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 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 502 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 503 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 504 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 505 hci_connection->bonding_status = status; 506 } 507 } 508 509 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 510 hci_connection_t * conn = hci_connection_for_handle(handle); 511 if (!conn) return false; 512 return hci_pairing_active(conn); 513 } 514 515 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 516 if (!hci_stack->link_key_db) return; 517 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 518 hci_stack->link_key_db->delete_link_key(addr); 519 } 520 521 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 522 if (!hci_stack->link_key_db) return; 523 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 524 hci_stack->link_key_db->put_link_key(addr, link_key, type); 525 } 526 527 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 528 if (!hci_stack->link_key_db) return false; 529 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 530 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 531 return result; 532 } 533 534 void gap_delete_all_link_keys(void){ 535 bd_addr_t addr; 536 link_key_t link_key; 537 link_key_type_t type; 538 btstack_link_key_iterator_t it; 539 int ok = gap_link_key_iterator_init(&it); 540 if (!ok) { 541 log_error("could not initialize iterator"); 542 return; 543 } 544 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 545 gap_drop_link_key_for_bd_addr(addr); 546 } 547 gap_link_key_iterator_done(&it); 548 } 549 550 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 551 if (!hci_stack->link_key_db) return 0; 552 if (!hci_stack->link_key_db->iterator_init) return 0; 553 return hci_stack->link_key_db->iterator_init(it); 554 } 555 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){ 556 if (!hci_stack->link_key_db) return 0; 557 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 558 } 559 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 560 if (!hci_stack->link_key_db) return; 561 hci_stack->link_key_db->iterator_done(it); 562 } 563 #endif 564 565 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 566 switch (address_type){ 567 case BD_ADDR_TYPE_LE_PUBLIC: 568 case BD_ADDR_TYPE_LE_RANDOM: 569 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 570 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 571 return true; 572 default: 573 return false; 574 } 575 } 576 577 static int hci_is_le_connection(hci_connection_t * connection){ 578 return hci_is_le_connection_type(connection->address_type); 579 } 580 581 /** 582 * count connections 583 */ 584 static int nr_hci_connections(void){ 585 int count = 0; 586 btstack_linked_item_t *it; 587 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 588 count++; 589 } 590 return count; 591 } 592 593 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 594 595 unsigned int num_packets_sent_classic = 0; 596 unsigned int num_packets_sent_le = 0; 597 598 btstack_linked_item_t *it; 599 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 600 hci_connection_t * connection = (hci_connection_t *) it; 601 if (hci_is_le_connection(connection)){ 602 num_packets_sent_le += connection->num_packets_sent; 603 } 604 if (connection->address_type == BD_ADDR_TYPE_ACL){ 605 num_packets_sent_classic += connection->num_packets_sent; 606 } 607 } 608 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 609 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 610 int free_slots_le = 0; 611 612 if (free_slots_classic < 0){ 613 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); 614 return 0; 615 } 616 617 if (hci_stack->le_acl_packets_total_num){ 618 // if we have LE slots, they are used 619 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 620 if (free_slots_le < 0){ 621 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); 622 return 0; 623 } 624 } else { 625 // otherwise, classic slots are used for LE, too 626 free_slots_classic -= num_packets_sent_le; 627 if (free_slots_classic < 0){ 628 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); 629 return 0; 630 } 631 } 632 633 switch (address_type){ 634 case BD_ADDR_TYPE_UNKNOWN: 635 log_error("hci_number_free_acl_slots: unknown address type"); 636 return 0; 637 638 case BD_ADDR_TYPE_ACL: 639 return (uint16_t) free_slots_classic; 640 641 default: 642 if (hci_stack->le_acl_packets_total_num > 0){ 643 return (uint16_t) free_slots_le; 644 } 645 return (uint16_t) free_slots_classic; 646 } 647 } 648 649 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 650 // get connection type 651 hci_connection_t * connection = hci_connection_for_handle(con_handle); 652 if (!connection){ 653 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 654 return 0; 655 } 656 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 657 } 658 659 #ifdef ENABLE_CLASSIC 660 static int hci_number_free_sco_slots(void){ 661 unsigned int num_sco_packets_sent = 0; 662 btstack_linked_item_t *it; 663 if (hci_stack->synchronous_flow_control_enabled){ 664 // explicit flow control 665 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 666 hci_connection_t * connection = (hci_connection_t *) it; 667 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 668 num_sco_packets_sent += connection->num_packets_sent; 669 } 670 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 671 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 672 return 0; 673 } 674 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 675 } else { 676 // implicit flow control -- TODO 677 int num_ready = 0; 678 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 679 hci_connection_t * connection = (hci_connection_t *) it; 680 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 681 if (connection->sco_tx_ready == 0) continue; 682 num_ready++; 683 } 684 return num_ready; 685 } 686 } 687 #endif 688 689 // only used to send HCI Host Number Completed Packets 690 static int hci_can_send_comand_packet_transport(void){ 691 if (hci_stack->hci_packet_buffer_reserved) return 0; 692 693 // check for async hci transport implementations 694 if (hci_stack->hci_transport->can_send_packet_now){ 695 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 696 return 0; 697 } 698 } 699 return 1; 700 } 701 702 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 703 bool hci_can_send_command_packet_now(void){ 704 if (hci_can_send_comand_packet_transport() == 0) return false; 705 return hci_stack->num_cmd_packets > 0u; 706 } 707 708 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 709 // check for async hci transport implementations 710 if (!hci_stack->hci_transport->can_send_packet_now) return true; 711 return hci_stack->hci_transport->can_send_packet_now(packet_type); 712 } 713 714 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 715 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 716 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 717 } 718 719 bool hci_can_send_acl_le_packet_now(void){ 720 if (hci_stack->hci_packet_buffer_reserved) return false; 721 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 722 } 723 724 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 725 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 726 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 727 } 728 729 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 730 if (hci_stack->hci_packet_buffer_reserved) return false; 731 return hci_can_send_prepared_acl_packet_now(con_handle); 732 } 733 734 #ifdef ENABLE_CLASSIC 735 bool hci_can_send_acl_classic_packet_now(void){ 736 if (hci_stack->hci_packet_buffer_reserved) return false; 737 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 738 } 739 740 bool hci_can_send_prepared_sco_packet_now(void){ 741 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 742 if (hci_have_usb_transport()){ 743 return hci_stack->sco_can_send_now; 744 } else { 745 return hci_number_free_sco_slots() > 0; 746 } 747 } 748 749 bool hci_can_send_sco_packet_now(void){ 750 if (hci_stack->hci_packet_buffer_reserved) return false; 751 return hci_can_send_prepared_sco_packet_now(); 752 } 753 754 void hci_request_sco_can_send_now_event(void){ 755 hci_stack->sco_waiting_for_can_send_now = 1; 756 hci_notify_if_sco_can_send_now(); 757 } 758 #endif 759 760 // used for internal checks in l2cap.c 761 bool hci_is_packet_buffer_reserved(void){ 762 return hci_stack->hci_packet_buffer_reserved; 763 } 764 765 // reserves outgoing packet buffer. 766 // @return 1 if successful 767 bool hci_reserve_packet_buffer(void){ 768 if (hci_stack->hci_packet_buffer_reserved) { 769 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 770 return false; 771 } 772 hci_stack->hci_packet_buffer_reserved = true; 773 return true; 774 } 775 776 void hci_release_packet_buffer(void){ 777 hci_stack->hci_packet_buffer_reserved = false; 778 } 779 780 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 781 static int hci_transport_synchronous(void){ 782 return hci_stack->hci_transport->can_send_packet_now == NULL; 783 } 784 785 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 786 787 // 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); 788 789 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 790 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 791 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 792 max_acl_data_packet_length = hci_stack->le_data_packets_length; 793 } 794 795 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 796 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 797 max_acl_data_packet_length = connection->le_max_tx_octets; 798 } 799 #endif 800 801 log_debug("hci_send_acl_packet_fragments entered"); 802 803 uint8_t status = ERROR_CODE_SUCCESS; 804 // multiple packets could be send on a synchronous HCI transport 805 while (true){ 806 807 log_debug("hci_send_acl_packet_fragments loop entered"); 808 809 // get current data 810 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 811 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 812 bool more_fragments = false; 813 814 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 815 if (current_acl_data_packet_length > max_acl_data_packet_length){ 816 more_fragments = true; 817 current_acl_data_packet_length = max_acl_data_packet_length; 818 } 819 820 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 821 if (acl_header_pos > 0u){ 822 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 823 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 824 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 825 } 826 827 // update header len 828 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 829 830 // count packet 831 connection->num_packets_sent++; 832 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 833 834 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 835 if (more_fragments){ 836 // update start of next fragment to send 837 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 838 } else { 839 // done 840 hci_stack->acl_fragmentation_pos = 0; 841 hci_stack->acl_fragmentation_total_size = 0; 842 } 843 844 // send packet 845 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 846 const int size = current_acl_data_packet_length + 4; 847 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 848 hci_stack->acl_fragmentation_tx_active = 1; 849 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 850 if (err != 0){ 851 // no error from HCI Transport expected 852 status = ERROR_CODE_HARDWARE_FAILURE; 853 } 854 855 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 856 857 // done yet? 858 if (!more_fragments) break; 859 860 // can send more? 861 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 862 } 863 864 log_debug("hci_send_acl_packet_fragments loop over"); 865 866 // release buffer now for synchronous transport 867 if (hci_transport_synchronous()){ 868 hci_stack->acl_fragmentation_tx_active = 0; 869 hci_release_packet_buffer(); 870 hci_emit_transport_packet_sent(); 871 } 872 873 return status; 874 } 875 876 // pre: caller has reserved the packet buffer 877 uint8_t hci_send_acl_packet_buffer(int size){ 878 btstack_assert(hci_stack->hci_packet_buffer_reserved); 879 880 uint8_t * packet = hci_stack->hci_packet_buffer; 881 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 882 883 // check for free places on Bluetooth module 884 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 885 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 return BTSTACK_ACL_BUFFERS_FULL; 889 } 890 891 hci_connection_t *connection = hci_connection_for_handle( con_handle); 892 if (!connection) { 893 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 894 hci_release_packet_buffer(); 895 hci_emit_transport_packet_sent(); 896 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 897 } 898 899 #ifdef ENABLE_CLASSIC 900 hci_connection_timestamp(connection); 901 #endif 902 903 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 904 905 // setup data 906 hci_stack->acl_fragmentation_total_size = size; 907 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 908 909 return hci_send_acl_packet_fragments(connection); 910 } 911 912 #ifdef ENABLE_CLASSIC 913 // pre: caller has reserved the packet buffer 914 uint8_t hci_send_sco_packet_buffer(int size){ 915 btstack_assert(hci_stack->hci_packet_buffer_reserved); 916 917 uint8_t * packet = hci_stack->hci_packet_buffer; 918 919 // skip checks in loopback mode 920 if (!hci_stack->loopback_mode){ 921 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 922 923 // check for free places on Bluetooth module 924 if (!hci_can_send_prepared_sco_packet_now()) { 925 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 926 hci_release_packet_buffer(); 927 hci_emit_transport_packet_sent(); 928 return BTSTACK_ACL_BUFFERS_FULL; 929 } 930 931 // track send packet in connection struct 932 hci_connection_t *connection = hci_connection_for_handle( con_handle); 933 if (!connection) { 934 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 935 hci_release_packet_buffer(); 936 hci_emit_transport_packet_sent(); 937 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 938 } 939 940 if (hci_have_usb_transport()){ 941 // token used 942 hci_stack->sco_can_send_now = false; 943 } else { 944 if (hci_stack->synchronous_flow_control_enabled){ 945 connection->num_packets_sent++; 946 } else { 947 connection->sco_tx_ready--; 948 } 949 } 950 } 951 952 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 953 954 #ifdef HAVE_SCO_TRANSPORT 955 hci_stack->sco_transport->send_packet(packet, size); 956 hci_release_packet_buffer(); 957 hci_emit_transport_packet_sent(); 958 959 return 0; 960 #else 961 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 962 if (hci_transport_synchronous()){ 963 hci_release_packet_buffer(); 964 hci_emit_transport_packet_sent(); 965 } 966 967 if (err != 0){ 968 return ERROR_CODE_HARDWARE_FAILURE; 969 } 970 return ERROR_CODE_SUCCESS; 971 #endif 972 } 973 #endif 974 975 static void acl_handler(uint8_t *packet, uint16_t size){ 976 977 // get info 978 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 979 hci_connection_t *conn = hci_connection_for_handle(con_handle); 980 uint8_t acl_flags = READ_ACL_FLAGS(packet); 981 uint16_t acl_length = READ_ACL_LENGTH(packet); 982 983 // ignore non-registered handle 984 if (!conn){ 985 log_error("acl_handler called with non-registered handle %u!" , con_handle); 986 return; 987 } 988 989 // assert packet is complete 990 if ((acl_length + 4u) != size){ 991 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 992 return; 993 } 994 995 #ifdef ENABLE_CLASSIC 996 // update idle timestamp 997 hci_connection_timestamp(conn); 998 #endif 999 1000 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1001 hci_stack->host_completed_packets = 1; 1002 conn->num_packets_completed++; 1003 #endif 1004 1005 // handle different packet types 1006 switch (acl_flags & 0x03u) { 1007 1008 case 0x01: // continuation fragment 1009 1010 // sanity checks 1011 if (conn->acl_recombination_pos == 0u) { 1012 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1013 return; 1014 } 1015 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1016 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1017 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1018 conn->acl_recombination_pos = 0; 1019 return; 1020 } 1021 1022 // append fragment payload (header already stored) 1023 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1024 &packet[4], acl_length); 1025 conn->acl_recombination_pos += acl_length; 1026 1027 // forward complete L2CAP packet if complete. 1028 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1029 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1030 // reset recombination buffer 1031 conn->acl_recombination_length = 0; 1032 conn->acl_recombination_pos = 0; 1033 } 1034 break; 1035 1036 case 0x02: { // first fragment 1037 1038 // sanity check 1039 if (conn->acl_recombination_pos) { 1040 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1041 conn->acl_recombination_pos = 0; 1042 } 1043 1044 // peek into L2CAP packet! 1045 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1046 1047 // compare fragment size to L2CAP packet size 1048 if (acl_length >= (l2cap_length + 4u)){ 1049 // forward fragment as L2CAP packet 1050 hci_emit_acl_packet(packet, acl_length + 4u); 1051 } else { 1052 1053 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1054 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1055 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1056 return; 1057 } 1058 1059 // store first fragment and tweak acl length for complete package 1060 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1061 packet, acl_length + 4u); 1062 conn->acl_recombination_pos = acl_length + 4u; 1063 conn->acl_recombination_length = l2cap_length; 1064 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1065 } 1066 break; 1067 1068 } 1069 default: 1070 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1071 return; 1072 } 1073 1074 // execute main loop 1075 hci_run(); 1076 } 1077 1078 static void hci_connection_stop_timer(hci_connection_t * conn){ 1079 btstack_run_loop_remove_timer(&conn->timeout); 1080 #ifdef ENABLE_CLASSIC 1081 btstack_run_loop_remove_timer(&conn->timeout_sco); 1082 #endif 1083 } 1084 1085 static void hci_shutdown_connection(hci_connection_t *conn){ 1086 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1087 1088 #ifdef ENABLE_CLASSIC 1089 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1090 bd_addr_type_t addr_type = conn->address_type; 1091 #endif 1092 #ifdef HAVE_SCO_TRANSPORT 1093 hci_con_handle_t con_handle = conn->con_handle; 1094 #endif 1095 #endif 1096 1097 hci_connection_stop_timer(conn); 1098 1099 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1100 btstack_memory_hci_connection_free( conn ); 1101 1102 // now it's gone 1103 hci_emit_nr_connections_changed(); 1104 1105 #ifdef ENABLE_CLASSIC 1106 #ifdef ENABLE_SCO_OVER_HCI 1107 // update SCO 1108 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1109 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1110 } 1111 #endif 1112 #ifdef HAVE_SCO_TRANSPORT 1113 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1114 hci_stack->sco_transport->close(con_handle); 1115 } 1116 #endif 1117 #endif 1118 } 1119 1120 #ifdef ENABLE_CLASSIC 1121 1122 static const uint16_t packet_type_sizes[] = { 1123 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1124 HCI_ACL_DH1_SIZE, 0, 0, 0, 1125 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1126 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1127 }; 1128 static const uint8_t packet_type_feature_requirement_bit[] = { 1129 0, // 3 slot packets 1130 1, // 5 slot packets 1131 25, // EDR 2 mpbs 1132 26, // EDR 3 mbps 1133 39, // 3 slot EDR packts 1134 40, // 5 slot EDR packet 1135 }; 1136 static const uint16_t packet_type_feature_packet_mask[] = { 1137 0x0f00, // 3 slot packets 1138 0xf000, // 5 slot packets 1139 0x1102, // EDR 2 mpbs 1140 0x2204, // EDR 3 mbps 1141 0x0300, // 3 slot EDR packts 1142 0x3000, // 5 slot EDR packet 1143 }; 1144 1145 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1146 // enable packet types based on size 1147 uint16_t packet_types = 0; 1148 unsigned int i; 1149 for (i=0;i<16;i++){ 1150 if (packet_type_sizes[i] == 0) continue; 1151 if (packet_type_sizes[i] <= buffer_size){ 1152 packet_types |= 1 << i; 1153 } 1154 } 1155 // disable packet types due to missing local supported features 1156 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1157 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1158 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1159 if (feature_set) continue; 1160 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1161 packet_types &= ~packet_type_feature_packet_mask[i]; 1162 } 1163 // flip bits for "may not be used" 1164 packet_types ^= 0x3306; 1165 return packet_types; 1166 } 1167 1168 uint16_t hci_usable_acl_packet_types(void){ 1169 return hci_stack->packet_types; 1170 } 1171 #endif 1172 1173 uint8_t* hci_get_outgoing_packet_buffer(void){ 1174 // hci packet buffer is >= acl data packet length 1175 return hci_stack->hci_packet_buffer; 1176 } 1177 1178 uint16_t hci_max_acl_data_packet_length(void){ 1179 return hci_stack->acl_data_packet_length; 1180 } 1181 1182 #ifdef ENABLE_CLASSIC 1183 bool hci_extended_sco_link_supported(void){ 1184 // No. 31, byte 3, bit 7 1185 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1186 } 1187 #endif 1188 1189 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1190 // No. 54, byte 6, bit 6 1191 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1192 } 1193 1194 #ifdef ENABLE_CLASSIC 1195 static int gap_ssp_supported(void){ 1196 // No. 51, byte 6, bit 3 1197 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1198 } 1199 #endif 1200 1201 static int hci_classic_supported(void){ 1202 #ifdef ENABLE_CLASSIC 1203 // No. 37, byte 4, bit 5, = No BR/EDR Support 1204 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1205 #else 1206 return 0; 1207 #endif 1208 } 1209 1210 static int hci_le_supported(void){ 1211 #ifdef ENABLE_BLE 1212 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1213 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1214 #else 1215 return 0; 1216 #endif 1217 } 1218 1219 static bool hci_command_supported(uint8_t command_index){ 1220 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1221 } 1222 1223 #ifdef ENABLE_BLE 1224 1225 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1226 static bool hci_extended_advertising_supported(void){ 1227 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1228 } 1229 #endif 1230 1231 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1232 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1233 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1234 } else { 1235 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1236 } 1237 } 1238 1239 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1240 *addr_type = hci_stack->le_own_addr_type; 1241 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1242 } 1243 1244 #ifdef ENABLE_LE_PERIPHERAL 1245 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1246 *addr_type = hci_stack->le_advertisements_own_addr_type; 1247 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1248 }; 1249 #endif 1250 1251 #ifdef ENABLE_LE_CENTRAL 1252 1253 /** 1254 * @brief Get own addr type and address used for LE connections (Central) 1255 */ 1256 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1257 *addr_type = hci_stack->le_connection_own_addr_type; 1258 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1259 } 1260 1261 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1262 1263 uint16_t offset = 3; 1264 uint8_t num_reports = packet[offset]; 1265 offset += 1; 1266 1267 uint16_t i; 1268 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1269 for (i=0; (i<num_reports) && (offset < size);i++){ 1270 // sanity checks on data_length: 1271 uint8_t data_length = packet[offset + 8]; 1272 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1273 if ((offset + 9u + data_length + 1u) > size) return; 1274 // setup event 1275 uint8_t event_size = 10u + data_length; 1276 uint16_t pos = 0; 1277 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1278 event[pos++] = event_size; 1279 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1280 offset += 8; 1281 pos += 8; 1282 event[pos++] = packet[offset + 1 + data_length]; // rssi 1283 event[pos++] = data_length; 1284 offset++; 1285 (void)memcpy(&event[pos], &packet[offset], data_length); 1286 pos += data_length; 1287 offset += data_length + 1u; // rssi 1288 hci_emit_event(event, pos, 1); 1289 } 1290 } 1291 1292 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1293 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1294 uint16_t offset = 3; 1295 uint8_t num_reports = packet[offset++]; 1296 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1297 uint8_t i; 1298 for (i=0; (i<num_reports) && (offset < size);i++){ 1299 // sanity checks on data_length: 1300 uint16_t data_length = packet[offset + 23]; 1301 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1302 if ((offset + 24u + data_length) > size) return; 1303 uint16_t event_type = little_endian_read_16(packet, offset); 1304 offset += 2; 1305 if ((event_type & 0x10) != 0) { 1306 // setup legacy event 1307 uint8_t legacy_event_type; 1308 switch (event_type){ 1309 case 0b0010011: 1310 // ADV_IND 1311 legacy_event_type = 0; 1312 break; 1313 case 0b0010101: 1314 // ADV_DIRECT_IND 1315 legacy_event_type = 1; 1316 break; 1317 case 0b0010010: 1318 // ADV_SCAN_IND 1319 legacy_event_type = 2; 1320 break; 1321 case 0b0010000: 1322 // ADV_NONCONN_IND 1323 legacy_event_type = 3; 1324 break; 1325 case 0b0011011: 1326 case 0b0011010: 1327 // SCAN_RSP 1328 legacy_event_type = 4; 1329 break; 1330 default: 1331 legacy_event_type = 0; 1332 break; 1333 } 1334 uint16_t pos = 0; 1335 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1336 event[pos++] = 10u + data_length; 1337 event[pos++] = legacy_event_type; 1338 // copy address type + address 1339 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1340 offset += 7; 1341 pos += 7; 1342 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1343 offset += 4; 1344 // copy rssi 1345 event[pos++] = packet[offset++]; 1346 // skip periodic advertising interval and direct address 1347 offset += 9; 1348 // copy data len + data; 1349 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1350 pos += 1 +data_length; 1351 offset += 1+ data_length; 1352 hci_emit_event(event, pos, 1); 1353 } else { 1354 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1355 uint8_t report_len = 24 + data_length; 1356 event[1] = report_len; 1357 little_endian_store_16(event, 2, event_type); 1358 memcpy(&event[4], &packet[offset], report_len); 1359 offset += report_len; 1360 hci_emit_event(event, 2 + report_len, 1); 1361 } 1362 } 1363 } 1364 #endif 1365 1366 #endif 1367 #endif 1368 1369 #ifdef ENABLE_BLE 1370 #ifdef ENABLE_LE_PERIPHERAL 1371 static void hci_update_advertisements_enabled_for_current_roles(void){ 1372 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1373 // get number of active le slave connections 1374 int num_slave_connections = 0; 1375 btstack_linked_list_iterator_t it; 1376 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1377 while (btstack_linked_list_iterator_has_next(&it)){ 1378 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1379 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1380 if (con->state != OPEN) continue; 1381 if (con->role != HCI_ROLE_SLAVE) continue; 1382 if (!hci_is_le_connection(con)) continue; 1383 num_slave_connections++; 1384 } 1385 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1386 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1387 } else { 1388 hci_stack->le_advertisements_enabled_for_current_roles = false; 1389 } 1390 } 1391 #endif 1392 #endif 1393 1394 #ifdef ENABLE_CLASSIC 1395 static void gap_run_set_local_name(void){ 1396 hci_reserve_packet_buffer(); 1397 uint8_t * packet = hci_stack->hci_packet_buffer; 1398 // construct HCI Command and send 1399 uint16_t opcode = hci_write_local_name.opcode; 1400 hci_stack->last_cmd_opcode = opcode; 1401 packet[0] = opcode & 0xff; 1402 packet[1] = opcode >> 8; 1403 packet[2] = DEVICE_NAME_LEN; 1404 memset(&packet[3], 0, DEVICE_NAME_LEN); 1405 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1406 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1407 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1408 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1409 // expand '00:00:00:00:00:00' in name with bd_addr 1410 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1411 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1412 } 1413 1414 static void gap_run_set_eir_data(void){ 1415 hci_reserve_packet_buffer(); 1416 uint8_t * packet = hci_stack->hci_packet_buffer; 1417 // construct HCI Command in-place and send 1418 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1419 hci_stack->last_cmd_opcode = opcode; 1420 uint16_t offset = 0; 1421 packet[offset++] = opcode & 0xff; 1422 packet[offset++] = opcode >> 8; 1423 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1424 packet[offset++] = 0; // FEC not required 1425 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1426 if (hci_stack->eir_data){ 1427 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1428 ad_context_t context; 1429 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1430 uint8_t data_type = ad_iterator_get_data_type(&context); 1431 uint8_t size = ad_iterator_get_data_len(&context); 1432 const uint8_t *data = ad_iterator_get_data(&context); 1433 // copy item 1434 packet[offset++] = size + 1; 1435 packet[offset++] = data_type; 1436 memcpy(&packet[offset], data, size); 1437 // update name item 1438 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1439 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1440 } 1441 offset += size; 1442 } 1443 } else { 1444 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1445 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1446 packet[offset++] = bytes_to_copy + 1; 1447 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1448 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1449 // expand '00:00:00:00:00:00' in name with bd_addr 1450 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1451 } 1452 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1453 } 1454 1455 static void hci_run_gap_tasks_classic(void){ 1456 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1457 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1458 