1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // 136 // compact storage of relevant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into the supported 138 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 139 // 140 141 // format: command name, byte offset, bit nr in 64-byte supported commands 142 #define SUPPORTED_HCI_COMMANDS \ 143 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 144 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 145 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 146 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 147 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 148 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 149 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 151 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 152 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 153 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 154 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 156 157 // 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 static bool hci_command_supported(uint8_t command_index){ 1207 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1208 } 1209 1210 #ifdef ENABLE_BLE 1211 1212 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1213 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1214 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1215 } else { 1216 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1217 } 1218 } 1219 1220 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1221 *addr_type = hci_stack->le_own_addr_type; 1222 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1223 } 1224 1225 #ifdef ENABLE_LE_PERIPHERAL 1226 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1227 *addr_type = hci_stack->le_advertisements_own_addr_type; 1228 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1229 }; 1230 #endif 1231 1232 #ifdef ENABLE_LE_CENTRAL 1233 1234 /** 1235 * @brief Get own addr type and address used for LE connections (Central) 1236 */ 1237 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1238 *addr_type = hci_stack->le_connection_own_addr_type; 1239 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1240 } 1241 1242 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1243 1244 int offset = 3; 1245 int num_reports = packet[offset]; 1246 offset += 1; 1247 1248 int i; 1249 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1250 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1251 for (i=0; (i<num_reports) && (offset < size);i++){ 1252 // sanity checks on data_length: 1253 uint8_t data_length = packet[offset + 8]; 1254 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1255 if ((offset + 9u + data_length + 1u) > size) return; 1256 // setup event 1257 uint8_t event_size = 10u + data_length; 1258 int pos = 0; 1259 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1260 event[pos++] = event_size; 1261 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1262 offset += 8; 1263 pos += 8; 1264 event[pos++] = packet[offset + 1 + data_length]; // rssi 1265 event[pos++] = data_length; 1266 offset++; 1267 (void)memcpy(&event[pos], &packet[offset], data_length); 1268 pos += data_length; 1269 offset += data_length + 1u; // rssi 1270 hci_emit_event(event, pos, 1); 1271 } 1272 } 1273 #endif 1274 #endif 1275 1276 #ifdef ENABLE_BLE 1277 #ifdef ENABLE_LE_PERIPHERAL 1278 static void hci_update_advertisements_enabled_for_current_roles(void){ 1279 if (hci_stack->le_advertisements_enabled){ 1280 // get number of active le slave connections 1281 int num_slave_connections = 0; 1282 btstack_linked_list_iterator_t it; 1283 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1284 while (btstack_linked_list_iterator_has_next(&it)){ 1285 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1286 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1287 if (con->state != OPEN) continue; 1288 if (con->role != HCI_ROLE_SLAVE) continue; 1289 if (!hci_is_le_connection(con)) continue; 1290 num_slave_connections++; 1291 } 1292 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1293 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1294 } else { 1295 hci_stack->le_advertisements_enabled_for_current_roles = false; 1296 } 1297 } 1298 #endif 1299 #endif 1300 1301 #ifdef ENABLE_CLASSIC 1302 static void gap_run_set_local_name(void){ 1303 hci_reserve_packet_buffer(); 1304 uint8_t * packet = hci_stack->hci_packet_buffer; 1305 // construct HCI Command and send 1306 uint16_t opcode = hci_write_local_name.opcode; 1307 hci_stack->last_cmd_opcode = opcode; 1308 packet[0] = opcode & 0xff; 1309 packet[1] = opcode >> 8; 1310 packet[2] = DEVICE_NAME_LEN; 1311 memset(&packet[3], 0, DEVICE_NAME_LEN); 1312 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1313 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1314 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1315 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1316 // expand '00:00:00:00:00:00' in name with bd_addr 1317 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1318 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1319 } 1320 1321 static void gap_run_set_eir_data(void){ 1322 hci_reserve_packet_buffer(); 1323 uint8_t * packet = hci_stack->hci_packet_buffer; 1324 // construct HCI Command in-place and send 1325 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1326 hci_stack->last_cmd_opcode = opcode; 1327 uint16_t offset = 0; 1328 packet[offset++] = opcode & 0xff; 1329 packet[offset++] = opcode >> 8; 1330 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1331 packet[offset++] = 0; // FEC not required 1332 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1333 if (hci_stack->eir_data){ 1334 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1335 ad_context_t context; 1336 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1337 uint8_t data_type = ad_iterator_get_data_type(&context); 1338 uint8_t size = ad_iterator_get_data_len(&context); 1339 const uint8_t *data = ad_iterator_get_data(&context); 1340 // copy item 1341 packet[offset++] = size + 1; 1342 packet[offset++] = data_type; 1343 memcpy(&packet[offset], data, size); 1344 // update name item 1345 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1346 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1347 } 1348 offset += size; 1349 } 1350 } else { 1351 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1352 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1353 packet[offset++] = bytes_to_copy + 1; 1354 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1355 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1356 // expand '00:00:00:00:00:00' in name with bd_addr 1357 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1358 } 1359 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1360 } 1361 1362 static void hci_run_gap_tasks_classic(void){ 1363 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1364 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1365 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1366 return; 1367 } 1368 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1369 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1370 gap_run_set_local_name(); 1371 return; 1372 } 1373 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1374 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1375 gap_run_set_eir_data(); 1376 return; 1377 } 1378 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1379 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1380 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1381 return; 1382 } 1383 // write page scan activity 1384 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1385 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1386 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1387 return; 1388 } 1389 // write page scan type 1390 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1391 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1392 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1393 return; 1394 } 1395 // write page timeout 1396 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1397 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1398 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1399 return; 1400 } 1401 // send scan enable 1402 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1403 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1404 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1405 return; 1406 } 1407 // send write scan activity 1408 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1409 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1410 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1411 return; 1412 } 1413 } 1414 #endif 1415 1416 #ifndef HAVE_HOST_CONTROLLER_API 1417 1418 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1419 if (!hci_stack->config) return 0; 1420 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1421 // Limit baud rate for Broadcom chipsets to 3 mbps 1422 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1423 baud_rate = 3000000; 1424 } 1425 return baud_rate; 1426 } 1427 1428 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1429 UNUSED(ds); 1430 1431 switch (hci_stack->substate){ 1432 case HCI_INIT_W4_SEND_RESET: 1433 log_info("Resend HCI Reset"); 1434 hci_stack->substate = HCI_INIT_SEND_RESET; 1435 hci_stack->num_cmd_packets = 1; 1436 hci_run(); 1437 break; 1438 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1439 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1440 if (hci_stack->hci_transport->reset_link){ 1441 hci_stack->hci_transport->reset_link(); 1442 } 1443 1444 /* fall through */ 1445 1446 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1447 log_info("Resend HCI Reset - CSR Warm Boot"); 1448 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1449 hci_stack->num_cmd_packets = 1; 1450 hci_run(); 1451 break; 1452 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1453 if (hci_stack->hci_transport->set_baudrate){ 1454 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1455 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1456 hci_stack->hci_transport->set_baudrate(baud_rate); 1457 } 1458 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1459 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1460 if (hci_stack->hci_transport->reset_link){ 1461 log_info("Link Reset"); 1462 hci_stack->hci_transport->reset_link(); 1463 } 1464 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1465 hci_run(); 1466 } 1467 break; 1468 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1469 // otherwise continue 1470 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1471 hci_send_cmd(&hci_read_local_supported_commands); 1472 break; 1473 default: 1474 break; 1475 } 1476 } 1477 #endif 1478 1479 static void hci_initializing_next_state(void){ 1480 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1481 } 1482 1483 static void hci_init_done(void){ 1484 // done. tell the app 1485 log_info("hci_init_done -> HCI_STATE_WORKING"); 1486 hci_stack->state = HCI_STATE_WORKING; 1487 hci_emit_state(); 1488 } 1489 1490 // assumption: hci_can_send_command_packet_now() == true 1491 static void hci_initializing_run(void){ 1492 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1493 1494 if (!hci_can_send_command_packet_now()) return; 1495 1496 #ifndef HAVE_HOST_CONTROLLER_API 1497 bool need_baud_change = hci_stack->config 1498 && hci_stack->chipset 1499 && hci_stack->chipset->set_baudrate_command 1500 && hci_stack->hci_transport->set_baudrate 1501 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1502 #endif 1503 1504 switch (hci_stack->substate){ 1505 case HCI_INIT_SEND_RESET: 1506 hci_state_reset(); 1507 1508 #ifndef HAVE_HOST_CONTROLLER_API 1509 // prepare reset if command complete not received in 100ms 1510 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1511 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1512 btstack_run_loop_add_timer(&hci_stack->timeout); 1513 #endif 1514 // send command 1515 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1516 hci_send_cmd(&hci_reset); 1517 break; 1518 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1519 hci_send_cmd(&hci_read_local_version_information); 1520 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1521 break; 1522 1523 #ifndef HAVE_HOST_CONTROLLER_API 1524 case HCI_INIT_SEND_READ_LOCAL_NAME: 1525 hci_send_cmd(&hci_read_local_name); 1526 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1527 break; 1528 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1529 hci_state_reset(); 1530 // prepare reset if command complete not received in 100ms 1531 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1532 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1533 btstack_run_loop_add_timer(&hci_stack->timeout); 1534 // send command 1535 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1536 hci_send_cmd(&hci_reset); 1537 break; 1538 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1539 hci_state_reset(); 1540 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1541 hci_send_cmd(&hci_reset); 1542 break; 1543 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1544 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1545 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1546 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1547 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1548 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1549 break; 1550 } 1551 case HCI_INIT_SET_BD_ADDR: 1552 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1553 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1554 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1555 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1556 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1557 break; 1558 case HCI_INIT_SEND_BAUD_CHANGE: 1559 if (need_baud_change) { 1560 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1561 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1562 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1563 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1564 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1565 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1566 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1567 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1568 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1569 btstack_run_loop_add_timer(&hci_stack->timeout); 1570 } 1571 break; 1572 } 1573 1574 /* fall through */ 1575 1576 case HCI_INIT_CUSTOM_INIT: 1577 // Custom initialization 1578 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1579 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1580 bool send_cmd = false; 1581 switch (hci_stack->chipset_result){ 1582 case BTSTACK_CHIPSET_VALID_COMMAND: 1583 send_cmd = true; 1584 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1585 break; 1586 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1587 send_cmd = true; 1588 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1589 log_info("CSR Warm Boot"); 1590 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1591 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1592 btstack_run_loop_add_timer(&hci_stack->timeout); 1593 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1594 && hci_stack->config 1595 && hci_stack->chipset 1596 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1597 && hci_stack->hci_transport->set_baudrate 1598 && hci_transport_uart_get_main_baud_rate()){ 1599 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1600 } else { 1601 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1602 } 1603 break; 1604 default: 1605 break; 1606 } 1607 1608 if (send_cmd){ 1609 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1610 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1611 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1612 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1613 break; 1614 } 1615 log_info("Init script done"); 1616 1617 // Init script download on Broadcom chipsets causes: 1618 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1619 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1620 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1621 1622 // - baud rate to reset, restore UART baud rate if needed 1623 if (need_baud_change) { 1624 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1625 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1626 hci_stack->hci_transport->set_baudrate(baud_rate); 1627 } 1628 1629 uint16_t bcm_delay_ms = 300; 1630 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1631 // -> Work around: wait here. 1632 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1633 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1634 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1635 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1636 btstack_run_loop_add_timer(&hci_stack->timeout); 1637 break; 1638 } 1639 } 1640 #endif 1641 /* fall through */ 1642 1643 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1644 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1645 hci_send_cmd(&hci_read_local_supported_commands); 1646 break; 1647 case HCI_INIT_READ_BD_ADDR: 1648 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1649 hci_send_cmd(&hci_read_bd_addr); 1650 break; 1651 case HCI_INIT_READ_BUFFER_SIZE: 1652 // only read buffer size if supported 1653 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1654 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1655 hci_send_cmd(&hci_read_buffer_size); 1656 break; 1657 } 1658 1659 /* fall through */ 1660 1661 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1662 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1663 hci_send_cmd(&hci_read_local_supported_features); 1664 break; 1665 1666 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1667 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1668 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1669 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1670 break; 1671 case HCI_INIT_HOST_BUFFER_SIZE: 1672 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1673 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1674 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1675 break; 1676 #endif 1677 1678 case HCI_INIT_SET_EVENT_MASK: 1679 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1680 if (hci_le_supported()){ 1681 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1682 } else { 1683 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1684 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1685 } 1686 break; 1687 1688 #ifdef ENABLE_CLASSIC 1689 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1690 if (hci_classic_supported() && gap_ssp_supported()){ 1691 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1692 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1693 break; 1694 } 1695 1696 /* fall through */ 1697 1698 case HCI_INIT_WRITE_INQUIRY_MODE: 1699 if (hci_classic_supported()){ 1700 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1701 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1702 break; 1703 } 1704 1705 /* fall through */ 1706 1707 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1708 // skip write secure connections host support if not supported or disabled 1709 if (hci_classic_supported() && hci_stack->secure_connections_enable 1710 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1711 hci_stack->secure_connections_active = true; 1712 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1713 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1714 break; 1715 } 1716 1717 #ifdef ENABLE_SCO_OVER_HCI 1718 /* fall through */ 1719 1720 // only sent if ENABLE_SCO_OVER_HCI is defined 1721 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1722 // skip write synchronous flow control if not supported 1723 if (hci_classic_supported() 1724 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1725 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1726 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1727 break; 1728 } 1729 /* fall through */ 1730 1731 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1732 // skip write default erroneous data reporting if not supported 1733 if (hci_classic_supported() 1734 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1735 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1736 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1737 break; 1738 } 1739 #endif 1740 1741 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1742 /* fall through */ 1743 1744 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1745 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1746 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1747 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1748 #ifdef ENABLE_SCO_OVER_HCI 1749 log_info("BCM: Route SCO data via HCI transport"); 1750 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1751 #endif 1752 #ifdef ENABLE_SCO_OVER_PCM 1753 log_info("BCM: Route SCO data via PCM interface"); 1754 #ifdef ENABLE_BCM_PCM_WBS 1755 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1756 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1757 #else 1758 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1759 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1760 #endif 1761 #endif 1762 break; 1763 } 1764 #endif 1765 1766 #ifdef ENABLE_SCO_OVER_PCM 1767 /* fall through */ 1768 1769 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1770 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1771 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1772 log_info("BCM: Config PCM interface for I2S"); 1773 #ifdef ENABLE_BCM_PCM_WBS 1774 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1775 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1776 #else 1777 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1778 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1779 #endif 1780 break; 1781 } 1782 #endif 1783 #endif 1784 1785 #ifdef ENABLE_BLE 1786 /* fall through */ 1787 1788 // LE INIT 1789 case HCI_INIT_LE_READ_BUFFER_SIZE: 1790 if (hci_le_supported()){ 1791 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1792 hci_send_cmd(&hci_le_read_buffer_size); 1793 break; 1794 } 1795 1796 /* fall through */ 1797 1798 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1799 // skip write le host if not supported (e.g. on LE only EM9301) 1800 if (hci_le_supported() 1801 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1802 // LE Supported Host = 1, Simultaneous Host = 0 1803 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1804 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1805 break; 1806 } 1807 1808 /* fall through */ 1809 1810 case HCI_INIT_LE_SET_EVENT_MASK: 1811 if (hci_le_supported()){ 1812 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1813 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1814 break; 1815 } 1816 #endif 1817 1818 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1819 /* fall through */ 1820 1821 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1822 if (hci_le_supported() 1823 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1824 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1825 hci_send_cmd(&hci_le_read_maximum_data_length); 1826 break; 1827 } 1828 1829 /* fall through */ 1830 1831 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1832 if (hci_le_supported() 1833 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1834 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1835 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1836 break; 1837 } 1838 #endif 1839 1840 #ifdef ENABLE_LE_CENTRAL 1841 /* fall through */ 1842 1843 case HCI_INIT_READ_WHITE_LIST_SIZE: 1844 if (hci_le_supported()){ 1845 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1846 hci_send_cmd(&hci_le_read_white_list_size); 1847 break; 1848 } 1849 1850 #endif 1851 1852 /* fall through */ 1853 1854 case HCI_INIT_DONE: 1855 hci_stack->substate = HCI_INIT_DONE; 1856 // main init sequence complete 1857 #ifdef ENABLE_CLASSIC 1858 // check if initial Classic GAP Tasks are completed 1859 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1860 hci_run_gap_tasks_classic(); 1861 break; 1862 } 1863 #endif 1864 #ifdef ENABLE_BLE 1865 #ifdef ENABLE_LE_CENTRAL 1866 // check if initial LE GAP Tasks are completed 1867 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1868 hci_run_general_gap_le(); 