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 releveant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into 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_BUFFER_SIZE , 14, 7) \ 144 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 145 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 146 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 147 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 148 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 149 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 150 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 151 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 152 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 153 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 154 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 155 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 156 157 // enumerate supported commands 158 #define X(name, offset, bit) name, 159 enum { 160 SUPPORTED_HCI_COMMANDS 161 SUPPORTED_HCI_COMMANDS_COUNT 162 }; 163 #undef X 164 165 // assert supported hci commands bitmap fits into provided storage 166 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 167 #error "Storage for supported HCI commands too small" 168 #endif 169 170 // prototypes 171 #ifdef ENABLE_CLASSIC 172 static void hci_update_scan_enable(void); 173 static void hci_emit_discoverable_enabled(uint8_t enabled); 174 static int hci_local_ssp_activated(void); 175 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 176 static bool hci_ssp_supported(hci_connection_t * connection); 177 static void hci_notify_if_sco_can_send_now(void); 178 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 179 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 180 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 181 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 182 static void hci_connection_timestamp(hci_connection_t *connection); 183 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 184 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 185 #endif 186 187 static int hci_power_control_on(void); 188 static void hci_power_control_off(void); 189 static void hci_state_reset(void); 190 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 191 static void hci_emit_transport_packet_sent(void); 192 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 193 static void hci_emit_nr_connections_changed(void); 194 static void hci_emit_hci_open_failed(void); 195 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 196 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 197 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 198 static void hci_run(void); 199 static int hci_is_le_connection(hci_connection_t * connection); 200 201 #ifdef ENABLE_CLASSIC 202 static int hci_have_usb_transport(void); 203 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 204 #endif 205 206 #ifdef ENABLE_BLE 207 #ifdef ENABLE_LE_CENTRAL 208 // called from test/ble_client/advertising_data_parser.c 209 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 210 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 211 static void hci_whitelist_free(void); 212 static hci_connection_t * gap_get_outgoing_connection(void); 213 static bool hci_run_general_gap_le(void); 214 #endif 215 #endif 216 217 // the STACK is here 218 #ifndef HAVE_MALLOC 219 static hci_stack_t hci_stack_static; 220 #endif 221 static hci_stack_t * hci_stack = NULL; 222 223 #ifdef ENABLE_CLASSIC 224 // default name 225 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 226 227 // test helper 228 static uint8_t disable_l2cap_timeouts = 0; 229 #endif 230 231 // reset connection state on create and on reconnect 232 // don't overwrite addr, con handle, role 233 static void hci_connection_init(hci_connection_t * conn){ 234 conn->authentication_flags = AUTH_FLAG_NONE; 235 conn->bonding_flags = 0; 236 conn->requested_security_level = LEVEL_0; 237 #ifdef ENABLE_CLASSIC 238 conn->request_role = HCI_ROLE_INVALID; 239 conn->sniff_subrating_max_latency = 0xffff; 240 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 241 conn->link_key_type = INVALID_LINK_KEY; 242 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 243 btstack_run_loop_set_timer_context(&conn->timeout, conn); 244 hci_connection_timestamp(conn); 245 #endif 246 conn->acl_recombination_length = 0; 247 conn->acl_recombination_pos = 0; 248 conn->num_packets_sent = 0; 249 250 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 251 #ifdef ENABLE_BLE 252 conn->le_phy_update_all_phys = 0xff; 253 #endif 254 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 255 conn->le_max_tx_octets = 27; 256 #endif 257 #ifdef ENABLE_CLASSIC_PAIRING_OOB 258 conn->classic_oob_c_192 = NULL; 259 conn->classic_oob_r_192 = NULL; 260 conn->classic_oob_c_256 = NULL; 261 conn->classic_oob_r_256 = NULL; 262 #endif 263 } 264 265 /** 266 * create connection for given address 267 * 268 * @return connection OR NULL, if no memory left 269 */ 270 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 271 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 272 273 hci_connection_t * conn = btstack_memory_hci_connection_get(); 274 if (!conn) return NULL; 275 hci_connection_init(conn); 276 277 bd_addr_copy(conn->address, addr); 278 conn->address_type = addr_type; 279 conn->con_handle = HCI_CON_HANDLE_INVALID; 280 conn->role = HCI_ROLE_INVALID; 281 282 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 283 284 return conn; 285 } 286 287 288 /** 289 * get le connection parameter range 290 * 291 * @return le connection parameter range struct 292 */ 293 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 294 *range = hci_stack->le_connection_parameter_range; 295 } 296 297 /** 298 * set le connection parameter range 299 * 300 */ 301 302 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 303 hci_stack->le_connection_parameter_range = *range; 304 } 305 306 /** 307 * @brief Test if connection parameters are inside in existing rage 308 * @param conn_interval_min (unit: 1.25ms) 309 * @param conn_interval_max (unit: 1.25ms) 310 * @param conn_latency 311 * @param supervision_timeout (unit: 10ms) 312 * @return 1 if included 313 */ 314 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){ 315 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 316 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 317 318 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 319 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 320 321 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 322 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 323 324 return 1; 325 } 326 327 /** 328 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 329 * @note: default: 1 330 * @param max_peripheral_connections 331 */ 332 #ifdef ENABLE_LE_PERIPHERAL 333 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 334 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 335 } 336 #endif 337 338 /** 339 * get hci connections iterator 340 * 341 * @return hci connections iterator 342 */ 343 344 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 345 btstack_linked_list_iterator_init(it, &hci_stack->connections); 346 } 347 348 /** 349 * get connection for a given handle 350 * 351 * @return connection OR NULL, if not found 352 */ 353 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 354 btstack_linked_list_iterator_t it; 355 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 356 while (btstack_linked_list_iterator_has_next(&it)){ 357 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 358 if ( item->con_handle == con_handle ) { 359 return item; 360 } 361 } 362 return NULL; 363 } 364 365 /** 366 * get connection for given address 367 * 368 * @return connection OR NULL, if not found 369 */ 370 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 371 btstack_linked_list_iterator_t it; 372 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 373 while (btstack_linked_list_iterator_has_next(&it)){ 374 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 375 if (connection->address_type != addr_type) continue; 376 if (memcmp(addr, connection->address, 6) != 0) continue; 377 return connection; 378 } 379 return NULL; 380 } 381 382 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 383 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 384 } 385 386 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 387 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 388 } 389 390 #ifdef ENABLE_CLASSIC 391 392 #ifdef ENABLE_SCO_OVER_HCI 393 static int hci_number_sco_connections(void){ 394 int connections = 0; 395 btstack_linked_list_iterator_t it; 396 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 397 while (btstack_linked_list_iterator_has_next(&it)){ 398 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 399 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 400 connections++; 401 } 402 return connections; 403 } 404 #endif 405 406 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 407 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 408 #ifdef HAVE_EMBEDDED_TICK 409 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 410 // connections might be timed out 411 hci_emit_l2cap_check_timeout(connection); 412 } 413 #else 414 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 415 // connections might be timed out 416 hci_emit_l2cap_check_timeout(connection); 417 } 418 #endif 419 } 420 421 static void hci_connection_timestamp(hci_connection_t *connection){ 422 #ifdef HAVE_EMBEDDED_TICK 423 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 424 #else 425 connection->timestamp = btstack_run_loop_get_time_ms(); 426 #endif 427 } 428 429 /** 430 * add authentication flags and reset timer 431 * @note: assumes classic connection 432 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 433 */ 434 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 435 bd_addr_t addr; 436 reverse_bd_addr(bd_addr, addr); 437 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 438 if (conn) { 439 connectionSetAuthenticationFlags(conn, flags); 440 hci_connection_timestamp(conn); 441 } 442 } 443 444 static bool hci_pairing_active(hci_connection_t * hci_connection){ 445 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 446 } 447 448 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 449 if (hci_pairing_active(hci_connection)) return; 450 if (ssp){ 451 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 452 } else { 453 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 454 } 455 // if we are initiator, we have sent an HCI Authenticate Request 456 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 457 458 // if we are responder, use minimal service security level as required level 459 if (!initiator){ 460 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); 461 } 462 463 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 464 465 uint8_t event[12]; 466 event[0] = GAP_EVENT_PAIRING_STARTED; 467 event[1] = 10; 468 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 469 reverse_bd_addr(hci_connection->address, &event[4]); 470 event[10] = (uint8_t) ssp; 471 event[11] = (uint8_t) initiator; 472 hci_emit_event(event, sizeof(event), 1); 473 } 474 475 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 476 hci_connection->requested_security_level = LEVEL_0; 477 if (!hci_pairing_active(hci_connection)) return; 478 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 479 #ifdef ENABLE_CLASSIC_PAIRING_OOB 480 hci_connection->classic_oob_c_192 = NULL; 481 hci_connection->classic_oob_r_192 = NULL; 482 hci_connection->classic_oob_c_256 = NULL; 483 hci_connection->classic_oob_r_256 = NULL; 484 #endif 485 log_info("pairing complete, status %02x", status); 486 487 uint8_t event[11]; 488 event[0] = GAP_EVENT_PAIRING_COMPLETE; 489 event[1] = 9; 490 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 491 reverse_bd_addr(hci_connection->address, &event[4]); 492 event[10] = status; 493 hci_emit_event(event, sizeof(event), 1); 494 } 495 496 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 497 hci_connection_t * conn = hci_connection_for_handle(handle); 498 if (!conn) return false; 499 return hci_pairing_active(conn); 500 } 501 502 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 503 if (!hci_stack->link_key_db) return; 504 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 505 hci_stack->link_key_db->delete_link_key(addr); 506 } 507 508 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 509 if (!hci_stack->link_key_db) return; 510 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 511 hci_stack->link_key_db->put_link_key(addr, link_key, type); 512 } 513 514 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 515 if (!hci_stack->link_key_db) return false; 516 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 517 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 518 return result; 519 } 520 521 void gap_delete_all_link_keys(void){ 522 bd_addr_t addr; 523 link_key_t link_key; 524 link_key_type_t type; 525 btstack_link_key_iterator_t it; 526 int ok = gap_link_key_iterator_init(&it); 527 if (!ok) { 528 log_error("could not initialize iterator"); 529 return; 530 } 531 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 532 gap_drop_link_key_for_bd_addr(addr); 533 } 534 gap_link_key_iterator_done(&it); 535 } 536 537 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 538 if (!hci_stack->link_key_db) return 0; 539 if (!hci_stack->link_key_db->iterator_init) return 0; 540 return hci_stack->link_key_db->iterator_init(it); 541 } 542 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){ 543 if (!hci_stack->link_key_db) return 0; 544 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 545 } 546 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 547 if (!hci_stack->link_key_db) return; 548 hci_stack->link_key_db->iterator_done(it); 549 } 550 #endif 551 552 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 553 switch (address_type){ 554 case BD_ADDR_TYPE_LE_PUBLIC: 555 case BD_ADDR_TYPE_LE_RANDOM: 556 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 557 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 558 return true; 559 default: 560 return false; 561 } 562 } 563 564 static int hci_is_le_connection(hci_connection_t * connection){ 565 return hci_is_le_connection_type(connection->address_type); 566 } 567 568 /** 569 * count connections 570 */ 571 static int nr_hci_connections(void){ 572 int count = 0; 573 btstack_linked_item_t *it; 574 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 575 count++; 576 } 577 return count; 578 } 579 580 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 581 582 unsigned int num_packets_sent_classic = 0; 583 unsigned int num_packets_sent_le = 0; 584 585 btstack_linked_item_t *it; 586 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 587 hci_connection_t * connection = (hci_connection_t *) it; 588 if (hci_is_le_connection(connection)){ 589 num_packets_sent_le += connection->num_packets_sent; 590 } 591 if (connection->address_type == BD_ADDR_TYPE_ACL){ 592 num_packets_sent_classic += connection->num_packets_sent; 593 } 594 } 595 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 596 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 597 int free_slots_le = 0; 598 599 if (free_slots_classic < 0){ 600 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); 601 return 0; 602 } 603 604 if (hci_stack->le_acl_packets_total_num){ 605 // if we have LE slots, they are used 606 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 607 if (free_slots_le < 0){ 608 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); 609 return 0; 610 } 611 } else { 612 // otherwise, classic slots are used for LE, too 613 free_slots_classic -= num_packets_sent_le; 614 if (free_slots_classic < 0){ 615 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); 616 return 0; 617 } 618 } 619 620 switch (address_type){ 621 case BD_ADDR_TYPE_UNKNOWN: 622 log_error("hci_number_free_acl_slots: unknown address type"); 623 return 0; 624 625 case BD_ADDR_TYPE_ACL: 626 return (uint16_t) free_slots_classic; 627 628 default: 629 if (hci_stack->le_acl_packets_total_num > 0){ 630 return (uint16_t) free_slots_le; 631 } 632 return (uint16_t) free_slots_classic; 633 } 634 } 635 636 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 637 // get connection type 638 hci_connection_t * connection = hci_connection_for_handle(con_handle); 639 if (!connection){ 640 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 641 return 0; 642 } 643 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 644 } 645 646 #ifdef ENABLE_CLASSIC 647 static int hci_number_free_sco_slots(void){ 648 unsigned int num_sco_packets_sent = 0; 649 btstack_linked_item_t *it; 650 if (hci_stack->synchronous_flow_control_enabled){ 651 // explicit flow control 652 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 653 hci_connection_t * connection = (hci_connection_t *) it; 654 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 655 num_sco_packets_sent += connection->num_packets_sent; 656 } 657 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 658 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 659 return 0; 660 } 661 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 662 } else { 663 // implicit flow control -- TODO 664 int num_ready = 0; 665 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 666 hci_connection_t * connection = (hci_connection_t *) it; 667 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 668 if (connection->sco_tx_ready == 0) continue; 669 num_ready++; 670 } 671 return num_ready; 672 } 673 } 674 #endif 675 676 // only used to send HCI Host Number Completed Packets 677 static int hci_can_send_comand_packet_transport(void){ 678 if (hci_stack->hci_packet_buffer_reserved) return 0; 679 680 // check for async hci transport implementations 681 if (hci_stack->hci_transport->can_send_packet_now){ 682 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 683 return 0; 684 } 685 } 686 return 1; 687 } 688 689 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 690 bool hci_can_send_command_packet_now(void){ 691 if (hci_can_send_comand_packet_transport() == 0) return false; 692 return hci_stack->num_cmd_packets > 0u; 693 } 694 695 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 696 // check for async hci transport implementations 697 if (!hci_stack->hci_transport->can_send_packet_now) return true; 698 return hci_stack->hci_transport->can_send_packet_now(packet_type); 699 } 700 701 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 702 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 703 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 704 } 705 706 bool hci_can_send_acl_le_packet_now(void){ 707 if (hci_stack->hci_packet_buffer_reserved) return false; 708 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 709 } 710 711 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 712 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 713 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 714 } 715 716 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 717 if (hci_stack->hci_packet_buffer_reserved) return false; 718 return hci_can_send_prepared_acl_packet_now(con_handle); 719 } 720 721 #ifdef ENABLE_CLASSIC 722 bool hci_can_send_acl_classic_packet_now(void){ 723 if (hci_stack->hci_packet_buffer_reserved) return false; 724 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 725 } 726 727 bool hci_can_send_prepared_sco_packet_now(void){ 728 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 729 if (hci_have_usb_transport()){ 730 return hci_stack->sco_can_send_now; 731 } else { 732 return hci_number_free_sco_slots() > 0; 733 } 734 } 735 736 bool hci_can_send_sco_packet_now(void){ 737 if (hci_stack->hci_packet_buffer_reserved) return false; 738 return hci_can_send_prepared_sco_packet_now(); 739 } 740 741 void hci_request_sco_can_send_now_event(void){ 742 hci_stack->sco_waiting_for_can_send_now = 1; 743 hci_notify_if_sco_can_send_now(); 744 } 745 #endif 746 747 // used for internal checks in l2cap.c 748 bool hci_is_packet_buffer_reserved(void){ 749 return hci_stack->hci_packet_buffer_reserved; 750 } 751 752 // reserves outgoing packet buffer. 753 // @return 1 if successful 754 bool hci_reserve_packet_buffer(void){ 755 if (hci_stack->hci_packet_buffer_reserved) { 756 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 757 return false; 758 } 759 hci_stack->hci_packet_buffer_reserved = true; 760 return true; 761 } 762 763 void hci_release_packet_buffer(void){ 764 hci_stack->hci_packet_buffer_reserved = false; 765 } 766 767 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 768 static int hci_transport_synchronous(void){ 769 return hci_stack->hci_transport->can_send_packet_now == NULL; 770 } 771 772 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 773 774 // 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); 775 776 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 777 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 778 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 779 max_acl_data_packet_length = hci_stack->le_data_packets_length; 780 } 781 782 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 783 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 784 max_acl_data_packet_length = connection->le_max_tx_octets; 785 } 786 #endif 787 788 log_debug("hci_send_acl_packet_fragments entered"); 789 790 uint8_t status = ERROR_CODE_SUCCESS; 791 // multiple packets could be send on a synchronous HCI transport 792 while (true){ 793 794 log_debug("hci_send_acl_packet_fragments loop entered"); 795 796 // get current data 797 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 798 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 799 bool more_fragments = false; 800 801 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 802 if (current_acl_data_packet_length > max_acl_data_packet_length){ 803 more_fragments = true; 804 current_acl_data_packet_length = max_acl_data_packet_length; 805 } 806 807 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 808 if (acl_header_pos > 0u){ 809 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 810 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 811 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 812 } 813 814 // update header len 815 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 816 817 // count packet 818 connection->num_packets_sent++; 819 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 820 821 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 822 if (more_fragments){ 823 // update start of next fragment to send 824 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 825 } else { 826 // done 827 hci_stack->acl_fragmentation_pos = 0; 828 hci_stack->acl_fragmentation_total_size = 0; 829 } 830 831 // send packet 832 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 833 const int size = current_acl_data_packet_length + 4; 834 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 835 hci_stack->acl_fragmentation_tx_active = 1; 836 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 837 if (err != 0){ 838 // no error from HCI Transport expected 839 status = ERROR_CODE_HARDWARE_FAILURE; 840 } 841 842 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 843 844 // done yet? 845 if (!more_fragments) break; 846 847 // can send more? 848 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 849 } 850 851 log_debug("hci_send_acl_packet_fragments loop over"); 852 853 // release buffer now for synchronous transport 854 if (hci_transport_synchronous()){ 855 hci_stack->acl_fragmentation_tx_active = 0; 856 hci_release_packet_buffer(); 857 hci_emit_transport_packet_sent(); 858 } 859 860 return status; 861 } 862 863 // pre: caller has reserved the packet buffer 864 uint8_t hci_send_acl_packet_buffer(int size){ 865 btstack_assert(hci_stack->hci_packet_buffer_reserved); 866 867 uint8_t * packet = hci_stack->hci_packet_buffer; 868 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 869 870 // check for free places on Bluetooth module 871 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 872 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 873 hci_release_packet_buffer(); 874 hci_emit_transport_packet_sent(); 875 return BTSTACK_ACL_BUFFERS_FULL; 876 } 877 878 hci_connection_t *connection = hci_connection_for_handle( con_handle); 879 if (!connection) { 880 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 881 hci_release_packet_buffer(); 882 hci_emit_transport_packet_sent(); 883 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 884 } 885 886 #ifdef ENABLE_CLASSIC 887 hci_connection_timestamp(connection); 888 #endif 889 890 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 891 892 // setup data 893 hci_stack->acl_fragmentation_total_size = size; 894 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 895 896 return hci_send_acl_packet_fragments(connection); 897 } 898 899 #ifdef ENABLE_CLASSIC 900 // pre: caller has reserved the packet buffer 901 uint8_t hci_send_sco_packet_buffer(int size){ 902 btstack_assert(hci_stack->hci_packet_buffer_reserved); 903 904 uint8_t * packet = hci_stack->hci_packet_buffer; 905 906 // skip checks in loopback mode 907 if (!hci_stack->loopback_mode){ 908 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 909 910 // check for free places on Bluetooth module 911 if (!hci_can_send_prepared_sco_packet_now()) { 912 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 913 hci_release_packet_buffer(); 914 hci_emit_transport_packet_sent(); 915 return BTSTACK_ACL_BUFFERS_FULL; 916 } 917 918 // track send packet in connection struct 919 hci_connection_t *connection = hci_connection_for_handle( con_handle); 920 if (!connection) { 921 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 922 hci_release_packet_buffer(); 923 hci_emit_transport_packet_sent(); 924 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 925 } 926 927 if (hci_have_usb_transport()){ 928 // token used 929 hci_stack->sco_can_send_now = false; 930 } else { 931 if (hci_stack->synchronous_flow_control_enabled){ 932 connection->num_packets_sent++; 933 } else { 934 connection->sco_tx_ready--; 935 } 936 } 937 } 938 939 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 940 941 #ifdef HAVE_SCO_TRANSPORT 942 hci_stack->sco_transport->send_packet(packet, size); 943 hci_release_packet_buffer(); 944 hci_emit_transport_packet_sent(); 945 946 return 0; 947 #else 948 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 949 if (hci_transport_synchronous()){ 950 hci_release_packet_buffer(); 951 hci_emit_transport_packet_sent(); 952 } 953 954 if (err != 0){ 955 return ERROR_CODE_HARDWARE_FAILURE; 956 } 957 return ERROR_CODE_SUCCESS; 958 #endif 959 } 960 #endif 961 962 static void acl_handler(uint8_t *packet, uint16_t size){ 963 964 // get info 965 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 966 hci_connection_t *conn = hci_connection_for_handle(con_handle); 967 uint8_t acl_flags = READ_ACL_FLAGS(packet); 968 uint16_t acl_length = READ_ACL_LENGTH(packet); 969 970 // ignore non-registered handle 971 if (!conn){ 972 log_error("acl_handler called with non-registered handle %u!" , con_handle); 973 return; 974 } 975 976 // assert packet is complete 977 if ((acl_length + 4u) != size){ 978 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 979 return; 980 } 981 982 #ifdef ENABLE_CLASSIC 983 // update idle timestamp 984 hci_connection_timestamp(conn); 985 #endif 986 987 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 988 hci_stack->host_completed_packets = 1; 989 conn->num_packets_completed++; 990 #endif 991 992 // handle different packet types 993 switch (acl_flags & 0x03u) { 994 995 case 0x01: // continuation fragment 996 997 // sanity checks 998 if (conn->acl_recombination_pos == 0u) { 999 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1000 return; 1001 } 1002 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1003 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1004 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1005 conn->acl_recombination_pos = 0; 1006 return; 1007 } 1008 1009 // append fragment payload (header already stored) 1010 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1011 &packet[4], acl_length); 1012 conn->acl_recombination_pos += acl_length; 1013 1014 // forward complete L2CAP packet if complete. 