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_MIN_PERIODIC_LEN_MIN 0x02 115 #define GAP_INQUIRY_MAX_PERIODIC_LEN_MIN 0x03 116 #define GAP_INQUIRY_STATE_IDLE 0x00 117 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 118 #define GAP_INQUIRY_STATE_ACTIVE 0x81 119 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 120 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 121 #define GAP_INQUIRY_STATE_PERIODIC 0x84 122 #define GAP_INQUIRY_STATE_W2_EXIT_PERIODIC 0x85 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // 140 // compact storage of relevant supported HCI Commands. 141 // X-Macro below provides enumeration and mapping table into the supported 142 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 143 // 144 145 // format: command name, byte offset, bit nr in 64-byte supported commands 146 // currently stored in 32-bit variable 147 #define SUPPORTED_HCI_COMMANDS \ 148 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 149 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 150 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 151 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 152 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 153 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 154 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 155 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 156 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 157 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 158 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 159 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 160 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 161 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 162 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 163 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 164 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 165 166 // enumerate supported commands 167 #define X(name, offset, bit) name, 168 enum { 169 SUPPORTED_HCI_COMMANDS 170 SUPPORTED_HCI_COMMANDS_COUNT 171 }; 172 #undef X 173 174 // prototypes 175 #ifdef ENABLE_CLASSIC 176 static void hci_update_scan_enable(void); 177 static void hci_emit_discoverable_enabled(uint8_t enabled); 178 static int hci_local_ssp_activated(void); 179 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 180 static bool hci_ssp_supported(hci_connection_t * connection); 181 static void hci_notify_if_sco_can_send_now(void); 182 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 183 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 184 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 185 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 186 static void hci_connection_timestamp(hci_connection_t *connection); 187 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 188 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 189 #endif 190 191 static int hci_power_control_on(void); 192 static void hci_power_control_off(void); 193 static void hci_state_reset(void); 194 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 195 static void hci_emit_transport_packet_sent(void); 196 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 197 static void hci_emit_nr_connections_changed(void); 198 static void hci_emit_hci_open_failed(void); 199 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 200 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 201 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 202 static void hci_run(void); 203 static int hci_is_le_connection(hci_connection_t * connection); 204 205 #ifdef ENABLE_CLASSIC 206 static int hci_have_usb_transport(void); 207 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 208 #endif 209 210 #ifdef ENABLE_BLE 211 static void hci_whitelist_free(void); 212 #ifdef ENABLE_LE_CENTRAL 213 // called from test/ble_client/advertising_data_parser.c 214 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 215 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 216 static hci_connection_t * gap_get_outgoing_connection(void); 217 static void hci_le_scan_stop(void); 218 static bool hci_run_general_gap_le(void); 219 #endif 220 #ifdef ENABLE_LE_PERIPHERAL 221 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 222 static void hci_periodic_advertiser_list_free(void); 223 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 224 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 225 #endif /* ENABLE_LE_PERIPHERAL */ 226 #endif /* ENABLE_BLE */ 227 228 // the STACK is here 229 #ifndef HAVE_MALLOC 230 static hci_stack_t hci_stack_static; 231 #endif 232 static hci_stack_t * hci_stack = NULL; 233 234 #ifdef ENABLE_CLASSIC 235 // default name 236 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 237 238 // test helper 239 static uint8_t disable_l2cap_timeouts = 0; 240 #endif 241 242 // reset connection state on create and on reconnect 243 // don't overwrite addr, con handle, role 244 static void hci_connection_init(hci_connection_t * conn){ 245 conn->authentication_flags = AUTH_FLAG_NONE; 246 conn->bonding_flags = 0; 247 conn->requested_security_level = LEVEL_0; 248 #ifdef ENABLE_CLASSIC 249 conn->request_role = HCI_ROLE_INVALID; 250 conn->sniff_subrating_max_latency = 0xffff; 251 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 252 conn->link_key_type = INVALID_LINK_KEY; 253 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 254 btstack_run_loop_set_timer_context(&conn->timeout, conn); 255 hci_connection_timestamp(conn); 256 #endif 257 conn->acl_recombination_length = 0; 258 conn->acl_recombination_pos = 0; 259 conn->num_packets_sent = 0; 260 261 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 262 #ifdef ENABLE_BLE 263 conn->le_phy_update_all_phys = 0xff; 264 #endif 265 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 266 conn->le_max_tx_octets = 27; 267 #endif 268 #ifdef ENABLE_CLASSIC_PAIRING_OOB 269 conn->classic_oob_c_192 = NULL; 270 conn->classic_oob_r_192 = NULL; 271 conn->classic_oob_c_256 = NULL; 272 conn->classic_oob_r_256 = NULL; 273 #endif 274 } 275 276 /** 277 * create connection for given address 278 * 279 * @return connection OR NULL, if no memory left 280 */ 281 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 282 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 283 284 hci_connection_t * conn = btstack_memory_hci_connection_get(); 285 if (!conn) return NULL; 286 hci_connection_init(conn); 287 288 bd_addr_copy(conn->address, addr); 289 conn->address_type = addr_type; 290 conn->con_handle = HCI_CON_HANDLE_INVALID; 291 conn->role = HCI_ROLE_INVALID; 292 293 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 294 295 return conn; 296 } 297 298 299 /** 300 * get le connection parameter range 301 * 302 * @return le connection parameter range struct 303 */ 304 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 305 *range = hci_stack->le_connection_parameter_range; 306 } 307 308 /** 309 * set le connection parameter range 310 * 311 */ 312 313 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 314 hci_stack->le_connection_parameter_range = *range; 315 } 316 317 /** 318 * @brief Test if connection parameters are inside in existing rage 319 * @param conn_interval_min (unit: 1.25ms) 320 * @param conn_interval_max (unit: 1.25ms) 321 * @param conn_latency 322 * @param supervision_timeout (unit: 10ms) 323 * @return 1 if included 324 */ 325 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){ 326 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 327 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 328 329 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 330 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 331 332 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 333 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 334 335 return 1; 336 } 337 338 /** 339 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 340 * @note: default: 1 341 * @param max_peripheral_connections 342 */ 343 #ifdef ENABLE_LE_PERIPHERAL 344 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 345 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 346 } 347 #endif 348 349 /** 350 * get hci connections iterator 351 * 352 * @return hci connections iterator 353 */ 354 355 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 356 btstack_linked_list_iterator_init(it, &hci_stack->connections); 357 } 358 359 /** 360 * get connection for a given handle 361 * 362 * @return connection OR NULL, if not found 363 */ 364 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 365 btstack_linked_list_iterator_t it; 366 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 367 while (btstack_linked_list_iterator_has_next(&it)){ 368 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 369 if ( item->con_handle == con_handle ) { 370 return item; 371 } 372 } 373 return NULL; 374 } 375 376 /** 377 * get connection for given address 378 * 379 * @return connection OR NULL, if not found 380 */ 381 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 382 btstack_linked_list_iterator_t it; 383 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 384 while (btstack_linked_list_iterator_has_next(&it)){ 385 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 386 if (connection->address_type != addr_type) continue; 387 if (memcmp(addr, connection->address, 6) != 0) continue; 388 return connection; 389 } 390 return NULL; 391 } 392 393 #ifdef ENABLE_CLASSIC 394 395 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 396 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 397 } 398 399 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 400 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 401 } 402 403 #ifdef ENABLE_SCO_OVER_HCI 404 static int hci_number_sco_connections(void){ 405 int connections = 0; 406 btstack_linked_list_iterator_t it; 407 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 408 while (btstack_linked_list_iterator_has_next(&it)){ 409 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 410 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 411 connections++; 412 } 413 return connections; 414 } 415 #endif 416 417 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 418 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 419 #ifdef HAVE_EMBEDDED_TICK 420 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 421 // connections might be timed out 422 hci_emit_l2cap_check_timeout(connection); 423 } 424 #else 425 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 426 // connections might be timed out 427 hci_emit_l2cap_check_timeout(connection); 428 } 429 #endif 430 } 431 432 static void hci_connection_timestamp(hci_connection_t *connection){ 433 #ifdef HAVE_EMBEDDED_TICK 434 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 435 #else 436 connection->timestamp = btstack_run_loop_get_time_ms(); 437 #endif 438 } 439 440 /** 441 * add authentication flags and reset timer 442 * @note: assumes classic connection 443 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 444 */ 445 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 446 bd_addr_t addr; 447 reverse_bd_addr(bd_addr, addr); 448 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 449 if (conn) { 450 connectionSetAuthenticationFlags(conn, flags); 451 hci_connection_timestamp(conn); 452 } 453 } 454 455 static bool hci_pairing_active(hci_connection_t * hci_connection){ 456 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 457 } 458 459 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 460 if (hci_pairing_active(hci_connection)) return; 461 if (ssp){ 462 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 463 } else { 464 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 465 } 466 // if we are initiator, we have sent an HCI Authenticate Request 467 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 468 469 // if we are responder, use minimal service security level as required level 470 if (!initiator){ 471 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); 472 } 473 474 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 475 476 uint8_t event[12]; 477 event[0] = GAP_EVENT_PAIRING_STARTED; 478 event[1] = 10; 479 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 480 reverse_bd_addr(hci_connection->address, &event[4]); 481 event[10] = (uint8_t) ssp; 482 event[11] = (uint8_t) initiator; 483 hci_emit_event(event, sizeof(event), 1); 484 } 485 486 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 487 hci_connection->requested_security_level = LEVEL_0; 488 if (!hci_pairing_active(hci_connection)) return; 489 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 490 #ifdef ENABLE_CLASSIC_PAIRING_OOB 491 hci_connection->classic_oob_c_192 = NULL; 492 hci_connection->classic_oob_r_192 = NULL; 493 hci_connection->classic_oob_c_256 = NULL; 494 hci_connection->classic_oob_r_256 = NULL; 495 #endif 496 log_info("pairing complete, status %02x", status); 497 498 uint8_t event[11]; 499 event[0] = GAP_EVENT_PAIRING_COMPLETE; 500 event[1] = 9; 501 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 502 reverse_bd_addr(hci_connection->address, &event[4]); 503 event[10] = status; 504 hci_emit_event(event, sizeof(event), 1); 505 506 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 507 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 508 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 509 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 510 hci_connection->bonding_status = status; 511 } 512 } 513 514 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 515 hci_connection_t * conn = hci_connection_for_handle(handle); 516 if (!conn) return false; 517 return hci_pairing_active(conn); 518 } 519 520 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 521 if (!hci_stack->link_key_db) return; 522 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 523 hci_stack->link_key_db->delete_link_key(addr); 524 } 525 526 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 527 if (!hci_stack->link_key_db) return; 528 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 529 hci_stack->link_key_db->put_link_key(addr, link_key, type); 530 } 531 532 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 533 if (!hci_stack->link_key_db) return false; 534 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 535 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 536 return result; 537 } 538 539 void gap_delete_all_link_keys(void){ 540 bd_addr_t addr; 541 link_key_t link_key; 542 link_key_type_t type; 543 btstack_link_key_iterator_t it; 544 int ok = gap_link_key_iterator_init(&it); 545 if (!ok) { 546 log_error("could not initialize iterator"); 547 return; 548 } 549 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 550 gap_drop_link_key_for_bd_addr(addr); 551 } 552 gap_link_key_iterator_done(&it); 553 } 554 555 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 556 if (!hci_stack->link_key_db) return 0; 557 if (!hci_stack->link_key_db->iterator_init) return 0; 558 return hci_stack->link_key_db->iterator_init(it); 559 } 560 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){ 561 if (!hci_stack->link_key_db) return 0; 562 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 563 } 564 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 565 if (!hci_stack->link_key_db) return; 566 hci_stack->link_key_db->iterator_done(it); 567 } 568 #endif 569 570 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 571 switch (address_type){ 572 case BD_ADDR_TYPE_LE_PUBLIC: 573 case BD_ADDR_TYPE_LE_RANDOM: 574 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 575 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 576 return true; 577 default: 578 return false; 579 } 580 } 581 582 static int hci_is_le_connection(hci_connection_t * connection){ 583 return hci_is_le_connection_type(connection->address_type); 584 } 585 586 /** 587 * count connections 588 */ 589 static int nr_hci_connections(void){ 590 int count = 0; 591 btstack_linked_item_t *it; 592 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 593 count++; 594 } 595 return count; 596 } 597 598 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 599 600 unsigned int num_packets_sent_classic = 0; 601 unsigned int num_packets_sent_le = 0; 602 603 btstack_linked_item_t *it; 604 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 605 hci_connection_t * connection = (hci_connection_t *) it; 606 if (hci_is_le_connection(connection)){ 607 num_packets_sent_le += connection->num_packets_sent; 608 } 609 if (connection->address_type == BD_ADDR_TYPE_ACL){ 610 num_packets_sent_classic += connection->num_packets_sent; 611 } 612 } 613 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 614 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 615 int free_slots_le = 0; 616 617 if (free_slots_classic < 0){ 618 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); 619 return 0; 620 } 621 622 if (hci_stack->le_acl_packets_total_num){ 623 // if we have LE slots, they are used 624 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 625 if (free_slots_le < 0){ 626 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); 627 return 0; 628 } 629 } else { 630 // otherwise, classic slots are used for LE, too 631 free_slots_classic -= num_packets_sent_le; 632 if (free_slots_classic < 0){ 633 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); 634 return 0; 635 } 636 } 637 638 switch (address_type){ 639 case BD_ADDR_TYPE_UNKNOWN: 640 log_error("hci_number_free_acl_slots: unknown address type"); 641 return 0; 642 643 case BD_ADDR_TYPE_ACL: 644 return (uint16_t) free_slots_classic; 645 646 default: 647 if (hci_stack->le_acl_packets_total_num > 0){ 648 return (uint16_t) free_slots_le; 649 } 650 return (uint16_t) free_slots_classic; 651 } 652 } 653 654 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 655 // get connection type 656 hci_connection_t * connection = hci_connection_for_handle(con_handle); 657 if (!connection){ 658 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 659 return 0; 660 } 661 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 662 } 663 664 #ifdef ENABLE_CLASSIC 665 static int hci_number_free_sco_slots(void){ 666 unsigned int num_sco_packets_sent = 0; 667 btstack_linked_item_t *it; 668 if (hci_stack->synchronous_flow_control_enabled){ 669 // explicit flow control 670 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 671 hci_connection_t * connection = (hci_connection_t *) it; 672 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 673 num_sco_packets_sent += connection->num_packets_sent; 674 } 675 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 676 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 677 return 0; 678 } 679 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 680 } else { 681 // implicit flow control -- TODO 682 int num_ready = 0; 683 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 684 hci_connection_t * connection = (hci_connection_t *) it; 685 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 686 if (connection->sco_tx_ready == 0) continue; 687 num_ready++; 688 } 689 return num_ready; 690 } 691 } 692 #endif 693 694 // only used to send HCI Host Number Completed Packets 695 static int hci_can_send_comand_packet_transport(void){ 696 if (hci_stack->hci_packet_buffer_reserved) return 0; 697 698 // check for async hci transport implementations 699 if (hci_stack->hci_transport->can_send_packet_now){ 700 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 701 return 0; 702 } 703 } 704 return 1; 705 } 706 707 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 708 bool hci_can_send_command_packet_now(void){ 709 if (hci_can_send_comand_packet_transport() == 0) return false; 710 return hci_stack->num_cmd_packets > 0u; 711 } 712 713 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 714 // check for async hci transport implementations 715 if (!hci_stack->hci_transport->can_send_packet_now) return true; 716 return hci_stack->hci_transport->can_send_packet_now(packet_type); 717 } 718 719 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 720 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 721 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 722 } 723 724 bool hci_can_send_acl_le_packet_now(void){ 725 if (hci_stack->hci_packet_buffer_reserved) return false; 726 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 727 } 728 729 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 730 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 731 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 732 } 733 734 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 735 if (hci_stack->hci_packet_buffer_reserved) return false; 736 return hci_can_send_prepared_acl_packet_now(con_handle); 737 } 738 739 #ifdef ENABLE_CLASSIC 740 bool hci_can_send_acl_classic_packet_now(void){ 741 if (hci_stack->hci_packet_buffer_reserved) return false; 742 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 743 } 744 745 bool hci_can_send_prepared_sco_packet_now(void){ 746 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 747 if (hci_have_usb_transport()){ 748 return hci_stack->sco_can_send_now; 749 } else { 750 return hci_number_free_sco_slots() > 0; 751 } 752 } 753 754 bool hci_can_send_sco_packet_now(void){ 755 if (hci_stack->hci_packet_buffer_reserved) return false; 756 return hci_can_send_prepared_sco_packet_now(); 757 } 758 759 void hci_request_sco_can_send_now_event(void){ 760 hci_stack->sco_waiting_for_can_send_now = 1; 761 hci_notify_if_sco_can_send_now(); 762 } 763 #endif 764 765 // used for internal checks in l2cap.c 766 bool hci_is_packet_buffer_reserved(void){ 767 return hci_stack->hci_packet_buffer_reserved; 768 } 769 770 // reserves outgoing packet buffer. 771 // @return 1 if successful 772 bool hci_reserve_packet_buffer(void){ 773 if (hci_stack->hci_packet_buffer_reserved) { 774 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 775 return false; 776 } 777 hci_stack->hci_packet_buffer_reserved = true; 778 return true; 779 } 780 781 void hci_release_packet_buffer(void){ 782 hci_stack->hci_packet_buffer_reserved = false; 783 } 784 785 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 786 static int hci_transport_synchronous(void){ 787 return hci_stack->hci_transport->can_send_packet_now == NULL; 788 } 789 790 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 791 792 // 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); 793 794 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 795 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 796 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 797 max_acl_data_packet_length = hci_stack->le_data_packets_length; 798 } 799 800 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 801 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 802 max_acl_data_packet_length = connection->le_max_tx_octets; 803 } 804 #endif 805 806 log_debug("hci_send_acl_packet_fragments entered"); 807 808 uint8_t status = ERROR_CODE_SUCCESS; 809 // multiple packets could be send on a synchronous HCI transport 810 while (true){ 811 812 log_debug("hci_send_acl_packet_fragments loop entered"); 813 814 // get current data 815 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 816 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 817 bool more_fragments = false; 818 819 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 820 if (current_acl_data_packet_length > max_acl_data_packet_length){ 821 more_fragments = true; 822 current_acl_data_packet_length = max_acl_data_packet_length; 823 } 824 825 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 826 if (acl_header_pos > 0u){ 827 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 828 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 829 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 830 } 831 832 // update header len 833 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 834 835 // count packet 836 connection->num_packets_sent++; 837 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 838 839 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 840 if (more_fragments){ 841 // update start of next fragment to send 842 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 843 } else { 844 // done 845 hci_stack->acl_fragmentation_pos = 0; 846 hci_stack->acl_fragmentation_total_size = 0; 847 } 848 849 // send packet 850 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 851 const int size = current_acl_data_packet_length + 4; 852 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 853 hci_stack->acl_fragmentation_tx_active = 1; 854 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 855 if (err != 0){ 856 // no error from HCI Transport expected 857 status = ERROR_CODE_HARDWARE_FAILURE; 858 } 859 860 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 861 862 // done yet? 863 if (!more_fragments) break; 864 865 // can send more? 866 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 867 } 868 869 log_debug("hci_send_acl_packet_fragments loop over"); 870 871 // release buffer now for synchronous transport 872 if (hci_transport_synchronous()){ 873 hci_stack->acl_fragmentation_tx_active = 0; 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 } 877 878 return status; 879 } 880 881 // pre: caller has reserved the packet buffer 882 uint8_t hci_send_acl_packet_buffer(int size){ 883 btstack_assert(hci_stack->hci_packet_buffer_reserved); 884 885 uint8_t * packet = hci_stack->hci_packet_buffer; 886 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 887 888 // check for free places on Bluetooth module 889 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 890 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 891 hci_release_packet_buffer(); 892 hci_emit_transport_packet_sent(); 893 return BTSTACK_ACL_BUFFERS_FULL; 894 } 895 896 hci_connection_t *connection = hci_connection_for_handle( con_handle); 897 if (!connection) { 898 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 899 hci_release_packet_buffer(); 900 hci_emit_transport_packet_sent(); 901 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 902 } 903 904 #ifdef ENABLE_CLASSIC 905 hci_connection_timestamp(connection); 906 #endif 907 908 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 909 910 // setup data 911 hci_stack->acl_fragmentation_total_size = size; 912 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 913 914 return hci_send_acl_packet_fragments(connection); 915 } 916 917 #ifdef ENABLE_CLASSIC 918 // pre: caller has reserved the packet buffer 919 uint8_t hci_send_sco_packet_buffer(int size){ 920 btstack_assert(hci_stack->hci_packet_buffer_reserved); 921 922 uint8_t * packet = hci_stack->hci_packet_buffer; 923 924 // skip checks in loopback mode 925 if (!hci_stack->loopback_mode){ 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 927 928 // check for free places on Bluetooth module 929 if (!hci_can_send_prepared_sco_packet_now()) { 930 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 931 hci_release_packet_buffer(); 932 hci_emit_transport_packet_sent(); 933 return BTSTACK_ACL_BUFFERS_FULL; 934 } 935 936 // track send packet in connection struct 937 hci_connection_t *connection = hci_connection_for_handle( con_handle); 938 if (!connection) { 939 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 940 hci_release_packet_buffer(); 941 hci_emit_transport_packet_sent(); 942 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 943 } 944 945 if (hci_have_usb_transport()){ 946 // token used 947 hci_stack->sco_can_send_now = false; 948 } else { 949 if (hci_stack->synchronous_flow_control_enabled){ 950 connection->num_packets_sent++; 951 } else { 952 connection->sco_tx_ready--; 953 } 954 } 955 } 956 957 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 958 959 #ifdef HAVE_SCO_TRANSPORT 960 hci_stack->sco_transport->send_packet(packet, size); 961 hci_release_packet_buffer(); 962 hci_emit_transport_packet_sent(); 963 964 return 0; 965 #else 966 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 967 if (hci_transport_synchronous()){ 968 hci_release_packet_buffer(); 969 hci_emit_transport_packet_sent(); 970 } 971 972 if (err != 0){ 973 return ERROR_CODE_HARDWARE_FAILURE; 974 } 975 return ERROR_CODE_SUCCESS; 976 #endif 977 } 978 #endif 979 980 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 981 static uint8_t hci_send_iso_packet_fragments(void){ 982 983 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 984 uint8_t status = ERROR_CODE_SUCCESS; 985 // multiple packets could be send on a synchronous HCI transport 986 while (true){ 987 988 // get current data 989 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 990 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 991 bool more_fragments = false; 992 993 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 994 if (current_iso_data_packet_length > max_iso_data_packet_length){ 995 more_fragments = true; 996 current_iso_data_packet_length = max_iso_data_packet_length; 997 } 998 999 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1000 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1001 uint8_t pb_flags; 1002 if (iso_header_pos == 0u){ 1003 // first fragment, keep TS field 1004 pb_flags = more_fragments ? 0x00 : 0x02; 1005 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1006 } else { 1007 // later fragment, drop TS field 1008 pb_flags = more_fragments ? 0x01 : 0x03; 1009 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1010 } 1011 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1012 1013 // update header len 1014 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1015 1016 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1017 if (more_fragments){ 1018 // update start of next fragment to send 1019 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1020 } else { 1021 // done 1022 hci_stack->iso_fragmentation_pos = 0; 1023 hci_stack->iso_fragmentation_total_size = 0; 1024 } 1025 1026 // send packet 1027 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1028 const int size = current_iso_data_packet_length + 4; 1029 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1030 hci_stack->iso_fragmentation_tx_active = true; 1031 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1032 if (err != 0){ 1033 // no error from HCI Transport expected 1034 status = ERROR_CODE_HARDWARE_FAILURE; 1035 } 1036 1037 // done yet? 1038 if (!more_fragments) break; 1039 1040 // can send more? 1041 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1042 } 1043 1044 // release buffer now for synchronous transport 1045 if (hci_transport_synchronous()){ 1046 hci_stack->iso_fragmentation_tx_active = false; 1047 hci_release_packet_buffer(); 1048 hci_emit_transport_packet_sent(); 1049 } 1050 1051 return status; 1052 } 1053 1054 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1055 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1056 1057 // setup data 1058 hci_stack->iso_fragmentation_total_size = size; 1059 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1060 1061 // TODO: check for space on controller 1062 // TODO: track outgoing packet sent 1063 1064 return hci_send_iso_packet_fragments(); 1065 } 1066 #endif 1067 1068 static void acl_handler(uint8_t *packet, uint16_t size){ 1069 1070 // get info 1071 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1072 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1073 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1074 uint16_t acl_length = READ_ACL_LENGTH(packet); 1075 1076 // ignore non-registered handle 1077 if (!conn){ 1078 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1079 return; 1080 } 1081 1082 // assert packet is complete 1083 if ((acl_length + 4u) != size){ 1084 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1085 return; 1086 } 1087 1088 #ifdef ENABLE_CLASSIC 1089 // update idle timestamp 1090 hci_connection_timestamp(conn); 1091 #endif 1092 1093 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1094 hci_stack->host_completed_packets = 1; 1095 conn->num_packets_completed++; 1096 #endif 1097 1098 // handle different packet types 1099 switch (acl_flags & 0x03u) { 1100 1101 case 0x01: // continuation fragment 1102 1103 // sanity checks 1104 if (conn->acl_recombination_pos == 0u) { 1105 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1106 return; 1107 } 1108 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1109 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1110 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1111 conn->acl_recombination_pos = 0; 1112 return; 1113 } 1114 1115 // append fragment payload (header already stored) 1116 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1117 &packet[4], acl_length); 1118 conn->acl_recombination_pos += acl_length; 1119 1120 // forward complete L2CAP packet if complete. 1121 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1122 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1123 // reset recombination buffer 1124 conn->acl_recombination_length = 0; 1125 conn->acl_recombination_pos = 0; 1126 } 1127 break; 1128 1129 case 0x02: { // first fragment 1130 1131 // sanity check 1132 if (conn->acl_recombination_pos) { 1133 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1134 conn->acl_recombination_pos = 0; 1135 } 1136 1137 // peek into L2CAP packet! 