1869 break; 1870 } 1871 #endif 1872 #endif 1873 hci_init_done(); 1874 break; 1875 1876 default: 1877 return; 1878 } 1879 } 1880 1881 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1882 bool command_completed = false; 1883 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1884 uint16_t opcode = little_endian_read_16(packet,3); 1885 if (opcode == hci_stack->last_cmd_opcode){ 1886 command_completed = true; 1887 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1888 } else { 1889 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1890 } 1891 } 1892 1893 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1894 uint8_t status = packet[2]; 1895 uint16_t opcode = little_endian_read_16(packet,4); 1896 if (opcode == hci_stack->last_cmd_opcode){ 1897 if (status){ 1898 command_completed = true; 1899 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1900 } else { 1901 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1902 } 1903 } else { 1904 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1905 } 1906 } 1907 #ifndef HAVE_HOST_CONTROLLER_API 1908 // Vendor == CSR 1909 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1910 // TODO: track actual command 1911 command_completed = true; 1912 } 1913 1914 // Vendor == Toshiba 1915 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1916 // TODO: track actual command 1917 command_completed = true; 1918 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1919 hci_stack->num_cmd_packets = 1; 1920 } 1921 #endif 1922 1923 return command_completed; 1924 } 1925 1926 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1927 1928 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1929 1930 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1931 1932 #ifndef HAVE_HOST_CONTROLLER_API 1933 1934 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1935 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1936 // 1937 // HCI Reset 1938 // Timeout 100 ms 1939 // HCI Reset 1940 // Command Complete Reset 1941 // HCI Read Local Version Information 1942 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1943 // hang... 1944 // 1945 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1946 if (!command_completed 1947 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1948 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1949 1950 uint16_t opcode = little_endian_read_16(packet,3); 1951 if (opcode == hci_reset.opcode){ 1952 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1953 return; 1954 } 1955 } 1956 1957 // CSR & H5 1958 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1959 if (!command_completed 1960 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1961 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1962 1963 uint16_t opcode = little_endian_read_16(packet,3); 1964 if (opcode == hci_reset.opcode){ 1965 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1966 return; 1967 } 1968 } 1969 1970 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1971 // fix: Correct substate and behave as command below 1972 if (command_completed){ 1973 switch (hci_stack->substate){ 1974 case HCI_INIT_SEND_RESET: 1975 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1976 break; 1977 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1978 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1979 break; 1980 default: 1981 break; 1982 } 1983 } 1984 1985 #endif 1986 1987 if (!command_completed) return; 1988 1989 bool need_baud_change = false; 1990 bool need_addr_change = false; 1991 1992 #ifndef HAVE_HOST_CONTROLLER_API 1993 need_baud_change = hci_stack->config 1994 && hci_stack->chipset 1995 && hci_stack->chipset->set_baudrate_command 1996 && hci_stack->hci_transport->set_baudrate 1997 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1998 1999 need_addr_change = hci_stack->custom_bd_addr_set 2000 && hci_stack->chipset 2001 && hci_stack->chipset->set_bd_addr_command; 2002 #endif 2003 2004 switch(hci_stack->substate){ 2005 2006 #ifndef HAVE_HOST_CONTROLLER_API 2007 case HCI_INIT_SEND_RESET: 2008 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2009 // fix: just correct substate and behave as command below 2010 2011 /* fall through */ 2012 #endif 2013 2014 case HCI_INIT_W4_SEND_RESET: 2015 btstack_run_loop_remove_timer(&hci_stack->timeout); 2016 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2017 return; 2018 2019 #ifndef HAVE_HOST_CONTROLLER_API 2020 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2021 // for STLC2500D, baud rate change already happened. 2022 // for others, baud rate gets changed now 2023 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2024 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2025 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2026 hci_stack->hci_transport->set_baudrate(baud_rate); 2027 } 2028 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2029 return; 2030 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2031 btstack_run_loop_remove_timer(&hci_stack->timeout); 2032 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2033 return; 2034 case HCI_INIT_W4_CUSTOM_INIT: 2035 // repeat custom init 2036 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2037 return; 2038 #endif 2039 2040 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2041 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2042 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2043 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2044 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2045 return; 2046 } 2047 if (need_addr_change){ 2048 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2049 return; 2050 } 2051 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2052 return; 2053 #ifndef HAVE_HOST_CONTROLLER_API 2054 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2055 if (need_baud_change){ 2056 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2057 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2058 hci_stack->hci_transport->set_baudrate(baud_rate); 2059 } 2060 if (need_addr_change){ 2061 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2062 return; 2063 } 2064 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2065 return; 2066 case HCI_INIT_W4_SET_BD_ADDR: 2067 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2068 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2069 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2070 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2071 return; 2072 } 2073 // skipping st warm boot 2074 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2075 return; 2076 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2077 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2078 return; 2079 #endif 2080 2081 case HCI_INIT_DONE: 2082 // set state if we came here by fall through 2083 hci_stack->substate = HCI_INIT_DONE; 2084 return; 2085 2086 default: 2087 break; 2088 } 2089 hci_initializing_next_state(); 2090 } 2091 2092 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2093 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2094 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2095 // check if the hci connection has been outgoing 2096 switch (conn->state){ 2097 case SEND_CREATE_CONNECTION: 2098 case RECEIVED_CONNECTION_REQUEST: 2099 break; 2100 default: 2101 return; 2102 } 2103 2104 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2105 bd_addr_t bd_address; 2106 (void)memcpy(&bd_address, conn->address, 6); 2107 2108 #ifdef ENABLE_CLASSIC 2109 // cache needed data 2110 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2111 #endif 2112 2113 // connection failed, remove entry 2114 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2115 btstack_memory_hci_connection_free( conn ); 2116 2117 #ifdef ENABLE_CLASSIC 2118 // notify client if dedicated bonding 2119 if (notify_dedicated_bonding_failed){ 2120 log_info("hci notify_dedicated_bonding_failed"); 2121 hci_emit_dedicated_bonding_result(bd_address, status); 2122 } 2123 2124 // if authentication error, also delete link key 2125 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2126 gap_drop_link_key_for_bd_addr(bd_address); 2127 } 2128 #else 2129 UNUSED(status); 2130 #endif 2131 } 2132 2133 #ifdef ENABLE_CLASSIC 2134 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2135 // SSP Controller 2136 if (features[6] & (1 << 3)){ 2137 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2138 } 2139 // eSCO 2140 if (features[3] & (1<<7)){ 2141 conn->remote_supported_features[0] |= 1; 2142 } 2143 // Extended features 2144 if (features[7] & (1<<7)){ 2145 conn->remote_supported_features[0] |= 2; 2146 } 2147 } 2148 2149 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2150 // SSP Host 2151 if (features[0] & (1 << 0)){ 2152 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2153 } 2154 // SC Host 2155 if (features[0] & (1 << 3)){ 2156 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2157 } 2158 } 2159 2160 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2161 // SC Controller 2162 if (features[1] & (1 << 0)){ 2163 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2164 } 2165 } 2166 2167 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2168 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2169 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2170 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2171 if (conn->bonding_flags & BONDING_DEDICATED){ 2172 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2173 } 2174 } 2175 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2176 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2177 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2178 } 2179 2180 #endif 2181 2182 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2183 // handle BT initialization 2184 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2185 hci_initializing_event_handler(packet, size); 2186 } 2187 2188 // help with BT sleep 2189 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2190 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2191 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2192 hci_initializing_next_state(); 2193 } 2194 } 2195 2196 #ifdef ENABLE_CLASSIC 2197 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2198 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2199 conn->encryption_key_size = encryption_key_size; 2200 2201 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2202 conn->requested_security_level = LEVEL_0; 2203 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2204 return; 2205 } 2206 2207 // Request remote features if not already done 2208 hci_trigger_remote_features_for_connection(conn); 2209 2210 // Request Authentication if not already done 2211 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2212 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2213 } 2214 #endif 2215 2216 static void hci_store_local_supported_commands(const uint8_t * packet){ 2217 // create mapping table 2218 #define X(name, offset, bit) { offset, bit }, 2219 static struct { 2220 uint8_t byte_offset; 2221 uint8_t bit_position; 2222 } supported_hci_commands_map [] = { 2223 SUPPORTED_HCI_COMMANDS 2224 }; 2225 #undef X 2226 2227 // create names for debug purposes 2228 #ifdef ENABLE_LOG_DEBUG 2229 #define X(name, offset, bit) #name, 2230 static const char * command_names[] = { 2231 SUPPORTED_HCI_COMMANDS 2232 }; 2233 #undef X 2234 #endif 2235 2236 hci_stack->local_supported_commands = 0; 2237 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2238 uint16_t i; 2239 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2240 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2241 #ifdef ENABLE_LOG_DEBUG 2242 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); 2243 #else 2244 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2245 #endif 2246 hci_stack->local_supported_commands |= (1LU << i); 2247 } 2248 } 2249 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2250 } 2251 2252 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2253 UNUSED(size); 2254 2255 uint16_t manufacturer; 2256 #ifdef ENABLE_CLASSIC 2257 hci_con_handle_t handle; 2258 hci_connection_t * conn; 2259 uint8_t status; 2260 #endif 2261 // get num cmd packets - limit to 1 to reduce complexity 2262 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2263 2264 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2265 switch (opcode){ 2266 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2267 if (packet[5]) break; 2268 // terminate, name 248 chars 2269 packet[6+248] = 0; 2270 log_info("local name: %s", &packet[6]); 2271 break; 2272 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2273 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2274 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2275 uint16_t acl_len = little_endian_read_16(packet, 6); 2276 uint16_t sco_len = packet[8]; 2277 2278 // determine usable ACL/SCO payload size 2279 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2280 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2281 2282 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2283 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2284 2285 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2286 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2287 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2288 } 2289 break; 2290 case HCI_OPCODE_HCI_READ_RSSI: 2291 if (packet[5] == ERROR_CODE_SUCCESS){ 2292 uint8_t event[5]; 2293 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2294 event[1] = 3; 2295 (void)memcpy(&event[2], &packet[6], 3); 2296 hci_emit_event(event, sizeof(event), 1); 2297 } 2298 break; 2299 #ifdef ENABLE_BLE 2300 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2301 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2302 hci_stack->le_acl_packets_total_num = packet[8]; 2303 // determine usable ACL payload size 2304 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2305 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2306 } 2307 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2308 break; 2309 #endif 2310 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2311 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2312 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2313 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2314 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); 2315 break; 2316 #endif 2317 #ifdef ENABLE_LE_CENTRAL 2318 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2319 hci_stack->le_whitelist_capacity = packet[6]; 2320 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2321 break; 2322 #endif 2323 case HCI_OPCODE_HCI_READ_BD_ADDR: 2324 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2325 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)); 2326 #ifdef ENABLE_CLASSIC 2327 if (hci_stack->link_key_db){ 2328 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2329 } 2330 #endif 2331 break; 2332 #ifdef ENABLE_CLASSIC 2333 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2334 hci_emit_discoverable_enabled(hci_stack->discoverable); 2335 break; 2336 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2337 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2338 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2339 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2340 hci_emit_event(event, sizeof(event), 1); 2341 } 2342 break; 2343 #endif 2344 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2345 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2346 2347 #ifdef ENABLE_CLASSIC 2348 // determine usable ACL packet types based on host buffer size and supported features 2349 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2350 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2351 #endif 2352 // Classic/LE 2353 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2354 break; 2355 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2356 manufacturer = little_endian_read_16(packet, 10); 2357 // map Cypress to Broadcom 2358 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2359 log_info("Treat Cypress as Broadcom"); 2360 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2361 little_endian_store_16(packet, 10, manufacturer); 2362 } 2363 hci_stack->manufacturer = manufacturer; 2364 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2365 break; 2366 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2367 hci_store_local_supported_commands(packet); 2368 break; 2369 #ifdef ENABLE_CLASSIC 2370 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2371 if (packet[5]) return; 2372 hci_stack->synchronous_flow_control_enabled = 1; 2373 break; 2374 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2375 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2376 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2377 conn = hci_connection_for_handle(handle); 2378 if (conn != NULL) { 2379 uint8_t key_size = 0; 2380 if (status == 0){ 2381 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2382 log_info("Handle %04x key Size: %u", handle, key_size); 2383 } else { 2384 key_size = 1; 2385 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2386 } 2387 hci_handle_read_encryption_key_size_complete(conn, key_size); 2388 } 2389 break; 2390 // assert pairing complete event is emitted. 2391 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2392 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2393 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2394 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2395 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2396 // lookup connection by gap pairing addr 2397 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2398 if (conn == NULL) break; 2399 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2400 break; 2401 2402 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2403 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2404 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2405 uint8_t event[67]; 2406 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2407 event[1] = 65; 2408 (void)memset(&event[2], 0, 65); 2409 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2410 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2411 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2412 event[2] = 3; 2413 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2414 } else { 2415 event[2] = 1; 2416 } 2417 } 2418 hci_emit_event(event, sizeof(event), 0); 2419 break; 2420 } 2421 2422 // note: only needed if user does not provide OOB data 2423 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2424 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2425 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2426 if (conn == NULL) break; 2427 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2428 break; 2429 #endif 2430 #endif 2431 default: 2432 break; 2433 } 2434 } 2435 2436 #ifdef ENABLE_BLE 2437 static void event_handle_le_connection_complete(const uint8_t * packet){ 2438 bd_addr_t addr; 2439 bd_addr_type_t addr_type; 2440 hci_connection_t * conn; 2441 2442 // Connection management 2443 reverse_bd_addr(&packet[8], addr); 2444 addr_type = (bd_addr_type_t)packet[7]; 2445 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2446 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2447 2448 #ifdef ENABLE_LE_CENTRAL 2449 // handle error: error is reported only to the initiator -> outgoing connection 2450 if (packet[3]){ 2451 2452 // handle cancelled outgoing connection 2453 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2454 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2455 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2456 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2457 // reset state 2458 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2459 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2460 // get outgoing connection conn struct for direct connect 2461 conn = gap_get_outgoing_connection(); 2462 } 2463 2464 // outgoing le connection establishment is done 2465 if (conn){ 2466 // remove entry 2467 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2468 btstack_memory_hci_connection_free( conn ); 2469 } 2470 return; 2471 } 2472 #endif 2473 2474 // on success, both hosts receive connection complete event 2475 if (packet[6] == HCI_ROLE_MASTER){ 2476 #ifdef ENABLE_LE_CENTRAL 2477 // if we're master on an le connection, it was an outgoing connection and we're done with it 2478 // note: no hci_connection_t object exists yet for connect with whitelist 2479 if (hci_is_le_connection_type(addr_type)){ 2480 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2481 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2482 } 2483 #endif 2484 } else { 2485 #ifdef ENABLE_LE_PERIPHERAL 2486 // if we're slave, it was an incoming connection, advertisements have stopped 2487 hci_stack->le_advertisements_active = false; 2488 #endif 2489 } 2490 2491 // LE connections are auto-accepted, so just create a connection if there isn't one already 2492 if (!conn){ 2493 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2494 } 2495 2496 // no memory, sorry. 