1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // 136 // compact storage of relevant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into the supported 138 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 139 // 140 141 // format: command name, byte offset, bit nr in 64-byte supported commands 142 #define SUPPORTED_HCI_COMMANDS \ 143 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 144 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 145 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 146 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 147 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 148 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 149 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 151 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 152 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 153 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 154 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 156 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 157 158 // enumerate supported commands 159 #define X(name, offset, bit) name, 160 enum { 161 SUPPORTED_HCI_COMMANDS 162 SUPPORTED_HCI_COMMANDS_COUNT 163 }; 164 #undef X 165 166 // assert supported hci commands bitmap fits into provided storage 167 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 168 #error "Storage for supported HCI commands too small" 169 #endif 170 171 // prototypes 172 #ifdef ENABLE_CLASSIC 173 static void hci_update_scan_enable(void); 174 static void hci_emit_discoverable_enabled(uint8_t enabled); 175 static int hci_local_ssp_activated(void); 176 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 177 static bool hci_ssp_supported(hci_connection_t * connection); 178 static void hci_notify_if_sco_can_send_now(void); 179 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 180 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 181 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 182 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 183 static void hci_connection_timestamp(hci_connection_t *connection); 184 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 185 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 186 #endif 187 188 static int hci_power_control_on(void); 189 static void hci_power_control_off(void); 190 static void hci_state_reset(void); 191 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 192 static void hci_emit_transport_packet_sent(void); 193 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 194 static void hci_emit_nr_connections_changed(void); 195 static void hci_emit_hci_open_failed(void); 196 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 197 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 198 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 199 static void hci_run(void); 200 static int hci_is_le_connection(hci_connection_t * connection); 201 202 #ifdef ENABLE_CLASSIC 203 static int hci_have_usb_transport(void); 204 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 205 #endif 206 207 #ifdef ENABLE_BLE 208 #ifdef ENABLE_LE_CENTRAL 209 // called from test/ble_client/advertising_data_parser.c 210 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 211 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 212 static void hci_whitelist_free(void); 213 static hci_connection_t * gap_get_outgoing_connection(void); 214 static bool hci_run_general_gap_le(void); 215 #endif 216 #endif 217 218 // the STACK is here 219 #ifndef HAVE_MALLOC 220 static hci_stack_t hci_stack_static; 221 #endif 222 static hci_stack_t * hci_stack = NULL; 223 224 #ifdef ENABLE_CLASSIC 225 // default name 226 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 227 228 // test helper 229 static uint8_t disable_l2cap_timeouts = 0; 230 #endif 231 232 // reset connection state on create and on reconnect 233 // don't overwrite addr, con handle, role 234 static void hci_connection_init(hci_connection_t * conn){ 235 conn->authentication_flags = AUTH_FLAG_NONE; 236 conn->bonding_flags = 0; 237 conn->requested_security_level = LEVEL_0; 238 #ifdef ENABLE_CLASSIC 239 conn->request_role = HCI_ROLE_INVALID; 240 conn->sniff_subrating_max_latency = 0xffff; 241 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 242 conn->link_key_type = INVALID_LINK_KEY; 243 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 244 btstack_run_loop_set_timer_context(&conn->timeout, conn); 245 hci_connection_timestamp(conn); 246 #endif 247 conn->acl_recombination_length = 0; 248 conn->acl_recombination_pos = 0; 249 conn->num_packets_sent = 0; 250 251 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 252 #ifdef ENABLE_BLE 253 conn->le_phy_update_all_phys = 0xff; 254 #endif 255 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 256 conn->le_max_tx_octets = 27; 257 #endif 258 #ifdef ENABLE_CLASSIC_PAIRING_OOB 259 conn->classic_oob_c_192 = NULL; 260 conn->classic_oob_r_192 = NULL; 261 conn->classic_oob_c_256 = NULL; 262 conn->classic_oob_r_256 = NULL; 263 #endif 264 } 265 266 /** 267 * create connection for given address 268 * 269 * @return connection OR NULL, if no memory left 270 */ 271 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 272 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 273 274 hci_connection_t * conn = btstack_memory_hci_connection_get(); 275 if (!conn) return NULL; 276 hci_connection_init(conn); 277 278 bd_addr_copy(conn->address, addr); 279 conn->address_type = addr_type; 280 conn->con_handle = HCI_CON_HANDLE_INVALID; 281 conn->role = HCI_ROLE_INVALID; 282 283 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 284 285 return conn; 286 } 287 288 289 /** 290 * get le connection parameter range 291 * 292 * @return le connection parameter range struct 293 */ 294 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 295 *range = hci_stack->le_connection_parameter_range; 296 } 297 298 /** 299 * set le connection parameter range 300 * 301 */ 302 303 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 304 hci_stack->le_connection_parameter_range = *range; 305 } 306 307 /** 308 * @brief Test if connection parameters are inside in existing rage 309 * @param conn_interval_min (unit: 1.25ms) 310 * @param conn_interval_max (unit: 1.25ms) 311 * @param conn_latency 312 * @param supervision_timeout (unit: 10ms) 313 * @return 1 if included 314 */ 315 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 316 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 317 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 318 319 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 320 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 321 322 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 323 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 324 325 return 1; 326 } 327 328 /** 329 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 330 * @note: default: 1 331 * @param max_peripheral_connections 332 */ 333 #ifdef ENABLE_LE_PERIPHERAL 334 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 335 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 336 } 337 #endif 338 339 /** 340 * get hci connections iterator 341 * 342 * @return hci connections iterator 343 */ 344 345 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 346 btstack_linked_list_iterator_init(it, &hci_stack->connections); 347 } 348 349 /** 350 * get connection for a given handle 351 * 352 * @return connection OR NULL, if not found 353 */ 354 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 355 btstack_linked_list_iterator_t it; 356 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 357 while (btstack_linked_list_iterator_has_next(&it)){ 358 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 359 if ( item->con_handle == con_handle ) { 360 return item; 361 } 362 } 363 return NULL; 364 } 365 366 /** 367 * get connection for given address 368 * 369 * @return connection OR NULL, if not found 370 */ 371 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 372 btstack_linked_list_iterator_t it; 373 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 374 while (btstack_linked_list_iterator_has_next(&it)){ 375 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 376 if (connection->address_type != addr_type) continue; 377 if (memcmp(addr, connection->address, 6) != 0) continue; 378 return connection; 379 } 380 return NULL; 381 } 382 383 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 384 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 385 } 386 387 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 388 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 389 } 390 391 #ifdef ENABLE_CLASSIC 392 393 #ifdef ENABLE_SCO_OVER_HCI 394 static int hci_number_sco_connections(void){ 395 int connections = 0; 396 btstack_linked_list_iterator_t it; 397 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 398 while (btstack_linked_list_iterator_has_next(&it)){ 399 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 400 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 401 connections++; 402 } 403 return connections; 404 } 405 #endif 406 407 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 408 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 409 #ifdef HAVE_EMBEDDED_TICK 410 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 411 // connections might be timed out 412 hci_emit_l2cap_check_timeout(connection); 413 } 414 #else 415 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 416 // connections might be timed out 417 hci_emit_l2cap_check_timeout(connection); 418 } 419 #endif 420 } 421 422 static void hci_connection_timestamp(hci_connection_t *connection){ 423 #ifdef HAVE_EMBEDDED_TICK 424 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 425 #else 426 connection->timestamp = btstack_run_loop_get_time_ms(); 427 #endif 428 } 429 430 /** 431 * add authentication flags and reset timer 432 * @note: assumes classic connection 433 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 434 */ 435 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 436 bd_addr_t addr; 437 reverse_bd_addr(bd_addr, addr); 438 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 439 if (conn) { 440 connectionSetAuthenticationFlags(conn, flags); 441 hci_connection_timestamp(conn); 442 } 443 } 444 445 static bool hci_pairing_active(hci_connection_t * hci_connection){ 446 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 447 } 448 449 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 450 if (hci_pairing_active(hci_connection)) return; 451 if (ssp){ 452 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 453 } else { 454 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 455 } 456 // if we are initiator, we have sent an HCI Authenticate Request 457 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 458 459 // if we are responder, use minimal service security level as required level 460 if (!initiator){ 461 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 462 } 463 464 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 465 466 uint8_t event[12]; 467 event[0] = GAP_EVENT_PAIRING_STARTED; 468 event[1] = 10; 469 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 470 reverse_bd_addr(hci_connection->address, &event[4]); 471 event[10] = (uint8_t) ssp; 472 event[11] = (uint8_t) initiator; 473 hci_emit_event(event, sizeof(event), 1); 474 } 475 476 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 477 hci_connection->requested_security_level = LEVEL_0; 478 if (!hci_pairing_active(hci_connection)) return; 479 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 480 #ifdef ENABLE_CLASSIC_PAIRING_OOB 481 hci_connection->classic_oob_c_192 = NULL; 482 hci_connection->classic_oob_r_192 = NULL; 483 hci_connection->classic_oob_c_256 = NULL; 484 hci_connection->classic_oob_r_256 = NULL; 485 #endif 486 log_info("pairing complete, status %02x", status); 487 488 uint8_t event[11]; 489 event[0] = GAP_EVENT_PAIRING_COMPLETE; 490 event[1] = 9; 491 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 492 reverse_bd_addr(hci_connection->address, &event[4]); 493 event[10] = status; 494 hci_emit_event(event, sizeof(event), 1); 495 } 496 497 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 498 hci_connection_t * conn = hci_connection_for_handle(handle); 499 if (!conn) return false; 500 return hci_pairing_active(conn); 501 } 502 503 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 504 if (!hci_stack->link_key_db) return; 505 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 506 hci_stack->link_key_db->delete_link_key(addr); 507 } 508 509 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 510 if (!hci_stack->link_key_db) return; 511 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 512 hci_stack->link_key_db->put_link_key(addr, link_key, type); 513 } 514 515 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 516 if (!hci_stack->link_key_db) return false; 517 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 518 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 519 return result; 520 } 521 522 void gap_delete_all_link_keys(void){ 523 bd_addr_t addr; 524 link_key_t link_key; 525 link_key_type_t type; 526 btstack_link_key_iterator_t it; 527 int ok = gap_link_key_iterator_init(&it); 528 if (!ok) { 529 log_error("could not initialize iterator"); 530 return; 531 } 532 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 533 gap_drop_link_key_for_bd_addr(addr); 534 } 535 gap_link_key_iterator_done(&it); 536 } 537 538 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 539 if (!hci_stack->link_key_db) return 0; 540 if (!hci_stack->link_key_db->iterator_init) return 0; 541 return hci_stack->link_key_db->iterator_init(it); 542 } 543 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 544 if (!hci_stack->link_key_db) return 0; 545 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 546 } 547 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 548 if (!hci_stack->link_key_db) return; 549 hci_stack->link_key_db->iterator_done(it); 550 } 551 #endif 552 553 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 554 switch (address_type){ 555 case BD_ADDR_TYPE_LE_PUBLIC: 556 case BD_ADDR_TYPE_LE_RANDOM: 557 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 558 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 559 return true; 560 default: 561 return false; 562 } 563 } 564 565 static int hci_is_le_connection(hci_connection_t * connection){ 566 return hci_is_le_connection_type(connection->address_type); 567 } 568 569 /** 570 * count connections 571 */ 572 static int nr_hci_connections(void){ 573 int count = 0; 574 btstack_linked_item_t *it; 575 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 576 count++; 577 } 578 return count; 579 } 580 581 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 582 583 unsigned int num_packets_sent_classic = 0; 584 unsigned int num_packets_sent_le = 0; 585 586 btstack_linked_item_t *it; 587 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 588 hci_connection_t * connection = (hci_connection_t *) it; 589 if (hci_is_le_connection(connection)){ 590 num_packets_sent_le += connection->num_packets_sent; 591 } 592 if (connection->address_type == BD_ADDR_TYPE_ACL){ 593 num_packets_sent_classic += connection->num_packets_sent; 594 } 595 } 596 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 597 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 598 int free_slots_le = 0; 599 600 if (free_slots_classic < 0){ 601 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 602 return 0; 603 } 604 605 if (hci_stack->le_acl_packets_total_num){ 606 // if we have LE slots, they are used 607 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 608 if (free_slots_le < 0){ 609 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 610 return 0; 611 } 612 } else { 613 // otherwise, classic slots are used for LE, too 614 free_slots_classic -= num_packets_sent_le; 615 if (free_slots_classic < 0){ 616 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 617 return 0; 618 } 619 } 620 621 switch (address_type){ 622 case BD_ADDR_TYPE_UNKNOWN: 623 log_error("hci_number_free_acl_slots: unknown address type"); 624 return 0; 625 626 case BD_ADDR_TYPE_ACL: 627 return (uint16_t) free_slots_classic; 628 629 default: 630 if (hci_stack->le_acl_packets_total_num > 0){ 631 return (uint16_t) free_slots_le; 632 } 633 return (uint16_t) free_slots_classic; 634 } 635 } 636 637 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 638 // get connection type 639 hci_connection_t * connection = hci_connection_for_handle(con_handle); 640 if (!connection){ 641 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 642 return 0; 643 } 644 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 645 } 646 647 #ifdef ENABLE_CLASSIC 648 static int hci_number_free_sco_slots(void){ 649 unsigned int num_sco_packets_sent = 0; 650 btstack_linked_item_t *it; 651 if (hci_stack->synchronous_flow_control_enabled){ 652 // explicit flow control 653 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 654 hci_connection_t * connection = (hci_connection_t *) it; 655 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 656 num_sco_packets_sent += connection->num_packets_sent; 657 } 658 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 659 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 660 return 0; 661 } 662 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 663 } else { 664 // implicit flow control -- TODO 665 int num_ready = 0; 666 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 667 hci_connection_t * connection = (hci_connection_t *) it; 668 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 669 if (connection->sco_tx_ready == 0) continue; 670 num_ready++; 671 } 672 return num_ready; 673 } 674 } 675 #endif 676 677 // only used to send HCI Host Number Completed Packets 678 static int hci_can_send_comand_packet_transport(void){ 679 if (hci_stack->hci_packet_buffer_reserved) return 0; 680 681 // check for async hci transport implementations 682 if (hci_stack->hci_transport->can_send_packet_now){ 683 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 684 return 0; 685 } 686 } 687 return 1; 688 } 689 690 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 691 bool hci_can_send_command_packet_now(void){ 692 if (hci_can_send_comand_packet_transport() == 0) return false; 693 return hci_stack->num_cmd_packets > 0u; 694 } 695 696 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 697 // check for async hci transport implementations 698 if (!hci_stack->hci_transport->can_send_packet_now) return true; 699 return hci_stack->hci_transport->can_send_packet_now(packet_type); 700 } 701 702 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 703 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 704 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 705 } 706 707 bool hci_can_send_acl_le_packet_now(void){ 708 if (hci_stack->hci_packet_buffer_reserved) return false; 709 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 710 } 711 712 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 713 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 714 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 715 } 716 717 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 718 if (hci_stack->hci_packet_buffer_reserved) return false; 719 return hci_can_send_prepared_acl_packet_now(con_handle); 720 } 721 722 #ifdef ENABLE_CLASSIC 723 bool hci_can_send_acl_classic_packet_now(void){ 724 if (hci_stack->hci_packet_buffer_reserved) return false; 725 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 726 } 727 728 bool hci_can_send_prepared_sco_packet_now(void){ 729 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 730 if (hci_have_usb_transport()){ 731 return hci_stack->sco_can_send_now; 732 } else { 733 return hci_number_free_sco_slots() > 0; 734 } 735 } 736 737 bool hci_can_send_sco_packet_now(void){ 738 if (hci_stack->hci_packet_buffer_reserved) return false; 739 return hci_can_send_prepared_sco_packet_now(); 740 } 741 742 void hci_request_sco_can_send_now_event(void){ 743 hci_stack->sco_waiting_for_can_send_now = 1; 744 hci_notify_if_sco_can_send_now(); 745 } 746 #endif 747 748 // used for internal checks in l2cap.c 749 bool hci_is_packet_buffer_reserved(void){ 750 return hci_stack->hci_packet_buffer_reserved; 751 } 752 753 // reserves outgoing packet buffer. 754 // @return 1 if successful 755 bool hci_reserve_packet_buffer(void){ 756 if (hci_stack->hci_packet_buffer_reserved) { 757 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 758 return false; 759 } 760 hci_stack->hci_packet_buffer_reserved = true; 761 return true; 762 } 763 764 void hci_release_packet_buffer(void){ 765 hci_stack->hci_packet_buffer_reserved = false; 766 } 767 768 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 769 static int hci_transport_synchronous(void){ 770 return hci_stack->hci_transport->can_send_packet_now == NULL; 771 } 772 773 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 774 775 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 776 777 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 778 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 779 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 780 max_acl_data_packet_length = hci_stack->le_data_packets_length; 781 } 782 783 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 784 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 785 max_acl_data_packet_length = connection->le_max_tx_octets; 786 } 787 #endif 788 789 log_debug("hci_send_acl_packet_fragments entered"); 790 791 uint8_t status = ERROR_CODE_SUCCESS; 792 // multiple packets could be send on a synchronous HCI transport 793 while (true){ 794 795 log_debug("hci_send_acl_packet_fragments loop entered"); 796 797 // get current data 798 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 799 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 800 bool more_fragments = false; 801 802 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 803 if (current_acl_data_packet_length > max_acl_data_packet_length){ 804 more_fragments = true; 805 current_acl_data_packet_length = max_acl_data_packet_length; 806 } 807 808 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 809 if (acl_header_pos > 0u){ 810 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 811 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 812 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 813 } 814 815 // update header len 816 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 817 818 // count packet 819 connection->num_packets_sent++; 820 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 821 822 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 823 if (more_fragments){ 824 // update start of next fragment to send 825 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 826 } else { 827 // done 828 hci_stack->acl_fragmentation_pos = 0; 829 hci_stack->acl_fragmentation_total_size = 0; 830 } 831 832 // send packet 833 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 834 const int size = current_acl_data_packet_length + 4; 835 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 836 hci_stack->acl_fragmentation_tx_active = 1; 837 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 838 if (err != 0){ 839 // no error from HCI Transport expected 840 status = ERROR_CODE_HARDWARE_FAILURE; 841 } 842 843 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 844 845 // done yet? 846 if (!more_fragments) break; 847 848 // can send more? 849 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 850 } 851 852 log_debug("hci_send_acl_packet_fragments loop over"); 853 854 // release buffer now for synchronous transport 855 if (hci_transport_synchronous()){ 856 hci_stack->acl_fragmentation_tx_active = 0; 857 hci_release_packet_buffer(); 858 hci_emit_transport_packet_sent(); 859 } 860 861 return status; 862 } 863 864 // pre: caller has reserved the packet buffer 865 uint8_t hci_send_acl_packet_buffer(int size){ 866 btstack_assert(hci_stack->hci_packet_buffer_reserved); 867 868 uint8_t * packet = hci_stack->hci_packet_buffer; 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 873 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 hci_connection_t *connection = hci_connection_for_handle( con_handle); 880 if (!connection) { 881 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 882 hci_release_packet_buffer(); 883 hci_emit_transport_packet_sent(); 884 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 885 } 886 887 #ifdef ENABLE_CLASSIC 888 hci_connection_timestamp(connection); 889 #endif 890 891 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 892 893 // setup data 894 hci_stack->acl_fragmentation_total_size = size; 895 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 896 897 return hci_send_acl_packet_fragments(connection); 898 } 899 900 #ifdef ENABLE_CLASSIC 901 // pre: caller has reserved the packet buffer 902 uint8_t hci_send_sco_packet_buffer(int size){ 903 btstack_assert(hci_stack->hci_packet_buffer_reserved); 904 905 uint8_t * packet = hci_stack->hci_packet_buffer; 906 907 // skip checks in loopback mode 908 if (!hci_stack->loopback_mode){ 909 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 910 911 // check for free places on Bluetooth module 912 if (!hci_can_send_prepared_sco_packet_now()) { 913 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 914 hci_release_packet_buffer(); 915 hci_emit_transport_packet_sent(); 916 return BTSTACK_ACL_BUFFERS_FULL; 917 } 918 919 // track send packet in connection struct 920 hci_connection_t *connection = hci_connection_for_handle( con_handle); 921 if (!connection) { 922 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 923 hci_release_packet_buffer(); 924 hci_emit_transport_packet_sent(); 925 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 926 } 927 928 if (hci_have_usb_transport()){ 929 // token used 930 hci_stack->sco_can_send_now = false; 931 } else { 932 if (hci_stack->synchronous_flow_control_enabled){ 933 connection->num_packets_sent++; 934 } else { 935 connection->sco_tx_ready--; 936 } 937 } 938 } 939 940 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 941 942 #ifdef HAVE_SCO_TRANSPORT 943 hci_stack->sco_transport->send_packet(packet, size); 944 hci_release_packet_buffer(); 945 hci_emit_transport_packet_sent(); 946 947 return 0; 948 #else 949 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 950 if (hci_transport_synchronous()){ 951 hci_release_packet_buffer(); 952 hci_emit_transport_packet_sent(); 953 } 954 955 if (err != 0){ 956 return ERROR_CODE_HARDWARE_FAILURE; 957 } 958 return ERROR_CODE_SUCCESS; 959 #endif 960 } 961 #endif 962 963 static void acl_handler(uint8_t *packet, uint16_t size){ 964 965 // get info 966 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 967 hci_connection_t *conn = hci_connection_for_handle(con_handle); 968 uint8_t acl_flags = READ_ACL_FLAGS(packet); 969 uint16_t acl_length = READ_ACL_LENGTH(packet); 970 971 // ignore non-registered handle 972 if (!conn){ 973 log_error("acl_handler called with non-registered handle %u!" , con_handle); 974 return; 975 } 976 977 // assert packet is complete 978 if ((acl_length + 4u) != size){ 979 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 980 return; 981 } 982 983 #ifdef ENABLE_CLASSIC 984 // update idle timestamp 985 hci_connection_timestamp(conn); 986 #endif 987 988 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 989 hci_stack->host_completed_packets = 1; 990 conn->num_packets_completed++; 991 #endif 992 993 // handle different packet types 994 switch (acl_flags & 0x03u) { 995 996 case 0x01: // continuation fragment 997 998 // sanity checks 999 if (conn->acl_recombination_pos == 0u) { 1000 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1001 return; 1002 } 1003 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1004 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1005 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1006 conn->acl_recombination_pos = 0; 1007 return; 1008 } 1009 1010 // append fragment payload (header already stored) 1011 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1012 &packet[4], acl_length); 1013 conn->acl_recombination_pos += acl_length; 1014 1015 // forward complete L2CAP packet if complete. 1016 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1017 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1018 // reset recombination buffer 1019 conn->acl_recombination_length = 0; 1020 conn->acl_recombination_pos = 0; 1021 } 1022 break; 1023 1024 case 0x02: { // first fragment 1025 1026 // sanity check 1027 if (conn->acl_recombination_pos) { 1028 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1029 conn->acl_recombination_pos = 0; 1030 } 1031 1032 // peek into L2CAP packet! 