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 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 227 static uint8_t hci_iso_stream_create(hci_con_handle_t cis_handle); 228 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream); 229 static hci_iso_stream_t * hci_iso_stream_for_cis_handle(hci_con_handle_t cis_handle); 230 static void hci_iso_stream_requested_finalize(void); 231 static void hci_iso_stream_requested_confirm(void); 232 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size); 233 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 234 #endif /* ENABLE_BLE */ 235 236 // the STACK is here 237 #ifndef HAVE_MALLOC 238 static hci_stack_t hci_stack_static; 239 #endif 240 static hci_stack_t * hci_stack = NULL; 241 242 #ifdef ENABLE_CLASSIC 243 // default name 244 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 245 246 // test helper 247 static uint8_t disable_l2cap_timeouts = 0; 248 #endif 249 250 // reset connection state on create and on reconnect 251 // don't overwrite addr, con handle, role 252 static void hci_connection_init(hci_connection_t * conn){ 253 conn->authentication_flags = AUTH_FLAG_NONE; 254 conn->bonding_flags = 0; 255 conn->requested_security_level = LEVEL_0; 256 #ifdef ENABLE_CLASSIC 257 conn->request_role = HCI_ROLE_INVALID; 258 conn->sniff_subrating_max_latency = 0xffff; 259 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 260 conn->link_key_type = INVALID_LINK_KEY; 261 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 262 btstack_run_loop_set_timer_context(&conn->timeout, conn); 263 hci_connection_timestamp(conn); 264 #endif 265 conn->acl_recombination_length = 0; 266 conn->acl_recombination_pos = 0; 267 conn->num_packets_sent = 0; 268 269 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 270 #ifdef ENABLE_BLE 271 conn->le_phy_update_all_phys = 0xff; 272 #endif 273 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 274 conn->le_max_tx_octets = 27; 275 #endif 276 #ifdef ENABLE_CLASSIC_PAIRING_OOB 277 conn->classic_oob_c_192 = NULL; 278 conn->classic_oob_r_192 = NULL; 279 conn->classic_oob_c_256 = NULL; 280 conn->classic_oob_r_256 = NULL; 281 #endif 282 } 283 284 /** 285 * create connection for given address 286 * 287 * @return connection OR NULL, if no memory left 288 */ 289 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 290 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 291 292 hci_connection_t * conn = btstack_memory_hci_connection_get(); 293 if (!conn) return NULL; 294 hci_connection_init(conn); 295 296 bd_addr_copy(conn->address, addr); 297 conn->address_type = addr_type; 298 conn->con_handle = HCI_CON_HANDLE_INVALID; 299 conn->role = HCI_ROLE_INVALID; 300 301 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 302 303 return conn; 304 } 305 306 307 /** 308 * get le connection parameter range 309 * 310 * @return le connection parameter range struct 311 */ 312 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 313 *range = hci_stack->le_connection_parameter_range; 314 } 315 316 /** 317 * set le connection parameter range 318 * 319 */ 320 321 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 322 hci_stack->le_connection_parameter_range = *range; 323 } 324 325 /** 326 * @brief Test if connection parameters are inside in existing rage 327 * @param conn_interval_min (unit: 1.25ms) 328 * @param conn_interval_max (unit: 1.25ms) 329 * @param conn_latency 330 * @param supervision_timeout (unit: 10ms) 331 * @return 1 if included 332 */ 333 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){ 334 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 335 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 336 337 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 338 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 339 340 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 341 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 342 343 return 1; 344 } 345 346 /** 347 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 348 * @note: default: 1 349 * @param max_peripheral_connections 350 */ 351 #ifdef ENABLE_LE_PERIPHERAL 352 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 353 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 354 } 355 #endif 356 357 /** 358 * get hci connections iterator 359 * 360 * @return hci connections iterator 361 */ 362 363 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 364 btstack_linked_list_iterator_init(it, &hci_stack->connections); 365 } 366 367 /** 368 * get connection for a given handle 369 * 370 * @return connection OR NULL, if not found 371 */ 372 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 373 btstack_linked_list_iterator_t it; 374 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 375 while (btstack_linked_list_iterator_has_next(&it)){ 376 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 377 if ( item->con_handle == con_handle ) { 378 return item; 379 } 380 } 381 return NULL; 382 } 383 384 /** 385 * get connection for given address 386 * 387 * @return connection OR NULL, if not found 388 */ 389 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 390 btstack_linked_list_iterator_t it; 391 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 392 while (btstack_linked_list_iterator_has_next(&it)){ 393 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 394 if (connection->address_type != addr_type) continue; 395 if (memcmp(addr, connection->address, 6) != 0) continue; 396 return connection; 397 } 398 return NULL; 399 } 400 401 #ifdef ENABLE_CLASSIC 402 403 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 404 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 405 } 406 407 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 408 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 409 } 410 411 #ifdef ENABLE_SCO_OVER_HCI 412 static int hci_number_sco_connections(void){ 413 int connections = 0; 414 btstack_linked_list_iterator_t it; 415 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 416 while (btstack_linked_list_iterator_has_next(&it)){ 417 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 418 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 419 connections++; 420 } 421 return connections; 422 } 423 #endif 424 425 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 426 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 427 #ifdef HAVE_EMBEDDED_TICK 428 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 429 // connections might be timed out 430 hci_emit_l2cap_check_timeout(connection); 431 } 432 #else 433 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 434 // connections might be timed out 435 hci_emit_l2cap_check_timeout(connection); 436 } 437 #endif 438 } 439 440 static void hci_connection_timestamp(hci_connection_t *connection){ 441 #ifdef HAVE_EMBEDDED_TICK 442 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 443 #else 444 connection->timestamp = btstack_run_loop_get_time_ms(); 445 #endif 446 } 447 448 /** 449 * add authentication flags and reset timer 450 * @note: assumes classic connection 451 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 452 */ 453 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 454 bd_addr_t addr; 455 reverse_bd_addr(bd_addr, addr); 456 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 457 if (conn) { 458 connectionSetAuthenticationFlags(conn, flags); 459 hci_connection_timestamp(conn); 460 } 461 } 462 463 static bool hci_pairing_active(hci_connection_t * hci_connection){ 464 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 465 } 466 467 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 468 if (hci_pairing_active(hci_connection)) return; 469 if (ssp){ 470 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 471 } else { 472 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 473 } 474 // if we are initiator, we have sent an HCI Authenticate Request 475 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 476 477 // if we are responder, use minimal service security level as required level 478 if (!initiator){ 479 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); 480 } 481 482 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 483 484 uint8_t event[12]; 485 event[0] = GAP_EVENT_PAIRING_STARTED; 486 event[1] = 10; 487 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 488 reverse_bd_addr(hci_connection->address, &event[4]); 489 event[10] = (uint8_t) ssp; 490 event[11] = (uint8_t) initiator; 491 hci_emit_event(event, sizeof(event), 1); 492 } 493 494 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 495 hci_connection->requested_security_level = LEVEL_0; 496 if (!hci_pairing_active(hci_connection)) return; 497 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 498 #ifdef ENABLE_CLASSIC_PAIRING_OOB 499 hci_connection->classic_oob_c_192 = NULL; 500 hci_connection->classic_oob_r_192 = NULL; 501 hci_connection->classic_oob_c_256 = NULL; 502 hci_connection->classic_oob_r_256 = NULL; 503 #endif 504 log_info("pairing complete, status %02x", status); 505 506 uint8_t event[11]; 507 event[0] = GAP_EVENT_PAIRING_COMPLETE; 508 event[1] = 9; 509 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 510 reverse_bd_addr(hci_connection->address, &event[4]); 511 event[10] = status; 512 hci_emit_event(event, sizeof(event), 1); 513 514 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 515 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 516 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 517 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 518 hci_connection->bonding_status = status; 519 } 520 } 521 522 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 523 hci_connection_t * conn = hci_connection_for_handle(handle); 524 if (!conn) return false; 525 return hci_pairing_active(conn); 526 } 527 528 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 529 if (!hci_stack->link_key_db) return; 530 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 531 hci_stack->link_key_db->delete_link_key(addr); 532 } 533 534 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 535 if (!hci_stack->link_key_db) return; 536 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 537 hci_stack->link_key_db->put_link_key(addr, link_key, type); 538 } 539 540 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 541 if (!hci_stack->link_key_db) return false; 542 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 543 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 544 return result; 545 } 546 547 void gap_delete_all_link_keys(void){ 548 bd_addr_t addr; 549 link_key_t link_key; 550 link_key_type_t type; 551 btstack_link_key_iterator_t it; 552 int ok = gap_link_key_iterator_init(&it); 553 if (!ok) { 554 log_error("could not initialize iterator"); 555 return; 556 } 557 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 558 gap_drop_link_key_for_bd_addr(addr); 559 } 560 gap_link_key_iterator_done(&it); 561 } 562 563 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 564 if (!hci_stack->link_key_db) return 0; 565 if (!hci_stack->link_key_db->iterator_init) return 0; 566 return hci_stack->link_key_db->iterator_init(it); 567 } 568 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){ 569 if (!hci_stack->link_key_db) return 0; 570 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 571 } 572 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 573 if (!hci_stack->link_key_db) return; 574 hci_stack->link_key_db->iterator_done(it); 575 } 576 #endif 577 578 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 579 switch (address_type){ 580 case BD_ADDR_TYPE_LE_PUBLIC: 581 case BD_ADDR_TYPE_LE_RANDOM: 582 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 583 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 584 return true; 585 default: 586 return false; 587 } 588 } 589 590 static int hci_is_le_connection(hci_connection_t * connection){ 591 return hci_is_le_connection_type(connection->address_type); 592 } 593 594 /** 595 * count connections 596 */ 597 static int nr_hci_connections(void){ 598 int count = 0; 599 btstack_linked_item_t *it; 600 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 601 count++; 602 } 603 return count; 604 } 605 606 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 607 608 unsigned int num_packets_sent_classic = 0; 609 unsigned int num_packets_sent_le = 0; 610 611 btstack_linked_item_t *it; 612 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 613 hci_connection_t * connection = (hci_connection_t *) it; 614 if (hci_is_le_connection(connection)){ 615 num_packets_sent_le += connection->num_packets_sent; 616 } 617 if (connection->address_type == BD_ADDR_TYPE_ACL){ 618 num_packets_sent_classic += connection->num_packets_sent; 619 } 620 } 621 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 622 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 623 int free_slots_le = 0; 624 625 if (free_slots_classic < 0){ 626 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); 627 return 0; 628 } 629 630 if (hci_stack->le_acl_packets_total_num){ 631 // if we have LE slots, they are used 632 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 633 if (free_slots_le < 0){ 634 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); 635 return 0; 636 } 637 } else { 638 // otherwise, classic slots are used for LE, too 639 free_slots_classic -= num_packets_sent_le; 640 if (free_slots_classic < 0){ 641 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); 642 return 0; 643 } 644 } 645 646 switch (address_type){ 647 case BD_ADDR_TYPE_UNKNOWN: 648 log_error("hci_number_free_acl_slots: unknown address type"); 649 return 0; 650 651 case BD_ADDR_TYPE_ACL: 652 return (uint16_t) free_slots_classic; 653 654 default: 655 if (hci_stack->le_acl_packets_total_num > 0){ 656 return (uint16_t) free_slots_le; 657 } 658 return (uint16_t) free_slots_classic; 659 } 660 } 661 662 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 663 // get connection type 664 hci_connection_t * connection = hci_connection_for_handle(con_handle); 665 if (!connection){ 666 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 667 return 0; 668 } 669 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 670 } 671 672 #ifdef ENABLE_CLASSIC 673 static int hci_number_free_sco_slots(void){ 674 unsigned int num_sco_packets_sent = 0; 675 btstack_linked_item_t *it; 676 if (hci_stack->synchronous_flow_control_enabled){ 677 // explicit flow control 678 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 679 hci_connection_t * connection = (hci_connection_t *) it; 680 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 681 num_sco_packets_sent += connection->num_packets_sent; 682 } 683 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 684 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 685 return 0; 686 } 687 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 688 } else { 689 // implicit flow control -- TODO 690 int num_ready = 0; 691 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 692 hci_connection_t * connection = (hci_connection_t *) it; 693 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 694 if (connection->sco_tx_ready == 0) continue; 695 num_ready++; 696 } 697 return num_ready; 698 } 699 } 700 #endif 701 702 // only used to send HCI Host Number Completed Packets 703 static int hci_can_send_comand_packet_transport(void){ 704 if (hci_stack->hci_packet_buffer_reserved) return 0; 705 706 // check for async hci transport implementations 707 if (hci_stack->hci_transport->can_send_packet_now){ 708 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 709 return 0; 710 } 711 } 712 return 1; 713 } 714 715 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 716 bool hci_can_send_command_packet_now(void){ 717 if (hci_can_send_comand_packet_transport() == 0) return false; 718 return hci_stack->num_cmd_packets > 0u; 719 } 720 721 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 722 // check for async hci transport implementations 723 if (!hci_stack->hci_transport->can_send_packet_now) return true; 724 return hci_stack->hci_transport->can_send_packet_now(packet_type); 725 } 726 727 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 728 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 729 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 730 } 731 732 bool hci_can_send_acl_le_packet_now(void){ 733 if (hci_stack->hci_packet_buffer_reserved) return false; 734 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 735 } 736 737 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 738 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 739 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 740 } 741 742 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 743 if (hci_stack->hci_packet_buffer_reserved) return false; 744 return hci_can_send_prepared_acl_packet_now(con_handle); 745 } 746 747 #ifdef ENABLE_CLASSIC 748 bool hci_can_send_acl_classic_packet_now(void){ 749 if (hci_stack->hci_packet_buffer_reserved) return false; 750 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 751 } 752 753 bool hci_can_send_prepared_sco_packet_now(void){ 754 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 755 if (hci_have_usb_transport()){ 756 return hci_stack->sco_can_send_now; 757 } else { 758 return hci_number_free_sco_slots() > 0; 759 } 760 } 761 762 bool hci_can_send_sco_packet_now(void){ 763 if (hci_stack->hci_packet_buffer_reserved) return false; 764 return hci_can_send_prepared_sco_packet_now(); 765 } 766 767 void hci_request_sco_can_send_now_event(void){ 768 hci_stack->sco_waiting_for_can_send_now = 1; 769 hci_notify_if_sco_can_send_now(); 770 } 771 #endif 772 773 // used for internal checks in l2cap.c 774 bool hci_is_packet_buffer_reserved(void){ 775 return hci_stack->hci_packet_buffer_reserved; 776 } 777 778 // reserves outgoing packet buffer. 779 // @return 1 if successful 780 bool hci_reserve_packet_buffer(void){ 781 if (hci_stack->hci_packet_buffer_reserved) { 782 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 783 return false; 784 } 785 hci_stack->hci_packet_buffer_reserved = true; 786 return true; 787 } 788 789 void hci_release_packet_buffer(void){ 790 hci_stack->hci_packet_buffer_reserved = false; 791 } 792 793 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 794 static int hci_transport_synchronous(void){ 795 return hci_stack->hci_transport->can_send_packet_now == NULL; 796 } 797 798 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 799 800 // 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); 801 802 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 803 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 804 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 805 max_acl_data_packet_length = hci_stack->le_data_packets_length; 806 } 807 808 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 809 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 810 max_acl_data_packet_length = connection->le_max_tx_octets; 811 } 812 #endif 813 814 log_debug("hci_send_acl_packet_fragments entered"); 815 816 uint8_t status = ERROR_CODE_SUCCESS; 817 // multiple packets could be send on a synchronous HCI transport 818 while (true){ 819 820 log_debug("hci_send_acl_packet_fragments loop entered"); 821 822 // get current data 823 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 824 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 825 bool more_fragments = false; 826 827 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 828 if (current_acl_data_packet_length > max_acl_data_packet_length){ 829 more_fragments = true; 830 current_acl_data_packet_length = max_acl_data_packet_length; 831 } 832 833 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 834 if (acl_header_pos > 0u){ 835 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 836 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 837 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 838 } 839 840 // update header len 841 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 842 843 // count packet 844 connection->num_packets_sent++; 845 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 846 847 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 848 if (more_fragments){ 849 // update start of next fragment to send 850 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 851 } else { 852 // done 853 hci_stack->acl_fragmentation_pos = 0; 854 hci_stack->acl_fragmentation_total_size = 0; 855 } 856 857 // send packet 858 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 859 const int size = current_acl_data_packet_length + 4; 860 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 861 hci_stack->acl_fragmentation_tx_active = 1; 862 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 863 if (err != 0){ 864 // no error from HCI Transport expected 865 status = ERROR_CODE_HARDWARE_FAILURE; 866 } 867 868 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 869 870 // done yet? 871 if (!more_fragments) break; 872 873 // can send more? 874 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 875 } 876 877 log_debug("hci_send_acl_packet_fragments loop over"); 878 879 // release buffer now for synchronous transport 880 if (hci_transport_synchronous()){ 881 hci_stack->acl_fragmentation_tx_active = 0; 882 hci_release_packet_buffer(); 883 hci_emit_transport_packet_sent(); 884 } 885 886 return status; 887 } 888 889 // pre: caller has reserved the packet buffer 890 uint8_t hci_send_acl_packet_buffer(int size){ 891 btstack_assert(hci_stack->hci_packet_buffer_reserved); 892 893 uint8_t * packet = hci_stack->hci_packet_buffer; 894 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 895 896 // check for free places on Bluetooth module 897 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 898 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 899 hci_release_packet_buffer(); 900 hci_emit_transport_packet_sent(); 901 return BTSTACK_ACL_BUFFERS_FULL; 902 } 903 904 hci_connection_t *connection = hci_connection_for_handle( con_handle); 905 if (!connection) { 906 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 907 hci_release_packet_buffer(); 908 hci_emit_transport_packet_sent(); 909 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 910 } 911 912 #ifdef ENABLE_CLASSIC 913 hci_connection_timestamp(connection); 914 #endif 915 916 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 917 918 // setup data 919 hci_stack->acl_fragmentation_total_size = size; 920 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 921 922 return hci_send_acl_packet_fragments(connection); 923 } 924 925 #ifdef ENABLE_CLASSIC 926 // pre: caller has reserved the packet buffer 927 uint8_t hci_send_sco_packet_buffer(int size){ 928 btstack_assert(hci_stack->hci_packet_buffer_reserved); 929 930 uint8_t * packet = hci_stack->hci_packet_buffer; 931 932 // skip checks in loopback mode 933 if (!hci_stack->loopback_mode){ 934 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 935 936 // check for free places on Bluetooth module 937 if (!hci_can_send_prepared_sco_packet_now()) { 938 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 939 hci_release_packet_buffer(); 940 hci_emit_transport_packet_sent(); 941 return BTSTACK_ACL_BUFFERS_FULL; 942 } 943 944 // track send packet in connection struct 945 hci_connection_t *connection = hci_connection_for_handle( con_handle); 946 if (!connection) { 947 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 948 hci_release_packet_buffer(); 949 hci_emit_transport_packet_sent(); 950 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 951 } 952 953 if (hci_have_usb_transport()){ 954 // token used 955 hci_stack->sco_can_send_now = false; 956 } else { 957 if (hci_stack->synchronous_flow_control_enabled){ 958 connection->num_packets_sent++; 959 } else { 960 connection->sco_tx_ready--; 961 } 962 } 963 } 964 965 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 966 967 #ifdef HAVE_SCO_TRANSPORT 968 hci_stack->sco_transport->send_packet(packet, size); 969 hci_release_packet_buffer(); 970 hci_emit_transport_packet_sent(); 971 972 return 0; 973 #else 974 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 975 if (hci_transport_synchronous()){ 976 hci_release_packet_buffer(); 977 hci_emit_transport_packet_sent(); 978 } 979 980 if (err != 0){ 981 return ERROR_CODE_HARDWARE_FAILURE; 982 } 983 return ERROR_CODE_SUCCESS; 984 #endif 985 } 986 #endif 987 988 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 989 static uint8_t hci_send_iso_packet_fragments(void){ 990 991 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 992 uint8_t status = ERROR_CODE_SUCCESS; 993 // multiple packets could be send on a synchronous HCI transport 994 while (true){ 995 996 // get current data 997 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 998 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 999 bool more_fragments = false; 1000 1001 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 1002 if (current_iso_data_packet_length > max_iso_data_packet_length){ 1003 more_fragments = true; 1004 current_iso_data_packet_length = max_iso_data_packet_length; 1005 } 1006 1007 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1008 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1009 uint8_t pb_flags; 1010 if (iso_header_pos == 0u){ 1011 // first fragment, keep TS field 1012 pb_flags = more_fragments ? 0x00 : 0x02; 1013 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1014 } else { 1015 // later fragment, drop TS field 1016 pb_flags = more_fragments ? 0x01 : 0x03; 1017 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1018 } 1019 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1020 1021 // update header len 1022 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1023 1024 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1025 if (more_fragments){ 1026 // update start of next fragment to send 1027 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1028 } else { 1029 // done 1030 hci_stack->iso_fragmentation_pos = 0; 1031 hci_stack->iso_fragmentation_total_size = 0; 1032 } 1033 1034 // send packet 1035 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1036 const int size = current_iso_data_packet_length + 4; 1037 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1038 hci_stack->iso_fragmentation_tx_active = true; 1039 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1040 if (err != 0){ 1041 // no error from HCI Transport expected 1042 status = ERROR_CODE_HARDWARE_FAILURE; 1043 } 1044 1045 // done yet? 1046 if (!more_fragments) break; 1047 1048 // can send more? 1049 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1050 } 1051 1052 // release buffer now for synchronous transport 1053 if (hci_transport_synchronous()){ 1054 hci_stack->iso_fragmentation_tx_active = false; 1055 hci_release_packet_buffer(); 1056 hci_emit_transport_packet_sent(); 1057 } 1058 1059 return status; 1060 } 1061 1062 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1063 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1064 1065 // setup data 1066 hci_stack->iso_fragmentation_total_size = size; 1067 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1068 1069 // TODO: check for space on controller 1070 // TODO: track outgoing packet sent 1071 1072 return hci_send_iso_packet_fragments(); 1073 } 1074 #endif 1075 1076 static void acl_handler(uint8_t *packet, uint16_t size){ 1077 1078 // get info 1079 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1080 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1081 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1082 uint16_t acl_length = READ_ACL_LENGTH(packet); 1083 1084 // ignore non-registered handle 1085 if (!conn){ 1086 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1087 return; 1088 } 1089 1090 // assert packet is complete 1091 if ((acl_length + 4u) != size){ 1092 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1093 return; 1094 } 1095 1096 #ifdef ENABLE_CLASSIC 1097 // update idle timestamp 1098 hci_connection_timestamp(conn); 1099 #endif 1100 1101 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1102 hci_stack->host_completed_packets = 1; 1103 conn->num_packets_completed++; 1104 #endif 1105 1106 // handle different packet types 1107 switch (acl_flags & 0x03u) { 1108 1109 case 0x01: // continuation fragment 1110 1111 // sanity checks 1112 if (conn->acl_recombination_pos == 0u) { 1113 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1114 return; 1115 } 1116 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1117 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1118 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1119 conn->acl_recombination_pos = 0; 1120 return; 1121 } 1122 1123 // append fragment payload (header already stored) 1124 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1125 &packet[4], acl_length); 1126 conn->acl_recombination_pos += acl_length; 1127 1128 // forward complete L2CAP packet if complete. 1129 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1130 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1131 // reset recombination buffer 1132 conn->acl_recombination_length = 0; 1133 conn->acl_recombination_pos = 0; 1134 } 1135 break; 1136 1137 case 0x02: { // first fragment 1138 1139 // sanity check 1140 if (conn->acl_recombination_pos) { 1141 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1142 conn->acl_recombination_pos = 0; 1143 } 1144 1145 // peek into L2CAP packet! 1146 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1147 1148 // compare fragment size to L2CAP packet size 1149 if (acl_length >= (l2cap_length + 4u)){ 1150 // forward fragment as L2CAP packet 1151 hci_emit_acl_packet(packet, acl_length + 4u); 1152 } else { 1153 1154 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1155 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1156 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1157 return; 1158 } 1159 1160 // store first fragment and tweak acl length for complete package 1161 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1162 packet, acl_length + 4u); 1163 conn->acl_recombination_pos = acl_length + 4u; 1164 conn->acl_recombination_length = l2cap_length; 1165 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1166 } 1167 break; 1168 1169 } 1170 default: 1171 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1172 return; 1173 } 1174 1175 // execute main loop 1176 hci_run(); 1177 } 1178 1179 static void hci_connection_stop_timer(hci_connection_t * conn){ 1180 btstack_run_loop_remove_timer(&conn->timeout); 1181 #ifdef ENABLE_CLASSIC 1182 btstack_run_loop_remove_timer(&conn->timeout_sco); 1183 #endif 1184 } 1185 1186 static void hci_shutdown_connection(hci_connection_t *conn){ 1187 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1188 1189 #ifdef ENABLE_CLASSIC 1190 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1191 bd_addr_type_t addr_type = conn->address_type; 1192 #endif 1193 #ifdef HAVE_SCO_TRANSPORT 1194 hci_con_handle_t con_handle = conn->con_handle; 1195 #endif 1196 #endif 1197 1198 hci_connection_stop_timer(conn); 1199 1200 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1201 btstack_memory_hci_connection_free( conn ); 1202 1203 // now it's gone 1204 hci_emit_nr_connections_changed(); 1205 1206 #ifdef ENABLE_CLASSIC 1207 #ifdef ENABLE_SCO_OVER_HCI 1208 // update SCO 1209 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1210 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1211 } 1212 #endif 1213 #ifdef HAVE_SCO_TRANSPORT 1214 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1215 hci_stack->sco_transport->close(con_handle); 1216 } 1217 #endif 1218 #endif 1219 } 1220 1221 #ifdef ENABLE_CLASSIC 1222 1223 static const uint16_t packet_type_sizes[] = { 1224 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1225 HCI_ACL_DH1_SIZE, 0, 0, 0, 1226 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1227 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1228 }; 1229 static const uint8_t packet_type_feature_requirement_bit[] = { 1230 0, // 3 slot packets 1231 1, // 5 slot packets 1232 25, // EDR 2 mpbs 1233 26, // EDR 3 mbps 1234 39, // 3 slot EDR packts 1235 40, // 5 slot EDR packet 1236 }; 1237 static const uint16_t packet_type_feature_packet_mask[] = { 1238 0x0f00, // 3 slot packets 1239 0xf000, // 5 slot packets 1240 0x1102, // EDR 2 mpbs 1241 0x2204, // EDR 3 mbps 1242 0x0300, // 3 slot EDR packts 1243 0x3000, // 5 slot EDR packet 1244 }; 1245 1246 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1247 // enable packet types based on size 1248 uint16_t packet_types = 0; 1249 unsigned int i; 1250 for (i=0;i<16;i++){ 1251 if (packet_type_sizes[i] == 0) continue; 1252 if (packet_type_sizes[i] <= buffer_size){ 1253 packet_types |= 1 << i; 1254 } 1255 } 1256 // disable packet types due to missing local supported features 1257 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1258 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1259 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1260 if (feature_set) continue; 1261 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1262 packet_types &= ~packet_type_feature_packet_mask[i]; 1263 } 1264 // flip bits for "may not be used" 1265 packet_types ^= 0x3306; 1266 return packet_types; 1267 } 1268 1269 uint16_t hci_usable_acl_packet_types(void){ 1270 return hci_stack->packet_types; 1271 } 1272 #endif 1273 1274 uint8_t* hci_get_outgoing_packet_buffer(void){ 1275 // hci packet buffer is >= acl data packet length 1276 return hci_stack->hci_packet_buffer; 1277 } 1278 1279 uint16_t hci_max_acl_data_packet_length(void){ 1280 return hci_stack->acl_data_packet_length; 1281 } 1282 1283 #ifdef ENABLE_CLASSIC 1284 bool hci_extended_sco_link_supported(void){ 1285 // No. 31, byte 3, bit 7 1286 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1287 } 1288 #endif 1289 1290 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1291 // No. 54, byte 6, bit 6 1292 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1293 } 1294 1295 #ifdef ENABLE_CLASSIC 1296 static int gap_ssp_supported(void){ 1297 // No. 51, byte 6, bit 3 1298 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1299 } 1300 #endif 1301 1302 static int hci_classic_supported(void){ 1303 #ifdef ENABLE_CLASSIC 1304 // No. 37, byte 4, bit 5, = No BR/EDR Support 1305 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1306 #else 1307 return 0; 1308 #endif 1309 } 1310 1311 static int hci_le_supported(void){ 1312 #ifdef ENABLE_BLE 1313 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1314 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1315 #else 1316 return 0; 1317 #endif 1318 } 1319 1320 static bool hci_command_supported(uint8_t command_index){ 1321 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1322 } 1323 1324 #ifdef ENABLE_BLE 1325 1326 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1327 static bool hci_extended_advertising_supported(void){ 1328 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1329 } 1330 #endif 1331 1332 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1333 