2497 if (!conn){ 2498 return; 2499 } 2500 2501 conn->state = OPEN; 2502 conn->role = packet[6]; 2503 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2504 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2505 2506 #ifdef ENABLE_LE_PERIPHERAL 2507 if (packet[6] == HCI_ROLE_SLAVE){ 2508 hci_update_advertisements_enabled_for_current_roles(); 2509 } 2510 #endif 2511 2512 // init unenhanced att bearer mtu 2513 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2514 conn->att_connection.mtu_exchanged = false; 2515 2516 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2517 2518 // restart timer 2519 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2520 // btstack_run_loop_add_timer(&conn->timeout); 2521 2522 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2523 2524 hci_emit_nr_connections_changed(); 2525 } 2526 #endif 2527 2528 #ifdef ENABLE_CLASSIC 2529 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){ 2530 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2531 // LEVEL_4 is tested by l2cap 2532 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2533 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2534 if (level >= LEVEL_3){ 2535 // MITM not possible without keyboard or display 2536 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2537 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2538 2539 // MITM possible if one side has keyboard and the other has keyboard or display 2540 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2541 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2542 2543 // MITM not possible if one side has only display and other side has no keyboard 2544 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2545 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2546 } 2547 // LEVEL 2 requires SSP, which is a given 2548 return true; 2549 } 2550 2551 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2552 uint16_t i; 2553 for (i=0; i < size ; i++){ 2554 if (data[i] != 0) { 2555 return false; 2556 } 2557 } 2558 return true; 2559 } 2560 2561 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2562 // get requested security level 2563 gap_security_level_t requested_security_level = conn->requested_security_level; 2564 if (hci_stack->gap_secure_connections_only_mode){ 2565 requested_security_level = LEVEL_4; 2566 } 2567 2568 // assess security: LEVEL 4 requires SC 2569 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2570 if ((requested_security_level == LEVEL_4) && 2571 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2572 !hci_remote_sc_enabled(conn)){ 2573 log_info("Level 4 required, but SC not supported -> abort"); 2574 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2575 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2576 return; 2577 } 2578 2579 // assess security based on io capabilities 2580 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2581 // responder: fully validate io caps of both sides as well as OOB data 2582 bool security_possible = false; 2583 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2584 2585 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2586 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2587 // so we merge the OOB data availability 2588 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2589 if (conn->classic_oob_c_192 != NULL){ 2590 have_oob_data |= 1; 2591 } 2592 if (conn->classic_oob_c_256 != NULL){ 2593 have_oob_data |= 2; 2594 } 2595 // for up to Level 3, either P-192 as well as P-256 will do 2596 // 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 2597 // if remote does not SC, we should not receive P-256 data either 2598 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2599 security_possible = true; 2600 } 2601 // for Level 4, P-256 is needed 2602 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2603 security_possible = true; 2604 } 2605 #endif 2606 2607 if (security_possible == false){ 2608 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2609 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2610 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2611 return; 2612 } 2613 } else { 2614 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2615 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2616 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2617 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2618 log_info("Level 3+ required, but no input/output -> abort"); 2619 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2620 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2621 return; 2622 } 2623 #endif 2624 #endif 2625 } 2626 2627 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2628 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2629 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2630 } else { 2631 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2632 } 2633 #endif 2634 } 2635 2636 #endif 2637 2638 static void event_handler(uint8_t *packet, uint16_t size){ 2639 2640 uint16_t event_length = packet[1]; 2641 2642 // assert packet is complete 2643 if (size != (event_length + 2u)){ 2644 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2645 return; 2646 } 2647 2648 bd_addr_type_t addr_type; 2649 hci_con_handle_t handle; 2650 hci_connection_t * conn; 2651 int i; 2652 int create_connection_cmd; 2653 2654 #ifdef ENABLE_CLASSIC 2655 hci_link_type_t link_type; 2656 bd_addr_t addr; 2657 #endif 2658 2659 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2660 2661 switch (hci_event_packet_get_type(packet)) { 2662 2663 case HCI_EVENT_COMMAND_COMPLETE: 2664 handle_command_complete_event(packet, size); 2665 break; 2666 2667 case HCI_EVENT_COMMAND_STATUS: 2668 // get num cmd packets - limit to 1 to reduce complexity 2669 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2670 2671 // check command status to detected failed outgoing connections 2672 create_connection_cmd = 0; 2673 #ifdef ENABLE_CLASSIC 2674 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2675 create_connection_cmd = 1; 2676 } 2677 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2678 create_connection_cmd = 1; 2679 } 2680 #endif 2681 #ifdef ENABLE_LE_CENTRAL 2682 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2683 create_connection_cmd = 1; 2684 } 2685 #endif 2686 if (create_connection_cmd) { 2687 uint8_t status = hci_event_command_status_get_status(packet); 2688 addr_type = hci_stack->outgoing_addr_type; 2689 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2690 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); 2691 2692 // reset outgoing address info 2693 memset(hci_stack->outgoing_addr, 0, 6); 2694 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2695 2696 // on error 2697 if (status != ERROR_CODE_SUCCESS){ 2698 #ifdef ENABLE_LE_CENTRAL 2699 if (hci_is_le_connection_type(addr_type)){ 2700 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2701 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2702 } 2703 #endif 2704 // error => outgoing connection failed 2705 if (conn != NULL){ 2706 hci_handle_connection_failed(conn, status); 2707 } 2708 } 2709 } 2710 2711 #ifdef ENABLE_CLASSIC 2712 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2713 uint8_t status = hci_event_command_status_get_status(packet); 2714 log_info("command status (inquiry), status %x", status); 2715 if (status == ERROR_CODE_SUCCESS) { 2716 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2717 } else { 2718 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2719 } 2720 } 2721 #endif 2722 break; 2723 2724 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2725 if (size < 3) return; 2726 uint16_t num_handles = packet[2]; 2727 if (size != (3u + num_handles * 4u)) return; 2728 uint16_t offset = 3; 2729 for (i=0; i<num_handles;i++){ 2730 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2731 offset += 2u; 2732 uint16_t num_packets = little_endian_read_16(packet, offset); 2733 offset += 2u; 2734 2735 conn = hci_connection_for_handle(handle); 2736 if (!conn){ 2737 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2738 continue; 2739 } 2740 2741 if (conn->num_packets_sent >= num_packets){ 2742 conn->num_packets_sent -= num_packets; 2743 } else { 2744 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2745 conn->num_packets_sent = 0; 2746 } 2747 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2748 2749 #ifdef ENABLE_CLASSIC 2750 // For SCO, we do the can_send_now_check here 2751 hci_notify_if_sco_can_send_now(); 2752 #endif 2753 } 2754 break; 2755 } 2756 2757 #ifdef ENABLE_CLASSIC 2758 case HCI_EVENT_INQUIRY_COMPLETE: 2759 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2760 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2761 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2762 hci_emit_event(event, sizeof(event), 1); 2763 } 2764 break; 2765 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2766 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2767 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2768 } 2769 break; 2770 case HCI_EVENT_CONNECTION_REQUEST: 2771 reverse_bd_addr(&packet[2], addr); 2772 link_type = (hci_link_type_t) packet[11]; 2773 2774 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2775 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2776 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2777 bd_addr_copy(hci_stack->decline_addr, addr); 2778 break; 2779 } 2780 2781 if (hci_stack->gap_classic_accept_callback != NULL){ 2782 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2783 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2784 bd_addr_copy(hci_stack->decline_addr, addr); 2785 break; 2786 } 2787 } 2788 2789 // TODO: eval COD 8-10 2790 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2791 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2792 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2793 if (!conn) { 2794 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2795 } 2796 if (!conn) { 2797 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2798 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2799 bd_addr_copy(hci_stack->decline_addr, addr); 2800 hci_run(); 2801 // avoid event to higher layer 2802 return; 2803 } 2804 conn->role = HCI_ROLE_SLAVE; 2805 conn->state = RECEIVED_CONNECTION_REQUEST; 2806 // store info about eSCO 2807 if (link_type == HCI_LINK_TYPE_ESCO){ 2808 conn->remote_supported_features[0] |= 1; 2809 } 2810 hci_run(); 2811 break; 2812 2813 case HCI_EVENT_CONNECTION_COMPLETE: 2814 // Connection management 2815 reverse_bd_addr(&packet[5], addr); 2816 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2817 addr_type = BD_ADDR_TYPE_ACL; 2818 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2819 if (conn) { 2820 if (!packet[2]){ 2821 conn->state = OPEN; 2822 conn->con_handle = little_endian_read_16(packet, 3); 2823 2824 // queue set supervision timeout if we're master 2825 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2826 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2827 } 2828 2829 // restart timer 2830 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2831 btstack_run_loop_add_timer(&conn->timeout); 2832 2833 // trigger remote features for dedicated bonding 2834 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2835 hci_trigger_remote_features_for_connection(conn); 2836 } 2837 2838 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2839 2840 hci_emit_nr_connections_changed(); 2841 } else { 2842 // connection failed 2843 hci_handle_connection_failed(conn, packet[2]); 2844 } 2845 } 2846 break; 2847 2848 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2849 reverse_bd_addr(&packet[5], addr); 2850 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2851 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2852 if (packet[2]){ 2853 // connection failed 2854 if (conn){ 2855 hci_handle_connection_failed(conn, packet[2]); 2856 } 2857 break; 2858 } 2859 if (!conn) { 2860 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2861 } 2862 if (!conn) { 2863 break; 2864 } 2865 conn->state = OPEN; 2866 conn->con_handle = little_endian_read_16(packet, 3); 2867 2868 #ifdef ENABLE_SCO_OVER_HCI 2869 // update SCO 2870 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2871 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2872 } 2873 // trigger can send now 2874 if (hci_have_usb_transport()){ 2875 hci_stack->sco_can_send_now = true; 2876 } 2877 #endif 2878 #ifdef HAVE_SCO_TRANSPORT 2879 // configure sco transport 2880 if (hci_stack->sco_transport != NULL){ 2881 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2882 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2883 } 2884 #endif 2885 break; 2886 2887 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2888 handle = little_endian_read_16(packet, 3); 2889 conn = hci_connection_for_handle(handle); 2890 if (!conn) break; 2891 if (!packet[2]){ 2892 const uint8_t * features = &packet[5]; 2893 hci_handle_remote_features_page_0(conn, features); 2894 2895 // read extended features if possible 2896 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 2897 && ((conn->remote_supported_features[0] & 2) != 0)) { 2898 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2899 break; 2900 } 2901 } 2902 hci_handle_remote_features_received(conn); 2903 break; 2904 2905 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2906 handle = little_endian_read_16(packet, 3); 2907 conn = hci_connection_for_handle(handle); 2908 if (!conn) break; 2909 // status = ok, page = 1 2910 if (!packet[2]) { 2911 uint8_t page_number = packet[5]; 2912 uint8_t maximum_page_number = packet[6]; 2913 const uint8_t * features = &packet[7]; 2914 bool done = false; 2915 switch (page_number){ 2916 case 1: 2917 hci_handle_remote_features_page_1(conn, features); 2918 if (maximum_page_number >= 2){ 2919 // get Secure Connections (Controller) from Page 2 if available 2920 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2921 } else { 2922 // otherwise, assume SC (Controller) == SC (Host) 2923 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2924 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2925 } 2926 done = true; 2927 } 2928 break; 2929 case 2: 2930 hci_handle_remote_features_page_2(conn, features); 2931 done = true; 2932 break; 2933 default: 2934 break; 2935 } 2936 if (!done) break; 2937 } 2938 hci_handle_remote_features_received(conn); 2939 break; 2940 2941 case HCI_EVENT_LINK_KEY_REQUEST: 2942 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2943 hci_event_link_key_request_get_bd_addr(packet, addr); 2944 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2945 if (!conn) break; 2946 2947 // lookup link key in db if not cached 2948 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2949 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2950 } 2951 2952 // response sent by hci_run() 2953 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2954 #endif 2955 break; 2956 2957 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2958 hci_event_link_key_request_get_bd_addr(packet, addr); 2959 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2960 if (!conn) break; 2961 2962 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2963 2964 // CVE-2020-26555: ignore NULL link key 2965 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2966 if (btstack_is_null(&packet[8], 16)) break; 2967 2968 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2969 // Change Connection Encryption keeps link key type 2970 if (link_key_type != CHANGED_COMBINATION_KEY){ 2971 conn->link_key_type = link_key_type; 2972 } 2973 2974 // cache link key. link keys stored in little-endian format for legacy reasons 2975 memcpy(&conn->link_key, &packet[8], 16); 2976 2977 // only store link key: 2978 // - if bondable enabled 2979 if (hci_stack->bondable == false) break; 2980 // - if security level sufficient 2981 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2982 // - for SSP, also check if remote side requested bonding as well 2983 if (conn->link_key_type != COMBINATION_KEY){ 2984 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2985 if (!remote_bonding){ 2986 break; 2987 } 2988 } 2989 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2990 break; 2991 } 2992 2993 case HCI_EVENT_PIN_CODE_REQUEST: 2994 hci_event_pin_code_request_get_bd_addr(packet, addr); 2995 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2996 if (!conn) break; 2997 2998 hci_pairing_started(conn, false); 2999 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3000 if (!hci_stack->bondable ){ 3001 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3002 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3003 hci_run(); 3004 return; 3005 } 3006 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3007 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3008 log_info("Level 4 required, but SC not supported -> abort"); 3009 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3010 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3011 hci_run(); 3012 return; 3013 } 3014 break; 3015 3016 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3017 hci_event_io_capability_response_get_bd_addr(packet, addr); 3018 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3019 if (!conn) break; 3020 3021 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3022 hci_pairing_started(conn, true); 3023 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3024 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3025 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3026 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3027 #endif 3028 break; 3029 3030 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3031 hci_event_io_capability_response_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_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3036 hci_connection_timestamp(conn); 3037 hci_pairing_started(conn, true); 3038 break; 3039 3040 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3041 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3042 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3043 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3044 if (!conn) break; 3045 3046 hci_connection_timestamp(conn); 3047 3048 hci_pairing_started(conn, true); 3049 3050 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3051 break; 3052 #endif 3053 3054 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3055 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3056 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3057 if (!conn) break; 3058 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3059 if (hci_stack->ssp_auto_accept){ 3060 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3061 }; 3062 } else { 3063 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3064 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3065 // don't forward event to app 3066 hci_run(); 3067 return; 3068 } 3069 break; 3070 3071 case HCI_EVENT_USER_PASSKEY_REQUEST: 3072 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3073 if (hci_stack->ssp_auto_accept){ 3074 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3075 }; 3076 break; 3077 3078 case HCI_EVENT_MODE_CHANGE: 3079 handle = hci_event_mode_change_get_handle(packet); 3080 conn = hci_connection_for_handle(handle); 3081 if (!conn) break; 3082 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3083 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3084 break; 3085 #endif 3086 3087 case HCI_EVENT_ENCRYPTION_CHANGE: 3088 handle = hci_event_encryption_change_get_connection_handle(packet); 3089 conn = hci_connection_for_handle(handle); 3090 if (!conn) break; 3091 if (hci_event_encryption_change_get_status(packet) == 0u) { 3092 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3093 if (encryption_enabled){ 3094 if (hci_is_le_connection(conn)){ 3095 // For LE, we accept connection as encrypted 3096 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3097 } 3098 #ifdef ENABLE_CLASSIC 3099 else { 3100 3101 // dedicated bonding: send result and disconnect 3102 if (conn->bonding_flags & BONDING_DEDICATED){ 3103 conn->bonding_flags &= ~BONDING_DEDICATED; 3104 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3105 conn->bonding_status = packet[2]; 3106 break; 3107 } 3108 3109 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3110 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3111 bool connected_uses_aes_ccm = encryption_enabled == 2; 3112 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3113 log_info("SC during pairing, but only E0 now -> abort"); 3114 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3115 break; 3116 } 3117 3118 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3119 if (connected_uses_aes_ccm){ 3120 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3121 } 3122 3123 #ifdef ENABLE_TESTING_SUPPORT 3124 // work around for issue with PTS dongle 3125 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3126 #endif 3127 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3128 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3129 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3130 } else { 3131 // if not, pretend everything is perfect 3132 hci_handle_read_encryption_key_size_complete(conn, 16); 3133 } 3134 } 3135 #endif 3136 } else { 3137 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3138 } 3139 } 3140 3141 break; 3142 3143 #ifdef ENABLE_CLASSIC 3144 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3145 handle = hci_event_authentication_complete_get_connection_handle(packet); 3146 conn = hci_connection_for_handle(handle); 3147 if (!conn) break; 3148 3149 // clear authentication active flag 3150 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3151 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3152 3153 // authenticated only if auth status == 0 3154 if (hci_event_authentication_complete_get_status(packet) == 0){ 3155 // authenticated 3156 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3157 3158 // If not already encrypted, start encryption 3159 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3160 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3161 break; 3162 } 3163 } 3164 3165 // emit updated security level 3166 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3167 break; 3168 3169 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3170 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3171 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3172 if (!conn) break; 3173 3174 // treat successfully paired connection as authenticated 3175 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3176 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3177 } 3178 3179 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3180 break; 3181 #endif 3182 3183 // HCI_EVENT_DISCONNECTION_COMPLETE 3184 // has been split, to first notify stack before shutting connection down 3185 // see end of function, too. 3186 case HCI_EVENT_DISCONNECTION_COMPLETE: 3187 if (packet[2]) break; // status != 0 3188 handle = little_endian_read_16(packet, 3); 3189 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3190 if (hci_stack->acl_fragmentation_total_size > 0u) { 3191 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3192 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3193 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3194 hci_stack->acl_fragmentation_total_size = 0; 3195 hci_stack->acl_fragmentation_pos = 0; 3196 if (release_buffer){ 3197 hci_release_packet_buffer(); 3198 } 3199 } 3200 } 3201 3202 conn = hci_connection_for_handle(handle); 3203 if (!conn) break; 3204 #ifdef ENABLE_CLASSIC 3205 // pairing failed if it was ongoing 3206 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3207 #endif 3208 3209 // emit dedicatd bonding event 3210 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3211 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3212 } 3213 3214 // mark connection for shutdown, stop timers, reset state 3215 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3216 hci_connection_stop_timer(conn); 3217 hci_connection_init(conn); 3218 3219 #ifdef ENABLE_BLE 3220 #ifdef ENABLE_LE_PERIPHERAL 3221 // re-enable advertisements for le connections if active 3222 if (hci_is_le_connection(conn)){ 3223 hci_update_advertisements_enabled_for_current_roles(); 3224 } 3225 #endif 3226 #endif 3227 break; 3228 3229 case HCI_EVENT_HARDWARE_ERROR: 3230 log_error("Hardware Error: 0x%02x", packet[2]); 3231 if (hci_stack->hardware_error_callback){ 3232 (*hci_stack->hardware_error_callback)(packet[2]); 3233 } else { 3234 // if no special requests, just reboot stack 3235 hci_power_control_off(); 3236 hci_power_control_on(); 3237 } 3238 break; 3239 3240 #ifdef ENABLE_CLASSIC 3241 case HCI_EVENT_ROLE_CHANGE: 3242 if (packet[2]) break; // status != 0 3243 reverse_bd_addr(&packet[3], addr); 3244 addr_type = BD_ADDR_TYPE_ACL; 3245 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3246 if (!conn) break; 3247 conn->role = packet[9]; 3248 break; 3249 #endif 3250 3251 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3252 // release packet buffer only for asynchronous transport and if there are not further fragements 3253 if (hci_transport_synchronous()) { 3254 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3255 return; // instead of break: to avoid re-entering hci_run() 3256 } 3257 hci_stack->acl_fragmentation_tx_active = 0; 3258 if (hci_stack->acl_fragmentation_total_size) break; 3259 hci_release_packet_buffer(); 3260 3261 // L2CAP receives this event via the hci_emit_event below 3262 3263 #ifdef ENABLE_CLASSIC 3264 // For SCO, we do the can_send_now_check here 3265 hci_notify_if_sco_can_send_now(); 3266 #endif 3267 break; 3268 3269 #ifdef ENABLE_CLASSIC 3270 case HCI_EVENT_SCO_CAN_SEND_NOW: 3271 // For SCO, we do the can_send_now_check here 3272 hci_stack->sco_can_send_now = true; 3273 hci_notify_if_sco_can_send_now(); 3274 return; 3275 3276 // explode inquriy results for easier consumption 3277 case HCI_EVENT_INQUIRY_RESULT: 3278 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3279 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3280 gap_inquiry_explode(packet, size); 3281 break; 3282 #endif 3283 3284 #ifdef ENABLE_BLE 3285 case HCI_EVENT_LE_META: 3286 switch (packet[2]){ 3287 #ifdef ENABLE_LE_CENTRAL 3288 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3289 // log_info("advertising report received"); 3290 if (!hci_stack->le_scanning_enabled) break; 3291 le_handle_advertisement_report(packet, size); 3292 break; 3293 #endif 3294 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3295 event_handle_le_connection_complete(packet); 3296 break; 3297 3298 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3299 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3300 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3301 conn = hci_connection_for_handle(handle); 3302 if (!conn) break; 3303 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3304 break; 3305 3306 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3307 // connection 3308 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3309 conn = hci_connection_for_handle(handle); 3310 if (conn) { 3311 // read arguments 3312 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3313 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3314 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3315 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3316 3317 // validate against current connection parameter range 3318 le_connection_parameter_range_t existing_range; 3319 gap_get_connection_parameter_range(&existing_range); 3320 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3321 if (update_parameter){ 3322 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3323 conn->le_conn_interval_min = le_conn_interval_min; 3324 conn->le_conn_interval_max = le_conn_interval_max; 3325 