1138 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1139 1140 // compare fragment size to L2CAP packet size 1141 if (acl_length >= (l2cap_length + 4u)){ 1142 // forward fragment as L2CAP packet 1143 hci_emit_acl_packet(packet, acl_length + 4u); 1144 } else { 1145 1146 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1147 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1148 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1149 return; 1150 } 1151 1152 // store first fragment and tweak acl length for complete package 1153 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1154 packet, acl_length + 4u); 1155 conn->acl_recombination_pos = acl_length + 4u; 1156 conn->acl_recombination_length = l2cap_length; 1157 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1158 } 1159 break; 1160 1161 } 1162 default: 1163 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1164 return; 1165 } 1166 1167 // execute main loop 1168 hci_run(); 1169 } 1170 1171 static void hci_connection_stop_timer(hci_connection_t * conn){ 1172 btstack_run_loop_remove_timer(&conn->timeout); 1173 #ifdef ENABLE_CLASSIC 1174 btstack_run_loop_remove_timer(&conn->timeout_sco); 1175 #endif 1176 } 1177 1178 static void hci_shutdown_connection(hci_connection_t *conn){ 1179 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1180 1181 #ifdef ENABLE_CLASSIC 1182 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1183 bd_addr_type_t addr_type = conn->address_type; 1184 #endif 1185 #ifdef HAVE_SCO_TRANSPORT 1186 hci_con_handle_t con_handle = conn->con_handle; 1187 #endif 1188 #endif 1189 1190 hci_connection_stop_timer(conn); 1191 1192 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1193 btstack_memory_hci_connection_free( conn ); 1194 1195 // now it's gone 1196 hci_emit_nr_connections_changed(); 1197 1198 #ifdef ENABLE_CLASSIC 1199 #ifdef ENABLE_SCO_OVER_HCI 1200 // update SCO 1201 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1202 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1203 } 1204 #endif 1205 #ifdef HAVE_SCO_TRANSPORT 1206 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1207 hci_stack->sco_transport->close(con_handle); 1208 } 1209 #endif 1210 #endif 1211 } 1212 1213 #ifdef ENABLE_CLASSIC 1214 1215 static const uint16_t packet_type_sizes[] = { 1216 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1217 HCI_ACL_DH1_SIZE, 0, 0, 0, 1218 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1219 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1220 }; 1221 static const uint8_t packet_type_feature_requirement_bit[] = { 1222 0, // 3 slot packets 1223 1, // 5 slot packets 1224 25, // EDR 2 mpbs 1225 26, // EDR 3 mbps 1226 39, // 3 slot EDR packts 1227 40, // 5 slot EDR packet 1228 }; 1229 static const uint16_t packet_type_feature_packet_mask[] = { 1230 0x0f00, // 3 slot packets 1231 0xf000, // 5 slot packets 1232 0x1102, // EDR 2 mpbs 1233 0x2204, // EDR 3 mbps 1234 0x0300, // 3 slot EDR packts 1235 0x3000, // 5 slot EDR packet 1236 }; 1237 1238 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1239 // enable packet types based on size 1240 uint16_t packet_types = 0; 1241 unsigned int i; 1242 for (i=0;i<16;i++){ 1243 if (packet_type_sizes[i] == 0) continue; 1244 if (packet_type_sizes[i] <= buffer_size){ 1245 packet_types |= 1 << i; 1246 } 1247 } 1248 // disable packet types due to missing local supported features 1249 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1250 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1251 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1252 if (feature_set) continue; 1253 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1254 packet_types &= ~packet_type_feature_packet_mask[i]; 1255 } 1256 // flip bits for "may not be used" 1257 packet_types ^= 0x3306; 1258 return packet_types; 1259 } 1260 1261 uint16_t hci_usable_acl_packet_types(void){ 1262 return hci_stack->packet_types; 1263 } 1264 #endif 1265 1266 uint8_t* hci_get_outgoing_packet_buffer(void){ 1267 // hci packet buffer is >= acl data packet length 1268 return hci_stack->hci_packet_buffer; 1269 } 1270 1271 uint16_t hci_max_acl_data_packet_length(void){ 1272 return hci_stack->acl_data_packet_length; 1273 } 1274 1275 #ifdef ENABLE_CLASSIC 1276 bool hci_extended_sco_link_supported(void){ 1277 // No. 31, byte 3, bit 7 1278 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1279 } 1280 #endif 1281 1282 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1283 // No. 54, byte 6, bit 6 1284 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1285 } 1286 1287 #ifdef ENABLE_CLASSIC 1288 static int gap_ssp_supported(void){ 1289 // No. 51, byte 6, bit 3 1290 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1291 } 1292 #endif 1293 1294 static int hci_classic_supported(void){ 1295 #ifdef ENABLE_CLASSIC 1296 // No. 37, byte 4, bit 5, = No BR/EDR Support 1297 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1298 #else 1299 return 0; 1300 #endif 1301 } 1302 1303 static int hci_le_supported(void){ 1304 #ifdef ENABLE_BLE 1305 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1306 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1307 #else 1308 return 0; 1309 #endif 1310 } 1311 1312 static bool hci_command_supported(uint8_t command_index){ 1313 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1314 } 1315 1316 #ifdef ENABLE_BLE 1317 1318 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1319 static bool hci_extended_advertising_supported(void){ 1320 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1321 } 1322 #endif 1323 1324 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1325 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1326 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1327 } else { 1328 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1329 } 1330 } 1331 1332 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1333 *addr_type = hci_stack->le_own_addr_type; 1334 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1335 } 1336 1337 #ifdef ENABLE_LE_PERIPHERAL 1338 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1339 *addr_type = hci_stack->le_advertisements_own_addr_type; 1340 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1341 }; 1342 #endif 1343 1344 #ifdef ENABLE_LE_CENTRAL 1345 1346 /** 1347 * @brief Get own addr type and address used for LE connections (Central) 1348 */ 1349 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1350 *addr_type = hci_stack->le_connection_own_addr_type; 1351 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1352 } 1353 1354 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1355 1356 uint16_t offset = 3; 1357 uint8_t num_reports = packet[offset]; 1358 offset += 1; 1359 1360 uint16_t i; 1361 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1362 for (i=0; (i<num_reports) && (offset < size);i++){ 1363 // sanity checks on data_length: 1364 uint8_t data_length = packet[offset + 8]; 1365 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1366 if ((offset + 9u + data_length + 1u) > size) return; 1367 // setup event 1368 uint8_t event_size = 10u + data_length; 1369 uint16_t pos = 0; 1370 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1371 event[pos++] = event_size; 1372 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1373 offset += 8; 1374 pos += 8; 1375 event[pos++] = packet[offset + 1 + data_length]; // rssi 1376 event[pos++] = data_length; 1377 offset++; 1378 (void)memcpy(&event[pos], &packet[offset], data_length); 1379 pos += data_length; 1380 offset += data_length + 1u; // rssi 1381 hci_emit_event(event, pos, 1); 1382 } 1383 } 1384 1385 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1386 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1387 uint16_t offset = 3; 1388 uint8_t num_reports = packet[offset++]; 1389 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1390 uint8_t i; 1391 for (i=0; (i<num_reports) && (offset < size);i++){ 1392 // sanity checks on data_length: 1393 uint16_t data_length = packet[offset + 23]; 1394 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1395 if ((offset + 24u + data_length) > size) return; 1396 uint16_t event_type = little_endian_read_16(packet, offset); 1397 offset += 2; 1398 if ((event_type & 0x10) != 0) { 1399 // setup legacy event 1400 uint8_t legacy_event_type; 1401 switch (event_type){ 1402 case 0b0010011: 1403 // ADV_IND 1404 legacy_event_type = 0; 1405 break; 1406 case 0b0010101: 1407 // ADV_DIRECT_IND 1408 legacy_event_type = 1; 1409 break; 1410 case 0b0010010: 1411 // ADV_SCAN_IND 1412 legacy_event_type = 2; 1413 break; 1414 case 0b0010000: 1415 // ADV_NONCONN_IND 1416 legacy_event_type = 3; 1417 break; 1418 case 0b0011011: 1419 case 0b0011010: 1420 // SCAN_RSP 1421 legacy_event_type = 4; 1422 break; 1423 default: 1424 legacy_event_type = 0; 1425 break; 1426 } 1427 uint16_t pos = 0; 1428 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1429 event[pos++] = 10u + data_length; 1430 event[pos++] = legacy_event_type; 1431 // copy address type + address 1432 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1433 offset += 7; 1434 pos += 7; 1435 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1436 offset += 4; 1437 // copy rssi 1438 event[pos++] = packet[offset++]; 1439 // skip periodic advertising interval and direct address 1440 offset += 9; 1441 // copy data len + data; 1442 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1443 pos += 1 +data_length; 1444 offset += 1+ data_length; 1445 hci_emit_event(event, pos, 1); 1446 } else { 1447 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1448 uint8_t report_len = 24 + data_length; 1449 event[1] = report_len; 1450 little_endian_store_16(event, 2, event_type); 1451 memcpy(&event[4], &packet[offset], report_len); 1452 offset += report_len; 1453 hci_emit_event(event, 2 + report_len, 1); 1454 } 1455 } 1456 } 1457 #endif 1458 1459 #endif 1460 #endif 1461 1462 #ifdef ENABLE_BLE 1463 #ifdef ENABLE_LE_PERIPHERAL 1464 static void hci_update_advertisements_enabled_for_current_roles(void){ 1465 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1466 // get number of active le slave connections 1467 int num_slave_connections = 0; 1468 btstack_linked_list_iterator_t it; 1469 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1470 while (btstack_linked_list_iterator_has_next(&it)){ 1471 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1472 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1473 if (con->state != OPEN) continue; 1474 if (con->role != HCI_ROLE_SLAVE) continue; 1475 if (!hci_is_le_connection(con)) continue; 1476 num_slave_connections++; 1477 } 1478 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1479 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1480 } else { 1481 hci_stack->le_advertisements_enabled_for_current_roles = false; 1482 } 1483 } 1484 #endif 1485 #endif 1486 1487 #ifdef ENABLE_CLASSIC 1488 static void gap_run_set_local_name(void){ 1489 hci_reserve_packet_buffer(); 1490 uint8_t * packet = hci_stack->hci_packet_buffer; 1491 // construct HCI Command and send 1492 uint16_t opcode = hci_write_local_name.opcode; 1493 hci_stack->last_cmd_opcode = opcode; 1494 packet[0] = opcode & 0xff; 1495 packet[1] = opcode >> 8; 1496 packet[2] = DEVICE_NAME_LEN; 1497 memset(&packet[3], 0, DEVICE_NAME_LEN); 1498 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1499 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1500 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1501 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1502 // expand '00:00:00:00:00:00' in name with bd_addr 1503 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1504 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1505 } 1506 1507 static void gap_run_set_eir_data(void){ 1508 hci_reserve_packet_buffer(); 1509 uint8_t * packet = hci_stack->hci_packet_buffer; 1510 // construct HCI Command in-place and send 1511 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1512 hci_stack->last_cmd_opcode = opcode; 1513 uint16_t offset = 0; 1514 packet[offset++] = opcode & 0xff; 1515 packet[offset++] = opcode >> 8; 1516 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1517 packet[offset++] = 0; // FEC not required 1518 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1519 if (hci_stack->eir_data){ 1520 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1521 ad_context_t context; 1522 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1523 uint8_t data_type = ad_iterator_get_data_type(&context); 1524 uint8_t size = ad_iterator_get_data_len(&context); 1525 const uint8_t *data = ad_iterator_get_data(&context); 1526 // copy item 1527 packet[offset++] = size + 1; 1528 packet[offset++] = data_type; 1529 memcpy(&packet[offset], data, size); 1530 // update name item 1531 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1532 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1533 } 1534 offset += size; 1535 } 1536 } else { 1537 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1538 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1539 packet[offset++] = bytes_to_copy + 1; 1540 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1541 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1542 // expand '00:00:00:00:00:00' in name with bd_addr 1543 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1544 } 1545 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1546 } 1547 1548 static void hci_run_gap_tasks_classic(void){ 1549 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1550 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1551 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1552 return; 1553 } 1554 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1555 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1556 gap_run_set_local_name(); 1557 return; 1558 } 1559 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1560 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1561 gap_run_set_eir_data(); 1562 return; 1563 } 1564 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1565 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1566 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1567 return; 1568 } 1569 // write page scan activity 1570 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1571 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1572 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1573 return; 1574 } 1575 // write page scan type 1576 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1577 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1578 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1579 return; 1580 } 1581 // write page timeout 1582 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1583 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1584 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1585 return; 1586 } 1587 // send scan enable 1588 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1589 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1590 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1591 return; 1592 } 1593 // send write scan activity 1594 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1595 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1596 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1597 return; 1598 } 1599 } 1600 #endif 1601 1602 #ifndef HAVE_HOST_CONTROLLER_API 1603 1604 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1605 if (!hci_stack->config) return 0; 1606 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1607 // Limit baud rate for Broadcom chipsets to 3 mbps 1608 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1609 baud_rate = 3000000; 1610 } 1611 return baud_rate; 1612 } 1613 1614 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1615 UNUSED(ds); 1616 1617 switch (hci_stack->substate){ 1618 case HCI_INIT_W4_SEND_RESET: 1619 log_info("Resend HCI Reset"); 1620 hci_stack->substate = HCI_INIT_SEND_RESET; 1621 hci_stack->num_cmd_packets = 1; 1622 hci_run(); 1623 break; 1624 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1625 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1626 if (hci_stack->hci_transport->reset_link){ 1627 hci_stack->hci_transport->reset_link(); 1628 } 1629 1630 /* fall through */ 1631 1632 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1633 log_info("Resend HCI Reset - CSR Warm Boot"); 1634 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1635 hci_stack->num_cmd_packets = 1; 1636 hci_run(); 1637 break; 1638 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1639 if (hci_stack->hci_transport->set_baudrate){ 1640 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1641 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1642 hci_stack->hci_transport->set_baudrate(baud_rate); 1643 } 1644 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1645 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1646 if (hci_stack->hci_transport->reset_link){ 1647 log_info("Link Reset"); 1648 hci_stack->hci_transport->reset_link(); 1649 } 1650 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1651 hci_run(); 1652 } 1653 break; 1654 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1655 // otherwise continue 1656 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1657 hci_send_cmd(&hci_read_local_supported_commands); 1658 break; 1659 default: 1660 break; 1661 } 1662 } 1663 #endif 1664 1665 static void hci_initializing_next_state(void){ 1666 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1667 } 1668 1669 static void hci_init_done(void){ 1670 // done. tell the app 1671 log_info("hci_init_done -> HCI_STATE_WORKING"); 1672 hci_stack->state = HCI_STATE_WORKING; 1673 hci_emit_state(); 1674 } 1675 1676 // assumption: hci_can_send_command_packet_now() == true 1677 static void hci_initializing_run(void){ 1678 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1679 1680 if (!hci_can_send_command_packet_now()) return; 1681 1682 #ifndef HAVE_HOST_CONTROLLER_API 1683 bool need_baud_change = hci_stack->config 1684 && hci_stack->chipset 1685 && hci_stack->chipset->set_baudrate_command 1686 && hci_stack->hci_transport->set_baudrate 1687 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1688 #endif 1689 1690 switch (hci_stack->substate){ 1691 case HCI_INIT_SEND_RESET: 1692 hci_state_reset(); 1693 1694 #ifndef HAVE_HOST_CONTROLLER_API 1695 // prepare reset if command complete not received in 100ms 1696 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1697 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1698 btstack_run_loop_add_timer(&hci_stack->timeout); 1699 #endif 1700 // send command 1701 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1702 hci_send_cmd(&hci_reset); 1703 break; 1704 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1705 hci_send_cmd(&hci_read_local_version_information); 1706 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1707 break; 1708 1709 #ifndef HAVE_HOST_CONTROLLER_API 1710 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1711 hci_state_reset(); 1712 // prepare reset if command complete not received in 100ms 1713 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1714 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1715 btstack_run_loop_add_timer(&hci_stack->timeout); 1716 // send command 1717 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1718 hci_send_cmd(&hci_reset); 1719 break; 1720 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1721 hci_state_reset(); 1722 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1723 hci_send_cmd(&hci_reset); 1724 break; 1725 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1726 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1727 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1728 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1729 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1730 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1731 break; 1732 } 1733 case HCI_INIT_SET_BD_ADDR: 1734 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1735 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1736 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1737 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1738 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1739 break; 1740 case HCI_INIT_SEND_READ_LOCAL_NAME: 1741 #ifdef ENABLE_CLASSIC 1742 hci_send_cmd(&hci_read_local_name); 1743 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1744 break; 1745 #endif 1746 /* fall through */ 1747 1748 case HCI_INIT_SEND_BAUD_CHANGE: 1749 if (need_baud_change) { 1750 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1751 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1752 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1753 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1754 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1755 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1756 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1757 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1758 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1759 btstack_run_loop_add_timer(&hci_stack->timeout); 1760 } 1761 break; 1762 } 1763 1764 /* fall through */ 1765 1766 case HCI_INIT_CUSTOM_INIT: 1767 // Custom initialization 1768 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1769 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1770 bool send_cmd = false; 1771 switch (hci_stack->chipset_result){ 1772 case BTSTACK_CHIPSET_VALID_COMMAND: 1773 send_cmd = true; 1774 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1775 break; 1776 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1777 send_cmd = true; 1778 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1779 log_info("CSR Warm Boot"); 1780 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1781 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1782 btstack_run_loop_add_timer(&hci_stack->timeout); 1783 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1784 && hci_stack->config 1785 && hci_stack->chipset 1786 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1787 && hci_stack->hci_transport->set_baudrate 1788 && hci_transport_uart_get_main_baud_rate()){ 1789 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1790 } else { 1791 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1792 } 1793 break; 1794 default: 1795 break; 1796 } 1797 1798 if (send_cmd){ 1799 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1800 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1801 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1802 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1803 break; 1804 } 1805 log_info("Init script done"); 1806 1807 // Init script download on Broadcom chipsets causes: 1808 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1809 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1810 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1811 1812 // - baud rate to reset, restore UART baud rate if needed 1813 if (need_baud_change) { 1814 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1815 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1816 hci_stack->hci_transport->set_baudrate(baud_rate); 1817 } 1818 1819 uint16_t bcm_delay_ms = 300; 1820 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1821 // -> Work around: wait here. 1822 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1823 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1824 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1825 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1826 btstack_run_loop_add_timer(&hci_stack->timeout); 1827 break; 1828 } 1829 } 1830 #endif 1831 /* fall through */ 1832 1833 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1834 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1835 hci_send_cmd(&hci_read_local_supported_commands); 1836 break; 1837 case HCI_INIT_READ_BD_ADDR: 1838 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1839 hci_send_cmd(&hci_read_bd_addr); 1840 break; 1841 case HCI_INIT_READ_BUFFER_SIZE: 1842 // only read buffer size if supported 1843 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1844 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1845 hci_send_cmd(&hci_read_buffer_size); 1846 break; 1847 } 1848 1849 /* fall through */ 1850 1851 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1852 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1853 hci_send_cmd(&hci_read_local_supported_features); 1854 break; 1855 1856 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1857 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1858 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1859 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1860 break; 1861 case HCI_INIT_HOST_BUFFER_SIZE: 1862 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1863 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1864 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1865 break; 1866 #endif 1867 1868 case HCI_INIT_SET_EVENT_MASK: 1869 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1870 if (hci_le_supported()){ 1871 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1872 } else { 1873 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1874 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1875 } 1876 break; 1877 1878 case HCI_INIT_SET_EVENT_MASK_2: 1879 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2)){ 1880 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1881 // Encryption Change Event v2 - bit 25 1882 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1883 break; 1884 } 1885 1886 #ifdef ENABLE_CLASSIC 1887 /* fall through */ 1888 1889 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1890 if (hci_classic_supported() && gap_ssp_supported()){ 1891 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1892 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1893 break; 1894 } 1895 1896 /* fall through */ 1897 1898 case HCI_INIT_WRITE_INQUIRY_MODE: 1899 if (hci_classic_supported()){ 1900 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1901 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1902 break; 1903 } 1904 1905 /* fall through */ 1906 1907 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1908 // skip write secure connections host support if not supported or disabled 1909 if (hci_classic_supported() && hci_stack->secure_connections_enable 1910 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1911 hci_stack->secure_connections_active = true; 1912 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1913 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1914 break; 1915 } 1916 1917 /* fall through */ 1918 1919 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1920 // skip set min encryption key size 1921 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1922 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1923 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1924 break; 1925 } 1926 1927 #ifdef ENABLE_SCO_OVER_HCI 1928 /* fall through */ 1929 1930 // only sent if ENABLE_SCO_OVER_HCI is defined 1931 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1932 // skip write synchronous flow control if not supported 1933 if (hci_classic_supported() 1934 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1935 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1936 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1937 break; 1938 } 1939 /* fall through */ 1940 1941 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1942 // skip write default erroneous data reporting if not supported 1943 if (hci_classic_supported() 1944 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1945 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1946 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1947 break; 1948 } 1949 #endif 1950 1951 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1952 /* fall through */ 1953 1954 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1955 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1956 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1957 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1958 #ifdef ENABLE_SCO_OVER_HCI 1959 log_info("BCM: Route SCO data via HCI transport"); 1960 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1961 #endif 1962 #ifdef ENABLE_SCO_OVER_PCM 1963 log_info("BCM: Route SCO data via PCM interface"); 1964 #ifdef ENABLE_BCM_PCM_WBS 1965 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1966 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1967 #else 1968 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1969 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1970 #endif 1971 #endif 1972 break; 1973 } 1974 #endif 1975 1976 #ifdef ENABLE_SCO_OVER_PCM 1977 /* fall through */ 1978 1979 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1980 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1981 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1982 log_info("BCM: Config PCM interface for I2S"); 1983 #ifdef ENABLE_BCM_PCM_WBS 1984 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1985 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1986 #else 1987 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1988 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1989 #endif 1990 break; 1991 } 1992 #endif 1993 #endif 1994 1995 #ifdef ENABLE_BLE 1996 /* fall through */ 1997 1998 // LE INIT 1999 case HCI_INIT_LE_READ_BUFFER_SIZE: 2000 if (hci_le_supported()){ 2001 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2002 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2003 hci_send_cmd(&hci_le_read_buffer_size_v2); 2004 } else { 2005 hci_send_cmd(&hci_le_read_buffer_size); 2006 } 2007 break; 2008 } 2009 2010 /* fall through */ 2011 2012 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2013 // skip write le host if not supported (e.g. on LE only EM9301) 2014 if (hci_le_supported() 2015 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2016 // LE Supported Host = 1, Simultaneous Host = 0 2017 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2018 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2019 break; 2020 } 2021 2022 /* fall through */ 2023 2024 case HCI_INIT_LE_SET_EVENT_MASK: 2025 if (hci_le_supported()){ 2026 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2027 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2028 break; 2029 } 2030 #endif 2031 2032 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2033 /* fall through */ 2034 2035 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2036 if (hci_le_supported() 2037 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2038 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2039 hci_send_cmd(&hci_le_read_maximum_data_length); 2040 break; 2041 } 2042 2043 /* fall through */ 2044 2045 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2046 if (hci_le_supported() 2047 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2048 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2049 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2050 break; 2051 } 2052 #endif 2053 2054 #ifdef ENABLE_LE_CENTRAL 2055 /* fall through */ 2056 2057 case HCI_INIT_READ_WHITE_LIST_SIZE: 2058 if (hci_le_supported()){ 2059 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2060 hci_send_cmd(&hci_le_read_white_list_size); 2061 break; 2062 } 2063 2064 #endif 2065 2066 #ifdef ENABLE_LE_PERIPHERAL 2067 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2068 /* fall through */ 2069 2070 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2071 if (hci_extended_advertising_supported()){ 2072 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2073 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2074 break; 2075 } 2076 #endif 2077 #endif 2078 /* fall through */ 2079 2080 case HCI_INIT_DONE: 2081 hci_stack->substate = HCI_INIT_DONE; 2082 // main init sequence complete 2083 #ifdef ENABLE_CLASSIC 2084 // check if initial Classic GAP Tasks are completed 2085 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2086 hci_run_gap_tasks_classic(); 2087 break; 2088 } 2089 #endif 2090 #ifdef ENABLE_BLE 2091 #ifdef ENABLE_LE_CENTRAL 2092 // check if initial LE GAP Tasks are completed 2093 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2094 hci_run_general_gap_le(); 2095 break; 2096 } 2097 #endif 2098 #endif 2099 hci_init_done(); 2100 break; 2101 2102 default: 2103 return; 2104 } 2105 } 2106 2107 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2108 bool command_completed = false; 2109 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2110 uint16_t opcode = little_endian_read_16(packet,3); 2111 if (opcode == hci_stack->last_cmd_opcode){ 2112 command_completed = true; 2113 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2114 } else { 2115 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2116 } 2117 } 2118 2119 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2120 uint8_t status = packet[2]; 2121 uint16_t opcode = little_endian_read_16(packet,4); 2122 if (opcode == hci_stack->last_cmd_opcode){ 2123 if (status){ 2124 command_completed = true; 2125 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2126 } else { 2127 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2128 } 2129 } else { 2130 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2131 } 2132 } 2133 #ifndef HAVE_HOST_CONTROLLER_API 2134 // Vendor == CSR 2135 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2136 // TODO: track actual command 2137 command_completed = true; 2138 } 2139 2140 // Vendor == Toshiba 2141 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2142 // TODO: track actual command 2143 command_completed = true; 2144 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2145 hci_stack->num_cmd_packets = 1; 2146 } 2147 #endif 2148 2149 return command_completed; 2150 } 2151 2152 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2153 2154 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2155 2156 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2157 2158 #ifndef HAVE_HOST_CONTROLLER_API 2159 2160 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2161 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2162 // 2163 // HCI Reset 2164 // Timeout 100 ms 2165 // HCI Reset 2166 // Command Complete Reset 2167 // HCI Read Local Version Information 2168 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2169 // hang... 2170 // 2171 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2172 if (!command_completed 2173 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2174 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2175 2176 uint16_t opcode = little_endian_read_16(packet,3); 2177 if (opcode == hci_reset.opcode){ 2178 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2179 return; 2180 } 2181 } 2182 2183 // CSR & H5 2184 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2185 if (!command_completed 2186 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2187 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2188 2189 uint16_t opcode = little_endian_read_16(packet,3); 2190 if (opcode == hci_reset.opcode){ 2191 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2192 return; 2193 } 2194 } 2195 2196 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2197 // fix: Correct substate and behave as command below 2198 if (command_completed){ 2199 switch (hci_stack->substate){ 2200 case HCI_INIT_SEND_RESET: 2201 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2202 break; 2203 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2204 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2205 break; 2206 default: 2207 break; 2208 } 2209 } 2210 2211 #endif 2212 2213 if (!command_completed) return; 2214 2215 bool need_baud_change = false; 2216 bool need_addr_change = false; 2217 2218 #ifndef HAVE_HOST_CONTROLLER_API 2219 need_baud_change = hci_stack->config 2220 && hci_stack->chipset 2221 && hci_stack->chipset->set_baudrate_command 2222 && hci_stack->hci_transport->set_baudrate 2223 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2224 2225 need_addr_change = hci_stack->custom_bd_addr_set 2226 && hci_stack->chipset 2227 && hci_stack->chipset->set_bd_addr_command; 2228 #endif 2229 2230 switch(hci_stack->substate){ 2231 2232 #ifndef HAVE_HOST_CONTROLLER_API 2233 case HCI_INIT_SEND_RESET: 2234 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2235 // fix: just correct substate and behave as command below 2236 2237 /* fall through */ 2238 #endif 2239 2240 case HCI_INIT_W4_SEND_RESET: 2241 btstack_run_loop_remove_timer(&hci_stack->timeout); 2242 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2243 return; 2244 2245 #ifndef HAVE_HOST_CONTROLLER_API 2246 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2247 // for STLC2500D, baud rate change already happened. 