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1334 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1335 } else { 1336 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1337 } 1338 } 1339 1340 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1341 *addr_type = hci_stack->le_own_addr_type; 1342 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1343 } 1344 1345 #ifdef ENABLE_LE_PERIPHERAL 1346 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1347 *addr_type = hci_stack->le_advertisements_own_addr_type; 1348 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1349 }; 1350 #endif 1351 1352 #ifdef ENABLE_LE_CENTRAL 1353 1354 /** 1355 * @brief Get own addr type and address used for LE connections (Central) 1356 */ 1357 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1358 *addr_type = hci_stack->le_connection_own_addr_type; 1359 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1360 } 1361 1362 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1363 1364 uint16_t offset = 3; 1365 uint8_t num_reports = packet[offset]; 1366 offset += 1; 1367 1368 uint16_t i; 1369 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1370 for (i=0; (i<num_reports) && (offset < size);i++){ 1371 // sanity checks on data_length: 1372 uint8_t data_length = packet[offset + 8]; 1373 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1374 if ((offset + 9u + data_length + 1u) > size) return; 1375 // setup event 1376 uint8_t event_size = 10u + data_length; 1377 uint16_t pos = 0; 1378 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1379 event[pos++] = event_size; 1380 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1381 offset += 8; 1382 pos += 8; 1383 event[pos++] = packet[offset + 1 + data_length]; // rssi 1384 event[pos++] = data_length; 1385 offset++; 1386 (void)memcpy(&event[pos], &packet[offset], data_length); 1387 pos += data_length; 1388 offset += data_length + 1u; // rssi 1389 hci_emit_event(event, pos, 1); 1390 } 1391 } 1392 1393 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1394 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1395 uint16_t offset = 3; 1396 uint8_t num_reports = packet[offset++]; 1397 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1398 uint8_t i; 1399 for (i=0; (i<num_reports) && (offset < size);i++){ 1400 // sanity checks on data_length: 1401 uint16_t data_length = packet[offset + 23]; 1402 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1403 if ((offset + 24u + data_length) > size) return; 1404 uint16_t event_type = little_endian_read_16(packet, offset); 1405 offset += 2; 1406 if ((event_type & 0x10) != 0) { 1407 // setup legacy event 1408 uint8_t legacy_event_type; 1409 switch (event_type){ 1410 case 0b0010011: 1411 // ADV_IND 1412 legacy_event_type = 0; 1413 break; 1414 case 0b0010101: 1415 // ADV_DIRECT_IND 1416 legacy_event_type = 1; 1417 break; 1418 case 0b0010010: 1419 // ADV_SCAN_IND 1420 legacy_event_type = 2; 1421 break; 1422 case 0b0010000: 1423 // ADV_NONCONN_IND 1424 legacy_event_type = 3; 1425 break; 1426 case 0b0011011: 1427 case 0b0011010: 1428 // SCAN_RSP 1429 legacy_event_type = 4; 1430 break; 1431 default: 1432 legacy_event_type = 0; 1433 break; 1434 } 1435 uint16_t pos = 0; 1436 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1437 event[pos++] = 10u + data_length; 1438 event[pos++] = legacy_event_type; 1439 // copy address type + address 1440 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1441 offset += 7; 1442 pos += 7; 1443 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1444 offset += 4; 1445 // copy rssi 1446 event[pos++] = packet[offset++]; 1447 // skip periodic advertising interval and direct address 1448 offset += 9; 1449 // copy data len + data; 1450 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1451 pos += 1 +data_length; 1452 offset += 1+ data_length; 1453 hci_emit_event(event, pos, 1); 1454 } else { 1455 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1456 uint8_t report_len = 24 + data_length; 1457 event[1] = report_len; 1458 little_endian_store_16(event, 2, event_type); 1459 memcpy(&event[4], &packet[offset], report_len); 1460 offset += report_len; 1461 hci_emit_event(event, 2 + report_len, 1); 1462 } 1463 } 1464 } 1465 #endif 1466 1467 #endif 1468 #endif 1469 1470 #ifdef ENABLE_BLE 1471 #ifdef ENABLE_LE_PERIPHERAL 1472 static void hci_update_advertisements_enabled_for_current_roles(void){ 1473 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1474 // get number of active le slave connections 1475 int num_slave_connections = 0; 1476 btstack_linked_list_iterator_t it; 1477 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1478 while (btstack_linked_list_iterator_has_next(&it)){ 1479 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1480 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1481 if (con->state != OPEN) continue; 1482 if (con->role != HCI_ROLE_SLAVE) continue; 1483 if (!hci_is_le_connection(con)) continue; 1484 num_slave_connections++; 1485 } 1486 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1487 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1488 } else { 1489 hci_stack->le_advertisements_enabled_for_current_roles = false; 1490 } 1491 } 1492 #endif 1493 #endif 1494 1495 #ifdef ENABLE_CLASSIC 1496 static void gap_run_set_local_name(void){ 1497 hci_reserve_packet_buffer(); 1498 uint8_t * packet = hci_stack->hci_packet_buffer; 1499 // construct HCI Command and send 1500 uint16_t opcode = hci_write_local_name.opcode; 1501 hci_stack->last_cmd_opcode = opcode; 1502 packet[0] = opcode & 0xff; 1503 packet[1] = opcode >> 8; 1504 packet[2] = DEVICE_NAME_LEN; 1505 memset(&packet[3], 0, DEVICE_NAME_LEN); 1506 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1507 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1508 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1509 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1510 // expand '00:00:00:00:00:00' in name with bd_addr 1511 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1512 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1513 } 1514 1515 static void gap_run_set_eir_data(void){ 1516 hci_reserve_packet_buffer(); 1517 uint8_t * packet = hci_stack->hci_packet_buffer; 1518 // construct HCI Command in-place and send 1519 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1520 hci_stack->last_cmd_opcode = opcode; 1521 uint16_t offset = 0; 1522 packet[offset++] = opcode & 0xff; 1523 packet[offset++] = opcode >> 8; 1524 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1525 packet[offset++] = 0; // FEC not required 1526 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1527 if (hci_stack->eir_data){ 1528 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1529 ad_context_t context; 1530 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1531 uint8_t data_type = ad_iterator_get_data_type(&context); 1532 uint8_t size = ad_iterator_get_data_len(&context); 1533 const uint8_t *data = ad_iterator_get_data(&context); 1534 // copy item 1535 packet[offset++] = size + 1; 1536 packet[offset++] = data_type; 1537 memcpy(&packet[offset], data, size); 1538 // update name item 1539 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1540 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1541 } 1542 offset += size; 1543 } 1544 } else { 1545 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1546 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1547 packet[offset++] = bytes_to_copy + 1; 1548 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1549 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1550 // expand '00:00:00:00:00:00' in name with bd_addr 1551 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1552 } 1553 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1554 } 1555 1556 static void hci_run_gap_tasks_classic(void){ 1557 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1558 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1559 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1560 return; 1561 } 1562 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1563 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1564 gap_run_set_local_name(); 1565 return; 1566 } 1567 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1568 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1569 gap_run_set_eir_data(); 1570 return; 1571 } 1572 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1573 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1574 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1575 return; 1576 } 1577 // write page scan activity 1578 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1579 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1580 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1581 return; 1582 } 1583 // write page scan type 1584 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1585 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1586 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1587 return; 1588 } 1589 // write page timeout 1590 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1591 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1592 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1593 return; 1594 } 1595 // send scan enable 1596 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1597 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1598 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1599 return; 1600 } 1601 // send write scan activity 1602 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1603 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1604 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1605 return; 1606 } 1607 } 1608 #endif 1609 1610 #ifndef HAVE_HOST_CONTROLLER_API 1611 1612 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1613 if (!hci_stack->config) return 0; 1614 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1615 // Limit baud rate for Broadcom chipsets to 3 mbps 1616 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1617 baud_rate = 3000000; 1618 } 1619 return baud_rate; 1620 } 1621 1622 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1623 UNUSED(ds); 1624 1625 switch (hci_stack->substate){ 1626 case HCI_INIT_W4_SEND_RESET: 1627 log_info("Resend HCI Reset"); 1628 hci_stack->substate = HCI_INIT_SEND_RESET; 1629 hci_stack->num_cmd_packets = 1; 1630 hci_run(); 1631 break; 1632 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1633 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1634 if (hci_stack->hci_transport->reset_link){ 1635 hci_stack->hci_transport->reset_link(); 1636 } 1637 1638 /* fall through */ 1639 1640 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1641 log_info("Resend HCI Reset - CSR Warm Boot"); 1642 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1643 hci_stack->num_cmd_packets = 1; 1644 hci_run(); 1645 break; 1646 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1647 if (hci_stack->hci_transport->set_baudrate){ 1648 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1649 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1650 hci_stack->hci_transport->set_baudrate(baud_rate); 1651 } 1652 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1653 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1654 if (hci_stack->hci_transport->reset_link){ 1655 log_info("Link Reset"); 1656 hci_stack->hci_transport->reset_link(); 1657 } 1658 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1659 hci_run(); 1660 } 1661 break; 1662 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1663 // otherwise continue 1664 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1665 hci_send_cmd(&hci_read_local_supported_commands); 1666 break; 1667 default: 1668 break; 1669 } 1670 } 1671 #endif 1672 1673 static void hci_initializing_next_state(void){ 1674 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1675 } 1676 1677 static void hci_init_done(void){ 1678 // done. tell the app 1679 log_info("hci_init_done -> HCI_STATE_WORKING"); 1680 hci_stack->state = HCI_STATE_WORKING; 1681 hci_emit_state(); 1682 } 1683 1684 // assumption: hci_can_send_command_packet_now() == true 1685 static void hci_initializing_run(void){ 1686 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1687 1688 if (!hci_can_send_command_packet_now()) return; 1689 1690 #ifndef HAVE_HOST_CONTROLLER_API 1691 bool need_baud_change = hci_stack->config 1692 && hci_stack->chipset 1693 && hci_stack->chipset->set_baudrate_command 1694 && hci_stack->hci_transport->set_baudrate 1695 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1696 #endif 1697 1698 switch (hci_stack->substate){ 1699 case HCI_INIT_SEND_RESET: 1700 hci_state_reset(); 1701 1702 #ifndef HAVE_HOST_CONTROLLER_API 1703 // prepare reset if command complete not received in 100ms 1704 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1705 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1706 btstack_run_loop_add_timer(&hci_stack->timeout); 1707 #endif 1708 // send command 1709 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1710 hci_send_cmd(&hci_reset); 1711 break; 1712 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1713 hci_send_cmd(&hci_read_local_version_information); 1714 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1715 break; 1716 1717 #ifndef HAVE_HOST_CONTROLLER_API 1718 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1719 hci_state_reset(); 1720 // prepare reset if command complete not received in 100ms 1721 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1722 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1723 btstack_run_loop_add_timer(&hci_stack->timeout); 1724 // send command 1725 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1726 hci_send_cmd(&hci_reset); 1727 break; 1728 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1729 hci_state_reset(); 1730 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1731 hci_send_cmd(&hci_reset); 1732 break; 1733 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1734 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1735 hci_stack->chipset->set_baudrate_command(baud_rate, 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_SEND_BAUD_CHANGE_BCM; 1738 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1739 break; 1740 } 1741 case HCI_INIT_SET_BD_ADDR: 1742 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1743 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1744 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1745 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1746 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1747 break; 1748 case HCI_INIT_SEND_READ_LOCAL_NAME: 1749 #ifdef ENABLE_CLASSIC 1750 hci_send_cmd(&hci_read_local_name); 1751 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1752 break; 1753 #endif 1754 /* fall through */ 1755 1756 case HCI_INIT_SEND_BAUD_CHANGE: 1757 if (need_baud_change) { 1758 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1759 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1760 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1761 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1762 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1763 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1764 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1765 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1766 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1767 btstack_run_loop_add_timer(&hci_stack->timeout); 1768 } 1769 break; 1770 } 1771 1772 /* fall through */ 1773 1774 case HCI_INIT_CUSTOM_INIT: 1775 // Custom initialization 1776 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1777 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1778 bool send_cmd = false; 1779 switch (hci_stack->chipset_result){ 1780 case BTSTACK_CHIPSET_VALID_COMMAND: 1781 send_cmd = true; 1782 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1783 break; 1784 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1785 send_cmd = true; 1786 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1787 log_info("CSR Warm Boot"); 1788 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1789 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1790 btstack_run_loop_add_timer(&hci_stack->timeout); 1791 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1792 && hci_stack->config 1793 && hci_stack->chipset 1794 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1795 && hci_stack->hci_transport->set_baudrate 1796 && hci_transport_uart_get_main_baud_rate()){ 1797 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1798 } else { 1799 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1800 } 1801 break; 1802 default: 1803 break; 1804 } 1805 1806 if (send_cmd){ 1807 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1808 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1809 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1810 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1811 break; 1812 } 1813 log_info("Init script done"); 1814 1815 // Init script download on Broadcom chipsets causes: 1816 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1817 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1818 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1819 1820 // - baud rate to reset, restore UART baud rate if needed 1821 if (need_baud_change) { 1822 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1823 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1824 hci_stack->hci_transport->set_baudrate(baud_rate); 1825 } 1826 1827 uint16_t bcm_delay_ms = 300; 1828 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1829 // -> Work around: wait here. 1830 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1831 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1832 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1833 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1834 btstack_run_loop_add_timer(&hci_stack->timeout); 1835 break; 1836 } 1837 } 1838 #endif 1839 /* fall through */ 1840 1841 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1842 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1843 hci_send_cmd(&hci_read_local_supported_commands); 1844 break; 1845 case HCI_INIT_READ_BD_ADDR: 1846 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1847 hci_send_cmd(&hci_read_bd_addr); 1848 break; 1849 case HCI_INIT_READ_BUFFER_SIZE: 1850 // only read buffer size if supported 1851 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1852 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1853 hci_send_cmd(&hci_read_buffer_size); 1854 break; 1855 } 1856 1857 /* fall through */ 1858 1859 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1860 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1861 hci_send_cmd(&hci_read_local_supported_features); 1862 break; 1863 1864 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1865 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1866 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1867 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1868 break; 1869 case HCI_INIT_HOST_BUFFER_SIZE: 1870 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1871 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1872 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1873 break; 1874 #endif 1875 1876 case HCI_INIT_SET_EVENT_MASK: 1877 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1878 if (hci_le_supported()){ 1879 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1880 } else { 1881 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1882 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1883 } 1884 break; 1885 1886 case HCI_INIT_SET_EVENT_MASK_2: 1887 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2)){ 1888 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1889 // Encryption Change Event v2 - bit 25 1890 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1891 break; 1892 } 1893 1894 #ifdef ENABLE_CLASSIC 1895 /* fall through */ 1896 1897 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1898 if (hci_classic_supported() && gap_ssp_supported()){ 1899 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1900 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1901 break; 1902 } 1903 1904 /* fall through */ 1905 1906 case HCI_INIT_WRITE_INQUIRY_MODE: 1907 if (hci_classic_supported()){ 1908 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1909 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1910 break; 1911 } 1912 1913 /* fall through */ 1914 1915 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1916 // skip write secure connections host support if not supported or disabled 1917 if (hci_classic_supported() && hci_stack->secure_connections_enable 1918 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1919 hci_stack->secure_connections_active = true; 1920 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1921 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1922 break; 1923 } 1924 1925 /* fall through */ 1926 1927 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1928 // skip set min encryption key size 1929 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1930 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1931 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1932 break; 1933 } 1934 1935 #ifdef ENABLE_SCO_OVER_HCI 1936 /* fall through */ 1937 1938 // only sent if ENABLE_SCO_OVER_HCI is defined 1939 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1940 // skip write synchronous flow control if not supported 1941 if (hci_classic_supported() 1942 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1943 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1944 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1945 break; 1946 } 1947 /* fall through */ 1948 1949 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1950 // skip write default erroneous data reporting if not supported 1951 if (hci_classic_supported() 1952 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1953 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1954 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1955 break; 1956 } 1957 #endif 1958 1959 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1960 /* fall through */ 1961 1962 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1963 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1964 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1965 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1966 #ifdef ENABLE_SCO_OVER_HCI 1967 log_info("BCM: Route SCO data via HCI transport"); 1968 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1969 #endif 1970 #ifdef ENABLE_SCO_OVER_PCM 1971 log_info("BCM: Route SCO data via PCM interface"); 1972 #ifdef ENABLE_BCM_PCM_WBS 1973 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1974 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1975 #else 1976 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1977 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1978 #endif 1979 #endif 1980 break; 1981 } 1982 #endif 1983 1984 #ifdef ENABLE_SCO_OVER_PCM 1985 /* fall through */ 1986 1987 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1988 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1989 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1990 log_info("BCM: Config PCM interface for I2S"); 1991 #ifdef ENABLE_BCM_PCM_WBS 1992 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1993 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1994 #else 1995 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1996 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1997 #endif 1998 break; 1999 } 2000 #endif 2001 #endif 2002 2003 #ifdef ENABLE_BLE 2004 /* fall through */ 2005 2006 // LE INIT 2007 case HCI_INIT_LE_READ_BUFFER_SIZE: 2008 if (hci_le_supported()){ 2009 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2010 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2011 hci_send_cmd(&hci_le_read_buffer_size_v2); 2012 } else { 2013 hci_send_cmd(&hci_le_read_buffer_size); 2014 } 2015 break; 2016 } 2017 2018 /* fall through */ 2019 2020 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2021 // skip write le host if not supported (e.g. on LE only EM9301) 2022 if (hci_le_supported() 2023 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2024 // LE Supported Host = 1, Simultaneous Host = 0 2025 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2026 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2027 break; 2028 } 2029 2030 /* fall through */ 2031 2032 case HCI_INIT_LE_SET_EVENT_MASK: 2033 if (hci_le_supported()){ 2034 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2035 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2036 break; 2037 } 2038 #endif 2039 2040 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2041 /* fall through */ 2042 2043 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2044 if (hci_le_supported() 2045 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2046 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2047 hci_send_cmd(&hci_le_read_maximum_data_length); 2048 break; 2049 } 2050 2051 /* fall through */ 2052 2053 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2054 if (hci_le_supported() 2055 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2056 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2057 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2058 break; 2059 } 2060 #endif 2061 2062 #ifdef ENABLE_LE_CENTRAL 2063 /* fall through */ 2064 2065 case HCI_INIT_READ_WHITE_LIST_SIZE: 2066 if (hci_le_supported()){ 2067 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2068 hci_send_cmd(&hci_le_read_white_list_size); 2069 break; 2070 } 2071 2072 #endif 2073 2074 #ifdef ENABLE_LE_PERIPHERAL 2075 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2076 /* fall through */ 2077 2078 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2079 if (hci_extended_advertising_supported()){ 2080 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2081 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2082 break; 2083 } 2084 #endif 2085 #endif 2086 /* fall through */ 2087 2088 case HCI_INIT_DONE: 2089 hci_stack->substate = HCI_INIT_DONE; 2090 // main init sequence complete 2091 #ifdef ENABLE_CLASSIC 2092 // check if initial Classic GAP Tasks are completed 2093 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2094 hci_run_gap_tasks_classic(); 2095 break; 2096 } 2097 #endif 2098 #ifdef ENABLE_BLE 2099 #ifdef ENABLE_LE_CENTRAL 2100 // check if initial LE GAP Tasks are completed 2101 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2102 hci_run_general_gap_le(); 2103 break; 2104 } 2105 #endif 2106 #endif 2107 hci_init_done(); 2108 break; 2109 2110 default: 2111 return; 2112 } 2113 } 2114 2115 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2116 bool command_completed = false; 2117 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2118 uint16_t opcode = little_endian_read_16(packet,3); 2119 if (opcode == hci_stack->last_cmd_opcode){ 2120 command_completed = true; 2121 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2122 } else { 2123 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2124 } 2125 } 2126 2127 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2128 uint8_t status = packet[2]; 2129 uint16_t opcode = little_endian_read_16(packet,4); 2130 if (opcode == hci_stack->last_cmd_opcode){ 2131 if (status){ 2132 command_completed = true; 2133 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2134 } else { 2135 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2136 } 2137 } else { 2138 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2139 } 2140 } 2141 #ifndef HAVE_HOST_CONTROLLER_API 2142 // Vendor == CSR 2143 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2144 // TODO: track actual command 2145 command_completed = true; 2146 } 2147 2148 // Vendor == Toshiba 2149 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2150 // TODO: track actual command 2151 command_completed = true; 2152 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2153 hci_stack->num_cmd_packets = 1; 2154 } 2155 #endif 2156 2157 return command_completed; 2158 } 2159 2160 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2161 2162 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2163 2164 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2165 2166 #ifndef HAVE_HOST_CONTROLLER_API 2167 2168 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2169 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2170 // 2171 // HCI Reset 2172 // Timeout 100 ms 2173 // HCI Reset 2174 // Command Complete Reset 2175 // HCI Read Local Version Information 2176 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2177 // hang... 2178 // 2179 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2180 if (!command_completed 2181 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2182 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2183 2184 uint16_t opcode = little_endian_read_16(packet,3); 2185 if (opcode == hci_reset.opcode){ 2186 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2187 return; 2188 } 2189 } 2190 2191 // CSR & H5 2192 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2193 if (!command_completed 2194 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2195 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2196 2197 uint16_t opcode = little_endian_read_16(packet,3); 2198 if (opcode == hci_reset.opcode){ 2199 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2200 return; 2201 } 2202 } 2203 2204 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2205 // fix: Correct substate and behave as command below 2206 if (command_completed){ 2207 switch (hci_stack->substate){ 2208 case HCI_INIT_SEND_RESET: 2209 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2210 break; 2211 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2212 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2213 break; 2214 default: 2215 break; 2216 } 2217 } 2218 2219 #endif 2220 2221 if (!command_completed) return; 2222 2223 bool need_baud_change = false; 2224 bool need_addr_change = false; 2225 2226 #ifndef HAVE_HOST_CONTROLLER_API 2227 need_baud_change = hci_stack->config 2228 && hci_stack->chipset 2229 && hci_stack->chipset->set_baudrate_command 2230 && hci_stack->hci_transport->set_baudrate 2231 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2232 2233 need_addr_change = hci_stack->custom_bd_addr_set 2234 && hci_stack->chipset 2235 && hci_stack->chipset->set_bd_addr_command; 2236 #endif 2237 2238 switch(hci_stack->substate){ 2239 2240 #ifndef HAVE_HOST_CONTROLLER_API 2241 case HCI_INIT_SEND_RESET: 2242 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2243 // fix: just correct substate and behave as command below 2244 2245 /* fall through */ 2246 #endif 2247 2248 case HCI_INIT_W4_SEND_RESET: 2249 btstack_run_loop_remove_timer(&hci_stack->timeout); 2250 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2251 return; 2252 2253 #ifndef HAVE_HOST_CONTROLLER_API 2254 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2255 // for STLC2500D, baud rate change already happened. 