1015 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1016 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1017 // reset recombination buffer 1018 conn->acl_recombination_length = 0; 1019 conn->acl_recombination_pos = 0; 1020 } 1021 break; 1022 1023 case 0x02: { // first fragment 1024 1025 // sanity check 1026 if (conn->acl_recombination_pos) { 1027 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1028 conn->acl_recombination_pos = 0; 1029 } 1030 1031 // peek into L2CAP packet! 1032 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1033 1034 // compare fragment size to L2CAP packet size 1035 if (acl_length >= (l2cap_length + 4u)){ 1036 // forward fragment as L2CAP packet 1037 hci_emit_acl_packet(packet, acl_length + 4u); 1038 } else { 1039 1040 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1041 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1042 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1043 return; 1044 } 1045 1046 // store first fragment and tweak acl length for complete package 1047 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1048 packet, acl_length + 4u); 1049 conn->acl_recombination_pos = acl_length + 4u; 1050 conn->acl_recombination_length = l2cap_length; 1051 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1052 } 1053 break; 1054 1055 } 1056 default: 1057 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1058 return; 1059 } 1060 1061 // execute main loop 1062 hci_run(); 1063 } 1064 1065 static void hci_connection_stop_timer(hci_connection_t * conn){ 1066 btstack_run_loop_remove_timer(&conn->timeout); 1067 #ifdef ENABLE_CLASSIC 1068 btstack_run_loop_remove_timer(&conn->timeout_sco); 1069 #endif 1070 } 1071 1072 static void hci_shutdown_connection(hci_connection_t *conn){ 1073 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1074 1075 #ifdef ENABLE_CLASSIC 1076 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1077 bd_addr_type_t addr_type = conn->address_type; 1078 #endif 1079 #ifdef HAVE_SCO_TRANSPORT 1080 hci_con_handle_t con_handle = conn->con_handle; 1081 #endif 1082 #endif 1083 1084 hci_connection_stop_timer(conn); 1085 1086 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1087 btstack_memory_hci_connection_free( conn ); 1088 1089 // now it's gone 1090 hci_emit_nr_connections_changed(); 1091 1092 #ifdef ENABLE_CLASSIC 1093 #ifdef ENABLE_SCO_OVER_HCI 1094 // update SCO 1095 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1096 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1097 } 1098 #endif 1099 #ifdef HAVE_SCO_TRANSPORT 1100 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1101 hci_stack->sco_transport->close(con_handle); 1102 } 1103 #endif 1104 #endif 1105 } 1106 1107 #ifdef ENABLE_CLASSIC 1108 1109 static const uint16_t packet_type_sizes[] = { 1110 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1111 HCI_ACL_DH1_SIZE, 0, 0, 0, 1112 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1113 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1114 }; 1115 static const uint8_t packet_type_feature_requirement_bit[] = { 1116 0, // 3 slot packets 1117 1, // 5 slot packets 1118 25, // EDR 2 mpbs 1119 26, // EDR 3 mbps 1120 39, // 3 slot EDR packts 1121 40, // 5 slot EDR packet 1122 }; 1123 static const uint16_t packet_type_feature_packet_mask[] = { 1124 0x0f00, // 3 slot packets 1125 0xf000, // 5 slot packets 1126 0x1102, // EDR 2 mpbs 1127 0x2204, // EDR 3 mbps 1128 0x0300, // 3 slot EDR packts 1129 0x3000, // 5 slot EDR packet 1130 }; 1131 1132 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1133 // enable packet types based on size 1134 uint16_t packet_types = 0; 1135 unsigned int i; 1136 for (i=0;i<16;i++){ 1137 if (packet_type_sizes[i] == 0) continue; 1138 if (packet_type_sizes[i] <= buffer_size){ 1139 packet_types |= 1 << i; 1140 } 1141 } 1142 // disable packet types due to missing local supported features 1143 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1144 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1145 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1146 if (feature_set) continue; 1147 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1148 packet_types &= ~packet_type_feature_packet_mask[i]; 1149 } 1150 // flip bits for "may not be used" 1151 packet_types ^= 0x3306; 1152 return packet_types; 1153 } 1154 1155 uint16_t hci_usable_acl_packet_types(void){ 1156 return hci_stack->packet_types; 1157 } 1158 #endif 1159 1160 uint8_t* hci_get_outgoing_packet_buffer(void){ 1161 // hci packet buffer is >= acl data packet length 1162 return hci_stack->hci_packet_buffer; 1163 } 1164 1165 uint16_t hci_max_acl_data_packet_length(void){ 1166 return hci_stack->acl_data_packet_length; 1167 } 1168 1169 #ifdef ENABLE_CLASSIC 1170 bool hci_extended_sco_link_supported(void){ 1171 // No. 31, byte 3, bit 7 1172 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1173 } 1174 #endif 1175 1176 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1177 // No. 54, byte 6, bit 6 1178 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1179 } 1180 1181 #ifdef ENABLE_CLASSIC 1182 static int gap_ssp_supported(void){ 1183 // No. 51, byte 6, bit 3 1184 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1185 } 1186 #endif 1187 1188 static int hci_classic_supported(void){ 1189 #ifdef ENABLE_CLASSIC 1190 // No. 37, byte 4, bit 5, = No BR/EDR Support 1191 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1192 #else 1193 return 0; 1194 #endif 1195 } 1196 1197 static int hci_le_supported(void){ 1198 #ifdef ENABLE_BLE 1199 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1200 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1201 #else 1202 return 0; 1203 #endif 1204 } 1205 1206 #ifdef ENABLE_BLE 1207 1208 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1209 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1210 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1211 } else { 1212 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1213 } 1214 } 1215 1216 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1217 *addr_type = hci_stack->le_own_addr_type; 1218 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1219 } 1220 1221 #ifdef ENABLE_LE_PERIPHERAL 1222 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1223 *addr_type = hci_stack->le_advertisements_own_addr_type; 1224 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1225 }; 1226 #endif 1227 1228 #ifdef ENABLE_LE_CENTRAL 1229 1230 /** 1231 * @brief Get own addr type and address used for LE connections (Central) 1232 */ 1233 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1234 *addr_type = hci_stack->le_connection_own_addr_type; 1235 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1236 } 1237 1238 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1239 1240 int offset = 3; 1241 int num_reports = packet[offset]; 1242 offset += 1; 1243 1244 int i; 1245 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1246 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1247 for (i=0; (i<num_reports) && (offset < size);i++){ 1248 // sanity checks on data_length: 1249 uint8_t data_length = packet[offset + 8]; 1250 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1251 if ((offset + 9u + data_length + 1u) > size) return; 1252 // setup event 1253 uint8_t event_size = 10u + data_length; 1254 int pos = 0; 1255 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1256 event[pos++] = event_size; 1257 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1258 offset += 8; 1259 pos += 8; 1260 event[pos++] = packet[offset + 1 + data_length]; // rssi 1261 event[pos++] = data_length; 1262 offset++; 1263 (void)memcpy(&event[pos], &packet[offset], data_length); 1264 pos += data_length; 1265 offset += data_length + 1u; // rssi 1266 hci_emit_event(event, pos, 1); 1267 } 1268 } 1269 #endif 1270 #endif 1271 1272 #ifdef ENABLE_BLE 1273 #ifdef ENABLE_LE_PERIPHERAL 1274 static void hci_update_advertisements_enabled_for_current_roles(void){ 1275 if (hci_stack->le_advertisements_enabled){ 1276 // get number of active le slave connections 1277 int num_slave_connections = 0; 1278 btstack_linked_list_iterator_t it; 1279 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1280 while (btstack_linked_list_iterator_has_next(&it)){ 1281 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1282 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1283 if (con->state != OPEN) continue; 1284 if (con->role != HCI_ROLE_SLAVE) continue; 1285 if (!hci_is_le_connection(con)) continue; 1286 num_slave_connections++; 1287 } 1288 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1289 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1290 } else { 1291 hci_stack->le_advertisements_enabled_for_current_roles = false; 1292 } 1293 } 1294 #endif 1295 #endif 1296 1297 #ifdef ENABLE_CLASSIC 1298 static void gap_run_set_local_name(void){ 1299 hci_reserve_packet_buffer(); 1300 uint8_t * packet = hci_stack->hci_packet_buffer; 1301 // construct HCI Command and send 1302 uint16_t opcode = hci_write_local_name.opcode; 1303 hci_stack->last_cmd_opcode = opcode; 1304 packet[0] = opcode & 0xff; 1305 packet[1] = opcode >> 8; 1306 packet[2] = DEVICE_NAME_LEN; 1307 memset(&packet[3], 0, DEVICE_NAME_LEN); 1308 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1309 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1310 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1311 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1312 // expand '00:00:00:00:00:00' in name with bd_addr 1313 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1315 } 1316 1317 static void gap_run_set_eir_data(void){ 1318 hci_reserve_packet_buffer(); 1319 uint8_t * packet = hci_stack->hci_packet_buffer; 1320 // construct HCI Command in-place and send 1321 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1322 hci_stack->last_cmd_opcode = opcode; 1323 uint16_t offset = 0; 1324 packet[offset++] = opcode & 0xff; 1325 packet[offset++] = opcode >> 8; 1326 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1327 packet[offset++] = 0; // FEC not required 1328 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1329 if (hci_stack->eir_data){ 1330 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1331 ad_context_t context; 1332 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1333 uint8_t data_type = ad_iterator_get_data_type(&context); 1334 uint8_t size = ad_iterator_get_data_len(&context); 1335 const uint8_t *data = ad_iterator_get_data(&context); 1336 // copy item 1337 packet[offset++] = size + 1; 1338 packet[offset++] = data_type; 1339 memcpy(&packet[offset], data, size); 1340 // update name item 1341 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1342 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1343 } 1344 offset += size; 1345 } 1346 } else { 1347 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1348 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1349 packet[offset++] = bytes_to_copy + 1; 1350 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1351 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1352 // expand '00:00:00:00:00:00' in name with bd_addr 1353 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1354 } 1355 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1356 } 1357 1358 static void hci_run_gap_tasks_classic(void){ 1359 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1360 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1361 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1362 return; 1363 } 1364 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1365 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1366 gap_run_set_local_name(); 1367 return; 1368 } 1369 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1370 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1371 gap_run_set_eir_data(); 1372 return; 1373 } 1374 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1375 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1376 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1377 return; 1378 } 1379 // write page scan activity 1380 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1381 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1382 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1383 return; 1384 } 1385 // write page scan type 1386 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1387 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1388 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1389 return; 1390 } 1391 // write page timeout 1392 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1393 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1394 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1395 return; 1396 } 1397 // send scan enable 1398 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1399 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1400 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1401 return; 1402 } 1403 // send write scan activity 1404 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1405 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1406 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1407 return; 1408 } 1409 } 1410 #endif 1411 1412 #ifndef HAVE_HOST_CONTROLLER_API 1413 1414 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1415 if (!hci_stack->config) return 0; 1416 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1417 // Limit baud rate for Broadcom chipsets to 3 mbps 1418 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1419 baud_rate = 3000000; 1420 } 1421 return baud_rate; 1422 } 1423 1424 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1425 UNUSED(ds); 1426 1427 switch (hci_stack->substate){ 1428 case HCI_INIT_W4_SEND_RESET: 1429 log_info("Resend HCI Reset"); 1430 hci_stack->substate = HCI_INIT_SEND_RESET; 1431 hci_stack->num_cmd_packets = 1; 1432 hci_run(); 1433 break; 1434 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1435 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1436 if (hci_stack->hci_transport->reset_link){ 1437 hci_stack->hci_transport->reset_link(); 1438 } 1439 1440 /* fall through */ 1441 1442 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1443 log_info("Resend HCI Reset - CSR Warm Boot"); 1444 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1445 hci_stack->num_cmd_packets = 1; 1446 hci_run(); 1447 break; 1448 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1449 if (hci_stack->hci_transport->set_baudrate){ 1450 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1451 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1452 hci_stack->hci_transport->set_baudrate(baud_rate); 1453 } 1454 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1455 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1456 if (hci_stack->hci_transport->reset_link){ 1457 log_info("Link Reset"); 1458 hci_stack->hci_transport->reset_link(); 1459 } 1460 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1461 hci_run(); 1462 } 1463 break; 1464 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1465 // otherwise continue 1466 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1467 hci_send_cmd(&hci_read_local_supported_commands); 1468 break; 1469 default: 1470 break; 1471 } 1472 } 1473 #endif 1474 1475 static void hci_initializing_next_state(void){ 1476 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1477 } 1478 1479 static void hci_init_done(void){ 1480 // done. tell the app 1481 log_info("hci_init_done -> HCI_STATE_WORKING"); 1482 hci_stack->state = HCI_STATE_WORKING; 1483 hci_emit_state(); 1484 } 1485 1486 // assumption: hci_can_send_command_packet_now() == true 1487 static void hci_initializing_run(void){ 1488 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1489 1490 if (!hci_can_send_command_packet_now()) return; 1491 1492 #ifndef HAVE_HOST_CONTROLLER_API 1493 bool need_baud_change = hci_stack->config 1494 && hci_stack->chipset 1495 && hci_stack->chipset->set_baudrate_command 1496 && hci_stack->hci_transport->set_baudrate 1497 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1498 #endif 1499 1500 switch (hci_stack->substate){ 1501 case HCI_INIT_SEND_RESET: 1502 hci_state_reset(); 1503 1504 #ifndef HAVE_HOST_CONTROLLER_API 1505 // prepare reset if command complete not received in 100ms 1506 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1507 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1508 btstack_run_loop_add_timer(&hci_stack->timeout); 1509 #endif 1510 // send command 1511 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1512 hci_send_cmd(&hci_reset); 1513 break; 1514 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1515 hci_send_cmd(&hci_read_local_version_information); 1516 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1517 break; 1518 1519 #ifndef HAVE_HOST_CONTROLLER_API 1520 case HCI_INIT_SEND_READ_LOCAL_NAME: 1521 hci_send_cmd(&hci_read_local_name); 1522 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1523 break; 1524 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1525 hci_state_reset(); 1526 // prepare reset if command complete not received in 100ms 1527 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1528 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1529 btstack_run_loop_add_timer(&hci_stack->timeout); 1530 // send command 1531 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1532 hci_send_cmd(&hci_reset); 1533 break; 1534 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1535 hci_state_reset(); 1536 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1537 hci_send_cmd(&hci_reset); 1538 break; 1539 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1540 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1541 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1542 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1543 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1544 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1545 break; 1546 } 1547 case HCI_INIT_SET_BD_ADDR: 1548 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1549 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1550 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1551 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1552 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1553 break; 1554 case HCI_INIT_SEND_BAUD_CHANGE: 1555 if (need_baud_change) { 1556 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1557 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1558 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1559 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1560 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1561 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1562 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1563 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1564 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1565 btstack_run_loop_add_timer(&hci_stack->timeout); 1566 } 1567 break; 1568 } 1569 1570 /* fall through */ 1571 1572 case HCI_INIT_CUSTOM_INIT: 1573 // Custom initialization 1574 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1575 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1576 bool send_cmd = false; 1577 switch (hci_stack->chipset_result){ 1578 case BTSTACK_CHIPSET_VALID_COMMAND: 1579 send_cmd = true; 1580 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1581 break; 1582 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1583 send_cmd = true; 1584 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1585 log_info("CSR Warm Boot"); 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 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1590 && hci_stack->config 1591 && hci_stack->chipset 1592 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1593 && hci_stack->hci_transport->set_baudrate 1594 && hci_transport_uart_get_main_baud_rate()){ 1595 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1596 } else { 1597 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1598 } 1599 break; 1600 default: 1601 break; 1602 } 1603 1604 if (send_cmd){ 1605 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1606 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1607 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1608 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1609 break; 1610 } 1611 log_info("Init script done"); 1612 1613 // Init script download on Broadcom chipsets causes: 1614 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1615 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1616 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1617 1618 // - baud rate to reset, restore UART baud rate if needed 1619 if (need_baud_change) { 1620 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1621 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1622 hci_stack->hci_transport->set_baudrate(baud_rate); 1623 } 1624 1625 uint16_t bcm_delay_ms = 300; 1626 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1627 // -> Work around: wait here. 1628 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1629 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1630 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1631 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1632 btstack_run_loop_add_timer(&hci_stack->timeout); 1633 break; 1634 } 1635 } 1636 #endif 1637 /* fall through */ 1638 1639 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1640 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1641 hci_send_cmd(&hci_read_local_supported_commands); 1642 break; 1643 case HCI_INIT_READ_BD_ADDR: 1644 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1645 hci_send_cmd(&hci_read_bd_addr); 1646 break; 1647 case HCI_INIT_READ_BUFFER_SIZE: 1648 // only read buffer size if supported 1649 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1650 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1651 hci_send_cmd(&hci_read_buffer_size); 1652 break; 1653 } 1654 1655 /* fall through */ 1656 1657 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1658 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1659 hci_send_cmd(&hci_read_local_supported_features); 1660 break; 1661 1662 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1663 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1664 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1665 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1666 break; 1667 case HCI_INIT_HOST_BUFFER_SIZE: 1668 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1669 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1670 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1671 break; 1672 #endif 1673 1674 case HCI_INIT_SET_EVENT_MASK: 1675 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1676 if (hci_le_supported()){ 1677 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1678 } else { 1679 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1680 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1681 } 1682 break; 1683 1684 #ifdef ENABLE_CLASSIC 1685 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1686 if (hci_classic_supported() && gap_ssp_supported()){ 1687 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1688 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1689 break; 1690 } 1691 1692 /* fall through */ 1693 1694 case HCI_INIT_WRITE_INQUIRY_MODE: 1695 if (hci_classic_supported()){ 1696 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1697 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1698 break; 1699 } 1700 1701 /* fall through */ 1702 1703 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1704 // skip write secure connections host support if not supported or disabled 1705 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1706 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1707 hci_stack->secure_connections_active = true; 1708 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1709 break; 1710 } 1711 1712 #ifdef ENABLE_SCO_OVER_HCI 1713 /* fall through */ 1714 1715 // only sent if ENABLE_SCO_OVER_HCI is defined 1716 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1717 // skip write synchronous flow control if not supported 1718 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1719 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1720 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1721 break; 1722 } 1723 /* fall through */ 1724 1725 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1726 // skip write default erroneous data reporting if not supported 1727 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1728 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1729 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1730 break; 1731 } 1732 #endif 1733 1734 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1735 /* fall through */ 1736 1737 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1738 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1739 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1740 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1741 #ifdef ENABLE_SCO_OVER_HCI 1742 log_info("BCM: Route SCO data via HCI transport"); 1743 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1744 #endif 1745 #ifdef ENABLE_SCO_OVER_PCM 1746 log_info("BCM: Route SCO data via PCM interface"); 1747 #ifdef ENABLE_BCM_PCM_WBS 1748 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1749 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1750 #else 1751 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1752 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1753 #endif 1754 #endif 1755 break; 1756 } 1757 #endif 1758 1759 #ifdef ENABLE_SCO_OVER_PCM 1760 /* fall through */ 1761 1762 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1763 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1764 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1765 log_info("BCM: Config PCM interface for I2S"); 1766 #ifdef ENABLE_BCM_PCM_WBS 1767 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1768 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1769 #else 1770 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1771 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1772 #endif 1773 break; 1774 } 1775 #endif 1776 #endif 1777 1778 #ifdef ENABLE_BLE 1779 /* fall through */ 1780 1781 // LE INIT 1782 case HCI_INIT_LE_READ_BUFFER_SIZE: 1783 if (hci_le_supported()){ 1784 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1785 hci_send_cmd(&hci_le_read_buffer_size); 1786 break; 1787 } 1788 1789 /* fall through */ 1790 1791 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1792 // skip write le host if not supported (e.g. on LE only EM9301) 1793 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1794 // LE Supported Host = 1, Simultaneous Host = 0 1795 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1796 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1797 break; 1798 } 1799 1800 /* fall through */ 1801 1802 case HCI_INIT_LE_SET_EVENT_MASK: 1803 if (hci_le_supported()){ 1804 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1805 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1806 break; 1807 } 1808 #endif 1809 1810 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1811 /* fall through */ 1812 1813 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1814 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1815 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1816 hci_send_cmd(&hci_le_read_maximum_data_length); 1817 break; 1818 } 1819 1820 /* fall through */ 1821 1822 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1823 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1824 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1825 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1826 break; 1827 } 1828 #endif 1829 1830 #ifdef ENABLE_LE_CENTRAL 1831 /* fall through */ 1832 1833 case HCI_INIT_READ_WHITE_LIST_SIZE: 1834 if (hci_le_supported()){ 1835 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1836 hci_send_cmd(&hci_le_read_white_list_size); 1837 break; 1838 } 1839 1840 #endif 1841 1842 /* fall through */ 1843 1844 case HCI_INIT_DONE: 1845 hci_stack->substate = HCI_INIT_DONE; 1846 // main init sequence complete 1847 #ifdef ENABLE_CLASSIC 1848 // check if initial Classic GAP Tasks are completed 1849 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1850 hci_run_gap_tasks_classic(); 1851 break; 1852 } 1853 #endif 1854 #ifdef ENABLE_BLE 1855 #ifdef ENABLE_LE_CENTRAL 1856 // check if initial LE GAP Tasks are completed 1857 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1858 hci_run_general_gap_le(); 1859 break; 1860 } 1861 #endif 1862 #endif 