2248 // for others, baud rate gets changed now 2249 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2251 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2252 hci_stack->hci_transport->set_baudrate(baud_rate); 2253 } 2254 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2255 return; 2256 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2257 btstack_run_loop_remove_timer(&hci_stack->timeout); 2258 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2259 return; 2260 case HCI_INIT_W4_CUSTOM_INIT: 2261 // repeat custom init 2262 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2263 return; 2264 #endif 2265 2266 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2267 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2268 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2269 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2270 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2271 return; 2272 } 2273 if (need_addr_change){ 2274 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2275 return; 2276 } 2277 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2278 return; 2279 #ifndef HAVE_HOST_CONTROLLER_API 2280 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2281 if (need_baud_change){ 2282 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2283 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2284 hci_stack->hci_transport->set_baudrate(baud_rate); 2285 } 2286 if (need_addr_change){ 2287 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2288 return; 2289 } 2290 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2291 return; 2292 case HCI_INIT_W4_SET_BD_ADDR: 2293 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2294 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2295 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2296 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2297 return; 2298 } 2299 // skipping st warm boot 2300 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2301 return; 2302 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2303 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2304 return; 2305 #endif 2306 2307 case HCI_INIT_DONE: 2308 // set state if we came here by fall through 2309 hci_stack->substate = HCI_INIT_DONE; 2310 return; 2311 2312 default: 2313 break; 2314 } 2315 hci_initializing_next_state(); 2316 } 2317 2318 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2319 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2320 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2321 // check if we have been aware of the HCI connection 2322 switch (conn->state){ 2323 case SENT_CREATE_CONNECTION: 2324 case RECEIVED_CONNECTION_REQUEST: 2325 break; 2326 default: 2327 return; 2328 } 2329 2330 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2331 bd_addr_t bd_address; 2332 (void)memcpy(&bd_address, conn->address, 6); 2333 2334 #ifdef ENABLE_CLASSIC 2335 // cache needed data 2336 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2337 #endif 2338 2339 // connection failed, remove entry 2340 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2341 btstack_memory_hci_connection_free( conn ); 2342 2343 #ifdef ENABLE_CLASSIC 2344 // notify client if dedicated bonding 2345 if (notify_dedicated_bonding_failed){ 2346 log_info("hci notify_dedicated_bonding_failed"); 2347 hci_emit_dedicated_bonding_result(bd_address, status); 2348 } 2349 2350 // if authentication error, also delete link key 2351 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2352 gap_drop_link_key_for_bd_addr(bd_address); 2353 } 2354 #else 2355 UNUSED(status); 2356 #endif 2357 } 2358 2359 #ifdef ENABLE_CLASSIC 2360 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2361 // SSP Controller 2362 if (features[6] & (1 << 3)){ 2363 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2364 } 2365 // eSCO 2366 if (features[3] & (1<<7)){ 2367 conn->remote_supported_features[0] |= 1; 2368 } 2369 // Extended features 2370 if (features[7] & (1<<7)){ 2371 conn->remote_supported_features[0] |= 2; 2372 } 2373 } 2374 2375 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2376 // SSP Host 2377 if (features[0] & (1 << 0)){ 2378 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2379 } 2380 // SC Host 2381 if (features[0] & (1 << 3)){ 2382 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2383 } 2384 } 2385 2386 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2387 // SC Controller 2388 if (features[1] & (1 << 0)){ 2389 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2390 } 2391 } 2392 2393 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2394 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2395 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2396 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2397 if (conn->bonding_flags & BONDING_DEDICATED){ 2398 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2399 } 2400 } 2401 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2402 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2403 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2404 } 2405 2406 #endif 2407 2408 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2409 // handle BT initialization 2410 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2411 hci_initializing_event_handler(packet, size); 2412 } 2413 2414 // help with BT sleep 2415 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2416 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2417 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2418 hci_initializing_next_state(); 2419 } 2420 } 2421 2422 #ifdef ENABLE_CLASSIC 2423 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2424 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2425 conn->encryption_key_size = encryption_key_size; 2426 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2427 2428 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2429 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2430 conn->bonding_flags &= ~BONDING_DEDICATED; 2431 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2432 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2433 return; 2434 } 2435 2436 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2437 conn->requested_security_level = LEVEL_0; 2438 hci_emit_security_level(conn->con_handle, security_level); 2439 return; 2440 } 2441 2442 // Request remote features if not already done 2443 hci_trigger_remote_features_for_connection(conn); 2444 2445 // Request Authentication if not already done 2446 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2447 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2448 } 2449 #endif 2450 2451 static void hci_store_local_supported_commands(const uint8_t * packet){ 2452 // create mapping table 2453 #define X(name, offset, bit) { offset, bit }, 2454 static struct { 2455 uint8_t byte_offset; 2456 uint8_t bit_position; 2457 } supported_hci_commands_map [] = { 2458 SUPPORTED_HCI_COMMANDS 2459 }; 2460 #undef X 2461 2462 // create names for debug purposes 2463 #ifdef ENABLE_LOG_DEBUG 2464 #define X(name, offset, bit) #name, 2465 static const char * command_names[] = { 2466 SUPPORTED_HCI_COMMANDS 2467 }; 2468 #undef X 2469 #endif 2470 2471 hci_stack->local_supported_commands = 0; 2472 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2473 uint16_t i; 2474 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2475 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2476 #ifdef ENABLE_LOG_DEBUG 2477 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); 2478 #else 2479 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2480 #endif 2481 hci_stack->local_supported_commands |= (1LU << i); 2482 } 2483 } 2484 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2485 } 2486 2487 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2488 UNUSED(size); 2489 2490 uint16_t manufacturer; 2491 #ifdef ENABLE_CLASSIC 2492 hci_con_handle_t handle; 2493 hci_connection_t * conn; 2494 uint8_t status; 2495 #endif 2496 // get num cmd packets - limit to 1 to reduce complexity 2497 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2498 2499 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2500 switch (opcode){ 2501 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2502 if (packet[5]) break; 2503 // terminate, name 248 chars 2504 packet[6+248] = 0; 2505 log_info("local name: %s", &packet[6]); 2506 break; 2507 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2508 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2509 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2510 uint16_t acl_len = little_endian_read_16(packet, 6); 2511 uint16_t sco_len = packet[8]; 2512 2513 // determine usable ACL/SCO payload size 2514 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2515 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2516 2517 hci_stack->acl_packets_total_num = (uint8_t) little_endian_read_16(packet, 9); 2518 hci_stack->sco_packets_total_num = (uint8_t) little_endian_read_16(packet, 11); 2519 2520 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2521 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2522 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2523 } 2524 break; 2525 case HCI_OPCODE_HCI_READ_RSSI: 2526 if (packet[5] == ERROR_CODE_SUCCESS){ 2527 uint8_t event[5]; 2528 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2529 event[1] = 3; 2530 (void)memcpy(&event[2], &packet[6], 3); 2531 hci_emit_event(event, sizeof(event), 1); 2532 } 2533 break; 2534 #ifdef ENABLE_BLE 2535 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2536 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2537 hci_stack->le_iso_packets_total_num = packet[11]; 2538 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2539 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2540 2541 /* fall through */ 2542 2543 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2544 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2545 hci_stack->le_acl_packets_total_num = packet[8]; 2546 // determine usable ACL payload size 2547 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2548 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2549 } 2550 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); 2551 break; 2552 #endif 2553 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2554 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2555 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2556 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2557 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); 2558 break; 2559 #endif 2560 #ifdef ENABLE_LE_CENTRAL 2561 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2562 hci_stack->le_whitelist_capacity = packet[6]; 2563 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2564 break; 2565 #endif 2566 #ifdef ENABLE_LE_PERIPHERAL 2567 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2568 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2569 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2570 break; 2571 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2572 if (hci_stack->le_advertising_set_in_current_command != 0) { 2573 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2574 hci_stack->le_advertising_set_in_current_command = 0; 2575 if (advertising_set == NULL) break; 2576 uint8_t adv_status = packet[6]; 2577 uint8_t tx_power = packet[7]; 2578 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 }; 2579 if (adv_status == 0){ 2580 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2581 } 2582 hci_emit_event(event, sizeof(event), 1); 2583 } 2584 break; 2585 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2586 if (hci_stack->le_advertising_set_in_current_command != 0) { 2587 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2588 hci_stack->le_advertising_set_in_current_command = 0; 2589 if (advertising_set == NULL) break; 2590 uint8_t adv_status = packet[5]; 2591 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2592 if (adv_status == 0){ 2593 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2594 } 2595 hci_emit_event(event, sizeof(event), 1); 2596 } 2597 break; 2598 #endif 2599 #endif 2600 case HCI_OPCODE_HCI_READ_BD_ADDR: 2601 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2602 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)); 2603 #ifdef ENABLE_CLASSIC 2604 if (hci_stack->link_key_db){ 2605 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2606 } 2607 #endif 2608 break; 2609 #ifdef ENABLE_CLASSIC 2610 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2611 hci_emit_discoverable_enabled(hci_stack->discoverable); 2612 break; 2613 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2614 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2615 if (status == ERROR_CODE_SUCCESS) { 2616 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2617 } else { 2618 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2619 } 2620 break; 2621 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2622 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2623 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2624 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2625 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2626 hci_emit_event(event, sizeof(event), 1); 2627 } 2628 break; 2629 #endif 2630 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2631 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2632 2633 #ifdef ENABLE_CLASSIC 2634 // determine usable ACL packet types based on host buffer size and supported features 2635 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2636 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2637 #endif 2638 // Classic/LE 2639 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2640 break; 2641 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2642 manufacturer = little_endian_read_16(packet, 10); 2643 // map Cypress to Broadcom 2644 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2645 log_info("Treat Cypress as Broadcom"); 2646 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2647 little_endian_store_16(packet, 10, manufacturer); 2648 } 2649 hci_stack->manufacturer = manufacturer; 2650 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2651 break; 2652 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2653 hci_store_local_supported_commands(packet); 2654 break; 2655 #ifdef ENABLE_CLASSIC 2656 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2657 if (packet[5]) return; 2658 hci_stack->synchronous_flow_control_enabled = 1; 2659 break; 2660 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2661 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2662 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2663 conn = hci_connection_for_handle(handle); 2664 if (conn != NULL) { 2665 uint8_t key_size = 0; 2666 if (status == 0){ 2667 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2668 log_info("Handle %04x key Size: %u", handle, key_size); 2669 } else { 2670 key_size = 1; 2671 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2672 } 2673 hci_handle_read_encryption_key_size_complete(conn, key_size); 2674 } 2675 break; 2676 // assert pairing complete event is emitted. 2677 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2678 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2679 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2680 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2681 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2682 // lookup connection by gap pairing addr 2683 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2684 if (conn == NULL) break; 2685 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2686 break; 2687 2688 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2689 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2690 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2691 uint8_t event[67]; 2692 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2693 event[1] = 65; 2694 (void)memset(&event[2], 0, 65); 2695 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2696 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2697 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2698 event[2] = 3; 2699 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2700 } else { 2701 event[2] = 1; 2702 } 2703 } 2704 hci_emit_event(event, sizeof(event), 0); 2705 break; 2706 } 2707 2708 // note: only needed if user does not provide OOB data 2709 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2710 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2711 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2712 if (conn == NULL) break; 2713 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2714 break; 2715 #endif 2716 #endif 2717 default: 2718 break; 2719 } 2720 } 2721 2722 #ifdef ENABLE_BLE 2723 static void event_handle_le_connection_complete(const uint8_t * packet){ 2724 bd_addr_t addr; 2725 bd_addr_type_t addr_type; 2726 hci_connection_t * conn; 2727 2728 // Connection management 2729 reverse_bd_addr(&packet[8], addr); 2730 addr_type = (bd_addr_type_t)packet[7]; 2731 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2732 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2733 2734 #ifdef ENABLE_LE_CENTRAL 2735 // handle error: error is reported only to the initiator -> outgoing connection 2736 if (packet[3]){ 2737 2738 // handle cancelled outgoing connection 2739 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2740 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2741 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2742 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2743 // reset state 2744 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2745 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2746 // get outgoing connection conn struct for direct connect 2747 conn = gap_get_outgoing_connection(); 2748 } 2749 2750 // outgoing le connection establishment is done 2751 if (conn){ 2752 // remove entry 2753 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2754 btstack_memory_hci_connection_free( conn ); 2755 } 2756 return; 2757 } 2758 #endif 2759 2760 // on success, both hosts receive connection complete event 2761 if (packet[6] == HCI_ROLE_MASTER){ 2762 #ifdef ENABLE_LE_CENTRAL 2763 // if we're master on an le connection, it was an outgoing connection and we're done with it 2764 // note: no hci_connection_t object exists yet for connect with whitelist 2765 if (hci_is_le_connection_type(addr_type)){ 2766 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2767 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2768 } 2769 #endif 2770 } else { 2771 #ifdef ENABLE_LE_PERIPHERAL 2772 // if we're slave, it was an incoming connection, advertisements have stopped 2773 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2774 #endif 2775 } 2776 2777 // LE connections are auto-accepted, so just create a connection if there isn't one already 2778 if (!conn){ 2779 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2780 } 2781 2782 // no memory, sorry. 2783 if (!conn){ 2784 return; 2785 } 2786 2787 conn->state = OPEN; 2788 conn->role = packet[6]; 2789 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2790 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2791 2792 #ifdef ENABLE_LE_PERIPHERAL 2793 if (packet[6] == HCI_ROLE_SLAVE){ 2794 hci_update_advertisements_enabled_for_current_roles(); 2795 } 2796 #endif 2797 2798 // init unenhanced att bearer mtu 2799 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2800 conn->att_connection.mtu_exchanged = false; 2801 2802 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2803 2804 // restart timer 2805 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2806 // btstack_run_loop_add_timer(&conn->timeout); 2807 2808 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2809 2810 hci_emit_nr_connections_changed(); 2811 } 2812 #endif 2813 2814 #ifdef ENABLE_CLASSIC 2815 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){ 2816 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2817 // LEVEL_4 is tested by l2cap 2818 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2819 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2820 if (level >= LEVEL_3){ 2821 // MITM not possible without keyboard or display 2822 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2823 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2824 2825 // MITM possible if one side has keyboard and the other has keyboard or display 2826 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2827 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2828 2829 // MITM not possible if one side has only display and other side has no keyboard 2830 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2831 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2832 } 2833 // LEVEL 2 requires SSP, which is a given 2834 return true; 2835 } 2836 2837 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2838 uint16_t i; 2839 for (i=0; i < size ; i++){ 2840 if (data[i] != 0) { 2841 return false; 2842 } 2843 } 2844 return true; 2845 } 2846 2847 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2848 // get requested security level 2849 gap_security_level_t requested_security_level = conn->requested_security_level; 2850 if (hci_stack->gap_secure_connections_only_mode){ 2851 requested_security_level = LEVEL_4; 2852 } 2853 2854 // assess security: LEVEL 4 requires SC 2855 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2856 if ((requested_security_level == LEVEL_4) && 2857 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2858 !hci_remote_sc_enabled(conn)){ 2859 log_info("Level 4 required, but SC not supported -> abort"); 2860 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2861 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2862 return; 2863 } 2864 2865 // assess security based on io capabilities 2866 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2867 // responder: fully validate io caps of both sides as well as OOB data 2868 bool security_possible = false; 2869 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2870 2871 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2872 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2873 // so we merge the OOB data availability 2874 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2875 if (conn->classic_oob_c_192 != NULL){ 2876 have_oob_data |= 1; 2877 } 2878 if (conn->classic_oob_c_256 != NULL){ 2879 have_oob_data |= 2; 2880 } 2881 // for up to Level 3, either P-192 as well as P-256 will do 2882 // 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 2883 // if remote does not SC, we should not receive P-256 data either 2884 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2885 security_possible = true; 2886 } 2887 // for Level 4, P-256 is needed 2888 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2889 security_possible = true; 2890 } 2891 #endif 2892 2893 if (security_possible == false){ 2894 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2895 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2896 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2897 return; 2898 } 2899 } else { 2900 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2901 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2902 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2903 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2904 log_info("Level 3+ required, but no input/output -> abort"); 2905 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2906 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2907 return; 2908 } 2909 #endif 2910 #endif 2911 } 2912 2913 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2914 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2915 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2916 } else { 2917 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2918 } 2919 #endif 2920 } 2921 2922 #endif 2923 2924 static void event_handler(uint8_t *packet, uint16_t size){ 2925 2926 uint16_t event_length = packet[1]; 2927 2928 // assert packet is complete 2929 if (size != (event_length + 2u)){ 2930 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2931 return; 2932 } 2933 2934 bd_addr_type_t addr_type; 2935 hci_con_handle_t handle; 2936 hci_connection_t * conn; 2937 int i; 2938 int create_connection_cmd; 2939 2940 #ifdef ENABLE_CLASSIC 2941 hci_link_type_t link_type; 2942 bd_addr_t addr; 2943 #endif 2944 2945 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2946 2947 switch (hci_event_packet_get_type(packet)) { 2948 2949 case HCI_EVENT_COMMAND_COMPLETE: 2950 handle_command_complete_event(packet, size); 2951 break; 2952 2953 case HCI_EVENT_COMMAND_STATUS: 2954 // get num cmd packets - limit to 1 to reduce complexity 2955 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2956 2957 // check command status to detected failed outgoing connections 2958 create_connection_cmd = 0; 2959 #ifdef ENABLE_CLASSIC 2960 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2961 create_connection_cmd = 1; 2962 } 2963 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2964 create_connection_cmd = 1; 2965 } 2966 #endif 2967 #ifdef ENABLE_LE_CENTRAL 2968 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2969 create_connection_cmd = 1; 2970 } 2971 #endif 2972 if (create_connection_cmd) { 2973 uint8_t status = hci_event_command_status_get_status(packet); 2974 addr_type = hci_stack->outgoing_addr_type; 2975 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2976 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); 2977 2978 // reset outgoing address info 2979 memset(hci_stack->outgoing_addr, 0, 6); 2980 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2981 2982 // on error 2983 if (status != ERROR_CODE_SUCCESS){ 2984 #ifdef ENABLE_LE_CENTRAL 2985 if (hci_is_le_connection_type(addr_type)){ 2986 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2987 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2988 } 2989 #endif 2990 // error => outgoing connection failed 2991 if (conn != NULL){ 2992 hci_handle_connection_failed(conn, status); 2993 } 2994 } 2995 } 2996 2997 #ifdef ENABLE_CLASSIC 2998 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)){ 2999 uint8_t status = hci_event_command_status_get_status(packet); 3000 log_info("command status (inquiry), status %x", status); 3001 if (status == ERROR_CODE_SUCCESS) { 3002 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3003 } else { 3004 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3005 } 3006 } 3007 #endif 3008 break; 3009 3010 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3011 if (size < 3) return; 3012 uint16_t num_handles = packet[2]; 3013 if (size != (3u + num_handles * 4u)) return; 3014 uint16_t offset = 3; 3015 for (i=0; i<num_handles;i++){ 3016 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3017 offset += 2u; 3018 uint16_t num_packets = little_endian_read_16(packet, offset); 3019 offset += 2u; 3020 3021 conn = hci_connection_for_handle(handle); 3022 if (!conn){ 3023 log_error("hci_number_completed_packet lists unused con handle %u", handle); 3024 continue; 3025 } 3026 3027 if (conn->num_packets_sent >= num_packets){ 3028 conn->num_packets_sent -= num_packets; 3029 } else { 3030 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3031 conn->num_packets_sent = 0; 3032 } 3033 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3034 3035 #ifdef ENABLE_CLASSIC 3036 // For SCO, we do the can_send_now_check here 3037 hci_notify_if_sco_can_send_now(); 3038 #endif 3039 } 3040 break; 3041 } 3042 3043 #ifdef ENABLE_CLASSIC 3044 case HCI_EVENT_FLUSH_OCCURRED: 3045 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3046 handle = hci_event_flush_occurred_get_handle(packet); 3047 conn = hci_connection_for_handle(handle); 3048 if (conn) { 3049 log_info("Flush occurred, disconnect 0x%04x", handle); 3050 conn->state = SEND_DISCONNECT; 3051 } 3052 break; 3053 3054 case HCI_EVENT_INQUIRY_COMPLETE: 3055 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3056 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3057 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3058 hci_emit_event(event, sizeof(event), 1); 3059 } 3060 break; 3061 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3062 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3063 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3064 } 3065 break; 3066 case HCI_EVENT_CONNECTION_REQUEST: 3067 reverse_bd_addr(&packet[2], addr); 3068 link_type = (hci_link_type_t) packet[11]; 3069 3070 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3071 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3072 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3073 bd_addr_copy(hci_stack->decline_addr, addr); 3074 break; 3075 } 3076 3077 if (hci_stack->gap_classic_accept_callback != NULL){ 3078 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3079 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3080 bd_addr_copy(hci_stack->decline_addr, addr); 3081 break; 3082 } 3083 } 3084 3085 // TODO: eval COD 8-10 3086 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3087 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3088 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3089 if (!conn) { 3090 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3091 } 3092 if (!conn) { 3093 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3094 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3095 bd_addr_copy(hci_stack->decline_addr, addr); 3096 hci_run(); 3097 // avoid event to higher layer 3098 return; 3099 } 3100 conn->role = HCI_ROLE_SLAVE; 3101 conn->state = RECEIVED_CONNECTION_REQUEST; 3102 // store info about eSCO 3103 if (link_type == HCI_LINK_TYPE_ESCO){ 3104 conn->remote_supported_features[0] |= 1; 3105 } 3106 hci_run(); 3107 break; 3108 3109 case HCI_EVENT_CONNECTION_COMPLETE: 3110 // Connection management 3111 reverse_bd_addr(&packet[5], addr); 3112 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3113 addr_type = BD_ADDR_TYPE_ACL; 3114 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3115 if (conn) { 3116 if (!packet[2]){ 3117 conn->state = OPEN; 3118 conn->con_handle = little_endian_read_16(packet, 3); 3119 3120 // trigger write supervision timeout if we're master 3121 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3122 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3123 } 3124 3125 // trigger write automatic flush timeout 3126 if (hci_stack->automatic_flush_timeout != 0){ 3127 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3128 } 3129 3130 // restart timer 3131 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3132 btstack_run_loop_add_timer(&conn->timeout); 3133 3134 // trigger remote features for dedicated bonding 3135 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3136 hci_trigger_remote_features_for_connection(conn); 3137 } 3138 3139 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3140 3141 hci_emit_nr_connections_changed(); 3142 } else { 3143 // connection failed 3144 hci_handle_connection_failed(conn, packet[2]); 3145 } 3146 } 3147 break; 3148 3149 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3150 reverse_bd_addr(&packet[5], addr); 3151 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3152 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3153 if (packet[2]){ 3154 // connection failed 3155 if (conn){ 3156 hci_handle_connection_failed(conn, packet[2]); 3157 } 3158 break; 3159 } 3160 if (!conn) { 3161 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3162 } 3163 if (!conn) { 3164 break; 3165 } 3166 conn->state = OPEN; 3167 conn->con_handle = little_endian_read_16(packet, 3); 3168 3169 #ifdef ENABLE_SCO_OVER_HCI 3170 // update SCO 3171 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3172 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3173 } 3174 // trigger can send now 3175 if (hci_have_usb_transport()){ 3176 hci_stack->sco_can_send_now = true; 3177 } 3178 #endif 3179 #ifdef HAVE_SCO_TRANSPORT 3180 // configure sco transport 3181 if (hci_stack->sco_transport != NULL){ 3182 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3183 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3184 } 3185 #endif 3186 break; 3187 3188 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3189 handle = little_endian_read_16(packet, 3); 3190 conn = hci_connection_for_handle(handle); 3191 if (!conn) break; 3192 if (!packet[2]){ 3193 const uint8_t * features = &packet[5]; 3194 hci_handle_remote_features_page_0(conn, features); 3195 3196 // read extended features if possible 3197 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3198 && ((conn->remote_supported_features[0] & 2) != 0)) { 3199 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3200 break; 3201 } 3202 } 3203 hci_handle_remote_features_received(conn); 3204 break; 3205 3206 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3207 handle = little_endian_read_16(packet, 3); 3208 conn = hci_connection_for_handle(handle); 3209 if (!conn) break; 3210 // status = ok, page = 1 3211 if (!packet[2]) { 3212 uint8_t page_number = packet[5]; 3213 uint8_t maximum_page_number = packet[6]; 3214 const uint8_t * features = &packet[7]; 3215 bool done = false; 3216 switch (page_number){ 3217 case 1: 3218 hci_handle_remote_features_page_1(conn, features); 3219 if (maximum_page_number >= 2){ 3220 // get Secure Connections (Controller) from Page 2 if available 3221 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3222 } else { 3223 // otherwise, assume SC (Controller) == SC (Host) 3224 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3225 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3226 } 3227 done = true; 3228 } 3229 break; 3230 case 2: 3231 hci_handle_remote_features_page_2(conn, features); 3232 done = true; 3233 break; 3234 default: 3235 break; 3236 } 3237 if (!done) break; 3238 } 3239 