2256 // for others, baud rate gets changed now 2257 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2258 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2259 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2260 hci_stack->hci_transport->set_baudrate(baud_rate); 2261 } 2262 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2263 return; 2264 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2265 btstack_run_loop_remove_timer(&hci_stack->timeout); 2266 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2267 return; 2268 case HCI_INIT_W4_CUSTOM_INIT: 2269 // repeat custom init 2270 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2271 return; 2272 #endif 2273 2274 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2275 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2276 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2277 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2278 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2279 return; 2280 } 2281 if (need_addr_change){ 2282 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2283 return; 2284 } 2285 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2286 return; 2287 #ifndef HAVE_HOST_CONTROLLER_API 2288 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2289 if (need_baud_change){ 2290 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2291 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2292 hci_stack->hci_transport->set_baudrate(baud_rate); 2293 } 2294 if (need_addr_change){ 2295 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2296 return; 2297 } 2298 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2299 return; 2300 case HCI_INIT_W4_SET_BD_ADDR: 2301 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2302 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2303 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2304 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2305 return; 2306 } 2307 // skipping st warm boot 2308 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2309 return; 2310 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2311 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2312 return; 2313 #endif 2314 2315 case HCI_INIT_DONE: 2316 // set state if we came here by fall through 2317 hci_stack->substate = HCI_INIT_DONE; 2318 return; 2319 2320 default: 2321 break; 2322 } 2323 hci_initializing_next_state(); 2324 } 2325 2326 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2327 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2328 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2329 // check if we have been aware of the HCI connection 2330 switch (conn->state){ 2331 case SENT_CREATE_CONNECTION: 2332 case RECEIVED_CONNECTION_REQUEST: 2333 break; 2334 default: 2335 return; 2336 } 2337 2338 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2339 bd_addr_t bd_address; 2340 (void)memcpy(&bd_address, conn->address, 6); 2341 2342 #ifdef ENABLE_CLASSIC 2343 // cache needed data 2344 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2345 #endif 2346 2347 // connection failed, remove entry 2348 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2349 btstack_memory_hci_connection_free( conn ); 2350 2351 #ifdef ENABLE_CLASSIC 2352 // notify client if dedicated bonding 2353 if (notify_dedicated_bonding_failed){ 2354 log_info("hci notify_dedicated_bonding_failed"); 2355 hci_emit_dedicated_bonding_result(bd_address, status); 2356 } 2357 2358 // if authentication error, also delete link key 2359 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2360 gap_drop_link_key_for_bd_addr(bd_address); 2361 } 2362 #else 2363 UNUSED(status); 2364 #endif 2365 } 2366 2367 #ifdef ENABLE_CLASSIC 2368 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2369 // SSP Controller 2370 if (features[6] & (1 << 3)){ 2371 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2372 } 2373 // eSCO 2374 if (features[3] & (1<<7)){ 2375 conn->remote_supported_features[0] |= 1; 2376 } 2377 // Extended features 2378 if (features[7] & (1<<7)){ 2379 conn->remote_supported_features[0] |= 2; 2380 } 2381 } 2382 2383 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2384 // SSP Host 2385 if (features[0] & (1 << 0)){ 2386 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2387 } 2388 // SC Host 2389 if (features[0] & (1 << 3)){ 2390 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2391 } 2392 } 2393 2394 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2395 // SC Controller 2396 if (features[1] & (1 << 0)){ 2397 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2398 } 2399 } 2400 2401 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2402 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2403 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2404 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2405 if (conn->bonding_flags & BONDING_DEDICATED){ 2406 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2407 } 2408 } 2409 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2410 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2411 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2412 } 2413 2414 #endif 2415 2416 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2417 // handle BT initialization 2418 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2419 hci_initializing_event_handler(packet, size); 2420 } 2421 2422 // help with BT sleep 2423 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2424 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2425 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2426 hci_initializing_next_state(); 2427 } 2428 } 2429 2430 #ifdef ENABLE_CLASSIC 2431 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2432 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2433 conn->encryption_key_size = encryption_key_size; 2434 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2435 2436 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2437 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2438 conn->bonding_flags &= ~BONDING_DEDICATED; 2439 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2440 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2441 return; 2442 } 2443 2444 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2445 conn->requested_security_level = LEVEL_0; 2446 hci_emit_security_level(conn->con_handle, security_level); 2447 return; 2448 } 2449 2450 // Request remote features if not already done 2451 hci_trigger_remote_features_for_connection(conn); 2452 2453 // Request Authentication if not already done 2454 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2455 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2456 } 2457 #endif 2458 2459 static void hci_store_local_supported_commands(const uint8_t * packet){ 2460 // create mapping table 2461 #define X(name, offset, bit) { offset, bit }, 2462 static struct { 2463 uint8_t byte_offset; 2464 uint8_t bit_position; 2465 } supported_hci_commands_map [] = { 2466 SUPPORTED_HCI_COMMANDS 2467 }; 2468 #undef X 2469 2470 // create names for debug purposes 2471 #ifdef ENABLE_LOG_DEBUG 2472 #define X(name, offset, bit) #name, 2473 static const char * command_names[] = { 2474 SUPPORTED_HCI_COMMANDS 2475 }; 2476 #undef X 2477 #endif 2478 2479 hci_stack->local_supported_commands = 0; 2480 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2481 uint16_t i; 2482 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2483 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2484 #ifdef ENABLE_LOG_DEBUG 2485 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); 2486 #else 2487 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2488 #endif 2489 hci_stack->local_supported_commands |= (1LU << i); 2490 } 2491 } 2492 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2493 } 2494 2495 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2496 UNUSED(size); 2497 2498 uint16_t manufacturer; 2499 #ifdef ENABLE_CLASSIC 2500 hci_con_handle_t handle; 2501 hci_connection_t * conn; 2502 uint8_t status; 2503 #endif 2504 // get num cmd packets - limit to 1 to reduce complexity 2505 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2506 2507 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2508 switch (opcode){ 2509 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2510 if (packet[5]) break; 2511 // terminate, name 248 chars 2512 packet[6+248] = 0; 2513 log_info("local name: %s", &packet[6]); 2514 break; 2515 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2516 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2517 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2518 uint16_t acl_len = little_endian_read_16(packet, 6); 2519 uint16_t sco_len = packet[8]; 2520 2521 // determine usable ACL/SCO payload size 2522 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2523 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2524 2525 hci_stack->acl_packets_total_num = (uint8_t) little_endian_read_16(packet, 9); 2526 hci_stack->sco_packets_total_num = (uint8_t) little_endian_read_16(packet, 11); 2527 2528 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2529 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2530 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2531 } 2532 break; 2533 case HCI_OPCODE_HCI_READ_RSSI: 2534 if (packet[5] == ERROR_CODE_SUCCESS){ 2535 uint8_t event[5]; 2536 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2537 event[1] = 3; 2538 (void)memcpy(&event[2], &packet[6], 3); 2539 hci_emit_event(event, sizeof(event), 1); 2540 } 2541 break; 2542 #ifdef ENABLE_BLE 2543 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2544 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2545 hci_stack->le_iso_packets_total_num = packet[11]; 2546 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2547 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2548 2549 /* fall through */ 2550 2551 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2552 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2553 hci_stack->le_acl_packets_total_num = packet[8]; 2554 // determine usable ACL payload size 2555 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2556 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2557 } 2558 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); 2559 break; 2560 #endif 2561 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2562 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2563 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2564 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2565 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); 2566 break; 2567 #endif 2568 #ifdef ENABLE_LE_CENTRAL 2569 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2570 hci_stack->le_whitelist_capacity = packet[6]; 2571 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2572 break; 2573 #endif 2574 #ifdef ENABLE_LE_PERIPHERAL 2575 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2576 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2577 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2578 break; 2579 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2580 if (hci_stack->le_advertising_set_in_current_command != 0) { 2581 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2582 hci_stack->le_advertising_set_in_current_command = 0; 2583 if (advertising_set == NULL) break; 2584 uint8_t adv_status = packet[6]; 2585 uint8_t tx_power = packet[7]; 2586 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 }; 2587 if (adv_status == 0){ 2588 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2589 } 2590 hci_emit_event(event, sizeof(event), 1); 2591 } 2592 break; 2593 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2594 if (hci_stack->le_advertising_set_in_current_command != 0) { 2595 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2596 hci_stack->le_advertising_set_in_current_command = 0; 2597 if (advertising_set == NULL) break; 2598 uint8_t adv_status = packet[5]; 2599 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2600 if (adv_status == 0){ 2601 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2602 } 2603 hci_emit_event(event, sizeof(event), 1); 2604 } 2605 break; 2606 #endif 2607 #endif 2608 case HCI_OPCODE_HCI_READ_BD_ADDR: 2609 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2610 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)); 2611 #ifdef ENABLE_CLASSIC 2612 if (hci_stack->link_key_db){ 2613 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2614 } 2615 #endif 2616 break; 2617 #ifdef ENABLE_CLASSIC 2618 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2619 hci_emit_discoverable_enabled(hci_stack->discoverable); 2620 break; 2621 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2622 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2623 if (status == ERROR_CODE_SUCCESS) { 2624 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2625 } else { 2626 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2627 } 2628 break; 2629 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2630 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2631 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2632 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2633 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2634 hci_emit_event(event, sizeof(event), 1); 2635 } 2636 break; 2637 #endif 2638 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2639 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2640 2641 #ifdef ENABLE_CLASSIC 2642 // determine usable ACL packet types based on host buffer size and supported features 2643 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2644 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2645 #endif 2646 // Classic/LE 2647 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2648 break; 2649 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2650 manufacturer = little_endian_read_16(packet, 10); 2651 // map Cypress to Broadcom 2652 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2653 log_info("Treat Cypress as Broadcom"); 2654 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2655 little_endian_store_16(packet, 10, manufacturer); 2656 } 2657 hci_stack->manufacturer = manufacturer; 2658 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2659 break; 2660 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2661 hci_store_local_supported_commands(packet); 2662 break; 2663 #ifdef ENABLE_CLASSIC 2664 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2665 if (packet[5]) return; 2666 hci_stack->synchronous_flow_control_enabled = 1; 2667 break; 2668 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2669 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2670 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2671 conn = hci_connection_for_handle(handle); 2672 if (conn != NULL) { 2673 uint8_t key_size = 0; 2674 if (status == 0){ 2675 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2676 log_info("Handle %04x key Size: %u", handle, key_size); 2677 } else { 2678 key_size = 1; 2679 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2680 } 2681 hci_handle_read_encryption_key_size_complete(conn, key_size); 2682 } 2683 break; 2684 // assert pairing complete event is emitted. 2685 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2686 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2687 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2688 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2689 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2690 // lookup connection by gap pairing addr 2691 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2692 if (conn == NULL) break; 2693 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2694 break; 2695 2696 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2697 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2698 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2699 uint8_t event[67]; 2700 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2701 event[1] = 65; 2702 (void)memset(&event[2], 0, 65); 2703 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2704 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2705 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2706 event[2] = 3; 2707 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2708 } else { 2709 event[2] = 1; 2710 } 2711 } 2712 hci_emit_event(event, sizeof(event), 0); 2713 break; 2714 } 2715 2716 // note: only needed if user does not provide OOB data 2717 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2718 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2719 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2720 if (conn == NULL) break; 2721 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2722 break; 2723 #endif 2724 #endif 2725 #ifdef ENABLE_BLE 2726 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2727 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2728 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2729 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2730 if (status != ERROR_CODE_SUCCESS){ 2731 hci_iso_stream_requested_finalize(); 2732 } 2733 break; 2734 #endif 2735 #endif 2736 default: 2737 break; 2738 } 2739 } 2740 2741 #ifdef ENABLE_BLE 2742 static void event_handle_le_connection_complete(const uint8_t * packet){ 2743 bd_addr_t addr; 2744 bd_addr_type_t addr_type; 2745 hci_connection_t * conn; 2746 2747 // Connection management 2748 reverse_bd_addr(&packet[8], addr); 2749 addr_type = (bd_addr_type_t)packet[7]; 2750 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2751 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2752 2753 #ifdef ENABLE_LE_CENTRAL 2754 // handle error: error is reported only to the initiator -> outgoing connection 2755 if (packet[3]){ 2756 2757 // handle cancelled outgoing connection 2758 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2759 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2760 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2761 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2762 // reset state 2763 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2764 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2765 // get outgoing connection conn struct for direct connect 2766 conn = gap_get_outgoing_connection(); 2767 } 2768 2769 // outgoing le connection establishment is done 2770 if (conn){ 2771 // remove entry 2772 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2773 btstack_memory_hci_connection_free( conn ); 2774 } 2775 return; 2776 } 2777 #endif 2778 2779 // on success, both hosts receive connection complete event 2780 if (packet[6] == HCI_ROLE_MASTER){ 2781 #ifdef ENABLE_LE_CENTRAL 2782 // if we're master on an le connection, it was an outgoing connection and we're done with it 2783 // note: no hci_connection_t object exists yet for connect with whitelist 2784 if (hci_is_le_connection_type(addr_type)){ 2785 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2786 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2787 } 2788 #endif 2789 } else { 2790 #ifdef ENABLE_LE_PERIPHERAL 2791 // if we're slave, it was an incoming connection, advertisements have stopped 2792 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2793 #endif 2794 } 2795 2796 // LE connections are auto-accepted, so just create a connection if there isn't one already 2797 if (!conn){ 2798 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2799 } 2800 2801 // no memory, sorry. 2802 if (!conn){ 2803 return; 2804 } 2805 2806 conn->state = OPEN; 2807 conn->role = packet[6]; 2808 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2809 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2810 2811 #ifdef ENABLE_LE_PERIPHERAL 2812 if (packet[6] == HCI_ROLE_SLAVE){ 2813 hci_update_advertisements_enabled_for_current_roles(); 2814 } 2815 #endif 2816 2817 // init unenhanced att bearer mtu 2818 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2819 conn->att_connection.mtu_exchanged = false; 2820 2821 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2822 2823 // restart timer 2824 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2825 // btstack_run_loop_add_timer(&conn->timeout); 2826 2827 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2828 2829 hci_emit_nr_connections_changed(); 2830 } 2831 #endif 2832 2833 #ifdef ENABLE_CLASSIC 2834 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){ 2835 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2836 // LEVEL_4 is tested by l2cap 2837 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2838 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2839 if (level >= LEVEL_3){ 2840 // MITM not possible without keyboard or display 2841 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2842 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2843 2844 // MITM possible if one side has keyboard and the other has keyboard or display 2845 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2846 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2847 2848 // MITM not possible if one side has only display and other side has no keyboard 2849 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2850 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2851 } 2852 // LEVEL 2 requires SSP, which is a given 2853 return true; 2854 } 2855 2856 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2857 uint16_t i; 2858 for (i=0; i < size ; i++){ 2859 if (data[i] != 0) { 2860 return false; 2861 } 2862 } 2863 return true; 2864 } 2865 2866 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2867 // get requested security level 2868 gap_security_level_t requested_security_level = conn->requested_security_level; 2869 if (hci_stack->gap_secure_connections_only_mode){ 2870 requested_security_level = LEVEL_4; 2871 } 2872 2873 // assess security: LEVEL 4 requires SC 2874 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2875 if ((requested_security_level == LEVEL_4) && 2876 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2877 !hci_remote_sc_enabled(conn)){ 2878 log_info("Level 4 required, but SC not supported -> abort"); 2879 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2880 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2881 return; 2882 } 2883 2884 // assess security based on io capabilities 2885 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2886 // responder: fully validate io caps of both sides as well as OOB data 2887 bool security_possible = false; 2888 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2889 2890 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2891 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2892 // so we merge the OOB data availability 2893 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2894 if (conn->classic_oob_c_192 != NULL){ 2895 have_oob_data |= 1; 2896 } 2897 if (conn->classic_oob_c_256 != NULL){ 2898 have_oob_data |= 2; 2899 } 2900 // for up to Level 3, either P-192 as well as P-256 will do 2901 // 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 2902 // if remote does not SC, we should not receive P-256 data either 2903 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2904 security_possible = true; 2905 } 2906 // for Level 4, P-256 is needed 2907 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2908 security_possible = true; 2909 } 2910 #endif 2911 2912 if (security_possible == false){ 2913 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2914 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2915 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2916 return; 2917 } 2918 } else { 2919 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2920 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2921 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2922 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2923 log_info("Level 3+ required, but no input/output -> abort"); 2924 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2925 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2926 return; 2927 } 2928 #endif 2929 #endif 2930 } 2931 2932 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2933 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2934 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2935 } else { 2936 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2937 } 2938 #endif 2939 } 2940 2941 #endif 2942 2943 static void event_handler(uint8_t *packet, uint16_t size){ 2944 2945 uint16_t event_length = packet[1]; 2946 2947 // assert packet is complete 2948 if (size != (event_length + 2u)){ 2949 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2950 return; 2951 } 2952 2953 bd_addr_type_t addr_type; 2954 hci_con_handle_t handle; 2955 hci_connection_t * conn; 2956 int i; 2957 int create_connection_cmd; 2958 2959 #ifdef ENABLE_CLASSIC 2960 hci_link_type_t link_type; 2961 bd_addr_t addr; 2962 #endif 2963 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2964 hci_iso_stream_t * iso_stream; 2965 #endif 2966 2967 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2968 2969 switch (hci_event_packet_get_type(packet)) { 2970 2971 case HCI_EVENT_COMMAND_COMPLETE: 2972 handle_command_complete_event(packet, size); 2973 break; 2974 2975 case HCI_EVENT_COMMAND_STATUS: 2976 // get num cmd packets - limit to 1 to reduce complexity 2977 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2978 2979 // check command status to detected failed outgoing connections 2980 create_connection_cmd = 0; 2981 #ifdef ENABLE_CLASSIC 2982 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2983 create_connection_cmd = 1; 2984 } 2985 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2986 create_connection_cmd = 1; 2987 } 2988 #endif 2989 #ifdef ENABLE_LE_CENTRAL 2990 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2991 create_connection_cmd = 1; 2992 } 2993 #endif 2994 if (create_connection_cmd) { 2995 uint8_t status = hci_event_command_status_get_status(packet); 2996 addr_type = hci_stack->outgoing_addr_type; 2997 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2998 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); 2999 3000 // reset outgoing address info 3001 memset(hci_stack->outgoing_addr, 0, 6); 3002 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 3003 3004 // on error 3005 if (status != ERROR_CODE_SUCCESS){ 3006 #ifdef ENABLE_LE_CENTRAL 3007 if (hci_is_le_connection_type(addr_type)){ 3008 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3009 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3010 } 3011 #endif 3012 // error => outgoing connection failed 3013 if (conn != NULL){ 3014 hci_handle_connection_failed(conn, status); 3015 } 3016 } 3017 } 3018 3019 #ifdef ENABLE_CLASSIC 3020 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)){ 3021 uint8_t status = hci_event_command_status_get_status(packet); 3022 log_info("command status (inquiry), status %x", status); 3023 if (status == ERROR_CODE_SUCCESS) { 3024 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3025 } else { 3026 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3027 } 3028 } 3029 #endif /* ENABLE_CLASSIC */ 3030 #ifdef ENABLE_BLE 3031 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3032 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_cis) || HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_accept_cis_request)){ 3033 uint8_t status = hci_event_command_status_get_status(packet); 3034 if (status == ERROR_CODE_SUCCESS){ 3035 hci_iso_stream_requested_confirm(); 3036 } else { 3037 hci_iso_stream_requested_finalize(); 3038 } 3039 } 3040 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 3041 #endif /* ENABLE_BLE */ 3042 break; 3043 3044 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3045 if (size < 3) return; 3046 uint16_t num_handles = packet[2]; 3047 if (size != (3u + num_handles * 4u)) return; 3048 uint16_t offset = 3; 3049 for (i=0; i<num_handles;i++){ 3050 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3051 offset += 2u; 3052 uint16_t num_packets = little_endian_read_16(packet, offset); 3053 offset += 2u; 3054 3055 conn = hci_connection_for_handle(handle); 3056 if (!conn){ 3057 log_error("hci_number_completed_packet lists unused con handle %u", handle); 3058 continue; 3059 } 3060 3061 if (conn->num_packets_sent >= num_packets){ 3062 conn->num_packets_sent -= num_packets; 3063 } else { 3064 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3065 conn->num_packets_sent = 0; 3066 } 3067 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3068 3069 #ifdef ENABLE_CLASSIC 3070 // For SCO, we do the can_send_now_check here 3071 hci_notify_if_sco_can_send_now(); 3072 #endif 3073 } 3074 break; 3075 } 3076 3077 #ifdef ENABLE_CLASSIC 3078 case HCI_EVENT_FLUSH_OCCURRED: 3079 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3080 handle = hci_event_flush_occurred_get_handle(packet); 3081 conn = hci_connection_for_handle(handle); 3082 if (conn) { 3083 log_info("Flush occurred, disconnect 0x%04x", handle); 3084 conn->state = SEND_DISCONNECT; 3085 } 3086 break; 3087 3088 case HCI_EVENT_INQUIRY_COMPLETE: 3089 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3090 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3091 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3092 hci_emit_event(event, sizeof(event), 1); 3093 } 3094 break; 3095 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3096 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3097 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3098 } 3099 break; 3100 case HCI_EVENT_CONNECTION_REQUEST: 3101 reverse_bd_addr(&packet[2], addr); 3102 link_type = (hci_link_type_t) packet[11]; 3103 3104 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3105 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3106 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3107 bd_addr_copy(hci_stack->decline_addr, addr); 3108 break; 3109 } 3110 3111 if (hci_stack->gap_classic_accept_callback != NULL){ 3112 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3113 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3114 bd_addr_copy(hci_stack->decline_addr, addr); 3115 break; 3116 } 3117 } 3118 3119 // TODO: eval COD 8-10 3120 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3121 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3122 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3123 if (!conn) { 3124 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3125 } 3126 if (!conn) { 3127 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3128 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3129 bd_addr_copy(hci_stack->decline_addr, addr); 3130 hci_run(); 3131 // avoid event to higher layer 3132 return; 3133 } 3134 conn->role = HCI_ROLE_SLAVE; 3135 conn->state = RECEIVED_CONNECTION_REQUEST; 3136 // store info about eSCO 3137 if (link_type == HCI_LINK_TYPE_ESCO){ 3138 conn->remote_supported_features[0] |= 1; 3139 } 3140 hci_run(); 3141 break; 3142 3143 case HCI_EVENT_CONNECTION_COMPLETE: 3144 // Connection management 3145 reverse_bd_addr(&packet[5], addr); 3146 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3147 addr_type = BD_ADDR_TYPE_ACL; 3148 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3149 if (conn) { 3150 if (!packet[2]){ 3151 conn->state = OPEN; 3152 conn->con_handle = little_endian_read_16(packet, 3); 3153 3154 // trigger write supervision timeout if we're master 3155 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3156 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3157 } 3158 3159 // trigger write automatic flush timeout 3160 if (hci_stack->automatic_flush_timeout != 0){ 3161 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3162 } 3163 3164 // restart timer 3165 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3166 btstack_run_loop_add_timer(&conn->timeout); 3167 3168 // trigger remote features for dedicated bonding 3169 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3170 hci_trigger_remote_features_for_connection(conn); 3171 } 3172 3173 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3174 3175 hci_emit_nr_connections_changed(); 3176 } else { 3177 // connection failed 3178 hci_handle_connection_failed(conn, packet[2]); 3179 } 3180 } 3181 break; 3182 3183 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3184 reverse_bd_addr(&packet[5], addr); 3185 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3186 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3187 if (packet[2]){ 3188 // connection failed 3189 if (conn){ 3190 hci_handle_connection_failed(conn, packet[2]); 3191 } 3192 break; 3193 } 3194 if (!conn) { 3195 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3196 } 3197 if (!conn) { 3198 break; 3199 } 3200 conn->state = OPEN; 3201 conn->con_handle = little_endian_read_16(packet, 3); 3202 3203 #ifdef ENABLE_SCO_OVER_HCI 3204 // update SCO 3205 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3206 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3207 } 3208 // trigger can send now 3209 if (hci_have_usb_transport()){ 3210 hci_stack->sco_can_send_now = true; 3211 } 3212 #endif 3213 #ifdef HAVE_SCO_TRANSPORT 3214 // configure sco transport 3215 if (hci_stack->sco_transport != NULL){ 3216 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3217 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3218 } 3219 #endif 3220 break; 3221 3222 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3223 handle = little_endian_read_16(packet, 3); 3224 conn = hci_connection_for_handle(handle); 3225 if (!conn) break; 3226 if (!packet[2]){ 3227 const uint8_t * features = &packet[5]; 3228 hci_handle_remote_features_page_0(conn, features); 3229 3230 // read extended features if possible 3231 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3232 && ((conn->remote_supported_features[0] & 2) != 0)) { 3233 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3234 break; 3235 } 3236 } 3237 hci_handle_remote_features_received(conn); 3238 break; 3239 3240 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3241 handle = little_endian_read_16(packet, 3); 3242 conn = hci_connection_for_handle(handle); 3243 if (!conn) break; 3244 // status = ok, page = 1 3245 if (!packet[2]) { 3246 uint8_t page_number = packet[5]; 3247 uint8_t maximum_page_number = packet[6]; 3248 const uint8_t * features = &packet[7]; 3249 bool done = false; 3250 switch (page_number){ 3251 case 1: 3252 hci_handle_remote_features_page_1(conn, features); 3253 if (maximum_page_number >= 2){ 3254 // get Secure Connections (Controller) from Page 2 if available 3255 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3256 } else { 3257 // otherwise, assume SC (Controller) == SC (Host) 3258 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3259 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3260 } 3261 done = true; 3262 } 3263 break; 3264 case 2: 3265 hci_handle_remote_features_page_2(conn, features); 3266 done = true; 3267 break; 3268 default: 3269 break; 3270 } 3271 if (!done) break; 3272 } 3273 hci_handle_remote_features_received(conn); 3274 break; 3275 3276 case HCI_EVENT_LINK_KEY_REQUEST: 3277 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3278 hci_event_link_key_request_get_bd_addr(packet, addr); 3279 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3280 if (!conn) break; 3281 3282 // lookup link key in db if not cached 3283 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3284 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3285 } 3286 3287 // response sent by hci_run() 3288 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3289 #endif 3290 break; 3291 3292 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3293 hci_event_link_key_request_get_bd_addr(packet, addr); 3294 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3295 if (!conn) break; 3296 3297 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3298 3299 // CVE-2020-26555: ignore NULL link key 3300 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3301 if (btstack_is_null(&packet[8], 16)) break; 3302 3303 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3304 // Change Connection Encryption keeps link key type 3305 if (link_key_type != CHANGED_COMBINATION_KEY){ 3306 conn->link_key_type = link_key_type; 3307 } 3308 3309 // cache link key. link keys stored in little-endian format for legacy reasons 3310 memcpy(&conn->link_key, &packet[8], 16); 3311 3312 // only store link key: 3313 // - if bondable enabled 3314 if (hci_stack->bondable == false) break; 3315 // - if security level sufficient 3316 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3317 // - for SSP, also check if remote side requested bonding as well 3318 if (conn->link_key_type != COMBINATION_KEY){ 3319 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3320 if (!remote_bonding){ 3321 break; 3322 } 3323 } 3324 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3325 break; 3326 } 3327 3328 case HCI_EVENT_PIN_CODE_REQUEST: 3329 hci_event_pin_code_request_get_bd_addr(packet, addr); 3330 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3331 if (!conn) break; 3332 3333 hci_pairing_started(conn, false); 3334 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3335 if (!hci_stack->bondable ){ 3336 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3337 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3338 hci_run(); 3339 return; 3340 } 3341 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3342 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3343 log_info("Level 4 required, but SC not supported -> abort"); 3344 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3345 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3346 hci_run(); 3347 return; 3348 } 3349 break; 3350 3351 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3352 hci_event_io_capability_response_get_bd_addr(packet, addr); 3353 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3354 if (!conn) break; 3355 3356 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3357 hci_pairing_started(conn, true); 3358 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3359 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3360 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3361 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3362 #endif 3363 break; 3364 3365 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3366 hci_event_io_capability_response_get_bd_addr(packet, addr); 3367 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3368 if (!conn) break; 3369 3370 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3371 hci_connection_timestamp(conn); 3372 hci_pairing_started(conn, true); 3373 break; 3374 3375 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3376 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3377 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3378 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3379 if (!conn) break; 3380 3381 hci_connection_timestamp(conn); 3382 3383 hci_pairing_started(conn, true); 3384 3385 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3386 break; 3387 #endif 3388 3389 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3390 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3391 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3392 if (!conn) break; 3393 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3394 if (hci_stack->ssp_auto_accept){ 3395 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3396 }; 3397 } else { 3398 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3399 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3400 // don't forward event to app 3401 hci_run(); 3402 return; 3403 } 3404 break; 3405 3406 case HCI_EVENT_USER_PASSKEY_REQUEST: 3407 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3408 if (hci_stack->ssp_auto_accept){ 3409 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3410 }; 3411 break; 3412 3413 case HCI_EVENT_MODE_CHANGE: 3414 handle = hci_event_mode_change_get_handle(packet); 3415 conn = hci_connection_for_handle(handle); 3416 if (!conn) break; 3417 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3418 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3419 break; 3420 #endif 3421 3422 case HCI_EVENT_ENCRYPTION_CHANGE: 3423 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3424 handle = hci_event_encryption_change_get_connection_handle(packet); 3425 conn = hci_connection_for_handle(handle); 3426 if (!conn) break; 3427 if (hci_event_encryption_change_get_status(packet) == 0u) { 3428 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3429 if (encryption_enabled){ 3430 if (hci_is_le_connection(conn)){ 3431 // For LE, we accept connection as encrypted 3432 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3433 } 3434 #ifdef ENABLE_CLASSIC 3435 else { 3436 3437 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3438 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3439 bool connected_uses_aes_ccm = encryption_enabled == 2; 3440 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3441 log_info("SC during pairing, but only E0 now -> abort"); 3442 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3443 break; 3444 } 3445 3446 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3447 if (connected_uses_aes_ccm){ 3448 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3449 } 3450 3451 #ifdef ENABLE_TESTING_SUPPORT 3452 // work around for issue with PTS dongle 3453 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3454 #endif 3455 // validate encryption key size 3456 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3457 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3458 // already got encryption key size 3459 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3460 } else { 3461 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3462 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3463 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3464 } else { 3465 // if not, pretend everything is perfect 3466 hci_handle_read_encryption_key_size_complete(conn, 16); 3467 } 3468 } 3469 } 3470 #endif 3471 } else { 3472 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3473 } 3474 } else { 3475 uint8_t status = hci_event_encryption_change_get_status(packet); 3476 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3477 conn->bonding_flags &= ~BONDING_DEDICATED; 3478 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3479 conn->bonding_status = status; 3480 } 3481 } 3482 3483 break; 3484 3485 #ifdef ENABLE_CLASSIC 3486 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3487 handle = hci_event_authentication_complete_get_connection_handle(packet); 3488 conn = hci_connection_for_handle(handle); 3489 if (!conn) break; 3490 3491 // clear authentication active flag 3492 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3493 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3494 3495 // authenticated only if auth status == 0 3496 if (hci_event_authentication_complete_get_status(packet) == 0){ 3497 // authenticated 3498 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3499 3500 // If not already encrypted, start encryption 3501 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3502 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3503 break; 3504 } 3505 } 3506 3507 // emit updated security level 3508 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3509 break; 3510 3511 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3512 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3513 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3514 if (!conn) break; 3515 3516 // treat successfully paired connection as authenticated 3517 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3518 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3519 } 3520 3521 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3522 break; 3523 #endif 3524 3525 // HCI_EVENT_DISCONNECTION_COMPLETE 3526 // has been split, to first notify stack before shutting connection down 3527 // see end of function, too. 3528 case HCI_EVENT_DISCONNECTION_COMPLETE: 3529 if (packet[2]) break; // status != 0 3530 handle = little_endian_read_16(packet, 3); 3531 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3532 if (hci_stack->acl_fragmentation_total_size > 0u) { 3533 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3534 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3535 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3536 hci_stack->acl_fragmentation_total_size = 0; 3537 hci_stack->acl_fragmentation_pos = 0; 3538 if (release_buffer){ 3539 hci_release_packet_buffer(); 3540 } 3541 } 3542 } 3543 3544 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3545 // finalize iso stream if handle matches 3546 iso_stream = hci_iso_stream_for_cis_handle(handle); 3547 if (iso_stream != NULL){ 3548 hci_iso_stream_finalize(iso_stream); 3549 break; 3550 } 3551 #endif 3552 3553 conn = hci_connection_for_handle(handle); 3554 if (!conn) break; 3555 #ifdef ENABLE_CLASSIC 3556 // pairing failed if it was ongoing 3557 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3558 #endif 3559 3560 // emit dedicatd bonding event 3561 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3562 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3563 } 3564 3565 // mark connection for shutdown, stop timers, reset state 3566 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3567 hci_connection_stop_timer(conn); 3568 hci_connection_init(conn); 3569 3570 #ifdef ENABLE_BLE 3571 #ifdef ENABLE_LE_PERIPHERAL 3572 // re-enable advertisements for le connections if active 3573 if (hci_is_le_connection(conn)){ 3574 hci_update_advertisements_enabled_for_current_roles(); 3575 } 3576 #endif 3577 #endif 3578 break; 3579 3580 case HCI_EVENT_HARDWARE_ERROR: 3581 log_error("Hardware Error: 0x%02x", packet[2]); 3582 if (hci_stack->hardware_error_callback){ 3583 (*hci_stack->hardware_error_callback)(packet[2]); 3584 } else { 3585 // if no special requests, just reboot stack 3586 hci_power_control_off(); 3587 hci_power_control_on(); 3588 } 3589 break; 3590 3591 #ifdef ENABLE_CLASSIC 3592 case HCI_EVENT_ROLE_CHANGE: 3593 if (packet[2]) break; // status != 0 3594 reverse_bd_addr(&packet[3], addr); 3595 addr_type = BD_ADDR_TYPE_ACL; 3596 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3597 if (!conn) break; 3598 conn->role = packet[9]; 3599 break; 3600 #endif 3601 3602 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3603 // release packet buffer only for asynchronous transport and if there are not further fragements 3604 if (hci_transport_synchronous()) { 3605 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3606 return; // instead of break: to avoid re-entering hci_run() 3607 } 3608 hci_stack->acl_fragmentation_tx_active = 0; 3609 if (hci_stack->acl_fragmentation_total_size) break; 3610 hci_release_packet_buffer(); 3611 3612 // L2CAP receives this event via the hci_emit_event below 3613 3614 #ifdef ENABLE_CLASSIC 3615 // For SCO, we do the can_send_now_check here 3616 hci_notify_if_sco_can_send_now(); 3617 #endif 3618 break; 3619 3620 #ifdef ENABLE_CLASSIC 3621 case HCI_EVENT_SCO_CAN_SEND_NOW: 3622 // For SCO, we do the can_send_now_check here 3623 hci_stack->sco_can_send_now = true; 3624 hci_notify_if_sco_can_send_now(); 3625 return; 3626 3627 // explode inquriy results for easier consumption 3628 case HCI_EVENT_INQUIRY_RESULT: 3629 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3630 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3631 gap_inquiry_explode(packet, size); 3632 break; 3633 #endif 3634 3635 #ifdef ENABLE_BLE 3636 case HCI_EVENT_LE_META: 3637 switch (packet[2]){ 3638 #ifdef ENABLE_LE_CENTRAL 3639 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3640 if (!hci_stack->le_scanning_enabled) break; 3641 le_handle_advertisement_report(packet, size); 3642 break; 3643 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3644 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3645 if (!hci_stack->le_scanning_enabled) break; 3646 le_handle_extended_advertisement_report(packet, size); 3647 break; 3648 #endif 3649 #endif 3650 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3651 event_handle_le_connection_complete(packet); 3652 break; 3653 3654 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3655 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3656 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3657 conn = hci_connection_for_handle(handle); 3658 if (!conn) break; 3659 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3660 break; 3661 3662 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3663 // connection 3664 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3665 conn = hci_connection_for_handle(handle); 3666 if (conn) { 3667 // read arguments 3668 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3669 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3670 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3671 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3672 3673 // validate against current connection parameter range 3674 le_connection_parameter_range_t existing_range; 3675 gap_get_connection_parameter_range(&existing_range); 3676 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3677 if (update_parameter){ 3678 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3679 conn->le_conn_interval_min = le_conn_interval_min; 3680 conn->le_conn_interval_max = le_conn_interval_max; 3681 conn->le_conn_latency = le_conn_latency; 3682 conn->le_supervision_timeout = le_supervision_timeout; 3683 } else { 3684 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3685 } 3686 } 3687 break; 3688 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3689 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3690 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3691 conn = hci_connection_for_handle(handle); 3692 if (conn) { 3693 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3694 } 3695 break; 3696 #endif 3697 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3698 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 3699 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 3700 iso_stream = hci_iso_stream_for_cis_handle(handle); 3701 if (iso_stream){ 3702 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 3703 if (status == ERROR_CODE_SUCCESS){ 3704 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3705 } else { 3706 hci_iso_stream_finalize(iso_stream); 3707 } 3708 } 3709 #endif 3710 default: 3711 break; 3712 } 3713 break; 3714 #endif 3715 case HCI_EVENT_VENDOR_SPECIFIC: 3716 // Vendor specific commands often create vendor specific event instead of num completed packets 3717 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3718 switch (hci_stack->manufacturer){ 3719 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3720 hci_stack->num_cmd_packets = 1; 3721 break; 3722 default: 3723 break; 3724 } 3725 break; 3726 default: 3727 break; 3728 } 3729 3730 handle_event_for_current_stack_state(packet, size); 3731 3732 // notify upper stack 3733 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3734 3735 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3736 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3737 handle = little_endian_read_16(packet, 3); 3738 hci_connection_t * aConn = hci_connection_for_handle(handle); 3739 // discard connection if app did not trigger a reconnect in the event handler 3740 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3741 hci_shutdown_connection(aConn); 3742 } 3743 } 3744 3745 // execute main loop 3746 hci_run(); 3747 } 3748 3749 #ifdef ENABLE_CLASSIC 3750 3751 #ifdef ENABLE_SCO_OVER_HCI 3752 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3753 static void sco_schedule_tx(hci_connection_t * conn); 3754 3755 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3756 log_debug("SCO TX Timeout"); 3757 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3758 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3759 if (!conn) return; 3760 3761 // trigger send 3762 conn->sco_tx_ready = 1; 3763 // extra packet if CVSD but SCO buffer is too short 3764 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3765 conn->sco_tx_ready++; 3766 } 3767 hci_notify_if_sco_can_send_now(); 3768 } 3769 3770 3771 #define SCO_TX_AFTER_RX_MS (6) 3772 3773 static void sco_schedule_tx(hci_connection_t * conn){ 3774 3775 uint32_t now = btstack_run_loop_get_time_ms(); 3776 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3777 int time_delta_ms = sco_tx_ms - now; 3778 3779 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3780 3781 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3782 btstack_run_loop_remove_timer(timer); 3783 btstack_run_loop_set_timer(timer, time_delta_ms); 3784 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3785 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3786 btstack_run_loop_add_timer(timer); 3787 } 3788 #endif 3789 3790 static void sco_handler(uint8_t * packet, uint16_t size){ 3791 // lookup connection struct 3792 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3793 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3794 if (!conn) return; 3795 3796 #ifdef ENABLE_SCO_OVER_HCI 3797 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3798 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3799 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3800 packet[2] = 0x3c; 3801 memmove(&packet[3], &packet[23], 63); 3802 size = 63; 3803 } 3804 } 3805 3806 if (hci_have_usb_transport()){ 3807 // Nothing to do 3808 } else { 3809 // 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); 3810 if (hci_stack->synchronous_flow_control_enabled == 0){ 3811 uint32_t now = btstack_run_loop_get_time_ms(); 3812 3813 if (!conn->sco_rx_valid){ 3814 // ignore first 10 packets 3815 conn->sco_rx_count++; 3816 // log_debug("sco rx count %u", conn->sco_rx_count); 3817 if (conn->sco_rx_count == 10) { 3818 // use first timestamp as is and pretent it just started 3819 conn->sco_rx_ms = now; 3820 conn->sco_rx_valid = 1; 3821 conn->sco_rx_count = 0; 3822 sco_schedule_tx(conn); 3823 } 3824 } else { 3825 // track expected arrival timme 3826 conn->sco_rx_count++; 3827 conn->sco_rx_ms += 7; 3828 int delta = (int32_t) (now - conn->sco_rx_ms); 3829 if (delta > 0){ 3830 conn->sco_rx_ms++; 3831 } 3832 // log_debug("sco rx %u", conn->sco_rx_ms); 3833 sco_schedule_tx(conn); 3834 } 3835 } 3836 } 3837 #endif 3838 3839 // deliver to app 3840 if (hci_stack->sco_packet_handler) { 3841 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3842 } 3843 3844 #ifdef HAVE_SCO_TRANSPORT 3845 // We can send one packet for each received packet 3846 conn->sco_tx_ready++; 3847 hci_notify_if_sco_can_send_now(); 3848 #endif 3849 3850 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3851 conn->num_packets_completed++; 3852 hci_stack->host_completed_packets = 1; 3853 hci_run(); 3854 #endif 3855 } 3856 #endif 3857 3858 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3859 hci_dump_packet(packet_type, 1, packet, size); 3860 switch (packet_type) { 3861 case HCI_EVENT_PACKET: 3862 event_handler(packet, size); 3863 break; 3864 case HCI_ACL_DATA_PACKET: 3865 acl_handler(packet, size); 3866 break; 3867 #ifdef ENABLE_CLASSIC 3868 case HCI_SCO_DATA_PACKET: 3869 sco_handler(packet, size); 3870 break; 3871 #endif 3872 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3873 case HCI_ISO_DATA_PACKET: 3874 hci_iso_packet_handler(packet, size); 3875 break; 3876 #endif 3877 default: 3878 break; 3879 } 3880 } 3881 3882 /** 3883 * @brief Add event packet handler. 3884 */ 3885 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3886 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3887 } 3888 3889 /** 3890 * @brief Remove event packet handler. 3891 */ 3892 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3893 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3894 } 3895 3896 /** Register HCI packet handlers */ 3897 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3898 hci_stack->acl_packet_handler = handler; 3899 } 3900 3901 #ifdef ENABLE_CLASSIC 3902 /** 3903 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3904 */ 3905 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3906 hci_stack->sco_packet_handler = handler; 3907 } 3908 #endif 3909 3910 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3911 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 3912 hci_stack->iso_packet_handler = handler; 3913 } 3914 #endif 3915 3916 static void hci_state_reset(void){ 3917 // no connections yet 3918 hci_stack->connections = NULL; 3919 3920 // keep discoverable/connectable as this has been requested by the client(s) 3921 // hci_stack->discoverable = 0; 3922 // hci_stack->connectable = 0; 3923 // hci_stack->bondable = 1; 3924 // hci_stack->own_addr_type = 0; 3925 3926 // buffer is free 3927 hci_stack->hci_packet_buffer_reserved = false; 3928 3929 // no pending cmds 3930 hci_stack->decline_reason = 0; 3931 3932 hci_stack->secure_connections_active = false; 3933 3934 #ifdef ENABLE_CLASSIC 3935 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3936 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3937 3938 hci_stack->gap_tasks_classic = 3939 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3940 GAP_TASK_SET_CLASS_OF_DEVICE | 3941 GAP_TASK_SET_LOCAL_NAME | 3942 GAP_TASK_SET_EIR_DATA | 3943 GAP_TASK_WRITE_SCAN_ENABLE | 3944 GAP_TASK_WRITE_PAGE_TIMEOUT; 3945 #endif 3946 3947 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3948 hci_stack->classic_read_local_oob_data = false; 3949 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3950 #endif 3951 3952 // LE 3953 #ifdef ENABLE_BLE 3954 memset(hci_stack->le_random_address, 0, 6); 3955 hci_stack->le_random_address_set = 0; 3956 #endif 3957 #ifdef ENABLE_LE_CENTRAL 3958 hci_stack->le_scanning_active = false; 3959 hci_stack->le_scanning_param_update = true; 3960 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3961 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3962 hci_stack->le_whitelist_capacity = 0; 3963 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3964 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 3965 #endif 3966 #endif 3967 #ifdef ENABLE_LE_PERIPHERAL 3968 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3969 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3970 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3971 } 3972 if (hci_stack->le_advertisements_data != NULL){ 3973 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3974 } 3975 #endif 3976 } 3977 3978 #ifdef ENABLE_CLASSIC 3979 /** 3980 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3981 */ 3982 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3983 // store and open remote device db 3984 hci_stack->link_key_db = link_key_db; 3985 if (hci_stack->link_key_db) { 3986 hci_stack->link_key_db->open(); 3987 } 3988 } 3989 #endif 3990 3991 void hci_init(const hci_transport_t *transport, const void *config){ 3992 3993 #ifdef HAVE_MALLOC 3994 if (!hci_stack) { 3995 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3996 } 3997 #else 3998 hci_stack = &hci_stack_static; 3999 #endif 4000 memset(hci_stack, 0, sizeof(hci_stack_t)); 4001 4002 // reference to use transport layer implementation 4003 hci_stack->hci_transport = transport; 4004 4005 // reference to used config 4006 hci_stack->config = config; 4007 4008 // setup pointer for outgoing packet buffer 4009 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4010 4011 // max acl payload size defined in config.h 4012 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4013 4014 // register packet handlers with transport 4015 transport->register_packet_handler(&packet_handler); 4016 4017 hci_stack->state = HCI_STATE_OFF; 4018 4019 // class of device 4020 hci_stack->class_of_device = 0x007a020c; // Smartphone 4021 4022 // bondable by default 4023 hci_stack->bondable = 1; 4024 4025 #ifdef ENABLE_CLASSIC 4026 // classic name 4027 hci_stack->local_name = default_classic_name; 4028 4029 // Master slave policy 4030 hci_stack->master_slave_policy = 1; 4031 4032 // Allow Role Switch 4033 hci_stack->allow_role_switch = 1; 4034 4035 // Default / minimum security level = 2 4036 hci_stack->gap_security_level = LEVEL_2; 4037 4038 // Default Security Mode 4 4039 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4040 4041 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4042 hci_stack->gap_required_encyrption_key_size = 7; 4043 4044 // Link Supervision Timeout 4045 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4046 4047 #endif 4048 4049 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4050 hci_stack->ssp_enable = 1; 4051 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4052 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4053 hci_stack->ssp_auto_accept = 1; 4054 4055 // Secure Connections: enable (requires support from Controller) 4056 hci_stack->secure_connections_enable = true; 4057 4058 // voice setting - signed 16 bit pcm data with CVSD over the air 4059 hci_stack->sco_voice_setting = 0x60; 4060 4061 #ifdef ENABLE_LE_CENTRAL 4062 // connection parameter to use for outgoing connections 4063 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4064 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4065 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4066 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4067 hci_stack->le_connection_latency = 4; // 4 4068 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4069 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4070 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4071 4072 // default LE Scanning 4073 hci_stack->le_scan_type = 0x1; // active 4074 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4075 hci_stack->le_scan_window = 0x30; // 30 ms 4076 #endif 4077 4078 #ifdef ENABLE_LE_PERIPHERAL 4079 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4080 #endif 4081 4082 // connection parameter range used to answer connection parameter update requests in l2cap 4083 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4084 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4085 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4086 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4087 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4088 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4089 4090 hci_state_reset(); 4091 } 4092 4093 void hci_deinit(void){ 4094 btstack_run_loop_remove_timer(&hci_stack->timeout); 4095 #ifdef HAVE_MALLOC 4096 if (hci_stack) { 4097 free(hci_stack); 4098 } 4099 #endif 4100 hci_stack = NULL; 4101 4102 #ifdef ENABLE_CLASSIC 4103 disable_l2cap_timeouts = 0; 4104 #endif 4105 } 4106 4107 /** 4108 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4109 */ 4110 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4111 hci_stack->chipset = chipset_driver; 4112 4113 // reset chipset driver - init is also called on power_up 4114 if (hci_stack->chipset && hci_stack->chipset->init){ 4115 hci_stack->chipset->init(hci_stack->config); 4116 } 4117 } 4118 4119 /** 4120 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4121 */ 4122 void hci_set_control(const btstack_control_t *hardware_control){ 4123 // references to used control implementation 4124 hci_stack->control = hardware_control; 4125 // init with transport config 4126 hardware_control->init(hci_stack->config); 4127 } 4128 4129 static void hci_discard_connections(void){ 4130 btstack_linked_list_iterator_t lit; 4131 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 4132 while (btstack_linked_list_iterator_has_next(&lit)){ 4133 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4134 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 4135 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4136 hci_shutdown_connection(connection); 4137 } 4138 } 4139 4140 void hci_close(void){ 4141 4142 #ifdef ENABLE_CLASSIC 4143 // close remote device db 4144 if (hci_stack->link_key_db) { 4145 hci_stack->link_key_db->close(); 4146 } 4147 #endif 4148 4149 hci_discard_connections(); 4150 4151 hci_power_control(HCI_POWER_OFF); 4152 4153 #ifdef HAVE_MALLOC 4154 free(hci_stack); 4155 #endif 4156 hci_stack = NULL; 4157 } 4158 4159 #ifdef HAVE_SCO_TRANSPORT 4160 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4161 hci_stack->sco_transport = sco_transport; 4162 sco_transport->register_packet_handler(&packet_handler); 4163 } 4164 #endif 4165 4166 #ifdef ENABLE_CLASSIC 4167 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4168 // validate ranage and set 4169 if (encryption_key_size < 7) return; 4170 if (encryption_key_size > 16) return; 4171 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4172 } 4173 4174 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4175 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4176 hci_stack->gap_security_mode = security_mode; 4177 return ERROR_CODE_SUCCESS; 4178 } else { 4179 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4180 } 4181 } 4182 4183 gap_security_mode_t gap_get_security_mode(void){ 4184 return hci_stack->gap_security_mode; 4185 } 4186 4187 void gap_set_security_level(gap_security_level_t security_level){ 4188 hci_stack->gap_security_level = security_level; 4189 } 4190 4191 gap_security_level_t gap_get_security_level(void){ 4192 if (hci_stack->gap_secure_connections_only_mode){ 4193 return LEVEL_4; 4194 } 4195 return hci_stack->gap_security_level; 4196 } 4197 4198 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4199 hci_stack->gap_minimal_service_security_level = security_level; 4200 } 4201 4202 void gap_set_secure_connections_only_mode(bool enable){ 4203 hci_stack->gap_secure_connections_only_mode = enable; 4204 } 4205 4206 bool gap_get_secure_connections_only_mode(void){ 4207 return hci_stack->gap_secure_connections_only_mode; 4208 } 4209 #endif 4210 4211 #ifdef ENABLE_CLASSIC 4212 void gap_set_class_of_device(uint32_t class_of_device){ 4213 hci_stack->class_of_device = class_of_device; 4214 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4215 hci_run(); 4216 } 4217 4218 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4219 hci_stack->default_link_policy_settings = default_link_policy_settings; 4220 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4221 hci_run(); 4222 } 4223 4224 void gap_set_allow_role_switch(bool allow_role_switch){ 4225 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4226 } 4227 4228 uint8_t hci_get_allow_role_switch(void){ 4229 return hci_stack->allow_role_switch; 4230 } 4231 4232 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4233 hci_stack->link_supervision_timeout = link_supervision_timeout; 4234 } 4235 4236 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4237 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4238 } 4239 4240 uint16_t hci_automatic_flush_timeout(void){ 4241 return hci_stack->automatic_flush_timeout; 4242 } 4243 4244 void hci_disable_l2cap_timeout_check(void){ 4245 disable_l2cap_timeouts = 1; 4246 } 4247 #endif 4248 4249 #ifndef HAVE_HOST_CONTROLLER_API 4250 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4251 void hci_set_bd_addr(bd_addr_t addr){ 4252 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4253 hci_stack->custom_bd_addr_set = 1; 4254 } 4255 #endif 4256 4257 // State-Module-Driver overview 4258 // state module low-level 4259 // HCI_STATE_OFF off close 4260 // HCI_STATE_INITIALIZING, on open 4261 // HCI_STATE_WORKING, on open 4262 // HCI_STATE_HALTING, on open 4263 // HCI_STATE_SLEEPING, off/sleep close 4264 // HCI_STATE_FALLING_ASLEEP on open 4265 4266 static int hci_power_control_on(void){ 4267 4268 // power on 4269 int err = 0; 4270 if (hci_stack->control && hci_stack->control->on){ 4271 err = (*hci_stack->control->on)(); 4272 } 4273 if (err){ 4274 log_error( "POWER_ON failed"); 4275 hci_emit_hci_open_failed(); 4276 return err; 4277 } 4278 4279 // int chipset driver 4280 if (hci_stack->chipset && hci_stack->chipset->init){ 4281 hci_stack->chipset->init(hci_stack->config); 4282 } 4283 4284 // init transport 4285 if (hci_stack->hci_transport->init){ 4286 hci_stack->hci_transport->init(hci_stack->config); 4287 } 4288 4289 // open transport 4290 err = hci_stack->hci_transport->open(); 4291 if (err){ 4292 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4293 if (hci_stack->control && hci_stack->control->off){ 4294 (*hci_stack->control->off)(); 4295 } 4296 hci_emit_hci_open_failed(); 4297 return err; 4298 } 4299 return 0; 4300 } 4301 4302 static void hci_power_control_off(void){ 4303 4304 log_info("hci_power_control_off"); 4305 4306 // close low-level device 4307 hci_stack->hci_transport->close(); 4308 4309 log_info("hci_power_control_off - hci_transport closed"); 4310 4311 // power off 4312 if (hci_stack->control && hci_stack->control->off){ 4313 (*hci_stack->control->off)(); 4314 } 4315 4316 log_info("hci_power_control_off - control closed"); 4317 4318 hci_stack->state = HCI_STATE_OFF; 4319 } 4320 4321 static void hci_power_control_sleep(void){ 4322 4323 log_info("hci_power_control_sleep"); 4324 4325 #if 0 4326 // don't close serial port during sleep 4327 4328 // close low-level device 4329 hci_stack->hci_transport->close(hci_stack->config); 4330 #endif 4331 4332 // sleep mode 4333 if (hci_stack->control && hci_stack->control->sleep){ 4334 (*hci_stack->control->sleep)(); 4335 } 4336 4337 hci_stack->state = HCI_STATE_SLEEPING; 4338 } 4339 4340 static int hci_power_control_wake(void){ 4341 4342 log_info("hci_power_control_wake"); 4343 4344 // wake on 4345 if (hci_stack->control && hci_stack->control->wake){ 4346 (*hci_stack->control->wake)(); 4347 } 4348 4349 #if 0 4350 // open low-level device 4351 int err = hci_stack->hci_transport->open(hci_stack->config); 4352 if (err){ 4353 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4354 if (hci_stack->control && hci_stack->control->off){ 4355 (*hci_stack->control->off)(); 4356 } 4357 hci_emit_hci_open_failed(); 4358 return err; 4359 } 4360 #endif 4361 4362 return 0; 4363 } 4364 4365 static void hci_power_enter_initializing_state(void){ 4366 // set up state machine 4367 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4368 hci_stack->hci_packet_buffer_reserved = false; 4369 hci_stack->state = HCI_STATE_INITIALIZING; 4370 hci_stack->substate = HCI_INIT_SEND_RESET; 4371 } 4372 4373 static void hci_power_enter_halting_state(void){ 4374 #ifdef ENABLE_BLE 4375 hci_whitelist_free(); 4376 #endif 4377 // see hci_run 4378 hci_stack->state = HCI_STATE_HALTING; 4379 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4380 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4381 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4382 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4383 btstack_run_loop_add_timer(&hci_stack->timeout); 4384 } 4385 4386 // returns error 4387 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4388 int err; 4389 switch (power_mode){ 4390 case HCI_POWER_ON: 4391 err = hci_power_control_on(); 4392 if (err != 0) { 4393 log_error("hci_power_control_on() error %d", err); 4394 return err; 4395 } 4396 hci_power_enter_initializing_state(); 4397 break; 4398 case HCI_POWER_OFF: 4399 // do nothing 4400 break; 4401 case HCI_POWER_SLEEP: 4402 // do nothing (with SLEEP == OFF) 4403 break; 4404 default: 4405 btstack_assert(false); 4406 break; 4407 } 4408 return ERROR_CODE_SUCCESS; 4409 } 4410 4411 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4412 switch (power_mode){ 4413 case HCI_POWER_ON: 4414 // do nothing 4415 break; 4416 case HCI_POWER_OFF: 4417 // no connections yet, just turn it off 4418 hci_power_control_off(); 4419 break; 4420 case HCI_POWER_SLEEP: 4421 // no connections yet, just turn it off 4422 hci_power_control_sleep(); 4423 break; 4424 default: 4425 btstack_assert(false); 4426 break; 4427 } 4428 return ERROR_CODE_SUCCESS; 4429 } 4430 4431 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4432 switch (power_mode){ 4433 case HCI_POWER_ON: 4434 // do nothing 4435 break; 4436 case HCI_POWER_OFF: 4437 hci_power_enter_halting_state(); 4438 break; 4439 case HCI_POWER_SLEEP: 4440 // see hci_run 4441 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4442 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4443 break; 4444 default: 4445 btstack_assert(false); 4446 break; 4447 } 4448 return ERROR_CODE_SUCCESS; 4449 } 4450 4451 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4452 switch (power_mode){ 4453 case HCI_POWER_ON: 4454 hci_power_enter_initializing_state(); 4455 break; 4456 case HCI_POWER_OFF: 4457 // do nothing 4458 break; 4459 case HCI_POWER_SLEEP: 4460 // see hci_run 4461 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4462 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4463 break; 4464 default: 4465 btstack_assert(false); 4466 break; 4467 } 4468 return ERROR_CODE_SUCCESS; 4469 } 4470 4471 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4472 switch (power_mode){ 4473 case HCI_POWER_ON: 4474 hci_power_enter_initializing_state(); 4475 break; 4476 case HCI_POWER_OFF: 4477 hci_power_enter_halting_state(); 4478 break; 4479 case HCI_POWER_SLEEP: 4480 // do nothing 4481 break; 4482 default: 4483 btstack_assert(false); 4484 break; 4485 } 4486 return ERROR_CODE_SUCCESS; 4487 } 4488 4489 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4490 int err; 4491 switch (power_mode){ 4492 case HCI_POWER_ON: 4493 err = hci_power_control_wake(); 4494 if (err) return err; 4495 hci_power_enter_initializing_state(); 4496 break; 4497 case HCI_POWER_OFF: 4498 hci_power_enter_halting_state(); 4499 break; 4500 case HCI_POWER_SLEEP: 4501 // do nothing 4502 break; 4503 default: 4504 btstack_assert(false); 4505 break; 4506 } 4507 return ERROR_CODE_SUCCESS; 4508 } 4509 4510 int hci_power_control(HCI_POWER_MODE power_mode){ 4511 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4512 int err = 0; 4513 switch (hci_stack->state){ 4514 case HCI_STATE_OFF: 4515 err = hci_power_control_state_off(power_mode); 4516 break; 4517 case HCI_STATE_INITIALIZING: 4518 err = hci_power_control_state_initializing(power_mode); 4519 break; 4520 case HCI_STATE_WORKING: 4521 err = hci_power_control_state_working(power_mode); 4522 break; 