1033 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1034 1035 // compare fragment size to L2CAP packet size 1036 if (acl_length >= (l2cap_length + 4u)){ 1037 // forward fragment as L2CAP packet 1038 hci_emit_acl_packet(packet, acl_length + 4u); 1039 } else { 1040 1041 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1042 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1043 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1044 return; 1045 } 1046 1047 // store first fragment and tweak acl length for complete package 1048 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1049 packet, acl_length + 4u); 1050 conn->acl_recombination_pos = acl_length + 4u; 1051 conn->acl_recombination_length = l2cap_length; 1052 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1053 } 1054 break; 1055 1056 } 1057 default: 1058 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1059 return; 1060 } 1061 1062 // execute main loop 1063 hci_run(); 1064 } 1065 1066 static void hci_connection_stop_timer(hci_connection_t * conn){ 1067 btstack_run_loop_remove_timer(&conn->timeout); 1068 #ifdef ENABLE_CLASSIC 1069 btstack_run_loop_remove_timer(&conn->timeout_sco); 1070 #endif 1071 } 1072 1073 static void hci_shutdown_connection(hci_connection_t *conn){ 1074 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1075 1076 #ifdef ENABLE_CLASSIC 1077 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1078 bd_addr_type_t addr_type = conn->address_type; 1079 #endif 1080 #ifdef HAVE_SCO_TRANSPORT 1081 hci_con_handle_t con_handle = conn->con_handle; 1082 #endif 1083 #endif 1084 1085 hci_connection_stop_timer(conn); 1086 1087 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1088 btstack_memory_hci_connection_free( conn ); 1089 1090 // now it's gone 1091 hci_emit_nr_connections_changed(); 1092 1093 #ifdef ENABLE_CLASSIC 1094 #ifdef ENABLE_SCO_OVER_HCI 1095 // update SCO 1096 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1097 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1098 } 1099 #endif 1100 #ifdef HAVE_SCO_TRANSPORT 1101 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1102 hci_stack->sco_transport->close(con_handle); 1103 } 1104 #endif 1105 #endif 1106 } 1107 1108 #ifdef ENABLE_CLASSIC 1109 1110 static const uint16_t packet_type_sizes[] = { 1111 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1112 HCI_ACL_DH1_SIZE, 0, 0, 0, 1113 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1114 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1115 }; 1116 static const uint8_t packet_type_feature_requirement_bit[] = { 1117 0, // 3 slot packets 1118 1, // 5 slot packets 1119 25, // EDR 2 mpbs 1120 26, // EDR 3 mbps 1121 39, // 3 slot EDR packts 1122 40, // 5 slot EDR packet 1123 }; 1124 static const uint16_t packet_type_feature_packet_mask[] = { 1125 0x0f00, // 3 slot packets 1126 0xf000, // 5 slot packets 1127 0x1102, // EDR 2 mpbs 1128 0x2204, // EDR 3 mbps 1129 0x0300, // 3 slot EDR packts 1130 0x3000, // 5 slot EDR packet 1131 }; 1132 1133 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1134 // enable packet types based on size 1135 uint16_t packet_types = 0; 1136 unsigned int i; 1137 for (i=0;i<16;i++){ 1138 if (packet_type_sizes[i] == 0) continue; 1139 if (packet_type_sizes[i] <= buffer_size){ 1140 packet_types |= 1 << i; 1141 } 1142 } 1143 // disable packet types due to missing local supported features 1144 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1145 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1146 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1147 if (feature_set) continue; 1148 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1149 packet_types &= ~packet_type_feature_packet_mask[i]; 1150 } 1151 // flip bits for "may not be used" 1152 packet_types ^= 0x3306; 1153 return packet_types; 1154 } 1155 1156 uint16_t hci_usable_acl_packet_types(void){ 1157 return hci_stack->packet_types; 1158 } 1159 #endif 1160 1161 uint8_t* hci_get_outgoing_packet_buffer(void){ 1162 // hci packet buffer is >= acl data packet length 1163 return hci_stack->hci_packet_buffer; 1164 } 1165 1166 uint16_t hci_max_acl_data_packet_length(void){ 1167 return hci_stack->acl_data_packet_length; 1168 } 1169 1170 #ifdef ENABLE_CLASSIC 1171 bool hci_extended_sco_link_supported(void){ 1172 // No. 31, byte 3, bit 7 1173 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1174 } 1175 #endif 1176 1177 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1178 // No. 54, byte 6, bit 6 1179 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1180 } 1181 1182 #ifdef ENABLE_CLASSIC 1183 static int gap_ssp_supported(void){ 1184 // No. 51, byte 6, bit 3 1185 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1186 } 1187 #endif 1188 1189 static int hci_classic_supported(void){ 1190 #ifdef ENABLE_CLASSIC 1191 // No. 37, byte 4, bit 5, = No BR/EDR Support 1192 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1193 #else 1194 return 0; 1195 #endif 1196 } 1197 1198 static int hci_le_supported(void){ 1199 #ifdef ENABLE_BLE 1200 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1201 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1202 #else 1203 return 0; 1204 #endif 1205 } 1206 1207 static bool hci_command_supported(uint8_t command_index){ 1208 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1209 } 1210 1211 #ifdef ENABLE_BLE 1212 1213 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1214 static bool hci_extended_advertising_supported(void){ 1215 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1216 } 1217 #endif 1218 1219 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1220 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1221 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1222 } else { 1223 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1224 } 1225 } 1226 1227 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1228 *addr_type = hci_stack->le_own_addr_type; 1229 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1230 } 1231 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1234 *addr_type = hci_stack->le_advertisements_own_addr_type; 1235 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1236 }; 1237 #endif 1238 1239 #ifdef ENABLE_LE_CENTRAL 1240 1241 /** 1242 * @brief Get own addr type and address used for LE connections (Central) 1243 */ 1244 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1245 *addr_type = hci_stack->le_connection_own_addr_type; 1246 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1247 } 1248 1249 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1250 1251 uint16_t offset = 3; 1252 uint8_t num_reports = packet[offset]; 1253 offset += 1; 1254 1255 uint16_t i; 1256 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1257 for (i=0; (i<num_reports) && (offset < size);i++){ 1258 // sanity checks on data_length: 1259 uint8_t data_length = packet[offset + 8]; 1260 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1261 if ((offset + 9u + data_length + 1u) > size) return; 1262 // setup event 1263 uint8_t event_size = 10u + data_length; 1264 uint16_t pos = 0; 1265 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1266 event[pos++] = event_size; 1267 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1268 offset += 8; 1269 pos += 8; 1270 event[pos++] = packet[offset + 1 + data_length]; // rssi 1271 event[pos++] = data_length; 1272 offset++; 1273 (void)memcpy(&event[pos], &packet[offset], data_length); 1274 pos += data_length; 1275 offset += data_length + 1u; // rssi 1276 hci_emit_event(event, pos, 1); 1277 } 1278 } 1279 1280 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1281 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1282 uint16_t offset = 3; 1283 uint8_t num_reports = packet[offset++]; 1284 1285 uint8_t i; 1286 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1287 for (i=0; (i<num_reports) && (offset < size);i++){ 1288 // sanity checks on data_length: 1289 uint16_t data_length = packet[offset + 23]; 1290 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1291 if ((offset + 24u + data_length) > size) return; 1292 uint16_t event_type = little_endian_read_16(packet, offset); 1293 offset += 2; 1294 if ((event_type & 0x10) != 0) { 1295 // setup legacy event 1296 uint8_t legacy_event_type; 1297 switch (event_type){ 1298 case 0b0010011: 1299 // ADV_IND 1300 legacy_event_type = 0; 1301 break; 1302 case 0b0010101: 1303 // ADV_DIRECT_IND 1304 legacy_event_type = 1; 1305 break; 1306 case 0b0010010: 1307 // ADV_SCAN_IND 1308 legacy_event_type = 2; 1309 break; 1310 case 0b0010000: 1311 // ADV_NONCONN_IND 1312 legacy_event_type = 3; 1313 break; 1314 case 0b0011011: 1315 case 0b0011010: 1316 // SCAN_RSP 1317 legacy_event_type = 4; 1318 break; 1319 default: 1320 legacy_event_type = 0; 1321 break; 1322 } 1323 uint16_t pos = 0; 1324 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1325 event[pos++] = 10u + data_length; 1326 event[pos++] = legacy_event_type; 1327 // copy address type + address 1328 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1329 offset += 7; 1330 pos += 7; 1331 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1332 offset += 4; 1333 // copy rssi 1334 event[pos++] = packet[offset++]; 1335 // skip periodic advertising interval and direct address 1336 offset += 9; 1337 // copy data len + data; 1338 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1339 pos += 1 +data_length; 1340 offset += 1+ data_length; 1341 hci_emit_event(event, pos, 1); 1342 } else { 1343 // TODO: process new events 1344 } 1345 } 1346 } 1347 #endif 1348 1349 #endif 1350 #endif 1351 1352 #ifdef ENABLE_BLE 1353 #ifdef ENABLE_LE_PERIPHERAL 1354 static void hci_update_advertisements_enabled_for_current_roles(void){ 1355 if (hci_stack->le_advertisements_enabled){ 1356 // get number of active le slave connections 1357 int num_slave_connections = 0; 1358 btstack_linked_list_iterator_t it; 1359 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1360 while (btstack_linked_list_iterator_has_next(&it)){ 1361 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1362 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1363 if (con->state != OPEN) continue; 1364 if (con->role != HCI_ROLE_SLAVE) continue; 1365 if (!hci_is_le_connection(con)) continue; 1366 num_slave_connections++; 1367 } 1368 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1369 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1370 } else { 1371 hci_stack->le_advertisements_enabled_for_current_roles = false; 1372 } 1373 } 1374 #endif 1375 #endif 1376 1377 #ifdef ENABLE_CLASSIC 1378 static void gap_run_set_local_name(void){ 1379 hci_reserve_packet_buffer(); 1380 uint8_t * packet = hci_stack->hci_packet_buffer; 1381 // construct HCI Command and send 1382 uint16_t opcode = hci_write_local_name.opcode; 1383 hci_stack->last_cmd_opcode = opcode; 1384 packet[0] = opcode & 0xff; 1385 packet[1] = opcode >> 8; 1386 packet[2] = DEVICE_NAME_LEN; 1387 memset(&packet[3], 0, DEVICE_NAME_LEN); 1388 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1389 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1390 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1391 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1392 // expand '00:00:00:00:00:00' in name with bd_addr 1393 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1394 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1395 } 1396 1397 static void gap_run_set_eir_data(void){ 1398 hci_reserve_packet_buffer(); 1399 uint8_t * packet = hci_stack->hci_packet_buffer; 1400 // construct HCI Command in-place and send 1401 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1402 hci_stack->last_cmd_opcode = opcode; 1403 uint16_t offset = 0; 1404 packet[offset++] = opcode & 0xff; 1405 packet[offset++] = opcode >> 8; 1406 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1407 packet[offset++] = 0; // FEC not required 1408 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1409 if (hci_stack->eir_data){ 1410 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1411 ad_context_t context; 1412 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1413 uint8_t data_type = ad_iterator_get_data_type(&context); 1414 uint8_t size = ad_iterator_get_data_len(&context); 1415 const uint8_t *data = ad_iterator_get_data(&context); 1416 // copy item 1417 packet[offset++] = size + 1; 1418 packet[offset++] = data_type; 1419 memcpy(&packet[offset], data, size); 1420 // update name item 1421 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1422 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1423 } 1424 offset += size; 1425 } 1426 } else { 1427 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1428 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1429 packet[offset++] = bytes_to_copy + 1; 1430 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1431 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1432 // expand '00:00:00:00:00:00' in name with bd_addr 1433 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1434 } 1435 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1436 } 1437 1438 static void hci_run_gap_tasks_classic(void){ 1439 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1440 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1441 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1442 return; 1443 } 1444 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1445 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1446 gap_run_set_local_name(); 1447 return; 1448 } 1449 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1450 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1451 gap_run_set_eir_data(); 1452 return; 1453 } 1454 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1455 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1456 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1457 return; 1458 } 1459 // write page scan activity 1460 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1461 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1462 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1463 return; 1464 } 1465 // write page scan type 1466 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1467 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1468 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1469 return; 1470 } 1471 // write page timeout 1472 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1473 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1474 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1475 return; 1476 } 1477 // send scan enable 1478 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1479 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1480 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1481 return; 1482 } 1483 // send write scan activity 1484 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1485 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1486 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1487 return; 1488 } 1489 } 1490 #endif 1491 1492 #ifndef HAVE_HOST_CONTROLLER_API 1493 1494 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1495 if (!hci_stack->config) return 0; 1496 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1497 // Limit baud rate for Broadcom chipsets to 3 mbps 1498 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1499 baud_rate = 3000000; 1500 } 1501 return baud_rate; 1502 } 1503 1504 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1505 UNUSED(ds); 1506 1507 switch (hci_stack->substate){ 1508 case HCI_INIT_W4_SEND_RESET: 1509 log_info("Resend HCI Reset"); 1510 hci_stack->substate = HCI_INIT_SEND_RESET; 1511 hci_stack->num_cmd_packets = 1; 1512 hci_run(); 1513 break; 1514 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1515 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1516 if (hci_stack->hci_transport->reset_link){ 1517 hci_stack->hci_transport->reset_link(); 1518 } 1519 1520 /* fall through */ 1521 1522 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1523 log_info("Resend HCI Reset - CSR Warm Boot"); 1524 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1525 hci_stack->num_cmd_packets = 1; 1526 hci_run(); 1527 break; 1528 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1529 if (hci_stack->hci_transport->set_baudrate){ 1530 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1531 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1532 hci_stack->hci_transport->set_baudrate(baud_rate); 1533 } 1534 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1535 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1536 if (hci_stack->hci_transport->reset_link){ 1537 log_info("Link Reset"); 1538 hci_stack->hci_transport->reset_link(); 1539 } 1540 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1541 hci_run(); 1542 } 1543 break; 1544 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1545 // otherwise continue 1546 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1547 hci_send_cmd(&hci_read_local_supported_commands); 1548 break; 1549 default: 1550 break; 1551 } 1552 } 1553 #endif 1554 1555 static void hci_initializing_next_state(void){ 1556 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1557 } 1558 1559 static void hci_init_done(void){ 1560 // done. tell the app 1561 log_info("hci_init_done -> HCI_STATE_WORKING"); 1562 hci_stack->state = HCI_STATE_WORKING; 1563 hci_emit_state(); 1564 } 1565 1566 // assumption: hci_can_send_command_packet_now() == true 1567 static void hci_initializing_run(void){ 1568 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1569 1570 if (!hci_can_send_command_packet_now()) return; 1571 1572 #ifndef HAVE_HOST_CONTROLLER_API 1573 bool need_baud_change = hci_stack->config 1574 && hci_stack->chipset 1575 && hci_stack->chipset->set_baudrate_command 1576 && hci_stack->hci_transport->set_baudrate 1577 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1578 #endif 1579 1580 switch (hci_stack->substate){ 1581 case HCI_INIT_SEND_RESET: 1582 hci_state_reset(); 1583 1584 #ifndef HAVE_HOST_CONTROLLER_API 1585 // prepare reset if command complete not received in 100ms 1586 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1587 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1588 btstack_run_loop_add_timer(&hci_stack->timeout); 1589 #endif 1590 // send command 1591 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1592 hci_send_cmd(&hci_reset); 1593 break; 1594 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1595 hci_send_cmd(&hci_read_local_version_information); 1596 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1597 break; 1598 1599 #ifndef HAVE_HOST_CONTROLLER_API 1600 case HCI_INIT_SEND_READ_LOCAL_NAME: 1601 hci_send_cmd(&hci_read_local_name); 1602 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1603 break; 1604 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1605 hci_state_reset(); 1606 // prepare reset if command complete not received in 100ms 1607 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1608 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1609 btstack_run_loop_add_timer(&hci_stack->timeout); 1610 // send command 1611 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1612 hci_send_cmd(&hci_reset); 1613 break; 1614 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1615 hci_state_reset(); 1616 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1617 hci_send_cmd(&hci_reset); 1618 break; 1619 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1620 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1621 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1622 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1623 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1624 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1625 break; 1626 } 1627 case HCI_INIT_SET_BD_ADDR: 1628 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1629 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1630 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1631 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1632 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1633 break; 1634 case HCI_INIT_SEND_BAUD_CHANGE: 1635 if (need_baud_change) { 1636 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1637 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1638 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1639 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1640 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1641 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1642 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1643 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1644 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1645 btstack_run_loop_add_timer(&hci_stack->timeout); 1646 } 1647 break; 1648 } 1649 1650 /* fall through */ 1651 1652 case HCI_INIT_CUSTOM_INIT: 1653 // Custom initialization 1654 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1655 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1656 bool send_cmd = false; 1657 switch (hci_stack->chipset_result){ 1658 case BTSTACK_CHIPSET_VALID_COMMAND: 1659 send_cmd = true; 1660 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1661 break; 1662 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1663 send_cmd = true; 1664 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1665 log_info("CSR Warm Boot"); 1666 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1667 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1668 btstack_run_loop_add_timer(&hci_stack->timeout); 1669 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1670 && hci_stack->config 1671 && hci_stack->chipset 1672 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1673 && hci_stack->hci_transport->set_baudrate 1674 && hci_transport_uart_get_main_baud_rate()){ 1675 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1676 } else { 1677 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1678 } 1679 break; 1680 default: 1681 break; 1682 } 1683 1684 if (send_cmd){ 1685 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1686 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1687 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1688 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1689 break; 1690 } 1691 log_info("Init script done"); 1692 1693 // Init script download on Broadcom chipsets causes: 1694 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1695 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1696 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1697 1698 // - baud rate to reset, restore UART baud rate if needed 1699 if (need_baud_change) { 1700 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1701 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1702 hci_stack->hci_transport->set_baudrate(baud_rate); 1703 } 1704 1705 uint16_t bcm_delay_ms = 300; 1706 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1707 // -> Work around: wait here. 1708 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1709 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1710 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1711 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1712 btstack_run_loop_add_timer(&hci_stack->timeout); 1713 break; 1714 } 1715 } 1716 #endif 1717 /* fall through */ 1718 1719 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1720 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1721 hci_send_cmd(&hci_read_local_supported_commands); 1722 break; 1723 case HCI_INIT_READ_BD_ADDR: 1724 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1725 hci_send_cmd(&hci_read_bd_addr); 1726 break; 1727 case HCI_INIT_READ_BUFFER_SIZE: 1728 // only read buffer size if supported 1729 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1730 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1731 hci_send_cmd(&hci_read_buffer_size); 1732 break; 1733 } 1734 1735 /* fall through */ 1736 1737 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1738 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1739 hci_send_cmd(&hci_read_local_supported_features); 1740 break; 1741 1742 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1743 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1744 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1745 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1746 break; 1747 case HCI_INIT_HOST_BUFFER_SIZE: 1748 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1749 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1750 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1751 break; 1752 #endif 1753 1754 case HCI_INIT_SET_EVENT_MASK: 1755 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1756 if (hci_le_supported()){ 1757 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1758 } else { 1759 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1760 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1761 } 1762 break; 1763 1764 #ifdef ENABLE_CLASSIC 1765 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1766 if (hci_classic_supported() && gap_ssp_supported()){ 1767 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1768 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1769 break; 1770 } 1771 1772 /* fall through */ 1773 1774 case HCI_INIT_WRITE_INQUIRY_MODE: 1775 if (hci_classic_supported()){ 1776 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1777 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1778 break; 1779 } 1780 1781 /* fall through */ 1782 1783 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1784 // skip write secure connections host support if not supported or disabled 1785 if (hci_classic_supported() && hci_stack->secure_connections_enable 1786 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1787 hci_stack->secure_connections_active = true; 1788 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1789 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1790 break; 1791 } 1792 1793 #ifdef ENABLE_SCO_OVER_HCI 1794 /* fall through */ 1795 1796 // only sent if ENABLE_SCO_OVER_HCI is defined 1797 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1798 // skip write synchronous flow control if not supported 1799 if (hci_classic_supported() 1800 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1801 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1802 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1803 break; 1804 } 1805 /* fall through */ 1806 1807 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1808 // skip write default erroneous data reporting if not supported 1809 if (hci_classic_supported() 1810 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1811 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1812 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1813 break; 1814 } 1815 #endif 1816 1817 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1818 /* fall through */ 1819 1820 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1821 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1822 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1823 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1824 #ifdef ENABLE_SCO_OVER_HCI 1825 log_info("BCM: Route SCO data via HCI transport"); 1826 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1827 #endif 1828 #ifdef ENABLE_SCO_OVER_PCM 1829 log_info("BCM: Route SCO data via PCM interface"); 1830 #ifdef ENABLE_BCM_PCM_WBS 1831 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1832 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1833 #else 1834 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1835 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1836 #endif 1837 #endif 1838 break; 1839 } 1840 #endif 1841 1842 #ifdef ENABLE_SCO_OVER_PCM 1843 /* fall through */ 1844 1845 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1846 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1847 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1848 log_info("BCM: Config PCM interface for I2S"); 1849 #ifdef ENABLE_BCM_PCM_WBS 1850 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1851 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1852 #else 1853 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1854 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1855 #endif 1856 break; 1857 } 1858 #endif 1859 #endif 1860 1861 #ifdef ENABLE_BLE 1862 /* fall through */ 1863 1864 // LE INIT 1865 case HCI_INIT_LE_READ_BUFFER_SIZE: 1866 if (hci_le_supported()){ 1867 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1868 hci_send_cmd(&hci_le_read_buffer_size); 1869 break; 1870 } 1871 1872 /* fall through */ 1873 1874 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1875 // skip write le host if not supported (e.g. on LE only EM9301) 1876 if (hci_le_supported() 1877 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1878 // LE Supported Host = 1, Simultaneous Host = 0 1879 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1880 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1881 break; 1882 } 1883 1884 /* fall through */ 1885 1886 case HCI_INIT_LE_SET_EVENT_MASK: 1887 if (hci_le_supported()){ 1888 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1889 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1890 break; 