hci_handle_remote_features_received(conn); 3240 break; 3241 3242 case HCI_EVENT_LINK_KEY_REQUEST: 3243 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3244 hci_event_link_key_request_get_bd_addr(packet, addr); 3245 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3246 if (!conn) break; 3247 3248 // lookup link key in db if not cached 3249 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3250 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3251 } 3252 3253 // response sent by hci_run() 3254 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3255 #endif 3256 break; 3257 3258 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3259 hci_event_link_key_request_get_bd_addr(packet, addr); 3260 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3261 if (!conn) break; 3262 3263 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3264 3265 // CVE-2020-26555: ignore NULL link key 3266 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3267 if (btstack_is_null(&packet[8], 16)) break; 3268 3269 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3270 // Change Connection Encryption keeps link key type 3271 if (link_key_type != CHANGED_COMBINATION_KEY){ 3272 conn->link_key_type = link_key_type; 3273 } 3274 3275 // cache link key. link keys stored in little-endian format for legacy reasons 3276 memcpy(&conn->link_key, &packet[8], 16); 3277 3278 // only store link key: 3279 // - if bondable enabled 3280 if (hci_stack->bondable == false) break; 3281 // - if security level sufficient 3282 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3283 // - for SSP, also check if remote side requested bonding as well 3284 if (conn->link_key_type != COMBINATION_KEY){ 3285 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3286 if (!remote_bonding){ 3287 break; 3288 } 3289 } 3290 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3291 break; 3292 } 3293 3294 case HCI_EVENT_PIN_CODE_REQUEST: 3295 hci_event_pin_code_request_get_bd_addr(packet, addr); 3296 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3297 if (!conn) break; 3298 3299 hci_pairing_started(conn, false); 3300 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3301 if (!hci_stack->bondable ){ 3302 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3303 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3304 hci_run(); 3305 return; 3306 } 3307 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3308 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3309 log_info("Level 4 required, but SC not supported -> abort"); 3310 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3311 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3312 hci_run(); 3313 return; 3314 } 3315 break; 3316 3317 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3318 hci_event_io_capability_response_get_bd_addr(packet, addr); 3319 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3320 if (!conn) break; 3321 3322 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3323 hci_pairing_started(conn, true); 3324 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3325 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3326 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3327 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3328 #endif 3329 break; 3330 3331 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3332 hci_event_io_capability_response_get_bd_addr(packet, addr); 3333 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3334 if (!conn) break; 3335 3336 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3337 hci_connection_timestamp(conn); 3338 hci_pairing_started(conn, true); 3339 break; 3340 3341 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3342 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3343 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3344 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3345 if (!conn) break; 3346 3347 hci_connection_timestamp(conn); 3348 3349 hci_pairing_started(conn, true); 3350 3351 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3352 break; 3353 #endif 3354 3355 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3356 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3357 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3358 if (!conn) break; 3359 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3360 if (hci_stack->ssp_auto_accept){ 3361 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3362 }; 3363 } else { 3364 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3365 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3366 // don't forward event to app 3367 hci_run(); 3368 return; 3369 } 3370 break; 3371 3372 case HCI_EVENT_USER_PASSKEY_REQUEST: 3373 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3374 if (hci_stack->ssp_auto_accept){ 3375 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3376 }; 3377 break; 3378 3379 case HCI_EVENT_MODE_CHANGE: 3380 handle = hci_event_mode_change_get_handle(packet); 3381 conn = hci_connection_for_handle(handle); 3382 if (!conn) break; 3383 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3384 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3385 break; 3386 #endif 3387 3388 case HCI_EVENT_ENCRYPTION_CHANGE: 3389 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3390 handle = hci_event_encryption_change_get_connection_handle(packet); 3391 conn = hci_connection_for_handle(handle); 3392 if (!conn) break; 3393 if (hci_event_encryption_change_get_status(packet) == 0u) { 3394 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3395 if (encryption_enabled){ 3396 if (hci_is_le_connection(conn)){ 3397 // For LE, we accept connection as encrypted 3398 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3399 } 3400 #ifdef ENABLE_CLASSIC 3401 else { 3402 3403 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3404 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3405 bool connected_uses_aes_ccm = encryption_enabled == 2; 3406 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3407 log_info("SC during pairing, but only E0 now -> abort"); 3408 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3409 break; 3410 } 3411 3412 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3413 if (connected_uses_aes_ccm){ 3414 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3415 } 3416 3417 #ifdef ENABLE_TESTING_SUPPORT 3418 // work around for issue with PTS dongle 3419 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3420 #endif 3421 // validate encryption key size 3422 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3423 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3424 // already got encryption key size 3425 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3426 } else { 3427 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3428 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3429 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3430 } else { 3431 // if not, pretend everything is perfect 3432 hci_handle_read_encryption_key_size_complete(conn, 16); 3433 } 3434 } 3435 } 3436 #endif 3437 } else { 3438 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3439 } 3440 } else { 3441 uint8_t status = hci_event_encryption_change_get_status(packet); 3442 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3443 conn->bonding_flags &= ~BONDING_DEDICATED; 3444 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3445 conn->bonding_status = status; 3446 } 3447 } 3448 3449 break; 3450 3451 #ifdef ENABLE_CLASSIC 3452 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3453 handle = hci_event_authentication_complete_get_connection_handle(packet); 3454 conn = hci_connection_for_handle(handle); 3455 if (!conn) break; 3456 3457 // clear authentication active flag 3458 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3459 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3460 3461 // authenticated only if auth status == 0 3462 if (hci_event_authentication_complete_get_status(packet) == 0){ 3463 // authenticated 3464 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3465 3466 // If not already encrypted, start encryption 3467 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3468 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3469 break; 3470 } 3471 } 3472 3473 // emit updated security level 3474 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3475 break; 3476 3477 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3478 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3479 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3480 if (!conn) break; 3481 3482 // treat successfully paired connection as authenticated 3483 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3484 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3485 } 3486 3487 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3488 break; 3489 #endif 3490 3491 // HCI_EVENT_DISCONNECTION_COMPLETE 3492 // has been split, to first notify stack before shutting connection down 3493 // see end of function, too. 3494 case HCI_EVENT_DISCONNECTION_COMPLETE: 3495 if (packet[2]) break; // status != 0 3496 handle = little_endian_read_16(packet, 3); 3497 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3498 if (hci_stack->acl_fragmentation_total_size > 0u) { 3499 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3500 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3501 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3502 hci_stack->acl_fragmentation_total_size = 0; 3503 hci_stack->acl_fragmentation_pos = 0; 3504 if (release_buffer){ 3505 hci_release_packet_buffer(); 3506 } 3507 } 3508 } 3509 3510 conn = hci_connection_for_handle(handle); 3511 if (!conn) break; 3512 #ifdef ENABLE_CLASSIC 3513 // pairing failed if it was ongoing 3514 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3515 #endif 3516 3517 // emit dedicatd bonding event 3518 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3519 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3520 } 3521 3522 // mark connection for shutdown, stop timers, reset state 3523 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3524 hci_connection_stop_timer(conn); 3525 hci_connection_init(conn); 3526 3527 #ifdef ENABLE_BLE 3528 #ifdef ENABLE_LE_PERIPHERAL 3529 // re-enable advertisements for le connections if active 3530 if (hci_is_le_connection(conn)){ 3531 hci_update_advertisements_enabled_for_current_roles(); 3532 } 3533 #endif 3534 #endif 3535 break; 3536 3537 case HCI_EVENT_HARDWARE_ERROR: 3538 log_error("Hardware Error: 0x%02x", packet[2]); 3539 if (hci_stack->hardware_error_callback){ 3540 (*hci_stack->hardware_error_callback)(packet[2]); 3541 } else { 3542 // if no special requests, just reboot stack 3543 hci_power_control_off(); 3544 hci_power_control_on(); 3545 } 3546 break; 3547 3548 #ifdef ENABLE_CLASSIC 3549 case HCI_EVENT_ROLE_CHANGE: 3550 if (packet[2]) break; // status != 0 3551 reverse_bd_addr(&packet[3], addr); 3552 addr_type = BD_ADDR_TYPE_ACL; 3553 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3554 if (!conn) break; 3555 conn->role = packet[9]; 3556 break; 3557 #endif 3558 3559 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3560 // release packet buffer only for asynchronous transport and if there are not further fragements 3561 if (hci_transport_synchronous()) { 3562 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3563 return; // instead of break: to avoid re-entering hci_run() 3564 } 3565 hci_stack->acl_fragmentation_tx_active = 0; 3566 if (hci_stack->acl_fragmentation_total_size) break; 3567 hci_release_packet_buffer(); 3568 3569 // L2CAP receives this event via the hci_emit_event below 3570 3571 #ifdef ENABLE_CLASSIC 3572 // For SCO, we do the can_send_now_check here 3573 hci_notify_if_sco_can_send_now(); 3574 #endif 3575 break; 3576 3577 #ifdef ENABLE_CLASSIC 3578 case HCI_EVENT_SCO_CAN_SEND_NOW: 3579 // For SCO, we do the can_send_now_check here 3580 hci_stack->sco_can_send_now = true; 3581 hci_notify_if_sco_can_send_now(); 3582 return; 3583 3584 // explode inquriy results for easier consumption 3585 case HCI_EVENT_INQUIRY_RESULT: 3586 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3587 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3588 gap_inquiry_explode(packet, size); 3589 break; 3590 #endif 3591 3592 #ifdef ENABLE_BLE 3593 case HCI_EVENT_LE_META: 3594 switch (packet[2]){ 3595 #ifdef ENABLE_LE_CENTRAL 3596 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3597 if (!hci_stack->le_scanning_enabled) break; 3598 le_handle_advertisement_report(packet, size); 3599 break; 3600 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3601 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3602 if (!hci_stack->le_scanning_enabled) break; 3603 le_handle_extended_advertisement_report(packet, size); 3604 break; 3605 #endif 3606 #endif 3607 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3608 event_handle_le_connection_complete(packet); 3609 break; 3610 3611 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3612 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3613 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3614 conn = hci_connection_for_handle(handle); 3615 if (!conn) break; 3616 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3617 break; 3618 3619 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3620 // connection 3621 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3622 conn = hci_connection_for_handle(handle); 3623 if (conn) { 3624 // read arguments 3625 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3626 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3627 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3628 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3629 3630 // validate against current connection parameter range 3631 le_connection_parameter_range_t existing_range; 3632 gap_get_connection_parameter_range(&existing_range); 3633 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3634 if (update_parameter){ 3635 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3636 conn->le_conn_interval_min = le_conn_interval_min; 3637 conn->le_conn_interval_max = le_conn_interval_max; 3638 conn->le_conn_latency = le_conn_latency; 3639 conn->le_supervision_timeout = le_supervision_timeout; 3640 } else { 3641 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3642 } 3643 } 3644 break; 3645 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3646 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3647 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3648 conn = hci_connection_for_handle(handle); 3649 if (conn) { 3650 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3651 } 3652 break; 3653 #endif 3654 default: 3655 break; 3656 } 3657 break; 3658 #endif 3659 case HCI_EVENT_VENDOR_SPECIFIC: 3660 // Vendor specific commands often create vendor specific event instead of num completed packets 3661 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3662 switch (hci_stack->manufacturer){ 3663 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3664 hci_stack->num_cmd_packets = 1; 3665 break; 3666 default: 3667 break; 3668 } 3669 break; 3670 default: 3671 break; 3672 } 3673 3674 handle_event_for_current_stack_state(packet, size); 3675 3676 // notify upper stack 3677 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3678 3679 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3680 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3681 handle = little_endian_read_16(packet, 3); 3682 hci_connection_t * aConn = hci_connection_for_handle(handle); 3683 // discard connection if app did not trigger a reconnect in the event handler 3684 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3685 hci_shutdown_connection(aConn); 3686 } 3687 } 3688 3689 // execute main loop 3690 hci_run(); 3691 } 3692 3693 #ifdef ENABLE_CLASSIC 3694 3695 #ifdef ENABLE_SCO_OVER_HCI 3696 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3697 static void sco_schedule_tx(hci_connection_t * conn); 3698 3699 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3700 log_debug("SCO TX Timeout"); 3701 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3702 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3703 if (!conn) return; 3704 3705 // trigger send 3706 conn->sco_tx_ready = 1; 3707 // extra packet if CVSD but SCO buffer is too short 3708 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3709 conn->sco_tx_ready++; 3710 } 3711 hci_notify_if_sco_can_send_now(); 3712 } 3713 3714 3715 #define SCO_TX_AFTER_RX_MS (6) 3716 3717 static void sco_schedule_tx(hci_connection_t * conn){ 3718 3719 uint32_t now = btstack_run_loop_get_time_ms(); 3720 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3721 int time_delta_ms = sco_tx_ms - now; 3722 3723 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3724 3725 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3726 btstack_run_loop_remove_timer(timer); 3727 btstack_run_loop_set_timer(timer, time_delta_ms); 3728 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3729 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3730 btstack_run_loop_add_timer(timer); 3731 } 3732 #endif 3733 3734 static void sco_handler(uint8_t * packet, uint16_t size){ 3735 // lookup connection struct 3736 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3737 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3738 if (!conn) return; 3739 3740 #ifdef ENABLE_SCO_OVER_HCI 3741 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3742 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3743 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3744 packet[2] = 0x3c; 3745 memmove(&packet[3], &packet[23], 63); 3746 size = 63; 3747 } 3748 } 3749 3750 if (hci_have_usb_transport()){ 3751 // Nothing to do 3752 } else { 3753 // 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); 3754 if (hci_stack->synchronous_flow_control_enabled == 0){ 3755 uint32_t now = btstack_run_loop_get_time_ms(); 3756 3757 if (!conn->sco_rx_valid){ 3758 // ignore first 10 packets 3759 conn->sco_rx_count++; 3760 // log_debug("sco rx count %u", conn->sco_rx_count); 3761 if (conn->sco_rx_count == 10) { 3762 // use first timestamp as is and pretent it just started 3763 conn->sco_rx_ms = now; 3764 conn->sco_rx_valid = 1; 3765 conn->sco_rx_count = 0; 3766 sco_schedule_tx(conn); 3767 } 3768 } else { 3769 // track expected arrival timme 3770 conn->sco_rx_count++; 3771 conn->sco_rx_ms += 7; 3772 int delta = (int32_t) (now - conn->sco_rx_ms); 3773 if (delta > 0){ 3774 conn->sco_rx_ms++; 3775 } 3776 // log_debug("sco rx %u", conn->sco_rx_ms); 3777 sco_schedule_tx(conn); 3778 } 3779 } 3780 } 3781 #endif 3782 3783 // deliver to app 3784 if (hci_stack->sco_packet_handler) { 3785 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3786 } 3787 3788 #ifdef HAVE_SCO_TRANSPORT 3789 // We can send one packet for each received packet 3790 conn->sco_tx_ready++; 3791 hci_notify_if_sco_can_send_now(); 3792 #endif 3793 3794 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3795 conn->num_packets_completed++; 3796 hci_stack->host_completed_packets = 1; 3797 hci_run(); 3798 #endif 3799 } 3800 #endif 3801 3802 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3803 hci_dump_packet(packet_type, 1, packet, size); 3804 switch (packet_type) { 3805 case HCI_EVENT_PACKET: 3806 event_handler(packet, size); 3807 break; 3808 case HCI_ACL_DATA_PACKET: 3809 acl_handler(packet, size); 3810 break; 3811 #ifdef ENABLE_CLASSIC 3812 case HCI_SCO_DATA_PACKET: 3813 sco_handler(packet, size); 3814 break; 3815 #endif 3816 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3817 case HCI_ISO_DATA_PACKET: 3818 if (hci_stack->iso_packet_handler != NULL){ 3819 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 3820 } 3821 break; 3822 #endif 3823 default: 3824 break; 3825 } 3826 } 3827 3828 /** 3829 * @brief Add event packet handler. 3830 */ 3831 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3832 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3833 } 3834 3835 /** 3836 * @brief Remove event packet handler. 3837 */ 3838 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3839 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3840 } 3841 3842 /** Register HCI packet handlers */ 3843 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3844 hci_stack->acl_packet_handler = handler; 3845 } 3846 3847 #ifdef ENABLE_CLASSIC 3848 /** 3849 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3850 */ 3851 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3852 hci_stack->sco_packet_handler = handler; 3853 } 3854 #endif 3855 3856 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3857 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 3858 hci_stack->iso_packet_handler = handler; 3859 } 3860 #endif 3861 3862 static void hci_state_reset(void){ 3863 // no connections yet 3864 hci_stack->connections = NULL; 3865 3866 // keep discoverable/connectable as this has been requested by the client(s) 3867 // hci_stack->discoverable = 0; 3868 // hci_stack->connectable = 0; 3869 // hci_stack->bondable = 1; 3870 // hci_stack->own_addr_type = 0; 3871 3872 // buffer is free 3873 hci_stack->hci_packet_buffer_reserved = false; 3874 3875 // no pending cmds 3876 hci_stack->decline_reason = 0; 3877 3878 hci_stack->secure_connections_active = false; 3879 3880 #ifdef ENABLE_CLASSIC 3881 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3882 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3883 3884 hci_stack->gap_tasks_classic = 3885 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3886 GAP_TASK_SET_CLASS_OF_DEVICE | 3887 GAP_TASK_SET_LOCAL_NAME | 3888 GAP_TASK_SET_EIR_DATA | 3889 GAP_TASK_WRITE_SCAN_ENABLE | 3890 GAP_TASK_WRITE_PAGE_TIMEOUT; 3891 #endif 3892 3893 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3894 hci_stack->classic_read_local_oob_data = false; 3895 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3896 #endif 3897 3898 // LE 3899 #ifdef ENABLE_BLE 3900 memset(hci_stack->le_random_address, 0, 6); 3901 hci_stack->le_random_address_set = 0; 3902 #endif 3903 #ifdef ENABLE_LE_CENTRAL 3904 hci_stack->le_scanning_active = false; 3905 hci_stack->le_scanning_param_update = true; 3906 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3907 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3908 hci_stack->le_whitelist_capacity = 0; 3909 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3910 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 3911 #endif 3912 #endif 3913 #ifdef ENABLE_LE_PERIPHERAL 3914 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3915 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3916 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3917 } 3918 if (hci_stack->le_advertisements_data != NULL){ 3919 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3920 } 3921 #endif 3922 } 3923 3924 #ifdef ENABLE_CLASSIC 3925 /** 3926 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3927 */ 3928 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3929 // store and open remote device db 3930 hci_stack->link_key_db = link_key_db; 3931 if (hci_stack->link_key_db) { 3932 hci_stack->link_key_db->open(); 3933 } 3934 } 3935 #endif 3936 3937 void hci_init(const hci_transport_t *transport, const void *config){ 3938 3939 #ifdef HAVE_MALLOC 3940 if (!hci_stack) { 3941 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3942 } 3943 #else 3944 hci_stack = &hci_stack_static; 3945 #endif 3946 memset(hci_stack, 0, sizeof(hci_stack_t)); 3947 3948 // reference to use transport layer implementation 3949 hci_stack->hci_transport = transport; 3950 3951 // reference to used config 3952 hci_stack->config = config; 3953 3954 // setup pointer for outgoing packet buffer 3955 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3956 3957 // max acl payload size defined in config.h 3958 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3959 3960 // register packet handlers with transport 3961 transport->register_packet_handler(&packet_handler); 3962 3963 hci_stack->state = HCI_STATE_OFF; 3964 3965 // class of device 3966 hci_stack->class_of_device = 0x007a020c; // Smartphone 3967 3968 // bondable by default 3969 hci_stack->bondable = 1; 3970 3971 #ifdef ENABLE_CLASSIC 3972 // classic name 3973 hci_stack->local_name = default_classic_name; 3974 3975 // Master slave policy 3976 hci_stack->master_slave_policy = 1; 3977 3978 // Allow Role Switch 3979 hci_stack->allow_role_switch = 1; 3980 3981 // Default / minimum security level = 2 3982 hci_stack->gap_security_level = LEVEL_2; 3983 3984 // Default Security Mode 4 3985 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3986 3987 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3988 hci_stack->gap_required_encyrption_key_size = 7; 3989 3990 // Link Supervision Timeout 3991 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3992 3993 #endif 3994 3995 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3996 hci_stack->ssp_enable = 1; 3997 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3998 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3999 hci_stack->ssp_auto_accept = 1; 4000 4001 // Secure Connections: enable (requires support from Controller) 4002 hci_stack->secure_connections_enable = true; 4003 4004 // voice setting - signed 16 bit pcm data with CVSD over the air 4005 hci_stack->sco_voice_setting = 0x60; 4006 4007 #ifdef ENABLE_LE_CENTRAL 4008 // connection parameter to use for outgoing connections 4009 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4010 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4011 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4012 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4013 hci_stack->le_connection_latency = 4; // 4 4014 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4015 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4016 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4017 4018 // default LE Scanning 4019 hci_stack->le_scan_type = 0x1; // active 4020 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4021 hci_stack->le_scan_window = 0x30; // 30 ms 4022 #endif 4023 4024 #ifdef ENABLE_LE_PERIPHERAL 4025 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4026 #endif 4027 4028 // connection parameter range used to answer connection parameter update requests in l2cap 4029 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4030 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4031 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4032 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4033 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4034 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4035 4036 hci_state_reset(); 4037 } 4038 4039 void hci_deinit(void){ 4040 btstack_run_loop_remove_timer(&hci_stack->timeout); 4041 #ifdef HAVE_MALLOC 4042 if (hci_stack) { 4043 free(hci_stack); 4044 } 4045 #endif 4046 hci_stack = NULL; 4047 4048 #ifdef ENABLE_CLASSIC 4049 disable_l2cap_timeouts = 0; 4050 #endif 4051 } 4052 4053 /** 4054 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4055 */ 4056 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4057 hci_stack->chipset = chipset_driver; 4058 4059 // reset chipset driver - init is also called on power_up 4060 if (hci_stack->chipset && hci_stack->chipset->init){ 4061 hci_stack->chipset->init(hci_stack->config); 4062 } 4063 } 4064 4065 /** 4066 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4067 */ 4068 void hci_set_control(const btstack_control_t *hardware_control){ 4069 // references to used control implementation 4070 hci_stack->control = hardware_control; 4071 // init with transport config 4072 hardware_control->init(hci_stack->config); 4073 } 4074 4075 static void hci_discard_connections(void){ 4076 btstack_linked_list_iterator_t lit; 4077 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 4078 while (btstack_linked_list_iterator_has_next(&lit)){ 4079 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4080 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 4081 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4082 hci_shutdown_connection(connection); 4083 } 4084 } 4085 4086 void hci_close(void){ 4087 4088 #ifdef ENABLE_CLASSIC 4089 // close remote device db 4090 if (hci_stack->link_key_db) { 4091 hci_stack->link_key_db->close(); 4092 } 4093 #endif 4094 4095 hci_discard_connections(); 4096 4097 hci_power_control(HCI_POWER_OFF); 4098 4099 #ifdef HAVE_MALLOC 4100 free(hci_stack); 4101 #endif 4102 hci_stack = NULL; 4103 } 4104 4105 #ifdef HAVE_SCO_TRANSPORT 4106 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4107 hci_stack->sco_transport = sco_transport; 4108 sco_transport->register_packet_handler(&packet_handler); 4109 } 4110 #endif 4111 4112 #ifdef ENABLE_CLASSIC 4113 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4114 // validate ranage and set 4115 if (encryption_key_size < 7) return; 4116 if (encryption_key_size > 16) return; 4117 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4118 } 4119 4120 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4121 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4122 hci_stack->gap_security_mode = security_mode; 4123 return ERROR_CODE_SUCCESS; 4124 } else { 4125 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4126 } 4127 } 4128 4129 gap_security_mode_t gap_get_security_mode(void){ 4130 return hci_stack->gap_security_mode; 4131 } 4132 4133 void gap_set_security_level(gap_security_level_t security_level){ 4134 hci_stack->gap_security_level = security_level; 4135 } 4136 4137 gap_security_level_t gap_get_security_level(void){ 4138 if (hci_stack->gap_secure_connections_only_mode){ 4139 return LEVEL_4; 4140 } 4141 return hci_stack->gap_security_level; 4142 } 4143 4144 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4145 hci_stack->gap_minimal_service_security_level = security_level; 4146 } 4147 4148 void gap_set_secure_connections_only_mode(bool enable){ 4149 hci_stack->gap_secure_connections_only_mode = enable; 4150 } 4151 4152 bool gap_get_secure_connections_only_mode(void){ 4153 return hci_stack->gap_secure_connections_only_mode; 4154 } 4155 #endif 4156 4157 #ifdef ENABLE_CLASSIC 4158 void gap_set_class_of_device(uint32_t class_of_device){ 4159 hci_stack->class_of_device = class_of_device; 4160 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4161 hci_run(); 4162 } 4163 4164 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4165 hci_stack->default_link_policy_settings = default_link_policy_settings; 4166 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4167 hci_run(); 4168 } 4169 4170 void gap_set_allow_role_switch(bool allow_role_switch){ 4171 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4172 } 4173 4174 uint8_t hci_get_allow_role_switch(void){ 4175 return hci_stack->allow_role_switch; 4176 } 4177 4178 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4179 hci_stack->link_supervision_timeout = link_supervision_timeout; 4180 } 4181 4182 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4183 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4184 } 4185 4186 uint16_t hci_automatic_flush_timeout(void){ 4187 return hci_stack->automatic_flush_timeout; 4188 } 4189 4190 void hci_disable_l2cap_timeout_check(void){ 4191 disable_l2cap_timeouts = 1; 4192 } 4193 #endif 4194 4195 #ifndef HAVE_HOST_CONTROLLER_API 4196 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4197 void hci_set_bd_addr(bd_addr_t addr){ 4198 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4199 hci_stack->custom_bd_addr_set = 1; 4200 } 4201 #endif 4202 4203 // State-Module-Driver overview 4204 // state module low-level 4205 // HCI_STATE_OFF off close 4206 // HCI_STATE_INITIALIZING, on open 4207 // HCI_STATE_WORKING, on open 4208 // HCI_STATE_HALTING, on open 4209 // HCI_STATE_SLEEPING, off/sleep close 4210 // HCI_STATE_FALLING_ASLEEP on open 4211 4212 static int hci_power_control_on(void){ 4213 4214 // power on 4215 int err = 0; 4216 if (hci_stack->control && hci_stack->control->on){ 4217 err = (*hci_stack->control->on)(); 4218 } 4219 if (err){ 4220 log_error( "POWER_ON failed"); 4221 hci_emit_hci_open_failed(); 4222 return err; 4223 } 4224 4225 // int chipset driver 4226 if (hci_stack->chipset && hci_stack->chipset->init){ 4227 hci_stack->chipset->init(hci_stack->config); 4228 } 4229 4230 // init transport 4231 if (hci_stack->hci_transport->init){ 4232 hci_stack->hci_transport->init(hci_stack->config); 4233 } 4234 4235 // open transport 4236 err = hci_stack->hci_transport->open(); 4237 if (err){ 4238 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4239 if (hci_stack->control && hci_stack->control->off){ 4240 (*hci_stack->control->off)(); 4241 } 4242 hci_emit_hci_open_failed(); 4243 return err; 4244 } 4245 return 0; 4246 } 4247 4248 static void hci_power_control_off(void){ 4249 4250 log_info("hci_power_control_off"); 4251 4252 // close low-level device 4253 hci_stack->hci_transport->close(); 4254 4255 log_info("hci_power_control_off - hci_transport closed"); 4256 4257 // power off 4258 if (hci_stack->control && hci_stack->control->off){ 4259 (*hci_stack->control->off)(); 4260 } 4261 4262 log_info("hci_power_control_off - control closed"); 4263 4264 hci_stack->state = HCI_STATE_OFF; 4265 } 4266 4267 static void hci_power_control_sleep(void){ 4268 4269 log_info("hci_power_control_sleep"); 4270 4271 #if 0 4272 // don't close serial port during sleep 4273 4274 // close low-level device 4275 hci_stack->hci_transport->close(hci_stack->config); 4276 #endif 4277 4278 // sleep mode 4279 if (hci_stack->control && hci_stack->control->sleep){ 4280 (*hci_stack->control->sleep)(); 4281 } 4282 4283 hci_stack->state = HCI_STATE_SLEEPING; 4284 } 4285 4286 static int hci_power_control_wake(void){ 4287 4288 log_info("hci_power_control_wake"); 4289 4290 // wake on 4291 if (hci_stack->control && hci_stack->control->wake){ 4292 (*hci_stack->control->wake)(); 4293 } 4294 4295 #if 0 4296 // open low-level device 4297 int err = hci_stack->hci_transport->open(hci_stack->config); 4298 if (err){ 4299 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4300 if (hci_stack->control && hci_stack->control->off){ 4301 (*hci_stack->control->off)(); 4302 } 4303 hci_emit_hci_open_failed(); 4304 return err; 4305 } 4306 #endif 4307 4308 return 0; 4309 } 4310 4311 static void hci_power_enter_initializing_state(void){ 4312 // set up state machine 4313 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4314 hci_stack->hci_packet_buffer_reserved = false; 4315 hci_stack->state = HCI_STATE_INITIALIZING; 4316 hci_stack->substate = HCI_INIT_SEND_RESET; 4317 } 4318 4319 static void hci_power_enter_halting_state(void){ 4320 #ifdef