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 // currently stored in 32-bit variable 143 #define SUPPORTED_HCI_COMMANDS \ 144 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 145 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 146 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 147 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 148 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 149 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 151 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 152 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 153 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 154 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 156 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 157 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 158 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 159 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 160 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 161 162 // enumerate supported commands 163 #define X(name, offset, bit) name, 164 enum { 165 SUPPORTED_HCI_COMMANDS 166 SUPPORTED_HCI_COMMANDS_COUNT 167 }; 168 #undef X 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 void hci_le_scan_stop(void); 214 static bool hci_run_general_gap_le(void); 215 #endif 216 #ifdef ENABLE_LE_PERIPHERAL 217 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 218 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 219 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 220 #endif /* ENABLE_LE_PERIPHERAL */ 221 #endif /* ENABLE_BLE */ 222 223 // the STACK is here 224 #ifndef HAVE_MALLOC 225 static hci_stack_t hci_stack_static; 226 #endif 227 static hci_stack_t * hci_stack = NULL; 228 229 #ifdef ENABLE_CLASSIC 230 // default name 231 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 232 233 // test helper 234 static uint8_t disable_l2cap_timeouts = 0; 235 #endif 236 237 // reset connection state on create and on reconnect 238 // don't overwrite addr, con handle, role 239 static void hci_connection_init(hci_connection_t * conn){ 240 conn->authentication_flags = AUTH_FLAG_NONE; 241 conn->bonding_flags = 0; 242 conn->requested_security_level = LEVEL_0; 243 #ifdef ENABLE_CLASSIC 244 conn->request_role = HCI_ROLE_INVALID; 245 conn->sniff_subrating_max_latency = 0xffff; 246 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 247 conn->link_key_type = INVALID_LINK_KEY; 248 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 249 btstack_run_loop_set_timer_context(&conn->timeout, conn); 250 hci_connection_timestamp(conn); 251 #endif 252 conn->acl_recombination_length = 0; 253 conn->acl_recombination_pos = 0; 254 conn->num_packets_sent = 0; 255 256 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 257 #ifdef ENABLE_BLE 258 conn->le_phy_update_all_phys = 0xff; 259 #endif 260 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 261 conn->le_max_tx_octets = 27; 262 #endif 263 #ifdef ENABLE_CLASSIC_PAIRING_OOB 264 conn->classic_oob_c_192 = NULL; 265 conn->classic_oob_r_192 = NULL; 266 conn->classic_oob_c_256 = NULL; 267 conn->classic_oob_r_256 = NULL; 268 #endif 269 } 270 271 /** 272 * create connection for given address 273 * 274 * @return connection OR NULL, if no memory left 275 */ 276 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 277 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 278 279 hci_connection_t * conn = btstack_memory_hci_connection_get(); 280 if (!conn) return NULL; 281 hci_connection_init(conn); 282 283 bd_addr_copy(conn->address, addr); 284 conn->address_type = addr_type; 285 conn->con_handle = HCI_CON_HANDLE_INVALID; 286 conn->role = HCI_ROLE_INVALID; 287 288 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 289 290 return conn; 291 } 292 293 294 /** 295 * get le connection parameter range 296 * 297 * @return le connection parameter range struct 298 */ 299 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 300 *range = hci_stack->le_connection_parameter_range; 301 } 302 303 /** 304 * set le connection parameter range 305 * 306 */ 307 308 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 309 hci_stack->le_connection_parameter_range = *range; 310 } 311 312 /** 313 * @brief Test if connection parameters are inside in existing rage 314 * @param conn_interval_min (unit: 1.25ms) 315 * @param conn_interval_max (unit: 1.25ms) 316 * @param conn_latency 317 * @param supervision_timeout (unit: 10ms) 318 * @return 1 if included 319 */ 320 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){ 321 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 322 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 323 324 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 325 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 326 327 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 328 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 329 330 return 1; 331 } 332 333 /** 334 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 335 * @note: default: 1 336 * @param max_peripheral_connections 337 */ 338 #ifdef ENABLE_LE_PERIPHERAL 339 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 340 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 341 } 342 #endif 343 344 /** 345 * get hci connections iterator 346 * 347 * @return hci connections iterator 348 */ 349 350 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 351 btstack_linked_list_iterator_init(it, &hci_stack->connections); 352 } 353 354 /** 355 * get connection for a given handle 356 * 357 * @return connection OR NULL, if not found 358 */ 359 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 360 btstack_linked_list_iterator_t it; 361 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 362 while (btstack_linked_list_iterator_has_next(&it)){ 363 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 364 if ( item->con_handle == con_handle ) { 365 return item; 366 } 367 } 368 return NULL; 369 } 370 371 /** 372 * get connection for given address 373 * 374 * @return connection OR NULL, if not found 375 */ 376 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 377 btstack_linked_list_iterator_t it; 378 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 379 while (btstack_linked_list_iterator_has_next(&it)){ 380 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 381 if (connection->address_type != addr_type) continue; 382 if (memcmp(addr, connection->address, 6) != 0) continue; 383 return connection; 384 } 385 return NULL; 386 } 387 388 #ifdef ENABLE_CLASSIC 389 390 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 391 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 392 } 393 394 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 395 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 396 } 397 398 #ifdef ENABLE_SCO_OVER_HCI 399 static int hci_number_sco_connections(void){ 400 int connections = 0; 401 btstack_linked_list_iterator_t it; 402 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 403 while (btstack_linked_list_iterator_has_next(&it)){ 404 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 405 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 406 connections++; 407 } 408 return connections; 409 } 410 #endif 411 412 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 413 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 414 #ifdef HAVE_EMBEDDED_TICK 415 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 416 // connections might be timed out 417 hci_emit_l2cap_check_timeout(connection); 418 } 419 #else 420 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 421 // connections might be timed out 422 hci_emit_l2cap_check_timeout(connection); 423 } 424 #endif 425 } 426 427 static void hci_connection_timestamp(hci_connection_t *connection){ 428 #ifdef HAVE_EMBEDDED_TICK 429 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 430 #else 431 connection->timestamp = btstack_run_loop_get_time_ms(); 432 #endif 433 } 434 435 /** 436 * add authentication flags and reset timer 437 * @note: assumes classic connection 438 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 439 */ 440 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 441 bd_addr_t addr; 442 reverse_bd_addr(bd_addr, addr); 443 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 444 if (conn) { 445 connectionSetAuthenticationFlags(conn, flags); 446 hci_connection_timestamp(conn); 447 } 448 } 449 450 static bool hci_pairing_active(hci_connection_t * hci_connection){ 451 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 452 } 453 454 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 455 if (hci_pairing_active(hci_connection)) return; 456 if (ssp){ 457 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 458 } else { 459 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 460 } 461 // if we are initiator, we have sent an HCI Authenticate Request 462 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 463 464 // if we are responder, use minimal service security level as required level 465 if (!initiator){ 466 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); 467 } 468 469 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 470 471 uint8_t event[12]; 472 event[0] = GAP_EVENT_PAIRING_STARTED; 473 event[1] = 10; 474 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 475 reverse_bd_addr(hci_connection->address, &event[4]); 476 event[10] = (uint8_t) ssp; 477 event[11] = (uint8_t) initiator; 478 hci_emit_event(event, sizeof(event), 1); 479 } 480 481 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 482 hci_connection->requested_security_level = LEVEL_0; 483 if (!hci_pairing_active(hci_connection)) return; 484 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 485 #ifdef ENABLE_CLASSIC_PAIRING_OOB 486 hci_connection->classic_oob_c_192 = NULL; 487 hci_connection->classic_oob_r_192 = NULL; 488 hci_connection->classic_oob_c_256 = NULL; 489 hci_connection->classic_oob_r_256 = NULL; 490 #endif 491 log_info("pairing complete, status %02x", status); 492 493 uint8_t event[11]; 494 event[0] = GAP_EVENT_PAIRING_COMPLETE; 495 event[1] = 9; 496 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 497 reverse_bd_addr(hci_connection->address, &event[4]); 498 event[10] = status; 499 hci_emit_event(event, sizeof(event), 1); 500 } 501 502 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 503 hci_connection_t * conn = hci_connection_for_handle(handle); 504 if (!conn) return false; 505 return hci_pairing_active(conn); 506 } 507 508 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 509 if (!hci_stack->link_key_db) return; 510 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 511 hci_stack->link_key_db->delete_link_key(addr); 512 } 513 514 void gap_store_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; 516 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 517 hci_stack->link_key_db->put_link_key(addr, link_key, type); 518 } 519 520 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 521 if (!hci_stack->link_key_db) return false; 522 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 523 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 524 return result; 525 } 526 527 void gap_delete_all_link_keys(void){ 528 bd_addr_t addr; 529 link_key_t link_key; 530 link_key_type_t type; 531 btstack_link_key_iterator_t it; 532 int ok = gap_link_key_iterator_init(&it); 533 if (!ok) { 534 log_error("could not initialize iterator"); 535 return; 536 } 537 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 538 gap_drop_link_key_for_bd_addr(addr); 539 } 540 gap_link_key_iterator_done(&it); 541 } 542 543 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 544 if (!hci_stack->link_key_db) return 0; 545 if (!hci_stack->link_key_db->iterator_init) return 0; 546 return hci_stack->link_key_db->iterator_init(it); 547 } 548 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){ 549 if (!hci_stack->link_key_db) return 0; 550 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 551 } 552 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 553 if (!hci_stack->link_key_db) return; 554 hci_stack->link_key_db->iterator_done(it); 555 } 556 #endif 557 558 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 559 switch (address_type){ 560 case BD_ADDR_TYPE_LE_PUBLIC: 561 case BD_ADDR_TYPE_LE_RANDOM: 562 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 563 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 564 return true; 565 default: 566 return false; 567 } 568 } 569 570 static int hci_is_le_connection(hci_connection_t * connection){ 571 return hci_is_le_connection_type(connection->address_type); 572 } 573 574 /** 575 * count connections 576 */ 577 static int nr_hci_connections(void){ 578 int count = 0; 579 btstack_linked_item_t *it; 580 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 581 count++; 582 } 583 return count; 584 } 585 586 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 587 588 unsigned int num_packets_sent_classic = 0; 589 unsigned int num_packets_sent_le = 0; 590 591 btstack_linked_item_t *it; 592 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 593 hci_connection_t * connection = (hci_connection_t *) it; 594 if (hci_is_le_connection(connection)){ 595 num_packets_sent_le += connection->num_packets_sent; 596 } 597 if (connection->address_type == BD_ADDR_TYPE_ACL){ 598 num_packets_sent_classic += connection->num_packets_sent; 599 } 600 } 601 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 602 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 603 int free_slots_le = 0; 604 605 if (free_slots_classic < 0){ 606 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); 607 return 0; 608 } 609 610 if (hci_stack->le_acl_packets_total_num){ 611 // if we have LE slots, they are used 612 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 613 if (free_slots_le < 0){ 614 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); 615 return 0; 616 } 617 } else { 618 // otherwise, classic slots are used for LE, too 619 free_slots_classic -= num_packets_sent_le; 620 if (free_slots_classic < 0){ 621 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); 622 return 0; 623 } 624 } 625 626 switch (address_type){ 627 case BD_ADDR_TYPE_UNKNOWN: 628 log_error("hci_number_free_acl_slots: unknown address type"); 629 return 0; 630 631 case BD_ADDR_TYPE_ACL: 632 return (uint16_t) free_slots_classic; 633 634 default: 635 if (hci_stack->le_acl_packets_total_num > 0){ 636 return (uint16_t) free_slots_le; 637 } 638 return (uint16_t) free_slots_classic; 639 } 640 } 641 642 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 643 // get connection type 644 hci_connection_t * connection = hci_connection_for_handle(con_handle); 645 if (!connection){ 646 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 647 return 0; 648 } 649 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 650 } 651 652 #ifdef ENABLE_CLASSIC 653 static int hci_number_free_sco_slots(void){ 654 unsigned int num_sco_packets_sent = 0; 655 btstack_linked_item_t *it; 656 if (hci_stack->synchronous_flow_control_enabled){ 657 // explicit flow control 658 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 659 hci_connection_t * connection = (hci_connection_t *) it; 660 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 661 num_sco_packets_sent += connection->num_packets_sent; 662 } 663 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 664 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 665 return 0; 666 } 667 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 668 } else { 669 // implicit flow control -- TODO 670 int num_ready = 0; 671 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 672 hci_connection_t * connection = (hci_connection_t *) it; 673 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 674 if (connection->sco_tx_ready == 0) continue; 675 num_ready++; 676 } 677 return num_ready; 678 } 679 } 680 #endif 681 682 // only used to send HCI Host Number Completed Packets 683 static int hci_can_send_comand_packet_transport(void){ 684 if (hci_stack->hci_packet_buffer_reserved) return 0; 685 686 // check for async hci transport implementations 687 if (hci_stack->hci_transport->can_send_packet_now){ 688 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 689 return 0; 690 } 691 } 692 return 1; 693 } 694 695 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 696 bool hci_can_send_command_packet_now(void){ 697 if (hci_can_send_comand_packet_transport() == 0) return false; 698 return hci_stack->num_cmd_packets > 0u; 699 } 700 701 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 702 // check for async hci transport implementations 703 if (!hci_stack->hci_transport->can_send_packet_now) return true; 704 return hci_stack->hci_transport->can_send_packet_now(packet_type); 705 } 706 707 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 708 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 709 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 710 } 711 712 bool hci_can_send_acl_le_packet_now(void){ 713 if (hci_stack->hci_packet_buffer_reserved) return false; 714 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 715 } 716 717 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 718 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 719 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 720 } 721 722 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 723 if (hci_stack->hci_packet_buffer_reserved) return false; 724 return hci_can_send_prepared_acl_packet_now(con_handle); 725 } 726 727 #ifdef ENABLE_CLASSIC 728 bool hci_can_send_acl_classic_packet_now(void){ 729 if (hci_stack->hci_packet_buffer_reserved) return false; 730 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 731 } 732 733 bool hci_can_send_prepared_sco_packet_now(void){ 734 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 735 if (hci_have_usb_transport()){ 736 return hci_stack->sco_can_send_now; 737 } else { 738 return hci_number_free_sco_slots() > 0; 739 } 740 } 741 742 bool hci_can_send_sco_packet_now(void){ 743 if (hci_stack->hci_packet_buffer_reserved) return false; 744 return hci_can_send_prepared_sco_packet_now(); 745 } 746 747 void hci_request_sco_can_send_now_event(void){ 748 hci_stack->sco_waiting_for_can_send_now = 1; 749 hci_notify_if_sco_can_send_now(); 750 } 751 #endif 752 753 // used for internal checks in l2cap.c 754 bool hci_is_packet_buffer_reserved(void){ 755 return hci_stack->hci_packet_buffer_reserved; 756 } 757 758 // reserves outgoing packet buffer. 759 // @return 1 if successful 760 bool hci_reserve_packet_buffer(void){ 761 if (hci_stack->hci_packet_buffer_reserved) { 762 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 763 return false; 764 } 765 hci_stack->hci_packet_buffer_reserved = true; 766 return true; 767 } 768 769 void hci_release_packet_buffer(void){ 770 hci_stack->hci_packet_buffer_reserved = false; 771 } 772 773 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 774 static int hci_transport_synchronous(void){ 775 return hci_stack->hci_transport->can_send_packet_now == NULL; 776 } 777 778 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 779 780 // 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); 781 782 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 783 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 784 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 785 max_acl_data_packet_length = hci_stack->le_data_packets_length; 786 } 787 788 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 789 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 790 max_acl_data_packet_length = connection->le_max_tx_octets; 791 } 792 #endif 793 794 log_debug("hci_send_acl_packet_fragments entered"); 795 796 uint8_t status = ERROR_CODE_SUCCESS; 797 // multiple packets could be send on a synchronous HCI transport 798 while (true){ 799 800 log_debug("hci_send_acl_packet_fragments loop entered"); 801 802 // get current data 803 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 804 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 805 bool more_fragments = false; 806 807 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 808 if (current_acl_data_packet_length > max_acl_data_packet_length){ 809 more_fragments = true; 810 current_acl_data_packet_length = max_acl_data_packet_length; 811 } 812 813 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 814 if (acl_header_pos > 0u){ 815 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 816 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 817 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 818 } 819 820 // update header len 821 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 822 823 // count packet 824 connection->num_packets_sent++; 825 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 826 827 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 828 if (more_fragments){ 829 // update start of next fragment to send 830 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 831 } else { 832 // done 833 hci_stack->acl_fragmentation_pos = 0; 834 hci_stack->acl_fragmentation_total_size = 0; 835 } 836 837 // send packet 838 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 839 const int size = current_acl_data_packet_length + 4; 840 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 841 hci_stack->acl_fragmentation_tx_active = 1; 842 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 843 if (err != 0){ 844 // no error from HCI Transport expected 845 status = ERROR_CODE_HARDWARE_FAILURE; 846 } 847 848 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 849 850 // done yet? 851 if (!more_fragments) break; 852 853 // can send more? 854 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 855 } 856 857 log_debug("hci_send_acl_packet_fragments loop over"); 858 859 // release buffer now for synchronous transport 860 if (hci_transport_synchronous()){ 861 hci_stack->acl_fragmentation_tx_active = 0; 862 hci_release_packet_buffer(); 863 hci_emit_transport_packet_sent(); 864 } 865 866 return status; 867 } 868 869 // pre: caller has reserved the packet buffer 870 uint8_t hci_send_acl_packet_buffer(int size){ 871 btstack_assert(hci_stack->hci_packet_buffer_reserved); 872 873 uint8_t * packet = hci_stack->hci_packet_buffer; 874 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 875 876 // check for free places on Bluetooth module 877 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 878 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 879 hci_release_packet_buffer(); 880 hci_emit_transport_packet_sent(); 881 return BTSTACK_ACL_BUFFERS_FULL; 882 } 883 884 hci_connection_t *connection = hci_connection_for_handle( con_handle); 885 if (!connection) { 886 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 887 hci_release_packet_buffer(); 888 hci_emit_transport_packet_sent(); 889 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 890 } 891 892 #ifdef ENABLE_CLASSIC 893 hci_connection_timestamp(connection); 894 #endif 895 896 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 897 898 // setup data 899 hci_stack->acl_fragmentation_total_size = size; 900 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 901 902 return hci_send_acl_packet_fragments(connection); 903 } 904 905 #ifdef ENABLE_CLASSIC 906 // pre: caller has reserved the packet buffer 907 uint8_t hci_send_sco_packet_buffer(int size){ 908 btstack_assert(hci_stack->hci_packet_buffer_reserved); 909 910 uint8_t * packet = hci_stack->hci_packet_buffer; 911 912 // skip checks in loopback mode 913 if (!hci_stack->loopback_mode){ 914 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 915 916 // check for free places on Bluetooth module 917 if (!hci_can_send_prepared_sco_packet_now()) { 918 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 919 hci_release_packet_buffer(); 920 hci_emit_transport_packet_sent(); 921 return BTSTACK_ACL_BUFFERS_FULL; 922 } 923 924 // track send packet in connection struct 925 hci_connection_t *connection = hci_connection_for_handle( con_handle); 926 if (!connection) { 927 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 928 hci_release_packet_buffer(); 929 hci_emit_transport_packet_sent(); 930 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 931 } 932 933 if (hci_have_usb_transport()){ 934 // token used 935 hci_stack->sco_can_send_now = false; 936 } else { 937 if (hci_stack->synchronous_flow_control_enabled){ 938 connection->num_packets_sent++; 939 } else { 940 connection->sco_tx_ready--; 941 } 942 } 943 } 944 945 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 946 947 #ifdef HAVE_SCO_TRANSPORT 948 hci_stack->sco_transport->send_packet(packet, size); 949 hci_release_packet_buffer(); 950 hci_emit_transport_packet_sent(); 951 952 return 0; 953 #else 954 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 955 if (hci_transport_synchronous()){ 956 hci_release_packet_buffer(); 957 hci_emit_transport_packet_sent(); 958 } 959 960 if (err != 0){ 961 return ERROR_CODE_HARDWARE_FAILURE; 962 } 963 return ERROR_CODE_SUCCESS; 964 #endif 965 } 966 #endif 967 968 static void acl_handler(uint8_t *packet, uint16_t size){ 969 970 // get info 971 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 972 hci_connection_t *conn = hci_connection_for_handle(con_handle); 973 uint8_t acl_flags = READ_ACL_FLAGS(packet); 974 uint16_t acl_length = READ_ACL_LENGTH(packet); 975 976 // ignore non-registered handle 977 if (!conn){ 978 log_error("acl_handler called with non-registered handle %u!" , con_handle); 979 return; 980 } 981 982 // assert packet is complete 983 if ((acl_length + 4u) != size){ 984 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 985 return; 986 } 987 988 #ifdef ENABLE_CLASSIC 989 // update idle timestamp 990 hci_connection_timestamp(conn); 991 #endif 992 993 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 994 hci_stack->host_completed_packets = 1; 995 conn->num_packets_completed++; 996 #endif 997 998 // handle different packet types 999 switch (acl_flags & 0x03u) { 1000 1001 case 0x01: // continuation fragment 1002 1003 // sanity checks 1004 if (conn->acl_recombination_pos == 0u) { 1005 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1006 return; 1007 } 1008 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1009 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1010 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1011 conn->acl_recombination_pos = 0; 1012 return; 1013 } 1014 1015 // append fragment payload (header already stored) 1016 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1017 &packet[4], acl_length); 1018 conn->acl_recombination_pos += acl_length; 1019 1020 // forward complete L2CAP packet if complete. 1021 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1022 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1023 // reset recombination buffer 1024 conn->acl_recombination_length = 0; 1025 conn->acl_recombination_pos = 0; 1026 } 1027 break; 1028 1029 case 0x02: { // first fragment 1030 1031 // sanity check 1032 if (conn->acl_recombination_pos) { 1033 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1034 conn->acl_recombination_pos = 0; 1035 } 1036 1037 // peek into L2CAP packet! 1038 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1039 1040 // compare fragment size to L2CAP packet size 1041 if (acl_length >= (l2cap_length + 4u)){ 1042 // forward fragment as L2CAP packet 1043 hci_emit_acl_packet(packet, acl_length + 4u); 1044 } else { 1045 1046 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1047 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1048 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1049 return; 1050 } 1051 1052 // store first fragment and tweak acl length for complete package 1053 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1054 packet, acl_length + 4u); 1055 conn->acl_recombination_pos = acl_length + 4u; 1056 conn->acl_recombination_length = l2cap_length; 1057 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1058 } 1059 break; 1060 1061 } 1062 default: 1063 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1064 return; 1065 } 1066 1067 // execute main loop 1068 hci_run(); 1069 } 1070 1071 static void hci_connection_stop_timer(hci_connection_t * conn){ 1072 btstack_run_loop_remove_timer(&conn->timeout); 1073 #ifdef ENABLE_CLASSIC 1074 btstack_run_loop_remove_timer(&conn->timeout_sco); 1075 #endif 1076 } 1077 1078 static void hci_shutdown_connection(hci_connection_t *conn){ 1079 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1080 1081 #ifdef ENABLE_CLASSIC 1082 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1083 bd_addr_type_t addr_type = conn->address_type; 1084 #endif 1085 #ifdef HAVE_SCO_TRANSPORT 1086 hci_con_handle_t con_handle = conn->con_handle; 1087 #endif 1088 #endif 1089 1090 hci_connection_stop_timer(conn); 1091 1092 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1093 btstack_memory_hci_connection_free( conn ); 1094 1095 // now it's gone 1096 hci_emit_nr_connections_changed(); 1097 1098 #ifdef ENABLE_CLASSIC 1099 #ifdef ENABLE_SCO_OVER_HCI 1100 // update SCO 1101 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1102 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1103 } 1104 #endif 1105 #ifdef HAVE_SCO_TRANSPORT 1106 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1107 hci_stack->sco_transport->close(con_handle); 1108 } 1109 #endif 1110 #endif 1111 } 1112 1113 #ifdef ENABLE_CLASSIC 1114 1115 static const uint16_t packet_type_sizes[] = { 1116 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1117 HCI_ACL_DH1_SIZE, 0, 0, 0, 1118 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1119 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1120 }; 1121 static const uint8_t packet_type_feature_requirement_bit[] = { 1122 0, // 3 slot packets 1123 1, // 5 slot packets 1124 25, // EDR 2 mpbs 1125 26, // EDR 3 mbps 1126 39, // 3 slot EDR packts 1127 40, // 5 slot EDR packet 1128 }; 1129 static const uint16_t packet_type_feature_packet_mask[] = { 1130 0x0f00, // 3 slot packets 1131 0xf000, // 5 slot packets 1132 0x1102, // EDR 2 mpbs 1133 0x2204, // EDR 3 mbps 1134 0x0300, // 3 slot EDR packts 1135 0x3000, // 5 slot EDR packet 1136 }; 1137 1138 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1139 // enable packet types based on size 1140 uint16_t packet_types = 0; 1141 unsigned int i; 1142 for (i=0;i<16;i++){ 1143 if (packet_type_sizes[i] == 0) continue; 1144 if (packet_type_sizes[i] <= buffer_size){ 1145 packet_types |= 1 << i; 1146 } 1147 } 1148 // disable packet types due to missing local supported features 1149 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1150 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1151 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1152 if (feature_set) continue; 1153 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1154 packet_types &= ~packet_type_feature_packet_mask[i]; 1155 } 1156 // flip bits for "may not be used" 1157 packet_types ^= 0x3306; 1158 return packet_types; 1159 } 1160 1161 uint16_t hci_usable_acl_packet_types(void){ 1162 return hci_stack->packet_types; 1163 } 1164 #endif 1165 1166 uint8_t* hci_get_outgoing_packet_buffer(void){ 1167 // hci packet buffer is >= acl data packet length 1168 return hci_stack->hci_packet_buffer; 1169 } 1170 1171 uint16_t hci_max_acl_data_packet_length(void){ 1172 return hci_stack->acl_data_packet_length; 1173 } 1174 1175 #ifdef ENABLE_CLASSIC 1176 bool hci_extended_sco_link_supported(void){ 1177 // No. 31, byte 3, bit 7 1178 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1179 } 1180 #endif 1181 1182 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1183 // No. 54, byte 6, bit 6 1184 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1185 } 1186 1187 #ifdef ENABLE_CLASSIC 1188 static int gap_ssp_supported(void){ 1189 // No. 51, byte 6, bit 3 1190 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1191 } 1192 #endif 1193 1194 static int hci_classic_supported(void){ 1195 #ifdef ENABLE_CLASSIC 1196 // No. 37, byte 4, bit 5, = No BR/EDR Support 1197 