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1459 return; 1460 } 1461 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1462 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1463 gap_run_set_local_name(); 1464 return; 1465 } 1466 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1467 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1468 gap_run_set_eir_data(); 1469 return; 1470 } 1471 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1472 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1473 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1474 return; 1475 } 1476 // write page scan activity 1477 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1478 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1479 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1480 return; 1481 } 1482 // write page scan type 1483 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1484 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1485 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1486 return; 1487 } 1488 // write page timeout 1489 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1490 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1491 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1492 return; 1493 } 1494 // send scan enable 1495 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1496 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1497 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1498 return; 1499 } 1500 // send write scan activity 1501 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1502 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1503 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1504 return; 1505 } 1506 } 1507 #endif 1508 1509 #ifndef HAVE_HOST_CONTROLLER_API 1510 1511 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1512 if (!hci_stack->config) return 0; 1513 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1514 // Limit baud rate for Broadcom chipsets to 3 mbps 1515 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1516 baud_rate = 3000000; 1517 } 1518 return baud_rate; 1519 } 1520 1521 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1522 UNUSED(ds); 1523 1524 switch (hci_stack->substate){ 1525 case HCI_INIT_W4_SEND_RESET: 1526 log_info("Resend HCI Reset"); 1527 hci_stack->substate = HCI_INIT_SEND_RESET; 1528 hci_stack->num_cmd_packets = 1; 1529 hci_run(); 1530 break; 1531 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1532 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1533 if (hci_stack->hci_transport->reset_link){ 1534 hci_stack->hci_transport->reset_link(); 1535 } 1536 1537 /* fall through */ 1538 1539 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1540 log_info("Resend HCI Reset - CSR Warm Boot"); 1541 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1542 hci_stack->num_cmd_packets = 1; 1543 hci_run(); 1544 break; 1545 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1546 if (hci_stack->hci_transport->set_baudrate){ 1547 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1548 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1549 hci_stack->hci_transport->set_baudrate(baud_rate); 1550 } 1551 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1552 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1553 if (hci_stack->hci_transport->reset_link){ 1554 log_info("Link Reset"); 1555 hci_stack->hci_transport->reset_link(); 1556 } 1557 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1558 hci_run(); 1559 } 1560 break; 1561 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1562 // otherwise continue 1563 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1564 hci_send_cmd(&hci_read_local_supported_commands); 1565 break; 1566 default: 1567 break; 1568 } 1569 } 1570 #endif 1571 1572 static void hci_initializing_next_state(void){ 1573 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1574 } 1575 1576 static void hci_init_done(void){ 1577 // done. tell the app 1578 log_info("hci_init_done -> HCI_STATE_WORKING"); 1579 hci_stack->state = HCI_STATE_WORKING; 1580 hci_emit_state(); 1581 } 1582 1583 // assumption: hci_can_send_command_packet_now() == true 1584 static void hci_initializing_run(void){ 1585 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1586 1587 if (!hci_can_send_command_packet_now()) return; 1588 1589 #ifndef HAVE_HOST_CONTROLLER_API 1590 bool need_baud_change = hci_stack->config 1591 && hci_stack->chipset 1592 && hci_stack->chipset->set_baudrate_command 1593 && hci_stack->hci_transport->set_baudrate 1594 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1595 #endif 1596 1597 switch (hci_stack->substate){ 1598 case HCI_INIT_SEND_RESET: 1599 hci_state_reset(); 1600 1601 #ifndef HAVE_HOST_CONTROLLER_API 1602 // prepare reset if command complete not received in 100ms 1603 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1604 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1605 btstack_run_loop_add_timer(&hci_stack->timeout); 1606 #endif 1607 // send command 1608 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1609 hci_send_cmd(&hci_reset); 1610 break; 1611 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1612 hci_send_cmd(&hci_read_local_version_information); 1613 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1614 break; 1615 1616 #ifndef HAVE_HOST_CONTROLLER_API 1617 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1618 hci_state_reset(); 1619 // prepare reset if command complete not received in 100ms 1620 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1621 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1622 btstack_run_loop_add_timer(&hci_stack->timeout); 1623 // send command 1624 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1625 hci_send_cmd(&hci_reset); 1626 break; 1627 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1628 hci_state_reset(); 1629 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1630 hci_send_cmd(&hci_reset); 1631 break; 1632 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1633 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1634 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1635 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1636 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1637 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1638 break; 1639 } 1640 case HCI_INIT_SET_BD_ADDR: 1641 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1642 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1643 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1644 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1645 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1646 break; 1647 case HCI_INIT_SEND_READ_LOCAL_NAME: 1648 #ifdef ENABLE_CLASSIC 1649 hci_send_cmd(&hci_read_local_name); 1650 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1651 break; 1652 #endif 1653 /* fall through */ 1654 1655 case HCI_INIT_SEND_BAUD_CHANGE: 1656 if (need_baud_change) { 1657 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1658 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1659 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1660 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1661 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1662 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1663 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1664 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1665 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1666 btstack_run_loop_add_timer(&hci_stack->timeout); 1667 } 1668 break; 1669 } 1670 1671 /* fall through */ 1672 1673 case HCI_INIT_CUSTOM_INIT: 1674 // Custom initialization 1675 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1676 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1677 bool send_cmd = false; 1678 switch (hci_stack->chipset_result){ 1679 case BTSTACK_CHIPSET_VALID_COMMAND: 1680 send_cmd = true; 1681 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1682 break; 1683 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1684 send_cmd = true; 1685 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1686 log_info("CSR Warm Boot"); 1687 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1688 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1689 btstack_run_loop_add_timer(&hci_stack->timeout); 1690 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1691 && hci_stack->config 1692 && hci_stack->chipset 1693 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1694 && hci_stack->hci_transport->set_baudrate 1695 && hci_transport_uart_get_main_baud_rate()){ 1696 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1697 } else { 1698 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1699 } 1700 break; 1701 default: 1702 break; 1703 } 1704 1705 if (send_cmd){ 1706 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1707 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1708 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1709 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1710 break; 1711 } 1712 log_info("Init script done"); 1713 1714 // Init script download on Broadcom chipsets causes: 1715 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1716 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1717 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1718 1719 // - baud rate to reset, restore UART baud rate if needed 1720 if (need_baud_change) { 1721 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1722 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1723 hci_stack->hci_transport->set_baudrate(baud_rate); 1724 } 1725 1726 uint16_t bcm_delay_ms = 300; 1727 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1728 // -> Work around: wait here. 1729 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1730 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1731 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1732 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1733 btstack_run_loop_add_timer(&hci_stack->timeout); 1734 break; 1735 } 1736 } 1737 #endif 1738 /* fall through */ 1739 1740 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1741 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1742 hci_send_cmd(&hci_read_local_supported_commands); 1743 break; 1744 case HCI_INIT_READ_BD_ADDR: 1745 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1746 hci_send_cmd(&hci_read_bd_addr); 1747 break; 1748 case HCI_INIT_READ_BUFFER_SIZE: 1749 // only read buffer size if supported 1750 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1751 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1752 hci_send_cmd(&hci_read_buffer_size); 1753 break; 1754 } 1755 1756 /* fall through */ 1757 1758 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1759 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1760 hci_send_cmd(&hci_read_local_supported_features); 1761 break; 1762 1763 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1764 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1765 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1766 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1767 break; 1768 case HCI_INIT_HOST_BUFFER_SIZE: 1769 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1770 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1771 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1772 break; 1773 #endif 1774 1775 case HCI_INIT_SET_EVENT_MASK: 1776 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1777 if (hci_le_supported()){ 1778 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1779 } else { 1780 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1781 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1782 } 1783 break; 1784 1785 case HCI_INIT_SET_EVENT_MASK_2: 1786 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2)){ 1787 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1788 // Encryption Change Event v2 - bit 25 1789 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1790 break; 1791 } 1792 1793 #ifdef ENABLE_CLASSIC 1794 /* fall through */ 1795 1796 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1797 if (hci_classic_supported() && gap_ssp_supported()){ 1798 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1799 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1800 break; 1801 } 1802 1803 /* fall through */ 1804 1805 case HCI_INIT_WRITE_INQUIRY_MODE: 1806 if (hci_classic_supported()){ 1807 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1808 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1809 break; 1810 } 1811 1812 /* fall through */ 1813 1814 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1815 // skip write secure connections host support if not supported or disabled 1816 if (hci_classic_supported() && hci_stack->secure_connections_enable 1817 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1818 hci_stack->secure_connections_active = true; 1819 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1820 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1821 break; 1822 } 1823 1824 /* fall through */ 1825 1826 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1827 // skip set min encryption key size 1828 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1829 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1830 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1831 break; 1832 } 1833 1834 #ifdef ENABLE_SCO_OVER_HCI 1835 /* fall through */ 1836 1837 // only sent if ENABLE_SCO_OVER_HCI is defined 1838 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1839 // skip write synchronous flow control if not supported 1840 if (hci_classic_supported() 1841 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1842 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1843 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1844 break; 1845 } 1846 /* fall through */ 1847 1848 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1849 // skip write default erroneous data reporting if not supported 1850 if (hci_classic_supported() 1851 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1852 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1853 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1854 break; 1855 } 1856 #endif 1857 1858 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1859 /* fall through */ 1860 1861 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1862 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1863 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1864 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1865 #ifdef ENABLE_SCO_OVER_HCI 1866 log_info("BCM: Route SCO data via HCI transport"); 1867 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1868 #endif 1869 #ifdef ENABLE_SCO_OVER_PCM 1870 log_info("BCM: Route SCO data via PCM interface"); 1871 #ifdef ENABLE_BCM_PCM_WBS 1872 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1873 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1874 #else 1875 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1876 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1877 #endif 1878 #endif 1879 break; 1880 } 1881 #endif 1882 1883 #ifdef ENABLE_SCO_OVER_PCM 1884 /* fall through */ 1885 1886 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1887 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1888 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1889 log_info("BCM: Config PCM interface for I2S"); 1890 #ifdef ENABLE_BCM_PCM_WBS 1891 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1892 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1893 #else 1894 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1895 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1896 #endif 1897 break; 1898 } 1899 #endif 1900 #endif 1901 1902 #ifdef ENABLE_BLE 1903 /* fall through */ 1904 1905 // LE INIT 1906 case HCI_INIT_LE_READ_BUFFER_SIZE: 1907 if (hci_le_supported()){ 1908 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1909 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 1910 hci_send_cmd(&hci_le_read_buffer_size_v2); 1911 } else { 1912 hci_send_cmd(&hci_le_read_buffer_size); 1913 } 1914 break; 1915 } 1916 1917 /* fall through */ 1918 1919 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1920 // skip write le host if not supported (e.g. on LE only EM9301) 1921 if (hci_le_supported() 1922 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1923 // LE Supported Host = 1, Simultaneous Host = 0 1924 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1925 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1926 break; 1927 } 1928 1929 /* fall through */ 1930 1931 case HCI_INIT_LE_SET_EVENT_MASK: 1932 if (hci_le_supported()){ 1933 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1934 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1935 break; 1936 } 1937 #endif 1938 1939 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1940 /* fall through */ 1941 1942 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1943 if (hci_le_supported() 1944 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1945 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1946 hci_send_cmd(&hci_le_read_maximum_data_length); 1947 break; 1948 } 1949 1950 /* fall through */ 1951 1952 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1953 if (hci_le_supported() 1954 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1955 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1956 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1957 break; 1958 } 1959 #endif 1960 1961 #ifdef ENABLE_LE_CENTRAL 1962 /* fall through */ 1963 1964 case HCI_INIT_READ_WHITE_LIST_SIZE: 1965 if (hci_le_supported()){ 1966 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1967 hci_send_cmd(&hci_le_read_white_list_size); 1968 break; 1969 } 1970 1971 #endif 1972 1973 #ifdef ENABLE_LE_PERIPHERAL 1974 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1975 /* fall through */ 1976 1977 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1978 if (hci_extended_advertising_supported()){ 1979 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1980 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1981 break; 1982 } 1983 #endif 1984 #endif 1985 /* fall through */ 1986 1987 case HCI_INIT_DONE: 1988 hci_stack->substate = HCI_INIT_DONE; 1989 // main init sequence complete 1990 #ifdef ENABLE_CLASSIC 1991 // check if initial Classic GAP Tasks are completed 1992 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1993 hci_run_gap_tasks_classic(); 1994 break; 1995 } 1996 #endif 1997 #ifdef ENABLE_BLE 1998 #ifdef ENABLE_LE_CENTRAL 1999 // check if initial LE GAP Tasks are completed 2000 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2001 hci_run_general_gap_le(); 2002 break; 2003 } 2004 #endif 2005 #endif 2006 hci_init_done(); 2007 break; 2008 2009 default: 2010 return; 2011 } 2012 } 2013 2014 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2015 bool command_completed = false; 2016 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2017 uint16_t opcode = little_endian_read_16(packet,3); 2018 if (opcode == hci_stack->last_cmd_opcode){ 2019 command_completed = true; 2020 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2021 } else { 2022 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2023 } 2024 } 2025 2026 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2027 uint8_t status = packet[2]; 2028 uint16_t opcode = little_endian_read_16(packet,4); 2029 if (opcode == hci_stack->last_cmd_opcode){ 2030 if (status){ 2031 command_completed = true; 2032 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2033 } else { 2034 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2035 } 2036 } else { 2037 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2038 } 2039 } 2040 #ifndef HAVE_HOST_CONTROLLER_API 2041 // Vendor == CSR 2042 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2043 // TODO: track actual command 2044 command_completed = true; 2045 } 2046 2047 // Vendor == Toshiba 2048 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2049 // TODO: track actual command 2050 command_completed = true; 2051 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2052 hci_stack->num_cmd_packets = 1; 2053 } 2054 #endif 2055 2056 return command_completed; 2057 } 2058 2059 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2060 2061 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2062 2063 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2064 2065 #ifndef HAVE_HOST_CONTROLLER_API 2066 2067 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2068 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2069 // 2070 // HCI Reset 2071 // Timeout 100 ms 2072 // HCI Reset 2073 // Command Complete Reset 2074 // HCI Read Local Version Information 2075 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2076 // hang... 2077 // 2078 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2079 if (!command_completed 2080 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2081 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2082 2083 uint16_t opcode = little_endian_read_16(packet,3); 2084 if (opcode == hci_reset.opcode){ 2085 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2086 return; 2087 } 2088 } 2089 2090 // CSR & H5 2091 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2092 if (!command_completed 2093 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2094 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2095 2096 uint16_t opcode = little_endian_read_16(packet,3); 2097 if (opcode == hci_reset.opcode){ 2098 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2099 return; 2100 } 2101 } 2102 2103 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2104 // fix: Correct substate and behave as command below 2105 if (command_completed){ 2106 switch (hci_stack->substate){ 2107 case HCI_INIT_SEND_RESET: 2108 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2109 break; 2110 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2111 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2112 break; 2113 default: 2114 break; 2115 } 2116 } 2117 2118 #endif 2119 2120 if (!command_completed) return; 2121 2122 bool need_baud_change = false; 2123 bool need_addr_change = false; 2124 2125 #ifndef HAVE_HOST_CONTROLLER_API 2126 need_baud_change = hci_stack->config 2127 && hci_stack->chipset 2128 && hci_stack->chipset->set_baudrate_command 2129 && hci_stack->hci_transport->set_baudrate 2130 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2131 2132 need_addr_change = hci_stack->custom_bd_addr_set 2133 && hci_stack->chipset 2134 && hci_stack->chipset->set_bd_addr_command; 2135 #endif 2136 2137 switch(hci_stack->substate){ 2138 2139 #ifndef HAVE_HOST_CONTROLLER_API 2140 case HCI_INIT_SEND_RESET: 2141 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2142 // fix: just correct substate and behave as command below 2143 2144 /* fall through */ 2145 #endif 2146 2147 case HCI_INIT_W4_SEND_RESET: 2148 btstack_run_loop_remove_timer(&hci_stack->timeout); 2149 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2150 return; 2151 2152 #ifndef HAVE_HOST_CONTROLLER_API 2153 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2154 // for STLC2500D, baud rate change already happened. 2155 // for others, baud rate gets changed now 2156 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2157 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2158 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2159 hci_stack->hci_transport->set_baudrate(baud_rate); 2160 } 2161 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2162 return; 2163 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2164 btstack_run_loop_remove_timer(&hci_stack->timeout); 2165 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2166 return; 2167 case HCI_INIT_W4_CUSTOM_INIT: 2168 // repeat custom init 2169 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2170 return; 2171 #endif 2172 2173 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2174 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2175 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2176 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2177 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2178 return; 2179 } 2180 if (need_addr_change){ 2181 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2182 return; 2183 } 2184 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2185 return; 2186 #ifndef HAVE_HOST_CONTROLLER_API 2187 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2188 if (need_baud_change){ 2189 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2190 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2191 hci_stack->hci_transport->set_baudrate(baud_rate); 2192 } 2193 if (need_addr_change){ 2194 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2195 return; 2196 } 2197 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2198 return; 2199 case HCI_INIT_W4_SET_BD_ADDR: 2200 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2201 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2202 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2203 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2204 return; 2205 } 2206 // skipping st warm boot 2207 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2208 return; 2209 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2210 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2211 return; 2212 #endif 2213 2214 case HCI_INIT_DONE: 2215 // set state if we came here by fall through 2216 hci_stack->substate = HCI_INIT_DONE; 2217 return; 2218 2219 default: 2220 break; 2221 } 2222 hci_initializing_next_state(); 2223 } 2224 2225 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2226 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2227 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2228 // check if we have been aware of the HCI connection 2229 switch (conn->state){ 2230 case SENT_CREATE_CONNECTION: 2231 case RECEIVED_CONNECTION_REQUEST: 2232 break; 2233 default: 2234 return; 2235 } 2236 2237 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2238 bd_addr_t bd_address; 2239 (void)memcpy(&bd_address, conn->address, 6); 2240 2241 #ifdef ENABLE_CLASSIC 2242 // cache needed data 2243 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2244 #endif 2245 2246 // connection failed, remove entry 2247 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2248 btstack_memory_hci_connection_free( conn ); 2249 2250 #ifdef ENABLE_CLASSIC 2251 // notify client if dedicated bonding 2252 if (notify_dedicated_bonding_failed){ 2253 log_info("hci notify_dedicated_bonding_failed"); 2254 hci_emit_dedicated_bonding_result(bd_address, status); 2255 } 2256 2257 // if authentication error, also delete link key 2258 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2259 gap_drop_link_key_for_bd_addr(bd_address); 2260 } 2261 #else 2262 UNUSED(status); 2263 #endif 2264 } 2265 2266 #ifdef ENABLE_CLASSIC 2267 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2268 // SSP Controller 2269 if (features[6] & (1 << 3)){ 2270 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2271 } 2272 // eSCO 2273 if (features[3] & (1<<7)){ 2274 conn->remote_supported_features[0] |= 1; 2275 } 2276 // Extended features 2277 if (features[7] & (1<<7)){ 2278 conn->remote_supported_features[0] |= 2; 2279 } 2280 } 2281 2282 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2283 // SSP Host 2284 if (features[0] & (1 << 0)){ 2285 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2286 } 2287 // SC Host 2288 if (features[0] & (1 << 3)){ 2289 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2290 } 2291 } 2292 2293 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2294 // SC Controller 2295 if (features[1] & (1 << 0)){ 2296 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2297 } 2298 } 2299 2300 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2301 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2302 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2303 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2304 if (conn->bonding_flags & BONDING_DEDICATED){ 2305 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2306 } 2307 } 2308 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2309 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2310 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2311 } 2312 2313 #endif 2314 2315 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2316 // handle BT initialization 2317 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2318 hci_initializing_event_handler(packet, size); 2319 } 2320 2321 // help with BT sleep 2322 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2323 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2324 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2325 hci_initializing_next_state(); 2326 } 2327 } 2328 2329 #ifdef ENABLE_CLASSIC 2330 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2331 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2332 conn->encryption_key_size = encryption_key_size; 2333 2334 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2335 conn->requested_security_level = LEVEL_0; 2336 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2337 return; 2338 } 2339 2340 // Request remote features if not already done 2341 hci_trigger_remote_features_for_connection(conn); 2342 2343 // Request Authentication if not already done 2344 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2345 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2346 } 2347 #endif 2348 2349 static void hci_store_local_supported_commands(const uint8_t * packet){ 2350 // create mapping table 2351 #define X(name, offset, bit) { offset, bit }, 2352 static struct { 2353 uint8_t byte_offset; 2354 uint8_t bit_position; 2355 } supported_hci_commands_map [] = { 2356 SUPPORTED_HCI_COMMANDS 2357 }; 2358 #undef X 2359 2360 // create names for debug purposes 2361 #ifdef ENABLE_LOG_DEBUG 2362 #define X(name, offset, bit) #name, 2363 static const char * command_names[] = { 2364 SUPPORTED_HCI_COMMANDS 2365 }; 2366 #undef X 2367 #endif 2368 2369 hci_stack->local_supported_commands = 0; 2370 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2371 uint16_t i; 2372 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2373 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2374 #ifdef ENABLE_LOG_DEBUG 2375 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); 2376 #else 2377 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2378 #endif 2379 hci_stack->local_supported_commands |= (1LU << i); 2380 } 2381 } 2382 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2383 } 2384 2385 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2386 UNUSED(size); 2387 2388 uint16_t manufacturer; 