ENABLE_BLE 4321 hci_whitelist_free(); 4322 #endif 4323 // see hci_run 4324 hci_stack->state = HCI_STATE_HALTING; 4325 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4326 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4327 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4328 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4329 btstack_run_loop_add_timer(&hci_stack->timeout); 4330 } 4331 4332 // returns error 4333 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4334 int err; 4335 switch (power_mode){ 4336 case HCI_POWER_ON: 4337 err = hci_power_control_on(); 4338 if (err != 0) { 4339 log_error("hci_power_control_on() error %d", err); 4340 return err; 4341 } 4342 hci_power_enter_initializing_state(); 4343 break; 4344 case HCI_POWER_OFF: 4345 // do nothing 4346 break; 4347 case HCI_POWER_SLEEP: 4348 // do nothing (with SLEEP == OFF) 4349 break; 4350 default: 4351 btstack_assert(false); 4352 break; 4353 } 4354 return ERROR_CODE_SUCCESS; 4355 } 4356 4357 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4358 switch (power_mode){ 4359 case HCI_POWER_ON: 4360 // do nothing 4361 break; 4362 case HCI_POWER_OFF: 4363 // no connections yet, just turn it off 4364 hci_power_control_off(); 4365 break; 4366 case HCI_POWER_SLEEP: 4367 // no connections yet, just turn it off 4368 hci_power_control_sleep(); 4369 break; 4370 default: 4371 btstack_assert(false); 4372 break; 4373 } 4374 return ERROR_CODE_SUCCESS; 4375 } 4376 4377 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4378 switch (power_mode){ 4379 case HCI_POWER_ON: 4380 // do nothing 4381 break; 4382 case HCI_POWER_OFF: 4383 hci_power_enter_halting_state(); 4384 break; 4385 case HCI_POWER_SLEEP: 4386 // see hci_run 4387 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4388 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4389 break; 4390 default: 4391 btstack_assert(false); 4392 break; 4393 } 4394 return ERROR_CODE_SUCCESS; 4395 } 4396 4397 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4398 switch (power_mode){ 4399 case HCI_POWER_ON: 4400 hci_power_enter_initializing_state(); 4401 break; 4402 case HCI_POWER_OFF: 4403 // do nothing 4404 break; 4405 case HCI_POWER_SLEEP: 4406 // see hci_run 4407 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4408 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4409 break; 4410 default: 4411 btstack_assert(false); 4412 break; 4413 } 4414 return ERROR_CODE_SUCCESS; 4415 } 4416 4417 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4418 switch (power_mode){ 4419 case HCI_POWER_ON: 4420 hci_power_enter_initializing_state(); 4421 break; 4422 case HCI_POWER_OFF: 4423 hci_power_enter_halting_state(); 4424 break; 4425 case HCI_POWER_SLEEP: 4426 // do nothing 4427 break; 4428 default: 4429 btstack_assert(false); 4430 break; 4431 } 4432 return ERROR_CODE_SUCCESS; 4433 } 4434 4435 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4436 int err; 4437 switch (power_mode){ 4438 case HCI_POWER_ON: 4439 err = hci_power_control_wake(); 4440 if (err) return err; 4441 hci_power_enter_initializing_state(); 4442 break; 4443 case HCI_POWER_OFF: 4444 hci_power_enter_halting_state(); 4445 break; 4446 case HCI_POWER_SLEEP: 4447 // do nothing 4448 break; 4449 default: 4450 btstack_assert(false); 4451 break; 4452 } 4453 return ERROR_CODE_SUCCESS; 4454 } 4455 4456 int hci_power_control(HCI_POWER_MODE power_mode){ 4457 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4458 int err = 0; 4459 switch (hci_stack->state){ 4460 case HCI_STATE_OFF: 4461 err = hci_power_control_state_off(power_mode); 4462 break; 4463 case HCI_STATE_INITIALIZING: 4464 err = hci_power_control_state_initializing(power_mode); 4465 break; 4466 case HCI_STATE_WORKING: 4467 err = hci_power_control_state_working(power_mode); 4468 break; 4469 case HCI_STATE_HALTING: 4470 err = hci_power_control_state_halting(power_mode); 4471 break; 4472 case HCI_STATE_FALLING_ASLEEP: 4473 err = hci_power_control_state_falling_asleep(power_mode); 4474 break; 4475 case HCI_STATE_SLEEPING: 4476 err = hci_power_control_state_sleeping(power_mode); 4477 break; 4478 default: 4479 btstack_assert(false); 4480 break; 4481 } 4482 if (err != 0){ 4483 return err; 4484 } 4485 4486 // create internal event 4487 hci_emit_state(); 4488 4489 // trigger next/first action 4490 hci_run(); 4491 4492 return 0; 4493 } 4494 4495 4496 static void hci_halting_run(void) { 4497 4498 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4499 4500 hci_connection_t *connection; 4501 #ifdef ENABLE_BLE 4502 #ifdef ENABLE_LE_PERIPHERAL 4503 bool stop_advertismenets; 4504 #endif 4505 #endif 4506 4507 switch (hci_stack->substate) { 4508 case HCI_HALTING_CLASSIC_STOP: 4509 #ifdef ENABLE_CLASSIC 4510 if (!hci_can_send_command_packet_now()) return; 4511 4512 if (hci_stack->connectable || hci_stack->discoverable){ 4513 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4514 hci_send_cmd(&hci_write_scan_enable, 0); 4515 return; 4516 } 4517 #endif 4518 /* fall through */ 4519 4520 case HCI_HALTING_LE_ADV_STOP: 4521 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4522 4523 #ifdef ENABLE_BLE 4524 #ifdef ENABLE_LE_PERIPHERAL 4525 if (!hci_can_send_command_packet_now()) return; 4526 4527 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4528 4529 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4530 if (hci_extended_advertising_supported()){ 4531 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4532 btstack_linked_list_iterator_t it; 4533 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4534 // stop all periodic advertisements and check if an extended set is active 4535 while (btstack_linked_list_iterator_has_next(&it)){ 4536 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4537 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4538 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4539 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4540 return; 4541 } 4542 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4543 stop_advertismenets = true; 4544 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4545 } 4546 } 4547 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 4548 if (stop_advertismenets){ 4549 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4550 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4551 return; 4552 } 4553 } 4554 else 4555 #else 4556 { 4557 if (stop_advertismenets) { 4558 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4559 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4560 return; 4561 } 4562 } 4563 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4564 #endif /* ENABLE_LE_PERIPHERAL */ 4565 #endif /* ENABLE_BLE */ 4566 4567 /* fall through */ 4568 4569 case HCI_HALTING_LE_SCAN_STOP: 4570 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4571 if (!hci_can_send_command_packet_now()) return; 4572 4573 #ifdef ENABLE_BLE 4574 #ifdef ENABLE_LE_CENTRAL 4575 if (hci_stack->le_scanning_active){ 4576 hci_le_scan_stop(); 4577 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4578 return; 4579 } 4580 #endif 4581 #endif 4582 4583 /* fall through */ 4584 4585 case HCI_HALTING_DISCONNECT_ALL: 4586 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4587 if (!hci_can_send_command_packet_now()) return; 4588 4589 // close all open connections 4590 connection = (hci_connection_t *) hci_stack->connections; 4591 if (connection) { 4592 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4593 4594 // check state 4595 if (connection->state == SENT_DISCONNECT) return; 4596 connection->state = SENT_DISCONNECT; 4597 4598 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4599 4600 // finally, send the disconnect command 4601 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4602 return; 4603 } 4604 4605 btstack_run_loop_remove_timer(&hci_stack->timeout); 4606 4607 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4608 4609 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4610 log_info("HCI_STATE_HALTING: wait 50 ms"); 4611 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4612 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4613 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4614 btstack_run_loop_add_timer(&hci_stack->timeout); 4615 break; 4616 4617 case HCI_HALTING_CLOSE: 4618 // close left over connections (that had not been properly closed before) 4619 hci_discard_connections(); 4620 4621 log_info("HCI_STATE_HALTING, calling off"); 4622 4623 // switch mode 4624 hci_power_control_off(); 4625 4626 log_info("HCI_STATE_HALTING, emitting state"); 4627 hci_emit_state(); 4628 log_info("HCI_STATE_HALTING, done"); 4629 break; 4630 4631 case HCI_HALTING_W4_CLOSE_TIMER: 4632 // keep waiting 4633 4634 break; 4635 default: 4636 break; 4637 } 4638 }; 4639 4640 static void hci_falling_asleep_run(void){ 4641 hci_connection_t * connection; 4642 switch(hci_stack->substate) { 4643 case HCI_FALLING_ASLEEP_DISCONNECT: 4644 log_info("HCI_STATE_FALLING_ASLEEP"); 4645 // close all open connections 4646 connection = (hci_connection_t *) hci_stack->connections; 4647 if (connection){ 4648 4649 // send disconnect 4650 if (!hci_can_send_command_packet_now()) return; 4651 4652 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4653 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4654 4655 // send disconnected event right away - causes higher layer connections to get closed, too. 4656 hci_shutdown_connection(connection); 4657 return; 4658 } 4659 4660 if (hci_classic_supported()){ 4661 // disable page and inquiry scan 4662 if (!hci_can_send_command_packet_now()) return; 4663 4664 log_info("HCI_STATE_HALTING, disabling inq scans"); 4665 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4666 4667 // continue in next sub state 4668 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4669 break; 4670 } 4671 4672 /* fall through */ 4673 4674 case HCI_FALLING_ASLEEP_COMPLETE: 4675 log_info("HCI_STATE_HALTING, calling sleep"); 4676 // switch mode 4677 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4678 hci_emit_state(); 4679 break; 4680 4681 default: 4682 break; 4683 } 4684 } 4685 4686 #ifdef ENABLE_CLASSIC 4687 4688 static void hci_update_scan_enable(void){ 4689 // 2 = page scan, 1 = inq scan 4690 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4691 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4692 hci_run(); 4693 } 4694 4695 void gap_discoverable_control(uint8_t enable){ 4696 if (enable) enable = 1; // normalize argument 4697 4698 if (hci_stack->discoverable == enable){ 4699 hci_emit_discoverable_enabled(hci_stack->discoverable); 4700 return; 4701 } 4702 4703 hci_stack->discoverable = enable; 4704 hci_update_scan_enable(); 4705 } 4706 4707 void gap_connectable_control(uint8_t enable){ 4708 if (enable) enable = 1; // normalize argument 4709 4710 // don't emit event 4711 if (hci_stack->connectable == enable) return; 4712 4713 hci_stack->connectable = enable; 4714 hci_update_scan_enable(); 4715 } 4716 #endif 4717 4718 void gap_local_bd_addr(bd_addr_t address_buffer){ 4719 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4720 } 4721 4722 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4723 static void hci_host_num_completed_packets(void){ 4724 4725 // create packet manually as arrays are not supported and num_commands should not get reduced 4726 hci_reserve_packet_buffer(); 4727 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4728 4729 uint16_t size = 0; 4730 uint16_t num_handles = 0; 4731 packet[size++] = 0x35; 4732 packet[size++] = 0x0c; 4733 size++; // skip param len 4734 size++; // skip num handles 4735 4736 // add { handle, packets } entries 4737 btstack_linked_item_t * it; 4738 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4739 hci_connection_t * connection = (hci_connection_t *) it; 4740 if (connection->num_packets_completed){ 4741 little_endian_store_16(packet, size, connection->con_handle); 4742 size += 2; 4743 little_endian_store_16(packet, size, connection->num_packets_completed); 4744 size += 2; 4745 // 4746 num_handles++; 4747 connection->num_packets_completed = 0; 4748 } 4749 } 4750 4751 packet[2] = size - 3; 4752 packet[3] = num_handles; 4753 4754 hci_stack->host_completed_packets = 0; 4755 4756 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4757 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4758 4759 // release packet buffer for synchronous transport implementations 4760 if (hci_transport_synchronous()){ 4761 hci_release_packet_buffer(); 4762 hci_emit_transport_packet_sent(); 4763 } 4764 } 4765 #endif 4766 4767 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4768 UNUSED(ds); 4769 hci_stack->substate = HCI_HALTING_CLOSE; 4770 // allow packet handlers to defer final shutdown 4771 hci_emit_state(); 4772 hci_run(); 4773 } 4774 4775 static bool hci_run_acl_fragments(void){ 4776 if (hci_stack->acl_fragmentation_total_size > 0u) { 4777 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4778 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4779 if (connection) { 4780 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4781 hci_send_acl_packet_fragments(connection); 4782 return true; 4783 } 4784 } else { 4785 // connection gone -> discard further fragments 4786 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4787 hci_stack->acl_fragmentation_total_size = 0; 4788 hci_stack->acl_fragmentation_pos = 0; 4789 } 4790 } 4791 return false; 4792 } 4793 4794 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4795 static bool hci_run_iso_fragments(void){ 4796 if (hci_stack->iso_fragmentation_total_size > 0u) { 4797 // TODO: flow control 4798 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 4799 hci_send_iso_packet_fragments(); 4800 return true; 4801 } 4802 } 4803 return false; 4804 } 4805 #endif 4806 4807 #ifdef ENABLE_CLASSIC 4808 4809 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4810 static bool hci_classic_operation_active(void) { 4811 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4812 return true; 4813 } 4814 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4815 return true; 4816 } 4817 btstack_linked_item_t * it; 4818 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4819 hci_connection_t *connection = (hci_connection_t *) it; 4820 switch (connection->state) { 4821 case SENT_CREATE_CONNECTION: 4822 case SENT_CANCEL_CONNECTION: 4823 case SENT_DISCONNECT: 4824 return true; 4825 default: 4826 break; 4827 } 4828 } 4829 return false; 4830 } 4831 #endif 4832 4833 static bool hci_run_general_gap_classic(void){ 4834 4835 // assert stack is working and classic is active 4836 if (hci_classic_supported() == false) return false; 4837 if (hci_stack->state != HCI_STATE_WORKING) return false; 4838 4839 // decline incoming connections 4840 if (hci_stack->decline_reason){ 4841 uint8_t reason = hci_stack->decline_reason; 4842 hci_stack->decline_reason = 0; 4843 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4844 return true; 4845 } 4846 4847 if (hci_stack->gap_tasks_classic != 0){ 4848 hci_run_gap_tasks_classic(); 4849 return true; 4850 } 4851 4852 // start/stop inquiry 4853 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4854 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4855 if (hci_classic_operation_active() == false) 4856 #endif 4857 { 4858 uint8_t duration = hci_stack->inquiry_state; 4859 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4860 if (hci_stack->inquiry_max_period_length != 0){ 4861 hci_send_cmd(&hci_periodic_inquiry_mode, hci_stack->inquiry_max_period_length, hci_stack->inquiry_min_period_length, hci_stack->inquiry_lap, duration, 0); 4862 } else { 4863 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4864 } 4865 return true; 4866 } 4867 } 4868 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4869 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4870 hci_send_cmd(&hci_inquiry_cancel); 4871 return true; 4872 } 4873 4874 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 4875 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4876 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 4877 return true; 4878 } 4879 4880 // remote name request 4881 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4882 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4883 if (hci_classic_operation_active() == false) 4884 #endif 4885 { 4886 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4887 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4888 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4889 return true; 4890 } 4891 } 4892 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4893 // Local OOB data 4894 if (hci_stack->classic_read_local_oob_data){ 4895 hci_stack->classic_read_local_oob_data = false; 4896 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4897 hci_send_cmd(&hci_read_local_extended_oob_data); 4898 } else { 4899 hci_send_cmd(&hci_read_local_oob_data); 4900 } 4901 } 4902 #endif 4903 // pairing 4904 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4905 uint8_t state = hci_stack->gap_pairing_state; 4906 uint8_t pin_code[16]; 4907 switch (state){ 4908 case GAP_PAIRING_STATE_SEND_PIN: 4909 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4910 memset(pin_code, 0, 16); 4911 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4912 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4913 break; 4914 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4915 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4916 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4917 break; 4918 case GAP_PAIRING_STATE_SEND_PASSKEY: 4919 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4920 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4921 break; 4922 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4923 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4924 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4925 break; 4926 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4927 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4928 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4929 break; 4930 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4931 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4932 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4933 break; 4934 default: 4935 break; 4936 } 4937 return true; 4938 } 4939 return false; 4940 } 4941 #endif 4942 4943 #ifdef ENABLE_BLE 4944 4945 #ifdef ENABLE_LE_CENTRAL 4946 static void hci_le_scan_stop(void){ 4947 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4948 if (hci_extended_advertising_supported()) { 4949 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4950 } else 4951 #endif 4952 { 4953 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4954 } 4955 } 4956 #endif 4957 4958 #ifdef ENABLE_LE_PERIPHERAL 4959 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4960 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4961 uint8_t operation = 0; 4962 if (pos == 0){ 4963 // first fragment or complete data 4964 operation |= 1; 4965 } 4966 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4967 // last fragment or complete data 4968 operation |= 2; 4969 } 4970 return operation; 4971 } 4972 #endif 4973 #endif 4974 4975 static bool hci_run_general_gap_le(void){ 4976 4977 btstack_linked_list_iterator_t lit; 4978 4979 // Phase 1: collect what to stop 4980 4981 #ifdef ENABLE_LE_CENTRAL 4982 bool scanning_stop = false; 4983 bool connecting_stop = false; 4984 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4985 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4986 bool periodic_sync_stop = false; 4987 #endif 4988 #endif 4989 #endif 4990 4991 #ifdef ENABLE_LE_PERIPHERAL 4992 bool advertising_stop = false; 4993 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4994 le_advertising_set_t * advertising_stop_set = NULL; 4995 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4996 bool periodic_advertising_stop = false; 4997 #endif 4998 #endif 4999 #endif 5000 5001 // check if own address changes 5002 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5003 5004 // check if whitelist needs modification 5005 bool whitelist_modification_pending = false; 5006 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5007 while (btstack_linked_list_iterator_has_next(&lit)){ 5008 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5009 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5010 whitelist_modification_pending = true; 5011 break; 5012 } 5013 } 5014 5015 // check if resolving list needs modification 5016 bool resolving_list_modification_pending = false; 5017 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5018 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5019 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5020 resolving_list_modification_pending = true; 5021 } 5022 #endif 5023 5024 #ifdef ENABLE_LE_CENTRAL 5025 5026 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5027 // check if periodic advertiser list needs modification 5028 bool periodic_list_modification_pending = false; 5029 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5030 while (btstack_linked_list_iterator_has_next(&lit)){ 5031 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5032 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5033 periodic_list_modification_pending = true; 5034 break; 5035 } 5036 } 5037 #endif 5038 5039 // scanning control 5040 if (hci_stack->le_scanning_active) { 5041 // stop if: 5042 // - parameter change required 5043 // - it's disabled 5044 // - whitelist change required but used for scanning 5045 // - resolving list modified 5046 // - own address changes 5047 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5048 if ((hci_stack->le_scanning_param_update) || 5049 !hci_stack->le_scanning_enabled || 5050 (scanning_uses_whitelist && whitelist_modification_pending) || 5051 resolving_list_modification_pending || 5052 random_address_change){ 5053 5054 scanning_stop = true; 5055 } 5056 } 5057 5058 // connecting control 5059 bool connecting_with_whitelist; 5060 switch (hci_stack->le_connecting_state){ 5061 case LE_CONNECTING_DIRECT: 5062 case LE_CONNECTING_WHITELIST: 5063 // stop connecting if: 5064 // - connecting uses white and whitelist modification pending 5065 // - if it got disabled 5066 // - resolving list modified 5067 // - own address changes 5068 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5069 if ((connecting_with_whitelist && whitelist_modification_pending) || 5070 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5071 resolving_list_modification_pending || 5072 random_address_change) { 5073 5074 connecting_stop = true; 5075 } 5076 break; 5077 default: 5078 break; 5079 } 5080 5081 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5082 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5083 // periodic sync control 5084 bool sync_with_advertiser_list; 5085 switch(hci_stack->le_periodic_sync_state){ 5086 case LE_CONNECTING_DIRECT: 5087 case LE_CONNECTING_WHITELIST: 5088 // stop sync if: 5089 // - sync with advertiser list and advertiser list modification pending 5090 // - if it got disabled 5091 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5092 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5093 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5094 periodic_sync_stop = true; 5095 } 5096 break; 5097 default: 5098 break; 5099 } 5100 #endif 5101 #endif 5102 5103 #endif /* ENABLE_LE_CENTRAL */ 5104 5105 #ifdef ENABLE_LE_PERIPHERAL 5106 // le advertisement control 5107 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5108 // stop if: 5109 // - parameter change required 5110 // - random address used in advertising and changes 5111 // - it's disabled 5112 // - whitelist change required but used for advertisement filter policy 5113 // - resolving list modified 5114 // - own address changes 5115 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5116 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5117 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5118 if (advertising_change || 5119 (advertising_uses_random_address && random_address_change) || 5120 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5121 (advertising_uses_whitelist && whitelist_modification_pending) || 5122 resolving_list_modification_pending || 5123 random_address_change) { 5124 5125 advertising_stop = true; 5126 } 5127 } 5128 5129 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5130 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5131 btstack_linked_list_iterator_t it; 5132 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5133 while (btstack_linked_list_iterator_has_next(&it)){ 5134 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5135 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5136 // stop if: 5137 // - parameter change required 5138 // - random address used in connectable advertising and changes 5139 // - it's disabled 5140 // - whitelist change required but used for advertisement filter policy 5141 // - resolving list modified 5142 // - own address changes 5143 // - advertisement set will be removed 5144 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5145 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5146 bool advertising_uses_random_address = 5147 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5148 advertising_connectable; 5149 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5150 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5151 bool advertising_set_random_address_change = 5152 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5153 bool advertising_set_will_be_removed = 5154 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5155 if (advertising_parameter_change || 5156 (advertising_uses_random_address && advertising_set_random_address_change) || 5157 (advertising_enabled == false) || 5158 (advertising_uses_whitelist && whitelist_modification_pending) || 5159 resolving_list_modification_pending || 5160 advertising_set_will_be_removed) { 5161 5162 advertising_stop = true; 5163 advertising_stop_set = advertising_set; 5164 break; 5165 } 5166 } 5167 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5168 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5169 // stop if: 5170 // - it's disabled 5171 // - parameter change required 5172 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5173 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5174 if ((periodic_enabled == false) || periodic_parameter_change){ 5175 periodic_advertising_stop = true; 5176 advertising_stop_set = advertising_set; 5177 } 5178 } 5179 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5180 } 5181 } 5182 #endif 5183 5184 #endif 5185 5186 5187 // Phase 2: stop everything that should be off during modifications 5188 5189 #ifdef ENABLE_LE_CENTRAL 5190 if (scanning_stop){ 5191 hci_stack->le_scanning_active = false; 5192 hci_le_scan_stop(); 5193 return true; 5194 } 5195 5196 if (connecting_stop){ 5197 hci_send_cmd(&hci_le_create_connection_cancel); 5198 return true; 5199 } 5200 5201 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5202 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5203 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5204 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5205 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5206 return true; 5207 } 5208 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5209 if (periodic_sync_stop){ 5210 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5211 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5212 return true; 5213 } 5214 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5215 #endif 5216 #endif 5217 5218 #ifdef ENABLE_LE_PERIPHERAL 5219 if (advertising_stop){ 5220 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5221 if (hci_extended_advertising_supported()) { 5222 uint8_t advertising_stop_handle; 5223 if (advertising_stop_set != NULL){ 5224 advertising_stop_handle = advertising_stop_set->advertising_handle; 5225 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5226 } else { 5227 advertising_stop_handle = 0; 5228 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5229 } 5230 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5231 const uint16_t durations[] = { 0 }; 5232 const uint16_t max_events[] = { 0 }; 5233 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5234 } else 5235 #endif 5236 { 5237 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5238 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5239 } 5240 return true; 5241 } 5242 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5243 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5244 if (periodic_advertising_stop){ 5245 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5246 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5247 return true; 5248 } 5249 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5250 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5251 #endif 5252 5253 // Phase 3: modify 5254 5255 if (random_address_change){ 5256 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5257 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5258 if (hci_extended_advertising_supported()) { 5259 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5260 } 5261 #endif 5262 { 5263 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5264 } 5265 return true; 5266 } 5267 5268 #ifdef ENABLE_LE_CENTRAL 5269 if (hci_stack->le_scanning_param_update){ 5270 hci_stack->le_scanning_param_update = false; 5271 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5272 if (hci_extended_advertising_supported()){ 5273 // prepare arrays for all PHYs 5274 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5275 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5276 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5277 uint8_t scanning_phys = 1; // LE 1M PHY 5278 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5279 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5280 } else 5281 #endif 5282 { 5283 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5284 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5285 } 5286 return true; 5287 } 5288 #endif 5289 5290 #ifdef ENABLE_LE_PERIPHERAL 5291 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5292 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5293 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5294 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5295 if (hci_extended_advertising_supported()){ 5296 // map advertisment type to advertising event properties 5297 uint16_t adv_event_properties = 0; 5298 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5299 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5300 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5301 } 5302 hci_stack->le_advertising_set_in_current_command = 0; 5303 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5304 0, 5305 adv_event_properties, 5306 hci_stack->le_advertisements_interval_min, 5307 hci_stack->le_advertisements_interval_max, 5308 hci_stack->le_advertisements_channel_map, 5309 hci_stack->le_advertisements_own_addr_type, 5310 hci_stack->le_advertisements_direct_address_type, 5311 hci_stack->le_advertisements_direct_address, 5312 hci_stack->le_advertisements_filter_policy, 5313 0x7f, // tx power: no preference 5314 0x01, // primary adv phy: LE 1M 5315 0, // secondary adv max skip 5316 0, // secondary adv phy 5317 0, // adv sid 5318 0 // scan request notification 5319 ); 5320 } 5321 #endif 5322 { 5323 hci_send_cmd(&hci_le_set_advertising_parameters, 5324 hci_stack->le_advertisements_interval_min, 5325 hci_stack->le_advertisements_interval_max, 5326 hci_stack->le_advertisements_type, 5327 hci_stack->le_advertisements_own_addr_type, 5328 hci_stack->le_advertisements_direct_address_type, 5329 hci_stack->le_advertisements_direct_address, 5330 hci_stack->le_advertisements_channel_map, 5331 hci_stack->le_advertisements_filter_policy); 5332 } 5333 return true; 5334 } 5335 5336 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5337 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5338 uint8_t adv_data_clean[31]; 5339 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5340 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5341 hci_stack->le_advertisements_data_len); 5342 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5343 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5344 if (hci_extended_advertising_supported()){ 5345 hci_stack->le_advertising_set_in_current_command = 0; 5346 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5347 } else 5348 #endif 5349 { 5350 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5351 } 5352 return true; 5353 } 5354 5355 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5356 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5357 uint8_t scan_data_clean[31]; 5358 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5359 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5360 hci_stack->le_scan_response_data_len); 5361 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5362 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5363 if (hci_extended_advertising_supported()){ 5364 hci_stack->le_advertising_set_in_current_command = 0; 5365 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5366 } else 5367 #endif 5368 { 5369 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5370 } 5371 return true; 5372 } 5373 5374 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5375 if (hci_extended_advertising_supported()) { 5376 btstack_linked_list_iterator_t it; 5377 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5378 while (btstack_linked_list_iterator_has_next(&it)){ 5379 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5380 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5381 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5382 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5383 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5384 return true; 5385 } 5386 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5387 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5388 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5389 return true; 5390 } 5391 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5392 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5393 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5394 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5395 advertising_set->advertising_handle, 5396 advertising_set->extended_params.advertising_event_properties, 5397 advertising_set->extended_params.primary_advertising_interval_min, 5398 advertising_set->extended_params.primary_advertising_interval_max, 5399 