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 static void handle_command_status_event(uint8_t * packet, uint16_t size) { 2742 UNUSED(size); 2743 2744 // get num cmd packets - limit to 1 to reduce complexity 2745 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2746 2747 // get opcode and command status 2748 uint16_t opcode = hci_event_command_status_get_command_opcode(packet); 2749 2750 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) || defined(ENABLE_LE_ISOCHRONOUS_STREAMS) 2751 uint8_t status = hci_event_command_status_get_status(packet); 2752 #endif 2753 2754 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2755 bd_addr_type_t addr_type; 2756 #endif 2757 2758 switch (opcode){ 2759 #ifdef ENABLE_CLASSIC 2760 case HCI_OPCODE_HCI_CREATE_CONNECTION: 2761 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 2762 #endif 2763 #ifdef ENABLE_LE_CENTRAL 2764 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 2765 #endif 2766 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2767 addr_type = hci_stack->outgoing_addr_type; 2768 2769 // reset outgoing address info 2770 memset(hci_stack->outgoing_addr, 0, 6); 2771 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2772 2773 // on error 2774 if (status != ERROR_CODE_SUCCESS){ 2775 #ifdef ENABLE_LE_CENTRAL 2776 if (hci_is_le_connection_type(addr_type)){ 2777 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2778 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2779 } 2780 #endif 2781 // error => outgoing connection failed 2782 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2783 if (conn != NULL){ 2784 hci_handle_connection_failed(conn, status); 2785 } 2786 } 2787 break; 2788 #endif 2789 #ifdef ENABLE_CLASSIC 2790 case HCI_OPCODE_HCI_INQUIRY: 2791 if (status == ERROR_CODE_SUCCESS) { 2792 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2793 } else { 2794 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2795 } 2796 break; 2797 #endif 2798 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2799 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2800 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2801 if (status == ERROR_CODE_SUCCESS){ 2802 hci_iso_stream_requested_confirm(); 2803 } else { 2804 hci_iso_stream_requested_finalize(); 2805 } 2806 break; 2807 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 2808 default: 2809 break; 2810 } 2811 } 2812 2813 #ifdef ENABLE_BLE 2814 static void event_handle_le_connection_complete(const uint8_t * packet){ 2815 bd_addr_t addr; 2816 bd_addr_type_t addr_type; 2817 hci_connection_t * conn; 2818 2819 // Connection management 2820 reverse_bd_addr(&packet[8], addr); 2821 addr_type = (bd_addr_type_t)packet[7]; 2822 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2823 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2824 2825 #ifdef ENABLE_LE_CENTRAL 2826 // handle error: error is reported only to the initiator -> outgoing connection 2827 if (packet[3]){ 2828 2829 // handle cancelled outgoing connection 2830 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2831 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2832 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2833 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2834 // reset state 2835 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2836 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2837 // get outgoing connection conn struct for direct connect 2838 conn = gap_get_outgoing_connection(); 2839 } 2840 2841 // outgoing le connection establishment is done 2842 if (conn){ 2843 // remove entry 2844 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2845 btstack_memory_hci_connection_free( conn ); 2846 } 2847 return; 2848 } 2849 #endif 2850 2851 // on success, both hosts receive connection complete event 2852 if (packet[6] == HCI_ROLE_MASTER){ 2853 #ifdef ENABLE_LE_CENTRAL 2854 // if we're master on an le connection, it was an outgoing connection and we're done with it 2855 // note: no hci_connection_t object exists yet for connect with whitelist 2856 if (hci_is_le_connection_type(addr_type)){ 2857 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2858 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2859 } 2860 #endif 2861 } else { 2862 #ifdef ENABLE_LE_PERIPHERAL 2863 // if we're slave, it was an incoming connection, advertisements have stopped 2864 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2865 #endif 2866 } 2867 2868 // LE connections are auto-accepted, so just create a connection if there isn't one already 2869 if (!conn){ 2870 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2871 } 2872 2873 // no memory, sorry. 2874 if (!conn){ 2875 return; 2876 } 2877 2878 conn->state = OPEN; 2879 conn->role = packet[6]; 2880 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2881 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2882 2883 #ifdef ENABLE_LE_PERIPHERAL 2884 if (packet[6] == HCI_ROLE_SLAVE){ 2885 hci_update_advertisements_enabled_for_current_roles(); 2886 } 2887 #endif 2888 2889 // init unenhanced att bearer mtu 2890 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2891 conn->att_connection.mtu_exchanged = false; 2892 2893 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2894 2895 // restart timer 2896 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2897 // btstack_run_loop_add_timer(&conn->timeout); 2898 2899 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2900 2901 hci_emit_nr_connections_changed(); 2902 } 2903 #endif 2904 2905 #ifdef ENABLE_CLASSIC 2906 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){ 2907 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2908 // LEVEL_4 is tested by l2cap 2909 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2910 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2911 if (level >= LEVEL_3){ 2912 // MITM not possible without keyboard or display 2913 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2914 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2915 2916 // MITM possible if one side has keyboard and the other has keyboard or display 2917 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2918 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2919 2920 // MITM not possible if one side has only display and other side has no keyboard 2921 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2922 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2923 } 2924 // LEVEL 2 requires SSP, which is a given 2925 return true; 2926 } 2927 2928 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2929 uint16_t i; 2930 for (i=0; i < size ; i++){ 2931 if (data[i] != 0) { 2932 return false; 2933 } 2934 } 2935 return true; 2936 } 2937 2938 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2939 // get requested security level 2940 gap_security_level_t requested_security_level = conn->requested_security_level; 2941 if (hci_stack->gap_secure_connections_only_mode){ 2942 requested_security_level = LEVEL_4; 2943 } 2944 2945 // assess security: LEVEL 4 requires SC 2946 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2947 if ((requested_security_level == LEVEL_4) && 2948 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2949 !hci_remote_sc_enabled(conn)){ 2950 log_info("Level 4 required, but SC not supported -> abort"); 2951 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2952 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2953 return; 2954 } 2955 2956 // assess security based on io capabilities 2957 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2958 // responder: fully validate io caps of both sides as well as OOB data 2959 bool security_possible = false; 2960 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2961 2962 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2963 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2964 // so we merge the OOB data availability 2965 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2966 if (conn->classic_oob_c_192 != NULL){ 2967 have_oob_data |= 1; 2968 } 2969 if (conn->classic_oob_c_256 != NULL){ 2970 have_oob_data |= 2; 2971 } 2972 // for up to Level 3, either P-192 as well as P-256 will do 2973 // 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 2974 // if remote does not SC, we should not receive P-256 data either 2975 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2976 security_possible = true; 2977 } 2978 // for Level 4, P-256 is needed 2979 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2980 security_possible = true; 2981 } 2982 #endif 2983 2984 if (security_possible == false){ 2985 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2986 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2987 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2988 return; 2989 } 2990 } else { 2991 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2992 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2993 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2994 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2995 log_info("Level 3+ required, but no input/output -> abort"); 2996 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2997 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2998 return; 2999 } 3000 #endif 3001 #endif 3002 } 3003 3004 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3005 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 3006 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 3007 } else { 3008 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3009 } 3010 #endif 3011 } 3012 3013 #endif 3014 3015 static void event_handler(uint8_t *packet, uint16_t size){ 3016 3017 uint16_t event_length = packet[1]; 3018 3019 // assert packet is complete 3020 if (size != (event_length + 2u)){ 3021 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 3022 return; 3023 } 3024 3025 bd_addr_type_t addr_type; 3026 hci_con_handle_t handle; 3027 hci_connection_t * conn; 3028 int i; 3029 3030 #ifdef ENABLE_CLASSIC 3031 hci_link_type_t link_type; 3032 bd_addr_t addr; 3033 #endif 3034 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3035 hci_iso_stream_t * iso_stream; 3036 #endif 3037 3038 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 3039 3040 switch (hci_event_packet_get_type(packet)) { 3041 3042 case HCI_EVENT_COMMAND_COMPLETE: 3043 handle_command_complete_event(packet, size); 3044 break; 3045 3046 case HCI_EVENT_COMMAND_STATUS: 3047 handle_command_status_event(packet, size); 3048 break; 3049 3050 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3051 if (size < 3) return; 3052 uint16_t num_handles = packet[2]; 3053 if (size != (3u + num_handles * 4u)) return; 3054 uint16_t offset = 3; 3055 for (i=0; i<num_handles;i++){ 3056 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3057 offset += 2u; 3058 uint16_t num_packets = little_endian_read_16(packet, offset); 3059 offset += 2u; 3060 3061 conn = hci_connection_for_handle(handle); 3062 if (!conn){ 3063 log_error("hci_number_completed_packet lists unused con handle %u", handle); 3064 continue; 3065 } 3066 3067 if (conn->num_packets_sent >= num_packets){ 3068 conn->num_packets_sent -= num_packets; 3069 } else { 3070 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3071 conn->num_packets_sent = 0; 3072 } 3073 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3074 3075 #ifdef ENABLE_CLASSIC 3076 // For SCO, we do the can_send_now_check here 3077 hci_notify_if_sco_can_send_now(); 3078 #endif 3079 } 3080 break; 3081 } 3082 3083 #ifdef ENABLE_CLASSIC 3084 case HCI_EVENT_FLUSH_OCCURRED: 3085 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3086 handle = hci_event_flush_occurred_get_handle(packet); 3087 conn = hci_connection_for_handle(handle); 3088 if (conn) { 3089 log_info("Flush occurred, disconnect 0x%04x", handle); 3090 conn->state = SEND_DISCONNECT; 3091 } 3092 break; 3093 3094 case HCI_EVENT_INQUIRY_COMPLETE: 3095 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3096 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3097 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3098 hci_emit_event(event, sizeof(event), 1); 3099 } 3100 break; 3101 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3102 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3103 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3104 } 3105 break; 3106 case HCI_EVENT_CONNECTION_REQUEST: 3107 reverse_bd_addr(&packet[2], addr); 3108 link_type = (hci_link_type_t) packet[11]; 3109 3110 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3111 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3112 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3113 bd_addr_copy(hci_stack->decline_addr, addr); 3114 break; 3115 } 3116 3117 if (hci_stack->gap_classic_accept_callback != NULL){ 3118 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3119 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3120 bd_addr_copy(hci_stack->decline_addr, addr); 3121 break; 3122 } 3123 } 3124 3125 // TODO: eval COD 8-10 3126 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3127 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3128 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3129 if (!conn) { 3130 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3131 } 3132 if (!conn) { 3133 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3134 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3135 bd_addr_copy(hci_stack->decline_addr, addr); 3136 hci_run(); 3137 // avoid event to higher layer 3138 return; 3139 } 3140 conn->role = HCI_ROLE_SLAVE; 3141 conn->state = RECEIVED_CONNECTION_REQUEST; 3142 // store info about eSCO 3143 if (link_type == HCI_LINK_TYPE_ESCO){ 3144 conn->remote_supported_features[0] |= 1; 3145 } 3146 hci_run(); 3147 break; 3148 3149 case HCI_EVENT_CONNECTION_COMPLETE: 3150 // Connection management 3151 reverse_bd_addr(&packet[5], addr); 3152 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3153 addr_type = BD_ADDR_TYPE_ACL; 3154 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3155 if (conn) { 3156 if (!packet[2]){ 3157 conn->state = OPEN; 3158 conn->con_handle = little_endian_read_16(packet, 3); 3159 3160 // trigger write supervision timeout if we're master 3161 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3162 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3163 } 3164 3165 // trigger write automatic flush timeout 3166 if (hci_stack->automatic_flush_timeout != 0){ 3167 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3168 } 3169 3170 // restart timer 3171 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3172 btstack_run_loop_add_timer(&conn->timeout); 3173 3174 // trigger remote features for dedicated bonding 3175 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3176 hci_trigger_remote_features_for_connection(conn); 3177 } 3178 3179 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3180 3181 hci_emit_nr_connections_changed(); 3182 } else { 3183 // connection failed 3184 hci_handle_connection_failed(conn, packet[2]); 3185 } 3186 } 3187 break; 3188 3189 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3190 reverse_bd_addr(&packet[5], addr); 3191 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3192 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3193 if (packet[2]){ 3194 // connection failed 3195 if (conn){ 3196 hci_handle_connection_failed(conn, packet[2]); 3197 } 3198 break; 3199 } 3200 if (!conn) { 3201 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3202 } 3203 if (!conn) { 3204 break; 3205 } 3206 conn->state = OPEN; 3207 conn->con_handle = little_endian_read_16(packet, 3); 3208 3209 #ifdef ENABLE_SCO_OVER_HCI 3210 // update SCO 3211 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3212 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3213 } 3214 // trigger can send now 3215 if (hci_have_usb_transport()){ 3216 hci_stack->sco_can_send_now = true; 3217 } 3218 #endif 3219 #ifdef HAVE_SCO_TRANSPORT 3220 // configure sco transport 3221 if (hci_stack->sco_transport != NULL){ 3222 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3223 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3224 } 3225 #endif 3226 break; 3227 3228 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3229 handle = little_endian_read_16(packet, 3); 3230 conn = hci_connection_for_handle(handle); 3231 if (!conn) break; 3232 if (!packet[2]){ 3233 const uint8_t * features = &packet[5]; 3234 hci_handle_remote_features_page_0(conn, features); 3235 3236 // read extended features if possible 3237 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3238 && ((conn->remote_supported_features[0] & 2) != 0)) { 3239 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3240 break; 3241 } 3242 } 3243 hci_handle_remote_features_received(conn); 3244 break; 3245 3246 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3247 handle = little_endian_read_16(packet, 3); 3248 conn = hci_connection_for_handle(handle); 3249 if (!conn) break; 3250 // status = ok, page = 1 3251 if (!packet[2]) { 3252 uint8_t page_number = packet[5]; 3253 uint8_t maximum_page_number = packet[6]; 3254 const uint8_t * features = &packet[7]; 3255 bool done = false; 3256 switch (page_number){ 3257 case 1: 3258 hci_handle_remote_features_page_1(conn, features); 3259 if (maximum_page_number >= 2){ 3260 // get Secure Connections (Controller) from Page 2 if available 3261 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3262 } else { 3263 // otherwise, assume SC (Controller) == SC (Host) 3264 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3265 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3266 } 3267 done = true; 3268 } 3269 break; 3270 case 2: 3271 hci_handle_remote_features_page_2(conn, features); 3272 done = true; 3273 break; 3274 default: 3275 break; 3276 } 3277 if (!done) break; 3278 } 3279 hci_handle_remote_features_received(conn); 3280 break; 3281 3282 case HCI_EVENT_LINK_KEY_REQUEST: 3283 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3284 hci_event_link_key_request_get_bd_addr(packet, addr); 3285 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3286 if (!conn) break; 3287 3288 // lookup link key in db if not cached 3289 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3290 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3291 } 3292 3293 // response sent by hci_run() 3294 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3295 #endif 3296 break; 3297 3298 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3299 hci_event_link_key_request_get_bd_addr(packet, addr); 3300 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3301 if (!conn) break; 3302 3303 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3304 3305 // CVE-2020-26555: ignore NULL link key 3306 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3307 if (btstack_is_null(&packet[8], 16)) break; 3308 3309 