2389 #ifdef ENABLE_CLASSIC 2390 hci_con_handle_t handle; 2391 hci_connection_t * conn; 2392 uint8_t status; 2393 #endif 2394 // get num cmd packets - limit to 1 to reduce complexity 2395 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2396 2397 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2398 switch (opcode){ 2399 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2400 if (packet[5]) break; 2401 // terminate, name 248 chars 2402 packet[6+248] = 0; 2403 log_info("local name: %s", &packet[6]); 2404 break; 2405 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2406 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2407 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2408 uint16_t acl_len = little_endian_read_16(packet, 6); 2409 uint16_t sco_len = packet[8]; 2410 2411 // determine usable ACL/SCO payload size 2412 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2413 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2414 2415 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2416 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2417 2418 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2419 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2420 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2421 } 2422 break; 2423 case HCI_OPCODE_HCI_READ_RSSI: 2424 if (packet[5] == ERROR_CODE_SUCCESS){ 2425 uint8_t event[5]; 2426 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2427 event[1] = 3; 2428 (void)memcpy(&event[2], &packet[6], 3); 2429 hci_emit_event(event, sizeof(event), 1); 2430 } 2431 break; 2432 #ifdef ENABLE_BLE 2433 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2434 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2435 hci_stack->le_iso_packets_total_num = packet[11]; 2436 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2437 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2438 2439 /* fall through */ 2440 2441 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2442 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2443 hci_stack->le_acl_packets_total_num = packet[8]; 2444 // determine usable ACL payload size 2445 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2446 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2447 } 2448 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); 2449 break; 2450 #endif 2451 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2452 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2453 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2454 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2455 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); 2456 break; 2457 #endif 2458 #ifdef ENABLE_LE_CENTRAL 2459 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2460 hci_stack->le_whitelist_capacity = packet[6]; 2461 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2462 break; 2463 #endif 2464 #ifdef ENABLE_LE_PERIPHERAL 2465 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2466 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2467 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2468 break; 2469 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2470 if (hci_stack->le_advertising_set_in_current_command != 0) { 2471 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2472 hci_stack->le_advertising_set_in_current_command = 0; 2473 if (advertising_set == NULL) break; 2474 uint8_t adv_status = packet[6]; 2475 uint8_t tx_power = packet[7]; 2476 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 }; 2477 if (adv_status == 0){ 2478 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2479 } 2480 hci_emit_event(event, sizeof(event), 1); 2481 } 2482 break; 2483 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2484 if (hci_stack->le_advertising_set_in_current_command != 0) { 2485 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2486 hci_stack->le_advertising_set_in_current_command = 0; 2487 if (advertising_set == NULL) break; 2488 uint8_t adv_status = packet[5]; 2489 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2490 if (adv_status == 0){ 2491 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2492 } 2493 hci_emit_event(event, sizeof(event), 1); 2494 } 2495 break; 2496 #endif 2497 #endif 2498 case HCI_OPCODE_HCI_READ_BD_ADDR: 2499 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2500 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)); 2501 #ifdef ENABLE_CLASSIC 2502 if (hci_stack->link_key_db){ 2503 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2504 } 2505 #endif 2506 break; 2507 #ifdef ENABLE_CLASSIC 2508 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2509 hci_emit_discoverable_enabled(hci_stack->discoverable); 2510 break; 2511 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2512 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2513 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2514 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2515 hci_emit_event(event, sizeof(event), 1); 2516 } 2517 break; 2518 #endif 2519 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2520 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2521 2522 #ifdef ENABLE_CLASSIC 2523 // determine usable ACL packet types based on host buffer size and supported features 2524 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2525 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2526 #endif 2527 // Classic/LE 2528 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2529 break; 2530 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2531 manufacturer = little_endian_read_16(packet, 10); 2532 // map Cypress to Broadcom 2533 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2534 log_info("Treat Cypress as Broadcom"); 2535 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2536 little_endian_store_16(packet, 10, manufacturer); 2537 } 2538 hci_stack->manufacturer = manufacturer; 2539 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2540 break; 2541 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2542 hci_store_local_supported_commands(packet); 2543 break; 2544 #ifdef ENABLE_CLASSIC 2545 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2546 if (packet[5]) return; 2547 hci_stack->synchronous_flow_control_enabled = 1; 2548 break; 2549 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2550 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2551 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2552 conn = hci_connection_for_handle(handle); 2553 if (conn != NULL) { 2554 uint8_t key_size = 0; 2555 if (status == 0){ 2556 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2557 log_info("Handle %04x key Size: %u", handle, key_size); 2558 } else { 2559 key_size = 1; 2560 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2561 } 2562 hci_handle_read_encryption_key_size_complete(conn, key_size); 2563 } 2564 break; 2565 // assert pairing complete event is emitted. 2566 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2567 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2568 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2569 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2570 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2571 // lookup connection by gap pairing addr 2572 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2573 if (conn == NULL) break; 2574 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2575 break; 2576 2577 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2578 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2579 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2580 uint8_t event[67]; 2581 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2582 event[1] = 65; 2583 (void)memset(&event[2], 0, 65); 2584 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2585 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2586 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2587 event[2] = 3; 2588 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2589 } else { 2590 event[2] = 1; 2591 } 2592 } 2593 hci_emit_event(event, sizeof(event), 0); 2594 break; 2595 } 2596 2597 // note: only needed if user does not provide OOB data 2598 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2599 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2600 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2601 if (conn == NULL) break; 2602 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2603 break; 2604 #endif 2605 #endif 2606 default: 2607 break; 2608 } 2609 } 2610 2611 #ifdef ENABLE_BLE 2612 static void event_handle_le_connection_complete(const uint8_t * packet){ 2613 bd_addr_t addr; 2614 bd_addr_type_t addr_type; 2615 hci_connection_t * conn; 2616 2617 // Connection management 2618 reverse_bd_addr(&packet[8], addr); 2619 addr_type = (bd_addr_type_t)packet[7]; 2620 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2621 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2622 2623 #ifdef ENABLE_LE_CENTRAL 2624 // handle error: error is reported only to the initiator -> outgoing connection 2625 if (packet[3]){ 2626 2627 // handle cancelled outgoing connection 2628 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2629 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2630 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2631 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2632 // reset state 2633 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2634 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2635 // get outgoing connection conn struct for direct connect 2636 conn = gap_get_outgoing_connection(); 2637 } 2638 2639 // outgoing le connection establishment is done 2640 if (conn){ 2641 // remove entry 2642 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2643 btstack_memory_hci_connection_free( conn ); 2644 } 2645 return; 2646 } 2647 #endif 2648 2649 // on success, both hosts receive connection complete event 2650 if (packet[6] == HCI_ROLE_MASTER){ 2651 #ifdef ENABLE_LE_CENTRAL 2652 // if we're master on an le connection, it was an outgoing connection and we're done with it 2653 // note: no hci_connection_t object exists yet for connect with whitelist 2654 if (hci_is_le_connection_type(addr_type)){ 2655 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2656 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2657 } 2658 #endif 2659 } else { 2660 #ifdef ENABLE_LE_PERIPHERAL 2661 // if we're slave, it was an incoming connection, advertisements have stopped 2662 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2663 #endif 2664 } 2665 2666 // LE connections are auto-accepted, so just create a connection if there isn't one already 2667 if (!conn){ 2668 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2669 } 2670 2671 // no memory, sorry. 2672 if (!conn){ 2673 return; 2674 } 2675 2676 conn->state = OPEN; 2677 conn->role = packet[6]; 2678 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2679 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2680 2681 #ifdef ENABLE_LE_PERIPHERAL 2682 if (packet[6] == HCI_ROLE_SLAVE){ 2683 hci_update_advertisements_enabled_for_current_roles(); 2684 } 2685 #endif 2686 2687 // init unenhanced att bearer mtu 2688 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2689 conn->att_connection.mtu_exchanged = false; 2690 2691 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2692 2693 // restart timer 2694 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2695 // btstack_run_loop_add_timer(&conn->timeout); 2696 2697 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2698 2699 hci_emit_nr_connections_changed(); 2700 } 2701 #endif 2702 2703 #ifdef ENABLE_CLASSIC 2704 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){ 2705 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2706 // LEVEL_4 is tested by l2cap 2707 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2708 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2709 if (level >= LEVEL_3){ 2710 // MITM not possible without keyboard or display 2711 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2712 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2713 2714 // MITM possible if one side has keyboard and the other has keyboard or display 2715 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2716 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2717 2718 // MITM not possible if one side has only display and other side has no keyboard 2719 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2720 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2721 } 2722 // LEVEL 2 requires SSP, which is a given 2723 return true; 2724 } 2725 2726 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2727 uint16_t i; 2728 for (i=0; i < size ; i++){ 2729 if (data[i] != 0) { 2730 return false; 2731 } 2732 } 2733 return true; 2734 } 2735 2736 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2737 // get requested security level 2738 gap_security_level_t requested_security_level = conn->requested_security_level; 2739 if (hci_stack->gap_secure_connections_only_mode){ 2740 requested_security_level = LEVEL_4; 2741 } 2742 2743 // assess security: LEVEL 4 requires SC 2744 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2745 if ((requested_security_level == LEVEL_4) && 2746 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2747 !hci_remote_sc_enabled(conn)){ 2748 log_info("Level 4 required, but SC not supported -> abort"); 2749 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2750 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2751 return; 2752 } 2753 2754 // assess security based on io capabilities 2755 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2756 // responder: fully validate io caps of both sides as well as OOB data 2757 bool security_possible = false; 2758 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2759 2760 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2761 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2762 // so we merge the OOB data availability 2763 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2764 if (conn->classic_oob_c_192 != NULL){ 2765 have_oob_data |= 1; 2766 } 2767 if (conn->classic_oob_c_256 != NULL){ 2768 have_oob_data |= 2; 2769 } 2770 // for up to Level 3, either P-192 as well as P-256 will do 2771 // 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 2772 // if remote does not SC, we should not receive P-256 data either 2773 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2774 security_possible = true; 2775 } 2776 // for Level 4, P-256 is needed 2777 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2778 security_possible = true; 2779 } 2780 #endif 2781 2782 if (security_possible == false){ 2783 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2784 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2785 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2786 return; 2787 } 2788 } else { 2789 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2790 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2791 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2792 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2793 log_info("Level 3+ required, but no input/output -> abort"); 2794 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2795 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2796 return; 2797 } 2798 #endif 2799 #endif 2800 } 2801 2802 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2803 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2804 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2805 } else { 2806 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2807 } 2808 #endif 2809 } 2810 2811 #endif 2812 2813 static void event_handler(uint8_t *packet, uint16_t size){ 2814 2815 uint16_t event_length = packet[1]; 2816 2817 // assert packet is complete 2818 if (size != (event_length + 2u)){ 2819 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2820 return; 2821 } 2822 2823 bd_addr_type_t addr_type; 2824 hci_con_handle_t handle; 2825 hci_connection_t * conn; 2826 int i; 2827 int create_connection_cmd; 2828 2829 #ifdef ENABLE_CLASSIC 2830 hci_link_type_t link_type; 2831 bd_addr_t addr; 2832 #endif 2833 2834 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2835 2836 switch (hci_event_packet_get_type(packet)) { 2837 2838 case HCI_EVENT_COMMAND_COMPLETE: 2839 handle_command_complete_event(packet, size); 2840 break; 2841 2842 case HCI_EVENT_COMMAND_STATUS: 2843 // get num cmd packets - limit to 1 to reduce complexity 2844 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2845 2846 // check command status to detected failed outgoing connections 2847 create_connection_cmd = 0; 2848 #ifdef ENABLE_CLASSIC 2849 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2850 create_connection_cmd = 1; 2851 } 2852 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2853 create_connection_cmd = 1; 2854 } 2855 #endif 2856 #ifdef ENABLE_LE_CENTRAL 2857 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2858 create_connection_cmd = 1; 2859 } 2860 #endif 2861 if (create_connection_cmd) { 2862 uint8_t status = hci_event_command_status_get_status(packet); 2863 addr_type = hci_stack->outgoing_addr_type; 2864 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2865 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); 2866 2867 // reset outgoing address info 2868 memset(hci_stack->outgoing_addr, 0, 6); 2869 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2870 2871 // on error 2872 if (status != ERROR_CODE_SUCCESS){ 2873 #ifdef ENABLE_LE_CENTRAL 2874 if (hci_is_le_connection_type(addr_type)){ 2875 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2876 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2877 } 2878 #endif 2879 // error => outgoing connection failed 2880 if (conn != NULL){ 2881 hci_handle_connection_failed(conn, status); 2882 } 2883 } 2884 } 2885 2886 #ifdef ENABLE_CLASSIC 2887 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2888 uint8_t status = hci_event_command_status_get_status(packet); 2889 log_info("command status (inquiry), status %x", status); 2890 if (status == ERROR_CODE_SUCCESS) { 2891 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2892 } else { 2893 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2894 } 2895 } 2896 #endif 2897 break; 2898 2899 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2900 if (size < 3) return; 2901 uint16_t num_handles = packet[2]; 2902 if (size != (3u + num_handles * 4u)) return; 2903 uint16_t offset = 3; 2904 for (i=0; i<num_handles;i++){ 2905 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2906 offset += 2u; 2907 uint16_t num_packets = little_endian_read_16(packet, offset); 2908 offset += 2u; 2909 2910 conn = hci_connection_for_handle(handle); 2911 if (!conn){ 2912 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2913 continue; 2914 } 2915 2916 if (conn->num_packets_sent >= num_packets){ 2917 conn->num_packets_sent -= num_packets; 2918 } else { 2919 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2920 conn->num_packets_sent = 0; 2921 } 2922 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2923 2924 #ifdef ENABLE_CLASSIC 2925 // For SCO, we do the can_send_now_check here 2926 hci_notify_if_sco_can_send_now(); 2927 #endif 2928 } 2929 break; 2930 } 2931 2932 #ifdef ENABLE_CLASSIC 2933 case HCI_EVENT_FLUSH_OCCURRED: 2934 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 2935 handle = hci_event_flush_occurred_get_handle(packet); 2936 conn = hci_connection_for_handle(handle); 2937 if (conn) { 2938 log_info("Flush occurred, disconnect 0x%04x", handle); 2939 conn->state = SEND_DISCONNECT; 2940 } 2941 break; 2942 2943 case HCI_EVENT_INQUIRY_COMPLETE: 2944 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2945 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2946 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2947 hci_emit_event(event, sizeof(event), 1); 2948 } 2949 break; 2950 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2951 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2952 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2953 } 2954 break; 2955 case HCI_EVENT_CONNECTION_REQUEST: 2956 reverse_bd_addr(&packet[2], addr); 2957 link_type = (hci_link_type_t) packet[11]; 2958 2959 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2960 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 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 if (hci_stack->gap_classic_accept_callback != NULL){ 2967 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2968 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2969 bd_addr_copy(hci_stack->decline_addr, addr); 2970 break; 2971 } 2972 } 2973 2974 // TODO: eval COD 8-10 2975 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2976 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2977 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2978 if (!conn) { 2979 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2980 } 2981 if (!conn) { 2982 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2983 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2984 bd_addr_copy(hci_stack->decline_addr, addr); 2985 hci_run(); 2986 // avoid event to higher layer 2987 return; 2988 } 2989 conn->role = HCI_ROLE_SLAVE; 2990 conn->state = RECEIVED_CONNECTION_REQUEST; 2991 // store info about eSCO 2992 if (link_type == HCI_LINK_TYPE_ESCO){ 2993 conn->remote_supported_features[0] |= 1; 2994 } 2995 hci_run(); 2996 break; 2997 2998 case HCI_EVENT_CONNECTION_COMPLETE: 2999 // Connection management 3000 reverse_bd_addr(&packet[5], addr); 3001 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3002 addr_type = BD_ADDR_TYPE_ACL; 3003 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3004 if (conn) { 3005 if (!packet[2]){ 3006 conn->state = OPEN; 3007 conn->con_handle = little_endian_read_16(packet, 3); 3008 3009 // trigger write supervision timeout if we're master 3010 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3011 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3012 } 3013 3014 // trigger write automatic flush timeout 3015 if (hci_stack->automatic_flush_timeout != 0){ 3016 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3017 } 3018 3019 // restart timer 3020 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3021 btstack_run_loop_add_timer(&conn->timeout); 3022 3023 // trigger remote features for dedicated bonding 3024 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3025 hci_trigger_remote_features_for_connection(conn); 3026 } 3027 3028 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3029 3030 hci_emit_nr_connections_changed(); 3031 } else { 3032 // connection failed 3033 hci_handle_connection_failed(conn, packet[2]); 3034 } 3035 } 3036 break; 3037 3038 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3039 reverse_bd_addr(&packet[5], addr); 3040 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3041 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3042 if (packet[2]){ 3043 // connection failed 3044 if (conn){ 3045 hci_handle_connection_failed(conn, packet[2]); 3046 } 3047 break; 3048 } 3049 if (!conn) { 3050 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3051 } 3052 if (!conn) { 3053 break; 3054 } 3055 conn->state = OPEN; 3056 conn->con_handle = little_endian_read_16(packet, 3); 3057 3058 #ifdef ENABLE_SCO_OVER_HCI 3059 // update SCO 3060 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3061 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3062 } 3063 // trigger can send now 3064 if (hci_have_usb_transport()){ 3065 hci_stack->sco_can_send_now = true; 3066 } 3067 #endif 3068 #ifdef HAVE_SCO_TRANSPORT 3069 // configure sco transport 3070 if (hci_stack->sco_transport != NULL){ 3071 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3072 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3073 } 3074 #endif 3075 break; 3076 3077 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3078 handle = little_endian_read_16(packet, 3); 3079 conn = hci_connection_for_handle(handle); 3080 if (!conn) break; 3081 if (!packet[2]){ 3082 const uint8_t * features = &packet[5]; 3083 hci_handle_remote_features_page_0(conn, features); 3084 3085 // read extended features if possible 3086 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3087 && ((conn->remote_supported_features[0] & 2) != 0)) { 3088 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3089 break; 3090 } 3091 } 3092 hci_handle_remote_features_received(conn); 3093 break; 3094 3095 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3096 handle = little_endian_read_16(packet, 3); 3097 conn = hci_connection_for_handle(handle); 3098 if (!conn) break; 3099 // status = ok, page = 1 3100 if (!packet[2]) { 3101 uint8_t page_number = packet[5]; 3102 uint8_t maximum_page_number = packet[6]; 3103 const uint8_t * features = &packet[7]; 3104 bool done = false; 3105 switch (page_number){ 3106 case 1: 3107 hci_handle_remote_features_page_1(conn, features); 3108 if (maximum_page_number >= 2){ 3109 // get Secure Connections (Controller) from Page 2 if available 3110 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3111 } else { 3112 // otherwise, assume SC (Controller) == SC (Host) 3113 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3114 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3115 } 3116 done = true; 3117 } 3118 break; 3119 case 2: 3120 hci_handle_remote_features_page_2(conn, features); 3121 done = true; 3122 break; 3123 default: 3124 break; 3125 } 3126 if (!done) break; 3127 } 3128 hci_handle_remote_features_received(conn); 3129 break; 3130 3131 case HCI_EVENT_LINK_KEY_REQUEST: 3132 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3133 hci_event_link_key_request_get_bd_addr(packet, addr); 3134 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3135 if (!conn) break; 3136 3137 // lookup link key in db if not cached 3138 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3139 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3140 } 3141 3142 // response sent by hci_run() 3143 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3144 #endif 3145 break; 3146 3147 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3148 hci_event_link_key_request_get_bd_addr(packet, addr); 3149 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3150 if (!conn) break; 3151 3152 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3153 3154 // CVE-2020-26555: ignore NULL link key 3155 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3156 if (btstack_is_null(&packet[8], 16)) break; 3157 3158 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3159 // Change Connection Encryption keeps link key type 3160 if (link_key_type != CHANGED_COMBINATION_KEY){ 3161 conn->link_key_type = link_key_type; 3162 } 3163 3164 // cache link key. link keys stored in little-endian format for legacy reasons 3165 memcpy(&conn->link_key, &packet[8], 16); 3166 3167 // only store link key: 3168 // - if bondable enabled 3169 if (hci_stack->bondable == false) break; 3170 // - if security level sufficient 3171 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3172 // - for SSP, also check if remote side requested bonding as well 3173 if (conn->link_key_type != COMBINATION_KEY){ 3174 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3175 if (!remote_bonding){ 3176 break; 3177 } 3178 } 3179 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3180 break; 3181 } 3182 3183 case HCI_EVENT_PIN_CODE_REQUEST: 3184 hci_event_pin_code_request_get_bd_addr(packet, addr); 3185 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3186 if (!conn) break; 3187 3188 hci_pairing_started(conn, false); 3189 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3190 if (!hci_stack->bondable ){ 3191 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3192 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3193 hci_run(); 3194 return; 3195 } 3196 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3197 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3198 log_info("Level 4 required, but SC not supported -> abort"); 3199 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3200 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3201 hci_run(); 3202 return; 3203 } 3204 break; 3205 3206 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3207 hci_event_io_capability_response_get_bd_addr(packet, addr); 3208 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3209 if (!conn) break; 3210 3211 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3212 hci_pairing_started(conn, true); 3213 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3214 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3215 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3216 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3217 #endif 3218 break; 3219 3220 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3221 hci_event_io_capability_response_get_bd_addr(packet, addr); 3222 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3223 if (!conn) break; 3224 3225 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3226 hci_connection_timestamp(conn); 3227 hci_pairing_started(conn, true); 3228 break; 3229 3230 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3231 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3232 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3233 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3234 if (!conn) break; 3235 3236 hci_connection_timestamp(conn); 3237 3238 hci_pairing_started(conn, true); 3239 3240 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3241 break; 3242 #endif 3243 3244 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3245 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3246 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3247 if (!conn) break; 3248 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3249 if (hci_stack->ssp_auto_accept){ 3250 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3251 }; 3252 } else { 3253 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3254 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3255 // don't forward event to app 3256 hci_run(); 3257 return; 3258 } 3259 break; 3260 3261 case HCI_EVENT_USER_PASSKEY_REQUEST: 3262 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3263 if (hci_stack->ssp_auto_accept){ 3264 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3265 }; 3266 break; 3267 3268 case HCI_EVENT_MODE_CHANGE: 3269 handle = hci_event_mode_change_get_handle(packet); 3270 conn = hci_connection_for_handle(handle); 3271 if (!conn) break; 3272 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3273 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3274 break; 3275 #endif 3276 3277 case HCI_EVENT_ENCRYPTION_CHANGE: 3278 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3279 handle = hci_event_encryption_change_get_connection_handle(packet); 3280 conn = hci_connection_for_handle(handle); 3281 if (!conn) break; 3282 if (hci_event_encryption_change_get_status(packet) == 0u) { 3283 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3284 if (encryption_enabled){ 3285 if (hci_is_le_connection(conn)){ 3286 // For LE, we accept connection as encrypted 3287 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3288 } 3289 #ifdef ENABLE_CLASSIC 3290 else { 3291 3292 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3293 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3294 bool connected_uses_aes_ccm = encryption_enabled == 2; 3295 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3296 log_info("SC during pairing, but only E0 now -> abort"); 3297 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3298 break; 3299 } 3300 3301 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3302 if (connected_uses_aes_ccm){ 3303 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3304 } 3305 3306 #ifdef ENABLE_TESTING_SUPPORT 3307 // work around for issue with PTS dongle 3308 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3309 #endif 3310 // validate encryption key size 3311 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3312 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3313 // already got encryption key size 3314 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3315 } else { 3316 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3317 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3318 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3319 } else { 3320 // if not, pretend everything is perfect 3321 hci_handle_read_encryption_key_size_complete(conn, 16); 3322 } 3323 } 3324 } 3325 #endif 3326 } else { 3327 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3328 } 3329 } else { 3330 uint8_t status = hci_event_encryption_change_get_status(packet); 3331 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3332 conn->bonding_flags &= ~BONDING_DEDICATED; 3333 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3334 conn->bonding_status = status; 3335 } 3336 } 3337 3338 break; 3339 3340 #ifdef ENABLE_CLASSIC 3341 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3342 handle = hci_event_authentication_complete_get_connection_handle(packet); 3343 conn = hci_connection_for_handle(handle); 3344 if (!conn) break; 3345 3346 // clear authentication active flag 3347 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3348 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3349 3350 // authenticated only if auth status == 0 3351 if (hci_event_authentication_complete_get_status(packet) == 0){ 3352 // authenticated 3353 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3354 3355 // If not already encrypted, start encryption 3356 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3357 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3358 break; 3359 } 3360 } 3361 3362 // emit updated security level 3363 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3364 break; 3365 3366 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3367 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3368 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3369 if (!conn) break; 3370 3371 // treat successfully paired connection as authenticated 3372 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3373 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3374 } 3375 3376 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3377 break; 3378 #endif 3379 3380 // HCI_EVENT_DISCONNECTION_COMPLETE 3381 // has been split, to first notify stack before shutting connection down 3382 // see end of function, too. 3383 case HCI_EVENT_DISCONNECTION_COMPLETE: 3384 if (packet[2]) break; // status != 0 3385 handle = little_endian_read_16(packet, 3); 3386 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3387 if (hci_stack->acl_fragmentation_total_size > 0u) { 3388 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3389 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3390 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3391 hci_stack->acl_fragmentation_total_size = 0; 3392 hci_stack->acl_fragmentation_pos = 0; 3393 if (release_buffer){ 3394 hci_release_packet_buffer(); 3395 } 3396 } 3397 } 3398 3399 conn = hci_connection_for_handle(handle); 3400 if (!conn) break; 3401 #ifdef ENABLE_CLASSIC 3402 // pairing failed if it was ongoing 3403 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3404 #endif 3405 3406 // emit dedicatd bonding event 3407 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3408 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3409 } 3410 3411 // mark connection for shutdown, stop timers, reset state 3412 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3413 hci_connection_stop_timer(conn); 3414 hci_connection_init(conn); 3415 3416 #ifdef ENABLE_BLE 3417 #ifdef ENABLE_LE_PERIPHERAL 3418 // re-enable advertisements for le connections if active 3419 if (hci_is_le_connection(conn)){ 3420 hci_update_advertisements_enabled_for_current_roles(); 3421 } 3422 #endif 3423 #endif 3424 break; 3425 3426 case HCI_EVENT_HARDWARE_ERROR: 3427 log_error("Hardware Error: 0x%02x", packet[2]); 3428 if (hci_stack->hardware_error_callback){ 3429 (*hci_stack->hardware_error_callback)(packet[2]); 3430 } else { 3431 // if no special requests, just reboot stack 3432 hci_power_control_off(); 3433 hci_power_control_on(); 3434 } 3435 break; 3436 3437 #ifdef ENABLE_CLASSIC 3438 case HCI_EVENT_ROLE_CHANGE: 3439 if (packet[2]) break; // status != 0 3440 reverse_bd_addr(&packet[3], addr); 3441 addr_type = BD_ADDR_TYPE_ACL; 3442 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3443 if (!conn) break; 3444 conn->role = packet[9]; 3445 break; 3446 #endif 3447 3448 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3449 // release packet buffer only for asynchronous transport and if there are not further fragements 3450 if (hci_transport_synchronous()) { 3451 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3452 return; // instead of break: to avoid re-entering hci_run() 3453 } 3454 hci_stack->acl_fragmentation_tx_active = 0; 3455 if (hci_stack->acl_fragmentation_total_size) break; 3456 hci_release_packet_buffer(); 3457 3458 // L2CAP receives this event via the hci_emit_event below 3459 3460 #ifdef ENABLE_CLASSIC 3461 // For SCO, we do the can_send_now_check here 3462 hci_notify_if_sco_can_send_now(); 3463 #endif 3464 break; 3465 3466 #ifdef ENABLE_CLASSIC 3467 case HCI_EVENT_SCO_CAN_SEND_NOW: 3468 // For SCO, we do the can_send_now_check here 3469 hci_stack->sco_can_send_now = true; 3470 hci_notify_if_sco_can_send_now(); 3471 return; 3472 3473 // explode inquriy results for easier consumption 3474 case HCI_EVENT_INQUIRY_RESULT: 3475 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3476 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3477 gap_inquiry_explode(packet, size); 3478 break; 3479 #endif 3480 3481 #ifdef ENABLE_BLE 3482 case HCI_EVENT_LE_META: 3483 switch (packet[2]){ 3484 #ifdef ENABLE_LE_CENTRAL 3485 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3486 if (!hci_stack->le_scanning_enabled) break; 3487 le_handle_advertisement_report(packet, size); 3488 break; 3489 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3490 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3491 if (!hci_stack->le_scanning_enabled) break; 3492 le_handle_extended_advertisement_report(packet, size); 3493 break; 3494 #endif 3495 #endif 3496 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3497 event_handle_le_connection_complete(packet); 3498 break; 3499 3500 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3501 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3502 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3503 conn = hci_connection_for_handle(handle); 3504 if (!conn) break; 3505 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3506 break; 3507 3508 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3509 // connection 3510 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3511 conn = hci_connection_for_handle(handle); 3512 if (conn) { 3513 // read arguments 3514 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3515 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3516 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3517 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3518 3519 // validate against current connection parameter range 3520 le_connection_parameter_range_t existing_range; 3521 gap_get_connection_parameter_range(&existing_range); 3522 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3523 if (update_parameter){ 3524 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3525 conn->le_conn_interval_min = le_conn_interval_min; 3526 conn->le_conn_interval_max = le_conn_interval_max; 3527 conn->le_conn_latency = le_conn_latency; 3528 conn->le_supervision_timeout = le_supervision_timeout; 3529 } else { 3530 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3531 } 3532 } 3533 break; 3534 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3535 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3536 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3537 conn = hci_connection_for_handle(handle); 3538 if (conn) { 3539 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3540 } 3541 break; 3542 #endif 3543 default: 3544 break; 3545 } 3546 break; 3547 #endif 3548 case HCI_EVENT_VENDOR_SPECIFIC: 3549 // Vendor specific commands often create vendor specific event instead of num completed packets 3550 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3551 switch (hci_stack->manufacturer){ 3552 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3553 hci_stack->num_cmd_packets = 1; 3554 break; 3555 default: 3556 break; 3557 } 3558 break; 3559 default: 3560 break; 3561 } 3562 3563 handle_event_for_current_stack_state(packet, size); 3564 3565 // notify upper stack 3566 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3567 3568 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3569 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3570 handle = little_endian_read_16(packet, 3); 3571 hci_connection_t * aConn = hci_connection_for_handle(handle); 3572 // discard connection if app did not trigger a reconnect in the event handler 3573 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3574 hci_shutdown_connection(aConn); 3575 } 3576 } 3577 3578 // execute main loop 3579 hci_run(); 3580 } 3581 3582 #ifdef ENABLE_CLASSIC 3583 3584 #ifdef ENABLE_SCO_OVER_HCI 3585 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3586 static void sco_schedule_tx(hci_connection_t * conn); 3587 3588 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3589 log_debug("SCO TX Timeout"); 3590 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3591 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3592 if (!conn) return; 3593 3594 // trigger send 3595 conn->sco_tx_ready = 1; 3596 // extra packet if CVSD but SCO buffer is too short 3597 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3598 conn->sco_tx_ready++; 3599 } 3600 hci_notify_if_sco_can_send_now(); 3601 } 3602 3603 3604 #define SCO_TX_AFTER_RX_MS (6) 3605 3606 static void sco_schedule_tx(hci_connection_t * conn){ 3607 3608 uint32_t now = btstack_run_loop_get_time_ms(); 3609 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3610 int time_delta_ms = sco_tx_ms - now; 3611 3612 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3613 3614 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3615 btstack_run_loop_remove_timer(timer); 3616 btstack_run_loop_set_timer(timer, time_delta_ms); 3617 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3618 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3619 btstack_run_loop_add_timer(timer); 3620 } 3621 #endif 3622 3623 static void sco_handler(uint8_t * packet, uint16_t size){ 3624 // lookup connection struct 3625 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3626 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3627 if (!conn) return; 3628 3629 #ifdef ENABLE_SCO_OVER_HCI 3630 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3631 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3632 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3633 packet[2] = 0x3c; 3634 memmove(&packet[3], &packet[23], 63); 3635 size = 63; 3636 } 3637 } 3638 3639 if (hci_have_usb_transport()){ 3640 // Nothing to do 3641 } else { 3642 // 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); 3643 if (hci_stack->synchronous_flow_control_enabled == 0){ 3644 uint32_t now = btstack_run_loop_get_time_ms(); 3645 3646 if (!conn->sco_rx_valid){ 3647 // ignore first 10 packets 3648 conn->sco_rx_count++; 3649 // log_debug("sco rx count %u", conn->sco_rx_count); 3650 if (conn->sco_rx_count == 10) { 3651 // use first timestamp as is and pretent it just started 3652 conn->sco_rx_ms = now; 3653 conn->sco_rx_valid = 1; 3654 conn->sco_rx_count = 0; 3655 sco_schedule_tx(conn); 3656 } 3657 } else { 3658 // track expected arrival timme 3659 conn->sco_rx_count++; 3660 conn->sco_rx_ms += 7; 3661 int delta = (int32_t) (now - conn->sco_rx_ms); 3662 if (delta > 0){ 3663 conn->sco_rx_ms++; 3664 } 3665 // log_debug("sco rx %u", conn->sco_rx_ms); 3666 sco_schedule_tx(conn); 3667 } 3668 } 3669 } 3670 #endif 3671 3672 // deliver to app 3673 if (hci_stack->sco_packet_handler) { 3674 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3675 } 3676 3677 #ifdef HAVE_SCO_TRANSPORT 3678 // We can send one packet for each received packet 3679 conn->sco_tx_ready++; 3680 hci_notify_if_sco_can_send_now(); 3681 #endif 3682 3683 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3684 conn->num_packets_completed++; 3685 hci_stack->host_completed_packets = 1; 3686 hci_run(); 3687 #endif 3688 } 3689 #endif 3690 3691 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3692 hci_dump_packet(packet_type, 1, packet, size); 3693 switch (packet_type) { 3694 case HCI_EVENT_PACKET: 3695 event_handler(packet, size); 3696 break; 3697 case HCI_ACL_DATA_PACKET: 3698 acl_handler(packet, size); 3699 break; 3700 #ifdef ENABLE_CLASSIC 3701 case HCI_SCO_DATA_PACKET: 3702 sco_handler(packet, size); 3703 break; 3704 #endif 3705 default: 3706 break; 3707 } 3708 } 3709 3710 /** 3711 * @brief Add event packet handler. 3712 */ 3713 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3714 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3715 } 3716 3717 /** 3718 * @brief Remove event packet handler. 3719 */ 3720 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3721 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3722 } 3723 3724 /** Register HCI packet handlers */ 3725 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3726 hci_stack->acl_packet_handler = handler; 3727 } 3728 3729 #ifdef ENABLE_CLASSIC 3730 /** 3731 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3732 */ 3733 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3734 hci_stack->sco_packet_handler = handler; 3735 } 3736 #endif 3737 3738 static void hci_state_reset(void){ 3739 // no connections yet 3740 hci_stack->connections = NULL; 3741 3742 // keep discoverable/connectable as this has been requested by the client(s) 3743 // hci_stack->discoverable = 0; 3744 // hci_stack->connectable = 0; 3745 // hci_stack->bondable = 1; 3746 // hci_stack->own_addr_type = 0; 3747 3748 // buffer is free 3749 hci_stack->hci_packet_buffer_reserved = false; 3750 3751 // no pending cmds 3752 hci_stack->decline_reason = 0; 3753 3754 hci_stack->secure_connections_active = false; 3755 3756 #ifdef ENABLE_CLASSIC 3757 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3758 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3759 3760 hci_stack->gap_tasks_classic = 3761 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3762 GAP_TASK_SET_CLASS_OF_DEVICE | 3763 GAP_TASK_SET_LOCAL_NAME | 3764 GAP_TASK_SET_EIR_DATA | 3765 GAP_TASK_WRITE_SCAN_ENABLE | 3766 GAP_TASK_WRITE_PAGE_TIMEOUT; 3767 #endif 3768 3769 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3770 hci_stack->classic_read_local_oob_data = false; 3771 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3772 #endif 3773 3774 // LE 3775 #ifdef ENABLE_BLE 3776 memset(hci_stack->le_random_address, 0, 6); 3777 hci_stack->le_random_address_set = 0; 3778 #endif 3779 #ifdef ENABLE_LE_CENTRAL 3780 hci_stack->le_scanning_active = false; 3781 hci_stack->le_scanning_param_update = true; 3782 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3783 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3784 hci_stack->le_whitelist_capacity = 0; 3785 #endif 3786 #ifdef ENABLE_LE_PERIPHERAL 3787 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3788 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3789 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3790 } 3791 if (hci_stack->le_advertisements_data != NULL){ 3792 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3793 } 3794 #endif 3795 } 3796 3797 #ifdef ENABLE_CLASSIC 3798 /** 3799 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3800 */ 3801 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3802 // store and open remote device db 3803 hci_stack->link_key_db = link_key_db; 3804 if (hci_stack->link_key_db) { 3805 hci_stack->link_key_db->open(); 3806 } 3807 } 3808 #endif 3809 3810 void hci_init(const hci_transport_t *transport, const void *config){ 3811 3812 #ifdef HAVE_MALLOC 3813 if (!hci_stack) { 3814 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3815 } 3816 #else 3817 hci_stack = &hci_stack_static; 3818 #endif 3819 memset(hci_stack, 0, sizeof(hci_stack_t)); 3820 3821 // reference to use transport layer implementation 3822 hci_stack->hci_transport = transport; 3823 3824 // reference to used config 3825 hci_stack->config = config; 3826 3827 // setup pointer for outgoing packet buffer 3828 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3829 3830 // max acl payload size defined in config.h 3831 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3832 3833 // register packet handlers with transport 3834 transport->register_packet_handler(&packet_handler); 3835 3836 hci_stack->state = HCI_STATE_OFF; 3837 3838 // class of device 3839 hci_stack->class_of_device = 0x007a020c; // Smartphone 3840 3841 // bondable by default 3842 hci_stack->bondable = 1; 3843 3844 #ifdef ENABLE_CLASSIC 3845 // classic name 3846 hci_stack->local_name = default_classic_name; 3847 3848 // Master slave policy 3849 hci_stack->master_slave_policy = 1; 3850 3851 // Allow Role Switch 3852 hci_stack->allow_role_switch = 1; 3853 3854 // Default / minimum security level = 2 3855 hci_stack->gap_security_level = LEVEL_2; 3856 3857 // Default Security Mode 4 3858 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3859 3860 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3861 hci_stack->gap_required_encyrption_key_size = 7; 3862 3863 // Link Supervision Timeout 3864 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3865 3866 #endif 3867 3868 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3869 hci_stack->ssp_enable = 1; 3870 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3871 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3872 hci_stack->ssp_auto_accept = 1; 3873 3874 // Secure Connections: enable (requires support from Controller) 3875 hci_stack->secure_connections_enable = true; 3876 3877 // voice setting - signed 16 bit pcm data with CVSD over the air 3878 hci_stack->sco_voice_setting = 0x60; 3879 3880 #ifdef ENABLE_LE_CENTRAL 3881 // connection parameter to use for outgoing connections 3882 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3883 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3884 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3885 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3886 hci_stack->le_connection_latency = 4; // 4 3887 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3888 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3889 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3890 3891 // default LE Scanning 3892 hci_stack->le_scan_type = 0x1; // active 3893 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3894 hci_stack->le_scan_window = 0x30; // 30 ms 3895 #endif 3896 3897 #ifdef ENABLE_LE_PERIPHERAL 3898 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3899 #endif 3900 3901 // connection parameter range used to answer connection parameter update requests in l2cap 3902 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3903 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3904 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3905 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3906 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3907 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3908 3909 hci_state_reset(); 3910 } 3911 3912 void hci_deinit(void){ 3913 btstack_run_loop_remove_timer(&hci_stack->timeout); 3914 #ifdef HAVE_MALLOC 3915 if (hci_stack) { 3916 free(hci_stack); 3917 } 3918 #endif 3919 hci_stack = NULL; 3920 3921 #ifdef ENABLE_CLASSIC 3922 disable_l2cap_timeouts = 0; 3923 #endif 3924 } 3925 3926 /** 3927 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3928 */ 3929 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3930 hci_stack->chipset = chipset_driver; 3931 3932 // reset chipset driver - init is also called on power_up 3933 if (hci_stack->chipset && hci_stack->chipset->init){ 3934 hci_stack->chipset->init(hci_stack->config); 3935 } 3936 } 3937 3938 /** 3939 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3940 */ 3941 void hci_set_control(const btstack_control_t *hardware_control){ 3942 // references to used control implementation 3943 hci_stack->control = hardware_control; 3944 // init with transport config 3945 hardware_control->init(hci_stack->config); 3946 } 3947 3948 static void hci_discard_connections(void){ 3949 btstack_linked_list_iterator_t lit; 3950 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3951 while (btstack_linked_list_iterator_has_next(&lit)){ 3952 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3953 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3954 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3955 hci_shutdown_connection(connection); 3956 } 3957 } 3958 3959 void hci_close(void){ 3960 3961 #ifdef ENABLE_CLASSIC 3962 // close remote device db 3963 if (hci_stack->link_key_db) { 3964 hci_stack->link_key_db->close(); 3965 } 3966 #endif 3967 3968 hci_discard_connections(); 3969 3970 hci_power_control(HCI_POWER_OFF); 3971 3972 #ifdef HAVE_MALLOC 3973 free(hci_stack); 3974 #endif 3975 hci_stack = NULL; 3976 } 3977 3978 #ifdef HAVE_SCO_TRANSPORT 3979 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3980 hci_stack->sco_transport = sco_transport; 3981 sco_transport->register_packet_handler(&packet_handler); 3982 } 3983 #endif 3984 3985 #ifdef ENABLE_CLASSIC 3986 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3987 // validate ranage and set 3988 if (encryption_key_size < 7) return; 3989 if (encryption_key_size > 16) return; 3990 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3991 } 3992 3993 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3994 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3995 hci_stack->gap_security_mode = security_mode; 3996 return ERROR_CODE_SUCCESS; 3997 } else { 3998 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3999 } 4000 } 4001 4002 gap_security_mode_t gap_get_security_mode(void){ 4003 return hci_stack->gap_security_mode; 4004 } 4005 4006 void gap_set_security_level(gap_security_level_t security_level){ 4007 hci_stack->gap_security_level = security_level; 4008 } 4009 4010 gap_security_level_t gap_get_security_level(void){ 4011 if (hci_stack->gap_secure_connections_only_mode){ 4012 return LEVEL_4; 4013 } 4014 return hci_stack->gap_security_level; 4015 } 4016 4017 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4018 hci_stack->gap_minimal_service_security_level = security_level; 4019 } 4020 4021 void gap_set_secure_connections_only_mode(bool enable){ 4022 hci_stack->gap_secure_connections_only_mode = enable; 4023 } 4024 4025 bool gap_get_secure_connections_only_mode(void){ 4026 return hci_stack->gap_secure_connections_only_mode; 4027 } 4028 #endif 4029 4030 #ifdef ENABLE_CLASSIC 4031 void gap_set_class_of_device(uint32_t class_of_device){ 4032 hci_stack->class_of_device = class_of_device; 4033 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4034 hci_run(); 4035 } 4036 4037 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4038 hci_stack->default_link_policy_settings = default_link_policy_settings; 4039 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4040 hci_run(); 4041 } 4042 4043 void gap_set_allow_role_switch(bool allow_role_switch){ 4044 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4045 } 4046 4047 uint8_t hci_get_allow_role_switch(void){ 4048 return hci_stack->allow_role_switch; 4049 } 4050 4051 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4052 hci_stack->link_supervision_timeout = link_supervision_timeout; 4053 } 4054 4055 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4056 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4057 } 4058 4059 uint16_t hci_automatic_flush_timeout(void){ 4060 return hci_stack->automatic_flush_timeout; 4061 } 4062 4063 void hci_disable_l2cap_timeout_check(void){ 4064 disable_l2cap_timeouts = 1; 4065 } 4066 #endif 4067 4068 #ifndef HAVE_HOST_CONTROLLER_API 4069 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4070 void hci_set_bd_addr(bd_addr_t addr){ 4071 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4072 hci_stack->custom_bd_addr_set = 1; 4073 } 4074 #endif 4075 4076 // State-Module-Driver overview 4077 // state module low-level 4078 // HCI_STATE_OFF off close 4079 // HCI_STATE_INITIALIZING, on open 4080 // HCI_STATE_WORKING, on open 4081 // HCI_STATE_HALTING, on open 4082 // HCI_STATE_SLEEPING, off/sleep close 4083 // HCI_STATE_FALLING_ASLEEP on open 4084 4085 static int hci_power_control_on(void){ 4086 4087 // power on 4088 int err = 0; 4089 if (hci_stack->control && hci_stack->control->on){ 4090 err = (*hci_stack->control->on)(); 4091 } 4092 if (err){ 4093 log_error( "POWER_ON failed"); 4094 hci_emit_hci_open_failed(); 4095 return err; 4096 } 4097 4098 // int chipset driver 4099 if (hci_stack->chipset && hci_stack->chipset->init){ 4100 hci_stack->chipset->init(hci_stack->config); 4101 } 4102 4103 // init transport 4104 if (hci_stack->hci_transport->init){ 4105 hci_stack->hci_transport->init(hci_stack->config); 4106 } 4107 4108 // open transport 4109 err = hci_stack->hci_transport->open(); 4110 if (err){ 4111 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4112 if (hci_stack->control && hci_stack->control->off){ 4113 (*hci_stack->control->off)(); 4114 } 4115 hci_emit_hci_open_failed(); 4116 return err; 4117 } 4118 return 0; 4119 } 4120 4121 static void hci_power_control_off(void){ 4122 4123 log_info("hci_power_control_off"); 4124 4125 // close low-level device 4126 hci_stack->hci_transport->close(); 4127 4128 log_info("hci_power_control_off - hci_transport closed"); 4129 4130 // power off 4131 if (hci_stack->control && hci_stack->control->off){ 4132 (*hci_stack->control->off)(); 4133 } 4134 4135 log_info("hci_power_control_off - control closed"); 4136 4137 hci_stack->state = HCI_STATE_OFF; 4138 } 4139 4140 static void hci_power_control_sleep(void){ 4141 4142 log_info("hci_power_control_sleep"); 4143 4144 #if 0 4145 // don't close serial port during sleep 4146 4147 // close low-level device 4148 hci_stack->hci_transport->close(hci_stack->config); 4149 #endif 4150 4151 // sleep mode 4152 if (hci_stack->control && hci_stack->control->sleep){ 4153 (*hci_stack->control->sleep)(); 4154 } 4155 4156 hci_stack->state = HCI_STATE_SLEEPING; 4157 } 4158 4159 static int hci_power_control_wake(void){ 4160 4161 log_info("hci_power_control_wake"); 4162 4163 // wake on 4164 if (hci_stack->control && hci_stack->control->wake){ 4165 (*hci_stack->control->wake)(); 4166 } 4167 4168 #if 0 4169 // open low-level device 4170 int err = hci_stack->hci_transport->open(hci_stack->config); 4171 if (err){ 4172 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4173 if (hci_stack->control && hci_stack->control->off){ 4174 (*hci_stack->control->off)(); 4175 } 4176 hci_emit_hci_open_failed(); 4177 return err; 4178 } 4179 #endif 4180 4181 return 0; 4182 } 4183 4184 static void hci_power_enter_initializing_state(void){ 4185 // set up state machine 4186 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4187 hci_stack->hci_packet_buffer_reserved = false; 4188 hci_stack->state = HCI_STATE_INITIALIZING; 4189 hci_stack->substate = HCI_INIT_SEND_RESET; 4190 } 4191 4192 static void hci_power_enter_halting_state(void){ 4193 #ifdef ENABLE_BLE 4194 hci_whitelist_free(); 4195 #endif 4196 // see hci_run 4197 hci_stack->state = HCI_STATE_HALTING; 4198 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4199 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4200 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4201 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4202 btstack_run_loop_add_timer(&hci_stack->timeout); 4203 } 4204 4205 // returns error 4206 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4207 int err; 4208 switch (power_mode){ 4209 case HCI_POWER_ON: 4210 err = hci_power_control_on(); 4211 if (err != 0) { 4212 log_error("hci_power_control_on() error %d", err); 4213 return err; 4214 } 4215 hci_power_enter_initializing_state(); 4216 break; 4217 case HCI_POWER_OFF: 4218 // do nothing 4219 break; 4220 case HCI_POWER_SLEEP: 4221 // do nothing (with SLEEP == OFF) 4222 break; 4223 default: 4224 btstack_assert(false); 4225 break; 4226 } 4227 return ERROR_CODE_SUCCESS; 4228 } 4229 4230 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4231 switch (power_mode){ 4232 case HCI_POWER_ON: 4233 // do nothing 4234 break; 4235 case HCI_POWER_OFF: 4236 // no connections yet, just turn it off 4237 hci_power_control_off(); 4238 break; 4239 case HCI_POWER_SLEEP: 4240 // no connections yet, just turn it off 4241 hci_power_control_sleep(); 4242 break; 4243 default: 4244 btstack_assert(false); 4245 break; 4246 } 4247 return ERROR_CODE_SUCCESS; 4248 } 4249 4250 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4251 switch (power_mode){ 4252 case HCI_POWER_ON: 4253 // do nothing 4254 break; 4255 case HCI_POWER_OFF: 4256 hci_power_enter_halting_state(); 4257 break; 4258 case HCI_POWER_SLEEP: 4259 // see hci_run 4260 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4261 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4262 break; 4263 default: 4264 btstack_assert(false); 4265 break; 4266 } 4267 return ERROR_CODE_SUCCESS; 4268 } 