (command_completed){ 1980 switch (hci_stack->substate){ 1981 case HCI_INIT_SEND_RESET: 1982 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1983 break; 1984 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1985 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1986 break; 1987 default: 1988 break; 1989 } 1990 } 1991 1992 #endif 1993 1994 if (!command_completed) return; 1995 1996 bool need_baud_change = false; 1997 bool need_addr_change = false; 1998 1999 #ifndef HAVE_HOST_CONTROLLER_API 2000 need_baud_change = hci_stack->config 2001 && hci_stack->chipset 2002 && hci_stack->chipset->set_baudrate_command 2003 && hci_stack->hci_transport->set_baudrate 2004 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2005 2006 need_addr_change = hci_stack->custom_bd_addr_set 2007 && hci_stack->chipset 2008 && hci_stack->chipset->set_bd_addr_command; 2009 #endif 2010 2011 switch(hci_stack->substate){ 2012 2013 #ifndef HAVE_HOST_CONTROLLER_API 2014 case HCI_INIT_SEND_RESET: 2015 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2016 // fix: just correct substate and behave as command below 2017 2018 /* fall through */ 2019 #endif 2020 2021 case HCI_INIT_W4_SEND_RESET: 2022 btstack_run_loop_remove_timer(&hci_stack->timeout); 2023 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2024 return; 2025 2026 #ifndef HAVE_HOST_CONTROLLER_API 2027 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2028 // for STLC2500D, baud rate change already happened. 2029 // for others, baud rate gets changed now 2030 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2031 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2032 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2033 hci_stack->hci_transport->set_baudrate(baud_rate); 2034 } 2035 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2036 return; 2037 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2038 btstack_run_loop_remove_timer(&hci_stack->timeout); 2039 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2040 return; 2041 case HCI_INIT_W4_CUSTOM_INIT: 2042 // repeat custom init 2043 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2044 return; 2045 #endif 2046 2047 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2048 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2049 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2050 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2051 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2052 return; 2053 } 2054 if (need_addr_change){ 2055 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2056 return; 2057 } 2058 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2059 return; 2060 #ifndef HAVE_HOST_CONTROLLER_API 2061 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2062 if (need_baud_change){ 2063 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2064 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2065 hci_stack->hci_transport->set_baudrate(baud_rate); 2066 } 2067 if (need_addr_change){ 2068 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2069 return; 2070 } 2071 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2072 return; 2073 case HCI_INIT_W4_SET_BD_ADDR: 2074 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2075 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2076 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2077 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2078 return; 2079 } 2080 // skipping st warm boot 2081 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2082 return; 2083 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2084 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2085 return; 2086 #endif 2087 2088 case HCI_INIT_DONE: 2089 // set state if we came here by fall through 2090 hci_stack->substate = HCI_INIT_DONE; 2091 return; 2092 2093 default: 2094 break; 2095 } 2096 hci_initializing_next_state(); 2097 } 2098 2099 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2100 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2101 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2102 // check if the hci connection has been outgoing 2103 switch (conn->state){ 2104 case SEND_CREATE_CONNECTION: 2105 case RECEIVED_CONNECTION_REQUEST: 2106 break; 2107 default: 2108 return; 2109 } 2110 2111 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2112 bd_addr_t bd_address; 2113 (void)memcpy(&bd_address, conn->address, 6); 2114 2115 #ifdef ENABLE_CLASSIC 2116 // cache needed data 2117 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2118 #endif 2119 2120 // connection failed, remove entry 2121 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2122 btstack_memory_hci_connection_free( conn ); 2123 2124 #ifdef ENABLE_CLASSIC 2125 // notify client if dedicated bonding 2126 if (notify_dedicated_bonding_failed){ 2127 log_info("hci notify_dedicated_bonding_failed"); 2128 hci_emit_dedicated_bonding_result(bd_address, status); 2129 } 2130 2131 // if authentication error, also delete link key 2132 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2133 gap_drop_link_key_for_bd_addr(bd_address); 2134 } 2135 #else 2136 UNUSED(status); 2137 #endif 2138 } 2139 2140 #ifdef ENABLE_CLASSIC 2141 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2142 // SSP Controller 2143 if (features[6] & (1 << 3)){ 2144 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2145 } 2146 // eSCO 2147 if (features[3] & (1<<7)){ 2148 conn->remote_supported_features[0] |= 1; 2149 } 2150 // Extended features 2151 if (features[7] & (1<<7)){ 2152 conn->remote_supported_features[0] |= 2; 2153 } 2154 } 2155 2156 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2157 // SSP Host 2158 if (features[0] & (1 << 0)){ 2159 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2160 } 2161 // SC Host 2162 if (features[0] & (1 << 3)){ 2163 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2164 } 2165 } 2166 2167 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2168 // SC Controller 2169 if (features[1] & (1 << 0)){ 2170 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2171 } 2172 } 2173 2174 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2175 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2176 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2177 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2178 if (conn->bonding_flags & BONDING_DEDICATED){ 2179 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2180 } 2181 } 2182 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2183 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2184 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2185 } 2186 2187 #endif 2188 2189 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2190 // handle BT initialization 2191 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2192 hci_initializing_event_handler(packet, size); 2193 } 2194 2195 // help with BT sleep 2196 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2197 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2198 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2199 hci_initializing_next_state(); 2200 } 2201 } 2202 2203 #ifdef ENABLE_CLASSIC 2204 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2205 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2206 conn->encryption_key_size = encryption_key_size; 2207 2208 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2209 conn->requested_security_level = LEVEL_0; 2210 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2211 return; 2212 } 2213 2214 // Request remote features if not already done 2215 hci_trigger_remote_features_for_connection(conn); 2216 2217 // Request Authentication if not already done 2218 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2219 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2220 } 2221 #endif 2222 2223 static void hci_store_local_supported_commands(const uint8_t * packet){ 2224 // create mapping table 2225 #define X(name, offset, bit) { offset, bit }, 2226 static struct { 2227 uint8_t byte_offset; 2228 uint8_t bit_position; 2229 } supported_hci_commands_map [] = { 2230 SUPPORTED_HCI_COMMANDS 2231 }; 2232 #undef X 2233 2234 // create names for debug purposes 2235 #ifdef ENABLE_LOG_DEBUG 2236 #define X(name, offset, bit) #name, 2237 static const char * command_names[] = { 2238 SUPPORTED_HCI_COMMANDS 2239 }; 2240 #undef X 2241 #endif 2242 2243 hci_stack->local_supported_commands = 0; 2244 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2245 uint16_t i; 2246 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2247 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2248 #ifdef ENABLE_LOG_DEBUG 2249 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); 2250 #else 2251 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2252 #endif 2253 hci_stack->local_supported_commands |= (1LU << i); 2254 } 2255 } 2256 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2257 } 2258 2259 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2260 UNUSED(size); 2261 2262 uint16_t manufacturer; 2263 #ifdef ENABLE_CLASSIC 2264 hci_con_handle_t handle; 2265 hci_connection_t * conn; 2266 uint8_t status; 2267 #endif 2268 // get num cmd packets - limit to 1 to reduce complexity 2269 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2270 2271 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2272 switch (opcode){ 2273 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2274 if (packet[5]) break; 2275 // terminate, name 248 chars 2276 packet[6+248] = 0; 2277 log_info("local name: %s", &packet[6]); 2278 break; 2279 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2280 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2281 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2282 uint16_t acl_len = little_endian_read_16(packet, 6); 2283 uint16_t sco_len = packet[8]; 2284 2285 // determine usable ACL/SCO payload size 2286 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2287 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2288 2289 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2290 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2291 2292 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2293 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2294 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2295 } 2296 break; 2297 case HCI_OPCODE_HCI_READ_RSSI: 2298 if (packet[5] == ERROR_CODE_SUCCESS){ 2299 uint8_t event[5]; 2300 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2301 event[1] = 3; 2302 (void)memcpy(&event[2], &packet[6], 3); 2303 hci_emit_event(event, sizeof(event), 1); 2304 } 2305 break; 2306 #ifdef ENABLE_BLE 2307 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2308 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2309 hci_stack->le_acl_packets_total_num = packet[8]; 2310 // determine usable ACL payload size 2311 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2312 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2313 } 2314 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2315 break; 2316 #endif 2317 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2318 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2319 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2320 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2321 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); 2322 break; 2323 #endif 2324 #ifdef ENABLE_LE_CENTRAL 2325 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2326 hci_stack->le_whitelist_capacity = packet[6]; 2327 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2328 break; 2329 #endif 2330 case HCI_OPCODE_HCI_READ_BD_ADDR: 2331 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2332 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)); 2333 #ifdef ENABLE_CLASSIC 2334 if (hci_stack->link_key_db){ 2335 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2336 } 2337 #endif 2338 break; 2339 #ifdef ENABLE_CLASSIC 2340 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2341 hci_emit_discoverable_enabled(hci_stack->discoverable); 2342 break; 2343 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2344 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2345 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2346 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2347 hci_emit_event(event, sizeof(event), 1); 2348 } 2349 break; 2350 #endif 2351 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2352 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2353 2354 #ifdef ENABLE_CLASSIC 2355 // determine usable ACL packet types based on host buffer size and supported features 2356 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2357 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2358 #endif 2359 // Classic/LE 2360 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2361 break; 2362 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2363 manufacturer = little_endian_read_16(packet, 10); 2364 // map Cypress to Broadcom 2365 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2366 log_info("Treat Cypress as Broadcom"); 2367 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2368 little_endian_store_16(packet, 10, manufacturer); 2369 } 2370 hci_stack->manufacturer = manufacturer; 2371 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2372 break; 2373 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2374 hci_store_local_supported_commands(packet); 2375 break; 2376 #ifdef ENABLE_CLASSIC 2377 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2378 if (packet[5]) return; 2379 hci_stack->synchronous_flow_control_enabled = 1; 2380 break; 2381 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2382 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2383 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2384 conn = hci_connection_for_handle(handle); 2385 if (conn != NULL) { 2386 uint8_t key_size = 0; 2387 if (status == 0){ 2388 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2389 log_info("Handle %04x key Size: %u", handle, key_size); 2390 } else { 2391 key_size = 1; 2392 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2393 } 2394 hci_handle_read_encryption_key_size_complete(conn, key_size); 2395 } 2396 break; 2397 // assert pairing complete event is emitted. 2398 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2399 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2400 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2401 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2402 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2403 // lookup connection by gap pairing addr 2404 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2405 if (conn == NULL) break; 2406 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2407 break; 2408 2409 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2410 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2411 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2412 uint8_t event[67]; 2413 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2414 event[1] = 65; 2415 (void)memset(&event[2], 0, 65); 2416 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2417 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2418 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2419 event[2] = 3; 2420 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2421 } else { 2422 event[2] = 1; 2423 } 2424 } 2425 hci_emit_event(event, sizeof(event), 0); 2426 break; 2427 } 2428 2429 // note: only needed if user does not provide OOB data 2430 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2431 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2432 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2433 if (conn == NULL) break; 2434 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2435 break; 2436 #endif 2437 #endif 2438 default: 2439 break; 2440 } 2441 } 2442 2443 #ifdef ENABLE_BLE 2444 static void event_handle_le_connection_complete(const uint8_t * packet){ 2445 bd_addr_t addr; 2446 bd_addr_type_t addr_type; 2447 hci_connection_t * conn; 2448 2449 // Connection management 2450 reverse_bd_addr(&packet[8], addr); 2451 addr_type = (bd_addr_type_t)packet[7]; 2452 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2453 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2454 2455 #ifdef ENABLE_LE_CENTRAL 2456 // handle error: error is reported only to the initiator -> outgoing connection 2457 if (packet[3]){ 2458 2459 // handle cancelled outgoing connection 2460 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2461 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2462 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2463 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2464 // reset state 2465 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2466 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2467 // get outgoing connection conn struct for direct connect 2468 conn = gap_get_outgoing_connection(); 2469 } 2470 2471 // outgoing le connection establishment is done 2472 if (conn){ 2473 // remove entry 2474 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2475 btstack_memory_hci_connection_free( conn ); 2476 } 2477 return; 2478 } 2479 #endif 2480 2481 // on success, both hosts receive connection complete event 2482 if (packet[6] == HCI_ROLE_MASTER){ 2483 #ifdef ENABLE_LE_CENTRAL 2484 // if we're master on an le connection, it was an outgoing connection and we're done with it 2485 // note: no hci_connection_t object exists yet for connect with whitelist 2486 if (hci_is_le_connection_type(addr_type)){ 2487 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2488 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2489 } 2490 #endif 2491 } else { 2492 #ifdef ENABLE_LE_PERIPHERAL 2493 // if we're slave, it was an incoming connection, advertisements have stopped 2494 hci_stack->le_advertisements_active = false; 2495 #endif 2496 } 2497 2498 // LE connections are auto-accepted, so just create a connection if there isn't one already 2499 if (!conn){ 2500 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2501 } 2502 2503 // no memory, sorry. 