1891 } 1892 #endif 1893 1894 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1895 /* fall through */ 1896 1897 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1898 if (hci_le_supported() 1899 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1900 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1901 hci_send_cmd(&hci_le_read_maximum_data_length); 1902 break; 1903 } 1904 1905 /* fall through */ 1906 1907 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1908 if (hci_le_supported() 1909 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1910 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1911 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1912 break; 1913 } 1914 #endif 1915 1916 #ifdef ENABLE_LE_CENTRAL 1917 /* fall through */ 1918 1919 case HCI_INIT_READ_WHITE_LIST_SIZE: 1920 if (hci_le_supported()){ 1921 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1922 hci_send_cmd(&hci_le_read_white_list_size); 1923 break; 1924 } 1925 1926 #endif 1927 1928 /* fall through */ 1929 1930 case HCI_INIT_DONE: 1931 hci_stack->substate = HCI_INIT_DONE; 1932 // main init sequence complete 1933 #ifdef ENABLE_CLASSIC 1934 // check if initial Classic GAP Tasks are completed 1935 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1936 hci_run_gap_tasks_classic(); 1937 break; 1938 } 1939 #endif 1940 #ifdef ENABLE_BLE 1941 #ifdef ENABLE_LE_CENTRAL 1942 // check if initial LE GAP Tasks are completed 1943 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1944 hci_run_general_gap_le(); 1945 break; 1946 } 1947 #endif 1948 #endif 1949 hci_init_done(); 1950 break; 1951 1952 default: 1953 return; 1954 } 1955 } 1956 1957 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1958 bool command_completed = false; 1959 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1960 uint16_t opcode = little_endian_read_16(packet,3); 1961 if (opcode == hci_stack->last_cmd_opcode){ 1962 command_completed = true; 1963 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1964 } else { 1965 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1966 } 1967 } 1968 1969 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1970 uint8_t status = packet[2]; 1971 uint16_t opcode = little_endian_read_16(packet,4); 1972 if (opcode == hci_stack->last_cmd_opcode){ 1973 if (status){ 1974 command_completed = true; 1975 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1976 } else { 1977 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1978 } 1979 } else { 1980 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1981 } 1982 } 1983 #ifndef HAVE_HOST_CONTROLLER_API 1984 // Vendor == CSR 1985 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1986 // TODO: track actual command 1987 command_completed = true; 1988 } 1989 1990 // Vendor == Toshiba 1991 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1992 // TODO: track actual command 1993 command_completed = true; 1994 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1995 hci_stack->num_cmd_packets = 1; 1996 } 1997 #endif 1998 1999 return command_completed; 2000 } 2001 2002 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2003 2004 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2005 2006 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2007 2008 #ifndef HAVE_HOST_CONTROLLER_API 2009 2010 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2011 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2012 // 2013 // HCI Reset 2014 // Timeout 100 ms 2015 // HCI Reset 2016 // Command Complete Reset 2017 // HCI Read Local Version Information 2018 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2019 // hang... 2020 // 2021 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2022 if (!command_completed 2023 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2024 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2025 2026 uint16_t opcode = little_endian_read_16(packet,3); 2027 if (opcode == hci_reset.opcode){ 2028 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2029 return; 2030 } 2031 } 2032 2033 // CSR & H5 2034 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2035 if (!command_completed 2036 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2037 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2038 2039 uint16_t opcode = little_endian_read_16(packet,3); 2040 if (opcode == hci_reset.opcode){ 2041 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2042 return; 2043 } 2044 } 2045 2046 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2047 // fix: Correct substate and behave as command below 2048 if (command_completed){ 2049 switch (hci_stack->substate){ 2050 case HCI_INIT_SEND_RESET: 2051 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2052 break; 2053 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2054 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2055 break; 2056 default: 2057 break; 2058 } 2059 } 2060 2061 #endif 2062 2063 if (!command_completed) return; 2064 2065 bool need_baud_change = false; 2066 bool need_addr_change = false; 2067 2068 #ifndef HAVE_HOST_CONTROLLER_API 2069 need_baud_change = hci_stack->config 2070 && hci_stack->chipset 2071 && hci_stack->chipset->set_baudrate_command 2072 && hci_stack->hci_transport->set_baudrate 2073 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2074 2075 need_addr_change = hci_stack->custom_bd_addr_set 2076 && hci_stack->chipset 2077 && hci_stack->chipset->set_bd_addr_command; 2078 #endif 2079 2080 switch(hci_stack->substate){ 2081 2082 #ifndef HAVE_HOST_CONTROLLER_API 2083 case HCI_INIT_SEND_RESET: 2084 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2085 // fix: just correct substate and behave as command below 2086 2087 /* fall through */ 2088 #endif 2089 2090 case HCI_INIT_W4_SEND_RESET: 2091 btstack_run_loop_remove_timer(&hci_stack->timeout); 2092 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2093 return; 2094 2095 #ifndef HAVE_HOST_CONTROLLER_API 2096 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2097 // for STLC2500D, baud rate change already happened. 2098 // for others, baud rate gets changed now 2099 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2100 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2101 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2102 hci_stack->hci_transport->set_baudrate(baud_rate); 2103 } 2104 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2105 return; 2106 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2107 btstack_run_loop_remove_timer(&hci_stack->timeout); 2108 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2109 return; 2110 case HCI_INIT_W4_CUSTOM_INIT: 2111 // repeat custom init 2112 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2113 return; 2114 #endif 2115 2116 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2117 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2118 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2119 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2120 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2121 return; 2122 } 2123 if (need_addr_change){ 2124 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2125 return; 2126 } 2127 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2128 return; 2129 #ifndef HAVE_HOST_CONTROLLER_API 2130 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2131 if (need_baud_change){ 2132 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2133 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2134 hci_stack->hci_transport->set_baudrate(baud_rate); 2135 } 2136 if (need_addr_change){ 2137 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2138 return; 2139 } 2140 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2141 return; 2142 case HCI_INIT_W4_SET_BD_ADDR: 2143 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2144 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2145 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2146 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2147 return; 2148 } 2149 // skipping st warm boot 2150 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2151 return; 2152 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2153 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2154 return; 2155 #endif 2156 2157 case HCI_INIT_DONE: 2158 // set state if we came here by fall through 2159 hci_stack->substate = HCI_INIT_DONE; 2160 return; 2161 2162 default: 2163 break; 2164 } 2165 hci_initializing_next_state(); 2166 } 2167 2168 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2169 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2170 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2171 // check if the hci connection has been outgoing 2172 switch (conn->state){ 2173 case SEND_CREATE_CONNECTION: 2174 case RECEIVED_CONNECTION_REQUEST: 2175 break; 2176 default: 2177 return; 2178 } 2179 2180 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2181 bd_addr_t bd_address; 2182 (void)memcpy(&bd_address, conn->address, 6); 2183 2184 #ifdef ENABLE_CLASSIC 2185 // cache needed data 2186 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2187 #endif 2188 2189 // connection failed, remove entry 2190 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2191 btstack_memory_hci_connection_free( conn ); 2192 2193 #ifdef ENABLE_CLASSIC 2194 // notify client if dedicated bonding 2195 if (notify_dedicated_bonding_failed){ 2196 log_info("hci notify_dedicated_bonding_failed"); 2197 hci_emit_dedicated_bonding_result(bd_address, status); 2198 } 2199 2200 // if authentication error, also delete link key 2201 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2202 gap_drop_link_key_for_bd_addr(bd_address); 2203 } 2204 #else 2205 UNUSED(status); 2206 #endif 2207 } 2208 2209 #ifdef ENABLE_CLASSIC 2210 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2211 // SSP Controller 2212 if (features[6] & (1 << 3)){ 2213 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2214 } 2215 // eSCO 2216 if (features[3] & (1<<7)){ 2217 conn->remote_supported_features[0] |= 1; 2218 } 2219 // Extended features 2220 if (features[7] & (1<<7)){ 2221 conn->remote_supported_features[0] |= 2; 2222 } 2223 } 2224 2225 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2226 // SSP Host 2227 if (features[0] & (1 << 0)){ 2228 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2229 } 2230 // SC Host 2231 if (features[0] & (1 << 3)){ 2232 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2233 } 2234 } 2235 2236 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2237 // SC Controller 2238 if (features[1] & (1 << 0)){ 2239 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2240 } 2241 } 2242 2243 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2244 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2245 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2246 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2247 if (conn->bonding_flags & BONDING_DEDICATED){ 2248 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2249 } 2250 } 2251 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2252 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2253 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2254 } 2255 2256 #endif 2257 2258 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2259 // handle BT initialization 2260 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2261 hci_initializing_event_handler(packet, size); 2262 } 2263 2264 // help with BT sleep 2265 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2266 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2267 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2268 hci_initializing_next_state(); 2269 } 2270 } 2271 2272 #ifdef ENABLE_CLASSIC 2273 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2274 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2275 conn->encryption_key_size = encryption_key_size; 2276 2277 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2278 conn->requested_security_level = LEVEL_0; 2279 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2280 return; 2281 } 2282 2283 // Request remote features if not already done 2284 hci_trigger_remote_features_for_connection(conn); 2285 2286 // Request Authentication if not already done 2287 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2288 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2289 } 2290 #endif 2291 2292 static void hci_store_local_supported_commands(const uint8_t * packet){ 2293 // create mapping table 2294 #define X(name, offset, bit) { offset, bit }, 2295 static struct { 2296 uint8_t byte_offset; 2297 uint8_t bit_position; 2298 } supported_hci_commands_map [] = { 2299 SUPPORTED_HCI_COMMANDS 2300 }; 2301 #undef X 2302 2303 // create names for debug purposes 2304 #ifdef ENABLE_LOG_DEBUG 2305 #define X(name, offset, bit) #name, 2306 static const char * command_names[] = { 2307 SUPPORTED_HCI_COMMANDS 2308 }; 2309 #undef X 2310 #endif 2311 2312 hci_stack->local_supported_commands = 0; 2313 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2314 uint16_t i; 2315 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2316 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2317 #ifdef ENABLE_LOG_DEBUG 2318 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); 2319 #else 2320 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2321 #endif 2322 hci_stack->local_supported_commands |= (1LU << i); 2323 } 2324 } 2325 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2326 } 2327 2328 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2329 UNUSED(size); 2330 2331 uint16_t manufacturer; 2332 #ifdef ENABLE_CLASSIC 2333 hci_con_handle_t handle; 2334 hci_connection_t * conn; 2335 uint8_t status; 2336 #endif 2337 // get num cmd packets - limit to 1 to reduce complexity 2338 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2339 2340 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2341 switch (opcode){ 2342 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2343 if (packet[5]) break; 2344 // terminate, name 248 chars 2345 packet[6+248] = 0; 2346 log_info("local name: %s", &packet[6]); 2347 break; 2348 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2349 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2350 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2351 uint16_t acl_len = little_endian_read_16(packet, 6); 2352 uint16_t sco_len = packet[8]; 2353 2354 // determine usable ACL/SCO payload size 2355 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2356 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2357 2358 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2359 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2360 2361 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2362 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2363 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2364 } 2365 break; 2366 case HCI_OPCODE_HCI_READ_RSSI: 2367 if (packet[5] == ERROR_CODE_SUCCESS){ 2368 uint8_t event[5]; 2369 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2370 event[1] = 3; 2371 (void)memcpy(&event[2], &packet[6], 3); 2372 hci_emit_event(event, sizeof(event), 1); 2373 } 2374 break; 2375 #ifdef ENABLE_BLE 2376 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2377 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2378 hci_stack->le_acl_packets_total_num = packet[8]; 2379 // determine usable ACL payload size 2380 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2381 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2382 } 2383 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2384 break; 2385 #endif 2386 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2387 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2388 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2389 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2390 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); 2391 break; 2392 #endif 2393 #ifdef ENABLE_LE_CENTRAL 2394 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2395 hci_stack->le_whitelist_capacity = packet[6]; 2396 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2397 break; 2398 #endif 2399 case HCI_OPCODE_HCI_READ_BD_ADDR: 2400 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2401 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)); 2402 #ifdef ENABLE_CLASSIC 2403 if (hci_stack->link_key_db){ 2404 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2405 } 2406 #endif 2407 break; 2408 #ifdef ENABLE_CLASSIC 2409 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2410 hci_emit_discoverable_enabled(hci_stack->discoverable); 2411 break; 2412 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2413 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2414 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2415 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2416 hci_emit_event(event, sizeof(event), 1); 2417 } 2418 break; 2419 #endif 2420 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2421 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2422 2423 #ifdef ENABLE_CLASSIC 2424 // determine usable ACL packet types based on host buffer size and supported features 2425 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2426 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2427 #endif 2428 // Classic/LE 2429 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2430 break; 2431 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2432 manufacturer = little_endian_read_16(packet, 10); 2433 // map Cypress to Broadcom 2434 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2435 log_info("Treat Cypress as Broadcom"); 2436 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2437 little_endian_store_16(packet, 10, manufacturer); 2438 } 2439 hci_stack->manufacturer = manufacturer; 2440 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2441 break; 2442 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2443 hci_store_local_supported_commands(packet); 2444 break; 2445 #ifdef ENABLE_CLASSIC 2446 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2447 if (packet[5]) return; 2448 hci_stack->synchronous_flow_control_enabled = 1; 2449 break; 2450 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2451 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2452 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2453 conn = hci_connection_for_handle(handle); 2454 if (conn != NULL) { 2455 uint8_t key_size = 0; 2456 if (status == 0){ 2457 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2458 log_info("Handle %04x key Size: %u", handle, key_size); 2459 } else { 2460 key_size = 1; 2461 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2462 } 2463 hci_handle_read_encryption_key_size_complete(conn, key_size); 2464 } 2465 break; 2466 // assert pairing complete event is emitted. 2467 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2468 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2469 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2470 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2471 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2472 // lookup connection by gap pairing addr 2473 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2474 if (conn == NULL) break; 2475 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2476 break; 2477 2478 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2479 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2480 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2481 uint8_t event[67]; 2482 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2483 event[1] = 65; 2484 (void)memset(&event[2], 0, 65); 2485 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2486 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2487 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2488 event[2] = 3; 2489 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2490 } else { 2491 event[2] = 1; 2492 } 2493 } 2494 hci_emit_event(event, sizeof(event), 0); 2495 break; 2496 } 2497 2498 // note: only needed if user does not provide OOB data 2499 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2500 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2501 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2502 if (conn == NULL) break; 2503 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2504 break; 2505 #endif 2506 #endif 2507 default: 2508 break; 2509 } 2510 } 2511 2512 #ifdef ENABLE_BLE 2513 static void event_handle_le_connection_complete(const uint8_t * packet){ 2514 bd_addr_t addr; 2515 bd_addr_type_t addr_type; 2516 hci_connection_t * conn; 2517 2518 // Connection management 2519 reverse_bd_addr(&packet[8], addr); 2520 addr_type = (bd_addr_type_t)packet[7]; 2521 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2522 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2523 2524 #ifdef ENABLE_LE_CENTRAL 2525 // handle error: error is reported only to the initiator -> outgoing connection 2526 if (packet[3]){ 2527 2528 // handle cancelled outgoing connection 2529 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2530 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2531 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2532 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2533 // reset state 2534 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2535 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2536 // get outgoing connection conn struct for direct connect 2537 conn = gap_get_outgoing_connection(); 2538 } 2539 2540 // outgoing le connection establishment is done 2541 if (conn){ 2542 // remove entry 2543 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2544 btstack_memory_hci_connection_free( conn ); 2545 } 2546 return; 2547 } 2548 #endif 2549 2550 // on success, both hosts receive connection complete event 2551 if (packet[6] == HCI_ROLE_MASTER){ 2552 #ifdef ENABLE_LE_CENTRAL 2553 // if we're master on an le connection, it was an outgoing connection and we're done with it 2554 // note: no hci_connection_t object exists yet for connect with whitelist 2555 if (hci_is_le_connection_type(addr_type)){ 2556 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2557 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2558 } 2559 #endif 2560 } else { 2561 #ifdef ENABLE_LE_PERIPHERAL 2562 // if we're slave, it was an incoming connection, advertisements have stopped 2563 hci_stack->le_advertisements_active = false; 2564 #endif 2565 } 2566 2567 // LE connections are auto-accepted, so just create a connection if there isn't one already 2568 if (!conn){ 2569 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2570 } 2571 2572 // no memory, sorry. 2573 if (!conn){ 2574 return; 2575 } 2576 2577 conn->state = OPEN; 2578 conn->role = packet[6]; 2579 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2580 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2581 2582 #ifdef ENABLE_LE_PERIPHERAL 2583 if (packet[6] == HCI_ROLE_SLAVE){ 2584 hci_update_advertisements_enabled_for_current_roles(); 2585 } 2586 #endif 2587 2588 // init unenhanced att bearer mtu 2589 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2590 conn->att_connection.mtu_exchanged = false; 2591 2592 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2593 2594 // restart timer 2595 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2596 // btstack_run_loop_add_timer(&conn->timeout); 2597 2598 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2599 2600 hci_emit_nr_connections_changed(); 2601 } 2602 #endif 2603 2604 #ifdef ENABLE_CLASSIC 2605 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){ 2606 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2607 // LEVEL_4 is tested by l2cap 2608 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2609 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2610 if (level >= LEVEL_3){ 2611 // MITM not possible without keyboard or display 2612 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2613 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2614 2615 // MITM possible if one side has keyboard and the other has keyboard or display 2616 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2617 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2618 2619 // MITM not possible if one side has only display and other side has no keyboard 2620 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2621 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2622 } 2623 // LEVEL 2 requires SSP, which is a given 2624 return true; 2625 } 2626 2627 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2628 uint16_t i; 2629 for (i=0; i < size ; i++){ 2630 if (data[i] != 0) { 2631 return false; 2632 } 2633 } 2634 return true; 2635 } 2636 2637 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2638 // get requested security level 2639 gap_security_level_t requested_security_level = conn->requested_security_level; 2640 if (hci_stack->gap_secure_connections_only_mode){ 2641 requested_security_level = LEVEL_4; 2642 } 2643 2644 // assess security: LEVEL 4 requires SC 2645 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2646 if ((requested_security_level == LEVEL_4) && 2647 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2648 !hci_remote_sc_enabled(conn)){ 2649 log_info("Level 4 required, but SC not supported -> abort"); 2650 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2651 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2652 return; 2653 } 2654 2655 // assess security based on io capabilities 2656 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2657 // responder: fully validate io caps of both sides as well as OOB data 2658 bool security_possible = false; 2659 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2660 2661 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2662 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2663 // so we merge the OOB data availability 2664 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2665 if (conn->classic_oob_c_192 != NULL){ 2666 have_oob_data |= 1; 2667 } 2668 if (conn->classic_oob_c_256 != NULL){ 2669 have_oob_data |= 2; 2670 } 2671 // for up to Level 3, either P-192 as well as P-256 will do 2672 // 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 2673 // if remote does not SC, we should not receive P-256 data either 2674 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2675 security_possible = true; 2676 } 2677 // for Level 4, P-256 is needed 2678 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2679 security_possible = true; 2680 } 2681 #endif 2682 2683 if (security_possible == false){ 2684 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2685 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2686 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2687 return; 2688 } 2689 } else { 2690 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2691 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2692 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2693 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2694 log_info("Level 3+ required, but no input/output -> abort"); 2695 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2696 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2697 return; 2698 } 2699 #endif 2700 #endif 2701 } 2702 2703 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2704 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2705 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2706 } else { 2707 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2708 } 2709 #endif 2710 } 2711 2712 #endif 2713 2714 static void event_handler(uint8_t *packet, uint16_t size){ 2715 2716 uint16_t event_length = packet[1]; 2717 2718 // assert packet is complete 2719 if (size != (event_length + 2u)){ 2720 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2721 return; 2722 } 2723 2724 bd_addr_type_t addr_type; 2725 hci_con_handle_t handle; 2726 hci_connection_t * conn; 2727 int i; 2728 int create_connection_cmd; 2729 2730 #ifdef ENABLE_CLASSIC 2731 hci_link_type_t link_type; 2732 bd_addr_t addr; 2733 #endif 2734 2735 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2736 2737 switch (hci_event_packet_get_type(packet)) { 2738 2739 case HCI_EVENT_COMMAND_COMPLETE: 2740 handle_command_complete_event(packet, size); 2741 break; 2742 2743 case HCI_EVENT_COMMAND_STATUS: 2744 // get num cmd packets - limit to 1 to reduce complexity 2745 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2746 2747 // check command status to detected failed outgoing connections 2748 create_connection_cmd = 0; 2749 #ifdef ENABLE_CLASSIC 2750 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2751 create_connection_cmd = 1; 2752 } 2753 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2754 create_connection_cmd = 1; 2755 } 2756 #endif 2757 #ifdef ENABLE_LE_CENTRAL 2758 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2759 create_connection_cmd = 1; 2760 } 2761 #endif 2762 if (create_connection_cmd) { 2763 uint8_t status = hci_event_command_status_get_status(packet); 2764 addr_type = hci_stack->outgoing_addr_type; 2765 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2766 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); 2767 2768 // reset outgoing address info 2769 memset(hci_stack->outgoing_addr, 0, 6); 2770 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2771 2772 // on error 2773 if (status != ERROR_CODE_SUCCESS){ 2774 #ifdef ENABLE_LE_CENTRAL 2775 if (hci_is_le_connection_type(addr_type)){ 2776 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2777 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2778 } 2779 #endif 2780 // error => outgoing connection failed 2781 if (conn != NULL){ 2782 hci_handle_connection_failed(conn, status); 2783 } 2784 } 2785 } 2786 2787 #ifdef ENABLE_CLASSIC 2788 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2789 uint8_t status = hci_event_command_status_get_status(packet); 2790 log_info("command status (inquiry), status %x", status); 2791 if (status == ERROR_CODE_SUCCESS) { 2792 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2793 } else { 2794 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2795 } 2796 } 2797 #endif 2798 break; 2799 2800 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2801 if (size < 3) return; 2802 uint16_t num_handles = packet[2]; 2803 if (size != (3u + num_handles * 4u)) return; 2804 uint16_t offset = 3; 2805 for (i=0; i<num_handles;i++){ 2806 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2807 offset += 2u; 2808 uint16_t num_packets = little_endian_read_16(packet, offset); 2809 offset += 2u; 2810 2811 conn = hci_connection_for_handle(handle); 2812 if (!conn){ 2813 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2814 continue; 2815 } 2816 2817 if (conn->num_packets_sent >= num_packets){ 2818 conn->num_packets_sent -= num_packets; 2819 } else { 2820 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2821 conn->num_packets_sent = 0; 2822 } 2823 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2824 2825 #ifdef ENABLE_CLASSIC 2826 // For SCO, we do the can_send_now_check here 2827 hci_notify_if_sco_can_send_now(); 2828 #endif 2829 } 2830 break; 2831 } 2832 2833 #ifdef ENABLE_CLASSIC 2834 case HCI_EVENT_INQUIRY_COMPLETE: 2835 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2836 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2837 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2838 hci_emit_event(event, sizeof(event), 1); 2839 } 2840 break; 2841 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2842 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2843 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2844 } 2845 break; 2846 case HCI_EVENT_CONNECTION_REQUEST: 2847 reverse_bd_addr(&packet[2], addr); 2848 link_type = (hci_link_type_t) packet[11]; 2849 2850 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2851 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2852 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2853 bd_addr_copy(hci_stack->decline_addr, addr); 2854 break; 2855 } 2856 2857 if (hci_stack->gap_classic_accept_callback != NULL){ 2858 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2859 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2860 bd_addr_copy(hci_stack->decline_addr, addr); 2861 break; 2862 } 2863 } 2864 2865 // TODO: eval COD 8-10 2866 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2867 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2868 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2869 if (!conn) { 2870 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2871 } 2872 if (!conn) { 2873 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2874 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2875 bd_addr_copy(hci_stack->decline_addr, addr); 2876 hci_run(); 2877 // avoid event to higher layer 2878 return; 2879 } 2880 conn->role = HCI_ROLE_SLAVE; 2881 conn->state = RECEIVED_CONNECTION_REQUEST; 2882 // store info about eSCO 2883 if (link_type == HCI_LINK_TYPE_ESCO){ 2884 conn->remote_supported_features[0] |= 1; 2885 } 2886 hci_run(); 2887 break; 2888 2889 case HCI_EVENT_CONNECTION_COMPLETE: 2890 // Connection management 2891 reverse_bd_addr(&packet[5], addr); 2892 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2893 addr_type = BD_ADDR_TYPE_ACL; 2894 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2895 if (conn) { 2896 if (!packet[2]){ 2897 conn->state = OPEN; 2898 conn->con_handle = little_endian_read_16(packet, 3); 2899 2900 // queue set supervision timeout if we're master 2901 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2902 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2903 } 2904 2905 // restart timer 2906 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2907 btstack_run_loop_add_timer(&conn->timeout); 2908 2909 // trigger remote features for dedicated bonding 2910 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2911 hci_trigger_remote_features_for_connection(conn); 2912 } 2913 2914 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2915 2916 hci_emit_nr_connections_changed(); 2917 } else { 2918 // connection failed 2919 hci_handle_connection_failed(conn, packet[2]); 2920 } 2921 } 2922 break; 2923 2924 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2925 reverse_bd_addr(&packet[5], addr); 2926 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2927 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2928 if (packet[2]){ 2929 // connection failed 2930 if (conn){ 2931 hci_handle_connection_failed(conn, packet[2]); 2932 } 2933 break; 2934 } 2935 if (!conn) { 2936 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2937 } 2938 if (!conn) { 2939 break; 2940 } 2941 conn->state = OPEN; 2942 conn->con_handle = little_endian_read_16(packet, 3); 2943 2944 #ifdef ENABLE_SCO_OVER_HCI 2945 // update SCO 2946 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2947 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2948 } 2949 // trigger can send now 2950 if (hci_have_usb_transport()){ 2951 hci_stack->sco_can_send_now = true; 2952 } 2953 #endif 2954 #ifdef HAVE_SCO_TRANSPORT 2955 // configure sco transport 2956 if (hci_stack->sco_transport != NULL){ 2957 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2958 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2959 } 2960 #endif 2961 break; 2962 2963 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2964 handle = little_endian_read_16(packet, 3); 2965 conn = hci_connection_for_handle(handle); 2966 if (!conn) break; 2967 if (!packet[2]){ 2968 const uint8_t * features = &packet[5]; 2969 hci_handle_remote_features_page_0(conn, features); 2970 2971 // read extended features if possible 2972 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 2973 && ((conn->remote_supported_features[0] & 2) != 0)) { 2974 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2975 break; 2976 } 2977 } 2978 hci_handle_remote_features_received(conn); 2979 break; 2980 2981 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2982 handle = little_endian_read_16(packet, 3); 2983 conn = hci_connection_for_handle(handle); 2984 if (!conn) break; 2985 // status = ok, page = 1 2986 if (!packet[2]) { 2987 uint8_t page_number = packet[5]; 2988 uint8_t maximum_page_number = packet[6]; 2989 const uint8_t * features = &packet[7]; 2990 bool done = false; 2991 switch (page_number){ 2992 case 1: 2993 hci_handle_remote_features_page_1(conn, features); 2994 if (maximum_page_number >= 2){ 2995 // get Secure Connections (Controller) from Page 2 if available 2996 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2997 } else { 2998 // otherwise, assume SC (Controller) == SC (Host) 2999 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3000 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3001 } 3002 done = true; 3003 } 3004 break; 3005 case 2: 3006 hci_handle_remote_features_page_2(conn, features); 3007 done = true; 3008 break; 3009 default: 3010 break; 3011 } 3012 if (!done) break; 3013 } 3014 hci_handle_remote_features_received(conn); 3015 break; 3016 3017 case HCI_EVENT_LINK_KEY_REQUEST: 3018 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3019 hci_event_link_key_request_get_bd_addr(packet, addr); 3020 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3021 if (!conn) break; 3022 3023 // lookup link key in db if not cached 3024 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3025 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3026 } 3027 3028 // response sent by hci_run() 3029 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3030 #endif 3031 break; 3032 3033 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3034 hci_event_link_key_request_get_bd_addr(packet, addr); 3035 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3036 if (!conn) break; 3037 3038 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3039 3040 // CVE-2020-26555: ignore NULL link key 3041 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3042 if (btstack_is_null(&packet[8], 16)) break; 3043 3044 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3045 // Change Connection Encryption keeps link key type 3046 if (link_key_type != CHANGED_COMBINATION_KEY){ 3047 conn->link_key_type = link_key_type; 3048 } 3049 3050 // cache link key. link keys stored in little-endian format for legacy reasons 3051 memcpy(&conn->link_key, &packet[8], 16); 3052 3053 // only store link key: 3054 // - if bondable enabled 3055 if (hci_stack->bondable == false) break; 3056 // - if security level sufficient 3057 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3058 // - for SSP, also check if remote side requested bonding as well 3059 if (conn->link_key_type != COMBINATION_KEY){ 3060 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3061 if (!remote_bonding){ 3062 break; 3063 } 3064 } 3065 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3066 break; 3067 } 3068 3069 case HCI_EVENT_PIN_CODE_REQUEST: 3070 hci_event_pin_code_request_get_bd_addr(packet, addr); 3071 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3072 if (!conn) break; 3073 3074 hci_pairing_started(conn, false); 3075 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3076 if (!hci_stack->bondable ){ 3077 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3078 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3079 hci_run(); 3080 return; 3081 } 3082 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3083 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3084 log_info("Level 4 required, but SC not supported -> abort"); 3085 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3086 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3087 hci_run(); 3088 return; 3089 } 3090 break; 3091 3092 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3093 hci_event_io_capability_response_get_bd_addr(packet, addr); 3094 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3095 if (!conn) break; 3096 3097 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3098 hci_pairing_started(conn, true); 3099 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3100 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3101 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3102 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3103 #endif 3104 break; 3105 3106 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3107 hci_event_io_capability_response_get_bd_addr(packet, addr); 3108 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3109 if (!conn) break; 3110 3111 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3112 hci_connection_timestamp(conn); 3113 hci_pairing_started(conn, true); 3114 break; 3115 3116 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3117 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3118 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3119 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3120 if (!conn) break; 3121 3122 hci_connection_timestamp(conn); 3123 3124 hci_pairing_started(conn, true); 3125 3126 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3127 break; 3128 #endif 3129 3130 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3131 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3132 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3133 if (!conn) break; 3134 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3135 if (hci_stack->ssp_auto_accept){ 3136 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3137 }; 3138 } else { 3139 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3140 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3141 // don't forward event to app 3142 hci_run(); 3143 return; 3144 } 3145 break; 3146 3147 case HCI_EVENT_USER_PASSKEY_REQUEST: 3148 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3149 if (hci_stack->ssp_auto_accept){ 3150 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3151 }; 3152 break; 3153 3154 case HCI_EVENT_MODE_CHANGE: 3155 handle = hci_event_mode_change_get_handle(packet); 3156 conn = hci_connection_for_handle(handle); 3157 if (!conn) break; 3158 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3159 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3160 break; 3161 #endif 3162 3163 case HCI_EVENT_ENCRYPTION_CHANGE: 3164 handle = hci_event_encryption_change_get_connection_handle(packet); 3165 conn = hci_connection_for_handle(handle); 3166 if (!conn) break; 3167 if (hci_event_encryption_change_get_status(packet) == 0u) { 3168 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3169 if (encryption_enabled){ 3170 if (hci_is_le_connection(conn)){ 3171 // For LE, we accept connection as encrypted 3172 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3173 } 3174 #ifdef ENABLE_CLASSIC 3175 else { 3176 3177 // dedicated bonding: send result and disconnect 3178 if (conn->bonding_flags & BONDING_DEDICATED){ 3179 conn->bonding_flags &= ~BONDING_DEDICATED; 3180 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3181 conn->bonding_status = packet[2]; 3182 break; 3183 } 3184 3185 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3186 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3187 bool connected_uses_aes_ccm = encryption_enabled == 2; 3188 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3189 log_info("SC during pairing, but only E0 now -> abort"); 3190 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3191 break; 3192 } 3193 3194 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3195 if (connected_uses_aes_ccm){ 3196 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3197 } 3198 3199 #ifdef ENABLE_TESTING_SUPPORT 3200 // work around for issue with PTS dongle 3201 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3202 #endif 3203 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3204 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3205 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3206 } else { 3207 // if not, pretend everything is perfect 3208 hci_handle_read_encryption_key_size_complete(conn, 16); 3209 } 3210 } 3211 #endif 3212 } else { 3213 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3214 } 3215 } 3216 3217 break; 3218 3219 #ifdef ENABLE_CLASSIC 3220 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3221 handle = hci_event_authentication_complete_get_connection_handle(packet); 3222 conn = hci_connection_for_handle(handle); 3223 if (!conn) break; 3224 3225 // clear authentication active flag 3226 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3227 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3228 3229 // authenticated only if auth status == 0 3230 if (hci_event_authentication_complete_get_status(packet) == 0){ 3231 // authenticated 3232 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3233 3234 // If not already encrypted, start encryption 3235 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3236 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3237 break; 3238 } 3239 } 3240 3241 // emit updated security level 3242 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3243 break; 3244 3245 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3246 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3247 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3248 if (!conn) break; 3249 3250 // treat successfully paired connection as authenticated 3251 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3252 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3253 } 3254 3255 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3256 break; 3257 #endif 3258 3259 // HCI_EVENT_DISCONNECTION_COMPLETE 3260 // has been split, to first notify stack before shutting connection down 3261 // see end of function, too. 3262 case HCI_EVENT_DISCONNECTION_COMPLETE: 3263 if (packet[2]) break; // status != 0 3264 handle = little_endian_read_16(packet, 3); 3265 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3266 if (hci_stack->acl_fragmentation_total_size > 0u) { 3267 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3268 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3269 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3270 hci_stack->acl_fragmentation_total_size = 0; 3271 hci_stack->acl_fragmentation_pos = 0; 3272 if (release_buffer){ 3273 hci_release_packet_buffer(); 3274 } 3275 } 3276 } 3277 3278 conn = hci_connection_for_handle(handle); 3279 if (!conn) break; 3280 #ifdef ENABLE_CLASSIC 3281 // pairing failed if it was ongoing 3282 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3283 #endif 3284 3285 // emit dedicatd bonding event 3286 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3287 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3288 } 3289 3290 // mark connection for shutdown, stop timers, reset state 3291 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3292 hci_connection_stop_timer(conn); 3293 hci_connection_init(conn); 3294 3295 #ifdef ENABLE_BLE 3296 #ifdef ENABLE_LE_PERIPHERAL 3297 // re-enable advertisements for le connections if active 3298 if (hci_is_le_connection(conn)){ 3299 hci_update_advertisements_enabled_for_current_roles(); 3300 } 3301 #endif 3302 #endif 3303 break; 3304 3305 case HCI_EVENT_HARDWARE_ERROR: 3306 log_error("Hardware Error: 0x%02x", packet[2]); 3307 if (hci_stack->hardware_error_callback){ 3308 (*hci_stack->hardware_error_callback)(packet[2]); 3309 } else { 3310 // if no special requests, just reboot stack 3311 hci_power_control_off(); 3312 hci_power_control_on(); 3313 } 3314 break; 3315 3316 #ifdef ENABLE_CLASSIC 3317 case HCI_EVENT_ROLE_CHANGE: 3318 if (packet[2]) break; // status != 0 3319 reverse_bd_addr(&packet[3], addr); 3320 addr_type = BD_ADDR_TYPE_ACL; 3321 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3322 if (!conn) break; 3323 conn->role = packet[9]; 3324 break; 3325 #endif 3326 3327 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3328 // release packet buffer only for asynchronous transport and if there are not further fragements 3329 if (hci_transport_synchronous()) { 3330 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3331 return; // instead of break: to avoid re-entering hci_run() 3332 } 3333 hci_stack->acl_fragmentation_tx_active = 0; 3334 if (hci_stack->acl_fragmentation_total_size) break; 3335 hci_release_packet_buffer(); 3336 3337 // L2CAP receives this event via the hci_emit_event below 3338 3339 #ifdef ENABLE_CLASSIC 3340 // For SCO, we do the can_send_now_check here 3341 hci_notify_if_sco_can_send_now(); 3342 #endif 3343 break; 3344 3345 #ifdef ENABLE_CLASSIC 3346 case HCI_EVENT_SCO_CAN_SEND_NOW: 3347 // For SCO, we do the can_send_now_check here 3348 hci_stack->sco_can_send_now = true; 3349 hci_notify_if_sco_can_send_now(); 3350 return; 3351 3352 // explode inquriy results for easier consumption 3353 case HCI_EVENT_INQUIRY_RESULT: 3354 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3355 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3356 gap_inquiry_explode(packet, size); 3357 break; 3358 #endif 3359 3360 #ifdef ENABLE_BLE 3361 case HCI_EVENT_LE_META: 3362 switch (packet[2]){ 3363 #ifdef ENABLE_LE_CENTRAL 3364 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3365 if (!hci_stack->le_scanning_enabled) break; 3366 le_handle_advertisement_report(packet, size); 3367 break; 3368 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3369 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3370 if (!hci_stack->le_scanning_enabled) break; 3371 le_handle_extended_advertisement_report(packet, size); 3372 break; 3373 #endif 3374 #endif 3375 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3376 event_handle_le_connection_complete(packet); 3377 break; 3378 3379 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3380 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3381 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3382 conn = hci_connection_for_handle(handle); 3383 if (!conn) break; 3384 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3385 break; 3386 3387 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3388 // connection 3389 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3390 conn = hci_connection_for_handle(handle); 3391 if (conn) { 3392 // read arguments 3393 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3394 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3395 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3396 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3397 3398 // validate against current connection parameter range 3399 le_connection_parameter_range_t existing_range; 3400 gap_get_connection_parameter_range(&existing_range); 3401 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3402 if (update_parameter){ 3403 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3404 conn->le_conn_interval_min = le_conn_interval_min; 3405 conn->le_conn_interval_max = le_conn_interval_max; 3406 conn->le_conn_latency = le_conn_latency; 3407 conn->le_supervision_timeout = le_supervision_timeout; 3408 } else { 3409 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3410 } 3411 } 3412 break; 3413 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3414 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3415 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3416 conn = hci_connection_for_handle(handle); 3417 if (conn) { 3418 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3419 } 3420 break; 3421 #endif 3422 default: 3423 break; 3424 } 3425 break; 3426 #endif 3427 case HCI_EVENT_VENDOR_SPECIFIC: 3428 // Vendor specific commands often create vendor specific event instead of num completed packets 3429 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3430 switch (hci_stack->manufacturer){ 3431 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3432 hci_stack->num_cmd_packets = 1; 3433 break; 3434 default: 3435 break; 3436 } 3437 break; 3438 default: 3439 break; 3440 } 3441 3442 handle_event_for_current_stack_state(packet, size); 3443 3444 // notify upper stack 3445 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3446 3447 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3448 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3449 handle = little_endian_read_16(packet, 3); 3450 hci_connection_t * aConn = hci_connection_for_handle(handle); 3451 // discard connection if app did not trigger a reconnect in the event handler 3452 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3453 hci_shutdown_connection(aConn); 3454 } 3455 } 3456 3457 // execute main loop 3458 hci_run(); 3459 } 3460 3461 #ifdef ENABLE_CLASSIC 3462 3463 #ifdef ENABLE_SCO_OVER_HCI 3464 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3465 static void sco_schedule_tx(hci_connection_t * conn); 3466 3467 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3468 log_debug("SCO TX Timeout"); 3469 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3470 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3471 if (!conn) return; 3472 3473 // trigger send 3474 conn->sco_tx_ready = 1; 3475 // extra packet if CVSD but SCO buffer is too short 3476 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3477 conn->sco_tx_ready++; 3478 } 3479 hci_notify_if_sco_can_send_now(); 3480 } 3481 3482 3483 #define SCO_TX_AFTER_RX_MS (6) 3484 3485 static void sco_schedule_tx(hci_connection_t * conn){ 3486 3487 uint32_t now = btstack_run_loop_get_time_ms(); 3488 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3489 int time_delta_ms = sco_tx_ms - now; 3490 3491 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3492 3493 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3494 btstack_run_loop_remove_timer(timer); 3495 btstack_run_loop_set_timer(timer, time_delta_ms); 3496 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3497 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3498 btstack_run_loop_add_timer(timer); 3499 } 3500 #endif 3501 3502 static void sco_handler(uint8_t * packet, uint16_t size){ 3503 // lookup connection struct 3504 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3505 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3506 if (!conn) return; 3507 3508 #ifdef ENABLE_SCO_OVER_HCI 3509 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3510 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3511 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3512 packet[2] = 0x3c; 3513 memmove(&packet[3], &packet[23], 63); 3514 size = 63; 3515 } 3516 } 3517 3518 if (hci_have_usb_transport()){ 3519 // Nothing to do 3520 } else { 3521 // 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); 3522 if (hci_stack->synchronous_flow_control_enabled == 0){ 3523 uint32_t now = btstack_run_loop_get_time_ms(); 3524 3525 if (!conn->sco_rx_valid){ 3526 // ignore first 10 packets 3527 conn->sco_rx_count++; 3528 // log_debug("sco rx count %u", conn->sco_rx_count); 3529 if (conn->sco_rx_count == 10) { 3530 // use first timestamp as is and pretent it just started 3531 conn->sco_rx_ms = now; 3532 conn->sco_rx_valid = 1; 3533 conn->sco_rx_count = 0; 3534 sco_schedule_tx(conn); 3535 } 3536 } else { 3537 // track expected arrival timme 3538 conn->sco_rx_count++; 3539 conn->sco_rx_ms += 7; 3540 int delta = (int32_t) (now - conn->sco_rx_ms); 3541 if (delta > 0){ 3542 conn->sco_rx_ms++; 3543 } 3544 // log_debug("sco rx %u", conn->sco_rx_ms); 3545 sco_schedule_tx(conn); 3546 } 3547 } 3548 } 3549 #endif 3550 3551 // deliver to app 3552 if (hci_stack->sco_packet_handler) { 3553 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3554 } 3555 3556 #ifdef HAVE_SCO_TRANSPORT 3557 // We can send one packet for each received packet 3558 conn->sco_tx_ready++; 3559 hci_notify_if_sco_can_send_now(); 3560 #endif 3561 3562 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3563 conn->num_packets_completed++; 3564 hci_stack->host_completed_packets = 1; 3565 hci_run(); 3566 #endif 3567 } 3568 #endif 3569 3570 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3571 hci_dump_packet(packet_type, 1, packet, size); 3572 switch (packet_type) { 3573 case HCI_EVENT_PACKET: 3574 event_handler(packet, size); 3575 break; 3576 case HCI_ACL_DATA_PACKET: 3577 acl_handler(packet, size); 3578 break; 3579 #ifdef ENABLE_CLASSIC 3580 case HCI_SCO_DATA_PACKET: 3581 sco_handler(packet, size); 3582 break; 3583 #endif 3584 default: 3585 break; 3586 } 3587 } 3588 3589 /** 3590 * @brief Add event packet handler. 3591 */ 3592 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3593 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3594 } 3595 3596 /** 3597 * @brief Remove event packet handler. 