1863 hci_init_done(); 1864 break; 1865 1866 default: 1867 return; 1868 } 1869 } 1870 1871 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1872 bool command_completed = false; 1873 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1874 uint16_t opcode = little_endian_read_16(packet,3); 1875 if (opcode == hci_stack->last_cmd_opcode){ 1876 command_completed = true; 1877 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1878 } else { 1879 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1880 } 1881 } 1882 1883 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1884 uint8_t status = packet[2]; 1885 uint16_t opcode = little_endian_read_16(packet,4); 1886 if (opcode == hci_stack->last_cmd_opcode){ 1887 if (status){ 1888 command_completed = true; 1889 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1890 } else { 1891 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1892 } 1893 } else { 1894 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1895 } 1896 } 1897 #ifndef HAVE_HOST_CONTROLLER_API 1898 // Vendor == CSR 1899 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1900 // TODO: track actual command 1901 command_completed = true; 1902 } 1903 1904 // Vendor == Toshiba 1905 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1906 // TODO: track actual command 1907 command_completed = true; 1908 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1909 hci_stack->num_cmd_packets = 1; 1910 } 1911 #endif 1912 1913 return command_completed; 1914 } 1915 1916 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1917 1918 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1919 1920 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1921 1922 #ifndef HAVE_HOST_CONTROLLER_API 1923 1924 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1925 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1926 // 1927 // HCI Reset 1928 // Timeout 100 ms 1929 // HCI Reset 1930 // Command Complete Reset 1931 // HCI Read Local Version Information 1932 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1933 // hang... 1934 // 1935 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1936 if (!command_completed 1937 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1938 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1939 1940 uint16_t opcode = little_endian_read_16(packet,3); 1941 if (opcode == hci_reset.opcode){ 1942 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1943 return; 1944 } 1945 } 1946 1947 // CSR & H5 1948 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1949 if (!command_completed 1950 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1951 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1952 1953 uint16_t opcode = little_endian_read_16(packet,3); 1954 if (opcode == hci_reset.opcode){ 1955 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1956 return; 1957 } 1958 } 1959 1960 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1961 // fix: Correct substate and behave as command below 1962 if (command_completed){ 1963 switch (hci_stack->substate){ 1964 case HCI_INIT_SEND_RESET: 1965 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1966 break; 1967 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1968 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1969 break; 1970 default: 1971 break; 1972 } 1973 } 1974 1975 #endif 1976 1977 if (!command_completed) return; 1978 1979 bool need_baud_change = false; 1980 bool need_addr_change = false; 1981 1982 #ifndef HAVE_HOST_CONTROLLER_API 1983 need_baud_change = hci_stack->config 1984 && hci_stack->chipset 1985 && hci_stack->chipset->set_baudrate_command 1986 && hci_stack->hci_transport->set_baudrate 1987 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1988 1989 need_addr_change = hci_stack->custom_bd_addr_set 1990 && hci_stack->chipset 1991 && hci_stack->chipset->set_bd_addr_command; 1992 #endif 1993 1994 switch(hci_stack->substate){ 1995 1996 #ifndef HAVE_HOST_CONTROLLER_API 1997 case HCI_INIT_SEND_RESET: 1998 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1999 // fix: just correct substate and behave as command below 2000 2001 /* fall through */ 2002 #endif 2003 2004 case HCI_INIT_W4_SEND_RESET: 2005 btstack_run_loop_remove_timer(&hci_stack->timeout); 2006 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2007 return; 2008 2009 #ifndef HAVE_HOST_CONTROLLER_API 2010 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2011 // for STLC2500D, baud rate change already happened. 2012 // for others, baud rate gets changed now 2013 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2014 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2015 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2016 hci_stack->hci_transport->set_baudrate(baud_rate); 2017 } 2018 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2019 return; 2020 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2021 btstack_run_loop_remove_timer(&hci_stack->timeout); 2022 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2023 return; 2024 case HCI_INIT_W4_CUSTOM_INIT: 2025 // repeat custom init 2026 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2027 return; 2028 #endif 2029 2030 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2031 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2032 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2033 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2034 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2035 return; 2036 } 2037 if (need_addr_change){ 2038 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2039 return; 2040 } 2041 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2042 return; 2043 #ifndef HAVE_HOST_CONTROLLER_API 2044 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2045 if (need_baud_change){ 2046 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2047 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2048 hci_stack->hci_transport->set_baudrate(baud_rate); 2049 } 2050 if (need_addr_change){ 2051 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2052 return; 2053 } 2054 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2055 return; 2056 case HCI_INIT_W4_SET_BD_ADDR: 2057 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2058 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2059 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2060 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2061 return; 2062 } 2063 // skipping st warm boot 2064 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2065 return; 2066 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2067 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2068 return; 2069 #endif 2070 2071 case HCI_INIT_DONE: 2072 // set state if we came here by fall through 2073 hci_stack->substate = HCI_INIT_DONE; 2074 return; 2075 2076 default: 2077 break; 2078 } 2079 hci_initializing_next_state(); 2080 } 2081 2082 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2083 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2084 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2085 // check if the hci connection has been outgoing 2086 switch (conn->state){ 2087 case SEND_CREATE_CONNECTION: 2088 case RECEIVED_CONNECTION_REQUEST: 2089 break; 2090 default: 2091 return; 2092 } 2093 2094 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2095 bd_addr_t bd_address; 2096 (void)memcpy(&bd_address, conn->address, 6); 2097 2098 #ifdef ENABLE_CLASSIC 2099 // cache needed data 2100 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2101 #endif 2102 2103 // connection failed, remove entry 2104 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2105 btstack_memory_hci_connection_free( conn ); 2106 2107 #ifdef ENABLE_CLASSIC 2108 // notify client if dedicated bonding 2109 if (notify_dedicated_bonding_failed){ 2110 log_info("hci notify_dedicated_bonding_failed"); 2111 hci_emit_dedicated_bonding_result(bd_address, status); 2112 } 2113 2114 // if authentication error, also delete link key 2115 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2116 gap_drop_link_key_for_bd_addr(bd_address); 2117 } 2118 #else 2119 UNUSED(status); 2120 #endif 2121 } 2122 2123 #ifdef ENABLE_CLASSIC 2124 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2125 // SSP Controller 2126 if (features[6] & (1 << 3)){ 2127 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2128 } 2129 // eSCO 2130 if (features[3] & (1<<7)){ 2131 conn->remote_supported_features[0] |= 1; 2132 } 2133 // Extended features 2134 if (features[7] & (1<<7)){ 2135 conn->remote_supported_features[0] |= 2; 2136 } 2137 } 2138 2139 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2140 // SSP Host 2141 if (features[0] & (1 << 0)){ 2142 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2143 } 2144 // SC Host 2145 if (features[0] & (1 << 3)){ 2146 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2147 } 2148 } 2149 2150 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2151 // SC Controller 2152 if (features[1] & (1 << 0)){ 2153 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2154 } 2155 } 2156 2157 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2158 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2159 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2160 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2161 if (conn->bonding_flags & BONDING_DEDICATED){ 2162 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2163 } 2164 } 2165 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2166 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2167 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2168 } 2169 2170 #endif 2171 2172 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2173 // handle BT initialization 2174 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2175 hci_initializing_event_handler(packet, size); 2176 } 2177 2178 // help with BT sleep 2179 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2180 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2181 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2182 hci_initializing_next_state(); 2183 } 2184 } 2185 2186 #ifdef ENABLE_CLASSIC 2187 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2188 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2189 conn->encryption_key_size = encryption_key_size; 2190 2191 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2192 conn->requested_security_level = LEVEL_0; 2193 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2194 return; 2195 } 2196 2197 // Request remote features if not already done 2198 hci_trigger_remote_features_for_connection(conn); 2199 2200 // Request Authentication if not already done 2201 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2202 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2203 } 2204 #endif 2205 2206 static void hci_store_local_supported_commands(const uint8_t * packet){ 2207 // create mapping table 2208 #define X(name, offset, bit) { offset, bit }, 2209 static struct { 2210 uint8_t byte_offset; 2211 uint8_t bit_position; 2212 } supported_hci_commands_map [] = { 2213 SUPPORTED_HCI_COMMANDS 2214 }; 2215 #undef X 2216 2217 // create names for debug purposes 2218 #ifdef ENABLE_LOG_DEBUG 2219 #define X(name, offset, bit) #name, 2220 static const char * command_names[] = { 2221 SUPPORTED_HCI_COMMANDS 2222 }; 2223 #undef X 2224 #endif 2225 2226 memset(hci_stack->local_supported_commands, 0, sizeof(hci_stack->local_supported_commands)); 2227 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2228 uint16_t i; 2229 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2230 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2231 #ifdef ENABLE_LOG_DEBUG 2232 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); 2233 #else 2234 log_info("Enum 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2235 #endif 2236 hci_stack->local_supported_commands[i >> 3] |= (1 << (i & 7 )); 2237 } 2238 } 2239 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2240 } 2241 2242 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2243 UNUSED(size); 2244 2245 uint16_t manufacturer; 2246 #ifdef ENABLE_CLASSIC 2247 hci_con_handle_t handle; 2248 hci_connection_t * conn; 2249 uint8_t status; 2250 #endif 2251 // get num cmd packets - limit to 1 to reduce complexity 2252 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2253 2254 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2255 switch (opcode){ 2256 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2257 if (packet[5]) break; 2258 // terminate, name 248 chars 2259 packet[6+248] = 0; 2260 log_info("local name: %s", &packet[6]); 2261 break; 2262 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2263 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2264 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2265 uint16_t acl_len = little_endian_read_16(packet, 6); 2266 uint16_t sco_len = packet[8]; 2267 2268 // determine usable ACL/SCO payload size 2269 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2270 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2271 2272 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2273 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2274 2275 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2276 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2277 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2278 } 2279 break; 2280 case HCI_OPCODE_HCI_READ_RSSI: 2281 if (packet[5] == ERROR_CODE_SUCCESS){ 2282 uint8_t event[5]; 2283 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2284 event[1] = 3; 2285 (void)memcpy(&event[2], &packet[6], 3); 2286 hci_emit_event(event, sizeof(event), 1); 2287 } 2288 break; 2289 #ifdef ENABLE_BLE 2290 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2291 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2292 hci_stack->le_acl_packets_total_num = packet[8]; 2293 // determine usable ACL payload size 2294 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2295 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2296 } 2297 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2298 break; 2299 #endif 2300 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2301 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2302 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2303 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2304 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); 2305 break; 2306 #endif 2307 #ifdef ENABLE_LE_CENTRAL 2308 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2309 hci_stack->le_whitelist_capacity = packet[6]; 2310 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2311 break; 2312 #endif 2313 case HCI_OPCODE_HCI_READ_BD_ADDR: 2314 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2315 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)); 2316 #ifdef ENABLE_CLASSIC 2317 if (hci_stack->link_key_db){ 2318 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2319 } 2320 #endif 2321 break; 2322 #ifdef ENABLE_CLASSIC 2323 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2324 hci_emit_discoverable_enabled(hci_stack->discoverable); 2325 break; 2326 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2327 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2328 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2329 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2330 hci_emit_event(event, sizeof(event), 1); 2331 } 2332 break; 2333 #endif 2334 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2335 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2336 2337 #ifdef ENABLE_CLASSIC 2338 // determine usable ACL packet types based on host buffer size and supported features 2339 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2340 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2341 #endif 2342 // Classic/LE 2343 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2344 break; 2345 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2346 manufacturer = little_endian_read_16(packet, 10); 2347 // map Cypress to Broadcom 2348 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2349 log_info("Treat Cypress as Broadcom"); 2350 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2351 little_endian_store_16(packet, 10, manufacturer); 2352 } 2353 hci_stack->manufacturer = manufacturer; 2354 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2355 break; 2356 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2357 hci_store_local_supported_commands(packet); 2358 break; 2359 #ifdef ENABLE_CLASSIC 2360 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2361 if (packet[5]) return; 2362 hci_stack->synchronous_flow_control_enabled = 1; 2363 break; 2364 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2365 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2366 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2367 conn = hci_connection_for_handle(handle); 2368 if (conn != NULL) { 2369 uint8_t key_size = 0; 2370 if (status == 0){ 2371 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2372 log_info("Handle %04x key Size: %u", handle, key_size); 2373 } else { 2374 key_size = 1; 2375 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2376 } 2377 hci_handle_read_encryption_key_size_complete(conn, key_size); 2378 } 2379 break; 2380 // assert pairing complete event is emitted. 2381 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2382 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2383 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2384 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2385 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2386 // lookup connection by gap pairing addr 2387 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2388 if (conn == NULL) break; 2389 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2390 break; 2391 2392 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2393 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2394 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2395 uint8_t event[67]; 2396 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2397 event[1] = 65; 2398 (void)memset(&event[2], 0, 65); 2399 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2400 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2401 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2402 event[2] = 3; 2403 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2404 } else { 2405 event[2] = 1; 2406 } 2407 } 2408 hci_emit_event(event, sizeof(event), 0); 2409 break; 2410 } 2411 2412 // note: only needed if user does not provide OOB data 2413 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2414 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2415 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2416 if (conn == NULL) break; 2417 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2418 break; 2419 #endif 2420 #endif 2421 default: 2422 break; 2423 } 2424 } 2425 2426 #ifdef ENABLE_BLE 2427 static void event_handle_le_connection_complete(const uint8_t * packet){ 2428 bd_addr_t addr; 2429 bd_addr_type_t addr_type; 2430 hci_connection_t * conn; 2431 2432 // Connection management 2433 reverse_bd_addr(&packet[8], addr); 2434 addr_type = (bd_addr_type_t)packet[7]; 2435 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2436 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2437 2438 #ifdef ENABLE_LE_CENTRAL 2439 // handle error: error is reported only to the initiator -> outgoing connection 2440 if (packet[3]){ 2441 2442 // handle cancelled outgoing connection 2443 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2444 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2445 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2446 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2447 // reset state 2448 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2449 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2450 // get outgoing connection conn struct for direct connect 2451 conn = gap_get_outgoing_connection(); 2452 } 2453 2454 // outgoing le connection establishment is done 2455 if (conn){ 2456 // remove entry 2457 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2458 btstack_memory_hci_connection_free( conn ); 2459 } 2460 return; 2461 } 2462 #endif 2463 2464 // on success, both hosts receive connection complete event 2465 if (packet[6] == HCI_ROLE_MASTER){ 2466 #ifdef ENABLE_LE_CENTRAL 2467 // if we're master on an le connection, it was an outgoing connection and we're done with it 2468 // note: no hci_connection_t object exists yet for connect with whitelist 2469 if (hci_is_le_connection_type(addr_type)){ 2470 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2471 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2472 } 2473 #endif 2474 } else { 2475 #ifdef ENABLE_LE_PERIPHERAL 2476 // if we're slave, it was an incoming connection, advertisements have stopped 2477 hci_stack->le_advertisements_active = false; 2478 #endif 2479 } 2480 2481 // LE connections are auto-accepted, so just create a connection if there isn't one already 2482 if (!conn){ 2483 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2484 } 2485 2486 // no memory, sorry. 2487 if (!conn){ 2488 return; 2489 } 2490 2491 conn->state = OPEN; 2492 conn->role = packet[6]; 2493 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2494 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2495 2496 #ifdef ENABLE_LE_PERIPHERAL 2497 if (packet[6] == HCI_ROLE_SLAVE){ 2498 hci_update_advertisements_enabled_for_current_roles(); 2499 } 2500 #endif 2501 2502 // init unenhanced att bearer mtu 2503 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2504 conn->att_connection.mtu_exchanged = false; 2505 2506 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2507 2508 // restart timer 2509 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2510 // btstack_run_loop_add_timer(&conn->timeout); 2511 2512 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2513 2514 hci_emit_nr_connections_changed(); 2515 } 2516 #endif 2517 2518 #ifdef ENABLE_CLASSIC 2519 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){ 2520 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2521 // LEVEL_4 is tested by l2cap 2522 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2523 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2524 if (level >= LEVEL_3){ 2525 // MITM not possible without keyboard or display 2526 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2527 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2528 2529 // MITM possible if one side has keyboard and the other has keyboard or display 2530 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2531 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2532 2533 // MITM not possible if one side has only display and other side has no keyboard 2534 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2535 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2536 } 2537 // LEVEL 2 requires SSP, which is a given 2538 return true; 2539 } 2540 2541 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2542 uint16_t i; 2543 for (i=0; i < size ; i++){ 2544 if (data[i] != 0) { 2545 return false; 2546 } 2547 } 2548 return true; 2549 } 2550 2551 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2552 // get requested security level 2553 gap_security_level_t requested_security_level = conn->requested_security_level; 2554 if (hci_stack->gap_secure_connections_only_mode){ 2555 requested_security_level = LEVEL_4; 2556 } 2557 2558 // assess security: LEVEL 4 requires SC 2559 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2560 if ((requested_security_level == LEVEL_4) && 2561 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2562 !hci_remote_sc_enabled(conn)){ 2563 log_info("Level 4 required, but SC not supported -> abort"); 2564 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2565 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2566 return; 2567 } 2568 2569 // assess security based on io capabilities 2570 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2571 // responder: fully validate io caps of both sides as well as OOB data 2572 bool security_possible = false; 2573 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2574 2575 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2576 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2577 // so we merge the OOB data availability 2578 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2579 if (conn->classic_oob_c_192 != NULL){ 2580 have_oob_data |= 1; 2581 } 2582 if (conn->classic_oob_c_256 != NULL){ 2583 have_oob_data |= 2; 2584 } 2585 // for up to Level 3, either P-192 as well as P-256 will do 2586 // 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 2587 // if remote does not SC, we should not receive P-256 data either 2588 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2589 security_possible = true; 2590 } 2591 // for Level 4, P-256 is needed 2592 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2593 security_possible = true; 2594 } 2595 #endif 2596 2597 if (security_possible == false){ 2598 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2599 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2600 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2601 return; 2602 } 2603 } else { 2604 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2605 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2606 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2607 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2608 log_info("Level 3+ required, but no input/output -> abort"); 2609 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2610 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2611 return; 2612 } 2613 #endif 2614 #endif 2615 } 2616 2617 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2618 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2619 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2620 } else { 2621 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2622 } 2623 #endif 2624 } 2625 2626 #endif 2627 2628 static void event_handler(uint8_t *packet, uint16_t size){ 2629 2630 uint16_t event_length = packet[1]; 2631 2632 // assert packet is complete 2633 if (size != (event_length + 2u)){ 2634 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2635 return; 2636 } 2637 2638 bd_addr_type_t addr_type; 2639 hci_con_handle_t handle; 2640 hci_connection_t * conn; 2641 int i; 2642 int create_connection_cmd; 2643 2644 #ifdef ENABLE_CLASSIC 2645 hci_link_type_t link_type; 2646 bd_addr_t addr; 2647 #endif 2648 2649 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2650 2651 switch (hci_event_packet_get_type(packet)) { 2652 2653 case HCI_EVENT_COMMAND_COMPLETE: 2654 handle_command_complete_event(packet, size); 2655 break; 2656 2657 case HCI_EVENT_COMMAND_STATUS: 2658 // get num cmd packets - limit to 1 to reduce complexity 2659 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2660 2661 // check command status to detected failed outgoing connections 2662 create_connection_cmd = 0; 2663 #ifdef ENABLE_CLASSIC 2664 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2665 create_connection_cmd = 1; 2666 } 2667 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2668 create_connection_cmd = 1; 2669 } 2670 #endif 2671 #ifdef ENABLE_LE_CENTRAL 2672 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2673 create_connection_cmd = 1; 2674 } 2675 #endif 2676 if (create_connection_cmd) { 2677 uint8_t status = hci_event_command_status_get_status(packet); 2678 addr_type = hci_stack->outgoing_addr_type; 2679 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2680 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); 2681 2682 // reset outgoing address info 2683 memset(hci_stack->outgoing_addr, 0, 6); 2684 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2685 2686 // on error 2687 if (status != ERROR_CODE_SUCCESS){ 2688 #ifdef ENABLE_LE_CENTRAL 2689 if (hci_is_le_connection_type(addr_type)){ 2690 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2691 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2692 } 2693 #endif 2694 // error => outgoing connection failed 2695 if (conn != NULL){ 2696 hci_handle_connection_failed(conn, status); 2697 } 2698 } 2699 } 2700 2701 #ifdef ENABLE_CLASSIC 2702 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2703 uint8_t status = hci_event_command_status_get_status(packet); 2704 log_info("command status (inquiry), status %x", status); 2705 if (status == ERROR_CODE_SUCCESS) { 2706 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2707 } else { 2708 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2709 } 2710 } 2711 #endif 2712 break; 2713 2714 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2715 if (size < 3) return; 2716 uint16_t num_handles = packet[2]; 2717 if (size != (3u + num_handles * 4u)) return; 2718 uint16_t offset = 3; 2719 for (i=0; i<num_handles;i++){ 2720 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2721 offset += 2u; 2722 uint16_t num_packets = little_endian_read_16(packet, offset); 2723 offset += 2u; 2724 2725 conn = hci_connection_for_handle(handle); 2726 if (!conn){ 2727 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2728 continue; 2729 } 2730 2731 if (conn->num_packets_sent >= num_packets){ 2732 conn->num_packets_sent -= num_packets; 2733 } else { 2734 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2735 conn->num_packets_sent = 0; 2736 } 2737 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2738 2739 #ifdef ENABLE_CLASSIC 2740 // For SCO, we do the can_send_now_check here 2741 hci_notify_if_sco_can_send_now(); 2742 #endif 2743 } 2744 break; 2745 } 2746 2747 #ifdef ENABLE_CLASSIC 2748 case HCI_EVENT_INQUIRY_COMPLETE: 2749 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2750 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2751 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2752 hci_emit_event(event, sizeof(event), 1); 2753 } 2754 break; 2755 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2756 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2757 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2758 } 2759 break; 2760 case HCI_EVENT_CONNECTION_REQUEST: 2761 reverse_bd_addr(&packet[2], addr); 2762 link_type = (hci_link_type_t) packet[11]; 2763 2764 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2765 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2766 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2767 bd_addr_copy(hci_stack->decline_addr, addr); 2768 break; 2769 } 2770 2771 if (hci_stack->gap_classic_accept_callback != NULL){ 2772 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2773 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2774 bd_addr_copy(hci_stack->decline_addr, addr); 2775 break; 2776 } 2777 } 2778 2779 // TODO: eval COD 8-10 2780 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2781 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2782 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2783 if (!conn) { 2784 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2785 } 2786 if (!conn) { 2787 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2788 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2789 bd_addr_copy(hci_stack->decline_addr, addr); 2790 hci_run(); 2791 // avoid event to higher layer 2792 return; 2793 } 2794 conn->role = HCI_ROLE_SLAVE; 2795 conn->state = RECEIVED_CONNECTION_REQUEST; 2796 // store info about eSCO 2797 if (link_type == HCI_LINK_TYPE_ESCO){ 2798 conn->remote_supported_features[0] |= 1; 2799 } 2800 hci_run(); 2801 break; 2802 2803 case HCI_EVENT_CONNECTION_COMPLETE: 2804 // Connection management 2805 reverse_bd_addr(&packet[5], addr); 2806 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2807 addr_type = BD_ADDR_TYPE_ACL; 2808 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2809 if (conn) { 2810 if (!packet[2]){ 2811 conn->state = OPEN; 2812 conn->con_handle = little_endian_read_16(packet, 3); 2813 2814 // queue set supervision timeout if we're master 2815 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2816 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2817 } 2818 2819 // restart timer 2820 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2821 btstack_run_loop_add_timer(&conn->timeout); 2822 2823 // trigger remote features for dedicated bonding 2824 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2825 hci_trigger_remote_features_for_connection(conn); 2826 } 2827 2828 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2829 2830 hci_emit_nr_connections_changed(); 2831 } else { 2832 // connection failed 2833 hci_handle_connection_failed(conn, packet[2]); 2834 } 2835 } 2836 break; 2837 2838 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2839 reverse_bd_addr(&packet[5], addr); 2840 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2841 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2842 if (packet[2]){ 2843 // connection failed 2844 if (conn){ 2845 hci_handle_connection_failed(conn, packet[2]); 2846 } 2847 break; 2848 } 2849 if (!conn) { 2850 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2851 } 2852 if (!conn) { 2853 break; 2854 } 2855 conn->state = OPEN; 2856 conn->con_handle = little_endian_read_16(packet, 3); 2857 2858 #ifdef ENABLE_SCO_OVER_HCI 2859 // update SCO 2860 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2861 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2862 } 2863 // trigger can send now 2864 if (hci_have_usb_transport()){ 2865 hci_stack->sco_can_send_now = true; 2866 } 2867 #endif 2868 #ifdef HAVE_SCO_TRANSPORT 2869 // configure sco transport 2870 if (hci_stack->sco_transport != NULL){ 2871 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2872 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2873 } 2874 #endif 2875 break; 2876 2877 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2878 handle = little_endian_read_16(packet, 3); 2879 conn = hci_connection_for_handle(handle); 2880 if (!conn) break; 2881 if (!packet[2]){ 2882 const uint8_t * features = &packet[5]; 2883 hci_handle_remote_features_page_0(conn, features); 2884 2885 // read extended features if possible 2886 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2887 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2888 break; 2889 } 2890 } 2891 hci_handle_remote_features_received(conn); 2892 break; 2893 2894 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2895 handle = little_endian_read_16(packet, 3); 2896 conn = hci_connection_for_handle(handle); 2897 if (!conn) break; 2898 // status = ok, page = 1 2899 if (!packet[2]) { 2900 uint8_t page_number = packet[5]; 2901 uint8_t maximum_page_number = packet[6]; 2902 const uint8_t * features = &packet[7]; 2903 bool done = false; 2904 switch (page_number){ 2905 case 1: 2906 hci_handle_remote_features_page_1(conn, features); 2907 if (maximum_page_number >= 2){ 2908 // get Secure Connections (Controller) from Page 2 if available 2909 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2910 } else { 2911 // otherwise, assume SC (Controller) == SC (Host) 2912 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2913 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2914 } 2915 done = true; 2916 } 2917 break; 2918 case 2: 2919 hci_handle_remote_features_page_2(conn, features); 2920 done = true; 2921 break; 2922 default: 2923 break; 2924 } 2925 if (!done) break; 2926 } 2927 hci_handle_remote_features_received(conn); 2928 break; 2929 2930 case HCI_EVENT_LINK_KEY_REQUEST: 2931 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2932 hci_event_link_key_request_get_bd_addr(packet, addr); 2933 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2934 if (!conn) break; 2935 2936 // lookup link key in db if not cached 2937 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2938 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2939 } 2940 2941 // response sent by hci_run() 2942 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2943 #endif 2944 break; 2945 2946 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2947 hci_event_link_key_request_get_bd_addr(packet, addr); 2948 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2949 if (!conn) break; 2950 2951 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2952 2953 // CVE-2020-26555: ignore NULL link key 2954 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2955 if (btstack_is_null(&packet[8], 16)) break; 2956 2957 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2958 // Change Connection Encryption keeps link key type 2959 if (link_key_type != CHANGED_COMBINATION_KEY){ 2960 conn->link_key_type = link_key_type; 2961 } 2962 2963 // cache link key. link keys stored in little-endian format for legacy reasons 2964 memcpy(&conn->link_key, &packet[8], 16); 2965 2966 // only store link key: 2967 // - if bondable enabled 2968 if (hci_stack->bondable == false) break; 2969 // - if security level sufficient 2970 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2971 // - for SSP, also check if remote side requested bonding as well 2972 if (conn->link_key_type != COMBINATION_KEY){ 2973 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2974 if (!remote_bonding){ 2975 break; 2976 } 2977 } 2978 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2979 break; 2980 } 2981 2982 case HCI_EVENT_PIN_CODE_REQUEST: 2983 hci_event_pin_code_request_get_bd_addr(packet, addr); 2984 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2985 if (!conn) break; 2986 2987 hci_pairing_started(conn, false); 2988 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2989 if (!hci_stack->bondable ){ 2990 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2991 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2992 hci_run(); 2993 return; 2994 } 2995 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2996 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2997 log_info("Level 4 required, but SC not supported -> abort"); 2998 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2999 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3000 hci_run(); 3001 return; 3002 } 3003 break; 3004 3005 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3006 hci_event_io_capability_response_get_bd_addr(packet, addr); 3007 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3008 if (!conn) break; 3009 3010 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3011 hci_pairing_started(conn, true); 3012 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3013 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3014 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3015 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3016 #endif 3017 break; 3018 3019 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3020 hci_event_io_capability_response_get_bd_addr(packet, addr); 3021 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3022 if (!conn) break; 3023 3024 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3025 hci_connection_timestamp(conn); 3026 hci_pairing_started(conn, true); 3027 break; 3028 3029 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3030 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3031 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3032 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3033 if (!conn) break; 3034 3035 hci_connection_timestamp(conn); 3036 3037 hci_pairing_started(conn, true); 3038 3039 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3040 break; 3041 #endif 3042 3043 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3044 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3045 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3046 if (!conn) break; 3047 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3048 if (hci_stack->ssp_auto_accept){ 3049 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3050 }; 3051 } else { 3052 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3053 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3054 // don't forward event to app 3055 hci_run(); 3056 return; 3057 } 3058 break; 3059 3060 case HCI_EVENT_USER_PASSKEY_REQUEST: 3061 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3062 if (hci_stack->ssp_auto_accept){ 3063 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3064 }; 3065 break; 3066 3067 case HCI_EVENT_MODE_CHANGE: 3068 handle = hci_event_mode_change_get_handle(packet); 3069 conn = hci_connection_for_handle(handle); 3070 if (!conn) break; 3071 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3072 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3073 break; 3074 #endif 3075 3076 case HCI_EVENT_ENCRYPTION_CHANGE: 3077 handle = hci_event_encryption_change_get_connection_handle(packet); 3078 conn = hci_connection_for_handle(handle); 3079 if (!conn) break; 3080 if (hci_event_encryption_change_get_status(packet) == 0u) { 3081 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3082 if (encryption_enabled){ 3083 if (hci_is_le_connection(conn)){ 3084 // For LE, we accept connection as encrypted 3085 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3086 } 3087 #ifdef ENABLE_CLASSIC 3088 else { 3089 3090 // dedicated bonding: send result and disconnect 3091 if (conn->bonding_flags & BONDING_DEDICATED){ 3092 conn->bonding_flags &= ~BONDING_DEDICATED; 3093 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3094 conn->bonding_status = packet[2]; 3095 break; 3096 } 3097 3098 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3099 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3100 bool connected_uses_aes_ccm = encryption_enabled == 2; 3101 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3102 log_info("SC during pairing, but only E0 now -> abort"); 3103 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3104 break; 3105 } 3106 3107 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3108 if (connected_uses_aes_ccm){ 3109 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3110 } 3111 3112 #ifdef ENABLE_TESTING_SUPPORT 3113 // work around for issue with PTS dongle 3114 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3115 #endif 3116 3117 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3118 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3119 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3120 } else { 3121 // if not, pretend everything is perfect 3122 hci_handle_read_encryption_key_size_complete(conn, 16); 3123 } 3124 } 3125 #endif 3126 } else { 3127 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3128 } 3129 } 3130 3131 break; 3132 3133 #ifdef ENABLE_CLASSIC 3134 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3135 handle = hci_event_authentication_complete_get_connection_handle(packet); 3136 conn = hci_connection_for_handle(handle); 3137 if (!conn) break; 3138 3139 // clear authentication active flag 3140 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3141 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3142 3143 // authenticated only if auth status == 0 3144 if (hci_event_authentication_complete_get_status(packet) == 0){ 3145 // authenticated 3146 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3147 3148 // If not already encrypted, start encryption 3149 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3150 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3151 break; 3152 } 3153 } 3154 3155 // emit updated security level 3156 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3157 break; 3158 3159 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3160 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3161 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3162 if (!conn) break; 3163 3164 // treat successfully paired connection as authenticated 3165 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3166 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3167 } 3168 3169 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3170 break; 3171 #endif 3172 3173 // HCI_EVENT_DISCONNECTION_COMPLETE 3174 // has been split, to first notify stack before shutting connection down 3175 // see end of function, too. 3176 case HCI_EVENT_DISCONNECTION_COMPLETE: 3177 if (packet[2]) break; // status != 0 3178 handle = little_endian_read_16(packet, 3); 3179 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3180 if (hci_stack->acl_fragmentation_total_size > 0u) { 3181 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3182 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3183 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3184 hci_stack->acl_fragmentation_total_size = 0; 3185 hci_stack->acl_fragmentation_pos = 0; 3186 if (release_buffer){ 3187 hci_release_packet_buffer(); 3188 } 3189 } 3190 } 3191 3192 conn = hci_connection_for_handle(handle); 3193 if (!conn) break; 3194 #ifdef ENABLE_CLASSIC 3195 // pairing failed if it was ongoing 3196 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3197 #endif 3198 3199 // emit dedicatd bonding event 3200 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3201 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3202 } 3203 3204 // mark connection for shutdown, stop timers, reset state 3205 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3206 hci_connection_stop_timer(conn); 3207 hci_connection_init(conn); 3208 3209 #ifdef ENABLE_BLE 3210 #ifdef ENABLE_LE_PERIPHERAL 3211 // re-enable advertisements for le connections if active 3212 if (hci_is_le_connection(conn)){ 3213 hci_update_advertisements_enabled_for_current_roles(); 3214 } 3215 #endif 3216 #endif 3217 break; 3218 3219 case HCI_EVENT_HARDWARE_ERROR: 3220 log_error("Hardware Error: 0x%02x", packet[2]); 3221 if (hci_stack->hardware_error_callback){ 3222 (*hci_stack->hardware_error_callback)(packet[2]); 3223 } else { 3224 // if no special requests, just reboot stack 3225 hci_power_control_off(); 3226 hci_power_control_on(); 3227 } 3228 break; 3229 3230 #ifdef ENABLE_CLASSIC 3231 case HCI_EVENT_ROLE_CHANGE: 3232 if (packet[2]) break; // status != 0 3233 reverse_bd_addr(&packet[3], addr); 3234 addr_type = BD_ADDR_TYPE_ACL; 3235 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3236 if (!conn) break; 3237 conn->role = packet[9]; 3238 break; 3239 #endif 3240 3241 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3242 // release packet buffer only for asynchronous transport and if there are not further fragements 3243 if (hci_transport_synchronous()) { 3244 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3245 return; // instead of break: to avoid re-entering hci_run() 3246 } 3247 hci_stack->acl_fragmentation_tx_active = 0; 3248 if (hci_stack->acl_fragmentation_total_size) break; 3249 hci_release_packet_buffer(); 3250 3251 // L2CAP receives this event via the hci_emit_event below 3252 3253 #ifdef ENABLE_CLASSIC 3254 // For SCO, we do the can_send_now_check here 3255 hci_notify_if_sco_can_send_now(); 3256 #endif 3257 break; 3258 3259 #ifdef ENABLE_CLASSIC 3260 case HCI_EVENT_SCO_CAN_SEND_NOW: 3261 // For SCO, we do the can_send_now_check here 3262 hci_stack->sco_can_send_now = true; 3263 hci_notify_if_sco_can_send_now(); 3264 return; 3265 3266 // explode inquriy results for easier consumption 3267 case HCI_EVENT_INQUIRY_RESULT: 3268 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3269 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3270 gap_inquiry_explode(packet, size); 3271 break; 3272 #endif 3273 3274 #ifdef ENABLE_BLE 3275 case HCI_EVENT_LE_META: 3276 switch (packet[2]){ 3277 #ifdef ENABLE_LE_CENTRAL 3278 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3279 // log_info("advertising report received"); 3280 if (!hci_stack->le_scanning_enabled) break; 3281 le_handle_advertisement_report(packet, size); 3282 break; 3283 #endif 3284 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3285 event_handle_le_connection_complete(packet); 3286 break; 3287 3288 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3289 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3290 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3291 conn = hci_connection_for_handle(handle); 3292 if (!conn) break; 3293 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3294 break; 3295 3296 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3297 // connection 3298 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3299 conn = hci_connection_for_handle(handle); 3300 if (conn) { 3301 // read arguments 3302 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3303 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3304 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3305 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3306 3307 // validate against current connection parameter range 3308 le_connection_parameter_range_t existing_range; 3309 gap_get_connection_parameter_range(&existing_range); 3310 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3311 if (update_parameter){ 3312 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3313 conn->le_conn_interval_min = le_conn_interval_min; 3314 conn->le_conn_interval_max = le_conn_interval_max; 3315 conn->le_conn_latency = le_conn_latency; 3316 conn->le_supervision_timeout = le_supervision_timeout; 3317 } else { 3318 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3319 } 3320 } 3321 break; 3322 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3323 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3324 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3325 conn = hci_connection_for_handle(handle); 3326 if (conn) { 3327 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3328 } 3329 break; 3330 #endif 3331 default: 3332 break; 3333 } 3334 break; 3335 #endif 3336 case HCI_EVENT_VENDOR_SPECIFIC: 3337 // Vendor specific commands often create vendor specific event instead of num completed packets 3338 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3339 switch (hci_stack->manufacturer){ 3340 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3341 hci_stack->num_cmd_packets = 1; 3342 break; 3343 default: 3344 break; 3345 } 3346 break; 3347 default: 3348 break; 3349 } 3350 3351 handle_event_for_current_stack_state(packet, size); 3352 3353 // notify upper stack 3354 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3355 3356 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3357 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3358 handle = little_endian_read_16(packet, 3); 3359 hci_connection_t * aConn = hci_connection_for_handle(handle); 3360 // discard connection if app did not trigger a reconnect in the event handler 3361 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3362 hci_shutdown_connection(aConn); 3363 } 3364 } 3365 3366 // execute main loop 3367 hci_run(); 3368 } 3369 3370 #ifdef ENABLE_CLASSIC 3371 3372 #ifdef ENABLE_SCO_OVER_HCI 3373 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3374 static void sco_schedule_tx(hci_connection_t * conn); 3375 3376 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3377 log_debug("SCO TX Timeout"); 3378 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3379 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3380 if (!conn) return; 3381 3382 // trigger send 3383 conn->sco_tx_ready = 1; 3384 // extra packet if CVSD but SCO buffer is too short 3385 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3386 conn->sco_tx_ready++; 3387 } 3388 hci_notify_if_sco_can_send_now(); 3389 } 3390 3391 3392 #define SCO_TX_AFTER_RX_MS (6) 3393 3394 static void sco_schedule_tx(hci_connection_t * conn){ 3395 3396 uint32_t now = btstack_run_loop_get_time_ms(); 3397 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3398 int time_delta_ms = sco_tx_ms - now; 3399 3400 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3401 3402 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3403 btstack_run_loop_remove_timer(timer); 3404 btstack_run_loop_set_timer(timer, time_delta_ms); 3405 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3406 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3407 btstack_run_loop_add_timer(timer); 3408 } 3409 #endif 3410 3411 static void sco_handler(uint8_t * packet, uint16_t size){ 3412 // lookup connection struct 3413 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3414 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3415 if (!conn) return; 3416 3417 #ifdef ENABLE_SCO_OVER_HCI 3418 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3419 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3420 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3421 packet[2] = 0x3c; 3422 memmove(&packet[3], &packet[23], 63); 3423 size = 63; 3424 } 3425 } 3426 3427 if (hci_have_usb_transport()){ 3428 // Nothing to do 3429 } else { 3430 // 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); 3431 if (hci_stack->synchronous_flow_control_enabled == 0){ 3432 uint32_t now = btstack_run_loop_get_time_ms(); 3433 3434 if (!conn->sco_rx_valid){ 3435 // ignore first 10 packets 3436 conn->sco_rx_count++; 3437 // log_debug("sco rx count %u", conn->sco_rx_count); 3438 if (conn->sco_rx_count == 10) { 3439 // use first timestamp as is and pretent it just started 3440 conn->sco_rx_ms = now; 3441 conn->sco_rx_valid = 1; 3442 conn->sco_rx_count = 0; 3443 sco_schedule_tx(conn); 3444 } 3445 } else { 3446 // track expected arrival timme 3447 conn->sco_rx_count++; 3448 conn->sco_rx_ms += 7; 3449 int delta = (int32_t) (now - conn->sco_rx_ms); 3450 if (delta > 0){ 3451 conn->sco_rx_ms++; 3452 } 3453 // log_debug("sco rx %u", conn->sco_rx_ms); 3454 sco_schedule_tx(conn); 3455 } 3456 } 3457 } 3458 #endif 3459 3460 // deliver to app 3461 if (hci_stack->sco_packet_handler) { 3462 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3463 } 3464 3465 #ifdef HAVE_SCO_TRANSPORT 3466 // We can send one packet for each received packet 3467 conn->sco_tx_ready++; 3468 hci_notify_if_sco_can_send_now(); 3469 #endif 3470 3471 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3472 conn->num_packets_completed++; 3473 hci_stack->host_completed_packets = 1; 3474 hci_run(); 3475 #endif 3476 } 3477 #endif 3478 3479 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3480 hci_dump_packet(packet_type, 1, packet, size); 3481 switch (packet_type) { 3482 case HCI_EVENT_PACKET: 3483 event_handler(packet, size); 3484 break; 3485 case HCI_ACL_DATA_PACKET: 3486 acl_handler(packet, size); 3487 break; 3488 #ifdef ENABLE_CLASSIC 3489 case HCI_SCO_DATA_PACKET: 3490 sco_handler(packet, size); 3491 break; 3492 #endif 3493 default: 3494 break; 3495 } 3496 } 3497 3498 /** 3499 * @brief Add event packet handler. 3500 */ 3501 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3502 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3503 } 3504 3505 /** 3506 * @brief Remove event packet handler. 