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1198 #else 1199 return 0; 1200 #endif 1201 } 1202 1203 static int hci_le_supported(void){ 1204 #ifdef ENABLE_BLE 1205 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1206 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1207 #else 1208 return 0; 1209 #endif 1210 } 1211 1212 static bool hci_command_supported(uint8_t command_index){ 1213 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1214 } 1215 1216 #ifdef ENABLE_BLE 1217 1218 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1219 static bool hci_extended_advertising_supported(void){ 1220 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1221 } 1222 #endif 1223 1224 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1225 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1226 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1227 } else { 1228 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1229 } 1230 } 1231 1232 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1233 *addr_type = hci_stack->le_own_addr_type; 1234 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1235 } 1236 1237 #ifdef ENABLE_LE_PERIPHERAL 1238 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1239 *addr_type = hci_stack->le_advertisements_own_addr_type; 1240 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1241 }; 1242 #endif 1243 1244 #ifdef ENABLE_LE_CENTRAL 1245 1246 /** 1247 * @brief Get own addr type and address used for LE connections (Central) 1248 */ 1249 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1250 *addr_type = hci_stack->le_connection_own_addr_type; 1251 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1252 } 1253 1254 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1255 1256 uint16_t offset = 3; 1257 uint8_t num_reports = packet[offset]; 1258 offset += 1; 1259 1260 uint16_t i; 1261 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1262 for (i=0; (i<num_reports) && (offset < size);i++){ 1263 // sanity checks on data_length: 1264 uint8_t data_length = packet[offset + 8]; 1265 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1266 if ((offset + 9u + data_length + 1u) > size) return; 1267 // setup event 1268 uint8_t event_size = 10u + data_length; 1269 uint16_t pos = 0; 1270 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1271 event[pos++] = event_size; 1272 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1273 offset += 8; 1274 pos += 8; 1275 event[pos++] = packet[offset + 1 + data_length]; // rssi 1276 event[pos++] = data_length; 1277 offset++; 1278 (void)memcpy(&event[pos], &packet[offset], data_length); 1279 pos += data_length; 1280 offset += data_length + 1u; // rssi 1281 hci_emit_event(event, pos, 1); 1282 } 1283 } 1284 1285 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1286 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1287 uint16_t offset = 3; 1288 uint8_t num_reports = packet[offset++]; 1289 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1290 uint8_t i; 1291 for (i=0; (i<num_reports) && (offset < size);i++){ 1292 // sanity checks on data_length: 1293 uint16_t data_length = packet[offset + 23]; 1294 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1295 if ((offset + 24u + data_length) > size) return; 1296 uint16_t event_type = little_endian_read_16(packet, offset); 1297 offset += 2; 1298 if ((event_type & 0x10) != 0) { 1299 // setup legacy event 1300 uint8_t legacy_event_type; 1301 switch (event_type){ 1302 case 0b0010011: 1303 // ADV_IND 1304 legacy_event_type = 0; 1305 break; 1306 case 0b0010101: 1307 // ADV_DIRECT_IND 1308 legacy_event_type = 1; 1309 break; 1310 case 0b0010010: 1311 // ADV_SCAN_IND 1312 legacy_event_type = 2; 1313 break; 1314 case 0b0010000: 1315 // ADV_NONCONN_IND 1316 legacy_event_type = 3; 1317 break; 1318 case 0b0011011: 1319 case 0b0011010: 1320 // SCAN_RSP 1321 legacy_event_type = 4; 1322 break; 1323 default: 1324 legacy_event_type = 0; 1325 break; 1326 } 1327 uint16_t pos = 0; 1328 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1329 event[pos++] = 10u + data_length; 1330 event[pos++] = legacy_event_type; 1331 // copy address type + address 1332 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1333 offset += 7; 1334 pos += 7; 1335 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1336 offset += 4; 1337 // copy rssi 1338 event[pos++] = packet[offset++]; 1339 // skip periodic advertising interval and direct address 1340 offset += 9; 1341 // copy data len + data; 1342 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1343 pos += 1 +data_length; 1344 offset += 1+ data_length; 1345 hci_emit_event(event, pos, 1); 1346 } else { 1347 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1348 uint8_t report_len = 24 + data_length; 1349 event[1] = report_len; 1350 little_endian_store_16(event, 2, event_type); 1351 memcpy(&event[4], &packet[offset], report_len); 1352 offset += report_len; 1353 hci_emit_event(event, 2 + report_len, 1); 1354 } 1355 } 1356 } 1357 #endif 1358 1359 #endif 1360 #endif 1361 1362 #ifdef ENABLE_BLE 1363 #ifdef ENABLE_LE_PERIPHERAL 1364 static void hci_update_advertisements_enabled_for_current_roles(void){ 1365 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1366 // get number of active le slave connections 1367 int num_slave_connections = 0; 1368 btstack_linked_list_iterator_t it; 1369 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1370 while (btstack_linked_list_iterator_has_next(&it)){ 1371 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1372 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1373 if (con->state != OPEN) continue; 1374 if (con->role != HCI_ROLE_SLAVE) continue; 1375 if (!hci_is_le_connection(con)) continue; 1376 num_slave_connections++; 1377 } 1378 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1379 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1380 } else { 1381 hci_stack->le_advertisements_enabled_for_current_roles = false; 1382 } 1383 } 1384 #endif 1385 #endif 1386 1387 #ifdef ENABLE_CLASSIC 1388 static void gap_run_set_local_name(void){ 1389 hci_reserve_packet_buffer(); 1390 uint8_t * packet = hci_stack->hci_packet_buffer; 1391 // construct HCI Command and send 1392 uint16_t opcode = hci_write_local_name.opcode; 1393 hci_stack->last_cmd_opcode = opcode; 1394 packet[0] = opcode & 0xff; 1395 packet[1] = opcode >> 8; 1396 packet[2] = DEVICE_NAME_LEN; 1397 memset(&packet[3], 0, DEVICE_NAME_LEN); 1398 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1399 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1400 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1401 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1402 // expand '00:00:00:00:00:00' in name with bd_addr 1403 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1404 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1405 } 1406 1407 static void gap_run_set_eir_data(void){ 1408 hci_reserve_packet_buffer(); 1409 uint8_t * packet = hci_stack->hci_packet_buffer; 1410 // construct HCI Command in-place and send 1411 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1412 hci_stack->last_cmd_opcode = opcode; 1413 uint16_t offset = 0; 1414 packet[offset++] = opcode & 0xff; 1415 packet[offset++] = opcode >> 8; 1416 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1417 packet[offset++] = 0; // FEC not required 1418 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1419 if (hci_stack->eir_data){ 1420 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1421 ad_context_t context; 1422 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1423 uint8_t data_type = ad_iterator_get_data_type(&context); 1424 uint8_t size = ad_iterator_get_data_len(&context); 1425 const uint8_t *data = ad_iterator_get_data(&context); 1426 // copy item 1427 packet[offset++] = size + 1; 1428 packet[offset++] = data_type; 1429 memcpy(&packet[offset], data, size); 1430 // update name item 1431 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1432 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1433 } 1434 offset += size; 1435 } 1436 } else { 1437 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1438 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1439 packet[offset++] = bytes_to_copy + 1; 1440 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1441 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1442 // expand '00:00:00:00:00:00' in name with bd_addr 1443 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1444 } 1445 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1446 } 1447 1448 static void hci_run_gap_tasks_classic(void){ 1449 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1450 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1451 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1452 return; 1453 } 1454 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1455 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1456 gap_run_set_local_name(); 1457 return; 1458 } 1459 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1460 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1461 gap_run_set_eir_data(); 1462 return; 1463 } 1464 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1465 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1466 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1467 return; 1468 } 1469 // write page scan activity 1470 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1471 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1472 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1473 return; 1474 } 1475 // write page scan type 1476 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1477 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1478 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1479 return; 1480 } 1481 // write page timeout 1482 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1483 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1484 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1485 return; 1486 } 1487 // send scan enable 1488 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1489 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1490 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1491 return; 1492 } 1493 // send write scan activity 1494 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1495 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1496 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1497 return; 1498 } 1499 } 1500 #endif 1501 1502 #ifndef HAVE_HOST_CONTROLLER_API 1503 1504 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1505 if (!hci_stack->config) return 0; 1506 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1507 // Limit baud rate for Broadcom chipsets to 3 mbps 1508 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1509 baud_rate = 3000000; 1510 } 1511 return baud_rate; 1512 } 1513 1514 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1515 UNUSED(ds); 1516 1517 switch (hci_stack->substate){ 1518 case HCI_INIT_W4_SEND_RESET: 1519 log_info("Resend HCI Reset"); 1520 hci_stack->substate = HCI_INIT_SEND_RESET; 1521 hci_stack->num_cmd_packets = 1; 1522 hci_run(); 1523 break; 1524 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1525 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1526 if (hci_stack->hci_transport->reset_link){ 1527 hci_stack->hci_transport->reset_link(); 1528 } 1529 1530 /* fall through */ 1531 1532 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1533 log_info("Resend HCI Reset - CSR Warm Boot"); 1534 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1535 hci_stack->num_cmd_packets = 1; 1536 hci_run(); 1537 break; 1538 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1539 if (hci_stack->hci_transport->set_baudrate){ 1540 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1541 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1542 hci_stack->hci_transport->set_baudrate(baud_rate); 1543 } 1544 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1545 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1546 if (hci_stack->hci_transport->reset_link){ 1547 log_info("Link Reset"); 1548 hci_stack->hci_transport->reset_link(); 1549 } 1550 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1551 hci_run(); 1552 } 1553 break; 1554 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1555 // otherwise continue 1556 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1557 hci_send_cmd(&hci_read_local_supported_commands); 1558 break; 1559 default: 1560 break; 1561 } 1562 } 1563 #endif 1564 1565 static void hci_initializing_next_state(void){ 1566 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1567 } 1568 1569 static void hci_init_done(void){ 1570 // done. tell the app 1571 log_info("hci_init_done -> HCI_STATE_WORKING"); 1572 hci_stack->state = HCI_STATE_WORKING; 1573 hci_emit_state(); 1574 } 1575 1576 // assumption: hci_can_send_command_packet_now() == true 1577 static void hci_initializing_run(void){ 1578 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1579 1580 if (!hci_can_send_command_packet_now()) return; 1581 1582 #ifndef HAVE_HOST_CONTROLLER_API 1583 bool need_baud_change = hci_stack->config 1584 && hci_stack->chipset 1585 && hci_stack->chipset->set_baudrate_command 1586 && hci_stack->hci_transport->set_baudrate 1587 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1588 #endif 1589 1590 switch (hci_stack->substate){ 1591 case HCI_INIT_SEND_RESET: 1592 hci_state_reset(); 1593 1594 #ifndef HAVE_HOST_CONTROLLER_API 1595 // prepare reset if command complete not received in 100ms 1596 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1597 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1598 btstack_run_loop_add_timer(&hci_stack->timeout); 1599 #endif 1600 // send command 1601 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1602 hci_send_cmd(&hci_reset); 1603 break; 1604 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1605 hci_send_cmd(&hci_read_local_version_information); 1606 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1607 break; 1608 1609 #ifndef HAVE_HOST_CONTROLLER_API 1610 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1611 hci_state_reset(); 1612 // prepare reset if command complete not received in 100ms 1613 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1614 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1615 btstack_run_loop_add_timer(&hci_stack->timeout); 1616 // send command 1617 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1618 hci_send_cmd(&hci_reset); 1619 break; 1620 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1621 hci_state_reset(); 1622 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1623 hci_send_cmd(&hci_reset); 1624 break; 1625 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1626 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1627 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1628 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1629 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1630 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1631 break; 1632 } 1633 case HCI_INIT_SET_BD_ADDR: 1634 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1635 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1636 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1637 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1638 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1639 break; 1640 case HCI_INIT_SEND_READ_LOCAL_NAME: 1641 #ifdef ENABLE_CLASSIC 1642 hci_send_cmd(&hci_read_local_name); 1643 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1644 break; 1645 #endif 1646 /* fall through */ 1647 1648 case HCI_INIT_SEND_BAUD_CHANGE: 1649 if (need_baud_change) { 1650 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1651 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1652 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1653 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1654 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1655 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1656 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1657 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1658 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1659 btstack_run_loop_add_timer(&hci_stack->timeout); 1660 } 1661 break; 1662 } 1663 1664 /* fall through */ 1665 1666 case HCI_INIT_CUSTOM_INIT: 1667 // Custom initialization 1668 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1669 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1670 bool send_cmd = false; 1671 switch (hci_stack->chipset_result){ 1672 case BTSTACK_CHIPSET_VALID_COMMAND: 1673 send_cmd = true; 1674 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1675 break; 1676 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1677 send_cmd = true; 1678 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1679 log_info("CSR Warm Boot"); 1680 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1681 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1682 btstack_run_loop_add_timer(&hci_stack->timeout); 1683 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1684 && hci_stack->config 1685 && hci_stack->chipset 1686 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1687 && hci_stack->hci_transport->set_baudrate 1688 && hci_transport_uart_get_main_baud_rate()){ 1689 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1690 } else { 1691 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1692 } 1693 break; 1694 default: 1695 break; 1696 } 1697 1698 if (send_cmd){ 1699 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1700 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1701 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1702 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1703 break; 1704 } 1705 log_info("Init script done"); 1706 1707 // Init script download on Broadcom chipsets causes: 1708 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1709 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1710 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1711 1712 // - baud rate to reset, restore UART baud rate if needed 1713 if (need_baud_change) { 1714 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1715 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1716 hci_stack->hci_transport->set_baudrate(baud_rate); 1717 } 1718 1719 uint16_t bcm_delay_ms = 300; 1720 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1721 // -> Work around: wait here. 1722 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1723 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1724 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1725 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1726 btstack_run_loop_add_timer(&hci_stack->timeout); 1727 break; 1728 } 1729 } 1730 #endif 1731 /* fall through */ 1732 1733 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1734 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1735 hci_send_cmd(&hci_read_local_supported_commands); 1736 break; 1737 case HCI_INIT_READ_BD_ADDR: 1738 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1739 hci_send_cmd(&hci_read_bd_addr); 1740 break; 1741 case HCI_INIT_READ_BUFFER_SIZE: 1742 // only read buffer size if supported 1743 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1744 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1745 hci_send_cmd(&hci_read_buffer_size); 1746 break; 1747 } 1748 1749 /* fall through */ 1750 1751 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1752 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1753 hci_send_cmd(&hci_read_local_supported_features); 1754 break; 1755 1756 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1757 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1758 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1759 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1760 break; 1761 case HCI_INIT_HOST_BUFFER_SIZE: 1762 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1763 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1764 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1765 break; 1766 #endif 1767 1768 case HCI_INIT_SET_EVENT_MASK: 1769 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1770 if (hci_le_supported()){ 1771 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1772 } else { 1773 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1774 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1775 } 1776 break; 1777 1778 case HCI_INIT_SET_EVENT_MASK_2: 1779 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2)){ 1780 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1781 // Encryption Change Event v2 - bit 25 1782 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1783 break; 1784 } 1785 1786 #ifdef ENABLE_CLASSIC 1787 /* fall through */ 1788 1789 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1790 if (hci_classic_supported() && gap_ssp_supported()){ 1791 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1792 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1793 break; 1794 } 1795 1796 /* fall through */ 1797 1798 case HCI_INIT_WRITE_INQUIRY_MODE: 1799 if (hci_classic_supported()){ 1800 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1801 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1802 break; 1803 } 1804 1805 /* fall through */ 1806 1807 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1808 // skip write secure connections host support if not supported or disabled 1809 if (hci_classic_supported() && hci_stack->secure_connections_enable 1810 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1811 hci_stack->secure_connections_active = true; 1812 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1813 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1814 break; 1815 } 1816 1817 /* fall through */ 1818 1819 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1820 // skip set min encryption key size 1821 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1822 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1823 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1824 break; 1825 } 1826 1827 #ifdef ENABLE_SCO_OVER_HCI 1828 /* fall through */ 1829 1830 // only sent if ENABLE_SCO_OVER_HCI is defined 1831 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1832 // skip write synchronous flow control if not supported 1833 if (hci_classic_supported() 1834 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1835 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1836 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1837 break; 1838 } 1839 /* fall through */ 1840 1841 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1842 // skip write default erroneous data reporting if not supported 1843 if (hci_classic_supported() 1844 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1845 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1846 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1847 break; 1848 } 1849 #endif 1850 1851 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1852 /* fall through */ 1853 1854 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1855 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1856 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1857 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1858 #ifdef ENABLE_SCO_OVER_HCI 1859 log_info("BCM: Route SCO data via HCI transport"); 1860 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1861 #endif 1862 #ifdef ENABLE_SCO_OVER_PCM 1863 log_info("BCM: Route SCO data via PCM interface"); 1864 #ifdef ENABLE_BCM_PCM_WBS 1865 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1866 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1867 #else 1868 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1869 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1870 #endif 1871 #endif 1872 break; 1873 } 1874 #endif 1875 1876 #ifdef ENABLE_SCO_OVER_PCM 1877 /* fall through */ 1878 1879 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1880 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1881 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1882 log_info("BCM: Config PCM interface for I2S"); 1883 #ifdef ENABLE_BCM_PCM_WBS 1884 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1885 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1886 #else 1887 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1888 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1889 #endif 1890 break; 1891 } 1892 #endif 1893 #endif 1894 1895 #ifdef ENABLE_BLE 1896 /* fall through */ 1897 1898 // LE INIT 1899 case HCI_INIT_LE_READ_BUFFER_SIZE: 1900 if (hci_le_supported()){ 1901 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1902 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 1903 hci_send_cmd(&hci_le_read_buffer_size_v2); 1904 } else { 1905 hci_send_cmd(&hci_le_read_buffer_size); 1906 } 1907 break; 1908 } 1909 1910 /* fall through */ 1911 1912 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1913 // skip write le host if not supported (e.g. on LE only EM9301) 1914 if (hci_le_supported() 1915 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1916 // LE Supported Host = 1, Simultaneous Host = 0 1917 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1918 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1919 break; 1920 } 1921 1922 /* fall through */ 1923 1924 case HCI_INIT_LE_SET_EVENT_MASK: 1925 if (hci_le_supported()){ 1926 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1927 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1928 break; 1929 } 1930 #endif 1931 1932 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1933 /* fall through */ 1934 1935 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1936 if (hci_le_supported() 1937 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1938 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1939 hci_send_cmd(&hci_le_read_maximum_data_length); 1940 break; 1941 } 1942 1943 /* fall through */ 1944 1945 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1946 if (hci_le_supported() 1947 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1948 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1949 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1950 break; 1951 } 1952 #endif 1953 1954 #ifdef ENABLE_LE_CENTRAL 1955 /* fall through */ 1956 1957 case HCI_INIT_READ_WHITE_LIST_SIZE: 1958 if (hci_le_supported()){ 1959 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1960 hci_send_cmd(&hci_le_read_white_list_size); 1961 break; 1962 } 1963 1964 #endif 1965 1966 #ifdef ENABLE_LE_PERIPHERAL 1967 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1968 /* fall through */ 1969 1970 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1971 if (hci_extended_advertising_supported()){ 1972 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1973 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1974 break; 1975 } 1976 #endif 1977 #endif 1978 /* fall through */ 1979 1980 case HCI_INIT_DONE: 1981 hci_stack->substate = HCI_INIT_DONE; 1982 // main init sequence complete 1983 #ifdef ENABLE_CLASSIC 1984 // check if initial Classic GAP Tasks are completed 1985 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1986 hci_run_gap_tasks_classic(); 1987 break; 1988 } 1989 #endif 1990 #ifdef ENABLE_BLE 1991 #ifdef ENABLE_LE_CENTRAL 1992 // check if initial LE GAP Tasks are completed 1993 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1994 hci_run_general_gap_le(); 1995 break; 1996 } 1997 #endif 1998 #endif 1999 hci_init_done(); 2000 break; 2001 2002 default: 2003 return; 2004 } 2005 } 2006 2007 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2008 bool command_completed = false; 2009 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2010 uint16_t opcode = little_endian_read_16(packet,3); 2011 if (opcode == hci_stack->last_cmd_opcode){ 2012 command_completed = true; 2013 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2014 } else { 2015 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2016 } 2017 } 2018 2019 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2020 uint8_t status = packet[2]; 2021 uint16_t opcode = little_endian_read_16(packet,4); 2022 if (opcode == hci_stack->last_cmd_opcode){ 2023 if (status){ 2024 command_completed = true; 2025 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2026 } else { 2027 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2028 } 2029 } else { 2030 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2031 } 2032 } 2033 #ifndef HAVE_HOST_CONTROLLER_API 2034 // Vendor == CSR 2035 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2036 // TODO: track actual command 2037 command_completed = true; 2038 } 2039 2040 // Vendor == Toshiba 2041 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2042 // TODO: track actual command 2043 command_completed = true; 2044 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2045 hci_stack->num_cmd_packets = 1; 2046 } 2047 #endif 2048 2049 return command_completed; 2050 } 2051 2052 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2053 2054 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2055 2056 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2057 2058 #ifndef HAVE_HOST_CONTROLLER_API 2059 2060 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2061 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2062 // 2063 // HCI Reset 2064 // Timeout 100 ms 2065 // HCI Reset 2066 // Command Complete Reset 2067 // HCI Read Local Version Information 2068 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2069 // hang... 2070 // 2071 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2072 if (!command_completed 2073 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2074 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2075 2076 uint16_t opcode = little_endian_read_16(packet,3); 2077 if (opcode == hci_reset.opcode){ 2078 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2079 return; 2080 } 2081 } 2082 2083 // CSR & H5 2084 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2085 if (!command_completed 2086 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2087 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2088 2089 uint16_t opcode = little_endian_read_16(packet,3); 2090 if (opcode == hci_reset.opcode){ 2091 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2092 return; 2093 } 2094 } 2095 2096 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2097 // fix: Correct substate and behave as command below 2098 if (command_completed){ 2099 switch (hci_stack->substate){ 2100 case HCI_INIT_SEND_RESET: 2101 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2102 break; 2103 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2104 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2105 break; 2106 default: 2107 break; 2108 } 2109 } 2110 2111 #endif 2112 2113 if (!command_completed) return; 2114 2115 bool need_baud_change = false; 2116 bool need_addr_change = false; 2117 2118 #ifndef HAVE_HOST_CONTROLLER_API 2119 need_baud_change = hci_stack->config 2120 && hci_stack->chipset 2121 && hci_stack->chipset->set_baudrate_command 2122 && hci_stack->hci_transport->set_baudrate 2123 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2124 2125 need_addr_change = hci_stack->custom_bd_addr_set 2126 && hci_stack->chipset 2127 && hci_stack->chipset->set_bd_addr_command; 2128 #endif 2129 2130 switch(hci_stack->substate){ 2131 2132 #ifndef HAVE_HOST_CONTROLLER_API 2133 case HCI_INIT_SEND_RESET: 2134 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2135 // fix: just correct substate and behave as command below 2136 2137 /* fall through */ 2138 #endif 2139 2140 case HCI_INIT_W4_SEND_RESET: 2141 btstack_run_loop_remove_timer(&hci_stack->timeout); 2142 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2143 return; 2144 2145 #ifndef HAVE_HOST_CONTROLLER_API 2146 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2147 // for STLC2500D, baud rate change already happened. 