2504 if (!conn){ 2505 return; 2506 } 2507 2508 conn->state = OPEN; 2509 conn->role = packet[6]; 2510 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2511 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2512 2513 #ifdef ENABLE_LE_PERIPHERAL 2514 if (packet[6] == HCI_ROLE_SLAVE){ 2515 hci_update_advertisements_enabled_for_current_roles(); 2516 } 2517 #endif 2518 2519 // init unenhanced att bearer mtu 2520 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2521 conn->att_connection.mtu_exchanged = false; 2522 2523 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2524 2525 // restart timer 2526 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2527 // btstack_run_loop_add_timer(&conn->timeout); 2528 2529 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2530 2531 hci_emit_nr_connections_changed(); 2532 } 2533 #endif 2534 2535 #ifdef ENABLE_CLASSIC 2536 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){ 2537 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2538 // LEVEL_4 is tested by l2cap 2539 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2540 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2541 if (level >= LEVEL_3){ 2542 // MITM not possible without keyboard or display 2543 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2544 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2545 2546 // MITM possible if one side has keyboard and the other has keyboard or display 2547 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2548 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2549 2550 // MITM not possible if one side has only display and other side has no keyboard 2551 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2552 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2553 } 2554 // LEVEL 2 requires SSP, which is a given 2555 return true; 2556 } 2557 2558 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2559 uint16_t i; 2560 for (i=0; i < size ; i++){ 2561 if (data[i] != 0) { 2562 return false; 2563 } 2564 } 2565 return true; 2566 } 2567 2568 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2569 // get requested security level 2570 gap_security_level_t requested_security_level = conn->requested_security_level; 2571 if (hci_stack->gap_secure_connections_only_mode){ 2572 requested_security_level = LEVEL_4; 2573 } 2574 2575 // assess security: LEVEL 4 requires SC 2576 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2577 if ((requested_security_level == LEVEL_4) && 2578 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2579 !hci_remote_sc_enabled(conn)){ 2580 log_info("Level 4 required, but SC not supported -> abort"); 2581 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2582 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2583 return; 2584 } 2585 2586 // assess security based on io capabilities 2587 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2588 // responder: fully validate io caps of both sides as well as OOB data 2589 bool security_possible = false; 2590 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2591 2592 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2593 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2594 // so we merge the OOB data availability 2595 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2596 if (conn->classic_oob_c_192 != NULL){ 2597 have_oob_data |= 1; 2598 } 2599 if (conn->classic_oob_c_256 != NULL){ 2600 have_oob_data |= 2; 2601 } 2602 // for up to Level 3, either P-192 as well as P-256 will do 2603 // 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 2604 // if remote does not SC, we should not receive P-256 data either 2605 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2606 security_possible = true; 2607 } 2608 // for Level 4, P-256 is needed 2609 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2610 security_possible = true; 2611 } 2612 #endif 2613 2614 if (security_possible == false){ 2615 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2616 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2617 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2618 return; 2619 } 2620 } else { 2621 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2622 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2623 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2624 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2625 log_info("Level 3+ required, but no input/output -> abort"); 2626 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2627 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2628 return; 2629 } 2630 #endif 2631 #endif 2632 } 2633 2634 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2635 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2636 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2637 } else { 2638 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2639 } 2640 #endif 2641 } 2642 2643 #endif 2644 2645 static void event_handler(uint8_t *packet, uint16_t size){ 2646 2647 uint16_t event_length = packet[1]; 2648 2649 // assert packet is complete 2650 if (size != (event_length + 2u)){ 2651 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2652 return; 2653 } 2654 2655 bd_addr_type_t addr_type; 2656 hci_con_handle_t handle; 2657 hci_connection_t * conn; 2658 int i; 2659 int create_connection_cmd; 2660 2661 #ifdef ENABLE_CLASSIC 2662 hci_link_type_t link_type; 2663 bd_addr_t addr; 2664 #endif 2665 2666 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2667 2668 switch (hci_event_packet_get_type(packet)) { 2669 2670 case HCI_EVENT_COMMAND_COMPLETE: 2671 handle_command_complete_event(packet, size); 2672 break; 2673 2674 case HCI_EVENT_COMMAND_STATUS: 2675 // get num cmd packets - limit to 1 to reduce complexity 2676 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2677 2678 // check command status to detected failed outgoing connections 2679 create_connection_cmd = 0; 2680 #ifdef ENABLE_CLASSIC 2681 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2682 create_connection_cmd = 1; 2683 } 2684 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2685 create_connection_cmd = 1; 2686 } 2687 #endif 2688 #ifdef ENABLE_LE_CENTRAL 2689 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2690 create_connection_cmd = 1; 2691 } 2692 #endif 2693 if (create_connection_cmd) { 2694 uint8_t status = hci_event_command_status_get_status(packet); 2695 addr_type = hci_stack->outgoing_addr_type; 2696 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2697 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); 2698 2699 // reset outgoing address info 2700 memset(hci_stack->outgoing_addr, 0, 6); 2701 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2702 2703 // on error 2704 if (status != ERROR_CODE_SUCCESS){ 2705 #ifdef ENABLE_LE_CENTRAL 2706 if (hci_is_le_connection_type(addr_type)){ 2707 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2708 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2709 } 2710 #endif 2711 // error => outgoing connection failed 2712 if (conn != NULL){ 2713 hci_handle_connection_failed(conn, status); 2714 } 2715 } 2716 } 2717 2718 #ifdef ENABLE_CLASSIC 2719 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2720 uint8_t status = hci_event_command_status_get_status(packet); 2721 log_info("command status (inquiry), status %x", status); 2722 if (status == ERROR_CODE_SUCCESS) { 2723 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2724 } else { 2725 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2726 } 2727 } 2728 #endif 2729 break; 2730 2731 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2732 if (size < 3) return; 2733 uint16_t num_handles = packet[2]; 2734 if (size != (3u + num_handles * 4u)) return; 2735 uint16_t offset = 3; 2736 for (i=0; i<num_handles;i++){ 2737 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2738 offset += 2u; 2739 uint16_t num_packets = little_endian_read_16(packet, offset); 2740 offset += 2u; 2741 2742 conn = hci_connection_for_handle(handle); 2743 if (!conn){ 2744 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2745 continue; 2746 } 2747 2748 if (conn->num_packets_sent >= num_packets){ 2749 conn->num_packets_sent -= num_packets; 2750 } else { 2751 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2752 conn->num_packets_sent = 0; 2753 } 2754 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2755 2756 #ifdef ENABLE_CLASSIC 2757 // For SCO, we do the can_send_now_check here 2758 hci_notify_if_sco_can_send_now(); 2759 #endif 2760 } 2761 break; 2762 } 2763 2764 #ifdef ENABLE_CLASSIC 2765 case HCI_EVENT_INQUIRY_COMPLETE: 2766 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2767 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2768 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2769 hci_emit_event(event, sizeof(event), 1); 2770 } 2771 break; 2772 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2773 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2774 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2775 } 2776 break; 2777 case HCI_EVENT_CONNECTION_REQUEST: 2778 reverse_bd_addr(&packet[2], addr); 2779 link_type = (hci_link_type_t) packet[11]; 2780 2781 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2782 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2783 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2784 bd_addr_copy(hci_stack->decline_addr, addr); 2785 break; 2786 } 2787 2788 if (hci_stack->gap_classic_accept_callback != NULL){ 2789 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2790 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2791 bd_addr_copy(hci_stack->decline_addr, addr); 2792 break; 2793 } 2794 } 2795 2796 // TODO: eval COD 8-10 2797 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2798 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2799 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2800 if (!conn) { 2801 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2802 } 2803 if (!conn) { 2804 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2805 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2806 bd_addr_copy(hci_stack->decline_addr, addr); 2807 hci_run(); 2808 // avoid event to higher layer 2809 return; 2810 } 2811 conn->role = HCI_ROLE_SLAVE; 2812 conn->state = RECEIVED_CONNECTION_REQUEST; 2813 // store info about eSCO 2814 if (link_type == HCI_LINK_TYPE_ESCO){ 2815 conn->remote_supported_features[0] |= 1; 2816 } 2817 hci_run(); 2818 break; 2819 2820 case HCI_EVENT_CONNECTION_COMPLETE: 2821 // Connection management 2822 reverse_bd_addr(&packet[5], addr); 2823 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2824 addr_type = BD_ADDR_TYPE_ACL; 2825 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2826 if (conn) { 2827 if (!packet[2]){ 2828 conn->state = OPEN; 2829 conn->con_handle = little_endian_read_16(packet, 3); 2830 2831 // queue set supervision timeout if we're master 2832 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2833 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2834 } 2835 2836 // restart timer 2837 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2838 btstack_run_loop_add_timer(&conn->timeout); 2839 2840 // trigger remote features for dedicated bonding 2841 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2842 hci_trigger_remote_features_for_connection(conn); 2843 } 2844 2845 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2846 2847 hci_emit_nr_connections_changed(); 2848 } else { 2849 // connection failed 2850 hci_handle_connection_failed(conn, packet[2]); 2851 } 2852 } 2853 break; 2854 2855 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2856 reverse_bd_addr(&packet[5], addr); 2857 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2858 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2859 if (packet[2]){ 2860 // connection failed 2861 if (conn){ 2862 hci_handle_connection_failed(conn, packet[2]); 2863 } 2864 break; 2865 } 2866 if (!conn) { 2867 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2868 } 2869 if (!conn) { 2870 break; 2871 } 2872 conn->state = OPEN; 2873 conn->con_handle = little_endian_read_16(packet, 3); 2874 2875 #ifdef ENABLE_SCO_OVER_HCI 2876 // update SCO 2877 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2878 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2879 } 2880 // trigger can send now 2881 if (hci_have_usb_transport()){ 2882 hci_stack->sco_can_send_now = true; 2883 } 2884 #endif 2885 #ifdef HAVE_SCO_TRANSPORT 2886 // configure sco transport 2887 if (hci_stack->sco_transport != NULL){ 2888 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2889 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2890 } 2891 #endif 2892 break; 2893 2894 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2895 handle = little_endian_read_16(packet, 3); 2896 conn = hci_connection_for_handle(handle); 2897 if (!conn) break; 2898 if (!packet[2]){ 2899 const uint8_t * features = &packet[5]; 2900 hci_handle_remote_features_page_0(conn, features); 2901 2902 // read extended features if possible 2903 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 2904 && ((conn->remote_supported_features[0] & 2) != 0)) { 2905 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2906 break; 2907 } 2908 } 2909 hci_handle_remote_features_received(conn); 2910 break; 2911 2912 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2913 handle = little_endian_read_16(packet, 3); 2914 conn = hci_connection_for_handle(handle); 2915 if (!conn) break; 2916 // status = ok, page = 1 2917 if (!packet[2]) { 2918 uint8_t page_number = packet[5]; 2919 uint8_t maximum_page_number = packet[6]; 2920 const uint8_t * features = &packet[7]; 2921 bool done = false; 2922 switch (page_number){ 2923 case 1: 2924 hci_handle_remote_features_page_1(conn, features); 2925 if (maximum_page_number >= 2){ 2926 // get Secure Connections (Controller) from Page 2 if available 2927 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2928 } else { 2929 // otherwise, assume SC (Controller) == SC (Host) 2930 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2931 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2932 } 2933 done = true; 2934 } 2935 break; 2936 case 2: 2937 hci_handle_remote_features_page_2(conn, features); 2938 done = true; 2939 break; 2940 default: 2941 break; 2942 } 2943 if (!done) break; 2944 } 2945 hci_handle_remote_features_received(conn); 2946 break; 2947 2948 case HCI_EVENT_LINK_KEY_REQUEST: 2949 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2950 hci_event_link_key_request_get_bd_addr(packet, addr); 2951 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2952 if (!conn) break; 2953 2954 // lookup link key in db if not cached 2955 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2956 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2957 } 2958 2959 // response sent by hci_run() 2960 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2961 #endif 2962 break; 2963 2964 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2965 hci_event_link_key_request_get_bd_addr(packet, addr); 2966 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2967 if (!conn) break; 2968 2969 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2970 2971 // CVE-2020-26555: ignore NULL link key 2972 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2973 if (btstack_is_null(&packet[8], 16)) break; 2974 2975 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2976 // Change Connection Encryption keeps link key type 2977 if (link_key_type != CHANGED_COMBINATION_KEY){ 2978 conn->link_key_type = link_key_type; 2979 } 2980 2981 // cache link key. link keys stored in little-endian format for legacy reasons 2982 memcpy(&conn->link_key, &packet[8], 16); 2983 2984 // only store link key: 2985 // - if bondable enabled 2986 if (hci_stack->bondable == false) break; 2987 // - if security level sufficient 2988 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2989 // - for SSP, also check if remote side requested bonding as well 2990 if (conn->link_key_type != COMBINATION_KEY){ 2991 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2992 if (!remote_bonding){ 2993 break; 2994 } 2995 } 2996 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2997 break; 2998 } 2999 3000 case HCI_EVENT_PIN_CODE_REQUEST: 3001 hci_event_pin_code_request_get_bd_addr(packet, addr); 3002 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3003 if (!conn) break; 3004 3005 hci_pairing_started(conn, false); 3006 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3007 if (!hci_stack->bondable ){ 3008 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3009 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3010 hci_run(); 3011 return; 3012 } 3013 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3014 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3015 log_info("Level 4 required, but SC not supported -> abort"); 3016 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3017 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3018 hci_run(); 3019 return; 3020 } 3021 break; 3022 3023 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3024 hci_event_io_capability_response_get_bd_addr(packet, addr); 3025 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3026 if (!conn) break; 3027 3028 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3029 hci_pairing_started(conn, true); 3030 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3031 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3032 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3033 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3034 #endif 3035 break; 3036 3037 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3038 hci_event_io_capability_response_get_bd_addr(packet, addr); 3039 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3040 if (!conn) break; 3041 3042 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3043 hci_connection_timestamp(conn); 3044 hci_pairing_started(conn, true); 3045 break; 3046 3047 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3048 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3049 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3050 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3051 if (!conn) break; 3052 3053 hci_connection_timestamp(conn); 3054 3055 hci_pairing_started(conn, true); 3056 3057 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3058 break; 3059 #endif 3060 3061 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3062 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3063 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3064 if (!conn) break; 3065 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3066 if (hci_stack->ssp_auto_accept){ 3067 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3068 }; 3069 } else { 3070 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3071 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3072 // don't forward event to app 3073 hci_run(); 3074 return; 3075 } 3076 break; 3077 3078 case HCI_EVENT_USER_PASSKEY_REQUEST: 3079 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3080 if (hci_stack->ssp_auto_accept){ 3081 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3082 }; 3083 break; 3084 3085 case HCI_EVENT_MODE_CHANGE: 3086 handle = hci_event_mode_change_get_handle(packet); 3087 conn = hci_connection_for_handle(handle); 3088 if (!conn) break; 3089 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3090 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3091 break; 3092 #endif 3093 3094 case HCI_EVENT_ENCRYPTION_CHANGE: 3095 handle = hci_event_encryption_change_get_connection_handle(packet); 3096 conn = hci_connection_for_handle(handle); 3097 if (!conn) break; 3098 if (hci_event_encryption_change_get_status(packet) == 0u) { 3099 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3100 if (encryption_enabled){ 3101 if (hci_is_le_connection(conn)){ 3102 // For LE, we accept connection as encrypted 3103 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3104 } 3105 #ifdef ENABLE_CLASSIC 3106 else { 3107 3108 // dedicated bonding: send result and disconnect 3109 if (conn->bonding_flags & BONDING_DEDICATED){ 3110 conn->bonding_flags &= ~BONDING_DEDICATED; 3111 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3112 conn->bonding_status = packet[2]; 3113 break; 3114 } 3115 3116 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3117 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3118 bool connected_uses_aes_ccm = encryption_enabled == 2; 3119 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3120 log_info("SC during pairing, but only E0 now -> abort"); 3121 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3122 break; 3123 } 3124 3125 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3126 if (connected_uses_aes_ccm){ 3127 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3128 } 3129 3130 #ifdef ENABLE_TESTING_SUPPORT 3131 // work around for issue with PTS dongle 3132 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3133 #endif 3134 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3135 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3136 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3137 } else { 3138 // if not, pretend everything is perfect 3139 hci_handle_read_encryption_key_size_complete(conn, 16); 3140 } 3141 } 3142 #endif 3143 } else { 3144 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3145 } 3146 } 3147 3148 break; 3149 3150 #ifdef ENABLE_CLASSIC 3151 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3152 handle = hci_event_authentication_complete_get_connection_handle(packet); 3153 conn = hci_connection_for_handle(handle); 3154 if (!conn) break; 3155 3156 // clear authentication active flag 3157 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3158 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3159 3160 // authenticated only if auth status == 0 3161 if (hci_event_authentication_complete_get_status(packet) == 0){ 3162 // authenticated 3163 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3164 3165 // If not already encrypted, start encryption 3166 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3167 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3168 break; 3169 } 3170 } 3171 3172 // emit updated security level 3173 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3174 break; 3175 3176 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3177 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3178 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3179 if (!conn) break; 3180 3181 // treat successfully paired connection as authenticated 3182 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3183 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3184 } 3185 3186 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3187 break; 3188 #endif 3189 3190 // HCI_EVENT_DISCONNECTION_COMPLETE 3191 // has been split, to first notify stack before shutting connection down 3192 // see end of function, too. 3193 case HCI_EVENT_DISCONNECTION_COMPLETE: 3194 if (packet[2]) break; // status != 0 3195 handle = little_endian_read_16(packet, 3); 3196 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3197 if (hci_stack->acl_fragmentation_total_size > 0u) { 3198 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3199 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3200 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3201 hci_stack->acl_fragmentation_total_size = 0; 3202 hci_stack->acl_fragmentation_pos = 0; 3203 if (release_buffer){ 3204 hci_release_packet_buffer(); 3205 } 3206 } 3207 } 3208 3209 conn = hci_connection_for_handle(handle); 3210 if (!conn) break; 3211 #ifdef ENABLE_CLASSIC 3212 // pairing failed if it was ongoing 3213 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3214 #endif 3215 3216 // emit dedicatd bonding event 3217 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3218 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3219 } 3220 3221 // mark connection for shutdown, stop timers, reset state 3222 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3223 hci_connection_stop_timer(conn); 3224 hci_connection_init(conn); 3225 3226 #ifdef ENABLE_BLE 3227 #ifdef ENABLE_LE_PERIPHERAL 3228 // re-enable advertisements for le connections if active 3229 if (hci_is_le_connection(conn)){ 3230 hci_update_advertisements_enabled_for_current_roles(); 3231 } 3232 #endif 3233 #endif 3234 break; 3235 3236 case HCI_EVENT_HARDWARE_ERROR: 3237 log_error("Hardware Error: 0x%02x", packet[2]); 3238 if (hci_stack->hardware_error_callback){ 3239 (*hci_stack->hardware_error_callback)(packet[2]); 3240 } else { 3241 // if no special requests, just reboot stack 3242 hci_power_control_off(); 3243 hci_power_control_on(); 3244 } 3245 break; 3246 3247 #ifdef ENABLE_CLASSIC 3248 case HCI_EVENT_ROLE_CHANGE: 3249 if (packet[2]) break; // status != 0 3250 reverse_bd_addr(&packet[3], addr); 3251 addr_type = BD_ADDR_TYPE_ACL; 3252 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3253 if (!conn) break; 3254 conn->role = packet[9]; 3255 break; 3256 #endif 3257 3258 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3259 // release packet buffer only for asynchronous transport and if there are not further fragements 3260 if (hci_transport_synchronous()) { 3261 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3262 return; // instead of break: to avoid re-entering hci_run() 3263 } 3264 hci_stack->acl_fragmentation_tx_active = 0; 3265 if (hci_stack->acl_fragmentation_total_size) break; 3266 hci_release_packet_buffer(); 3267 3268 // L2CAP receives this event via the hci_emit_event below 3269 3270 #ifdef ENABLE_CLASSIC 3271 // For SCO, we do the can_send_now_check here 3272 hci_notify_if_sco_can_send_now(); 3273 #endif 3274 break; 3275 3276 #ifdef ENABLE_CLASSIC 3277 case HCI_EVENT_SCO_CAN_SEND_NOW: 3278 // For SCO, we do the can_send_now_check here 3279 hci_stack->sco_can_send_now = true; 3280 hci_notify_if_sco_can_send_now(); 3281 return; 3282 3283 // explode inquriy results for easier consumption 3284 case HCI_EVENT_INQUIRY_RESULT: 3285 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3286 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3287 gap_inquiry_explode(packet, size); 3288 break; 3289 #endif 3290 3291 #ifdef ENABLE_BLE 3292 case HCI_EVENT_LE_META: 3293 switch (packet[2]){ 3294 #ifdef ENABLE_LE_CENTRAL 3295 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3296 // log_info("advertising report received"); 3297 if (!hci_stack->le_scanning_enabled) break; 3298 le_handle_advertisement_report(packet, size); 3299 break; 3300 #endif 3301 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3302 event_handle_le_connection_complete(packet); 3303 break; 3304 3305 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3306 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3307 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3308 conn = hci_connection_for_handle(handle); 3309 if (!conn) break; 3310 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3311 break; 3312 3313 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3314 // connection 3315 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3316 conn = hci_connection_for_handle(handle); 3317 if (conn) { 3318 // read arguments 3319 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3320 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3321 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3322 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3323 3324 // validate against current connection parameter range 3325 le_connection_parameter_range_t existing_range; 3326 gap_get_connection_parameter_range(&existing_range); 3327 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3328 if (update_parameter){ 3329 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3330 conn->le_conn_interval_min = le_conn_interval_min; 3331 conn->le_conn_interval_max = le_conn_interval_max; 3332 conn->le_conn_latency = le_conn_latency; 3333 conn->le_supervision_timeout = le_supervision_timeout; 3334 } else { 3335 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3336 } 3337 } 3338 break; 3339 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3340 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3341 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3342 conn = hci_connection_for_handle(handle); 3343 if (conn) { 3344 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3345 } 3346 break; 3347 #endif 3348 default: 3349 break; 3350 } 3351 break; 3352 #endif 3353 case HCI_EVENT_VENDOR_SPECIFIC: 3354 // Vendor specific commands often create vendor specific event instead of num completed packets 3355 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3356 switch (hci_stack->manufacturer){ 3357 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3358 hci_stack->num_cmd_packets = 1; 3359 break; 3360 default: 3361 break; 3362 } 3363 break; 3364 default: 3365 break; 3366 } 3367 3368 handle_event_for_current_stack_state(packet, size); 3369 3370 // notify upper stack 3371 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3372 3373 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3374 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3375 handle = little_endian_read_16(packet, 3); 3376 hci_connection_t * aConn = hci_connection_for_handle(handle); 3377 // discard connection if app did not trigger a reconnect in the event handler 3378 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3379 hci_shutdown_connection(aConn); 3380 } 3381 } 3382 3383 // execute main loop 3384 hci_run(); 3385 } 3386 3387 #ifdef ENABLE_CLASSIC 3388 3389 #ifdef ENABLE_SCO_OVER_HCI 3390 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3391 static void sco_schedule_tx(hci_connection_t * conn); 3392 3393 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3394 log_debug("SCO TX Timeout"); 3395 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3396 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3397 if (!conn) return; 3398 3399 // trigger send 3400 conn->sco_tx_ready = 1; 3401 // extra packet if CVSD but SCO buffer is too short 3402 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3403 conn->sco_tx_ready++; 3404 } 3405 hci_notify_if_sco_can_send_now(); 3406 } 3407 3408 3409 #define SCO_TX_AFTER_RX_MS (6) 3410 3411 static void sco_schedule_tx(hci_connection_t * conn){ 3412 3413 uint32_t now = btstack_run_loop_get_time_ms(); 3414 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3415 int time_delta_ms = sco_tx_ms - now; 3416 3417 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3418 3419 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3420 btstack_run_loop_remove_timer(timer); 3421 btstack_run_loop_set_timer(timer, time_delta_ms); 3422 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3423 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3424 btstack_run_loop_add_timer(timer); 3425 } 3426 #endif 3427 3428 static void sco_handler(uint8_t * packet, uint16_t size){ 3429 // lookup connection struct 3430 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3431 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3432 if (!conn) return; 3433 3434 #ifdef ENABLE_SCO_OVER_HCI 3435 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3436 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3437 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3438 packet[2] = 0x3c; 3439 memmove(&packet[3], &packet[23], 63); 3440 size = 63; 3441 } 3442 } 3443 3444 if (hci_have_usb_transport()){ 3445 // Nothing to do 3446 } else { 3447 // 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); 3448 if (hci_stack->synchronous_flow_control_enabled == 0){ 3449 uint32_t now = btstack_run_loop_get_time_ms(); 3450 3451 if (!conn->sco_rx_valid){ 3452 // ignore first 10 packets 3453 conn->sco_rx_count++; 3454 // log_debug("sco rx count %u", conn->sco_rx_count); 3455 if (conn->sco_rx_count == 10) { 3456 // use first timestamp as is and pretent it just started 3457 conn->sco_rx_ms = now; 3458 conn->sco_rx_valid = 1; 3459 conn->sco_rx_count = 0; 3460 sco_schedule_tx(conn); 3461 } 3462 } else { 3463 // track expected arrival timme 3464 conn->sco_rx_count++; 3465 conn->sco_rx_ms += 7; 3466 int delta = (int32_t) (now - conn->sco_rx_ms); 3467 if (delta > 0){ 3468 conn->sco_rx_ms++; 3469 } 3470 // log_debug("sco rx %u", conn->sco_rx_ms); 3471 sco_schedule_tx(conn); 3472 } 3473 } 3474 } 3475 #endif 3476 3477 // deliver to app 3478 if (hci_stack->sco_packet_handler) { 3479 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3480 } 3481 3482 #ifdef HAVE_SCO_TRANSPORT 3483 // We can send one packet for each received packet 3484 conn->sco_tx_ready++; 3485 hci_notify_if_sco_can_send_now(); 3486 #endif 3487 3488 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3489 conn->num_packets_completed++; 3490 hci_stack->host_completed_packets = 1; 3491 hci_run(); 3492 #endif 3493 } 3494 #endif 3495 3496 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3497 hci_dump_packet(packet_type, 1, packet, size); 3498 switch (packet_type) { 3499 case HCI_EVENT_PACKET: 3500 event_handler(packet, size); 3501 break; 3502 case HCI_ACL_DATA_PACKET: 3503 acl_handler(packet, size); 3504 break; 3505 #ifdef ENABLE_CLASSIC 3506 case HCI_SCO_DATA_PACKET: 3507 sco_handler(packet, size); 3508 break; 3509 #endif 3510 default: 3511 break; 3512 } 3513 } 3514 3515 /** 3516 * @brief Add event packet handler. 3517 */ 3518 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3519 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3520 } 3521 3522 /** 3523 * @brief Remove event packet handler. 3524 */ 3525 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3526 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3527 } 3528 3529 /** Register HCI packet handlers */ 3530 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3531 hci_stack->acl_packet_handler = handler; 3532 } 3533 3534 #ifdef ENABLE_CLASSIC 3535 /** 3536 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3537 */ 3538 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3539 hci_stack->sco_packet_handler = handler; 3540 } 3541 #endif 3542 3543 static void hci_state_reset(void){ 3544 // no connections yet 3545 hci_stack->connections = NULL; 3546 3547 // keep discoverable/connectable as this has been requested by the client(s) 3548 // hci_stack->discoverable = 0; 3549 // hci_stack->connectable = 0; 3550 // hci_stack->bondable = 1; 3551 // hci_stack->own_addr_type = 0; 3552 3553 // buffer is free 3554 hci_stack->hci_packet_buffer_reserved = false; 3555 3556 // no pending cmds 3557 hci_stack->decline_reason = 0; 3558 3559 hci_stack->secure_connections_active = false; 3560 3561 #ifdef ENABLE_CLASSIC 3562 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3563 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3564 3565 hci_stack->gap_tasks_classic = 3566 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3567 GAP_TASK_SET_CLASS_OF_DEVICE | 3568 GAP_TASK_SET_LOCAL_NAME | 3569 GAP_TASK_SET_EIR_DATA | 3570 GAP_TASK_WRITE_SCAN_ENABLE | 3571 GAP_TASK_WRITE_PAGE_TIMEOUT; 3572 #endif 3573 3574 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3575 hci_stack->classic_read_local_oob_data = false; 3576 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3577 #endif 3578 3579 // LE 3580 #ifdef ENABLE_BLE 3581 memset(hci_stack->le_random_address, 0, 6); 3582 hci_stack->le_random_address_set = 0; 3583 #endif 3584 #ifdef ENABLE_LE_CENTRAL 3585 hci_stack->le_scanning_active = false; 3586 hci_stack->le_scanning_param_update = true; 3587 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3588 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3589 hci_stack->le_whitelist_capacity = 0; 3590 #endif 3591 #ifdef ENABLE_LE_PERIPHERAL 3592 hci_stack->le_advertisements_active = false; 3593 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3594 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3595 } 3596 if (hci_stack->le_advertisements_data != NULL){ 3597 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3598 } 3599 #endif 3600 } 3601 3602 #ifdef ENABLE_CLASSIC 3603 /** 3604 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3605 */ 3606 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3607 // store and open remote device db 3608 hci_stack->link_key_db = link_key_db; 3609 if (hci_stack->link_key_db) { 3610 hci_stack->link_key_db->open(); 3611 } 3612 } 3613 #endif 3614 3615 void hci_init(const hci_transport_t *transport, const void *config){ 3616 3617 #ifdef HAVE_MALLOC 3618 if (!hci_stack) { 3619 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3620 } 3621 #else 3622 hci_stack = &hci_stack_static; 3623 #endif 3624 memset(hci_stack, 0, sizeof(hci_stack_t)); 3625 3626 // reference to use transport layer implementation 3627 hci_stack->hci_transport = transport; 3628 3629 // reference to used config 3630 hci_stack->config = config; 3631 3632 // setup pointer for outgoing packet buffer 3633 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3634 3635 // max acl payload size defined in config.h 3636 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3637 3638 // register packet handlers with transport 3639 transport->register_packet_handler(&packet_handler); 3640 3641 hci_stack->state = HCI_STATE_OFF; 3642 3643 // class of device 3644 hci_stack->class_of_device = 0x007a020c; // Smartphone 3645 3646 // bondable by default 3647 hci_stack->bondable = 1; 3648 3649 #ifdef ENABLE_CLASSIC 3650 // classic name 3651 hci_stack->local_name = default_classic_name; 3652 3653 // Master slave policy 3654 hci_stack->master_slave_policy = 1; 3655 3656 // Allow Role Switch 3657 hci_stack->allow_role_switch = 1; 3658 3659 // Default / minimum security level = 2 3660 hci_stack->gap_security_level = LEVEL_2; 3661 3662 // Default Security Mode 4 3663 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3664 3665 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3666 hci_stack->gap_required_encyrption_key_size = 7; 3667 3668 // Link Supervision Timeout 3669 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3670 3671 #endif 3672 3673 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3674 hci_stack->ssp_enable = 1; 3675 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3676 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3677 hci_stack->ssp_auto_accept = 1; 3678 3679 // Secure Connections: enable (requires support from Controller) 3680 hci_stack->secure_connections_enable = true; 3681 3682 // voice setting - signed 16 bit pcm data with CVSD over the air 3683 hci_stack->sco_voice_setting = 0x60; 3684 3685 #ifdef ENABLE_LE_CENTRAL 3686 // connection parameter to use for outgoing connections 3687 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3688 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3689 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3690 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3691 hci_stack->le_connection_latency = 4; // 4 3692 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3693 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3694 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3695 3696 // default LE Scanning 3697 hci_stack->le_scan_type = 0x1; // active 3698 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3699 hci_stack->le_scan_window = 0x30; // 30 ms 3700 #endif 3701 3702 #ifdef ENABLE_LE_PERIPHERAL 3703 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3704 #endif 3705 3706 // connection parameter range used to answer connection parameter update requests in l2cap 3707 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3708 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3709 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3710 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3711 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3712 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3713 3714 hci_state_reset(); 3715 } 3716 3717 void hci_deinit(void){ 3718 #ifdef HAVE_MALLOC 3719 if (hci_stack) { 3720 free(hci_stack); 3721 } 3722 #endif 3723 hci_stack = NULL; 3724 3725 #ifdef ENABLE_CLASSIC 3726 disable_l2cap_timeouts = 0; 3727 #endif 3728 } 3729 3730 /** 3731 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3732 */ 3733 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3734 hci_stack->chipset = chipset_driver; 3735 3736 // reset chipset driver - init is also called on power_up 3737 if (hci_stack->chipset && hci_stack->chipset->init){ 3738 hci_stack->chipset->init(hci_stack->config); 3739 } 3740 } 3741 3742 /** 3743 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3744 */ 3745 void hci_set_control(const btstack_control_t *hardware_control){ 3746 // references to used control implementation 3747 hci_stack->control = hardware_control; 3748 // init with transport config 3749 hardware_control->init(hci_stack->config); 3750 } 3751 3752 static void hci_discard_connections(void){ 3753 btstack_linked_list_iterator_t lit; 3754 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3755 while (btstack_linked_list_iterator_has_next(&lit)){ 3756 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3757 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3758 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3759 hci_shutdown_connection(connection); 3760 } 3761 } 3762 3763 void hci_close(void){ 3764 3765 #ifdef ENABLE_CLASSIC 3766 // close remote device db 3767 if (hci_stack->link_key_db) { 3768 hci_stack->link_key_db->close(); 3769 } 3770 #endif 3771 3772 hci_discard_connections(); 3773 3774 hci_power_control(HCI_POWER_OFF); 3775 3776 #ifdef HAVE_MALLOC 3777 free(hci_stack); 3778 #endif 3779 hci_stack = NULL; 3780 } 3781 3782 #ifdef HAVE_SCO_TRANSPORT 3783 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3784 hci_stack->sco_transport = sco_transport; 3785 sco_transport->register_packet_handler(&packet_handler); 3786 } 3787 #endif 3788 3789 #ifdef ENABLE_CLASSIC 3790 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3791 // validate ranage and set 3792 if (encryption_key_size < 7) return; 3793 if (encryption_key_size > 16) return; 3794 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3795 } 3796 3797 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3798 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3799 hci_stack->gap_security_mode = security_mode; 3800 return ERROR_CODE_SUCCESS; 3801 } else { 3802 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3803 } 3804 } 3805 3806 gap_security_mode_t gap_get_security_mode(void){ 3807 return hci_stack->gap_security_mode; 3808 } 3809 3810 void gap_set_security_level(gap_security_level_t security_level){ 3811 hci_stack->gap_security_level = security_level; 3812 } 3813 3814 gap_security_level_t gap_get_security_level(void){ 3815 if (hci_stack->gap_secure_connections_only_mode){ 3816 return LEVEL_4; 3817 } 3818 return hci_stack->gap_security_level; 3819 } 3820 3821 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3822 hci_stack->gap_minimal_service_security_level = security_level; 3823 } 3824 3825 void gap_set_secure_connections_only_mode(bool enable){ 3826 hci_stack->gap_secure_connections_only_mode = enable; 3827 } 3828 3829 bool gap_get_secure_connections_only_mode(void){ 3830 return hci_stack->gap_secure_connections_only_mode; 3831 } 3832 #endif 3833 3834 #ifdef ENABLE_CLASSIC 3835 void gap_set_class_of_device(uint32_t class_of_device){ 3836 hci_stack->class_of_device = class_of_device; 3837 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3838 hci_run(); 3839 } 3840 3841 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3842 hci_stack->default_link_policy_settings = default_link_policy_settings; 3843 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3844 hci_run(); 3845 } 3846 3847 void gap_set_allow_role_switch(bool allow_role_switch){ 3848 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3849 } 3850 3851 uint8_t hci_get_allow_role_switch(void){ 3852 return hci_stack->allow_role_switch; 3853 } 3854 3855 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3856 hci_stack->link_supervision_timeout = link_supervision_timeout; 3857 } 3858 3859 void hci_disable_l2cap_timeout_check(void){ 3860 disable_l2cap_timeouts = 1; 3861 } 3862 #endif 3863 3864 #ifndef HAVE_HOST_CONTROLLER_API 3865 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3866 void hci_set_bd_addr(bd_addr_t addr){ 3867 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3868 hci_stack->custom_bd_addr_set = 1; 3869 } 3870 #endif 3871 3872 // State-Module-Driver overview 3873 // state module low-level 3874 // HCI_STATE_OFF off close 3875 // HCI_STATE_INITIALIZING, on open 3876 // HCI_STATE_WORKING, on open 3877 // HCI_STATE_HALTING, on open 3878 // HCI_STATE_SLEEPING, off/sleep close 3879 // HCI_STATE_FALLING_ASLEEP on open 3880 3881 static int hci_power_control_on(void){ 3882 3883 // power on 3884 int err = 0; 3885 if (hci_stack->control && hci_stack->control->on){ 3886 err = (*hci_stack->control->on)(); 3887 } 3888 if (err){ 3889 log_error( "POWER_ON failed"); 3890 hci_emit_hci_open_failed(); 3891 return err; 3892 } 3893 3894 // int chipset driver 3895 if (hci_stack->chipset && hci_stack->chipset->init){ 3896 hci_stack->chipset->init(hci_stack->config); 3897 } 3898 3899 // init transport 3900 if (hci_stack->hci_transport->init){ 3901 hci_stack->hci_transport->init(hci_stack->config); 3902 } 3903 3904 // open transport 3905 err = hci_stack->hci_transport->open(); 3906 if (err){ 3907 