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3310 // Change Connection Encryption keeps link key type 3311 if (link_key_type != CHANGED_COMBINATION_KEY){ 3312 conn->link_key_type = link_key_type; 3313 } 3314 3315 // cache link key. link keys stored in little-endian format for legacy reasons 3316 memcpy(&conn->link_key, &packet[8], 16); 3317 3318 // only store link key: 3319 // - if bondable enabled 3320 if (hci_stack->bondable == false) break; 3321 // - if security level sufficient 3322 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3323 // - for SSP, also check if remote side requested bonding as well 3324 if (conn->link_key_type != COMBINATION_KEY){ 3325 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3326 if (!remote_bonding){ 3327 break; 3328 } 3329 } 3330 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3331 break; 3332 } 3333 3334 case HCI_EVENT_PIN_CODE_REQUEST: 3335 hci_event_pin_code_request_get_bd_addr(packet, addr); 3336 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3337 if (!conn) break; 3338 3339 hci_pairing_started(conn, false); 3340 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3341 if (!hci_stack->bondable ){ 3342 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3343 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3344 hci_run(); 3345 return; 3346 } 3347 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3348 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3349 log_info("Level 4 required, but SC not supported -> abort"); 3350 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3351 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3352 hci_run(); 3353 return; 3354 } 3355 break; 3356 3357 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3358 hci_event_io_capability_response_get_bd_addr(packet, addr); 3359 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3360 if (!conn) break; 3361 3362 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3363 hci_pairing_started(conn, true); 3364 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3365 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3366 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3367 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3368 #endif 3369 break; 3370 3371 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3372 hci_event_io_capability_response_get_bd_addr(packet, addr); 3373 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3374 if (!conn) break; 3375 3376 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3377 hci_connection_timestamp(conn); 3378 hci_pairing_started(conn, true); 3379 break; 3380 3381 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3382 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3383 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3384 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3385 if (!conn) break; 3386 3387 hci_connection_timestamp(conn); 3388 3389 hci_pairing_started(conn, true); 3390 3391 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3392 break; 3393 #endif 3394 3395 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3396 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3397 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3398 if (!conn) break; 3399 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3400 if (hci_stack->ssp_auto_accept){ 3401 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3402 }; 3403 } else { 3404 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3405 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3406 // don't forward event to app 3407 hci_run(); 3408 return; 3409 } 3410 break; 3411 3412 case HCI_EVENT_USER_PASSKEY_REQUEST: 3413 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3414 if (hci_stack->ssp_auto_accept){ 3415 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3416 }; 3417 break; 3418 3419 case HCI_EVENT_MODE_CHANGE: 3420 handle = hci_event_mode_change_get_handle(packet); 3421 conn = hci_connection_for_handle(handle); 3422 if (!conn) break; 3423 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3424 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3425 break; 3426 #endif 3427 3428 case HCI_EVENT_ENCRYPTION_CHANGE: 3429 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3430 handle = hci_event_encryption_change_get_connection_handle(packet); 3431 conn = hci_connection_for_handle(handle); 3432 if (!conn) break; 3433 if (hci_event_encryption_change_get_status(packet) == 0u) { 3434 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3435 if (encryption_enabled){ 3436 if (hci_is_le_connection(conn)){ 3437 // For LE, we accept connection as encrypted 3438 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3439 } 3440 #ifdef ENABLE_CLASSIC 3441 else { 3442 3443 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3444 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3445 bool connected_uses_aes_ccm = encryption_enabled == 2; 3446 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3447 log_info("SC during pairing, but only E0 now -> abort"); 3448 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3449 break; 3450 } 3451 3452 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3453 if (connected_uses_aes_ccm){ 3454 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3455 } 3456 3457 #ifdef ENABLE_TESTING_SUPPORT 3458 // work around for issue with PTS dongle 3459 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3460 #endif 3461 // validate encryption key size 3462 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3463 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3464 // already got encryption key size 3465 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3466 } else { 3467 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3468 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3469 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3470 } else { 3471 // if not, pretend everything is perfect 3472 hci_handle_read_encryption_key_size_complete(conn, 16); 3473 } 3474 } 3475 } 3476 #endif 3477 } else { 3478 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3479 } 3480 } else { 3481 uint8_t status = hci_event_encryption_change_get_status(packet); 3482 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3483 conn->bonding_flags &= ~BONDING_DEDICATED; 3484 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3485 conn->bonding_status = status; 3486 } 3487 } 3488 3489 break; 3490 3491 #ifdef ENABLE_CLASSIC 3492 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3493 handle = hci_event_authentication_complete_get_connection_handle(packet); 3494 conn = hci_connection_for_handle(handle); 3495 if (!conn) break; 3496 3497 // clear authentication active flag 3498 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3499 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3500 3501 // authenticated only if auth status == 0 3502 if (hci_event_authentication_complete_get_status(packet) == 0){ 3503 // authenticated 3504 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3505 3506 // If not already encrypted, start encryption 3507 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3508 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3509 break; 3510 } 3511 } 3512 3513 // emit updated security level 3514 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3515 break; 3516 3517 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3518 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3519 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3520 if (!conn) break; 3521 3522 // treat successfully paired connection as authenticated 3523 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3524 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3525 } 3526 3527 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3528 break; 3529 #endif 3530 3531 // HCI_EVENT_DISCONNECTION_COMPLETE 3532 // has been split, to first notify stack before shutting connection down 3533 // see end of function, too. 3534 case HCI_EVENT_DISCONNECTION_COMPLETE: 3535 if (packet[2]) break; // status != 0 3536 handle = little_endian_read_16(packet, 3); 3537 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3538 if (hci_stack->acl_fragmentation_total_size > 0u) { 3539 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3540 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3541 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3542 hci_stack->acl_fragmentation_total_size = 0; 3543 hci_stack->acl_fragmentation_pos = 0; 3544 if (release_buffer){ 3545 hci_release_packet_buffer(); 3546 } 3547 } 3548 } 3549 3550 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3551 // drop outgoing ISO fragments if it is for closed connection and release buffer if tx not active 3552 if (hci_stack->iso_fragmentation_total_size > 0u) { 3553 if (handle == READ_ISO_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3554 int release_buffer = hci_stack->iso_fragmentation_tx_active == 0u; 3555 log_info("drop fragmented ISO data for closed connection, release buffer %u", release_buffer); 3556 hci_stack->iso_fragmentation_total_size = 0; 3557 hci_stack->iso_fragmentation_pos = 0; 3558 if (release_buffer){ 3559 hci_release_packet_buffer(); 3560 } 3561 } 3562 } 3563 3564 // finalize iso stream if handle matches 3565 iso_stream = hci_iso_stream_for_cis_handle(handle); 3566 if (iso_stream != NULL){ 3567 hci_iso_stream_finalize(iso_stream); 3568 break; 3569 } 3570 #endif 3571 3572 conn = hci_connection_for_handle(handle); 3573 if (!conn) break; 3574 #ifdef ENABLE_CLASSIC 3575 // pairing failed if it was ongoing 3576 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3577 #endif 3578 3579 // emit dedicatd bonding event 3580 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3581 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3582 } 3583 3584 // mark connection for shutdown, stop timers, reset state 3585 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3586 hci_connection_stop_timer(conn); 3587 hci_connection_init(conn); 3588 3589 #ifdef ENABLE_BLE 3590 #ifdef ENABLE_LE_PERIPHERAL 3591 // re-enable advertisements for le connections if active 3592 if (hci_is_le_connection(conn)){ 3593 hci_update_advertisements_enabled_for_current_roles(); 3594 } 3595 #endif 3596 #endif 3597 break; 3598 3599 case HCI_EVENT_HARDWARE_ERROR: 3600 log_error("Hardware Error: 0x%02x", packet[2]); 3601 if (hci_stack->hardware_error_callback){ 3602 (*hci_stack->hardware_error_callback)(packet[2]); 3603 } else { 3604 // if no special requests, just reboot stack 3605 hci_power_control_off(); 3606 hci_power_control_on(); 3607 } 3608 break; 3609 3610 #ifdef ENABLE_CLASSIC 3611 case HCI_EVENT_ROLE_CHANGE: 3612 if (packet[2]) break; // status != 0 3613 reverse_bd_addr(&packet[3], addr); 3614 addr_type = BD_ADDR_TYPE_ACL; 3615 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3616 if (!conn) break; 3617 conn->role = packet[9]; 3618 break; 3619 #endif 3620 3621 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3622 // release packet buffer only for asynchronous transport and if there are not further fragments 3623 if (hci_transport_synchronous()) { 3624 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3625 return; // instead of break: to avoid re-entering hci_run() 3626 } 3627 hci_stack->acl_fragmentation_tx_active = 0; 3628 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3629 hci_stack->iso_fragmentation_tx_active = 0; 3630 if (hci_stack->iso_fragmentation_total_size) break; 3631 #endif 3632 if (hci_stack->acl_fragmentation_total_size) break; 3633 hci_release_packet_buffer(); 3634 3635 // L2CAP receives this event via the hci_emit_event below 3636 3637 #ifdef ENABLE_CLASSIC 3638 // For SCO, we do the can_send_now_check here 3639 hci_notify_if_sco_can_send_now(); 3640 #endif 3641 break; 3642 3643 #ifdef ENABLE_CLASSIC 3644 case HCI_EVENT_SCO_CAN_SEND_NOW: 3645 // For SCO, we do the can_send_now_check here 3646 hci_stack->sco_can_send_now = true; 3647 hci_notify_if_sco_can_send_now(); 3648 return; 3649 3650 // explode inquriy results for easier consumption 3651 case HCI_EVENT_INQUIRY_RESULT: 3652 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3653 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3654 gap_inquiry_explode(packet, size); 3655 break; 3656 #endif 3657 3658 #ifdef ENABLE_BLE 3659 case HCI_EVENT_LE_META: 3660 switch (packet[2]){ 3661 #ifdef ENABLE_LE_CENTRAL 3662 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3663 if (!hci_stack->le_scanning_enabled) break; 3664 le_handle_advertisement_report(packet, size); 3665 break; 3666 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3667 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3668 if (!hci_stack->le_scanning_enabled) break; 3669 le_handle_extended_advertisement_report(packet, size); 3670 break; 3671 #endif 3672 #endif 3673 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3674 event_handle_le_connection_complete(packet); 3675 break; 3676 3677 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3678 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3679 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3680 conn = hci_connection_for_handle(handle); 3681 if (!conn) break; 3682 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3683 break; 3684 3685 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3686 // connection 3687 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3688 conn = hci_connection_for_handle(handle); 3689 if (conn) { 3690 // read arguments 3691 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3692 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3693 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3694 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3695 3696 // validate against current connection parameter range 3697 le_connection_parameter_range_t existing_range; 3698 gap_get_connection_parameter_range(&existing_range); 3699 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3700 if (update_parameter){ 3701 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3702 conn->le_conn_interval_min = le_conn_interval_min; 3703 conn->le_conn_interval_max = le_conn_interval_max; 3704 conn->le_conn_latency = le_conn_latency; 3705 conn->le_supervision_timeout = le_supervision_timeout; 3706 } else { 3707 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3708 } 3709 } 3710 break; 3711 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3712 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3713 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3714 conn = hci_connection_for_handle(handle); 3715 if (conn) { 3716 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3717 } 3718 break; 3719 #endif 3720 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3721 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 3722 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 3723 iso_stream = hci_iso_stream_for_cis_handle(handle); 3724 if (iso_stream){ 3725 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 3726 if (status == ERROR_CODE_SUCCESS){ 3727 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3728 } else { 3729 hci_iso_stream_finalize(iso_stream); 3730 } 3731 } 3732 #endif 3733 default: 3734 break; 3735 } 3736 break; 3737 #endif 3738 case HCI_EVENT_VENDOR_SPECIFIC: 3739 // Vendor specific commands often create vendor specific event instead of num completed packets 3740 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3741 switch (hci_stack->manufacturer){ 3742 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3743 hci_stack->num_cmd_packets = 1; 3744 break; 3745 default: 3746 break; 3747 } 3748 break; 3749 default: 3750 break; 3751 } 3752 3753 handle_event_for_current_stack_state(packet, size); 3754 3755 // notify upper stack 3756 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3757 3758 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3759 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3760 handle = little_endian_read_16(packet, 3); 3761 hci_connection_t * aConn = hci_connection_for_handle(handle); 3762 // discard connection if app did not trigger a reconnect in the event handler 3763 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3764 hci_shutdown_connection(aConn); 3765 } 3766 } 3767 3768 // execute main loop 3769 hci_run(); 3770 } 3771 3772 #ifdef ENABLE_CLASSIC 3773 3774 #ifdef ENABLE_SCO_OVER_HCI 3775 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3776 static void sco_schedule_tx(hci_connection_t * conn); 3777 3778 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3779 log_debug("SCO TX Timeout"); 3780 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3781 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3782 if (!conn) return; 3783 3784 // trigger send 3785 conn->sco_tx_ready = 1; 3786 // extra packet if CVSD but SCO buffer is too short 3787 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3788 conn->sco_tx_ready++; 3789 } 3790 hci_notify_if_sco_can_send_now(); 3791 } 3792 3793 3794 #define SCO_TX_AFTER_RX_MS (6) 3795 3796 static void sco_schedule_tx(hci_connection_t * conn){ 3797 3798 uint32_t now = btstack_run_loop_get_time_ms(); 3799 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3800 int time_delta_ms = sco_tx_ms - now; 3801 3802 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3803 3804 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3805 btstack_run_loop_remove_timer(timer); 3806 btstack_run_loop_set_timer(timer, time_delta_ms); 3807 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3808 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3809 btstack_run_loop_add_timer(timer); 3810 } 3811 #endif 3812 3813 static void sco_handler(uint8_t * packet, uint16_t size){ 3814 // lookup connection struct 3815 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3816 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3817 if (!conn) return; 3818 3819 #ifdef ENABLE_SCO_OVER_HCI 3820 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3821 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3822 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3823 packet[2] = 0x3c; 3824 memmove(&packet[3], &packet[23], 63); 3825 size = 63; 3826 } 3827 } 3828 3829 if (hci_have_usb_transport()){ 3830 // Nothing to do 3831 } else { 3832 // 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); 3833 if (hci_stack->synchronous_flow_control_enabled == 0){ 3834 uint32_t now = btstack_run_loop_get_time_ms(); 3835 3836 if (!conn->sco_rx_valid){ 3837 // ignore first 10 packets 3838 conn->sco_rx_count++; 3839 // log_debug("sco rx count %u", conn->sco_rx_count); 3840 if (conn->sco_rx_count == 10) { 3841 // use first timestamp as is and pretent it just started 3842 conn->sco_rx_ms = now; 3843 conn->sco_rx_valid = 1; 3844 conn->sco_rx_count = 0; 3845 sco_schedule_tx(conn); 3846 } 3847 } else { 3848 // track expected arrival timme 3849 conn->sco_rx_count++; 3850 conn->sco_rx_ms += 7; 3851 int delta = (int32_t) (now - conn->sco_rx_ms); 3852 if (delta > 0){ 3853 conn->sco_rx_ms++; 3854 } 3855 // log_debug("sco rx %u", conn->sco_rx_ms); 3856 sco_schedule_tx(conn); 3857 } 3858 } 3859 } 3860 #endif 3861 3862 // deliver to app 3863 if (hci_stack->sco_packet_handler) { 3864 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3865 } 3866 3867 #ifdef HAVE_SCO_TRANSPORT 3868 // We can send one packet for each received packet 3869 conn->sco_tx_ready++; 3870 hci_notify_if_sco_can_send_now(); 3871 #endif 3872 3873 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3874 conn->num_packets_completed++; 3875 hci_stack->host_completed_packets = 1; 3876 hci_run(); 3877 #endif 3878 } 3879 #endif 3880 3881 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3882 hci_dump_packet(packet_type, 1, packet, size); 3883 switch (packet_type) { 3884 case HCI_EVENT_PACKET: 3885 event_handler(packet, size); 3886 break; 3887 case HCI_ACL_DATA_PACKET: 3888 acl_handler(packet, size); 3889 break; 3890 #ifdef ENABLE_CLASSIC 3891 case HCI_SCO_DATA_PACKET: 3892 sco_handler(packet, size); 3893 break; 3894 #endif 3895 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3896 case HCI_ISO_DATA_PACKET: 3897 hci_iso_packet_handler(packet, size); 3898 break; 3899 #endif 3900 default: 3901 break; 3902 } 3903 } 3904 3905 /** 3906 * @brief Add event packet handler. 