3598 */ 3599 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3600 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3601 } 3602 3603 /** Register HCI packet handlers */ 3604 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3605 hci_stack->acl_packet_handler = handler; 3606 } 3607 3608 #ifdef ENABLE_CLASSIC 3609 /** 3610 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3611 */ 3612 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3613 hci_stack->sco_packet_handler = handler; 3614 } 3615 #endif 3616 3617 static void hci_state_reset(void){ 3618 // no connections yet 3619 hci_stack->connections = NULL; 3620 3621 // keep discoverable/connectable as this has been requested by the client(s) 3622 // hci_stack->discoverable = 0; 3623 // hci_stack->connectable = 0; 3624 // hci_stack->bondable = 1; 3625 // hci_stack->own_addr_type = 0; 3626 3627 // buffer is free 3628 hci_stack->hci_packet_buffer_reserved = false; 3629 3630 // no pending cmds 3631 hci_stack->decline_reason = 0; 3632 3633 hci_stack->secure_connections_active = false; 3634 3635 #ifdef ENABLE_CLASSIC 3636 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3637 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3638 3639 hci_stack->gap_tasks_classic = 3640 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3641 GAP_TASK_SET_CLASS_OF_DEVICE | 3642 GAP_TASK_SET_LOCAL_NAME | 3643 GAP_TASK_SET_EIR_DATA | 3644 GAP_TASK_WRITE_SCAN_ENABLE | 3645 GAP_TASK_WRITE_PAGE_TIMEOUT; 3646 #endif 3647 3648 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3649 hci_stack->classic_read_local_oob_data = false; 3650 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3651 #endif 3652 3653 // LE 3654 #ifdef ENABLE_BLE 3655 memset(hci_stack->le_random_address, 0, 6); 3656 hci_stack->le_random_address_set = 0; 3657 #endif 3658 #ifdef ENABLE_LE_CENTRAL 3659 hci_stack->le_scanning_active = false; 3660 hci_stack->le_scanning_param_update = true; 3661 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3662 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3663 hci_stack->le_whitelist_capacity = 0; 3664 #endif 3665 #ifdef ENABLE_LE_PERIPHERAL 3666 hci_stack->le_advertisements_active = false; 3667 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3668 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3669 } 3670 if (hci_stack->le_advertisements_data != NULL){ 3671 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3672 } 3673 #endif 3674 } 3675 3676 #ifdef ENABLE_CLASSIC 3677 /** 3678 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3679 */ 3680 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3681 // store and open remote device db 3682 hci_stack->link_key_db = link_key_db; 3683 if (hci_stack->link_key_db) { 3684 hci_stack->link_key_db->open(); 3685 } 3686 } 3687 #endif 3688 3689 void hci_init(const hci_transport_t *transport, const void *config){ 3690 3691 #ifdef HAVE_MALLOC 3692 if (!hci_stack) { 3693 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3694 } 3695 #else 3696 hci_stack = &hci_stack_static; 3697 #endif 3698 memset(hci_stack, 0, sizeof(hci_stack_t)); 3699 3700 // reference to use transport layer implementation 3701 hci_stack->hci_transport = transport; 3702 3703 // reference to used config 3704 hci_stack->config = config; 3705 3706 // setup pointer for outgoing packet buffer 3707 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3708 3709 // max acl payload size defined in config.h 3710 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3711 3712 // register packet handlers with transport 3713 transport->register_packet_handler(&packet_handler); 3714 3715 hci_stack->state = HCI_STATE_OFF; 3716 3717 // class of device 3718 hci_stack->class_of_device = 0x007a020c; // Smartphone 3719 3720 // bondable by default 3721 hci_stack->bondable = 1; 3722 3723 #ifdef ENABLE_CLASSIC 3724 // classic name 3725 hci_stack->local_name = default_classic_name; 3726 3727 // Master slave policy 3728 hci_stack->master_slave_policy = 1; 3729 3730 // Allow Role Switch 3731 hci_stack->allow_role_switch = 1; 3732 3733 // Default / minimum security level = 2 3734 hci_stack->gap_security_level = LEVEL_2; 3735 3736 // Default Security Mode 4 3737 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3738 3739 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3740 hci_stack->gap_required_encyrption_key_size = 7; 3741 3742 // Link Supervision Timeout 3743 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3744 3745 #endif 3746 3747 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3748 hci_stack->ssp_enable = 1; 3749 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3750 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3751 hci_stack->ssp_auto_accept = 1; 3752 3753 // Secure Connections: enable (requires support from Controller) 3754 hci_stack->secure_connections_enable = true; 3755 3756 // voice setting - signed 16 bit pcm data with CVSD over the air 3757 hci_stack->sco_voice_setting = 0x60; 3758 3759 #ifdef ENABLE_LE_CENTRAL 3760 // connection parameter to use for outgoing connections 3761 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3762 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3763 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3764 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3765 hci_stack->le_connection_latency = 4; // 4 3766 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3767 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3768 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3769 3770 // default LE Scanning 3771 hci_stack->le_scan_type = 0x1; // active 3772 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3773 hci_stack->le_scan_window = 0x30; // 30 ms 3774 #endif 3775 3776 #ifdef ENABLE_LE_PERIPHERAL 3777 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3778 #endif 3779 3780 // connection parameter range used to answer connection parameter update requests in l2cap 3781 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3782 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3783 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3784 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3785 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3786 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3787 3788 hci_state_reset(); 3789 } 3790 3791 void hci_deinit(void){ 3792 #ifdef HAVE_MALLOC 3793 if (hci_stack) { 3794 free(hci_stack); 3795 } 3796 #endif 3797 hci_stack = NULL; 3798 3799 #ifdef ENABLE_CLASSIC 3800 disable_l2cap_timeouts = 0; 3801 #endif 3802 } 3803 3804 /** 3805 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3806 */ 3807 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3808 hci_stack->chipset = chipset_driver; 3809 3810 // reset chipset driver - init is also called on power_up 3811 if (hci_stack->chipset && hci_stack->chipset->init){ 3812 hci_stack->chipset->init(hci_stack->config); 3813 } 3814 } 3815 3816 /** 3817 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3818 */ 3819 void hci_set_control(const btstack_control_t *hardware_control){ 3820 // references to used control implementation 3821 hci_stack->control = hardware_control; 3822 // init with transport config 3823 hardware_control->init(hci_stack->config); 3824 } 3825 3826 static void hci_discard_connections(void){ 3827 btstack_linked_list_iterator_t lit; 3828 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3829 while (btstack_linked_list_iterator_has_next(&lit)){ 3830 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3831 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3832 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3833 hci_shutdown_connection(connection); 3834 } 3835 } 3836 3837 void hci_close(void){ 3838 3839 #ifdef ENABLE_CLASSIC 3840 // close remote device db 3841 if (hci_stack->link_key_db) { 3842 hci_stack->link_key_db->close(); 3843 } 3844 #endif 3845 3846 hci_discard_connections(); 3847 3848 hci_power_control(HCI_POWER_OFF); 3849 3850 #ifdef HAVE_MALLOC 3851 free(hci_stack); 3852 #endif 3853 hci_stack = NULL; 3854 } 3855 3856 #ifdef HAVE_SCO_TRANSPORT 3857 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3858 hci_stack->sco_transport = sco_transport; 3859 sco_transport->register_packet_handler(&packet_handler); 3860 } 3861 #endif 3862 3863 #ifdef ENABLE_CLASSIC 3864 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3865 // validate ranage and set 3866 if (encryption_key_size < 7) return; 3867 if (encryption_key_size > 16) return; 3868 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3869 } 3870 3871 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3872 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3873 hci_stack->gap_security_mode = security_mode; 3874 return ERROR_CODE_SUCCESS; 3875 } else { 3876 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3877 } 3878 } 3879 3880 gap_security_mode_t gap_get_security_mode(void){ 3881 return hci_stack->gap_security_mode; 3882 } 3883 3884 void gap_set_security_level(gap_security_level_t security_level){ 3885 hci_stack->gap_security_level = security_level; 3886 } 3887 3888 gap_security_level_t gap_get_security_level(void){ 3889 if (hci_stack->gap_secure_connections_only_mode){ 3890 return LEVEL_4; 3891 } 3892 return hci_stack->gap_security_level; 3893 } 3894 3895 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3896 hci_stack->gap_minimal_service_security_level = security_level; 3897 } 3898 3899 void gap_set_secure_connections_only_mode(bool enable){ 3900 hci_stack->gap_secure_connections_only_mode = enable; 3901 } 3902 3903 bool gap_get_secure_connections_only_mode(void){ 3904 return hci_stack->gap_secure_connections_only_mode; 3905 } 3906 #endif 3907 3908 #ifdef ENABLE_CLASSIC 3909 void gap_set_class_of_device(uint32_t class_of_device){ 3910 hci_stack->class_of_device = class_of_device; 3911 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3912 hci_run(); 3913 } 3914 3915 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3916 hci_stack->default_link_policy_settings = default_link_policy_settings; 3917 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3918 hci_run(); 3919 } 3920 3921 void gap_set_allow_role_switch(bool allow_role_switch){ 3922 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3923 } 3924 3925 uint8_t hci_get_allow_role_switch(void){ 3926 return hci_stack->allow_role_switch; 3927 } 3928 3929 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3930 hci_stack->link_supervision_timeout = link_supervision_timeout; 3931 } 3932 3933 void hci_disable_l2cap_timeout_check(void){ 3934 disable_l2cap_timeouts = 1; 3935 } 3936 #endif 3937 3938 #ifndef HAVE_HOST_CONTROLLER_API 3939 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3940 void hci_set_bd_addr(bd_addr_t addr){ 3941 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3942 hci_stack->custom_bd_addr_set = 1; 3943 } 3944 #endif 3945 3946 // State-Module-Driver overview 3947 // state module low-level 3948 // HCI_STATE_OFF off close 3949 // HCI_STATE_INITIALIZING, on open 3950 // HCI_STATE_WORKING, on open 3951 // HCI_STATE_HALTING, on open 3952 // HCI_STATE_SLEEPING, off/sleep close 3953 // HCI_STATE_FALLING_ASLEEP on open 3954 3955 static int hci_power_control_on(void){ 3956 3957 // power on 3958 int err = 0; 3959 if (hci_stack->control && hci_stack->control->on){ 3960 err = (*hci_stack->control->on)(); 3961 } 3962 if (err){ 3963 log_error( "POWER_ON failed"); 3964 hci_emit_hci_open_failed(); 3965 return err; 3966 } 3967 3968 // int chipset driver 3969 if (hci_stack->chipset && hci_stack->chipset->init){ 3970 hci_stack->chipset->init(hci_stack->config); 3971 } 3972 3973 // init transport 3974 if (hci_stack->hci_transport->init){ 3975 hci_stack->hci_transport->init(hci_stack->config); 3976 } 3977 3978 // open transport 3979 err = hci_stack->hci_transport->open(); 3980 if (err){ 3981 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3982 if (hci_stack->control && hci_stack->control->off){ 3983 (*hci_stack->control->off)(); 3984 } 3985 hci_emit_hci_open_failed(); 3986 return err; 3987 } 3988 return 0; 3989 } 3990 3991 static void hci_power_control_off(void){ 3992 3993 log_info("hci_power_control_off"); 3994 3995 // close low-level device 3996 hci_stack->hci_transport->close(); 3997 3998 log_info("hci_power_control_off - hci_transport closed"); 3999 4000 // power off 4001 if (hci_stack->control && hci_stack->control->off){ 4002 (*hci_stack->control->off)(); 4003 } 4004 4005 log_info("hci_power_control_off - control closed"); 4006 4007 hci_stack->state = HCI_STATE_OFF; 4008 } 4009 4010 static void hci_power_control_sleep(void){ 4011 4012 log_info("hci_power_control_sleep"); 4013 4014 #if 0 4015 // don't close serial port during sleep 4016 4017 // close low-level device 4018 hci_stack->hci_transport->close(hci_stack->config); 4019 #endif 4020 4021 // sleep mode 4022 if (hci_stack->control && hci_stack->control->sleep){ 4023 (*hci_stack->control->sleep)(); 4024 } 4025 4026 hci_stack->state = HCI_STATE_SLEEPING; 4027 } 4028 4029 static int hci_power_control_wake(void){ 4030 4031 log_info("hci_power_control_wake"); 4032 4033 // wake on 4034 if (hci_stack->control && hci_stack->control->wake){ 4035 (*hci_stack->control->wake)(); 4036 } 4037 4038 #if 0 4039 // open low-level device 4040 int err = hci_stack->hci_transport->open(hci_stack->config); 4041 if (err){ 4042 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4043 if (hci_stack->control && hci_stack->control->off){ 4044 (*hci_stack->control->off)(); 4045 } 4046 hci_emit_hci_open_failed(); 4047 return err; 4048 } 4049 #endif 4050 4051 return 0; 4052 } 4053 4054 static void hci_power_transition_to_initializing(void){ 4055 // set up state machine 4056 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4057 hci_stack->hci_packet_buffer_reserved = false; 4058 hci_stack->state = HCI_STATE_INITIALIZING; 4059 hci_stack->substate = HCI_INIT_SEND_RESET; 4060 } 4061 4062 // returns error 4063 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4064 int err; 4065 switch (power_mode){ 4066 case HCI_POWER_ON: 4067 err = hci_power_control_on(); 4068 if (err != 0) { 4069 log_error("hci_power_control_on() error %d", err); 4070 return err; 4071 } 4072 hci_power_transition_to_initializing(); 4073 break; 4074 case HCI_POWER_OFF: 4075 // do nothing 4076 break; 4077 case HCI_POWER_SLEEP: 4078 // do nothing (with SLEEP == OFF) 4079 break; 4080 default: 4081 btstack_assert(false); 4082 break; 4083 } 4084 return ERROR_CODE_SUCCESS; 4085 } 4086 4087 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4088 switch (power_mode){ 4089 case HCI_POWER_ON: 4090 // do nothing 4091 break; 4092 case HCI_POWER_OFF: 4093 // no connections yet, just turn it off 4094 hci_power_control_off(); 4095 break; 4096 case HCI_POWER_SLEEP: 4097 // no connections yet, just turn it off 4098 hci_power_control_sleep(); 4099 break; 4100 default: 4101 btstack_assert(false); 4102 break; 4103 } 4104 return ERROR_CODE_SUCCESS; 4105 } 4106 4107 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4108 switch (power_mode){ 4109 case HCI_POWER_ON: 4110 // do nothing 4111 break; 4112 case HCI_POWER_OFF: 4113 // see hci_run 4114 hci_stack->state = HCI_STATE_HALTING; 4115 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4116 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4117 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4118 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4119 btstack_run_loop_add_timer(&hci_stack->timeout); 4120 break; 4121 case HCI_POWER_SLEEP: 4122 // see hci_run 4123 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4124 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4125 break; 4126 default: 4127 btstack_assert(false); 4128 break; 4129 } 4130 return ERROR_CODE_SUCCESS; 4131 } 4132 4133 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4134 switch (power_mode){ 4135 case HCI_POWER_ON: 4136 hci_power_transition_to_initializing(); 4137 break; 4138 case HCI_POWER_OFF: 4139 // do nothing 4140 break; 4141 case HCI_POWER_SLEEP: 4142 // see hci_run 4143 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4144 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4145 break; 4146 default: 4147 btstack_assert(false); 4148 break; 4149 } 4150 return ERROR_CODE_SUCCESS; 4151 } 4152 4153 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4154 switch (power_mode){ 4155 case HCI_POWER_ON: 4156 hci_power_transition_to_initializing(); 4157 break; 4158 case HCI_POWER_OFF: 4159 // see hci_run 4160 hci_stack->state = HCI_STATE_HALTING; 4161 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4162 break; 4163 case HCI_POWER_SLEEP: 4164 // do nothing 4165 break; 4166 default: 4167 btstack_assert(false); 4168 break; 4169 } 4170 return ERROR_CODE_SUCCESS; 4171 } 4172 4173 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4174 int err; 4175 switch (power_mode){ 4176 case HCI_POWER_ON: 4177 err = hci_power_control_wake(); 4178 if (err) return err; 4179 hci_power_transition_to_initializing(); 4180 break; 4181 case HCI_POWER_OFF: 4182 hci_stack->state = HCI_STATE_HALTING; 4183 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4184 break; 4185 case HCI_POWER_SLEEP: 4186 // do nothing 4187 break; 4188 default: 4189 btstack_assert(false); 4190 break; 4191 } 4192 return ERROR_CODE_SUCCESS; 4193 } 4194 4195 int hci_power_control(HCI_POWER_MODE power_mode){ 4196 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4197 int err = 0; 4198 switch (hci_stack->state){ 4199 case HCI_STATE_OFF: 4200 err = hci_power_control_state_off(power_mode); 4201 break; 4202 case HCI_STATE_INITIALIZING: 4203 err = hci_power_control_state_initializing(power_mode); 4204 break; 4205 case HCI_STATE_WORKING: 4206 err = hci_power_control_state_working(power_mode); 4207 break; 4208 case HCI_STATE_HALTING: 4209 err = hci_power_control_state_halting(power_mode); 4210 break; 4211 case HCI_STATE_FALLING_ASLEEP: 4212 err = hci_power_control_state_falling_asleep(power_mode); 4213 break; 4214 case HCI_STATE_SLEEPING: 4215 err = hci_power_control_state_sleeping(power_mode); 4216 break; 4217 default: 4218 btstack_assert(false); 4219 break; 4220 } 4221 if (err != 0){ 4222 return err; 4223 } 4224 4225 // create internal event 4226 hci_emit_state(); 4227 4228 // trigger next/first action 4229 hci_run(); 4230 4231 return 0; 4232 } 4233 4234 4235 static void hci_halting_run(void) { 4236 4237 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4238 4239 hci_connection_t *connection; 4240 4241 switch (hci_stack->substate) { 4242 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4243 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4244 4245 #ifdef ENABLE_BLE 4246 #ifdef ENABLE_LE_CENTRAL 4247 hci_whitelist_free(); 4248 #endif 4249 #endif 4250 // close all open connections 4251 connection = (hci_connection_t *) hci_stack->connections; 4252 if (connection) { 4253 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4254 if (!hci_can_send_command_packet_now()) return; 4255 4256 // check state 4257 if (connection->state == SENT_DISCONNECT) return; 4258 connection->state = SENT_DISCONNECT; 4259 4260 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4261 4262 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4263 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4264 4265 // ... which would be ignored anyway as we shutdown (free) the connection now 4266 hci_shutdown_connection(connection); 4267 4268 // finally, send the disconnect command 4269 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4270 return; 4271 } 4272 4273 btstack_run_loop_remove_timer(&hci_stack->timeout); 4274 4275 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4276 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4277 log_info("HCI_STATE_HALTING: wait 50 ms"); 4278 hci_stack->substate = HCI_HALTING_W4_TIMER; 4279 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4280 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4281 btstack_run_loop_add_timer(&hci_stack->timeout); 4282 break; 4283 } 4284 4285 /* fall through */ 4286 4287 case HCI_HALTING_CLOSE: 4288 // close left over connections (that had not been properly closed before) 4289 hci_discard_connections(); 4290 4291 log_info("HCI_STATE_HALTING, calling off"); 4292 4293 // switch mode 4294 hci_power_control_off(); 4295 4296 log_info("HCI_STATE_HALTING, emitting state"); 4297 hci_emit_state(); 4298 log_info("HCI_STATE_HALTING, done"); 4299 break; 4300 4301 case HCI_HALTING_W4_TIMER: 4302 // keep waiting 4303 4304 break; 4305 default: 4306 break; 4307 } 4308 }; 4309 4310 static void hci_falling_asleep_run(void){ 4311 hci_connection_t * connection; 4312 switch(hci_stack->substate) { 4313 case HCI_FALLING_ASLEEP_DISCONNECT: 4314 log_info("HCI_STATE_FALLING_ASLEEP"); 4315 // close all open connections 4316 connection = (hci_connection_t *) hci_stack->connections; 4317 if (connection){ 4318 4319 // send disconnect 4320 if (!hci_can_send_command_packet_now()) return; 4321 4322 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4323 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4324 4325 // send disconnected event right away - causes higher layer connections to get closed, too. 4326 hci_shutdown_connection(connection); 4327 return; 4328 } 4329 4330 if (hci_classic_supported()){ 4331 // disable page and inquiry scan 4332 if (!hci_can_send_command_packet_now()) return; 4333 4334 log_info("HCI_STATE_HALTING, disabling inq scans"); 4335 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4336 4337 // continue in next sub state 4338 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4339 break; 4340 } 4341 4342 /* fall through */ 4343 4344 case HCI_FALLING_ASLEEP_COMPLETE: 4345 log_info("HCI_STATE_HALTING, calling sleep"); 4346 // switch mode 4347 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4348 hci_emit_state(); 4349 break; 4350 4351 default: 4352 break; 4353 } 4354 } 4355 4356 #ifdef ENABLE_CLASSIC 4357 4358 static void hci_update_scan_enable(void){ 4359 // 2 = page scan, 1 = inq scan 4360 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4361 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4362 hci_run(); 4363 } 4364 4365 void gap_discoverable_control(uint8_t enable){ 4366 if (enable) enable = 1; // normalize argument 4367 4368 if (hci_stack->discoverable == enable){ 4369 hci_emit_discoverable_enabled(hci_stack->discoverable); 4370 return; 4371 } 4372 4373 hci_stack->discoverable = enable; 4374 hci_update_scan_enable(); 4375 } 4376 4377 void gap_connectable_control(uint8_t enable){ 4378 if (enable) enable = 1; // normalize argument 4379 4380 // don't emit event 4381 if (hci_stack->connectable == enable) return; 4382 4383 hci_stack->connectable = enable; 4384 hci_update_scan_enable(); 4385 } 4386 #endif 4387 4388 void gap_local_bd_addr(bd_addr_t address_buffer){ 4389 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4390 } 4391 4392 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4393 static void hci_host_num_completed_packets(void){ 4394 4395 // create packet manually as arrays are not supported and num_commands should not get reduced 4396 hci_reserve_packet_buffer(); 4397 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4398 4399 uint16_t size = 0; 4400 uint16_t num_handles = 0; 4401 packet[size++] = 0x35; 4402 packet[size++] = 0x0c; 4403 size++; // skip param len 4404 size++; // skip num handles 4405 4406 // add { handle, packets } entries 4407 btstack_linked_item_t * it; 4408 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4409 hci_connection_t * connection = (hci_connection_t *) it; 4410 if (connection->num_packets_completed){ 4411 little_endian_store_16(packet, size, connection->con_handle); 4412 size += 2; 4413 little_endian_store_16(packet, size, connection->num_packets_completed); 4414 size += 2; 4415 // 4416 num_handles++; 4417 connection->num_packets_completed = 0; 4418 } 4419 } 4420 4421 packet[2] = size - 3; 4422 packet[3] = num_handles; 4423 4424 hci_stack->host_completed_packets = 0; 4425 4426 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4427 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4428 4429 // release packet buffer for synchronous transport implementations 4430 if (hci_transport_synchronous()){ 4431 hci_release_packet_buffer(); 4432 hci_emit_transport_packet_sent(); 4433 } 4434 } 4435 #endif 4436 4437 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4438 UNUSED(ds); 4439 hci_stack->substate = HCI_HALTING_CLOSE; 4440 // allow packet handlers to defer final shutdown 4441 hci_emit_state(); 4442 hci_run(); 4443 } 4444 4445 static bool hci_run_acl_fragments(void){ 4446 if (hci_stack->acl_fragmentation_total_size > 0u) { 4447 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4448 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4449 if (connection) { 4450 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4451 hci_send_acl_packet_fragments(connection); 4452 return true; 4453 } 4454 } else { 4455 // connection gone -> discard further fragments 4456 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4457 hci_stack->acl_fragmentation_total_size = 0; 4458 hci_stack->acl_fragmentation_pos = 0; 4459 } 4460 } 4461 return false; 4462 } 4463 4464 #ifdef ENABLE_CLASSIC 4465 static bool hci_run_general_gap_classic(void){ 4466 4467 // assert stack is working and classic is active 4468 if (hci_classic_supported() == false) return false; 4469 if (hci_stack->state != HCI_STATE_WORKING) return false; 4470 4471 // decline incoming connections 4472 if (hci_stack->decline_reason){ 4473 uint8_t reason = hci_stack->decline_reason; 4474 hci_stack->decline_reason = 0; 4475 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4476 return true; 4477 } 4478 4479 if (hci_stack->gap_tasks_classic != 0){ 4480 hci_run_gap_tasks_classic(); 4481 return true; 4482 } 4483 4484 // start/stop inquiry 4485 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4486 uint8_t duration = hci_stack->inquiry_state; 4487 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4488 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4489 return true; 4490 } 4491 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4492 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4493 hci_send_cmd(&hci_inquiry_cancel); 4494 return true; 4495 } 4496 // remote name request 4497 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4498 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4499 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4500 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4501 return true; 4502 } 4503 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4504 // Local OOB data 4505 if (hci_stack->classic_read_local_oob_data){ 4506 hci_stack->classic_read_local_oob_data = false; 4507 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4508 hci_send_cmd(&hci_read_local_extended_oob_data); 4509 } else { 4510 hci_send_cmd(&hci_read_local_oob_data); 4511 } 4512 } 4513 #endif 4514 // pairing 4515 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4516 uint8_t state = hci_stack->gap_pairing_state; 4517 uint8_t pin_code[16]; 4518 switch (state){ 4519 case GAP_PAIRING_STATE_SEND_PIN: 4520 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4521 memset(pin_code, 0, 16); 4522 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4523 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4524 break; 4525 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4526 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4527 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4528 break; 4529 case GAP_PAIRING_STATE_SEND_PASSKEY: 4530 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4531 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4532 break; 4533 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4534 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4535 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4536 break; 4537 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4538 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4539 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4540 break; 4541 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4542 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4543 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4544 break; 4545 default: 4546 break; 4547 } 4548 return true; 4549 } 4550 return false; 4551 } 4552 #endif 4553 4554 #ifdef ENABLE_BLE 4555 static bool hci_run_general_gap_le(void){ 4556 4557 // Phase 1: collect what to stop 4558 4559 bool scanning_stop = false; 4560 bool connecting_stop = false; 4561 bool advertising_stop = false; 4562 4563 #ifndef ENABLE_LE_CENTRAL 4564 UNUSED(scanning_stop); 4565 UNUSED(connecting_stop); 4566 #endif 4567 #ifndef ENABLE_LE_PERIPHERAL 4568 UNUSED(advertising_stop); 4569 #endif 4570 4571 // check if own address changes 4572 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4573 4574 // check if whitelist needs modification 4575 bool whitelist_modification_pending = false; 4576 btstack_linked_list_iterator_t lit; 4577 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4578 while (btstack_linked_list_iterator_has_next(&lit)){ 4579 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4580 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4581 whitelist_modification_pending = true; 4582 break; 4583 } 4584 } 4585 // check if resolving list needs modification 4586 bool resolving_list_modification_pending = false; 4587 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4588 4589 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4590 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4591 resolving_list_modification_pending = true; 4592 } 4593 #endif 4594 4595 #ifdef ENABLE_LE_CENTRAL 4596 // scanning control 4597 if (hci_stack->le_scanning_active) { 4598 // stop if: 4599 // - parameter change required 4600 // - it's disabled 4601 // - whitelist change required but used for scanning 4602 // - resolving list modified 4603 // - own address changes 4604 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4605 if ((hci_stack->le_scanning_param_update) || 4606 !hci_stack->le_scanning_enabled || 4607 scanning_uses_whitelist || 4608 resolving_list_modification_pending || 4609 random_address_change){ 4610 4611 scanning_stop = true; 4612 } 4613 } 4614 #endif 4615 4616 #ifdef ENABLE_LE_CENTRAL 4617 // connecting control 4618 bool connecting_with_whitelist; 4619 switch (hci_stack->le_connecting_state){ 4620 case LE_CONNECTING_DIRECT: 4621 case LE_CONNECTING_WHITELIST: 4622 // stop connecting if: 4623 // - connecting uses white and whitelist modification pending 4624 // - if it got