3507 */ 3508 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3509 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3510 } 3511 3512 /** Register HCI packet handlers */ 3513 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3514 hci_stack->acl_packet_handler = handler; 3515 } 3516 3517 #ifdef ENABLE_CLASSIC 3518 /** 3519 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3520 */ 3521 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3522 hci_stack->sco_packet_handler = handler; 3523 } 3524 #endif 3525 3526 static void hci_state_reset(void){ 3527 // no connections yet 3528 hci_stack->connections = NULL; 3529 3530 // keep discoverable/connectable as this has been requested by the client(s) 3531 // hci_stack->discoverable = 0; 3532 // hci_stack->connectable = 0; 3533 // hci_stack->bondable = 1; 3534 // hci_stack->own_addr_type = 0; 3535 3536 // buffer is free 3537 hci_stack->hci_packet_buffer_reserved = false; 3538 3539 // no pending cmds 3540 hci_stack->decline_reason = 0; 3541 3542 hci_stack->secure_connections_active = false; 3543 3544 #ifdef ENABLE_CLASSIC 3545 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3546 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3547 3548 hci_stack->gap_tasks_classic = 3549 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3550 GAP_TASK_SET_CLASS_OF_DEVICE | 3551 GAP_TASK_SET_LOCAL_NAME | 3552 GAP_TASK_SET_EIR_DATA | 3553 GAP_TASK_WRITE_SCAN_ENABLE | 3554 GAP_TASK_WRITE_PAGE_TIMEOUT; 3555 #endif 3556 3557 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3558 hci_stack->classic_read_local_oob_data = false; 3559 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3560 #endif 3561 3562 // LE 3563 #ifdef ENABLE_BLE 3564 memset(hci_stack->le_random_address, 0, 6); 3565 hci_stack->le_random_address_set = 0; 3566 #endif 3567 #ifdef ENABLE_LE_CENTRAL 3568 hci_stack->le_scanning_active = false; 3569 hci_stack->le_scanning_param_update = true; 3570 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3571 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3572 hci_stack->le_whitelist_capacity = 0; 3573 #endif 3574 #ifdef ENABLE_LE_PERIPHERAL 3575 hci_stack->le_advertisements_active = false; 3576 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3577 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3578 } 3579 if (hci_stack->le_advertisements_data != NULL){ 3580 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3581 } 3582 #endif 3583 } 3584 3585 #ifdef ENABLE_CLASSIC 3586 /** 3587 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3588 */ 3589 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3590 // store and open remote device db 3591 hci_stack->link_key_db = link_key_db; 3592 if (hci_stack->link_key_db) { 3593 hci_stack->link_key_db->open(); 3594 } 3595 } 3596 #endif 3597 3598 void hci_init(const hci_transport_t *transport, const void *config){ 3599 3600 #ifdef HAVE_MALLOC 3601 if (!hci_stack) { 3602 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3603 } 3604 #else 3605 hci_stack = &hci_stack_static; 3606 #endif 3607 memset(hci_stack, 0, sizeof(hci_stack_t)); 3608 3609 // reference to use transport layer implementation 3610 hci_stack->hci_transport = transport; 3611 3612 // reference to used config 3613 hci_stack->config = config; 3614 3615 // setup pointer for outgoing packet buffer 3616 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3617 3618 // max acl payload size defined in config.h 3619 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3620 3621 // register packet handlers with transport 3622 transport->register_packet_handler(&packet_handler); 3623 3624 hci_stack->state = HCI_STATE_OFF; 3625 3626 // class of device 3627 hci_stack->class_of_device = 0x007a020c; // Smartphone 3628 3629 // bondable by default 3630 hci_stack->bondable = 1; 3631 3632 #ifdef ENABLE_CLASSIC 3633 // classic name 3634 hci_stack->local_name = default_classic_name; 3635 3636 // Master slave policy 3637 hci_stack->master_slave_policy = 1; 3638 3639 // Allow Role Switch 3640 hci_stack->allow_role_switch = 1; 3641 3642 // Default / minimum security level = 2 3643 hci_stack->gap_security_level = LEVEL_2; 3644 3645 // Default Security Mode 4 3646 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3647 3648 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3649 hci_stack->gap_required_encyrption_key_size = 7; 3650 3651 // Link Supervision Timeout 3652 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3653 3654 #endif 3655 3656 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3657 hci_stack->ssp_enable = 1; 3658 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3659 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3660 hci_stack->ssp_auto_accept = 1; 3661 3662 // Secure Connections: enable (requires support from Controller) 3663 hci_stack->secure_connections_enable = true; 3664 3665 // voice setting - signed 16 bit pcm data with CVSD over the air 3666 hci_stack->sco_voice_setting = 0x60; 3667 3668 #ifdef ENABLE_LE_CENTRAL 3669 // connection parameter to use for outgoing connections 3670 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3671 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3672 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3673 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3674 hci_stack->le_connection_latency = 4; // 4 3675 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3676 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3677 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3678 3679 // default LE Scanning 3680 hci_stack->le_scan_type = 0x1; // active 3681 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3682 hci_stack->le_scan_window = 0x30; // 30 ms 3683 #endif 3684 3685 #ifdef ENABLE_LE_PERIPHERAL 3686 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3687 #endif 3688 3689 // connection parameter range used to answer connection parameter update requests in l2cap 3690 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3691 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3692 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3693 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3694 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3695 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3696 3697 hci_state_reset(); 3698 } 3699 3700 void hci_deinit(void){ 3701 #ifdef HAVE_MALLOC 3702 if (hci_stack) { 3703 free(hci_stack); 3704 } 3705 #endif 3706 hci_stack = NULL; 3707 3708 #ifdef ENABLE_CLASSIC 3709 disable_l2cap_timeouts = 0; 3710 #endif 3711 } 3712 3713 /** 3714 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3715 */ 3716 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3717 hci_stack->chipset = chipset_driver; 3718 3719 // reset chipset driver - init is also called on power_up 3720 if (hci_stack->chipset && hci_stack->chipset->init){ 3721 hci_stack->chipset->init(hci_stack->config); 3722 } 3723 } 3724 3725 /** 3726 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3727 */ 3728 void hci_set_control(const btstack_control_t *hardware_control){ 3729 // references to used control implementation 3730 hci_stack->control = hardware_control; 3731 // init with transport config 3732 hardware_control->init(hci_stack->config); 3733 } 3734 3735 static void hci_discard_connections(void){ 3736 btstack_linked_list_iterator_t lit; 3737 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3738 while (btstack_linked_list_iterator_has_next(&lit)){ 3739 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3740 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3741 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3742 hci_shutdown_connection(connection); 3743 } 3744 } 3745 3746 void hci_close(void){ 3747 3748 #ifdef ENABLE_CLASSIC 3749 // close remote device db 3750 if (hci_stack->link_key_db) { 3751 hci_stack->link_key_db->close(); 3752 } 3753 #endif 3754 3755 hci_discard_connections(); 3756 3757 hci_power_control(HCI_POWER_OFF); 3758 3759 #ifdef HAVE_MALLOC 3760 free(hci_stack); 3761 #endif 3762 hci_stack = NULL; 3763 } 3764 3765 #ifdef HAVE_SCO_TRANSPORT 3766 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3767 hci_stack->sco_transport = sco_transport; 3768 sco_transport->register_packet_handler(&packet_handler); 3769 } 3770 #endif 3771 3772 #ifdef ENABLE_CLASSIC 3773 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3774 // validate ranage and set 3775 if (encryption_key_size < 7) return; 3776 if (encryption_key_size > 16) return; 3777 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3778 } 3779 3780 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3781 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3782 hci_stack->gap_security_mode = security_mode; 3783 return ERROR_CODE_SUCCESS; 3784 } else { 3785 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3786 } 3787 } 3788 3789 gap_security_mode_t gap_get_security_mode(void){ 3790 return hci_stack->gap_security_mode; 3791 } 3792 3793 void gap_set_security_level(gap_security_level_t security_level){ 3794 hci_stack->gap_security_level = security_level; 3795 } 3796 3797 gap_security_level_t gap_get_security_level(void){ 3798 if (hci_stack->gap_secure_connections_only_mode){ 3799 return LEVEL_4; 3800 } 3801 return hci_stack->gap_security_level; 3802 } 3803 3804 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3805 hci_stack->gap_minimal_service_security_level = security_level; 3806 } 3807 3808 void gap_set_secure_connections_only_mode(bool enable){ 3809 hci_stack->gap_secure_connections_only_mode = enable; 3810 } 3811 3812 bool gap_get_secure_connections_only_mode(void){ 3813 return hci_stack->gap_secure_connections_only_mode; 3814 } 3815 #endif 3816 3817 #ifdef ENABLE_CLASSIC 3818 void gap_set_class_of_device(uint32_t class_of_device){ 3819 hci_stack->class_of_device = class_of_device; 3820 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3821 hci_run(); 3822 } 3823 3824 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3825 hci_stack->default_link_policy_settings = default_link_policy_settings; 3826 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3827 hci_run(); 3828 } 3829 3830 void gap_set_allow_role_switch(bool allow_role_switch){ 3831 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3832 } 3833 3834 uint8_t hci_get_allow_role_switch(void){ 3835 return hci_stack->allow_role_switch; 3836 } 3837 3838 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3839 hci_stack->link_supervision_timeout = link_supervision_timeout; 3840 } 3841 3842 void hci_disable_l2cap_timeout_check(void){ 3843 disable_l2cap_timeouts = 1; 3844 } 3845 #endif 3846 3847 #ifndef HAVE_HOST_CONTROLLER_API 3848 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3849 void hci_set_bd_addr(bd_addr_t addr){ 3850 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3851 hci_stack->custom_bd_addr_set = 1; 3852 } 3853 #endif 3854 3855 // State-Module-Driver overview 3856 // state module low-level 3857 // HCI_STATE_OFF off close 3858 // HCI_STATE_INITIALIZING, on open 3859 // HCI_STATE_WORKING, on open 3860 // HCI_STATE_HALTING, on open 3861 // HCI_STATE_SLEEPING, off/sleep close 3862 // HCI_STATE_FALLING_ASLEEP on open 3863 3864 static int hci_power_control_on(void){ 3865 3866 // power on 3867 int err = 0; 3868 if (hci_stack->control && hci_stack->control->on){ 3869 err = (*hci_stack->control->on)(); 3870 } 3871 if (err){ 3872 log_error( "POWER_ON failed"); 3873 hci_emit_hci_open_failed(); 3874 return err; 3875 } 3876 3877 // int chipset driver 3878 if (hci_stack->chipset && hci_stack->chipset->init){ 3879 hci_stack->chipset->init(hci_stack->config); 3880 } 3881 3882 // init transport 3883 if (hci_stack->hci_transport->init){ 3884 hci_stack->hci_transport->init(hci_stack->config); 3885 } 3886 3887 // open transport 3888 err = hci_stack->hci_transport->open(); 3889 if (err){ 3890 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3891 if (hci_stack->control && hci_stack->control->off){ 3892 (*hci_stack->control->off)(); 3893 } 3894 hci_emit_hci_open_failed(); 3895 return err; 3896 } 3897 return 0; 3898 } 3899 3900 static void hci_power_control_off(void){ 3901 3902 log_info("hci_power_control_off"); 3903 3904 // close low-level device 3905 hci_stack->hci_transport->close(); 3906 3907 log_info("hci_power_control_off - hci_transport closed"); 3908 3909 // power off 3910 if (hci_stack->control && hci_stack->control->off){ 3911 (*hci_stack->control->off)(); 3912 } 3913 3914 log_info("hci_power_control_off - control closed"); 3915 3916 hci_stack->state = HCI_STATE_OFF; 3917 } 3918 3919 static void hci_power_control_sleep(void){ 3920 3921 log_info("hci_power_control_sleep"); 3922 3923 #if 0 3924 // don't close serial port during sleep 3925 3926 // close low-level device 3927 hci_stack->hci_transport->close(hci_stack->config); 3928 #endif 3929 3930 // sleep mode 3931 if (hci_stack->control && hci_stack->control->sleep){ 3932 (*hci_stack->control->sleep)(); 3933 } 3934 3935 hci_stack->state = HCI_STATE_SLEEPING; 3936 } 3937 3938 static int hci_power_control_wake(void){ 3939 3940 log_info("hci_power_control_wake"); 3941 3942 // wake on 3943 if (hci_stack->control && hci_stack->control->wake){ 3944 (*hci_stack->control->wake)(); 3945 } 3946 3947 #if 0 3948 // open low-level device 3949 int err = hci_stack->hci_transport->open(hci_stack->config); 3950 if (err){ 3951 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3952 if (hci_stack->control && hci_stack->control->off){ 3953 (*hci_stack->control->off)(); 3954 } 3955 hci_emit_hci_open_failed(); 3956 return err; 3957 } 3958 #endif 3959 3960 return 0; 3961 } 3962 3963 static void hci_power_transition_to_initializing(void){ 3964 // set up state machine 3965 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3966 hci_stack->hci_packet_buffer_reserved = false; 3967 hci_stack->state = HCI_STATE_INITIALIZING; 3968 hci_stack->substate = HCI_INIT_SEND_RESET; 3969 } 3970 3971 // returns error 3972 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3973 int err; 3974 switch (power_mode){ 3975 case HCI_POWER_ON: 3976 err = hci_power_control_on(); 3977 if (err != 0) { 3978 log_error("hci_power_control_on() error %d", err); 3979 return err; 3980 } 3981 hci_power_transition_to_initializing(); 3982 break; 3983 case HCI_POWER_OFF: 3984 // do nothing 3985 break; 3986 case HCI_POWER_SLEEP: 3987 // do nothing (with SLEEP == OFF) 3988 break; 3989 default: 3990 btstack_assert(false); 3991 break; 3992 } 3993 return ERROR_CODE_SUCCESS; 3994 } 3995 3996 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3997 switch (power_mode){ 3998 case HCI_POWER_ON: 3999 // do nothing 4000 break; 4001 case HCI_POWER_OFF: 4002 // no connections yet, just turn it off 4003 hci_power_control_off(); 4004 break; 4005 case HCI_POWER_SLEEP: 4006 // no connections yet, just turn it off 4007 hci_power_control_sleep(); 4008 break; 4009 default: 4010 btstack_assert(false); 4011 break; 4012 } 4013 return ERROR_CODE_SUCCESS; 4014 } 4015 4016 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4017 switch (power_mode){ 4018 case HCI_POWER_ON: 4019 // do nothing 4020 break; 4021 case HCI_POWER_OFF: 4022 // see hci_run 4023 hci_stack->state = HCI_STATE_HALTING; 4024 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4025 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4026 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4027 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4028 btstack_run_loop_add_timer(&hci_stack->timeout); 4029 break; 4030 case HCI_POWER_SLEEP: 4031 // see hci_run 4032 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4033 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4034 break; 4035 default: 4036 btstack_assert(false); 4037 break; 4038 } 4039 return ERROR_CODE_SUCCESS; 4040 } 4041 4042 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4043 switch (power_mode){ 4044 case HCI_POWER_ON: 4045 hci_power_transition_to_initializing(); 4046 break; 4047 case HCI_POWER_OFF: 4048 // do nothing 4049 break; 4050 case HCI_POWER_SLEEP: 4051 // see hci_run 4052 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4053 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4054 break; 4055 default: 4056 btstack_assert(false); 4057 break; 4058 } 4059 return ERROR_CODE_SUCCESS; 4060 } 4061 4062 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4063 switch (power_mode){ 4064 case HCI_POWER_ON: 4065 hci_power_transition_to_initializing(); 4066 break; 4067 case HCI_POWER_OFF: 4068 // see hci_run 4069 hci_stack->state = HCI_STATE_HALTING; 4070 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4071 break; 4072 case HCI_POWER_SLEEP: 4073 // do nothing 4074 break; 4075 default: 4076 btstack_assert(false); 4077 break; 4078 } 4079 return ERROR_CODE_SUCCESS; 4080 } 4081 4082 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4083 int err; 4084 switch (power_mode){ 4085 case HCI_POWER_ON: 4086 err = hci_power_control_wake(); 4087 if (err) return err; 4088 hci_power_transition_to_initializing(); 4089 break; 4090 case HCI_POWER_OFF: 4091 hci_stack->state = HCI_STATE_HALTING; 4092 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4093 break; 4094 case HCI_POWER_SLEEP: 4095 // do nothing 4096 break; 4097 default: 4098 btstack_assert(false); 4099 break; 4100 } 4101 return ERROR_CODE_SUCCESS; 4102 } 4103 4104 int hci_power_control(HCI_POWER_MODE power_mode){ 4105 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4106 int err = 0; 4107 switch (hci_stack->state){ 4108 case HCI_STATE_OFF: 4109 err = hci_power_control_state_off(power_mode); 4110 break; 4111 case HCI_STATE_INITIALIZING: 4112 err = hci_power_control_state_initializing(power_mode); 4113 break; 4114 case HCI_STATE_WORKING: 4115 err = hci_power_control_state_working(power_mode); 4116 break; 4117 case HCI_STATE_HALTING: 4118 err = hci_power_control_state_halting(power_mode); 4119 break; 4120 case HCI_STATE_FALLING_ASLEEP: 4121 err = hci_power_control_state_falling_asleep(power_mode); 4122 break; 4123 case HCI_STATE_SLEEPING: 4124 err = hci_power_control_state_sleeping(power_mode); 4125 break; 4126 default: 4127 btstack_assert(false); 4128 break; 4129 } 4130 if (err != 0){ 4131 return err; 4132 } 4133 4134 // create internal event 4135 hci_emit_state(); 4136 4137 // trigger next/first action 4138 hci_run(); 4139 4140 return 0; 4141 } 4142 4143 4144 static void hci_halting_run(void) { 4145 4146 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4147 4148 hci_connection_t *connection; 4149 4150 switch (hci_stack->substate) { 4151 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4152 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4153 4154 #ifdef ENABLE_BLE 4155 #ifdef ENABLE_LE_CENTRAL 4156 hci_whitelist_free(); 4157 #endif 4158 #endif 4159 // close all open connections 4160 connection = (hci_connection_t *) hci_stack->connections; 4161 if (connection) { 4162 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4163 if (!hci_can_send_command_packet_now()) return; 4164 4165 // check state 4166 if (connection->state == SENT_DISCONNECT) return; 4167 connection->state = SENT_DISCONNECT; 4168 4169 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4170 4171 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4172 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4173 4174 // ... which would be ignored anyway as we shutdown (free) the connection now 4175 hci_shutdown_connection(connection); 4176 4177 // finally, send the disconnect command 4178 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4179 return; 4180 } 4181 4182 btstack_run_loop_remove_timer(&hci_stack->timeout); 4183 4184 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4185 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4186 log_info("HCI_STATE_HALTING: wait 50 ms"); 4187 hci_stack->substate = HCI_HALTING_W4_TIMER; 4188 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4189 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4190 btstack_run_loop_add_timer(&hci_stack->timeout); 4191 break; 4192 } 4193 4194 /* fall through */ 4195 4196 case HCI_HALTING_CLOSE: 4197 // close left over connections (that had not been properly closed before) 4198 hci_discard_connections(); 4199 4200 log_info("HCI_STATE_HALTING, calling off"); 4201 4202 // switch mode 4203 hci_power_control_off(); 4204 4205 log_info("HCI_STATE_HALTING, emitting state"); 4206 hci_emit_state(); 4207 log_info("HCI_STATE_HALTING, done"); 4208 break; 4209 4210 case HCI_HALTING_W4_TIMER: 4211 // keep waiting 4212 4213 break; 4214 default: 4215 break; 4216 } 4217 }; 4218 4219 static void hci_falling_asleep_run(void){ 4220 hci_connection_t * connection; 4221 switch(hci_stack->substate) { 4222 case HCI_FALLING_ASLEEP_DISCONNECT: 4223 log_info("HCI_STATE_FALLING_ASLEEP"); 4224 // close all open connections 4225 connection = (hci_connection_t *) hci_stack->connections; 4226 if (connection){ 4227 4228 // send disconnect 4229 if (!hci_can_send_command_packet_now()) return; 4230 4231 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4232 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4233 4234 // send disconnected event right away - causes higher layer connections to get closed, too. 4235 hci_shutdown_connection(connection); 4236 return; 4237 } 4238 4239 if (hci_classic_supported()){ 4240 // disable page and inquiry scan 4241 if (!hci_can_send_command_packet_now()) return; 4242 4243 log_info("HCI_STATE_HALTING, disabling inq scans"); 4244 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4245 4246 // continue in next sub state 4247 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4248 break; 4249 } 4250 4251 /* fall through */ 4252 4253 case HCI_FALLING_ASLEEP_COMPLETE: 4254 log_info("HCI_STATE_HALTING, calling sleep"); 4255 // switch mode 4256 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4257 hci_emit_state(); 4258 break; 4259 4260 default: 4261 break; 4262 } 4263 } 4264 4265 #ifdef ENABLE_CLASSIC 4266 4267 static void hci_update_scan_enable(void){ 4268 // 2 = page scan, 1 = inq scan 4269 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4270 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4271 hci_run(); 4272 } 4273 4274 void gap_discoverable_control(uint8_t enable){ 4275 if (enable) enable = 1; // normalize argument 4276 4277 if (hci_stack->discoverable == enable){ 4278 hci_emit_discoverable_enabled(hci_stack->discoverable); 4279 return; 4280 } 4281 4282 hci_stack->discoverable = enable; 4283 hci_update_scan_enable(); 4284 } 4285 4286 void gap_connectable_control(uint8_t enable){ 4287 if (enable) enable = 1; // normalize argument 4288 4289 // don't emit event 4290 if (hci_stack->connectable == enable) return; 4291 4292 hci_stack->connectable = enable; 4293 hci_update_scan_enable(); 4294 } 4295 #endif 4296 4297 void gap_local_bd_addr(bd_addr_t address_buffer){ 4298 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4299 } 4300 4301 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4302 static void hci_host_num_completed_packets(void){ 4303 4304 // create packet manually as arrays are not supported and num_commands should not get reduced 4305 hci_reserve_packet_buffer(); 4306 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4307 4308 uint16_t size = 0; 4309 uint16_t num_handles = 0; 4310 packet[size++] = 0x35; 4311 packet[size++] = 0x0c; 4312 size++; // skip param len 4313 size++; // skip num handles 4314 4315 // add { handle, packets } entries 4316 btstack_linked_item_t * it; 4317 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4318 hci_connection_t * connection = (hci_connection_t *) it; 4319 if (connection->num_packets_completed){ 4320 little_endian_store_16(packet, size, connection->con_handle); 4321 size += 2; 4322 little_endian_store_16(packet, size, connection->num_packets_completed); 4323 size += 2; 4324 // 4325 num_handles++; 4326 connection->num_packets_completed = 0; 4327 } 4328 } 4329 4330 packet[2] = size - 3; 4331 packet[3] = num_handles; 4332 4333 hci_stack->host_completed_packets = 0; 4334 4335 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4336 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4337 4338 // release packet buffer for synchronous transport implementations 4339 if (hci_transport_synchronous()){ 4340 hci_release_packet_buffer(); 4341 hci_emit_transport_packet_sent(); 4342 } 4343 } 4344 #endif 4345 4346 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4347 UNUSED(ds); 4348 hci_stack->substate = HCI_HALTING_CLOSE; 4349 // allow packet handlers to defer final shutdown 4350 hci_emit_state(); 4351 hci_run(); 4352 } 4353 4354 static bool hci_run_acl_fragments(void){ 4355 if (hci_stack->acl_fragmentation_total_size > 0u) { 4356 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4357 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4358 if (connection) { 4359 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4360 hci_send_acl_packet_fragments(connection); 4361 return true; 4362 } 4363 } else { 4364 // connection gone -> discard further fragments 4365 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4366 hci_stack->acl_fragmentation_total_size = 0; 4367 hci_stack->acl_fragmentation_pos = 0; 4368 } 4369 } 4370 return false; 4371 } 4372 4373 #ifdef ENABLE_CLASSIC 4374 static bool hci_run_general_gap_classic(void){ 4375 4376 // assert stack is working and classic is active 4377 if (hci_classic_supported() == false) return false; 4378 if (hci_stack->state != HCI_STATE_WORKING) return false; 4379 4380 // decline incoming connections 4381 if (hci_stack->decline_reason){ 4382 uint8_t reason = hci_stack->decline_reason; 4383 hci_stack->decline_reason = 0; 4384 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4385 return true; 4386 } 4387 4388 if (hci_stack->gap_tasks_classic != 0){ 4389 hci_run_gap_tasks_classic(); 4390 return true; 4391 } 4392 4393 // start/stop inquiry 4394 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4395 uint8_t duration = hci_stack->inquiry_state; 4396 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4397 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4398 return true; 4399 } 4400 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4401 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4402 hci_send_cmd(&hci_inquiry_cancel); 4403 return true; 4404 } 4405 // remote name request 4406 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4407 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4408 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4409 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4410 return true; 4411 } 4412 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4413 // Local OOB data 4414 if (hci_stack->classic_read_local_oob_data){ 4415 hci_stack->classic_read_local_oob_data = false; 4416 if (hci_stack->local_supported_commands[1] & 0x10u){ 4417 hci_send_cmd(&hci_read_local_extended_oob_data); 4418 } else { 4419 hci_send_cmd(&hci_read_local_oob_data); 4420 } 4421 } 4422 #endif 4423 // pairing 4424 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4425 uint8_t state = hci_stack->gap_pairing_state; 4426 uint8_t pin_code[16]; 4427 switch (state){ 4428 case GAP_PAIRING_STATE_SEND_PIN: 4429 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4430 memset(pin_code, 0, 16); 4431 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4432 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4433 break; 4434 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4435 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4436 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4437 break; 4438 case GAP_PAIRING_STATE_SEND_PASSKEY: 4439 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4440 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4441 break; 4442 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4443 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4444 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4445 break; 4446 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4447 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4448 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4449 break; 4450 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4451 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4452 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4453 break; 4454 default: 4455 break; 4456 } 4457 return true; 4458 } 4459 return false; 4460 } 4461 #endif 4462 4463 #ifdef ENABLE_BLE 4464 static bool hci_run_general_gap_le(void){ 4465 4466 // Phase 1: collect what to stop 4467 4468 bool scanning_stop = false; 4469 bool connecting_stop = false; 4470 bool advertising_stop = false; 4471 4472 #ifndef ENABLE_LE_CENTRAL 4473 UNUSED(scanning_stop); 4474 UNUSED(connecting_stop); 4475 #endif 4476 #ifndef ENABLE_LE_PERIPHERAL 4477 UNUSED(advertising_stop); 4478 #endif 4479 4480 // check if own address changes 4481 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4482 4483 // check if whitelist needs modification 4484 bool whitelist_modification_pending = false; 4485 btstack_linked_list_iterator_t lit; 4486 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4487 while (btstack_linked_list_iterator_has_next(&lit)){ 4488 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4489 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4490 whitelist_modification_pending = true; 4491 break; 4492 } 4493 } 4494 // check if resolving list needs modification 4495 bool resolving_list_modification_pending = false; 4496 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4497 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4498 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4499 resolving_list_modification_pending = true; 4500 } 4501 #endif 4502 4503 #ifdef ENABLE_LE_CENTRAL 4504 // scanning control 4505 if (hci_stack->le_scanning_active) { 4506 // stop if: 4507 // - parameter change required 4508 // - it's disabled 4509 // - whitelist change required but used for scanning 4510 // - resolving list modified 4511 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4512 if ((hci_stack->le_scanning_param_update) || 4513 !hci_stack->le_scanning_enabled || 4514 scanning_uses_whitelist || 4515 resolving_list_modification_pending){ 4516 4517 scanning_stop = true; 4518 } 4519 } 4520 #endif 4521 4522 #ifdef ENABLE_LE_CENTRAL 4523 // connecting control 4524 bool connecting_with_whitelist; 4525 switch (hci_stack->le_connecting_state){ 4526 case LE_CONNECTING_DIRECT: 4527 case LE_CONNECTING_WHITELIST: 4528 // stop connecting if: 4529 // - connecting uses white and whitelist modification pending 4530 // - if it got disabled 4531 // - resolving list modified 4532 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4533 if ((connecting_with_whitelist && whitelist_modification_pending) || 4534 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4535 resolving_list_modification_pending) { 4536 4537 connecting_stop = true; 4538 } 4539 break; 4540 default: 4541 break; 4542 } 4543 #endif 4544 4545 #ifdef ENABLE_LE_PERIPHERAL 4546 // le advertisement control 4547 if (hci_stack->le_advertisements_active){ 4548 // stop if: 4549 // - parameter change required 4550 // - random address used in advertising and changes 4551 // - it's disabled 4552 // - whitelist change required but used for advertisement filter policy 4553 // - resolving list modified 4554 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4555 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4556 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4557 if (advertising_change || 4558 (advertising_uses_random_address && random_address_change) || 4559 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4560 (advertising_uses_whitelist && whitelist_modification_pending) || 4561 resolving_list_modification_pending) { 4562 4563 advertising_stop = true; 4564 } 4565 } 4566 #endif 4567 4568 4569 // Phase 2: stop everything that should be off during modifications 4570 4571 #ifdef ENABLE_LE_CENTRAL 4572 if (scanning_stop){ 4573 hci_stack->le_scanning_active = false; 4574 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4575 return true; 4576 } 4577 #endif 4578 4579 #ifdef ENABLE_LE_CENTRAL 4580 if (connecting_stop){ 4581 hci_send_cmd(&hci_le_create_connection_cancel); 4582 return true; 4583 } 4584 #endif 4585 4586 #ifdef ENABLE_LE_PERIPHERAL 4587 if (advertising_stop){ 4588 hci_stack->le_advertisements_active = false; 4589 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4590 return true; 4591 } 4592 #endif 4593 4594 // Phase 3: modify 4595 4596 if (random_address_change){ 4597 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4598 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4599 return true; 4600 } 4601 4602 #ifdef ENABLE_LE_CENTRAL 4603 if (hci_stack->le_scanning_param_update){ 4604 hci_stack->le_scanning_param_update = false; 4605 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4606 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4607 return true; 4608 } 4609 #endif 4610 4611 #ifdef ENABLE_LE_PERIPHERAL 4612 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4613 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4614 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4615 hci_send_cmd(&hci_le_set_advertising_parameters, 4616 hci_stack->le_advertisements_interval_min, 4617 hci_stack->le_advertisements_interval_max, 4618 hci_stack->le_advertisements_type, 4619 hci_stack->le_advertisements_own_addr_type, 4620 hci_stack->le_advertisements_direct_address_type, 4621 hci_stack->le_advertisements_direct_address, 4622 hci_stack->le_advertisements_channel_map, 4623 hci_stack->le_advertisements_filter_policy); 4624 return true; 4625 } 4626 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4627 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4628 uint8_t adv_data_clean[31]; 4629 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4630 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4631 hci_stack->le_advertisements_data_len); 4632 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4633 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4634 return true; 4635 } 4636 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4637 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4638 uint8_t scan_data_clean[31]; 4639 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4640 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4641 hci_stack->le_scan_response_data_len); 4642 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4643 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4644 return true; 4645 } 4646 #endif 4647 4648 4649 #ifdef ENABLE_LE_CENTRAL 4650 // if connect with whitelist was active and is not cancelled yet, wait until next time 4651 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4652 #endif 4653 4654 // LE Whitelist Management 4655 if (whitelist_modification_pending){ 4656 // add/remove entries 4657 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4658 while (btstack_linked_list_iterator_has_next(&lit)){ 4659 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4660 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4661 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4662 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4663 return true; 4664 } 4665 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4666 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4667 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4668 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4669 return true; 4670 } 4671 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4672 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4673 btstack_memory_whitelist_entry_free(entry); 4674 } 4675 } 4676 } 4677 4678 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4679 // LE Resolving List Management 4680 if (resolving_list_supported) { 4681 uint16_t i; 4682 switch (hci_stack->le_resolving_list_state) { 4683 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4684 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4685 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4686 return true; 4687 case LE_RESOLVING_LIST_READ_SIZE: 4688 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4689 hci_send_cmd(&hci_le_read_resolving_list_size); 4690 return true; 4691 case LE_RESOLVING_LIST_SEND_CLEAR: 4692 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4693 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4694 sizeof(hci_stack->le_resolving_list_add_entries)); 4695 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4696 sizeof(hci_stack->le_resolving_list_remove_entries)); 4697 hci_send_cmd(&hci_le_clear_resolving_list); 4698 return true; 4699 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4700 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4701 uint8_t offset = i >> 3; 4702 uint8_t mask = 1 << (i & 7); 4703 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4704 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4705 bd_addr_t peer_identity_addreses; 4706 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4707 sm_key_t peer_irk; 4708 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4709 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4710 4711 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4712 // trigger whitelist entry 'update' (work around for controller bug) 4713 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4714 while (btstack_linked_list_iterator_has_next(&lit)) { 4715 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4716 if (entry->address_type != peer_identity_addr_type) continue; 4717 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4718 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4719 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4720 } 4721 #endif 4722 4723 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4724 peer_identity_addreses); 4725 return true; 4726 } 4727 4728 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4729 4730 /* fall through */ 4731 4732 case LE_RESOLVING_LIST_ADD_ENTRIES: 4733 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4734 uint8_t offset = i >> 3; 4735 uint8_t mask = 1 << (i & 7); 4736 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4737 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4738 bd_addr_t peer_identity_addreses; 4739 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4740 sm_key_t peer_irk; 4741 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4742 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4743 const uint8_t *local_irk = gap_get_persistent_irk(); 4744 // command uses format specifier 'P' that stores 16-byte value without flip 4745 uint8_t local_irk_flipped[16]; 4746 uint8_t peer_irk_flipped[16]; 4747 reverse_128(local_irk, local_irk_flipped); 4748 reverse_128(peer_irk, peer_irk_flipped); 4749 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4750 peer_irk_flipped, local_irk_flipped); 4751 return true; 4752 } 4753 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4754 break; 4755 4756 default: 4757 break; 4758 } 4759 } 4760 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4761 #endif 4762 4763 // post-pone all actions until stack is fully working 4764 if (hci_stack->state != HCI_STATE_WORKING) return false; 4765 4766 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4767 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4768 4769 // Phase 4: restore state 4770 4771 #ifdef ENABLE_LE_CENTRAL 4772 // re-start scanning 4773 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4774 hci_stack->le_scanning_active = true; 4775 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4776 return true; 4777 } 4778 #endif 4779 4780 #ifdef ENABLE_LE_CENTRAL 4781 // re-start connecting 4782 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4783 bd_addr_t null_addr; 4784 memset(null_addr, 0, 6); 4785 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4786 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4787 hci_send_cmd(&hci_le_create_connection, 4788 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4789 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4790 1, // use whitelist 4791 0, // peer address type 4792 null_addr, // peer bd addr 4793 hci_stack->le_connection_own_addr_type, // our addr type: 4794 hci_stack->le_connection_interval_min, // conn interval min 4795 hci_stack->le_connection_interval_max, // conn interval max 4796 hci_stack->le_connection_latency, // conn latency 4797 hci_stack->le_supervision_timeout, // conn latency 4798 hci_stack->le_minimum_ce_length, // min ce length 4799 hci_stack->le_maximum_ce_length // max ce length 4800 ); 4801 return true; 4802 } 4803 #endif 4804 4805 #ifdef ENABLE_LE_PERIPHERAL 4806 // re-start advertising 4807 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4808 // check if advertisements should be enabled given 4809 hci_stack->le_advertisements_active = true; 4810 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4811 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4812 return true; 4813 } 4814 #endif 4815 4816 return false; 4817 } 4818 #endif 4819 4820 static bool hci_run_general_pending_commands(void){ 4821 btstack_linked_item_t * it; 4822 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4823 hci_connection_t * connection = (hci_connection_t *) it; 4824 4825 switch(connection->state){ 4826 case SEND_CREATE_CONNECTION: 4827 switch(connection->address_type){ 4828 #ifdef ENABLE_CLASSIC 4829 case BD_ADDR_TYPE_ACL: 4830 log_info("sending hci_create_connection"); 4831 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4832 break; 4833 #endif 4834 default: 4835 #ifdef ENABLE_BLE 4836 #ifdef ENABLE_LE_CENTRAL 4837 log_info("sending hci_le_create_connection"); 4838 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4839 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4840 hci_send_cmd(&hci_le_create_connection, 4841 hci_stack->le_connection_scan_interval, // conn scan interval 4842 hci_stack->le_connection_scan_window, // conn scan windows 4843 0, // don't use whitelist 4844 connection->address_type, // peer address type 4845 connection->address, // peer bd addr 4846 hci_stack->le_connection_own_addr_type, // our addr type: 4847 hci_stack->le_connection_interval_min, // conn interval min 4848 hci_stack->le_connection_interval_max, // conn interval max 4849 hci_stack->le_connection_latency, // conn latency 4850 hci_stack->le_supervision_timeout, // conn latency 4851 hci_stack->le_minimum_ce_length, // min ce length 4852 hci_stack->le_maximum_ce_length // max ce length 4853 ); 4854 connection->state = SENT_CREATE_CONNECTION; 4855 #endif 4856 #endif 4857 break; 4858 } 4859 return true; 4860 4861 #ifdef ENABLE_CLASSIC 4862 case RECEIVED_CONNECTION_REQUEST: 4863 connection->role = HCI_ROLE_SLAVE; 4864 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4865 log_info("sending hci_accept_connection_request"); 4866 connection->state = ACCEPTED_CONNECTION_REQUEST; 4867 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4868 return true; 4869 } 4870 break; 4871 #endif 4872 4873 #ifdef ENABLE_BLE 4874 #ifdef ENABLE_LE_CENTRAL 4875 case SEND_CANCEL_CONNECTION: 4876 connection->state = SENT_CANCEL_CONNECTION; 4877 hci_send_cmd(&hci_le_create_connection_cancel); 4878 return true; 4879 #endif 4880 #endif 4881 case SEND_DISCONNECT: 4882 connection->state = SENT_DISCONNECT; 4883 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4884 return true; 4885 4886 default: 4887 break; 4888 } 4889 4890 // no further commands if connection is about to get shut down 4891 if (connection->state == SENT_DISCONNECT) continue; 4892 4893 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4894 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4895 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4896 return true; 4897 } 4898 4899 #ifdef ENABLE_CLASSIC 4900 4901 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4902 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4903 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4904 return true; 4905 } 4906 4907 // Handling link key request requires remote supported features 4908 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4909 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4910 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4911 4912 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4913 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4914 if (have_link_key && security_level_sufficient){ 4915 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4916 } else { 4917 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4918 } 4919 return true; 4920 } 4921 4922 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4923 log_info("denying to pin request"); 4924 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4925 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4926 return true; 4927 } 4928 4929 // security assessment requires remote features 4930 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4931 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4932 hci_ssp_assess_security_on_io_cap_request(connection); 4933 // 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 4934 } 4935 4936 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4937 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4938 // set authentication requirements: 4939 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4940 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4941 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4942 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4943 authreq |= 1; 4944 } 4945 bool bonding = hci_stack->bondable; 4946 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4947 // if we have received IO Cap Response, we're in responder role 4948 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4949 if (bonding && !remote_bonding){ 4950 log_info("Remote not bonding, dropping local flag"); 4951 bonding = false; 4952 } 4953 } 4954 if (bonding){ 4955 if (connection->bonding_flags & BONDING_DEDICATED){ 4956 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4957 } else { 4958 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4959 } 4960 } 4961 uint8_t have_oob_data = 0; 4962 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4963 if (connection->classic_oob_c_192 != NULL){ 4964 have_oob_data |= 1; 4965 } 4966 if (connection->classic_oob_c_256 != NULL){ 4967 have_oob_data |= 2; 4968 } 4969 #endif 4970 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4971 return true; 4972 } 4973 4974 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4975 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4976 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4977 return true; 4978 } 4979 4980 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4981 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4982 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4983 const uint8_t zero[16] = { 0 }; 4984 const uint8_t * r_192 = zero; 4985 const uint8_t * c_192 = zero; 4986 const uint8_t * r_256 = zero; 4987 const uint8_t * c_256 = zero; 4988 // verify P-256 OOB 4989 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4990 c_256 = connection->classic_oob_c_256; 4991 if (connection->classic_oob_r_256 != NULL) { 4992 r_256 = connection->classic_oob_r_256; 4993 } 4994 } 4995 // verify P-192 OOB 4996 if ((connection->classic_oob_c_192 != NULL)) { 4997 c_192 = connection->classic_oob_c_192; 4998 if (connection->classic_oob_r_192 != NULL) { 4999 r_192 = connection->classic_oob_r_192; 5000 } 5001 } 5002 5003 // assess security 5004 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5005 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5006 if (need_level_4 && !can_reach_level_4){ 5007 log_info("Level 4 required, but not possible -> abort"); 5008 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5009 // send oob negative reply 5010 c_256 = NULL; 5011 c_192 = NULL; 5012 } 5013 5014 // Reply 5015 if (c_256 != zero) { 5016 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5017 } else if (c_192 != zero){ 5018 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5019 } else { 5020 hci_stack->classic_oob_con_handle = connection->con_handle; 5021 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5022 } 5023 return true; 5024 } 5025 #endif 5026 5027 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5028 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5029 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5030 return true; 5031 } 5032 5033 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5034 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5035 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5036 return true; 5037 } 5038 5039 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5040 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5041 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5042 return true; 5043 } 5044 5045 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5046 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5047 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5048 connection->state = SENT_DISCONNECT; 5049 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5050 return true; 5051 } 5052 5053 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5054 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5055 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5056 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5057 return true; 5058 } 5059 5060 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5061 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5062 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5063 return true; 5064 } 5065 5066 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5067 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5068 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5069 return true; 5070 } 5071 5072 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5073 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5074 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5075 return true; 5076 } 5077 5078 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5079 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5080 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5081 return true; 5082 } 5083 5084 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5085 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5086 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5087 return true; 5088 } 5089 #endif 5090 5091 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5092 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5093 #ifdef ENABLE_CLASSIC 5094 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5095 #endif 5096 if (connection->state != SENT_DISCONNECT){ 5097 connection->state = SENT_DISCONNECT; 5098 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5099 return true; 5100 } 5101 } 5102 5103 #ifdef ENABLE_CLASSIC 5104 uint16_t sniff_min_interval; 5105 switch (connection->sniff_min_interval){ 5106 case 0: 5107 break; 5108 case 0xffff: 5109 connection->sniff_min_interval = 0; 5110 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5111 return true; 5112 default: 5113 sniff_min_interval = connection->sniff_min_interval; 5114 connection->sniff_min_interval = 0; 5115 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5116 return true; 5117 } 5118 5119 if (connection->sniff_subrating_max_latency != 0xffff){ 5120 uint16_t max_latency = connection->sniff_subrating_max_latency; 5121 connection->sniff_subrating_max_latency = 0; 5122 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5123 return true; 5124 } 5125 5126 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5127 uint8_t service_type = (uint8_t) connection->qos_service_type; 5128 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5129 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); 5130 return true; 5131 } 5132 5133 if (connection->request_role != HCI_ROLE_INVALID){ 5134 hci_role_t role = connection->request_role; 5135 connection->request_role = HCI_ROLE_INVALID; 5136 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5137 return true; 5138 } 5139 #endif 5140 5141 #ifdef ENABLE_BLE 5142 switch (connection->le_con_parameter_update_state){ 5143 // response to L2CAP CON PARAMETER UPDATE REQUEST 5144 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5145 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5146 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5147 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5148 0x0000, 0xffff); 5149 return true; 5150 case CON_PARAMETER_UPDATE_REPLY: 5151 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5152 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5153 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5154 0x0000, 0xffff); 5155 return true; 5156 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5157 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5158 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5159 return true; 5160 default: 5161 break; 5162 } 5163 if (connection->le_phy_update_all_phys != 0xffu){ 5164 uint8_t all_phys = connection->le_phy_update_all_phys; 5165 connection->le_phy_update_all_phys = 0xff; 5166 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); 5167 return true; 5168 } 5169 #endif 5170 } 5171 return false; 5172 } 5173 5174 static void hci_run(void){ 5175 5176 // stack state sub statemachines 5177 // halting needs to be called even if we cannot send command packet now 5178 switch (hci_stack->state) { 5179 case HCI_STATE_INITIALIZING: 5180 hci_initializing_run(); 5181 break; 5182 case HCI_STATE_HALTING: 5183 hci_halting_run(); 5184 break; 5185 case HCI_STATE_FALLING_ASLEEP: 5186 hci_falling_asleep_run(); 5187 break; 5188 default: 5189 break; 5190 } 5191 5192 bool done; 5193 5194 // send continuation fragments first, as they block the prepared packet buffer 5195 done = hci_run_acl_fragments(); 5196 if (done) return; 5197 5198 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5199 // send host num completed packets next as they don't require num_cmd_packets > 0 5200 if (!hci_can_send_comand_packet_transport()) return; 5201 if (hci_stack->host_completed_packets){ 5202 hci_host_num_completed_packets(); 5203 return; 5204 } 5205 #endif 5206 5207 if (!hci_can_send_command_packet_now()) return; 5208 5209 // global/non-connection oriented commands 5210 5211 5212 #ifdef ENABLE_CLASSIC 5213 // general gap classic 5214 done = hci_run_general_gap_classic(); 5215 if (done) return; 5216 #endif 5217 5218 #ifdef ENABLE_BLE 5219 // general gap le 5220 done = hci_run_general_gap_le(); 5221 if (done) return; 5222 #endif 5223 5224 // send pending HCI commands 5225 hci_run_general_pending_commands(); 5226 } 5227 5228 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5229 // house-keeping 5230 5231 #ifdef ENABLE_CLASSIC 5232 bd_addr_t addr; 5233 hci_connection_t * conn; 5234 #endif 5235 #ifdef ENABLE_LE_CENTRAL 5236 uint8_t initiator_filter_policy; 5237 #endif 5238 5239 uint16_t opcode = little_endian_read_16(packet, 0); 5240 switch (opcode) { 5241 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5242 hci_stack->loopback_mode = packet[3]; 5243 break; 5244 5245 #ifdef ENABLE_CLASSIC 5246 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5247 reverse_bd_addr(&packet[3], addr); 5248 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5249 5250 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5251 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5252 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5253 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5254 } 5255 5256 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5257 if (!conn) { 5258 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5259 if (!conn) { 5260 // notify client that alloc failed 5261 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5262 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5263 } 5264 conn->state = SEND_CREATE_CONNECTION; 5265 conn->role = HCI_ROLE_MASTER; 5266 } 5267 5268 conn->con_handle = HCI_CON_HANDLE_INVALID; 5269 conn->role = HCI_ROLE_INVALID; 5270 5271 log_info("conn state %u", conn->state); 5272 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5273 switch (conn->state) { 5274 // if connection active exists 5275 case OPEN: 5276 // and OPEN, emit connection complete command 5277 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5278 // packet not sent to controller 5279 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5280 case RECEIVED_DISCONNECTION_COMPLETE: 5281 // create connection triggered in disconnect complete event, let's do it now 5282 break; 5283 case SEND_CREATE_CONNECTION: 5284 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5285 break; 5286 default: 5287 // otherwise, just ignore as it is already in the open process 5288 // packet not sent to controller 5289 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5290 } 5291 conn->state = SENT_CREATE_CONNECTION; 5292 5293 // track outgoing connection 5294 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5295 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5296 break; 5297 5298 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5299 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5300 // setup_synchronous_connection? Voice setting at offset 22 5301 // TODO: compare to current setting if sco connection already active 5302 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5303 break; 5304 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5305 // accept_synchronous_connection? Voice setting at offset 18 5306 // TODO: compare to current setting if sco connection already active 5307 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5308 // track outgoing connection 5309 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5310 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5311 break; 5312 #endif 5313 #endif 5314 5315 #ifdef ENABLE_BLE 5316 #ifdef ENABLE_LE_CENTRAL 5317 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5318 // white list used? 5319 initiator_filter_policy = packet[7]; 5320 switch (initiator_filter_policy) { 5321 case 0: 5322 // whitelist not used 5323 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5324 break; 5325 case 1: 5326 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5327 break; 5328 default: 5329 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5330 break; 5331 } 5332 // track outgoing connection 5333 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5334 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5335 break; 5336 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5337 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5338 break; 5339 #endif 5340 #endif 5341 default: 5342 break; 5343 } 5344 5345 hci_stack->num_cmd_packets--; 5346 5347 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5348 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5349 if (err != 0){ 5350 return ERROR_CODE_HARDWARE_FAILURE; 5351 } 5352 return ERROR_CODE_SUCCESS; 5353 } 5354 5355 // disconnect because of security block 5356 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5357 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5358 if (!connection) return; 5359 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5360 } 5361 5362 5363 // Configure Secure Simple Pairing 5364 5365 #ifdef ENABLE_CLASSIC 5366 5367 // enable will enable SSP during init 5368 void gap_ssp_set_enable(int enable){ 5369 hci_stack->ssp_enable = enable; 5370 } 5371 5372 static int hci_local_ssp_activated(void){ 5373 return gap_ssp_supported() && hci_stack->ssp_enable; 5374 } 5375 5376 // if set, BTstack will respond to io capability request using authentication requirement 5377 void gap_ssp_set_io_capability(int io_capability){ 5378 hci_stack->ssp_io_capability = io_capability; 5379 } 5380 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5381 hci_stack->ssp_authentication_requirement = authentication_requirement; 5382 } 5383 5384 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5385 void gap_ssp_set_auto_accept(int auto_accept){ 5386 hci_stack->ssp_auto_accept = auto_accept; 5387 } 5388 5389 void gap_secure_connections_enable(bool enable){ 5390 hci_stack->secure_connections_enable = enable; 5391 } 5392 5393 #endif 5394 5395 // va_list part of hci_send_cmd 5396 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5397 if (!hci_can_send_command_packet_now()){ 5398 log_error("hci_send_cmd called but cannot send packet now"); 5399 return ERROR_CODE_COMMAND_DISALLOWED; 5400 } 5401 5402 // for HCI INITIALIZATION 5403 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5404 hci_stack->last_cmd_opcode = cmd->opcode; 5405 5406 hci_reserve_packet_buffer(); 5407 uint8_t * packet = hci_stack->hci_packet_buffer; 5408 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5409 uint8_t status = hci_send_cmd_packet(packet, size); 5410 5411 // release packet buffer on error or for synchronous transport implementations 5412 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5413 hci_release_packet_buffer(); 5414 hci_emit_transport_packet_sent(); 5415 } 5416 5417 return status; 5418 } 5419 5420 /** 5421 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5422 */ 5423 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5424 va_list argptr; 5425 va_start(argptr, cmd); 5426 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5427 va_end(argptr); 5428 return status; 5429 } 5430 5431 // Create various non-HCI events. 