advertising_set->extended_params.primary_advertising_channel_map, 5400 advertising_set->extended_params.own_address_type, 5401 advertising_set->extended_params.peer_address_type, 5402 advertising_set->extended_params.peer_address, 5403 advertising_set->extended_params.advertising_filter_policy, 5404 advertising_set->extended_params.advertising_tx_power, 5405 advertising_set->extended_params.primary_advertising_phy, 5406 advertising_set->extended_params.secondary_advertising_max_skip, 5407 advertising_set->extended_params.secondary_advertising_phy, 5408 advertising_set->extended_params.advertising_sid, 5409 advertising_set->extended_params.scan_request_notification_enable 5410 ); 5411 return true; 5412 } 5413 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5414 uint16_t pos = advertising_set->adv_data_pos; 5415 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5416 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5417 if ((operation & 0x02) != 0){ 5418 // last fragment or complete data 5419 operation |= 2; 5420 advertising_set->adv_data_pos = 0; 5421 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5422 } else { 5423 advertising_set->adv_data_pos += data_to_upload; 5424 } 5425 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5426 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5427 return true; 5428 } 5429 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5430 uint16_t pos = advertising_set->scan_data_pos; 5431 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5432 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5433 if ((operation & 0x02) != 0){ 5434 advertising_set->scan_data_pos = 0; 5435 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5436 } else { 5437 advertising_set->scan_data_pos += data_to_upload; 5438 } 5439 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5440 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5441 return true; 5442 } 5443 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5444 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5445 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5446 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5447 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5448 advertising_set->advertising_handle, 5449 advertising_set->periodic_params.periodic_advertising_interval_min, 5450 advertising_set->periodic_params.periodic_advertising_interval_max, 5451 advertising_set->periodic_params.periodic_advertising_properties); 5452 return true; 5453 } 5454 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5455 uint16_t pos = advertising_set->periodic_data_pos; 5456 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5457 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5458 if ((operation & 0x02) != 0){ 5459 // last fragment or complete data 5460 operation |= 2; 5461 advertising_set->periodic_data_pos = 0; 5462 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5463 } else { 5464 advertising_set->periodic_data_pos += data_to_upload; 5465 } 5466 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5467 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5468 return true; 5469 } 5470 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5471 } 5472 } 5473 #endif 5474 5475 #endif 5476 5477 #ifdef ENABLE_LE_CENTRAL 5478 // if connect with whitelist was active and is not cancelled yet, wait until next time 5479 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5480 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5481 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 5482 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 5483 #endif 5484 #endif 5485 5486 // LE Whitelist Management 5487 if (whitelist_modification_pending){ 5488 // add/remove entries 5489 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5490 while (btstack_linked_list_iterator_has_next(&lit)){ 5491 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5492 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5493 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5494 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5495 return true; 5496 } 5497 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5498 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5499 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5500 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5501 return true; 5502 } 5503 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5504 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5505 btstack_memory_whitelist_entry_free(entry); 5506 } 5507 } 5508 } 5509 5510 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5511 // LE Resolving List Management 5512 if (resolving_list_supported) { 5513 uint16_t i; 5514 switch (hci_stack->le_resolving_list_state) { 5515 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5516 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5517 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5518 return true; 5519 case LE_RESOLVING_LIST_READ_SIZE: 5520 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5521 hci_send_cmd(&hci_le_read_resolving_list_size); 5522 return true; 5523 case LE_RESOLVING_LIST_SEND_CLEAR: 5524 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5525 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5526 sizeof(hci_stack->le_resolving_list_add_entries)); 5527 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5528 sizeof(hci_stack->le_resolving_list_remove_entries)); 5529 hci_send_cmd(&hci_le_clear_resolving_list); 5530 return true; 5531 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5532 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5533 uint8_t offset = i >> 3; 5534 uint8_t mask = 1 << (i & 7); 5535 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5536 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5537 bd_addr_t peer_identity_addreses; 5538 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5539 sm_key_t peer_irk; 5540 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5541 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5542 5543 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5544 // trigger whitelist entry 'update' (work around for controller bug) 5545 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5546 while (btstack_linked_list_iterator_has_next(&lit)) { 5547 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5548 if (entry->address_type != peer_identity_addr_type) continue; 5549 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5550 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5551 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5552 } 5553 #endif 5554 5555 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5556 peer_identity_addreses); 5557 return true; 5558 } 5559 5560 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5561 5562 /* fall through */ 5563 5564 case LE_RESOLVING_LIST_ADD_ENTRIES: 5565 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5566 uint8_t offset = i >> 3; 5567 uint8_t mask = 1 << (i & 7); 5568 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5569 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5570 bd_addr_t peer_identity_addreses; 5571 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5572 sm_key_t peer_irk; 5573 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5574 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5575 const uint8_t *local_irk = gap_get_persistent_irk(); 5576 // command uses format specifier 'P' that stores 16-byte value without flip 5577 uint8_t local_irk_flipped[16]; 5578 uint8_t peer_irk_flipped[16]; 5579 reverse_128(local_irk, local_irk_flipped); 5580 reverse_128(peer_irk, peer_irk_flipped); 5581 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5582 peer_irk_flipped, local_irk_flipped); 5583 return true; 5584 } 5585 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5586 break; 5587 5588 default: 5589 break; 5590 } 5591 } 5592 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5593 #endif 5594 5595 #ifdef ENABLE_LE_CENTRAL 5596 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5597 // LE Whitelist Management 5598 if (periodic_list_modification_pending){ 5599 // add/remove entries 5600 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5601 while (btstack_linked_list_iterator_has_next(&lit)){ 5602 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5603 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 5604 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 5605 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 5606 return true; 5607 } 5608 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 5609 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 5610 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 5611 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address); 5612 return true; 5613 } 5614 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 5615 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 5616 btstack_memory_periodic_advertiser_list_entry_free(entry); 5617 } 5618 } 5619 } 5620 #endif 5621 #endif 5622 5623 // post-pone all actions until stack is fully working 5624 if (hci_stack->state != HCI_STATE_WORKING) return false; 5625 5626 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5627 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5628 5629 // Phase 4: restore state 5630 5631 #ifdef ENABLE_LE_CENTRAL 5632 // re-start scanning 5633 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5634 hci_stack->le_scanning_active = true; 5635 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5636 if (hci_extended_advertising_supported()){ 5637 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5638 } else 5639 #endif 5640 { 5641 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5642 } 5643 return true; 5644 } 5645 #endif 5646 5647 #ifdef ENABLE_LE_CENTRAL 5648 // re-start connecting 5649 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5650 bd_addr_t null_addr; 5651 memset(null_addr, 0, 6); 5652 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5653 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5654 hci_send_cmd(&hci_le_create_connection, 5655 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5656 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5657 1, // use whitelist 5658 0, // peer address type 5659 null_addr, // peer bd addr 5660 hci_stack->le_connection_own_addr_type, // our addr type: 5661 hci_stack->le_connection_interval_min, // conn interval min 5662 hci_stack->le_connection_interval_max, // conn interval max 5663 hci_stack->le_connection_latency, // conn latency 5664 hci_stack->le_supervision_timeout, // conn latency 5665 hci_stack->le_minimum_ce_length, // min ce length 5666 hci_stack->le_maximum_ce_length // max ce length 5667 ); 5668 return true; 5669 } 5670 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5671 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 5672 switch(hci_stack->le_periodic_sync_request){ 5673 case LE_CONNECTING_DIRECT: 5674 case LE_CONNECTING_WHITELIST: 5675 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 5676 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 5677 hci_stack->le_periodic_sync_options, 5678 hci_stack->le_periodic_sync_advertising_sid, 5679 hci_stack->le_periodic_sync_advertiser_address_type, 5680 hci_stack->le_periodic_sync_advertiser_address, 5681 hci_stack->le_periodic_sync_skip, 5682 hci_stack->le_periodic_sync_timeout, 5683 hci_stack->le_periodic_sync_cte_type); 5684 return true; 5685 default: 5686 break; 5687 } 5688 } 5689 #endif 5690 #endif 5691 5692 #ifdef ENABLE_LE_PERIPHERAL 5693 // re-start advertising 5694 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5695 // check if advertisements should be enabled given 5696 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5697 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5698 5699 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5700 if (hci_extended_advertising_supported()){ 5701 const uint8_t advertising_handles[] = { 0 }; 5702 const uint16_t durations[] = { 0 }; 5703 const uint16_t max_events[] = { 0 }; 5704 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5705 } else 5706 #endif 5707 { 5708 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5709 } 5710 return true; 5711 } 5712 5713 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5714 if (hci_extended_advertising_supported()) { 5715 btstack_linked_list_iterator_t it; 5716 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5717 while (btstack_linked_list_iterator_has_next(&it)) { 5718 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5719 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5720 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5721 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5722 const uint16_t durations[] = { advertising_set->enable_timeout }; 5723 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5724 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5725 return true; 5726 } 5727 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5728 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5729 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5730 uint8_t enable = 1; 5731 if (advertising_set->periodic_include_adi){ 5732 enable |= 2; 5733 } 5734 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5735 return true; 5736 } 5737 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5738 } 5739 } 5740 #endif 5741 #endif 5742 5743 return false; 5744 } 5745 #endif 5746 5747 static bool hci_run_general_pending_commands(void){ 5748 btstack_linked_item_t * it; 5749 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5750 hci_connection_t * connection = (hci_connection_t *) it; 5751 5752 switch(connection->state){ 5753 case SEND_CREATE_CONNECTION: 5754 switch(connection->address_type){ 5755 #ifdef ENABLE_CLASSIC 5756 case BD_ADDR_TYPE_ACL: 5757 log_info("sending hci_create_connection"); 5758 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5759 break; 5760 #endif 5761 default: 5762 #ifdef ENABLE_BLE 5763 #ifdef ENABLE_LE_CENTRAL 5764 log_info("sending hci_le_create_connection"); 5765 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5766 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5767 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5768 if (hci_extended_advertising_supported()) { 5769 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 5770 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 5771 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 5772 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 5773 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 5774 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 5775 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 5776 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 5777 hci_send_cmd(&hci_le_extended_create_connection, 5778 0, // don't use whitelist 5779 hci_stack->le_connection_own_addr_type, // our addr type: 5780 connection->address_type, // peer address type 5781 connection->address, // peer bd addr 5782 1, // initiating PHY - 1M 5783 le_connection_scan_interval, // conn scan interval 5784 le_connection_scan_window, // conn scan windows 5785 le_connection_interval_min, // conn interval min 5786 le_connection_interval_max, // conn interval max 5787 le_connection_latency, // conn latency 5788 le_supervision_timeout, // conn latency 5789 le_minimum_ce_length, // min ce length 5790 le_maximum_ce_length // max ce length 5791 ); } 5792 else 5793 #endif 5794 { 5795 hci_send_cmd(&hci_le_create_connection, 5796 hci_stack->le_connection_scan_interval, // conn scan interval 5797 hci_stack->le_connection_scan_window, // conn scan windows 5798 0, // don't use whitelist 5799 connection->address_type, // peer address type 5800 connection->address, // peer bd addr 5801 hci_stack->le_connection_own_addr_type, // our addr type: 5802 hci_stack->le_connection_interval_min, // conn interval min 5803 hci_stack->le_connection_interval_max, // conn interval max 5804 hci_stack->le_connection_latency, // conn latency 5805 hci_stack->le_supervision_timeout, // conn latency 5806 hci_stack->le_minimum_ce_length, // min ce length 5807 hci_stack->le_maximum_ce_length // max ce length 5808 ); 5809 } 5810 connection->state = SENT_CREATE_CONNECTION; 5811 #endif 5812 #endif 5813 break; 5814 } 5815 return true; 5816 5817 #ifdef ENABLE_CLASSIC 5818 case RECEIVED_CONNECTION_REQUEST: 5819 connection->role = HCI_ROLE_SLAVE; 5820 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5821 log_info("sending hci_accept_connection_request"); 5822 connection->state = ACCEPTED_CONNECTION_REQUEST; 5823 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5824 return true; 5825 } 5826 break; 5827 #endif 5828 5829 #ifdef ENABLE_BLE 5830 #ifdef ENABLE_LE_CENTRAL 5831 case SEND_CANCEL_CONNECTION: 5832 connection->state = SENT_CANCEL_CONNECTION; 5833 hci_send_cmd(&hci_le_create_connection_cancel); 5834 return true; 5835 #endif 5836 #endif 5837 case SEND_DISCONNECT: 5838 connection->state = SENT_DISCONNECT; 5839 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5840 return true; 5841 5842 default: 5843 break; 5844 } 5845 5846 // no further commands if connection is about to get shut down 5847 if (connection->state == SENT_DISCONNECT) continue; 5848 5849 #ifdef ENABLE_CLASSIC 5850 5851 // Handling link key request requires remote supported features 5852 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5853 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5854 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5855 5856 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5857 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5858 if (have_link_key && security_level_sufficient){ 5859 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5860 } else { 5861 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5862 } 5863 return true; 5864 } 5865 5866 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5867 log_info("denying to pin request"); 5868 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5869 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5870 return true; 5871 } 5872 5873 // security assessment requires remote features 5874 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5875 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5876 hci_ssp_assess_security_on_io_cap_request(connection); 5877 // 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 5878 } 5879 5880 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5881 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5882 // set authentication requirements: 5883 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5884 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5885 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5886 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5887 authreq |= 1; 5888 } 5889 bool bonding = hci_stack->bondable; 5890 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5891 // if we have received IO Cap Response, we're in responder role 5892 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5893 if (bonding && !remote_bonding){ 5894 log_info("Remote not bonding, dropping local flag"); 5895 bonding = false; 5896 } 5897 } 5898 if (bonding){ 5899 if (connection->bonding_flags & BONDING_DEDICATED){ 5900 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5901 } else { 5902 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5903 } 5904 } 5905 uint8_t have_oob_data = 0; 5906 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5907 if (connection->classic_oob_c_192 != NULL){ 5908 have_oob_data |= 1; 5909 } 5910 if (connection->classic_oob_c_256 != NULL){ 5911 have_oob_data |= 2; 5912 } 5913 #endif 5914 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5915 return true; 5916 } 5917 5918 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5919 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5920 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5921 return true; 5922 } 5923 5924 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5925 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5926 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5927 const uint8_t zero[16] = { 0 }; 5928 const uint8_t * r_192 = zero; 5929 const uint8_t * c_192 = zero; 5930 const uint8_t * r_256 = zero; 5931 const uint8_t * c_256 = zero; 5932 // verify P-256 OOB 5933 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5934 c_256 = connection->classic_oob_c_256; 5935 if (connection->classic_oob_r_256 != NULL) { 5936 r_256 = connection->classic_oob_r_256; 5937 } 5938 } 5939 // verify P-192 OOB 5940 if ((connection->classic_oob_c_192 != NULL)) { 5941 c_192 = connection->classic_oob_c_192; 5942 if (connection->classic_oob_r_192 != NULL) { 5943 r_192 = connection->classic_oob_r_192; 5944 } 5945 } 5946 5947 // assess security 5948 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5949 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5950 if (need_level_4 && !can_reach_level_4){ 5951 log_info("Level 4 required, but not possible -> abort"); 5952 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5953 // send oob negative reply 5954 c_256 = NULL; 5955 c_192 = NULL; 5956 } 5957 5958 // Reply 5959 if (c_256 != zero) { 5960 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5961 } else if (c_192 != zero){ 5962 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5963 } else { 5964 hci_stack->classic_oob_con_handle = connection->con_handle; 5965 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5966 } 5967 return true; 5968 } 5969 #endif 5970 5971 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5972 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5973 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5974 return true; 5975 } 5976 5977 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5978 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5979 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5980 return true; 5981 } 5982 5983 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5984 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5985 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5986 return true; 5987 } 5988 5989 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5990 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5991 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5992 connection->state = SENT_DISCONNECT; 5993 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5994 return true; 5995 } 5996 5997 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5998 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5999 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6000 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6001 return true; 6002 } 6003 6004 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6005 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6006 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6007 return true; 6008 } 6009 6010 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6011 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6012 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6013 return true; 6014 } 6015 6016 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6017 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6018 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6019 return true; 6020 } 6021 6022 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6023 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6024 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6025 return true; 6026 } 6027 6028 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6029 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6030 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6031 return true; 6032 } 6033 #endif 6034 6035 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6036 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6037 #ifdef ENABLE_CLASSIC 6038 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6039 #endif 6040 if (connection->state != SENT_DISCONNECT){ 6041 connection->state = SENT_DISCONNECT; 6042 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6043 return true; 6044 } 6045 } 6046 6047 #ifdef ENABLE_CLASSIC 6048 uint16_t sniff_min_interval; 6049 switch (connection->sniff_min_interval){ 6050 case 0: 6051 break; 6052 case 0xffff: 6053 connection->sniff_min_interval = 0; 6054 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6055 return true; 6056 default: 6057 sniff_min_interval = connection->sniff_min_interval; 6058 connection->sniff_min_interval = 0; 6059 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6060 return true; 6061 } 6062 6063 if (connection->sniff_subrating_max_latency != 0xffff){ 6064 uint16_t max_latency = connection->sniff_subrating_max_latency; 6065 connection->sniff_subrating_max_latency = 0; 6066 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6067 return true; 6068 } 6069 6070 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6071 uint8_t service_type = (uint8_t) connection->qos_service_type; 6072 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6073 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); 6074 return true; 6075 } 6076 6077 if (connection->request_role != HCI_ROLE_INVALID){ 6078 hci_role_t role = connection->request_role; 6079 connection->request_role = HCI_ROLE_INVALID; 6080 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6081 return true; 6082 } 6083 #endif 6084 6085 if (connection->gap_connection_tasks != 0){ 6086 #ifdef ENABLE_CLASSIC 6087 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6088 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6089 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6090 return true; 6091 } 6092 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6093 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6094 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6095 return true; 6096 } 6097 #endif 6098 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6099 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6100 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6101 return true; 6102 } 6103 } 6104 6105 #ifdef ENABLE_BLE 6106 switch (connection->le_con_parameter_update_state){ 6107 // response to L2CAP CON PARAMETER UPDATE REQUEST 6108 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6109 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6110 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6111 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6112 0x0000, 0xffff); 6113 return true; 6114 case CON_PARAMETER_UPDATE_REPLY: 6115 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6116 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6117 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6118 0x0000, 0xffff); 6119 return true; 6120 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6121 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6122 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6123 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6124 return true; 6125 default: 6126 break; 6127 } 6128 if (connection->le_phy_update_all_phys != 0xffu){ 6129 uint8_t all_phys = connection->le_phy_update_all_phys; 6130 connection->le_phy_update_all_phys = 0xff; 6131 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); 6132 return true; 6133 } 6134 #endif 6135 } 6136 return false; 6137 } 6138 6139 static void hci_run(void){ 6140 6141 // stack state sub statemachines 6142 switch (hci_stack->state) { 6143 case HCI_STATE_INITIALIZING: 6144 hci_initializing_run(); 6145 break; 6146 case HCI_STATE_HALTING: 6147 hci_halting_run(); 6148 break; 6149 case HCI_STATE_FALLING_ASLEEP: 6150 hci_falling_asleep_run(); 6151 break; 6152 default: 6153 break; 6154 } 6155 6156 // allow to run after initialization to working transition 6157 if (hci_stack->state != HCI_STATE_WORKING){ 6158 return; 6159 } 6160 6161 bool done; 6162 6163 // send continuation fragments first, as they block the prepared packet buffer 6164 done = hci_run_acl_fragments(); 6165 if (done) return; 6166 6167 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6168 done = hci_run_iso_fragments(); 6169 if (done) return; 6170 #endif 6171 6172 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6173 // send host num completed packets next as they don't require num_cmd_packets > 0 6174 if (!hci_can_send_comand_packet_transport()) return; 6175 if (hci_stack->host_completed_packets){ 6176 hci_host_num_completed_packets(); 6177 return; 6178 } 6179 #endif 6180 6181 if (!hci_can_send_command_packet_now()) return; 6182 6183 // global/non-connection oriented commands 6184 6185 6186 #ifdef ENABLE_CLASSIC 6187 // general gap classic 6188 done = hci_run_general_gap_classic(); 6189 if (done) return; 6190 #endif 6191 6192 #ifdef ENABLE_BLE 6193 // general gap le 6194 done = hci_run_general_gap_le(); 6195 if (done) return; 6196 #endif 6197 6198 // send pending HCI commands 6199 hci_run_general_pending_commands(); 6200 } 6201 6202 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 6203 // house-keeping 6204 6205 #ifdef ENABLE_CLASSIC 6206 bd_addr_t addr; 6207 hci_connection_t * conn; 6208 #endif 6209 #ifdef ENABLE_LE_CENTRAL 6210 uint8_t initiator_filter_policy; 6211 #endif 6212 6213 uint16_t opcode = little_endian_read_16(packet, 0); 6214 switch (opcode) { 6215 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 6216 hci_stack->loopback_mode = packet[3]; 6217 break; 6218 6219 #ifdef ENABLE_CLASSIC 6220 case HCI_OPCODE_HCI_CREATE_CONNECTION: 6221 reverse_bd_addr(&packet[3], addr); 6222 log_info("Create_connection to %s", bd_addr_to_str(addr)); 6223 6224 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 6225 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 6226 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 6227 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 6228 } 6229 6230 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6231 if (!conn) { 6232 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6233 if (!conn) { 6234 // notify client that alloc failed 6235 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6236 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 6237 } 6238 conn->state = SEND_CREATE_CONNECTION; 6239 conn->role = HCI_ROLE_MASTER; 6240 } 6241 6242 log_info("conn state %u", conn->state); 6243 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 6244 switch (conn->state) { 6245 // if connection active exists 6246 case OPEN: 6247 // and OPEN, emit connection complete command 6248 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 6249 // packet not sent to controller 6250 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6251 case RECEIVED_DISCONNECTION_COMPLETE: 6252 // create connection triggered in disconnect complete event, let's do it now 6253 break; 6254 case SEND_CREATE_CONNECTION: 6255 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 6256 if (hci_classic_operation_active()){ 6257 return ERROR_CODE_SUCCESS; 6258 } 6259 #endif 6260 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 6261 break; 6262 default: 6263 // otherwise, just ignore as it is already in the open process 6264 // packet not sent to controller 6265 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6266 } 6267 conn->state = SENT_CREATE_CONNECTION; 6268 6269 // track outgoing connection 6270 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 6271 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 6272 break; 6273 6274 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 6275 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 6276 // setup_synchronous_connection? Voice setting at offset 22 6277 // TODO: compare to current setting if sco connection already active 6278 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 6279 break; 6280 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 6281 // accept_synchronous_connection? Voice setting at offset 18 6282 // TODO: compare to current setting if sco connection already active 6283 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 6284 // track outgoing connection 6285 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 6286 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 6287 break; 6288 #endif 6289 #endif 6290 6291 #ifdef ENABLE_BLE 6292 #ifdef ENABLE_LE_CENTRAL 6293 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6294 // white list used? 6295 initiator_filter_policy = packet[7]; 6296 switch (initiator_filter_policy) { 6297 case 0: 6298 // whitelist not used 6299 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6300 break; 6301 case 1: 6302 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6303 break; 6304 default: 6305 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6306 break; 6307 } 6308 // track outgoing connection 6309 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6310 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6311 break; 6312 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6313 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6314 break; 6315 #endif 6316 #endif 6317 default: 6318 break; 6319 } 6320 6321 hci_stack->num_cmd_packets--; 6322 6323 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6324 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6325 if (err != 0){ 6326 return ERROR_CODE_HARDWARE_FAILURE; 6327 } 6328 return ERROR_CODE_SUCCESS; 6329 } 6330 6331 // disconnect because of security block 6332 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6333 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6334 if (!connection) return; 6335 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6336 } 6337 6338 6339 // Configure Secure Simple Pairing 6340 6341 #ifdef ENABLE_CLASSIC 6342 6343 // enable will enable SSP during init 6344 void gap_ssp_set_enable(int enable){ 6345 hci_stack->ssp_enable = enable; 6346 } 6347 6348 static int hci_local_ssp_activated(void){ 6349 return gap_ssp_supported() && hci_stack->ssp_enable; 6350 } 6351 6352 // if set, BTstack will respond to io capability request using authentication requirement 6353 void gap_ssp_set_io_capability(int io_capability){ 6354 hci_stack->ssp_io_capability = io_capability; 6355 } 6356 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6357 hci_stack->ssp_authentication_requirement = authentication_requirement; 6358 } 6359 6360 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6361 void gap_ssp_set_auto_accept(int auto_accept){ 6362 hci_stack->ssp_auto_accept = auto_accept; 6363 } 6364 6365 void gap_secure_connections_enable(bool enable){ 6366 hci_stack->secure_connections_enable = enable; 6367 } 6368 bool gap_secure_connections_active(void){ 6369 return hci_stack->secure_connections_active; 6370 } 6371 6372 #endif 6373 6374 // va_list part of hci_send_cmd 6375 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6376 if (!hci_can_send_command_packet_now()){ 6377 log_error("hci_send_cmd called but cannot send packet now"); 6378 return ERROR_CODE_COMMAND_DISALLOWED; 6379 } 6380 6381 // for HCI INITIALIZATION 6382 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6383 hci_stack->last_cmd_opcode = cmd->opcode; 6384 6385 hci_reserve_packet_buffer(); 6386 uint8_t * packet = hci_stack->hci_packet_buffer; 6387 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6388 uint8_t status = hci_send_cmd_packet(packet, size); 6389 6390 // release packet buffer on error or for synchronous transport implementations 6391 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6392 hci_release_packet_buffer(); 6393 hci_emit_transport_packet_sent(); 6394 } 6395 6396 return status; 6397 } 6398 6399 /** 6400 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6401 */ 6402 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6403 va_list argptr; 6404 va_start(argptr, cmd); 6405 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6406 va_end(argptr); 6407 return status; 6408 } 6409 6410 // Create various non-HCI events. 