conn->le_conn_latency = le_conn_latency; 3326 conn->le_supervision_timeout = le_supervision_timeout; 3327 } else { 3328 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3329 } 3330 } 3331 break; 3332 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3333 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3334 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3335 conn = hci_connection_for_handle(handle); 3336 if (conn) { 3337 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3338 } 3339 break; 3340 #endif 3341 default: 3342 break; 3343 } 3344 break; 3345 #endif 3346 case HCI_EVENT_VENDOR_SPECIFIC: 3347 // Vendor specific commands often create vendor specific event instead of num completed packets 3348 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3349 switch (hci_stack->manufacturer){ 3350 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3351 hci_stack->num_cmd_packets = 1; 3352 break; 3353 default: 3354 break; 3355 } 3356 break; 3357 default: 3358 break; 3359 } 3360 3361 handle_event_for_current_stack_state(packet, size); 3362 3363 // notify upper stack 3364 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3365 3366 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3367 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3368 handle = little_endian_read_16(packet, 3); 3369 hci_connection_t * aConn = hci_connection_for_handle(handle); 3370 // discard connection if app did not trigger a reconnect in the event handler 3371 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3372 hci_shutdown_connection(aConn); 3373 } 3374 } 3375 3376 // execute main loop 3377 hci_run(); 3378 } 3379 3380 #ifdef ENABLE_CLASSIC 3381 3382 #ifdef ENABLE_SCO_OVER_HCI 3383 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3384 static void sco_schedule_tx(hci_connection_t * conn); 3385 3386 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3387 log_debug("SCO TX Timeout"); 3388 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3389 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3390 if (!conn) return; 3391 3392 // trigger send 3393 conn->sco_tx_ready = 1; 3394 // extra packet if CVSD but SCO buffer is too short 3395 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3396 conn->sco_tx_ready++; 3397 } 3398 hci_notify_if_sco_can_send_now(); 3399 } 3400 3401 3402 #define SCO_TX_AFTER_RX_MS (6) 3403 3404 static void sco_schedule_tx(hci_connection_t * conn){ 3405 3406 uint32_t now = btstack_run_loop_get_time_ms(); 3407 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3408 int time_delta_ms = sco_tx_ms - now; 3409 3410 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3411 3412 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3413 btstack_run_loop_remove_timer(timer); 3414 btstack_run_loop_set_timer(timer, time_delta_ms); 3415 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3416 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3417 btstack_run_loop_add_timer(timer); 3418 } 3419 #endif 3420 3421 static void sco_handler(uint8_t * packet, uint16_t size){ 3422 // lookup connection struct 3423 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3424 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3425 if (!conn) return; 3426 3427 #ifdef ENABLE_SCO_OVER_HCI 3428 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3429 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3430 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3431 packet[2] = 0x3c; 3432 memmove(&packet[3], &packet[23], 63); 3433 size = 63; 3434 } 3435 } 3436 3437 if (hci_have_usb_transport()){ 3438 // Nothing to do 3439 } else { 3440 // 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); 3441 if (hci_stack->synchronous_flow_control_enabled == 0){ 3442 uint32_t now = btstack_run_loop_get_time_ms(); 3443 3444 if (!conn->sco_rx_valid){ 3445 // ignore first 10 packets 3446 conn->sco_rx_count++; 3447 // log_debug("sco rx count %u", conn->sco_rx_count); 3448 if (conn->sco_rx_count == 10) { 3449 // use first timestamp as is and pretent it just started 3450 conn->sco_rx_ms = now; 3451 conn->sco_rx_valid = 1; 3452 conn->sco_rx_count = 0; 3453 sco_schedule_tx(conn); 3454 } 3455 } else { 3456 // track expected arrival timme 3457 conn->sco_rx_count++; 3458 conn->sco_rx_ms += 7; 3459 int delta = (int32_t) (now - conn->sco_rx_ms); 3460 if (delta > 0){ 3461 conn->sco_rx_ms++; 3462 } 3463 // log_debug("sco rx %u", conn->sco_rx_ms); 3464 sco_schedule_tx(conn); 3465 } 3466 } 3467 } 3468 #endif 3469 3470 // deliver to app 3471 if (hci_stack->sco_packet_handler) { 3472 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3473 } 3474 3475 #ifdef HAVE_SCO_TRANSPORT 3476 // We can send one packet for each received packet 3477 conn->sco_tx_ready++; 3478 hci_notify_if_sco_can_send_now(); 3479 #endif 3480 3481 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3482 conn->num_packets_completed++; 3483 hci_stack->host_completed_packets = 1; 3484 hci_run(); 3485 #endif 3486 } 3487 #endif 3488 3489 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3490 hci_dump_packet(packet_type, 1, packet, size); 3491 switch (packet_type) { 3492 case HCI_EVENT_PACKET: 3493 event_handler(packet, size); 3494 break; 3495 case HCI_ACL_DATA_PACKET: 3496 acl_handler(packet, size); 3497 break; 3498 #ifdef ENABLE_CLASSIC 3499 case HCI_SCO_DATA_PACKET: 3500 sco_handler(packet, size); 3501 break; 3502 #endif 3503 default: 3504 break; 3505 } 3506 } 3507 3508 /** 3509 * @brief Add event packet handler. 3510 */ 3511 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3512 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3513 } 3514 3515 /** 3516 * @brief Remove event packet handler. 3517 */ 3518 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3519 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3520 } 3521 3522 /** Register HCI packet handlers */ 3523 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3524 hci_stack->acl_packet_handler = handler; 3525 } 3526 3527 #ifdef ENABLE_CLASSIC 3528 /** 3529 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3530 */ 3531 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3532 hci_stack->sco_packet_handler = handler; 3533 } 3534 #endif 3535 3536 static void hci_state_reset(void){ 3537 // no connections yet 3538 hci_stack->connections = NULL; 3539 3540 // keep discoverable/connectable as this has been requested by the client(s) 3541 // hci_stack->discoverable = 0; 3542 // hci_stack->connectable = 0; 3543 // hci_stack->bondable = 1; 3544 // hci_stack->own_addr_type = 0; 3545 3546 // buffer is free 3547 hci_stack->hci_packet_buffer_reserved = false; 3548 3549 // no pending cmds 3550 hci_stack->decline_reason = 0; 3551 3552 hci_stack->secure_connections_active = false; 3553 3554 #ifdef ENABLE_CLASSIC 3555 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3556 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3557 3558 hci_stack->gap_tasks_classic = 3559 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3560 GAP_TASK_SET_CLASS_OF_DEVICE | 3561 GAP_TASK_SET_LOCAL_NAME | 3562 GAP_TASK_SET_EIR_DATA | 3563 GAP_TASK_WRITE_SCAN_ENABLE | 3564 GAP_TASK_WRITE_PAGE_TIMEOUT; 3565 #endif 3566 3567 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3568 hci_stack->classic_read_local_oob_data = false; 3569 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3570 #endif 3571 3572 // LE 3573 #ifdef ENABLE_BLE 3574 memset(hci_stack->le_random_address, 0, 6); 3575 hci_stack->le_random_address_set = 0; 3576 #endif 3577 #ifdef ENABLE_LE_CENTRAL 3578 hci_stack->le_scanning_active = false; 3579 hci_stack->le_scanning_param_update = true; 3580 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3581 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3582 hci_stack->le_whitelist_capacity = 0; 3583 #endif 3584 #ifdef ENABLE_LE_PERIPHERAL 3585 hci_stack->le_advertisements_active = false; 3586 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3587 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3588 } 3589 if (hci_stack->le_advertisements_data != NULL){ 3590 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3591 } 3592 #endif 3593 } 3594 3595 #ifdef ENABLE_CLASSIC 3596 /** 3597 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3598 */ 3599 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3600 // store and open remote device db 3601 hci_stack->link_key_db = link_key_db; 3602 if (hci_stack->link_key_db) { 3603 hci_stack->link_key_db->open(); 3604 } 3605 } 3606 #endif 3607 3608 void hci_init(const hci_transport_t *transport, const void *config){ 3609 3610 #ifdef HAVE_MALLOC 3611 if (!hci_stack) { 3612 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3613 } 3614 #else 3615 hci_stack = &hci_stack_static; 3616 #endif 3617 memset(hci_stack, 0, sizeof(hci_stack_t)); 3618 3619 // reference to use transport layer implementation 3620 hci_stack->hci_transport = transport; 3621 3622 // reference to used config 3623 hci_stack->config = config; 3624 3625 // setup pointer for outgoing packet buffer 3626 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3627 3628 // max acl payload size defined in config.h 3629 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3630 3631 // register packet handlers with transport 3632 transport->register_packet_handler(&packet_handler); 3633 3634 hci_stack->state = HCI_STATE_OFF; 3635 3636 // class of device 3637 hci_stack->class_of_device = 0x007a020c; // Smartphone 3638 3639 // bondable by default 3640 hci_stack->bondable = 1; 3641 3642 #ifdef ENABLE_CLASSIC 3643 // classic name 3644 hci_stack->local_name = default_classic_name; 3645 3646 // Master slave policy 3647 hci_stack->master_slave_policy = 1; 3648 3649 // Allow Role Switch 3650 hci_stack->allow_role_switch = 1; 3651 3652 // Default / minimum security level = 2 3653 hci_stack->gap_security_level = LEVEL_2; 3654 3655 // Default Security Mode 4 3656 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3657 3658 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3659 hci_stack->gap_required_encyrption_key_size = 7; 3660 3661 // Link Supervision Timeout 3662 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3663 3664 #endif 3665 3666 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3667 hci_stack->ssp_enable = 1; 3668 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3669 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3670 hci_stack->ssp_auto_accept = 1; 3671 3672 // Secure Connections: enable (requires support from Controller) 3673 hci_stack->secure_connections_enable = true; 3674 3675 // voice setting - signed 16 bit pcm data with CVSD over the air 3676 hci_stack->sco_voice_setting = 0x60; 3677 3678 #ifdef ENABLE_LE_CENTRAL 3679 // connection parameter to use for outgoing connections 3680 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3681 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3682 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3683 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3684 hci_stack->le_connection_latency = 4; // 4 3685 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3686 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3687 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3688 3689 // default LE Scanning 3690 hci_stack->le_scan_type = 0x1; // active 3691 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3692 hci_stack->le_scan_window = 0x30; // 30 ms 3693 #endif 3694 3695 #ifdef ENABLE_LE_PERIPHERAL 3696 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3697 #endif 3698 3699 // connection parameter range used to answer connection parameter update requests in l2cap 3700 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3701 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3702 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3703 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3704 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3705 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3706 3707 hci_state_reset(); 3708 } 3709 3710 void hci_deinit(void){ 3711 #ifdef HAVE_MALLOC 3712 if (hci_stack) { 3713 free(hci_stack); 3714 } 3715 #endif 3716 hci_stack = NULL; 3717 3718 #ifdef ENABLE_CLASSIC 3719 disable_l2cap_timeouts = 0; 3720 #endif 3721 } 3722 3723 /** 3724 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3725 */ 3726 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3727 hci_stack->chipset = chipset_driver; 3728 3729 // reset chipset driver - init is also called on power_up 3730 if (hci_stack->chipset && hci_stack->chipset->init){ 3731 hci_stack->chipset->init(hci_stack->config); 3732 } 3733 } 3734 3735 /** 3736 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3737 */ 3738 void hci_set_control(const btstack_control_t *hardware_control){ 3739 // references to used control implementation 3740 hci_stack->control = hardware_control; 3741 // init with transport config 3742 hardware_control->init(hci_stack->config); 3743 } 3744 3745 static void hci_discard_connections(void){ 3746 btstack_linked_list_iterator_t lit; 3747 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3748 while (btstack_linked_list_iterator_has_next(&lit)){ 3749 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3750 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3751 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3752 hci_shutdown_connection(connection); 3753 } 3754 } 3755 3756 void hci_close(void){ 3757 3758 #ifdef ENABLE_CLASSIC 3759 // close remote device db 3760 if (hci_stack->link_key_db) { 3761 hci_stack->link_key_db->close(); 3762 } 3763 #endif 3764 3765 hci_discard_connections(); 3766 3767 hci_power_control(HCI_POWER_OFF); 3768 3769 #ifdef HAVE_MALLOC 3770 free(hci_stack); 3771 #endif 3772 hci_stack = NULL; 3773 } 3774 3775 #ifdef HAVE_SCO_TRANSPORT 3776 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3777 hci_stack->sco_transport = sco_transport; 3778 sco_transport->register_packet_handler(&packet_handler); 3779 } 3780 #endif 3781 3782 #ifdef ENABLE_CLASSIC 3783 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3784 // validate ranage and set 3785 if (encryption_key_size < 7) return; 3786 if (encryption_key_size > 16) return; 3787 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3788 } 3789 3790 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3791 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3792 hci_stack->gap_security_mode = security_mode; 3793 return ERROR_CODE_SUCCESS; 3794 } else { 3795 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3796 } 3797 } 3798 3799 gap_security_mode_t gap_get_security_mode(void){ 3800 return hci_stack->gap_security_mode; 3801 } 3802 3803 void gap_set_security_level(gap_security_level_t security_level){ 3804 hci_stack->gap_security_level = security_level; 3805 } 3806 3807 gap_security_level_t gap_get_security_level(void){ 3808 if (hci_stack->gap_secure_connections_only_mode){ 3809 return LEVEL_4; 3810 } 3811 return hci_stack->gap_security_level; 3812 } 3813 3814 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3815 hci_stack->gap_minimal_service_security_level = security_level; 3816 } 3817 3818 void gap_set_secure_connections_only_mode(bool enable){ 3819 hci_stack->gap_secure_connections_only_mode = enable; 3820 } 3821 3822 bool gap_get_secure_connections_only_mode(void){ 3823 return hci_stack->gap_secure_connections_only_mode; 3824 } 3825 #endif 3826 3827 #ifdef ENABLE_CLASSIC 3828 void gap_set_class_of_device(uint32_t class_of_device){ 3829 hci_stack->class_of_device = class_of_device; 3830 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3831 hci_run(); 3832 } 3833 3834 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3835 hci_stack->default_link_policy_settings = default_link_policy_settings; 3836 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3837 hci_run(); 3838 } 3839 3840 void gap_set_allow_role_switch(bool allow_role_switch){ 3841 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3842 } 3843 3844 uint8_t hci_get_allow_role_switch(void){ 3845 return hci_stack->allow_role_switch; 3846 } 3847 3848 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3849 hci_stack->link_supervision_timeout = link_supervision_timeout; 3850 } 3851 3852 void hci_disable_l2cap_timeout_check(void){ 3853 disable_l2cap_timeouts = 1; 3854 } 3855 #endif 3856 3857 #ifndef HAVE_HOST_CONTROLLER_API 3858 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3859 void hci_set_bd_addr(bd_addr_t addr){ 3860 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3861 hci_stack->custom_bd_addr_set = 1; 3862 } 3863 #endif 3864 3865 // State-Module-Driver overview 3866 // state module low-level 3867 // HCI_STATE_OFF off close 3868 // HCI_STATE_INITIALIZING, on open 3869 // HCI_STATE_WORKING, on open 3870 // HCI_STATE_HALTING, on open 3871 // HCI_STATE_SLEEPING, off/sleep close 3872 // HCI_STATE_FALLING_ASLEEP on open 3873 3874 static int hci_power_control_on(void){ 3875 3876 // power on 3877 int err = 0; 3878 if (hci_stack->control && hci_stack->control->on){ 3879 err = (*hci_stack->control->on)(); 3880 } 3881 if (err){ 3882 log_error( "POWER_ON failed"); 3883 hci_emit_hci_open_failed(); 3884 return err; 3885 } 3886 3887 // int chipset driver 3888 if (hci_stack->chipset && hci_stack->chipset->init){ 3889 hci_stack->chipset->init(hci_stack->config); 3890 } 3891 3892 // init transport 3893 if (hci_stack->hci_transport->init){ 3894 hci_stack->hci_transport->init(hci_stack->config); 3895 } 3896 3897 // open transport 3898 err = hci_stack->hci_transport->open(); 3899 if (err){ 3900 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3901 if (hci_stack->control && hci_stack->control->off){ 3902 (*hci_stack->control->off)(); 3903 } 3904 hci_emit_hci_open_failed(); 3905 return err; 3906 } 3907 return 0; 3908 } 3909 3910 static void hci_power_control_off(void){ 3911 3912 log_info("hci_power_control_off"); 3913 3914 // close low-level device 3915 hci_stack->hci_transport->close(); 3916 3917 log_info("hci_power_control_off - hci_transport closed"); 3918 3919 // power off 3920 if (hci_stack->control && hci_stack->control->off){ 3921 (*hci_stack->control->off)(); 3922 } 3923 3924 log_info("hci_power_control_off - control closed"); 3925 3926 hci_stack->state = HCI_STATE_OFF; 3927 } 3928 3929 static void hci_power_control_sleep(void){ 3930 3931 log_info("hci_power_control_sleep"); 3932 3933 #if 0 3934 // don't close serial port during sleep 3935 3936 // close low-level device 3937 hci_stack->hci_transport->close(hci_stack->config); 3938 #endif 3939 3940 // sleep mode 3941 if (hci_stack->control && hci_stack->control->sleep){ 3942 (*hci_stack->control->sleep)(); 3943 } 3944 3945 hci_stack->state = HCI_STATE_SLEEPING; 3946 } 3947 3948 static int hci_power_control_wake(void){ 3949 3950 log_info("hci_power_control_wake"); 3951 3952 // wake on 3953 if (hci_stack->control && hci_stack->control->wake){ 3954 (*hci_stack->control->wake)(); 3955 } 3956 3957 #if 0 3958 // open low-level device 3959 int err = hci_stack->hci_transport->open(hci_stack->config); 3960 if (err){ 3961 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3962 if (hci_stack->control && hci_stack->control->off){ 3963 (*hci_stack->control->off)(); 3964 } 3965 hci_emit_hci_open_failed(); 3966 return err; 3967 } 3968 #endif 3969 3970 return 0; 3971 } 3972 3973 static void hci_power_transition_to_initializing(void){ 3974 // set up state machine 3975 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3976 hci_stack->hci_packet_buffer_reserved = false; 3977 hci_stack->state = HCI_STATE_INITIALIZING; 3978 hci_stack->substate = HCI_INIT_SEND_RESET; 3979 } 3980 3981 // returns error 3982 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3983 int err; 3984 switch (power_mode){ 3985 case HCI_POWER_ON: 3986 err = hci_power_control_on(); 3987 if (err != 0) { 3988 log_error("hci_power_control_on() error %d", err); 3989 return err; 3990 } 3991 hci_power_transition_to_initializing(); 3992 break; 3993 case HCI_POWER_OFF: 3994 // do nothing 3995 break; 3996 case HCI_POWER_SLEEP: 3997 // do nothing (with SLEEP == OFF) 3998 break; 3999 default: 4000 btstack_assert(false); 4001 break; 4002 } 4003 return ERROR_CODE_SUCCESS; 4004 } 4005 4006 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4007 switch (power_mode){ 4008 case HCI_POWER_ON: 4009 // do nothing 4010 break; 4011 case HCI_POWER_OFF: 4012 // no connections yet, just turn it off 4013 hci_power_control_off(); 4014 break; 4015 case HCI_POWER_SLEEP: 4016 // no connections yet, just turn it off 4017 hci_power_control_sleep(); 4018 break; 4019 default: 4020 btstack_assert(false); 4021 break; 4022 } 4023 return ERROR_CODE_SUCCESS; 4024 } 4025 4026 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4027 switch (power_mode){ 4028 case HCI_POWER_ON: 4029 // do nothing 4030 break; 4031 case HCI_POWER_OFF: 4032 // see hci_run 4033 hci_stack->state = HCI_STATE_HALTING; 4034 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4035 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4036 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4037 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4038 btstack_run_loop_add_timer(&hci_stack->timeout); 4039 break; 4040 case HCI_POWER_SLEEP: 4041 // see hci_run 4042 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4043 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4044 break; 4045 default: 4046 btstack_assert(false); 4047 break; 4048 } 4049 return ERROR_CODE_SUCCESS; 4050 } 4051 4052 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4053 switch (power_mode){ 4054 case HCI_POWER_ON: 4055 hci_power_transition_to_initializing(); 4056 break; 4057 case HCI_POWER_OFF: 4058 // do nothing 4059 break; 4060 case HCI_POWER_SLEEP: 4061 // see hci_run 4062 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4063 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4064 break; 4065 default: 4066 btstack_assert(false); 4067 break; 4068 } 4069 return ERROR_CODE_SUCCESS; 4070 } 4071 4072 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4073 switch (power_mode){ 4074 case HCI_POWER_ON: 4075 hci_power_transition_to_initializing(); 4076 break; 4077 case HCI_POWER_OFF: 4078 // see hci_run 4079 hci_stack->state = HCI_STATE_HALTING; 4080 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4081 break; 4082 case HCI_POWER_SLEEP: 4083 // do nothing 4084 break; 4085 default: 4086 btstack_assert(false); 4087 break; 4088 } 4089 return ERROR_CODE_SUCCESS; 4090 } 4091 4092 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4093 int err; 4094 switch (power_mode){ 4095 case HCI_POWER_ON: 4096 err = hci_power_control_wake(); 4097 if (err) return err; 4098 hci_power_transition_to_initializing(); 4099 break; 4100 case HCI_POWER_OFF: 4101 hci_stack->state = HCI_STATE_HALTING; 4102 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4103 break; 4104 case HCI_POWER_SLEEP: 4105 // do nothing 4106 break; 4107 default: 4108 btstack_assert(false); 4109 break; 4110 } 4111 return ERROR_CODE_SUCCESS; 4112 } 4113 4114 int hci_power_control(HCI_POWER_MODE power_mode){ 4115 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4116 int err = 0; 4117 switch (hci_stack->state){ 4118 case HCI_STATE_OFF: 4119 err = hci_power_control_state_off(power_mode); 4120 break; 4121 case HCI_STATE_INITIALIZING: 4122 err = hci_power_control_state_initializing(power_mode); 4123 break; 4124 case HCI_STATE_WORKING: 4125 err = hci_power_control_state_working(power_mode); 4126 break; 4127 case HCI_STATE_HALTING: 4128 err = hci_power_control_state_halting(power_mode); 4129 break; 4130 case HCI_STATE_FALLING_ASLEEP: 4131 err = hci_power_control_state_falling_asleep(power_mode); 4132 break; 4133 case HCI_STATE_SLEEPING: 4134 err = hci_power_control_state_sleeping(power_mode); 4135 break; 4136 default: 4137 btstack_assert(false); 4138 break; 4139 } 4140 if (err != 0){ 4141 return err; 4142 } 4143 4144 // create internal event 4145 hci_emit_state(); 4146 4147 // trigger next/first action 4148 hci_run(); 4149 4150 return 0; 4151 } 4152 4153 4154 static void hci_halting_run(void) { 4155 4156 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4157 4158 hci_connection_t *connection; 4159 4160 switch (hci_stack->substate) { 4161 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4162 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4163 4164 #ifdef ENABLE_BLE 4165 #ifdef ENABLE_LE_CENTRAL 4166 hci_whitelist_free(); 4167 #endif 4168 #endif 4169 // close all open connections 4170 connection = (hci_connection_t *) hci_stack->connections; 