4523 case HCI_STATE_HALTING: 4524 err = hci_power_control_state_halting(power_mode); 4525 break; 4526 case HCI_STATE_FALLING_ASLEEP: 4527 err = hci_power_control_state_falling_asleep(power_mode); 4528 break; 4529 case HCI_STATE_SLEEPING: 4530 err = hci_power_control_state_sleeping(power_mode); 4531 break; 4532 default: 4533 btstack_assert(false); 4534 break; 4535 } 4536 if (err != 0){ 4537 return err; 4538 } 4539 4540 // create internal event 4541 hci_emit_state(); 4542 4543 // trigger next/first action 4544 hci_run(); 4545 4546 return 0; 4547 } 4548 4549 4550 static void hci_halting_run(void) { 4551 4552 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4553 4554 hci_connection_t *connection; 4555 #ifdef ENABLE_BLE 4556 #ifdef ENABLE_LE_PERIPHERAL 4557 bool stop_advertismenets; 4558 #endif 4559 #endif 4560 4561 switch (hci_stack->substate) { 4562 case HCI_HALTING_CLASSIC_STOP: 4563 #ifdef ENABLE_CLASSIC 4564 if (!hci_can_send_command_packet_now()) return; 4565 4566 if (hci_stack->connectable || hci_stack->discoverable){ 4567 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4568 hci_send_cmd(&hci_write_scan_enable, 0); 4569 return; 4570 } 4571 #endif 4572 /* fall through */ 4573 4574 case HCI_HALTING_LE_ADV_STOP: 4575 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4576 4577 #ifdef ENABLE_BLE 4578 #ifdef ENABLE_LE_PERIPHERAL 4579 if (!hci_can_send_command_packet_now()) return; 4580 4581 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4582 4583 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4584 if (hci_extended_advertising_supported()){ 4585 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4586 btstack_linked_list_iterator_t it; 4587 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4588 // stop all periodic advertisements and check if an extended set is active 4589 while (btstack_linked_list_iterator_has_next(&it)){ 4590 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4591 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4592 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4593 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4594 return; 4595 } 4596 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4597 stop_advertismenets = true; 4598 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4599 } 4600 } 4601 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 4602 if (stop_advertismenets){ 4603 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4604 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4605 return; 4606 } 4607 } 4608 else 4609 #else 4610 { 4611 if (stop_advertismenets) { 4612 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4613 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4614 return; 4615 } 4616 } 4617 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4618 #endif /* ENABLE_LE_PERIPHERAL */ 4619 #endif /* ENABLE_BLE */ 4620 4621 /* fall through */ 4622 4623 case HCI_HALTING_LE_SCAN_STOP: 4624 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4625 if (!hci_can_send_command_packet_now()) return; 4626 4627 #ifdef ENABLE_BLE 4628 #ifdef ENABLE_LE_CENTRAL 4629 if (hci_stack->le_scanning_active){ 4630 hci_le_scan_stop(); 4631 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4632 return; 4633 } 4634 #endif 4635 #endif 4636 4637 /* fall through */ 4638 4639 case HCI_HALTING_DISCONNECT_ALL: 4640 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4641 if (!hci_can_send_command_packet_now()) return; 4642 4643 // close all open connections 4644 connection = (hci_connection_t *) hci_stack->connections; 4645 if (connection) { 4646 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4647 4648 // check state 4649 if (connection->state == SENT_DISCONNECT) return; 4650 connection->state = SENT_DISCONNECT; 4651 4652 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4653 4654 // finally, send the disconnect command 4655 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4656 return; 4657 } 4658 4659 btstack_run_loop_remove_timer(&hci_stack->timeout); 4660 4661 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4662 4663 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4664 log_info("HCI_STATE_HALTING: wait 50 ms"); 4665 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4666 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4667 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4668 btstack_run_loop_add_timer(&hci_stack->timeout); 4669 break; 4670 4671 case HCI_HALTING_CLOSE: 4672 // close left over connections (that had not been properly closed before) 4673 hci_discard_connections(); 4674 4675 log_info("HCI_STATE_HALTING, calling off"); 4676 4677 // switch mode 4678 hci_power_control_off(); 4679 4680 log_info("HCI_STATE_HALTING, emitting state"); 4681 hci_emit_state(); 4682 log_info("HCI_STATE_HALTING, done"); 4683 break; 4684 4685 case HCI_HALTING_W4_CLOSE_TIMER: 4686 // keep waiting 4687 4688 break; 4689 default: 4690 break; 4691 } 4692 }; 4693 4694 static void hci_falling_asleep_run(void){ 4695 hci_connection_t * connection; 4696 switch(hci_stack->substate) { 4697 case HCI_FALLING_ASLEEP_DISCONNECT: 4698 log_info("HCI_STATE_FALLING_ASLEEP"); 4699 // close all open connections 4700 connection = (hci_connection_t *) hci_stack->connections; 4701 if (connection){ 4702 4703 // send disconnect 4704 if (!hci_can_send_command_packet_now()) return; 4705 4706 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4707 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4708 4709 // send disconnected event right away - causes higher layer connections to get closed, too. 4710 hci_shutdown_connection(connection); 4711 return; 4712 } 4713 4714 if (hci_classic_supported()){ 4715 // disable page and inquiry scan 4716 if (!hci_can_send_command_packet_now()) return; 4717 4718 log_info("HCI_STATE_HALTING, disabling inq scans"); 4719 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4720 4721 // continue in next sub state 4722 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4723 break; 4724 } 4725 4726 /* fall through */ 4727 4728 case HCI_FALLING_ASLEEP_COMPLETE: 4729 log_info("HCI_STATE_HALTING, calling sleep"); 4730 // switch mode 4731 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4732 hci_emit_state(); 4733 break; 4734 4735 default: 4736 break; 4737 } 4738 } 4739 4740 #ifdef ENABLE_CLASSIC 4741 4742 static void hci_update_scan_enable(void){ 4743 // 2 = page scan, 1 = inq scan 4744 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4745 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4746 hci_run(); 4747 } 4748 4749 void gap_discoverable_control(uint8_t enable){ 4750 if (enable) enable = 1; // normalize argument 4751 4752 if (hci_stack->discoverable == enable){ 4753 hci_emit_discoverable_enabled(hci_stack->discoverable); 4754 return; 4755 } 4756 4757 hci_stack->discoverable = enable; 4758 hci_update_scan_enable(); 4759 } 4760 4761 void gap_connectable_control(uint8_t enable){ 4762 if (enable) enable = 1; // normalize argument 4763 4764 // don't emit event 4765 if (hci_stack->connectable == enable) return; 4766 4767 hci_stack->connectable = enable; 4768 hci_update_scan_enable(); 4769 } 4770 #endif 4771 4772 void gap_local_bd_addr(bd_addr_t address_buffer){ 4773 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4774 } 4775 4776 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4777 static void hci_host_num_completed_packets(void){ 4778 4779 // create packet manually as arrays are not supported and num_commands should not get reduced 4780 hci_reserve_packet_buffer(); 4781 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4782 4783 uint16_t size = 0; 4784 uint16_t num_handles = 0; 4785 packet[size++] = 0x35; 4786 packet[size++] = 0x0c; 4787 size++; // skip param len 4788 size++; // skip num handles 4789 4790 // add { handle, packets } entries 4791 btstack_linked_item_t * it; 4792 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4793 hci_connection_t * connection = (hci_connection_t *) it; 4794 if (connection->num_packets_completed){ 4795 little_endian_store_16(packet, size, connection->con_handle); 4796 size += 2; 4797 little_endian_store_16(packet, size, connection->num_packets_completed); 4798 size += 2; 4799 // 4800 num_handles++; 4801 connection->num_packets_completed = 0; 4802 } 4803 } 4804 4805 packet[2] = size - 3; 4806 packet[3] = num_handles; 4807 4808 hci_stack->host_completed_packets = 0; 4809 4810 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4811 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4812 4813 // release packet buffer for synchronous transport implementations 4814 if (hci_transport_synchronous()){ 4815 hci_release_packet_buffer(); 4816 hci_emit_transport_packet_sent(); 4817 } 4818 } 4819 #endif 4820 4821 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4822 UNUSED(ds); 4823 hci_stack->substate = HCI_HALTING_CLOSE; 4824 // allow packet handlers to defer final shutdown 4825 hci_emit_state(); 4826 hci_run(); 4827 } 4828 4829 static bool hci_run_acl_fragments(void){ 4830 if (hci_stack->acl_fragmentation_total_size > 0u) { 4831 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4832 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4833 if (connection) { 4834 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4835 hci_send_acl_packet_fragments(connection); 4836 return true; 4837 } 4838 } else { 4839 // connection gone -> discard further fragments 4840 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4841 hci_stack->acl_fragmentation_total_size = 0; 4842 hci_stack->acl_fragmentation_pos = 0; 4843 } 4844 } 4845 return false; 4846 } 4847 4848 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4849 static bool hci_run_iso_fragments(void){ 4850 if (hci_stack->iso_fragmentation_total_size > 0u) { 4851 // TODO: flow control 4852 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 4853 hci_send_iso_packet_fragments(); 4854 return true; 4855 } 4856 } 4857 return false; 4858 } 4859 #endif 4860 4861 #ifdef ENABLE_CLASSIC 4862 4863 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4864 static bool hci_classic_operation_active(void) { 4865 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4866 return true; 4867 } 4868 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4869 return true; 4870 } 4871 btstack_linked_item_t * it; 4872 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4873 hci_connection_t *connection = (hci_connection_t *) it; 4874 switch (connection->state) { 4875 case SENT_CREATE_CONNECTION: 4876 case SENT_CANCEL_CONNECTION: 4877 case SENT_DISCONNECT: 4878 return true; 4879 default: 4880 break; 4881 } 4882 } 4883 return false; 4884 } 4885 #endif 4886 4887 static bool hci_run_general_gap_classic(void){ 4888 4889 // assert stack is working and classic is active 4890 if (hci_classic_supported() == false) return false; 4891 if (hci_stack->state != HCI_STATE_WORKING) return false; 4892 4893 // decline incoming connections 4894 if (hci_stack->decline_reason){ 4895 uint8_t reason = hci_stack->decline_reason; 4896 hci_stack->decline_reason = 0; 4897 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4898 return true; 4899 } 4900 4901 if (hci_stack->gap_tasks_classic != 0){ 4902 hci_run_gap_tasks_classic(); 4903 return true; 4904 } 4905 4906 // start/stop inquiry 4907 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4908 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4909 if (hci_classic_operation_active() == false) 4910 #endif 4911 { 4912 uint8_t duration = hci_stack->inquiry_state; 4913 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4914 if (hci_stack->inquiry_max_period_length != 0){ 4915 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); 4916 } else { 4917 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4918 } 4919 return true; 4920 } 4921 } 4922 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4923 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4924 hci_send_cmd(&hci_inquiry_cancel); 4925 return true; 4926 } 4927 4928 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 4929 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4930 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 4931 return true; 4932 } 4933 4934 // remote name request 4935 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4936 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4937 if (hci_classic_operation_active() == false) 4938 #endif 4939 { 4940 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4941 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4942 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4943 return true; 4944 } 4945 } 4946 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4947 // Local OOB data 4948 if (hci_stack->classic_read_local_oob_data){ 4949 hci_stack->classic_read_local_oob_data = false; 4950 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4951 hci_send_cmd(&hci_read_local_extended_oob_data); 4952 } else { 4953 hci_send_cmd(&hci_read_local_oob_data); 4954 } 4955 } 4956 #endif 4957 // pairing 4958 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4959 uint8_t state = hci_stack->gap_pairing_state; 4960 uint8_t pin_code[16]; 4961 switch (state){ 4962 case GAP_PAIRING_STATE_SEND_PIN: 4963 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4964 memset(pin_code, 0, 16); 4965 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4966 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4967 break; 4968 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4969 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4970 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4971 break; 4972 case GAP_PAIRING_STATE_SEND_PASSKEY: 4973 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4974 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4975 break; 4976 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4977 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4978 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4979 break; 4980 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4981 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4982 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4983 break; 4984 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4985 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4986 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4987 break; 4988 default: 4989 break; 4990 } 4991 return true; 4992 } 4993 return false; 4994 } 4995 #endif 4996 4997 #ifdef ENABLE_BLE 4998 4999 #ifdef ENABLE_LE_CENTRAL 5000 static void hci_le_scan_stop(void){ 5001 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5002 if (hci_extended_advertising_supported()) { 5003 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5004 } else 5005 #endif 5006 { 5007 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5008 } 5009 } 5010 #endif 5011 5012 #ifdef ENABLE_LE_PERIPHERAL 5013 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5014 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5015 uint8_t operation = 0; 5016 if (pos == 0){ 5017 // first fragment or complete data 5018 operation |= 1; 5019 } 5020 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5021 // last fragment or complete data 5022 operation |= 2; 5023 } 5024 return operation; 5025 } 5026 #endif 5027 #endif 5028 5029 static bool hci_run_general_gap_le(void){ 5030 5031 btstack_linked_list_iterator_t lit; 5032 5033 // Phase 1: collect what to stop 5034 5035 #ifdef ENABLE_LE_CENTRAL 5036 bool scanning_stop = false; 5037 bool connecting_stop = false; 5038 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5039 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5040 bool periodic_sync_stop = false; 5041 #endif 5042 #endif 5043 #endif 5044 5045 #ifdef ENABLE_LE_PERIPHERAL 5046 bool advertising_stop = false; 5047 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5048 le_advertising_set_t * advertising_stop_set = NULL; 5049 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5050 bool periodic_advertising_stop = false; 5051 #endif 5052 #endif 5053 #endif 5054 5055 // check if own address changes 5056 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5057 5058 // check if whitelist needs modification 5059 bool whitelist_modification_pending = false; 5060 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5061 while (btstack_linked_list_iterator_has_next(&lit)){ 5062 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5063 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5064 whitelist_modification_pending = true; 5065 break; 5066 } 5067 } 5068 5069 // check if resolving list needs modification 5070 bool resolving_list_modification_pending = false; 5071 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5072 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5073 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5074 resolving_list_modification_pending = true; 5075 } 5076 #endif 5077 5078 #ifdef ENABLE_LE_CENTRAL 5079 5080 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5081 // check if periodic advertiser list needs modification 5082 bool periodic_list_modification_pending = false; 5083 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5084 while (btstack_linked_list_iterator_has_next(&lit)){ 5085 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5086 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5087 periodic_list_modification_pending = true; 5088 break; 5089 } 5090 } 5091 #endif 5092 5093 // scanning control 5094 if (hci_stack->le_scanning_active) { 5095 // stop if: 5096 // - parameter change required 5097 // - it's disabled 5098 // - whitelist change required but used for scanning 5099 // - resolving list modified 5100 // - own address changes 5101 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5102 if ((hci_stack->le_scanning_param_update) || 5103 !hci_stack->le_scanning_enabled || 5104 (scanning_uses_whitelist && whitelist_modification_pending) || 5105 resolving_list_modification_pending || 5106 random_address_change){ 5107 5108 scanning_stop = true; 5109 } 5110 } 5111 5112 // connecting control 5113 bool connecting_with_whitelist; 5114 switch (hci_stack->le_connecting_state){ 5115 case LE_CONNECTING_DIRECT: 5116 case LE_CONNECTING_WHITELIST: 5117 // stop connecting if: 5118 // - connecting uses white and whitelist modification pending 5119 // - if it got disabled 5120 // - resolving list modified 5121 // - own address changes 5122 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5123 if ((connecting_with_whitelist && whitelist_modification_pending) || 5124 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5125 resolving_list_modification_pending || 5126 random_address_change) { 5127 5128 connecting_stop = true; 5129 } 5130 break; 5131 default: 5132 break; 5133 } 5134 5135 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5136 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5137 // periodic sync control 5138 bool sync_with_advertiser_list; 5139 switch(hci_stack->le_periodic_sync_state){ 5140 case LE_CONNECTING_DIRECT: 5141 case LE_CONNECTING_WHITELIST: 5142 // stop sync if: 5143 // - sync with advertiser list and advertiser list modification pending 5144 // - if it got disabled 5145 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5146 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5147 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5148 periodic_sync_stop = true; 5149 } 5150 break; 5151 default: 5152 break; 5153 } 5154 #endif 5155 #endif 5156 5157 #endif /* ENABLE_LE_CENTRAL */ 5158 5159 #ifdef ENABLE_LE_PERIPHERAL 5160 // le advertisement control 5161 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5162 // stop if: 5163 // - parameter change required 5164 // - random address used in advertising and changes 5165 // - it's disabled 5166 // - whitelist change required but used for advertisement filter policy 5167 // - resolving list modified 5168 // - own address changes 5169 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5170 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5171 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5172 if (advertising_change || 5173 (advertising_uses_random_address && random_address_change) || 5174 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5175 (advertising_uses_whitelist && whitelist_modification_pending) || 5176 resolving_list_modification_pending || 5177 random_address_change) { 5178 5179 advertising_stop = true; 5180 } 5181 } 5182 5183 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5184 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5185 btstack_linked_list_iterator_t it; 5186 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5187 while (btstack_linked_list_iterator_has_next(&it)){ 5188 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5189 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5190 // stop if: 5191 // - parameter change required 5192 // - random address used in connectable advertising and changes 5193 // - it's disabled 5194 // - whitelist change required but used for advertisement filter policy 5195 // - resolving list modified 5196 // - own address changes 5197 // - advertisement set will be removed 5198 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5199 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5200 bool advertising_uses_random_address = 5201 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5202 advertising_connectable; 5203 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5204 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5205 bool advertising_set_random_address_change = 5206 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5207 bool advertising_set_will_be_removed = 5208 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5209 if (advertising_parameter_change || 5210 (advertising_uses_random_address && advertising_set_random_address_change) || 5211 (advertising_enabled == false) || 5212 (advertising_uses_whitelist && whitelist_modification_pending) || 5213 resolving_list_modification_pending || 5214 advertising_set_will_be_removed) { 5215 5216 advertising_stop = true; 5217 advertising_stop_set = advertising_set; 5218 break; 5219 } 5220 } 5221 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5222 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5223 // stop if: 5224 // - it's disabled 5225 // - parameter change required 5226 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5227 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5228 if ((periodic_enabled == false) || periodic_parameter_change){ 5229 periodic_advertising_stop = true; 5230 advertising_stop_set = advertising_set; 5231 } 5232 } 5233 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5234 } 5235 } 5236 #endif 5237 5238 #endif 5239 5240 5241 // Phase 2: stop everything that should be off during modifications 5242 5243 #ifdef ENABLE_LE_CENTRAL 5244 if (scanning_stop){ 5245 hci_stack->le_scanning_active = false; 5246 hci_le_scan_stop(); 5247 return true; 5248 } 5249 5250 if (connecting_stop){ 5251 hci_send_cmd(&hci_le_create_connection_cancel); 5252 return true; 5253 } 5254 5255 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5256 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5257 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5258 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5259 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5260 return true; 5261 } 5262 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5263 if (periodic_sync_stop){ 5264 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5265 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5266 return true; 5267 } 5268 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5269 #endif 5270 #endif 5271 5272 #ifdef ENABLE_LE_PERIPHERAL 5273 if (advertising_stop){ 5274 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5275 if (hci_extended_advertising_supported()) { 5276 uint8_t advertising_stop_handle; 5277 if (advertising_stop_set != NULL){ 5278 advertising_stop_handle = advertising_stop_set->advertising_handle; 5279 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5280 } else { 5281 advertising_stop_handle = 0; 5282 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5283 } 5284 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5285 const uint16_t durations[] = { 0 }; 5286 const uint16_t max_events[] = { 0 }; 5287 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5288 } else 5289 #endif 5290 { 5291 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5292 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5293 } 5294 return true; 5295 } 5296 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5297 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5298 if (periodic_advertising_stop){ 5299 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5300 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5301 return true; 5302 } 5303 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5304 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5305 #endif 5306 5307 // Phase 3: modify 5308 5309 if (random_address_change){ 5310 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5311 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5312 if (hci_extended_advertising_supported()) { 5313 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5314 } 5315 #endif 5316 { 5317 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5318 } 5319 return true; 5320 } 5321 5322 #ifdef ENABLE_LE_CENTRAL 5323 if (hci_stack->le_scanning_param_update){ 5324 hci_stack->le_scanning_param_update = false; 5325 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5326 if (hci_extended_advertising_supported()){ 5327 // prepare arrays for all PHYs 5328 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5329 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5330 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5331 uint8_t scanning_phys = 1; // LE 1M PHY 5332 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5333 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5334 } else 5335 #endif 5336 { 5337 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5338 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5339 } 5340 return true; 5341 } 5342 #endif 5343 5344 #ifdef ENABLE_LE_PERIPHERAL 5345 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5346 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5347 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5348 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5349 if (hci_extended_advertising_supported()){ 5350 // map advertisment type to advertising event properties 5351 uint16_t adv_event_properties = 0; 5352 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5353 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5354 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5355 } 5356 hci_stack->le_advertising_set_in_current_command = 0; 5357 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5358 0, 5359 adv_event_properties, 5360 hci_stack->le_advertisements_interval_min, 5361 hci_stack->le_advertisements_interval_max, 5362 hci_stack->le_advertisements_channel_map, 5363 hci_stack->le_advertisements_own_addr_type, 5364 hci_stack->le_advertisements_direct_address_type, 5365 hci_stack->le_advertisements_direct_address, 5366 hci_stack->le_advertisements_filter_policy, 5367 0x7f, // tx power: no preference 5368 0x01, // primary adv phy: LE 1M 5369 0, // secondary adv max skip 5370 0, // secondary adv phy 5371 0, // adv sid 5372 0 // scan request notification 5373 ); 5374 } 5375 #endif 5376 { 5377 hci_send_cmd(&hci_le_set_advertising_parameters, 5378 hci_stack->le_advertisements_interval_min, 5379 hci_stack->le_advertisements_interval_max, 5380 hci_stack->le_advertisements_type, 5381 hci_stack->le_advertisements_own_addr_type, 5382 hci_stack->le_advertisements_direct_address_type, 5383 hci_stack->le_advertisements_direct_address, 5384 hci_stack->le_advertisements_channel_map, 5385 hci_stack->le_advertisements_filter_policy); 5386 } 5387 return true; 5388 } 5389 5390 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5391 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5392 uint8_t adv_data_clean[31]; 5393 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5394 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5395 hci_stack->le_advertisements_data_len); 5396 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5397 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5398 if (hci_extended_advertising_supported()){ 5399 hci_stack->le_advertising_set_in_current_command = 0; 5400 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5401 } else 5402 #endif 5403 { 5404 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5405 } 5406 return true; 5407 } 5408 5409 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5410 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5411 uint8_t scan_data_clean[31]; 5412 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5413 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5414 hci_stack->le_scan_response_data_len); 5415 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5416 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5417 if (hci_extended_advertising_supported()){ 5418 hci_stack->le_advertising_set_in_current_command = 0; 5419 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5420 } else 5421 #endif 5422 { 5423 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5424 } 5425 return true; 5426 } 5427 5428 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5429 if (hci_extended_advertising_supported()) { 5430 btstack_linked_list_iterator_t it; 5431 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5432 while (btstack_linked_list_iterator_has_next(&it)){ 5433 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5434 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5435 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5436 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5437 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5438 return true; 5439 } 5440 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5441 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5442 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5443 return true; 5444 } 5445 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5446 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5447 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5448 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5449 advertising_set->advertising_handle, 5450 advertising_set->extended_params.advertising_event_properties, 5451 advertising_set->extended_params.primary_advertising_interval_min, 5452 advertising_set->extended_params.primary_advertising_interval_max, 5453 advertising_set->extended_params.primary_advertising_channel_map, 5454 advertising_set->extended_params.own_address_type, 5455 advertising_set->extended_params.peer_address_type, 5456 advertising_set->extended_params.peer_address, 5457 advertising_set->extended_params.advertising_filter_policy, 5458 advertising_set->extended_params.advertising_tx_power, 5459 advertising_set->extended_params.primary_advertising_phy, 5460 advertising_set->extended_params.secondary_advertising_max_skip, 5461 advertising_set->extended_params.secondary_advertising_phy, 5462 advertising_set->extended_params.advertising_sid, 5463 advertising_set->extended_params.scan_request_notification_enable 5464 ); 5465 return true; 5466 } 5467 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5468 uint16_t pos = advertising_set->adv_data_pos; 5469 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5470 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5471 if ((operation & 0x02) != 0){ 5472 // last fragment or complete data 5473 operation |= 2; 5474 advertising_set->adv_data_pos = 0; 5475 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5476 } else { 5477 advertising_set->adv_data_pos += data_to_upload; 5478 } 5479 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5480 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5481 return true; 5482 } 5483 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5484 uint16_t pos = advertising_set->scan_data_pos; 5485 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5486 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5487 if ((operation & 0x02) != 0){ 5488 advertising_set->scan_data_pos = 0; 5489 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5490 } else { 5491 advertising_set->scan_data_pos += data_to_upload; 5492 } 5493 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5494 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5495 return true; 5496 } 5497 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5498 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5499 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5500 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5501 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5502 advertising_set->advertising_handle, 5503 advertising_set->periodic_params.periodic_advertising_interval_min, 5504 advertising_set->periodic_params.periodic_advertising_interval_max, 5505 advertising_set->periodic_params.periodic_advertising_properties); 5506 return true; 5507 } 5508 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5509 uint16_t pos = advertising_set->periodic_data_pos; 5510 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5511 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5512 if ((operation & 0x02) != 0){ 5513 // last fragment or complete data 5514 operation |= 2; 5515 advertising_set->periodic_data_pos = 0; 5516 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5517 } else { 5518 advertising_set->periodic_data_pos += data_to_upload; 5519 } 5520 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5521 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5522 return true; 5523 } 5524 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5525 } 5526 } 5527 #endif 5528 5529 #endif 5530 5531 #ifdef ENABLE_LE_CENTRAL 5532 // if connect with whitelist was active and is not cancelled yet, wait until next time 5533 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5534 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5535 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 5536 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 5537 #endif 5538 #endif 5539 5540 // LE Whitelist Management 5541 if (whitelist_modification_pending){ 5542 // add/remove entries 5543 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5544 while (btstack_linked_list_iterator_has_next(&lit)){ 5545 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5546 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5547 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5548 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5549 return true; 5550 } 5551 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5552 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5553 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5554 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5555 