2148 // for others, baud rate gets changed now 2149 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2150 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2151 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2152 hci_stack->hci_transport->set_baudrate(baud_rate); 2153 } 2154 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2155 return; 2156 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2157 btstack_run_loop_remove_timer(&hci_stack->timeout); 2158 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2159 return; 2160 case HCI_INIT_W4_CUSTOM_INIT: 2161 // repeat custom init 2162 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2163 return; 2164 #endif 2165 2166 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2167 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2168 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2169 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2170 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2171 return; 2172 } 2173 if (need_addr_change){ 2174 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2175 return; 2176 } 2177 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2178 return; 2179 #ifndef HAVE_HOST_CONTROLLER_API 2180 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2181 if (need_baud_change){ 2182 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2183 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2184 hci_stack->hci_transport->set_baudrate(baud_rate); 2185 } 2186 if (need_addr_change){ 2187 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2188 return; 2189 } 2190 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2191 return; 2192 case HCI_INIT_W4_SET_BD_ADDR: 2193 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2194 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2195 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2196 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2197 return; 2198 } 2199 // skipping st warm boot 2200 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2201 return; 2202 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2203 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2204 return; 2205 #endif 2206 2207 case HCI_INIT_DONE: 2208 // set state if we came here by fall through 2209 hci_stack->substate = HCI_INIT_DONE; 2210 return; 2211 2212 default: 2213 break; 2214 } 2215 hci_initializing_next_state(); 2216 } 2217 2218 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2219 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2220 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2221 // check if we have been aware of the HCI connection 2222 switch (conn->state){ 2223 case SENT_CREATE_CONNECTION: 2224 case RECEIVED_CONNECTION_REQUEST: 2225 break; 2226 default: 2227 return; 2228 } 2229 2230 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2231 bd_addr_t bd_address; 2232 (void)memcpy(&bd_address, conn->address, 6); 2233 2234 #ifdef ENABLE_CLASSIC 2235 // cache needed data 2236 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2237 #endif 2238 2239 // connection failed, remove entry 2240 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2241 btstack_memory_hci_connection_free( conn ); 2242 2243 #ifdef ENABLE_CLASSIC 2244 // notify client if dedicated bonding 2245 if (notify_dedicated_bonding_failed){ 2246 log_info("hci notify_dedicated_bonding_failed"); 2247 hci_emit_dedicated_bonding_result(bd_address, status); 2248 } 2249 2250 // if authentication error, also delete link key 2251 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2252 gap_drop_link_key_for_bd_addr(bd_address); 2253 } 2254 #else 2255 UNUSED(status); 2256 #endif 2257 } 2258 2259 #ifdef ENABLE_CLASSIC 2260 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2261 // SSP Controller 2262 if (features[6] & (1 << 3)){ 2263 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2264 } 2265 // eSCO 2266 if (features[3] & (1<<7)){ 2267 conn->remote_supported_features[0] |= 1; 2268 } 2269 // Extended features 2270 if (features[7] & (1<<7)){ 2271 conn->remote_supported_features[0] |= 2; 2272 } 2273 } 2274 2275 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2276 // SSP Host 2277 if (features[0] & (1 << 0)){ 2278 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2279 } 2280 // SC Host 2281 if (features[0] & (1 << 3)){ 2282 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2283 } 2284 } 2285 2286 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2287 // SC Controller 2288 if (features[1] & (1 << 0)){ 2289 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2290 } 2291 } 2292 2293 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2294 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2295 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2296 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2297 if (conn->bonding_flags & BONDING_DEDICATED){ 2298 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2299 } 2300 } 2301 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2302 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2303 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2304 } 2305 2306 #endif 2307 2308 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2309 // handle BT initialization 2310 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2311 hci_initializing_event_handler(packet, size); 2312 } 2313 2314 // help with BT sleep 2315 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2316 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2317 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2318 hci_initializing_next_state(); 2319 } 2320 } 2321 2322 #ifdef ENABLE_CLASSIC 2323 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2324 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2325 conn->encryption_key_size = encryption_key_size; 2326 2327 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2328 conn->requested_security_level = LEVEL_0; 2329 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2330 return; 2331 } 2332 2333 // Request remote features if not already done 2334 hci_trigger_remote_features_for_connection(conn); 2335 2336 // Request Authentication if not already done 2337 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2338 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2339 } 2340 #endif 2341 2342 static void hci_store_local_supported_commands(const uint8_t * packet){ 2343 // create mapping table 2344 #define X(name, offset, bit) { offset, bit }, 2345 static struct { 2346 uint8_t byte_offset; 2347 uint8_t bit_position; 2348 } supported_hci_commands_map [] = { 2349 SUPPORTED_HCI_COMMANDS 2350 }; 2351 #undef X 2352 2353 // create names for debug purposes 2354 #ifdef ENABLE_LOG_DEBUG 2355 #define X(name, offset, bit) #name, 2356 static const char * command_names[] = { 2357 SUPPORTED_HCI_COMMANDS 2358 }; 2359 #undef X 2360 #endif 2361 2362 hci_stack->local_supported_commands = 0; 2363 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2364 uint16_t i; 2365 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2366 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2367 #ifdef ENABLE_LOG_DEBUG 2368 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); 2369 #else 2370 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2371 #endif 2372 hci_stack->local_supported_commands |= (1LU << i); 2373 } 2374 } 2375 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2376 } 2377 2378 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2379 UNUSED(size); 2380 2381 uint16_t manufacturer; 2382 #ifdef ENABLE_CLASSIC 2383 hci_con_handle_t handle; 2384 hci_connection_t * conn; 2385 uint8_t status; 2386 #endif 2387 // get num cmd packets - limit to 1 to reduce complexity 2388 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2389 2390 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2391 switch (opcode){ 2392 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2393 if (packet[5]) break; 2394 // terminate, name 248 chars 2395 packet[6+248] = 0; 2396 log_info("local name: %s", &packet[6]); 2397 break; 2398 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2399 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2400 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2401 uint16_t acl_len = little_endian_read_16(packet, 6); 2402 uint16_t sco_len = packet[8]; 2403 2404 // determine usable ACL/SCO payload size 2405 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2406 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2407 2408 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2409 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2410 2411 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2412 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2413 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2414 } 2415 break; 2416 case HCI_OPCODE_HCI_READ_RSSI: 2417 if (packet[5] == ERROR_CODE_SUCCESS){ 2418 uint8_t event[5]; 2419 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2420 event[1] = 3; 2421 (void)memcpy(&event[2], &packet[6], 3); 2422 hci_emit_event(event, sizeof(event), 1); 2423 } 2424 break; 2425 #ifdef ENABLE_BLE 2426 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2427 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2428 hci_stack->le_iso_packets_total_num = packet[11]; 2429 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2430 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2431 2432 /* fall through */ 2433 2434 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2435 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2436 hci_stack->le_acl_packets_total_num = packet[8]; 2437 // determine usable ACL payload size 2438 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2439 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2440 } 2441 log_info("hci_le_read_buffer_size: acl size %u, acl count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2442 break; 2443 #endif 2444 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2445 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2446 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2447 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2448 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); 2449 break; 2450 #endif 2451 #ifdef ENABLE_LE_CENTRAL 2452 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2453 hci_stack->le_whitelist_capacity = packet[6]; 2454 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2455 break; 2456 #endif 2457 #ifdef ENABLE_LE_PERIPHERAL 2458 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2459 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2460 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2461 break; 2462 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2463 if (hci_stack->le_advertising_set_in_current_command != 0) { 2464 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2465 hci_stack->le_advertising_set_in_current_command = 0; 2466 if (advertising_set == NULL) break; 2467 uint8_t adv_status = packet[6]; 2468 uint8_t tx_power = packet[7]; 2469 uint8_t event[] = { HCI_EVENT_META_GAP, 4, GAP_SUBEVENT_ADVERTISING_SET_INSTALLED, hci_stack->le_advertising_set_in_current_command, adv_status, tx_power }; 2470 if (adv_status == 0){ 2471 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2472 } 2473 hci_emit_event(event, sizeof(event), 1); 2474 } 2475 break; 2476 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2477 if (hci_stack->le_advertising_set_in_current_command != 0) { 2478 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2479 hci_stack->le_advertising_set_in_current_command = 0; 2480 if (advertising_set == NULL) break; 2481 uint8_t adv_status = packet[5]; 2482 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2483 if (adv_status == 0){ 2484 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2485 } 2486 hci_emit_event(event, sizeof(event), 1); 2487 } 2488 break; 2489 #endif 2490 #endif 2491 case HCI_OPCODE_HCI_READ_BD_ADDR: 2492 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2493 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)); 2494 #ifdef ENABLE_CLASSIC 2495 if (hci_stack->link_key_db){ 2496 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2497 } 2498 #endif 2499 break; 2500 #ifdef ENABLE_CLASSIC 2501 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2502 hci_emit_discoverable_enabled(hci_stack->discoverable); 2503 break; 2504 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2505 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2506 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2507 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2508 hci_emit_event(event, sizeof(event), 1); 2509 } 2510 break; 2511 #endif 2512 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2513 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2514 2515 #ifdef ENABLE_CLASSIC 2516 // determine usable ACL packet types based on host buffer size and supported features 2517 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2518 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2519 #endif 2520 // Classic/LE 2521 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2522 break; 2523 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2524 manufacturer = little_endian_read_16(packet, 10); 2525 // map Cypress to Broadcom 2526 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2527 log_info("Treat Cypress as Broadcom"); 2528 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2529 little_endian_store_16(packet, 10, manufacturer); 2530 } 2531 hci_stack->manufacturer = manufacturer; 2532 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2533 break; 2534 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2535 hci_store_local_supported_commands(packet); 2536 break; 2537 #ifdef ENABLE_CLASSIC 2538 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2539 if (packet[5]) return; 2540 hci_stack->synchronous_flow_control_enabled = 1; 2541 break; 2542 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2543 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2544 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2545 conn = hci_connection_for_handle(handle); 2546 if (conn != NULL) { 2547 uint8_t key_size = 0; 2548 if (status == 0){ 2549 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2550 log_info("Handle %04x key Size: %u", handle, key_size); 2551 } else { 2552 key_size = 1; 2553 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2554 } 2555 hci_handle_read_encryption_key_size_complete(conn, key_size); 2556 } 2557 break; 2558 // assert pairing complete event is emitted. 2559 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2560 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2561 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2562 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2563 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2564 // lookup connection by gap pairing addr 2565 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2566 if (conn == NULL) break; 2567 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2568 break; 2569 2570 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2571 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2572 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2573 uint8_t event[67]; 2574 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2575 event[1] = 65; 2576 (void)memset(&event[2], 0, 65); 2577 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2578 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2579 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2580 event[2] = 3; 2581 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2582 } else { 2583 event[2] = 1; 2584 } 2585 } 2586 hci_emit_event(event, sizeof(event), 0); 2587 break; 2588 } 2589 2590 // note: only needed if user does not provide OOB data 2591 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2592 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2593 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2594 if (conn == NULL) break; 2595 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2596 break; 2597 #endif 2598 #endif 2599 default: 2600 break; 2601 } 2602 } 2603 2604 #ifdef ENABLE_BLE 2605 static void event_handle_le_connection_complete(const uint8_t * packet){ 2606 bd_addr_t addr; 2607 bd_addr_type_t addr_type; 2608 hci_connection_t * conn; 2609 2610 // Connection management 2611 reverse_bd_addr(&packet[8], addr); 2612 addr_type = (bd_addr_type_t)packet[7]; 2613 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2614 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2615 2616 #ifdef ENABLE_LE_CENTRAL 2617 // handle error: error is reported only to the initiator -> outgoing connection 2618 if (packet[3]){ 2619 2620 // handle cancelled outgoing connection 2621 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2622 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2623 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2624 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2625 // reset state 2626 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2627 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2628 // get outgoing connection conn struct for direct connect 2629 conn = gap_get_outgoing_connection(); 2630 } 2631 2632 // outgoing le connection establishment is done 2633 if (conn){ 2634 // remove entry 2635 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2636 btstack_memory_hci_connection_free( conn ); 2637 } 2638 return; 2639 } 2640 #endif 2641 2642 // on success, both hosts receive connection complete event 2643 if (packet[6] == HCI_ROLE_MASTER){ 2644 #ifdef ENABLE_LE_CENTRAL 2645 // if we're master on an le connection, it was an outgoing connection and we're done with it 2646 // note: no hci_connection_t object exists yet for connect with whitelist 2647 if (hci_is_le_connection_type(addr_type)){ 2648 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2649 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2650 } 2651 #endif 2652 } else { 2653 #ifdef ENABLE_LE_PERIPHERAL 2654 // if we're slave, it was an incoming connection, advertisements have stopped 2655 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2656 #endif 2657 } 2658 2659 // LE connections are auto-accepted, so just create a connection if there isn't one already 2660 if (!conn){ 2661 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2662 } 2663 2664 // no memory, sorry. 2665 if (!conn){ 2666 return; 2667 } 2668 2669 conn->state = OPEN; 2670 conn->role = packet[6]; 2671 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2672 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2673 2674 #ifdef ENABLE_LE_PERIPHERAL 2675 if (packet[6] == HCI_ROLE_SLAVE){ 2676 hci_update_advertisements_enabled_for_current_roles(); 2677 } 2678 #endif 2679 2680 // init unenhanced att bearer mtu 2681 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2682 conn->att_connection.mtu_exchanged = false; 2683 2684 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2685 2686 // restart timer 2687 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2688 // btstack_run_loop_add_timer(&conn->timeout); 2689 2690 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2691 2692 hci_emit_nr_connections_changed(); 2693 } 2694 #endif 2695 2696 #ifdef ENABLE_CLASSIC 2697 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){ 2698 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2699 // LEVEL_4 is tested by l2cap 2700 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2701 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2702 if (level >= LEVEL_3){ 2703 // MITM not possible without keyboard or display 2704 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2705 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2706 2707 // MITM possible if one side has keyboard and the other has keyboard or display 2708 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2709 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2710 2711 // MITM not possible if one side has only display and other side has no keyboard 2712 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2713 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2714 } 2715 // LEVEL 2 requires SSP, which is a given 2716 return true; 2717 } 2718 2719 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2720 uint16_t i; 2721 for (i=0; i < size ; i++){ 2722 if (data[i] != 0) { 2723 return false; 2724 } 2725 } 2726 return true; 2727 } 2728 2729 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2730 // get requested security level 2731 gap_security_level_t requested_security_level = conn->requested_security_level; 2732 if (hci_stack->gap_secure_connections_only_mode){ 2733 requested_security_level = LEVEL_4; 2734 } 2735 2736 // assess security: LEVEL 4 requires SC 2737 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2738 if ((requested_security_level == LEVEL_4) && 2739 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2740 !hci_remote_sc_enabled(conn)){ 2741 log_info("Level 4 required, but SC not supported -> abort"); 2742 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2743 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2744 return; 2745 } 2746 2747 // assess security based on io capabilities 2748 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2749 // responder: fully validate io caps of both sides as well as OOB data 2750 bool security_possible = false; 2751 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2752 2753 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2754 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2755 // so we merge the OOB data availability 2756 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2757 if (conn->classic_oob_c_192 != NULL){ 2758 have_oob_data |= 1; 2759 } 2760 if (conn->classic_oob_c_256 != NULL){ 2761 have_oob_data |= 2; 2762 } 2763 // for up to Level 3, either P-192 as well as P-256 will do 2764 // 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 2765 // if remote does not SC, we should not receive P-256 data either 2766 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2767 security_possible = true; 2768 } 2769 // for Level 4, P-256 is needed 2770 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2771 security_possible = true; 2772 } 2773 #endif 2774 2775 if (security_possible == false){ 2776 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2777 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2778 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2779 return; 2780 } 2781 } else { 2782 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2783 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2784 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2785 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2786 log_info("Level 3+ required, but no input/output -> abort"); 2787 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2788 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2789 return; 2790 } 2791 #endif 2792 #endif 2793 } 2794 2795 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2796 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2797 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2798 } else { 2799 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2800 } 2801 #endif 2802 } 2803 2804 #endif 2805 2806 static void event_handler(uint8_t *packet, uint16_t size){ 2807 2808 uint16_t event_length = packet[1]; 2809 2810 // assert packet is complete 2811 if (size != (event_length + 2u)){ 2812 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2813 return; 2814 } 2815 2816 bd_addr_type_t addr_type; 2817 hci_con_handle_t handle; 2818 hci_connection_t * conn; 2819 int i; 2820 int create_connection_cmd; 2821 2822 #ifdef ENABLE_CLASSIC 2823 hci_link_type_t link_type; 2824 bd_addr_t addr; 2825 #endif 2826 2827 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2828 2829 switch (hci_event_packet_get_type(packet)) { 2830 2831 case HCI_EVENT_COMMAND_COMPLETE: 2832 handle_command_complete_event(packet, size); 2833 break; 2834 2835 case HCI_EVENT_COMMAND_STATUS: 2836 // get num cmd packets - limit to 1 to reduce complexity 2837 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2838 2839 // check command status to detected failed outgoing connections 2840 create_connection_cmd = 0; 2841 #ifdef ENABLE_CLASSIC 2842 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2843 create_connection_cmd = 1; 2844 } 2845 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2846 create_connection_cmd = 1; 2847 } 2848 #endif 2849 #ifdef ENABLE_LE_CENTRAL 2850 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2851 create_connection_cmd = 1; 2852 } 2853 #endif 2854 if (create_connection_cmd) { 2855 uint8_t status = hci_event_command_status_get_status(packet); 2856 addr_type = hci_stack->outgoing_addr_type; 2857 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2858 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); 2859 2860 // reset outgoing address info 2861 memset(hci_stack->outgoing_addr, 0, 6); 2862 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2863 2864 // on error 2865 if (status != ERROR_CODE_SUCCESS){ 2866 #ifdef ENABLE_LE_CENTRAL 2867 if (hci_is_le_connection_type(addr_type)){ 2868 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2869 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2870 } 2871 #endif 2872 // error => outgoing connection failed 2873 if (conn != NULL){ 2874 hci_handle_connection_failed(conn, status); 2875 } 2876 } 2877 } 2878 2879 #ifdef ENABLE_CLASSIC 2880 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2881 uint8_t status = hci_event_command_status_get_status(packet); 2882 log_info("command status (inquiry), status %x", status); 2883 if (status == ERROR_CODE_SUCCESS) { 2884 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2885 } else { 2886 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2887 } 2888 } 2889 #endif 2890 break; 2891 2892 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2893 if (size < 3) return; 2894 uint16_t num_handles = packet[2]; 2895 if (size != (3u + num_handles * 4u)) return; 2896 uint16_t offset = 3; 2897 for (i=0; i<num_handles;i++){ 2898 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2899 offset += 2u; 2900 uint16_t num_packets = little_endian_read_16(packet, offset); 2901 offset += 2u; 2902 2903 conn = hci_connection_for_handle(handle); 2904 if (!conn){ 2905 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2906 continue; 2907 } 2908 2909 if (conn->num_packets_sent >= num_packets){ 2910 conn->num_packets_sent -= num_packets; 2911 } else { 2912 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2913 conn->num_packets_sent = 0; 2914 } 2915 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2916 2917 #ifdef ENABLE_CLASSIC 2918 // For SCO, we do the can_send_now_check here 2919 hci_notify_if_sco_can_send_now(); 2920 #endif 2921 } 2922 break; 2923 } 2924 2925 #ifdef ENABLE_CLASSIC 2926 case HCI_EVENT_FLUSH_OCCURRED: 2927 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 2928 handle = hci_event_flush_occurred_get_handle(packet); 2929 conn = hci_connection_for_handle(handle); 2930 if (conn) { 2931 log_info("Flush occurred, disconnect 0x%04x", handle); 2932 conn->state = SEND_DISCONNECT; 2933 } 2934 break; 2935 2936 case HCI_EVENT_INQUIRY_COMPLETE: 2937 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2938 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2939 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2940 hci_emit_event(event, sizeof(event), 1); 2941 } 2942 break; 2943 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2944 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2945 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2946 } 2947 break; 2948 case HCI_EVENT_CONNECTION_REQUEST: 2949 reverse_bd_addr(&packet[2], addr); 2950 link_type = (hci_link_type_t) packet[11]; 2951 2952 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2953 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2954 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2955 bd_addr_copy(hci_stack->decline_addr, addr); 2956 break; 2957 } 2958 2959 if (hci_stack->gap_classic_accept_callback != NULL){ 2960 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2961 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2962 bd_addr_copy(hci_stack->decline_addr, addr); 2963 break; 2964 } 2965 } 2966 2967 // TODO: eval COD 8-10 2968 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2969 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2970 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2971 if (!conn) { 2972 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2973 } 2974 if (!conn) { 2975 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2976 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2977 bd_addr_copy(hci_stack->decline_addr, addr); 2978 hci_run(); 2979 // avoid event to higher layer 2980 return; 2981 } 2982 conn->role = HCI_ROLE_SLAVE; 2983 conn->state = RECEIVED_CONNECTION_REQUEST; 2984 // store info about eSCO 2985 if (link_type == HCI_LINK_TYPE_ESCO){ 2986 conn->remote_supported_features[0] |= 1; 2987 } 2988 hci_run(); 2989 break; 2990 2991 case HCI_EVENT_CONNECTION_COMPLETE: 2992 // Connection management 2993 reverse_bd_addr(&packet[5], addr); 2994 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2995 addr_type = BD_ADDR_TYPE_ACL; 2996 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2997 if (conn) { 2998 if (!packet[2]){ 2999 conn->state = OPEN; 3000 conn->con_handle = little_endian_read_16(packet, 3); 3001 3002 // trigger write supervision timeout if we're master 3003 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3004 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3005 } 3006 3007 // trigger write automatic flush timeout 3008 if (hci_stack->automatic_flush_timeout != 0){ 3009 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3010 } 3011 3012 // restart timer 3013 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3014 btstack_run_loop_add_timer(&conn->timeout); 3015 3016 // trigger remote features for dedicated bonding 3017 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3018 hci_trigger_remote_features_for_connection(conn); 3019 } 3020 3021 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3022 3023 hci_emit_nr_connections_changed(); 3024 } else { 3025 // connection failed 3026 hci_handle_connection_failed(conn, packet[2]); 3027 } 3028 } 3029 break; 3030 3031 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3032 reverse_bd_addr(&packet[5], addr); 3033 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3034 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3035 if (packet[2]){ 3036 // connection failed 3037 if (conn){ 3038 hci_handle_connection_failed(conn, packet[2]); 3039 } 3040 break; 3041 } 3042 if (!conn) { 3043 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3044 } 3045 if (!conn) { 3046 break; 3047 } 3048 conn->state = OPEN; 3049 conn->con_handle = little_endian_read_16(packet, 3); 3050 3051 #ifdef ENABLE_SCO_OVER_HCI 3052 // update SCO 3053 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3054 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3055 } 3056 // trigger can send now 3057 if (hci_have_usb_transport()){ 3058 hci_stack->sco_can_send_now = true; 3059 } 3060 #endif 3061 #ifdef HAVE_SCO_TRANSPORT 3062 // configure sco transport 3063 if (hci_stack->sco_transport != NULL){ 3064 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3065 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3066 } 3067 #endif 3068 break; 3069 3070 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3071 handle = little_endian_read_16(packet, 3); 3072 conn = hci_connection_for_handle(handle); 3073 if (!conn) break; 3074 if (!packet[2]){ 3075 const uint8_t * features = &packet[5]; 3076 hci_handle_remote_features_page_0(conn, features); 3077 3078 // read extended features if possible 3079 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3080 && ((conn->remote_supported_features[0] & 2) != 0)) { 3081 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3082 break; 3083 } 3084 } 3085 hci_handle_remote_features_received(conn); 3086 break; 3087 