4171 if (connection) { 4172 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4173 if (!hci_can_send_command_packet_now()) return; 4174 4175 // check state 4176 if (connection->state == SENT_DISCONNECT) return; 4177 connection->state = SENT_DISCONNECT; 4178 4179 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4180 4181 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4182 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4183 4184 // ... which would be ignored anyway as we shutdown (free) the connection now 4185 hci_shutdown_connection(connection); 4186 4187 // finally, send the disconnect command 4188 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4189 return; 4190 } 4191 4192 btstack_run_loop_remove_timer(&hci_stack->timeout); 4193 4194 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4195 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4196 log_info("HCI_STATE_HALTING: wait 50 ms"); 4197 hci_stack->substate = HCI_HALTING_W4_TIMER; 4198 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4199 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4200 btstack_run_loop_add_timer(&hci_stack->timeout); 4201 break; 4202 } 4203 4204 /* fall through */ 4205 4206 case HCI_HALTING_CLOSE: 4207 // close left over connections (that had not been properly closed before) 4208 hci_discard_connections(); 4209 4210 log_info("HCI_STATE_HALTING, calling off"); 4211 4212 // switch mode 4213 hci_power_control_off(); 4214 4215 log_info("HCI_STATE_HALTING, emitting state"); 4216 hci_emit_state(); 4217 log_info("HCI_STATE_HALTING, done"); 4218 break; 4219 4220 case HCI_HALTING_W4_TIMER: 4221 // keep waiting 4222 4223 break; 4224 default: 4225 break; 4226 } 4227 }; 4228 4229 static void hci_falling_asleep_run(void){ 4230 hci_connection_t * connection; 4231 switch(hci_stack->substate) { 4232 case HCI_FALLING_ASLEEP_DISCONNECT: 4233 log_info("HCI_STATE_FALLING_ASLEEP"); 4234 // close all open connections 4235 connection = (hci_connection_t *) hci_stack->connections; 4236 if (connection){ 4237 4238 // send disconnect 4239 if (!hci_can_send_command_packet_now()) return; 4240 4241 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4242 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4243 4244 // send disconnected event right away - causes higher layer connections to get closed, too. 4245 hci_shutdown_connection(connection); 4246 return; 4247 } 4248 4249 if (hci_classic_supported()){ 4250 // disable page and inquiry scan 4251 if (!hci_can_send_command_packet_now()) return; 4252 4253 log_info("HCI_STATE_HALTING, disabling inq scans"); 4254 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4255 4256 // continue in next sub state 4257 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4258 break; 4259 } 4260 4261 /* fall through */ 4262 4263 case HCI_FALLING_ASLEEP_COMPLETE: 4264 log_info("HCI_STATE_HALTING, calling sleep"); 4265 // switch mode 4266 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4267 hci_emit_state(); 4268 break; 4269 4270 default: 4271 break; 4272 } 4273 } 4274 4275 #ifdef ENABLE_CLASSIC 4276 4277 static void hci_update_scan_enable(void){ 4278 // 2 = page scan, 1 = inq scan 4279 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4280 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4281 hci_run(); 4282 } 4283 4284 void gap_discoverable_control(uint8_t enable){ 4285 if (enable) enable = 1; // normalize argument 4286 4287 if (hci_stack->discoverable == enable){ 4288 hci_emit_discoverable_enabled(hci_stack->discoverable); 4289 return; 4290 } 4291 4292 hci_stack->discoverable = enable; 4293 hci_update_scan_enable(); 4294 } 4295 4296 void gap_connectable_control(uint8_t enable){ 4297 if (enable) enable = 1; // normalize argument 4298 4299 // don't emit event 4300 if (hci_stack->connectable == enable) return; 4301 4302 hci_stack->connectable = enable; 4303 hci_update_scan_enable(); 4304 } 4305 #endif 4306 4307 void gap_local_bd_addr(bd_addr_t address_buffer){ 4308 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4309 } 4310 4311 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4312 static void hci_host_num_completed_packets(void){ 4313 4314 // create packet manually as arrays are not supported and num_commands should not get reduced 4315 hci_reserve_packet_buffer(); 4316 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4317 4318 uint16_t size = 0; 4319 uint16_t num_handles = 0; 4320 packet[size++] = 0x35; 4321 packet[size++] = 0x0c; 4322 size++; // skip param len 4323 size++; // skip num handles 4324 4325 // add { handle, packets } entries 4326 btstack_linked_item_t * it; 4327 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4328 hci_connection_t * connection = (hci_connection_t *) it; 4329 if (connection->num_packets_completed){ 4330 little_endian_store_16(packet, size, connection->con_handle); 4331 size += 2; 4332 little_endian_store_16(packet, size, connection->num_packets_completed); 4333 size += 2; 4334 // 4335 num_handles++; 4336 connection->num_packets_completed = 0; 4337 } 4338 } 4339 4340 packet[2] = size - 3; 4341 packet[3] = num_handles; 4342 4343 hci_stack->host_completed_packets = 0; 4344 4345 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4346 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4347 4348 // release packet buffer for synchronous transport implementations 4349 if (hci_transport_synchronous()){ 4350 hci_release_packet_buffer(); 4351 hci_emit_transport_packet_sent(); 4352 } 4353 } 4354 #endif 4355 4356 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4357 UNUSED(ds); 4358 hci_stack->substate = HCI_HALTING_CLOSE; 4359 // allow packet handlers to defer final shutdown 4360 hci_emit_state(); 4361 hci_run(); 4362 } 4363 4364 static bool hci_run_acl_fragments(void){ 4365 if (hci_stack->acl_fragmentation_total_size > 0u) { 4366 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4367 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4368 if (connection) { 4369 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4370 hci_send_acl_packet_fragments(connection); 4371 return true; 4372 } 4373 } else { 4374 // connection gone -> discard further fragments 4375 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4376 hci_stack->acl_fragmentation_total_size = 0; 4377 hci_stack->acl_fragmentation_pos = 0; 4378 } 4379 } 4380 return false; 4381 } 4382 4383 #ifdef ENABLE_CLASSIC 4384 static bool hci_run_general_gap_classic(void){ 4385 4386 // assert stack is working and classic is active 4387 if (hci_classic_supported() == false) return false; 4388 if (hci_stack->state != HCI_STATE_WORKING) return false; 4389 4390 // decline incoming connections 4391 if (hci_stack->decline_reason){ 4392 uint8_t reason = hci_stack->decline_reason; 4393 hci_stack->decline_reason = 0; 4394 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4395 return true; 4396 } 4397 4398 if (hci_stack->gap_tasks_classic != 0){ 4399 hci_run_gap_tasks_classic(); 4400 return true; 4401 } 4402 4403 // start/stop inquiry 4404 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4405 uint8_t duration = hci_stack->inquiry_state; 4406 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4407 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4408 return true; 4409 } 4410 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4411 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4412 hci_send_cmd(&hci_inquiry_cancel); 4413 return true; 4414 } 4415 // remote name request 4416 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4417 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4418 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4419 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4420 return true; 4421 } 4422 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4423 // Local OOB data 4424 if (hci_stack->classic_read_local_oob_data){ 4425 hci_stack->classic_read_local_oob_data = false; 4426 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4427 hci_send_cmd(&hci_read_local_extended_oob_data); 4428 } else { 4429 hci_send_cmd(&hci_read_local_oob_data); 4430 } 4431 } 4432 #endif 4433 // pairing 4434 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4435 uint8_t state = hci_stack->gap_pairing_state; 4436 uint8_t pin_code[16]; 4437 switch (state){ 4438 case GAP_PAIRING_STATE_SEND_PIN: 4439 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4440 memset(pin_code, 0, 16); 4441 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4442 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4443 break; 4444 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4445 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4446 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4447 break; 4448 case GAP_PAIRING_STATE_SEND_PASSKEY: 4449 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4450 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4451 break; 4452 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4453 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4454 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4455 break; 4456 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4457 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4458 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4459 break; 4460 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4461 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4462 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4463 break; 4464 default: 4465 break; 4466 } 4467 return true; 4468 } 4469 return false; 4470 } 4471 #endif 4472 4473 #ifdef ENABLE_BLE 4474 static bool hci_run_general_gap_le(void){ 4475 4476 // Phase 1: collect what to stop 4477 4478 bool scanning_stop = false; 4479 bool connecting_stop = false; 4480 bool advertising_stop = false; 4481 4482 #ifndef ENABLE_LE_CENTRAL 4483 UNUSED(scanning_stop); 4484 UNUSED(connecting_stop); 4485 #endif 4486 #ifndef ENABLE_LE_PERIPHERAL 4487 UNUSED(advertising_stop); 4488 #endif 4489 4490 // check if own address changes 4491 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4492 4493 // check if whitelist needs modification 4494 bool whitelist_modification_pending = false; 4495 btstack_linked_list_iterator_t lit; 4496 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4497 while (btstack_linked_list_iterator_has_next(&lit)){ 4498 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4499 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4500 whitelist_modification_pending = true; 4501 break; 4502 } 4503 } 4504 // check if resolving list needs modification 4505 bool resolving_list_modification_pending = false; 4506 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4507 4508 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4509 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4510 resolving_list_modification_pending = true; 4511 } 4512 #endif 4513 4514 #ifdef ENABLE_LE_CENTRAL 4515 // scanning control 4516 if (hci_stack->le_scanning_active) { 4517 // stop if: 4518 // - parameter change required 4519 // - it's disabled 4520 // - whitelist change required but used for scanning 4521 // - resolving list modified 4522 // - own address changes 4523 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4524 if ((hci_stack->le_scanning_param_update) || 4525 !hci_stack->le_scanning_enabled || 4526 scanning_uses_whitelist || 4527 resolving_list_modification_pending || 4528 random_address_change){ 4529 4530 scanning_stop = true; 4531 } 4532 } 4533 #endif 4534 4535 #ifdef ENABLE_LE_CENTRAL 4536 // connecting control 4537 bool connecting_with_whitelist; 4538 switch (hci_stack->le_connecting_state){ 4539 case LE_CONNECTING_DIRECT: 4540 case LE_CONNECTING_WHITELIST: 4541 // stop connecting if: 4542 // - connecting uses white and whitelist modification pending 4543 // - if it got disabled 4544 // - resolving list modified 4545 // - own address changes 4546 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4547 if ((connecting_with_whitelist && whitelist_modification_pending) || 4548 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4549 resolving_list_modification_pending || 4550 random_address_change) { 4551 4552 connecting_stop = true; 4553 } 4554 break; 4555 default: 4556 break; 4557 } 4558 #endif 4559 4560 #ifdef ENABLE_LE_PERIPHERAL 4561 // le advertisement control 4562 if (hci_stack->le_advertisements_active){ 4563 // stop if: 4564 // - parameter change required 4565 // - random address used in advertising and changes 4566 // - it's disabled 4567 // - whitelist change required but used for advertisement filter policy 4568 // - resolving list modified 4569 // - own address changes 4570 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4571 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4572 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4573 if (advertising_change || 4574 (advertising_uses_random_address && random_address_change) || 4575 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4576 (advertising_uses_whitelist && whitelist_modification_pending) || 4577 resolving_list_modification_pending || 4578 random_address_change) { 4579 4580 advertising_stop = true; 4581 } 4582 } 4583 #endif 4584 4585 4586 // Phase 2: stop everything that should be off during modifications 4587 4588 #ifdef ENABLE_LE_CENTRAL 4589 if (scanning_stop){ 4590 hci_stack->le_scanning_active = false; 4591 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4592 return true; 4593 } 4594 #endif 4595 4596 #ifdef ENABLE_LE_CENTRAL 4597 if (connecting_stop){ 4598 hci_send_cmd(&hci_le_create_connection_cancel); 4599 return true; 4600 } 4601 #endif 4602 4603 #ifdef ENABLE_LE_PERIPHERAL 4604 if (advertising_stop){ 4605 hci_stack->le_advertisements_active = false; 4606 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4607 return true; 4608 } 4609 #endif 4610 4611 // Phase 3: modify 4612 4613 if (random_address_change){ 4614 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4615 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4616 return true; 4617 } 4618 4619 #ifdef ENABLE_LE_CENTRAL 4620 if (hci_stack->le_scanning_param_update){ 4621 hci_stack->le_scanning_param_update = false; 4622 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4623 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4624 return true; 4625 } 4626 #endif 4627 4628 #ifdef ENABLE_LE_PERIPHERAL 4629 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4630 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4631 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4632 hci_send_cmd(&hci_le_set_advertising_parameters, 4633 hci_stack->le_advertisements_interval_min, 4634 hci_stack->le_advertisements_interval_max, 4635 hci_stack->le_advertisements_type, 4636 hci_stack->le_advertisements_own_addr_type, 4637 hci_stack->le_advertisements_direct_address_type, 4638 hci_stack->le_advertisements_direct_address, 4639 hci_stack->le_advertisements_channel_map, 4640 hci_stack->le_advertisements_filter_policy); 4641 return true; 4642 } 4643 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4644 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4645 uint8_t adv_data_clean[31]; 4646 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4647 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4648 hci_stack->le_advertisements_data_len); 4649 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4650 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4651 return true; 4652 } 4653 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4654 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4655 uint8_t scan_data_clean[31]; 4656 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4657 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4658 hci_stack->le_scan_response_data_len); 4659 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4660 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4661 return true; 4662 } 4663 #endif 4664 4665 4666 #ifdef ENABLE_LE_CENTRAL 4667 // if connect with whitelist was active and is not cancelled yet, wait until next time 4668 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4669 #endif 4670 4671 // LE Whitelist Management 4672 if (whitelist_modification_pending){ 4673 // add/remove entries 4674 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4675 while (btstack_linked_list_iterator_has_next(&lit)){ 4676 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4677 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4678 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4679 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4680 return true; 4681 } 4682 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4683 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4684 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4685 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4686 return true; 4687 } 4688 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4689 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4690 btstack_memory_whitelist_entry_free(entry); 4691 } 4692 } 4693 } 4694 4695 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4696 // LE Resolving List Management 4697 if (resolving_list_supported) { 4698 uint16_t i; 4699 switch (hci_stack->le_resolving_list_state) { 4700 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4701 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4702 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4703 return true; 4704 case LE_RESOLVING_LIST_READ_SIZE: 4705 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4706 hci_send_cmd(&hci_le_read_resolving_list_size); 4707 return true; 4708 case LE_RESOLVING_LIST_SEND_CLEAR: 4709 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4710 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4711 sizeof(hci_stack->le_resolving_list_add_entries)); 4712 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4713 sizeof(hci_stack->le_resolving_list_remove_entries)); 4714 hci_send_cmd(&hci_le_clear_resolving_list); 4715 return true; 4716 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4717 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4718 uint8_t offset = i >> 3; 4719 uint8_t mask = 1 << (i & 7); 4720 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4721 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4722 bd_addr_t peer_identity_addreses; 4723 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4724 sm_key_t peer_irk; 4725 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4726 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4727 4728 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4729 // trigger whitelist entry 'update' (work around for controller bug) 4730 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4731 while (btstack_linked_list_iterator_has_next(&lit)) { 4732 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4733 if (entry->address_type != peer_identity_addr_type) continue; 4734 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4735 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4736 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4737 } 4738 #endif 4739 4740 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4741 peer_identity_addreses); 4742 return true; 4743 } 4744 4745 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4746 4747 /* fall through */ 4748 4749 case LE_RESOLVING_LIST_ADD_ENTRIES: 4750 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4751 uint8_t offset = i >> 3; 4752 uint8_t mask = 1 << (i & 7); 4753 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4754 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4755 bd_addr_t peer_identity_addreses; 4756 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4757 sm_key_t peer_irk; 4758 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4759 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4760 const uint8_t *local_irk = gap_get_persistent_irk(); 4761 // command uses format specifier 'P' that stores 16-byte value without flip 4762 uint8_t local_irk_flipped[16]; 4763 uint8_t peer_irk_flipped[16]; 4764 reverse_128(local_irk, local_irk_flipped); 4765 reverse_128(peer_irk, peer_irk_flipped); 4766 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4767 peer_irk_flipped, local_irk_flipped); 4768 return true; 4769 } 4770 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4771 break; 4772 4773 default: 4774 break; 4775 } 4776 } 4777 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4778 #endif 4779 4780 // post-pone all actions until stack is fully working 4781 if (hci_stack->state != HCI_STATE_WORKING) return false; 4782 4783 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4784 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4785 4786 // Phase 4: restore state 4787 4788 #ifdef ENABLE_LE_CENTRAL 4789 // re-start scanning 4790 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4791 hci_stack->le_scanning_active = true; 4792 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4793 return true; 4794 } 4795 #endif 4796 4797 #ifdef ENABLE_LE_CENTRAL 4798 // re-start connecting 4799 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4800 bd_addr_t null_addr; 4801 memset(null_addr, 0, 6); 4802 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4803 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4804 hci_send_cmd(&hci_le_create_connection, 4805 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4806 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4807 1, // use whitelist 4808 0, // peer address type 4809 null_addr, // peer bd addr 4810 hci_stack->le_connection_own_addr_type, // our addr type: 4811 hci_stack->le_connection_interval_min, // conn interval min 4812 hci_stack->le_connection_interval_max, // conn interval max 4813 hci_stack->le_connection_latency, // conn latency 4814 hci_stack->le_supervision_timeout, // conn latency 4815 hci_stack->le_minimum_ce_length, // min ce length 4816 hci_stack->le_maximum_ce_length // max ce length 4817 ); 4818 return true; 4819 } 4820 #endif 4821 4822 #ifdef ENABLE_LE_PERIPHERAL 4823 // re-start advertising 4824 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4825 // check if advertisements should be enabled given 4826 hci_stack->le_advertisements_active = true; 4827 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4828 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4829 return true; 4830 } 4831 #endif 4832 4833 return false; 4834 } 4835 #endif 4836 4837 static bool hci_run_general_pending_commands(void){ 4838 btstack_linked_item_t * it; 4839 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4840 hci_connection_t * connection = (hci_connection_t *) it; 4841 4842 switch(connection->state){ 4843 case SEND_CREATE_CONNECTION: 4844 switch(connection->address_type){ 4845 #ifdef ENABLE_CLASSIC 4846 case BD_ADDR_TYPE_ACL: 4847 log_info("sending hci_create_connection"); 4848 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4849 break; 4850 #endif 4851 default: 4852 #ifdef ENABLE_BLE 4853 #ifdef ENABLE_LE_CENTRAL 4854 log_info("sending hci_le_create_connection"); 4855 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4856 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4857 hci_send_cmd(&hci_le_create_connection, 4858 hci_stack->le_connection_scan_interval, // conn scan interval 4859 hci_stack->le_connection_scan_window, // conn scan windows 4860 0, // don't use whitelist 4861 connection->address_type, // peer address type 4862 connection->address, // peer bd addr 4863 hci_stack->le_connection_own_addr_type, // our addr type: 4864 hci_stack->le_connection_interval_min, // conn interval min 4865 hci_stack->le_connection_interval_max, // conn interval max 4866 hci_stack->le_connection_latency, // conn latency 4867 hci_stack->le_supervision_timeout, // conn latency 4868 hci_stack->le_minimum_ce_length, // min ce length 4869 hci_stack->le_maximum_ce_length // max ce length 4870 ); 4871 connection->state = SENT_CREATE_CONNECTION; 4872 #endif 4873 #endif 4874 break; 4875 } 4876 return true; 4877 4878 #ifdef ENABLE_CLASSIC 4879 case RECEIVED_CONNECTION_REQUEST: 4880 connection->role = HCI_ROLE_SLAVE; 4881 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4882 log_info("sending hci_accept_connection_request"); 4883 connection->state = ACCEPTED_CONNECTION_REQUEST; 4884 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4885 return true; 4886 } 4887 break; 4888 #endif 4889 4890 #ifdef ENABLE_BLE 4891 #ifdef ENABLE_LE_CENTRAL 4892 case SEND_CANCEL_CONNECTION: 4893 