disabled 4625 // - resolving list modified 4626 // - own address changes 4627 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4628 if ((connecting_with_whitelist && whitelist_modification_pending) || 4629 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4630 resolving_list_modification_pending || 4631 random_address_change) { 4632 4633 connecting_stop = true; 4634 } 4635 break; 4636 default: 4637 break; 4638 } 4639 #endif 4640 4641 #ifdef ENABLE_LE_PERIPHERAL 4642 // le advertisement control 4643 if (hci_stack->le_advertisements_active){ 4644 // stop if: 4645 // - parameter change required 4646 // - random address used in advertising and changes 4647 // - it's disabled 4648 // - whitelist change required but used for advertisement filter policy 4649 // - resolving list modified 4650 // - own address changes 4651 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4652 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4653 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4654 if (advertising_change || 4655 (advertising_uses_random_address && random_address_change) || 4656 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4657 (advertising_uses_whitelist && whitelist_modification_pending) || 4658 resolving_list_modification_pending || 4659 random_address_change) { 4660 4661 advertising_stop = true; 4662 } 4663 } 4664 #endif 4665 4666 4667 // Phase 2: stop everything that should be off during modifications 4668 4669 #ifdef ENABLE_LE_CENTRAL 4670 if (scanning_stop){ 4671 hci_stack->le_scanning_active = false; 4672 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4673 if (hci_extended_advertising_supported()) { 4674 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4675 } else 4676 #endif 4677 { 4678 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4679 } 4680 return true; 4681 } 4682 #endif 4683 4684 #ifdef ENABLE_LE_CENTRAL 4685 if (connecting_stop){ 4686 hci_send_cmd(&hci_le_create_connection_cancel); 4687 return true; 4688 } 4689 #endif 4690 4691 #ifdef ENABLE_LE_PERIPHERAL 4692 if (advertising_stop){ 4693 hci_stack->le_advertisements_active = false; 4694 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4695 return true; 4696 } 4697 #endif 4698 4699 // Phase 3: modify 4700 4701 if (random_address_change){ 4702 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4703 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4704 return true; 4705 } 4706 4707 #ifdef ENABLE_LE_CENTRAL 4708 if (hci_stack->le_scanning_param_update){ 4709 hci_stack->le_scanning_param_update = false; 4710 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4711 if (hci_extended_advertising_supported()){ 4712 // prepare arrays for all PHYs 4713 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 4714 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 4715 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 4716 uint8_t scanning_phys = 1; // LE 1M PHY 4717 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 4718 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 4719 } else 4720 #endif 4721 { 4722 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4723 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4724 } 4725 return true; 4726 } 4727 #endif 4728 4729 #ifdef ENABLE_LE_PERIPHERAL 4730 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4731 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4732 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4733 hci_send_cmd(&hci_le_set_advertising_parameters, 4734 hci_stack->le_advertisements_interval_min, 4735 hci_stack->le_advertisements_interval_max, 4736 hci_stack->le_advertisements_type, 4737 hci_stack->le_advertisements_own_addr_type, 4738 hci_stack->le_advertisements_direct_address_type, 4739 hci_stack->le_advertisements_direct_address, 4740 hci_stack->le_advertisements_channel_map, 4741 hci_stack->le_advertisements_filter_policy); 4742 return true; 4743 } 4744 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4745 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4746 uint8_t adv_data_clean[31]; 4747 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4748 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4749 hci_stack->le_advertisements_data_len); 4750 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4751 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4752 return true; 4753 } 4754 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4755 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4756 uint8_t scan_data_clean[31]; 4757 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4758 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4759 hci_stack->le_scan_response_data_len); 4760 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4761 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4762 return true; 4763 } 4764 #endif 4765 4766 4767 #ifdef ENABLE_LE_CENTRAL 4768 // if connect with whitelist was active and is not cancelled yet, wait until next time 4769 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4770 #endif 4771 4772 // LE Whitelist Management 4773 if (whitelist_modification_pending){ 4774 // add/remove entries 4775 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4776 while (btstack_linked_list_iterator_has_next(&lit)){ 4777 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4778 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4779 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4780 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4781 return true; 4782 } 4783 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4784 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4785 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4786 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4787 return true; 4788 } 4789 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4790 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4791 btstack_memory_whitelist_entry_free(entry); 4792 } 4793 } 4794 } 4795 4796 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4797 // LE Resolving List Management 4798 if (resolving_list_supported) { 4799 uint16_t i; 4800 switch (hci_stack->le_resolving_list_state) { 4801 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4802 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4803 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4804 return true; 4805 case LE_RESOLVING_LIST_READ_SIZE: 4806 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4807 hci_send_cmd(&hci_le_read_resolving_list_size); 4808 return true; 4809 case LE_RESOLVING_LIST_SEND_CLEAR: 4810 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4811 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4812 sizeof(hci_stack->le_resolving_list_add_entries)); 4813 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4814 sizeof(hci_stack->le_resolving_list_remove_entries)); 4815 hci_send_cmd(&hci_le_clear_resolving_list); 4816 return true; 4817 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4818 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4819 uint8_t offset = i >> 3; 4820 uint8_t mask = 1 << (i & 7); 4821 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4822 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4823 bd_addr_t peer_identity_addreses; 4824 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4825 sm_key_t peer_irk; 4826 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4827 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4828 4829 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4830 // trigger whitelist entry 'update' (work around for controller bug) 4831 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4832 while (btstack_linked_list_iterator_has_next(&lit)) { 4833 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4834 if (entry->address_type != peer_identity_addr_type) continue; 4835 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4836 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4837 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4838 } 4839 #endif 4840 4841 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4842 peer_identity_addreses); 4843 return true; 4844 } 4845 4846 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4847 4848 /* fall through */ 4849 4850 case LE_RESOLVING_LIST_ADD_ENTRIES: 4851 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4852 uint8_t offset = i >> 3; 4853 uint8_t mask = 1 << (i & 7); 4854 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4855 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4856 bd_addr_t peer_identity_addreses; 4857 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4858 sm_key_t peer_irk; 4859 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4860 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4861 const uint8_t *local_irk = gap_get_persistent_irk(); 4862 // command uses format specifier 'P' that stores 16-byte value without flip 4863 uint8_t local_irk_flipped[16]; 4864 uint8_t peer_irk_flipped[16]; 4865 reverse_128(local_irk, local_irk_flipped); 4866 reverse_128(peer_irk, peer_irk_flipped); 4867 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4868 peer_irk_flipped, local_irk_flipped); 4869 return true; 4870 } 4871 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4872 break; 4873 4874 default: 4875 break; 4876 } 4877 } 4878 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4879 #endif 4880 4881 // post-pone all actions until stack is fully working 4882 if (hci_stack->state != HCI_STATE_WORKING) return false; 4883 4884 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4885 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4886 4887 // Phase 4: restore state 4888 4889 #ifdef ENABLE_LE_CENTRAL 4890 // re-start scanning 4891 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4892 hci_stack->le_scanning_active = true; 4893 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4894 if (hci_extended_advertising_supported()){ 4895 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 4896 } else 4897 #endif 4898 { 4899 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4900 } 4901 return true; 4902 } 4903 #endif 4904 4905 #ifdef ENABLE_LE_CENTRAL 4906 // re-start connecting 4907 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4908 bd_addr_t null_addr; 4909 memset(null_addr, 0, 6); 4910 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4911 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4912 hci_send_cmd(&hci_le_create_connection, 4913 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4914 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4915 1, // use whitelist 4916 0, // peer address type 4917 null_addr, // peer bd addr 4918 hci_stack->le_connection_own_addr_type, // our addr type: 4919 hci_stack->le_connection_interval_min, // conn interval min 4920 hci_stack->le_connection_interval_max, // conn interval max 4921 hci_stack->le_connection_latency, // conn latency 4922 hci_stack->le_supervision_timeout, // conn latency 4923 hci_stack->le_minimum_ce_length, // min ce length 4924 hci_stack->le_maximum_ce_length // max ce length 4925 ); 4926 return true; 4927 } 4928 #endif 4929 4930 #ifdef ENABLE_LE_PERIPHERAL 4931 // re-start advertising 4932 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4933 // check if advertisements should be enabled given 4934 hci_stack->le_advertisements_active = true; 4935 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4936 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4937 return true; 4938 } 4939 #endif 4940 4941 return false; 4942 } 4943 #endif 4944 4945 static bool hci_run_general_pending_commands(void){ 4946 btstack_linked_item_t * it; 4947 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4948 hci_connection_t * connection = (hci_connection_t *) it; 4949 4950 switch(connection->state){ 4951 case SEND_CREATE_CONNECTION: 4952 switch(connection->address_type){ 4953 #ifdef ENABLE_CLASSIC 4954 case BD_ADDR_TYPE_ACL: 4955 log_info("sending hci_create_connection"); 4956 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4957 break; 4958 #endif 4959 default: 4960 #ifdef ENABLE_BLE 4961 #ifdef ENABLE_LE_CENTRAL 4962 log_info("sending hci_le_create_connection"); 4963 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4964 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4965 hci_send_cmd(&hci_le_create_connection, 4966 hci_stack->le_connection_scan_interval, // conn scan interval 4967 hci_stack->le_connection_scan_window, // conn scan windows 4968 0, // don't use whitelist 4969 connection->address_type, // peer address type 4970 connection->address, // peer bd addr 4971 hci_stack->le_connection_own_addr_type, // our addr type: 4972 hci_stack->le_connection_interval_min, // conn interval min 4973 hci_stack->le_connection_interval_max, // conn interval max 4974 hci_stack->le_connection_latency, // conn latency 4975 hci_stack->le_supervision_timeout, // conn latency 4976 hci_stack->le_minimum_ce_length, // min ce length 4977 hci_stack->le_maximum_ce_length // max ce length 4978 ); 4979 connection->state = SENT_CREATE_CONNECTION; 4980 #endif 4981 #endif 4982 break; 4983 } 4984 return true; 4985 4986 #ifdef ENABLE_CLASSIC 4987 case RECEIVED_CONNECTION_REQUEST: 4988 connection->role = HCI_ROLE_SLAVE; 4989 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4990 log_info("sending hci_accept_connection_request"); 4991 connection->state = ACCEPTED_CONNECTION_REQUEST; 4992 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4993 return true; 4994 } 4995 break; 4996 #endif 4997 4998 #ifdef ENABLE_BLE 4999 #ifdef ENABLE_LE_CENTRAL 5000 case SEND_CANCEL_CONNECTION: 5001 connection->state = SENT_CANCEL_CONNECTION; 5002 hci_send_cmd(&hci_le_create_connection_cancel); 5003 return true; 5004 #endif 5005 #endif 5006 case SEND_DISCONNECT: 5007 connection->state = SENT_DISCONNECT; 5008 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5009 return true; 5010 5011 default: 5012 break; 5013 } 5014 5015 // no further commands if connection is about to get shut down 5016 if (connection->state == SENT_DISCONNECT) continue; 5017 5018 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 5019 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 5020 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5021 return true; 5022 } 5023 5024 #ifdef ENABLE_CLASSIC 5025 5026 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 5027 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 5028 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5029 return true; 5030 } 5031 5032 // Handling link key request requires remote supported features 5033 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5034 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5035 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5036 5037 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5038 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5039 if (have_link_key && security_level_sufficient){ 5040 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5041 } else { 5042 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5043 } 5044 return true; 5045 } 5046 5047 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5048 log_info("denying to pin request"); 5049 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5050 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5051 return true; 5052 } 5053 5054 // security assessment requires remote features 5055 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5056 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5057 hci_ssp_assess_security_on_io_cap_request(connection); 5058 // 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 5059 } 5060 5061 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5062 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5063 // set authentication requirements: 5064 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5065 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5066 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5067 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5068 authreq |= 1; 5069 } 5070 bool bonding = hci_stack->bondable; 5071 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5072 // if we have received IO Cap Response, we're in responder role 5073 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5074 if (bonding && !remote_bonding){ 5075 log_info("Remote not bonding, dropping local flag"); 5076 bonding = false; 5077 } 5078 } 5079 if (bonding){ 5080 if (connection->bonding_flags & BONDING_DEDICATED){ 5081 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5082 } else { 5083 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5084 } 5085 } 5086 uint8_t have_oob_data = 0; 5087 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5088 if (connection->classic_oob_c_192 != NULL){ 5089 have_oob_data |= 1; 5090 } 5091 if (connection->classic_oob_c_256 != NULL){ 5092 have_oob_data |= 2; 5093 } 5094 #endif 5095 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5096 return true; 5097 } 5098 5099 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5100 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5101 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5102 return true; 5103 } 5104 5105 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5106 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5107 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5108 const uint8_t zero[16] = { 0 }; 5109 const uint8_t * r_192 = zero; 5110 const uint8_t * c_192 = zero; 5111 const uint8_t * r_256 = zero; 5112 const uint8_t * c_256 = zero; 5113 // verify P-256 OOB 5114 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5115 c_256 = connection->classic_oob_c_256; 5116 if (connection->classic_oob_r_256 != NULL) { 5117 r_256 = connection->classic_oob_r_256; 5118 } 5119 } 5120 // verify P-192 OOB 5121 if ((connection->classic_oob_c_192 != NULL)) { 5122 c_192 = connection->classic_oob_c_192; 5123 if (connection->classic_oob_r_192 != NULL) { 5124 r_192 = connection->classic_oob_r_192; 5125 } 5126 } 5127 5128 // assess security 5129 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5130 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5131 if (need_level_4 && !can_reach_level_4){ 5132 log_info("Level 4 required, but not possible -> abort"); 5133 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5134 // send oob negative reply 5135 c_256 = NULL; 5136 c_192 = NULL; 5137 } 5138 5139 // Reply 5140 if (c_256 != zero) { 5141 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5142 } else if (c_192 != zero){ 5143 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5144 } else { 5145 hci_stack->classic_oob_con_handle = connection->con_handle; 5146 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5147 } 5148 return true; 5149 } 5150 #endif 5151 5152 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5153 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5154 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5155 return true; 5156 } 5157 5158 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5159 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5160 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5161 return true; 5162 } 5163 5164 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5165 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5166 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5167 return true; 5168 } 5169 5170 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5171 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5172 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5173 connection->state = SENT_DISCONNECT; 5174 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5175 return true; 5176 } 5177 5178 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5179 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5180 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5181 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5182 return true; 5183 } 5184 5185 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5186 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5187 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5188 return true; 5189 } 5190 5191 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5192 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5193 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5194 return true; 5195 } 5196 5197 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5198 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5199 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5200 return true; 5201 } 5202 5203 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5204 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5205 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5206 return true; 5207 } 5208 5209 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5210 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5211 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5212 return true; 5213 } 5214 #endif 5215 5216 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5217 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5218 #ifdef ENABLE_CLASSIC 5219 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5220 #endif 5221 if (connection->state != SENT_DISCONNECT){ 5222 connection->state = SENT_DISCONNECT; 5223 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5224 return true; 5225 } 5226 } 5227 5228 #ifdef ENABLE_CLASSIC 5229 uint16_t sniff_min_interval; 5230 switch (connection->sniff_min_interval){ 5231 case 0: 5232 break; 5233 case 0xffff: 5234 connection->sniff_min_interval = 0; 5235 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5236 return true; 5237 default: 5238 sniff_min_interval = connection->sniff_min_interval; 5239 connection->sniff_min_interval = 0; 5240 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5241 return true; 5242 } 5243 5244 if (connection->sniff_subrating_max_latency != 0xffff){ 5245 uint16_t max_latency = connection->sniff_subrating_max_latency; 5246 connection->sniff_subrating_max_latency = 0; 5247 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5248 return true; 5249 } 5250 5251 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5252 uint8_t service_type = (uint8_t) connection->qos_service_type; 5253 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5254 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); 5255 return true; 5256 } 5257 5258 if (connection->request_role != HCI_ROLE_INVALID){ 5259 hci_role_t role = connection->request_role; 5260 connection->request_role = HCI_ROLE_INVALID; 5261 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5262 return true; 5263 } 5264 #endif 5265 5266 #ifdef ENABLE_BLE 5267 switch (connection->le_con_parameter_update_state){ 5268 // response to L2CAP CON PARAMETER UPDATE REQUEST 5269 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5270 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5271 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5272 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5273 0x0000, 0xffff); 5274 return true; 5275 case CON_PARAMETER_UPDATE_REPLY: 5276 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5277 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5278 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5279 0x0000, 0xffff); 5280 return true; 5281 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5282 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5283 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5284 return true; 5285 default: 5286 break; 5287 } 5288 if (connection->le_phy_update_all_phys != 0xffu){ 5289 uint8_t all_phys = connection->le_phy_update_all_phys; 5290 connection->le_phy_update_all_phys = 0xff; 5291 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); 5292 return true; 5293 } 5294 #endif 5295 } 5296 return false; 5297 } 5298 5299 static void hci_run(void){ 5300 5301 // stack state sub statemachines 5302 // halting needs to be called even if we cannot send command packet now 5303 switch (hci_stack->state) { 5304 case HCI_STATE_INITIALIZING: 5305 hci_initializing_run(); 5306 break; 5307 case HCI_STATE_HALTING: 5308 hci_halting_run(); 5309 break; 5310 case HCI_STATE_FALLING_ASLEEP: 5311 hci_falling_asleep_run(); 5312 break; 5313 default: 5314 break; 5315 } 5316 5317 bool done; 5318 5319 // send continuation fragments first, as they block the prepared packet buffer 5320 done = hci_run_acl_fragments(); 5321 if (done) return; 5322 5323 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5324 // send host num completed packets next as they don't require num_cmd_packets > 0 5325 if (!hci_can_send_comand_packet_transport()) return; 5326 if (hci_stack->host_completed_packets){ 5327 hci_host_num_completed_packets(); 5328 return; 5329 } 5330 #endif 5331 5332 if (!hci_can_send_command_packet_now()) return; 5333 5334 // global/non-connection oriented commands 5335 5336 5337 #ifdef ENABLE_CLASSIC 5338 // general gap classic 5339 done = hci_run_general_gap_classic(); 5340 if (done) return; 5341 #endif 5342 5343 #ifdef ENABLE_BLE 5344 // general gap le 5345 done = hci_run_general_gap_le(); 5346 if (done) return; 5347 #endif 5348 5349 // send pending HCI commands 5350 hci_run_general_pending_commands(); 5351 } 5352 5353 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5354 // house-keeping 5355 5356 #ifdef ENABLE_CLASSIC 5357 bd_addr_t addr; 5358 hci_connection_t * conn; 5359 #endif 5360 #ifdef ENABLE_LE_CENTRAL 5361 uint8_t initiator_filter_policy; 5362 #endif 5363 5364 uint16_t opcode = little_endian_read_16(packet, 0); 5365 switch (opcode) { 5366 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5367 hci_stack->loopback_mode = packet[3]; 5368 break; 5369 5370 #ifdef ENABLE_CLASSIC 5371 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5372 reverse_bd_addr(&packet[3], addr); 5373 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5374 5375 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5376 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5377 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5378 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5379 } 5380 5381 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5382 if (!conn) { 5383 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5384 if (!conn) { 5385 // notify client that alloc failed 5386 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5387 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5388 } 5389 conn->state = SEND_CREATE_CONNECTION; 5390 conn->role = HCI_ROLE_MASTER; 5391 } 5392 5393 conn->con_handle = HCI_CON_HANDLE_INVALID; 5394 conn->role = HCI_ROLE_INVALID; 5395 5396 log_info("conn state %u", conn->state); 5397 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5398 switch (conn->state) { 5399 // if connection active exists 5400 case OPEN: 5401 // and OPEN, emit connection complete command 5402 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5403 // packet not sent to controller 5404 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5405 case RECEIVED_DISCONNECTION_COMPLETE: 5406 // create connection triggered in disconnect complete event, let's do it now 5407 break; 5408 case SEND_CREATE_CONNECTION: 5409 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5410 break; 5411 default: 5412 // otherwise, just ignore as it is already in the open process 5413 // packet not sent to controller 5414 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5415 } 5416 conn->state = SENT_CREATE_CONNECTION; 5417 5418 // track outgoing connection 5419 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5420 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5421 break; 5422 5423 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5424 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5425 // setup_synchronous_connection? Voice setting at offset 22 5426 // TODO: compare to current setting if sco connection already active 5427 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5428 break; 5429 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5430 // accept_synchronous_connection? Voice setting at offset 18 5431 // TODO: compare to current setting if sco connection already active 5432 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5433 // track outgoing connection 5434 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5435 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5436 break; 5437 #endif 5438 #endif 5439 5440 #ifdef ENABLE_BLE 5441 #ifdef ENABLE_LE_CENTRAL 5442 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5443 // white list used? 5444 initiator_filter_policy = packet[7]; 5445 switch (initiator_filter_policy) { 5446 case 0: 5447 // whitelist not used 5448 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5449 break; 5450 case 1: 5451 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5452 break; 5453 default: 5454 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5455 break; 5456 } 5457 // track outgoing connection 5458 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5459 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5460 break; 5461 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5462 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5463 break; 5464 #endif 5465 #endif 5466 default: 5467 break; 5468 } 5469 5470 hci_stack->num_cmd_packets--; 5471 5472 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5473 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5474 if (err != 0){ 5475 return ERROR_CODE_HARDWARE_FAILURE; 5476 } 5477 return ERROR_CODE_SUCCESS; 5478 } 5479 5480 // disconnect because of security block 5481 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5482 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5483 if (!connection) return; 5484 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5485 } 5486 5487 5488 // Configure Secure Simple Pairing 5489 5490 #ifdef ENABLE_CLASSIC 5491 5492 // enable will enable SSP during init 5493 void gap_ssp_set_enable(int enable){ 5494 hci_stack->ssp_enable = enable; 5495 } 5496 5497 static int hci_local_ssp_activated(void){ 5498 return gap_ssp_supported() && hci_stack->ssp_enable; 5499 } 5500 5501 // if set, BTstack will respond to io capability request using authentication requirement 5502 void gap_ssp_set_io_capability(int io_capability){ 5503 hci_stack->ssp_io_capability = io_capability; 5504 } 5505 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5506 hci_stack->ssp_authentication_requirement = authentication_requirement; 5507 } 5508 5509 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5510 void gap_ssp_set_auto_accept(int auto_accept){ 5511 hci_stack->ssp_auto_accept = auto_accept; 5512 } 5513 5514 void gap_secure_connections_enable(bool enable){ 5515 hci_stack->secure_connections_enable = enable; 5516 } 5517 5518 #endif 5519 5520 // va_list part of hci_send_cmd 5521 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5522 if (!hci_can_send_command_packet_now()){ 5523 log_error("hci_send_cmd called but cannot send packet now"); 5524 return ERROR_CODE_COMMAND_DISALLOWED; 5525 } 5526 5527 // for HCI INITIALIZATION 5528 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5529 hci_stack->last_cmd_opcode = cmd->opcode; 5530 5531 hci_reserve_packet_buffer(); 5532 uint8_t * packet = hci_stack->hci_packet_buffer; 5533 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5534 uint8_t status = hci_send_cmd_packet(packet, size); 5535 5536 // release packet buffer on error or for synchronous transport implementations 5537 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5538 hci_release_packet_buffer(); 5539 hci_emit_transport_packet_sent(); 5540 } 5541 5542 return status; 5543 } 5544 5545 /** 5546 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5547 */ 5548 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5549 va_list argptr; 5550 va_start(argptr, cmd); 5551 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5552 va_end(argptr); 5553 return status; 5554 } 5555 5556 // Create various non-HCI events. 