3088 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3089 handle = little_endian_read_16(packet, 3); 3090 conn = hci_connection_for_handle(handle); 3091 if (!conn) break; 3092 // status = ok, page = 1 3093 if (!packet[2]) { 3094 uint8_t page_number = packet[5]; 3095 uint8_t maximum_page_number = packet[6]; 3096 const uint8_t * features = &packet[7]; 3097 bool done = false; 3098 switch (page_number){ 3099 case 1: 3100 hci_handle_remote_features_page_1(conn, features); 3101 if (maximum_page_number >= 2){ 3102 // get Secure Connections (Controller) from Page 2 if available 3103 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3104 } else { 3105 // otherwise, assume SC (Controller) == SC (Host) 3106 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3107 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3108 } 3109 done = true; 3110 } 3111 break; 3112 case 2: 3113 hci_handle_remote_features_page_2(conn, features); 3114 done = true; 3115 break; 3116 default: 3117 break; 3118 } 3119 if (!done) break; 3120 } 3121 hci_handle_remote_features_received(conn); 3122 break; 3123 3124 case HCI_EVENT_LINK_KEY_REQUEST: 3125 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3126 hci_event_link_key_request_get_bd_addr(packet, addr); 3127 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3128 if (!conn) break; 3129 3130 // lookup link key in db if not cached 3131 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3132 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3133 } 3134 3135 // response sent by hci_run() 3136 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3137 #endif 3138 break; 3139 3140 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3141 hci_event_link_key_request_get_bd_addr(packet, addr); 3142 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3143 if (!conn) break; 3144 3145 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3146 3147 // CVE-2020-26555: ignore NULL link key 3148 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3149 if (btstack_is_null(&packet[8], 16)) break; 3150 3151 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3152 // Change Connection Encryption keeps link key type 3153 if (link_key_type != CHANGED_COMBINATION_KEY){ 3154 conn->link_key_type = link_key_type; 3155 } 3156 3157 // cache link key. link keys stored in little-endian format for legacy reasons 3158 memcpy(&conn->link_key, &packet[8], 16); 3159 3160 // only store link key: 3161 // - if bondable enabled 3162 if (hci_stack->bondable == false) break; 3163 // - if security level sufficient 3164 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3165 // - for SSP, also check if remote side requested bonding as well 3166 if (conn->link_key_type != COMBINATION_KEY){ 3167 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3168 if (!remote_bonding){ 3169 break; 3170 } 3171 } 3172 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3173 break; 3174 } 3175 3176 case HCI_EVENT_PIN_CODE_REQUEST: 3177 hci_event_pin_code_request_get_bd_addr(packet, addr); 3178 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3179 if (!conn) break; 3180 3181 hci_pairing_started(conn, false); 3182 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3183 if (!hci_stack->bondable ){ 3184 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3185 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3186 hci_run(); 3187 return; 3188 } 3189 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3190 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3191 log_info("Level 4 required, but SC not supported -> abort"); 3192 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3193 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3194 hci_run(); 3195 return; 3196 } 3197 break; 3198 3199 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3200 hci_event_io_capability_response_get_bd_addr(packet, addr); 3201 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3202 if (!conn) break; 3203 3204 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3205 hci_pairing_started(conn, true); 3206 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3207 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3208 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3209 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3210 #endif 3211 break; 3212 3213 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3214 hci_event_io_capability_response_get_bd_addr(packet, addr); 3215 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3216 if (!conn) break; 3217 3218 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3219 hci_connection_timestamp(conn); 3220 hci_pairing_started(conn, true); 3221 break; 3222 3223 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3224 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3225 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3226 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3227 if (!conn) break; 3228 3229 hci_connection_timestamp(conn); 3230 3231 hci_pairing_started(conn, true); 3232 3233 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3234 break; 3235 #endif 3236 3237 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3238 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3239 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3240 if (!conn) break; 3241 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3242 if (hci_stack->ssp_auto_accept){ 3243 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3244 }; 3245 } else { 3246 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3247 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3248 // don't forward event to app 3249 hci_run(); 3250 return; 3251 } 3252 break; 3253 3254 case HCI_EVENT_USER_PASSKEY_REQUEST: 3255 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3256 if (hci_stack->ssp_auto_accept){ 3257 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3258 }; 3259 break; 3260 3261 case HCI_EVENT_MODE_CHANGE: 3262 handle = hci_event_mode_change_get_handle(packet); 3263 conn = hci_connection_for_handle(handle); 3264 if (!conn) break; 3265 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3266 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3267 break; 3268 #endif 3269 3270 case HCI_EVENT_ENCRYPTION_CHANGE: 3271 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3272 handle = hci_event_encryption_change_get_connection_handle(packet); 3273 conn = hci_connection_for_handle(handle); 3274 if (!conn) break; 3275 if (hci_event_encryption_change_get_status(packet) == 0u) { 3276 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3277 if (encryption_enabled){ 3278 if (hci_is_le_connection(conn)){ 3279 // For LE, we accept connection as encrypted 3280 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3281 } 3282 #ifdef ENABLE_CLASSIC 3283 else { 3284 3285 // dedicated bonding: send result and disconnect 3286 if (conn->bonding_flags & BONDING_DEDICATED){ 3287 conn->bonding_flags &= ~BONDING_DEDICATED; 3288 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3289 conn->bonding_status = packet[2]; 3290 break; 3291 } 3292 3293 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3294 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3295 bool connected_uses_aes_ccm = encryption_enabled == 2; 3296 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3297 log_info("SC during pairing, but only E0 now -> abort"); 3298 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3299 break; 3300 } 3301 3302 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3303 if (connected_uses_aes_ccm){ 3304 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3305 } 3306 3307 #ifdef ENABLE_TESTING_SUPPORT 3308 // work around for issue with PTS dongle 3309 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3310 #endif 3311 // validate encryption key size 3312 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3313 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3314 // already got encryption key size 3315 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3316 } else { 3317 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3318 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3319 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3320 } else { 3321 // if not, pretend everything is perfect 3322 hci_handle_read_encryption_key_size_complete(conn, 16); 3323 } 3324 } 3325 } 3326 #endif 3327 } else { 3328 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3329 } 3330 } 3331 3332 break; 3333 3334 #ifdef ENABLE_CLASSIC 3335 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3336 handle = hci_event_authentication_complete_get_connection_handle(packet); 3337 conn = hci_connection_for_handle(handle); 3338 if (!conn) break; 3339 3340 // clear authentication active flag 3341 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3342 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3343 3344 // authenticated only if auth status == 0 3345 if (hci_event_authentication_complete_get_status(packet) == 0){ 3346 // authenticated 3347 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3348 3349 // If not already encrypted, start encryption 3350 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3351 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3352 break; 3353 } 3354 } 3355 3356 // emit updated security level 3357 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3358 break; 3359 3360 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3361 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3362 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3363 if (!conn) break; 3364 3365 // treat successfully paired connection as authenticated 3366 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3367 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3368 } 3369 3370 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3371 break; 3372 #endif 3373 3374 // HCI_EVENT_DISCONNECTION_COMPLETE 3375 // has been split, to first notify stack before shutting connection down 3376 // see end of function, too. 3377 case HCI_EVENT_DISCONNECTION_COMPLETE: 3378 if (packet[2]) break; // status != 0 3379 handle = little_endian_read_16(packet, 3); 3380 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3381 if (hci_stack->acl_fragmentation_total_size > 0u) { 3382 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3383 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3384 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3385 hci_stack->acl_fragmentation_total_size = 0; 3386 hci_stack->acl_fragmentation_pos = 0; 3387 if (release_buffer){ 3388 hci_release_packet_buffer(); 3389 } 3390 } 3391 } 3392 3393 conn = hci_connection_for_handle(handle); 3394 if (!conn) break; 3395 #ifdef ENABLE_CLASSIC 3396 // pairing failed if it was ongoing 3397 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3398 #endif 3399 3400 // emit dedicatd bonding event 3401 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3402 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3403 } 3404 3405 // mark connection for shutdown, stop timers, reset state 3406 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3407 hci_connection_stop_timer(conn); 3408 hci_connection_init(conn); 3409 3410 #ifdef ENABLE_BLE 3411 #ifdef ENABLE_LE_PERIPHERAL 3412 // re-enable advertisements for le connections if active 3413 if (hci_is_le_connection(conn)){ 3414 hci_update_advertisements_enabled_for_current_roles(); 3415 } 3416 #endif 3417 #endif 3418 break; 3419 3420 case HCI_EVENT_HARDWARE_ERROR: 3421 log_error("Hardware Error: 0x%02x", packet[2]); 3422 if (hci_stack->hardware_error_callback){ 3423 (*hci_stack->hardware_error_callback)(packet[2]); 3424 } else { 3425 // if no special requests, just reboot stack 3426 hci_power_control_off(); 3427 hci_power_control_on(); 3428 } 3429 break; 3430 3431 #ifdef ENABLE_CLASSIC 3432 case HCI_EVENT_ROLE_CHANGE: 3433 if (packet[2]) break; // status != 0 3434 reverse_bd_addr(&packet[3], addr); 3435 addr_type = BD_ADDR_TYPE_ACL; 3436 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3437 if (!conn) break; 3438 conn->role = packet[9]; 3439 break; 3440 #endif 3441 3442 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3443 // release packet buffer only for asynchronous transport and if there are not further fragements 3444 if (hci_transport_synchronous()) { 3445 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3446 return; // instead of break: to avoid re-entering hci_run() 3447 } 3448 hci_stack->acl_fragmentation_tx_active = 0; 3449 if (hci_stack->acl_fragmentation_total_size) break; 3450 hci_release_packet_buffer(); 3451 3452 // L2CAP receives this event via the hci_emit_event below 3453 3454 #ifdef ENABLE_CLASSIC 3455 // For SCO, we do the can_send_now_check here 3456 hci_notify_if_sco_can_send_now(); 3457 #endif 3458 break; 3459 3460 #ifdef ENABLE_CLASSIC 3461 case HCI_EVENT_SCO_CAN_SEND_NOW: 3462 // For SCO, we do the can_send_now_check here 3463 hci_stack->sco_can_send_now = true; 3464 hci_notify_if_sco_can_send_now(); 3465 return; 3466 3467 // explode inquriy results for easier consumption 3468 case HCI_EVENT_INQUIRY_RESULT: 3469 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3470 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3471 gap_inquiry_explode(packet, size); 3472 break; 3473 #endif 3474 3475 #ifdef ENABLE_BLE 3476 case HCI_EVENT_LE_META: 3477 switch (packet[2]){ 3478 #ifdef ENABLE_LE_CENTRAL 3479 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3480 if (!hci_stack->le_scanning_enabled) break; 3481 le_handle_advertisement_report(packet, size); 3482 break; 3483 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3484 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3485 if (!hci_stack->le_scanning_enabled) break; 3486 le_handle_extended_advertisement_report(packet, size); 3487 break; 3488 #endif 3489 #endif 3490 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3491 event_handle_le_connection_complete(packet); 3492 break; 3493 3494 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3495 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3496 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3497 conn = hci_connection_for_handle(handle); 3498 if (!conn) break; 3499 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3500 break; 3501 3502 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3503 // connection 3504 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3505 conn = hci_connection_for_handle(handle); 3506 if (conn) { 3507 // read arguments 3508 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3509 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3510 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3511 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3512 3513 // validate against current connection parameter range 3514 le_connection_parameter_range_t existing_range; 3515 gap_get_connection_parameter_range(&existing_range); 3516 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3517 if (update_parameter){ 3518 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3519 conn->le_conn_interval_min = le_conn_interval_min; 3520 conn->le_conn_interval_max = le_conn_interval_max; 3521 conn->le_conn_latency = le_conn_latency; 3522 conn->le_supervision_timeout = le_supervision_timeout; 3523 } else { 3524 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3525 } 3526 } 3527 break; 3528 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3529 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3530 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3531 conn = hci_connection_for_handle(handle); 3532 if (conn) { 3533 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3534 } 3535 break; 3536 #endif 3537 default: 3538 break; 3539 } 3540 break; 3541 #endif 3542 case HCI_EVENT_VENDOR_SPECIFIC: 3543 // Vendor specific commands often create vendor specific event instead of num completed packets 3544 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3545 switch (hci_stack->manufacturer){ 3546 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3547 hci_stack->num_cmd_packets = 1; 3548 break; 3549 default: 3550 break; 3551 } 3552 break; 3553 default: 3554 break; 3555 } 3556 3557 handle_event_for_current_stack_state(packet, size); 3558 3559 // notify upper stack 3560 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3561 3562 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3563 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3564 handle = little_endian_read_16(packet, 3); 3565 hci_connection_t * aConn = hci_connection_for_handle(handle); 3566 // discard connection if app did not trigger a reconnect in the event handler 3567 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3568 hci_shutdown_connection(aConn); 3569 } 3570 } 3571 3572 // execute main loop 3573 hci_run(); 3574 } 3575 3576 #ifdef ENABLE_CLASSIC 3577 3578 #ifdef ENABLE_SCO_OVER_HCI 3579 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3580 static void sco_schedule_tx(hci_connection_t * conn); 3581 3582 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3583 log_debug("SCO TX Timeout"); 3584 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3585 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3586 if (!conn) return; 3587 3588 // trigger send 3589 conn->sco_tx_ready = 1; 3590 // extra packet if CVSD but SCO buffer is too short 3591 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3592 conn->sco_tx_ready++; 3593 } 3594 hci_notify_if_sco_can_send_now(); 3595 } 3596 3597 3598 #define SCO_TX_AFTER_RX_MS (6) 3599 3600 static void sco_schedule_tx(hci_connection_t * conn){ 3601 3602 uint32_t now = btstack_run_loop_get_time_ms(); 3603 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3604 int time_delta_ms = sco_tx_ms - now; 3605 3606 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3607 3608 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3609 btstack_run_loop_remove_timer(timer); 3610 btstack_run_loop_set_timer(timer, time_delta_ms); 3611 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3612 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3613 btstack_run_loop_add_timer(timer); 3614 } 3615 #endif 3616 3617 static void sco_handler(uint8_t * packet, uint16_t size){ 3618 // lookup connection struct 3619 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3620 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3621 if (!conn) return; 3622 3623 #ifdef ENABLE_SCO_OVER_HCI 3624 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3625 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3626 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3627 packet[2] = 0x3c; 3628 memmove(&packet[3], &packet[23], 63); 3629 size = 63; 3630 } 3631 } 3632 3633 if (hci_have_usb_transport()){ 3634 // Nothing to do 3635 } else { 3636 // 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); 3637 if (hci_stack->synchronous_flow_control_enabled == 0){ 3638 uint32_t now = btstack_run_loop_get_time_ms(); 3639 3640 if (!conn->sco_rx_valid){ 3641 // ignore first 10 packets 3642 conn->sco_rx_count++; 3643 // log_debug("sco rx count %u", conn->sco_rx_count); 3644 if (conn->sco_rx_count == 10) { 3645 // use first timestamp as is and pretent it just started 3646 conn->sco_rx_ms = now; 3647 conn->sco_rx_valid = 1; 3648 conn->sco_rx_count = 0; 3649 sco_schedule_tx(conn); 3650 } 3651 } else { 3652 // track expected arrival timme 3653 conn->sco_rx_count++; 3654 conn->sco_rx_ms += 7; 3655 int delta = (int32_t) (now - conn->sco_rx_ms); 3656 if (delta > 0){ 3657 conn->sco_rx_ms++; 3658 } 3659 // log_debug("sco rx %u", conn->sco_rx_ms); 3660 sco_schedule_tx(conn); 3661 } 3662 } 3663 } 3664 #endif 3665 3666 // deliver to app 3667 if (hci_stack->sco_packet_handler) { 3668 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3669 } 3670 3671 #ifdef HAVE_SCO_TRANSPORT 3672 // We can send one packet for each received packet 3673 conn->sco_tx_ready++; 3674 hci_notify_if_sco_can_send_now(); 3675 #endif 3676 3677 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3678 conn->num_packets_completed++; 3679 hci_stack->host_completed_packets = 1; 3680 hci_run(); 3681 #endif 3682 } 3683 #endif 3684 3685 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3686 hci_dump_packet(packet_type, 1, packet, size); 3687 switch (packet_type) { 3688 case HCI_EVENT_PACKET: 3689 event_handler(packet, size); 3690 break; 3691 case HCI_ACL_DATA_PACKET: 3692 acl_handler(packet, size); 3693 break; 3694 #ifdef ENABLE_CLASSIC 3695 case HCI_SCO_DATA_PACKET: 3696 sco_handler(packet, size); 3697 break; 3698 #endif 3699 default: 3700 break; 3701 } 3702 } 3703 3704 /** 3705 * @brief Add event packet handler. 3706 */ 3707 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3708 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3709 } 3710 3711 /** 3712 * @brief Remove event packet handler. 3713 */ 3714 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3715 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3716 } 3717 3718 /** Register HCI packet handlers */ 3719 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3720 hci_stack->acl_packet_handler = handler; 3721 } 3722 3723 #ifdef ENABLE_CLASSIC 3724 /** 3725 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3726 */ 3727 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3728 hci_stack->sco_packet_handler = handler; 3729 } 3730 #endif 3731 3732 static void hci_state_reset(void){ 3733 // no connections yet 3734 hci_stack->connections = NULL; 3735 3736 // keep discoverable/connectable as this has been requested by the client(s) 3737 // hci_stack->discoverable = 0; 3738 // hci_stack->connectable = 0; 3739 // hci_stack->bondable = 1; 3740 // hci_stack->own_addr_type = 0; 3741 3742 // buffer is free 3743 hci_stack->hci_packet_buffer_reserved = false; 3744 3745 // no pending cmds 3746 hci_stack->decline_reason = 0; 3747 3748 hci_stack->secure_connections_active = false; 3749 3750 #ifdef ENABLE_CLASSIC 3751 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3752 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3753 3754 hci_stack->gap_tasks_classic = 3755 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3756 GAP_TASK_SET_CLASS_OF_DEVICE | 3757 GAP_TASK_SET_LOCAL_NAME | 3758 GAP_TASK_SET_EIR_DATA | 3759 GAP_TASK_WRITE_SCAN_ENABLE | 3760 GAP_TASK_WRITE_PAGE_TIMEOUT; 3761 #endif 3762 3763 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3764 hci_stack->classic_read_local_oob_data = false; 3765 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3766 #endif 3767 3768 // LE 3769 #ifdef ENABLE_BLE 3770 memset(hci_stack->le_random_address, 0, 6); 3771 hci_stack->le_random_address_set = 0; 3772 #endif 3773 #ifdef ENABLE_LE_CENTRAL 3774 hci_stack->le_scanning_active = false; 3775 hci_stack->le_scanning_param_update = true; 3776 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3777 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3778 hci_stack->le_whitelist_capacity = 0; 3779 #endif 3780 #ifdef ENABLE_LE_PERIPHERAL 3781 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3782 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3783 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3784 } 3785 if (hci_stack->le_advertisements_data != NULL){ 3786 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3787 } 3788 #endif 3789 } 3790 3791 #ifdef ENABLE_CLASSIC 3792 /** 3793 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3794 */ 3795 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3796 // store and open remote device db 3797 hci_stack->link_key_db = link_key_db; 3798 if (hci_stack->link_key_db) { 3799 hci_stack->link_key_db->open(); 3800 } 3801 } 3802 #endif 3803 3804 void hci_init(const hci_transport_t *transport, const void *config){ 3805 3806 #ifdef HAVE_MALLOC 3807 if (!hci_stack) { 3808 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3809 } 3810 #else 3811 hci_stack = &hci_stack_static; 3812 #endif 3813 memset(hci_stack, 0, sizeof(hci_stack_t)); 3814 3815 // reference to use transport layer implementation 3816 hci_stack->hci_transport = transport; 3817 3818 // reference to used config 3819 hci_stack->config = config; 3820 3821 // setup pointer for outgoing packet buffer 3822 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3823 3824 // max acl payload size defined in config.h 3825 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3826 3827 // register packet handlers with transport 3828 transport->register_packet_handler(&packet_handler); 3829 3830 hci_stack->state = HCI_STATE_OFF; 3831 3832 // class of device 3833 hci_stack->class_of_device = 0x007a020c; // Smartphone 3834 3835 // bondable by default 3836 hci_stack->bondable = 1; 3837 3838 #ifdef ENABLE_CLASSIC 3839 // classic name 3840 hci_stack->local_name = default_classic_name; 3841 3842 // Master slave policy 3843 hci_stack->master_slave_policy = 1; 3844 3845 // Allow Role Switch 3846 hci_stack->allow_role_switch = 1; 3847 3848 // Default / minimum security level = 2 3849 hci_stack->gap_security_level = LEVEL_2; 3850 3851 // Default Security Mode 4 3852 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3853 3854 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3855 hci_stack->gap_required_encyrption_key_size = 7; 3856 3857 // Link Supervision Timeout 3858 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3859 3860 #endif 3861 3862 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3863 hci_stack->ssp_enable = 1; 3864 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3865 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3866 hci_stack->ssp_auto_accept = 1; 3867 3868 // Secure Connections: enable (requires support from Controller) 3869 hci_stack->secure_connections_enable = true; 3870 3871 // voice setting - signed 16 bit pcm data with CVSD over the air 3872 hci_stack->sco_voice_setting = 0x60; 3873 3874 #ifdef ENABLE_LE_CENTRAL 3875 // connection parameter to use for outgoing connections 3876 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3877 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3878 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3879 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3880 hci_stack->le_connection_latency = 4; // 4 3881 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3882 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3883 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3884 3885 // default LE Scanning 3886 hci_stack->le_scan_type = 0x1; // active 3887 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3888 hci_stack->le_scan_window = 0x30; // 30 ms 3889 #endif 3890 3891 #ifdef ENABLE_LE_PERIPHERAL 3892 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3893 #endif 3894 3895 // connection parameter range used to answer connection parameter update requests in l2cap 3896 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3897 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3898 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3899 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3900 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3901 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3902 3903 hci_state_reset(); 3904 } 3905 3906 void hci_deinit(void){ 3907 btstack_run_loop_remove_timer(&hci_stack->timeout); 3908 #ifdef HAVE_MALLOC 3909 if (hci_stack) { 3910 free(hci_stack); 3911 } 3912 #endif 3913 hci_stack = NULL; 3914 3915 #ifdef ENABLE_CLASSIC 3916 disable_l2cap_timeouts = 0; 3917 #endif 3918 } 3919 3920 /** 3921 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3922 */ 3923 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3924 hci_stack->chipset = chipset_driver; 3925 3926 // reset chipset driver - init is also called on power_up 3927 if (hci_stack->chipset && hci_stack->chipset->init){ 3928 hci_stack->chipset->init(hci_stack->config); 3929 } 3930 } 3931 3932 /** 3933 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3934 */ 3935 void hci_set_control(const btstack_control_t *hardware_control){ 3936 // references to used control implementation 3937 hci_stack->control = hardware_control; 3938 // init with transport config 3939 hardware_control->init(hci_stack->config); 3940 } 3941 3942 static void hci_discard_connections(void){ 3943 btstack_linked_list_iterator_t lit; 3944 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3945 while (btstack_linked_list_iterator_has_next(&lit)){ 3946 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3947 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3948 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3949 hci_shutdown_connection(connection); 3950 } 3951 } 3952 3953 void hci_close(void){ 3954 3955 #ifdef ENABLE_CLASSIC 3956 // close remote device db 3957 if (hci_stack->link_key_db) { 3958 hci_stack->link_key_db->close(); 3959 } 3960 #endif 3961 3962 hci_discard_connections(); 3963 3964 hci_power_control(HCI_POWER_OFF); 3965 3966 #ifdef HAVE_MALLOC 3967 free(hci_stack); 3968 #endif 3969 hci_stack = NULL; 3970 } 3971 3972 #ifdef HAVE_SCO_TRANSPORT 3973 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3974 hci_stack->sco_transport = sco_transport; 3975 sco_transport->register_packet_handler(&packet_handler); 3976 } 3977 #endif 3978 3979 #ifdef ENABLE_CLASSIC 3980 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3981 // validate ranage and set 3982 if (encryption_key_size < 7) return; 3983 if (encryption_key_size > 16) return; 3984 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3985 } 3986 3987 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3988 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3989 hci_stack->gap_security_mode = security_mode; 3990 return ERROR_CODE_SUCCESS; 3991 } else { 3992 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3993 } 3994 } 3995 3996 gap_security_mode_t gap_get_security_mode(void){ 3997 return hci_stack->gap_security_mode; 3998 } 3999 4000 void gap_set_security_level(gap_security_level_t security_level){ 4001 hci_stack->gap_security_level = security_level; 4002 } 4003 4004 gap_security_level_t gap_get_security_level(void){ 4005 if (hci_stack->gap_secure_connections_only_mode){ 4006 return LEVEL_4; 4007 } 4008 return hci_stack->gap_security_level; 4009 } 4010 4011 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4012 hci_stack->gap_minimal_service_security_level = security_level; 4013 } 4014 4015 void gap_set_secure_connections_only_mode(bool enable){ 4016 hci_stack->gap_secure_connections_only_mode = enable; 4017 } 4018 4019 bool gap_get_secure_connections_only_mode(void){ 4020 return hci_stack->gap_secure_connections_only_mode; 4021 } 4022 #endif 4023 4024 #ifdef ENABLE_CLASSIC 4025 void gap_set_class_of_device(uint32_t class_of_device){ 4026 hci_stack->class_of_device = class_of_device; 4027 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4028 hci_run(); 4029 } 4030 4031 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4032 hci_stack->default_link_policy_settings = default_link_policy_settings; 4033 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4034 hci_run(); 4035 } 4036 4037 void gap_set_allow_role_switch(bool allow_role_switch){ 4038 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4039 } 4040 4041 uint8_t hci_get_allow_role_switch(void){ 4042 return hci_stack->allow_role_switch; 4043 } 4044 4045 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4046 hci_stack->link_supervision_timeout = link_supervision_timeout; 4047 } 4048 4049 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4050 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4051 } 4052 4053 uint16_t hci_automatic_flush_timeout(void){ 4054 return hci_stack->automatic_flush_timeout; 4055 } 4056 4057 void hci_disable_l2cap_timeout_check(void){ 4058 disable_l2cap_timeouts = 1; 4059 } 4060 #endif 4061 4062 #ifndef HAVE_HOST_CONTROLLER_API 4063 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4064 void hci_set_bd_addr(bd_addr_t addr){ 4065 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4066 hci_stack->custom_bd_addr_set = 1; 4067 } 4068 #endif 4069 4070 // State-Module-Driver overview 4071 // state