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3908 if (hci_stack->control && hci_stack->control->off){ 3909 (*hci_stack->control->off)(); 3910 } 3911 hci_emit_hci_open_failed(); 3912 return err; 3913 } 3914 return 0; 3915 } 3916 3917 static void hci_power_control_off(void){ 3918 3919 log_info("hci_power_control_off"); 3920 3921 // close low-level device 3922 hci_stack->hci_transport->close(); 3923 3924 log_info("hci_power_control_off - hci_transport closed"); 3925 3926 // power off 3927 if (hci_stack->control && hci_stack->control->off){ 3928 (*hci_stack->control->off)(); 3929 } 3930 3931 log_info("hci_power_control_off - control closed"); 3932 3933 hci_stack->state = HCI_STATE_OFF; 3934 } 3935 3936 static void hci_power_control_sleep(void){ 3937 3938 log_info("hci_power_control_sleep"); 3939 3940 #if 0 3941 // don't close serial port during sleep 3942 3943 // close low-level device 3944 hci_stack->hci_transport->close(hci_stack->config); 3945 #endif 3946 3947 // sleep mode 3948 if (hci_stack->control && hci_stack->control->sleep){ 3949 (*hci_stack->control->sleep)(); 3950 } 3951 3952 hci_stack->state = HCI_STATE_SLEEPING; 3953 } 3954 3955 static int hci_power_control_wake(void){ 3956 3957 log_info("hci_power_control_wake"); 3958 3959 // wake on 3960 if (hci_stack->control && hci_stack->control->wake){ 3961 (*hci_stack->control->wake)(); 3962 } 3963 3964 #if 0 3965 // open low-level device 3966 int err = hci_stack->hci_transport->open(hci_stack->config); 3967 if (err){ 3968 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3969 if (hci_stack->control && hci_stack->control->off){ 3970 (*hci_stack->control->off)(); 3971 } 3972 hci_emit_hci_open_failed(); 3973 return err; 3974 } 3975 #endif 3976 3977 return 0; 3978 } 3979 3980 static void hci_power_transition_to_initializing(void){ 3981 // set up state machine 3982 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3983 hci_stack->hci_packet_buffer_reserved = false; 3984 hci_stack->state = HCI_STATE_INITIALIZING; 3985 hci_stack->substate = HCI_INIT_SEND_RESET; 3986 } 3987 3988 // returns error 3989 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3990 int err; 3991 switch (power_mode){ 3992 case HCI_POWER_ON: 3993 err = hci_power_control_on(); 3994 if (err != 0) { 3995 log_error("hci_power_control_on() error %d", err); 3996 return err; 3997 } 3998 hci_power_transition_to_initializing(); 3999 break; 4000 case HCI_POWER_OFF: 4001 // do nothing 4002 break; 4003 case HCI_POWER_SLEEP: 4004 // do nothing (with SLEEP == OFF) 4005 break; 4006 default: 4007 btstack_assert(false); 4008 break; 4009 } 4010 return ERROR_CODE_SUCCESS; 4011 } 4012 4013 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4014 switch (power_mode){ 4015 case HCI_POWER_ON: 4016 // do nothing 4017 break; 4018 case HCI_POWER_OFF: 4019 // no connections yet, just turn it off 4020 hci_power_control_off(); 4021 break; 4022 case HCI_POWER_SLEEP: 4023 // no connections yet, just turn it off 4024 hci_power_control_sleep(); 4025 break; 4026 default: 4027 btstack_assert(false); 4028 break; 4029 } 4030 return ERROR_CODE_SUCCESS; 4031 } 4032 4033 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4034 switch (power_mode){ 4035 case HCI_POWER_ON: 4036 // do nothing 4037 break; 4038 case HCI_POWER_OFF: 4039 // see hci_run 4040 hci_stack->state = HCI_STATE_HALTING; 4041 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4042 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4043 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4044 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4045 btstack_run_loop_add_timer(&hci_stack->timeout); 4046 break; 4047 case HCI_POWER_SLEEP: 4048 // see hci_run 4049 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4050 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4051 break; 4052 default: 4053 btstack_assert(false); 4054 break; 4055 } 4056 return ERROR_CODE_SUCCESS; 4057 } 4058 4059 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4060 switch (power_mode){ 4061 case HCI_POWER_ON: 4062 hci_power_transition_to_initializing(); 4063 break; 4064 case HCI_POWER_OFF: 4065 // do nothing 4066 break; 4067 case HCI_POWER_SLEEP: 4068 // see hci_run 4069 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4070 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4071 break; 4072 default: 4073 btstack_assert(false); 4074 break; 4075 } 4076 return ERROR_CODE_SUCCESS; 4077 } 4078 4079 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4080 switch (power_mode){ 4081 case HCI_POWER_ON: 4082 hci_power_transition_to_initializing(); 4083 break; 4084 case HCI_POWER_OFF: 4085 // see hci_run 4086 hci_stack->state = HCI_STATE_HALTING; 4087 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4088 break; 4089 case HCI_POWER_SLEEP: 4090 // do nothing 4091 break; 4092 default: 4093 btstack_assert(false); 4094 break; 4095 } 4096 return ERROR_CODE_SUCCESS; 4097 } 4098 4099 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4100 int err; 4101 switch (power_mode){ 4102 case HCI_POWER_ON: 4103 err = hci_power_control_wake(); 4104 if (err) return err; 4105 hci_power_transition_to_initializing(); 4106 break; 4107 case HCI_POWER_OFF: 4108 hci_stack->state = HCI_STATE_HALTING; 4109 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4110 break; 4111 case HCI_POWER_SLEEP: 4112 // do nothing 4113 break; 4114 default: 4115 btstack_assert(false); 4116 break; 4117 } 4118 return ERROR_CODE_SUCCESS; 4119 } 4120 4121 int hci_power_control(HCI_POWER_MODE power_mode){ 4122 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4123 int err = 0; 4124 switch (hci_stack->state){ 4125 case HCI_STATE_OFF: 4126 err = hci_power_control_state_off(power_mode); 4127 break; 4128 case HCI_STATE_INITIALIZING: 4129 err = hci_power_control_state_initializing(power_mode); 4130 break; 4131 case HCI_STATE_WORKING: 4132 err = hci_power_control_state_working(power_mode); 4133 break; 4134 case HCI_STATE_HALTING: 4135 err = hci_power_control_state_halting(power_mode); 4136 break; 4137 case HCI_STATE_FALLING_ASLEEP: 4138 err = hci_power_control_state_falling_asleep(power_mode); 4139 break; 4140 case HCI_STATE_SLEEPING: 4141 err = hci_power_control_state_sleeping(power_mode); 4142 break; 4143 default: 4144 btstack_assert(false); 4145 break; 4146 } 4147 if (err != 0){ 4148 return err; 4149 } 4150 4151 // create internal event 4152 hci_emit_state(); 4153 4154 // trigger next/first action 4155 hci_run(); 4156 4157 return 0; 4158 } 4159 4160 4161 static void hci_halting_run(void) { 4162 4163 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4164 4165 hci_connection_t *connection; 4166 4167 switch (hci_stack->substate) { 4168 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4169 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4170 4171 #ifdef ENABLE_BLE 4172 #ifdef ENABLE_LE_CENTRAL 4173 hci_whitelist_free(); 4174 #endif 4175 #endif 4176 // close all open connections 4177 connection = (hci_connection_t *) hci_stack->connections; 4178 if (connection) { 4179 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4180 if (!hci_can_send_command_packet_now()) return; 4181 4182 // check state 4183 if (connection->state == SENT_DISCONNECT) return; 4184 connection->state = SENT_DISCONNECT; 4185 4186 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4187 4188 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4189 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4190 4191 // ... which would be ignored anyway as we shutdown (free) the connection now 4192 hci_shutdown_connection(connection); 4193 4194 // finally, send the disconnect command 4195 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4196 return; 4197 } 4198 4199 btstack_run_loop_remove_timer(&hci_stack->timeout); 4200 4201 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4202 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4203 log_info("HCI_STATE_HALTING: wait 50 ms"); 4204 hci_stack->substate = HCI_HALTING_W4_TIMER; 4205 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4206 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4207 btstack_run_loop_add_timer(&hci_stack->timeout); 4208 break; 4209 } 4210 4211 /* fall through */ 4212 4213 case HCI_HALTING_CLOSE: 4214 // close left over connections (that had not been properly closed before) 4215 hci_discard_connections(); 4216 4217 log_info("HCI_STATE_HALTING, calling off"); 4218 4219 // switch mode 4220 hci_power_control_off(); 4221 4222 log_info("HCI_STATE_HALTING, emitting state"); 4223 hci_emit_state(); 4224 log_info("HCI_STATE_HALTING, done"); 4225 break; 4226 4227 case HCI_HALTING_W4_TIMER: 4228 // keep waiting 4229 4230 break; 4231 default: 4232 break; 4233 } 4234 }; 4235 4236 static void hci_falling_asleep_run(void){ 4237 hci_connection_t * connection; 4238 switch(hci_stack->substate) { 4239 case HCI_FALLING_ASLEEP_DISCONNECT: 4240 log_info("HCI_STATE_FALLING_ASLEEP"); 4241 // close all open connections 4242 connection = (hci_connection_t *) hci_stack->connections; 4243 if (connection){ 4244 4245 // send disconnect 4246 if (!hci_can_send_command_packet_now()) return; 4247 4248 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4249 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4250 4251 // send disconnected event right away - causes higher layer connections to get closed, too. 4252 hci_shutdown_connection(connection); 4253 return; 4254 } 4255 4256 if (hci_classic_supported()){ 4257 // disable page and inquiry scan 4258 if (!hci_can_send_command_packet_now()) return; 4259 4260 log_info("HCI_STATE_HALTING, disabling inq scans"); 4261 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4262 4263 // continue in next sub state 4264 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4265 break; 4266 } 4267 4268 /* fall through */ 4269 4270 case HCI_FALLING_ASLEEP_COMPLETE: 4271 log_info("HCI_STATE_HALTING, calling sleep"); 4272 // switch mode 4273 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4274 hci_emit_state(); 4275 break; 4276 4277 default: 4278 break; 4279 } 4280 } 4281 4282 #ifdef ENABLE_CLASSIC 4283 4284 static void hci_update_scan_enable(void){ 4285 // 2 = page scan, 1 = inq scan 4286 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4287 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4288 hci_run(); 4289 } 4290 4291 void gap_discoverable_control(uint8_t enable){ 4292 if (enable) enable = 1; // normalize argument 4293 4294 if (hci_stack->discoverable == enable){ 4295 hci_emit_discoverable_enabled(hci_stack->discoverable); 4296 return; 4297 } 4298 4299 hci_stack->discoverable = enable; 4300 hci_update_scan_enable(); 4301 } 4302 4303 void gap_connectable_control(uint8_t enable){ 4304 if (enable) enable = 1; // normalize argument 4305 4306 // don't emit event 4307 if (hci_stack->connectable == enable) return; 4308 4309 hci_stack->connectable = enable; 4310 hci_update_scan_enable(); 4311 } 4312 #endif 4313 4314 void gap_local_bd_addr(bd_addr_t address_buffer){ 4315 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4316 } 4317 4318 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4319 static void hci_host_num_completed_packets(void){ 4320 4321 // create packet manually as arrays are not supported and num_commands should not get reduced 4322 hci_reserve_packet_buffer(); 4323 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4324 4325 uint16_t size = 0; 4326 uint16_t num_handles = 0; 4327 packet[size++] = 0x35; 4328 packet[size++] = 0x0c; 4329 size++; // skip param len 4330 size++; // skip num handles 4331 4332 // add { handle, packets } entries 4333 btstack_linked_item_t * it; 4334 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4335 hci_connection_t * connection = (hci_connection_t *) it; 4336 if (connection->num_packets_completed){ 4337 little_endian_store_16(packet, size, connection->con_handle); 4338 size += 2; 4339 little_endian_store_16(packet, size, connection->num_packets_completed); 4340 size += 2; 4341 // 4342 num_handles++; 4343 connection->num_packets_completed = 0; 4344 } 4345 } 4346 4347 packet[2] = size - 3; 4348 packet[3] = num_handles; 4349 4350 hci_stack->host_completed_packets = 0; 4351 4352 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4353 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4354 4355 // release packet buffer for synchronous transport implementations 4356 if (hci_transport_synchronous()){ 4357 hci_release_packet_buffer(); 4358 hci_emit_transport_packet_sent(); 4359 } 4360 } 4361 #endif 4362 4363 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4364 UNUSED(ds); 4365 hci_stack->substate = HCI_HALTING_CLOSE; 4366 // allow packet handlers to defer final shutdown 4367 hci_emit_state(); 4368 hci_run(); 4369 } 4370 4371 static bool hci_run_acl_fragments(void){ 4372 if (hci_stack->acl_fragmentation_total_size > 0u) { 4373 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4374 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4375 if (connection) { 4376 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4377 hci_send_acl_packet_fragments(connection); 4378 return true; 4379 } 4380 } else { 4381 // connection gone -> discard further fragments 4382 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4383 hci_stack->acl_fragmentation_total_size = 0; 4384 hci_stack->acl_fragmentation_pos = 0; 4385 } 4386 } 4387 return false; 4388 } 4389 4390 #ifdef ENABLE_CLASSIC 4391 static bool hci_run_general_gap_classic(void){ 4392 4393 // assert stack is working and classic is active 4394 if (hci_classic_supported() == false) return false; 4395 if (hci_stack->state != HCI_STATE_WORKING) return false; 4396 4397 // decline incoming connections 4398 if (hci_stack->decline_reason){ 4399 uint8_t reason = hci_stack->decline_reason; 4400 hci_stack->decline_reason = 0; 4401 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4402 return true; 4403 } 4404 4405 if (hci_stack->gap_tasks_classic != 0){ 4406 hci_run_gap_tasks_classic(); 4407 return true; 4408 } 4409 4410 // start/stop inquiry 4411 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4412 uint8_t duration = hci_stack->inquiry_state; 4413 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4414 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4415 return true; 4416 } 4417 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4418 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4419 hci_send_cmd(&hci_inquiry_cancel); 4420 return true; 4421 } 4422 // remote name request 4423 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4424 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4425 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4426 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4427 return true; 4428 } 4429 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4430 // Local OOB data 4431 if (hci_stack->classic_read_local_oob_data){ 4432 hci_stack->classic_read_local_oob_data = false; 4433 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4434 hci_send_cmd(&hci_read_local_extended_oob_data); 4435 } else { 4436 hci_send_cmd(&hci_read_local_oob_data); 4437 } 4438 } 4439 #endif 4440 // pairing 4441 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4442 uint8_t state = hci_stack->gap_pairing_state; 4443 uint8_t pin_code[16]; 4444 switch (state){ 4445 case GAP_PAIRING_STATE_SEND_PIN: 4446 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4447 memset(pin_code, 0, 16); 4448 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4449 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4450 break; 4451 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4452 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4453 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4454 break; 4455 case GAP_PAIRING_STATE_SEND_PASSKEY: 4456 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4457 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4458 break; 4459 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4460 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4461 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4462 break; 4463 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4464 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4465 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4466 break; 4467 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4468 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4469 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4470 break; 4471 default: 4472 break; 4473 } 4474 return true; 4475 } 4476 return false; 4477 } 4478 #endif 4479 4480 #ifdef ENABLE_BLE 4481 static bool hci_run_general_gap_le(void){ 4482 4483 // Phase 1: collect what to stop 4484 4485 bool scanning_stop = false; 4486 bool connecting_stop = false; 4487 bool advertising_stop = false; 4488 4489 #ifndef ENABLE_LE_CENTRAL 4490 UNUSED(scanning_stop); 4491 UNUSED(connecting_stop); 4492 #endif 4493 #ifndef ENABLE_LE_PERIPHERAL 4494 UNUSED(advertising_stop); 4495 #endif 4496 4497 // check if own address changes 4498 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4499 4500 // check if whitelist needs modification 4501 bool whitelist_modification_pending = false; 4502 btstack_linked_list_iterator_t lit; 4503 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4504 while (btstack_linked_list_iterator_has_next(&lit)){ 4505 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4506 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4507 whitelist_modification_pending = true; 4508 break; 4509 } 4510 } 4511 // check if resolving list needs modification 4512 bool resolving_list_modification_pending = false; 4513 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4514 4515 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4516 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4517 resolving_list_modification_pending = true; 4518 } 4519 #endif 4520 4521 #ifdef ENABLE_LE_CENTRAL 4522 // scanning control 4523 if (hci_stack->le_scanning_active) { 4524 // stop if: 4525 // - parameter change required 4526 // - it's disabled 4527 // - whitelist change required but used for scanning 4528 // - resolving list modified 4529 // - own address changes 4530 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4531 if ((hci_stack->le_scanning_param_update) || 4532 !hci_stack->le_scanning_enabled || 4533 scanning_uses_whitelist || 4534 resolving_list_modification_pending || 4535 random_address_change){ 4536 4537 scanning_stop = true; 4538 } 4539 } 4540 #endif 4541 4542 #ifdef ENABLE_LE_CENTRAL 4543 // connecting control 4544 bool connecting_with_whitelist; 4545 switch (hci_stack->le_connecting_state){ 4546 case LE_CONNECTING_DIRECT: 4547 case LE_CONNECTING_WHITELIST: 4548 // stop connecting if: 4549 // - connecting uses white and whitelist modification pending 4550 // - if it got disabled 4551 // - resolving list modified 4552 // - own address changes 4553 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4554 if ((connecting_with_whitelist && whitelist_modification_pending) || 4555 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4556 resolving_list_modification_pending || 4557 random_address_change) { 4558 4559 connecting_stop = true; 4560 } 4561 break; 4562 default: 4563 break; 4564 } 4565 #endif 4566 4567 #ifdef ENABLE_LE_PERIPHERAL 4568 // le advertisement control 4569 if (hci_stack->le_advertisements_active){ 4570 // stop if: 4571 // - parameter change required 4572 // - random address used in advertising and changes 4573 // - it's disabled 4574 // - whitelist change required but used for advertisement filter policy 4575 // - resolving list modified 4576 // - own address changes 4577 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4578 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4579 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4580 if (advertising_change || 4581 (advertising_uses_random_address && random_address_change) || 4582 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4583 (advertising_uses_whitelist && whitelist_modification_pending) || 4584 resolving_list_modification_pending || 4585 random_address_change) { 4586 4587 advertising_stop = true; 4588 } 4589 } 4590 #endif 4591 4592 4593 // Phase 2: stop everything that should be off during modifications 4594 4595 #ifdef ENABLE_LE_CENTRAL 4596 if (scanning_stop){ 4597 hci_stack->le_scanning_active = false; 4598 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4599 if (hci_extended_advertising_supported()) { 4600 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4601 } else 4602 #endif 4603 { 4604 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4605 } 4606 return true; 4607 } 4608 #endif 4609 4610 #ifdef ENABLE_LE_CENTRAL 4611 if (connecting_stop){ 4612 hci_send_cmd(&hci_le_create_connection_cancel); 4613 return true; 4614 } 4615 #endif 4616 4617 #ifdef ENABLE_LE_PERIPHERAL 4618 if (advertising_stop){ 4619 hci_stack->le_advertisements_active = false; 4620 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4621 return true; 4622 } 4623 #endif 4624 4625 // Phase 3: modify 4626 4627 if (random_address_change){ 4628 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4629 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4630 