return true; 5556 } 5557 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5558 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5559 btstack_memory_whitelist_entry_free(entry); 5560 } 5561 } 5562 } 5563 5564 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5565 // LE Resolving List Management 5566 if (resolving_list_supported) { 5567 uint16_t i; 5568 switch (hci_stack->le_resolving_list_state) { 5569 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5570 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5571 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5572 return true; 5573 case LE_RESOLVING_LIST_READ_SIZE: 5574 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5575 hci_send_cmd(&hci_le_read_resolving_list_size); 5576 return true; 5577 case LE_RESOLVING_LIST_SEND_CLEAR: 5578 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5579 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5580 sizeof(hci_stack->le_resolving_list_add_entries)); 5581 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5582 sizeof(hci_stack->le_resolving_list_remove_entries)); 5583 hci_send_cmd(&hci_le_clear_resolving_list); 5584 return true; 5585 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5586 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5587 uint8_t offset = i >> 3; 5588 uint8_t mask = 1 << (i & 7); 5589 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5590 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5591 bd_addr_t peer_identity_addreses; 5592 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5593 sm_key_t peer_irk; 5594 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5595 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5596 5597 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5598 // trigger whitelist entry 'update' (work around for controller bug) 5599 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5600 while (btstack_linked_list_iterator_has_next(&lit)) { 5601 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5602 if (entry->address_type != peer_identity_addr_type) continue; 5603 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5604 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5605 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5606 } 5607 #endif 5608 5609 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5610 peer_identity_addreses); 5611 return true; 5612 } 5613 5614 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5615 5616 /* fall through */ 5617 5618 case LE_RESOLVING_LIST_ADD_ENTRIES: 5619 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5620 uint8_t offset = i >> 3; 5621 uint8_t mask = 1 << (i & 7); 5622 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5623 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5624 bd_addr_t peer_identity_addreses; 5625 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5626 sm_key_t peer_irk; 5627 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5628 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5629 const uint8_t *local_irk = gap_get_persistent_irk(); 5630 // command uses format specifier 'P' that stores 16-byte value without flip 5631 uint8_t local_irk_flipped[16]; 5632 uint8_t peer_irk_flipped[16]; 5633 reverse_128(local_irk, local_irk_flipped); 5634 reverse_128(peer_irk, peer_irk_flipped); 5635 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5636 peer_irk_flipped, local_irk_flipped); 5637 return true; 5638 } 5639 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5640 break; 5641 5642 default: 5643 break; 5644 } 5645 } 5646 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5647 #endif 5648 5649 #ifdef ENABLE_LE_CENTRAL 5650 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5651 // LE Whitelist Management 5652 if (periodic_list_modification_pending){ 5653 // add/remove entries 5654 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5655 while (btstack_linked_list_iterator_has_next(&lit)){ 5656 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5657 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 5658 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 5659 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 5660 return true; 5661 } 5662 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 5663 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 5664 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 5665 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address); 5666 return true; 5667 } 5668 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 5669 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 5670 btstack_memory_periodic_advertiser_list_entry_free(entry); 5671 } 5672 } 5673 } 5674 #endif 5675 #endif 5676 5677 // post-pone all actions until stack is fully working 5678 if (hci_stack->state != HCI_STATE_WORKING) return false; 5679 5680 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5681 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5682 5683 // Phase 4: restore state 5684 5685 #ifdef ENABLE_LE_CENTRAL 5686 // re-start scanning 5687 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5688 hci_stack->le_scanning_active = true; 5689 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5690 if (hci_extended_advertising_supported()){ 5691 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5692 } else 5693 #endif 5694 { 5695 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5696 } 5697 return true; 5698 } 5699 #endif 5700 5701 #ifdef ENABLE_LE_CENTRAL 5702 // re-start connecting 5703 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5704 bd_addr_t null_addr; 5705 memset(null_addr, 0, 6); 5706 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5707 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5708 hci_send_cmd(&hci_le_create_connection, 5709 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5710 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5711 1, // use whitelist 5712 0, // peer address type 5713 null_addr, // peer bd addr 5714 hci_stack->le_connection_own_addr_type, // our addr type: 5715 hci_stack->le_connection_interval_min, // conn interval min 5716 hci_stack->le_connection_interval_max, // conn interval max 5717 hci_stack->le_connection_latency, // conn latency 5718 hci_stack->le_supervision_timeout, // conn latency 5719 hci_stack->le_minimum_ce_length, // min ce length 5720 hci_stack->le_maximum_ce_length // max ce length 5721 ); 5722 return true; 5723 } 5724 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5725 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 5726 switch(hci_stack->le_periodic_sync_request){ 5727 case LE_CONNECTING_DIRECT: 5728 case LE_CONNECTING_WHITELIST: 5729 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 5730 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 5731 hci_stack->le_periodic_sync_options, 5732 hci_stack->le_periodic_sync_advertising_sid, 5733 hci_stack->le_periodic_sync_advertiser_address_type, 5734 hci_stack->le_periodic_sync_advertiser_address, 5735 hci_stack->le_periodic_sync_skip, 5736 hci_stack->le_periodic_sync_timeout, 5737 hci_stack->le_periodic_sync_cte_type); 5738 return true; 5739 default: 5740 break; 5741 } 5742 } 5743 #endif 5744 #endif 5745 5746 #ifdef ENABLE_LE_PERIPHERAL 5747 // re-start advertising 5748 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5749 // check if advertisements should be enabled given 5750 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5751 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5752 5753 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5754 if (hci_extended_advertising_supported()){ 5755 const uint8_t advertising_handles[] = { 0 }; 5756 const uint16_t durations[] = { 0 }; 5757 const uint16_t max_events[] = { 0 }; 5758 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5759 } else 5760 #endif 5761 { 5762 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5763 } 5764 return true; 5765 } 5766 5767 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5768 if (hci_extended_advertising_supported()) { 5769 btstack_linked_list_iterator_t it; 5770 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5771 while (btstack_linked_list_iterator_has_next(&it)) { 5772 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5773 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5774 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5775 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5776 const uint16_t durations[] = { advertising_set->enable_timeout }; 5777 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5778 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5779 return true; 5780 } 5781 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5782 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5783 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5784 uint8_t enable = 1; 5785 if (advertising_set->periodic_include_adi){ 5786 enable |= 2; 5787 } 5788 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5789 return true; 5790 } 5791 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5792 } 5793 } 5794 #endif 5795 #endif 5796 5797 return false; 5798 } 5799 #endif 5800 5801 static bool hci_run_general_pending_commands(void){ 5802 btstack_linked_item_t * it; 5803 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5804 hci_connection_t * connection = (hci_connection_t *) it; 5805 5806 switch(connection->state){ 5807 case SEND_CREATE_CONNECTION: 5808 switch(connection->address_type){ 5809 #ifdef ENABLE_CLASSIC 5810 case BD_ADDR_TYPE_ACL: 5811 log_info("sending hci_create_connection"); 5812 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5813 break; 5814 #endif 5815 default: 5816 #ifdef ENABLE_BLE 5817 #ifdef ENABLE_LE_CENTRAL 5818 log_info("sending hci_le_create_connection"); 5819 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5820 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5821 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5822 if (hci_extended_advertising_supported()) { 5823 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 5824 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 5825 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 5826 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 5827 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 5828 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 5829 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 5830 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 5831 hci_send_cmd(&hci_le_extended_create_connection, 5832 0, // don't use whitelist 5833 hci_stack->le_connection_own_addr_type, // our addr type: 5834 connection->address_type, // peer address type 5835 connection->address, // peer bd addr 5836 1, // initiating PHY - 1M 5837 le_connection_scan_interval, // conn scan interval 5838 le_connection_scan_window, // conn scan windows 5839 le_connection_interval_min, // conn interval min 5840 le_connection_interval_max, // conn interval max 5841 le_connection_latency, // conn latency 5842 le_supervision_timeout, // conn latency 5843 le_minimum_ce_length, // min ce length 5844 le_maximum_ce_length // max ce length 5845 ); } 5846 else 5847 #endif 5848 { 5849 hci_send_cmd(&hci_le_create_connection, 5850 hci_stack->le_connection_scan_interval, // conn scan interval 5851 hci_stack->le_connection_scan_window, // conn scan windows 5852 0, // don't use whitelist 5853 connection->address_type, // peer address type 5854 connection->address, // peer bd addr 5855 hci_stack->le_connection_own_addr_type, // our addr type: 5856 hci_stack->le_connection_interval_min, // conn interval min 5857 hci_stack->le_connection_interval_max, // conn interval max 5858 hci_stack->le_connection_latency, // conn latency 5859 hci_stack->le_supervision_timeout, // conn latency 5860 hci_stack->le_minimum_ce_length, // min ce length 5861 hci_stack->le_maximum_ce_length // max ce length 5862 ); 5863 } 5864 connection->state = SENT_CREATE_CONNECTION; 5865 #endif 5866 #endif 5867 break; 5868 } 5869 return true; 5870 5871 #ifdef ENABLE_CLASSIC 5872 case RECEIVED_CONNECTION_REQUEST: 5873 connection->role = HCI_ROLE_SLAVE; 5874 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5875 log_info("sending hci_accept_connection_request"); 5876 connection->state = ACCEPTED_CONNECTION_REQUEST; 5877 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5878 return true; 5879 } 5880 break; 5881 #endif 5882 5883 #ifdef ENABLE_BLE 5884 #ifdef ENABLE_LE_CENTRAL 5885 case SEND_CANCEL_CONNECTION: 5886 connection->state = SENT_CANCEL_CONNECTION; 5887 hci_send_cmd(&hci_le_create_connection_cancel); 5888 return true; 5889 #endif 5890 #endif 5891 case SEND_DISCONNECT: 5892 connection->state = SENT_DISCONNECT; 5893 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5894 return true; 5895 5896 default: 5897 break; 5898 } 5899 5900 // no further commands if connection is about to get shut down 5901 if (connection->state == SENT_DISCONNECT) continue; 5902 5903 #ifdef ENABLE_CLASSIC 5904 5905 // Handling link key request requires remote supported features 5906 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5907 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5908 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5909 5910 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5911 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5912 if (have_link_key && security_level_sufficient){ 5913 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5914 } else { 5915 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5916 } 5917 return true; 5918 } 5919 5920 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5921 log_info("denying to pin request"); 5922 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5923 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5924 return true; 5925 } 5926 5927 // security assessment requires remote features 5928 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5929 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5930 hci_ssp_assess_security_on_io_cap_request(connection); 5931 // 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 5932 } 5933 5934 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5935 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5936 // set authentication requirements: 5937 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5938 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5939 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5940 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5941 authreq |= 1; 5942 } 5943 bool bonding = hci_stack->bondable; 5944 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5945 // if we have received IO Cap Response, we're in responder role 5946 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5947 if (bonding && !remote_bonding){ 5948 log_info("Remote not bonding, dropping local flag"); 5949 bonding = false; 5950 } 5951 } 5952 if (bonding){ 5953 if (connection->bonding_flags & BONDING_DEDICATED){ 5954 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5955 } else { 5956 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5957 } 5958 } 5959 uint8_t have_oob_data = 0; 5960 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5961 if (connection->classic_oob_c_192 != NULL){ 5962 have_oob_data |= 1; 5963 } 5964 if (connection->classic_oob_c_256 != NULL){ 5965 have_oob_data |= 2; 5966 } 5967 #endif 5968 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5969 return true; 5970 } 5971 5972 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5973 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5974 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5975 return true; 5976 } 5977 5978 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5979 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5980 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5981 const uint8_t zero[16] = { 0 }; 5982 const uint8_t * r_192 = zero; 5983 const uint8_t * c_192 = zero; 5984 const uint8_t * r_256 = zero; 5985 const uint8_t * c_256 = zero; 5986 // verify P-256 OOB 5987 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5988 c_256 = connection->classic_oob_c_256; 5989 if (connection->classic_oob_r_256 != NULL) { 5990 r_256 = connection->classic_oob_r_256; 5991 } 5992 } 5993 // verify P-192 OOB 5994 if ((connection->classic_oob_c_192 != NULL)) { 5995 c_192 = connection->classic_oob_c_192; 5996 if (connection->classic_oob_r_192 != NULL) { 5997 r_192 = connection->classic_oob_r_192; 5998 } 5999 } 6000 6001 // assess security 6002 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6003 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6004 if (need_level_4 && !can_reach_level_4){ 6005 log_info("Level 4 required, but not possible -> abort"); 6006 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6007 // send oob negative reply 6008 c_256 = NULL; 6009 c_192 = NULL; 6010 } 6011 6012 // Reply 6013 if (c_256 != zero) { 6014 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6015 } else if (c_192 != zero){ 6016 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6017 } else { 6018 hci_stack->classic_oob_con_handle = connection->con_handle; 6019 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6020 } 6021 return true; 6022 } 6023 #endif 6024 6025 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6026 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6027 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6028 return true; 6029 } 6030 6031 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6032 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6033 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6034 return true; 6035 } 6036 6037 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6038 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6039 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6040 return true; 6041 } 6042 6043 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6044 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6045 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6046 connection->state = SENT_DISCONNECT; 6047 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6048 return true; 6049 } 6050 6051 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6052 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6053 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6054 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6055 return true; 6056 } 6057 6058 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6059 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6060 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6061 return true; 6062 } 6063 6064 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6065 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6066 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6067 return true; 6068 } 6069 6070 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6071 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6072 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6073 return true; 6074 } 6075 6076 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6077 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6078 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6079 return true; 6080 } 6081 6082 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6083 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6084 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6085 return true; 6086 } 6087 #endif 6088 6089 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6090 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6091 #ifdef ENABLE_CLASSIC 6092 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6093 #endif 6094 if (connection->state != SENT_DISCONNECT){ 6095 connection->state = SENT_DISCONNECT; 6096 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6097 return true; 6098 } 6099 } 6100 6101 #ifdef ENABLE_CLASSIC 6102 uint16_t sniff_min_interval; 6103 switch (connection->sniff_min_interval){ 6104 case 0: 6105 break; 6106 case 0xffff: 6107 connection->sniff_min_interval = 0; 6108 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6109 return true; 6110 default: 6111 sniff_min_interval = connection->sniff_min_interval; 6112 connection->sniff_min_interval = 0; 6113 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6114 return true; 6115 } 6116 6117 if (connection->sniff_subrating_max_latency != 0xffff){ 6118 uint16_t max_latency = connection->sniff_subrating_max_latency; 6119 connection->sniff_subrating_max_latency = 0; 6120 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6121 return true; 6122 } 6123 6124 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6125 uint8_t service_type = (uint8_t) connection->qos_service_type; 6126 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6127 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); 6128 return true; 6129 } 6130 6131 if (connection->request_role != HCI_ROLE_INVALID){ 6132 hci_role_t role = connection->request_role; 6133 connection->request_role = HCI_ROLE_INVALID; 6134 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6135 return true; 6136 } 6137 #endif 6138 6139 if (connection->gap_connection_tasks != 0){ 6140 #ifdef ENABLE_CLASSIC 6141 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6142 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6143 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6144 return true; 6145 } 6146 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6147 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6148 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6149 return true; 6150 } 6151 #endif 6152 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6153 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6154 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6155 return true; 6156 } 6157 } 6158 6159 #ifdef ENABLE_BLE 6160 switch (connection->le_con_parameter_update_state){ 6161 // response to L2CAP CON PARAMETER UPDATE REQUEST 6162 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6163 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6164 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6165 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6166 0x0000, 0xffff); 6167 return true; 6168 case CON_PARAMETER_UPDATE_REPLY: 6169 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6170 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6171 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6172 0x0000, 0xffff); 6173 return true; 6174 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6175 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6176 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6177 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6178 return true; 6179 default: 6180 break; 6181 } 6182 if (connection->le_phy_update_all_phys != 0xffu){ 6183 uint8_t all_phys = connection->le_phy_update_all_phys; 6184 connection->le_phy_update_all_phys = 0xff; 6185 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); 6186 return true; 6187 } 6188 #endif 6189 } 6190 return false; 6191 } 6192 6193 static void hci_run(void){ 6194 6195 // stack state sub statemachines 6196 switch (hci_stack->state) { 6197 case HCI_STATE_INITIALIZING: 6198 hci_initializing_run(); 6199 break; 6200 case HCI_STATE_HALTING: 6201 hci_halting_run(); 6202 break; 6203 case HCI_STATE_FALLING_ASLEEP: 6204 hci_falling_asleep_run(); 6205 break; 6206 default: 6207 break; 6208 } 6209 6210 // allow to run after initialization to working transition 6211 if (hci_stack->state != HCI_STATE_WORKING){ 6212 return; 6213 } 6214 6215 bool done; 6216 6217 // send continuation fragments first, as they block the prepared packet buffer 6218 done = hci_run_acl_fragments(); 6219 if (done) return; 6220 6221 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6222 done = hci_run_iso_fragments(); 6223 if (done) return; 6224 #endif 6225 6226 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6227 // send host num completed packets next as they don't require num_cmd_packets > 0 6228 if (!hci_can_send_comand_packet_transport()) return; 6229 if (hci_stack->host_completed_packets){ 6230 hci_host_num_completed_packets(); 6231 return; 6232 } 6233 #endif 6234 6235 if (!hci_can_send_command_packet_now()) return; 6236 6237 // global/non-connection oriented commands 6238 6239 6240 #ifdef ENABLE_CLASSIC 6241 // general gap classic 6242 done = hci_run_general_gap_classic(); 6243 if (done) return; 6244 #endif 6245 6246 #ifdef ENABLE_BLE 6247 // general gap le 6248 done = hci_run_general_gap_le(); 6249 if (done) return; 6250 #endif 6251 6252 // send pending HCI commands 6253 hci_run_general_pending_commands(); 6254 } 6255 6256 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 6257 // house-keeping 6258 6259 #ifdef ENABLE_CLASSIC 6260 bd_addr_t addr; 6261 hci_connection_t * conn; 6262 #endif 6263 #ifdef ENABLE_LE_CENTRAL 6264 uint8_t initiator_filter_policy; 6265 #endif 6266 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6267 uint8_t i; 6268 uint8_t num_cis; 6269 hci_con_handle_t cis_handle; 6270 uint8_t status; 6271 #endif 6272 6273 uint16_t opcode = little_endian_read_16(packet, 0); 6274 switch (opcode) { 6275 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 6276 hci_stack->loopback_mode = packet[3]; 6277 break; 6278 6279 #ifdef ENABLE_CLASSIC 6280 case HCI_OPCODE_HCI_CREATE_CONNECTION: 6281 reverse_bd_addr(&packet[3], addr); 6282 log_info("Create_connection to %s", bd_addr_to_str(addr)); 6283 6284 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 6285 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 6286 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 6287 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 6288 } 6289 6290 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6291 if (!conn) { 6292 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6293 if (!conn) { 6294 // notify client that alloc failed 6295 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6296 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 6297 } 6298 conn->state = SEND_CREATE_CONNECTION; 6299 conn->role = HCI_ROLE_MASTER; 6300 } 6301 6302 log_info("conn state %u", conn->state); 6303 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 6304 switch (conn->state) { 6305 // if connection active exists 6306 case OPEN: 6307 // and OPEN, emit connection complete command 6308 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 6309 // packet not sent to controller 6310 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6311 case RECEIVED_DISCONNECTION_COMPLETE: 6312 // create connection triggered in disconnect complete event, let's do it now 6313 break; 6314 case SEND_CREATE_CONNECTION: 6315 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 6316 if (hci_classic_operation_active()){ 6317 return ERROR_CODE_SUCCESS; 6318 } 6319 #endif 6320 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 6321 break; 6322 default: 6323 // otherwise, just ignore as it is already in the open process 6324 // packet not sent to controller 6325 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6326 } 6327 conn->state = SENT_CREATE_CONNECTION; 6328 6329 // track outgoing connection 6330 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 6331 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 6332 break; 6333 6334 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 6335 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 6336 // setup_synchronous_connection? Voice setting at offset 22 6337 // TODO: compare to current setting if sco connection already active 6338 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 6339 break; 6340 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 6341 // accept_synchronous_connection? Voice setting at offset 18 6342 // TODO: compare to current setting if sco connection already active 6343 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 6344 // track outgoing connection 6345 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 6346 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 6347 break; 6348 #endif 6349 #endif 6350 6351 #ifdef ENABLE_BLE 6352 #ifdef ENABLE_LE_CENTRAL 6353 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6354 // white list used? 6355 initiator_filter_policy = packet[7]; 6356 switch (initiator_filter_policy) { 6357 case 0: 6358 // whitelist not used 6359 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6360 break; 6361 case 1: 6362 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6363 break; 6364 default: 6365 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6366 break; 6367 } 6368 // track outgoing connection 6369 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6370 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6371 break; 6372 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6373 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6374 break; 6375 #endif 6376 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6377 #ifdef ENABLE_LE_CENTRAL 6378 case HCI_OPCODE_HCI_LE_CREATE_CIS: 6379 status = ERROR_CODE_SUCCESS; 6380 num_cis = packet[3]; 6381 // setup hci_iso_streams 6382 for (i=0;i<num_cis;i++){ 6383 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 4 + (4 * i)); 6384 status = hci_iso_stream_create(cis_handle); 6385 if (status != ERROR_CODE_SUCCESS) { 6386 break; 6387 } 6388 } 6389 // free structs on error 6390 if (status != ERROR_CODE_SUCCESS){ 6391 hci_iso_stream_requested_finalize(); 6392 return status; 6393 } 6394 break; 6395 #endif /* ENABLE_LE_CENTRAL */ 6396 #ifdef ENABLE_LE_PERIPHERAL 6397 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 6398 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 3); 6399 status = hci_iso_stream_create(cis_handle); 6400 if (status != ERROR_CODE_SUCCESS){ 6401 return status; 6402 } 6403 break; 6404 #endif /* ENABLE_LE_PERIPHERAL */ 6405 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6406 #endif /* ENABLE_BLE */ 6407 default: 6408 break; 6409 } 6410 6411 hci_stack->num_cmd_packets--; 6412 6413 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6414 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6415 if (err != 0){ 6416 return ERROR_CODE_HARDWARE_FAILURE; 6417 } 6418 return ERROR_CODE_SUCCESS; 6419 } 6420 6421 // disconnect because of security block 6422 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6423 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6424 if (!connection) return; 6425 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6426 } 6427 6428 6429 // Configure Secure Simple Pairing 6430 6431 #ifdef ENABLE_CLASSIC 6432 6433 // enable will enable SSP during init 6434 void gap_ssp_set_enable(int enable){ 6435 hci_stack->ssp_enable = enable; 6436 } 6437 6438 static int hci_local_ssp_activated(void){ 6439 return gap_ssp_supported() && hci_stack->ssp_enable; 6440 } 6441 6442 // if set, BTstack will respond to io capability request using authentication requirement 6443 void gap_ssp_set_io_capability(int io_capability){ 6444 hci_stack->ssp_io_capability = io_capability; 6445 } 6446 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6447 hci_stack->ssp_authentication_requirement = authentication_requirement; 6448 } 6449 6450 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6451 void gap_ssp_set_auto_accept(int auto_accept){ 6452 hci_stack->ssp_auto_accept = auto_accept; 6453 } 6454 6455 void gap_secure_connections_enable(bool enable){ 6456 hci_stack->secure_connections_enable = enable; 6457 } 6458 bool gap_secure_connections_active(void){ 6459 return hci_stack->secure_connections_active; 6460 } 6461 6462 #endif 6463 6464 // va_list part of hci_send_cmd 6465 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6466 if (!hci_can_send_command_packet_now()){ 6467 log_error("hci_send_cmd called but cannot send packet now"); 6468 return ERROR_CODE_COMMAND_DISALLOWED; 6469 } 6470 6471 // for HCI INITIALIZATION 6472 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6473 hci_stack->last_cmd_opcode = cmd->opcode; 6474 6475 hci_reserve_packet_buffer(); 6476 uint8_t * packet = hci_stack->hci_packet_buffer; 6477 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6478 uint8_t status = hci_send_cmd_packet(packet, size); 6479 6480 // release packet buffer on error or for synchronous transport implementations 6481 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6482 hci_release_packet_buffer(); 6483 hci_emit_transport_packet_sent(); 6484 } 6485 6486 return status; 6487 } 6488 6489 /** 6490 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6491 */ 6492 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6493 va_list argptr; 6494 va_start(argptr, cmd); 6495 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6496 va_end(argptr); 6497 return status; 6498 } 6499 6500 // Create various non-HCI events. 