4269 4270 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4271 switch (power_mode){ 4272 case HCI_POWER_ON: 4273 hci_power_enter_initializing_state(); 4274 break; 4275 case HCI_POWER_OFF: 4276 // do nothing 4277 break; 4278 case HCI_POWER_SLEEP: 4279 // see hci_run 4280 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4281 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4282 break; 4283 default: 4284 btstack_assert(false); 4285 break; 4286 } 4287 return ERROR_CODE_SUCCESS; 4288 } 4289 4290 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4291 switch (power_mode){ 4292 case HCI_POWER_ON: 4293 hci_power_enter_initializing_state(); 4294 break; 4295 case HCI_POWER_OFF: 4296 hci_power_enter_halting_state(); 4297 break; 4298 case HCI_POWER_SLEEP: 4299 // do nothing 4300 break; 4301 default: 4302 btstack_assert(false); 4303 break; 4304 } 4305 return ERROR_CODE_SUCCESS; 4306 } 4307 4308 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4309 int err; 4310 switch (power_mode){ 4311 case HCI_POWER_ON: 4312 err = hci_power_control_wake(); 4313 if (err) return err; 4314 hci_power_enter_initializing_state(); 4315 break; 4316 case HCI_POWER_OFF: 4317 hci_power_enter_halting_state(); 4318 break; 4319 case HCI_POWER_SLEEP: 4320 // do nothing 4321 break; 4322 default: 4323 btstack_assert(false); 4324 break; 4325 } 4326 return ERROR_CODE_SUCCESS; 4327 } 4328 4329 int hci_power_control(HCI_POWER_MODE power_mode){ 4330 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4331 int err = 0; 4332 switch (hci_stack->state){ 4333 case HCI_STATE_OFF: 4334 err = hci_power_control_state_off(power_mode); 4335 break; 4336 case HCI_STATE_INITIALIZING: 4337 err = hci_power_control_state_initializing(power_mode); 4338 break; 4339 case HCI_STATE_WORKING: 4340 err = hci_power_control_state_working(power_mode); 4341 break; 4342 case HCI_STATE_HALTING: 4343 err = hci_power_control_state_halting(power_mode); 4344 break; 4345 case HCI_STATE_FALLING_ASLEEP: 4346 err = hci_power_control_state_falling_asleep(power_mode); 4347 break; 4348 case HCI_STATE_SLEEPING: 4349 err = hci_power_control_state_sleeping(power_mode); 4350 break; 4351 default: 4352 btstack_assert(false); 4353 break; 4354 } 4355 if (err != 0){ 4356 return err; 4357 } 4358 4359 // create internal event 4360 hci_emit_state(); 4361 4362 // trigger next/first action 4363 hci_run(); 4364 4365 return 0; 4366 } 4367 4368 4369 static void hci_halting_run(void) { 4370 4371 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4372 4373 hci_connection_t *connection; 4374 #ifdef ENABLE_BLE 4375 #ifdef ENABLE_LE_PERIPHERAL 4376 bool stop_advertismenets; 4377 #endif 4378 #endif 4379 4380 switch (hci_stack->substate) { 4381 case HCI_HALTING_CLASSIC_STOP: 4382 #ifdef ENABLE_CLASSIC 4383 if (!hci_can_send_command_packet_now()) return; 4384 4385 if (hci_stack->connectable || hci_stack->discoverable){ 4386 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4387 hci_send_cmd(&hci_write_scan_enable, 0); 4388 return; 4389 } 4390 #endif 4391 /* fall through */ 4392 4393 case HCI_HALTING_LE_ADV_STOP: 4394 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4395 4396 #ifdef ENABLE_BLE 4397 #ifdef ENABLE_LE_PERIPHERAL 4398 if (!hci_can_send_command_packet_now()) return; 4399 4400 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4401 4402 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4403 if (hci_extended_advertising_supported()){ 4404 btstack_linked_list_iterator_t it; 4405 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4406 // stop all periodic advertisements and check if an extended set is active 4407 while (btstack_linked_list_iterator_has_next(&it)){ 4408 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4409 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4410 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4411 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4412 return; 4413 } 4414 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4415 stop_advertismenets = true; 4416 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4417 } 4418 } 4419 if (stop_advertismenets){ 4420 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4421 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4422 return; 4423 } 4424 } 4425 else 4426 #else 4427 { 4428 if (stop_advertismenets) { 4429 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4430 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4431 return; 4432 } 4433 } 4434 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4435 #endif /* ENABLE_LE_PERIPHERAL */ 4436 #endif /* ENABLE_BLE */ 4437 4438 /* fall through */ 4439 4440 case HCI_HALTING_LE_SCAN_STOP: 4441 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4442 if (!hci_can_send_command_packet_now()) return; 4443 4444 #ifdef ENABLE_BLE 4445 #ifdef ENABLE_LE_CENTRAL 4446 if (hci_stack->le_scanning_active){ 4447 hci_le_scan_stop(); 4448 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4449 return; 4450 } 4451 #endif 4452 #endif 4453 4454 /* fall through */ 4455 4456 case HCI_HALTING_DISCONNECT_ALL: 4457 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4458 if (!hci_can_send_command_packet_now()) return; 4459 4460 // close all open connections 4461 connection = (hci_connection_t *) hci_stack->connections; 4462 if (connection) { 4463 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4464 4465 // check state 4466 if (connection->state == SENT_DISCONNECT) return; 4467 connection->state = SENT_DISCONNECT; 4468 4469 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4470 4471 // finally, send the disconnect command 4472 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4473 return; 4474 } 4475 4476 btstack_run_loop_remove_timer(&hci_stack->timeout); 4477 4478 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4479 4480 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4481 log_info("HCI_STATE_HALTING: wait 50 ms"); 4482 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4483 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4484 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4485 btstack_run_loop_add_timer(&hci_stack->timeout); 4486 break; 4487 4488 case HCI_HALTING_CLOSE: 4489 // close left over connections (that had not been properly closed before) 4490 hci_discard_connections(); 4491 4492 log_info("HCI_STATE_HALTING, calling off"); 4493 4494 // switch mode 4495 hci_power_control_off(); 4496 4497 log_info("HCI_STATE_HALTING, emitting state"); 4498 hci_emit_state(); 4499 log_info("HCI_STATE_HALTING, done"); 4500 break; 4501 4502 case HCI_HALTING_W4_CLOSE_TIMER: 4503 // keep waiting 4504 4505 break; 4506 default: 4507 break; 4508 } 4509 }; 4510 4511 static void hci_falling_asleep_run(void){ 4512 hci_connection_t * connection; 4513 switch(hci_stack->substate) { 4514 case HCI_FALLING_ASLEEP_DISCONNECT: 4515 log_info("HCI_STATE_FALLING_ASLEEP"); 4516 // close all open connections 4517 connection = (hci_connection_t *) hci_stack->connections; 4518 if (connection){ 4519 4520 // send disconnect 4521 if (!hci_can_send_command_packet_now()) return; 4522 4523 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4524 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4525 4526 // send disconnected event right away - causes higher layer connections to get closed, too. 4527 hci_shutdown_connection(connection); 4528 return; 4529 } 4530 4531 if (hci_classic_supported()){ 4532 // disable page and inquiry scan 4533 if (!hci_can_send_command_packet_now()) return; 4534 4535 log_info("HCI_STATE_HALTING, disabling inq scans"); 4536 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4537 4538 // continue in next sub state 4539 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4540 break; 4541 } 4542 4543 /* fall through */ 4544 4545 case HCI_FALLING_ASLEEP_COMPLETE: 4546 log_info("HCI_STATE_HALTING, calling sleep"); 4547 // switch mode 4548 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4549 hci_emit_state(); 4550 break; 4551 4552 default: 4553 break; 4554 } 4555 } 4556 4557 #ifdef ENABLE_CLASSIC 4558 4559 static void hci_update_scan_enable(void){ 4560 // 2 = page scan, 1 = inq scan 4561 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4562 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4563 hci_run(); 4564 } 4565 4566 void gap_discoverable_control(uint8_t enable){ 4567 if (enable) enable = 1; // normalize argument 4568 4569 if (hci_stack->discoverable == enable){ 4570 hci_emit_discoverable_enabled(hci_stack->discoverable); 4571 return; 4572 } 4573 4574 hci_stack->discoverable = enable; 4575 hci_update_scan_enable(); 4576 } 4577 4578 void gap_connectable_control(uint8_t enable){ 4579 if (enable) enable = 1; // normalize argument 4580 4581 // don't emit event 4582 if (hci_stack->connectable == enable) return; 4583 4584 hci_stack->connectable = enable; 4585 hci_update_scan_enable(); 4586 } 4587 #endif 4588 4589 void gap_local_bd_addr(bd_addr_t address_buffer){ 4590 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4591 } 4592 4593 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4594 static void hci_host_num_completed_packets(void){ 4595 4596 // create packet manually as arrays are not supported and num_commands should not get reduced 4597 hci_reserve_packet_buffer(); 4598 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4599 4600 uint16_t size = 0; 4601 uint16_t num_handles = 0; 4602 packet[size++] = 0x35; 4603 packet[size++] = 0x0c; 4604 size++; // skip param len 4605 size++; // skip num handles 4606 4607 // add { handle, packets } entries 4608 btstack_linked_item_t * it; 4609 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4610 hci_connection_t * connection = (hci_connection_t *) it; 4611 if (connection->num_packets_completed){ 4612 little_endian_store_16(packet, size, connection->con_handle); 4613 size += 2; 4614 little_endian_store_16(packet, size, connection->num_packets_completed); 4615 size += 2; 4616 // 4617 num_handles++; 4618 connection->num_packets_completed = 0; 4619 } 4620 } 4621 4622 packet[2] = size - 3; 4623 packet[3] = num_handles; 4624 4625 hci_stack->host_completed_packets = 0; 4626 4627 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4628 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4629 4630 // release packet buffer for synchronous transport implementations 4631 if (hci_transport_synchronous()){ 4632 hci_release_packet_buffer(); 4633 hci_emit_transport_packet_sent(); 4634 } 4635 } 4636 #endif 4637 4638 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4639 UNUSED(ds); 4640 hci_stack->substate = HCI_HALTING_CLOSE; 4641 // allow packet handlers to defer final shutdown 4642 hci_emit_state(); 4643 hci_run(); 4644 } 4645 4646 static bool hci_run_acl_fragments(void){ 4647 if (hci_stack->acl_fragmentation_total_size > 0u) { 4648 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4649 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4650 if (connection) { 4651 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4652 hci_send_acl_packet_fragments(connection); 4653 return true; 4654 } 4655 } else { 4656 // connection gone -> discard further fragments 4657 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4658 hci_stack->acl_fragmentation_total_size = 0; 4659 hci_stack->acl_fragmentation_pos = 0; 4660 } 4661 } 4662 return false; 4663 } 4664 4665 #ifdef ENABLE_CLASSIC 4666 4667 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4668 static bool hci_classic_operation_active(void) { 4669 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4670 return true; 4671 } 4672 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4673 return true; 4674 } 4675 btstack_linked_item_t * it; 4676 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4677 hci_connection_t *connection = (hci_connection_t *) it; 4678 switch (connection->state) { 4679 case SENT_CREATE_CONNECTION: 4680 case SENT_CANCEL_CONNECTION: 4681 case SENT_DISCONNECT: 4682 return true; 4683 default: 4684 break; 4685 } 4686 } 4687 return false; 4688 } 4689 #endif 4690 4691 static bool hci_run_general_gap_classic(void){ 4692 4693 // assert stack is working and classic is active 4694 if (hci_classic_supported() == false) return false; 4695 if (hci_stack->state != HCI_STATE_WORKING) return false; 4696 4697 // decline incoming connections 4698 if (hci_stack->decline_reason){ 4699 uint8_t reason = hci_stack->decline_reason; 4700 hci_stack->decline_reason = 0; 4701 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4702 return true; 4703 } 4704 4705 if (hci_stack->gap_tasks_classic != 0){ 4706 hci_run_gap_tasks_classic(); 4707 return true; 4708 } 4709 4710 // start/stop inquiry 4711 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4712 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4713 if (hci_classic_operation_active() == false) 4714 #endif 4715 { 4716 uint8_t duration = hci_stack->inquiry_state; 4717 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4718 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4719 return true; 4720 } 4721 } 4722 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4723 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4724 hci_send_cmd(&hci_inquiry_cancel); 4725 return true; 4726 } 4727 // remote name request 4728 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4729 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4730 if (hci_classic_operation_active() == false) 4731 #endif 4732 { 4733 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4734 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4735 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4736 return true; 4737 } 4738 } 4739 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4740 // Local OOB data 4741 if (hci_stack->classic_read_local_oob_data){ 4742 hci_stack->classic_read_local_oob_data = false; 4743 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4744 hci_send_cmd(&hci_read_local_extended_oob_data); 4745 } else { 4746 hci_send_cmd(&hci_read_local_oob_data); 4747 } 4748 } 4749 #endif 4750 // pairing 4751 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4752 uint8_t state = hci_stack->gap_pairing_state; 4753 uint8_t pin_code[16]; 4754 switch (state){ 4755 case GAP_PAIRING_STATE_SEND_PIN: 4756 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4757 memset(pin_code, 0, 16); 4758 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4759 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4760 break; 4761 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4762 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4763 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4764 break; 4765 case GAP_PAIRING_STATE_SEND_PASSKEY: 4766 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4767 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4768 break; 4769 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4770 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4771 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4772 break; 4773 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4774 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4775 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4776 break; 4777 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4778 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4779 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4780 break; 4781 default: 4782 break; 4783 } 4784 return true; 4785 } 4786 return false; 4787 } 4788 #endif 4789 4790 #ifdef ENABLE_BLE 4791 4792 #ifdef ENABLE_LE_CENTRAL 4793 static void hci_le_scan_stop(void){ 4794 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4795 if (hci_extended_advertising_supported()) { 4796 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4797 } else 4798 #endif 4799 { 4800 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4801 } 4802 } 4803 #endif 4804 4805 #ifdef ENABLE_LE_PERIPHERAL 4806 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4807 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4808 uint8_t operation = 0; 4809 if (pos == 0){ 4810 // first fragment or complete data 4811 operation |= 1; 4812 } 4813 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4814 // last fragment or complete data 4815 operation |= 2; 4816 } 4817 return operation; 4818 } 4819 #endif 4820 #endif 4821 4822 static bool hci_run_general_gap_le(void){ 4823 4824 // Phase 1: collect what to stop 4825 4826 bool scanning_stop = false; 4827 bool connecting_stop = false; 4828 bool advertising_stop = false; 4829 4830 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4831 le_advertising_set_t * advertising_stop_set = NULL; 4832 bool periodic_stop = false; 4833 #endif 4834 4835 #ifndef ENABLE_LE_CENTRAL 4836 UNUSED(scanning_stop); 4837 UNUSED(connecting_stop); 4838 #endif 4839 #ifndef ENABLE_LE_PERIPHERAL 4840 UNUSED(advertising_stop); 4841 #endif 4842 4843 // check if own address changes 4844 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4845 4846 // check if whitelist needs modification 4847 bool whitelist_modification_pending = false; 4848 btstack_linked_list_iterator_t lit; 4849 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4850 while (btstack_linked_list_iterator_has_next(&lit)){ 4851 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4852 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4853 whitelist_modification_pending = true; 4854 break; 4855 } 4856 } 4857 // check if resolving list needs modification 4858 bool resolving_list_modification_pending = false; 4859 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4860 4861 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4862 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4863 resolving_list_modification_pending = true; 4864 } 4865 #endif 4866 4867 #ifdef ENABLE_LE_CENTRAL 4868 // scanning control 4869 if (hci_stack->le_scanning_active) { 4870 // stop if: 4871 // - parameter change required 4872 // - it's disabled 4873 // - whitelist change required but used for scanning 4874 // - resolving list modified 4875 // - own address changes 4876 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4877 if ((hci_stack->le_scanning_param_update) || 4878 !hci_stack->le_scanning_enabled || 4879 (scanning_uses_whitelist && whitelist_modification_pending) || 4880 resolving_list_modification_pending || 4881 random_address_change){ 4882 4883 scanning_stop = true; 4884 } 4885 } 4886 #endif 4887 4888 #ifdef ENABLE_LE_CENTRAL 4889 // connecting control 4890 bool connecting_with_whitelist; 4891 switch (hci_stack->le_connecting_state){ 4892 case LE_CONNECTING_DIRECT: 4893 case LE_CONNECTING_WHITELIST: 4894 // stop connecting if: 4895 // - connecting uses white and whitelist modification pending 4896 // - if it got disabled 4897 // - resolving list modified 4898 // - own address changes 4899 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4900 if ((connecting_with_whitelist && whitelist_modification_pending) || 4901 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4902 resolving_list_modification_pending || 4903 random_address_change) { 4904 4905 connecting_stop = true; 4906 } 4907 break; 4908 default: 4909 break; 4910 } 4911 #endif 4912 4913 #ifdef ENABLE_LE_PERIPHERAL 4914 // le advertisement control 4915 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4916 // stop if: 4917 // - parameter change required 4918 // - random address used in advertising and changes 4919 // - it's disabled 4920 // - whitelist change required but used for advertisement filter policy 4921 // - resolving list modified 4922 // - own address changes 4923 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4924 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4925 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4926 if (advertising_change || 4927 (advertising_uses_random_address && random_address_change) || 4928 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4929 (advertising_uses_whitelist && whitelist_modification_pending) || 4930 resolving_list_modification_pending || 4931 random_address_change) { 4932 4933 advertising_stop = true; 4934 } 4935 } 4936 4937 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4938 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4939 btstack_linked_list_iterator_t it; 4940 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4941 while (btstack_linked_list_iterator_has_next(&it)){ 4942 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4943 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4944 // stop if: 4945 // - parameter change required 4946 // - random address used in connectable advertising and changes 4947 // - it's disabled 4948 // - whitelist change required but used for advertisement filter policy 4949 // - resolving list modified 4950 // - own address changes 4951 // - advertisement set will be removed 4952 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4953 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4954 bool advertising_uses_random_address = 4955 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 4956 advertising_connectable; 4957 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4958 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4959 bool advertising_set_random_address_change = 4960 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4961 bool advertising_set_will_be_removed = 4962 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4963 if (advertising_parameter_change || 4964 (advertising_uses_random_address && advertising_set_random_address_change) || 4965 (advertising_enabled == false) || 4966 (advertising_uses_whitelist && whitelist_modification_pending) || 4967 resolving_list_modification_pending || 4968 advertising_set_will_be_removed) { 4969 4970 advertising_stop = true; 4971 advertising_stop_set = advertising_set; 4972 break; 4973 } 4974 } 4975 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4976 // stop if: 4977 // - it's disabled 4978 // - parameter change required 4979 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 4980 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 4981 if ((periodic_enabled == false) || periodic_parameter_change){ 4982 periodic_stop = true; 4983 advertising_stop_set = advertising_set; 4984 } 4985 } 4986 } 4987 } 4988 #endif 4989 4990 #endif 4991 4992 4993 // Phase 2: stop everything that should be off during modifications 4994 4995 #ifdef ENABLE_LE_CENTRAL 4996 if (scanning_stop){ 4997 hci_stack->le_scanning_active = false; 4998 hci_le_scan_stop(); 4999 return true; 5000 } 5001 #endif 5002 5003 #ifdef ENABLE_LE_CENTRAL 5004 if (connecting_stop){ 5005 hci_send_cmd(&hci_le_create_connection_cancel); 5006 return true; 5007 } 5008 #endif 5009 5010 #ifdef ENABLE_LE_PERIPHERAL 5011 if (advertising_stop){ 5012 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5013 if (hci_extended_advertising_supported()) { 5014 uint8_t advertising_stop_handle; 5015 if (advertising_stop_set != NULL){ 5016 advertising_stop_handle = advertising_stop_set->advertising_handle; 5017 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5018 } else { 5019 advertising_stop_handle = 0; 5020 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5021 } 5022 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5023 const uint16_t durations[] = { 0 }; 5024 const uint16_t max_events[] = { 0 }; 5025 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5026 } else 5027 #endif 5028 { 5029 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5030 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5031 } 5032 return true; 5033 } 5034 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5035 if (periodic_stop){ 5036 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5037 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5038 return true; 5039 } 5040 #endif 5041 #endif 5042 5043 // Phase 3: modify 5044 5045 if (random_address_change){ 5046 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5047 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5048 if (hci_extended_advertising_supported()) { 5049 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5050 } 5051 #endif 5052 { 5053 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5054 } 5055 return true; 5056 } 5057 5058 #ifdef ENABLE_LE_CENTRAL 5059 if (hci_stack->le_scanning_param_update){ 5060 hci_stack->le_scanning_param_update = false; 5061 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5062 if (hci_extended_advertising_supported()){ 5063 // prepare arrays for all PHYs 5064 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5065 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5066 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5067 uint8_t scanning_phys = 1; // LE 1M PHY 5068 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5069 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5070 } else 5071 #endif 5072 { 5073 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5074 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5075 } 5076 return true; 5077 } 5078 #endif 5079 5080 #ifdef ENABLE_LE_PERIPHERAL 5081 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5082 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5083 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5084 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5085 if (hci_extended_advertising_supported()){ 5086 // map advertisment type to advertising event properties 5087 uint16_t adv_event_properties = 0; 5088 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5089 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5090 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5091 } 5092 hci_stack->le_advertising_set_in_current_command = 0; 5093 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5094 0, 5095 adv_event_properties, 5096 hci_stack->le_advertisements_interval_min, 5097 hci_stack->le_advertisements_interval_max, 5098 hci_stack->le_advertisements_channel_map, 5099 hci_stack->le_advertisements_own_addr_type, 5100 hci_stack->le_advertisements_direct_address_type, 5101 hci_stack->le_advertisements_direct_address, 5102 hci_stack->le_advertisements_filter_policy, 5103 0x7f, // tx power: no preference 5104 0x01, // primary adv phy: LE 1M 5105 0, // secondary adv max skip 5106 0, // secondary adv phy 5107 0, // adv sid 5108 0 // scan request notification 5109 ); 5110 } 5111 #endif 5112 { 5113 hci_send_cmd(&hci_le_set_advertising_parameters, 5114 hci_stack->le_advertisements_interval_min, 5115 hci_stack->le_advertisements_interval_max, 5116 hci_stack->le_advertisements_type, 5117 hci_stack->le_advertisements_own_addr_type, 5118 hci_stack->le_advertisements_direct_address_type, 5119 hci_stack->le_advertisements_direct_address, 5120 hci_stack->le_advertisements_channel_map, 5121 hci_stack->le_advertisements_filter_policy); 5122 } 5123 return true; 5124 } 5125 5126 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5127 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5128 uint8_t adv_data_clean[31]; 5129 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5130 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5131 hci_stack->le_advertisements_data_len); 5132 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5133 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5134 if (hci_extended_advertising_supported()){ 5135 hci_stack->le_advertising_set_in_current_command = 0; 5136 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5137 } else 5138 #endif 5139 { 5140 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5141 } 5142 return true; 5143 } 5144 5145 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5146 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5147 uint8_t scan_data_clean[31]; 5148 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5149 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5150 hci_stack->le_scan_response_data_len); 5151 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5152 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5153 if (hci_extended_advertising_supported()){ 5154 hci_stack->le_advertising_set_in_current_command = 0; 5155 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5156 } else 5157 #endif 5158 { 5159 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5160 } 5161 return true; 5162 } 5163 5164 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5165 if (hci_extended_advertising_supported()) { 5166 btstack_linked_list_iterator_t it; 5167 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5168 while (btstack_linked_list_iterator_has_next(&it)){ 5169 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5170 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5171 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5172 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5173 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5174 return true; 5175 } 5176 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5177 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5178 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5179 return true; 5180 } 5181 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5182 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5183 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5184 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5185 advertising_set->advertising_handle, 5186 advertising_set->extended_params.advertising_event_properties, 5187 advertising_set->extended_params.primary_advertising_interval_min, 5188 advertising_set->extended_params.primary_advertising_interval_max, 5189 advertising_set->extended_params.primary_advertising_channel_map, 5190 advertising_set->extended_params.own_address_type, 5191 advertising_set->extended_params.peer_address_type, 5192 advertising_set->extended_params.peer_address, 5193 advertising_set->extended_params.advertising_filter_policy, 5194 advertising_set->extended_params.advertising_tx_power, 5195 advertising_set->extended_params.primary_advertising_phy, 5196 advertising_set->extended_params.secondary_advertising_max_skip, 5197 advertising_set->extended_params.secondary_advertising_phy, 5198 advertising_set->extended_params.advertising_sid, 5199 advertising_set->extended_params.scan_request_notification_enable 5200 ); 5201 return true; 5202 } 5203 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5204 uint16_t pos = advertising_set->adv_data_pos; 5205 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5206 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5207 if ((operation & 0x02) != 0){ 5208 // last fragment or complete data 5209 operation |= 2; 5210 advertising_set->adv_data_pos = 0; 5211 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5212 } else { 5213 advertising_set->adv_data_pos += data_to_upload; 5214 } 5215 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5216 