3907 */ 3908 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3909 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3910 } 3911 3912 /** 3913 * @brief Remove event packet handler. 3914 */ 3915 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3916 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3917 } 3918 3919 /** Register HCI packet handlers */ 3920 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3921 hci_stack->acl_packet_handler = handler; 3922 } 3923 3924 #ifdef ENABLE_CLASSIC 3925 /** 3926 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3927 */ 3928 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3929 hci_stack->sco_packet_handler = handler; 3930 } 3931 #endif 3932 3933 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3934 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 3935 hci_stack->iso_packet_handler = handler; 3936 } 3937 #endif 3938 3939 static void hci_state_reset(void){ 3940 // no connections yet 3941 hci_stack->connections = NULL; 3942 3943 // keep discoverable/connectable as this has been requested by the client(s) 3944 // hci_stack->discoverable = 0; 3945 // hci_stack->connectable = 0; 3946 // hci_stack->bondable = 1; 3947 // hci_stack->own_addr_type = 0; 3948 3949 // buffer is free 3950 hci_stack->hci_packet_buffer_reserved = false; 3951 3952 // no pending cmds 3953 hci_stack->decline_reason = 0; 3954 3955 hci_stack->secure_connections_active = false; 3956 3957 #ifdef ENABLE_CLASSIC 3958 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3959 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3960 3961 hci_stack->gap_tasks_classic = 3962 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3963 GAP_TASK_SET_CLASS_OF_DEVICE | 3964 GAP_TASK_SET_LOCAL_NAME | 3965 GAP_TASK_SET_EIR_DATA | 3966 GAP_TASK_WRITE_SCAN_ENABLE | 3967 GAP_TASK_WRITE_PAGE_TIMEOUT; 3968 #endif 3969 3970 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3971 hci_stack->classic_read_local_oob_data = false; 3972 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3973 #endif 3974 3975 // LE 3976 #ifdef ENABLE_BLE 3977 memset(hci_stack->le_random_address, 0, 6); 3978 hci_stack->le_random_address_set = 0; 3979 #endif 3980 #ifdef ENABLE_LE_CENTRAL 3981 hci_stack->le_scanning_active = false; 3982 hci_stack->le_scanning_param_update = true; 3983 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3984 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3985 hci_stack->le_whitelist_capacity = 0; 3986 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3987 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 3988 #endif 3989 #endif 3990 #ifdef ENABLE_LE_PERIPHERAL 3991 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3992 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3993 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3994 } 3995 if (hci_stack->le_advertisements_data != NULL){ 3996 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3997 } 3998 #endif 3999 } 4000 4001 #ifdef ENABLE_CLASSIC 4002 /** 4003 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4004 */ 4005 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4006 // store and open remote device db 4007 hci_stack->link_key_db = link_key_db; 4008 if (hci_stack->link_key_db) { 4009 hci_stack->link_key_db->open(); 4010 } 4011 } 4012 #endif 4013 4014 void hci_init(const hci_transport_t *transport, const void *config){ 4015 4016 #ifdef HAVE_MALLOC 4017 if (!hci_stack) { 4018 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4019 } 4020 #else 4021 hci_stack = &hci_stack_static; 4022 #endif 4023 memset(hci_stack, 0, sizeof(hci_stack_t)); 4024 4025 // reference to use transport layer implementation 4026 hci_stack->hci_transport = transport; 4027 4028 // reference to used config 4029 hci_stack->config = config; 4030 4031 // setup pointer for outgoing packet buffer 4032 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4033 4034 // max acl payload size defined in config.h 4035 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4036 4037 // register packet handlers with transport 4038 transport->register_packet_handler(&packet_handler); 4039 4040 hci_stack->state = HCI_STATE_OFF; 4041 4042 // class of device 4043 hci_stack->class_of_device = 0x007a020c; // Smartphone 4044 4045 // bondable by default 4046 hci_stack->bondable = 1; 4047 4048 #ifdef ENABLE_CLASSIC 4049 // classic name 4050 hci_stack->local_name = default_classic_name; 4051 4052 // Master slave policy 4053 hci_stack->master_slave_policy = 1; 4054 4055 // Allow Role Switch 4056 hci_stack->allow_role_switch = 1; 4057 4058 // Default / minimum security level = 2 4059 hci_stack->gap_security_level = LEVEL_2; 4060 4061 // Default Security Mode 4 4062 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4063 4064 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4065 hci_stack->gap_required_encyrption_key_size = 7; 4066 4067 // Link Supervision Timeout 4068 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4069 4070 #endif 4071 4072 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4073 hci_stack->ssp_enable = 1; 4074 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4075 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4076 hci_stack->ssp_auto_accept = 1; 4077 4078 // Secure Connections: enable (requires support from Controller) 4079 hci_stack->secure_connections_enable = true; 4080 4081 // voice setting - signed 16 bit pcm data with CVSD over the air 4082 hci_stack->sco_voice_setting = 0x60; 4083 4084 #ifdef ENABLE_LE_CENTRAL 4085 // connection parameter to use for outgoing connections 4086 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4087 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4088 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4089 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4090 hci_stack->le_connection_latency = 4; // 4 4091 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4092 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4093 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4094 4095 // default LE Scanning 4096 hci_stack->le_scan_type = 0x1; // active 4097 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4098 hci_stack->le_scan_window = 0x30; // 30 ms 4099 #endif 4100 4101 #ifdef ENABLE_LE_PERIPHERAL 4102 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4103 #endif 4104 4105 // connection parameter range used to answer connection parameter update requests in l2cap 4106 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4107 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4108 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4109 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4110 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4111 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4112 4113 hci_state_reset(); 4114 } 4115 4116 void hci_deinit(void){ 4117 btstack_run_loop_remove_timer(&hci_stack->timeout); 4118 #ifdef HAVE_MALLOC 4119 if (hci_stack) { 4120 free(hci_stack); 4121 } 4122 #endif 4123 hci_stack = NULL; 4124 4125 #ifdef ENABLE_CLASSIC 4126 disable_l2cap_timeouts = 0; 4127 #endif 4128 } 4129 4130 /** 4131 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4132 */ 4133 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4134 hci_stack->chipset = chipset_driver; 4135 4136 // reset chipset driver - init is also called on power_up 4137 if (hci_stack->chipset && hci_stack->chipset->init){ 4138 hci_stack->chipset->init(hci_stack->config); 4139 } 4140 } 4141 4142 /** 4143 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4144 */ 4145 void hci_set_control(const btstack_control_t *hardware_control){ 4146 // references to used control implementation 4147 hci_stack->control = hardware_control; 4148 // init with transport config 4149 hardware_control->init(hci_stack->config); 4150 } 4151 4152 static void hci_discard_connections(void){ 4153 btstack_linked_list_iterator_t lit; 4154 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 4155 while (btstack_linked_list_iterator_has_next(&lit)){ 4156 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4157 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 4158 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4159 hci_shutdown_connection(connection); 4160 } 4161 } 4162 4163 void hci_close(void){ 4164 4165 #ifdef ENABLE_CLASSIC 4166 // close remote device db 4167 if (hci_stack->link_key_db) { 4168 hci_stack->link_key_db->close(); 4169 } 4170 #endif 4171 4172 hci_discard_connections(); 4173 4174 hci_power_control(HCI_POWER_OFF); 4175 4176 #ifdef HAVE_MALLOC 4177 free(hci_stack); 4178 #endif 4179 hci_stack = NULL; 4180 } 4181 4182 #ifdef HAVE_SCO_TRANSPORT 4183 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4184 hci_stack->sco_transport = sco_transport; 4185 sco_transport->register_packet_handler(&packet_handler); 4186 } 4187 #endif 4188 4189 #ifdef ENABLE_CLASSIC 4190 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4191 // validate ranage and set 4192 if (encryption_key_size < 7) return; 4193 if (encryption_key_size > 16) return; 4194 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4195 } 4196 4197 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4198 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4199 hci_stack->gap_security_mode = security_mode; 4200 return ERROR_CODE_SUCCESS; 4201 } else { 4202 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4203 } 4204 } 4205 4206 gap_security_mode_t gap_get_security_mode(void){ 4207 return hci_stack->gap_security_mode; 4208 } 4209 4210 void gap_set_security_level(gap_security_level_t security_level){ 4211 hci_stack->gap_security_level = security_level; 4212 } 4213 4214 gap_security_level_t gap_get_security_level(void){ 4215 if (hci_stack->gap_secure_connections_only_mode){ 4216 return LEVEL_4; 4217 } 4218 return hci_stack->gap_security_level; 4219 } 4220 4221 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4222 hci_stack->gap_minimal_service_security_level = security_level; 4223 } 4224 4225 void gap_set_secure_connections_only_mode(bool enable){ 4226 hci_stack->gap_secure_connections_only_mode = enable; 4227 } 4228 4229 bool gap_get_secure_connections_only_mode(void){ 4230 return hci_stack->gap_secure_connections_only_mode; 4231 } 4232 #endif 4233 4234 #ifdef ENABLE_CLASSIC 4235 void gap_set_class_of_device(uint32_t class_of_device){ 4236 hci_stack->class_of_device = class_of_device; 4237 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4238 hci_run(); 4239 } 4240 4241 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4242 hci_stack->default_link_policy_settings = default_link_policy_settings; 4243 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4244 hci_run(); 4245 } 4246 4247 void gap_set_allow_role_switch(bool allow_role_switch){ 4248 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4249 } 4250 4251 uint8_t hci_get_allow_role_switch(void){ 4252 return hci_stack->allow_role_switch; 4253 } 4254 4255 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4256 hci_stack->link_supervision_timeout = link_supervision_timeout; 4257 } 4258 4259 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4260 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4261 } 4262 4263 uint16_t hci_automatic_flush_timeout(void){ 4264 return hci_stack->automatic_flush_timeout; 4265 } 4266 4267 void hci_disable_l2cap_timeout_check(void){ 4268 disable_l2cap_timeouts = 1; 4269 } 4270 #endif 4271 4272 #ifndef HAVE_HOST_CONTROLLER_API 4273 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4274 void hci_set_bd_addr(bd_addr_t addr){ 4275 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4276 hci_stack->custom_bd_addr_set = 1; 4277 } 4278 #endif 4279 4280 // State-Module-Driver overview 4281 // state module low-level 4282 // HCI_STATE_OFF off close 4283 // HCI_STATE_INITIALIZING, on open 4284 // HCI_STATE_WORKING, on open 4285 // HCI_STATE_HALTING, on open 4286 // HCI_STATE_SLEEPING, off/sleep close 4287 // HCI_STATE_FALLING_ASLEEP on open 4288 4289 static int hci_power_control_on(void){ 4290 4291 // power on 4292 int err = 0; 4293 if (hci_stack->control && hci_stack->control->on){ 4294 err = (*hci_stack->control->on)(); 4295 } 4296 if (err){ 4297 log_error( "POWER_ON failed"); 4298 hci_emit_hci_open_failed(); 4299 return err; 4300 } 4301 4302 // int chipset driver 4303 if (hci_stack->chipset && hci_stack->chipset->init){ 4304 hci_stack->chipset->init(hci_stack->config); 4305 } 4306 4307 // init transport 4308 if (hci_stack->hci_transport->init){ 4309 hci_stack->hci_transport->init(hci_stack->config); 4310 } 4311 4312 // open transport 4313 err = hci_stack->hci_transport->open(); 4314 if (err){ 4315 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4316 if (hci_stack->control && hci_stack->control->off){ 4317 (*hci_stack->control->off)(); 4318 } 4319 hci_emit_hci_open_failed(); 4320 return err; 4321 } 4322 return 0; 4323 } 4324 4325 static void hci_power_control_off(void){ 4326 4327 log_info("hci_power_control_off"); 4328 4329 // close low-level device 4330 hci_stack->hci_transport->close(); 4331 4332 log_info("hci_power_control_off - hci_transport closed"); 4333 4334 // power off 4335 if (hci_stack->control && hci_stack->control->off){ 4336 (*hci_stack->control->off)(); 4337 } 4338 4339 log_info("hci_power_control_off - control closed"); 4340 4341 hci_stack->state = HCI_STATE_OFF; 4342 } 4343 4344 static void hci_power_control_sleep(void){ 4345 4346 log_info("hci_power_control_sleep"); 4347 4348 #if 0 4349 // don't close serial port during sleep 4350 4351 // close low-level device 4352 hci_stack->hci_transport->close(hci_stack->config); 4353 #endif 4354 4355 // sleep mode 4356 if (hci_stack->control && hci_stack->control->sleep){ 4357 (*hci_stack->control->sleep)(); 4358 } 4359 4360 hci_stack->state = HCI_STATE_SLEEPING; 4361 } 4362 4363 static int hci_power_control_wake(void){ 4364 4365 log_info("hci_power_control_wake"); 4366 4367 // wake on 4368 if (hci_stack->control && hci_stack->control->wake){ 4369 (*hci_stack->control->wake)(); 4370 } 4371 4372 #if 0 4373 // open low-level device 4374 int err = hci_stack->hci_transport->open(hci_stack->config); 4375 if (err){ 4376 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4377 if (hci_stack->control && hci_stack->control->off){ 4378 (*hci_stack->control->off)(); 4379 } 4380 hci_emit_hci_open_failed(); 4381 return err; 4382 } 4383 #endif 4384 4385 return 0; 4386 } 4387 4388 static void hci_power_enter_initializing_state(void){ 4389 // set up state machine 4390 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4391 hci_stack->hci_packet_buffer_reserved = false; 4392 hci_stack->state = HCI_STATE_INITIALIZING; 4393 hci_stack->substate = HCI_INIT_SEND_RESET; 4394 } 4395 4396 static void hci_power_enter_halting_state(void){ 4397 #ifdef ENABLE_BLE 4398 hci_whitelist_free(); 4399 #endif 4400 // see hci_run 4401 hci_stack->state = HCI_STATE_HALTING; 4402 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4403 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4404 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4405 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4406 btstack_run_loop_add_timer(&hci_stack->timeout); 4407 } 4408 4409 // returns error 4410 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4411 int err; 4412 switch (power_mode){ 4413 case HCI_POWER_ON: 4414 err = hci_power_control_on(); 4415 if (err != 0) { 4416 log_error("hci_power_control_on() error %d", err); 4417 return err; 4418 } 4419 hci_power_enter_initializing_state(); 4420 break; 4421 case HCI_POWER_OFF: 4422 // do nothing 4423 break; 4424 case HCI_POWER_SLEEP: 4425 // do nothing (with SLEEP == OFF) 4426 break; 4427 default: 4428 btstack_assert(false); 4429 break; 4430 } 4431 return ERROR_CODE_SUCCESS; 4432 } 4433 4434 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4435 switch (power_mode){ 4436 case HCI_POWER_ON: 4437 // do nothing 4438 break; 4439 case HCI_POWER_OFF: 4440 // no connections yet, just turn it off 4441 hci_power_control_off(); 4442 break; 4443 case HCI_POWER_SLEEP: 4444 // no connections yet, just turn it off 4445 hci_power_control_sleep(); 4446 break; 4447 default: 4448 btstack_assert(false); 4449 break; 4450 } 4451 return ERROR_CODE_SUCCESS; 4452 } 4453 4454 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4455 switch (power_mode){ 4456 case HCI_POWER_ON: 4457 // do nothing 4458 break; 4459 case HCI_POWER_OFF: 4460 hci_power_enter_halting_state(); 4461 break; 4462 case HCI_POWER_SLEEP: 4463 // see hci_run 4464 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4465 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4466 break; 4467 default: 4468 btstack_assert(false); 4469 break; 4470 } 4471 return ERROR_CODE_SUCCESS; 4472 } 4473 4474 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4475 switch (power_mode){ 4476 case HCI_POWER_ON: 4477 hci_power_enter_initializing_state(); 4478 break; 4479 case HCI_POWER_OFF: 4480 // do nothing 4481 break; 4482 case HCI_POWER_SLEEP: 4483 // see hci_run 4484 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4485 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4486 break; 4487 default: 4488 btstack_assert(false); 4489 break; 4490 } 4491 return ERROR_CODE_SUCCESS; 4492 } 4493 4494 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4495 switch (power_mode){ 4496 case HCI_POWER_ON: 4497 hci_power_enter_initializing_state(); 