connection->state = SENT_CANCEL_CONNECTION; 4894 hci_send_cmd(&hci_le_create_connection_cancel); 4895 return true; 4896 #endif 4897 #endif 4898 case SEND_DISCONNECT: 4899 connection->state = SENT_DISCONNECT; 4900 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4901 return true; 4902 4903 default: 4904 break; 4905 } 4906 4907 // no further commands if connection is about to get shut down 4908 if (connection->state == SENT_DISCONNECT) continue; 4909 4910 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4911 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4912 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4913 return true; 4914 } 4915 4916 #ifdef ENABLE_CLASSIC 4917 4918 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4919 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4920 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4921 return true; 4922 } 4923 4924 // Handling link key request requires remote supported features 4925 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4926 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4927 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4928 4929 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4930 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4931 if (have_link_key && security_level_sufficient){ 4932 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4933 } else { 4934 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4935 } 4936 return true; 4937 } 4938 4939 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4940 log_info("denying to pin request"); 4941 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4942 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4943 return true; 4944 } 4945 4946 // security assessment requires remote features 4947 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4948 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4949 hci_ssp_assess_security_on_io_cap_request(connection); 4950 // 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 4951 } 4952 4953 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4954 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4955 // set authentication requirements: 4956 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4957 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4958 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4959 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4960 authreq |= 1; 4961 } 4962 bool bonding = hci_stack->bondable; 4963 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4964 // if we have received IO Cap Response, we're in responder role 4965 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4966 if (bonding && !remote_bonding){ 4967 log_info("Remote not bonding, dropping local flag"); 4968 bonding = false; 4969 } 4970 } 4971 if (bonding){ 4972 if (connection->bonding_flags & BONDING_DEDICATED){ 4973 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4974 } else { 4975 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4976 } 4977 } 4978 uint8_t have_oob_data = 0; 4979 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4980 if (connection->classic_oob_c_192 != NULL){ 4981 have_oob_data |= 1; 4982 } 4983 if (connection->classic_oob_c_256 != NULL){ 4984 have_oob_data |= 2; 4985 } 4986 #endif 4987 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4988 return true; 4989 } 4990 4991 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4992 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4993 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4994 return true; 4995 } 4996 4997 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4998 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4999 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5000 const uint8_t zero[16] = { 0 }; 5001 const uint8_t * r_192 = zero; 5002 const uint8_t * c_192 = zero; 5003 const uint8_t * r_256 = zero; 5004 const uint8_t * c_256 = zero; 5005 // verify P-256 OOB 5006 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5007 c_256 = connection->classic_oob_c_256; 5008 if (connection->classic_oob_r_256 != NULL) { 5009 r_256 = connection->classic_oob_r_256; 5010 } 5011 } 5012 // verify P-192 OOB 5013 if ((connection->classic_oob_c_192 != NULL)) { 5014 c_192 = connection->classic_oob_c_192; 5015 if (connection->classic_oob_r_192 != NULL) { 5016 r_192 = connection->classic_oob_r_192; 5017 } 5018 } 5019 5020 // assess security 5021 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5022 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5023 if (need_level_4 && !can_reach_level_4){ 5024 log_info("Level 4 required, but not possible -> abort"); 5025 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5026 // send oob negative reply 5027 c_256 = NULL; 5028 c_192 = NULL; 5029 } 5030 5031 // Reply 5032 if (c_256 != zero) { 5033 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5034 } else if (c_192 != zero){ 5035 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5036 } else { 5037 hci_stack->classic_oob_con_handle = connection->con_handle; 5038 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5039 } 5040 return true; 5041 } 5042 #endif 5043 5044 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5045 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5046 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5047 return true; 5048 } 5049 5050 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5051 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5052 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5053 return true; 5054 } 5055 5056 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5057 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5058 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5059 return true; 5060 } 5061 5062 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5063 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5064 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5065 connection->state = SENT_DISCONNECT; 5066 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5067 return true; 5068 } 5069 5070 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5071 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5072 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5073 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5074 return true; 5075 } 5076 5077 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5078 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5079 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5080 return true; 5081 } 5082 5083 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5084 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5085 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5086 return true; 5087 } 5088 5089 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5090 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5091 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5092 return true; 5093 } 5094 5095 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5096 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5097 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5098 return true; 5099 } 5100 5101 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5102 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5103 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5104 return true; 5105 } 5106 #endif 5107 5108 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5109 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5110 #ifdef ENABLE_CLASSIC 5111 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5112 #endif 5113 if (connection->state != SENT_DISCONNECT){ 5114 connection->state = SENT_DISCONNECT; 5115 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5116 return true; 5117 } 5118 } 5119 5120 #ifdef ENABLE_CLASSIC 5121 uint16_t sniff_min_interval; 5122 switch (connection->sniff_min_interval){ 5123 case 0: 5124 break; 5125 case 0xffff: 5126 connection->sniff_min_interval = 0; 5127 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5128 return true; 5129 default: 5130 sniff_min_interval = connection->sniff_min_interval; 5131 connection->sniff_min_interval = 0; 5132 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5133 return true; 5134 } 5135 5136 if (connection->sniff_subrating_max_latency != 0xffff){ 5137 uint16_t max_latency = connection->sniff_subrating_max_latency; 5138 connection->sniff_subrating_max_latency = 0; 5139 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5140 return true; 5141 } 5142 5143 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5144 uint8_t service_type = (uint8_t) connection->qos_service_type; 5145 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5146 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); 5147 return true; 5148 } 5149 5150 if (connection->request_role != HCI_ROLE_INVALID){ 5151 hci_role_t role = connection->request_role; 5152 connection->request_role = HCI_ROLE_INVALID; 5153 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5154 return true; 5155 } 5156 #endif 5157 5158 #ifdef ENABLE_BLE 5159 switch (connection->le_con_parameter_update_state){ 5160 // response to L2CAP CON PARAMETER UPDATE REQUEST 5161 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5162 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5163 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5164 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5165 0x0000, 0xffff); 5166 return true; 5167 case CON_PARAMETER_UPDATE_REPLY: 5168 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5169 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5170 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5171 0x0000, 0xffff); 5172 return true; 5173 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5174 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5175 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5176 return true; 5177 default: 5178 break; 5179 } 5180 if (connection->le_phy_update_all_phys != 0xffu){ 5181 uint8_t all_phys = connection->le_phy_update_all_phys; 5182 connection->le_phy_update_all_phys = 0xff; 5183 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); 5184 return true; 5185 } 5186 #endif 5187 } 5188 return false; 5189 } 5190 5191 static void hci_run(void){ 5192 5193 // stack state sub statemachines 5194 // halting needs to be called even if we cannot send command packet now 5195 switch (hci_stack->state) { 5196 case HCI_STATE_INITIALIZING: 5197 hci_initializing_run(); 5198 break; 5199 case HCI_STATE_HALTING: 5200 hci_halting_run(); 5201 break; 5202 case HCI_STATE_FALLING_ASLEEP: 5203 hci_falling_asleep_run(); 5204 break; 5205 default: 5206 break; 5207 } 5208 5209 bool done; 5210 5211 // send continuation fragments first, as they block the prepared packet buffer 5212 done = hci_run_acl_fragments(); 5213 if (done) return; 5214 5215 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5216 // send host num completed packets next as they don't require num_cmd_packets > 0 5217 if (!hci_can_send_comand_packet_transport()) return; 5218 if (hci_stack->host_completed_packets){ 5219 hci_host_num_completed_packets(); 5220 return; 5221 } 5222 #endif 5223 5224 if (!hci_can_send_command_packet_now()) return; 5225 5226 // global/non-connection oriented commands 5227 5228 5229 #ifdef ENABLE_CLASSIC 5230 // general gap classic 5231 done = hci_run_general_gap_classic(); 5232 if (done) return; 5233 #endif 5234 5235 #ifdef ENABLE_BLE 5236 // general gap le 5237 done = hci_run_general_gap_le(); 5238 if (done) return; 5239 #endif 5240 5241 // send pending HCI commands 5242 hci_run_general_pending_commands(); 5243 } 5244 5245 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5246 // house-keeping 5247 5248 #ifdef ENABLE_CLASSIC 5249 bd_addr_t addr; 5250 hci_connection_t * conn; 5251 #endif 5252 #ifdef ENABLE_LE_CENTRAL 5253 uint8_t initiator_filter_policy; 5254 #endif 5255 5256 uint16_t opcode = little_endian_read_16(packet, 0); 5257 switch (opcode) { 5258 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5259 hci_stack->loopback_mode = packet[3]; 5260 break; 5261 5262 #ifdef ENABLE_CLASSIC 5263 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5264 reverse_bd_addr(&packet[3], addr); 5265 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5266 5267 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5268 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5269 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5270 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5271 } 5272 5273 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5274 if (!conn) { 5275 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5276 if (!conn) { 5277 // notify client that alloc failed 5278 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5279 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5280 } 5281 conn->state = SEND_CREATE_CONNECTION; 5282 conn->role = HCI_ROLE_MASTER; 5283 } 5284 5285 conn->con_handle = HCI_CON_HANDLE_INVALID; 5286 conn->role = HCI_ROLE_INVALID; 5287 5288 log_info("conn state %u", conn->state); 5289 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5290 switch (conn->state) { 5291 // if connection active exists 5292 case OPEN: 5293 // and OPEN, emit connection complete command 5294 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5295 // packet not sent to controller 5296 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5297 case RECEIVED_DISCONNECTION_COMPLETE: 5298 // create connection triggered in disconnect complete event, let's do it now 5299 break; 5300 case SEND_CREATE_CONNECTION: 5301 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5302 break; 5303 default: 5304 // otherwise, just ignore as it is already in the open process 5305 // packet not sent to controller 5306 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5307 } 5308 conn->state = SENT_CREATE_CONNECTION; 5309 5310 // track outgoing connection 5311 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5312 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5313 break; 5314 5315 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5316 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5317 // setup_synchronous_connection? Voice setting at offset 22 5318 // TODO: compare to current setting if sco connection already active 5319 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5320 break; 5321 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5322 // accept_synchronous_connection? Voice setting at offset 18 5323 // TODO: compare to current setting if sco connection already active 5324 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5325 // track outgoing connection 5326 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5327 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5328 break; 5329 #endif 5330 #endif 5331 5332 #ifdef ENABLE_BLE 5333 #ifdef ENABLE_LE_CENTRAL 5334 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5335 // white list used? 5336 initiator_filter_policy = packet[7]; 5337 switch (initiator_filter_policy) { 5338 case 0: 5339 // whitelist not used 5340 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5341 break; 5342 case 1: 5343 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5344 break; 5345 default: 5346 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5347 break; 5348 } 5349 // track outgoing connection 5350 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5351 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5352 break; 5353 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5354 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5355 break; 5356 #endif 5357 #endif 5358 default: 5359 break; 5360 } 5361 5362 hci_stack->num_cmd_packets--; 5363 5364 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5365 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5366 if (err != 0){ 5367 return ERROR_CODE_HARDWARE_FAILURE; 5368 } 5369 return ERROR_CODE_SUCCESS; 5370 } 5371 5372 // disconnect because of security block 5373 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5374 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5375 if (!connection) return; 5376 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5377 } 5378 5379 5380 // Configure Secure Simple Pairing 5381 5382 #ifdef ENABLE_CLASSIC 5383 5384 // enable will enable SSP during init 5385 void gap_ssp_set_enable(int enable){ 5386 hci_stack->ssp_enable = enable; 5387 } 5388 5389 static int hci_local_ssp_activated(void){ 5390 return gap_ssp_supported() && hci_stack->ssp_enable; 5391 } 5392 5393 // if set, BTstack will respond to io capability request using authentication requirement 5394 void gap_ssp_set_io_capability(int io_capability){ 5395 hci_stack->ssp_io_capability = io_capability; 5396 } 5397 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5398 hci_stack->ssp_authentication_requirement = authentication_requirement; 5399 } 5400 5401 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5402 void gap_ssp_set_auto_accept(int auto_accept){ 5403 hci_stack->ssp_auto_accept = auto_accept; 5404 } 5405 5406 void gap_secure_connections_enable(bool enable){ 5407 hci_stack->secure_connections_enable = enable; 5408 } 5409 5410 #endif 5411 5412 // va_list part of hci_send_cmd 5413 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5414 if (!hci_can_send_command_packet_now()){ 5415 log_error("hci_send_cmd called but cannot send packet now"); 5416 return ERROR_CODE_COMMAND_DISALLOWED; 5417 } 5418 5419 // for HCI INITIALIZATION 5420 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5421 hci_stack->last_cmd_opcode = cmd->opcode; 5422 5423 hci_reserve_packet_buffer(); 5424 uint8_t * packet = hci_stack->hci_packet_buffer; 5425 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5426 uint8_t status = hci_send_cmd_packet(packet, size); 5427 5428 // release packet buffer on error or for synchronous transport implementations 5429 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5430 hci_release_packet_buffer(); 5431 hci_emit_transport_packet_sent(); 5432 } 5433 5434 return status; 5435 } 5436 5437 /** 5438 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5439 */ 5440 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5441 va_list argptr; 5442 va_start(argptr, cmd); 5443 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5444 va_end(argptr); 5445 return status; 5446 } 5447 5448 // Create various non-HCI events. 5449 // TODO: generalize, use table similar to hci_create_command 5450 5451 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5452 // dump packet 5453 if (dump) { 5454 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5455 } 5456 5457 // dispatch to all event handlers 5458 btstack_linked_list_iterator_t it; 5459 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5460 while (btstack_linked_list_iterator_has_next(&it)){ 5461 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5462 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5463 } 5464 } 5465 5466 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5467 if (!hci_stack->acl_packet_handler) return; 5468 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5469 } 5470 5471 #ifdef ENABLE_CLASSIC 5472 static void hci_notify_if_sco_can_send_now(void){ 5473 // notify SCO sender if waiting 5474 if (!hci_stack->sco_waiting_for_can_send_now) return; 5475 if (hci_can_send_sco_packet_now()){ 5476 hci_stack->sco_waiting_for_can_send_now = 0; 5477 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5478 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5479 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5480 } 5481 } 5482 5483 // parsing end emitting has been merged to reduce code size 5484 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5485 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5486 5487 uint8_t * eir_data; 5488 ad_context_t context; 5489 const uint8_t * name; 5490 uint8_t name_len; 5491 5492 if (size < 3) return; 5493 5494 int event_type = hci_event_packet_get_type(packet); 5495 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5496 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5497 5498 switch (event_type){ 5499 case HCI_EVENT_INQUIRY_RESULT: 5500 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5501 if (size != (3 + (num_responses * 14))) return; 5502 break; 5503 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5504 if (size != 257) return; 5505 if (num_responses != 1) return; 5506 break; 5507 default: 5508 return; 5509 } 5510 5511 // event[1] is set at the end 5512 int i; 5513 for (i=0; i<num_responses;i++){ 5514 memset(event, 0, sizeof(event)); 5515 event[0] = GAP_EVENT_INQUIRY_RESULT; 5516 uint8_t event_size = 27; // if name is not set by EIR 5517 5518 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5519 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5520 (void)memcpy(&event[9], 5521 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5522 3); // class of device 5523 (void)memcpy(&event[12], 5524 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5525 2); // clock offset 5526 5527 switch (event_type){ 5528 case HCI_EVENT_INQUIRY_RESULT: 5529 // 14,15,16,17 = 0, size 18 5530 break; 5531 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5532 event[14] = 1; 5533 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5534 // 16,17 = 0, size 18 5535 break; 5536 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5537 event[14] = 1; 5538 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5539 // EIR packets only contain a single inquiry response 5540 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5541 name = NULL; 5542 // Iterate over EIR data 5543 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5544 uint8_t data_type = ad_iterator_get_data_type(&context); 5545 uint8_t data_size = ad_iterator_get_data_len(&context); 5546 const uint8_t * data = ad_iterator_get_data(&context); 5547 // Prefer Complete Local Name over Shortened Local Name 5548 switch (data_type){ 5549 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5550 if (name) continue; 5551 /* fall through */ 5552 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5553 name = data; 5554 name_len = data_size; 5555 break; 5556 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5557 if (data_size != 8) break; 5558 event[16] = 1; 5559 memcpy(&event[17], data, 8); 5560 break; 5561 default: 5562 break; 5563 } 5564 } 5565 if (name){ 5566 event[25] = 1; 5567 // truncate name if needed 5568 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5569 event[26] = len; 5570 (void)memcpy(&event[27], name, len); 5571 event_size += len; 5572 } 5573 break; 5574 default: 5575 return; 5576 } 5577 event[1] = event_size - 2; 5578 hci_emit_event(event, event_size, 1); 5579 } 5580 } 5581 #endif 5582 5583 void hci_emit_state(void){ 5584 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5585 uint8_t event[3]; 5586 event[0] = BTSTACK_EVENT_STATE; 5587 event[1] = sizeof(event) - 2u; 5588 event[2] = hci_stack->state; 5589 hci_emit_event(event, sizeof(event), 1); 5590 } 5591 5592 #ifdef ENABLE_CLASSIC 5593 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5594 uint8_t event[13]; 5595 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5596 event[1] = sizeof(event) - 2; 5597 event[2] = status; 5598 little_endian_store_16(event, 3, con_handle); 5599 reverse_bd_addr(address, &event[5]); 5600 event[11] = 1; // ACL connection 5601 event[12] = 0; // encryption disabled 5602 hci_emit_event(event, sizeof(event), 1); 5603 } 5604 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5605 if (disable_l2cap_timeouts) return; 5606 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5607 uint8_t event[4]; 5608 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5609 event[1] = sizeof(event) - 2; 5610 little_endian_store_16(event, 2, conn->con_handle); 5611 hci_emit_event(event, sizeof(event), 1); 5612 } 5613 #endif 5614 5615 #ifdef ENABLE_BLE 5616 #ifdef ENABLE_LE_CENTRAL 5617 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){ 5618 uint8_t event[21]; 5619 event[0] = HCI_EVENT_LE_META; 5620 event[1] = sizeof(event) - 2u; 5621 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5622 event[3] = status; 5623 little_endian_store_16(event, 4, con_handle); 5624 event[6] = 0; // TODO: role 5625 event[7] = address_type; 5626 reverse_bd_addr(address, &event[8]); 5627 little_endian_store_16(event, 14, 0); // interval 5628 little_endian_store_16(event, 16, 0); // latency 5629 