return true; 4631 } 4632 4633 #ifdef ENABLE_LE_CENTRAL 4634 if (hci_stack->le_scanning_param_update){ 4635 hci_stack->le_scanning_param_update = false; 4636 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4637 if (hci_extended_advertising_supported()){ 4638 // prepare arrays for all PHYs 4639 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 4640 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 4641 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 4642 uint8_t scanning_phys = 1; // LE 1M PHY 4643 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 4644 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 4645 } else 4646 #endif 4647 { 4648 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4649 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4650 } 4651 return true; 4652 } 4653 #endif 4654 4655 #ifdef ENABLE_LE_PERIPHERAL 4656 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4657 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4658 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4659 hci_send_cmd(&hci_le_set_advertising_parameters, 4660 hci_stack->le_advertisements_interval_min, 4661 hci_stack->le_advertisements_interval_max, 4662 hci_stack->le_advertisements_type, 4663 hci_stack->le_advertisements_own_addr_type, 4664 hci_stack->le_advertisements_direct_address_type, 4665 hci_stack->le_advertisements_direct_address, 4666 hci_stack->le_advertisements_channel_map, 4667 hci_stack->le_advertisements_filter_policy); 4668 return true; 4669 } 4670 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4671 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4672 uint8_t adv_data_clean[31]; 4673 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4674 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4675 hci_stack->le_advertisements_data_len); 4676 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4677 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4678 return true; 4679 } 4680 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4681 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4682 uint8_t scan_data_clean[31]; 4683 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4684 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4685 hci_stack->le_scan_response_data_len); 4686 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4687 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4688 return true; 4689 } 4690 #endif 4691 4692 4693 #ifdef ENABLE_LE_CENTRAL 4694 // if connect with whitelist was active and is not cancelled yet, wait until next time 4695 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4696 #endif 4697 4698 // LE Whitelist Management 4699 if (whitelist_modification_pending){ 4700 // add/remove entries 4701 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4702 while (btstack_linked_list_iterator_has_next(&lit)){ 4703 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4704 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4705 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4706 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4707 return true; 4708 } 4709 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4710 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4711 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4712 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4713 return true; 4714 } 4715 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4716 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4717 btstack_memory_whitelist_entry_free(entry); 4718 } 4719 } 4720 } 4721 4722 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4723 // LE Resolving List Management 4724 if (resolving_list_supported) { 4725 uint16_t i; 4726 switch (hci_stack->le_resolving_list_state) { 4727 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4728 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4729 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4730 return true; 4731 case LE_RESOLVING_LIST_READ_SIZE: 4732 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4733 hci_send_cmd(&hci_le_read_resolving_list_size); 4734 return true; 4735 case LE_RESOLVING_LIST_SEND_CLEAR: 4736 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4737 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4738 sizeof(hci_stack->le_resolving_list_add_entries)); 4739 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4740 sizeof(hci_stack->le_resolving_list_remove_entries)); 4741 hci_send_cmd(&hci_le_clear_resolving_list); 4742 return true; 4743 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4744 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4745 uint8_t offset = i >> 3; 4746 uint8_t mask = 1 << (i & 7); 4747 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4748 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4749 bd_addr_t peer_identity_addreses; 4750 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4751 sm_key_t peer_irk; 4752 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4753 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4754 4755 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4756 // trigger whitelist entry 'update' (work around for controller bug) 4757 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4758 while (btstack_linked_list_iterator_has_next(&lit)) { 4759 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4760 if (entry->address_type != peer_identity_addr_type) continue; 4761 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4762 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4763 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4764 } 4765 #endif 4766 4767 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4768 peer_identity_addreses); 4769 return true; 4770 } 4771 4772 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4773 4774 /* fall through */ 4775 4776 case LE_RESOLVING_LIST_ADD_ENTRIES: 4777 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4778 uint8_t offset = i >> 3; 4779 uint8_t mask = 1 << (i & 7); 4780 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4781 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4782 bd_addr_t peer_identity_addreses; 4783 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4784 sm_key_t peer_irk; 4785 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4786 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4787 const uint8_t *local_irk = gap_get_persistent_irk(); 4788 // command uses format specifier 'P' that stores 16-byte value without flip 4789 uint8_t local_irk_flipped[16]; 4790 uint8_t peer_irk_flipped[16]; 4791 reverse_128(local_irk, local_irk_flipped); 4792 reverse_128(peer_irk, peer_irk_flipped); 4793 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4794 peer_irk_flipped, local_irk_flipped); 4795 return true; 4796 } 4797 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4798 break; 4799 4800 default: 4801 break; 4802 } 4803 } 4804 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4805 #endif 4806 4807 // post-pone all actions until stack is fully working 4808 if (hci_stack->state != HCI_STATE_WORKING) return false; 4809 4810 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4811 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4812 4813 // Phase 4: restore state 4814 4815 #ifdef ENABLE_LE_CENTRAL 4816 // re-start scanning 4817 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4818 hci_stack->le_scanning_active = true; 4819 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4820 if (hci_extended_advertising_supported()){ 4821 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 4822 } else 4823 #endif 4824 { 4825 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4826 } 4827 return true; 4828 } 4829 #endif 4830 4831 #ifdef ENABLE_LE_CENTRAL 4832 // re-start connecting 4833 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4834 bd_addr_t null_addr; 4835 memset(null_addr, 0, 6); 4836 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4837 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4838 hci_send_cmd(&hci_le_create_connection, 4839 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4840 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4841 1, // use whitelist 4842 0, // peer address type 4843 null_addr, // peer bd addr 4844 hci_stack->le_connection_own_addr_type, // our addr type: 4845 hci_stack->le_connection_interval_min, // conn interval min 4846 hci_stack->le_connection_interval_max, // conn interval max 4847 hci_stack->le_connection_latency, // conn latency 4848 hci_stack->le_supervision_timeout, // conn latency 4849 hci_stack->le_minimum_ce_length, // min ce length 4850 hci_stack->le_maximum_ce_length // max ce length 4851 ); 4852 return true; 4853 } 4854 #endif 4855 4856 #ifdef ENABLE_LE_PERIPHERAL 4857 // re-start advertising 4858 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4859 // check if advertisements should be enabled given 4860 hci_stack->le_advertisements_active = true; 4861 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4862 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4863 return true; 4864 } 4865 #endif 4866 4867 return false; 4868 } 4869 #endif 4870 4871 static bool hci_run_general_pending_commands(void){ 4872 btstack_linked_item_t * it; 4873 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4874 hci_connection_t * connection = (hci_connection_t *) it; 4875 4876 switch(connection->state){ 4877 case SEND_CREATE_CONNECTION: 4878 switch(connection->address_type){ 4879 #ifdef ENABLE_CLASSIC 4880 case BD_ADDR_TYPE_ACL: 4881 log_info("sending hci_create_connection"); 4882 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4883 break; 4884 #endif 4885 default: 4886 #ifdef ENABLE_BLE 4887 #ifdef ENABLE_LE_CENTRAL 4888 log_info("sending hci_le_create_connection"); 4889 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4890 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4891 hci_send_cmd(&hci_le_create_connection, 4892 hci_stack->le_connection_scan_interval, // conn scan interval 4893 hci_stack->le_connection_scan_window, // conn scan windows 4894 0, // don't use whitelist 4895 connection->address_type, // peer address type 4896 connection->address, // peer bd addr 4897 hci_stack->le_connection_own_addr_type, // our addr type: 4898 hci_stack->le_connection_interval_min, // conn interval min 4899 hci_stack->le_connection_interval_max, // conn interval max 4900 hci_stack->le_connection_latency, // conn latency 4901 hci_stack->le_supervision_timeout, // conn latency 4902 hci_stack->le_minimum_ce_length, // min ce length 4903 hci_stack->le_maximum_ce_length // max ce length 4904 ); 4905 connection->state = SENT_CREATE_CONNECTION; 4906 #endif 4907 #endif 4908 break; 4909 } 4910 return true; 4911 4912 #ifdef ENABLE_CLASSIC 4913 case RECEIVED_CONNECTION_REQUEST: 4914 connection->role = HCI_ROLE_SLAVE; 4915 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4916 log_info("sending hci_accept_connection_request"); 4917 connection->state = ACCEPTED_CONNECTION_REQUEST; 4918 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4919 return true; 4920 } 4921 break; 4922 #endif 4923 4924 #ifdef ENABLE_BLE 4925 #ifdef ENABLE_LE_CENTRAL 4926 case SEND_CANCEL_CONNECTION: 4927 connection->state = SENT_CANCEL_CONNECTION; 4928 hci_send_cmd(&hci_le_create_connection_cancel); 4929 return true; 4930 #endif 4931 #endif 4932 case SEND_DISCONNECT: 4933 connection->state = SENT_DISCONNECT; 4934 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4935 return true; 4936 4937 default: 4938 break; 4939 } 4940 4941 // no further commands if connection is about to get shut down 4942 if (connection->state == SENT_DISCONNECT) continue; 4943 4944 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4945 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4946 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4947 return true; 4948 } 4949 4950 #ifdef ENABLE_CLASSIC 4951 4952 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4953 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4954 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4955 return true; 4956 } 4957 4958 // Handling link key request requires remote supported features 4959 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4960 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4961 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4962 4963 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4964 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4965 if (have_link_key && security_level_sufficient){ 4966 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4967 } else { 4968 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4969 } 4970 return true; 4971 } 4972 4973 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4974 log_info("denying to pin request"); 4975 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4976 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4977 return true; 4978 } 4979 4980 // security assessment requires remote features 4981 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4982 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4983 hci_ssp_assess_security_on_io_cap_request(connection); 4984 // 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 4985 } 4986 4987 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4988 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4989 // set authentication requirements: 4990 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4991 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4992 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4993 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4994 authreq |= 1; 4995 } 4996 bool bonding = hci_stack->bondable; 4997 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4998 // if we have received IO Cap Response, we're in responder role 4999 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5000 if (bonding && !remote_bonding){ 5001 log_info("Remote not bonding, dropping local flag"); 5002 bonding = false; 5003 } 5004 } 5005 if (bonding){ 5006 if (connection->bonding_flags & BONDING_DEDICATED){ 5007 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5008 } else { 5009 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5010 } 5011 } 5012 uint8_t have_oob_data = 0; 5013 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5014 if (connection->classic_oob_c_192 != NULL){ 5015 have_oob_data |= 1; 5016 } 5017 if (connection->classic_oob_c_256 != NULL){ 5018 have_oob_data |= 2; 5019 } 5020 #endif 5021 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5022 return true; 5023 } 5024 5025 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5026 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5027 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5028 return true; 5029 } 5030 5031 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5032 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5033 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5034 const uint8_t zero[16] = { 0 }; 5035 const uint8_t * r_192 = zero; 5036 const uint8_t * c_192 = zero; 5037 const uint8_t * r_256 = zero; 5038 const uint8_t * c_256 = zero; 5039 // verify P-256 OOB 5040 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5041 c_256 = connection->classic_oob_c_256; 5042 if (connection->classic_oob_r_256 != NULL) { 5043 r_256 = connection->classic_oob_r_256; 5044 } 5045 } 5046 // verify P-192 OOB 5047 if ((connection->classic_oob_c_192 != NULL)) { 5048 c_192 = connection->classic_oob_c_192; 5049 if (connection->classic_oob_r_192 != NULL) { 5050 r_192 = connection->classic_oob_r_192; 5051 } 5052 } 5053 5054 // assess security 5055 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5056 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5057 if (need_level_4 && !can_reach_level_4){ 5058 log_info("Level 4 required, but not possible -> abort"); 5059 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5060 // send oob negative reply 5061 c_256 = NULL; 5062 c_192 = NULL; 5063 } 5064 5065 // Reply 5066 if (c_256 != zero) { 5067 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5068 } else if (c_192 != zero){ 5069 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5070 } else { 5071 hci_stack->classic_oob_con_handle = connection->con_handle; 5072 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5073 } 5074 return true; 5075 } 5076 #endif 5077 5078 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5079 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5080 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5081 return true; 5082 } 5083 5084 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5085 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5086 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5087 return true; 5088 } 5089 5090 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5091 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5092 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5093 return true; 5094 } 5095 5096 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5097 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5098 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5099 connection->state = SENT_DISCONNECT; 5100 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5101 return true; 5102 } 5103 5104 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5105 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5106 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5107 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5108 return true; 5109 } 5110 5111 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5112 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5113 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5114 return true; 5115 } 5116 5117 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5118 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5119 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5120 return true; 5121 } 5122 5123 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5124 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5125 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5126 return true; 5127 } 5128 5129 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5130 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5131 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5132 return true; 5133 } 5134 5135 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5136 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5137 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5138 return true; 5139 } 5140 #endif 5141 5142 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5143 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5144 #ifdef ENABLE_CLASSIC 5145 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5146 #endif 5147 if (connection->state != SENT_DISCONNECT){ 5148 connection->state = SENT_DISCONNECT; 5149 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5150 return true; 5151 } 5152 } 5153 5154 #ifdef ENABLE_CLASSIC 5155 uint16_t sniff_min_interval; 5156 switch (connection->sniff_min_interval){ 5157 case 0: 5158 break; 5159 case 0xffff: 5160 connection->sniff_min_interval = 0; 5161 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5162 return true; 5163 default: 5164 sniff_min_interval = connection->sniff_min_interval; 5165 connection->sniff_min_interval = 0; 5166 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5167 return true; 5168 } 5169 5170 if (connection->sniff_subrating_max_latency != 0xffff){ 5171 uint16_t max_latency = connection->sniff_subrating_max_latency; 5172 connection->sniff_subrating_max_latency = 0; 5173 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5174 return true; 5175 } 5176 5177 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5178 uint8_t service_type = (uint8_t) connection->qos_service_type; 5179 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5180 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); 5181 return true; 5182 } 5183 5184 if (connection->request_role != HCI_ROLE_INVALID){ 5185 hci_role_t role = connection->request_role; 5186 connection->request_role = HCI_ROLE_INVALID; 5187 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5188 return true; 5189 } 5190 #endif 5191 5192 #ifdef ENABLE_BLE 5193 switch (connection->le_con_parameter_update_state){ 5194 // response to L2CAP CON PARAMETER UPDATE REQUEST 5195 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5196 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5197 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5198 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5199 0x0000, 0xffff); 5200 return true; 5201 case CON_PARAMETER_UPDATE_REPLY: 5202 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5203 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5204 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5205 0x0000, 0xffff); 5206 return true; 5207 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5208 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5209 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5210 return true; 5211 default: 5212 break; 5213 } 5214 if (connection->le_phy_update_all_phys != 0xffu){ 5215 uint8_t all_phys = connection->le_phy_update_all_phys; 5216 connection->le_phy_update_all_phys = 0xff; 5217 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); 5218 return true; 5219 } 5220 #endif 5221 } 5222 return false; 5223 } 5224 5225 static void hci_run(void){ 5226 5227 // stack state sub statemachines 5228 // halting needs to be called even if we cannot send command packet now 5229 switch (hci_stack->state) { 5230 case HCI_STATE_INITIALIZING: 5231 hci_initializing_run(); 5232 break; 5233 case HCI_STATE_HALTING: 5234 hci_halting_run(); 5235 break; 5236 case HCI_STATE_FALLING_ASLEEP: 5237 hci_falling_asleep_run(); 5238 break; 5239 default: 5240 break; 5241 } 5242 5243 bool done; 5244 5245 // send continuation fragments first, as they block the prepared packet buffer 5246 done = hci_run_acl_fragments(); 5247 if (done) return; 5248 5249 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5250 // send host num completed packets next as they don't require num_cmd_packets > 0 5251 if (!hci_can_send_comand_packet_transport()) return; 5252 if (hci_stack->host_completed_packets){ 5253 hci_host_num_completed_packets(); 5254 return; 5255 } 5256 #endif 5257 5258 if (!hci_can_send_command_packet_now()) return; 5259 5260 // global/non-connection oriented commands 5261 5262 5263 #ifdef ENABLE_CLASSIC 5264 // general gap classic 5265 done = hci_run_general_gap_classic(); 5266 if (done) return; 5267 #endif 5268 5269 #ifdef ENABLE_BLE 5270 // general gap le 5271 done = hci_run_general_gap_le(); 5272 if (done) return; 5273 #endif 5274 5275 // send pending HCI commands 5276 hci_run_general_pending_commands(); 5277 } 5278 5279 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5280 // house-keeping 5281 5282 #ifdef ENABLE_CLASSIC 5283 bd_addr_t addr; 5284 hci_connection_t * conn; 5285 #endif 5286 #ifdef ENABLE_LE_CENTRAL 5287 uint8_t initiator_filter_policy; 5288 #endif 5289 5290 uint16_t opcode = little_endian_read_16(packet, 0); 5291 switch (opcode) { 5292 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5293 hci_stack->loopback_mode = packet[3]; 5294 break; 5295 5296 #ifdef ENABLE_CLASSIC 5297 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5298 reverse_bd_addr(&packet[3], addr); 5299 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5300 5301 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5302 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5303 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5304 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5305 } 5306 5307 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5308 if (!conn) { 5309 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5310 if (!conn) { 5311 // notify client that alloc failed 5312 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5313 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5314 } 5315 conn->state = SEND_CREATE_CONNECTION; 5316 conn->role = HCI_ROLE_MASTER; 5317 } 5318 5319 conn->con_handle = HCI_CON_HANDLE_INVALID; 5320 conn->role = HCI_ROLE_INVALID; 5321 5322 log_info("conn state %u", conn->state); 5323 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5324 switch (conn->state) { 5325 // if connection active exists 5326 case OPEN: 5327 // and OPEN, emit connection complete command 5328 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5329 // packet not sent to controller 5330 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5331 case RECEIVED_DISCONNECTION_COMPLETE: 5332 // create connection triggered in disconnect complete event, let's do it now 5333 break; 5334 case SEND_CREATE_CONNECTION: 5335 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5336 break; 5337 default: 5338 // otherwise, just ignore as it is already in the open process 5339 // packet not sent to controller 5340 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5341 } 5342 conn->state = SENT_CREATE_CONNECTION; 5343 5344 // track outgoing connection 5345 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5346 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5347 break; 5348 5349 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5350 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5351 // setup_synchronous_connection? Voice setting at offset 22 5352 // TODO: compare to current setting if sco connection already active 5353 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5354 break; 5355 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5356 // accept_synchronous_connection? Voice setting at offset 18 5357 // TODO: compare to current setting if sco connection already active 5358 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5359 // track outgoing connection 5360 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5361 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5362 break; 5363 #endif 5364 #endif 5365 5366 #ifdef ENABLE_BLE 5367 #ifdef ENABLE_LE_CENTRAL 5368 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5369 // white list used? 5370 initiator_filter_policy = packet[7]; 5371 switch (initiator_filter_policy) { 5372 case 0: 5373 // whitelist not used 5374 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5375 break; 5376 case 1: 5377 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5378 break; 5379 default: 5380 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5381 break; 5382 } 5383 // track outgoing connection 5384 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5385 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5386 break; 5387 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5388 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5389 break; 5390 #endif 5391 #endif 5392 default: 5393 break; 5394 } 5395 5396 hci_stack->num_cmd_packets--; 5397 5398 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5399 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5400 if (err != 0){ 5401 return ERROR_CODE_HARDWARE_FAILURE; 5402 } 5403 return ERROR_CODE_SUCCESS; 5404 } 5405 5406 // disconnect because of security block 5407 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5408 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5409 if (!connection) return; 5410 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5411 } 5412 5413 5414 // Configure Secure Simple Pairing 5415 5416 #ifdef ENABLE_CLASSIC 5417 5418 // enable will enable SSP during init 5419 void gap_ssp_set_enable(int enable){ 5420 hci_stack->ssp_enable = enable; 5421 } 5422 5423 static int hci_local_ssp_activated(void){ 5424 return gap_ssp_supported() && hci_stack->ssp_enable; 5425 } 5426 5427 // if set, BTstack will respond to io capability request using authentication requirement 5428 void gap_ssp_set_io_capability(int io_capability){ 5429 hci_stack->ssp_io_capability = io_capability; 5430 } 5431 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5432 hci_stack->ssp_authentication_requirement = authentication_requirement; 5433 } 5434 5435 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5436 void gap_ssp_set_auto_accept(int auto_accept){ 5437 hci_stack->ssp_auto_accept = auto_accept; 5438 } 5439 5440 void gap_secure_connections_enable(bool enable){ 5441 hci_stack->secure_connections_enable = enable; 5442 } 5443 5444 #endif 5445 5446 // va_list part of hci_send_cmd 5447 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5448 if (!hci_can_send_command_packet_now()){ 5449 log_error("hci_send_cmd called but cannot send packet now"); 5450 return ERROR_CODE_COMMAND_DISALLOWED; 5451 } 5452 5453 // for HCI INITIALIZATION 5454 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5455 hci_stack->last_cmd_opcode = cmd->opcode; 5456 5457 hci_reserve_packet_buffer(); 5458 uint8_t * packet = hci_stack->hci_packet_buffer; 5459 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5460 uint8_t status = hci_send_cmd_packet(packet, size); 5461 5462 // release packet buffer on error or for synchronous transport implementations 5463 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5464 hci_release_packet_buffer(); 5465 hci_emit_transport_packet_sent(); 5466 } 5467 5468 return status; 5469 } 5470 5471 /** 5472 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5473 */ 5474 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5475 va_list argptr; 5476 va_start(argptr, cmd); 5477 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5478 va_end(argptr); 5479 return status; 5480 } 5481 5482 // Create various non-HCI events. 5483 // TODO: generalize, use table similar to hci_create_command 5484 5485 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5486 // dump packet 5487 if (dump) { 5488 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5489 } 5490 5491 // dispatch to all event handlers 5492 btstack_linked_list_iterator_t it; 5493 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5494 while (btstack_linked_list_iterator_has_next(&it)){ 5495 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5496 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5497 } 5498 } 5499 5500 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5501 if (!hci_stack->acl_packet_handler) return; 5502 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5503 } 5504 5505 #ifdef ENABLE_CLASSIC 5506 static void hci_notify_if_sco_can_send_now(void){ 5507 // notify SCO sender if waiting 5508 if (!hci_stack->sco_waiting_for_can_send_now) return; 5509 if (hci_can_send_sco_packet_now()){ 5510 hci_stack->sco_waiting_for_can_send_now = 0; 5511 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5512 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5513 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5514 } 5515 } 5516 5517 // parsing end emitting has been merged to reduce code size 5518 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5519 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5520 5521 uint8_t * eir_data; 5522 ad_context_t context; 5523 const uint8_t * name; 5524 uint8_t name_len; 5525 5526 if (size < 3) return; 5527 5528 int event_type = hci_event_packet_get_type(packet); 5529 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5530 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5531 5532 switch (event_type){ 5533 case HCI_EVENT_INQUIRY_RESULT: 5534 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5535 if (size != (3 + (num_responses * 14))) return; 5536 break; 5537 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5538 if (size != 257) return; 5539 if (num_responses != 1) return; 5540 break; 5541 default: 5542 return; 5543 } 5544 5545 // event[1] is set at the end 5546 int i; 5547 for (i=0; i<num_responses;i++){ 5548 memset(event, 0, sizeof(event)); 5549 event[0] = GAP_EVENT_INQUIRY_RESULT; 5550 uint8_t event_size = 27; // if name is not set by EIR 5551 5552 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5553 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5554 (void)memcpy(&event[9], 5555 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5556 3); // class of device 5557 (void)memcpy(&event[12], 5558 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5559 2); // clock offset 5560 5561 switch (event_type){ 5562 case HCI_EVENT_INQUIRY_RESULT: 5563 // 14,15,16,17 = 0, size 18 5564 break; 5565 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5566 event[14] = 1; 5567 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5568 // 16,17 = 0, size 18 5569 break; 5570 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5571 event[14] = 1; 5572 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5573 // EIR packets only contain a single inquiry response 5574 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5575 name = NULL; 5576 // Iterate over EIR data 5577 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5578 uint8_t data_type = ad_iterator_get_data_type(&context); 5579 uint8_t data_size = ad_iterator_get_data_len(&context); 5580 const uint8_t * data = ad_iterator_get_data(&context); 5581 // Prefer Complete Local Name over Shortened Local Name 5582 switch (data_type){ 5583 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5584 if (name) continue; 5585 /* fall through */ 5586 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5587 name = data; 5588 name_len = data_size; 5589 break; 5590 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5591 if (data_size != 8) break; 5592 event[16] = 1; 5593 memcpy(&event[17], data, 8); 5594 break; 5595 default: 5596 break; 5597 } 5598 } 5599 if (name){ 5600 event[25] = 1; 5601 // truncate name if needed 5602 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5603 event[26] = len; 5604 (void)memcpy(&event[27], name, len); 5605 event_size += len; 5606 } 5607 break; 5608 default: 5609 return; 5610 } 5611 event[1] = event_size - 2; 5612 hci_emit_event(event, event_size, 1); 5613 } 5614 } 5615 #endif 5616 5617 void hci_emit_state(void){ 5618 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5619 uint8_t event[3]; 5620 event[0] = BTSTACK_EVENT_STATE; 5621 event[1] = sizeof(event) - 2u; 5622 event[2] = hci_stack->state; 5623 hci_emit_event(event, sizeof(event), 1); 5624 } 5625 5626 #ifdef ENABLE_CLASSIC 5627 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5628 uint8_t event[13]; 5629 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5630 event[1] = sizeof(event) - 2; 5631 event[2] = status; 5632 little_endian_store_16(event, 3, con_handle); 5633 reverse_bd_addr(address, &event[5]); 5634 event[11] = 1; // ACL connection 5635 event[12] = 0; // encryption disabled 5636 hci_emit_event(event, sizeof(event), 1); 5637 } 5638 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5639 if (disable_l2cap_timeouts) return; 5640 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5641 uint8_t event[4]; 5642 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5643 event[1] = sizeof(event) - 2; 5644 little_endian_store_16(event, 2, conn->con_handle); 5645 hci_emit_event(event, sizeof(event), 1); 5646 } 5647 #endif 5648 5649 #ifdef ENABLE_BLE 5650 #ifdef ENABLE_LE_CENTRAL 5651 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){ 5652 uint8_t event[21]; 5653 event[0] = HCI_EVENT_LE_META; 5654 event[1] = sizeof(event) - 2u; 5655 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5656 event[3] = status; 5657 little_endian_store_16(event, 4, con_handle); 5658 event[6] = 0; // TODO: role 5659 event[7] = address_type; 5660 reverse_bd_addr(address, &event[8]); 5661 little_endian_store_16(event, 14, 0); // interval 5662 little_endian_store_16(event, 16, 0); // latency 5663 little_endian_store_16(event, 18, 0); // supervision timeout 5664 event[20] = 0; // master clock accuracy 5665 hci_emit_event(event, sizeof(event), 1); 5666 } 5667 #endif 5668 #endif 5669 5670 static void hci_emit_transport_packet_sent(void){ 5671 // notify upper stack that it might be possible to send again 5672 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5673 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5674 } 5675 5676 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5677 uint8_t event[6]; 5678 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5679 event[1] = sizeof(event) - 2u; 5680 event[2] = 0; // status = OK 5681 little_endian_store_16(event, 3, con_handle); 5682 event[5] = reason; 5683 hci_emit_event(event, sizeof(event), 1); 5684 } 5685 5686 static void hci_emit_nr_connections_changed(void){ 5687 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5688 uint8_t event[3]; 5689 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5690 event[1] = sizeof(event) - 2u; 5691 event[2] = nr_hci_connections(); 5692 hci_emit_event(event, sizeof(event), 1); 5693 } 5694 5695 static void hci_emit_hci_open_failed(void){ 5696 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5697 uint8_t event[2]; 5698 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5699 event[1] = sizeof(event) - 2u; 5700 hci_emit_event(event, sizeof(event), 1); 5701 } 5702 5703 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5704 log_info("hci_emit_dedicated_bonding_result %u ", status); 5705 uint8_t event[9]; 5706 int pos = 0; 5707 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5708 event[pos++] = sizeof(event) - 2u; 5709 event[pos++] = status; 5710 reverse_bd_addr(address, &event[pos]); 5711 hci_emit_event(event, sizeof(event), 1); 5712 } 5713 5714 5715 #ifdef ENABLE_CLASSIC 5716 5717 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5718 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5719 uint8_t event[5]; 5720 int pos = 0; 5721 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5722 event[pos++] = sizeof(event) - 2; 5723 little_endian_store_16(event, 2, con_handle); 5724 pos += 2; 5725 event[pos++] = level; 5726 hci_emit_event(event, sizeof(event), 1); 5727 } 5728 5729 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5730 if (!connection) return LEVEL_0; 5731 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5732 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5733 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5734 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5735 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5736 // LEVEL 4 always requires 128 bit encrytion key size 5737 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5738 security_level = LEVEL_3; 5739 } 5740 return security_level; 5741 } 5742 5743 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5744 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5745 uint8_t event[3]; 5746 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5747 event[1] = sizeof(event) - 2; 5748 event[2] = enabled; 5749 hci_emit_event(event, sizeof(event), 1); 5750 } 5751 5752 // query if remote side supports eSCO 5753 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5754 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5755 if (!connection) return false; 5756 return (connection->remote_supported_features[0] & 1) != 0; 5757 } 5758 5759 static bool hci_ssp_supported(hci_connection_t * connection){ 5760 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5761 return (connection->bonding_flags & mask) == mask; 5762 } 5763 5764 // query if remote side supports SSP 5765 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5766 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5767 if (!connection) return false; 5768 return hci_ssp_supported(connection) ? 1 : 0; 5769 } 5770 5771 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5772 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5773 } 5774 5775 /** 5776 * Check if remote supported features query has completed 5777 */ 5778 bool hci_remote_features_available(hci_con_handle_t handle){ 5779 hci_connection_t * connection = hci_connection_for_handle(handle); 5780 if (!connection) return false; 5781 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5782 } 5783 5784 /** 5785 * Trigger remote supported features query 5786 */ 5787 5788 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5789 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5790 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5791 } 5792 } 5793 5794 void hci_remote_features_query(hci_con_handle_t con_handle){ 5795 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5796 if (!connection) return; 5797 hci_trigger_remote_features_for_connection(connection); 5798 hci_run(); 5799 } 5800 5801 // GAP API 5802 /** 5803 * @bbrief enable/disable bonding. default is enabled 5804 * @praram enabled 5805 */ 5806 void gap_set_bondable_mode(int enable){ 5807 hci_stack->bondable = enable ? 