6501 // TODO: generalize, use table similar to hci_create_command 6502 6503 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6504 // dump packet 6505 if (dump) { 6506 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 6507 } 6508 6509 // dispatch to all event handlers 6510 btstack_linked_list_iterator_t it; 6511 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6512 while (btstack_linked_list_iterator_has_next(&it)){ 6513 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6514 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6515 } 6516 } 6517 6518 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6519 if (!hci_stack->acl_packet_handler) return; 6520 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6521 } 6522 6523 #ifdef ENABLE_CLASSIC 6524 static void hci_notify_if_sco_can_send_now(void){ 6525 // notify SCO sender if waiting 6526 if (!hci_stack->sco_waiting_for_can_send_now) return; 6527 if (hci_can_send_sco_packet_now()){ 6528 hci_stack->sco_waiting_for_can_send_now = 0; 6529 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6530 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6531 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6532 } 6533 } 6534 6535 // parsing end emitting has been merged to reduce code size 6536 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6537 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6538 6539 uint8_t * eir_data; 6540 ad_context_t context; 6541 const uint8_t * name; 6542 uint8_t name_len; 6543 6544 if (size < 3) return; 6545 6546 int event_type = hci_event_packet_get_type(packet); 6547 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6548 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6549 6550 switch (event_type){ 6551 case HCI_EVENT_INQUIRY_RESULT: 6552 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6553 if (size != (3 + (num_responses * 14))) return; 6554 break; 6555 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6556 if (size != 257) return; 6557 if (num_responses != 1) return; 6558 break; 6559 default: 6560 return; 6561 } 6562 6563 // event[1] is set at the end 6564 int i; 6565 for (i=0; i<num_responses;i++){ 6566 memset(event, 0, sizeof(event)); 6567 event[0] = GAP_EVENT_INQUIRY_RESULT; 6568 uint8_t event_size = 27; // if name is not set by EIR 6569 6570 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6571 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6572 (void)memcpy(&event[9], 6573 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6574 3); // class of device 6575 (void)memcpy(&event[12], 6576 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6577 2); // clock offset 6578 6579 switch (event_type){ 6580 case HCI_EVENT_INQUIRY_RESULT: 6581 // 14,15,16,17 = 0, size 18 6582 break; 6583 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6584 event[14] = 1; 6585 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6586 // 16,17 = 0, size 18 6587 break; 6588 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6589 event[14] = 1; 6590 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6591 // EIR packets only contain a single inquiry response 6592 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6593 name = NULL; 6594 // Iterate over EIR data 6595 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6596 uint8_t data_type = ad_iterator_get_data_type(&context); 6597 uint8_t data_size = ad_iterator_get_data_len(&context); 6598 const uint8_t * data = ad_iterator_get_data(&context); 6599 // Prefer Complete Local Name over Shortened Local Name 6600 switch (data_type){ 6601 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6602 if (name) continue; 6603 /* fall through */ 6604 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6605 name = data; 6606 name_len = data_size; 6607 break; 6608 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6609 if (data_size != 8) break; 6610 event[16] = 1; 6611 memcpy(&event[17], data, 8); 6612 break; 6613 default: 6614 break; 6615 } 6616 } 6617 if (name){ 6618 event[25] = 1; 6619 // truncate name if needed 6620 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6621 event[26] = len; 6622 (void)memcpy(&event[27], name, len); 6623 event_size += len; 6624 } 6625 break; 6626 default: 6627 return; 6628 } 6629 event[1] = event_size - 2; 6630 hci_emit_event(event, event_size, 1); 6631 } 6632 } 6633 #endif 6634 6635 void hci_emit_state(void){ 6636 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6637 uint8_t event[3]; 6638 event[0] = BTSTACK_EVENT_STATE; 6639 event[1] = sizeof(event) - 2u; 6640 event[2] = hci_stack->state; 6641 hci_emit_event(event, sizeof(event), 1); 6642 } 6643 6644 #ifdef ENABLE_CLASSIC 6645 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6646 uint8_t event[13]; 6647 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6648 event[1] = sizeof(event) - 2; 6649 event[2] = status; 6650 little_endian_store_16(event, 3, con_handle); 6651 reverse_bd_addr(address, &event[5]); 6652 event[11] = 1; // ACL connection 6653 event[12] = 0; // encryption disabled 6654 hci_emit_event(event, sizeof(event), 1); 6655 } 6656 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6657 if (disable_l2cap_timeouts) return; 6658 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6659 uint8_t event[4]; 6660 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6661 event[1] = sizeof(event) - 2; 6662 little_endian_store_16(event, 2, conn->con_handle); 6663 hci_emit_event(event, sizeof(event), 1); 6664 } 6665 #endif 6666 6667 #ifdef ENABLE_BLE 6668 #ifdef ENABLE_LE_CENTRAL 6669 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){ 6670 uint8_t event[21]; 6671 event[0] = HCI_EVENT_LE_META; 6672 event[1] = sizeof(event) - 2u; 6673 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6674 event[3] = status; 6675 little_endian_store_16(event, 4, con_handle); 6676 event[6] = 0; // TODO: role 6677 event[7] = address_type; 6678 reverse_bd_addr(address, &event[8]); 6679 little_endian_store_16(event, 14, 0); // interval 6680 little_endian_store_16(event, 16, 0); // latency 6681 little_endian_store_16(event, 18, 0); // supervision timeout 6682 event[20] = 0; // master clock accuracy 6683 hci_emit_event(event, sizeof(event), 1); 6684 } 6685 #endif 6686 #endif 6687 6688 static void hci_emit_transport_packet_sent(void){ 6689 // notify upper stack that it might be possible to send again 6690 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6691 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6692 } 6693 6694 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6695 uint8_t event[6]; 6696 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6697 event[1] = sizeof(event) - 2u; 6698 event[2] = 0; // status = OK 6699 little_endian_store_16(event, 3, con_handle); 6700 event[5] = reason; 6701 hci_emit_event(event, sizeof(event), 1); 6702 } 6703 6704 static void hci_emit_nr_connections_changed(void){ 6705 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6706 uint8_t event[3]; 6707 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6708 event[1] = sizeof(event) - 2u; 6709 event[2] = nr_hci_connections(); 6710 hci_emit_event(event, sizeof(event), 1); 6711 } 6712 6713 static void hci_emit_hci_open_failed(void){ 6714 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6715 uint8_t event[2]; 6716 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6717 event[1] = sizeof(event) - 2u; 6718 hci_emit_event(event, sizeof(event), 1); 6719 } 6720 6721 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6722 log_info("hci_emit_dedicated_bonding_result %u ", status); 6723 uint8_t event[9]; 6724 int pos = 0; 6725 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6726 event[pos++] = sizeof(event) - 2u; 6727 event[pos++] = status; 6728 reverse_bd_addr(address, &event[pos]); 6729 hci_emit_event(event, sizeof(event), 1); 6730 } 6731 6732 6733 #ifdef ENABLE_CLASSIC 6734 6735 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6736 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6737 uint8_t event[5]; 6738 int pos = 0; 6739 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6740 event[pos++] = sizeof(event) - 2; 6741 little_endian_store_16(event, 2, con_handle); 6742 pos += 2; 6743 event[pos++] = level; 6744 hci_emit_event(event, sizeof(event), 1); 6745 } 6746 6747 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6748 if (!connection) return LEVEL_0; 6749 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6750 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6751 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6752 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6753 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6754 // LEVEL 4 always requires 128 bit encrytion key size 6755 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6756 security_level = LEVEL_3; 6757 } 6758 return security_level; 6759 } 6760 6761 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6762 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6763 uint8_t event[3]; 6764 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6765 event[1] = sizeof(event) - 2; 6766 event[2] = enabled; 6767 hci_emit_event(event, sizeof(event), 1); 6768 } 6769 6770 // query if remote side supports eSCO 6771 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6772 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6773 if (!connection) return false; 6774 return (connection->remote_supported_features[0] & 1) != 0; 6775 } 6776 6777 static bool hci_ssp_supported(hci_connection_t * connection){ 6778 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6779 return (connection->bonding_flags & mask) == mask; 6780 } 6781 6782 // query if remote side supports SSP 6783 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6784 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6785 if (!connection) return false; 6786 return hci_ssp_supported(connection) ? 1 : 0; 6787 } 6788 6789 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6790 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6791 } 6792 6793 /** 6794 * Check if remote supported features query has completed 6795 */ 6796 bool hci_remote_features_available(hci_con_handle_t handle){ 6797 hci_connection_t * connection = hci_connection_for_handle(handle); 6798 if (!connection) return false; 6799 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6800 } 6801 6802 /** 6803 * Trigger remote supported features query 6804 */ 6805 6806 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6807 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6808 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6809 } 6810 } 6811 6812 void hci_remote_features_query(hci_con_handle_t con_handle){ 6813 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6814 if (!connection) return; 6815 hci_trigger_remote_features_for_connection(connection); 6816 hci_run(); 6817 } 6818 6819 // GAP API 6820 /** 6821 * @bbrief enable/disable bonding. default is enabled 6822 * @praram enabled 6823 */ 6824 void gap_set_bondable_mode(int enable){ 6825 hci_stack->bondable = enable ? 1 : 0; 6826 } 6827 /** 6828 * @brief Get bondable mode. 6829 * @return 1 if bondable 6830 */ 6831 int gap_get_bondable_mode(void){ 6832 return hci_stack->bondable; 6833 } 6834 6835 /** 6836 * @brief map link keys to security levels 6837 */ 6838 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6839 switch (link_key_type){ 6840 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6841 return LEVEL_4; 6842 case COMBINATION_KEY: 6843 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6844 return LEVEL_3; 6845 default: 6846 return LEVEL_2; 6847 } 6848 } 6849 6850 /** 6851 * @brief map link keys to secure connection yes/no 6852 */ 6853 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6854 switch (link_key_type){ 6855 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6856 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6857 return true; 6858 default: 6859 return false; 6860 } 6861 } 6862 6863 /** 6864 * @brief map link keys to authenticated 6865 */ 6866 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6867 switch (link_key_type){ 6868 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6869 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6870 return true; 6871 default: 6872 return false; 6873 } 6874 } 6875 6876 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6877 log_info("gap_mitm_protection_required_for_security_level %u", level); 6878 return level > LEVEL_2; 6879 } 6880 6881 /** 6882 * @brief get current security level 6883 */ 6884 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6885 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6886 if (!connection) return LEVEL_0; 6887 return gap_security_level_for_connection(connection); 6888 } 6889 6890 /** 6891 * @brief request connection to device to 6892 * @result GAP_AUTHENTICATION_RESULT 6893 */ 6894 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6895 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6896 if (!connection){ 6897 hci_emit_security_level(con_handle, LEVEL_0); 6898 return; 6899 } 6900 6901 btstack_assert(hci_is_le_connection(connection) == false); 6902 6903 // 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) 6904 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6905 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6906 requested_level = LEVEL_4; 6907 } 6908 6909 gap_security_level_t current_level = gap_security_level(con_handle); 6910 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6911 requested_level, connection->requested_security_level, current_level); 6912 6913 // authentication active if authentication request was sent or planned level > 0 6914 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6915 if (authentication_active){ 6916 // authentication already active 6917 if (connection->requested_security_level < requested_level){ 6918 // increase requested level as new level is higher 6919 // TODO: handle re-authentication when done 6920 connection->requested_security_level = requested_level; 6921 } 6922 } else { 6923 // no request active, notify if security sufficient 6924 if (requested_level <= current_level){ 6925 hci_emit_security_level(con_handle, current_level); 6926 return; 6927 } 6928 6929 // store request 6930 connection->requested_security_level = requested_level; 6931 6932 // request remote features if not already active 6933 hci_remote_features_query(con_handle); 6934 6935 // start to authenticate connection 6936 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6937 hci_run(); 6938 } 6939 } 6940 6941 /** 6942 * @brief start dedicated bonding with device. disconnect after bonding 6943 * @param device 6944 * @param request MITM protection 6945 * @result GAP_DEDICATED_BONDING_COMPLETE 6946 */ 6947 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6948 6949 // create connection state machine 6950 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6951 6952 if (!connection){ 6953 return BTSTACK_MEMORY_ALLOC_FAILED; 6954 } 6955 6956 // delete linkn key 6957 gap_drop_link_key_for_bd_addr(device); 6958 6959 // configure LEVEL_2/3, dedicated bonding 6960 connection->state = SEND_CREATE_CONNECTION; 6961 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6962 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6963 connection->bonding_flags = BONDING_DEDICATED; 6964 6965 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6966 6967 // handle: connnection failure (connection complete != ok) 6968 // handle: authentication failure 6969 // handle: disconnect on done 6970 6971 hci_run(); 6972 6973 return 0; 6974 } 6975 6976 void gap_set_local_name(const char * local_name){ 6977 hci_stack->local_name = local_name; 6978 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6979 // also update EIR if not set by user 6980 if (hci_stack->eir_data == NULL){ 6981 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6982 } 6983 hci_run(); 6984 } 6985 #endif 6986 6987 6988 #ifdef ENABLE_BLE 6989 6990 #ifdef ENABLE_LE_CENTRAL 6991 void gap_start_scan(void){ 6992 hci_stack->le_scanning_enabled = true; 6993 hci_run(); 6994 } 6995 6996 void gap_stop_scan(void){ 6997 hci_stack->le_scanning_enabled = false; 6998 hci_run(); 6999 } 7000 7001 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7002 hci_stack->le_scan_type = scan_type; 7003 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7004 hci_stack->le_scan_interval = scan_interval; 7005 hci_stack->le_scan_window = scan_window; 7006 hci_stack->le_scanning_param_update = true; 7007 hci_run(); 7008 } 7009 7010 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7011 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7012 } 7013 7014 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7015 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7016 if (!conn){ 7017 // disallow if le connection is already outgoing 7018 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7019 log_error("le connection already active"); 7020 return ERROR_CODE_COMMAND_DISALLOWED; 7021 } 7022 7023 log_info("gap_connect: no connection exists yet, creating context"); 7024 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7025 if (!conn){ 7026 // notify client that alloc failed 7027 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7028 log_info("gap_connect: failed to alloc hci_connection_t"); 7029 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7030 } 7031 7032 // set le connecting state 7033 if (hci_is_le_connection_type(addr_type)){ 7034 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7035 } 7036 7037 conn->state = SEND_CREATE_CONNECTION; 7038 log_info("gap_connect: send create connection next"); 7039 hci_run(); 7040 return ERROR_CODE_SUCCESS; 7041 } 7042 7043 if (!hci_is_le_connection(conn) || 7044 (conn->state == SEND_CREATE_CONNECTION) || 7045 (conn->state == SENT_CREATE_CONNECTION)) { 7046 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7047 log_error("gap_connect: classic connection or connect is already being created"); 7048 return GATT_CLIENT_IN_WRONG_STATE; 7049 } 7050 7051 // check if connection was just disconnected 7052 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7053 log_info("gap_connect: send create connection (again)"); 7054 conn->state = SEND_CREATE_CONNECTION; 7055 hci_run(); 7056 return ERROR_CODE_SUCCESS; 7057 } 7058 7059 log_info("gap_connect: context exists with state %u", conn->state); 7060 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7061 hci_run(); 7062 return ERROR_CODE_SUCCESS; 7063 } 7064 7065 // @assumption: only a single outgoing LE Connection exists 7066 static hci_connection_t * gap_get_outgoing_connection(void){ 7067 btstack_linked_item_t *it; 7068 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7069 hci_connection_t * conn = (hci_connection_t *) it; 7070 if (!hci_is_le_connection(conn)) continue; 7071 switch (conn->state){ 7072 case SEND_CREATE_CONNECTION: 7073 case SENT_CREATE_CONNECTION: 7074 case SENT_CANCEL_CONNECTION: 7075 return conn; 7076 default: 7077 break; 7078 }; 7079 } 7080 return NULL; 7081 } 7082 7083 uint8_t gap_connect_cancel(void){ 7084 hci_connection_t * conn = gap_get_outgoing_connection(); 7085 if (!conn) return 0; 7086 switch (conn->state){ 7087 case SEND_CREATE_CONNECTION: 7088 // skip sending create connection and emit event instead 7089 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7090 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7091 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7092 btstack_memory_hci_connection_free( conn ); 7093 break; 7094 case SENT_CREATE_CONNECTION: 7095 // request to send cancel connection 7096 conn->state = SEND_CANCEL_CONNECTION; 7097 hci_run(); 7098 break; 7099 default: 7100 break; 7101 } 7102 return 0; 7103 } 7104 7105 /** 7106 * @brief Set connection parameters for outgoing connections 7107 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7108 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7109 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7110 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7111 * @param conn_latency, default: 4 7112 * @param supervision_timeout (unit: 10ms), default: 720 ms 7113 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7114 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7115 */ 7116 7117 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7118 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7119 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7120 hci_stack->le_connection_scan_interval = conn_scan_interval; 7121 hci_stack->le_connection_scan_window = conn_scan_window; 7122 hci_stack->le_connection_interval_min = conn_interval_min; 7123 hci_stack->le_connection_interval_max = conn_interval_max; 7124 hci_stack->le_connection_latency = conn_latency; 7125 hci_stack->le_supervision_timeout = supervision_timeout; 7126 hci_stack->le_minimum_ce_length = min_ce_length; 7127 hci_stack->le_maximum_ce_length = max_ce_length; 7128 } 7129 #endif 7130 7131 /** 7132 * @brief Updates the connection parameters for a given LE connection 7133 * @param handle 7134 * @param conn_interval_min (unit: 1.25ms) 7135 * @param conn_interval_max (unit: 1.25ms) 7136 * @param conn_latency 7137 * @param supervision_timeout (unit: 10ms) 7138 * @return 0 if ok 7139 */ 7140 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7141 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7142 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7143 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7144 connection->le_conn_interval_min = conn_interval_min; 7145 connection->le_conn_interval_max = conn_interval_max; 7146 connection->le_conn_latency = conn_latency; 7147 connection->le_supervision_timeout = supervision_timeout; 7148 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7149 hci_run(); 7150 return 0; 7151 } 7152 7153 /** 7154 * @brief Request an update of the connection parameter for a given LE connection 7155 * @param handle 7156 * @param conn_interval_min (unit: 1.25ms) 7157 * @param conn_interval_max (unit: 1.25ms) 7158 * @param conn_latency 7159 * @param supervision_timeout (unit: 10ms) 7160 * @return 0 if ok 7161 */ 7162 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7163 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7164 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7165 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7166 connection->le_conn_interval_min = conn_interval_min; 7167 connection->le_conn_interval_max = conn_interval_max; 7168 connection->le_conn_latency = conn_latency; 7169 connection->le_supervision_timeout = supervision_timeout; 7170 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7171 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7172 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7173 return 0; 7174 } 7175 7176 #ifdef ENABLE_LE_PERIPHERAL 7177 7178 /** 7179 * @brief Set Advertisement Data 7180 * @param advertising_data_length 7181 * @param advertising_data (max 31 octets) 7182 * @note data is not copied, pointer has to stay valid 7183 */ 7184 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7185 hci_stack->le_advertisements_data_len = advertising_data_length; 7186 hci_stack->le_advertisements_data = advertising_data; 7187 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7188 hci_run(); 7189 } 7190 7191 /** 7192 * @brief Set Scan Response Data 7193 * @param advertising_data_length 7194 * @param advertising_data (max 31 octets) 7195 * @note data is not copied, pointer has to stay valid 7196 */ 7197 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7198 hci_stack->le_scan_response_data_len = scan_response_data_length; 7199 hci_stack->le_scan_response_data = scan_response_data; 7200 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7201 hci_run(); 7202 } 7203 7204 /** 7205 * @brief Set Advertisement Parameters 7206 * @param adv_int_min 7207 * @param adv_int_max 7208 * @param adv_type 7209 * @param direct_address_type 7210 * @param direct_address 7211 * @param channel_map 7212 * @param filter_policy 7213 * 7214 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7215 */ 7216 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7217 uint8_t direct_address_typ, bd_addr_t direct_address, 7218 uint8_t channel_map, uint8_t filter_policy) { 7219 7220 hci_stack->le_advertisements_interval_min = adv_int_min; 7221 hci_stack->le_advertisements_interval_max = adv_int_max; 7222 hci_stack->le_advertisements_type = adv_type; 7223 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7224 hci_stack->le_advertisements_channel_map = channel_map; 7225 hci_stack->le_advertisements_filter_policy = filter_policy; 7226 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7227 6); 7228 7229 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7230 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7231 hci_run(); 7232 } 7233 7234 /** 7235 * @brief Enable/Disable Advertisements 7236 * @param enabled 7237 */ 7238 void gap_advertisements_enable(int enabled){ 7239 if (enabled == 0){ 7240 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7241 } else { 7242 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 7243 } 7244 hci_update_advertisements_enabled_for_current_roles(); 7245 hci_run(); 7246 } 7247 7248 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7249 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 7250 btstack_linked_list_iterator_t it; 7251 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 7252 while (btstack_linked_list_iterator_has_next(&it)){ 7253 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 7254 if ( item->advertising_handle == advertising_handle ) { 7255 return item; 7256 } 7257 } 7258 return NULL; 7259 } 7260 7261 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 7262 // find free advertisement handle 7263 uint8_t advertisement_handle; 7264 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 7265 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 7266 } 7267 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 7268 // clear 7269 memset(storage, 0, sizeof(le_advertising_set_t)); 7270 // copy params 7271 storage->advertising_handle = advertisement_handle; 7272 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7273 // add to list 7274 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 7275 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7276 *out_advertising_handle = advertisement_handle; 7277 // set tasks and start 7278 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7279 hci_run(); 7280 return ERROR_CODE_SUCCESS; 7281 } 7282 7283 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 7284 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7285 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7286 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7287 // set tasks and start 7288 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7289 hci_run(); 7290 return ERROR_CODE_SUCCESS; 7291 } 7292 7293 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 7294 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7295 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7296 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 7297 return ERROR_CODE_SUCCESS; 7298 } 7299 7300 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 7301 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7302 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7303 memcpy(advertising_set->random_address, random_address, 6); 7304 // set tasks and start 7305 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7306 hci_run(); 7307 return ERROR_CODE_SUCCESS; 7308 } 7309 7310 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 7311 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7312 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7313 advertising_set->adv_data = advertising_data; 7314 advertising_set->adv_data_len = advertising_data_length; 7315 // set tasks and start 7316 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7317 hci_run(); 7318 return ERROR_CODE_SUCCESS; 7319 } 7320 7321 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){ 7322 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7323 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7324 advertising_set->scan_data = scan_response_data; 7325 advertising_set->scan_data_len = scan_response_data_length; 7326 // set tasks and start 7327 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7328 hci_run(); 7329 return ERROR_CODE_SUCCESS; 7330 } 7331 7332 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 7333 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7334 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7335 advertising_set->enable_timeout = timeout; 7336 advertising_set->enable_max_scan_events = num_extended_advertising_events; 7337 // set tasks and start 7338 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 7339 hci_run(); 7340 return ERROR_CODE_SUCCESS; 7341 } 7342 7343 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 7344 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7345 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7346 // set tasks and start 7347 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7348 hci_run(); 7349 return ERROR_CODE_SUCCESS; 7350 } 7351 7352 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7353 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7354 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7355 // set tasks and start 7356 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7357 hci_run(); 7358 return ERROR_CODE_SUCCESS; 7359 } 7360 7361 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7362 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 7363 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7364 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7365 // periodic advertising requires neither connectable, scannable, legacy or anonymous 7366 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7367 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 7368 // set tasks and start 7369 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 7370 hci_run(); 7371 return ERROR_CODE_SUCCESS; 7372 } 7373 7374 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 7375 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7376 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7377 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 7378 return ERROR_CODE_SUCCESS; 7379 } 7380 7381 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 7382 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7383 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7384 advertising_set->periodic_data = periodic_data; 7385 advertising_set->periodic_data_len = periodic_data_length; 7386 // set tasks and start 7387 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 7388 hci_run(); 7389 return ERROR_CODE_SUCCESS; 7390 } 7391 7392 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7393 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7394 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7395 // set tasks and start 7396 advertising_set->periodic_include_adi = include_adi; 7397 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7398 hci_run(); 7399 return ERROR_CODE_SUCCESS; 7400 } 7401 7402 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7403 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7404 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7405 // set tasks and start 7406 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7407 hci_run(); 7408 return ERROR_CODE_SUCCESS; 7409 } 7410 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 7411 7412 #endif 7413 7414 #endif 7415 7416 void hci_le_set_own_address_type(uint8_t own_address_type){ 7417 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7418 if (own_address_type == hci_stack->le_own_addr_type) return; 7419 hci_stack->le_own_addr_type = own_address_type; 7420 7421 #ifdef ENABLE_LE_PERIPHERAL 7422 // update advertisement parameters, too 7423 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7424 hci_run(); 7425 #endif 7426 #ifdef ENABLE_LE_CENTRAL 7427 // note: we don't update scan parameters or modify ongoing connection attempts 7428 #endif 7429 } 7430 7431 void hci_le_random_address_set(const bd_addr_t random_address){ 7432 memcpy(hci_stack->le_random_address, random_address, 6); 7433 hci_stack->le_random_address_set = true; 7434 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7435 hci_run(); 7436 } 7437 7438 #endif 7439 7440 uint8_t gap_disconnect(hci_con_handle_t handle){ 7441 hci_connection_t * conn = hci_connection_for_handle(handle); 7442 if (!conn){ 7443 hci_emit_disconnection_complete(handle, 0); 7444 return 0; 7445 } 7446 // ignore if already disconnected 7447 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7448 return 0; 7449 } 7450 conn->state = SEND_DISCONNECT; 7451 hci_run(); 7452 return 0; 7453 } 7454 7455 int gap_read_rssi(hci_con_handle_t con_handle){ 7456 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7457 if (hci_connection == NULL) return 0; 7458 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7459 hci_run(); 7460 return 1; 7461 } 7462 7463 /** 7464 * @brief Get connection type 7465 * @param con_handle 7466 * @result connection_type 7467 */ 7468 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7469 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7470 if (!conn) return GAP_CONNECTION_INVALID; 7471 switch (conn->address_type){ 7472 case BD_ADDR_TYPE_LE_PUBLIC: 7473 case BD_ADDR_TYPE_LE_RANDOM: 7474 return GAP_CONNECTION_LE; 7475 case BD_ADDR_TYPE_SCO: 7476 return GAP_CONNECTION_SCO; 7477 case BD_ADDR_TYPE_ACL: 7478 return GAP_CONNECTION_ACL; 7479 default: 7480 return GAP_CONNECTION_INVALID; 7481 } 7482 } 7483 7484 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7485 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7486 if (!conn) return HCI_ROLE_INVALID; 7487 return (hci_role_t) conn->role; 7488 } 7489 7490 7491 #ifdef ENABLE_CLASSIC 7492 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7493 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7494 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7495 conn->request_role = role; 7496 hci_run(); 7497 return ERROR_CODE_SUCCESS; 7498 } 7499 #endif 7500 7501 #ifdef ENABLE_BLE 7502 7503 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){ 7504 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7505 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7506 7507 conn->le_phy_update_all_phys = all_phys; 7508 conn->le_phy_update_tx_phys = tx_phys; 7509 conn->le_phy_update_rx_phys = rx_phys; 7510 conn->le_phy_update_phy_options = phy_options; 7511 7512 hci_run(); 7513 7514 return 0; 7515 } 7516 7517 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7518 // check if already in list 7519 btstack_linked_list_iterator_t it; 7520 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7521 while (btstack_linked_list_iterator_has_next(&it)) { 7522 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7523 if (entry->address_type != address_type) { 7524 continue; 7525 } 7526 if (memcmp(entry->address, address, 6) != 0) { 7527 continue; 7528 } 7529 // disallow if already scheduled to add 7530 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7531 return ERROR_CODE_COMMAND_DISALLOWED; 7532 } 7533 // still on controller, but scheduled to remove -> re-add 7534 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7535 return ERROR_CODE_SUCCESS; 7536 } 7537 // alloc and add to list 7538 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7539 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7540 entry->address_type = address_type; 7541 (void)memcpy(entry->address, address, 6); 7542 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7543 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7544 return ERROR_CODE_SUCCESS; 7545 } 7546 7547 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7548 btstack_linked_list_iterator_t it; 7549 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7550 while (btstack_linked_list_iterator_has_next(&it)){ 7551 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7552 if (entry->address_type != address_type) { 7553 continue; 7554 } 7555 if (memcmp(entry->address, address, 6) != 0) { 7556 continue; 7557 } 7558 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7559 // remove from controller if already present 7560 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7561 } else { 7562 // directly remove entry from whitelist 7563 btstack_linked_list_iterator_remove(&it); 7564 btstack_memory_whitelist_entry_free(entry); 7565 } 7566 return ERROR_CODE_SUCCESS; 7567 } 7568 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7569 } 7570 7571 static void hci_whitelist_clear(void){ 7572 btstack_linked_list_iterator_t it; 7573 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7574 while (btstack_linked_list_iterator_has_next(&it)){ 7575 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7576 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7577 // remove from controller if already present 7578 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7579 continue; 7580 } 7581 // directly remove entry from whitelist 7582 btstack_linked_list_iterator_remove(&it); 7583 