little_endian_store_16(event, 18, 0); // supervision timeout 5630 event[20] = 0; // master clock accuracy 5631 hci_emit_event(event, sizeof(event), 1); 5632 } 5633 #endif 5634 #endif 5635 5636 static void hci_emit_transport_packet_sent(void){ 5637 // notify upper stack that it might be possible to send again 5638 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5639 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5640 } 5641 5642 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5643 uint8_t event[6]; 5644 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5645 event[1] = sizeof(event) - 2u; 5646 event[2] = 0; // status = OK 5647 little_endian_store_16(event, 3, con_handle); 5648 event[5] = reason; 5649 hci_emit_event(event, sizeof(event), 1); 5650 } 5651 5652 static void hci_emit_nr_connections_changed(void){ 5653 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5654 uint8_t event[3]; 5655 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5656 event[1] = sizeof(event) - 2u; 5657 event[2] = nr_hci_connections(); 5658 hci_emit_event(event, sizeof(event), 1); 5659 } 5660 5661 static void hci_emit_hci_open_failed(void){ 5662 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5663 uint8_t event[2]; 5664 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5665 event[1] = sizeof(event) - 2u; 5666 hci_emit_event(event, sizeof(event), 1); 5667 } 5668 5669 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5670 log_info("hci_emit_dedicated_bonding_result %u ", status); 5671 uint8_t event[9]; 5672 int pos = 0; 5673 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5674 event[pos++] = sizeof(event) - 2u; 5675 event[pos++] = status; 5676 reverse_bd_addr(address, &event[pos]); 5677 hci_emit_event(event, sizeof(event), 1); 5678 } 5679 5680 5681 #ifdef ENABLE_CLASSIC 5682 5683 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5684 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5685 uint8_t event[5]; 5686 int pos = 0; 5687 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5688 event[pos++] = sizeof(event) - 2; 5689 little_endian_store_16(event, 2, con_handle); 5690 pos += 2; 5691 event[pos++] = level; 5692 hci_emit_event(event, sizeof(event), 1); 5693 } 5694 5695 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5696 if (!connection) return LEVEL_0; 5697 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5698 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5699 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5700 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5701 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5702 // LEVEL 4 always requires 128 bit encrytion key size 5703 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5704 security_level = LEVEL_3; 5705 } 5706 return security_level; 5707 } 5708 5709 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5710 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5711 uint8_t event[3]; 5712 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5713 event[1] = sizeof(event) - 2; 5714 event[2] = enabled; 5715 hci_emit_event(event, sizeof(event), 1); 5716 } 5717 5718 // query if remote side supports eSCO 5719 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5720 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5721 if (!connection) return false; 5722 return (connection->remote_supported_features[0] & 1) != 0; 5723 } 5724 5725 static bool hci_ssp_supported(hci_connection_t * connection){ 5726 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5727 return (connection->bonding_flags & mask) == mask; 5728 } 5729 5730 // query if remote side supports SSP 5731 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5732 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5733 if (!connection) return false; 5734 return hci_ssp_supported(connection) ? 1 : 0; 5735 } 5736 5737 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5738 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5739 } 5740 5741 /** 5742 * Check if remote supported features query has completed 5743 */ 5744 bool hci_remote_features_available(hci_con_handle_t handle){ 5745 hci_connection_t * connection = hci_connection_for_handle(handle); 5746 if (!connection) return false; 5747 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5748 } 5749 5750 /** 5751 * Trigger remote supported features query 5752 */ 5753 5754 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5755 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5756 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5757 } 5758 } 5759 5760 void hci_remote_features_query(hci_con_handle_t con_handle){ 5761 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5762 if (!connection) return; 5763 hci_trigger_remote_features_for_connection(connection); 5764 hci_run(); 5765 } 5766 5767 // GAP API 5768 /** 5769 * @bbrief enable/disable bonding. default is enabled 5770 * @praram enabled 5771 */ 5772 void gap_set_bondable_mode(int enable){ 5773 hci_stack->bondable = enable ? 1 : 0; 5774 } 5775 /** 5776 * @brief Get bondable mode. 5777 * @return 1 if bondable 5778 */ 5779 int gap_get_bondable_mode(void){ 5780 return hci_stack->bondable; 5781 } 5782 5783 /** 5784 * @brief map link keys to security levels 5785 */ 5786 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5787 switch (link_key_type){ 5788 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5789 return LEVEL_4; 5790 case COMBINATION_KEY: 5791 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5792 return LEVEL_3; 5793 default: 5794 return LEVEL_2; 5795 } 5796 } 5797 5798 /** 5799 * @brief map link keys to secure connection yes/no 5800 */ 5801 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5802 switch (link_key_type){ 5803 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5804 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5805 return true; 5806 default: 5807 return false; 5808 } 5809 } 5810 5811 /** 5812 * @brief map link keys to authenticated 5813 */ 5814 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5815 switch (link_key_type){ 5816 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5817 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5818 return true; 5819 default: 5820 return false; 5821 } 5822 } 5823 5824 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5825 log_info("gap_mitm_protection_required_for_security_level %u", level); 5826 return level > LEVEL_2; 5827 } 5828 5829 /** 5830 * @brief get current security level 5831 */ 5832 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5833 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5834 if (!connection) return LEVEL_0; 5835 return gap_security_level_for_connection(connection); 5836 } 5837 5838 /** 5839 * @brief request connection to device to 5840 * @result GAP_AUTHENTICATION_RESULT 5841 */ 5842 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5843 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5844 if (!connection){ 5845 hci_emit_security_level(con_handle, LEVEL_0); 5846 return; 5847 } 5848 5849 btstack_assert(hci_is_le_connection(connection) == false); 5850 5851 // 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) 5852 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5853 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5854 requested_level = LEVEL_4; 5855 } 5856 5857 gap_security_level_t current_level = gap_security_level(con_handle); 5858 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5859 requested_level, connection->requested_security_level, current_level); 5860 5861 // authentication active if authentication request was sent or planned level > 0 5862 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5863 if (authentication_active){ 5864 // authentication already active 5865 if (connection->requested_security_level < requested_level){ 5866 // increase requested level as new level is higher 5867 // TODO: handle re-authentication when done 5868 connection->requested_security_level = requested_level; 5869 } 5870 } else { 5871 // no request active, notify if security sufficient 5872 if (requested_level <= current_level){ 5873 hci_emit_security_level(con_handle, current_level); 5874 return; 5875 } 5876 5877 // store request 5878 connection->requested_security_level = requested_level; 5879 5880 // request remote features if not already active 5881 hci_remote_features_query(con_handle); 5882 5883 // start to authenticate connection 5884 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5885 hci_run(); 5886 } 5887 } 5888 5889 /** 5890 * @brief start dedicated bonding with device. disconnect after bonding 5891 * @param device 5892 * @param request MITM protection 5893 * @result GAP_DEDICATED_BONDING_COMPLETE 5894 */ 5895 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5896 5897 // create connection state machine 5898 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5899 5900 if (!connection){ 5901 return BTSTACK_MEMORY_ALLOC_FAILED; 5902 } 5903 5904 // delete linkn key 5905 gap_drop_link_key_for_bd_addr(device); 5906 5907 // configure LEVEL_2/3, dedicated bonding 5908 connection->state = SEND_CREATE_CONNECTION; 5909 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5910 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5911 connection->bonding_flags = BONDING_DEDICATED; 5912 5913 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5914 5915 // handle: connnection failure (connection complete != ok) 5916 // handle: authentication failure 5917 // handle: disconnect on done 5918 5919 hci_run(); 5920 5921 return 0; 5922 } 5923 5924 void gap_set_local_name(const char * local_name){ 5925 hci_stack->local_name = local_name; 5926 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 5927 // also update EIR if not set by user 5928 if (hci_stack->eir_data == NULL){ 5929 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 5930 } 5931 hci_run(); 5932 } 5933 #endif 5934 5935 5936 #ifdef ENABLE_BLE 5937 5938 #ifdef ENABLE_LE_CENTRAL 5939 void gap_start_scan(void){ 5940 hci_stack->le_scanning_enabled = true; 5941 hci_run(); 5942 } 5943 5944 void gap_stop_scan(void){ 5945 hci_stack->le_scanning_enabled = false; 5946 hci_run(); 5947 } 5948 5949 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5950 hci_stack->le_scan_type = scan_type; 5951 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5952 hci_stack->le_scan_interval = scan_interval; 5953 hci_stack->le_scan_window = scan_window; 5954 hci_stack->le_scanning_param_update = true; 5955 hci_run(); 5956 } 5957 5958 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5959 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5960 } 5961 5962 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5963 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5964 if (!conn){ 5965 // disallow if le connection is already outgoing 5966 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5967 log_error("le connection already active"); 5968 return ERROR_CODE_COMMAND_DISALLOWED; 5969 } 5970 5971 log_info("gap_connect: no connection exists yet, creating context"); 5972 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5973 if (!conn){ 5974 // notify client that alloc failed 5975 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5976 log_info("gap_connect: failed to alloc hci_connection_t"); 5977 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5978 } 5979 5980 // set le connecting state 5981 if (hci_is_le_connection_type(addr_type)){ 5982 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5983 } 5984 5985 conn->state = SEND_CREATE_CONNECTION; 5986 log_info("gap_connect: send create connection next"); 5987 hci_run(); 5988 return ERROR_CODE_SUCCESS; 5989 } 5990 5991 if (!hci_is_le_connection(conn) || 5992 (conn->state == SEND_CREATE_CONNECTION) || 5993 (conn->state == SENT_CREATE_CONNECTION)) { 5994 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5995 log_error("gap_connect: classic connection or connect is already being created"); 5996 return GATT_CLIENT_IN_WRONG_STATE; 5997 } 5998 5999 // check if connection was just disconnected 6000 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6001 log_info("gap_connect: send create connection (again)"); 6002 conn->state = SEND_CREATE_CONNECTION; 6003 hci_run(); 6004 return ERROR_CODE_SUCCESS; 6005 } 6006 6007 log_info("gap_connect: context exists with state %u", conn->state); 6008 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6009 hci_run(); 6010 return ERROR_CODE_SUCCESS; 6011 } 6012 6013 // @assumption: only a single outgoing LE Connection exists 6014 static hci_connection_t * gap_get_outgoing_connection(void){ 6015 btstack_linked_item_t *it; 6016 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6017 hci_connection_t * conn = (hci_connection_t *) it; 6018 if (!hci_is_le_connection(conn)) continue; 6019 switch (conn->state){ 6020 case SEND_CREATE_CONNECTION: 6021 case SENT_CREATE_CONNECTION: 6022 case SENT_CANCEL_CONNECTION: 6023 return conn; 6024 default: 6025 break; 6026 }; 6027 } 6028 return NULL; 6029 } 6030 6031 uint8_t gap_connect_cancel(void){ 6032 hci_connection_t * conn = gap_get_outgoing_connection(); 6033 if (!conn) return 0; 6034 switch (conn->state){ 6035 case SEND_CREATE_CONNECTION: 6036 // skip sending create connection and emit event instead 6037 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6038 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6039 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6040 btstack_memory_hci_connection_free( conn ); 6041 break; 6042 case SENT_CREATE_CONNECTION: 6043 // request to send cancel connection 6044 conn->state = SEND_CANCEL_CONNECTION; 6045 hci_run(); 6046 break; 6047 default: 6048 break; 6049 } 6050 return 0; 6051 } 6052 #endif 6053 6054 #ifdef ENABLE_LE_CENTRAL 6055 /** 6056 * @brief Set connection parameters for outgoing connections 6057 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6058 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6059 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6060 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6061 * @param conn_latency, default: 4 6062 * @param supervision_timeout (unit: 10ms), default: 720 ms 6063 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6064 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6065 */ 6066 6067 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6068 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6069 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6070 hci_stack->le_connection_scan_interval = conn_scan_interval; 6071 hci_stack->le_connection_scan_window = conn_scan_window; 6072 hci_stack->le_connection_interval_min = conn_interval_min; 6073 hci_stack->le_connection_interval_max = conn_interval_max; 6074 hci_stack->le_connection_latency = conn_latency; 6075 hci_stack->le_supervision_timeout = supervision_timeout; 6076 hci_stack->le_minimum_ce_length = min_ce_length; 6077 hci_stack->le_maximum_ce_length = max_ce_length; 6078 } 6079 #endif 6080 6081 /** 6082 * @brief Updates the connection parameters for a given LE connection 6083 * @param handle 6084 * @param conn_interval_min (unit: 1.25ms) 6085 * @param conn_interval_max (unit: 1.25ms) 6086 * @param conn_latency 6087 * @param supervision_timeout (unit: 10ms) 6088 * @return 0 if ok 6089 */ 6090 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6091 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6092 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6093 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6094 connection->le_conn_interval_min = conn_interval_min; 6095 connection->le_conn_interval_max = conn_interval_max; 6096 connection->le_conn_latency = conn_latency; 6097 connection->le_supervision_timeout = supervision_timeout; 6098 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6099 hci_run(); 6100 return 0; 6101 } 6102 6103 /** 6104 * @brief Request an update of the connection parameter for a given LE connection 6105 * @param handle 6106 * @param conn_interval_min (unit: 1.25ms) 6107 * @param conn_interval_max (unit: 1.25ms) 6108 * @param conn_latency 6109 * @param supervision_timeout (unit: 10ms) 6110 * @return 0 if ok 6111 */ 6112 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6113 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6114 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6115 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6116 connection->le_conn_interval_min = conn_interval_min; 6117 connection->le_conn_interval_max = conn_interval_max; 6118 connection->le_conn_latency = conn_latency; 6119 connection->le_supervision_timeout = supervision_timeout; 6120 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6121 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6122 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6123 return 0; 6124 } 6125 6126 #ifdef ENABLE_LE_PERIPHERAL 6127 6128 /** 6129 * @brief Set Advertisement Data 6130 * @param advertising_data_length 6131 * @param advertising_data (max 31 octets) 6132 * @note data is not copied, pointer has to stay valid 6133 */ 6134 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6135 hci_stack->le_advertisements_data_len = advertising_data_length; 6136 hci_stack->le_advertisements_data = advertising_data; 6137 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6138 hci_run(); 6139 } 6140 6141 /** 6142 * @brief Set Scan Response Data 6143 * @param advertising_data_length 6144 * @param advertising_data (max 31 octets) 6145 * @note data is not copied, pointer has to stay valid 6146 */ 6147 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6148 hci_stack->le_scan_response_data_len = scan_response_data_length; 6149 hci_stack->le_scan_response_data = scan_response_data; 6150 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6151 hci_run(); 6152 } 6153 6154 /** 6155 * @brief Set Advertisement Parameters 6156 * @param adv_int_min 6157 * @param adv_int_max 6158 * @param adv_type 6159 * @param direct_address_type 6160 * @param direct_address 6161 * @param channel_map 6162 * @param filter_policy 6163 * 6164 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6165 */ 6166 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6167 uint8_t direct_address_typ, bd_addr_t direct_address, 6168 uint8_t channel_map, uint8_t filter_policy) { 6169 6170 hci_stack->le_advertisements_interval_min = adv_int_min; 6171 hci_stack->le_advertisements_interval_max = adv_int_max; 6172 hci_stack->le_advertisements_type = adv_type; 6173 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6174 hci_stack->le_advertisements_channel_map = channel_map; 6175 hci_stack->le_advertisements_filter_policy = filter_policy; 6176 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6177 6); 6178 6179 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6180 hci_run(); 6181 } 6182 6183 /** 6184 * @brief Enable/Disable Advertisements 6185 * @param enabled 6186 */ 6187 void gap_advertisements_enable(int enabled){ 6188 hci_stack->le_advertisements_enabled = enabled != 0; 6189 hci_update_advertisements_enabled_for_current_roles(); 6190 hci_run(); 6191 } 6192 6193 #endif 6194 6195 void hci_le_set_own_address_type(uint8_t own_address_type){ 6196 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6197 if (own_address_type == hci_stack->le_own_addr_type) return; 6198 hci_stack->le_own_addr_type = own_address_type; 6199 6200 #ifdef ENABLE_LE_PERIPHERAL 6201 // update advertisement parameters, too 6202 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6203 hci_run(); 6204 #endif 6205 #ifdef ENABLE_LE_CENTRAL 6206 // note: we don't update scan parameters or modify ongoing connection attempts 6207 #endif 6208 } 6209 6210 void hci_le_random_address_set(const bd_addr_t random_address){ 6211 memcpy(hci_stack->le_random_address, random_address, 6); 6212 hci_stack->le_random_address_set = true; 6213 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6214 hci_run(); 6215 } 6216 6217 #endif 6218 6219 uint8_t gap_disconnect(hci_con_handle_t handle){ 6220 hci_connection_t * conn = hci_connection_for_handle(handle); 6221 if (!conn){ 6222 hci_emit_disconnection_complete(handle, 0); 6223 return 0; 6224 } 6225 // ignore if already disconnected 6226 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6227 return 0; 6228 } 6229 conn->state = SEND_DISCONNECT; 6230 hci_run(); 6231 return 0; 6232 } 6233 6234 int gap_read_rssi(hci_con_handle_t con_handle){ 6235 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6236 if (hci_connection == NULL) return 0; 6237 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6238 hci_run(); 6239 return 1; 6240 } 6241 6242 /** 6243 * @brief Get connection type 6244 * @param con_handle 6245 * @result connection_type 6246 */ 6247 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6248 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6249 if (!conn) return GAP_CONNECTION_INVALID; 6250 switch (conn->address_type){ 6251 case BD_ADDR_TYPE_LE_PUBLIC: 6252 case BD_ADDR_TYPE_LE_RANDOM: 6253 return GAP_CONNECTION_LE; 6254 case BD_ADDR_TYPE_SCO: 6255 return GAP_CONNECTION_SCO; 6256 case BD_ADDR_TYPE_ACL: 6257 return GAP_CONNECTION_ACL; 6258 default: 6259 return GAP_CONNECTION_INVALID; 6260 } 6261 } 6262 6263 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6264 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6265 if (!conn) return HCI_ROLE_INVALID; 6266 return (hci_role_t) conn->role; 6267 } 6268 6269 6270 #ifdef ENABLE_CLASSIC 6271 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6272 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6273 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6274 conn->request_role = role; 6275 hci_run(); 6276 return ERROR_CODE_SUCCESS; 6277 } 6278 #endif 6279 6280 #ifdef ENABLE_BLE 6281 6282 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){ 6283 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6284 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6285 6286 conn->le_phy_update_all_phys = all_phys; 6287 conn->le_phy_update_tx_phys = tx_phys; 6288 conn->le_phy_update_rx_phys = rx_phys; 6289 conn->le_phy_update_phy_options = phy_options; 6290 6291 hci_run(); 6292 6293 return 0; 6294 } 6295 6296 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6297 // check if already in list 6298 btstack_linked_list_iterator_t it; 6299 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6300 while (btstack_linked_list_iterator_has_next(&it)) { 6301 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6302 if (entry->address_type != address_type) { 6303 continue; 6304 } 6305 if (memcmp(entry->address, address, 6) != 0) { 6306 continue; 6307 } 6308 // disallow if already scheduled to add 6309 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6310 return ERROR_CODE_COMMAND_DISALLOWED; 6311 } 6312 // still on controller, but scheduled to remove -> re-add 6313 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6314 return ERROR_CODE_SUCCESS; 6315 } 6316 // alloc and add to list 6317 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6318 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6319 entry->address_type = address_type; 6320 (void)memcpy(entry->address, address, 6); 6321 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6322 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6323 return ERROR_CODE_SUCCESS; 6324 } 6325 6326 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6327 btstack_linked_list_iterator_t it; 6328 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6329 while (btstack_linked_list_iterator_has_next(&it)){ 6330 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6331 if (entry->address_type != address_type) { 6332 continue; 6333 } 6334 if (memcmp(entry->address, address, 6) != 0) { 6335 continue; 6336 } 6337 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6338 // remove from controller if already present 6339 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6340 } else { 6341 // directly remove entry from whitelist 6342 btstack_linked_list_iterator_remove(&it); 6343 btstack_memory_whitelist_entry_free(entry); 6344 } 6345 return ERROR_CODE_SUCCESS; 6346 } 6347 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6348 } 6349 6350 static void hci_whitelist_clear(void){ 6351 btstack_linked_list_iterator_t it; 6352 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6353 while (btstack_linked_list_iterator_has_next(&it)){ 6354 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6355 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6356 // remove from controller if already present 6357 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6358 continue; 6359 } 6360 // directly remove entry from whitelist 6361 btstack_linked_list_iterator_remove(&it); 6362 btstack_memory_whitelist_entry_free(entry); 6363 } 6364 } 6365 6366 // free all entries unconditionally 6367 static void hci_whitelist_free(void){ 6368 btstack_linked_list_iterator_t lit; 6369 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6370 while (btstack_linked_list_iterator_has_next(&lit)){ 6371 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6372 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6373 btstack_memory_whitelist_entry_free(entry); 6374 } 6375 } 6376 6377 /** 6378 * @brief Clear Whitelist 6379 * @return 0 if ok 6380 */ 6381 uint8_t gap_whitelist_clear(void){ 6382 hci_whitelist_clear(); 6383 hci_run(); 6384 return ERROR_CODE_SUCCESS; 6385 } 6386 6387 /** 6388 * @brief Add Device to Whitelist 6389 * @param address_typ 6390 * @param address 6391 * @return 0 if ok 6392 */ 6393 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6394 uint8_t status = hci_whitelist_add(address_type, address); 6395 if (status){ 6396 return status; 6397 } 6398 hci_run(); 6399 return ERROR_CODE_SUCCESS; 6400 } 6401 6402 /** 6403 * @brief Remove Device from Whitelist 6404 * @param address_typ 6405 * @param address 6406 * @return 0 if ok 6407 */ 6408 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6409 uint8_t status = hci_whitelist_remove(address_type, address); 6410 if (status){ 6411 return status; 6412 } 6413 hci_run(); 6414 return ERROR_CODE_SUCCESS; 6415 } 6416 6417 #ifdef ENABLE_LE_CENTRAL 6418 /** 6419 * @brief Connect with Whitelist 6420 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6421 * @return - if ok 6422 */ 6423 uint8_t gap_connect_with_whitelist(void){ 6424 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6425 return ERROR_CODE_COMMAND_DISALLOWED; 6426 } 6427 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6428 hci_run(); 6429 return ERROR_CODE_SUCCESS; 6430 } 6431 6432 /** 6433 * @brief Auto Connection Establishment - Start Connecting to device 6434 * @param address_typ 6435 * @param address 6436 * @return 0 if ok 6437 */ 6438 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6439 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6440 return ERROR_CODE_COMMAND_DISALLOWED; 6441 } 6442 6443 uint8_t status = hci_whitelist_add(address_type, address); 6444 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6445 return status; 6446 } 6447 6448 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6449 6450 hci_run(); 6451 return ERROR_CODE_SUCCESS; 6452 } 6453 6454 /** 6455 * @brief Auto Connection Establishment - Stop Connecting to device 6456 * @param address_typ 6457 * @param address 6458 * @return 0 if ok 6459 */ 6460 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6461 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6462 return ERROR_CODE_COMMAND_DISALLOWED; 6463 } 6464 6465 hci_whitelist_remove(address_type, address); 6466 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6467 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6468 } 6469 hci_run(); 6470 return 0; 6471 } 6472 6473 /** 6474 * @brief Auto Connection Establishment - Stop everything 6475 * @note Convenience function to stop all active auto connection attempts 6476 */ 6477 uint8_t gap_auto_connection_stop_all(void){ 6478 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6479 return ERROR_CODE_COMMAND_DISALLOWED; 6480 } 6481 hci_whitelist_clear(); 6482 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6483 hci_run(); 6484 return ERROR_CODE_SUCCESS; 6485 } 6486 6487 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6488 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6489 if (!conn) return 0; 6490 return conn->le_connection_interval; 6491 } 6492 #endif 6493 #endif 6494 6495 #ifdef ENABLE_CLASSIC 6496 /** 6497 * @brief Set Extended Inquiry Response data 6498 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6499 * @note has to be done before stack starts up 6500 */ 6501 void gap_set_extended_inquiry_response(const uint8_t * data){ 6502 hci_stack->eir_data = data; 6503 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6504 hci_run(); 6505 } 6506 6507 /** 6508 * @brief Start GAP Classic Inquiry 6509 * @param duration in 1.28s units 6510 * @return 0 if ok 6511 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6512 */ 6513 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6514 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6515 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6516 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6517 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6518 } 6519 hci_stack->inquiry_state = duration_in_1280ms_units; 6520 hci_run(); 6521 return 0; 6522 } 6523 6524 /** 6525 * @brief Stop GAP Classic Inquiry 6526 * @return 0 if ok 6527 */ 6528 int gap_inquiry_stop(void){ 6529 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6530 // emit inquiry complete event, before it even started 6531 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6532 hci_emit_event(event, sizeof(event), 1); 6533 return 0; 6534 } 6535 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6536 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6537 hci_run(); 6538 return 0; 6539 } 6540 6541 void gap_inquiry_set_lap(uint32_t lap){ 6542 hci_stack->inquiry_lap = lap; 6543 } 6544 6545 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6546 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6547 hci_stack->inquiry_scan_window = inquiry_scan_window; 6548 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6549 hci_run(); 6550 } 6551 6552 6553 /** 6554 * @brief Remote Name Request 6555 * @param addr 6556 * @param page_scan_repetition_mode 6557 * @param clock_offset only used when bit 15 is set 6558 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6559 */ 6560 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6561 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6562 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6563 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6564 hci_stack->remote_name_clock_offset = clock_offset; 6565 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6566 hci_run(); 6567 return 0; 6568 } 6569 6570 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6571 hci_stack->gap_pairing_state = state; 6572 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6573 hci_run(); 6574 return 0; 6575 } 6576 6577 /** 6578 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6579 * @param addr 6580 * @param pin_data 6581 * @param pin_len 6582 * @return 0 if ok 6583 */ 6584 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6585 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6586 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6587 hci_stack->gap_pairing_pin_len = pin_len; 6588 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6589 } 6590 6591 /** 6592 * @brief Legacy Pairing Pin Code Response 6593 * @param addr 6594 * @param pin 6595 * @return 0 if ok 6596 */ 6597 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6598 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6599 } 6600 6601 /** 6602 * @brief Abort Legacy Pairing 6603 * @param addr 6604 * @param pin 6605 * @return 0 if ok 6606 */ 6607 int gap_pin_code_negative(bd_addr_t addr){ 6608 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6609 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6610 } 6611 6612 /** 6613 * @brief SSP Passkey Response 6614 * @param addr 6615 * @param passkey 6616 * @return 0 if ok 6617 */ 6618 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6619 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6620 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6621 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6622 } 6623 6624 /** 6625 * @brief Abort SSP Passkey Entry/Pairing 6626 * @param addr 6627 * @param pin 6628 * @return 0 if ok 6629 */ 6630 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6631 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6632 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6633 } 6634 6635 /** 6636 * @brief Accept SSP Numeric Comparison 6637 * @param addr 6638 * @param passkey 6639 * @return 0 if ok 6640 */ 6641 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6642 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6643 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6644 } 6645 6646 /** 6647 * @brief Abort SSP Numeric Comparison/Pairing 6648 * @param addr 6649 * @param pin 6650 * @return 0 if ok 6651 */ 6652 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6653 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6654 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6655 } 6656 6657 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6658 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6659 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6660 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6661 connectionSetAuthenticationFlags(conn, flag); 6662 hci_run(); 6663 return ERROR_CODE_SUCCESS; 6664 } 6665 #endif 6666 6667 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6668 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6669 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6670 } 6671 6672 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6673 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6674 } 6675 #endif 6676 6677 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6678 /** 6679 * @brief Report Remote OOB Data 6680 * @param bd_addr 6681 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6682 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6683 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6684 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6685 */ 6686 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){ 6687 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6688 if (connection == NULL) { 6689 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6690 } 6691 connection->classic_oob_c_192 = c_192; 6692 connection->classic_oob_r_192 = r_192; 6693 6694 // ignore P-256 if not supported by us 6695 if (hci_stack->secure_connections_active){ 6696 connection->classic_oob_c_256 = c_256; 6697 connection->classic_oob_r_256 = r_256; 6698 } 6699 6700 return ERROR_CODE_SUCCESS; 6701 } 6702 /** 6703 * @brief Generate new OOB data 6704 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6705 */ 6706 void gap_ssp_generate_oob_data(void){ 6707 hci_stack->classic_read_local_oob_data = true; 6708 hci_run(); 6709 } 6710 6711 #endif 6712 6713 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6714 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6715 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6716 if (connection == NULL) { 6717 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6718 } 6719 6720 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6721 connection->link_key_type = type; 6722 6723 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6724 } 6725 6726 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6727 /** 6728 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6729 * @param inquiry_mode see bluetooth_defines.h 6730 */ 6731 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6732 hci_stack->inquiry_mode = inquiry_mode; 6733 } 6734 6735 /** 6736 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6737 */ 6738 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6739 hci_stack->sco_voice_setting = voice_setting; 6740 } 6741 6742 /** 6743 * @brief Get SCO Voice Setting 6744 * @return current voice setting 6745 */ 6746 uint16_t hci_get_sco_voice_setting(void){ 6747 return hci_stack->sco_voice_setting; 6748 } 6749 6750 static int hci_have_usb_transport(void){ 6751 if (!hci_stack->hci_transport) return 0; 6752 const char * transport_name = hci_stack->hci_transport->name; 6753 if (!transport_name) return 0; 6754 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6755 } 6756 6757 /** @brief Get SCO packet length for current SCO Voice setting 6758 * @note Using SCO packets of the exact length is required for USB transfer 6759 * @return Length of SCO packets in bytes (not audio frames) 6760 */ 6761 uint16_t hci_get_sco_packet_length(void){ 6762 uint16_t sco_packet_length = 0; 6763 6764 #ifdef ENABLE_SCO_OVER_HCI 6765 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6766 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6767 6768 if (hci_have_usb_transport()){ 6769 // see Core Spec for H2 USB Transfer. 6770 // 3 byte SCO header + 24 bytes per connection 6771 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6772 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6773 } else { 6774 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6775 sco_packet_length = 3 + 60 * multiplier; 6776 // assert that it still fits inside an SCO buffer 6777 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6778 sco_packet_length = 3 + 60; 6779 } 6780 } 6781 #endif 6782 6783 #ifdef HAVE_SCO_TRANSPORT 6784 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6785 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6786 sco_packet_length = 3 + 60 * multiplier; 6787 #endif 6788 return sco_packet_length; 6789 } 6790 6791 /** 6792 * @brief Sets the master/slave policy 6793 * @param policy (0: attempt to become master, 1: let connecting device decide) 6794 */ 6795 void hci_set_master_slave_policy(uint8_t policy){ 6796 hci_stack->master_slave_policy = policy; 6797 } 6798 6799 #endif 6800 6801 HCI_STATE hci_get_state(void){ 6802 return hci_stack->state; 6803 } 6804 6805 #ifdef ENABLE_CLASSIC 6806 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6807 hci_stack->gap_classic_accept_callback = accept_callback; 6808 } 6809 #endif 6810 6811 /** 6812 * @brief Set callback for Bluetooth Hardware Error 6813 */ 6814 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6815 hci_stack->hardware_error_callback = fn; 6816 } 6817 6818 void hci_disconnect_all(void){ 6819 btstack_linked_list_iterator_t it; 6820 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6821 while (btstack_linked_list_iterator_has_next(&it)){ 6822 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6823 if (con->state == SENT_DISCONNECT) continue; 6824 con->state = SEND_DISCONNECT; 6825 } 6826 hci_run(); 6827 } 6828 6829 uint16_t hci_get_manufacturer(void){ 6830 return hci_stack->manufacturer; 6831 } 6832 6833 #ifdef ENABLE_BLE 6834 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6835 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6836 if (!hci_con) return NULL; 6837 return &hci_con->sm_connection; 6838 } 6839 6840 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6841 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6842 #endif 6843 6844 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 6845 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6846 if (hci_connection == NULL) return 0; 6847 if (hci_is_le_connection(hci_connection)){ 6848 #ifdef ENABLE_BLE 6849 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6850 if (sm_conn->sm_connection_encrypted) { 6851 return sm_conn->sm_actual_encryption_key_size; 6852 } 6853 #endif 6854 } else { 6855 #ifdef ENABLE_CLASSIC 6856 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6857 return hci_connection->encryption_key_size; 6858 } 6859 #endif 6860 } 6861 return 0; 6862 } 6863 6864 bool gap_authenticated(hci_con_handle_t con_handle){ 6865 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6866 if (hci_connection == NULL) return false; 6867 6868 switch (hci_connection->address_type){ 6869 #ifdef ENABLE_BLE 6870 case BD_ADDR_TYPE_LE_PUBLIC: 6871 case BD_ADDR_TYPE_LE_RANDOM: 6872 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6873 return hci_connection->sm_connection.sm_connection_authenticated != 0; 6874 #endif 6875 #ifdef ENABLE_CLASSIC 6876 case BD_ADDR_TYPE_SCO: 6877 case BD_ADDR_TYPE_ACL: 6878 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6879 #endif 6880 default: 6881 return false; 6882 } 6883 } 6884 6885 bool gap_secure_connection(hci_con_handle_t con_handle){ 6886 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6887 if (hci_connection == NULL) return 0; 6888 6889 switch (hci_connection->address_type){ 6890 #ifdef ENABLE_BLE 6891 case BD_ADDR_TYPE_LE_PUBLIC: 6892 case BD_ADDR_TYPE_LE_RANDOM: 6893 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 6894 return hci_connection->sm_connection.sm_connection_sc != 0; 6895 #endif 6896 #ifdef ENABLE_CLASSIC 6897 case BD_ADDR_TYPE_SCO: 6898 case BD_ADDR_TYPE_ACL: 6899 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6900 #endif 6901 default: 6902 return false; 6903 } 6904 } 6905 6906 bool gap_bonded(hci_con_handle_t con_handle){ 6907 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6908 if (hci_connection == NULL) return 0; 6909 6910 #ifdef ENABLE_CLASSIC 6911 link_key_t link_key; 6912 link_key_type_t link_key_type; 6913 #endif 6914 switch (hci_connection->address_type){ 6915 #ifdef ENABLE_BLE 6916 case BD_ADDR_TYPE_LE_PUBLIC: 6917 case BD_ADDR_TYPE_LE_RANDOM: 6918 return hci_connection->sm_connection.sm_le_db_index >= 0; 6919 #endif 6920 #ifdef ENABLE_CLASSIC 6921 case BD_ADDR_TYPE_SCO: 6922 case BD_ADDR_TYPE_ACL: 6923 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6924 #endif 6925 default: 6926 return false; 6927 } 6928 } 6929 6930 #ifdef ENABLE_BLE 6931 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6932 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6933 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6934 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6935 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6936 return sm_conn->sm_connection_authorization_state; 6937 } 6938 #endif 6939 6940 #ifdef ENABLE_CLASSIC 6941 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){ 6942 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6943 if (!conn) return GAP_CONNECTION_INVALID; 6944 conn->sniff_min_interval = sniff_min_interval; 6945 conn->sniff_max_interval = sniff_max_interval; 6946 conn->sniff_attempt = sniff_attempt; 6947 conn->sniff_timeout = sniff_timeout; 6948 hci_run(); 6949 return 0; 6950 } 6951 6952 /** 6953 * @brief Exit Sniff mode 6954 * @param con_handle 6955 @ @return 0 if ok 6956 */ 6957 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6958 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6959 if (!conn) return GAP_CONNECTION_INVALID; 6960 conn->sniff_min_interval = 0xffff; 6961 hci_run(); 6962 return 0; 6963 } 6964 6965 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){ 6966 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6967 if (!conn) return GAP_CONNECTION_INVALID; 6968 conn->sniff_subrating_max_latency = max_latency; 6969 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6970 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6971 hci_run(); 6972 return ERROR_CODE_SUCCESS; 6973 } 6974 6975 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){ 6976 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6977 if (!conn) return GAP_CONNECTION_INVALID; 6978 conn->qos_service_type = service_type; 6979 conn->qos_token_rate = token_rate; 6980 conn->qos_peak_bandwidth = peak_bandwidth; 6981 conn->qos_latency = latency; 6982 conn->qos_delay_variation = delay_variation; 6983 hci_run(); 6984 return ERROR_CODE_SUCCESS; 6985 } 6986 6987 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6988 hci_stack->new_page_scan_interval = page_scan_interval; 6989 hci_stack->new_page_scan_window = page_scan_window; 6990 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6991 hci_run(); 6992 } 6993 6994 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6995 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6996 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6997 hci_run(); 6998 } 6999 7000 void gap_set_page_timeout(uint16_t page_timeout){ 7001 hci_stack->page_timeout = page_timeout; 7002 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7003 hci_run(); 7004 } 7005 7006 #endif 7007 7008 void hci_halting_defer(void){ 7009 if (hci_stack->state != HCI_STATE_HALTING) return; 7010 switch (hci_stack->substate){ 7011 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 7012 case HCI_HALTING_CLOSE: 7013 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 7014 break; 7015 default: 7016 break; 7017 } 7018 } 7019 7020 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7021 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7022 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7023 if (le_device_db_index >= le_device_db_max_count()) return; 7024 uint8_t offset = le_device_db_index >> 3; 7025 uint8_t mask = 1 << (le_device_db_index & 7); 7026 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7027 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7028 // note: go back to remove entries, otherwise, a remove + add will skip the add 7029 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7030 } 7031 } 7032 7033 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7034 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7035 if (le_device_db_index >= le_device_db_max_count()) return; 7036 uint8_t offset = le_device_db_index >> 3; 7037 uint8_t mask = 1 << (le_device_db_index & 7); 7038 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7039 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7040 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7041 } 7042 } 7043 7044 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7045 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7046 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7047 } 7048 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7049 // restart le resolving list update 7050 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7051 } 7052 return ERROR_CODE_SUCCESS; 7053 } 7054 #endif 7055 7056 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7057 void hci_setup_test_connections_fuzz(void){ 7058 hci_connection_t * conn; 7059 7060 // default address: 66:55:44:33:00:01 7061 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7062 7063 // setup Controller info 7064 hci_stack->num_cmd_packets = 255; 7065 hci_stack->acl_packets_total_num = 255; 7066 7067 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7068 addr[5] = 0x01; 7069 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7070 conn->con_handle = addr[5]; 7071 conn->role = HCI_ROLE_SLAVE; 7072 conn->state = RECEIVED_CONNECTION_REQUEST; 7073 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7074 7075 // setup incoming Classic SCO connection with con handle 0x0002 7076 addr[5] = 0x02; 7077 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7078 conn->con_handle = addr[5]; 7079 conn->role = HCI_ROLE_SLAVE; 7080 conn->state = RECEIVED_CONNECTION_REQUEST; 7081 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7082 7083 // setup ready Classic ACL connection with con handle 0x0003 7084 addr[5] = 0x03; 7085 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7086 conn->con_handle = addr[5]; 7087 conn->role = HCI_ROLE_SLAVE; 7088 conn->state = OPEN; 7089 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7090 7091 // setup ready Classic SCO connection with con handle 0x0004 7092 addr[5] = 0x04; 7093 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7094 conn->con_handle = addr[5]; 7095 conn->role = HCI_ROLE_SLAVE; 7096 conn->state = OPEN; 7097 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7098 7099 // setup ready LE ACL connection with con handle 0x005 and public address 7100 addr[5] = 0x05; 7101 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7102 conn->con_handle = addr[5]; 7103 conn->role = HCI_ROLE_SLAVE; 7104 conn->state = OPEN; 7105 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7106 conn->sm_connection.sm_connection_encrypted = 1; 7107 } 7108 7109 void hci_free_connections_fuzz(void){ 7110 btstack_linked_list_iterator_t it; 7111 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7112 while (btstack_linked_list_iterator_has_next(&it)){ 7113 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7114 btstack_linked_list_iterator_remove(&it); 7115 btstack_memory_hci_connection_free(con); 7116 } 7117 } 7118 void hci_simulate_working_fuzz(void){ 7119 hci_stack->le_scanning_param_update = false; 7120 hci_init_done(); 7121 hci_stack->num_cmd_packets = 255; 7122 } 7123 #endif 7124