5432 // TODO: generalize, use table similar to hci_create_command 5433 5434 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5435 // dump packet 5436 if (dump) { 5437 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5438 } 5439 5440 // dispatch to all event handlers 5441 btstack_linked_list_iterator_t it; 5442 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5443 while (btstack_linked_list_iterator_has_next(&it)){ 5444 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5445 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5446 } 5447 } 5448 5449 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5450 if (!hci_stack->acl_packet_handler) return; 5451 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5452 } 5453 5454 #ifdef ENABLE_CLASSIC 5455 static void hci_notify_if_sco_can_send_now(void){ 5456 // notify SCO sender if waiting 5457 if (!hci_stack->sco_waiting_for_can_send_now) return; 5458 if (hci_can_send_sco_packet_now()){ 5459 hci_stack->sco_waiting_for_can_send_now = 0; 5460 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5461 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5462 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5463 } 5464 } 5465 5466 // parsing end emitting has been merged to reduce code size 5467 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5468 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5469 5470 uint8_t * eir_data; 5471 ad_context_t context; 5472 const uint8_t * name; 5473 uint8_t name_len; 5474 5475 if (size < 3) return; 5476 5477 int event_type = hci_event_packet_get_type(packet); 5478 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5479 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5480 5481 switch (event_type){ 5482 case HCI_EVENT_INQUIRY_RESULT: 5483 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5484 if (size != (3 + (num_responses * 14))) return; 5485 break; 5486 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5487 if (size != 257) return; 5488 if (num_responses != 1) return; 5489 break; 5490 default: 5491 return; 5492 } 5493 5494 // event[1] is set at the end 5495 int i; 5496 for (i=0; i<num_responses;i++){ 5497 memset(event, 0, sizeof(event)); 5498 event[0] = GAP_EVENT_INQUIRY_RESULT; 5499 uint8_t event_size = 27; // if name is not set by EIR 5500 5501 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5502 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5503 (void)memcpy(&event[9], 5504 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5505 3); // class of device 5506 (void)memcpy(&event[12], 5507 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5508 2); // clock offset 5509 5510 switch (event_type){ 5511 case HCI_EVENT_INQUIRY_RESULT: 5512 // 14,15,16,17 = 0, size 18 5513 break; 5514 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5515 event[14] = 1; 5516 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5517 // 16,17 = 0, size 18 5518 break; 5519 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5520 event[14] = 1; 5521 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5522 // EIR packets only contain a single inquiry response 5523 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5524 name = NULL; 5525 // Iterate over EIR data 5526 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5527 uint8_t data_type = ad_iterator_get_data_type(&context); 5528 uint8_t data_size = ad_iterator_get_data_len(&context); 5529 const uint8_t * data = ad_iterator_get_data(&context); 5530 // Prefer Complete Local Name over Shortened Local Name 5531 switch (data_type){ 5532 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5533 if (name) continue; 5534 /* fall through */ 5535 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5536 name = data; 5537 name_len = data_size; 5538 break; 5539 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5540 if (data_size != 8) break; 5541 event[16] = 1; 5542 memcpy(&event[17], data, 8); 5543 break; 5544 default: 5545 break; 5546 } 5547 } 5548 if (name){ 5549 event[25] = 1; 5550 // truncate name if needed 5551 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5552 event[26] = len; 5553 (void)memcpy(&event[27], name, len); 5554 event_size += len; 5555 } 5556 break; 5557 default: 5558 return; 5559 } 5560 event[1] = event_size - 2; 5561 hci_emit_event(event, event_size, 1); 5562 } 5563 } 5564 #endif 5565 5566 void hci_emit_state(void){ 5567 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5568 uint8_t event[3]; 5569 event[0] = BTSTACK_EVENT_STATE; 5570 event[1] = sizeof(event) - 2u; 5571 event[2] = hci_stack->state; 5572 hci_emit_event(event, sizeof(event), 1); 5573 } 5574 5575 #ifdef ENABLE_CLASSIC 5576 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5577 uint8_t event[13]; 5578 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5579 event[1] = sizeof(event) - 2; 5580 event[2] = status; 5581 little_endian_store_16(event, 3, con_handle); 5582 reverse_bd_addr(address, &event[5]); 5583 event[11] = 1; // ACL connection 5584 event[12] = 0; // encryption disabled 5585 hci_emit_event(event, sizeof(event), 1); 5586 } 5587 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5588 if (disable_l2cap_timeouts) return; 5589 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5590 uint8_t event[4]; 5591 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5592 event[1] = sizeof(event) - 2; 5593 little_endian_store_16(event, 2, conn->con_handle); 5594 hci_emit_event(event, sizeof(event), 1); 5595 } 5596 #endif 5597 5598 #ifdef ENABLE_BLE 5599 #ifdef ENABLE_LE_CENTRAL 5600 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){ 5601 uint8_t event[21]; 5602 event[0] = HCI_EVENT_LE_META; 5603 event[1] = sizeof(event) - 2u; 5604 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5605 event[3] = status; 5606 little_endian_store_16(event, 4, con_handle); 5607 event[6] = 0; // TODO: role 5608 event[7] = address_type; 5609 reverse_bd_addr(address, &event[8]); 5610 little_endian_store_16(event, 14, 0); // interval 5611 little_endian_store_16(event, 16, 0); // latency 5612 little_endian_store_16(event, 18, 0); // supervision timeout 5613 event[20] = 0; // master clock accuracy 5614 hci_emit_event(event, sizeof(event), 1); 5615 } 5616 #endif 5617 #endif 5618 5619 static void hci_emit_transport_packet_sent(void){ 5620 // notify upper stack that it might be possible to send again 5621 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5622 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5623 } 5624 5625 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5626 uint8_t event[6]; 5627 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5628 event[1] = sizeof(event) - 2u; 5629 event[2] = 0; // status = OK 5630 little_endian_store_16(event, 3, con_handle); 5631 event[5] = reason; 5632 hci_emit_event(event, sizeof(event), 1); 5633 } 5634 5635 static void hci_emit_nr_connections_changed(void){ 5636 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5637 uint8_t event[3]; 5638 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5639 event[1] = sizeof(event) - 2u; 5640 event[2] = nr_hci_connections(); 5641 hci_emit_event(event, sizeof(event), 1); 5642 } 5643 5644 static void hci_emit_hci_open_failed(void){ 5645 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5646 uint8_t event[2]; 5647 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5648 event[1] = sizeof(event) - 2u; 5649 hci_emit_event(event, sizeof(event), 1); 5650 } 5651 5652 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5653 log_info("hci_emit_dedicated_bonding_result %u ", status); 5654 uint8_t event[9]; 5655 int pos = 0; 5656 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5657 event[pos++] = sizeof(event) - 2u; 5658 event[pos++] = status; 5659 reverse_bd_addr(address, &event[pos]); 5660 hci_emit_event(event, sizeof(event), 1); 5661 } 5662 5663 5664 #ifdef ENABLE_CLASSIC 5665 5666 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5667 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5668 uint8_t event[5]; 5669 int pos = 0; 5670 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5671 event[pos++] = sizeof(event) - 2; 5672 little_endian_store_16(event, 2, con_handle); 5673 pos += 2; 5674 event[pos++] = level; 5675 hci_emit_event(event, sizeof(event), 1); 5676 } 5677 5678 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5679 if (!connection) return LEVEL_0; 5680 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5681 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5682 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5683 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5684 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5685 // LEVEL 4 always requires 128 bit encrytion key size 5686 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5687 security_level = LEVEL_3; 5688 } 5689 return security_level; 5690 } 5691 5692 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5693 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5694 uint8_t event[3]; 5695 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5696 event[1] = sizeof(event) - 2; 5697 event[2] = enabled; 5698 hci_emit_event(event, sizeof(event), 1); 5699 } 5700 5701 // query if remote side supports eSCO 5702 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5703 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5704 if (!connection) return false; 5705 return (connection->remote_supported_features[0] & 1) != 0; 5706 } 5707 5708 static bool hci_ssp_supported(hci_connection_t * connection){ 5709 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5710 return (connection->bonding_flags & mask) == mask; 5711 } 5712 5713 // query if remote side supports SSP 5714 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5715 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5716 if (!connection) return false; 5717 return hci_ssp_supported(connection) ? 1 : 0; 5718 } 5719 5720 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5721 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5722 } 5723 5724 /** 5725 * Check if remote supported features query has completed 5726 */ 5727 bool hci_remote_features_available(hci_con_handle_t handle){ 5728 hci_connection_t * connection = hci_connection_for_handle(handle); 5729 if (!connection) return false; 5730 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5731 } 5732 5733 /** 5734 * Trigger remote supported features query 5735 */ 5736 5737 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5738 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5739 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5740 } 5741 } 5742 5743 void hci_remote_features_query(hci_con_handle_t con_handle){ 5744 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5745 if (!connection) return; 5746 hci_trigger_remote_features_for_connection(connection); 5747 hci_run(); 5748 } 5749 5750 // GAP API 5751 /** 5752 * @bbrief enable/disable bonding. default is enabled 5753 * @praram enabled 5754 */ 5755 void gap_set_bondable_mode(int enable){ 5756 hci_stack->bondable = enable ? 1 : 0; 5757 } 5758 /** 5759 * @brief Get bondable mode. 5760 * @return 1 if bondable 5761 */ 5762 int gap_get_bondable_mode(void){ 5763 return hci_stack->bondable; 5764 } 5765 5766 /** 5767 * @brief map link keys to security levels 5768 */ 5769 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5770 switch (link_key_type){ 5771 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5772 return LEVEL_4; 5773 case COMBINATION_KEY: 5774 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5775 return LEVEL_3; 5776 default: 5777 return LEVEL_2; 5778 } 5779 } 5780 5781 /** 5782 * @brief map link keys to secure connection yes/no 5783 */ 5784 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5785 switch (link_key_type){ 5786 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5787 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5788 return true; 5789 default: 5790 return false; 5791 } 5792 } 5793 5794 /** 5795 * @brief map link keys to authenticated 5796 */ 5797 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5798 switch (link_key_type){ 5799 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5800 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5801 return true; 5802 default: 5803 return false; 5804 } 5805 } 5806 5807 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5808 log_info("gap_mitm_protection_required_for_security_level %u", level); 5809 return level > LEVEL_2; 5810 } 5811 5812 /** 5813 * @brief get current security level 5814 */ 5815 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5816 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5817 if (!connection) return LEVEL_0; 5818 return gap_security_level_for_connection(connection); 5819 } 5820 5821 /** 5822 * @brief request connection to device to 5823 * @result GAP_AUTHENTICATION_RESULT 5824 */ 5825 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5826 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5827 if (!connection){ 5828 hci_emit_security_level(con_handle, LEVEL_0); 5829 return; 5830 } 5831 5832 btstack_assert(hci_is_le_connection(connection) == false); 5833 5834 // 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) 5835 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5836 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5837 requested_level = LEVEL_4; 5838 } 5839 5840 gap_security_level_t current_level = gap_security_level(con_handle); 5841 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5842 requested_level, connection->requested_security_level, current_level); 5843 5844 // authentication active if authentication request was sent or planned level > 0 5845 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5846 if (authentication_active){ 5847 // authentication already active 5848 if (connection->requested_security_level < requested_level){ 5849 // increase requested level as new level is higher 5850 // TODO: handle re-authentication when done 5851 connection->requested_security_level = requested_level; 5852 } 5853 } else { 5854 // no request active, notify if security sufficient 5855 if (requested_level <= current_level){ 5856 hci_emit_security_level(con_handle, current_level); 5857 return; 5858 } 5859 5860 // store request 5861 connection->requested_security_level = requested_level; 5862 5863 // request remote features if not already active 5864 hci_remote_features_query(con_handle); 5865 5866 // start to authenticate connection 5867 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5868 hci_run(); 5869 } 5870 } 5871 5872 /** 5873 * @brief start dedicated bonding with device. disconnect after bonding 5874 * @param device 5875 * @param request MITM protection 5876 * @result GAP_DEDICATED_BONDING_COMPLETE 5877 */ 5878 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5879 5880 // create connection state machine 5881 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5882 5883 if (!connection){ 5884 return BTSTACK_MEMORY_ALLOC_FAILED; 5885 } 5886 5887 // delete linkn key 5888 gap_drop_link_key_for_bd_addr(device); 5889 5890 // configure LEVEL_2/3, dedicated bonding 5891 connection->state = SEND_CREATE_CONNECTION; 5892 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5893 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5894 connection->bonding_flags = BONDING_DEDICATED; 5895 5896 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5897 5898 // handle: connnection failure (connection complete != ok) 5899 // handle: authentication failure 5900 // handle: disconnect on done 5901 5902 hci_run(); 5903 5904 return 0; 5905 } 5906 5907 void gap_set_local_name(const char * local_name){ 5908 hci_stack->local_name = local_name; 5909 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 5910 // also update EIR if not set by user 5911 if (hci_stack->eir_data == NULL){ 5912 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 5913 } 5914 hci_run(); 5915 } 5916 #endif 5917 5918 5919 #ifdef ENABLE_BLE 5920 5921 #ifdef ENABLE_LE_CENTRAL 5922 void gap_start_scan(void){ 5923 hci_stack->le_scanning_enabled = true; 5924 hci_run(); 5925 } 5926 5927 void gap_stop_scan(void){ 5928 hci_stack->le_scanning_enabled = false; 5929 hci_run(); 5930 } 5931 5932 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5933 hci_stack->le_scan_type = scan_type; 5934 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5935 hci_stack->le_scan_interval = scan_interval; 5936 hci_stack->le_scan_window = scan_window; 5937 hci_stack->le_scanning_param_update = true; 5938 hci_run(); 5939 } 5940 5941 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5942 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5943 } 5944 5945 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5946 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5947 if (!conn){ 5948 // disallow if le connection is already outgoing 5949 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5950 log_error("le connection already active"); 5951 return ERROR_CODE_COMMAND_DISALLOWED; 5952 } 5953 5954 log_info("gap_connect: no connection exists yet, creating context"); 5955 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5956 if (!conn){ 5957 // notify client that alloc failed 5958 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5959 log_info("gap_connect: failed to alloc hci_connection_t"); 5960 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5961 } 5962 5963 // set le connecting state 5964 if (hci_is_le_connection_type(addr_type)){ 5965 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5966 } 5967 5968 conn->state = SEND_CREATE_CONNECTION; 5969 log_info("gap_connect: send create connection next"); 5970 hci_run(); 5971 return ERROR_CODE_SUCCESS; 5972 } 5973 5974 if (!hci_is_le_connection(conn) || 5975 (conn->state == SEND_CREATE_CONNECTION) || 5976 (conn->state == SENT_CREATE_CONNECTION)) { 5977 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5978 log_error("gap_connect: classic connection or connect is already being created"); 5979 return GATT_CLIENT_IN_WRONG_STATE; 5980 } 5981 5982 // check if connection was just disconnected 5983 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5984 log_info("gap_connect: send create connection (again)"); 5985 conn->state = SEND_CREATE_CONNECTION; 5986 hci_run(); 5987 return ERROR_CODE_SUCCESS; 5988 } 5989 5990 log_info("gap_connect: context exists with state %u", conn->state); 5991 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5992 hci_run(); 5993 return ERROR_CODE_SUCCESS; 5994 } 5995 5996 // @assumption: only a single outgoing LE Connection exists 5997 static hci_connection_t * gap_get_outgoing_connection(void){ 5998 btstack_linked_item_t *it; 5999 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6000 hci_connection_t * conn = (hci_connection_t *) it; 6001 if (!hci_is_le_connection(conn)) continue; 6002 switch (conn->state){ 6003 case SEND_CREATE_CONNECTION: 6004 case SENT_CREATE_CONNECTION: 6005 case SENT_CANCEL_CONNECTION: 6006 return conn; 6007 default: 6008 break; 6009 }; 6010 } 6011 return NULL; 6012 } 6013 6014 uint8_t gap_connect_cancel(void){ 6015 hci_connection_t * conn = gap_get_outgoing_connection(); 6016 if (!conn) return 0; 6017 switch (conn->state){ 6018 case SEND_CREATE_CONNECTION: 6019 // skip sending create connection and emit event instead 6020 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6021 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6022 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6023 btstack_memory_hci_connection_free( conn ); 6024 break; 6025 case SENT_CREATE_CONNECTION: 6026 // request to send cancel connection 6027 conn->state = SEND_CANCEL_CONNECTION; 6028 hci_run(); 6029 break; 6030 default: 6031 break; 6032 } 6033 return 0; 6034 } 6035 #endif 6036 6037 #ifdef ENABLE_LE_CENTRAL 6038 /** 6039 * @brief Set connection parameters for outgoing connections 6040 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6041 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6042 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6043 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6044 * @param conn_latency, default: 4 6045 * @param supervision_timeout (unit: 10ms), default: 720 ms 6046 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6047 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6048 */ 6049 6050 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6051 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6052 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6053 hci_stack->le_connection_scan_interval = conn_scan_interval; 6054 hci_stack->le_connection_scan_window = conn_scan_window; 6055 hci_stack->le_connection_interval_min = conn_interval_min; 6056 hci_stack->le_connection_interval_max = conn_interval_max; 6057 hci_stack->le_connection_latency = conn_latency; 6058 hci_stack->le_supervision_timeout = supervision_timeout; 6059 hci_stack->le_minimum_ce_length = min_ce_length; 6060 hci_stack->le_maximum_ce_length = max_ce_length; 6061 } 6062 #endif 6063 6064 /** 6065 * @brief Updates the connection parameters for a given LE connection 6066 * @param handle 6067 * @param conn_interval_min (unit: 1.25ms) 6068 * @param conn_interval_max (unit: 1.25ms) 6069 * @param conn_latency 6070 * @param supervision_timeout (unit: 10ms) 6071 * @return 0 if ok 6072 */ 6073 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6074 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6075 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6076 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6077 connection->le_conn_interval_min = conn_interval_min; 6078 connection->le_conn_interval_max = conn_interval_max; 6079 connection->le_conn_latency = conn_latency; 6080 connection->le_supervision_timeout = supervision_timeout; 6081 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6082 hci_run(); 6083 return 0; 6084 } 6085 6086 /** 6087 * @brief Request an update of the connection parameter for a given LE connection 6088 * @param handle 6089 * @param conn_interval_min (unit: 1.25ms) 6090 * @param conn_interval_max (unit: 1.25ms) 6091 * @param conn_latency 6092 * @param supervision_timeout (unit: 10ms) 6093 * @return 0 if ok 6094 */ 6095 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6096 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6097 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6098 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6099 connection->le_conn_interval_min = conn_interval_min; 6100 connection->le_conn_interval_max = conn_interval_max; 6101 connection->le_conn_latency = conn_latency; 6102 connection->le_supervision_timeout = supervision_timeout; 6103 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6104 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6105 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6106 return 0; 6107 } 6108 6109 #ifdef ENABLE_LE_PERIPHERAL 6110 6111 /** 6112 * @brief Set Advertisement Data 6113 * @param advertising_data_length 6114 * @param advertising_data (max 31 octets) 6115 * @note data is not copied, pointer has to stay valid 6116 */ 6117 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6118 hci_stack->le_advertisements_data_len = advertising_data_length; 6119 hci_stack->le_advertisements_data = advertising_data; 6120 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6121 hci_run(); 6122 } 6123 6124 /** 6125 * @brief Set Scan Response Data 6126 * @param advertising_data_length 6127 * @param advertising_data (max 31 octets) 6128 * @note data is not copied, pointer has to stay valid 6129 */ 6130 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6131 hci_stack->le_scan_response_data_len = scan_response_data_length; 6132 hci_stack->le_scan_response_data = scan_response_data; 6133 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6134 hci_run(); 6135 } 6136 6137 /** 6138 * @brief Set Advertisement Parameters 6139 * @param adv_int_min 6140 * @param adv_int_max 6141 * @param adv_type 6142 * @param direct_address_type 6143 * @param direct_address 6144 * @param channel_map 6145 * @param filter_policy 6146 * 6147 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6148 */ 6149 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6150 uint8_t direct_address_typ, bd_addr_t direct_address, 6151 uint8_t channel_map, uint8_t filter_policy) { 6152 6153 hci_stack->le_advertisements_interval_min = adv_int_min; 6154 hci_stack->le_advertisements_interval_max = adv_int_max; 6155 hci_stack->le_advertisements_type = adv_type; 6156 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6157 hci_stack->le_advertisements_channel_map = channel_map; 6158 hci_stack->le_advertisements_filter_policy = filter_policy; 6159 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6160 6); 6161 6162 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6163 hci_run(); 6164 } 6165 6166 /** 6167 * @brief Enable/Disable Advertisements 6168 * @param enabled 6169 */ 6170 void gap_advertisements_enable(int enabled){ 6171 hci_stack->le_advertisements_enabled = enabled != 0; 6172 hci_update_advertisements_enabled_for_current_roles(); 6173 hci_run(); 6174 } 6175 6176 #endif 6177 6178 void hci_le_set_own_address_type(uint8_t own_address_type){ 6179 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6180 if (own_address_type == hci_stack->le_own_addr_type) return; 6181 hci_stack->le_own_addr_type = own_address_type; 6182 6183 #ifdef ENABLE_LE_PERIPHERAL 6184 // update advertisement parameters, too 6185 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6186 hci_run(); 6187 #endif 6188 #ifdef ENABLE_LE_CENTRAL 6189 // note: we don't update scan parameters or modify ongoing connection attempts 6190 #endif 6191 } 6192 6193 void hci_le_random_address_set(const bd_addr_t random_address){ 6194 memcpy(hci_stack->le_random_address, random_address, 6); 6195 hci_stack->le_random_address_set = true; 6196 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6197 hci_run(); 6198 } 6199 6200 #endif 6201 6202 uint8_t gap_disconnect(hci_con_handle_t handle){ 6203 hci_connection_t * conn = hci_connection_for_handle(handle); 6204 if (!conn){ 6205 hci_emit_disconnection_complete(handle, 0); 6206 return 0; 6207 } 6208 // ignore if already disconnected 6209 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6210 return 0; 6211 } 6212 conn->state = SEND_DISCONNECT; 6213 hci_run(); 6214 return 0; 6215 } 6216 6217 int gap_read_rssi(hci_con_handle_t con_handle){ 