5557 // TODO: generalize, use table similar to hci_create_command 5558 5559 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5560 // dump packet 5561 if (dump) { 5562 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5563 } 5564 5565 // dispatch to all event handlers 5566 btstack_linked_list_iterator_t it; 5567 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5568 while (btstack_linked_list_iterator_has_next(&it)){ 5569 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5570 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5571 } 5572 } 5573 5574 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5575 if (!hci_stack->acl_packet_handler) return; 5576 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5577 } 5578 5579 #ifdef ENABLE_CLASSIC 5580 static void hci_notify_if_sco_can_send_now(void){ 5581 // notify SCO sender if waiting 5582 if (!hci_stack->sco_waiting_for_can_send_now) return; 5583 if (hci_can_send_sco_packet_now()){ 5584 hci_stack->sco_waiting_for_can_send_now = 0; 5585 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5586 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5587 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5588 } 5589 } 5590 5591 // parsing end emitting has been merged to reduce code size 5592 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5593 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5594 5595 uint8_t * eir_data; 5596 ad_context_t context; 5597 const uint8_t * name; 5598 uint8_t name_len; 5599 5600 if (size < 3) return; 5601 5602 int event_type = hci_event_packet_get_type(packet); 5603 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5604 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5605 5606 switch (event_type){ 5607 case HCI_EVENT_INQUIRY_RESULT: 5608 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5609 if (size != (3 + (num_responses * 14))) return; 5610 break; 5611 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5612 if (size != 257) return; 5613 if (num_responses != 1) return; 5614 break; 5615 default: 5616 return; 5617 } 5618 5619 // event[1] is set at the end 5620 int i; 5621 for (i=0; i<num_responses;i++){ 5622 memset(event, 0, sizeof(event)); 5623 event[0] = GAP_EVENT_INQUIRY_RESULT; 5624 uint8_t event_size = 27; // if name is not set by EIR 5625 5626 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5627 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5628 (void)memcpy(&event[9], 5629 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5630 3); // class of device 5631 (void)memcpy(&event[12], 5632 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5633 2); // clock offset 5634 5635 switch (event_type){ 5636 case HCI_EVENT_INQUIRY_RESULT: 5637 // 14,15,16,17 = 0, size 18 5638 break; 5639 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5640 event[14] = 1; 5641 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5642 // 16,17 = 0, size 18 5643 break; 5644 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5645 event[14] = 1; 5646 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5647 // EIR packets only contain a single inquiry response 5648 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5649 name = NULL; 5650 // Iterate over EIR data 5651 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5652 uint8_t data_type = ad_iterator_get_data_type(&context); 5653 uint8_t data_size = ad_iterator_get_data_len(&context); 5654 const uint8_t * data = ad_iterator_get_data(&context); 5655 // Prefer Complete Local Name over Shortened Local Name 5656 switch (data_type){ 5657 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5658 if (name) continue; 5659 /* fall through */ 5660 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5661 name = data; 5662 name_len = data_size; 5663 break; 5664 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5665 if (data_size != 8) break; 5666 event[16] = 1; 5667 memcpy(&event[17], data, 8); 5668 break; 5669 default: 5670 break; 5671 } 5672 } 5673 if (name){ 5674 event[25] = 1; 5675 // truncate name if needed 5676 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5677 event[26] = len; 5678 (void)memcpy(&event[27], name, len); 5679 event_size += len; 5680 } 5681 break; 5682 default: 5683 return; 5684 } 5685 event[1] = event_size - 2; 5686 hci_emit_event(event, event_size, 1); 5687 } 5688 } 5689 #endif 5690 5691 void hci_emit_state(void){ 5692 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5693 uint8_t event[3]; 5694 event[0] = BTSTACK_EVENT_STATE; 5695 event[1] = sizeof(event) - 2u; 5696 event[2] = hci_stack->state; 5697 hci_emit_event(event, sizeof(event), 1); 5698 } 5699 5700 #ifdef ENABLE_CLASSIC 5701 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5702 uint8_t event[13]; 5703 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5704 event[1] = sizeof(event) - 2; 5705 event[2] = status; 5706 little_endian_store_16(event, 3, con_handle); 5707 reverse_bd_addr(address, &event[5]); 5708 event[11] = 1; // ACL connection 5709 event[12] = 0; // encryption disabled 5710 hci_emit_event(event, sizeof(event), 1); 5711 } 5712 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5713 if (disable_l2cap_timeouts) return; 5714 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5715 uint8_t event[4]; 5716 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5717 event[1] = sizeof(event) - 2; 5718 little_endian_store_16(event, 2, conn->con_handle); 5719 hci_emit_event(event, sizeof(event), 1); 5720 } 5721 #endif 5722 5723 #ifdef ENABLE_BLE 5724 #ifdef ENABLE_LE_CENTRAL 5725 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){ 5726 uint8_t event[21]; 5727 event[0] = HCI_EVENT_LE_META; 5728 event[1] = sizeof(event) - 2u; 5729 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5730 event[3] = status; 5731 little_endian_store_16(event, 4, con_handle); 5732 event[6] = 0; // TODO: role 5733 event[7] = address_type; 5734 reverse_bd_addr(address, &event[8]); 5735 little_endian_store_16(event, 14, 0); // interval 5736 little_endian_store_16(event, 16, 0); // latency 5737 little_endian_store_16(event, 18, 0); // supervision timeout 5738 event[20] = 0; // master clock accuracy 5739 hci_emit_event(event, sizeof(event), 1); 5740 } 5741 #endif 5742 #endif 5743 5744 static void hci_emit_transport_packet_sent(void){ 5745 // notify upper stack that it might be possible to send again 5746 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5747 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5748 } 5749 5750 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5751 uint8_t event[6]; 5752 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5753 event[1] = sizeof(event) - 2u; 5754 event[2] = 0; // status = OK 5755 little_endian_store_16(event, 3, con_handle); 5756 event[5] = reason; 5757 hci_emit_event(event, sizeof(event), 1); 5758 } 5759 5760 static void hci_emit_nr_connections_changed(void){ 5761 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5762 uint8_t event[3]; 5763 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5764 event[1] = sizeof(event) - 2u; 5765 event[2] = nr_hci_connections(); 5766 hci_emit_event(event, sizeof(event), 1); 5767 } 5768 5769 static void hci_emit_hci_open_failed(void){ 5770 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5771 uint8_t event[2]; 5772 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5773 event[1] = sizeof(event) - 2u; 5774 hci_emit_event(event, sizeof(event), 1); 5775 } 5776 5777 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5778 log_info("hci_emit_dedicated_bonding_result %u ", status); 5779 uint8_t event[9]; 5780 int pos = 0; 5781 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5782 event[pos++] = sizeof(event) - 2u; 5783 event[pos++] = status; 5784 reverse_bd_addr(address, &event[pos]); 5785 hci_emit_event(event, sizeof(event), 1); 5786 } 5787 5788 5789 #ifdef ENABLE_CLASSIC 5790 5791 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5792 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5793 uint8_t event[5]; 5794 int pos = 0; 5795 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5796 event[pos++] = sizeof(event) - 2; 5797 little_endian_store_16(event, 2, con_handle); 5798 pos += 2; 5799 event[pos++] = level; 5800 hci_emit_event(event, sizeof(event), 1); 5801 } 5802 5803 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5804 if (!connection) return LEVEL_0; 5805 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5806 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5807 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5808 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5809 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5810 // LEVEL 4 always requires 128 bit encrytion key size 5811 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5812 security_level = LEVEL_3; 5813 } 5814 return security_level; 5815 } 5816 5817 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5818 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5819 uint8_t event[3]; 5820 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5821 event[1] = sizeof(event) - 2; 5822 event[2] = enabled; 5823 hci_emit_event(event, sizeof(event), 1); 5824 } 5825 5826 // query if remote side supports eSCO 5827 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5828 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5829 if (!connection) return false; 5830 return (connection->remote_supported_features[0] & 1) != 0; 5831 } 5832 5833 static bool hci_ssp_supported(hci_connection_t * connection){ 5834 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5835 return (connection->bonding_flags & mask) == mask; 5836 } 5837 5838 // query if remote side supports SSP 5839 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5840 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5841 if (!connection) return false; 5842 return hci_ssp_supported(connection) ? 1 : 0; 5843 } 5844 5845 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5846 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5847 } 5848 5849 /** 5850 * Check if remote supported features query has completed 5851 */ 5852 bool hci_remote_features_available(hci_con_handle_t handle){ 5853 hci_connection_t * connection = hci_connection_for_handle(handle); 5854 if (!connection) return false; 5855 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5856 } 5857 5858 /** 5859 * Trigger remote supported features query 5860 */ 5861 5862 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5863 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5864 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5865 } 5866 } 5867 5868 void hci_remote_features_query(hci_con_handle_t con_handle){ 5869 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5870 if (!connection) return; 5871 hci_trigger_remote_features_for_connection(connection); 5872 hci_run(); 5873 } 5874 5875 // GAP API 5876 /** 5877 * @bbrief enable/disable bonding. default is enabled 5878 * @praram enabled 5879 */ 5880 void gap_set_bondable_mode(int enable){ 5881 hci_stack->bondable = enable ? 1 : 0; 5882 } 5883 /** 5884 * @brief Get bondable mode. 5885 * @return 1 if bondable 5886 */ 5887 int gap_get_bondable_mode(void){ 5888 return hci_stack->bondable; 5889 } 5890 5891 /** 5892 * @brief map link keys to security levels 5893 */ 5894 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5895 switch (link_key_type){ 5896 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5897 return LEVEL_4; 5898 case COMBINATION_KEY: 5899 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5900 return LEVEL_3; 5901 default: 5902 return LEVEL_2; 5903 } 5904 } 5905 5906 /** 5907 * @brief map link keys to secure connection yes/no 5908 */ 5909 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5910 switch (link_key_type){ 5911 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5912 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5913 return true; 5914 default: 5915 return false; 5916 } 5917 } 5918 5919 /** 5920 * @brief map link keys to authenticated 5921 */ 5922 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5923 switch (link_key_type){ 5924 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5925 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5926 return true; 5927 default: 5928 return false; 5929 } 5930 } 5931 5932 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5933 log_info("gap_mitm_protection_required_for_security_level %u", level); 5934 return level > LEVEL_2; 5935 } 5936 5937 /** 5938 * @brief get current security level 5939 */ 5940 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5941 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5942 if (!connection) return LEVEL_0; 5943 return gap_security_level_for_connection(connection); 5944 } 5945 5946 /** 5947 * @brief request connection to device to 5948 * @result GAP_AUTHENTICATION_RESULT 5949 */ 5950 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5951 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5952 if (!connection){ 5953 hci_emit_security_level(con_handle, LEVEL_0); 5954 return; 5955 } 5956 5957 btstack_assert(hci_is_le_connection(connection) == false); 5958 5959 // 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) 5960 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5961 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5962 requested_level = LEVEL_4; 5963 } 5964 5965 gap_security_level_t current_level = gap_security_level(con_handle); 5966 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5967 requested_level, connection->requested_security_level, current_level); 5968 5969 // authentication active if authentication request was sent or planned level > 0 5970 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5971 if (authentication_active){ 5972 // authentication already active 5973 if (connection->requested_security_level < requested_level){ 5974 // increase requested level as new level is higher 5975 // TODO: handle re-authentication when done 5976 connection->requested_security_level = requested_level; 5977 } 5978 } else { 5979 // no request active, notify if security sufficient 5980 if (requested_level <= current_level){ 5981 hci_emit_security_level(con_handle, current_level); 5982 return; 5983 } 5984 5985 // store request 5986 connection->requested_security_level = requested_level; 5987 5988 // request remote features if not already active 5989 hci_remote_features_query(con_handle); 5990 5991 // start to authenticate connection 5992 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5993 hci_run(); 5994 } 5995 } 5996 5997 /** 5998 * @brief start dedicated bonding with device. disconnect after bonding 5999 * @param device 6000 * @param request MITM protection 6001 * @result GAP_DEDICATED_BONDING_COMPLETE 6002 */ 6003 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6004 6005 // create connection state machine 6006 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6007 6008 if (!connection){ 6009 return BTSTACK_MEMORY_ALLOC_FAILED; 6010 } 6011 6012 // delete linkn key 6013 gap_drop_link_key_for_bd_addr(device); 6014 6015 // configure LEVEL_2/3, dedicated bonding 6016 connection->state = SEND_CREATE_CONNECTION; 6017 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6018 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6019 connection->bonding_flags = BONDING_DEDICATED; 6020 6021 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6022 6023 // handle: connnection failure (connection complete != ok) 6024 // handle: authentication failure 6025 // handle: disconnect on done 6026 6027 hci_run(); 6028 6029 return 0; 6030 } 6031 6032 void gap_set_local_name(const char * local_name){ 6033 hci_stack->local_name = local_name; 6034 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6035 // also update EIR if not set by user 6036 if (hci_stack->eir_data == NULL){ 6037 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6038 } 6039 hci_run(); 6040 } 6041 #endif 6042 6043 6044 #ifdef ENABLE_BLE 6045 6046 #ifdef ENABLE_LE_CENTRAL 6047 void gap_start_scan(void){ 6048 hci_stack->le_scanning_enabled = true; 6049 hci_run(); 6050 } 6051 6052 void gap_stop_scan(void){ 6053 hci_stack->le_scanning_enabled = false; 6054 hci_run(); 6055 } 6056 6057 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6058 hci_stack->le_scan_type = scan_type; 6059 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6060 hci_stack->le_scan_interval = scan_interval; 6061 hci_stack->le_scan_window = scan_window; 6062 hci_stack->le_scanning_param_update = true; 6063 hci_run(); 6064 } 6065 6066 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6067 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6068 } 6069 6070 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6071 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6072 if (!conn){ 6073 // disallow if le connection is already outgoing 6074 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6075 log_error("le connection already active"); 6076 return ERROR_CODE_COMMAND_DISALLOWED; 6077 } 6078 6079 log_info("gap_connect: no connection exists yet, creating context"); 6080 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6081 if (!conn){ 6082 // notify client that alloc failed 6083 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6084 log_info("gap_connect: failed to alloc hci_connection_t"); 6085 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6086 } 6087 6088 // set le connecting state 6089 if (hci_is_le_connection_type(addr_type)){ 6090 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6091 } 6092 6093 conn->state = SEND_CREATE_CONNECTION; 6094 log_info("gap_connect: send create connection next"); 6095 hci_run(); 6096 return ERROR_CODE_SUCCESS; 6097 } 6098 6099 if (!hci_is_le_connection(conn) || 6100 (conn->state == SEND_CREATE_CONNECTION) || 6101 (conn->state == SENT_CREATE_CONNECTION)) { 6102 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6103 log_error("gap_connect: classic connection or connect is already being created"); 6104 return GATT_CLIENT_IN_WRONG_STATE; 6105 } 6106 6107 // check if connection was just disconnected 6108 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6109 log_info("gap_connect: send create connection (again)"); 6110 conn->state = SEND_CREATE_CONNECTION; 6111 hci_run(); 6112 return ERROR_CODE_SUCCESS; 6113 } 6114 6115 log_info("gap_connect: context exists with state %u", conn->state); 6116 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6117 hci_run(); 6118 return ERROR_CODE_SUCCESS; 6119 } 6120 6121 // @assumption: only a single outgoing LE Connection exists 6122 static hci_connection_t * gap_get_outgoing_connection(void){ 6123 btstack_linked_item_t *it; 6124 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6125 hci_connection_t * conn = (hci_connection_t *) it; 6126 if (!hci_is_le_connection(conn)) continue; 6127 switch (conn->state){ 6128 case SEND_CREATE_CONNECTION: 6129 case SENT_CREATE_CONNECTION: 6130 case SENT_CANCEL_CONNECTION: 6131 return conn; 6132 default: 6133 break; 6134 }; 6135 } 6136 return NULL; 6137 } 6138 6139 uint8_t gap_connect_cancel(void){ 6140 hci_connection_t * conn = gap_get_outgoing_connection(); 6141 if (!conn) return 0; 6142 switch (conn->state){ 6143 case SEND_CREATE_CONNECTION: 6144 // skip sending create connection and emit event instead 6145 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6146 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6147 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6148 btstack_memory_hci_connection_free( conn ); 6149 break; 6150 case SENT_CREATE_CONNECTION: 6151 // request to send cancel connection 6152 conn->state = SEND_CANCEL_CONNECTION; 6153 hci_run(); 6154 break; 6155 default: 6156 break; 6157 } 6158 return 0; 6159 } 6160 #endif 6161 6162 #ifdef ENABLE_LE_CENTRAL 6163 /** 6164 * @brief Set connection parameters for outgoing connections 6165 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6166 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6167 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6168 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6169 * @param conn_latency, default: 4 6170 * @param supervision_timeout (unit: 10ms), default: 720 ms 6171 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6172 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6173 */ 6174 6175 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6176 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6177 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6178 hci_stack->le_connection_scan_interval = conn_scan_interval; 6179 hci_stack->le_connection_scan_window = conn_scan_window; 6180 hci_stack->le_connection_interval_min = conn_interval_min; 6181 hci_stack->le_connection_interval_max = conn_interval_max; 6182 hci_stack->le_connection_latency = conn_latency; 6183 hci_stack->le_supervision_timeout = supervision_timeout; 6184 hci_stack->le_minimum_ce_length = min_ce_length; 6185 hci_stack->le_maximum_ce_length = max_ce_length; 6186 } 6187 #endif 6188 6189 /** 6190 * @brief Updates the connection parameters for a given LE connection 6191 * @param handle 6192 * @param conn_interval_min (unit: 1.25ms) 6193 * @param conn_interval_max (unit: 1.25ms) 6194 * @param conn_latency 6195 * @param supervision_timeout (unit: 10ms) 6196 * @return 0 if ok 6197 */ 6198 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6199 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6200 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6201 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6202 connection->le_conn_interval_min = conn_interval_min; 6203 connection->le_conn_interval_max = conn_interval_max; 6204 connection->le_conn_latency = conn_latency; 6205 connection->le_supervision_timeout = supervision_timeout; 6206 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6207 hci_run(); 6208 return 0; 6209 } 6210 6211 /** 6212 * @brief Request an update of the connection parameter for a given LE connection 6213 * @param handle 6214 * @param conn_interval_min (unit: 1.25ms) 6215 * @param conn_interval_max (unit: 1.25ms) 6216 * @param conn_latency 6217 * @param supervision_timeout (unit: 10ms) 6218 * @return 0 if ok 6219 */ 6220 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6221 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6222 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6223 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6224 connection->le_conn_interval_min = conn_interval_min; 6225 connection->le_conn_interval_max = conn_interval_max; 6226 connection->le_conn_latency = conn_latency; 6227 connection->le_supervision_timeout = supervision_timeout; 6228 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6229 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6230 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6231 return 0; 6232 } 6233 6234 #ifdef ENABLE_LE_PERIPHERAL 6235 6236 /** 6237 * @brief Set Advertisement Data 6238 * @param advertising_data_length 6239 * @param advertising_data (max 31 octets) 6240 * @note data is not copied, pointer has to stay valid 6241 */ 6242 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6243 hci_stack->le_advertisements_data_len = advertising_data_length; 6244 hci_stack->le_advertisements_data = advertising_data; 6245 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6246 hci_run(); 6247 } 6248 6249 /** 6250 * @brief Set Scan Response Data 6251 * @param advertising_data_length 6252 * @param advertising_data (max 31 octets) 6253 * @note data is not copied, pointer has to stay valid 6254 */ 6255 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6256 hci_stack->le_scan_response_data_len = scan_response_data_length; 6257 hci_stack->le_scan_response_data = scan_response_data; 6258 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6259 hci_run(); 6260 } 6261 6262 /** 6263 * @brief Set Advertisement Parameters 6264 * @param adv_int_min 6265 * @param adv_int_max 6266 * @param adv_type 6267 * @param direct_address_type 6268 * @param direct_address 6269 * @param channel_map 6270 * @param filter_policy 6271 * 6272 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6273 */ 6274 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6275 uint8_t direct_address_typ, bd_addr_t direct_address, 6276 uint8_t channel_map, uint8_t filter_policy) { 6277 6278 hci_stack->le_advertisements_interval_min = adv_int_min; 6279 hci_stack->le_advertisements_interval_max = adv_int_max; 6280 hci_stack->le_advertisements_type = adv_type; 6281 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6282 hci_stack->le_advertisements_channel_map = channel_map; 6283 hci_stack->le_advertisements_filter_policy = filter_policy; 6284 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6285 6); 6286 6287 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6288 hci_run(); 6289 } 6290 6291 /** 6292 * @brief Enable/Disable Advertisements 6293 * @param enabled 6294 */ 6295 void gap_advertisements_enable(int enabled){ 6296 hci_stack->le_advertisements_enabled = enabled != 0; 6297 hci_update_advertisements_enabled_for_current_roles(); 6298 hci_run(); 6299 } 6300 6301 #endif 6302 6303 void hci_le_set_own_address_type(uint8_t own_address_type){ 6304 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6305 if (own_address_type == hci_stack->le_own_addr_type) return; 6306 hci_stack->le_own_addr_type = own_address_type; 6307 6308 #ifdef ENABLE_LE_PERIPHERAL 6309 // update advertisement parameters, too 6310 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6311 hci_run(); 6312 #endif 6313 #ifdef ENABLE_LE_CENTRAL 6314 // note: we don't update scan parameters or modify ongoing connection attempts 6315 #endif 6316 } 6317 6318 void hci_le_random_address_set(const bd_addr_t random_address){ 6319 memcpy(hci_stack->le_random_address, random_address, 6); 6320 hci_stack->le_random_address_set = true; 6321 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6322 hci_run(); 6323 } 6324 6325 #endif 6326 6327 uint8_t