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5217 return true; 5218 } 5219 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5220 uint16_t pos = advertising_set->scan_data_pos; 5221 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5222 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5223 if ((operation & 0x02) != 0){ 5224 advertising_set->scan_data_pos = 0; 5225 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5226 } else { 5227 advertising_set->scan_data_pos += data_to_upload; 5228 } 5229 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5230 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5231 return true; 5232 } 5233 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5234 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5235 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5236 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5237 advertising_set->advertising_handle, 5238 advertising_set->periodic_params.periodic_advertising_interval_min, 5239 advertising_set->periodic_params.periodic_advertising_interval_max, 5240 advertising_set->periodic_params.periodic_advertising_properties); 5241 return true; 5242 } 5243 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5244 uint16_t pos = advertising_set->periodic_data_pos; 5245 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5246 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5247 if ((operation & 0x02) != 0){ 5248 // last fragment or complete data 5249 operation |= 2; 5250 advertising_set->periodic_data_pos = 0; 5251 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5252 } else { 5253 advertising_set->periodic_data_pos += data_to_upload; 5254 } 5255 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5256 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5257 return true; 5258 } 5259 } 5260 } 5261 #endif 5262 5263 5264 #endif 5265 5266 5267 #ifdef ENABLE_LE_CENTRAL 5268 // if connect with whitelist was active and is not cancelled yet, wait until next time 5269 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5270 #endif 5271 5272 // LE Whitelist Management 5273 if (whitelist_modification_pending){ 5274 // add/remove entries 5275 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5276 while (btstack_linked_list_iterator_has_next(&lit)){ 5277 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5278 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5279 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5280 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5281 return true; 5282 } 5283 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5284 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5285 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5286 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5287 return true; 5288 } 5289 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5290 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5291 btstack_memory_whitelist_entry_free(entry); 5292 } 5293 } 5294 } 5295 5296 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5297 // LE Resolving List Management 5298 if (resolving_list_supported) { 5299 uint16_t i; 5300 switch (hci_stack->le_resolving_list_state) { 5301 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5302 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5303 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5304 return true; 5305 case LE_RESOLVING_LIST_READ_SIZE: 5306 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5307 hci_send_cmd(&hci_le_read_resolving_list_size); 5308 return true; 5309 case LE_RESOLVING_LIST_SEND_CLEAR: 5310 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5311 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5312 sizeof(hci_stack->le_resolving_list_add_entries)); 5313 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5314 sizeof(hci_stack->le_resolving_list_remove_entries)); 5315 hci_send_cmd(&hci_le_clear_resolving_list); 5316 return true; 5317 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5318 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5319 uint8_t offset = i >> 3; 5320 uint8_t mask = 1 << (i & 7); 5321 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5322 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5323 bd_addr_t peer_identity_addreses; 5324 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5325 sm_key_t peer_irk; 5326 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5327 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5328 5329 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5330 // trigger whitelist entry 'update' (work around for controller bug) 5331 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5332 while (btstack_linked_list_iterator_has_next(&lit)) { 5333 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5334 if (entry->address_type != peer_identity_addr_type) continue; 5335 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5336 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5337 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5338 } 5339 #endif 5340 5341 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5342 peer_identity_addreses); 5343 return true; 5344 } 5345 5346 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5347 5348 /* fall through */ 5349 5350 case LE_RESOLVING_LIST_ADD_ENTRIES: 5351 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5352 uint8_t offset = i >> 3; 5353 uint8_t mask = 1 << (i & 7); 5354 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5355 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5356 bd_addr_t peer_identity_addreses; 5357 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5358 sm_key_t peer_irk; 5359 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5360 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5361 const uint8_t *local_irk = gap_get_persistent_irk(); 5362 // command uses format specifier 'P' that stores 16-byte value without flip 5363 uint8_t local_irk_flipped[16]; 5364 uint8_t peer_irk_flipped[16]; 5365 reverse_128(local_irk, local_irk_flipped); 5366 reverse_128(peer_irk, peer_irk_flipped); 5367 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5368 peer_irk_flipped, local_irk_flipped); 5369 return true; 5370 } 5371 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5372 break; 5373 5374 default: 5375 break; 5376 } 5377 } 5378 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5379 #endif 5380 5381 // post-pone all actions until stack is fully working 5382 if (hci_stack->state != HCI_STATE_WORKING) return false; 5383 5384 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5385 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5386 5387 // Phase 4: restore state 5388 5389 #ifdef ENABLE_LE_CENTRAL 5390 // re-start scanning 5391 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5392 hci_stack->le_scanning_active = true; 5393 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5394 if (hci_extended_advertising_supported()){ 5395 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5396 } else 5397 #endif 5398 { 5399 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5400 } 5401 return true; 5402 } 5403 #endif 5404 5405 #ifdef ENABLE_LE_CENTRAL 5406 // re-start connecting 5407 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5408 bd_addr_t null_addr; 5409 memset(null_addr, 0, 6); 5410 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5411 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5412 hci_send_cmd(&hci_le_create_connection, 5413 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5414 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5415 1, // use whitelist 5416 0, // peer address type 5417 null_addr, // peer bd addr 5418 hci_stack->le_connection_own_addr_type, // our addr type: 5419 hci_stack->le_connection_interval_min, // conn interval min 5420 hci_stack->le_connection_interval_max, // conn interval max 5421 hci_stack->le_connection_latency, // conn latency 5422 hci_stack->le_supervision_timeout, // conn latency 5423 hci_stack->le_minimum_ce_length, // min ce length 5424 hci_stack->le_maximum_ce_length // max ce length 5425 ); 5426 return true; 5427 } 5428 #endif 5429 5430 #ifdef ENABLE_LE_PERIPHERAL 5431 // re-start advertising 5432 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5433 // check if advertisements should be enabled given 5434 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5435 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5436 5437 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5438 if (hci_extended_advertising_supported()){ 5439 const uint8_t advertising_handles[] = { 0 }; 5440 const uint16_t durations[] = { 0 }; 5441 const uint16_t max_events[] = { 0 }; 5442 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5443 } else 5444 #endif 5445 { 5446 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5447 } 5448 return true; 5449 } 5450 5451 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5452 if (hci_extended_advertising_supported()) { 5453 btstack_linked_list_iterator_t it; 5454 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5455 while (btstack_linked_list_iterator_has_next(&it)) { 5456 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5457 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5458 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5459 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5460 const uint16_t durations[] = { advertising_set->enable_timeout }; 5461 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5462 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5463 return true; 5464 } 5465 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5466 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5467 uint8_t enable = 1; 5468 if (advertising_set->periodic_include_adi){ 5469 enable |= 2; 5470 } 5471 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5472 return true; 5473 } 5474 } 5475 } 5476 #endif 5477 #endif 5478 5479 return false; 5480 } 5481 #endif 5482 5483 static bool hci_run_general_pending_commands(void){ 5484 btstack_linked_item_t * it; 5485 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5486 hci_connection_t * connection = (hci_connection_t *) it; 5487 5488 switch(connection->state){ 5489 case SEND_CREATE_CONNECTION: 5490 switch(connection->address_type){ 5491 #ifdef ENABLE_CLASSIC 5492 case BD_ADDR_TYPE_ACL: 5493 log_info("sending hci_create_connection"); 5494 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5495 break; 5496 #endif 5497 default: 5498 #ifdef ENABLE_BLE 5499 #ifdef ENABLE_LE_CENTRAL 5500 log_info("sending hci_le_create_connection"); 5501 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5502 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5503 hci_send_cmd(&hci_le_create_connection, 5504 hci_stack->le_connection_scan_interval, // conn scan interval 5505 hci_stack->le_connection_scan_window, // conn scan windows 5506 0, // don't use whitelist 5507 connection->address_type, // peer address type 5508 connection->address, // peer bd addr 5509 hci_stack->le_connection_own_addr_type, // our addr type: 5510 hci_stack->le_connection_interval_min, // conn interval min 5511 hci_stack->le_connection_interval_max, // conn interval max 5512 hci_stack->le_connection_latency, // conn latency 5513 hci_stack->le_supervision_timeout, // conn latency 5514 hci_stack->le_minimum_ce_length, // min ce length 5515 hci_stack->le_maximum_ce_length // max ce length 5516 ); 5517 connection->state = SENT_CREATE_CONNECTION; 5518 #endif 5519 #endif 5520 break; 5521 } 5522 return true; 5523 5524 #ifdef ENABLE_CLASSIC 5525 case RECEIVED_CONNECTION_REQUEST: 5526 connection->role = HCI_ROLE_SLAVE; 5527 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5528 log_info("sending hci_accept_connection_request"); 5529 connection->state = ACCEPTED_CONNECTION_REQUEST; 5530 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5531 return true; 5532 } 5533 break; 5534 #endif 5535 5536 #ifdef ENABLE_BLE 5537 #ifdef ENABLE_LE_CENTRAL 5538 case SEND_CANCEL_CONNECTION: 5539 connection->state = SENT_CANCEL_CONNECTION; 5540 hci_send_cmd(&hci_le_create_connection_cancel); 5541 return true; 5542 #endif 5543 #endif 5544 case SEND_DISCONNECT: 5545 connection->state = SENT_DISCONNECT; 5546 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5547 return true; 5548 5549 default: 5550 break; 5551 } 5552 5553 // no further commands if connection is about to get shut down 5554 if (connection->state == SENT_DISCONNECT) continue; 5555 5556 #ifdef ENABLE_CLASSIC 5557 5558 // Handling link key request requires remote supported features 5559 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5560 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5561 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5562 5563 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5564 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5565 if (have_link_key && security_level_sufficient){ 5566 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5567 } else { 5568 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5569 } 5570 return true; 5571 } 5572 5573 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5574 log_info("denying to pin request"); 5575 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5576 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5577 return true; 5578 } 5579 5580 // security assessment requires remote features 5581 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5582 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5583 hci_ssp_assess_security_on_io_cap_request(connection); 5584 // 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 5585 } 5586 5587 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5588 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5589 // set authentication requirements: 5590 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5591 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5592 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5593 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5594 authreq |= 1; 5595 } 5596 bool bonding = hci_stack->bondable; 5597 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5598 // if we have received IO Cap Response, we're in responder role 5599 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5600 if (bonding && !remote_bonding){ 5601 log_info("Remote not bonding, dropping local flag"); 5602 bonding = false; 5603 } 5604 } 5605 if (bonding){ 5606 if (connection->bonding_flags & BONDING_DEDICATED){ 5607 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5608 } else { 5609 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5610 } 5611 } 5612 uint8_t have_oob_data = 0; 5613 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5614 if (connection->classic_oob_c_192 != NULL){ 5615 have_oob_data |= 1; 5616 } 5617 if (connection->classic_oob_c_256 != NULL){ 5618 have_oob_data |= 2; 5619 } 5620 #endif 5621 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5622 return true; 5623 } 5624 5625 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5626 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5627 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5628 return true; 5629 } 5630 5631 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5632 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5633 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5634 const uint8_t zero[16] = { 0 }; 5635 const uint8_t * r_192 = zero; 5636 const uint8_t * c_192 = zero; 5637 const uint8_t * r_256 = zero; 5638 const uint8_t * c_256 = zero; 5639 // verify P-256 OOB 5640 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5641 c_256 = connection->classic_oob_c_256; 5642 if (connection->classic_oob_r_256 != NULL) { 5643 r_256 = connection->classic_oob_r_256; 5644 } 5645 } 5646 // verify P-192 OOB 5647 if ((connection->classic_oob_c_192 != NULL)) { 5648 c_192 = connection->classic_oob_c_192; 5649 if (connection->classic_oob_r_192 != NULL) { 5650 r_192 = connection->classic_oob_r_192; 5651 } 5652 } 5653 5654 // assess security 5655 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5656 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5657 if (need_level_4 && !can_reach_level_4){ 5658 log_info("Level 4 required, but not possible -> abort"); 5659 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5660 // send oob negative reply 5661 c_256 = NULL; 5662 c_192 = NULL; 5663 } 5664 5665 // Reply 5666 if (c_256 != zero) { 5667 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5668 } else if (c_192 != zero){ 5669 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5670 } else { 5671 hci_stack->classic_oob_con_handle = connection->con_handle; 5672 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5673 } 5674 return true; 5675 } 5676 #endif 5677 5678 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5679 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5680 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5681 return true; 5682 } 5683 5684 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5685 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5686 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5687 return true; 5688 } 5689 5690 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5691 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5692 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5693 return true; 5694 } 5695 5696 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5697 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5698 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5699 connection->state = SENT_DISCONNECT; 5700 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5701 return true; 5702 } 5703 5704 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5705 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5706 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5707 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5708 return true; 5709 } 5710 5711 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5712 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5713 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5714 return true; 5715 } 5716 5717 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5718 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5719 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5720 return true; 5721 } 5722 5723 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5724 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5725 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5726 return true; 5727 } 5728 5729 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5730 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5731 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5732 return true; 5733 } 5734 5735 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5736 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5737 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5738 return true; 5739 } 5740 #endif 5741 5742 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5743 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5744 #ifdef ENABLE_CLASSIC 5745 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5746 #endif 5747 if (connection->state != SENT_DISCONNECT){ 5748 connection->state = SENT_DISCONNECT; 5749 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5750 return true; 5751 } 5752 } 5753 5754 #ifdef ENABLE_CLASSIC 5755 uint16_t sniff_min_interval; 5756 switch (connection->sniff_min_interval){ 5757 case 0: 5758 break; 5759 case 0xffff: 5760 connection->sniff_min_interval = 0; 5761 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5762 return true; 5763 default: 5764 sniff_min_interval = connection->sniff_min_interval; 5765 connection->sniff_min_interval = 0; 5766 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5767 return true; 5768 } 5769 5770 if (connection->sniff_subrating_max_latency != 0xffff){ 5771 uint16_t max_latency = connection->sniff_subrating_max_latency; 5772 connection->sniff_subrating_max_latency = 0; 5773 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5774 return true; 5775 } 5776 5777 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5778 uint8_t service_type = (uint8_t) connection->qos_service_type; 5779 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5780 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); 5781 return true; 5782 } 5783 5784 if (connection->request_role != HCI_ROLE_INVALID){ 5785 hci_role_t role = connection->request_role; 5786 connection->request_role = HCI_ROLE_INVALID; 5787 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5788 return true; 5789 } 5790 #endif 5791 5792 if (connection->gap_connection_tasks != 0){ 5793 #ifdef ENABLE_CLASSIC 5794 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 5795 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 5796 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 5797 return true; 5798 } 5799 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 5800 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 5801 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5802 return true; 5803 } 5804 #endif 5805 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 5806 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 5807 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5808 return true; 5809 } 5810 } 5811 5812 #ifdef ENABLE_BLE 5813 switch (connection->le_con_parameter_update_state){ 5814 // response to L2CAP CON PARAMETER UPDATE REQUEST 5815 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5816 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5817 hci_send_cmd(&hci_le_connection_update, 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_REPLY: 5822 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5823 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5824 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5825 0x0000, 0xffff); 5826 return true; 5827 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5828 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5829 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5830 return true; 5831 default: 5832 break; 5833 } 5834 if (connection->le_phy_update_all_phys != 0xffu){ 5835 uint8_t all_phys = connection->le_phy_update_all_phys; 5836 connection->le_phy_update_all_phys = 0xff; 5837 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); 5838 return true; 5839 } 5840 #endif 5841 } 5842 return false; 5843 } 5844 5845 static void hci_run(void){ 5846 5847 // stack state sub statemachines 5848 // halting needs to be called even if we cannot send command packet now 5849 switch (hci_stack->state) { 5850 case HCI_STATE_INITIALIZING: 5851 hci_initializing_run(); 5852 break; 5853 case HCI_STATE_HALTING: 5854 hci_halting_run(); 5855 break; 5856 case HCI_STATE_FALLING_ASLEEP: 5857 hci_falling_asleep_run(); 5858 break; 5859 default: 5860 break; 5861 } 5862 5863 bool done; 5864 5865 // send continuation fragments first, as they block the prepared packet buffer 5866 done = hci_run_acl_fragments(); 5867 if (done) return; 5868 5869 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5870 // send host num completed packets next as they don't require num_cmd_packets > 0 5871 if (!hci_can_send_comand_packet_transport()) return; 5872 if (hci_stack->host_completed_packets){ 5873 hci_host_num_completed_packets(); 5874 return; 5875 } 5876 #endif 5877 5878 if (!hci_can_send_command_packet_now()) return; 5879 5880 // global/non-connection oriented commands 5881 5882 5883 #ifdef ENABLE_CLASSIC 5884 // general gap classic 5885 done = hci_run_general_gap_classic(); 5886 if (done) return; 5887 #endif 5888 5889 #ifdef ENABLE_BLE 5890 // general gap le 5891 done = hci_run_general_gap_le(); 5892 if (done) return; 5893 #endif 5894 5895 // send pending HCI commands 5896 hci_run_general_pending_commands(); 5897 } 5898 5899 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5900 // house-keeping 5901 5902 #ifdef ENABLE_CLASSIC 5903 bd_addr_t addr; 5904 hci_connection_t * conn; 5905 #endif 5906 #ifdef ENABLE_LE_CENTRAL 5907 uint8_t initiator_filter_policy; 5908 #endif 5909 5910 uint16_t opcode = little_endian_read_16(packet, 0); 5911 switch (opcode) { 5912 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5913 hci_stack->loopback_mode = packet[3]; 5914 break; 5915 5916 #ifdef ENABLE_CLASSIC 5917 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5918 reverse_bd_addr(&packet[3], addr); 5919 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5920 5921 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5922 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5923 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5924 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5925 } 5926 5927 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5928 if (!conn) { 5929 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5930 if (!conn) { 5931 // notify client that alloc failed 5932 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5933 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5934 } 5935 conn->state = SEND_CREATE_CONNECTION; 5936 conn->role = HCI_ROLE_MASTER; 5937 } 5938 5939 conn->con_handle = HCI_CON_HANDLE_INVALID; 5940 conn->role = HCI_ROLE_INVALID; 5941 5942 log_info("conn state %u", conn->state); 5943 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5944 switch (conn->state) { 5945 // if connection active exists 5946 case OPEN: 5947 // and OPEN, emit connection complete command 5948 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5949 // packet not sent to controller 5950 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5951 case RECEIVED_DISCONNECTION_COMPLETE: 5952 // create connection triggered in disconnect complete event, let's do it now 5953 break; 5954 case SEND_CREATE_CONNECTION: 5955 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5956 if (hci_classic_operation_active()){ 5957 return ERROR_CODE_SUCCESS; 5958 } 5959 #endif 5960 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5961 break; 5962 default: 5963 // otherwise, just ignore as it is already in the open process 5964 // packet not sent to controller 5965 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5966 } 5967 conn->state = SENT_CREATE_CONNECTION; 5968 5969 // track outgoing connection 5970 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5971 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5972 break; 5973 5974 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5975 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5976 // setup_synchronous_connection? Voice setting at offset 22 5977 // TODO: compare to current setting if sco connection already active 5978 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5979 break; 5980 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5981 // accept_synchronous_connection? Voice setting at offset 18 5982 // TODO: compare to current setting if sco connection already active 5983 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5984 // track outgoing connection 5985 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5986 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5987 break; 5988 #endif 5989 #endif 5990 5991 #ifdef ENABLE_BLE 5992 #ifdef ENABLE_LE_CENTRAL 5993 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5994 // white list used? 5995 initiator_filter_policy = packet[7]; 5996 switch (initiator_filter_policy) { 5997 case 0: 5998 // whitelist not used 5999 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6000 break; 6001 case 1: 6002 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6003 break; 6004 default: 6005 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6006 break; 6007 } 6008 // track outgoing connection 6009 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6010 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6011 break; 6012 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6013 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6014 break; 6015 #endif 6016 #endif 6017 default: 6018 break; 6019 } 6020 6021 hci_stack->num_cmd_packets--; 6022 6023 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6024 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6025 if (err != 0){ 6026 return ERROR_CODE_HARDWARE_FAILURE; 6027 } 6028 return ERROR_CODE_SUCCESS; 6029 } 6030 6031 // disconnect because of security block 6032 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6033 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6034 if (!connection) return; 6035 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6036 } 6037 6038 6039 // Configure Secure Simple Pairing 6040 6041 #ifdef ENABLE_CLASSIC 6042 6043 // enable will enable SSP during init 6044 void gap_ssp_set_enable(int enable){ 6045 hci_stack->ssp_enable = enable; 6046 } 6047 6048 static int hci_local_ssp_activated(void){ 6049 return gap_ssp_supported() && hci_stack->ssp_enable; 6050 } 6051 6052 // if set, BTstack will respond to io capability request using authentication requirement 6053 void gap_ssp_set_io_capability(int io_capability){ 6054 hci_stack->ssp_io_capability = io_capability; 6055 } 6056 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6057 hci_stack->ssp_authentication_requirement = authentication_requirement; 6058 } 6059 6060 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6061 void gap_ssp_set_auto_accept(int auto_accept){ 6062 hci_stack->ssp_auto_accept = auto_accept; 6063 } 6064 6065 void gap_secure_connections_enable(bool enable){ 6066 hci_stack->secure_connections_enable = enable; 6067 } 6068 bool gap_secure_connections_active(void){ 6069 return hci_stack->secure_connections_active; 6070 } 6071 6072 #endif 6073 6074 // va_list part of hci_send_cmd 6075 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6076 if (!hci_can_send_command_packet_now()){ 6077 log_error("hci_send_cmd called but cannot send packet now"); 6078 return ERROR_CODE_COMMAND_DISALLOWED; 6079 } 6080 6081 // for HCI INITIALIZATION 6082 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6083 hci_stack->last_cmd_opcode = cmd->opcode; 6084 6085 hci_reserve_packet_buffer(); 6086 uint8_t * packet = hci_stack->hci_packet_buffer; 6087 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6088 uint8_t status = hci_send_cmd_packet(packet, size); 6089 6090 // release packet buffer on error or for synchronous transport implementations 6091 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6092 hci_release_packet_buffer(); 6093 hci_emit_transport_packet_sent(); 6094 } 6095 6096 return status; 6097 } 6098 6099 /** 6100 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6101 */ 6102 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6103 va_list argptr; 6104 va_start(argptr, cmd); 6105 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6106 va_end(argptr); 6107 return status; 6108 } 6109 6110 // Create various non-HCI events. 