6411 // TODO: generalize, use table similar to hci_create_command 6412 6413 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6414 // dump packet 6415 if (dump) { 6416 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 6417 } 6418 6419 // dispatch to all event handlers 6420 btstack_linked_list_iterator_t it; 6421 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6422 while (btstack_linked_list_iterator_has_next(&it)){ 6423 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6424 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6425 } 6426 } 6427 6428 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6429 if (!hci_stack->acl_packet_handler) return; 6430 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6431 } 6432 6433 #ifdef ENABLE_CLASSIC 6434 static void hci_notify_if_sco_can_send_now(void){ 6435 // notify SCO sender if waiting 6436 if (!hci_stack->sco_waiting_for_can_send_now) return; 6437 if (hci_can_send_sco_packet_now()){ 6438 hci_stack->sco_waiting_for_can_send_now = 0; 6439 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6440 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6441 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6442 } 6443 } 6444 6445 // parsing end emitting has been merged to reduce code size 6446 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6447 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6448 6449 uint8_t * eir_data; 6450 ad_context_t context; 6451 const uint8_t * name; 6452 uint8_t name_len; 6453 6454 if (size < 3) return; 6455 6456 int event_type = hci_event_packet_get_type(packet); 6457 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6458 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6459 6460 switch (event_type){ 6461 case HCI_EVENT_INQUIRY_RESULT: 6462 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6463 if (size != (3 + (num_responses * 14))) return; 6464 break; 6465 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6466 if (size != 257) return; 6467 if (num_responses != 1) return; 6468 break; 6469 default: 6470 return; 6471 } 6472 6473 // event[1] is set at the end 6474 int i; 6475 for (i=0; i<num_responses;i++){ 6476 memset(event, 0, sizeof(event)); 6477 event[0] = GAP_EVENT_INQUIRY_RESULT; 6478 uint8_t event_size = 27; // if name is not set by EIR 6479 6480 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6481 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6482 (void)memcpy(&event[9], 6483 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6484 3); // class of device 6485 (void)memcpy(&event[12], 6486 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6487 2); // clock offset 6488 6489 switch (event_type){ 6490 case HCI_EVENT_INQUIRY_RESULT: 6491 // 14,15,16,17 = 0, size 18 6492 break; 6493 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6494 event[14] = 1; 6495 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6496 // 16,17 = 0, size 18 6497 break; 6498 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6499 event[14] = 1; 6500 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6501 // EIR packets only contain a single inquiry response 6502 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6503 name = NULL; 6504 // Iterate over EIR data 6505 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6506 uint8_t data_type = ad_iterator_get_data_type(&context); 6507 uint8_t data_size = ad_iterator_get_data_len(&context); 6508 const uint8_t * data = ad_iterator_get_data(&context); 6509 // Prefer Complete Local Name over Shortened Local Name 6510 switch (data_type){ 6511 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6512 if (name) continue; 6513 /* fall through */ 6514 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6515 name = data; 6516 name_len = data_size; 6517 break; 6518 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6519 if (data_size != 8) break; 6520 event[16] = 1; 6521 memcpy(&event[17], data, 8); 6522 break; 6523 default: 6524 break; 6525 } 6526 } 6527 if (name){ 6528 event[25] = 1; 6529 // truncate name if needed 6530 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6531 event[26] = len; 6532 (void)memcpy(&event[27], name, len); 6533 event_size += len; 6534 } 6535 break; 6536 default: 6537 return; 6538 } 6539 event[1] = event_size - 2; 6540 hci_emit_event(event, event_size, 1); 6541 } 6542 } 6543 #endif 6544 6545 void hci_emit_state(void){ 6546 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6547 uint8_t event[3]; 6548 event[0] = BTSTACK_EVENT_STATE; 6549 event[1] = sizeof(event) - 2u; 6550 event[2] = hci_stack->state; 6551 hci_emit_event(event, sizeof(event), 1); 6552 } 6553 6554 #ifdef ENABLE_CLASSIC 6555 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6556 uint8_t event[13]; 6557 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6558 event[1] = sizeof(event) - 2; 6559 event[2] = status; 6560 little_endian_store_16(event, 3, con_handle); 6561 reverse_bd_addr(address, &event[5]); 6562 event[11] = 1; // ACL connection 6563 event[12] = 0; // encryption disabled 6564 hci_emit_event(event, sizeof(event), 1); 6565 } 6566 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6567 if (disable_l2cap_timeouts) return; 6568 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6569 uint8_t event[4]; 6570 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6571 event[1] = sizeof(event) - 2; 6572 little_endian_store_16(event, 2, conn->con_handle); 6573 hci_emit_event(event, sizeof(event), 1); 6574 } 6575 #endif 6576 6577 #ifdef ENABLE_BLE 6578 #ifdef ENABLE_LE_CENTRAL 6579 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){ 6580 uint8_t event[21]; 6581 event[0] = HCI_EVENT_LE_META; 6582 event[1] = sizeof(event) - 2u; 6583 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6584 event[3] = status; 6585 little_endian_store_16(event, 4, con_handle); 6586 event[6] = 0; // TODO: role 6587 event[7] = address_type; 6588 reverse_bd_addr(address, &event[8]); 6589 little_endian_store_16(event, 14, 0); // interval 6590 little_endian_store_16(event, 16, 0); // latency 6591 little_endian_store_16(event, 18, 0); // supervision timeout 6592 event[20] = 0; // master clock accuracy 6593 hci_emit_event(event, sizeof(event), 1); 6594 } 6595 #endif 6596 #endif 6597 6598 static void hci_emit_transport_packet_sent(void){ 6599 // notify upper stack that it might be possible to send again 6600 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6601 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6602 } 6603 6604 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6605 uint8_t event[6]; 6606 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6607 event[1] = sizeof(event) - 2u; 6608 event[2] = 0; // status = OK 6609 little_endian_store_16(event, 3, con_handle); 6610 event[5] = reason; 6611 hci_emit_event(event, sizeof(event), 1); 6612 } 6613 6614 static void hci_emit_nr_connections_changed(void){ 6615 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6616 uint8_t event[3]; 6617 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6618 event[1] = sizeof(event) - 2u; 6619 event[2] = nr_hci_connections(); 6620 hci_emit_event(event, sizeof(event), 1); 6621 } 6622 6623 static void hci_emit_hci_open_failed(void){ 6624 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6625 uint8_t event[2]; 6626 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6627 event[1] = sizeof(event) - 2u; 6628 hci_emit_event(event, sizeof(event), 1); 6629 } 6630 6631 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6632 log_info("hci_emit_dedicated_bonding_result %u ", status); 6633 uint8_t event[9]; 6634 int pos = 0; 6635 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6636 event[pos++] = sizeof(event) - 2u; 6637 event[pos++] = status; 6638 reverse_bd_addr(address, &event[pos]); 6639 hci_emit_event(event, sizeof(event), 1); 6640 } 6641 6642 6643 #ifdef ENABLE_CLASSIC 6644 6645 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6646 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6647 uint8_t event[5]; 6648 int pos = 0; 6649 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6650 event[pos++] = sizeof(event) - 2; 6651 little_endian_store_16(event, 2, con_handle); 6652 pos += 2; 6653 event[pos++] = level; 6654 hci_emit_event(event, sizeof(event), 1); 6655 } 6656 6657 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6658 if (!connection) return LEVEL_0; 6659 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6660 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6661 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6662 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6663 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6664 // LEVEL 4 always requires 128 bit encrytion key size 6665 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6666 security_level = LEVEL_3; 6667 } 6668 return security_level; 6669 } 6670 6671 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6672 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6673 uint8_t event[3]; 6674 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6675 event[1] = sizeof(event) - 2; 6676 event[2] = enabled; 6677 hci_emit_event(event, sizeof(event), 1); 6678 } 6679 6680 // query if remote side supports eSCO 6681 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6682 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6683 if (!connection) return false; 6684 return (connection->remote_supported_features[0] & 1) != 0; 6685 } 6686 6687 static bool hci_ssp_supported(hci_connection_t * connection){ 6688 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6689 return (connection->bonding_flags & mask) == mask; 6690 } 6691 6692 // query if remote side supports SSP 6693 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6694 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6695 if (!connection) return false; 6696 return hci_ssp_supported(connection) ? 1 : 0; 6697 } 6698 6699 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6700 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6701 } 6702 6703 /** 6704 * Check if remote supported features query has completed 6705 */ 6706 bool hci_remote_features_available(hci_con_handle_t handle){ 6707 hci_connection_t * connection = hci_connection_for_handle(handle); 6708 if (!connection) return false; 6709 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6710 } 6711 6712 /** 6713 * Trigger remote supported features query 6714 */ 6715 6716 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6717 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6718 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6719 } 6720 } 6721 6722 void hci_remote_features_query(hci_con_handle_t con_handle){ 6723 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6724 if (!connection) return; 6725 hci_trigger_remote_features_for_connection(connection); 6726 hci_run(); 6727 } 6728 6729 // GAP API 6730 /** 6731 * @bbrief enable/disable bonding. default is enabled 6732 * @praram enabled 6733 */ 6734 void gap_set_bondable_mode(int enable){ 6735 hci_stack->bondable = enable ? 1 : 0; 6736 } 6737 /** 6738 * @brief Get bondable mode. 6739 * @return 1 if bondable 6740 */ 6741 int gap_get_bondable_mode(void){ 6742 return hci_stack->bondable; 6743 } 6744 6745 /** 6746 * @brief map link keys to security levels 6747 */ 6748 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6749 switch (link_key_type){ 6750 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6751 return LEVEL_4; 6752 case COMBINATION_KEY: 6753 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6754 return LEVEL_3; 6755 default: 6756 return LEVEL_2; 6757 } 6758 } 6759 6760 /** 6761 * @brief map link keys to secure connection yes/no 6762 */ 6763 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6764 switch (link_key_type){ 6765 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6766 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6767 return true; 6768 default: 6769 return false; 6770 } 6771 } 6772 6773 /** 6774 * @brief map link keys to authenticated 6775 */ 6776 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6777 switch (link_key_type){ 6778 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6779 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6780 return true; 6781 default: 6782 return false; 6783 } 6784 } 6785 6786 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6787 log_info("gap_mitm_protection_required_for_security_level %u", level); 6788 return level > LEVEL_2; 6789 } 6790 6791 /** 6792 * @brief get current security level 6793 */ 6794 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6795 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6796 if (!connection) return LEVEL_0; 6797 return gap_security_level_for_connection(connection); 6798 } 6799 6800 /** 6801 * @brief request connection to device to 6802 * @result GAP_AUTHENTICATION_RESULT 6803 */ 6804 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6805 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6806 if (!connection){ 6807 hci_emit_security_level(con_handle, LEVEL_0); 6808 return; 6809 } 6810 6811 btstack_assert(hci_is_le_connection(connection) == false); 6812 6813 // 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) 6814 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6815 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6816 requested_level = LEVEL_4; 6817 } 6818 6819 gap_security_level_t current_level = gap_security_level(con_handle); 6820 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6821 requested_level, connection->requested_security_level, current_level); 6822 6823 // authentication active if authentication request was sent or planned level > 0 6824 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6825 if (authentication_active){ 6826 // authentication already active 6827 if (connection->requested_security_level < requested_level){ 6828 // increase requested level as new level is higher 6829 // TODO: handle re-authentication when done 6830 connection->requested_security_level = requested_level; 6831 } 6832 } else { 6833 // no request active, notify if security sufficient 6834 if (requested_level <= current_level){ 6835 hci_emit_security_level(con_handle, current_level); 6836 return; 6837 } 6838 6839 // store request 6840 connection->requested_security_level = requested_level; 6841 6842 // request remote features if not already active 6843 hci_remote_features_query(con_handle); 6844 6845 // start to authenticate connection 6846 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6847 hci_run(); 6848 } 6849 } 6850 6851 /** 6852 * @brief start dedicated bonding with device. disconnect after bonding 6853 * @param device 6854 * @param request MITM protection 6855 * @result GAP_DEDICATED_BONDING_COMPLETE 6856 */ 6857 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6858 6859 // create connection state machine 6860 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6861 6862 if (!connection){ 6863 return BTSTACK_MEMORY_ALLOC_FAILED; 6864 } 6865 6866 // delete linkn key 6867 gap_drop_link_key_for_bd_addr(device); 6868 6869 // configure LEVEL_2/3, dedicated bonding 6870 connection->state = SEND_CREATE_CONNECTION; 6871 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6872 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6873 connection->bonding_flags = BONDING_DEDICATED; 6874 6875 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6876 6877 // handle: connnection failure (connection complete != ok) 6878 // handle: authentication failure 6879 // handle: disconnect on done 6880 6881 hci_run(); 6882 6883 return 0; 6884 } 6885 6886 void gap_set_local_name(const char * local_name){ 6887 hci_stack->local_name = local_name; 6888 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6889 // also update EIR if not set by user 6890 if (hci_stack->eir_data == NULL){ 6891 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6892 } 6893 hci_run(); 6894 } 6895 #endif 6896 6897 6898 #ifdef ENABLE_BLE 6899 6900 #ifdef ENABLE_LE_CENTRAL 6901 void gap_start_scan(void){ 6902 hci_stack->le_scanning_enabled = true; 6903 hci_run(); 6904 } 6905 6906 void gap_stop_scan(void){ 6907 hci_stack->le_scanning_enabled = false; 6908 hci_run(); 6909 } 6910 6911 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6912 hci_stack->le_scan_type = scan_type; 6913 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6914 hci_stack->le_scan_interval = scan_interval; 6915 hci_stack->le_scan_window = scan_window; 6916 hci_stack->le_scanning_param_update = true; 6917 hci_run(); 6918 } 6919 6920 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6921 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6922 } 6923 6924 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6925 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6926 if (!conn){ 6927 // disallow if le connection is already outgoing 6928 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6929 log_error("le connection already active"); 6930 return ERROR_CODE_COMMAND_DISALLOWED; 6931 } 6932 6933 log_info("gap_connect: no connection exists yet, creating context"); 6934 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6935 if (!conn){ 6936 // notify client that alloc failed 6937 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6938 log_info("gap_connect: failed to alloc hci_connection_t"); 6939 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6940 } 6941 6942 // set le connecting state 6943 if (hci_is_le_connection_type(addr_type)){ 6944 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6945 } 6946 6947 conn->state = SEND_CREATE_CONNECTION; 6948 log_info("gap_connect: send create connection next"); 6949 hci_run(); 6950 return ERROR_CODE_SUCCESS; 6951 } 6952 6953 if (!hci_is_le_connection(conn) || 6954 (conn->state == SEND_CREATE_CONNECTION) || 6955 (conn->state == SENT_CREATE_CONNECTION)) { 6956 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6957 log_error("gap_connect: classic connection or connect is already being created"); 6958 return GATT_CLIENT_IN_WRONG_STATE; 6959 } 6960 6961 // check if connection was just disconnected 6962 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6963 log_info("gap_connect: send create connection (again)"); 6964 conn->state = SEND_CREATE_CONNECTION; 6965 hci_run(); 6966 return ERROR_CODE_SUCCESS; 6967 } 6968 6969 log_info("gap_connect: context exists with state %u", conn->state); 6970 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6971 hci_run(); 6972 return ERROR_CODE_SUCCESS; 6973 } 6974 6975 // @assumption: only a single outgoing LE Connection exists 6976 static hci_connection_t * gap_get_outgoing_connection(void){ 6977 btstack_linked_item_t *it; 6978 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6979 hci_connection_t * conn = (hci_connection_t *) it; 6980 if (!hci_is_le_connection(conn)) continue; 6981 switch (conn->state){ 6982 case SEND_CREATE_CONNECTION: 6983 case SENT_CREATE_CONNECTION: 6984 case SENT_CANCEL_CONNECTION: 6985 return conn; 6986 default: 6987 break; 6988 }; 6989 } 6990 return NULL; 6991 } 6992 6993 uint8_t gap_connect_cancel(void){ 6994 hci_connection_t * conn = gap_get_outgoing_connection(); 6995 if (!conn) return 0; 6996 switch (conn->state){ 6997 case SEND_CREATE_CONNECTION: 6998 // skip sending create connection and emit event instead 6999 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7000 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7001 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7002 btstack_memory_hci_connection_free( conn ); 7003 break; 7004 case SENT_CREATE_CONNECTION: 7005 // request to send cancel connection 7006 conn->state = SEND_CANCEL_CONNECTION; 7007 hci_run(); 7008 break; 7009 default: 7010 break; 7011 } 7012 return 0; 7013 } 7014 7015 /** 7016 * @brief Set connection parameters for outgoing connections 7017 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7018 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7019 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7020 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7021 * @param conn_latency, default: 4 7022 * @param supervision_timeout (unit: 10ms), default: 720 ms 7023 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7024 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7025 */ 7026 7027 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7028 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7029 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7030 hci_stack->le_connection_scan_interval = conn_scan_interval; 7031 hci_stack->le_connection_scan_window = conn_scan_window; 7032 hci_stack->le_connection_interval_min = conn_interval_min; 7033 hci_stack->le_connection_interval_max = conn_interval_max; 7034 hci_stack->le_connection_latency = conn_latency; 7035 hci_stack->le_supervision_timeout = supervision_timeout; 7036 hci_stack->le_minimum_ce_length = min_ce_length; 7037 hci_stack->le_maximum_ce_length = max_ce_length; 7038 } 7039 #endif 7040 7041 /** 7042 * @brief Updates the connection parameters for a given LE connection 7043 * @param handle 7044 * @param conn_interval_min (unit: 1.25ms) 7045 * @param conn_interval_max (unit: 1.25ms) 7046 * @param conn_latency 7047 * @param supervision_timeout (unit: 10ms) 7048 * @return 0 if ok 7049 */ 7050 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7051 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7052 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7053 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7054 connection->le_conn_interval_min = conn_interval_min; 7055 connection->le_conn_interval_max = conn_interval_max; 7056 connection->le_conn_latency = conn_latency; 7057 connection->le_supervision_timeout = supervision_timeout; 7058 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7059 hci_run(); 7060 return 0; 7061 } 7062 7063 /** 7064 * @brief Request an update of the connection parameter for a given LE connection 7065 * @param handle 7066 * @param conn_interval_min (unit: 1.25ms) 7067 * @param conn_interval_max (unit: 1.25ms) 7068 * @param conn_latency 7069 * @param supervision_timeout (unit: 10ms) 7070 * @return 0 if ok 7071 */ 7072 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7073 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7074 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7075 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7076 connection->le_conn_interval_min = conn_interval_min; 7077 connection->le_conn_interval_max = conn_interval_max; 7078 connection->le_conn_latency = conn_latency; 7079 connection->le_supervision_timeout = supervision_timeout; 7080 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7081 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7082 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7083 return 0; 7084 } 7085 7086 #ifdef ENABLE_LE_PERIPHERAL 7087 7088 /** 7089 * @brief Set Advertisement Data 7090 * @param advertising_data_length 7091 * @param advertising_data (max 31 octets) 7092 * @note data is not copied, pointer has to stay valid 7093 */ 7094 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7095 hci_stack->le_advertisements_data_len = advertising_data_length; 7096 hci_stack->le_advertisements_data = advertising_data; 7097 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7098 hci_run(); 7099 } 7100 7101 /** 7102 * @brief Set Scan Response Data 7103 * @param advertising_data_length 7104 * @param advertising_data (max 31 octets) 7105 * @note data is not copied, pointer has to stay valid 7106 */ 7107 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7108 hci_stack->le_scan_response_data_len = scan_response_data_length; 7109 hci_stack->le_scan_response_data = scan_response_data; 7110 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7111 hci_run(); 7112 } 7113 7114 /** 7115 * @brief Set Advertisement Parameters 7116 * @param adv_int_min 7117 * @param adv_int_max 7118 * @param adv_type 7119 * @param direct_address_type 7120 * @param direct_address 7121 * @param channel_map 7122 * @param filter_policy 7123 * 7124 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7125 */ 7126 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7127 uint8_t direct_address_typ, bd_addr_t direct_address, 7128 uint8_t channel_map, uint8_t filter_policy) { 7129 7130 hci_stack->le_advertisements_interval_min = adv_int_min; 7131 hci_stack->le_advertisements_interval_max = adv_int_max; 7132 hci_stack->le_advertisements_type = adv_type; 7133 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7134 hci_stack->le_advertisements_channel_map = channel_map; 7135 hci_stack->le_advertisements_filter_policy = filter_policy; 7136 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7137 6); 7138 7139 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7140 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7141 hci_run(); 7142 } 7143 7144 /** 7145 * @brief Enable/Disable Advertisements 7146 * @param enabled 7147 */ 7148 void gap_advertisements_enable(int enabled){ 7149 if (enabled == 0){ 7150 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7151 } else { 7152 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 7153 } 7154 hci_update_advertisements_enabled_for_current_roles(); 7155 hci_run(); 7156 } 7157 7158 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7159 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 7160 btstack_linked_list_iterator_t it; 7161 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 7162 while (btstack_linked_list_iterator_has_next(&it)){ 7163 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 7164 if ( item->advertising_handle == advertising_handle ) { 7165 return item; 7166 } 7167 } 7168 return NULL; 7169 } 7170 7171 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 7172 // find free advertisement handle 7173 uint8_t advertisement_handle; 7174 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 7175 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 7176 } 7177 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 7178 // clear 7179 memset(storage, 0, sizeof(le_advertising_set_t)); 7180 // copy params 7181 storage->advertising_handle = advertisement_handle; 7182 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7183 // add to list 7184 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 7185 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7186 *out_advertising_handle = advertisement_handle; 7187 // set tasks and start 7188 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7189 hci_run(); 7190 return ERROR_CODE_SUCCESS; 7191 } 7192 7193 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 7194 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7195 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7196 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7197 // set tasks and start 7198 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7199 hci_run(); 7200 return ERROR_CODE_SUCCESS; 7201 } 7202 7203 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 7204 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7205 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7206 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 7207 return ERROR_CODE_SUCCESS; 7208 } 7209 7210 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 7211 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7212 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7213 memcpy(advertising_set->random_address, random_address, 6); 7214 // set tasks and start 7215 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7216 hci_run(); 7217 return ERROR_CODE_SUCCESS; 7218 } 7219 7220 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 7221 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7222 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7223 advertising_set->adv_data = advertising_data; 7224 advertising_set->adv_data_len = advertising_data_length; 7225 // set tasks and start 7226 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7227 hci_run(); 7228 return ERROR_CODE_SUCCESS; 7229 } 7230 7231 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){ 7232 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7233 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7234 advertising_set->scan_data = scan_response_data; 7235 advertising_set->scan_data_len = scan_response_data_length; 7236 // set tasks and start 7237 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7238 hci_run(); 7239 return ERROR_CODE_SUCCESS; 7240 } 7241 7242 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 7243 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7244 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7245 advertising_set->enable_timeout = timeout; 7246 advertising_set->enable_max_scan_events = num_extended_advertising_events; 7247 // set tasks and start 7248 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 7249 hci_run(); 7250 return ERROR_CODE_SUCCESS; 7251 } 7252 7253 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 7254 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7255 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7256 // set tasks and start 7257 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7258 hci_run(); 7259 return ERROR_CODE_SUCCESS; 7260 } 7261 7262 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7263 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7264 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7265 // set tasks and start 7266 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7267 hci_run(); 7268 return ERROR_CODE_SUCCESS; 7269 } 7270 7271 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7272 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 7273 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7274 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7275 // periodic advertising requires neither connectable, scannable, legacy or anonymous 7276 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7277 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 7278 // set tasks and start 7279 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 7280 hci_run(); 7281 return ERROR_CODE_SUCCESS; 7282 } 7283 7284 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 7285 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7286 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7287 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 7288 return ERROR_CODE_SUCCESS; 7289 } 7290 7291 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 7292 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7293 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7294 advertising_set->periodic_data = periodic_data; 7295 advertising_set->periodic_data_len = periodic_data_length; 7296 // set tasks and start 7297 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 7298 hci_run(); 7299 return ERROR_CODE_SUCCESS; 7300 } 7301 7302 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7303 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7304 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7305 // set tasks and start 7306 advertising_set->periodic_include_adi = include_adi; 7307 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7308 hci_run(); 7309 return ERROR_CODE_SUCCESS; 7310 } 7311 7312 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7313 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7314 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7315 // set tasks and start 7316 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7317 hci_run(); 7318 return ERROR_CODE_SUCCESS; 7319 } 7320 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 7321 7322 #endif 7323 7324 #endif 7325 7326 void hci_le_set_own_address_type(uint8_t own_address_type){ 7327 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7328 if (own_address_type == hci_stack->le_own_addr_type) return; 7329 hci_stack->le_own_addr_type = own_address_type; 7330 7331 #ifdef ENABLE_LE_PERIPHERAL 7332 // update advertisement parameters, too 7333 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7334 hci_run(); 7335 #endif 7336 #ifdef ENABLE_LE_CENTRAL 7337 // note: we don't update scan parameters or modify ongoing connection attempts 7338 #endif 7339 } 7340 7341 void hci_le_random_address_set(const bd_addr_t random_address){ 7342 memcpy(hci_stack->le_random_address, random_address, 6); 7343 hci_stack->le_random_address_set = true; 7344 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7345 hci_run(); 7346 } 7347 7348 #endif 7349 7350 uint8_t gap_disconnect(hci_con_handle_t handle){ 7351 hci_connection_t * conn = hci_connection_for_handle(handle); 7352 if (!conn){ 7353 hci_emit_disconnection_complete(handle, 0); 7354 return 0; 7355 } 7356 // ignore if already disconnected 7357 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7358 return 0; 7359 } 7360 conn->state = SEND_DISCONNECT; 7361 hci_run(); 7362 return 0; 7363 } 7364 7365 int gap_read_rssi(hci_con_handle_t con_handle){ 7366 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7367 if (hci_connection == NULL) return 0; 7368 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7369 hci_run(); 7370 return 1; 7371 } 7372 7373 /** 7374 * @brief Get connection type 7375 * @param con_handle 7376 * @result connection_type 7377 */ 7378 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7379 