1 : 0; 5808 } 5809 /** 5810 * @brief Get bondable mode. 5811 * @return 1 if bondable 5812 */ 5813 int gap_get_bondable_mode(void){ 5814 return hci_stack->bondable; 5815 } 5816 5817 /** 5818 * @brief map link keys to security levels 5819 */ 5820 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5821 switch (link_key_type){ 5822 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5823 return LEVEL_4; 5824 case COMBINATION_KEY: 5825 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5826 return LEVEL_3; 5827 default: 5828 return LEVEL_2; 5829 } 5830 } 5831 5832 /** 5833 * @brief map link keys to secure connection yes/no 5834 */ 5835 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5836 switch (link_key_type){ 5837 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5838 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5839 return true; 5840 default: 5841 return false; 5842 } 5843 } 5844 5845 /** 5846 * @brief map link keys to authenticated 5847 */ 5848 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5849 switch (link_key_type){ 5850 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5851 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5852 return true; 5853 default: 5854 return false; 5855 } 5856 } 5857 5858 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5859 log_info("gap_mitm_protection_required_for_security_level %u", level); 5860 return level > LEVEL_2; 5861 } 5862 5863 /** 5864 * @brief get current security level 5865 */ 5866 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5867 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5868 if (!connection) return LEVEL_0; 5869 return gap_security_level_for_connection(connection); 5870 } 5871 5872 /** 5873 * @brief request connection to device to 5874 * @result GAP_AUTHENTICATION_RESULT 5875 */ 5876 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5877 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5878 if (!connection){ 5879 hci_emit_security_level(con_handle, LEVEL_0); 5880 return; 5881 } 5882 5883 btstack_assert(hci_is_le_connection(connection) == false); 5884 5885 // 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) 5886 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5887 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5888 requested_level = LEVEL_4; 5889 } 5890 5891 gap_security_level_t current_level = gap_security_level(con_handle); 5892 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5893 requested_level, connection->requested_security_level, current_level); 5894 5895 // authentication active if authentication request was sent or planned level > 0 5896 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5897 if (authentication_active){ 5898 // authentication already active 5899 if (connection->requested_security_level < requested_level){ 5900 // increase requested level as new level is higher 5901 // TODO: handle re-authentication when done 5902 connection->requested_security_level = requested_level; 5903 } 5904 } else { 5905 // no request active, notify if security sufficient 5906 if (requested_level <= current_level){ 5907 hci_emit_security_level(con_handle, current_level); 5908 return; 5909 } 5910 5911 // store request 5912 connection->requested_security_level = requested_level; 5913 5914 // request remote features if not already active 5915 hci_remote_features_query(con_handle); 5916 5917 // start to authenticate connection 5918 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5919 hci_run(); 5920 } 5921 } 5922 5923 /** 5924 * @brief start dedicated bonding with device. disconnect after bonding 5925 * @param device 5926 * @param request MITM protection 5927 * @result GAP_DEDICATED_BONDING_COMPLETE 5928 */ 5929 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5930 5931 // create connection state machine 5932 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5933 5934 if (!connection){ 5935 return BTSTACK_MEMORY_ALLOC_FAILED; 5936 } 5937 5938 // delete linkn key 5939 gap_drop_link_key_for_bd_addr(device); 5940 5941 // configure LEVEL_2/3, dedicated bonding 5942 connection->state = SEND_CREATE_CONNECTION; 5943 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5944 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5945 connection->bonding_flags = BONDING_DEDICATED; 5946 5947 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5948 5949 // handle: connnection failure (connection complete != ok) 5950 // handle: authentication failure 5951 // handle: disconnect on done 5952 5953 hci_run(); 5954 5955 return 0; 5956 } 5957 5958 void gap_set_local_name(const char * local_name){ 5959 hci_stack->local_name = local_name; 5960 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 5961 // also update EIR if not set by user 5962 if (hci_stack->eir_data == NULL){ 5963 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 5964 } 5965 hci_run(); 5966 } 5967 #endif 5968 5969 5970 #ifdef ENABLE_BLE 5971 5972 #ifdef ENABLE_LE_CENTRAL 5973 void gap_start_scan(void){ 5974 hci_stack->le_scanning_enabled = true; 5975 hci_run(); 5976 } 5977 5978 void gap_stop_scan(void){ 5979 hci_stack->le_scanning_enabled = false; 5980 hci_run(); 5981 } 5982 5983 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5984 hci_stack->le_scan_type = scan_type; 5985 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5986 hci_stack->le_scan_interval = scan_interval; 5987 hci_stack->le_scan_window = scan_window; 5988 hci_stack->le_scanning_param_update = true; 5989 hci_run(); 5990 } 5991 5992 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5993 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5994 } 5995 5996 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5997 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5998 if (!conn){ 5999 // disallow if le connection is already outgoing 6000 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6001 log_error("le connection already active"); 6002 return ERROR_CODE_COMMAND_DISALLOWED; 6003 } 6004 6005 log_info("gap_connect: no connection exists yet, creating context"); 6006 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6007 if (!conn){ 6008 // notify client that alloc failed 6009 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6010 log_info("gap_connect: failed to alloc hci_connection_t"); 6011 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6012 } 6013 6014 // set le connecting state 6015 if (hci_is_le_connection_type(addr_type)){ 6016 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6017 } 6018 6019 conn->state = SEND_CREATE_CONNECTION; 6020 log_info("gap_connect: send create connection next"); 6021 hci_run(); 6022 return ERROR_CODE_SUCCESS; 6023 } 6024 6025 if (!hci_is_le_connection(conn) || 6026 (conn->state == SEND_CREATE_CONNECTION) || 6027 (conn->state == SENT_CREATE_CONNECTION)) { 6028 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6029 log_error("gap_connect: classic connection or connect is already being created"); 6030 return GATT_CLIENT_IN_WRONG_STATE; 6031 } 6032 6033 // check if connection was just disconnected 6034 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6035 log_info("gap_connect: send create connection (again)"); 6036 conn->state = SEND_CREATE_CONNECTION; 6037 hci_run(); 6038 return ERROR_CODE_SUCCESS; 6039 } 6040 6041 log_info("gap_connect: context exists with state %u", conn->state); 6042 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6043 hci_run(); 6044 return ERROR_CODE_SUCCESS; 6045 } 6046 6047 // @assumption: only a single outgoing LE Connection exists 6048 static hci_connection_t * gap_get_outgoing_connection(void){ 6049 btstack_linked_item_t *it; 6050 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6051 hci_connection_t * conn = (hci_connection_t *) it; 6052 if (!hci_is_le_connection(conn)) continue; 6053 switch (conn->state){ 6054 case SEND_CREATE_CONNECTION: 6055 case SENT_CREATE_CONNECTION: 6056 case SENT_CANCEL_CONNECTION: 6057 return conn; 6058 default: 6059 break; 6060 }; 6061 } 6062 return NULL; 6063 } 6064 6065 uint8_t gap_connect_cancel(void){ 6066 hci_connection_t * conn = gap_get_outgoing_connection(); 6067 if (!conn) return 0; 6068 switch (conn->state){ 6069 case SEND_CREATE_CONNECTION: 6070 // skip sending create connection and emit event instead 6071 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6072 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6073 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6074 btstack_memory_hci_connection_free( conn ); 6075 break; 6076 case SENT_CREATE_CONNECTION: 6077 // request to send cancel connection 6078 conn->state = SEND_CANCEL_CONNECTION; 6079 hci_run(); 6080 break; 6081 default: 6082 break; 6083 } 6084 return 0; 6085 } 6086 #endif 6087 6088 #ifdef ENABLE_LE_CENTRAL 6089 /** 6090 * @brief Set connection parameters for outgoing connections 6091 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6092 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6093 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6094 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6095 * @param conn_latency, default: 4 6096 * @param supervision_timeout (unit: 10ms), default: 720 ms 6097 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6098 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6099 */ 6100 6101 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6102 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6103 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6104 hci_stack->le_connection_scan_interval = conn_scan_interval; 6105 hci_stack->le_connection_scan_window = conn_scan_window; 6106 hci_stack->le_connection_interval_min = conn_interval_min; 6107 hci_stack->le_connection_interval_max = conn_interval_max; 6108 hci_stack->le_connection_latency = conn_latency; 6109 hci_stack->le_supervision_timeout = supervision_timeout; 6110 hci_stack->le_minimum_ce_length = min_ce_length; 6111 hci_stack->le_maximum_ce_length = max_ce_length; 6112 } 6113 #endif 6114 6115 /** 6116 * @brief Updates the connection parameters for a given LE connection 6117 * @param handle 6118 * @param conn_interval_min (unit: 1.25ms) 6119 * @param conn_interval_max (unit: 1.25ms) 6120 * @param conn_latency 6121 * @param supervision_timeout (unit: 10ms) 6122 * @return 0 if ok 6123 */ 6124 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6125 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6126 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6127 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6128 connection->le_conn_interval_min = conn_interval_min; 6129 connection->le_conn_interval_max = conn_interval_max; 6130 connection->le_conn_latency = conn_latency; 6131 connection->le_supervision_timeout = supervision_timeout; 6132 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6133 hci_run(); 6134 return 0; 6135 } 6136 6137 /** 6138 * @brief Request an update of the connection parameter for a given LE connection 6139 * @param handle 6140 * @param conn_interval_min (unit: 1.25ms) 6141 * @param conn_interval_max (unit: 1.25ms) 6142 * @param conn_latency 6143 * @param supervision_timeout (unit: 10ms) 6144 * @return 0 if ok 6145 */ 6146 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6147 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6148 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6149 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6150 connection->le_conn_interval_min = conn_interval_min; 6151 connection->le_conn_interval_max = conn_interval_max; 6152 connection->le_conn_latency = conn_latency; 6153 connection->le_supervision_timeout = supervision_timeout; 6154 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6155 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6156 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6157 return 0; 6158 } 6159 6160 #ifdef ENABLE_LE_PERIPHERAL 6161 6162 /** 6163 * @brief Set Advertisement Data 6164 * @param advertising_data_length 6165 * @param advertising_data (max 31 octets) 6166 * @note data is not copied, pointer has to stay valid 6167 */ 6168 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6169 hci_stack->le_advertisements_data_len = advertising_data_length; 6170 hci_stack->le_advertisements_data = advertising_data; 6171 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6172 hci_run(); 6173 } 6174 6175 /** 6176 * @brief Set Scan Response Data 6177 * @param advertising_data_length 6178 * @param advertising_data (max 31 octets) 6179 * @note data is not copied, pointer has to stay valid 6180 */ 6181 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6182 hci_stack->le_scan_response_data_len = scan_response_data_length; 6183 hci_stack->le_scan_response_data = scan_response_data; 6184 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6185 hci_run(); 6186 } 6187 6188 /** 6189 * @brief Set Advertisement Parameters 6190 * @param adv_int_min 6191 * @param adv_int_max 6192 * @param adv_type 6193 * @param direct_address_type 6194 * @param direct_address 6195 * @param channel_map 6196 * @param filter_policy 6197 * 6198 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6199 */ 6200 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6201 uint8_t direct_address_typ, bd_addr_t direct_address, 6202 uint8_t channel_map, uint8_t filter_policy) { 6203 6204 hci_stack->le_advertisements_interval_min = adv_int_min; 6205 hci_stack->le_advertisements_interval_max = adv_int_max; 6206 hci_stack->le_advertisements_type = adv_type; 6207 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6208 hci_stack->le_advertisements_channel_map = channel_map; 6209 hci_stack->le_advertisements_filter_policy = filter_policy; 6210 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6211 6); 6212 6213 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6214 hci_run(); 6215 } 6216 6217 /** 6218 * @brief Enable/Disable Advertisements 6219 * @param enabled 6220 */ 6221 void gap_advertisements_enable(int enabled){ 6222 hci_stack->le_advertisements_enabled = enabled != 0; 6223 hci_update_advertisements_enabled_for_current_roles(); 6224 hci_run(); 6225 } 6226 6227 #endif 6228 6229 void hci_le_set_own_address_type(uint8_t own_address_type){ 6230 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6231 if (own_address_type == hci_stack->le_own_addr_type) return; 6232 hci_stack->le_own_addr_type = own_address_type; 6233 6234 #ifdef ENABLE_LE_PERIPHERAL 6235 // update advertisement parameters, too 6236 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6237 hci_run(); 6238 #endif 6239 #ifdef ENABLE_LE_CENTRAL 6240 // note: we don't update scan parameters or modify ongoing connection attempts 6241 #endif 6242 } 6243 6244 void hci_le_random_address_set(const bd_addr_t random_address){ 6245 memcpy(hci_stack->le_random_address, random_address, 6); 6246 hci_stack->le_random_address_set = true; 6247 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6248 hci_run(); 6249 } 6250 6251 #endif 6252 6253 uint8_t gap_disconnect(hci_con_handle_t handle){ 6254 hci_connection_t * conn = hci_connection_for_handle(handle); 6255 if (!conn){ 6256 hci_emit_disconnection_complete(handle, 0); 6257 return 0; 6258 } 6259 // ignore if already disconnected 6260 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6261 return 0; 6262 } 6263 conn->state = SEND_DISCONNECT; 6264 hci_run(); 6265 return 0; 6266 } 6267 6268 int gap_read_rssi(hci_con_handle_t con_handle){ 6269 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6270 if (hci_connection == NULL) return 0; 6271 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6272 hci_run(); 6273 return 1; 6274 } 6275 6276 /** 6277 * @brief Get connection type 6278 * @param con_handle 6279 * @result connection_type 6280 */ 6281 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6282 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6283 if (!conn) return GAP_CONNECTION_INVALID; 6284 switch (conn->address_type){ 6285 case BD_ADDR_TYPE_LE_PUBLIC: 6286 case BD_ADDR_TYPE_LE_RANDOM: 6287 return GAP_CONNECTION_LE; 6288 case BD_ADDR_TYPE_SCO: 6289 return GAP_CONNECTION_SCO; 6290 case BD_ADDR_TYPE_ACL: 6291 return GAP_CONNECTION_ACL; 6292 default: 6293 return GAP_CONNECTION_INVALID; 6294 } 6295 } 6296 6297 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6298 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6299 if (!conn) return HCI_ROLE_INVALID; 6300 return (hci_role_t) conn->role; 6301 } 6302 6303 6304 #ifdef ENABLE_CLASSIC 6305 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6306 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6307 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6308 conn->request_role = role; 6309 hci_run(); 6310 return ERROR_CODE_SUCCESS; 6311 } 6312 #endif 6313 6314 #ifdef ENABLE_BLE 6315 6316 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){ 6317 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6318 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6319 6320 conn->le_phy_update_all_phys = all_phys; 6321 conn->le_phy_update_tx_phys = tx_phys; 6322 conn->le_phy_update_rx_phys = rx_phys; 6323 conn->le_phy_update_phy_options = phy_options; 6324 6325 hci_run(); 6326 6327 return 0; 6328 } 6329 6330 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6331 // check if already in list 6332 btstack_linked_list_iterator_t it; 6333 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6334 while (btstack_linked_list_iterator_has_next(&it)) { 6335 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6336 if (entry->address_type != address_type) { 6337 continue; 6338 } 6339 if (memcmp(entry->address, address, 6) != 0) { 6340 continue; 6341 } 6342 // disallow if already scheduled to add 6343 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6344 return ERROR_CODE_COMMAND_DISALLOWED; 6345 } 6346 // still on controller, but scheduled to remove -> re-add 6347 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6348 return ERROR_CODE_SUCCESS; 6349 } 6350 // alloc and add to list 6351 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6352 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6353 entry->address_type = address_type; 6354 (void)memcpy(entry->address, address, 6); 6355 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6356 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6357 return ERROR_CODE_SUCCESS; 6358 } 6359 6360 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6361 btstack_linked_list_iterator_t it; 6362 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6363 while (btstack_linked_list_iterator_has_next(&it)){ 6364 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6365 if (entry->address_type != address_type) { 6366 continue; 6367 } 6368 if (memcmp(entry->address, address, 6) != 0) { 6369 continue; 6370 } 6371 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6372 // remove from controller if already present 6373 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6374 } else { 6375 // directly remove entry from whitelist 6376 btstack_linked_list_iterator_remove(&it); 6377 btstack_memory_whitelist_entry_free(entry); 6378 } 6379 return ERROR_CODE_SUCCESS; 6380 } 6381 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6382 } 6383 6384 static void hci_whitelist_clear(void){ 6385 btstack_linked_list_iterator_t it; 6386 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6387 while (btstack_linked_list_iterator_has_next(&it)){ 6388 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6389 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6390 // remove from controller if already present 6391 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6392 continue; 6393 } 6394 // directly remove entry from whitelist 6395 btstack_linked_list_iterator_remove(&it); 6396 btstack_memory_whitelist_entry_free(entry); 6397 } 6398 } 6399 6400 // free all entries unconditionally 6401 static void hci_whitelist_free(void){ 6402 btstack_linked_list_iterator_t lit; 6403 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6404 while (btstack_linked_list_iterator_has_next(&lit)){ 6405 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6406 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6407 btstack_memory_whitelist_entry_free(entry); 6408 } 6409 } 6410 6411 /** 6412 * @brief Clear Whitelist 6413 * @return 0 if ok 6414 */ 6415 uint8_t gap_whitelist_clear(void){ 6416 hci_whitelist_clear(); 6417 hci_run(); 6418 return ERROR_CODE_SUCCESS; 6419 } 6420 6421 /** 6422 * @brief Add Device to Whitelist 6423 * @param address_typ 6424 * @param address 6425 * @return 0 if ok 6426 */ 6427 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6428 uint8_t status = hci_whitelist_add(address_type, address); 6429 if (status){ 6430 return status; 6431 } 6432 hci_run(); 6433 return ERROR_CODE_SUCCESS; 6434 } 6435 6436 /** 6437 * @brief Remove Device from Whitelist 6438 * @param address_typ 6439 * @param address 6440 * @return 0 if ok 6441 */ 6442 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6443 uint8_t status = hci_whitelist_remove(address_type, address); 6444 if (status){ 6445 return status; 6446 } 6447 hci_run(); 6448 return ERROR_CODE_SUCCESS; 6449 } 6450 6451 #ifdef ENABLE_LE_CENTRAL 6452 /** 6453 * @brief Connect with Whitelist 6454 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6455 * @return - if ok 6456 */ 6457 uint8_t gap_connect_with_whitelist(void){ 6458 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6459 return ERROR_CODE_COMMAND_DISALLOWED; 6460 } 6461 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6462 hci_run(); 6463 return ERROR_CODE_SUCCESS; 6464 } 6465 6466 /** 6467 * @brief Auto Connection Establishment - Start Connecting to device 6468 * @param address_typ 6469 * @param address 6470 * @return 0 if ok 6471 */ 6472 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6473 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6474 return ERROR_CODE_COMMAND_DISALLOWED; 6475 } 6476 6477 uint8_t status = hci_whitelist_add(address_type, address); 6478 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6479 return status; 6480 } 6481 6482 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6483 6484 hci_run(); 6485 return ERROR_CODE_SUCCESS; 6486 } 6487 6488 /** 6489 * @brief Auto Connection Establishment - Stop Connecting to device 6490 * @param address_typ 6491 * @param address 6492 * @return 0 if ok 6493 */ 6494 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6495 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6496 return ERROR_CODE_COMMAND_DISALLOWED; 6497 } 6498 6499 hci_whitelist_remove(address_type, address); 6500 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6501 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6502 } 6503 hci_run(); 6504 return 0; 6505 } 6506 6507 /** 6508 * @brief Auto Connection Establishment - Stop everything 6509 * @note Convenience