6111 // TODO: generalize, use table similar to hci_create_command 6112 6113 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6114 // dump packet 6115 if (dump) { 6116 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 6117 } 6118 6119 // dispatch to all event handlers 6120 btstack_linked_list_iterator_t it; 6121 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6122 while (btstack_linked_list_iterator_has_next(&it)){ 6123 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6124 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6125 } 6126 } 6127 6128 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6129 if (!hci_stack->acl_packet_handler) return; 6130 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6131 } 6132 6133 #ifdef ENABLE_CLASSIC 6134 static void hci_notify_if_sco_can_send_now(void){ 6135 // notify SCO sender if waiting 6136 if (!hci_stack->sco_waiting_for_can_send_now) return; 6137 if (hci_can_send_sco_packet_now()){ 6138 hci_stack->sco_waiting_for_can_send_now = 0; 6139 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6140 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6141 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6142 } 6143 } 6144 6145 // parsing end emitting has been merged to reduce code size 6146 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6147 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6148 6149 uint8_t * eir_data; 6150 ad_context_t context; 6151 const uint8_t * name; 6152 uint8_t name_len; 6153 6154 if (size < 3) return; 6155 6156 int event_type = hci_event_packet_get_type(packet); 6157 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6158 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6159 6160 switch (event_type){ 6161 case HCI_EVENT_INQUIRY_RESULT: 6162 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6163 if (size != (3 + (num_responses * 14))) return; 6164 break; 6165 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6166 if (size != 257) return; 6167 if (num_responses != 1) return; 6168 break; 6169 default: 6170 return; 6171 } 6172 6173 // event[1] is set at the end 6174 int i; 6175 for (i=0; i<num_responses;i++){ 6176 memset(event, 0, sizeof(event)); 6177 event[0] = GAP_EVENT_INQUIRY_RESULT; 6178 uint8_t event_size = 27; // if name is not set by EIR 6179 6180 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6181 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6182 (void)memcpy(&event[9], 6183 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6184 3); // class of device 6185 (void)memcpy(&event[12], 6186 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6187 2); // clock offset 6188 6189 switch (event_type){ 6190 case HCI_EVENT_INQUIRY_RESULT: 6191 // 14,15,16,17 = 0, size 18 6192 break; 6193 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6194 event[14] = 1; 6195 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6196 // 16,17 = 0, size 18 6197 break; 6198 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6199 event[14] = 1; 6200 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6201 // EIR packets only contain a single inquiry response 6202 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6203 name = NULL; 6204 // Iterate over EIR data 6205 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6206 uint8_t data_type = ad_iterator_get_data_type(&context); 6207 uint8_t data_size = ad_iterator_get_data_len(&context); 6208 const uint8_t * data = ad_iterator_get_data(&context); 6209 // Prefer Complete Local Name over Shortened Local Name 6210 switch (data_type){ 6211 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6212 if (name) continue; 6213 /* fall through */ 6214 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6215 name = data; 6216 name_len = data_size; 6217 break; 6218 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6219 if (data_size != 8) break; 6220 event[16] = 1; 6221 memcpy(&event[17], data, 8); 6222 break; 6223 default: 6224 break; 6225 } 6226 } 6227 if (name){ 6228 event[25] = 1; 6229 // truncate name if needed 6230 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6231 event[26] = len; 6232 (void)memcpy(&event[27], name, len); 6233 event_size += len; 6234 } 6235 break; 6236 default: 6237 return; 6238 } 6239 event[1] = event_size - 2; 6240 hci_emit_event(event, event_size, 1); 6241 } 6242 } 6243 #endif 6244 6245 void hci_emit_state(void){ 6246 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6247 uint8_t event[3]; 6248 event[0] = BTSTACK_EVENT_STATE; 6249 event[1] = sizeof(event) - 2u; 6250 event[2] = hci_stack->state; 6251 hci_emit_event(event, sizeof(event), 1); 6252 } 6253 6254 #ifdef ENABLE_CLASSIC 6255 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6256 uint8_t event[13]; 6257 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6258 event[1] = sizeof(event) - 2; 6259 event[2] = status; 6260 little_endian_store_16(event, 3, con_handle); 6261 reverse_bd_addr(address, &event[5]); 6262 event[11] = 1; // ACL connection 6263 event[12] = 0; // encryption disabled 6264 hci_emit_event(event, sizeof(event), 1); 6265 } 6266 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6267 if (disable_l2cap_timeouts) return; 6268 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6269 uint8_t event[4]; 6270 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6271 event[1] = sizeof(event) - 2; 6272 little_endian_store_16(event, 2, conn->con_handle); 6273 hci_emit_event(event, sizeof(event), 1); 6274 } 6275 #endif 6276 6277 #ifdef ENABLE_BLE 6278 #ifdef ENABLE_LE_CENTRAL 6279 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){ 6280 uint8_t event[21]; 6281 event[0] = HCI_EVENT_LE_META; 6282 event[1] = sizeof(event) - 2u; 6283 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6284 event[3] = status; 6285 little_endian_store_16(event, 4, con_handle); 6286 event[6] = 0; // TODO: role 6287 event[7] = address_type; 6288 reverse_bd_addr(address, &event[8]); 6289 little_endian_store_16(event, 14, 0); // interval 6290 little_endian_store_16(event, 16, 0); // latency 6291 little_endian_store_16(event, 18, 0); // supervision timeout 6292 event[20] = 0; // master clock accuracy 6293 hci_emit_event(event, sizeof(event), 1); 6294 } 6295 #endif 6296 #endif 6297 6298 static void hci_emit_transport_packet_sent(void){ 6299 // notify upper stack that it might be possible to send again 6300 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6301 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6302 } 6303 6304 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6305 uint8_t event[6]; 6306 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6307 event[1] = sizeof(event) - 2u; 6308 event[2] = 0; // status = OK 6309 little_endian_store_16(event, 3, con_handle); 6310 event[5] = reason; 6311 hci_emit_event(event, sizeof(event), 1); 6312 } 6313 6314 static void hci_emit_nr_connections_changed(void){ 6315 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6316 uint8_t event[3]; 6317 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6318 event[1] = sizeof(event) - 2u; 6319 event[2] = nr_hci_connections(); 6320 hci_emit_event(event, sizeof(event), 1); 6321 } 6322 6323 static void hci_emit_hci_open_failed(void){ 6324 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6325 uint8_t event[2]; 6326 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6327 event[1] = sizeof(event) - 2u; 6328 hci_emit_event(event, sizeof(event), 1); 6329 } 6330 6331 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6332 log_info("hci_emit_dedicated_bonding_result %u ", status); 6333 uint8_t event[9]; 6334 int pos = 0; 6335 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6336 event[pos++] = sizeof(event) - 2u; 6337 event[pos++] = status; 6338 reverse_bd_addr(address, &event[pos]); 6339 hci_emit_event(event, sizeof(event), 1); 6340 } 6341 6342 6343 #ifdef ENABLE_CLASSIC 6344 6345 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6346 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6347 uint8_t event[5]; 6348 int pos = 0; 6349 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6350 event[pos++] = sizeof(event) - 2; 6351 little_endian_store_16(event, 2, con_handle); 6352 pos += 2; 6353 event[pos++] = level; 6354 hci_emit_event(event, sizeof(event), 1); 6355 } 6356 6357 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6358 if (!connection) return LEVEL_0; 6359 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6360 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6361 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6362 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6363 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6364 // LEVEL 4 always requires 128 bit encrytion key size 6365 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6366 security_level = LEVEL_3; 6367 } 6368 return security_level; 6369 } 6370 6371 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6372 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6373 uint8_t event[3]; 6374 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6375 event[1] = sizeof(event) - 2; 6376 event[2] = enabled; 6377 hci_emit_event(event, sizeof(event), 1); 6378 } 6379 6380 // query if remote side supports eSCO 6381 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6382 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6383 if (!connection) return false; 6384 return (connection->remote_supported_features[0] & 1) != 0; 6385 } 6386 6387 static bool hci_ssp_supported(hci_connection_t * connection){ 6388 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6389 return (connection->bonding_flags & mask) == mask; 6390 } 6391 6392 // query if remote side supports SSP 6393 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6394 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6395 if (!connection) return false; 6396 return hci_ssp_supported(connection) ? 1 : 0; 6397 } 6398 6399 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6400 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6401 } 6402 6403 /** 6404 * Check if remote supported features query has completed 6405 */ 6406 bool hci_remote_features_available(hci_con_handle_t handle){ 6407 hci_connection_t * connection = hci_connection_for_handle(handle); 6408 if (!connection) return false; 6409 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6410 } 6411 6412 /** 6413 * Trigger remote supported features query 6414 */ 6415 6416 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6417 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6418 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6419 } 6420 } 6421 6422 void hci_remote_features_query(hci_con_handle_t con_handle){ 6423 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6424 if (!connection) return; 6425 hci_trigger_remote_features_for_connection(connection); 6426 hci_run(); 6427 } 6428 6429 // GAP API 6430 /** 6431 * @bbrief enable/disable bonding. default is enabled 6432 * @praram enabled 6433 */ 6434 void gap_set_bondable_mode(int enable){ 6435 hci_stack->bondable = enable ? 1 : 0; 6436 } 6437 /** 6438 * @brief Get bondable mode. 6439 * @return 1 if bondable 6440 */ 6441 int gap_get_bondable_mode(void){ 6442 return hci_stack->bondable; 6443 } 6444 6445 /** 6446 * @brief map link keys to security levels 6447 */ 6448 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6449 switch (link_key_type){ 6450 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6451 return LEVEL_4; 6452 case COMBINATION_KEY: 6453 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6454 return LEVEL_3; 6455 default: 6456 return LEVEL_2; 6457 } 6458 } 6459 6460 /** 6461 * @brief map link keys to secure connection yes/no 6462 */ 6463 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6464 switch (link_key_type){ 6465 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6466 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6467 return true; 6468 default: 6469 return false; 6470 } 6471 } 6472 6473 /** 6474 * @brief map link keys to authenticated 6475 */ 6476 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6477 switch (link_key_type){ 6478 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6479 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6480 return true; 6481 default: 6482 return false; 6483 } 6484 } 6485 6486 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6487 log_info("gap_mitm_protection_required_for_security_level %u", level); 6488 return level > LEVEL_2; 6489 } 6490 6491 /** 6492 * @brief get current security level 6493 */ 6494 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6495 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6496 if (!connection) return LEVEL_0; 6497 return gap_security_level_for_connection(connection); 6498 } 6499 6500 /** 6501 * @brief request connection to device to 6502 * @result GAP_AUTHENTICATION_RESULT 6503 */ 6504 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6505 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6506 if (!connection){ 6507 hci_emit_security_level(con_handle, LEVEL_0); 6508 return; 6509 } 6510 6511 btstack_assert(hci_is_le_connection(connection) == false); 6512 6513 // 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) 6514 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6515 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6516 requested_level = LEVEL_4; 6517 } 6518 6519 gap_security_level_t current_level = gap_security_level(con_handle); 6520 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6521 requested_level, connection->requested_security_level, current_level); 6522 6523 // authentication active if authentication request was sent or planned level > 0 6524 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6525 if (authentication_active){ 6526 // authentication already active 6527 if (connection->requested_security_level < requested_level){ 6528 // increase requested level as new level is higher 6529 // TODO: handle re-authentication when done 6530 connection->requested_security_level = requested_level; 6531 } 6532 } else { 6533 // no request active, notify if security sufficient 6534 if (requested_level <= current_level){ 6535 hci_emit_security_level(con_handle, current_level); 6536 return; 6537 } 6538 6539 // store request 6540 connection->requested_security_level = requested_level; 6541 6542 // request remote features if not already active 6543 hci_remote_features_query(con_handle); 6544 6545 // start to authenticate connection 6546 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6547 hci_run(); 6548 } 6549 } 6550 6551 /** 6552 * @brief start dedicated bonding with device. disconnect after bonding 6553 * @param device 6554 * @param request MITM protection 6555 * @result GAP_DEDICATED_BONDING_COMPLETE 6556 */ 6557 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6558 6559 // create connection state machine 6560 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6561 6562 if (!connection){ 6563 return BTSTACK_MEMORY_ALLOC_FAILED; 6564 } 6565 6566 // delete linkn key 6567 gap_drop_link_key_for_bd_addr(device); 6568 6569 // configure LEVEL_2/3, dedicated bonding 6570 connection->state = SEND_CREATE_CONNECTION; 6571 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6572 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6573 connection->bonding_flags = BONDING_DEDICATED; 6574 6575 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6576 6577 // handle: connnection failure (connection complete != ok) 6578 // handle: authentication failure 6579 // handle: disconnect on done 6580 6581 hci_run(); 6582 6583 return 0; 6584 } 6585 6586 void gap_set_local_name(const char * local_name){ 6587 hci_stack->local_name = local_name; 6588 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6589 // also update EIR if not set by user 6590 if (hci_stack->eir_data == NULL){ 6591 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6592 } 6593 hci_run(); 6594 } 6595 #endif 6596 6597 6598 #ifdef ENABLE_BLE 6599 6600 #ifdef ENABLE_LE_CENTRAL 6601 void gap_start_scan(void){ 6602 hci_stack->le_scanning_enabled = true; 6603 hci_run(); 6604 } 6605 6606 void gap_stop_scan(void){ 6607 hci_stack->le_scanning_enabled = false; 6608 hci_run(); 6609 } 6610 6611 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6612 hci_stack->le_scan_type = scan_type; 6613 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6614 hci_stack->le_scan_interval = scan_interval; 6615 hci_stack->le_scan_window = scan_window; 6616 hci_stack->le_scanning_param_update = true; 6617 hci_run(); 6618 } 6619 6620 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6621 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6622 } 6623 6624 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6625 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6626 if (!conn){ 6627 // disallow if le connection is already outgoing 6628 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6629 log_error("le connection already active"); 6630 return ERROR_CODE_COMMAND_DISALLOWED; 6631 } 6632 6633 log_info("gap_connect: no connection exists yet, creating context"); 6634 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6635 if (!conn){ 6636 // notify client that alloc failed 6637 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6638 log_info("gap_connect: failed to alloc hci_connection_t"); 6639 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6640 } 6641 6642 // set le connecting state 6643 if (hci_is_le_connection_type(addr_type)){ 6644 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6645 } 6646 6647 conn->state = SEND_CREATE_CONNECTION; 6648 log_info("gap_connect: send create connection next"); 6649 hci_run(); 6650 return ERROR_CODE_SUCCESS; 6651 } 6652 6653 if (!hci_is_le_connection(conn) || 6654 (conn->state == SEND_CREATE_CONNECTION) || 6655 (conn->state == SENT_CREATE_CONNECTION)) { 6656 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6657 log_error("gap_connect: classic connection or connect is already being created"); 6658 return GATT_CLIENT_IN_WRONG_STATE; 6659 } 6660 6661 // check if connection was just disconnected 6662 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6663 log_info("gap_connect: send create connection (again)"); 6664 conn->state = SEND_CREATE_CONNECTION; 6665 hci_run(); 6666 return ERROR_CODE_SUCCESS; 6667 } 6668 6669 log_info("gap_connect: context exists with state %u", conn->state); 6670 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6671 hci_run(); 6672 return ERROR_CODE_SUCCESS; 6673 } 6674 6675 // @assumption: only a single outgoing LE Connection exists 6676 static hci_connection_t * gap_get_outgoing_connection(void){ 6677 btstack_linked_item_t *it; 6678 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6679 hci_connection_t * conn = (hci_connection_t *) it; 6680 if (!hci_is_le_connection(conn)) continue; 6681 switch (conn->state){ 6682 case SEND_CREATE_CONNECTION: 6683 case SENT_CREATE_CONNECTION: 6684 case SENT_CANCEL_CONNECTION: 6685 return conn; 6686 default: 6687 break; 6688 }; 6689 } 6690 return NULL; 6691 } 6692 6693 uint8_t gap_connect_cancel(void){ 6694 hci_connection_t * conn = gap_get_outgoing_connection(); 6695 if (!conn) return 0; 6696 switch (conn->state){ 6697 case SEND_CREATE_CONNECTION: 6698 // skip sending create connection and emit event instead 6699 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6700 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6701 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6702 btstack_memory_hci_connection_free( conn ); 6703 break; 6704 case SENT_CREATE_CONNECTION: 6705 // request to send cancel connection 6706 conn->state = SEND_CANCEL_CONNECTION; 6707 hci_run(); 6708 break; 6709 default: 6710 break; 6711 } 6712 return 0; 6713 } 6714 6715 /** 6716 * @brief Set connection parameters for outgoing connections 6717 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6718 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6719 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6720 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6721 * @param conn_latency, default: 4 6722 * @param supervision_timeout (unit: 10ms), default: 720 ms 6723 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6724 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6725 */ 6726 6727 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6728 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6729 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6730 hci_stack->le_connection_scan_interval = conn_scan_interval; 6731 hci_stack->le_connection_scan_window = conn_scan_window; 6732 hci_stack->le_connection_interval_min = conn_interval_min; 6733 hci_stack->le_connection_interval_max = conn_interval_max; 6734 hci_stack->le_connection_latency = conn_latency; 6735 hci_stack->le_supervision_timeout = supervision_timeout; 6736 hci_stack->le_minimum_ce_length = min_ce_length; 6737 hci_stack->le_maximum_ce_length = max_ce_length; 6738 } 6739 #endif 6740 6741 /** 6742 * @brief Updates the connection parameters for a given LE connection 6743 * @param handle 6744 * @param conn_interval_min (unit: 1.25ms) 6745 * @param conn_interval_max (unit: 1.25ms) 6746 * @param conn_latency 6747 * @param supervision_timeout (unit: 10ms) 6748 * @return 0 if ok 6749 */ 6750 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6751 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6752 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6753 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6754 connection->le_conn_interval_min = conn_interval_min; 6755 connection->le_conn_interval_max = conn_interval_max; 6756 connection->le_conn_latency = conn_latency; 6757 connection->le_supervision_timeout = supervision_timeout; 6758 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6759 hci_run(); 6760 return 0; 6761 } 6762 6763 /** 6764 * @brief Request an update of the connection parameter for a given LE connection 6765 * @param handle 6766 * @param conn_interval_min (unit: 1.25ms) 6767 * @param conn_interval_max (unit: 1.25ms) 6768 * @param conn_latency 6769 * @param supervision_timeout (unit: 10ms) 6770 * @return 0 if ok 6771 */ 6772 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6773 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6774 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6775 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6776 connection->le_conn_interval_min = conn_interval_min; 6777 connection->le_conn_interval_max = conn_interval_max; 6778 connection->le_conn_latency = conn_latency; 6779 connection->le_supervision_timeout = supervision_timeout; 6780 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6781 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6782 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6783 return 0; 6784 } 6785 6786 #ifdef ENABLE_LE_PERIPHERAL 6787 6788 /** 6789 * @brief Set Advertisement Data 6790 * @param advertising_data_length 6791 * @param advertising_data (max 31 octets) 6792 * @note data is not copied, pointer has to stay valid 6793 */ 6794 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6795 hci_stack->le_advertisements_data_len = advertising_data_length; 6796 hci_stack->le_advertisements_data = advertising_data; 6797 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6798 hci_run(); 6799 } 6800 6801 /** 6802 * @brief Set Scan Response Data 6803 * @param advertising_data_length 6804 * @param advertising_data (max 31 octets) 6805 * @note data is not copied, pointer has to stay valid 6806 */ 6807 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6808 hci_stack->le_scan_response_data_len = scan_response_data_length; 6809 hci_stack->le_scan_response_data = scan_response_data; 6810 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6811 hci_run(); 6812 } 6813 6814 /** 6815 * @brief Set Advertisement Parameters 6816 * @param adv_int_min 6817 * @param adv_int_max 6818 * @param adv_type 6819 * @param direct_address_type 6820 * @param direct_address 6821 * @param channel_map 6822 * @param filter_policy 6823 * 6824 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6825 */ 6826 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6827 uint8_t direct_address_typ, bd_addr_t direct_address, 6828 uint8_t channel_map, uint8_t filter_policy) { 6829 6830 hci_stack->le_advertisements_interval_min = adv_int_min; 6831 hci_stack->le_advertisements_interval_max = adv_int_max; 6832 hci_stack->le_advertisements_type = adv_type; 6833 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6834 hci_stack->le_advertisements_channel_map = channel_map; 6835 hci_stack->le_advertisements_filter_policy = filter_policy; 6836 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6837 6); 6838 6839 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6840 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6841 hci_run(); 6842 } 6843 6844 /** 6845 * @brief Enable/Disable Advertisements 6846 * @param enabled 6847 */ 6848 void gap_advertisements_enable(int enabled){ 6849 if (enabled == 0){ 6850 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6851 } else { 6852 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6853 } 6854 hci_update_advertisements_enabled_for_current_roles(); 6855 hci_run(); 6856 } 6857 6858 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6859 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6860 btstack_linked_list_iterator_t it; 6861 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6862 while (btstack_linked_list_iterator_has_next(&it)){ 6863 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6864 if ( item->advertising_handle == advertising_handle ) { 6865 return item; 6866 } 6867 } 6868 return NULL; 6869 } 6870 6871 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6872 // find free advertisement handle 6873 uint8_t advertisement_handle; 6874 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6875 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6876 } 6877 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6878 // clear 6879 memset(storage, 0, sizeof(le_advertising_set_t)); 6880 // copy params 6881 storage->advertising_handle = advertisement_handle; 6882 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6883 // add to list 6884 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6885 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6886 *out_advertising_handle = advertisement_handle; 6887 // set tasks and start 6888 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6889 hci_run(); 6890 return ERROR_CODE_SUCCESS; 6891 } 6892 6893 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6894 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6895 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6896 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6897 // set tasks and start 6898 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6899 hci_run(); 6900 return ERROR_CODE_SUCCESS; 6901 } 6902 6903 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6904 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6905 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6906 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6907 return ERROR_CODE_SUCCESS; 6908 } 6909 6910 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 6911 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6912 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6913 // periodic advertising requires neither connectable, scannable, legacy or anonymous 6914 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6915 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 6916 // set tasks and start 6917 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6918 hci_run(); 6919 return ERROR_CODE_SUCCESS; 6920 } 6921 6922 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 6923 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6924 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6925 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 6926 return ERROR_CODE_SUCCESS; 6927 } 6928 6929 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6930 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6931 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6932 memcpy(advertising_set->random_address, random_address, 6); 6933 // set tasks and start 6934 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6935 hci_run(); 6936 return ERROR_CODE_SUCCESS; 6937 } 6938 6939 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 6940 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6941 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6942 advertising_set->adv_data = advertising_data; 6943 advertising_set->adv_data_len = advertising_data_length; 6944 // set tasks and start 6945 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6946 hci_run(); 6947 return ERROR_CODE_SUCCESS; 6948 } 6949 6950 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){ 6951 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6952 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6953 advertising_set->scan_data = scan_response_data; 6954 advertising_set->scan_data_len = scan_response_data_length; 6955 // set tasks and start 6956 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6957 hci_run(); 6958 return ERROR_CODE_SUCCESS; 6959 } 6960 6961 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 6962 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6963 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6964 advertising_set->periodic_data = periodic_data; 6965 advertising_set->periodic_data_len = periodic_data_length; 6966 // set tasks and start 6967 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6968 hci_run(); 6969 return ERROR_CODE_SUCCESS; 6970 } 6971 6972 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6973 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6974 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6975 advertising_set->enable_timeout = timeout; 6976 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6977 // set tasks and start 6978 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6979 hci_run(); 6980 return ERROR_CODE_SUCCESS; 6981 } 6982 6983 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6984 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6985 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6986 // set tasks and start 6987 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6988 hci_run(); 6989 return ERROR_CODE_SUCCESS; 6990 } 6991 6992 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 6993 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6994 