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7380 if (!conn) return GAP_CONNECTION_INVALID; 7381 switch (conn->address_type){ 7382 case BD_ADDR_TYPE_LE_PUBLIC: 7383 case BD_ADDR_TYPE_LE_RANDOM: 7384 return GAP_CONNECTION_LE; 7385 case BD_ADDR_TYPE_SCO: 7386 return GAP_CONNECTION_SCO; 7387 case BD_ADDR_TYPE_ACL: 7388 return GAP_CONNECTION_ACL; 7389 default: 7390 return GAP_CONNECTION_INVALID; 7391 } 7392 } 7393 7394 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7395 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7396 if (!conn) return HCI_ROLE_INVALID; 7397 return (hci_role_t) conn->role; 7398 } 7399 7400 7401 #ifdef ENABLE_CLASSIC 7402 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7403 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7404 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7405 conn->request_role = role; 7406 hci_run(); 7407 return ERROR_CODE_SUCCESS; 7408 } 7409 #endif 7410 7411 #ifdef ENABLE_BLE 7412 7413 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){ 7414 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7415 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7416 7417 conn->le_phy_update_all_phys = all_phys; 7418 conn->le_phy_update_tx_phys = tx_phys; 7419 conn->le_phy_update_rx_phys = rx_phys; 7420 conn->le_phy_update_phy_options = phy_options; 7421 7422 hci_run(); 7423 7424 return 0; 7425 } 7426 7427 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7428 // check if already in list 7429 btstack_linked_list_iterator_t it; 7430 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7431 while (btstack_linked_list_iterator_has_next(&it)) { 7432 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7433 if (entry->address_type != address_type) { 7434 continue; 7435 } 7436 if (memcmp(entry->address, address, 6) != 0) { 7437 continue; 7438 } 7439 // disallow if already scheduled to add 7440 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7441 return ERROR_CODE_COMMAND_DISALLOWED; 7442 } 7443 // still on controller, but scheduled to remove -> re-add 7444 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7445 return ERROR_CODE_SUCCESS; 7446 } 7447 // alloc and add to list 7448 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7449 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7450 entry->address_type = address_type; 7451 (void)memcpy(entry->address, address, 6); 7452 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7453 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7454 return ERROR_CODE_SUCCESS; 7455 } 7456 7457 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7458 btstack_linked_list_iterator_t it; 7459 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7460 while (btstack_linked_list_iterator_has_next(&it)){ 7461 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7462 if (entry->address_type != address_type) { 7463 continue; 7464 } 7465 if (memcmp(entry->address, address, 6) != 0) { 7466 continue; 7467 } 7468 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7469 // remove from controller if already present 7470 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7471 } else { 7472 // directly remove entry from whitelist 7473 btstack_linked_list_iterator_remove(&it); 7474 btstack_memory_whitelist_entry_free(entry); 7475 } 7476 return ERROR_CODE_SUCCESS; 7477 } 7478 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7479 } 7480 7481 static void hci_whitelist_clear(void){ 7482 btstack_linked_list_iterator_t it; 7483 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7484 while (btstack_linked_list_iterator_has_next(&it)){ 7485 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7486 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7487 // remove from controller if already present 7488 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7489 continue; 7490 } 7491 // directly remove entry from whitelist 7492 btstack_linked_list_iterator_remove(&it); 7493 btstack_memory_whitelist_entry_free(entry); 7494 } 7495 } 7496 7497 // free all entries unconditionally 7498 static void hci_whitelist_free(void){ 7499 btstack_linked_list_iterator_t lit; 7500 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7501 while (btstack_linked_list_iterator_has_next(&lit)){ 7502 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7503 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7504 btstack_memory_whitelist_entry_free(entry); 7505 } 7506 } 7507 7508 /** 7509 * @brief Clear Whitelist 7510 * @return 0 if ok 7511 */ 7512 uint8_t gap_whitelist_clear(void){ 7513 hci_whitelist_clear(); 7514 hci_run(); 7515 return ERROR_CODE_SUCCESS; 7516 } 7517 7518 /** 7519 * @brief Add Device to Whitelist 7520 * @param address_typ 7521 * @param address 7522 * @return 0 if ok 7523 */ 7524 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7525 uint8_t status = hci_whitelist_add(address_type, address); 7526 if (status){ 7527 return status; 7528 } 7529 hci_run(); 7530 return ERROR_CODE_SUCCESS; 7531 } 7532 7533 /** 7534 * @brief Remove Device from Whitelist 7535 * @param address_typ 7536 * @param address 7537 * @return 0 if ok 7538 */ 7539 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7540 uint8_t status = hci_whitelist_remove(address_type, address); 7541 if (status){ 7542 return status; 7543 } 7544 hci_run(); 7545 return ERROR_CODE_SUCCESS; 7546 } 7547 7548 #ifdef ENABLE_LE_CENTRAL 7549 /** 7550 * @brief Connect with Whitelist 7551 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7552 * @return - if ok 7553 */ 7554 uint8_t gap_connect_with_whitelist(void){ 7555 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7556 return ERROR_CODE_COMMAND_DISALLOWED; 7557 } 7558 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7559 hci_run(); 7560 return ERROR_CODE_SUCCESS; 7561 } 7562 7563 /** 7564 * @brief Auto Connection Establishment - Start Connecting to device 7565 * @param address_typ 7566 * @param address 7567 * @return 0 if ok 7568 */ 7569 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7570 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7571 return ERROR_CODE_COMMAND_DISALLOWED; 7572 } 7573 7574 uint8_t status = hci_whitelist_add(address_type, address); 7575 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7576 return status; 7577 } 7578 7579 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7580 7581 hci_run(); 7582 return ERROR_CODE_SUCCESS; 7583 } 7584 7585 /** 7586 * @brief Auto Connection Establishment - Stop Connecting to device 7587 * @param address_typ 7588 * @param address 7589 * @return 0 if ok 7590 */ 7591 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7592 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7593 return ERROR_CODE_COMMAND_DISALLOWED; 7594 } 7595 7596 hci_whitelist_remove(address_type, address); 7597 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7598 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7599 } 7600 hci_run(); 7601 return 0; 7602 } 7603 7604 /** 7605 * @brief Auto Connection Establishment - Stop everything 7606 * @note Convenience function to stop all active auto connection attempts 7607 */ 7608 uint8_t gap_auto_connection_stop_all(void){ 7609 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7610 return ERROR_CODE_COMMAND_DISALLOWED; 7611 } 7612 hci_whitelist_clear(); 7613 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7614 hci_run(); 7615 return ERROR_CODE_SUCCESS; 7616 } 7617 7618 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7619 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7620 if (!conn) return 0; 7621 return conn->le_connection_interval; 7622 } 7623 #endif 7624 #endif 7625 7626 #ifdef ENABLE_CLASSIC 7627 /** 7628 * @brief Set Extended Inquiry Response data 7629 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7630 * @note has to be done before stack starts up 7631 */ 7632 void gap_set_extended_inquiry_response(const uint8_t * data){ 7633 hci_stack->eir_data = data; 7634 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7635 hci_run(); 7636 } 7637 7638 /** 7639 * @brief Start GAP Classic Inquiry 7640 * @param duration in 1.28s units 7641 * @return 0 if ok 7642 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7643 */ 7644 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7645 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7646 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7647 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7648 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7649 } 7650 hci_stack->inquiry_state = duration_in_1280ms_units; 7651 hci_stack->inquiry_max_period_length = 0; 7652 hci_stack->inquiry_min_period_length = 0; 7653 hci_run(); 7654 return 0; 7655 } 7656 7657 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 7658 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7659 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7660 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7661 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7662 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7663 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7664 7665 hci_stack->inquiry_state = duration; 7666 hci_stack->inquiry_max_period_length = max_period_length; 7667 hci_stack->inquiry_min_period_length = min_period_length; 7668 hci_run(); 7669 return 0; 7670 } 7671 7672 /** 7673 * @brief Stop GAP Classic Inquiry 7674 * @return 0 if ok 7675 */ 7676 int gap_inquiry_stop(void){ 7677 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7678 // emit inquiry complete event, before it even started 7679 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7680 hci_emit_event(event, sizeof(event), 1); 7681 return 0; 7682 } 7683 switch (hci_stack->inquiry_state){ 7684 case GAP_INQUIRY_STATE_ACTIVE: 7685 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7686 hci_run(); 7687 return ERROR_CODE_SUCCESS; 7688 case GAP_INQUIRY_STATE_PERIODIC: 7689 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 7690 hci_run(); 7691 return ERROR_CODE_SUCCESS; 7692 default: 7693 return ERROR_CODE_COMMAND_DISALLOWED; 7694 } 7695 } 7696 7697 void gap_inquiry_set_lap(uint32_t lap){ 7698 hci_stack->inquiry_lap = lap; 7699 } 7700 7701 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7702 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7703 hci_stack->inquiry_scan_window = inquiry_scan_window; 7704 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7705 hci_run(); 7706 } 7707 7708 7709 /** 7710 * @brief Remote Name Request 7711 * @param addr 7712 * @param page_scan_repetition_mode 7713 * @param clock_offset only used when bit 15 is set 7714 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7715 */ 7716 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7717 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7718 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7719 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7720 hci_stack->remote_name_clock_offset = clock_offset; 7721 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7722 hci_run(); 7723 return 0; 7724 } 7725 7726 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7727 hci_stack->gap_pairing_state = state; 7728 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7729 hci_run(); 7730 return 0; 7731 } 7732 7733 /** 7734 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7735 * @param addr 7736 * @param pin_data 7737 * @param pin_len 7738 * @return 0 if ok 7739 */ 7740 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7741 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7742 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7743 hci_stack->gap_pairing_pin_len = pin_len; 7744 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7745 } 7746 7747 /** 7748 * @brief Legacy Pairing Pin Code Response 7749 * @param addr 7750 * @param pin 7751 * @return 0 if ok 7752 */ 7753 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7754 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7755 } 7756 7757 /** 7758 * @brief Abort Legacy Pairing 7759 * @param addr 7760 * @param pin 7761 * @return 0 if ok 7762 */ 7763 int gap_pin_code_negative(bd_addr_t addr){ 7764 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7765 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7766 } 7767 7768 /** 7769 * @brief SSP Passkey Response 7770 * @param addr 7771 * @param passkey 7772 * @return 0 if ok 7773 */ 7774 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7775 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7776 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7777 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7778 } 7779 7780 /** 7781 * @brief Abort SSP Passkey Entry/Pairing 7782 * @param addr 7783 * @param pin 7784 * @return 0 if ok 7785 */ 7786 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7787 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7788 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7789 } 7790 7791 /** 7792 * @brief Accept SSP Numeric Comparison 7793 * @param addr 7794 * @param passkey 7795 * @return 0 if ok 7796 */ 7797 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7798 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7799 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7800 } 7801 7802 /** 7803 * @brief Abort SSP Numeric Comparison/Pairing 7804 * @param addr 7805 * @param pin 7806 * @return 0 if ok 7807 */ 7808 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7809 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7810 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7811 } 7812 7813 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7814 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7815 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7816 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7817 connectionSetAuthenticationFlags(conn, flag); 7818 hci_run(); 7819 return ERROR_CODE_SUCCESS; 7820 } 7821 #endif 7822 7823 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7824 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7825 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7826 } 7827 7828 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7829 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7830 } 7831 #endif 7832 7833 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7834 /** 7835 * @brief Report Remote OOB Data 7836 * @param bd_addr 7837 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7838 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7839 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7840 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7841 */ 7842 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){ 7843 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7844 if (connection == NULL) { 7845 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7846 } 7847 connection->classic_oob_c_192 = c_192; 7848 connection->classic_oob_r_192 = r_192; 7849 7850 // ignore P-256 if not supported by us 7851 if (hci_stack->secure_connections_active){ 7852 connection->classic_oob_c_256 = c_256; 7853 connection->classic_oob_r_256 = r_256; 7854 } 7855 7856 return ERROR_CODE_SUCCESS; 7857 } 7858 /** 7859 * @brief Generate new OOB data 7860 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7861 */ 7862 void gap_ssp_generate_oob_data(void){ 7863 hci_stack->classic_read_local_oob_data = true; 7864 hci_run(); 7865 } 7866 7867 #endif 7868 7869 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7870 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7871 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7872 if (connection == NULL) { 7873 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7874 } 7875 7876 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7877 connection->link_key_type = type; 7878 7879 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7880 } 7881 7882 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7883 /** 7884 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7885 * @param inquiry_mode see bluetooth_defines.h 7886 */ 7887 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7888 hci_stack->inquiry_mode = inquiry_mode; 7889 } 7890 7891 /** 7892 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7893 */ 7894 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7895 hci_stack->sco_voice_setting = voice_setting; 7896 } 7897 7898 /** 7899 * @brief Get SCO Voice Setting 7900 * @return current voice setting 7901 */ 7902 uint16_t hci_get_sco_voice_setting(void){ 7903 return hci_stack->sco_voice_setting; 7904 } 7905 7906 static int hci_have_usb_transport(void){ 7907 if (!hci_stack->hci_transport) return 0; 7908 const char * transport_name = hci_stack->hci_transport->name; 7909 if (!transport_name) return 0; 7910 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7911 } 7912 7913 /** @brief Get SCO packet length for current SCO Voice setting 7914 * @note Using SCO packets of the exact length is required for USB transfer 7915 * @return Length of SCO packets in bytes (not audio frames) 7916 */ 7917 uint16_t hci_get_sco_packet_length(void){ 7918 uint16_t sco_packet_length = 0; 7919 7920 #ifdef ENABLE_SCO_OVER_HCI 7921 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7922 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7923 7924 if (hci_have_usb_transport()){ 7925 // see Core Spec for H2 USB Transfer. 7926 // 3 byte SCO header + 24 bytes per connection 7927 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7928 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7929 } else { 7930 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7931 sco_packet_length = 3 + 60 * multiplier; 7932 // assert that it still fits inside an SCO buffer 7933 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7934 sco_packet_length = 3 + 60; 7935 } 7936 } 7937 #endif 7938 7939 #ifdef HAVE_SCO_TRANSPORT 7940 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7941 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7942 sco_packet_length = 3 + 60 * multiplier; 7943 #endif 7944 return sco_packet_length; 7945 } 7946 7947 /** 7948 * @brief Sets the master/slave policy 7949 * @param policy (0: attempt to become master, 1: let connecting device decide) 7950 */ 7951 void hci_set_master_slave_policy(uint8_t policy){ 7952 hci_stack->master_slave_policy = policy; 7953 } 7954 7955 #endif 7956 7957 HCI_STATE hci_get_state(void){ 7958 return hci_stack->state; 7959 } 7960 7961 #ifdef ENABLE_CLASSIC 7962 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7963 hci_stack->gap_classic_accept_callback = accept_callback; 7964 } 7965 #endif 7966 7967 /** 7968 * @brief Set callback for Bluetooth Hardware Error 7969 */ 7970 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7971 hci_stack->hardware_error_callback = fn; 7972 } 7973 7974 void hci_disconnect_all(void){ 7975 btstack_linked_list_iterator_t it; 7976 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7977 while (btstack_linked_list_iterator_has_next(&it)){ 7978 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7979 if (con->state == SENT_DISCONNECT) continue; 7980 con->state = SEND_DISCONNECT; 7981 } 7982 hci_run(); 7983 } 7984 7985 uint16_t hci_get_manufacturer(void){ 7986 return hci_stack->manufacturer; 7987 } 7988 7989 #ifdef ENABLE_BLE 7990 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7991 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7992 if (!hci_con) return NULL; 7993 return &hci_con->sm_connection; 7994 } 7995 7996 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7997 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7998 #endif 7999 8000 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8001 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8002 if (hci_connection == NULL) return 0; 8003 if (hci_is_le_connection(hci_connection)){ 8004 #ifdef ENABLE_BLE 8005 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8006 if (sm_conn->sm_connection_encrypted) { 8007 return sm_conn->sm_actual_encryption_key_size; 8008 } 8009 #endif 8010 } else { 8011 #ifdef ENABLE_CLASSIC 8012 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8013 return hci_connection->encryption_key_size; 8014 } 8015 #endif 8016 } 8017 return 0; 8018 } 8019 8020 bool gap_authenticated(hci_con_handle_t con_handle){ 8021 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8022 if (hci_connection == NULL) return false; 8023 8024 switch (hci_connection->address_type){ 8025 #ifdef ENABLE_BLE 8026 case BD_ADDR_TYPE_LE_PUBLIC: 8027 case BD_ADDR_TYPE_LE_RANDOM: 8028 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8029 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8030 #endif 8031 #ifdef ENABLE_CLASSIC 8032 case BD_ADDR_TYPE_SCO: 8033 case BD_ADDR_TYPE_ACL: 8034 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8035 #endif 8036 default: 8037 return false; 8038 } 8039 } 8040 8041 bool gap_secure_connection(hci_con_handle_t con_handle){ 8042 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8043 if (hci_connection == NULL) return 0; 8044 8045 switch (hci_connection->address_type){ 8046 #ifdef ENABLE_BLE 8047 case BD_ADDR_TYPE_LE_PUBLIC: 8048 case BD_ADDR_TYPE_LE_RANDOM: 8049 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8050 return hci_connection->sm_connection.sm_connection_sc != 0; 8051 #endif 8052 #ifdef ENABLE_CLASSIC 8053 case BD_ADDR_TYPE_SCO: 8054 case BD_ADDR_TYPE_ACL: 8055 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8056 #endif 8057 default: 8058 return false; 8059 } 8060 } 8061 8062 bool gap_bonded(hci_con_handle_t con_handle){ 8063 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8064 if (hci_connection == NULL) return 0; 8065 8066 #ifdef ENABLE_CLASSIC 8067 link_key_t link_key; 8068 link_key_type_t link_key_type; 8069 #endif 8070 switch (hci_connection->address_type){ 8071 #ifdef ENABLE_BLE 8072 case BD_ADDR_TYPE_LE_PUBLIC: 8073 case BD_ADDR_TYPE_LE_RANDOM: 8074 return hci_connection->sm_connection.sm_le_db_index >= 0; 8075 #endif 8076 #ifdef ENABLE_CLASSIC 8077 case BD_ADDR_TYPE_SCO: 8078 case BD_ADDR_TYPE_ACL: 8079 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8080 #endif 8081 default: 8082 return false; 8083 } 8084 } 8085 8086 #ifdef ENABLE_BLE 8087 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8088 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8089 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8090 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8091 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8092 return sm_conn->sm_connection_authorization_state; 8093 } 8094 #endif 8095 8096 #ifdef ENABLE_CLASSIC 8097 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){ 8098 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8099 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8100 conn->sniff_min_interval = sniff_min_interval; 8101 conn->sniff_max_interval = sniff_max_interval; 8102 conn->sniff_attempt = sniff_attempt; 8103 conn->sniff_timeout = sniff_timeout; 8104 hci_run(); 8105 return 0; 8106 } 8107 8108 /** 8109 * @brief Exit Sniff mode 8110 * @param con_handle 8111 @ @return 0 if ok 8112 */ 8113 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8114 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8115 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8116 conn->sniff_min_interval = 0xffff; 8117 hci_run(); 8118 return 0; 8119 } 8120 8121 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){ 8122 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8123 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8124 conn->sniff_subrating_max_latency = max_latency; 8125 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8126 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8127 hci_run(); 8128 return ERROR_CODE_SUCCESS; 8129 } 8130 8131 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){ 8132 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8133 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8134 conn->qos_service_type = service_type; 8135 conn->qos_token_rate = token_rate; 8136 conn->qos_peak_bandwidth = peak_bandwidth; 8137 conn->qos_latency = latency; 8138 conn->qos_delay_variation = delay_variation; 8139 hci_run(); 8140 return ERROR_CODE_SUCCESS; 8141 } 8142 8143 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 8144 hci_stack->new_page_scan_interval = page_scan_interval; 8145 hci_stack->new_page_scan_window = page_scan_window; 8146 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 8147 hci_run(); 8148 } 8149 8150 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 8151 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 8152 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 8153 hci_run(); 8154 } 8155 8156 void gap_set_page_timeout(uint16_t page_timeout){ 8157 hci_stack->page_timeout = page_timeout; 8158 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 8159 hci_run(); 8160 } 8161 8162 #endif 8163 8164 void hci_halting_defer(void){ 8165 if (hci_stack->state != HCI_STATE_HALTING) return; 8166 switch (hci_stack->substate){ 8167 case HCI_HALTING_READY_FOR_CLOSE: 8168 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 8169 break; 8170 default: 8171 break; 8172 } 8173 } 8174 8175 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 8176 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 8177 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8178 if (le_device_db_index >= le_device_db_max_count()) return; 8179 uint8_t offset = le_device_db_index >> 3; 8180 uint8_t mask = 1 << (le_device_db_index & 7); 8181 hci_stack->le_resolving_list_add_entries[offset] |= mask; 8182 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8183 // note: go back to remove entries, otherwise, a remove + add will skip the add 8184 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8185 } 8186 } 8187 8188 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 8189 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8190 if (le_device_db_index >= le_device_db_max_count()) return; 8191 uint8_t offset = le_device_db_index >> 3; 8192 uint8_t mask = 1 << (le_device_db_index & 7); 8193 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 8194 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8195 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8196 } 8197 } 8198 8199 uint8_t gap_load_resolving_list_from_le_device_db(void){ 8200 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 8201 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 8202 } 8203 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 8204 // restart le resolving list update 8205 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 8206 } 8207 return ERROR_CODE_SUCCESS; 8208 } 8209 #endif 8210 8211 #ifdef ENABLE_BLE 8212 #ifdef ENABLE_LE_CENTRAL 8213 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8214 8215 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8216 // check if already in list 8217 btstack_linked_list_iterator_t it; 8218 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8219 while (btstack_linked_list_iterator_has_next(&it)) { 8220 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 8221 if (entry->sid != advertising_sid) { 8222 continue; 8223 } 8224 if (entry->address_type != address_type) { 8225 continue; 8226 } 8227 if (memcmp(entry->address, address, 6) != 0) { 8228 continue; 8229 } 8230 // disallow if already scheduled to add 8231 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 8232 return ERROR_CODE_COMMAND_DISALLOWED; 8233 } 8234 // still on controller, but scheduled to remove -> re-add 8235 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8236 return ERROR_CODE_SUCCESS; 8237 } 8238 // alloc and add to list 8239 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 8240 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8241 entry->sid = advertising_sid; 8242 entry->address_type = address_type; 8243 (void)memcpy(entry->address, address, 6); 8244 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8245 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 8246 return ERROR_CODE_SUCCESS; 8247 } 8248 8249 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8250 btstack_linked_list_iterator_t it; 8251 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8252 while (btstack_linked_list_iterator_has_next(&it)){ 8253 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8254 if (entry->sid != advertising_sid) { 8255 continue; 8256 } 8257 if (entry->address_type != address_type) { 8258 continue; 8259 } 8260 if (memcmp(entry->address, address, 6) != 0) { 8261 continue; 8262 } 8263 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8264 // remove from controller if already present 8265 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8266 } else { 8267 // directly remove entry from whitelist 8268 btstack_linked_list_iterator_remove(&it); 8269 btstack_memory_periodic_advertiser_list_entry_free(entry); 8270 } 8271 return ERROR_CODE_SUCCESS; 8272 } 8273 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8274 } 8275 8276 static void hci_periodic_advertiser_list_clear(void){ 8277 btstack_linked_list_iterator_t it; 8278 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8279 while (btstack_linked_list_iterator_has_next(&it)){ 8280 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8281 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8282 // remove from controller if already present 8283 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8284 continue; 8285 } 8286 // directly remove entry from whitelist 8287 btstack_linked_list_iterator_remove(&it); 8288 btstack_memory_periodic_advertiser_list_entry_free(entry); 8289 } 8290 } 8291 8292 // free all entries unconditionally 8293 static void hci_periodic_advertiser_list_free(void){ 8294 btstack_linked_list_iterator_t lit; 8295 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 8296 while (btstack_linked_list_iterator_has_next(&lit)){ 8297 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 8298 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 8299 btstack_memory_periodic_advertiser_list_entry_free(entry); 8300 } 8301 } 8302 8303 uint8_t gap_periodic_advertiser_list_clear(void){ 8304 hci_periodic_advertiser_list_clear(); 8305 hci_run(); 8306 return ERROR_CODE_SUCCESS; 8307 } 8308 8309 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8310 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 8311 if (status){ 8312 return status; 8313 } 8314 hci_run(); 8315 return ERROR_CODE_SUCCESS; 8316 } 8317 8318 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8319 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 8320 if (status){ 8321 return status; 8322 } 8323 hci_run(); 8324 return ERROR_CODE_SUCCESS; 8325 } 8326 8327 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 8328 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 8329 // abort if already active 8330 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 8331 return ERROR_CODE_COMMAND_DISALLOWED; 8332 } 8333 // store request 8334 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 8335 hci_stack->le_periodic_sync_options = options; 8336 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 8337 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 8338 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 8339 hci_stack->le_periodic_sync_skip = skip; 8340 hci_stack->le_periodic_sync_timeout = sync_timeout; 8341 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 8342 8343 hci_run(); 8344 return ERROR_CODE_SUCCESS; 8345 } 8346 8347 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 8348 // abort if not requested 8349 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 8350 return ERROR_CODE_COMMAND_DISALLOWED; 8351 } 8352 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 8353 hci_run(); 8354 return ERROR_CODE_SUCCESS; 8355 } 8356 8357 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 8358 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 8359 return ERROR_CODE_COMMAND_DISALLOWED; 8360 } 8361 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 8362 hci_run(); 8363 return ERROR_CODE_SUCCESS; 8364 } 8365 8366 #endif 8367 #endif 8368 #endif 8369 8370 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 8371 void hci_setup_test_connections_fuzz(void){ 8372 hci_connection_t * conn; 8373 8374 // default address: 66:55:44:33:00:01 8375 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 8376 8377 // setup Controller info 8378 hci_stack->num_cmd_packets = 255; 8379 hci_stack->acl_packets_total_num = 255; 8380 8381 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 8382 addr[5] = 0x01; 8383 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8384 conn->con_handle = addr[5]; 8385 conn->role = HCI_ROLE_SLAVE; 8386 conn->state = RECEIVED_CONNECTION_REQUEST; 8387 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8388 8389 // setup incoming Classic SCO connection with con handle 0x0002 8390 addr[5] = 0x02; 8391 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8392 conn->con_handle = addr[5]; 8393 conn->role = HCI_ROLE_SLAVE; 8394 conn->state = RECEIVED_CONNECTION_REQUEST; 8395 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8396 8397 // setup ready Classic ACL connection with con handle 0x0003 8398 addr[5] = 0x03; 8399 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8400 conn->con_handle = addr[5]; 8401 conn->role = HCI_ROLE_SLAVE; 8402 conn->state = OPEN; 8403 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8404 8405 // setup ready Classic SCO connection with con handle 0x0004 8406 addr[5] = 0x04; 8407 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8408 conn->con_handle = addr[5]; 8409 conn->role = HCI_ROLE_SLAVE; 8410 conn->state = OPEN; 8411 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8412 8413 // setup ready LE ACL connection with con handle 0x005 and public address 8414 addr[5] = 0x05; 8415 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 8416 conn->con_handle = addr[5]; 8417 conn->role = HCI_ROLE_SLAVE; 8418 conn->state = OPEN; 8419 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8420 conn->sm_connection.sm_connection_encrypted = 1; 8421 } 8422 8423 void hci_free_connections_fuzz(void){ 8424 btstack_linked_list_iterator_t it; 8425 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8426 while (btstack_linked_list_iterator_has_next(&it)){ 8427 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8428 btstack_linked_list_iterator_remove(&it); 8429 btstack_memory_hci_connection_free(con); 8430 } 8431 } 8432 void hci_simulate_working_fuzz(void){ 8433 hci_stack->le_scanning_param_update = false; 8434 hci_init_done(); 8435 hci_stack->num_cmd_packets = 255; 8436 } 8437 #endif 8438