4498 break; 4499 case HCI_POWER_OFF: 4500 hci_power_enter_halting_state(); 4501 break; 4502 case HCI_POWER_SLEEP: 4503 // do nothing 4504 break; 4505 default: 4506 btstack_assert(false); 4507 break; 4508 } 4509 return ERROR_CODE_SUCCESS; 4510 } 4511 4512 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4513 int err; 4514 switch (power_mode){ 4515 case HCI_POWER_ON: 4516 err = hci_power_control_wake(); 4517 if (err) return err; 4518 hci_power_enter_initializing_state(); 4519 break; 4520 case HCI_POWER_OFF: 4521 hci_power_enter_halting_state(); 4522 break; 4523 case HCI_POWER_SLEEP: 4524 // do nothing 4525 break; 4526 default: 4527 btstack_assert(false); 4528 break; 4529 } 4530 return ERROR_CODE_SUCCESS; 4531 } 4532 4533 int hci_power_control(HCI_POWER_MODE power_mode){ 4534 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4535 int err = 0; 4536 switch (hci_stack->state){ 4537 case HCI_STATE_OFF: 4538 err = hci_power_control_state_off(power_mode); 4539 break; 4540 case HCI_STATE_INITIALIZING: 4541 err = hci_power_control_state_initializing(power_mode); 4542 break; 4543 case HCI_STATE_WORKING: 4544 err = hci_power_control_state_working(power_mode); 4545 break; 4546 case HCI_STATE_HALTING: 4547 err = hci_power_control_state_halting(power_mode); 4548 break; 4549 case HCI_STATE_FALLING_ASLEEP: 4550 err = hci_power_control_state_falling_asleep(power_mode); 4551 break; 4552 case HCI_STATE_SLEEPING: 4553 err = hci_power_control_state_sleeping(power_mode); 4554 break; 4555 default: 4556 btstack_assert(false); 4557 break; 4558 } 4559 if (err != 0){ 4560 return err; 4561 } 4562 4563 // create internal event 4564 hci_emit_state(); 4565 4566 // trigger next/first action 4567 hci_run(); 4568 4569 return 0; 4570 } 4571 4572 4573 static void hci_halting_run(void) { 4574 4575 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4576 4577 hci_connection_t *connection; 4578 #ifdef ENABLE_BLE 4579 #ifdef ENABLE_LE_PERIPHERAL 4580 bool stop_advertismenets; 4581 #endif 4582 #endif 4583 4584 switch (hci_stack->substate) { 4585 case HCI_HALTING_CLASSIC_STOP: 4586 #ifdef ENABLE_CLASSIC 4587 if (!hci_can_send_command_packet_now()) return; 4588 4589 if (hci_stack->connectable || hci_stack->discoverable){ 4590 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4591 hci_send_cmd(&hci_write_scan_enable, 0); 4592 return; 4593 } 4594 #endif 4595 /* fall through */ 4596 4597 case HCI_HALTING_LE_ADV_STOP: 4598 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4599 4600 #ifdef ENABLE_BLE 4601 #ifdef ENABLE_LE_PERIPHERAL 4602 if (!hci_can_send_command_packet_now()) return; 4603 4604 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4605 4606 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4607 if (hci_extended_advertising_supported()){ 4608 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4609 btstack_linked_list_iterator_t it; 4610 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4611 // stop all periodic advertisements and check if an extended set is active 4612 while (btstack_linked_list_iterator_has_next(&it)){ 4613 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4614 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4615 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4616 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4617 return; 4618 } 4619 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4620 stop_advertismenets = true; 4621 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4622 } 4623 } 4624 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 4625 if (stop_advertismenets){ 4626 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4627 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4628 return; 4629 } 4630 } 4631 else 4632 #else 4633 { 4634 if (stop_advertismenets) { 4635 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4636 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4637 return; 4638 } 4639 } 4640 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4641 #endif /* ENABLE_LE_PERIPHERAL */ 4642 #endif /* ENABLE_BLE */ 4643 4644 /* fall through */ 4645 4646 case HCI_HALTING_LE_SCAN_STOP: 4647 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4648 if (!hci_can_send_command_packet_now()) return; 4649 4650 #ifdef ENABLE_BLE 4651 #ifdef ENABLE_LE_CENTRAL 4652 if (hci_stack->le_scanning_active){ 4653 hci_le_scan_stop(); 4654 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4655 return; 4656 } 4657 #endif 4658 #endif 4659 4660 /* fall through */ 4661 4662 case HCI_HALTING_DISCONNECT_ALL: 4663 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4664 if (!hci_can_send_command_packet_now()) return; 4665 4666 // close all open connections 4667 connection = (hci_connection_t *) hci_stack->connections; 4668 if (connection) { 4669 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4670 4671 // check state 4672 if (connection->state == SENT_DISCONNECT) return; 4673 connection->state = SENT_DISCONNECT; 4674 4675 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4676 4677 // finally, send the disconnect command 4678 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4679 return; 4680 } 4681 4682 btstack_run_loop_remove_timer(&hci_stack->timeout); 4683 4684 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4685 4686 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4687 log_info("HCI_STATE_HALTING: wait 50 ms"); 4688 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4689 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4690 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4691 btstack_run_loop_add_timer(&hci_stack->timeout); 4692 break; 4693 4694 case HCI_HALTING_CLOSE: 4695 // close left over connections (that had not been properly closed before) 4696 hci_discard_connections(); 4697 4698 log_info("HCI_STATE_HALTING, calling off"); 4699 4700 // switch mode 4701 hci_power_control_off(); 4702 4703 log_info("HCI_STATE_HALTING, emitting state"); 4704 hci_emit_state(); 4705 log_info("HCI_STATE_HALTING, done"); 4706 break; 4707 4708 case HCI_HALTING_W4_CLOSE_TIMER: 4709 // keep waiting 4710 4711 break; 4712 default: 4713 break; 4714 } 4715 }; 4716 4717 static void hci_falling_asleep_run(void){ 4718 hci_connection_t * connection; 4719 switch(hci_stack->substate) { 4720 case HCI_FALLING_ASLEEP_DISCONNECT: 4721 log_info("HCI_STATE_FALLING_ASLEEP"); 4722 // close all open connections 4723 connection = (hci_connection_t *) hci_stack->connections; 4724 if (connection){ 4725 4726 // send disconnect 4727 if (!hci_can_send_command_packet_now()) return; 4728 4729 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4730 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4731 4732 // send disconnected event right away - causes higher layer connections to get closed, too. 4733 hci_shutdown_connection(connection); 4734 return; 4735 } 4736 4737 if (hci_classic_supported()){ 4738 // disable page and inquiry scan 4739 if (!hci_can_send_command_packet_now()) return; 4740 4741 log_info("HCI_STATE_HALTING, disabling inq scans"); 4742 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4743 4744 // continue in next sub state 4745 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4746 break; 4747 } 4748 4749 /* fall through */ 4750 4751 case HCI_FALLING_ASLEEP_COMPLETE: 4752 log_info("HCI_STATE_HALTING, calling sleep"); 4753 // switch mode 4754 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4755 hci_emit_state(); 4756 break; 4757 4758 default: 4759 break; 4760 } 4761 } 4762 4763 #ifdef ENABLE_CLASSIC 4764 4765 static void hci_update_scan_enable(void){ 4766 // 2 = page scan, 1 = inq scan 4767 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4768 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4769 hci_run(); 4770 } 4771 4772 void gap_discoverable_control(uint8_t enable){ 4773 if (enable) enable = 1; // normalize argument 4774 4775 if (hci_stack->discoverable == enable){ 4776 hci_emit_discoverable_enabled(hci_stack->discoverable); 4777 return; 4778 } 4779 4780 hci_stack->discoverable = enable; 4781 hci_update_scan_enable(); 4782 } 4783 4784 void gap_connectable_control(uint8_t enable){ 4785 if (enable) enable = 1; // normalize argument 4786 4787 // don't emit event 4788 if (hci_stack->connectable == enable) return; 4789 4790 hci_stack->connectable = enable; 4791 hci_update_scan_enable(); 4792 } 4793 #endif 4794 4795 void gap_local_bd_addr(bd_addr_t address_buffer){ 4796 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4797 } 4798 4799 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4800 static void hci_host_num_completed_packets(void){ 4801 4802 // create packet manually as arrays are not supported and num_commands should not get reduced 4803 hci_reserve_packet_buffer(); 4804 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4805 4806 uint16_t size = 0; 4807 uint16_t num_handles = 0; 4808 packet[size++] = 0x35; 4809 packet[size++] = 0x0c; 4810 size++; // skip param len 4811 size++; // skip num handles 4812 4813 // add { handle, packets } entries 4814 btstack_linked_item_t * it; 4815 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4816 hci_connection_t * connection = (hci_connection_t *) it; 4817 if (connection->num_packets_completed){ 4818 little_endian_store_16(packet, size, connection->con_handle); 4819 size += 2; 4820 little_endian_store_16(packet, size, connection->num_packets_completed); 4821 size += 2; 4822 // 4823 num_handles++; 4824 connection->num_packets_completed = 0; 4825 } 4826 } 4827 4828 packet[2] = size - 3; 4829 packet[3] = num_handles; 4830 4831 hci_stack->host_completed_packets = 0; 4832 4833 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4834 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4835 4836 // release packet buffer for synchronous transport implementations 4837 if (hci_transport_synchronous()){ 4838 hci_release_packet_buffer(); 4839 hci_emit_transport_packet_sent(); 4840 } 4841 } 4842 #endif 4843 4844 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4845 UNUSED(ds); 4846 hci_stack->substate = HCI_HALTING_CLOSE; 4847 // allow packet handlers to defer final shutdown 4848 hci_emit_state(); 4849 hci_run(); 4850 } 4851 4852 static bool hci_run_acl_fragments(void){ 4853 if (hci_stack->acl_fragmentation_total_size > 0u) { 4854 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4855 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4856 if (connection) { 4857 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4858 hci_send_acl_packet_fragments(connection); 4859 return true; 4860 } 4861 } else { 4862 // connection gone -> discard further fragments 4863 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4864 hci_stack->acl_fragmentation_total_size = 0; 4865 hci_stack->acl_fragmentation_pos = 0; 4866 } 4867 } 4868 return false; 4869 } 4870 4871 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4872 static bool hci_run_iso_fragments(void){ 4873 if (hci_stack->iso_fragmentation_total_size > 0u) { 4874 // TODO: flow control 4875 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 4876 hci_send_iso_packet_fragments(); 4877 return true; 4878 } 4879 } 4880 return false; 4881 } 4882 #endif 4883 4884 #ifdef ENABLE_CLASSIC 4885 4886 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4887 static bool hci_classic_operation_active(void) { 4888 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4889 return true; 4890 } 4891 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4892 return true; 4893 } 4894 btstack_linked_item_t * it; 4895 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4896 hci_connection_t *connection = (hci_connection_t *) it; 4897 switch (connection->state) { 4898 case SENT_CREATE_CONNECTION: 4899 case SENT_CANCEL_CONNECTION: 4900 case SENT_DISCONNECT: 4901 return true; 4902 default: 4903 break; 4904 } 4905 } 4906 return false; 4907 } 4908 #endif 4909 4910 static bool hci_run_general_gap_classic(void){ 4911 4912 // assert stack is working and classic is active 4913 if (hci_classic_supported() == false) return false; 4914 if (hci_stack->state != HCI_STATE_WORKING) return false; 4915 4916 // decline incoming connections 4917 if (hci_stack->decline_reason){ 4918 uint8_t reason = hci_stack->decline_reason; 4919 hci_stack->decline_reason = 0; 4920 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4921 return true; 4922 } 4923 4924 if (hci_stack->gap_tasks_classic != 0){ 4925 hci_run_gap_tasks_classic(); 4926 return true; 4927 } 4928 4929 // start/stop inquiry 4930 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4931 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4932 if (hci_classic_operation_active() == false) 4933 #endif 4934 { 4935 uint8_t duration = hci_stack->inquiry_state; 4936 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4937 if (hci_stack->inquiry_max_period_length != 0){ 4938 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); 4939 } else { 4940 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4941 } 4942 return true; 4943 } 4944 } 4945 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4946 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4947 hci_send_cmd(&hci_inquiry_cancel); 4948 return true; 4949 } 4950 4951 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 4952 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4953 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 4954 return true; 4955 } 4956 4957 // remote name request 4958 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4959 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4960 if (hci_classic_operation_active() == false) 4961 #endif 4962 { 4963 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4964 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4965 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4966 return true; 4967 } 4968 } 4969 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4970 // Local OOB data 4971 if (hci_stack->classic_read_local_oob_data){ 4972 hci_stack->classic_read_local_oob_data = false; 4973 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4974 hci_send_cmd(&hci_read_local_extended_oob_data); 4975 } else { 4976 hci_send_cmd(&hci_read_local_oob_data); 4977 } 4978 } 4979 #endif 4980 // pairing 4981 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4982 uint8_t state = hci_stack->gap_pairing_state; 4983 uint8_t pin_code[16]; 4984 switch (state){ 4985 case GAP_PAIRING_STATE_SEND_PIN: 4986 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4987 memset(pin_code, 0, 16); 4988 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4989 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4990 break; 4991 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4992 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4993 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4994 break; 4995 case GAP_PAIRING_STATE_SEND_PASSKEY: 4996 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4997 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4998 break; 4999 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5000 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5001 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5002 break; 5003 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5004 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5005 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5006 break; 5007 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5008 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5009 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5010 break; 5011 default: 5012 break; 5013 } 5014 return true; 5015 } 5016 return false; 5017 } 5018 #endif 5019 5020 #ifdef ENABLE_BLE 5021 5022 #ifdef ENABLE_LE_CENTRAL 5023 static void hci_le_scan_stop(void){ 5024 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5025 if (hci_extended_advertising_supported()) { 5026 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5027 } else 5028 #endif 5029 { 5030 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5031 } 5032 } 5033 #endif 5034 5035 #ifdef ENABLE_LE_PERIPHERAL 5036 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5037 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5038 uint8_t operation = 0; 5039 if (pos == 0){ 5040 // first fragment or complete data 5041 operation |= 1; 5042 } 5043 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5044 // last fragment or complete data 5045 operation |= 2; 5046 } 5047 return operation; 5048 } 5049 #endif 5050 #endif 5051 5052 static bool hci_run_general_gap_le(void){ 5053 5054 btstack_linked_list_iterator_t lit; 5055 5056 // Phase 1: collect what to stop 5057 5058 #ifdef ENABLE_LE_CENTRAL 5059 bool scanning_stop = false; 5060 bool connecting_stop = false; 5061 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5062 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5063 bool periodic_sync_stop = false; 5064 #endif 5065 #endif 5066 #endif 5067 5068 #ifdef ENABLE_LE_PERIPHERAL 5069 bool advertising_stop = false; 5070 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5071 le_advertising_set_t * advertising_stop_set = NULL; 5072 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5073 bool periodic_advertising_stop = false; 5074 #endif 5075 #endif 5076 #endif 5077 5078 // check if own address changes 5079 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5080 5081 // check if whitelist needs modification 5082 bool whitelist_modification_pending = false; 5083 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5084 while (btstack_linked_list_iterator_has_next(&lit)){ 5085 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5086 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5087 whitelist_modification_pending = true; 5088 break; 5089 } 5090 } 5091 5092 // check if resolving list needs modification 5093 bool resolving_list_modification_pending = false; 5094 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5095 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5096 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5097 resolving_list_modification_pending = true; 5098 } 5099 #endif 5100 5101 #ifdef ENABLE_LE_CENTRAL 5102 5103 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5104 // check if periodic advertiser list needs modification 5105 bool periodic_list_modification_pending = false; 5106 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5107 while (btstack_linked_list_iterator_has_next(&lit)){ 5108 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5109 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5110 periodic_list_modification_pending = true; 5111 break; 5112 } 5113 } 5114 #endif 5115 5116 // scanning control 5117 if (hci_stack->le_scanning_active) { 5118 // stop if: 5119 // - parameter change required 5120 // - it's disabled 5121 // - whitelist change required but used for scanning 5122 // - resolving list modified 5123 // - own address changes 5124 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5125 if ((hci_stack->le_scanning_param_update) || 5126 !hci_stack->le_scanning_enabled || 5127 (scanning_uses_whitelist && whitelist_modification_pending) || 5128 resolving_list_modification_pending || 5129 random_address_change){ 5130 5131 scanning_stop = true; 5132 } 5133 } 5134 5135 // connecting control 5136 bool connecting_with_whitelist; 5137 switch (hci_stack->le_connecting_state){ 5138 case LE_CONNECTING_DIRECT: 5139 case LE_CONNECTING_WHITELIST: 5140 // stop connecting if: 5141 // - connecting uses white and whitelist modification pending 5142 // - if it got disabled 5143 // - resolving list modified 5144 // - own address changes 5145 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5146 if ((connecting_with_whitelist && whitelist_modification_pending) || 5147 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5148 resolving_list_modification_pending || 5149 random_address_change) { 5150 5151 connecting_stop = true; 5152 } 5153 break; 5154 default: 5155 break; 5156 } 5157 5158 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5159 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5160 // periodic sync control 5161 bool sync_with_advertiser_list; 5162 switch(hci_stack->le_periodic_sync_state){ 5163 case LE_CONNECTING_DIRECT: 5164 case LE_CONNECTING_WHITELIST: 5165 // stop sync if: 5166 // - sync with advertiser list and advertiser list modification pending 5167 // - if it got disabled 5168 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5169 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5170 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5171 periodic_sync_stop = true; 5172 } 5173 break; 5174 default: 5175 break; 5176 } 5177 #endif 5178 #endif 5179 5180 #endif /* ENABLE_LE_CENTRAL */ 5181 5182 #ifdef ENABLE_LE_PERIPHERAL 5183 // le advertisement control 5184 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5185 // stop if: 5186 // - parameter change required 5187 // - random address used in advertising and changes 5188 // - it's disabled 5189 // - whitelist change required but used for advertisement filter policy 5190 // - resolving list modified 5191 // - own address changes 5192 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5193 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5194 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5195 if (advertising_change || 5196 (advertising_uses_random_address && random_address_change) || 5197 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5198 (advertising_uses_whitelist && whitelist_modification_pending) || 5199 resolving_list_modification_pending || 5200 random_address_change) { 5201 5202 advertising_stop = true; 5203 } 5204 } 5205 5206 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5207 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5208 btstack_linked_list_iterator_t it; 5209 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5210 while (btstack_linked_list_iterator_has_next(&it)){ 5211 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5212 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5213 // stop if: 5214 // - parameter change required 5215 // - random address used in connectable advertising and changes 5216 // - it's disabled 5217 // - whitelist change required but used for advertisement filter policy 5218 // - resolving list modified 5219 // - own address changes 5220 // - advertisement set will be removed 5221 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5222 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5223 bool advertising_uses_random_address = 5224 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5225 advertising_connectable; 5226 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5227 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5228 bool advertising_set_random_address_change = 5229 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5230 bool advertising_set_will_be_removed = 5231 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5232 if (advertising_parameter_change || 5233 (advertising_uses_random_address && advertising_set_random_address_change) || 5234 (advertising_enabled == false) || 5235 (advertising_uses_whitelist && whitelist_modification_pending) || 5236 resolving_list_modification_pending || 5237 advertising_set_will_be_removed) { 5238 5239 advertising_stop = true; 5240 advertising_stop_set = advertising_set; 5241 break; 5242 } 5243 } 5244 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5245 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5246 // stop if: 5247 // - it's disabled 5248 // - parameter change required 5249 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5250 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5251 if ((periodic_enabled == false) || periodic_parameter_change){ 5252 periodic_advertising_stop = true; 5253 advertising_stop_set = advertising_set; 5254 } 5255 } 5256 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5257 } 5258 } 5259 #endif 5260 5261 #endif 5262 5263 5264 // Phase 2: stop everything that should be off during modifications 5265 5266 #ifdef ENABLE_LE_CENTRAL 5267 if (scanning_stop){ 5268 hci_stack->le_scanning_active = false; 5269 hci_le_scan_stop(); 5270 return true; 5271 } 5272 5273 if (connecting_stop){ 5274 hci_send_cmd(&hci_le_create_connection_cancel); 5275 return true; 5276 } 5277 5278 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5279 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5280 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5281 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5282 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5283 return true; 5284 } 5285 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5286 if (periodic_sync_stop){ 5287 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5288 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5289 return true; 5290 } 5291 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5292 #endif 5293 #endif 5294 5295 #ifdef ENABLE_LE_PERIPHERAL 5296 if (advertising_stop){ 5297 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5298 if (hci_extended_advertising_supported()) { 5299 uint8_t advertising_stop_handle; 5300 if (advertising_stop_set != NULL){ 5301 advertising_stop_handle = advertising_stop_set->advertising_handle; 5302 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5303 } else { 5304 advertising_stop_handle = 0; 5305 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5306 } 5307 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5308 const uint16_t durations[] = { 0 }; 5309 const uint16_t max_events[] = { 0 }; 5310 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5311 } else 5312 #endif 5313 { 5314 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5315 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5316 } 5317 return true; 5318 } 5319 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5320 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5321 if (periodic_advertising_stop){ 5322 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5323 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5324 return true; 5325 } 5326 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5327 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5328 #endif 5329 5330 // Phase 3: modify 5331 5332 if (random_address_change){ 5333 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5334 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5335 if (hci_extended_advertising_supported()) { 5336 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5337 } 5338 #endif 5339 { 5340 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5341 } 5342 return true; 5343 } 5344 5345 #ifdef ENABLE_LE_CENTRAL 5346 if (hci_stack->le_scanning_param_update){ 5347 hci_stack->le_scanning_param_update = false; 5348 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5349 if (hci_extended_advertising_supported()){ 5350 // prepare arrays for all PHYs 5351 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5352 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5353 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5354 uint8_t scanning_phys = 1; // LE 1M PHY 5355 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5356 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5357 } else 5358 #endif 5359 { 5360 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5361 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5362 } 5363 return true; 5364 } 5365 #endif 5366 5367 #ifdef ENABLE_LE_PERIPHERAL 5368 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5369 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5370 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5371 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5372 if (hci_extended_advertising_supported()){ 5373 // map advertisment type to advertising event properties 5374 uint16_t adv_event_properties = 0; 5375 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5376 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5377 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5378 } 5379 hci_stack->le_advertising_set_in_current_command = 0; 5380 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5381 0, 5382 adv_event_properties, 5383 hci_stack->le_advertisements_interval_min, 5384 hci_stack->le_advertisements_interval_max, 5385 hci_stack->le_advertisements_channel_map, 5386 hci_stack->le_advertisements_own_addr_type, 5387 hci_stack->le_advertisements_direct_address_type, 5388 hci_stack->le_advertisements_direct_address, 5389 hci_stack->le_advertisements_filter_policy, 5390 0x7f, // tx power: no preference 5391 0x01, // primary adv phy: LE 1M 5392 0, // secondary adv max skip 5393 0, // secondary adv phy 5394 0, // adv sid 5395 0 // scan request notification 5396 ); 5397 } 5398 #endif 5399 { 5400 hci_send_cmd(&hci_le_set_advertising_parameters, 5401 hci_stack->le_advertisements_interval_min, 5402 hci_stack->le_advertisements_interval_max, 5403 hci_stack->le_advertisements_type, 5404 hci_stack->le_advertisements_own_addr_type, 5405 hci_stack->le_advertisements_direct_address_type, 5406 hci_stack->le_advertisements_direct_address, 5407 hci_stack->le_advertisements_channel_map, 5408 hci_stack->le_advertisements_filter_policy); 5409 } 5410 return true; 5411 } 5412 5413 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5414 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5415 uint8_t adv_data_clean[31]; 5416 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5417 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5418 hci_stack->le_advertisements_data_len); 5419 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5420 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5421 if (hci_extended_advertising_supported()){ 5422 hci_stack->le_advertising_set_in_current_command = 0; 5423 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5424 } else 5425 #endif 5426 { 5427 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5428 } 5429 return true; 5430 } 5431 5432 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5433 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5434 uint8_t scan_data_clean[31]; 5435 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5436 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5437 hci_stack->le_scan_response_data_len); 5438 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5439 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5440 if (hci_extended_advertising_supported()){ 5441 hci_stack->le_advertising_set_in_current_command = 0; 5442 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5443 } else 5444 #endif 5445 { 5446 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5447 } 5448 return true; 5449 } 5450 5451 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5452 if (hci_extended_advertising_supported()) { 5453 btstack_linked_list_iterator_t it; 5454 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5455 while (btstack_linked_list_iterator_has_next(&it)){ 5456 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5457 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5458 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5459 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5460 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5461 return true; 5462 } 5463 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5464 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5465 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5466 return true; 5467 } 5468 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5469 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5470 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5471 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5472 advertising_set->advertising_handle, 5473 advertising_set->extended_params.advertising_event_properties, 5474 advertising_set->extended_params.primary_advertising_interval_min, 5475 advertising_set->extended_params.primary_advertising_interval_max, 5476 advertising_set->extended_params.primary_advertising_channel_map, 5477 advertising_set->extended_params.own_address_type, 5478 advertising_set->extended_params.peer_address_type, 5479 advertising_set->extended_params.peer_address, 5480 advertising_set->extended_params.advertising_filter_policy, 5481 advertising_set->extended_params.advertising_tx_power, 5482 advertising_set->extended_params.primary_advertising_phy, 5483 advertising_set->extended_params.secondary_advertising_max_skip, 5484 advertising_set->extended_params.secondary_advertising_phy, 5485 advertising_set->extended_params.advertising_sid, 5486 advertising_set->extended_params.scan_request_notification_enable 5487 ); 5488 return true; 5489 } 5490 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5491 uint16_t pos = advertising_set->adv_data_pos; 5492 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5493 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5494 if ((operation & 0x02) != 0){ 5495 // last fragment or complete data 5496 operation |= 2; 5497 advertising_set->adv_data_pos = 0; 5498 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5499 } else { 5500 advertising_set->adv_data_pos += data_to_upload; 5501 } 5502 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5503 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5504 return true; 5505 } 5506 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5507 uint16_t pos = advertising_set->scan_data_pos; 5508 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5509 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5510 if ((operation & 0x02) != 0){ 5511 advertising_set->scan_data_pos = 0; 5512 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5513 } else { 5514 advertising_set->scan_data_pos += data_to_upload; 5515 } 5516 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5517 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5518 return true; 5519 } 5520 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5521 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5522 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5523 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5524 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5525 advertising_set->advertising_handle, 5526 advertising_set->periodic_params.periodic_advertising_interval_min, 5527 advertising_set->periodic_params.periodic_advertising_interval_max, 5528 advertising_set->periodic_params.periodic_advertising_properties); 5529 return true; 5530 } 5531 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5532 uint16_t pos = advertising_set->periodic_data_pos; 5533 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5534 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5535 if ((operation & 0x02) != 0){ 5536 // last fragment or complete data 5537 operation |= 2; 5538 advertising_set->periodic_data_pos = 0; 5539 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5540 } else { 5541 advertising_set->periodic_data_pos += data_to_upload; 5542 } 5543 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5544 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5545 return true; 5546 } 5547 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5548 } 5549 } 5550 #endif 5551 5552 #endif 5553 5554 #ifdef ENABLE_LE_CENTRAL 5555 // if connect with whitelist was active and is not cancelled yet, wait until next time 5556 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5557 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5558 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 5559 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 5560 #endif 5561 #endif 5562 5563 // LE Whitelist Management 5564 if (whitelist_modification_pending){ 5565 // add/remove entries 5566 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5567 while (btstack_linked_list_iterator_has_next(&lit)){ 5568 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5569 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5570 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5571 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5572 return true; 5573 } 5574 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5575 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5576 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5577 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5578 return true; 5579 } 5580 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5581 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5582 btstack_memory_whitelist_entry_free(entry); 5583 } 5584 } 5585 } 5586 5587 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5588 // LE Resolving List Management 5589 if (resolving_list_supported) { 5590 uint16_t i; 5591 switch (hci_stack->le_resolving_list_state) { 5592 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5593 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5594 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5595 return true; 5596 case LE_RESOLVING_LIST_READ_SIZE: 5597 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5598 hci_send_cmd(&hci_le_read_resolving_list_size); 5599 return true; 5600 case LE_RESOLVING_LIST_SEND_CLEAR: 5601 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5602 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5603 sizeof(hci_stack->le_resolving_list_add_entries)); 5604 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5605 sizeof(hci_stack->le_resolving_list_remove_entries)); 5606 hci_send_cmd(&hci_le_clear_resolving_list); 5607 return true; 5608 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5609 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5610 uint8_t offset = i >> 3; 5611 uint8_t mask = 1 << (i & 7); 5612 