function to stop all active auto connection attempts 6510 */ 6511 uint8_t gap_auto_connection_stop_all(void){ 6512 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6513 return ERROR_CODE_COMMAND_DISALLOWED; 6514 } 6515 hci_whitelist_clear(); 6516 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6517 hci_run(); 6518 return ERROR_CODE_SUCCESS; 6519 } 6520 6521 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6522 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6523 if (!conn) return 0; 6524 return conn->le_connection_interval; 6525 } 6526 #endif 6527 #endif 6528 6529 #ifdef ENABLE_CLASSIC 6530 /** 6531 * @brief Set Extended Inquiry Response data 6532 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6533 * @note has to be done before stack starts up 6534 */ 6535 void gap_set_extended_inquiry_response(const uint8_t * data){ 6536 hci_stack->eir_data = data; 6537 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6538 hci_run(); 6539 } 6540 6541 /** 6542 * @brief Start GAP Classic Inquiry 6543 * @param duration in 1.28s units 6544 * @return 0 if ok 6545 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6546 */ 6547 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6548 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6549 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6550 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6551 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6552 } 6553 hci_stack->inquiry_state = duration_in_1280ms_units; 6554 hci_run(); 6555 return 0; 6556 } 6557 6558 /** 6559 * @brief Stop GAP Classic Inquiry 6560 * @return 0 if ok 6561 */ 6562 int gap_inquiry_stop(void){ 6563 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6564 // emit inquiry complete event, before it even started 6565 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6566 hci_emit_event(event, sizeof(event), 1); 6567 return 0; 6568 } 6569 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6570 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6571 hci_run(); 6572 return 0; 6573 } 6574 6575 void gap_inquiry_set_lap(uint32_t lap){ 6576 hci_stack->inquiry_lap = lap; 6577 } 6578 6579 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6580 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6581 hci_stack->inquiry_scan_window = inquiry_scan_window; 6582 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6583 hci_run(); 6584 } 6585 6586 6587 /** 6588 * @brief Remote Name Request 6589 * @param addr 6590 * @param page_scan_repetition_mode 6591 * @param clock_offset only used when bit 15 is set 6592 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6593 */ 6594 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6595 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6596 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6597 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6598 hci_stack->remote_name_clock_offset = clock_offset; 6599 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6600 hci_run(); 6601 return 0; 6602 } 6603 6604 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6605 hci_stack->gap_pairing_state = state; 6606 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6607 hci_run(); 6608 return 0; 6609 } 6610 6611 /** 6612 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6613 * @param addr 6614 * @param pin_data 6615 * @param pin_len 6616 * @return 0 if ok 6617 */ 6618 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6619 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6620 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6621 hci_stack->gap_pairing_pin_len = pin_len; 6622 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6623 } 6624 6625 /** 6626 * @brief Legacy Pairing Pin Code Response 6627 * @param addr 6628 * @param pin 6629 * @return 0 if ok 6630 */ 6631 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6632 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6633 } 6634 6635 /** 6636 * @brief Abort Legacy Pairing 6637 * @param addr 6638 * @param pin 6639 * @return 0 if ok 6640 */ 6641 int gap_pin_code_negative(bd_addr_t addr){ 6642 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6643 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6644 } 6645 6646 /** 6647 * @brief SSP Passkey Response 6648 * @param addr 6649 * @param passkey 6650 * @return 0 if ok 6651 */ 6652 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6653 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6654 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6655 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6656 } 6657 6658 /** 6659 * @brief Abort SSP Passkey Entry/Pairing 6660 * @param addr 6661 * @param pin 6662 * @return 0 if ok 6663 */ 6664 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6665 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6666 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6667 } 6668 6669 /** 6670 * @brief Accept SSP Numeric Comparison 6671 * @param addr 6672 * @param passkey 6673 * @return 0 if ok 6674 */ 6675 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6676 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6677 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6678 } 6679 6680 /** 6681 * @brief Abort SSP Numeric Comparison/Pairing 6682 * @param addr 6683 * @param pin 6684 * @return 0 if ok 6685 */ 6686 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6687 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6688 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6689 } 6690 6691 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6692 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6693 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6694 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6695 connectionSetAuthenticationFlags(conn, flag); 6696 hci_run(); 6697 return ERROR_CODE_SUCCESS; 6698 } 6699 #endif 6700 6701 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6702 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6703 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6704 } 6705 6706 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6707 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6708 } 6709 #endif 6710 6711 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6712 /** 6713 * @brief Report Remote OOB Data 6714 * @param bd_addr 6715 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6716 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6717 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6718 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6719 */ 6720 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){ 6721 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6722 if (connection == NULL) { 6723 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6724 } 6725 connection->classic_oob_c_192 = c_192; 6726 connection->classic_oob_r_192 = r_192; 6727 6728 // ignore P-256 if not supported by us 6729 if (hci_stack->secure_connections_active){ 6730 connection->classic_oob_c_256 = c_256; 6731 connection->classic_oob_r_256 = r_256; 6732 } 6733 6734 return ERROR_CODE_SUCCESS; 6735 } 6736 /** 6737 * @brief Generate new OOB data 6738 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6739 */ 6740 void gap_ssp_generate_oob_data(void){ 6741 hci_stack->classic_read_local_oob_data = true; 6742 hci_run(); 6743 } 6744 6745 #endif 6746 6747 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6748 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6749 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6750 if (connection == NULL) { 6751 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6752 } 6753 6754 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6755 connection->link_key_type = type; 6756 6757 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6758 } 6759 6760 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6761 /** 6762 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6763 * @param inquiry_mode see bluetooth_defines.h 6764 */ 6765 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6766 hci_stack->inquiry_mode = inquiry_mode; 6767 } 6768 6769 /** 6770 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6771 */ 6772 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6773 hci_stack->sco_voice_setting = voice_setting; 6774 } 6775 6776 /** 6777 * @brief Get SCO Voice Setting 6778 * @return current voice setting 6779 */ 6780 uint16_t hci_get_sco_voice_setting(void){ 6781 return hci_stack->sco_voice_setting; 6782 } 6783 6784 static int hci_have_usb_transport(void){ 6785 if (!hci_stack->hci_transport) return 0; 6786 const char * transport_name = hci_stack->hci_transport->name; 6787 if (!transport_name) return 0; 6788 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6789 } 6790 6791 /** @brief Get SCO packet length for current SCO Voice setting 6792 * @note Using SCO packets of the exact length is required for USB transfer 6793 * @return Length of SCO packets in bytes (not audio frames) 6794 */ 6795 uint16_t hci_get_sco_packet_length(void){ 6796 uint16_t sco_packet_length = 0; 6797 6798 #ifdef ENABLE_SCO_OVER_HCI 6799 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6800 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6801 6802 if (hci_have_usb_transport()){ 6803 // see Core Spec for H2 USB Transfer. 6804 // 3 byte SCO header + 24 bytes per connection 6805 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6806 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6807 } else { 6808 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6809 sco_packet_length = 3 + 60 * multiplier; 6810 // assert that it still fits inside an SCO buffer 6811 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6812 sco_packet_length = 3 + 60; 6813 } 6814 } 6815 #endif 6816 6817 #ifdef HAVE_SCO_TRANSPORT 6818 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6819 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6820 sco_packet_length = 3 + 60 * multiplier; 6821 #endif 6822 return sco_packet_length; 6823 } 6824 6825 /** 6826 * @brief Sets the master/slave policy 6827 * @param policy (0: attempt to become master, 1: let connecting device decide) 6828 */ 6829 void hci_set_master_slave_policy(uint8_t policy){ 6830 hci_stack->master_slave_policy = policy; 6831 } 6832 6833 #endif 6834 6835 HCI_STATE hci_get_state(void){ 6836 return hci_stack->state; 6837 } 6838 6839 #ifdef ENABLE_CLASSIC 6840 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6841 hci_stack->gap_classic_accept_callback = accept_callback; 6842 } 6843 #endif 6844 6845 /** 6846 * @brief Set callback for Bluetooth Hardware Error 6847 */ 6848 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6849 hci_stack->hardware_error_callback = fn; 6850 } 6851 6852 void hci_disconnect_all(void){ 6853 btstack_linked_list_iterator_t it; 6854 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6855 while (btstack_linked_list_iterator_has_next(&it)){ 6856 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6857 if (con->state == SENT_DISCONNECT) continue; 6858 con->state = SEND_DISCONNECT; 6859 } 6860 hci_run(); 6861 } 6862 6863 uint16_t hci_get_manufacturer(void){ 6864 return hci_stack->manufacturer; 6865 } 6866 6867 #ifdef ENABLE_BLE 6868 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6869 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6870 if (!hci_con) return NULL; 6871 return &hci_con->sm_connection; 6872 } 6873 6874 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6875 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6876 #endif 6877 6878 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 6879 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6880 if (hci_connection == NULL) return 0; 6881 if (hci_is_le_connection(hci_connection)){ 6882 #ifdef ENABLE_BLE 6883 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6884 if (sm_conn->sm_connection_encrypted) { 6885 return sm_conn->sm_actual_encryption_key_size; 6886 } 6887 #endif 6888 } else { 6889 #ifdef ENABLE_CLASSIC 6890 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6891 return hci_connection->encryption_key_size; 6892 } 6893 #endif 6894 } 6895 return 0; 6896 } 6897 6898 bool gap_authenticated(hci_con_handle_t con_handle){ 6899 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6900 if (hci_connection == NULL) return false; 6901 6902 switch (hci_connection->address_type){ 6903 #ifdef ENABLE_BLE 6904 case BD_ADDR_TYPE_LE_PUBLIC: 6905 case BD_ADDR_TYPE_LE_RANDOM: 6906 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6907 return hci_connection->sm_connection.sm_connection_authenticated != 0; 6908 #endif 6909 #ifdef ENABLE_CLASSIC 6910 case BD_ADDR_TYPE_SCO: 6911 case BD_ADDR_TYPE_ACL: 6912 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6913 #endif 6914 default: 6915 return false; 6916 } 6917 } 6918 6919 bool gap_secure_connection(hci_con_handle_t con_handle){ 6920 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6921 if (hci_connection == NULL) return 0; 6922 6923 switch (hci_connection->address_type){ 6924 #ifdef ENABLE_BLE 6925 case BD_ADDR_TYPE_LE_PUBLIC: 6926 case BD_ADDR_TYPE_LE_RANDOM: 6927 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 6928 return hci_connection->sm_connection.sm_connection_sc != 0; 6929 #endif 6930 #ifdef ENABLE_CLASSIC 6931 case BD_ADDR_TYPE_SCO: 6932 case BD_ADDR_TYPE_ACL: 6933 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6934 #endif 6935 default: 6936 return false; 6937 } 6938 } 6939 6940 bool gap_bonded(hci_con_handle_t con_handle){ 6941 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6942 if (hci_connection == NULL) return 0; 6943 6944 #ifdef ENABLE_CLASSIC 6945 link_key_t link_key; 6946 link_key_type_t link_key_type; 6947 #endif 6948 switch (hci_connection->address_type){ 6949 #ifdef ENABLE_BLE 6950 case BD_ADDR_TYPE_LE_PUBLIC: 6951 case BD_ADDR_TYPE_LE_RANDOM: 6952 return hci_connection->sm_connection.sm_le_db_index >= 0; 6953 #endif 6954 #ifdef ENABLE_CLASSIC 6955 case BD_ADDR_TYPE_SCO: 6956 case BD_ADDR_TYPE_ACL: 6957 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6958 #endif 6959 default: 6960 return false; 6961 } 6962 } 6963 6964 #ifdef ENABLE_BLE 6965 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6966 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6967 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6968 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6969 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6970 return sm_conn->sm_connection_authorization_state; 6971 } 6972 #endif 6973 6974 #ifdef ENABLE_CLASSIC 6975 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){ 6976 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6977 if (!conn) return GAP_CONNECTION_INVALID; 6978 conn->sniff_min_interval = sniff_min_interval; 6979 conn->sniff_max_interval = sniff_max_interval; 6980 conn->sniff_attempt = sniff_attempt; 6981 conn->sniff_timeout = sniff_timeout; 6982 hci_run(); 6983 return 0; 6984 } 6985 6986 /** 6987 * @brief Exit Sniff mode 6988 * @param con_handle 6989 @ @return 0 if ok 6990 */ 6991 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6992 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6993 if (!conn) return GAP_CONNECTION_INVALID; 6994 conn->sniff_min_interval = 0xffff; 6995 hci_run(); 6996 return 0; 6997 } 6998 6999 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){ 7000 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7001 if (!conn) return GAP_CONNECTION_INVALID; 7002 conn->sniff_subrating_max_latency = max_latency; 7003 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7004 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7005 hci_run(); 7006 return ERROR_CODE_SUCCESS; 7007 } 7008 7009 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){ 7010 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7011 if (!conn) return GAP_CONNECTION_INVALID; 7012 conn->qos_service_type = service_type; 7013 conn->qos_token_rate = token_rate; 7014 conn->qos_peak_bandwidth = peak_bandwidth; 7015 conn->qos_latency = latency; 7016 conn->qos_delay_variation = delay_variation; 7017 hci_run(); 7018 return ERROR_CODE_SUCCESS; 7019 } 7020 7021 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7022 hci_stack->new_page_scan_interval = page_scan_interval; 7023 hci_stack->new_page_scan_window = page_scan_window; 7024 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7025 hci_run(); 7026 } 7027 7028 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7029 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7030 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7031 hci_run(); 7032 } 7033 7034 void gap_set_page_timeout(uint16_t page_timeout){ 7035 hci_stack->page_timeout = page_timeout; 7036 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7037 hci_run(); 7038 } 7039 7040 #endif 7041 7042 void hci_halting_defer(void){ 7043 if (hci_stack->state != HCI_STATE_HALTING) return; 7044 switch (hci_stack->substate){ 7045 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 7046 case HCI_HALTING_CLOSE: 7047 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 7048 break; 7049 default: 7050 break; 7051 } 7052 } 7053 7054 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7055 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7056 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7057 if (le_device_db_index >= le_device_db_max_count()) return; 7058 uint8_t offset = le_device_db_index >> 3; 7059 uint8_t mask = 1 << (le_device_db_index & 7); 7060 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7061 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7062 // note: go back to remove entries, otherwise, a remove + add will skip the add 7063 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7064 } 7065 } 7066 7067 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7068 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7069 if (le_device_db_index >= le_device_db_max_count()) return; 7070 uint8_t offset = le_device_db_index >> 3; 7071 uint8_t mask = 1 << (le_device_db_index & 7); 7072 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7073 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7074 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7075 } 7076 } 7077 7078 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7079 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7080 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7081 } 7082 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7083 // restart le resolving list update 7084 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7085 } 7086 return ERROR_CODE_SUCCESS; 7087 } 7088 #endif 7089 7090 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7091 void hci_setup_test_connections_fuzz(void){ 7092 hci_connection_t * conn; 7093 7094 // default address: 66:55:44:33:00:01 7095 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7096 7097 // setup Controller info 7098 hci_stack->num_cmd_packets = 255; 7099 hci_stack->acl_packets_total_num = 255; 7100 7101 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7102 addr[5] = 0x01; 7103 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7104 conn->con_handle = addr[5]; 7105 conn->role = HCI_ROLE_SLAVE; 7106 conn->state = RECEIVED_CONNECTION_REQUEST; 7107 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7108 7109 // setup incoming Classic SCO connection with con handle 0x0002 7110 addr[5] = 0x02; 7111 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7112 conn->con_handle = addr[5]; 7113 conn->role = HCI_ROLE_SLAVE; 7114 conn->state = RECEIVED_CONNECTION_REQUEST; 7115 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7116 7117 // setup ready Classic ACL connection with con handle 0x0003 7118 addr[5] = 0x03; 7119 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7120 conn->con_handle = addr[5]; 7121 conn->role = HCI_ROLE_SLAVE; 7122 conn->state = OPEN; 7123 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7124 7125 // setup ready Classic SCO connection with con handle 0x0004 7126 addr[5] = 0x04; 7127 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7128 conn->con_handle = addr[5]; 7129 conn->role = HCI_ROLE_SLAVE; 7130 conn->state = OPEN; 7131 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7132 7133 // setup ready LE ACL connection with con handle 0x005 and public address 7134 addr[5] = 0x05; 7135 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7136 conn->con_handle = addr[5]; 7137 conn->role = HCI_ROLE_SLAVE; 7138 conn->state = OPEN; 7139 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7140 conn->sm_connection.sm_connection_encrypted = 1; 7141 } 7142 7143 void hci_free_connections_fuzz(void){ 7144 btstack_linked_list_iterator_t it; 7145 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7146 while (btstack_linked_list_iterator_has_next(&it)){ 7147 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7148 btstack_linked_list_iterator_remove(&it); 7149 btstack_memory_hci_connection_free(con); 7150 } 7151 } 7152 void hci_simulate_working_fuzz(void){ 7153 hci_stack->le_scanning_param_update = false; 7154 hci_init_done(); 7155 hci_stack->num_cmd_packets = 255; 7156 } 7157 #endif 7158