btstack_memory_whitelist_entry_free(entry); 7584 } 7585 } 7586 7587 // free all entries unconditionally 7588 static void hci_whitelist_free(void){ 7589 btstack_linked_list_iterator_t lit; 7590 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7591 while (btstack_linked_list_iterator_has_next(&lit)){ 7592 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7593 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7594 btstack_memory_whitelist_entry_free(entry); 7595 } 7596 } 7597 7598 /** 7599 * @brief Clear Whitelist 7600 * @return 0 if ok 7601 */ 7602 uint8_t gap_whitelist_clear(void){ 7603 hci_whitelist_clear(); 7604 hci_run(); 7605 return ERROR_CODE_SUCCESS; 7606 } 7607 7608 /** 7609 * @brief Add Device to Whitelist 7610 * @param address_typ 7611 * @param address 7612 * @return 0 if ok 7613 */ 7614 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7615 uint8_t status = hci_whitelist_add(address_type, address); 7616 if (status){ 7617 return status; 7618 } 7619 hci_run(); 7620 return ERROR_CODE_SUCCESS; 7621 } 7622 7623 /** 7624 * @brief Remove Device from Whitelist 7625 * @param address_typ 7626 * @param address 7627 * @return 0 if ok 7628 */ 7629 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7630 uint8_t status = hci_whitelist_remove(address_type, address); 7631 if (status){ 7632 return status; 7633 } 7634 hci_run(); 7635 return ERROR_CODE_SUCCESS; 7636 } 7637 7638 #ifdef ENABLE_LE_CENTRAL 7639 /** 7640 * @brief Connect with Whitelist 7641 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7642 * @return - if ok 7643 */ 7644 uint8_t gap_connect_with_whitelist(void){ 7645 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7646 return ERROR_CODE_COMMAND_DISALLOWED; 7647 } 7648 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7649 hci_run(); 7650 return ERROR_CODE_SUCCESS; 7651 } 7652 7653 /** 7654 * @brief Auto Connection Establishment - Start Connecting to device 7655 * @param address_typ 7656 * @param address 7657 * @return 0 if ok 7658 */ 7659 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7660 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7661 return ERROR_CODE_COMMAND_DISALLOWED; 7662 } 7663 7664 uint8_t status = hci_whitelist_add(address_type, address); 7665 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7666 return status; 7667 } 7668 7669 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7670 7671 hci_run(); 7672 return ERROR_CODE_SUCCESS; 7673 } 7674 7675 /** 7676 * @brief Auto Connection Establishment - Stop Connecting to device 7677 * @param address_typ 7678 * @param address 7679 * @return 0 if ok 7680 */ 7681 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7682 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7683 return ERROR_CODE_COMMAND_DISALLOWED; 7684 } 7685 7686 hci_whitelist_remove(address_type, address); 7687 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7688 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7689 } 7690 hci_run(); 7691 return 0; 7692 } 7693 7694 /** 7695 * @brief Auto Connection Establishment - Stop everything 7696 * @note Convenience function to stop all active auto connection attempts 7697 */ 7698 uint8_t gap_auto_connection_stop_all(void){ 7699 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7700 return ERROR_CODE_COMMAND_DISALLOWED; 7701 } 7702 hci_whitelist_clear(); 7703 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7704 hci_run(); 7705 return ERROR_CODE_SUCCESS; 7706 } 7707 7708 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7709 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7710 if (!conn) return 0; 7711 return conn->le_connection_interval; 7712 } 7713 #endif 7714 #endif 7715 7716 #ifdef ENABLE_CLASSIC 7717 /** 7718 * @brief Set Extended Inquiry Response data 7719 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7720 * @note has to be done before stack starts up 7721 */ 7722 void gap_set_extended_inquiry_response(const uint8_t * data){ 7723 hci_stack->eir_data = data; 7724 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7725 hci_run(); 7726 } 7727 7728 /** 7729 * @brief Start GAP Classic Inquiry 7730 * @param duration in 1.28s units 7731 * @return 0 if ok 7732 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7733 */ 7734 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7735 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7736 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7737 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7738 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7739 } 7740 hci_stack->inquiry_state = duration_in_1280ms_units; 7741 hci_stack->inquiry_max_period_length = 0; 7742 hci_stack->inquiry_min_period_length = 0; 7743 hci_run(); 7744 return 0; 7745 } 7746 7747 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 7748 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7749 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7750 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7751 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7752 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7753 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7754 7755 hci_stack->inquiry_state = duration; 7756 hci_stack->inquiry_max_period_length = max_period_length; 7757 hci_stack->inquiry_min_period_length = min_period_length; 7758 hci_run(); 7759 return 0; 7760 } 7761 7762 /** 7763 * @brief Stop GAP Classic Inquiry 7764 * @return 0 if ok 7765 */ 7766 int gap_inquiry_stop(void){ 7767 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7768 // emit inquiry complete event, before it even started 7769 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7770 hci_emit_event(event, sizeof(event), 1); 7771 return 0; 7772 } 7773 switch (hci_stack->inquiry_state){ 7774 case GAP_INQUIRY_STATE_ACTIVE: 7775 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7776 hci_run(); 7777 return ERROR_CODE_SUCCESS; 7778 case GAP_INQUIRY_STATE_PERIODIC: 7779 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 7780 hci_run(); 7781 return ERROR_CODE_SUCCESS; 7782 default: 7783 return ERROR_CODE_COMMAND_DISALLOWED; 7784 } 7785 } 7786 7787 void gap_inquiry_set_lap(uint32_t lap){ 7788 hci_stack->inquiry_lap = lap; 7789 } 7790 7791 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7792 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7793 hci_stack->inquiry_scan_window = inquiry_scan_window; 7794 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7795 hci_run(); 7796 } 7797 7798 7799 /** 7800 * @brief Remote Name Request 7801 * @param addr 7802 * @param page_scan_repetition_mode 7803 * @param clock_offset only used when bit 15 is set 7804 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7805 */ 7806 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7807 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7808 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7809 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7810 hci_stack->remote_name_clock_offset = clock_offset; 7811 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7812 hci_run(); 7813 return 0; 7814 } 7815 7816 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7817 hci_stack->gap_pairing_state = state; 7818 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7819 hci_run(); 7820 return 0; 7821 } 7822 7823 /** 7824 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7825 * @param addr 7826 * @param pin_data 7827 * @param pin_len 7828 * @return 0 if ok 7829 */ 7830 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7831 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7832 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7833 hci_stack->gap_pairing_pin_len = pin_len; 7834 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7835 } 7836 7837 /** 7838 * @brief Legacy Pairing Pin Code Response 7839 * @param addr 7840 * @param pin 7841 * @return 0 if ok 7842 */ 7843 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7844 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7845 } 7846 7847 /** 7848 * @brief Abort Legacy Pairing 7849 * @param addr 7850 * @param pin 7851 * @return 0 if ok 7852 */ 7853 int gap_pin_code_negative(bd_addr_t addr){ 7854 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7855 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7856 } 7857 7858 /** 7859 * @brief SSP Passkey Response 7860 * @param addr 7861 * @param passkey 7862 * @return 0 if ok 7863 */ 7864 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7865 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7866 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7867 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7868 } 7869 7870 /** 7871 * @brief Abort SSP Passkey Entry/Pairing 7872 * @param addr 7873 * @param pin 7874 * @return 0 if ok 7875 */ 7876 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7877 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7878 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7879 } 7880 7881 /** 7882 * @brief Accept SSP Numeric Comparison 7883 * @param addr 7884 * @param passkey 7885 * @return 0 if ok 7886 */ 7887 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7888 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7889 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7890 } 7891 7892 /** 7893 * @brief Abort SSP Numeric Comparison/Pairing 7894 * @param addr 7895 * @param pin 7896 * @return 0 if ok 7897 */ 7898 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7899 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7900 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7901 } 7902 7903 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7904 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7905 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7906 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7907 connectionSetAuthenticationFlags(conn, flag); 7908 hci_run(); 7909 return ERROR_CODE_SUCCESS; 7910 } 7911 #endif 7912 7913 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7914 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7915 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7916 } 7917 7918 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7919 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7920 } 7921 #endif 7922 7923 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7924 /** 7925 * @brief Report Remote OOB Data 7926 * @param bd_addr 7927 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7928 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7929 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7930 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7931 */ 7932 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){ 7933 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7934 if (connection == NULL) { 7935 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7936 } 7937 connection->classic_oob_c_192 = c_192; 7938 connection->classic_oob_r_192 = r_192; 7939 7940 // ignore P-256 if not supported by us 7941 if (hci_stack->secure_connections_active){ 7942 connection->classic_oob_c_256 = c_256; 7943 connection->classic_oob_r_256 = r_256; 7944 } 7945 7946 return ERROR_CODE_SUCCESS; 7947 } 7948 /** 7949 * @brief Generate new OOB data 7950 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7951 */ 7952 void gap_ssp_generate_oob_data(void){ 7953 hci_stack->classic_read_local_oob_data = true; 7954 hci_run(); 7955 } 7956 7957 #endif 7958 7959 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7960 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7961 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7962 if (connection == NULL) { 7963 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7964 } 7965 7966 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7967 connection->link_key_type = type; 7968 7969 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7970 } 7971 7972 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7973 /** 7974 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7975 * @param inquiry_mode see bluetooth_defines.h 7976 */ 7977 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7978 hci_stack->inquiry_mode = inquiry_mode; 7979 } 7980 7981 /** 7982 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7983 */ 7984 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7985 hci_stack->sco_voice_setting = voice_setting; 7986 } 7987 7988 /** 7989 * @brief Get SCO Voice Setting 7990 * @return current voice setting 7991 */ 7992 uint16_t hci_get_sco_voice_setting(void){ 7993 return hci_stack->sco_voice_setting; 7994 } 7995 7996 static int hci_have_usb_transport(void){ 7997 if (!hci_stack->hci_transport) return 0; 7998 const char * transport_name = hci_stack->hci_transport->name; 7999 if (!transport_name) return 0; 8000 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8001 } 8002 8003 /** @brief Get SCO packet length for current SCO Voice setting 8004 * @note Using SCO packets of the exact length is required for USB transfer 8005 * @return Length of SCO packets in bytes (not audio frames) 8006 */ 8007 uint16_t hci_get_sco_packet_length(void){ 8008 uint16_t sco_packet_length = 0; 8009 8010 #ifdef ENABLE_SCO_OVER_HCI 8011 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8012 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8013 8014 if (hci_have_usb_transport()){ 8015 // see Core Spec for H2 USB Transfer. 8016 // 3 byte SCO header + 24 bytes per connection 8017 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8018 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8019 } else { 8020 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8021 sco_packet_length = 3 + 60 * multiplier; 8022 // assert that it still fits inside an SCO buffer 8023 if (sco_packet_length > hci_stack->sco_data_packet_length){ 8024 sco_packet_length = 3 + 60; 8025 } 8026 } 8027 #endif 8028 8029 #ifdef HAVE_SCO_TRANSPORT 8030 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8031 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8032 sco_packet_length = 3 + 60 * multiplier; 8033 #endif 8034 return sco_packet_length; 8035 } 8036 8037 /** 8038 * @brief Sets the master/slave policy 8039 * @param policy (0: attempt to become master, 1: let connecting device decide) 8040 */ 8041 void hci_set_master_slave_policy(uint8_t policy){ 8042 hci_stack->master_slave_policy = policy; 8043 } 8044 8045 #endif 8046 8047 HCI_STATE hci_get_state(void){ 8048 return hci_stack->state; 8049 } 8050 8051 #ifdef ENABLE_CLASSIC 8052 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8053 hci_stack->gap_classic_accept_callback = accept_callback; 8054 } 8055 #endif 8056 8057 /** 8058 * @brief Set callback for Bluetooth Hardware Error 8059 */ 8060 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8061 hci_stack->hardware_error_callback = fn; 8062 } 8063 8064 void hci_disconnect_all(void){ 8065 btstack_linked_list_iterator_t it; 8066 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8067 while (btstack_linked_list_iterator_has_next(&it)){ 8068 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8069 if (con->state == SENT_DISCONNECT) continue; 8070 con->state = SEND_DISCONNECT; 8071 } 8072 hci_run(); 8073 } 8074 8075 uint16_t hci_get_manufacturer(void){ 8076 return hci_stack->manufacturer; 8077 } 8078 8079 #ifdef ENABLE_BLE 8080 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8081 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8082 if (!hci_con) return NULL; 8083 return &hci_con->sm_connection; 8084 } 8085 8086 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8087 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8088 #endif 8089 8090 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8091 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8092 if (hci_connection == NULL) return 0; 8093 if (hci_is_le_connection(hci_connection)){ 8094 #ifdef ENABLE_BLE 8095 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8096 if (sm_conn->sm_connection_encrypted) { 8097 return sm_conn->sm_actual_encryption_key_size; 8098 } 8099 #endif 8100 } else { 8101 #ifdef ENABLE_CLASSIC 8102 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8103 return hci_connection->encryption_key_size; 8104 } 8105 #endif 8106 } 8107 return 0; 8108 } 8109 8110 bool gap_authenticated(hci_con_handle_t con_handle){ 8111 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8112 if (hci_connection == NULL) return false; 8113 8114 switch (hci_connection->address_type){ 8115 #ifdef ENABLE_BLE 8116 case BD_ADDR_TYPE_LE_PUBLIC: 8117 case BD_ADDR_TYPE_LE_RANDOM: 8118 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8119 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8120 #endif 8121 #ifdef ENABLE_CLASSIC 8122 case BD_ADDR_TYPE_SCO: 8123 case BD_ADDR_TYPE_ACL: 8124 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8125 #endif 8126 default: 8127 return false; 8128 } 8129 } 8130 8131 bool gap_secure_connection(hci_con_handle_t con_handle){ 8132 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8133 if (hci_connection == NULL) return 0; 8134 8135 switch (hci_connection->address_type){ 8136 #ifdef ENABLE_BLE 8137 case BD_ADDR_TYPE_LE_PUBLIC: 8138 case BD_ADDR_TYPE_LE_RANDOM: 8139 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8140 return hci_connection->sm_connection.sm_connection_sc != 0; 8141 #endif 8142 #ifdef ENABLE_CLASSIC 8143 case BD_ADDR_TYPE_SCO: 8144 case BD_ADDR_TYPE_ACL: 8145 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8146 #endif 8147 default: 8148 return false; 8149 } 8150 } 8151 8152 bool gap_bonded(hci_con_handle_t con_handle){ 8153 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8154 if (hci_connection == NULL) return 0; 8155 8156 #ifdef ENABLE_CLASSIC 8157 link_key_t link_key; 8158 link_key_type_t link_key_type; 8159 #endif 8160 switch (hci_connection->address_type){ 8161 #ifdef ENABLE_BLE 8162 case BD_ADDR_TYPE_LE_PUBLIC: 8163 case BD_ADDR_TYPE_LE_RANDOM: 8164 return hci_connection->sm_connection.sm_le_db_index >= 0; 8165 #endif 8166 #ifdef ENABLE_CLASSIC 8167 case BD_ADDR_TYPE_SCO: 8168 case BD_ADDR_TYPE_ACL: 8169 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8170 #endif 8171 default: 8172 return false; 8173 } 8174 } 8175 8176 #ifdef ENABLE_BLE 8177 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8178 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8179 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8180 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8181 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8182 return sm_conn->sm_connection_authorization_state; 8183 } 8184 #endif 8185 8186 #ifdef ENABLE_CLASSIC 8187 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){ 8188 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8189 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8190 conn->sniff_min_interval = sniff_min_interval; 8191 conn->sniff_max_interval = sniff_max_interval; 8192 conn->sniff_attempt = sniff_attempt; 8193 conn->sniff_timeout = sniff_timeout; 8194 hci_run(); 8195 return 0; 8196 } 8197 8198 /** 8199 * @brief Exit Sniff mode 8200 * @param con_handle 8201 @ @return 0 if ok 8202 */ 8203 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8204 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8205 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8206 conn->sniff_min_interval = 0xffff; 8207 hci_run(); 8208 return 0; 8209 } 8210 8211 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){ 8212 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8213 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8214 conn->sniff_subrating_max_latency = max_latency; 8215 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8216 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8217 hci_run(); 8218 return ERROR_CODE_SUCCESS; 8219 } 8220 8221 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){ 8222 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8223 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8224 conn->qos_service_type = service_type; 8225 conn->qos_token_rate = token_rate; 8226 conn->qos_peak_bandwidth = peak_bandwidth; 8227 conn->qos_latency = latency; 8228 conn->qos_delay_variation = delay_variation; 8229 hci_run(); 8230 return ERROR_CODE_SUCCESS; 8231 } 8232 8233 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 8234 hci_stack->new_page_scan_interval = page_scan_interval; 8235 hci_stack->new_page_scan_window = page_scan_window; 8236 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 8237 hci_run(); 8238 } 8239 8240 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 8241 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 8242 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 8243 hci_run(); 8244 } 8245 8246 void gap_set_page_timeout(uint16_t page_timeout){ 8247 hci_stack->page_timeout = page_timeout; 8248 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 8249 hci_run(); 8250 } 8251 8252 #endif 8253 8254 void hci_halting_defer(void){ 8255 if (hci_stack->state != HCI_STATE_HALTING) return; 8256 switch (hci_stack->substate){ 8257 case HCI_HALTING_READY_FOR_CLOSE: 8258 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 8259 break; 8260 default: 8261 break; 8262 } 8263 } 8264 8265 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 8266 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 8267 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8268 if (le_device_db_index >= le_device_db_max_count()) return; 8269 uint8_t offset = le_device_db_index >> 3; 8270 uint8_t mask = 1 << (le_device_db_index & 7); 8271 hci_stack->le_resolving_list_add_entries[offset] |= mask; 8272 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8273 // note: go back to remove entries, otherwise, a remove + add will skip the add 8274 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8275 } 8276 } 8277 8278 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 8279 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8280 if (le_device_db_index >= le_device_db_max_count()) return; 8281 uint8_t offset = le_device_db_index >> 3; 8282 uint8_t mask = 1 << (le_device_db_index & 7); 8283 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 8284 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8285 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8286 } 8287 } 8288 8289 uint8_t gap_load_resolving_list_from_le_device_db(void){ 8290 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 8291 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 8292 } 8293 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 8294 // restart le resolving list update 8295 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 8296 } 8297 return ERROR_CODE_SUCCESS; 8298 } 8299 #endif 8300 8301 #ifdef ENABLE_BLE 8302 #ifdef ENABLE_LE_CENTRAL 8303 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8304 8305 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8306 // check if already in list 8307 btstack_linked_list_iterator_t it; 8308 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8309 while (btstack_linked_list_iterator_has_next(&it)) { 8310 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 8311 if (entry->sid != advertising_sid) { 8312 continue; 8313 } 8314 if (entry->address_type != address_type) { 8315 continue; 8316 } 8317 if (memcmp(entry->address, address, 6) != 0) { 8318 continue; 8319 } 8320 // disallow if already scheduled to add 8321 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 8322 return ERROR_CODE_COMMAND_DISALLOWED; 8323 } 8324 // still on controller, but scheduled to remove -> re-add 8325 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8326 return ERROR_CODE_SUCCESS; 8327 } 8328 // alloc and add to list 8329 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 8330 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8331 entry->sid = advertising_sid; 8332 entry->address_type = address_type; 8333 (void)memcpy(entry->address, address, 6); 8334 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8335 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 8336 return ERROR_CODE_SUCCESS; 8337 } 8338 8339 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8340 btstack_linked_list_iterator_t it; 8341 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8342 while (btstack_linked_list_iterator_has_next(&it)){ 8343 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8344 if (entry->sid != advertising_sid) { 8345 continue; 8346 } 8347 if (entry->address_type != address_type) { 8348 continue; 8349 } 8350 if (memcmp(entry->address, address, 6) != 0) { 8351 continue; 8352 } 8353 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8354 // remove from controller if already present 8355 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8356 } else { 8357 // directly remove entry from whitelist 8358 btstack_linked_list_iterator_remove(&it); 8359 btstack_memory_periodic_advertiser_list_entry_free(entry); 8360 } 8361 return ERROR_CODE_SUCCESS; 8362 } 8363 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8364 } 8365 8366 static void hci_periodic_advertiser_list_clear(void){ 8367 btstack_linked_list_iterator_t it; 8368 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8369 while (btstack_linked_list_iterator_has_next(&it)){ 8370 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8371 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8372 // remove from controller if already present 8373 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8374 continue; 8375 } 8376 // directly remove entry from whitelist 8377 btstack_linked_list_iterator_remove(&it); 8378 btstack_memory_periodic_advertiser_list_entry_free(entry); 8379 } 8380 } 8381 8382 // free all entries unconditionally 8383 static void hci_periodic_advertiser_list_free(void){ 8384 btstack_linked_list_iterator_t lit; 8385 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 8386 while (btstack_linked_list_iterator_has_next(&lit)){ 8387 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 8388 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 8389 btstack_memory_periodic_advertiser_list_entry_free(entry); 8390 } 8391 } 8392 8393 uint8_t gap_periodic_advertiser_list_clear(void){ 8394 hci_periodic_advertiser_list_clear(); 8395 hci_run(); 8396 return ERROR_CODE_SUCCESS; 8397 } 8398 8399 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8400 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 8401 if (status){ 8402 return status; 8403 } 8404 hci_run(); 8405 return ERROR_CODE_SUCCESS; 8406 } 8407 8408 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8409 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 8410 if (status){ 8411 return status; 8412 } 8413 hci_run(); 8414 return ERROR_CODE_SUCCESS; 8415 } 8416 8417 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 8418 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 8419 // abort if already active 8420 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 8421 return ERROR_CODE_COMMAND_DISALLOWED; 8422 } 8423 // store request 8424 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 8425 hci_stack->le_periodic_sync_options = options; 8426 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 8427 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 8428 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 8429 hci_stack->le_periodic_sync_skip = skip; 8430 hci_stack->le_periodic_sync_timeout = sync_timeout; 8431 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 8432 8433 hci_run(); 8434 return ERROR_CODE_SUCCESS; 8435 } 8436 8437 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 8438 // abort if not requested 8439 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 8440 return ERROR_CODE_COMMAND_DISALLOWED; 8441 } 8442 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 8443 hci_run(); 8444 return ERROR_CODE_SUCCESS; 8445 } 8446 8447 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 8448 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 8449 return ERROR_CODE_COMMAND_DISALLOWED; 8450 } 8451 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 8452 hci_run(); 8453 return ERROR_CODE_SUCCESS; 8454 } 8455 8456 #endif 8457 #endif 8458 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 8459 static uint8_t hci_iso_stream_create(hci_con_handle_t cis_handle){ 8460 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 8461 if (iso_stream == NULL){ 8462 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8463 } else { 8464 iso_stream->state = HCI_ISO_STREAM_STATE_REQUESTED; 8465 iso_stream->con_handle = cis_handle; 8466 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8467 return ERROR_CODE_SUCCESS; 8468 } 8469 } 8470 8471 static hci_iso_stream_t * hci_iso_stream_for_cis_handle(hci_con_handle_t cis_handle){ 8472 btstack_linked_list_iterator_t it; 8473 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8474 while (btstack_linked_list_iterator_has_next(&it)){ 8475 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8476 if ( iso_stream->con_handle == cis_handle ) { 8477 return iso_stream; 8478 } 8479 } 8480 return NULL; 8481 } 8482 8483 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 8484 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8485 btstack_memory_hci_iso_stream_free(iso_stream); 8486 } 8487 8488 static void hci_iso_stream_requested_finalize(void){ 8489 btstack_linked_list_iterator_t it; 8490 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8491 while (btstack_linked_list_iterator_has_next(&it)){ 8492 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8493 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8494 btstack_linked_list_iterator_remove(&it); 8495 btstack_memory_hci_iso_stream_free(iso_stream); 8496 } 8497 } 8498 } 8499 static void hci_iso_stream_requested_confirm(void){ 8500 btstack_linked_list_iterator_t it; 8501 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8502 while (btstack_linked_list_iterator_has_next(&it)){ 8503 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8504 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8505 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 8506 } 8507 } 8508 } 8509 8510 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 8511 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 8512 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 8513 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 8514 return (sdu_len_offset + 2 + sdu_len) == size; 8515 } 8516 8517 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 8518 if (hci_stack->iso_packet_handler == NULL) { 8519 return; 8520 } 8521 if (size < 4) { 8522 return; 8523 } 8524 8525 // parse header 8526 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 8527 uint16_t iso_data_len = little_endian_read_16(packet, 2); 8528 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 8529 hci_iso_stream_t * iso_stream = hci_iso_stream_for_cis_handle(cis_handle); 8530 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 8531 8532 // assert packet is complete 8533 if ((iso_data_len + 4u) != size){ 8534 return; 8535 } 8536 8537 if ((pb_flag & 0x01) == 0){ 8538 if (pb_flag == 0x02){ 8539 // The ISO_Data_Load field contains a header and a complete SDU. 8540 if (hci_iso_sdu_complete(packet, size)) { 8541 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 8542 } 8543 } else { 8544 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 8545 if (iso_stream == NULL){ 8546 return; 8547 } 8548 if (size > HCI_ISO_PAYLOAD_SIZE){ 8549 return; 8550 } 8551 memcpy(iso_stream->reassembly_buffer, packet, size); 8552 // fix pb_flag 8553 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 8554 iso_stream->reassembly_pos = size; 8555 } 8556 } else { 8557 // iso_data_load contains continuation or last fragment of an SDU 8558 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 8559 if (ts_flag != 0){ 8560 return; 8561 } 8562 // append fragment 8563 if (iso_stream == NULL){ 8564 return; 8565 } 8566 if (iso_stream->reassembly_pos == 0){ 8567 return; 8568 } 8569 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 8570 // reset reassembly buffer 8571 iso_stream->reassembly_pos = 0; 8572 return; 8573 } 8574 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 8575 iso_stream->reassembly_pos += iso_data_len; 8576 8577 // deliver if last fragment and SDU complete 8578 if (pb_flag == 0x03){ 8579 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 8580 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 8581 } 8582 iso_stream->reassembly_pos = 0; 8583 } 8584 } 8585 } 8586 8587 8588 #endif 8589 #endif /* ENABLE_BLE */ 8590 8591 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 8592 void hci_setup_test_connections_fuzz(void){ 8593 hci_connection_t * conn; 8594 8595 // default address: 66:55:44:33:00:01 8596 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 8597 8598 // setup Controller info 8599 hci_stack->num_cmd_packets = 255; 8600 hci_stack->acl_packets_total_num = 255; 8601 8602 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 8603 addr[5] = 0x01; 8604 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8605 conn->con_handle = addr[5]; 8606 conn->role = HCI_ROLE_SLAVE; 8607 conn->state = RECEIVED_CONNECTION_REQUEST; 8608 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8609 8610 // setup incoming Classic SCO connection with con handle 0x0002 8611 addr[5] = 0x02; 8612 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8613 conn->con_handle = addr[5]; 8614 conn->role = HCI_ROLE_SLAVE; 8615 conn->state = RECEIVED_CONNECTION_REQUEST; 8616 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8617 8618 // setup ready Classic ACL connection with con handle 0x0003 8619 addr[5] = 0x03; 8620 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8621 conn->con_handle = addr[5]; 8622 conn->role = HCI_ROLE_SLAVE; 8623 conn->state = OPEN; 8624 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8625 8626 // setup ready Classic SCO connection with con handle 0x0004 8627 addr[5] = 0x04; 8628 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8629 conn->con_handle = addr[5]; 8630 conn->role = HCI_ROLE_SLAVE; 8631 conn->state = OPEN; 8632 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8633 8634 // setup ready LE ACL connection with con handle 0x005 and public address 8635 addr[5] = 0x05; 8636 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 8637 conn->con_handle = addr[5]; 8638 conn->role = HCI_ROLE_SLAVE; 8639 conn->state = OPEN; 8640 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8641 conn->sm_connection.sm_connection_encrypted = 1; 8642 } 8643 8644 void hci_free_connections_fuzz(void){ 8645 btstack_linked_list_iterator_t it; 8646 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8647 while (btstack_linked_list_iterator_has_next(&it)){ 8648 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8649 btstack_linked_list_iterator_remove(&it); 8650 btstack_memory_hci_connection_free(con); 8651 } 8652 } 8653 void hci_simulate_working_fuzz(void){ 8654 hci_stack->le_scanning_param_update = false; 8655 hci_init_done(); 8656 hci_stack->num_cmd_packets = 255; 8657 } 8658 #endif 8659