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5613 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5614 bd_addr_t peer_identity_addreses; 5615 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5616 sm_key_t peer_irk; 5617 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5618 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5619 5620 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5621 // trigger whitelist entry 'update' (work around for controller bug) 5622 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5623 while (btstack_linked_list_iterator_has_next(&lit)) { 5624 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5625 if (entry->address_type != peer_identity_addr_type) continue; 5626 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5627 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5628 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5629 } 5630 #endif 5631 5632 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5633 peer_identity_addreses); 5634 return true; 5635 } 5636 5637 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5638 5639 /* fall through */ 5640 5641 case LE_RESOLVING_LIST_ADD_ENTRIES: 5642 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5643 uint8_t offset = i >> 3; 5644 uint8_t mask = 1 << (i & 7); 5645 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5646 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5647 bd_addr_t peer_identity_addreses; 5648 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5649 sm_key_t peer_irk; 5650 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5651 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5652 const uint8_t *local_irk = gap_get_persistent_irk(); 5653 // command uses format specifier 'P' that stores 16-byte value without flip 5654 uint8_t local_irk_flipped[16]; 5655 uint8_t peer_irk_flipped[16]; 5656 reverse_128(local_irk, local_irk_flipped); 5657 reverse_128(peer_irk, peer_irk_flipped); 5658 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5659 peer_irk_flipped, local_irk_flipped); 5660 return true; 5661 } 5662 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5663 break; 5664 5665 default: 5666 break; 5667 } 5668 } 5669 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5670 #endif 5671 5672 #ifdef ENABLE_LE_CENTRAL 5673 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5674 // LE Whitelist Management 5675 if (periodic_list_modification_pending){ 5676 // add/remove entries 5677 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5678 while (btstack_linked_list_iterator_has_next(&lit)){ 5679 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5680 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 5681 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 5682 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 5683 return true; 5684 } 5685 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 5686 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 5687 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 5688 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address); 5689 return true; 5690 } 5691 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 5692 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 5693 btstack_memory_periodic_advertiser_list_entry_free(entry); 5694 } 5695 } 5696 } 5697 #endif 5698 #endif 5699 5700 // post-pone all actions until stack is fully working 5701 if (hci_stack->state != HCI_STATE_WORKING) return false; 5702 5703 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5704 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5705 5706 // Phase 4: restore state 5707 5708 #ifdef ENABLE_LE_CENTRAL 5709 // re-start scanning 5710 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5711 hci_stack->le_scanning_active = true; 5712 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5713 if (hci_extended_advertising_supported()){ 5714 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5715 } else 5716 #endif 5717 { 5718 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5719 } 5720 return true; 5721 } 5722 #endif 5723 5724 #ifdef ENABLE_LE_CENTRAL 5725 // re-start connecting 5726 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5727 bd_addr_t null_addr; 5728 memset(null_addr, 0, 6); 5729 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5730 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5731 hci_send_cmd(&hci_le_create_connection, 5732 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5733 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5734 1, // use whitelist 5735 0, // peer address type 5736 null_addr, // peer bd addr 5737 hci_stack->le_connection_own_addr_type, // our addr type: 5738 hci_stack->le_connection_interval_min, // conn interval min 5739 hci_stack->le_connection_interval_max, // conn interval max 5740 hci_stack->le_connection_latency, // conn latency 5741 hci_stack->le_supervision_timeout, // conn latency 5742 hci_stack->le_minimum_ce_length, // min ce length 5743 hci_stack->le_maximum_ce_length // max ce length 5744 ); 5745 return true; 5746 } 5747 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5748 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 5749 switch(hci_stack->le_periodic_sync_request){ 5750 case LE_CONNECTING_DIRECT: 5751 case LE_CONNECTING_WHITELIST: 5752 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 5753 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 5754 hci_stack->le_periodic_sync_options, 5755 hci_stack->le_periodic_sync_advertising_sid, 5756 hci_stack->le_periodic_sync_advertiser_address_type, 5757 hci_stack->le_periodic_sync_advertiser_address, 5758 hci_stack->le_periodic_sync_skip, 5759 hci_stack->le_periodic_sync_timeout, 5760 hci_stack->le_periodic_sync_cte_type); 5761 return true; 5762 default: 5763 break; 5764 } 5765 } 5766 #endif 5767 #endif 5768 5769 #ifdef ENABLE_LE_PERIPHERAL 5770 // re-start advertising 5771 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5772 // check if advertisements should be enabled given 5773 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5774 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5775 5776 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5777 if (hci_extended_advertising_supported()){ 5778 const uint8_t advertising_handles[] = { 0 }; 5779 const uint16_t durations[] = { 0 }; 5780 const uint16_t max_events[] = { 0 }; 5781 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5782 } else 5783 #endif 5784 { 5785 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5786 } 5787 return true; 5788 } 5789 5790 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5791 if (hci_extended_advertising_supported()) { 5792 btstack_linked_list_iterator_t it; 5793 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5794 while (btstack_linked_list_iterator_has_next(&it)) { 5795 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5796 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5797 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5798 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5799 const uint16_t durations[] = { advertising_set->enable_timeout }; 5800 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5801 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5802 return true; 5803 } 5804 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5805 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5806 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5807 uint8_t enable = 1; 5808 if (advertising_set->periodic_include_adi){ 5809 enable |= 2; 5810 } 5811 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5812 return true; 5813 } 5814 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5815 } 5816 } 5817 #endif 5818 #endif 5819 5820 return false; 5821 } 5822 #endif 5823 5824 static bool hci_run_general_pending_commands(void){ 5825 btstack_linked_item_t * it; 5826 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5827 hci_connection_t * connection = (hci_connection_t *) it; 5828 5829 switch(connection->state){ 5830 case SEND_CREATE_CONNECTION: 5831 switch(connection->address_type){ 5832 #ifdef ENABLE_CLASSIC 5833 case BD_ADDR_TYPE_ACL: 5834 log_info("sending hci_create_connection"); 5835 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5836 break; 5837 #endif 5838 default: 5839 #ifdef ENABLE_BLE 5840 #ifdef ENABLE_LE_CENTRAL 5841 log_info("sending hci_le_create_connection"); 5842 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5843 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5844 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5845 if (hci_extended_advertising_supported()) { 5846 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 5847 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 5848 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 5849 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 5850 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 5851 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 5852 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 5853 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 5854 hci_send_cmd(&hci_le_extended_create_connection, 5855 0, // don't use whitelist 5856 hci_stack->le_connection_own_addr_type, // our addr type: 5857 connection->address_type, // peer address type 5858 connection->address, // peer bd addr 5859 1, // initiating PHY - 1M 5860 le_connection_scan_interval, // conn scan interval 5861 le_connection_scan_window, // conn scan windows 5862 le_connection_interval_min, // conn interval min 5863 le_connection_interval_max, // conn interval max 5864 le_connection_latency, // conn latency 5865 le_supervision_timeout, // conn latency 5866 le_minimum_ce_length, // min ce length 5867 le_maximum_ce_length // max ce length 5868 ); } 5869 else 5870 #endif 5871 { 5872 hci_send_cmd(&hci_le_create_connection, 5873 hci_stack->le_connection_scan_interval, // conn scan interval 5874 hci_stack->le_connection_scan_window, // conn scan windows 5875 0, // don't use whitelist 5876 connection->address_type, // peer address type 5877 connection->address, // peer bd addr 5878 hci_stack->le_connection_own_addr_type, // our addr type: 5879 hci_stack->le_connection_interval_min, // conn interval min 5880 hci_stack->le_connection_interval_max, // conn interval max 5881 hci_stack->le_connection_latency, // conn latency 5882 hci_stack->le_supervision_timeout, // conn latency 5883 hci_stack->le_minimum_ce_length, // min ce length 5884 hci_stack->le_maximum_ce_length // max ce length 5885 ); 5886 } 5887 connection->state = SENT_CREATE_CONNECTION; 5888 #endif 5889 #endif 5890 break; 5891 } 5892 return true; 5893 5894 #ifdef ENABLE_CLASSIC 5895 case RECEIVED_CONNECTION_REQUEST: 5896 connection->role = HCI_ROLE_SLAVE; 5897 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5898 log_info("sending hci_accept_connection_request"); 5899 connection->state = ACCEPTED_CONNECTION_REQUEST; 5900 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5901 return true; 5902 } 5903 break; 5904 #endif 5905 5906 #ifdef ENABLE_BLE 5907 #ifdef ENABLE_LE_CENTRAL 5908 case SEND_CANCEL_CONNECTION: 5909 connection->state = SENT_CANCEL_CONNECTION; 5910 hci_send_cmd(&hci_le_create_connection_cancel); 5911 return true; 5912 #endif 5913 #endif 5914 case SEND_DISCONNECT: 5915 connection->state = SENT_DISCONNECT; 5916 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5917 return true; 5918 5919 default: 5920 break; 5921 } 5922 5923 // no further commands if connection is about to get shut down 5924 if (connection->state == SENT_DISCONNECT) continue; 5925 5926 #ifdef ENABLE_CLASSIC 5927 5928 // Handling link key request requires remote supported features 5929 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5930 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5931 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5932 5933 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5934 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5935 if (have_link_key && security_level_sufficient){ 5936 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5937 } else { 5938 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5939 } 5940 return true; 5941 } 5942 5943 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5944 log_info("denying to pin request"); 5945 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5946 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5947 return true; 5948 } 5949 5950 // security assessment requires remote features 5951 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5952 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5953 hci_ssp_assess_security_on_io_cap_request(connection); 5954 // 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 5955 } 5956 5957 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5958 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5959 // set authentication requirements: 5960 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5961 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5962 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5963 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5964 authreq |= 1; 5965 } 5966 bool bonding = hci_stack->bondable; 5967 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5968 // if we have received IO Cap Response, we're in responder role 5969 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5970 if (bonding && !remote_bonding){ 5971 log_info("Remote not bonding, dropping local flag"); 5972 bonding = false; 5973 } 5974 } 5975 if (bonding){ 5976 if (connection->bonding_flags & BONDING_DEDICATED){ 5977 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5978 } else { 5979 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5980 } 5981 } 5982 uint8_t have_oob_data = 0; 5983 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5984 if (connection->classic_oob_c_192 != NULL){ 5985 have_oob_data |= 1; 5986 } 5987 if (connection->classic_oob_c_256 != NULL){ 5988 have_oob_data |= 2; 5989 } 5990 #endif 5991 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5992 return true; 5993 } 5994 5995 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5996 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5997 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5998 return true; 5999 } 6000 6001 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6002 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6003 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6004 const uint8_t zero[16] = { 0 }; 6005 const uint8_t * r_192 = zero; 6006 const uint8_t * c_192 = zero; 6007 const uint8_t * r_256 = zero; 6008 const uint8_t * c_256 = zero; 6009 // verify P-256 OOB 6010 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6011 c_256 = connection->classic_oob_c_256; 6012 if (connection->classic_oob_r_256 != NULL) { 6013 r_256 = connection->classic_oob_r_256; 6014 } 6015 } 6016 // verify P-192 OOB 6017 if ((connection->classic_oob_c_192 != NULL)) { 6018 c_192 = connection->classic_oob_c_192; 6019 if (connection->classic_oob_r_192 != NULL) { 6020 r_192 = connection->classic_oob_r_192; 6021 } 6022 } 6023 6024 // assess security 6025 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6026 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6027 if (need_level_4 && !can_reach_level_4){ 6028 log_info("Level 4 required, but not possible -> abort"); 6029 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6030 // send oob negative reply 6031 c_256 = NULL; 6032 c_192 = NULL; 6033 } 6034 6035 // Reply 6036 if (c_256 != zero) { 6037 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6038 } else if (c_192 != zero){ 6039 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6040 } else { 6041 hci_stack->classic_oob_con_handle = connection->con_handle; 6042 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6043 } 6044 return true; 6045 } 6046 #endif 6047 6048 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6049 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6050 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6051 return true; 6052 } 6053 6054 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6055 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6056 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6057 return true; 6058 } 6059 6060 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6061 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6062 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6063 return true; 6064 } 6065 6066 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6067 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6068 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6069 connection->state = SENT_DISCONNECT; 6070 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6071 return true; 6072 } 6073 6074 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6075 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6076 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6077 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6078 return true; 6079 } 6080 6081 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6082 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6083 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6084 return true; 6085 } 6086 6087 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6088 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6089 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6090 return true; 6091 } 6092 6093 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6094 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6095 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6096 return true; 6097 } 6098 6099 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6100 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6101 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6102 return true; 6103 } 6104 6105 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6106 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6107 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6108 return true; 6109 } 6110 #endif 6111 6112 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6113 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6114 #ifdef ENABLE_CLASSIC 6115 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6116 #endif 6117 if (connection->state != SENT_DISCONNECT){ 6118 connection->state = SENT_DISCONNECT; 6119 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6120 return true; 6121 } 6122 } 6123 6124 #ifdef ENABLE_CLASSIC 6125 uint16_t sniff_min_interval; 6126 switch (connection->sniff_min_interval){ 6127 case 0: 6128 break; 6129 case 0xffff: 6130 connection->sniff_min_interval = 0; 6131 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6132 return true; 6133 default: 6134 sniff_min_interval = connection->sniff_min_interval; 