module low-level 4072 // HCI_STATE_OFF off close 4073 // HCI_STATE_INITIALIZING, on open 4074 // HCI_STATE_WORKING, on open 4075 // HCI_STATE_HALTING, on open 4076 // HCI_STATE_SLEEPING, off/sleep close 4077 // HCI_STATE_FALLING_ASLEEP on open 4078 4079 static int hci_power_control_on(void){ 4080 4081 // power on 4082 int err = 0; 4083 if (hci_stack->control && hci_stack->control->on){ 4084 err = (*hci_stack->control->on)(); 4085 } 4086 if (err){ 4087 log_error( "POWER_ON failed"); 4088 hci_emit_hci_open_failed(); 4089 return err; 4090 } 4091 4092 // int chipset driver 4093 if (hci_stack->chipset && hci_stack->chipset->init){ 4094 hci_stack->chipset->init(hci_stack->config); 4095 } 4096 4097 // init transport 4098 if (hci_stack->hci_transport->init){ 4099 hci_stack->hci_transport->init(hci_stack->config); 4100 } 4101 4102 // open transport 4103 err = hci_stack->hci_transport->open(); 4104 if (err){ 4105 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4106 if (hci_stack->control && hci_stack->control->off){ 4107 (*hci_stack->control->off)(); 4108 } 4109 hci_emit_hci_open_failed(); 4110 return err; 4111 } 4112 return 0; 4113 } 4114 4115 static void hci_power_control_off(void){ 4116 4117 log_info("hci_power_control_off"); 4118 4119 // close low-level device 4120 hci_stack->hci_transport->close(); 4121 4122 log_info("hci_power_control_off - hci_transport closed"); 4123 4124 // power off 4125 if (hci_stack->control && hci_stack->control->off){ 4126 (*hci_stack->control->off)(); 4127 } 4128 4129 log_info("hci_power_control_off - control closed"); 4130 4131 hci_stack->state = HCI_STATE_OFF; 4132 } 4133 4134 static void hci_power_control_sleep(void){ 4135 4136 log_info("hci_power_control_sleep"); 4137 4138 #if 0 4139 // don't close serial port during sleep 4140 4141 // close low-level device 4142 hci_stack->hci_transport->close(hci_stack->config); 4143 #endif 4144 4145 // sleep mode 4146 if (hci_stack->control && hci_stack->control->sleep){ 4147 (*hci_stack->control->sleep)(); 4148 } 4149 4150 hci_stack->state = HCI_STATE_SLEEPING; 4151 } 4152 4153 static int hci_power_control_wake(void){ 4154 4155 log_info("hci_power_control_wake"); 4156 4157 // wake on 4158 if (hci_stack->control && hci_stack->control->wake){ 4159 (*hci_stack->control->wake)(); 4160 } 4161 4162 #if 0 4163 // open low-level device 4164 int err = hci_stack->hci_transport->open(hci_stack->config); 4165 if (err){ 4166 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4167 if (hci_stack->control && hci_stack->control->off){ 4168 (*hci_stack->control->off)(); 4169 } 4170 hci_emit_hci_open_failed(); 4171 return err; 4172 } 4173 #endif 4174 4175 return 0; 4176 } 4177 4178 static void hci_power_enter_initializing_state(void){ 4179 // set up state machine 4180 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4181 hci_stack->hci_packet_buffer_reserved = false; 4182 hci_stack->state = HCI_STATE_INITIALIZING; 4183 hci_stack->substate = HCI_INIT_SEND_RESET; 4184 } 4185 4186 static void hci_power_enter_halting_state(void){ 4187 #ifdef ENABLE_BLE 4188 hci_whitelist_free(); 4189 #endif 4190 // see hci_run 4191 hci_stack->state = HCI_STATE_HALTING; 4192 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4193 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4194 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4195 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4196 btstack_run_loop_add_timer(&hci_stack->timeout); 4197 } 4198 4199 // returns error 4200 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4201 int err; 4202 switch (power_mode){ 4203 case HCI_POWER_ON: 4204 err = hci_power_control_on(); 4205 if (err != 0) { 4206 log_error("hci_power_control_on() error %d", err); 4207 return err; 4208 } 4209 hci_power_enter_initializing_state(); 4210 break; 4211 case HCI_POWER_OFF: 4212 // do nothing 4213 break; 4214 case HCI_POWER_SLEEP: 4215 // do nothing (with SLEEP == OFF) 4216 break; 4217 default: 4218 btstack_assert(false); 4219 break; 4220 } 4221 return ERROR_CODE_SUCCESS; 4222 } 4223 4224 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4225 switch (power_mode){ 4226 case HCI_POWER_ON: 4227 // do nothing 4228 break; 4229 case HCI_POWER_OFF: 4230 // no connections yet, just turn it off 4231 hci_power_control_off(); 4232 break; 4233 case HCI_POWER_SLEEP: 4234 // no connections yet, just turn it off 4235 hci_power_control_sleep(); 4236 break; 4237 default: 4238 btstack_assert(false); 4239 break; 4240 } 4241 return ERROR_CODE_SUCCESS; 4242 } 4243 4244 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4245 switch (power_mode){ 4246 case HCI_POWER_ON: 4247 // do nothing 4248 break; 4249 case HCI_POWER_OFF: 4250 hci_power_enter_halting_state(); 4251 break; 4252 case HCI_POWER_SLEEP: 4253 // see hci_run 4254 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4255 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4256 break; 4257 default: 4258 btstack_assert(false); 4259 break; 4260 } 4261 return ERROR_CODE_SUCCESS; 4262 } 4263 4264 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4265 switch (power_mode){ 4266 case HCI_POWER_ON: 4267 hci_power_enter_initializing_state(); 4268 break; 4269 case HCI_POWER_OFF: 4270 // do nothing 4271 break; 4272 case HCI_POWER_SLEEP: 4273 // see hci_run 4274 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4275 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4276 break; 4277 default: 4278 btstack_assert(false); 4279 break; 4280 } 4281 return ERROR_CODE_SUCCESS; 4282 } 4283 4284 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4285 switch (power_mode){ 4286 case HCI_POWER_ON: 4287 hci_power_enter_initializing_state(); 4288 break; 4289 case HCI_POWER_OFF: 4290 hci_power_enter_halting_state(); 4291 break; 4292 case HCI_POWER_SLEEP: 4293 // do nothing 4294 break; 4295 default: 4296 btstack_assert(false); 4297 break; 4298 } 4299 return ERROR_CODE_SUCCESS; 4300 } 4301 4302 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4303 int err; 4304 switch (power_mode){ 4305 case HCI_POWER_ON: 4306 err = hci_power_control_wake(); 4307 if (err) return err; 4308 hci_power_enter_initializing_state(); 4309 break; 4310 case HCI_POWER_OFF: 4311 hci_power_enter_halting_state(); 4312 break; 4313 case HCI_POWER_SLEEP: 4314 // do nothing 4315 break; 4316 default: 4317 btstack_assert(false); 4318 break; 4319 } 4320 return ERROR_CODE_SUCCESS; 4321 } 4322 4323 int hci_power_control(HCI_POWER_MODE power_mode){ 4324 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4325 int err = 0; 4326 switch (hci_stack->state){ 4327 case HCI_STATE_OFF: 4328 err = hci_power_control_state_off(power_mode); 4329 break; 4330 case HCI_STATE_INITIALIZING: 4331 err = hci_power_control_state_initializing(power_mode); 4332 break; 4333 case HCI_STATE_WORKING: 4334 err = hci_power_control_state_working(power_mode); 4335 break; 4336 case HCI_STATE_HALTING: 4337 err = hci_power_control_state_halting(power_mode); 4338 break; 4339 case HCI_STATE_FALLING_ASLEEP: 4340 err = hci_power_control_state_falling_asleep(power_mode); 4341 break; 4342 case HCI_STATE_SLEEPING: 4343 err = hci_power_control_state_sleeping(power_mode); 4344 break; 4345 default: 4346 btstack_assert(false); 4347 break; 4348 } 4349 if (err != 0){ 4350 return err; 4351 } 4352 4353 // create internal event 4354 hci_emit_state(); 4355 4356 // trigger next/first action 4357 hci_run(); 4358 4359 return 0; 4360 } 4361 4362 4363 static void hci_halting_run(void) { 4364 4365 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4366 4367 hci_connection_t *connection; 4368 #ifdef ENABLE_BLE 4369 #ifdef ENABLE_LE_PERIPHERAL 4370 bool stop_advertismenets; 4371 #endif 4372 #endif 4373 4374 switch (hci_stack->substate) { 4375 case HCI_HALTING_CLASSIC_STOP: 4376 #ifdef ENABLE_CLASSIC 4377 if (!hci_can_send_command_packet_now()) return; 4378 4379 if (hci_stack->connectable || hci_stack->discoverable){ 4380 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4381 hci_send_cmd(&hci_write_scan_enable, 0); 4382 return; 4383 } 4384 #endif 4385 /* fall through */ 4386 4387 case HCI_HALTING_LE_ADV_STOP: 4388 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4389 4390 #ifdef ENABLE_BLE 4391 #ifdef ENABLE_LE_PERIPHERAL 4392 if (!hci_can_send_command_packet_now()) return; 4393 4394 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4395 4396 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4397 if (hci_extended_advertising_supported()){ 4398 btstack_linked_list_iterator_t it; 4399 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4400 // stop all periodic advertisements and check if an extended set is active 4401 while (btstack_linked_list_iterator_has_next(&it)){ 4402 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4403 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4404 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4405 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4406 return; 4407 } 4408 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4409 stop_advertismenets = true; 4410 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4411 } 4412 } 4413 if (stop_advertismenets){ 4414 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4415 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4416 return; 4417 } 4418 } 4419 else 4420 #else 4421 { 4422 if (stop_advertismenets) { 4423 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4424 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4425 return; 4426 } 4427 } 4428 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4429 #endif /* ENABLE_LE_PERIPHERAL */ 4430 #endif /* ENABLE_BLE */ 4431 4432 /* fall through */ 4433 4434 case HCI_HALTING_LE_SCAN_STOP: 4435 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4436 if (!hci_can_send_command_packet_now()) return; 4437 4438 #ifdef ENABLE_BLE 4439 #ifdef ENABLE_LE_CENTRAL 4440 if (hci_stack->le_scanning_active){ 4441 hci_le_scan_stop(); 4442 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4443 return; 4444 } 4445 #endif 4446 #endif 4447 4448 /* fall through */ 4449 4450 case HCI_HALTING_DISCONNECT_ALL: 4451 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4452 if (!hci_can_send_command_packet_now()) return; 4453 4454 // close all open connections 4455 connection = (hci_connection_t *) hci_stack->connections; 4456 if (connection) { 4457 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4458 4459 // check state 4460 if (connection->state == SENT_DISCONNECT) return; 4461 connection->state = SENT_DISCONNECT; 4462 4463 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4464 4465 // finally, send the disconnect command 4466 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4467 return; 4468 } 4469 4470 btstack_run_loop_remove_timer(&hci_stack->timeout); 4471 4472 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4473 4474 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4475 log_info("HCI_STATE_HALTING: wait 50 ms"); 4476 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4477 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4478 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4479 btstack_run_loop_add_timer(&hci_stack->timeout); 4480 break; 4481 4482 case HCI_HALTING_CLOSE: 4483 // close left over connections (that had not been properly closed before) 4484 hci_discard_connections(); 4485 4486 log_info("HCI_STATE_HALTING, calling off"); 4487 4488 // switch mode 4489 hci_power_control_off(); 4490 4491 log_info("HCI_STATE_HALTING, emitting state"); 4492 hci_emit_state(); 4493 log_info("HCI_STATE_HALTING, done"); 4494 break; 4495 4496 case HCI_HALTING_W4_CLOSE_TIMER: 4497 // keep waiting 4498 4499 break; 4500 default: 4501 break; 4502 } 4503 }; 4504 4505 static void hci_falling_asleep_run(void){ 4506 hci_connection_t * connection; 4507 switch(hci_stack->substate) { 4508 case HCI_FALLING_ASLEEP_DISCONNECT: 4509 log_info("HCI_STATE_FALLING_ASLEEP"); 4510 // close all open connections 4511 connection = (hci_connection_t *) hci_stack->connections; 4512 if (connection){ 4513 4514 // send disconnect 4515 if (!hci_can_send_command_packet_now()) return; 4516 4517 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4518 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4519 4520 // send disconnected event right away - causes higher layer connections to get closed, too. 4521 hci_shutdown_connection(connection); 4522 return; 4523 } 4524 4525 if (hci_classic_supported()){ 4526 // disable page and inquiry scan 4527 if (!hci_can_send_command_packet_now()) return; 4528 4529 log_info("HCI_STATE_HALTING, disabling inq scans"); 4530 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4531 4532 // continue in next sub state 4533 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4534 break; 4535 } 4536 4537 /* fall through */ 4538 4539 case HCI_FALLING_ASLEEP_COMPLETE: 4540 log_info("HCI_STATE_HALTING, calling sleep"); 4541 // switch mode 4542 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4543 hci_emit_state(); 4544 break; 4545 4546 default: 4547 break; 4548 } 4549 } 4550 4551 #ifdef ENABLE_CLASSIC 4552 4553 static void hci_update_scan_enable(void){ 4554 // 2 = page scan, 1 = inq scan 4555 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4556 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4557 hci_run(); 4558 } 4559 4560 void gap_discoverable_control(uint8_t enable){ 4561 if (enable) enable = 1; // normalize argument 4562 4563 if (hci_stack->discoverable == enable){ 4564 hci_emit_discoverable_enabled(hci_stack->discoverable); 4565 return; 4566 } 4567 4568 hci_stack->discoverable = enable; 4569 hci_update_scan_enable(); 4570 } 4571 4572 void gap_connectable_control(uint8_t enable){ 4573 if (enable) enable = 1; // normalize argument 4574 4575 // don't emit event 4576 if (hci_stack->connectable == enable) return; 4577 4578 hci_stack->connectable = enable; 4579 hci_update_scan_enable(); 4580 } 4581 #endif 4582 4583 void gap_local_bd_addr(bd_addr_t address_buffer){ 4584 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4585 } 4586 4587 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4588 static void hci_host_num_completed_packets(void){ 4589 4590 // create packet manually as arrays are not supported and num_commands should not get reduced 4591 hci_reserve_packet_buffer(); 4592 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4593 4594 uint16_t size = 0; 4595 uint16_t num_handles = 0; 4596 packet[size++] = 0x35; 4597 packet[size++] = 0x0c; 4598 size++; // skip param len 4599 size++; // skip num handles 4600 4601 // add { handle, packets } entries 4602 btstack_linked_item_t * it; 4603 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4604 hci_connection_t * connection = (hci_connection_t *) it; 4605 if (connection->num_packets_completed){ 4606 little_endian_store_16(packet, size, connection->con_handle); 4607 size += 2; 4608 little_endian_store_16(packet, size, connection->num_packets_completed); 4609 size += 2; 4610 // 4611 num_handles++; 4612 connection->num_packets_completed = 0; 4613 } 4614 } 4615 4616 packet[2] = size - 3; 4617 packet[3] = num_handles; 4618 4619 hci_stack->host_completed_packets = 0; 4620 4621 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4622 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4623 4624 // release packet buffer for synchronous transport implementations 4625 if (hci_transport_synchronous()){ 4626 hci_release_packet_buffer(); 4627 hci_emit_transport_packet_sent(); 4628 } 4629 } 4630 #endif 4631 4632 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4633 UNUSED(ds); 4634 hci_stack->substate = HCI_HALTING_CLOSE; 4635 // allow packet handlers to defer final shutdown 4636 hci_emit_state(); 4637 hci_run(); 4638 } 4639 4640 static bool hci_run_acl_fragments(void){ 4641 if (hci_stack->acl_fragmentation_total_size > 0u) { 4642 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4643 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4644 if (connection) { 4645 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4646 hci_send_acl_packet_fragments(connection); 4647 return true; 4648 } 4649 } else { 4650 // connection gone -> discard further fragments 4651 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4652 hci_stack->acl_fragmentation_total_size = 0; 4653 hci_stack->acl_fragmentation_pos = 0; 4654 } 4655 } 4656 return false; 4657 } 4658 4659 #ifdef ENABLE_CLASSIC 4660 4661 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4662 static bool hci_classic_operation_active(void) { 4663 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4664 return true; 4665 } 4666 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4667 return true; 4668 } 4669 btstack_linked_item_t * it; 4670 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4671 hci_connection_t *connection = (hci_connection_t *) it; 4672 switch (connection->state) { 4673 case SENT_CREATE_CONNECTION: 4674 case SENT_CANCEL_CONNECTION: 4675 case SENT_DISCONNECT: 4676 return true; 4677 default: 4678 break; 4679 } 4680 } 4681 return false; 4682 } 4683 #endif 4684 4685 static bool hci_run_general_gap_classic(void){ 4686 4687 // assert stack is working and classic is active 4688 if (hci_classic_supported() == false) return false; 4689 if (hci_stack->state != HCI_STATE_WORKING) return false; 4690 4691 // decline incoming connections 4692 if (hci_stack->decline_reason){ 4693 uint8_t reason = hci_stack->decline_reason; 4694 hci_stack->decline_reason = 0; 4695 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4696 return true; 4697 } 4698 4699 if (hci_stack->gap_tasks_classic != 0){ 4700 hci_run_gap_tasks_classic(); 4701 return true; 4702 } 4703 4704 // start/stop inquiry 4705 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4706 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4707 if (hci_classic_operation_active() == false) 4708 #endif 4709 { 4710 uint8_t duration = hci_stack->inquiry_state; 4711 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4712 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4713 return true; 4714 } 4715 } 4716 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4717 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4718 hci_send_cmd(&hci_inquiry_cancel); 4719 return true; 4720 } 4721 // remote name request 4722 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4723 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4724 if (hci_classic_operation_active() == false) 4725 #endif 4726 { 4727 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4728 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4729 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4730 return true; 4731 } 4732 } 4733 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4734 // Local OOB data 4735 if (hci_stack->classic_read_local_oob_data){ 4736 hci_stack->classic_read_local_oob_data = false; 4737 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4738 hci_send_cmd(&hci_read_local_extended_oob_data); 4739 } else { 4740 hci_send_cmd(&hci_read_local_oob_data); 4741 } 4742 } 4743 #endif 4744 // pairing 4745 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4746 uint8_t state = hci_stack->gap_pairing_state; 4747 uint8_t pin_code[16]; 4748 switch (state){ 4749 case GAP_PAIRING_STATE_SEND_PIN: 4750 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4751 memset(pin_code, 0, 16); 4752 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4753 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4754 break; 4755 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4756 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4757 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4758 break; 4759 case GAP_PAIRING_STATE_SEND_PASSKEY: 4760 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4761 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4762 break; 4763 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4764 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4765 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4766 break; 4767 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4768 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4769 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4770 break; 4771 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4772 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4773 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4774 break; 4775 default: 4776 break; 4777 } 4778 return true; 4779 } 4780 return false; 4781 } 4782 #endif 4783 4784 #ifdef ENABLE_BLE 4785 4786 #ifdef ENABLE_LE_CENTRAL 4787 static void hci_le_scan_stop(void){ 4788 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4789 if (hci_extended_advertising_supported()) { 4790 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4791 } else 4792 #endif 4793 { 4794 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4795 } 4796 } 4797 #endif 4798 4799 #ifdef ENABLE_LE_PERIPHERAL 4800 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4801 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4802 uint8_t operation = 0; 4803 if (pos == 0){ 4804 // first fragment or complete data 4805 operation |= 1; 4806 } 4807 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4808 // last fragment or complete data 4809 operation |= 2; 4810 } 4811 return operation; 4812 } 4813 #endif 4814 #endif 4815 4816 static bool hci_run_general_gap_le(void){ 4817 4818 // Phase 1: collect what to stop 4819 4820 bool scanning_stop = false; 4821 bool connecting_stop = false; 4822 bool advertising_stop = false; 4823 4824 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4825 le_advertising_set_t * advertising_stop_set = NULL; 4826 bool periodic_stop = false; 4827 #endif 4828 4829 #ifndef ENABLE_LE_CENTRAL 4830 UNUSED(scanning_stop); 4831 UNUSED(connecting_stop); 4832 #endif 4833 #ifndef ENABLE_LE_PERIPHERAL 4834 UNUSED(advertising_stop); 4835 #endif 4836 4837 // check if own address changes 4838 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4839 4840 // check if whitelist needs modification 4841 bool whitelist_modification_pending = false; 4842 btstack_linked_list_iterator_t lit; 4843 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4844 while (btstack_linked_list_iterator_has_next(&lit)){ 4845 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4846 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4847 whitelist_modification_pending = true; 4848 break; 4849 } 4850 } 4851 // check if resolving list needs modification 4852 bool resolving_list_modification_pending = false; 4853 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4854 4855 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4856 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4857 resolving_list_modification_pending = true; 4858 } 4859 #endif 4860 4861 #ifdef ENABLE_LE_CENTRAL 4862 // scanning control 4863 if (hci_stack->le_scanning_active) { 4864 // stop if: 4865 // - parameter change required 4866 // - it's disabled 4867 // - whitelist change required but used for scanning 4868 // - resolving list modified 4869 // - own address changes 4870 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4871 if ((hci_stack->le_scanning_param_update) || 4872 !hci_stack->le_scanning_enabled || 4873 (scanning_uses_whitelist && whitelist_modification_pending) || 4874 resolving_list_modification_pending || 4875 random_address_change){ 4876 4877 scanning_stop = true; 4878 } 4879 } 4880 #endif 4881 4882 #ifdef ENABLE_LE_CENTRAL 4883 // connecting control 4884 bool connecting_with_whitelist; 4885 switch (hci_stack->le_connecting_state){ 4886 case LE_CONNECTING_DIRECT: 4887 case LE_CONNECTING_WHITELIST: 4888 // stop connecting if: 4889 // - connecting uses white and whitelist modification pending 4890 // - if it got disabled 4891 // - resolving list modified 4892 // - own address changes 4893 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4894 if ((connecting_with_whitelist && whitelist_modification_pending) || 4895 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4896 resolving_list_modification_pending || 4897 random_address_change) { 4898 4899 connecting_stop = true; 4900 } 4901 break; 4902 default: 4903 break; 4904 } 4905 #endif 4906 4907 #ifdef ENABLE_LE_PERIPHERAL 4908 // le advertisement control 4909 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4910 // stop if: 4911 // - parameter change required 4912 // - random address used in advertising and changes 4913 // - it's disabled 4914 // - whitelist change required but used for advertisement filter policy 4915 // - resolving list modified 4916 // - own address changes 4917 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4918 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4919 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4920 if (advertising_change || 4921 (advertising_uses_random_address && random_address_change) || 4922 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4923 (advertising_uses_whitelist && whitelist_modification_pending) || 4924 resolving_list_modification_pending || 4925 random_address_change) { 4926 4927 advertising_stop = true; 4928 } 4929 } 4930 4931 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4932 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4933 btstack_linked_list_iterator_t it; 4934 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4935 while (btstack_linked_list_iterator_has_next(&it)){ 4936 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4937 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4938 // stop if: 4939 // - parameter change required 4940 // - random address used in connectable advertising and changes 4941 // - it's disabled 4942 // - whitelist change required but used for advertisement filter policy 4943 // - resolving list modified 4944 // - own address changes 4945 // - advertisement set will be removed 4946 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4947 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4948 bool advertising_uses_random_address = 4949 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 4950 advertising_connectable; 4951 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4952 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4953 bool advertising_set_random_address_change = 4954 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4955 bool advertising_set_will_be_removed = 4956 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4957 if (advertising_parameter_change || 4958 (advertising_uses_random_address && advertising_set_random_address_change) || 4959 (advertising_enabled == false) || 4960 (advertising_uses_whitelist && whitelist_modification_pending) || 4961 resolving_list_modification_pending || 4962 advertising_set_will_be_removed) { 4963 4964 advertising_stop = true; 4965 advertising_stop_set = advertising_set; 4966 break; 4967 } 4968 } 4969 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4970 // stop if: 4971 // - it's disabled 4972 // - parameter change required 4973 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 4974 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 4975 if ((periodic_enabled == false) || periodic_parameter_change){ 4976 periodic_stop = true; 4977 advertising_stop_set = advertising_set; 4978 } 4979 } 4980 } 4981 } 4982 #endif 4983 4984 #endif 4985 4986 4987 // Phase 2: stop everything that should be off during modifications 4988 4989 #ifdef ENABLE_LE_CENTRAL 4990 if (scanning_stop){ 4991 hci_stack->le_scanning_active = false; 4992 hci_le_scan_stop(); 4993 return true; 4994 } 4995 #endif 4996 4997 #ifdef ENABLE_LE_CENTRAL 4998 if (connecting_stop){ 4999 hci_send_cmd(&hci_le_create_connection_cancel); 5000 return true; 5001 } 5002 #endif 5003 5004 #ifdef ENABLE_LE_PERIPHERAL 5005 if (advertising_stop){ 5006 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5007 if (hci_extended_advertising_supported()) { 5008 uint8_t advertising_stop_handle; 5009 if (advertising_stop_set != NULL){ 5010 advertising_stop_handle = advertising_stop_set->advertising_handle; 5011 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5012 } else { 5013 advertising_stop_handle = 0; 5014 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5015 } 5016 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5017 const uint16_t durations[] = { 0 }; 5018 const uint16_t max_events[] = { 0 }; 5019 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5020 } else 5021 #endif 5022 { 5023 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5024 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5025 } 5026 return true; 5027 } 5028 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5029 if (periodic_stop){ 5030 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5031 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5032 return true; 5033 } 5034 #endif 5035 #endif 5036 5037 // Phase 3: modify 5038 5039 if (random_address_change){ 5040 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5041 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5042 if (hci_extended_advertising_supported()) { 5043 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5044 } 5045 #endif 5046 { 5047 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5048 } 5049 return true; 5050 } 5051 5052 #ifdef ENABLE_LE_CENTRAL 5053 if (hci_stack->le_scanning_param_update){ 5054 hci_stack->le_scanning_param_update = false; 5055 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5056 if (hci_extended_advertising_supported()){ 5057 // prepare arrays for all PHYs 5058 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5059 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5060 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5061 uint8_t scanning_phys = 1; // LE 1M PHY 5062 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5063 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5064 } else 5065 #endif 5066 { 5067 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5068 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5069 } 5070 return true; 5071 } 5072 #endif 5073 5074 #ifdef ENABLE_LE_PERIPHERAL 5075 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5076 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5077 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5078 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5079 if (hci_extended_advertising_supported()){ 5080 // map advertisment type to advertising event properties 5081 uint16_t adv_event_properties = 0; 5082 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5083 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5084 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5085 } 5086 hci_stack->le_advertising_set_in_current_command = 0; 5087 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5088 0, 5089 adv_event_properties, 5090 hci_stack->le_advertisements_interval_min, 5091 hci_stack->le_advertisements_interval_max, 5092 hci_stack->le_advertisements_channel_map, 5093 hci_stack->le_advertisements_own_addr_type, 5094 hci_stack->le_advertisements_direct_address_type, 5095 hci_stack->le_advertisements_direct_address, 5096 hci_stack->le_advertisements_filter_policy, 5097 0x7f, // tx power: no preference 5098 0x01, // primary adv phy: LE 1M 5099 0, // secondary adv max skip 5100 0, // secondary adv phy 5101 0, // adv sid 5102 0 // scan request notification 5103 ); 5104 } 5105 #endif 5106 { 5107 hci_send_cmd(&hci_le_set_advertising_parameters, 5108 hci_stack->le_advertisements_interval_min, 5109 hci_stack->le_advertisements_interval_max, 5110 hci_stack->le_advertisements_type, 5111 hci_stack->le_advertisements_own_addr_type, 5112 hci_stack->le_advertisements_direct_address_type, 5113 hci_stack->le_advertisements_direct_address, 5114 hci_stack->le_advertisements_channel_map, 5115 hci_stack->le_advertisements_filter_policy); 5116 } 5117 return true; 5118 } 5119 5120 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5121 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5122 uint8_t adv_data_clean[31]; 5123 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5124 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5125 