6218 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6219 if (hci_connection == NULL) return 0; 6220 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6221 hci_run(); 6222 return 1; 6223 } 6224 6225 /** 6226 * @brief Get connection type 6227 * @param con_handle 6228 * @result connection_type 6229 */ 6230 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6231 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6232 if (!conn) return GAP_CONNECTION_INVALID; 6233 switch (conn->address_type){ 6234 case BD_ADDR_TYPE_LE_PUBLIC: 6235 case BD_ADDR_TYPE_LE_RANDOM: 6236 return GAP_CONNECTION_LE; 6237 case BD_ADDR_TYPE_SCO: 6238 return GAP_CONNECTION_SCO; 6239 case BD_ADDR_TYPE_ACL: 6240 return GAP_CONNECTION_ACL; 6241 default: 6242 return GAP_CONNECTION_INVALID; 6243 } 6244 } 6245 6246 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6247 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6248 if (!conn) return HCI_ROLE_INVALID; 6249 return (hci_role_t) conn->role; 6250 } 6251 6252 6253 #ifdef ENABLE_CLASSIC 6254 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6255 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6256 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6257 conn->request_role = role; 6258 hci_run(); 6259 return ERROR_CODE_SUCCESS; 6260 } 6261 #endif 6262 6263 #ifdef ENABLE_BLE 6264 6265 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){ 6266 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6267 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6268 6269 conn->le_phy_update_all_phys = all_phys; 6270 conn->le_phy_update_tx_phys = tx_phys; 6271 conn->le_phy_update_rx_phys = rx_phys; 6272 conn->le_phy_update_phy_options = phy_options; 6273 6274 hci_run(); 6275 6276 return 0; 6277 } 6278 6279 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6280 // check if already in list 6281 btstack_linked_list_iterator_t it; 6282 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6283 while (btstack_linked_list_iterator_has_next(&it)) { 6284 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6285 if (entry->address_type != address_type) { 6286 continue; 6287 } 6288 if (memcmp(entry->address, address, 6) != 0) { 6289 continue; 6290 } 6291 // disallow if already scheduled to add 6292 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6293 return ERROR_CODE_COMMAND_DISALLOWED; 6294 } 6295 // still on controller, but scheduled to remove -> re-add 6296 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6297 return ERROR_CODE_SUCCESS; 6298 } 6299 // alloc and add to list 6300 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6301 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6302 entry->address_type = address_type; 6303 (void)memcpy(entry->address, address, 6); 6304 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6305 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6306 return ERROR_CODE_SUCCESS; 6307 } 6308 6309 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6310 btstack_linked_list_iterator_t it; 6311 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6312 while (btstack_linked_list_iterator_has_next(&it)){ 6313 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6314 if (entry->address_type != address_type) { 6315 continue; 6316 } 6317 if (memcmp(entry->address, address, 6) != 0) { 6318 continue; 6319 } 6320 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6321 // remove from controller if already present 6322 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6323 } else { 6324 // directly remove entry from whitelist 6325 btstack_linked_list_iterator_remove(&it); 6326 btstack_memory_whitelist_entry_free(entry); 6327 } 6328 return ERROR_CODE_SUCCESS; 6329 } 6330 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6331 } 6332 6333 static void hci_whitelist_clear(void){ 6334 btstack_linked_list_iterator_t it; 6335 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6336 while (btstack_linked_list_iterator_has_next(&it)){ 6337 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6338 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6339 // remove from controller if already present 6340 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6341 continue; 6342 } 6343 // directly remove entry from whitelist 6344 btstack_linked_list_iterator_remove(&it); 6345 btstack_memory_whitelist_entry_free(entry); 6346 } 6347 } 6348 6349 // free all entries unconditionally 6350 static void hci_whitelist_free(void){ 6351 btstack_linked_list_iterator_t lit; 6352 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6353 while (btstack_linked_list_iterator_has_next(&lit)){ 6354 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6355 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6356 btstack_memory_whitelist_entry_free(entry); 6357 } 6358 } 6359 6360 /** 6361 * @brief Clear Whitelist 6362 * @return 0 if ok 6363 */ 6364 uint8_t gap_whitelist_clear(void){ 6365 hci_whitelist_clear(); 6366 hci_run(); 6367 return ERROR_CODE_SUCCESS; 6368 } 6369 6370 /** 6371 * @brief Add Device to Whitelist 6372 * @param address_typ 6373 * @param address 6374 * @return 0 if ok 6375 */ 6376 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6377 uint8_t status = hci_whitelist_add(address_type, address); 6378 if (status){ 6379 return status; 6380 } 6381 hci_run(); 6382 return ERROR_CODE_SUCCESS; 6383 } 6384 6385 /** 6386 * @brief Remove Device from Whitelist 6387 * @param address_typ 6388 * @param address 6389 * @return 0 if ok 6390 */ 6391 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6392 uint8_t status = hci_whitelist_remove(address_type, address); 6393 if (status){ 6394 return status; 6395 } 6396 hci_run(); 6397 return ERROR_CODE_SUCCESS; 6398 } 6399 6400 #ifdef ENABLE_LE_CENTRAL 6401 /** 6402 * @brief Connect with Whitelist 6403 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6404 * @return - if ok 6405 */ 6406 uint8_t gap_connect_with_whitelist(void){ 6407 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6408 return ERROR_CODE_COMMAND_DISALLOWED; 6409 } 6410 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6411 hci_run(); 6412 return ERROR_CODE_SUCCESS; 6413 } 6414 6415 /** 6416 * @brief Auto Connection Establishment - Start Connecting to device 6417 * @param address_typ 6418 * @param address 6419 * @return 0 if ok 6420 */ 6421 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6422 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6423 return ERROR_CODE_COMMAND_DISALLOWED; 6424 } 6425 6426 uint8_t status = hci_whitelist_add(address_type, address); 6427 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6428 return status; 6429 } 6430 6431 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6432 6433 hci_run(); 6434 return ERROR_CODE_SUCCESS; 6435 } 6436 6437 /** 6438 * @brief Auto Connection Establishment - Stop Connecting to device 6439 * @param address_typ 6440 * @param address 6441 * @return 0 if ok 6442 */ 6443 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6444 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6445 return ERROR_CODE_COMMAND_DISALLOWED; 6446 } 6447 6448 hci_whitelist_remove(address_type, address); 6449 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6450 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6451 } 6452 hci_run(); 6453 return 0; 6454 } 6455 6456 /** 6457 * @brief Auto Connection Establishment - Stop everything 6458 * @note Convenience function to stop all active auto connection attempts 6459 */ 6460 uint8_t gap_auto_connection_stop_all(void){ 6461 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6462 return ERROR_CODE_COMMAND_DISALLOWED; 6463 } 6464 hci_whitelist_clear(); 6465 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6466 hci_run(); 6467 return ERROR_CODE_SUCCESS; 6468 } 6469 6470 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6471 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6472 if (!conn) return 0; 6473 return conn->le_connection_interval; 6474 } 6475 #endif 6476 #endif 6477 6478 #ifdef ENABLE_CLASSIC 6479 /** 6480 * @brief Set Extended Inquiry Response data 6481 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6482 * @note has to be done before stack starts up 6483 */ 6484 void gap_set_extended_inquiry_response(const uint8_t * data){ 6485 hci_stack->eir_data = data; 6486 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6487 hci_run(); 6488 } 6489 6490 /** 6491 * @brief Start GAP Classic Inquiry 6492 * @param duration in 1.28s units 6493 * @return 0 if ok 6494 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6495 */ 6496 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6497 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6498 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6499 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6500 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6501 } 6502 hci_stack->inquiry_state = duration_in_1280ms_units; 6503 hci_run(); 6504 return 0; 6505 } 6506 6507 /** 6508 * @brief Stop GAP Classic Inquiry 6509 * @return 0 if ok 6510 */ 6511 int gap_inquiry_stop(void){ 6512 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6513 // emit inquiry complete event, before it even started 6514 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6515 hci_emit_event(event, sizeof(event), 1); 6516 return 0; 6517 } 6518 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6519 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6520 hci_run(); 6521 return 0; 6522 } 6523 6524 void gap_inquiry_set_lap(uint32_t lap){ 6525 hci_stack->inquiry_lap = lap; 6526 } 6527 6528 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6529 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6530 hci_stack->inquiry_scan_window = inquiry_scan_window; 6531 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6532 hci_run(); 6533 } 6534 6535 6536 /** 6537 * @brief Remote Name Request 6538 * @param addr 6539 * @param page_scan_repetition_mode 6540 * @param clock_offset only used when bit 15 is set 6541 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6542 */ 6543 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6544 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6545 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6546 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6547 hci_stack->remote_name_clock_offset = clock_offset; 6548 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6549 hci_run(); 6550 return 0; 6551 } 6552 6553 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6554 hci_stack->gap_pairing_state = state; 6555 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6556 hci_run(); 6557 return 0; 6558 } 6559 6560 /** 6561 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6562 * @param addr 6563 * @param pin_data 6564 * @param pin_len 6565 * @return 0 if ok 6566 */ 6567 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6568 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6569 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6570 hci_stack->gap_pairing_pin_len = pin_len; 6571 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6572 } 6573 6574 /** 6575 * @brief Legacy Pairing Pin Code Response 6576 * @param addr 6577 * @param pin 6578 * @return 0 if ok 6579 */ 6580 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6581 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6582 } 6583 6584 /** 6585 * @brief Abort Legacy Pairing 6586 * @param addr 6587 * @param pin 6588 * @return 0 if ok 6589 */ 6590 int gap_pin_code_negative(bd_addr_t addr){ 6591 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6592 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6593 } 6594 6595 /** 6596 * @brief SSP Passkey Response 6597 * @param addr 6598 * @param passkey 6599 * @return 0 if ok 6600 */ 6601 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6602 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6603 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6604 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6605 } 6606 6607 /** 6608 * @brief Abort SSP Passkey Entry/Pairing 6609 * @param addr 6610 * @param pin 6611 * @return 0 if ok 6612 */ 6613 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6614 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6615 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6616 } 6617 6618 /** 6619 * @brief Accept SSP Numeric Comparison 6620 * @param addr 6621 * @param passkey 6622 * @return 0 if ok 6623 */ 6624 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6625 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6626 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6627 } 6628 6629 /** 6630 * @brief Abort SSP Numeric Comparison/Pairing 6631 * @param addr 6632 * @param pin 6633 * @return 0 if ok 6634 */ 6635 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6636 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6637 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6638 } 6639 6640 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6641 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6642 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6643 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6644 connectionSetAuthenticationFlags(conn, flag); 6645 hci_run(); 6646 return ERROR_CODE_SUCCESS; 6647 } 6648 #endif 6649 6650 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6651 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6652 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6653 } 6654 6655 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6656 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6657 } 6658 #endif 6659 6660 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6661 /** 6662 * @brief Report Remote OOB Data 6663 * @param bd_addr 6664 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6665 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6666 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6667 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6668 */ 6669 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){ 6670 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6671 if (connection == NULL) { 6672 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6673 } 6674 connection->classic_oob_c_192 = c_192; 6675 connection->classic_oob_r_192 = r_192; 6676 6677 // ignore P-256 if not supported by us 6678 if (hci_stack->secure_connections_active){ 6679 connection->classic_oob_c_256 = c_256; 6680 connection->classic_oob_r_256 = r_256; 6681 } 6682 6683 return ERROR_CODE_SUCCESS; 6684 } 6685 /** 6686 * @brief Generate new OOB data 6687 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6688 */ 6689 void gap_ssp_generate_oob_data(void){ 6690 hci_stack->classic_read_local_oob_data = true; 6691 hci_run(); 6692 } 6693 6694 #endif 6695 6696 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6697 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6698 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6699 if (connection == NULL) { 6700 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6701 } 6702 6703 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6704 connection->link_key_type = type; 6705 6706 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6707 } 6708 6709 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6710 /** 6711 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6712 * @param inquiry_mode see bluetooth_defines.h 6713 */ 6714 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6715 hci_stack->inquiry_mode = inquiry_mode; 6716 } 6717 6718 /** 6719 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6720 */ 6721 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6722 hci_stack->sco_voice_setting = voice_setting; 6723 } 6724 6725 /** 6726 * @brief Get SCO Voice Setting 6727 * @return current voice setting 6728 */ 6729 uint16_t hci_get_sco_voice_setting(void){ 6730 return hci_stack->sco_voice_setting; 6731 } 6732 6733 static int hci_have_usb_transport(void){ 6734 if (!hci_stack->hci_transport) return 0; 6735 const char * transport_name = hci_stack->hci_transport->name; 6736 if (!transport_name) return 0; 6737 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6738 } 6739 6740 /** @brief Get SCO packet length for current SCO Voice setting 6741 * @note Using SCO packets of the exact length is required for USB transfer 6742 * @return Length of SCO packets in bytes (not audio frames) 6743 */ 6744 uint16_t hci_get_sco_packet_length(void){ 6745 uint16_t sco_packet_length = 0; 6746 6747 #ifdef ENABLE_SCO_OVER_HCI 6748 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6749 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6750 6751 if (hci_have_usb_transport()){ 6752 // see Core Spec for H2 USB Transfer. 6753 // 3 byte SCO header + 24 bytes per connection 6754 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6755 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6756 } else { 6757 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6758 sco_packet_length = 3 + 60 * multiplier; 6759 // assert that it still fits inside an SCO buffer 6760 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6761 sco_packet_length = 3 + 60; 6762 } 6763 } 6764 #endif 6765 6766 #ifdef HAVE_SCO_TRANSPORT 6767 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6768 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6769 sco_packet_length = 3 + 60 * multiplier; 6770 #endif 6771 return sco_packet_length; 6772 } 6773 6774 /** 6775 * @brief Sets the master/slave policy 6776 * @param policy (0: attempt to become master, 1: let connecting device decide) 6777 */ 6778 void hci_set_master_slave_policy(uint8_t policy){ 6779 hci_stack->master_slave_policy = policy; 6780 } 6781 6782 #endif 6783 6784 HCI_STATE hci_get_state(void){ 6785 return hci_stack->state; 6786 } 6787 6788 #ifdef ENABLE_CLASSIC 6789 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6790 hci_stack->gap_classic_accept_callback = accept_callback; 6791 } 6792 #endif 6793 6794 /** 6795 * @brief Set callback for Bluetooth Hardware Error 6796 */ 6797 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6798 hci_stack->hardware_error_callback = fn; 6799 } 6800 6801 void hci_disconnect_all(void){ 6802 btstack_linked_list_iterator_t it; 6803 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6804 while (btstack_linked_list_iterator_has_next(&it)){ 6805 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6806 if (con->state == SENT_DISCONNECT) continue; 6807 con->state = SEND_DISCONNECT; 6808 } 6809 hci_run(); 6810 } 6811 6812 uint16_t hci_get_manufacturer(void){ 6813 return hci_stack->manufacturer; 6814 } 6815 6816 #ifdef ENABLE_BLE 6817 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6818 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6819 if (!hci_con) return NULL; 6820 return &hci_con->sm_connection; 6821 } 6822 6823 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6824 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6825 #endif 6826 6827 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 6828 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6829 if (hci_connection == NULL) return 0; 6830 if (hci_is_le_connection(hci_connection)){ 6831 #ifdef ENABLE_BLE 6832 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6833 if (sm_conn->sm_connection_encrypted) { 6834 return sm_conn->sm_actual_encryption_key_size; 6835 } 6836 #endif 6837 } else { 6838 #ifdef ENABLE_CLASSIC 6839 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6840 return hci_connection->encryption_key_size; 6841 } 6842 #endif 6843 } 6844 return 0; 6845 } 6846 6847 bool gap_authenticated(hci_con_handle_t con_handle){ 6848 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6849 if (hci_connection == NULL) return false; 6850 6851 switch (hci_connection->address_type){ 6852 #ifdef ENABLE_BLE 6853 case BD_ADDR_TYPE_LE_PUBLIC: 6854 case BD_ADDR_TYPE_LE_RANDOM: 6855 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6856 return hci_connection->sm_connection.sm_connection_authenticated != 0; 6857 #endif 6858 #ifdef ENABLE_CLASSIC 6859 case BD_ADDR_TYPE_SCO: 6860 case BD_ADDR_TYPE_ACL: 6861 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6862 #endif 6863 default: 6864 return false; 6865 } 6866 } 6867 6868 bool gap_secure_connection(hci_con_handle_t con_handle){ 6869 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6870 if (hci_connection == NULL) return 0; 6871 6872 switch (hci_connection->address_type){ 6873 #ifdef ENABLE_BLE 6874 case BD_ADDR_TYPE_LE_PUBLIC: 6875 case BD_ADDR_TYPE_LE_RANDOM: 6876 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 6877 return hci_connection->sm_connection.sm_connection_sc != 0; 6878 #endif 6879 #ifdef ENABLE_CLASSIC 6880 case BD_ADDR_TYPE_SCO: 6881 case BD_ADDR_TYPE_ACL: 6882 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6883 #endif 6884 default: 6885 return false; 6886 } 6887 } 6888 6889 bool gap_bonded(hci_con_handle_t con_handle){ 6890 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6891 if (hci_connection == NULL) return 0; 6892 6893 #ifdef ENABLE_CLASSIC 6894 link_key_t link_key; 6895 link_key_type_t link_key_type; 6896 #endif 6897 switch (hci_connection->address_type){ 6898 #ifdef ENABLE_BLE 6899 case BD_ADDR_TYPE_LE_PUBLIC: 6900 case BD_ADDR_TYPE_LE_RANDOM: 6901 return hci_connection->sm_connection.sm_le_db_index >= 0; 6902 #endif 6903 #ifdef ENABLE_CLASSIC 6904 case BD_ADDR_TYPE_SCO: 6905 case BD_ADDR_TYPE_ACL: 6906 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6907 #endif 6908 default: 6909 return false; 6910 } 6911 } 6912 6913 #ifdef ENABLE_BLE 6914 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6915 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6916 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6917 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6918 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6919 return sm_conn->sm_connection_authorization_state; 6920 } 6921 #endif 6922 6923 #ifdef ENABLE_CLASSIC 6924 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){ 6925 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6926 if (!conn) return GAP_CONNECTION_INVALID; 6927 conn->sniff_min_interval = sniff_min_interval; 6928 conn->sniff_max_interval = sniff_max_interval; 6929 conn->sniff_attempt = sniff_attempt; 6930 conn->sniff_timeout = sniff_timeout; 6931 hci_run(); 6932 return 0; 6933 } 6934 6935 /** 6936 * @brief Exit Sniff mode 6937 * @param con_handle 6938 @ @return 0 if ok 6939 */ 6940 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6941 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6942 if (!conn) return GAP_CONNECTION_INVALID; 6943 conn->sniff_min_interval = 0xffff; 6944 hci_run(); 6945 return 0; 6946 } 6947 6948 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){ 6949 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6950 if (!conn) return GAP_CONNECTION_INVALID; 6951 conn->sniff_subrating_max_latency = max_latency; 6952 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6953 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6954 hci_run(); 6955 return ERROR_CODE_SUCCESS; 6956 } 6957 6958 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){ 6959 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6960 if (!conn) return GAP_CONNECTION_INVALID; 6961 conn->qos_service_type = service_type; 6962 conn->qos_token_rate = token_rate; 6963 conn->qos_peak_bandwidth = peak_bandwidth; 6964 conn->qos_latency = latency; 6965 conn->qos_delay_variation = delay_variation; 6966 hci_run(); 6967 return ERROR_CODE_SUCCESS; 6968 } 6969 6970 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6971 hci_stack->new_page_scan_interval = page_scan_interval; 6972 hci_stack->new_page_scan_window = page_scan_window; 6973 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6974 hci_run(); 6975 } 6976 6977 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6978 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6979 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6980 hci_run(); 6981 } 6982 6983 void gap_set_page_timeout(uint16_t page_timeout){ 6984 hci_stack->page_timeout = page_timeout; 6985 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 6986 hci_run(); 6987 } 6988 6989 #endif 6990 6991 void hci_halting_defer(void){ 6992 if (hci_stack->state != HCI_STATE_HALTING) return; 6993 switch (hci_stack->substate){ 6994 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6995 case HCI_HALTING_CLOSE: 6996 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6997 break; 6998 default: 6999 break; 7000 } 7001 } 7002 7003 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7004 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7005 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7006 if (le_device_db_index >= le_device_db_max_count()) return; 7007 uint8_t offset = le_device_db_index >> 3; 7008 uint8_t mask = 1 << (le_device_db_index & 7); 7009 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7010 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7011 // note: go back to remove entries, otherwise, a remove + add will skip the add 7012 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7013 } 7014 } 7015 7016 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7017 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7018 if (le_device_db_index >= le_device_db_max_count()) return; 7019 uint8_t offset = le_device_db_index >> 3; 7020 uint8_t mask = 1 << (le_device_db_index & 7); 7021 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7022 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7023 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7024 } 7025 } 7026 7027 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7028 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 7029 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7030 } 7031 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7032 // restart le resolving list update 7033 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7034 } 7035 return ERROR_CODE_SUCCESS; 7036 } 7037 #endif 7038 7039 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7040 void hci_setup_test_connections_fuzz(void){ 7041 hci_connection_t * conn; 7042 7043 // default address: 66:55:44:33:00:01 7044 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7045 7046 // setup Controller info 7047 hci_stack->num_cmd_packets = 255; 7048 hci_stack->acl_packets_total_num = 255; 7049 7050 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7051 addr[5] = 0x01; 7052 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7053 conn->con_handle = addr[5]; 7054 conn->role = HCI_ROLE_SLAVE; 7055 conn->state = RECEIVED_CONNECTION_REQUEST; 7056 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7057 7058 // setup incoming Classic SCO connection with con handle 0x0002 7059 addr[5] = 0x02; 7060 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7061 conn->con_handle = addr[5]; 7062 conn->role = HCI_ROLE_SLAVE; 7063 conn->state = RECEIVED_CONNECTION_REQUEST; 7064 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7065 7066 // setup ready Classic ACL connection with con handle 0x0003 7067 addr[5] = 0x03; 7068 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7069 conn->con_handle = addr[5]; 7070 conn->role = HCI_ROLE_SLAVE; 7071 conn->state = OPEN; 7072 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7073 7074 // setup ready Classic SCO connection with con handle 0x0004 7075 addr[5] = 0x04; 7076 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7077 conn->con_handle = addr[5]; 7078 conn->role = HCI_ROLE_SLAVE; 7079 conn->state = OPEN; 7080 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7081 7082 // setup ready LE ACL connection with con handle 0x005 and public address 7083 addr[5] = 0x05; 7084 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7085 conn->con_handle = addr[5]; 7086 conn->role = HCI_ROLE_SLAVE; 7087 conn->state = OPEN; 7088 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7089 conn->sm_connection.sm_connection_encrypted = 1; 7090 } 7091 7092 void hci_free_connections_fuzz(void){ 7093 btstack_linked_list_iterator_t it; 7094 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7095 while (btstack_linked_list_iterator_has_next(&it)){ 7096 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7097 btstack_linked_list_iterator_remove(&it); 7098 btstack_memory_hci_connection_free(con); 7099 } 7100 } 7101 void hci_simulate_working_fuzz(void){ 7102 hci_init_done(); 7103 hci_stack->num_cmd_packets = 255; 7104 } 7105 #endif 7106