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6995 // set tasks and start 6996 advertising_set->periodic_include_adi = include_adi; 6997 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6998 hci_run(); 6999 return ERROR_CODE_SUCCESS; 7000 } 7001 7002 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7003 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7004 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7005 // set tasks and start 7006 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7007 hci_run(); 7008 return ERROR_CODE_SUCCESS; 7009 } 7010 7011 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7012 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7013 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7014 // set tasks and start 7015 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7016 hci_run(); 7017 return ERROR_CODE_SUCCESS; 7018 } 7019 #endif 7020 7021 #endif 7022 7023 void hci_le_set_own_address_type(uint8_t own_address_type){ 7024 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7025 if (own_address_type == hci_stack->le_own_addr_type) return; 7026 hci_stack->le_own_addr_type = own_address_type; 7027 7028 #ifdef ENABLE_LE_PERIPHERAL 7029 // update advertisement parameters, too 7030 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7031 hci_run(); 7032 #endif 7033 #ifdef ENABLE_LE_CENTRAL 7034 // note: we don't update scan parameters or modify ongoing connection attempts 7035 #endif 7036 } 7037 7038 void hci_le_random_address_set(const bd_addr_t random_address){ 7039 memcpy(hci_stack->le_random_address, random_address, 6); 7040 hci_stack->le_random_address_set = true; 7041 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7042 hci_run(); 7043 } 7044 7045 #endif 7046 7047 uint8_t gap_disconnect(hci_con_handle_t handle){ 7048 hci_connection_t * conn = hci_connection_for_handle(handle); 7049 if (!conn){ 7050 hci_emit_disconnection_complete(handle, 0); 7051 return 0; 7052 } 7053 // ignore if already disconnected 7054 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7055 return 0; 7056 } 7057 conn->state = SEND_DISCONNECT; 7058 hci_run(); 7059 return 0; 7060 } 7061 7062 int gap_read_rssi(hci_con_handle_t con_handle){ 7063 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7064 if (hci_connection == NULL) return 0; 7065 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7066 hci_run(); 7067 return 1; 7068 } 7069 7070 /** 7071 * @brief Get connection type 7072 * @param con_handle 7073 * @result connection_type 7074 */ 7075 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7076 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7077 if (!conn) return GAP_CONNECTION_INVALID; 7078 switch (conn->address_type){ 7079 case BD_ADDR_TYPE_LE_PUBLIC: 7080 case BD_ADDR_TYPE_LE_RANDOM: 7081 return GAP_CONNECTION_LE; 7082 case BD_ADDR_TYPE_SCO: 7083 return GAP_CONNECTION_SCO; 7084 case BD_ADDR_TYPE_ACL: 7085 return GAP_CONNECTION_ACL; 7086 default: 7087 return GAP_CONNECTION_INVALID; 7088 } 7089 } 7090 7091 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7092 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7093 if (!conn) return HCI_ROLE_INVALID; 7094 return (hci_role_t) conn->role; 7095 } 7096 7097 7098 #ifdef ENABLE_CLASSIC 7099 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7100 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7101 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7102 conn->request_role = role; 7103 hci_run(); 7104 return ERROR_CODE_SUCCESS; 7105 } 7106 #endif 7107 7108 #ifdef ENABLE_BLE 7109 7110 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){ 7111 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7112 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7113 7114 conn->le_phy_update_all_phys = all_phys; 7115 conn->le_phy_update_tx_phys = tx_phys; 7116 conn->le_phy_update_rx_phys = rx_phys; 7117 conn->le_phy_update_phy_options = phy_options; 7118 7119 hci_run(); 7120 7121 return 0; 7122 } 7123 7124 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7125 // check if already in list 7126 btstack_linked_list_iterator_t it; 7127 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7128 while (btstack_linked_list_iterator_has_next(&it)) { 7129 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7130 if (entry->address_type != address_type) { 7131 continue; 7132 } 7133 if (memcmp(entry->address, address, 6) != 0) { 7134 continue; 7135 } 7136 // disallow if already scheduled to add 7137 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7138 return ERROR_CODE_COMMAND_DISALLOWED; 7139 } 7140 // still on controller, but scheduled to remove -> re-add 7141 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7142 return ERROR_CODE_SUCCESS; 7143 } 7144 // alloc and add to list 7145 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7146 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7147 entry->address_type = address_type; 7148 (void)memcpy(entry->address, address, 6); 7149 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7150 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7151 return ERROR_CODE_SUCCESS; 7152 } 7153 7154 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7155 btstack_linked_list_iterator_t it; 7156 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7157 while (btstack_linked_list_iterator_has_next(&it)){ 7158 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7159 if (entry->address_type != address_type) { 7160 continue; 7161 } 7162 if (memcmp(entry->address, address, 6) != 0) { 7163 continue; 7164 } 7165 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7166 // remove from controller if already present 7167 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7168 } else { 7169 // directly remove entry from whitelist 7170 btstack_linked_list_iterator_remove(&it); 7171 btstack_memory_whitelist_entry_free(entry); 7172 } 7173 return ERROR_CODE_SUCCESS; 7174 } 7175 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7176 } 7177 7178 static void hci_whitelist_clear(void){ 7179 btstack_linked_list_iterator_t it; 7180 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7181 while (btstack_linked_list_iterator_has_next(&it)){ 7182 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7183 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7184 // remove from controller if already present 7185 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7186 continue; 7187 } 7188 // directly remove entry from whitelist 7189 btstack_linked_list_iterator_remove(&it); 7190 btstack_memory_whitelist_entry_free(entry); 7191 } 7192 } 7193 7194 // free all entries unconditionally 7195 static void hci_whitelist_free(void){ 7196 btstack_linked_list_iterator_t lit; 7197 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7198 while (btstack_linked_list_iterator_has_next(&lit)){ 7199 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7200 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7201 btstack_memory_whitelist_entry_free(entry); 7202 } 7203 } 7204 7205 /** 7206 * @brief Clear Whitelist 7207 * @return 0 if ok 7208 */ 7209 uint8_t gap_whitelist_clear(void){ 7210 hci_whitelist_clear(); 7211 hci_run(); 7212 return ERROR_CODE_SUCCESS; 7213 } 7214 7215 /** 7216 * @brief Add Device to Whitelist 7217 * @param address_typ 7218 * @param address 7219 * @return 0 if ok 7220 */ 7221 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7222 uint8_t status = hci_whitelist_add(address_type, address); 7223 if (status){ 7224 return status; 7225 } 7226 hci_run(); 7227 return ERROR_CODE_SUCCESS; 7228 } 7229 7230 /** 7231 * @brief Remove Device from Whitelist 7232 * @param address_typ 7233 * @param address 7234 * @return 0 if ok 7235 */ 7236 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7237 uint8_t status = hci_whitelist_remove(address_type, address); 7238 if (status){ 7239 return status; 7240 } 7241 hci_run(); 7242 return ERROR_CODE_SUCCESS; 7243 } 7244 7245 #ifdef ENABLE_LE_CENTRAL 7246 /** 7247 * @brief Connect with Whitelist 7248 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7249 * @return - if ok 7250 */ 7251 uint8_t gap_connect_with_whitelist(void){ 7252 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7253 return ERROR_CODE_COMMAND_DISALLOWED; 7254 } 7255 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7256 hci_run(); 7257 return ERROR_CODE_SUCCESS; 7258 } 7259 7260 /** 7261 * @brief Auto Connection Establishment - Start Connecting to device 7262 * @param address_typ 7263 * @param address 7264 * @return 0 if ok 7265 */ 7266 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7267 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7268 return ERROR_CODE_COMMAND_DISALLOWED; 7269 } 7270 7271 uint8_t status = hci_whitelist_add(address_type, address); 7272 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7273 return status; 7274 } 7275 7276 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7277 7278 hci_run(); 7279 return ERROR_CODE_SUCCESS; 7280 } 7281 7282 /** 7283 * @brief Auto Connection Establishment - Stop Connecting to device 7284 * @param address_typ 7285 * @param address 7286 * @return 0 if ok 7287 */ 7288 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7289 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7290 return ERROR_CODE_COMMAND_DISALLOWED; 7291 } 7292 7293 hci_whitelist_remove(address_type, address); 7294 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7295 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7296 } 7297 hci_run(); 7298 return 0; 7299 } 7300 7301 /** 7302 * @brief Auto Connection Establishment - Stop everything 7303 * @note Convenience function to stop all active auto connection attempts 7304 */ 7305 uint8_t gap_auto_connection_stop_all(void){ 7306 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7307 return ERROR_CODE_COMMAND_DISALLOWED; 7308 } 7309 hci_whitelist_clear(); 7310 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7311 hci_run(); 7312 return ERROR_CODE_SUCCESS; 7313 } 7314 7315 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7316 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7317 if (!conn) return 0; 7318 return conn->le_connection_interval; 7319 } 7320 #endif 7321 #endif 7322 7323 #ifdef ENABLE_CLASSIC 7324 /** 7325 * @brief Set Extended Inquiry Response data 7326 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7327 * @note has to be done before stack starts up 7328 */ 7329 void gap_set_extended_inquiry_response(const uint8_t * data){ 7330 hci_stack->eir_data = data; 7331 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7332 hci_run(); 7333 } 7334 7335 /** 7336 * @brief Start GAP Classic Inquiry 7337 * @param duration in 1.28s units 7338 * @return 0 if ok 7339 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7340 */ 7341 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7342 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7343 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7344 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7345 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7346 } 7347 hci_stack->inquiry_state = duration_in_1280ms_units; 7348 hci_run(); 7349 return 0; 7350 } 7351 7352 /** 7353 * @brief Stop GAP Classic Inquiry 7354 * @return 0 if ok 7355 */ 7356 int gap_inquiry_stop(void){ 7357 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7358 // emit inquiry complete event, before it even started 7359 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7360 hci_emit_event(event, sizeof(event), 1); 7361 return 0; 7362 } 7363 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7364 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7365 hci_run(); 7366 return 0; 7367 } 7368 7369 void gap_inquiry_set_lap(uint32_t lap){ 7370 hci_stack->inquiry_lap = lap; 7371 } 7372 7373 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7374 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7375 hci_stack->inquiry_scan_window = inquiry_scan_window; 7376 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7377 hci_run(); 7378 } 7379 7380 7381 /** 7382 * @brief Remote Name Request 7383 * @param addr 7384 * @param page_scan_repetition_mode 7385 * @param clock_offset only used when bit 15 is set 7386 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7387 */ 7388 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7389 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7390 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7391 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7392 hci_stack->remote_name_clock_offset = clock_offset; 7393 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7394 hci_run(); 7395 return 0; 7396 } 7397 7398 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7399 hci_stack->gap_pairing_state = state; 7400 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7401 hci_run(); 7402 return 0; 7403 } 7404 7405 /** 7406 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7407 * @param addr 7408 * @param pin_data 7409 * @param pin_len 7410 * @return 0 if ok 7411 */ 7412 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7413 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7414 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7415 hci_stack->gap_pairing_pin_len = pin_len; 7416 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7417 } 7418 7419 /** 7420 * @brief Legacy Pairing Pin Code Response 7421 * @param addr 7422 * @param pin 7423 * @return 0 if ok 7424 */ 7425 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7426 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7427 } 7428 7429 /** 7430 * @brief Abort Legacy Pairing 7431 * @param addr 7432 * @param pin 7433 * @return 0 if ok 7434 */ 7435 int gap_pin_code_negative(bd_addr_t addr){ 7436 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7437 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7438 } 7439 7440 /** 7441 * @brief SSP Passkey Response 7442 * @param addr 7443 * @param passkey 7444 * @return 0 if ok 7445 */ 7446 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7447 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7448 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7449 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7450 } 7451 7452 /** 7453 * @brief Abort SSP Passkey Entry/Pairing 7454 * @param addr 7455 * @param pin 7456 * @return 0 if ok 7457 */ 7458 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7459 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7460 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7461 } 7462 7463 /** 7464 * @brief Accept SSP Numeric Comparison 7465 * @param addr 7466 * @param passkey 7467 * @return 0 if ok 7468 */ 7469 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7470 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7471 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7472 } 7473 7474 /** 7475 * @brief Abort SSP Numeric Comparison/Pairing 7476 * @param addr 7477 * @param pin 7478 * @return 0 if ok 7479 */ 7480 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7481 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7482 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7483 } 7484 7485 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7486 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7487 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7488 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7489 connectionSetAuthenticationFlags(conn, flag); 7490 hci_run(); 7491 return ERROR_CODE_SUCCESS; 7492 } 7493 #endif 7494 7495 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7496 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7497 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7498 } 7499 7500 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7501 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7502 } 7503 #endif 7504 7505 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7506 /** 7507 * @brief Report Remote OOB Data 7508 * @param bd_addr 7509 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7510 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7511 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7512 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7513 */ 7514 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){ 7515 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7516 if (connection == NULL) { 7517 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7518 } 7519 connection->classic_oob_c_192 = c_192; 7520 connection->classic_oob_r_192 = r_192; 7521 7522 // ignore P-256 if not supported by us 7523 if (hci_stack->secure_connections_active){ 7524 connection->classic_oob_c_256 = c_256; 7525 connection->classic_oob_r_256 = r_256; 7526 } 7527 7528 return ERROR_CODE_SUCCESS; 7529 } 7530 /** 7531 * @brief Generate new OOB data 7532 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7533 */ 7534 void gap_ssp_generate_oob_data(void){ 7535 hci_stack->classic_read_local_oob_data = true; 7536 hci_run(); 7537 } 7538 7539 #endif 7540 7541 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7542 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7543 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7544 if (connection == NULL) { 7545 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7546 } 7547 7548 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7549 connection->link_key_type = type; 7550 7551 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7552 } 7553 7554 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7555 /** 7556 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7557 * @param inquiry_mode see bluetooth_defines.h 7558 */ 7559 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7560 hci_stack->inquiry_mode = inquiry_mode; 7561 } 7562 7563 /** 7564 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7565 */ 7566 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7567 hci_stack->sco_voice_setting = voice_setting; 7568 } 7569 7570 /** 7571 * @brief Get SCO Voice Setting 7572 * @return current voice setting 7573 */ 7574 uint16_t hci_get_sco_voice_setting(void){ 7575 return hci_stack->sco_voice_setting; 7576 } 7577 7578 static int hci_have_usb_transport(void){ 7579 if (!hci_stack->hci_transport) return 0; 7580 const char * transport_name = hci_stack->hci_transport->name; 7581 if (!transport_name) return 0; 7582 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7583 } 7584 7585 /** @brief Get SCO packet length for current SCO Voice setting 7586 * @note Using SCO packets of the exact length is required for USB transfer 7587 * @return Length of SCO packets in bytes (not audio frames) 7588 */ 7589 uint16_t hci_get_sco_packet_length(void){ 7590 uint16_t sco_packet_length = 0; 7591 7592 #ifdef ENABLE_SCO_OVER_HCI 7593 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7594 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7595 7596 if (hci_have_usb_transport()){ 7597 // see Core Spec for H2 USB Transfer. 7598 // 3 byte SCO header + 24 bytes per connection 7599 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7600 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7601 } else { 7602 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7603 sco_packet_length = 3 + 60 * multiplier; 7604 // assert that it still fits inside an SCO buffer 7605 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7606 sco_packet_length = 3 + 60; 7607 } 7608 } 7609 #endif 7610 7611 #ifdef HAVE_SCO_TRANSPORT 7612 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7613 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7614 sco_packet_length = 3 + 60 * multiplier; 7615 #endif 7616 return sco_packet_length; 7617 } 7618 7619 /** 7620 * @brief Sets the master/slave policy 7621 * @param policy (0: attempt to become master, 1: let connecting device decide) 7622 */ 7623 void hci_set_master_slave_policy(uint8_t policy){ 7624 hci_stack->master_slave_policy = policy; 7625 } 7626 7627 #endif 7628 7629 HCI_STATE hci_get_state(void){ 7630 return hci_stack->state; 7631 } 7632 7633 #ifdef ENABLE_CLASSIC 7634 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7635 hci_stack->gap_classic_accept_callback = accept_callback; 7636 } 7637 #endif 7638 7639 /** 7640 * @brief Set callback for Bluetooth Hardware Error 7641 */ 7642 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7643 hci_stack->hardware_error_callback = fn; 7644 } 7645 7646 void hci_disconnect_all(void){ 7647 btstack_linked_list_iterator_t it; 7648 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7649 while (btstack_linked_list_iterator_has_next(&it)){ 7650 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7651 if (con->state == SENT_DISCONNECT) continue; 7652 con->state = SEND_DISCONNECT; 7653 } 7654 hci_run(); 7655 } 7656 7657 uint16_t hci_get_manufacturer(void){ 7658 return hci_stack->manufacturer; 7659 } 7660 7661 #ifdef ENABLE_BLE 7662 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7663 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7664 if (!hci_con) return NULL; 7665 return &hci_con->sm_connection; 7666 } 7667 7668 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7669 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7670 #endif 7671 7672 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7673 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7674 if (hci_connection == NULL) return 0; 7675 if (hci_is_le_connection(hci_connection)){ 7676 #ifdef ENABLE_BLE 7677 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7678 if (sm_conn->sm_connection_encrypted) { 7679 return sm_conn->sm_actual_encryption_key_size; 7680 } 7681 #endif 7682 } else { 7683 #ifdef ENABLE_CLASSIC 7684 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7685 return hci_connection->encryption_key_size; 7686 } 7687 #endif 7688 } 7689 return 0; 7690 } 7691 7692 bool gap_authenticated(hci_con_handle_t con_handle){ 7693 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7694 if (hci_connection == NULL) return false; 7695 7696 switch (hci_connection->address_type){ 7697 #ifdef ENABLE_BLE 7698 case BD_ADDR_TYPE_LE_PUBLIC: 7699 case BD_ADDR_TYPE_LE_RANDOM: 7700 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7701 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7702 #endif 7703 #ifdef ENABLE_CLASSIC 7704 case BD_ADDR_TYPE_SCO: 7705 case BD_ADDR_TYPE_ACL: 7706 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7707 #endif 7708 default: 7709 return false; 7710 } 7711 } 7712 7713 bool gap_secure_connection(hci_con_handle_t con_handle){ 7714 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7715 if (hci_connection == NULL) return 0; 7716 7717 switch (hci_connection->address_type){ 7718 #ifdef ENABLE_BLE 7719 case BD_ADDR_TYPE_LE_PUBLIC: 7720 case BD_ADDR_TYPE_LE_RANDOM: 7721 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7722 return hci_connection->sm_connection.sm_connection_sc != 0; 7723 #endif 7724 #ifdef ENABLE_CLASSIC 7725 case BD_ADDR_TYPE_SCO: 7726 case BD_ADDR_TYPE_ACL: 7727 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7728 #endif 7729 default: 7730 return false; 7731 } 7732 } 7733 7734 bool gap_bonded(hci_con_handle_t con_handle){ 7735 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7736 if (hci_connection == NULL) return 0; 7737 7738 #ifdef ENABLE_CLASSIC 7739 link_key_t link_key; 7740 link_key_type_t link_key_type; 7741 #endif 7742 switch (hci_connection->address_type){ 7743 #ifdef ENABLE_BLE 7744 case BD_ADDR_TYPE_LE_PUBLIC: 7745 case BD_ADDR_TYPE_LE_RANDOM: 7746 return hci_connection->sm_connection.sm_le_db_index >= 0; 7747 #endif 7748 #ifdef ENABLE_CLASSIC 7749 case BD_ADDR_TYPE_SCO: 7750 case BD_ADDR_TYPE_ACL: 7751 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7752 #endif 7753 default: 7754 return false; 7755 } 7756 } 7757 7758 #ifdef ENABLE_BLE 7759 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7760 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7761 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7762 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7763 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7764 return sm_conn->sm_connection_authorization_state; 7765 } 7766 #endif 7767 7768 #ifdef ENABLE_CLASSIC 7769 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){ 7770 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7771 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7772 conn->sniff_min_interval = sniff_min_interval; 7773 conn->sniff_max_interval = sniff_max_interval; 7774 conn->sniff_attempt = sniff_attempt; 7775 conn->sniff_timeout = sniff_timeout; 7776 hci_run(); 7777 return 0; 7778 } 7779 7780 /** 7781 * @brief Exit Sniff mode 7782 * @param con_handle 7783 @ @return 0 if ok 7784 */ 7785 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7786 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7787 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7788 conn->sniff_min_interval = 0xffff; 7789 hci_run(); 7790 return 0; 7791 } 7792 7793 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){ 7794 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7795 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7796 conn->sniff_subrating_max_latency = max_latency; 7797 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7798 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7799 hci_run(); 7800 return ERROR_CODE_SUCCESS; 7801 } 7802 7803 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){ 7804 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7805 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7806 conn->qos_service_type = service_type; 7807 conn->qos_token_rate = token_rate; 7808 conn->qos_peak_bandwidth = peak_bandwidth; 7809 conn->qos_latency = latency; 7810 conn->qos_delay_variation = delay_variation; 7811 hci_run(); 7812 return ERROR_CODE_SUCCESS; 7813 } 7814 7815 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7816 hci_stack->new_page_scan_interval = page_scan_interval; 7817 hci_stack->new_page_scan_window = page_scan_window; 7818 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7819 hci_run(); 7820 } 7821 7822 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7823 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7824 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7825 hci_run(); 7826 } 7827 7828 void gap_set_page_timeout(uint16_t page_timeout){ 7829 hci_stack->page_timeout = page_timeout; 7830 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7831 hci_run(); 7832 } 7833 7834 #endif 7835 7836 void hci_halting_defer(void){ 7837 if (hci_stack->state != HCI_STATE_HALTING) return; 7838 switch (hci_stack->substate){ 7839 case HCI_HALTING_READY_FOR_CLOSE: 7840 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 7841 break; 7842 default: 7843 break; 7844 } 7845 } 7846 7847 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7848 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7849 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7850 if (le_device_db_index >= le_device_db_max_count()) return; 7851 uint8_t offset = le_device_db_index >> 3; 7852 uint8_t mask = 1 << (le_device_db_index & 7); 7853 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7854 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7855 // note: go back to remove entries, otherwise, a remove + add will skip the add 7856 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7857 } 7858 } 7859 7860 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7861 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7862 if (le_device_db_index >= le_device_db_max_count()) return; 7863 uint8_t offset = le_device_db_index >> 3; 7864 uint8_t mask = 1 << (le_device_db_index & 7); 7865 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7866 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7867 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7868 } 7869 } 7870 7871 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7872 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7873 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7874 } 7875 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7876 // restart le resolving list update 7877 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7878 } 7879 return ERROR_CODE_SUCCESS; 7880 } 7881 #endif 7882 7883 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7884 void hci_setup_test_connections_fuzz(void){ 7885 hci_connection_t * conn; 7886 7887 // default address: 66:55:44:33:00:01 7888 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7889 7890 // setup Controller info 7891 hci_stack->num_cmd_packets = 255; 7892 hci_stack->acl_packets_total_num = 255; 7893 7894 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7895 addr[5] = 0x01; 7896 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7897 conn->con_handle = addr[5]; 7898 conn->role = HCI_ROLE_SLAVE; 7899 conn->state = RECEIVED_CONNECTION_REQUEST; 7900 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7901 7902 // setup incoming Classic SCO connection with con handle 0x0002 7903 addr[5] = 0x02; 7904 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7905 conn->con_handle = addr[5]; 7906 conn->role = HCI_ROLE_SLAVE; 7907 conn->state = RECEIVED_CONNECTION_REQUEST; 7908 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7909 7910 // setup ready Classic ACL connection with con handle 0x0003 7911 addr[5] = 0x03; 7912 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7913 conn->con_handle = addr[5]; 7914 conn->role = HCI_ROLE_SLAVE; 7915 conn->state = OPEN; 7916 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7917 7918 // setup ready Classic SCO connection with con handle 0x0004 7919 addr[5] = 0x04; 7920 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7921 conn->con_handle = addr[5]; 7922 conn->role = HCI_ROLE_SLAVE; 7923 conn->state = OPEN; 7924 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7925 7926 // setup ready LE ACL connection with con handle 0x005 and public address 7927 addr[5] = 0x05; 7928 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7929 conn->con_handle = addr[5]; 7930 conn->role = HCI_ROLE_SLAVE; 7931 conn->state = OPEN; 7932 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7933 conn->sm_connection.sm_connection_encrypted = 1; 7934 } 7935 7936 void hci_free_connections_fuzz(void){ 7937 btstack_linked_list_iterator_t it; 7938 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7939 while (btstack_linked_list_iterator_has_next(&it)){ 7940 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7941 btstack_linked_list_iterator_remove(&it); 7942 btstack_memory_hci_connection_free(con); 7943 } 7944 } 7945 void hci_simulate_working_fuzz(void){ 7946 hci_stack->le_scanning_param_update = false; 7947 hci_init_done(); 7948 hci_stack->num_cmd_packets = 255; 7949 } 7950 #endif 7951