hci_stack->le_advertisements_data_len); 5126 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5127 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5128 if (hci_extended_advertising_supported()){ 5129 hci_stack->le_advertising_set_in_current_command = 0; 5130 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5131 } else 5132 #endif 5133 { 5134 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5135 } 5136 return true; 5137 } 5138 5139 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5140 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5141 uint8_t scan_data_clean[31]; 5142 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5143 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5144 hci_stack->le_scan_response_data_len); 5145 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5146 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5147 if (hci_extended_advertising_supported()){ 5148 hci_stack->le_advertising_set_in_current_command = 0; 5149 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5150 } else 5151 #endif 5152 { 5153 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5154 } 5155 return true; 5156 } 5157 5158 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5159 if (hci_extended_advertising_supported()) { 5160 btstack_linked_list_iterator_t it; 5161 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5162 while (btstack_linked_list_iterator_has_next(&it)){ 5163 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5164 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5165 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5166 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5167 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5168 return true; 5169 } 5170 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5171 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5172 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5173 return true; 5174 } 5175 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5176 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5177 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5178 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5179 advertising_set->advertising_handle, 5180 advertising_set->extended_params.advertising_event_properties, 5181 advertising_set->extended_params.primary_advertising_interval_min, 5182 advertising_set->extended_params.primary_advertising_interval_max, 5183 advertising_set->extended_params.primary_advertising_channel_map, 5184 advertising_set->extended_params.own_address_type, 5185 advertising_set->extended_params.peer_address_type, 5186 advertising_set->extended_params.peer_address, 5187 advertising_set->extended_params.advertising_filter_policy, 5188 advertising_set->extended_params.advertising_tx_power, 5189 advertising_set->extended_params.primary_advertising_phy, 5190 advertising_set->extended_params.secondary_advertising_max_skip, 5191 advertising_set->extended_params.secondary_advertising_phy, 5192 advertising_set->extended_params.advertising_sid, 5193 advertising_set->extended_params.scan_request_notification_enable 5194 ); 5195 return true; 5196 } 5197 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5198 uint16_t pos = advertising_set->adv_data_pos; 5199 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5200 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5201 if ((operation & 0x02) != 0){ 5202 // last fragment or complete data 5203 operation |= 2; 5204 advertising_set->adv_data_pos = 0; 5205 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5206 } else { 5207 advertising_set->adv_data_pos += data_to_upload; 5208 } 5209 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5210 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5211 return true; 5212 } 5213 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5214 uint16_t pos = advertising_set->scan_data_pos; 5215 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5216 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5217 if ((operation & 0x02) != 0){ 5218 advertising_set->scan_data_pos = 0; 5219 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5220 } else { 5221 advertising_set->scan_data_pos += data_to_upload; 5222 } 5223 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5224 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5225 return true; 5226 } 5227 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5228 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5229 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5230 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5231 advertising_set->advertising_handle, 5232 advertising_set->periodic_params.periodic_advertising_interval_min, 5233 advertising_set->periodic_params.periodic_advertising_interval_max, 5234 advertising_set->periodic_params.periodic_advertising_properties); 5235 return true; 5236 } 5237 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5238 uint16_t pos = advertising_set->periodic_data_pos; 5239 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5240 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5241 if ((operation & 0x02) != 0){ 5242 // last fragment or complete data 5243 operation |= 2; 5244 advertising_set->periodic_data_pos = 0; 5245 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5246 } else { 5247 advertising_set->periodic_data_pos += data_to_upload; 5248 } 5249 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5250 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5251 return true; 5252 } 5253 } 5254 } 5255 #endif 5256 5257 5258 #endif 5259 5260 5261 #ifdef ENABLE_LE_CENTRAL 5262 // if connect with whitelist was active and is not cancelled yet, wait until next time 5263 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5264 #endif 5265 5266 // LE Whitelist Management 5267 if (whitelist_modification_pending){ 5268 // add/remove entries 5269 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5270 while (btstack_linked_list_iterator_has_next(&lit)){ 5271 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5272 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5273 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5274 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5275 return true; 5276 } 5277 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5278 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5279 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5280 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5281 return true; 5282 } 5283 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5284 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5285 btstack_memory_whitelist_entry_free(entry); 5286 } 5287 } 5288 } 5289 5290 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5291 // LE Resolving List Management 5292 if (resolving_list_supported) { 5293 uint16_t i; 5294 switch (hci_stack->le_resolving_list_state) { 5295 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5296 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5297 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5298 return true; 5299 case LE_RESOLVING_LIST_READ_SIZE: 5300 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5301 hci_send_cmd(&hci_le_read_resolving_list_size); 5302 return true; 5303 case LE_RESOLVING_LIST_SEND_CLEAR: 5304 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5305 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5306 sizeof(hci_stack->le_resolving_list_add_entries)); 5307 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5308 sizeof(hci_stack->le_resolving_list_remove_entries)); 5309 hci_send_cmd(&hci_le_clear_resolving_list); 5310 return true; 5311 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5312 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5313 uint8_t offset = i >> 3; 5314 uint8_t mask = 1 << (i & 7); 5315 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5316 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5317 bd_addr_t peer_identity_addreses; 5318 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5319 sm_key_t peer_irk; 5320 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5321 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5322 5323 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5324 // trigger whitelist entry 'update' (work around for controller bug) 5325 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5326 while (btstack_linked_list_iterator_has_next(&lit)) { 5327 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5328 if (entry->address_type != peer_identity_addr_type) continue; 5329 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5330 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5331 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5332 } 5333 #endif 5334 5335 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5336 peer_identity_addreses); 5337 return true; 5338 } 5339 5340 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5341 5342 /* fall through */ 5343 5344 case LE_RESOLVING_LIST_ADD_ENTRIES: 5345 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5346 uint8_t offset = i >> 3; 5347 uint8_t mask = 1 << (i & 7); 5348 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5349 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5350 bd_addr_t peer_identity_addreses; 5351 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5352 sm_key_t peer_irk; 5353 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5354 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5355 const uint8_t *local_irk = gap_get_persistent_irk(); 5356 // command uses format specifier 'P' that stores 16-byte value without flip 5357 uint8_t local_irk_flipped[16]; 5358 uint8_t peer_irk_flipped[16]; 5359 reverse_128(local_irk, local_irk_flipped); 5360 reverse_128(peer_irk, peer_irk_flipped); 5361 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5362 peer_irk_flipped, local_irk_flipped); 5363 return true; 5364 } 5365 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5366 break; 5367 5368 default: 5369 break; 5370 } 5371 } 5372 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5373 #endif 5374 5375 // post-pone all actions until stack is fully working 5376 if (hci_stack->state != HCI_STATE_WORKING) return false; 5377 5378 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5379 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5380 5381 // Phase 4: restore state 5382 5383 #ifdef ENABLE_LE_CENTRAL 5384 // re-start scanning 5385 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5386 hci_stack->le_scanning_active = true; 5387 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5388 if (hci_extended_advertising_supported()){ 5389 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5390 } else 5391 #endif 5392 { 5393 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5394 } 5395 return true; 5396 } 5397 #endif 5398 5399 #ifdef ENABLE_LE_CENTRAL 5400 // re-start connecting 5401 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5402 bd_addr_t null_addr; 5403 memset(null_addr, 0, 6); 5404 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5405 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5406 hci_send_cmd(&hci_le_create_connection, 5407 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5408 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5409 1, // use whitelist 5410 0, // peer address type 5411 null_addr, // peer bd addr 5412 hci_stack->le_connection_own_addr_type, // our addr type: 5413 hci_stack->le_connection_interval_min, // conn interval min 5414 hci_stack->le_connection_interval_max, // conn interval max 5415 hci_stack->le_connection_latency, // conn latency 5416 hci_stack->le_supervision_timeout, // conn latency 5417 hci_stack->le_minimum_ce_length, // min ce length 5418 hci_stack->le_maximum_ce_length // max ce length 5419 ); 5420 return true; 5421 } 5422 #endif 5423 5424 #ifdef ENABLE_LE_PERIPHERAL 5425 // re-start advertising 5426 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5427 // check if advertisements should be enabled given 5428 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5429 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5430 5431 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5432 if (hci_extended_advertising_supported()){ 5433 const uint8_t advertising_handles[] = { 0 }; 5434 const uint16_t durations[] = { 0 }; 5435 const uint16_t max_events[] = { 0 }; 5436 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5437 } else 5438 #endif 5439 { 5440 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5441 } 5442 return true; 5443 } 5444 5445 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5446 if (hci_extended_advertising_supported()) { 5447 btstack_linked_list_iterator_t it; 5448 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5449 while (btstack_linked_list_iterator_has_next(&it)) { 5450 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5451 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5452 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5453 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5454 const uint16_t durations[] = { advertising_set->enable_timeout }; 5455 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5456 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5457 return true; 5458 } 5459 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5460 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5461 uint8_t enable = 1; 5462 if (advertising_set->periodic_include_adi){ 5463 enable |= 2; 5464 } 5465 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5466 return true; 5467 } 5468 } 5469 } 5470 #endif 5471 #endif 5472 5473 return false; 5474 } 5475 #endif 5476 5477 static bool hci_run_general_pending_commands(void){ 5478 btstack_linked_item_t * it; 5479 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5480 hci_connection_t * connection = (hci_connection_t *) it; 5481 5482 switch(connection->state){ 5483 case SEND_CREATE_CONNECTION: 5484 switch(connection->address_type){ 5485 #ifdef ENABLE_CLASSIC 5486 case BD_ADDR_TYPE_ACL: 5487 log_info("sending hci_create_connection"); 5488 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5489 break; 5490 #endif 5491 default: 5492 #ifdef ENABLE_BLE 5493 #ifdef ENABLE_LE_CENTRAL 5494 log_info("sending hci_le_create_connection"); 5495 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5496 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5497 hci_send_cmd(&hci_le_create_connection, 5498 hci_stack->le_connection_scan_interval, // conn scan interval 5499 hci_stack->le_connection_scan_window, // conn scan windows 5500 0, // don't use whitelist 5501 connection->address_type, // peer address type 5502 connection->address, // peer bd addr 5503 hci_stack->le_connection_own_addr_type, // our addr type: 5504 hci_stack->le_connection_interval_min, // conn interval min 5505 hci_stack->le_connection_interval_max, // conn interval max 5506 hci_stack->le_connection_latency, // conn latency 5507 hci_stack->le_supervision_timeout, // conn latency 5508 hci_stack->le_minimum_ce_length, // min ce length 5509 hci_stack->le_maximum_ce_length // max ce length 5510 ); 5511 connection->state = SENT_CREATE_CONNECTION; 5512 #endif 5513 #endif 5514 break; 5515 } 5516 return true; 5517 5518 #ifdef ENABLE_CLASSIC 5519 case RECEIVED_CONNECTION_REQUEST: 5520 connection->role = HCI_ROLE_SLAVE; 5521 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5522 log_info("sending hci_accept_connection_request"); 5523 connection->state = ACCEPTED_CONNECTION_REQUEST; 5524 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5525 return true; 5526 } 5527 break; 5528 #endif 5529 5530 #ifdef ENABLE_BLE 5531 #ifdef ENABLE_LE_CENTRAL 5532 case SEND_CANCEL_CONNECTION: 5533 connection->state = SENT_CANCEL_CONNECTION; 5534 hci_send_cmd(&hci_le_create_connection_cancel); 5535 return true; 5536 #endif 5537 #endif 5538 case SEND_DISCONNECT: 5539 connection->state = SENT_DISCONNECT; 5540 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5541 return true; 5542 5543 default: 5544 break; 5545 } 5546 5547 // no further commands if connection is about to get shut down 5548 if (connection->state == SENT_DISCONNECT) continue; 5549 5550 #ifdef ENABLE_CLASSIC 5551 5552 // Handling link key request requires remote supported features 5553 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5554 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5555 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5556 5557 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5558 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5559 if (have_link_key && security_level_sufficient){ 5560 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5561 } else { 5562 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5563 } 5564 return true; 5565 } 5566 5567 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5568 log_info("denying to pin request"); 5569 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5570 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5571 return true; 5572 } 5573 5574 // security assessment requires remote features 5575 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5576 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5577 hci_ssp_assess_security_on_io_cap_request(connection); 5578 // 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 5579 } 5580 5581 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5582 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5583 // set authentication requirements: 5584 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5585 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5586 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5587 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5588 authreq |= 1; 5589 } 5590 bool bonding = hci_stack->bondable; 5591 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5592 // if we have received IO Cap Response, we're in responder role 5593 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5594 if (bonding && !remote_bonding){ 5595 log_info("Remote not bonding, dropping local flag"); 5596 bonding = false; 5597 } 5598 } 5599 if (bonding){ 5600 if (connection->bonding_flags & BONDING_DEDICATED){ 5601 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5602 } else { 5603 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5604 } 5605 } 5606 uint8_t have_oob_data = 0; 5607 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5608 if (connection->classic_oob_c_192 != NULL){ 5609 have_oob_data |= 1; 5610 } 5611 if (connection->classic_oob_c_256 != NULL){ 5612 have_oob_data |= 2; 5613 } 5614 #endif 5615 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5616 return true; 5617 } 5618 5619 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5620 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5621 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5622 return true; 5623 } 5624 5625 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5626 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5627 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5628 const uint8_t zero[16] = { 0 }; 5629 const uint8_t * r_192 = zero; 5630 const uint8_t * c_192 = zero; 5631 const uint8_t * r_256 = zero; 5632 const uint8_t * c_256 = zero; 5633 // verify P-256 OOB 5634 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5635 c_256 = connection->classic_oob_c_256; 5636 if (connection->classic_oob_r_256 != NULL) { 5637 r_256 = connection->classic_oob_r_256; 5638 } 5639 } 5640 // verify P-192 OOB 5641 if ((connection->classic_oob_c_192 != NULL)) { 5642 c_192 = connection->classic_oob_c_192; 5643 if (connection->classic_oob_r_192 != NULL) { 5644 r_192 = connection->classic_oob_r_192; 5645 } 5646 } 5647 5648 // assess security 5649 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5650 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5651 if (need_level_4 && !can_reach_level_4){ 5652 log_info("Level 4 required, but not possible -> abort"); 5653 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5654 // send oob negative reply 5655 c_256 = NULL; 5656 c_192 = NULL; 5657 } 5658 5659 // Reply 5660 if (c_256 != zero) { 5661 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5662 } else if (c_192 != zero){ 5663 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5664 } else { 5665 hci_stack->classic_oob_con_handle = connection->con_handle; 5666 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5667 } 5668 return true; 5669 } 5670 #endif 5671 5672 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5673 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5674 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5675 return true; 5676 } 5677 5678 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5679 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5680 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5681 return true; 5682 } 5683 5684 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5685 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5686 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5687 return true; 5688 } 5689 5690 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5691 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5692 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5693 connection->state = SENT_DISCONNECT; 5694 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5695 return true; 5696 } 5697 5698 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5699 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5700 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5701 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5702 return true; 5703 } 5704 5705 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5706 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5707 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5708 return true; 5709 } 5710 5711 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5712 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5713 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5714 return true; 5715 } 5716 5717 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5718 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5719 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5720 return true; 5721 } 5722 5723 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5724 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5725 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5726 return true; 5727 } 5728 5729 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5730 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5731 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5732 return true; 5733 } 5734 #endif 5735 5736 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5737 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5738 #ifdef ENABLE_CLASSIC 5739 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5740 #endif 5741 if (connection->state != SENT_DISCONNECT){ 5742 connection->state = SENT_DISCONNECT; 5743 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5744 return true; 5745 } 5746 } 5747 5748 #ifdef ENABLE_CLASSIC 5749 uint16_t sniff_min_interval; 5750 switch (connection->sniff_min_interval){ 5751 case 0: 5752 break; 5753 case 0xffff: 5754 connection->sniff_min_interval = 0; 5755 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5756 return true; 5757 default: 5758 sniff_min_interval = connection->sniff_min_interval; 5759 connection->sniff_min_interval = 0; 5760 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5761 return true; 5762 } 5763 5764 if (connection->sniff_subrating_max_latency != 0xffff){ 5765 uint16_t max_latency = connection->sniff_subrating_max_latency; 5766 connection->sniff_subrating_max_latency = 0; 5767 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5768 return true; 5769 } 5770 5771 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5772 uint8_t service_type = (uint8_t) connection->qos_service_type; 5773 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5774 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); 5775 return true; 5776 } 5777 5778 if (connection->request_role != HCI_ROLE_INVALID){ 5779 hci_role_t role = connection->request_role; 5780 connection->request_role = HCI_ROLE_INVALID; 5781 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5782 return true; 5783 } 5784 #endif 5785 5786 if (connection->gap_connection_tasks != 0){ 5787 #ifdef ENABLE_CLASSIC 5788 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 5789 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 5790 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 5791 return true; 5792 } 5793 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 5794 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 5795 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5796 return true; 5797 } 5798 #endif 5799 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 5800 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 5801 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5802 return true; 5803 } 5804 } 5805 5806 #ifdef ENABLE_BLE 5807 switch (connection->le_con_parameter_update_state){ 5808 // response to L2CAP CON PARAMETER UPDATE REQUEST 5809 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5810 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5811 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5812 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5813 0x0000, 0xffff); 5814 return true; 5815 case CON_PARAMETER_UPDATE_REPLY: 5816 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5817 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5818 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5819 0x0000, 0xffff); 5820 return true; 5821 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5822 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5823 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5824 return true; 5825 default: 5826 break; 5827 } 5828 if (connection->le_phy_update_all_phys != 0xffu){ 5829 uint8_t all_phys = connection->le_phy_update_all_phys; 5830 connection->le_phy_update_all_phys = 0xff; 5831 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); 5832 return true; 5833 } 5834 #endif 5835 } 5836 return false; 5837 } 5838 5839 static void hci_run(void){ 5840 5841 // stack state sub statemachines 5842 // halting needs to be called even if we cannot send command packet now 5843 switch (hci_stack->state) { 5844 case HCI_STATE_INITIALIZING: 5845 hci_initializing_run(); 5846 break; 5847 case HCI_STATE_HALTING: 5848 hci_halting_run(); 5849 break; 5850 case HCI_STATE_FALLING_ASLEEP: 5851 hci_falling_asleep_run(); 5852 break; 5853 default: 5854 break; 5855 } 5856 5857 bool done; 5858 5859 // send continuation fragments first, as they block the prepared packet buffer 5860 done = hci_run_acl_fragments(); 5861 if (done) return; 5862 5863 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5864 // send host num completed packets next as they don't require num_cmd_packets > 0 5865 if (!hci_can_send_comand_packet_transport()) return; 5866 if (hci_stack->host_completed_packets){ 5867 hci_host_num_completed_packets(); 5868 return; 5869 } 5870 #endif 5871 5872 if (!hci_can_send_command_packet_now()) return; 5873 5874 // global/non-connection oriented commands 5875 5876 5877 #ifdef ENABLE_CLASSIC 5878 // general gap classic 5879 done = hci_run_general_gap_classic(); 5880 if (done) return; 5881 #endif 5882 5883 #ifdef ENABLE_BLE 5884 // general gap le 5885 done = hci_run_general_gap_le(); 5886 if (done) return; 5887 #endif 5888 5889 // send pending HCI commands 5890 hci_run_general_pending_commands(); 5891 } 5892 5893 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5894 // house-keeping 5895 5896 #ifdef ENABLE_CLASSIC 5897 bd_addr_t addr; 5898 hci_connection_t * conn; 5899 #endif 5900 #ifdef ENABLE_LE_CENTRAL 5901 uint8_t initiator_filter_policy; 5902 #endif 5903 5904 uint16_t opcode = little_endian_read_16(packet, 0); 5905 switch (opcode) { 5906 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5907 hci_stack->loopback_mode = packet[3]; 5908 break; 5909 5910 #ifdef ENABLE_CLASSIC 5911 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5912 reverse_bd_addr(&packet[3], addr); 5913 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5914 5915 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5916 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5917 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5918 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5919 } 5920 5921 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5922 if (!conn) { 5923 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5924 if (!conn) { 5925 // notify client that alloc failed 5926 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5927 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5928 } 5929 conn->state = SEND_CREATE_CONNECTION; 5930 conn->role = HCI_ROLE_MASTER; 5931 } 5932 5933 conn->con_handle = HCI_CON_HANDLE_INVALID; 5934 conn->role = HCI_ROLE_INVALID; 5935 5936 log_info("conn state %u", conn->state); 5937 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5938 switch (conn->state) { 5939 // if connection active exists 5940 case OPEN: 5941 // and OPEN, emit connection complete command 5942 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5943 // packet not sent to controller 5944 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5945 case RECEIVED_DISCONNECTION_COMPLETE: 5946 // create connection triggered in disconnect complete event, let's do it now 5947 break; 5948 case SEND_CREATE_CONNECTION: 5949 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5950 if (hci_classic_operation_active()){ 5951 return ERROR_CODE_SUCCESS; 5952 } 5953 #endif 5954 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5955 break; 5956 default: 5957 // otherwise, just ignore as it is already in the open process 5958 // packet not sent to controller 5959 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5960 } 5961 conn->state = SENT_CREATE_CONNECTION; 5962 5963 // track outgoing connection 5964 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5965 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5966 break; 5967 5968 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5969 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5970 // setup_synchronous_connection? Voice setting at offset 22 5971 // TODO: compare to current setting if sco connection already active 5972 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5973 break; 5974 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5975 // accept_synchronous_connection? Voice setting at offset 18 5976 // TODO: compare to current setting if sco connection already active 5977 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5978 // track outgoing connection 5979 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5980 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5981 break; 5982 #endif 5983 #endif 5984 5985 #ifdef ENABLE_BLE 5986 #ifdef ENABLE_LE_CENTRAL 5987 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5988 // white list used? 5989 initiator_filter_policy = packet[7]; 5990 switch (initiator_filter_policy) { 5991 case 0: 5992 // whitelist not used 5993 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5994 break; 5995 case 1: 5996 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5997 break; 5998 default: 5999 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6000 break; 6001 } 6002 // track outgoing connection 6003 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6004 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6005 break; 6006 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6007 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6008 break; 6009 #endif 6010 #endif 6011 default: 6012 break; 6013 } 6014 6015 hci_stack->num_cmd_packets--; 6016 6017 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6018 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6019 if (err != 0){ 6020 return ERROR_CODE_HARDWARE_FAILURE; 6021 } 6022 return ERROR_CODE_SUCCESS; 6023 } 6024 6025 // disconnect because of security block 6026 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6027 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6028 if (!connection) return; 6029 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6030 } 6031 6032 6033 // Configure Secure Simple Pairing 6034 6035 #ifdef ENABLE_CLASSIC 6036 6037 // enable will enable SSP during init 6038 void gap_ssp_set_enable(int enable){ 6039 hci_stack->ssp_enable = enable; 6040 } 6041 6042 static int hci_local_ssp_activated(void){ 6043 return gap_ssp_supported() && hci_stack->ssp_enable; 6044 } 6045 6046 // if set, BTstack will respond to io capability request using authentication requirement 6047 void gap_ssp_set_io_capability(int io_capability){ 6048 hci_stack->ssp_io_capability = io_capability; 6049 } 6050 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6051 hci_stack->ssp_authentication_requirement = authentication_requirement; 6052 } 6053 6054 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6055 void gap_ssp_set_auto_accept(int auto_accept){ 6056 hci_stack->ssp_auto_accept = auto_accept; 6057 } 6058 6059 void gap_secure_connections_enable(bool enable){ 6060 hci_stack->secure_connections_enable = enable; 6061 } 6062 bool gap_secure_connections_active(void){ 6063 return hci_stack->secure_connections_active; 6064 } 6065 6066 #endif 6067 6068 // va_list part of hci_send_cmd 6069 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6070 if (!hci_can_send_command_packet_now()){ 6071 log_error("hci_send_cmd called but cannot send packet now"); 6072 return ERROR_CODE_COMMAND_DISALLOWED; 6073 } 6074 6075 // for HCI INITIALIZATION 6076 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6077 hci_stack->last_cmd_opcode = cmd->opcode; 6078 6079 hci_reserve_packet_buffer(); 6080 uint8_t * packet = hci_stack->hci_packet_buffer; 6081 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6082 uint8_t status = hci_send_cmd_packet(packet, size); 6083 6084 // release packet buffer on error or for synchronous transport implementations 6085 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6086 hci_release_packet_buffer(); 6087 hci_emit_transport_packet_sent(); 6088 } 6089 6090 return status; 6091 } 6092 6093 /** 6094 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6095 */ 6096 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6097 va_list argptr; 6098 va_start(argptr, cmd); 6099 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6100 va_end(argptr); 6101 return status; 6102 } 6103 6104 // Create various non-HCI events. 