gap_disconnect(hci_con_handle_t handle){ 6328 hci_connection_t * conn = hci_connection_for_handle(handle); 6329 if (!conn){ 6330 hci_emit_disconnection_complete(handle, 0); 6331 return 0; 6332 } 6333 // ignore if already disconnected 6334 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6335 return 0; 6336 } 6337 conn->state = SEND_DISCONNECT; 6338 hci_run(); 6339 return 0; 6340 } 6341 6342 int gap_read_rssi(hci_con_handle_t con_handle){ 6343 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6344 if (hci_connection == NULL) return 0; 6345 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6346 hci_run(); 6347 return 1; 6348 } 6349 6350 /** 6351 * @brief Get connection type 6352 * @param con_handle 6353 * @result connection_type 6354 */ 6355 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6356 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6357 if (!conn) return GAP_CONNECTION_INVALID; 6358 switch (conn->address_type){ 6359 case BD_ADDR_TYPE_LE_PUBLIC: 6360 case BD_ADDR_TYPE_LE_RANDOM: 6361 return GAP_CONNECTION_LE; 6362 case BD_ADDR_TYPE_SCO: 6363 return GAP_CONNECTION_SCO; 6364 case BD_ADDR_TYPE_ACL: 6365 return GAP_CONNECTION_ACL; 6366 default: 6367 return GAP_CONNECTION_INVALID; 6368 } 6369 } 6370 6371 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6372 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6373 if (!conn) return HCI_ROLE_INVALID; 6374 return (hci_role_t) conn->role; 6375 } 6376 6377 6378 #ifdef ENABLE_CLASSIC 6379 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6380 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6381 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6382 conn->request_role = role; 6383 hci_run(); 6384 return ERROR_CODE_SUCCESS; 6385 } 6386 #endif 6387 6388 #ifdef ENABLE_BLE 6389 6390 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){ 6391 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6392 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6393 6394 conn->le_phy_update_all_phys = all_phys; 6395 conn->le_phy_update_tx_phys = tx_phys; 6396 conn->le_phy_update_rx_phys = rx_phys; 6397 conn->le_phy_update_phy_options = phy_options; 6398 6399 hci_run(); 6400 6401 return 0; 6402 } 6403 6404 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6405 // check if already in list 6406 btstack_linked_list_iterator_t it; 6407 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6408 while (btstack_linked_list_iterator_has_next(&it)) { 6409 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6410 if (entry->address_type != address_type) { 6411 continue; 6412 } 6413 if (memcmp(entry->address, address, 6) != 0) { 6414 continue; 6415 } 6416 // disallow if already scheduled to add 6417 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6418 return ERROR_CODE_COMMAND_DISALLOWED; 6419 } 6420 // still on controller, but scheduled to remove -> re-add 6421 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6422 return ERROR_CODE_SUCCESS; 6423 } 6424 // alloc and add to list 6425 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6426 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6427 entry->address_type = address_type; 6428 (void)memcpy(entry->address, address, 6); 6429 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6430 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6431 return ERROR_CODE_SUCCESS; 6432 } 6433 6434 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6435 btstack_linked_list_iterator_t it; 6436 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6437 while (btstack_linked_list_iterator_has_next(&it)){ 6438 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6439 if (entry->address_type != address_type) { 6440 continue; 6441 } 6442 if (memcmp(entry->address, address, 6) != 0) { 6443 continue; 6444 } 6445 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6446 // remove from controller if already present 6447 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6448 } else { 6449 // directly remove entry from whitelist 6450 btstack_linked_list_iterator_remove(&it); 6451 btstack_memory_whitelist_entry_free(entry); 6452 } 6453 return ERROR_CODE_SUCCESS; 6454 } 6455 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6456 } 6457 6458 static void hci_whitelist_clear(void){ 6459 btstack_linked_list_iterator_t it; 6460 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6461 while (btstack_linked_list_iterator_has_next(&it)){ 6462 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6463 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6464 // remove from controller if already present 6465 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6466 continue; 6467 } 6468 // directly remove entry from whitelist 6469 btstack_linked_list_iterator_remove(&it); 6470 btstack_memory_whitelist_entry_free(entry); 6471 } 6472 } 6473 6474 // free all entries unconditionally 6475 static void hci_whitelist_free(void){ 6476 btstack_linked_list_iterator_t lit; 6477 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6478 while (btstack_linked_list_iterator_has_next(&lit)){ 6479 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6480 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6481 btstack_memory_whitelist_entry_free(entry); 6482 } 6483 } 6484 6485 /** 6486 * @brief Clear Whitelist 6487 * @return 0 if ok 6488 */ 6489 uint8_t gap_whitelist_clear(void){ 6490 hci_whitelist_clear(); 6491 hci_run(); 6492 return ERROR_CODE_SUCCESS; 6493 } 6494 6495 /** 6496 * @brief Add Device to Whitelist 6497 * @param address_typ 6498 * @param address 6499 * @return 0 if ok 6500 */ 6501 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6502 uint8_t status = hci_whitelist_add(address_type, address); 6503 if (status){ 6504 return status; 6505 } 6506 hci_run(); 6507 return ERROR_CODE_SUCCESS; 6508 } 6509 6510 /** 6511 * @brief Remove Device from Whitelist 6512 * @param address_typ 6513 * @param address 6514 * @return 0 if ok 6515 */ 6516 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6517 uint8_t status = hci_whitelist_remove(address_type, address); 6518 if (status){ 6519 return status; 6520 } 6521 hci_run(); 6522 return ERROR_CODE_SUCCESS; 6523 } 6524 6525 #ifdef ENABLE_LE_CENTRAL 6526 /** 6527 * @brief Connect with Whitelist 6528 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6529 * @return - if ok 6530 */ 6531 uint8_t gap_connect_with_whitelist(void){ 6532 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6533 return ERROR_CODE_COMMAND_DISALLOWED; 6534 } 6535 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6536 hci_run(); 6537 return ERROR_CODE_SUCCESS; 6538 } 6539 6540 /** 6541 * @brief Auto Connection Establishment - Start Connecting to device 6542 * @param address_typ 6543 * @param address 6544 * @return 0 if ok 6545 */ 6546 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6547 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6548 return ERROR_CODE_COMMAND_DISALLOWED; 6549 } 6550 6551 uint8_t status = hci_whitelist_add(address_type, address); 6552 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6553 return status; 6554 } 6555 6556 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6557 6558 hci_run(); 6559 return ERROR_CODE_SUCCESS; 6560 } 6561 6562 /** 6563 * @brief Auto Connection Establishment - Stop Connecting to device 6564 * @param address_typ 6565 * @param address 6566 * @return 0 if ok 6567 */ 6568 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6569 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6570 return ERROR_CODE_COMMAND_DISALLOWED; 6571 } 6572 6573 hci_whitelist_remove(address_type, address); 6574 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6575 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6576 } 6577 hci_run(); 6578 return 0; 6579 } 6580 6581 /** 6582 * @brief Auto Connection Establishment - Stop everything 6583 * @note Convenience function to stop all active auto connection attempts 6584 */ 6585 uint8_t gap_auto_connection_stop_all(void){ 6586 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6587 return ERROR_CODE_COMMAND_DISALLOWED; 6588 } 6589 hci_whitelist_clear(); 6590 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6591 hci_run(); 6592 return ERROR_CODE_SUCCESS; 6593 } 6594 6595 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6596 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6597 if (!conn) return 0; 6598 return conn->le_connection_interval; 6599 } 6600 #endif 6601 #endif 6602 6603 #ifdef ENABLE_CLASSIC 6604 /** 6605 * @brief Set Extended Inquiry Response data 6606 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6607 * @note has to be done before stack starts up 6608 */ 6609 void gap_set_extended_inquiry_response(const uint8_t * data){ 6610 hci_stack->eir_data = data; 6611 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6612 hci_run(); 6613 } 6614 6615 /** 6616 * @brief Start GAP Classic Inquiry 6617 * @param duration in 1.28s units 6618 * @return 0 if ok 6619 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6620 */ 6621 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6622 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6623 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6624 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6625 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6626 } 6627 hci_stack->inquiry_state = duration_in_1280ms_units; 6628 hci_run(); 6629 return 0; 6630 } 6631 6632 /** 6633 * @brief Stop GAP Classic Inquiry 6634 * @return 0 if ok 6635 */ 6636 int gap_inquiry_stop(void){ 6637 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6638 // emit inquiry complete event, before it even started 6639 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6640 hci_emit_event(event, sizeof(event), 1); 6641 return 0; 6642 } 6643 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6644 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6645 hci_run(); 6646 return 0; 6647 } 6648 6649 void gap_inquiry_set_lap(uint32_t lap){ 6650 hci_stack->inquiry_lap = lap; 6651 } 6652 6653 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6654 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6655 hci_stack->inquiry_scan_window = inquiry_scan_window; 6656 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6657 hci_run(); 6658 } 6659 6660 6661 /** 6662 * @brief Remote Name Request 6663 * @param addr 6664 * @param page_scan_repetition_mode 6665 * @param clock_offset only used when bit 15 is set 6666 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6667 */ 6668 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6669 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6670 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6671 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6672 hci_stack->remote_name_clock_offset = clock_offset; 6673 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6674 hci_run(); 6675 return 0; 6676 } 6677 6678 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6679 hci_stack->gap_pairing_state = state; 6680 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6681 hci_run(); 6682 return 0; 6683 } 6684 6685 /** 6686 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6687 * @param addr 6688 * @param pin_data 6689 * @param pin_len 6690 * @return 0 if ok 6691 */ 6692 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6693 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6694 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6695 hci_stack->gap_pairing_pin_len = pin_len; 6696 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6697 } 6698 6699 /** 6700 * @brief Legacy Pairing Pin Code Response 6701 * @param addr 6702 * @param pin 6703 * @return 0 if ok 6704 */ 6705 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6706 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6707 } 6708 6709 /** 6710 * @brief Abort Legacy Pairing 6711 * @param addr 6712 * @param pin 6713 * @return 0 if ok 6714 */ 6715 int gap_pin_code_negative(bd_addr_t addr){ 6716 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6717 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6718 } 6719 6720 /** 6721 * @brief SSP Passkey Response 6722 * @param addr 6723 * @param passkey 6724 * @return 0 if ok 6725 */ 6726 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6727 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6728 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6729 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6730 } 6731 6732 /** 6733 * @brief Abort SSP Passkey Entry/Pairing 6734 * @param addr 6735 * @param pin 6736 * @return 0 if ok 6737 */ 6738 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6739 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6740 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6741 } 6742 6743 /** 6744 * @brief Accept SSP Numeric Comparison 6745 * @param addr 6746 * @param passkey 6747 * @return 0 if ok 6748 */ 6749 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6750 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6751 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6752 } 6753 6754 /** 6755 * @brief Abort SSP Numeric Comparison/Pairing 6756 * @param addr 6757 * @param pin 6758 * @return 0 if ok 6759 */ 6760 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6761 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6762 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6763 } 6764 6765 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6766 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6767 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6768 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6769 connectionSetAuthenticationFlags(conn, flag); 6770 hci_run(); 6771 return ERROR_CODE_SUCCESS; 6772 } 6773 #endif 6774 6775 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6776 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6777 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6778 } 6779 6780 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6781 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6782 } 6783 #endif 6784 6785 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6786 /** 6787 * @brief Report Remote OOB Data 6788 * @param bd_addr 6789 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6790 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6791 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6792 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6793 */ 6794 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){ 6795 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6796 if (connection == NULL) { 6797 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6798 } 6799 connection->classic_oob_c_192 = c_192; 6800 connection->classic_oob_r_192 = r_192; 6801 6802 // ignore P-256 if not supported by us 6803 if (hci_stack->secure_connections_active){ 6804 connection->classic_oob_c_256 = c_256; 6805 connection->classic_oob_r_256 = r_256; 6806 } 6807 6808 return ERROR_CODE_SUCCESS; 6809 } 6810 /** 6811 * @brief Generate new OOB data 6812 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6813 */ 6814 void gap_ssp_generate_oob_data(void){ 6815 hci_stack->classic_read_local_oob_data = true; 6816 hci_run(); 6817 } 6818 6819 #endif 6820 6821 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6822 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6823 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6824 if (connection == NULL) { 6825 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6826 } 6827 6828 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6829 connection->link_key_type = type; 6830 6831 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6832 } 6833 6834 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6835 /** 6836 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6837 * @param inquiry_mode see bluetooth_defines.h 6838 */ 6839 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6840 hci_stack->inquiry_mode = inquiry_mode; 6841 } 6842 6843 /** 6844 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6845 */ 6846 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6847 hci_stack->sco_voice_setting = voice_setting; 6848 } 6849 6850 /** 6851 * @brief Get SCO Voice Setting 6852 * @return current voice setting 6853 */ 6854 uint16_t hci_get_sco_voice_setting(void){ 6855 return hci_stack->sco_voice_setting; 6856 } 6857 6858 static int hci_have_usb_transport(void){ 6859 if (!hci_stack->hci_transport) return 0; 6860 const char * transport_name = hci_stack->hci_transport->name; 6861 if (!transport_name) return 0; 6862 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6863 } 6864 6865 /** @brief Get SCO packet length for current SCO Voice setting 6866 * @note Using SCO packets of the exact length is required for USB transfer 6867 * @return Length of SCO packets in bytes (not audio frames) 6868 */ 6869 uint16_t hci_get_sco_packet_length(void){ 6870 uint16_t sco_packet_length = 0; 6871 6872 #ifdef ENABLE_SCO_OVER_HCI 6873 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6874 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6875 6876 if (hci_have_usb_transport()){ 6877 // see Core Spec for H2 USB Transfer. 6878 // 3 byte SCO header + 24 bytes per connection 6879 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6880 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6881 } else { 6882 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6883 sco_packet_length = 3 + 60 * multiplier; 6884 // assert that it still fits inside an SCO buffer 6885 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6886 sco_packet_length = 3 + 60; 6887 } 6888 } 6889 #endif 6890 6891 #ifdef HAVE_SCO_TRANSPORT 6892 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6893 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6894 sco_packet_length = 3 + 60 * multiplier; 6895 #endif 6896 return sco_packet_length; 6897 } 6898 6899 /** 6900 * @brief Sets the master/slave policy 6901 * @param policy (0: attempt to become master, 1: let connecting device decide) 6902 */ 6903 void hci_set_master_slave_policy(uint8_t policy){ 6904 hci_stack->master_slave_policy = policy; 6905 } 6906 6907 #endif 6908 6909 HCI_STATE hci_get_state(void){ 6910 return hci_stack->state; 6911 } 6912 6913 #ifdef ENABLE_CLASSIC 6914 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6915 hci_stack->gap_classic_accept_callback = accept_callback; 6916 } 6917 #endif 6918 6919 /** 6920 * @brief Set callback for Bluetooth Hardware Error 6921 */ 6922 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6923 hci_stack->hardware_error_callback = fn; 6924 } 6925 6926 void hci_disconnect_all(void){ 6927 btstack_linked_list_iterator_t it; 6928 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6929 while (btstack_linked_list_iterator_has_next(&it)){ 6930 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6931 if (con->state == SENT_DISCONNECT) continue; 6932 con->state = SEND_DISCONNECT; 6933 } 6934 hci_run(); 6935 } 6936 6937 uint16_t hci_get_manufacturer(void){ 6938 return hci_stack->manufacturer; 6939 } 6940 6941 #ifdef ENABLE_BLE 6942 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6943 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6944 if (!hci_con) return NULL; 6945 return &hci_con->sm_connection; 6946 } 6947 6948 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6949 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6950 #endif 6951 6952 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 6953 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6954 if (hci_connection == NULL) return 0; 6955 if (hci_is_le_connection(hci_connection)){ 6956 #ifdef ENABLE_BLE 6957 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6958 if (sm_conn->sm_connection_encrypted) { 6959 return sm_conn->sm_actual_encryption_key_size; 6960 } 6961 #endif 6962 } else { 6963 #ifdef ENABLE_CLASSIC 6964 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6965 return hci_connection->encryption_key_size; 6966 } 6967 #endif 6968 } 6969 return 0; 6970 } 6971 6972 bool gap_authenticated(hci_con_handle_t con_handle){ 6973 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6974 if (hci_connection == NULL) return false; 6975 6976 switch (hci_connection->address_type){ 6977 #ifdef ENABLE_BLE 6978 case BD_ADDR_TYPE_LE_PUBLIC: 6979 case BD_ADDR_TYPE_LE_RANDOM: 6980 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6981 return hci_connection->sm_connection.sm_connection_authenticated != 0; 6982 #endif 6983 #ifdef ENABLE_CLASSIC 6984 case BD_ADDR_TYPE_SCO: 6985 case BD_ADDR_TYPE_ACL: 6986 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6987 #endif 6988 default: 6989 return false; 6990 } 6991 } 6992 6993 bool gap_secure_connection(hci_con_handle_t con_handle){ 6994 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6995 if (hci_connection == NULL) return 0; 6996 6997 switch (hci_connection->address_type){ 6998 #ifdef ENABLE_BLE 6999 case BD_ADDR_TYPE_LE_PUBLIC: 7000 case BD_ADDR_TYPE_LE_RANDOM: 7001 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7002 return hci_connection->sm_connection.sm_connection_sc != 0; 7003 #endif 7004 #ifdef ENABLE_CLASSIC 7005 case BD_ADDR_TYPE_SCO: 7006 case BD_ADDR_TYPE_ACL: 7007 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7008 #endif 7009 default: 7010 return false; 7011 } 7012 } 7013 7014 bool gap_bonded(hci_con_handle_t con_handle){ 7015 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7016 if (hci_connection == NULL) return 0; 7017 7018 #ifdef ENABLE_CLASSIC 7019 link_key_t link_key; 7020 link_key_type_t link_key_type; 7021 #endif 7022 switch (hci_connection->address_type){ 7023 #ifdef ENABLE_BLE 7024 case BD_ADDR_TYPE_LE_PUBLIC: 7025 case BD_ADDR_TYPE_LE_RANDOM: 7026 return hci_connection->sm_connection.sm_le_db_index >= 0; 7027 #endif 7028 #ifdef ENABLE_CLASSIC 7029 case BD_ADDR_TYPE_SCO: 7030 case BD_ADDR_TYPE_ACL: 7031 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7032 #endif 7033 default: 7034 return false; 7035 } 7036 } 7037 7038 #ifdef ENABLE_BLE 7039 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7040 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7041 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7042 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7043 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7044 return sm_conn->sm_connection_authorization_state; 7045 } 7046 #endif 7047 7048 #ifdef ENABLE_CLASSIC 7049 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){ 7050 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7051 if (!conn) return GAP_CONNECTION_INVALID; 7052 conn->sniff_min_interval = sniff_min_interval; 7053 conn->sniff_max_interval = sniff_max_interval; 7054 conn->sniff_attempt = sniff_attempt; 7055 conn->sniff_timeout = sniff_timeout; 7056 hci_run(); 7057 return 0; 7058 } 7059 7060 /** 7061 * @brief Exit Sniff mode 7062 * @param con_handle 7063 @ @return 0 if ok 7064 */ 7065 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7066 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7067 if (!conn) return GAP_CONNECTION_INVALID; 7068 conn->sniff_min_interval = 0xffff; 7069 hci_run(); 7070 return 0; 7071 } 7072 7073 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){ 7074 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7075 if (!conn) return GAP_CONNECTION_INVALID; 7076 conn->sniff_subrating_max_latency = max_latency; 7077 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7078 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7079 hci_run(); 7080 return ERROR_CODE_SUCCESS; 7081 } 7082 7083 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){ 7084 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7085 if (!conn) return GAP_CONNECTION_INVALID; 7086 conn->qos_service_type = service_type; 7087 conn->qos_token_rate = token_rate; 7088 conn->qos_peak_bandwidth = peak_bandwidth; 7089 conn->qos_latency = latency; 7090 conn->qos_delay_variation = delay_variation; 7091 hci_run(); 7092 return ERROR_CODE_SUCCESS; 7093 } 7094 7095 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7096 hci_stack->new_page_scan_interval = page_scan_interval; 7097 hci_stack->new_page_scan_window = page_scan_window; 7098 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7099 hci_run(); 7100 } 7101 7102 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7103 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7104 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7105 hci_run(); 7106 } 7107 7108 void gap_set_page_timeout(uint16_t page_timeout){ 7109 hci_stack->page_timeout = page_timeout; 7110 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7111 hci_run(); 7112 } 7113 7114 #endif 7115 7116 void hci_halting_defer(void){ 7117 if (hci_stack->state != HCI_STATE_HALTING) return; 7118 switch (hci_stack->substate){ 7119 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 7120 case HCI_HALTING_CLOSE: 7121 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 7122 break; 7123 default: 7124 break; 7125 } 7126 } 7127 7128 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7129 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7130 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7131 if (le_device_db_index >= le_device_db_max_count()) return; 7132 uint8_t offset = le_device_db_index >> 3; 7133 uint8_t mask = 1 << (le_device_db_index & 7); 7134 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7135 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7136 // note: go back to remove entries, otherwise, a remove + add will skip the add 7137 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7138 } 7139 } 7140 7141 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7142 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7143 if (le_device_db_index >= le_device_db_max_count()) return; 7144 uint8_t offset = le_device_db_index >> 3; 7145 uint8_t mask = 1 << (le_device_db_index & 7); 7146 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7147 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7148 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7149 } 7150 } 7151 7152 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7153 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7154 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7155 } 7156 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7157 // restart le resolving list update 7158 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7159 } 7160 return ERROR_CODE_SUCCESS; 7161 } 7162 #endif 7163 7164 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7165 void hci_setup_test_connections_fuzz(void){ 7166 hci_connection_t * conn; 7167 7168 // default address: 66:55:44:33:00:01 7169 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7170 7171 // setup Controller info 7172 hci_stack->num_cmd_packets = 255; 7173 hci_stack->acl_packets_total_num = 255; 7174 7175 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7176 addr[5] = 0x01; 7177 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7178 conn->con_handle = addr[5]; 7179 conn->role = HCI_ROLE_SLAVE; 7180 conn->state = RECEIVED_CONNECTION_REQUEST; 7181 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7182 7183 // setup incoming Classic SCO connection with con handle 0x0002 7184 addr[5] = 0x02; 7185 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7186 conn->con_handle = addr[5]; 7187 conn->role = HCI_ROLE_SLAVE; 7188 conn->state = RECEIVED_CONNECTION_REQUEST; 7189 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7190 7191 // setup ready Classic ACL connection with con handle 0x0003 7192 addr[5] = 0x03; 7193 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7194 conn->con_handle = addr[5]; 7195 conn->role = HCI_ROLE_SLAVE; 7196 conn->state = OPEN; 7197 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7198 7199 // setup ready Classic SCO connection with con handle 0x0004 7200 addr[5] = 0x04; 7201 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7202 conn->con_handle = addr[5]; 7203 conn->role = HCI_ROLE_SLAVE; 7204 conn->state = OPEN; 7205 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7206 7207 // setup ready LE ACL connection with con handle 0x005 and public address 7208 addr[5] = 0x05; 7209 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7210 conn->con_handle = addr[5]; 7211 conn->role = HCI_ROLE_SLAVE; 7212 conn->state = OPEN; 7213 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7214 conn->sm_connection.sm_connection_encrypted = 1; 7215 } 7216 7217 void hci_free_connections_fuzz(void){ 7218 btstack_linked_list_iterator_t it; 7219 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7220 while (btstack_linked_list_iterator_has_next(&it)){ 7221 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7222 btstack_linked_list_iterator_remove(&it); 7223 btstack_memory_hci_connection_free(con); 7224 } 7225 } 7226 void hci_simulate_working_fuzz(void){ 7227 hci_stack->le_scanning_param_update = false; 7228 hci_init_done(); 7229 hci_stack->num_cmd_packets = 255; 7230 } 7231 #endif 7232