6105 // TODO: generalize, use table similar to hci_create_command 6106 6107 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6108 // dump packet 6109 if (dump) { 6110 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 6111 } 6112 6113 // dispatch to all event handlers 6114 btstack_linked_list_iterator_t it; 6115 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6116 while (btstack_linked_list_iterator_has_next(&it)){ 6117 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6118 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6119 } 6120 } 6121 6122 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6123 if (!hci_stack->acl_packet_handler) return; 6124 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6125 } 6126 6127 #ifdef ENABLE_CLASSIC 6128 static void hci_notify_if_sco_can_send_now(void){ 6129 // notify SCO sender if waiting 6130 if (!hci_stack->sco_waiting_for_can_send_now) return; 6131 if (hci_can_send_sco_packet_now()){ 6132 hci_stack->sco_waiting_for_can_send_now = 0; 6133 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6134 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6135 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6136 } 6137 } 6138 6139 // parsing end emitting has been merged to reduce code size 6140 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6141 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6142 6143 uint8_t * eir_data; 6144 ad_context_t context; 6145 const uint8_t * name; 6146 uint8_t name_len; 6147 6148 if (size < 3) return; 6149 6150 int event_type = hci_event_packet_get_type(packet); 6151 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6152 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6153 6154 switch (event_type){ 6155 case HCI_EVENT_INQUIRY_RESULT: 6156 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6157 if (size != (3 + (num_responses * 14))) return; 6158 break; 6159 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6160 if (size != 257) return; 6161 if (num_responses != 1) return; 6162 break; 6163 default: 6164 return; 6165 } 6166 6167 // event[1] is set at the end 6168 int i; 6169 for (i=0; i<num_responses;i++){ 6170 memset(event, 0, sizeof(event)); 6171 event[0] = GAP_EVENT_INQUIRY_RESULT; 6172 uint8_t event_size = 27; // if name is not set by EIR 6173 6174 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6175 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6176 (void)memcpy(&event[9], 6177 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6178 3); // class of device 6179 (void)memcpy(&event[12], 6180 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6181 2); // clock offset 6182 6183 switch (event_type){ 6184 case HCI_EVENT_INQUIRY_RESULT: 6185 // 14,15,16,17 = 0, size 18 6186 break; 6187 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6188 event[14] = 1; 6189 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6190 // 16,17 = 0, size 18 6191 break; 6192 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6193 event[14] = 1; 6194 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6195 // EIR packets only contain a single inquiry response 6196 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6197 name = NULL; 6198 // Iterate over EIR data 6199 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6200 uint8_t data_type = ad_iterator_get_data_type(&context); 6201 uint8_t data_size = ad_iterator_get_data_len(&context); 6202 const uint8_t * data = ad_iterator_get_data(&context); 6203 // Prefer Complete Local Name over Shortened Local Name 6204 switch (data_type){ 6205 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6206 if (name) continue; 6207 /* fall through */ 6208 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6209 name = data; 6210 name_len = data_size; 6211 break; 6212 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6213 if (data_size != 8) break; 6214 event[16] = 1; 6215 memcpy(&event[17], data, 8); 6216 break; 6217 default: 6218 break; 6219 } 6220 } 6221 if (name){ 6222 event[25] = 1; 6223 // truncate name if needed 6224 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6225 event[26] = len; 6226 (void)memcpy(&event[27], name, len); 6227 event_size += len; 6228 } 6229 break; 6230 default: 6231 return; 6232 } 6233 event[1] = event_size - 2; 6234 hci_emit_event(event, event_size, 1); 6235 } 6236 } 6237 #endif 6238 6239 void hci_emit_state(void){ 6240 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6241 uint8_t event[3]; 6242 event[0] = BTSTACK_EVENT_STATE; 6243 event[1] = sizeof(event) - 2u; 6244 event[2] = hci_stack->state; 6245 hci_emit_event(event, sizeof(event), 1); 6246 } 6247 6248 #ifdef ENABLE_CLASSIC 6249 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6250 uint8_t event[13]; 6251 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6252 event[1] = sizeof(event) - 2; 6253 event[2] = status; 6254 little_endian_store_16(event, 3, con_handle); 6255 reverse_bd_addr(address, &event[5]); 6256 event[11] = 1; // ACL connection 6257 event[12] = 0; // encryption disabled 6258 hci_emit_event(event, sizeof(event), 1); 6259 } 6260 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6261 if (disable_l2cap_timeouts) return; 6262 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6263 uint8_t event[4]; 6264 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6265 event[1] = sizeof(event) - 2; 6266 little_endian_store_16(event, 2, conn->con_handle); 6267 hci_emit_event(event, sizeof(event), 1); 6268 } 6269 #endif 6270 6271 #ifdef ENABLE_BLE 6272 #ifdef ENABLE_LE_CENTRAL 6273 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){ 6274 uint8_t event[21]; 6275 event[0] = HCI_EVENT_LE_META; 6276 event[1] = sizeof(event) - 2u; 6277 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6278 event[3] = status; 6279 little_endian_store_16(event, 4, con_handle); 6280 event[6] = 0; // TODO: role 6281 event[7] = address_type; 6282 reverse_bd_addr(address, &event[8]); 6283 little_endian_store_16(event, 14, 0); // interval 6284 little_endian_store_16(event, 16, 0); // latency 6285 little_endian_store_16(event, 18, 0); // supervision timeout 6286 event[20] = 0; // master clock accuracy 6287 hci_emit_event(event, sizeof(event), 1); 6288 } 6289 #endif 6290 #endif 6291 6292 static void hci_emit_transport_packet_sent(void){ 6293 // notify upper stack that it might be possible to send again 6294 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6295 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6296 } 6297 6298 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6299 uint8_t event[6]; 6300 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6301 event[1] = sizeof(event) - 2u; 6302 event[2] = 0; // status = OK 6303 little_endian_store_16(event, 3, con_handle); 6304 event[5] = reason; 6305 hci_emit_event(event, sizeof(event), 1); 6306 } 6307 6308 static void hci_emit_nr_connections_changed(void){ 6309 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6310 uint8_t event[3]; 6311 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6312 event[1] = sizeof(event) - 2u; 6313 event[2] = nr_hci_connections(); 6314 hci_emit_event(event, sizeof(event), 1); 6315 } 6316 6317 static void hci_emit_hci_open_failed(void){ 6318 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6319 uint8_t event[2]; 6320 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6321 event[1] = sizeof(event) - 2u; 6322 hci_emit_event(event, sizeof(event), 1); 6323 } 6324 6325 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6326 log_info("hci_emit_dedicated_bonding_result %u ", status); 6327 uint8_t event[9]; 6328 int pos = 0; 6329 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6330 event[pos++] = sizeof(event) - 2u; 6331 event[pos++] = status; 6332 reverse_bd_addr(address, &event[pos]); 6333 hci_emit_event(event, sizeof(event), 1); 6334 } 6335 6336 6337 #ifdef ENABLE_CLASSIC 6338 6339 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6340 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6341 uint8_t event[5]; 6342 int pos = 0; 6343 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6344 event[pos++] = sizeof(event) - 2; 6345 little_endian_store_16(event, 2, con_handle); 6346 pos += 2; 6347 event[pos++] = level; 6348 hci_emit_event(event, sizeof(event), 1); 6349 } 6350 6351 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6352 if (!connection) return LEVEL_0; 6353 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6354 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6355 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6356 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6357 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6358 // LEVEL 4 always requires 128 bit encrytion key size 6359 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6360 security_level = LEVEL_3; 6361 } 6362 return security_level; 6363 } 6364 6365 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6366 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6367 uint8_t event[3]; 6368 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6369 event[1] = sizeof(event) - 2; 6370 event[2] = enabled; 6371 hci_emit_event(event, sizeof(event), 1); 6372 } 6373 6374 // query if remote side supports eSCO 6375 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6376 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6377 if (!connection) return false; 6378 return (connection->remote_supported_features[0] & 1) != 0; 6379 } 6380 6381 static bool hci_ssp_supported(hci_connection_t * connection){ 6382 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6383 return (connection->bonding_flags & mask) == mask; 6384 } 6385 6386 // query if remote side supports SSP 6387 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6388 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6389 if (!connection) return false; 6390 return hci_ssp_supported(connection) ? 1 : 0; 6391 } 6392 6393 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6394 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6395 } 6396 6397 /** 6398 * Check if remote supported features query has completed 6399 */ 6400 bool hci_remote_features_available(hci_con_handle_t handle){ 6401 hci_connection_t * connection = hci_connection_for_handle(handle); 6402 if (!connection) return false; 6403 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6404 } 6405 6406 /** 6407 * Trigger remote supported features query 6408 */ 6409 6410 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6411 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6412 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6413 } 6414 } 6415 6416 void hci_remote_features_query(hci_con_handle_t con_handle){ 6417 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6418 if (!connection) return; 6419 hci_trigger_remote_features_for_connection(connection); 6420 hci_run(); 6421 } 6422 6423 // GAP API 6424 /** 6425 * @bbrief enable/disable bonding. default is enabled 6426 * @praram enabled 6427 */ 6428 void gap_set_bondable_mode(int enable){ 6429 hci_stack->bondable = enable ? 1 : 0; 6430 } 6431 /** 6432 * @brief Get bondable mode. 6433 * @return 1 if bondable 6434 */ 6435 int gap_get_bondable_mode(void){ 6436 return hci_stack->bondable; 6437 } 6438 6439 /** 6440 * @brief map link keys to security levels 6441 */ 6442 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6443 switch (link_key_type){ 6444 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6445 return LEVEL_4; 6446 case COMBINATION_KEY: 6447 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6448 return LEVEL_3; 6449 default: 6450 return LEVEL_2; 6451 } 6452 } 6453 6454 /** 6455 * @brief map link keys to secure connection yes/no 6456 */ 6457 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6458 switch (link_key_type){ 6459 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6460 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6461 return true; 6462 default: 6463 return false; 6464 } 6465 } 6466 6467 /** 6468 * @brief map link keys to authenticated 6469 */ 6470 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6471 switch (link_key_type){ 6472 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6473 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6474 return true; 6475 default: 6476 return false; 6477 } 6478 } 6479 6480 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6481 log_info("gap_mitm_protection_required_for_security_level %u", level); 6482 return level > LEVEL_2; 6483 } 6484 6485 /** 6486 * @brief get current security level 6487 */ 6488 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6489 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6490 if (!connection) return LEVEL_0; 6491 return gap_security_level_for_connection(connection); 6492 } 6493 6494 /** 6495 * @brief request connection to device to 6496 * @result GAP_AUTHENTICATION_RESULT 6497 */ 6498 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6499 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6500 if (!connection){ 6501 hci_emit_security_level(con_handle, LEVEL_0); 6502 return; 6503 } 6504 6505 btstack_assert(hci_is_le_connection(connection) == false); 6506 6507 // 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) 6508 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6509 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6510 requested_level = LEVEL_4; 6511 } 6512 6513 gap_security_level_t current_level = gap_security_level(con_handle); 6514 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6515 requested_level, connection->requested_security_level, current_level); 6516 6517 // authentication active if authentication request was sent or planned level > 0 6518 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6519 if (authentication_active){ 6520 // authentication already active 6521 if (connection->requested_security_level < requested_level){ 6522 // increase requested level as new level is higher 6523 // TODO: handle re-authentication when done 6524 connection->requested_security_level = requested_level; 6525 } 6526 } else { 6527 // no request active, notify if security sufficient 6528 if (requested_level <= current_level){ 6529 hci_emit_security_level(con_handle, current_level); 6530 return; 6531 } 6532 6533 // store request 6534 connection->requested_security_level = requested_level; 6535 6536 // request remote features if not already active 6537 hci_remote_features_query(con_handle); 6538 6539 // start to authenticate connection 6540 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6541 hci_run(); 6542 } 6543 } 6544 6545 /** 6546 * @brief start dedicated bonding with device. disconnect after bonding 6547 * @param device 6548 * @param request MITM protection 6549 * @result GAP_DEDICATED_BONDING_COMPLETE 6550 */ 6551 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6552 6553 // create connection state machine 6554 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6555 6556 if (!connection){ 6557 return BTSTACK_MEMORY_ALLOC_FAILED; 6558 } 6559 6560 // delete linkn key 6561 gap_drop_link_key_for_bd_addr(device); 6562 6563 // configure LEVEL_2/3, dedicated bonding 6564 connection->state = SEND_CREATE_CONNECTION; 6565 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6566 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6567 connection->bonding_flags = BONDING_DEDICATED; 6568 6569 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6570 6571 // handle: connnection failure (connection complete != ok) 6572 // handle: authentication failure 6573 // handle: disconnect on done 6574 6575 hci_run(); 6576 6577 return 0; 6578 } 6579 6580 void gap_set_local_name(const char * local_name){ 6581 hci_stack->local_name = local_name; 6582 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6583 // also update EIR if not set by user 6584 if (hci_stack->eir_data == NULL){ 6585 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6586 } 6587 hci_run(); 6588 } 6589 #endif 6590 6591 6592 #ifdef ENABLE_BLE 6593 6594 #ifdef ENABLE_LE_CENTRAL 6595 void gap_start_scan(void){ 6596 hci_stack->le_scanning_enabled = true; 6597 hci_run(); 6598 } 6599 6600 void gap_stop_scan(void){ 6601 hci_stack->le_scanning_enabled = false; 6602 hci_run(); 6603 } 6604 6605 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6606 hci_stack->le_scan_type = scan_type; 6607 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6608 hci_stack->le_scan_interval = scan_interval; 6609 hci_stack->le_scan_window = scan_window; 6610 hci_stack->le_scanning_param_update = true; 6611 hci_run(); 6612 } 6613 6614 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6615 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6616 } 6617 6618 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6619 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6620 if (!conn){ 6621 // disallow if le connection is already outgoing 6622 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6623 log_error("le connection already active"); 6624 return ERROR_CODE_COMMAND_DISALLOWED; 6625 } 6626 6627 log_info("gap_connect: no connection exists yet, creating context"); 6628 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6629 if (!conn){ 6630 // notify client that alloc failed 6631 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6632 log_info("gap_connect: failed to alloc hci_connection_t"); 6633 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6634 } 6635 6636 // set le connecting state 6637 if (hci_is_le_connection_type(addr_type)){ 6638 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6639 } 6640 6641 conn->state = SEND_CREATE_CONNECTION; 6642 log_info("gap_connect: send create connection next"); 6643 hci_run(); 6644 return ERROR_CODE_SUCCESS; 6645 } 6646 6647 if (!hci_is_le_connection(conn) || 6648 (conn->state == SEND_CREATE_CONNECTION) || 6649 (conn->state == SENT_CREATE_CONNECTION)) { 6650 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6651 log_error("gap_connect: classic connection or connect is already being created"); 6652 return GATT_CLIENT_IN_WRONG_STATE; 6653 } 6654 6655 // check if connection was just disconnected 6656 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6657 log_info("gap_connect: send create connection (again)"); 6658 conn->state = SEND_CREATE_CONNECTION; 6659 hci_run(); 6660 return ERROR_CODE_SUCCESS; 6661 } 6662 6663 log_info("gap_connect: context exists with state %u", conn->state); 6664 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6665 hci_run(); 6666 return ERROR_CODE_SUCCESS; 6667 } 6668 6669 // @assumption: only a single outgoing LE Connection exists 6670 static hci_connection_t * gap_get_outgoing_connection(void){ 6671 btstack_linked_item_t *it; 6672 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6673 hci_connection_t * conn = (hci_connection_t *) it; 6674 if (!hci_is_le_connection(conn)) continue; 6675 switch (conn->state){ 6676 case SEND_CREATE_CONNECTION: 6677 case SENT_CREATE_CONNECTION: 6678 case SENT_CANCEL_CONNECTION: 6679 return conn; 6680 default: 6681 break; 6682 }; 6683 } 6684 return NULL; 6685 } 6686 6687 uint8_t gap_connect_cancel(void){ 6688 hci_connection_t * conn = gap_get_outgoing_connection(); 6689 if (!conn) return 0; 6690 switch (conn->state){ 6691 case SEND_CREATE_CONNECTION: 6692 // skip sending create connection and emit event instead 6693 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6694 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6695 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6696 btstack_memory_hci_connection_free( conn ); 6697 break; 6698 case SENT_CREATE_CONNECTION: 6699 // request to send cancel connection 6700 conn->state = SEND_CANCEL_CONNECTION; 6701 hci_run(); 6702 break; 6703 default: 6704 break; 6705 } 6706 return 0; 6707 } 6708 6709 /** 6710 * @brief Set connection parameters for outgoing connections 6711 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6712 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6713 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6714 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6715 * @param conn_latency, default: 4 6716 * @param supervision_timeout (unit: 10ms), default: 720 ms 6717 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6718 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6719 */ 6720 6721 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6722 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6723 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6724 hci_stack->le_connection_scan_interval = conn_scan_interval; 6725 hci_stack->le_connection_scan_window = conn_scan_window; 6726 hci_stack->le_connection_interval_min = conn_interval_min; 6727 hci_stack->le_connection_interval_max = conn_interval_max; 6728 hci_stack->le_connection_latency = conn_latency; 6729 hci_stack->le_supervision_timeout = supervision_timeout; 6730 hci_stack->le_minimum_ce_length = min_ce_length; 6731 hci_stack->le_maximum_ce_length = max_ce_length; 6732 } 6733 #endif 6734 6735 /** 6736 * @brief Updates the connection parameters for a given LE connection 6737 * @param handle 6738 * @param conn_interval_min (unit: 1.25ms) 6739 * @param conn_interval_max (unit: 1.25ms) 6740 * @param conn_latency 6741 * @param supervision_timeout (unit: 10ms) 6742 * @return 0 if ok 6743 */ 6744 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6745 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6746 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6747 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6748 connection->le_conn_interval_min = conn_interval_min; 6749 connection->le_conn_interval_max = conn_interval_max; 6750 connection->le_conn_latency = conn_latency; 6751 connection->le_supervision_timeout = supervision_timeout; 6752 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6753 hci_run(); 6754 return 0; 6755 } 6756 6757 /** 6758 * @brief Request an update of the connection parameter for a given LE connection 6759 * @param handle 6760 * @param conn_interval_min (unit: 1.25ms) 6761 * @param conn_interval_max (unit: 1.25ms) 6762 * @param conn_latency 6763 * @param supervision_timeout (unit: 10ms) 6764 * @return 0 if ok 6765 */ 6766 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6767 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6768 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6769 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6770 connection->le_conn_interval_min = conn_interval_min; 6771 connection->le_conn_interval_max = conn_interval_max; 6772 connection->le_conn_latency = conn_latency; 6773 connection->le_supervision_timeout = supervision_timeout; 6774 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6775 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6776 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6777 return 0; 6778 } 6779 6780 #ifdef ENABLE_LE_PERIPHERAL 6781 6782 /** 6783 * @brief Set Advertisement Data 6784 * @param advertising_data_length 6785 * @param advertising_data (max 31 octets) 6786 * @note data is not copied, pointer has to stay valid 6787 */ 6788 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6789 hci_stack->le_advertisements_data_len = advertising_data_length; 6790 hci_stack->le_advertisements_data = advertising_data; 6791 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6792 hci_run(); 6793 } 6794 6795 /** 6796 * @brief Set Scan Response Data 6797 * @param advertising_data_length 6798 * @param advertising_data (max 31 octets) 6799 * @note data is not copied, pointer has to stay valid 6800 */ 6801 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6802 hci_stack->le_scan_response_data_len = scan_response_data_length; 6803 hci_stack->le_scan_response_data = scan_response_data; 6804 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6805 hci_run(); 6806 } 6807 6808 /** 6809 * @brief Set Advertisement Parameters 6810 * @param adv_int_min 6811 * @param adv_int_max 6812 * @param adv_type 6813 * @param direct_address_type 6814 * @param direct_address 6815 * @param channel_map 6816 * @param filter_policy 6817 * 6818 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6819 */ 6820 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6821 uint8_t direct_address_typ, bd_addr_t direct_address, 6822 uint8_t channel_map, uint8_t filter_policy) { 6823 6824 hci_stack->le_advertisements_interval_min = adv_int_min; 6825 hci_stack->le_advertisements_interval_max = adv_int_max; 6826 hci_stack->le_advertisements_type = adv_type; 6827 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6828 hci_stack->le_advertisements_channel_map = channel_map; 6829 hci_stack->le_advertisements_filter_policy = filter_policy; 6830 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6831 6); 6832 6833 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6834 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6835 hci_run(); 6836 } 6837 6838 /** 6839 * @brief Enable/Disable Advertisements 6840 * @param enabled 6841 */ 6842 void gap_advertisements_enable(int enabled){ 6843 if (enabled == 0){ 6844 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6845 } else { 6846 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6847 } 6848 hci_update_advertisements_enabled_for_current_roles(); 6849 hci_run(); 6850 } 6851 6852 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6853 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6854 btstack_linked_list_iterator_t it; 6855 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6856 while (btstack_linked_list_iterator_has_next(&it)){ 6857 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6858 if ( item->advertising_handle == advertising_handle ) { 6859 return item; 6860 } 6861 } 6862 return NULL; 6863 } 6864 6865 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6866 // find free advertisement handle 6867 uint8_t advertisement_handle; 6868 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6869 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6870 } 6871 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6872 // clear 6873 memset(storage, 0, sizeof(le_advertising_set_t)); 6874 // copy params 6875 storage->advertising_handle = advertisement_handle; 6876 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6877 // add to list 6878 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6879 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6880 *out_advertising_handle = advertisement_handle; 6881 // set tasks and start 6882 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6883 hci_run(); 6884 return ERROR_CODE_SUCCESS; 6885 } 6886 6887 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6888 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6889 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6890 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6891 // set tasks and start 6892 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6893 hci_run(); 6894 return ERROR_CODE_SUCCESS; 6895 } 6896 6897 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6898 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6899 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6900 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6901 return ERROR_CODE_SUCCESS; 6902 } 6903 6904 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 6905 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6906 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6907 // periodic advertising requires neither connectable, scannable, legacy or anonymous 6908 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6909 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 6910 // set tasks and start 6911 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6912 hci_run(); 6913 return ERROR_CODE_SUCCESS; 6914 } 6915 6916 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 6917 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6918 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6919 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 6920 return ERROR_CODE_SUCCESS; 6921 } 6922 6923 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6924 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6925 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6926 memcpy(advertising_set->random_address, random_address, 6); 6927 // set tasks and start 6928 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6929 hci_run(); 6930 return ERROR_CODE_SUCCESS; 6931 } 6932 6933 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 6934 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6935 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6936 advertising_set->adv_data = advertising_data; 6937 advertising_set->adv_data_len = advertising_data_length; 6938 // set tasks and start 6939 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6940 hci_run(); 6941 return ERROR_CODE_SUCCESS; 6942 } 6943 6944 uint8_t gap_extended_advertising_set_scan_response_data(uint8_t advertising_handle, uint16_t scan_response_data_length, const uint8_t * scan_response_data){ 6945 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6946 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6947 advertising_set->scan_data = scan_response_data; 6948 advertising_set->scan_data_len = scan_response_data_length; 6949 // set tasks and start 6950 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6951 hci_run(); 6952 return ERROR_CODE_SUCCESS; 6953 } 6954 6955 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 6956 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6957 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6958 advertising_set->periodic_data = periodic_data; 6959 advertising_set->periodic_data_len = periodic_data_length; 6960 // set tasks and start 6961 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6962 hci_run(); 6963 return ERROR_CODE_SUCCESS; 6964 } 6965 6966 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6967 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6968 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6969 advertising_set->enable_timeout = timeout; 6970 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6971 // set tasks and start 6972 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6973 hci_run(); 6974 return ERROR_CODE_SUCCESS; 6975 } 6976 6977 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6978 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6979 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6980 // set tasks and start 6981 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6982 hci_run(); 6983 return ERROR_CODE_SUCCESS; 6984 } 6985 6986 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 6987 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6988 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6989 // set tasks and start 6990 advertising_set->periodic_include_adi = include_adi; 6991 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6992 hci_run(); 6993 return ERROR_CODE_SUCCESS; 6994 } 6995 6996 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 6997 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6998 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6999 // set tasks and start 7000 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7001 hci_run(); 7002 return ERROR_CODE_SUCCESS; 7003 } 7004 7005 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7006 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7007 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7008 // set tasks and start 7009 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7010 hci_run(); 7011 return ERROR_CODE_SUCCESS; 7012 } 7013 #endif 7014 7015 #endif 7016 7017 void hci_le_set_own_address_type(uint8_t own_address_type){ 7018 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7019 if (own_address_type == hci_stack->le_own_addr_type) return; 7020 hci_stack->le_own_addr_type = own_address_type; 7021 7022 #ifdef ENABLE_LE_PERIPHERAL 7023 // update advertisement parameters, too 7024 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7025 hci_run(); 7026 #endif 7027 #ifdef ENABLE_LE_CENTRAL 7028 // note: we don't update scan parameters or modify ongoing connection attempts 7029 #endif 7030 } 7031 7032 void hci_le_random_address_set(const bd_addr_t random_address){ 7033 memcpy(hci_stack->le_random_address, random_address, 6); 7034 hci_stack->le_random_address_set = true; 7035 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7036 hci_run(); 7037 } 7038 7039 #endif 7040 7041 uint8_t gap_disconnect(hci_con_handle_t handle){ 7042 hci_connection_t * conn = hci_connection_for_handle(handle); 7043 if (!conn){ 7044 hci_emit_disconnection_complete(handle, 0); 7045 return 0; 7046 } 7047 // ignore if already disconnected 7048 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7049 return 0; 7050 } 7051 conn->state = SEND_DISCONNECT; 7052 hci_run(); 7053 return 0; 7054 } 7055 7056 int gap_read_rssi(hci_con_handle_t con_handle){ 7057 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7058 if (hci_connection == NULL) return 0; 7059 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7060 hci_run(); 7061 return 1; 7062 } 7063 7064 /** 7065 * @brief Get connection type 7066 * @param con_handle 7067 * @result connection_type 7068 */ 7069 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7070 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7071 if (!conn) return GAP_CONNECTION_INVALID; 7072 switch (conn->address_type){ 7073 case BD_ADDR_TYPE_LE_PUBLIC: 7074 case BD_ADDR_TYPE_LE_RANDOM: 7075 return GAP_CONNECTION_LE; 7076 case BD_ADDR_TYPE_SCO: 7077 return GAP_CONNECTION_SCO; 7078 case BD_ADDR_TYPE_ACL: 7079 return GAP_CONNECTION_ACL; 7080 default: 7081 return GAP_CONNECTION_INVALID; 7082 } 7083 } 7084 7085 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7086 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7087 if (!conn) return HCI_ROLE_INVALID; 7088 return (hci_role_t) conn->role; 7089 } 7090 7091 7092 #ifdef ENABLE_CLASSIC 7093 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7094 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7095 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7096 conn->request_role = role; 7097 hci_run(); 7098 return ERROR_CODE_SUCCESS; 7099 } 7100 #endif 7101 7102 #ifdef ENABLE_BLE 7103 7104 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){ 7105 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7106 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7107 7108 conn->le_phy_update_all_phys = all_phys; 7109 conn->le_phy_update_tx_phys = tx_phys; 7110 conn->le_phy_update_rx_phys = rx_phys; 7111 conn->le_phy_update_phy_options = phy_options; 7112 7113 hci_run(); 7114 7115 return 0; 7116 } 7117 7118 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7119 // check if already in list 7120 btstack_linked_list_iterator_t it; 7121 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7122 while (btstack_linked_list_iterator_has_next(&it)) { 7123 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7124 if (entry->address_type != address_type) { 7125 continue; 7126 } 7127 if (memcmp(entry->address, address, 6) != 0) { 7128 continue; 7129 } 7130 // disallow if already scheduled to add 7131 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7132 return ERROR_CODE_COMMAND_DISALLOWED; 7133 } 7134 // still on controller, but scheduled to remove -> re-add 7135 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7136 return ERROR_CODE_SUCCESS; 7137 } 7138 // alloc and add to list 7139 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7140 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7141 entry->address_type = address_type; 7142 (void)memcpy(entry->address, address, 6); 7143 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7144 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7145 return ERROR_CODE_SUCCESS; 7146 } 7147 7148 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7149 btstack_linked_list_iterator_t it; 7150 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7151 while (btstack_linked_list_iterator_has_next(&it)){ 7152 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7153 if (entry->address_type != address_type) { 7154 continue; 7155 } 7156 if (memcmp(entry->address, address, 6) != 0) { 7157 continue; 7158 } 7159 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7160 // remove from controller if already present 7161 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7162 } else { 7163 // directly remove entry from whitelist 7164 btstack_linked_list_iterator_remove(&it); 7165 btstack_memory_whitelist_entry_free(entry); 7166 } 7167 return ERROR_CODE_SUCCESS; 7168 } 7169 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7170 } 7171 7172 static void hci_whitelist_clear(void){ 7173 btstack_linked_list_iterator_t it; 7174 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7175 while (btstack_linked_list_iterator_has_next(&it)){ 7176 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7177 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7178 // remove from controller if already present 7179 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7180 continue; 7181 } 7182 // directly remove entry from whitelist 7183 btstack_linked_list_iterator_remove(&it); 7184 btstack_memory_whitelist_entry_free(entry); 7185 } 7186 } 7187 7188 // free all entries unconditionally 7189 static void hci_whitelist_free(void){ 7190 btstack_linked_list_iterator_t lit; 7191 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7192 while (btstack_linked_list_iterator_has_next(&lit)){ 7193 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7194 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7195 btstack_memory_whitelist_entry_free(entry); 7196 } 7197 } 7198 7199 /** 7200 * @brief Clear Whitelist 7201 * @return 0 if ok 7202 */ 7203 uint8_t gap_whitelist_clear(void){ 7204 hci_whitelist_clear(); 7205 hci_run(); 7206 return ERROR_CODE_SUCCESS; 7207 } 7208 7209 /** 7210 * @brief Add Device to Whitelist 7211 * @param address_typ 7212 * @param address 7213 * @return 0 if ok 7214 */ 7215 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7216 uint8_t status = hci_whitelist_add(address_type, address); 7217 if (status){ 7218 return status; 7219 } 7220 hci_run(); 7221 return ERROR_CODE_SUCCESS; 7222 } 7223 7224 /** 7225 * @brief Remove Device from Whitelist 7226 * @param address_typ 7227 * @param address 7228 * @return 0 if ok 7229 */ 7230 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7231 uint8_t status = hci_whitelist_remove(address_type, address); 7232 if (status){ 7233 return status; 7234 } 7235 hci_run(); 7236 return ERROR_CODE_SUCCESS; 7237 } 7238 7239 #ifdef ENABLE_LE_CENTRAL 7240 /** 7241 * @brief Connect with Whitelist 7242 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7243 * @return - if ok 7244 */ 7245 uint8_t gap_connect_with_whitelist(void){ 7246 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7247 return ERROR_CODE_COMMAND_DISALLOWED; 7248 } 7249 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7250 hci_run(); 7251 return ERROR_CODE_SUCCESS; 7252 } 7253 7254 /** 7255 * @brief Auto Connection Establishment - Start Connecting to device 7256 * @param address_typ 7257 * @param address 7258 * @return 0 if ok 7259 */ 7260 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7261 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7262 return ERROR_CODE_COMMAND_DISALLOWED; 7263 } 7264 7265 uint8_t status = hci_whitelist_add(address_type, address); 7266 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7267 return status; 7268 } 7269 7270 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7271 7272 hci_run(); 7273 return ERROR_CODE_SUCCESS; 7274 } 7275 7276 /** 7277 * @brief Auto Connection Establishment - Stop Connecting to device 7278 * @param address_typ 7279 * @param address 7280 * @return 0 if ok 7281 */ 7282 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7283 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7284 return ERROR_CODE_COMMAND_DISALLOWED; 7285 } 7286 7287 hci_whitelist_remove(address_type, address); 7288 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7289 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7290 } 7291 hci_run(); 7292 return 0; 7293 } 7294 7295 /** 7296 * @brief Auto Connection Establishment - Stop everything 7297 * @note Convenience function to stop all active auto connection attempts 7298 */ 7299 uint8_t gap_auto_connection_stop_all(void){ 7300 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7301 return ERROR_CODE_COMMAND_DISALLOWED; 7302 } 7303 hci_whitelist_clear(); 7304 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7305 hci_run(); 7306 return ERROR_CODE_SUCCESS; 7307 } 7308 7309 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7310 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7311 if (!conn) return 0; 7312 return conn->le_connection_interval; 7313 } 7314 #endif 7315 #endif 7316 7317 #ifdef ENABLE_CLASSIC 7318 /** 7319 * @brief Set Extended Inquiry Response data 7320 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7321 * @note has to be done before stack starts up 7322 */ 7323 void gap_set_extended_inquiry_response(const uint8_t * data){ 7324 hci_stack->eir_data = data; 7325 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7326 hci_run(); 7327 } 7328 7329 /** 7330 * @brief Start GAP Classic Inquiry 7331 * @param duration in 1.28s units 7332 * @return 0 if ok 7333 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7334 */ 7335 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7336 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7337 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7338 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7339 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7340 } 7341 hci_stack->inquiry_state = duration_in_1280ms_units; 7342 hci_run(); 7343 return 0; 7344 } 7345 7346 /** 7347 * @brief Stop GAP Classic Inquiry 7348 * @return 0 if ok 7349 */ 7350 int gap_inquiry_stop(void){ 7351 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7352 // emit inquiry complete event, before it even started 7353 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7354 hci_emit_event(event, sizeof(event), 1); 7355 return 0; 7356 } 7357 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7358 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7359 hci_run(); 7360 return 0; 7361 } 7362 7363 void gap_inquiry_set_lap(uint32_t lap){ 7364 hci_stack->inquiry_lap = lap; 7365 } 7366 7367 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7368 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7369 hci_stack->inquiry_scan_window = inquiry_scan_window; 7370 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7371 hci_run(); 7372 } 7373 7374 7375 /** 7376 * @brief Remote Name Request 7377 * @param addr 7378 * @param page_scan_repetition_mode 7379 * @param clock_offset only used when bit 15 is set 7380 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7381 */ 7382 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7383 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7384 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7385 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7386 hci_stack->remote_name_clock_offset = clock_offset; 7387 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7388 hci_run(); 7389 return 0; 7390 } 7391 7392 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7393 hci_stack->gap_pairing_state = state; 7394 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7395 hci_run(); 7396 return 0; 7397 } 7398 7399 /** 7400 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7401 * @param addr 7402 * @param pin_data 7403 * @param pin_len 7404 * @return 0 if ok 7405 */ 7406 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7407 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7408 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7409 hci_stack->gap_pairing_pin_len = pin_len; 7410 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7411 } 7412 7413 /** 7414 * @brief Legacy Pairing Pin Code Response 7415 * @param addr 7416 * @param pin 7417 * @return 0 if ok 7418 */ 7419 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7420 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7421 } 7422 7423 /** 7424 * @brief Abort Legacy Pairing 7425 * @param addr 7426 * @param pin 7427 * @return 0 if ok 7428 */ 7429 int gap_pin_code_negative(bd_addr_t addr){ 7430 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7431 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7432 } 7433 7434 /** 7435 * @brief SSP Passkey Response 7436 * @param addr 7437 * @param passkey 7438 * @return 0 if ok 7439 */ 7440 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7441 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7442 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7443 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7444 } 7445 7446 /** 7447 * @brief Abort SSP Passkey Entry/Pairing 7448 * @param addr 7449 * @param pin 7450 * @return 0 if ok 7451 */ 7452 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7453 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7454 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7455 } 7456 7457 /** 7458 * @brief Accept SSP Numeric Comparison 7459 * @param addr 7460 * @param passkey 7461 * @return 0 if ok 7462 */ 7463 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7464 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7465 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7466 } 7467 7468 /** 7469 * @brief Abort SSP Numeric Comparison/Pairing 7470 * @param addr 7471 * @param pin 7472 * @return 0 if ok 7473 */ 7474 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7475 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7476 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7477 } 7478 7479 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7480 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7481 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7482 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7483 connectionSetAuthenticationFlags(conn, flag); 7484 hci_run(); 7485 return ERROR_CODE_SUCCESS; 7486 } 7487 #endif 7488 7489 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7490 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7491 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7492 } 7493 7494 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7495 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7496 } 7497 #endif 7498 7499 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7500 /** 7501 * @brief Report Remote OOB Data 7502 * @param bd_addr 7503 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7504 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7505 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7506 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7507 */ 7508 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){ 7509 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7510 if (connection == NULL) { 7511 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7512 } 7513 connection->classic_oob_c_192 = c_192; 7514 connection->classic_oob_r_192 = r_192; 7515 7516 // ignore P-256 if not supported by us 7517 if (hci_stack->secure_connections_active){ 7518 connection->classic_oob_c_256 = c_256; 7519 connection->classic_oob_r_256 = r_256; 7520 } 7521 7522 return ERROR_CODE_SUCCESS; 7523 } 7524 /** 7525 * @brief Generate new OOB data 7526 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7527 */ 7528 void gap_ssp_generate_oob_data(void){ 7529 hci_stack->classic_read_local_oob_data = true; 7530 hci_run(); 7531 } 7532 7533 #endif 7534 7535 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7536 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7537 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7538 if (connection == NULL) { 7539 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7540 } 7541 7542 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7543 connection->link_key_type = type; 7544 7545 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7546 } 7547 7548 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7549 /** 7550 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7551 * @param inquiry_mode see bluetooth_defines.h 7552 */ 7553 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7554 hci_stack->inquiry_mode = inquiry_mode; 7555 } 7556 7557 /** 7558 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7559 */ 7560 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7561 hci_stack->sco_voice_setting = voice_setting; 7562 } 7563 7564 /** 7565 * @brief Get SCO Voice Setting 7566 * @return current voice setting 7567 */ 7568 uint16_t hci_get_sco_voice_setting(void){ 7569 return hci_stack->sco_voice_setting; 7570 } 7571 7572 static int hci_have_usb_transport(void){ 7573 if (!hci_stack->hci_transport) return 0; 7574 const char * transport_name = hci_stack->hci_transport->name; 7575 if (!transport_name) return 0; 7576 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7577 } 7578 7579 /** @brief Get SCO packet length for current SCO Voice setting 7580 * @note Using SCO packets of the exact length is required for USB transfer 7581 * @return Length of SCO packets in bytes (not audio frames) 7582 */ 7583 uint16_t hci_get_sco_packet_length(void){ 7584 uint16_t sco_packet_length = 0; 7585 7586 #ifdef ENABLE_SCO_OVER_HCI 7587 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7588 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7589 7590 if (hci_have_usb_transport()){ 7591 // see Core Spec for H2 USB Transfer. 7592 // 3 byte SCO header + 24 bytes per connection 7593 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7594 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7595 } else { 7596 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7597 sco_packet_length = 3 + 60 * multiplier; 7598 // assert that it still fits inside an SCO buffer 7599 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7600 sco_packet_length = 3 + 60; 7601 } 7602 } 7603 #endif 7604 7605 #ifdef HAVE_SCO_TRANSPORT 7606 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7607 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7608 sco_packet_length = 3 + 60 * multiplier; 7609 #endif 7610 return sco_packet_length; 7611 } 7612 7613 /** 7614 * @brief Sets the master/slave policy 7615 * @param policy (0: attempt to become master, 1: let connecting device decide) 7616 */ 7617 void hci_set_master_slave_policy(uint8_t policy){ 7618 hci_stack->master_slave_policy = policy; 7619 } 7620 7621 #endif 7622 7623 HCI_STATE hci_get_state(void){ 7624 return hci_stack->state; 7625 } 7626 7627 #ifdef ENABLE_CLASSIC 7628 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7629 hci_stack->gap_classic_accept_callback = accept_callback; 7630 } 7631 #endif 7632 7633 /** 7634 * @brief Set callback for Bluetooth Hardware Error 7635 */ 7636 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7637 hci_stack->hardware_error_callback = fn; 7638 } 7639 7640 void hci_disconnect_all(void){ 7641 btstack_linked_list_iterator_t it; 7642 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7643 while (btstack_linked_list_iterator_has_next(&it)){ 7644 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7645 if (con->state == SENT_DISCONNECT) continue; 7646 con->state = SEND_DISCONNECT; 7647 } 7648 hci_run(); 7649 } 7650 7651 uint16_t hci_get_manufacturer(void){ 7652 return hci_stack->manufacturer; 7653 } 7654 7655 #ifdef ENABLE_BLE 7656 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7657 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7658 if (!hci_con) return NULL; 7659 return &hci_con->sm_connection; 7660 } 7661 7662 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7663 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7664 #endif 7665 7666 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7667 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7668 if (hci_connection == NULL) return 0; 7669 if (hci_is_le_connection(hci_connection)){ 7670 #ifdef ENABLE_BLE 7671 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7672 if (sm_conn->sm_connection_encrypted) { 7673 return sm_conn->sm_actual_encryption_key_size; 7674 } 7675 #endif 7676 } else { 7677 #ifdef ENABLE_CLASSIC 7678 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7679 return hci_connection->encryption_key_size; 7680 } 7681 #endif 7682 } 7683 return 0; 7684 } 7685 7686 bool gap_authenticated(hci_con_handle_t con_handle){ 7687 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7688 if (hci_connection == NULL) return false; 7689 7690 switch (hci_connection->address_type){ 7691 #ifdef ENABLE_BLE 7692 case BD_ADDR_TYPE_LE_PUBLIC: 7693 case BD_ADDR_TYPE_LE_RANDOM: 7694 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7695 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7696 #endif 7697 #ifdef ENABLE_CLASSIC 7698 case BD_ADDR_TYPE_SCO: 7699 case BD_ADDR_TYPE_ACL: 7700 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7701 #endif 7702 default: 7703 return false; 7704 } 7705 } 7706 7707 bool gap_secure_connection(hci_con_handle_t con_handle){ 7708 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7709 if (hci_connection == NULL) return 0; 7710 7711 switch (hci_connection->address_type){ 7712 #ifdef ENABLE_BLE 7713 case BD_ADDR_TYPE_LE_PUBLIC: 7714 case BD_ADDR_TYPE_LE_RANDOM: 7715 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7716 return hci_connection->sm_connection.sm_connection_sc != 0; 7717 #endif 7718 #ifdef ENABLE_CLASSIC 7719 case BD_ADDR_TYPE_SCO: 7720 case BD_ADDR_TYPE_ACL: 7721 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7722 #endif 7723 default: 7724 return false; 7725 } 7726 } 7727 7728 bool gap_bonded(hci_con_handle_t con_handle){ 7729 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7730 if (hci_connection == NULL) return 0; 7731 7732 #ifdef ENABLE_CLASSIC 7733 link_key_t link_key; 7734 link_key_type_t link_key_type; 7735 #endif 7736 switch (hci_connection->address_type){ 7737 #ifdef ENABLE_BLE 7738 case BD_ADDR_TYPE_LE_PUBLIC: 7739 case BD_ADDR_TYPE_LE_RANDOM: 7740 return hci_connection->sm_connection.sm_le_db_index >= 0; 7741 #endif 7742 #ifdef ENABLE_CLASSIC 7743 case BD_ADDR_TYPE_SCO: 7744 case BD_ADDR_TYPE_ACL: 7745 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7746 #endif 7747 default: 7748 return false; 7749 } 7750 } 7751 7752 #ifdef ENABLE_BLE 7753 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7754 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7755 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7756 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7757 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7758 return sm_conn->sm_connection_authorization_state; 7759 } 7760 #endif 7761 7762 #ifdef ENABLE_CLASSIC 7763 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){ 7764 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7765 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7766 conn->sniff_min_interval = sniff_min_interval; 7767 conn->sniff_max_interval = sniff_max_interval; 7768 conn->sniff_attempt = sniff_attempt; 7769 conn->sniff_timeout = sniff_timeout; 7770 hci_run(); 7771 return 0; 7772 } 7773 7774 /** 7775 * @brief Exit Sniff mode 7776 * @param con_handle 7777 @ @return 0 if ok 7778 */ 7779 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7780 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7781 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7782 conn->sniff_min_interval = 0xffff; 7783 hci_run(); 7784 return 0; 7785 } 7786 7787 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){ 7788 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7789 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7790 conn->sniff_subrating_max_latency = max_latency; 7791 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7792 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7793 hci_run(); 7794 return ERROR_CODE_SUCCESS; 7795 } 7796 7797 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){ 7798 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7799 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7800 conn->qos_service_type = service_type; 7801 conn->qos_token_rate = token_rate; 7802 conn->qos_peak_bandwidth = peak_bandwidth; 7803 conn->qos_latency = latency; 7804 conn->qos_delay_variation = delay_variation; 7805 hci_run(); 7806 return ERROR_CODE_SUCCESS; 7807 } 7808 7809 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7810 hci_stack->new_page_scan_interval = page_scan_interval; 7811 hci_stack->new_page_scan_window = page_scan_window; 7812 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7813 hci_run(); 7814 } 7815 7816 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7817 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7818 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7819 hci_run(); 7820 } 7821 7822 void gap_set_page_timeout(uint16_t page_timeout){ 7823 hci_stack->page_timeout = page_timeout; 7824 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7825 hci_run(); 7826 } 7827 7828 #endif 7829 7830 void hci_halting_defer(void){ 7831 if (hci_stack->state != HCI_STATE_HALTING) return; 7832 switch (hci_stack->substate){ 7833 case HCI_HALTING_READY_FOR_CLOSE: 7834 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 7835 break; 7836 default: 7837 break; 7838 } 7839 } 7840 7841 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7842 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7843 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7844 if (le_device_db_index >= le_device_db_max_count()) return; 7845 uint8_t offset = le_device_db_index >> 3; 7846 uint8_t mask = 1 << (le_device_db_index & 7); 7847 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7848 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7849 // note: go back to remove entries, otherwise, a remove + add will skip the add 7850 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7851 } 7852 } 7853 7854 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7855 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7856 if (le_device_db_index >= le_device_db_max_count()) return; 7857 uint8_t offset = le_device_db_index >> 3; 7858 uint8_t mask = 1 << (le_device_db_index & 7); 7859 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7860 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7861 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7862 } 7863 } 7864 7865 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7866 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7867 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7868 } 7869 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7870 // restart le resolving list update 7871 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7872 } 7873 return ERROR_CODE_SUCCESS; 7874 } 7875 #endif 7876 7877 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7878 void hci_setup_test_connections_fuzz(void){ 7879 hci_connection_t * conn; 7880 7881 // default address: 66:55:44:33:00:01 7882 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7883 7884 // setup Controller info 7885 hci_stack->num_cmd_packets = 255; 7886 hci_stack->acl_packets_total_num = 255; 7887 7888 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7889 addr[5] = 0x01; 7890 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7891 conn->con_handle = addr[5]; 7892 conn->role = HCI_ROLE_SLAVE; 7893 conn->state = RECEIVED_CONNECTION_REQUEST; 7894 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7895 7896 // setup incoming Classic SCO connection with con handle 0x0002 7897 addr[5] = 0x02; 7898 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7899 conn->con_handle = addr[5]; 7900 conn->role = HCI_ROLE_SLAVE; 7901 conn->state = RECEIVED_CONNECTION_REQUEST; 7902 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7903 7904 // setup ready Classic ACL connection with con handle 0x0003 7905 addr[5] = 0x03; 7906 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7907 conn->con_handle = addr[5]; 7908 conn->role = HCI_ROLE_SLAVE; 7909 conn->state = OPEN; 7910 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7911 7912 // setup ready Classic SCO connection with con handle 0x0004 7913 addr[5] = 0x04; 7914 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7915 conn->con_handle = addr[5]; 7916 conn->role = HCI_ROLE_SLAVE; 7917 conn->state = OPEN; 7918 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7919 7920 // setup ready LE ACL connection with con handle 0x005 and public address 7921 addr[5] = 0x05; 7922 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7923 conn->con_handle = addr[5]; 7924 conn->role = HCI_ROLE_SLAVE; 7925 conn->state = OPEN; 7926 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7927 conn->sm_connection.sm_connection_encrypted = 1; 7928 } 7929 7930 void hci_free_connections_fuzz(void){ 7931 btstack_linked_list_iterator_t it; 7932 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7933 while (btstack_linked_list_iterator_has_next(&it)){ 7934 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7935 btstack_linked_list_iterator_remove(&it); 7936 btstack_memory_hci_connection_free(con); 7937 } 7938 } 7939 void hci_simulate_working_fuzz(void){ 7940 hci_stack->le_scanning_param_update = false; 7941 hci_init_done(); 7942 hci_stack->num_cmd_packets = 255; 7943 } 7944 #endif 7945