6135 connection->sniff_min_interval = 0; 6136 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6137 return true; 6138 } 6139 6140 if (connection->sniff_subrating_max_latency != 0xffff){ 6141 uint16_t max_latency = connection->sniff_subrating_max_latency; 6142 connection->sniff_subrating_max_latency = 0; 6143 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6144 return true; 6145 } 6146 6147 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6148 uint8_t service_type = (uint8_t) connection->qos_service_type; 6149 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6150 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); 6151 return true; 6152 } 6153 6154 if (connection->request_role != HCI_ROLE_INVALID){ 6155 hci_role_t role = connection->request_role; 6156 connection->request_role = HCI_ROLE_INVALID; 6157 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6158 return true; 6159 } 6160 #endif 6161 6162 if (connection->gap_connection_tasks != 0){ 6163 #ifdef ENABLE_CLASSIC 6164 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6165 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6166 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6167 return true; 6168 } 6169 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6170 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6171 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6172 return true; 6173 } 6174 #endif 6175 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6176 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6177 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6178 return true; 6179 } 6180 } 6181 6182 #ifdef ENABLE_BLE 6183 switch (connection->le_con_parameter_update_state){ 6184 // response to L2CAP CON PARAMETER UPDATE REQUEST 6185 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6186 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6187 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6188 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6189 0x0000, 0xffff); 6190 return true; 6191 case CON_PARAMETER_UPDATE_REPLY: 6192 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6193 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6194 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6195 0x0000, 0xffff); 6196 return true; 6197 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6198 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6199 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6200 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6201 return true; 6202 default: 6203 break; 6204 } 6205 if (connection->le_phy_update_all_phys != 0xffu){ 6206 uint8_t all_phys = connection->le_phy_update_all_phys; 6207 connection->le_phy_update_all_phys = 0xff; 6208 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); 6209 return true; 6210 } 6211 #endif 6212 } 6213 return false; 6214 } 6215 6216 static void hci_run(void){ 6217 6218 // stack state sub statemachines 6219 switch (hci_stack->state) { 6220 case HCI_STATE_INITIALIZING: 6221 hci_initializing_run(); 6222 break; 6223 case HCI_STATE_HALTING: 6224 hci_halting_run(); 6225 break; 6226 case HCI_STATE_FALLING_ASLEEP: 6227 hci_falling_asleep_run(); 6228 break; 6229 default: 6230 break; 6231 } 6232 6233 // allow to run after initialization to working transition 6234 if (hci_stack->state != HCI_STATE_WORKING){ 6235 return; 6236 } 6237 6238 bool done; 6239 6240 // send continuation fragments first, as they block the prepared packet buffer 6241 done = hci_run_acl_fragments(); 6242 if (done) return; 6243 6244 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6245 done = hci_run_iso_fragments(); 6246 if (done) return; 6247 #endif 6248 6249 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6250 // send host num completed packets next as they don't require num_cmd_packets > 0 6251 if (!hci_can_send_comand_packet_transport()) return; 6252 if (hci_stack->host_completed_packets){ 6253 hci_host_num_completed_packets(); 6254 return; 6255 } 6256 #endif 6257 6258 if (!hci_can_send_command_packet_now()) return; 6259 6260 // global/non-connection oriented commands 6261 6262 6263 #ifdef ENABLE_CLASSIC 6264 // general gap classic 6265 done = hci_run_general_gap_classic(); 6266 if (done) return; 6267 #endif 6268 6269 #ifdef ENABLE_BLE 6270 // general gap le 6271 done = hci_run_general_gap_le(); 6272 if (done) return; 6273 #endif 6274 6275 // send pending HCI commands 6276 hci_run_general_pending_commands(); 6277 } 6278 6279 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 6280 // house-keeping 6281 6282 #ifdef ENABLE_CLASSIC 6283 bd_addr_t addr; 6284 hci_connection_t * conn; 6285 #endif 6286 #ifdef ENABLE_LE_CENTRAL 6287 uint8_t initiator_filter_policy; 6288 #endif 6289 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6290 uint8_t i; 6291 uint8_t num_cis; 6292 hci_con_handle_t cis_handle; 6293 uint8_t status; 6294 #endif 6295 6296 uint16_t opcode = little_endian_read_16(packet, 0); 6297 switch (opcode) { 6298 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 6299 hci_stack->loopback_mode = packet[3]; 6300 break; 6301 6302 #ifdef ENABLE_CLASSIC 6303 case HCI_OPCODE_HCI_CREATE_CONNECTION: 6304 reverse_bd_addr(&packet[3], addr); 6305 log_info("Create_connection to %s", bd_addr_to_str(addr)); 6306 6307 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 6308 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 6309 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 6310 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 6311 } 6312 6313 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6314 if (!conn) { 6315 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6316 if (!conn) { 6317 // notify client that alloc failed 6318 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6319 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 6320 } 6321 conn->state = SEND_CREATE_CONNECTION; 6322 conn->role = HCI_ROLE_MASTER; 6323 } 6324 6325 log_info("conn state %u", conn->state); 6326 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 6327 switch (conn->state) { 6328 // if connection active exists 6329 case OPEN: 6330 // and OPEN, emit connection complete command 6331 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 6332 // packet not sent to controller 6333 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6334 case RECEIVED_DISCONNECTION_COMPLETE: 6335 // create connection triggered in disconnect complete event, let's do it now 6336 break; 6337 case SEND_CREATE_CONNECTION: 6338 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 6339 if (hci_classic_operation_active()){ 6340 return ERROR_CODE_SUCCESS; 6341 } 6342 #endif 6343 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 6344 break; 6345 default: 6346 // otherwise, just ignore as it is already in the open process 6347 // packet not sent to controller 6348 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6349 } 6350 conn->state = SENT_CREATE_CONNECTION; 6351 6352 // track outgoing connection 6353 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 6354 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 6355 break; 6356 6357 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 6358 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 6359 // setup_synchronous_connection? Voice setting at offset 22 6360 // TODO: compare to current setting if sco connection already active 6361 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 6362 break; 6363 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 6364 // accept_synchronous_connection? Voice setting at offset 18 6365 // TODO: compare to current setting if sco connection already active 6366 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 6367 // track outgoing connection 6368 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 6369 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 6370 break; 6371 #endif 6372 #endif 6373 6374 #ifdef ENABLE_BLE 6375 #ifdef ENABLE_LE_CENTRAL 6376 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6377 // white list used? 6378 initiator_filter_policy = packet[7]; 6379 switch (initiator_filter_policy) { 6380 case 0: 6381 // whitelist not used 6382 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6383 break; 6384 case 1: 6385 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6386 break; 6387 default: 6388 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6389 break; 6390 } 6391 // track outgoing connection 6392 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6393 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6394 break; 6395 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6396 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6397 break; 6398 #endif 6399 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6400 #ifdef ENABLE_LE_CENTRAL 6401 case HCI_OPCODE_HCI_LE_CREATE_CIS: 6402 status = ERROR_CODE_SUCCESS; 6403 num_cis = packet[3]; 6404 // setup hci_iso_streams 6405 for (i=0;i<num_cis;i++){ 6406 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 4 + (4 * i)); 6407 status = hci_iso_stream_create(cis_handle); 6408 if (status != ERROR_CODE_SUCCESS) { 6409 break; 6410 } 6411 } 6412 // free structs on error 6413 if (status != ERROR_CODE_SUCCESS){ 6414 hci_iso_stream_requested_finalize(); 6415 return status; 6416 } 6417 break; 6418 #endif /* ENABLE_LE_CENTRAL */ 6419 #ifdef ENABLE_LE_PERIPHERAL 6420 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 6421 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 3); 6422 status = hci_iso_stream_create(cis_handle); 6423 if (status != ERROR_CODE_SUCCESS){ 6424 return status; 6425 } 6426 break; 6427 #endif /* ENABLE_LE_PERIPHERAL */ 6428 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6429 #endif /* ENABLE_BLE */ 6430 default: 6431 break; 6432 } 6433 6434 hci_stack->num_cmd_packets--; 6435 6436 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6437 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6438 if (err != 0){ 6439 return ERROR_CODE_HARDWARE_FAILURE; 6440 } 6441 return ERROR_CODE_SUCCESS; 6442 } 6443 6444 // disconnect because of security block 6445 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6446 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6447 if (!connection) return; 6448 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6449 } 6450 6451 6452 // Configure Secure Simple Pairing 6453 6454 #ifdef ENABLE_CLASSIC 6455 6456 // enable will enable SSP during init 6457 void gap_ssp_set_enable(int enable){ 6458 hci_stack->ssp_enable = enable; 6459 } 6460 6461 static int hci_local_ssp_activated(void){ 6462 return gap_ssp_supported() && hci_stack->ssp_enable; 6463 } 6464 6465 // if set, BTstack will respond to io capability request using authentication requirement 6466 void gap_ssp_set_io_capability(int io_capability){ 6467 hci_stack->ssp_io_capability = io_capability; 6468 } 6469 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6470 hci_stack->ssp_authentication_requirement = authentication_requirement; 6471 } 6472 6473 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6474 void gap_ssp_set_auto_accept(int auto_accept){ 6475 hci_stack->ssp_auto_accept = auto_accept; 6476 } 6477 6478 void gap_secure_connections_enable(bool enable){ 6479 hci_stack->secure_connections_enable = enable; 6480 } 6481 bool gap_secure_connections_active(void){ 6482 return hci_stack->secure_connections_active; 6483 } 6484 6485 #endif 6486 6487 // va_list part of hci_send_cmd 6488 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6489 if (!hci_can_send_command_packet_now()){ 6490 log_error("hci_send_cmd called but cannot send packet now"); 6491 return ERROR_CODE_COMMAND_DISALLOWED; 6492 } 6493 6494 // for HCI INITIALIZATION 6495 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6496 hci_stack->last_cmd_opcode = cmd->opcode; 6497 6498 hci_reserve_packet_buffer(); 6499 uint8_t * packet = hci_stack->hci_packet_buffer; 6500 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6501 uint8_t status = hci_send_cmd_packet(packet, size); 6502 6503 // release packet buffer on error or for synchronous transport implementations 6504 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6505 hci_release_packet_buffer(); 6506 hci_emit_transport_packet_sent(); 6507 } 6508 6509 return status; 6510 } 6511 6512 /** 6513 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6514 */ 6515 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6516 va_list argptr; 6517 va_start(argptr, cmd); 6518 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6519 va_end(argptr); 6520 return status; 6521 } 6522 6523 // Create various non-HCI events. 6524 // TODO: generalize, use table similar to hci_create_command 6525 6526 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6527 // dump packet 6528 if (dump) { 6529 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 6530 } 6531 6532 // dispatch to all event handlers 6533 btstack_linked_list_iterator_t it; 6534 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6535 while (btstack_linked_list_iterator_has_next(&it)){ 6536 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6537 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6538 } 6539 } 6540 6541 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6542 if (!hci_stack->acl_packet_handler) return; 6543 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6544 } 6545 6546 #ifdef ENABLE_CLASSIC 6547 static void hci_notify_if_sco_can_send_now(void){ 6548 // notify SCO sender if waiting 6549 if (!hci_stack->sco_waiting_for_can_send_now) return; 6550 if (hci_can_send_sco_packet_now()){ 6551 hci_stack->sco_waiting_for_can_send_now = 0; 6552 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6553 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6554 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6555 } 6556 } 6557 6558 // parsing end emitting has been merged to reduce code size 6559 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6560 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6561 6562 uint8_t * eir_data; 6563 ad_context_t context; 6564 const uint8_t * name; 6565 uint8_t name_len; 6566 6567 if (size < 3) return; 6568 6569 int event_type = hci_event_packet_get_type(packet); 6570 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6571 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6572 6573 switch (event_type){ 6574 case HCI_EVENT_INQUIRY_RESULT: 6575 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6576 if (size != (3 + (num_responses * 14))) return; 6577 break; 6578 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6579 if (size != 257) return; 6580 if (num_responses != 1) return; 6581 break; 6582 default: 6583 return; 6584 } 6585 6586 // event[1] is set at the end 6587 int i; 6588 for (i=0; i<num_responses;i++){ 6589 memset(event, 0, sizeof(event)); 6590 event[0] = GAP_EVENT_INQUIRY_RESULT; 6591 uint8_t event_size = 27; // if name is not set by EIR 6592 6593 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6594 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6595 (void)memcpy(&event[9], 6596 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6597 3); // class of device 6598 (void)memcpy(&event[12], 6599 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6600 2); // clock offset 6601 6602 switch (event_type){ 6603 case HCI_EVENT_INQUIRY_RESULT: 6604 // 14,15,16,17 = 0, size 18 6605 break; 6606 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6607 event[14] = 1; 6608 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6609 // 16,17 = 0, size 18 6610 break; 6611 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6612 event[14] = 1; 6613 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6614 // EIR packets only contain a single inquiry response 6615 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6616 name = NULL; 6617 // Iterate over EIR data 6618 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6619 uint8_t data_type = ad_iterator_get_data_type(&context); 6620 uint8_t data_size = ad_iterator_get_data_len(&context); 6621 const uint8_t * data = ad_iterator_get_data(&context); 6622 // Prefer Complete Local Name over Shortened Local Name 6623 switch (data_type){ 6624 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6625 if (name) continue; 6626 /* fall through */ 6627 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6628 name = data; 6629 name_len = data_size; 6630 break; 6631 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6632 if (data_size != 8) break; 6633 event[16] = 1; 6634 memcpy(&event[17], data, 8); 6635 break; 6636 default: 6637 break; 6638 } 6639 } 6640 if (name){ 6641 event[25] = 1; 6642 // truncate name if needed 6643 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6644 event[26] = len; 6645 (void)memcpy(&event[27], name, len); 6646 event_size += len; 6647 } 6648 break; 6649 default: 6650 return; 6651 } 6652 event[1] = event_size - 2; 6653 hci_emit_event(event, event_size, 1); 6654 } 6655 } 6656 #endif 6657 6658 void hci_emit_state(void){ 6659 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6660 uint8_t event[3]; 6661 event[0] = BTSTACK_EVENT_STATE; 6662 event[1] = sizeof(event) - 2u; 6663 event[2] = hci_stack->state; 6664 hci_emit_event(event, sizeof(event), 1); 6665 } 6666 6667 #ifdef ENABLE_CLASSIC 6668 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6669 uint8_t event[13]; 6670 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6671 event[1] = sizeof(event) - 2; 6672 event[2] = status; 6673 little_endian_store_16(event, 3, con_handle); 6674 reverse_bd_addr(address, &event[5]); 6675 event[11] = 1; // ACL connection 6676 event[12] = 0; // encryption disabled 6677 hci_emit_event(event, sizeof(event), 1); 6678 } 6679 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6680 if (disable_l2cap_timeouts) return; 6681 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6682 uint8_t event[4]; 6683 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6684 event[1] = sizeof(event) - 2; 6685 little_endian_store_16(event, 2, conn->con_handle); 6686 hci_emit_event(event, sizeof(event), 1); 6687 } 6688 #endif 6689 6690 #ifdef ENABLE_BLE 6691 #ifdef ENABLE_LE_CENTRAL 6692 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){ 6693 uint8_t event[21]; 6694 event[0] = HCI_EVENT_LE_META; 6695 event[1] = sizeof(event) - 2u; 6696 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6697 event[3] = status; 6698 little_endian_store_16(event, 4, con_handle); 6699 event[6] = 0; // TODO: role 6700 event[7] = address_type; 6701 reverse_bd_addr(address, &event[8]); 6702 little_endian_store_16(event, 14, 0); // interval 6703 little_endian_store_16(event, 16, 0); // latency 6704 little_endian_store_16(event, 18, 0); // supervision timeout 6705 event[20] = 0; // master clock accuracy 6706 hci_emit_event(event, sizeof(event), 1); 6707 } 6708 #endif 6709 #endif 6710 6711 static void hci_emit_transport_packet_sent(void){ 6712 // notify upper stack that it might be possible to send again 6713 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6714 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6715 } 6716 6717 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6718 uint8_t event[6]; 6719 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6720 event[1] = sizeof(event) - 2u; 6721 event[2] = 0; // status = OK 6722 little_endian_store_16(event, 3, con_handle); 6723 event[5] = reason; 6724 hci_emit_event(event, sizeof(event), 1); 6725 } 6726 6727 static void hci_emit_nr_connections_changed(void){ 6728 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6729 uint8_t event[3]; 6730 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6731 event[1] = sizeof(event) - 2u; 6732 event[2] = nr_hci_connections(); 6733 hci_emit_event(event, sizeof(event), 1); 6734 } 6735 6736 static void hci_emit_hci_open_failed(void){ 6737 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6738 uint8_t event[2]; 6739 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6740 event[1] = sizeof(event) - 2u; 6741 hci_emit_event(event, sizeof(event), 1); 6742 } 6743 6744 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6745 log_info("hci_emit_dedicated_bonding_result %u ", status); 6746 uint8_t event[9]; 6747 int pos = 0; 6748 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6749 event[pos++] = sizeof(event) - 2u; 6750 event[pos++] = status; 6751 reverse_bd_addr(address, &event[pos]); 6752 hci_emit_event(event, sizeof(event), 1); 6753 } 6754 6755 6756 #ifdef ENABLE_CLASSIC 6757 6758 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6759 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6760 uint8_t event[5]; 6761 int pos = 0; 6762 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6763 event[pos++] = sizeof(event) - 2; 6764 little_endian_store_16(event, 2, con_handle); 6765 pos += 2; 6766 event[pos++] = level; 6767 hci_emit_event(event, sizeof(event), 1); 6768 } 6769 6770 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6771 if (!connection) return LEVEL_0; 6772 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6773 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6774 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6775 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6776 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6777 // LEVEL 4 always requires 128 bit encrytion key size 6778 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6779 security_level = LEVEL_3; 6780 } 6781 return security_level; 6782 } 6783 6784 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6785 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6786 uint8_t event[3]; 6787 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6788 event[1] = sizeof(event) - 2; 6789 event[2] = enabled; 6790 hci_emit_event(event, sizeof(event), 1); 6791 } 6792 6793 // query if remote side supports eSCO 6794 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6795 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6796 if (!connection) return false; 6797 return (connection->remote_supported_features[0] & 1) != 0; 6798 } 6799 6800 static bool hci_ssp_supported(hci_connection_t * connection){ 6801 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6802 return (connection->bonding_flags & mask) == mask; 6803 } 6804 6805 // query if remote side supports SSP 6806 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6807 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6808 if (!connection) return false; 6809 return hci_ssp_supported(connection) ? 1 : 0; 6810 } 6811 6812 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6813 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6814 } 6815 6816 /** 6817 * Check if remote supported features query has completed 6818 */ 6819 bool hci_remote_features_available(hci_con_handle_t handle){ 6820 hci_connection_t * connection = hci_connection_for_handle(handle); 6821 if (!connection) return false; 6822 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6823 } 6824 6825 /** 6826 * Trigger remote supported features query 6827 */ 6828 6829 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6830 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6831 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6832 } 6833 } 6834 6835 void hci_remote_features_query(hci_con_handle_t con_handle){ 6836 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6837 if (!connection) return; 6838 hci_trigger_remote_features_for_connection(connection); 6839 hci_run(); 6840 } 6841 6842 // GAP API 6843 /** 6844 * @bbrief enable/disable bonding. default is enabled 6845 * @praram enabled 6846 */ 6847 void gap_set_bondable_mode(int enable){ 6848 hci_stack->bondable = enable ? 1 : 0; 6849 } 6850 /** 6851 * @brief Get bondable mode. 6852 * @return 1 if bondable 6853 */ 6854 int gap_get_bondable_mode(void){ 6855 return hci_stack->bondable; 6856 } 6857 6858 /** 6859 * @brief map link keys to security levels 6860 */ 6861 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6862 switch (link_key_type){ 6863 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6864 return LEVEL_4; 6865 case COMBINATION_KEY: 6866 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6867 return LEVEL_3; 6868 default: 6869 return LEVEL_2; 6870 } 6871 } 6872 6873 /** 6874 * @brief map link keys to secure connection yes/no 6875 */ 6876 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6877 switch (link_key_type){ 6878 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6879 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6880 return true; 6881 default: 6882 return false; 6883 } 6884 } 6885 6886 /** 6887 * @brief map link keys to authenticated 6888 */ 6889 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6890 switch (link_key_type){ 6891 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6892 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6893 return true; 6894 default: 6895 return false; 6896 } 6897 } 6898 6899 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6900 log_info("gap_mitm_protection_required_for_security_level %u", level); 6901 return level > LEVEL_2; 6902 } 6903 6904 /** 6905 * @brief get current security level 6906 */ 6907 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6908 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6909 if (!connection) return LEVEL_0; 6910 return gap_security_level_for_connection(connection); 6911 } 6912 6913 /** 6914 * @brief request connection to device to 6915 * @result GAP_AUTHENTICATION_RESULT 6916 */ 6917 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6918 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6919 if (!connection){ 6920 hci_emit_security_level(con_handle, LEVEL_0); 6921 return; 6922 } 6923 6924 btstack_assert(hci_is_le_connection(connection) == false); 6925 6926 // 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) 6927 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6928 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6929 requested_level = LEVEL_4; 6930 } 6931 6932 gap_security_level_t current_level = gap_security_level(con_handle); 6933 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6934 requested_level, connection->requested_security_level, current_level); 6935 6936 // authentication active if authentication request was sent or planned level > 0 6937 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6938 if (authentication_active){ 6939 // authentication already active 6940 if (connection->requested_security_level < requested_level){ 6941 // increase requested level as new level is higher 6942 // TODO: handle re-authentication when done 6943 connection->requested_security_level = requested_level; 6944 } 6945 } else { 6946 // no request active, notify if security sufficient 6947 if (requested_level <= current_level){ 6948 hci_emit_security_level(con_handle, current_level); 6949 return; 6950 } 6951 6952 // store request 6953 connection->requested_security_level = requested_level; 6954 6955 // request remote features if not already active 6956 hci_remote_features_query(con_handle); 6957 6958 // start to authenticate connection 6959 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6960 hci_run(); 6961 } 6962 } 6963 6964 /** 6965 * @brief start dedicated bonding with device. disconnect after bonding 6966 * @param device 6967 * @param request MITM protection 6968 * @result GAP_DEDICATED_BONDING_COMPLETE 6969 */ 6970 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6971 6972 // create connection state machine 6973 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6974 6975 if (!connection){ 6976 return BTSTACK_MEMORY_ALLOC_FAILED; 6977 } 6978 6979 // delete linkn key 6980 gap_drop_link_key_for_bd_addr(device); 6981 6982 // configure LEVEL_2/3, dedicated bonding 6983 connection->state = SEND_CREATE_CONNECTION; 6984 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6985 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6986 connection->bonding_flags = BONDING_DEDICATED; 6987 6988 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6989 6990 // handle: connnection failure (connection complete != ok) 6991 // handle: authentication failure 6992 // handle: disconnect on done 6993 6994 hci_run(); 6995 6996 return 0; 6997 } 6998 6999 void gap_set_local_name(const char * local_name){ 7000 hci_stack->local_name = local_name; 7001 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7002 // also update EIR if not set by user 7003 if (hci_stack->eir_data == NULL){ 7004 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7005 } 7006 hci_run(); 7007 } 7008 #endif 7009 7010 7011 #ifdef ENABLE_BLE 7012 7013 #ifdef ENABLE_LE_CENTRAL 7014 void gap_start_scan(void){ 7015 hci_stack->le_scanning_enabled = true; 7016 hci_run(); 7017 } 7018 7019 void gap_stop_scan(void){ 7020 hci_stack->le_scanning_enabled = false; 7021 hci_run(); 7022 } 7023 7024 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7025 hci_stack->le_scan_type = scan_type; 7026 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7027 hci_stack->le_scan_interval = scan_interval; 7028 hci_stack->le_scan_window = scan_window; 7029 hci_stack->le_scanning_param_update = true; 7030 hci_run(); 7031 } 7032 7033 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7034 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7035 } 7036 7037 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7038 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7039 if (!conn){ 7040 // disallow if le connection is already outgoing 7041 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7042 log_error("le connection already active"); 7043 return ERROR_CODE_COMMAND_DISALLOWED; 7044 } 7045 7046 log_info("gap_connect: no connection exists yet, creating context"); 7047 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7048 if (!conn){ 7049 // notify client that alloc failed 7050 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7051 log_info("gap_connect: failed to alloc hci_connection_t"); 7052 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7053 } 7054 7055 // set le connecting state 7056 if (hci_is_le_connection_type(addr_type)){ 7057 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7058 } 7059 7060 conn->state = SEND_CREATE_CONNECTION; 7061 log_info("gap_connect: send create connection next"); 7062 hci_run(); 7063 return ERROR_CODE_SUCCESS; 7064 } 7065 7066 if (!hci_is_le_connection(conn) || 7067 (conn->state == SEND_CREATE_CONNECTION) || 7068 (conn->state == SENT_CREATE_CONNECTION)) { 7069 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7070 log_error("gap_connect: classic connection or connect is already being created"); 7071 return GATT_CLIENT_IN_WRONG_STATE; 7072 } 7073 7074 // check if connection was just disconnected 7075 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7076 log_info("gap_connect: send create connection (again)"); 7077 conn->state = SEND_CREATE_CONNECTION; 7078 hci_run(); 7079 return ERROR_CODE_SUCCESS; 7080 } 7081 7082 log_info("gap_connect: context exists with state %u", conn->state); 7083 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7084 hci_run(); 7085 return ERROR_CODE_SUCCESS; 7086 } 7087 7088 // @assumption: only a single outgoing LE Connection exists 7089 static hci_connection_t * gap_get_outgoing_connection(void){ 7090 btstack_linked_item_t *it; 7091 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7092 hci_connection_t * conn = (hci_connection_t *) it; 7093 if (!hci_is_le_connection(conn)) continue; 7094 switch (conn->state){ 7095 case SEND_CREATE_CONNECTION: 7096 case SENT_CREATE_CONNECTION: 7097 case SENT_CANCEL_CONNECTION: 7098 return conn; 7099 default: 7100 break; 7101 }; 7102 } 7103 return NULL; 7104 } 7105 7106 uint8_t gap_connect_cancel(void){ 7107 hci_connection_t * conn = gap_get_outgoing_connection(); 7108 if (!conn) return 0; 7109 switch (conn->state){ 7110 case SEND_CREATE_CONNECTION: 7111 // skip sending create connection and emit event instead 7112 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7113 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7114 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7115 btstack_memory_hci_connection_free( conn ); 7116 break; 7117 case SENT_CREATE_CONNECTION: 7118 // request to send cancel connection 7119 conn->state = SEND_CANCEL_CONNECTION; 7120 hci_run(); 7121 break; 7122 default: 7123 break; 7124 } 7125 return 0; 7126 } 7127 7128 /** 7129 * @brief Set connection parameters for outgoing connections 7130 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7131 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7132 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7133 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7134 * @param conn_latency, default: 4 7135 * @param supervision_timeout (unit: 10ms), default: 720 ms 7136 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7137 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7138 */ 7139 7140 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7141 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7142 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7143 hci_stack->le_connection_scan_interval = conn_scan_interval; 7144 hci_stack->le_connection_scan_window = conn_scan_window; 7145 hci_stack->le_connection_interval_min = conn_interval_min; 7146 hci_stack->le_connection_interval_max = conn_interval_max; 7147 hci_stack->le_connection_latency = conn_latency; 7148 hci_stack->le_supervision_timeout = supervision_timeout; 7149 hci_stack->le_minimum_ce_length = min_ce_length; 7150 hci_stack->le_maximum_ce_length = max_ce_length; 7151 } 7152 #endif 7153 7154 /** 7155 * @brief Updates the connection parameters for a given LE connection 7156 * @param handle 7157 * @param conn_interval_min (unit: 1.25ms) 7158 * @param conn_interval_max (unit: 1.25ms) 7159 * @param conn_latency 7160 * @param supervision_timeout (unit: 10ms) 7161 * @return 0 if ok 7162 */ 7163 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7164 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7165 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7166 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7167 connection->le_conn_interval_min = conn_interval_min; 7168 connection->le_conn_interval_max = conn_interval_max; 7169 connection->le_conn_latency = conn_latency; 7170 connection->le_supervision_timeout = supervision_timeout; 7171 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7172 hci_run(); 7173 return 0; 7174 } 7175 7176 /** 7177 * @brief Request an update of the connection parameter for a given LE connection 7178 * @param handle 7179 * @param conn_interval_min (unit: 1.25ms) 7180 * @param conn_interval_max (unit: 1.25ms) 7181 * @param conn_latency 7182 * @param supervision_timeout (unit: 10ms) 7183 * @return 0 if ok 7184 */ 7185 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7186 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7187 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7188 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7189 connection->le_conn_interval_min = conn_interval_min; 7190 connection->le_conn_interval_max = conn_interval_max; 7191 connection->le_conn_latency = conn_latency; 7192 connection->le_supervision_timeout = supervision_timeout; 7193 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7194 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7195 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7196 return 0; 7197 } 7198 7199 #ifdef ENABLE_LE_PERIPHERAL 7200 7201 /** 7202 * @brief Set Advertisement Data 7203 * @param advertising_data_length 7204 * @param advertising_data (max 31 octets) 7205 * @note data is not copied, pointer has to stay valid 7206 */ 7207 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7208 hci_stack->le_advertisements_data_len = advertising_data_length; 7209 hci_stack->le_advertisements_data = advertising_data; 7210 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7211 hci_run(); 7212 } 7213 7214 /** 7215 * @brief Set Scan Response Data 7216 * @param advertising_data_length 7217 * @param advertising_data (max 31 octets) 7218 * @note data is not copied, pointer has to stay valid 7219 */ 7220 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7221 hci_stack->le_scan_response_data_len = scan_response_data_length; 7222 hci_stack->le_scan_response_data = scan_response_data; 7223 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7224 hci_run(); 7225 } 7226 7227 /** 7228 * @brief Set Advertisement Parameters 7229 * @param adv_int_min 7230 * @param adv_int_max 7231 * @param adv_type 7232 * @param direct_address_type 7233 * @param direct_address 7234 * @param channel_map 7235 * @param filter_policy 7236 * 7237 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7238 */ 7239 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7240 uint8_t direct_address_typ, bd_addr_t direct_address, 7241 uint8_t channel_map, uint8_t filter_policy) { 7242 7243 hci_stack->le_advertisements_interval_min = adv_int_min; 7244 hci_stack->le_advertisements_interval_max = adv_int_max; 7245 hci_stack->le_advertisements_type = adv_type; 7246 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7247 hci_stack->le_advertisements_channel_map = channel_map; 7248 hci_stack->le_advertisements_filter_policy = filter_policy; 7249 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7250 6); 7251 7252 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7253 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7254 hci_run(); 7255 } 7256 7257 /** 7258 * @brief Enable/Disable Advertisements 7259 * @param enabled 7260 */ 7261 void gap_advertisements_enable(int enabled){ 7262 if (enabled == 0){ 7263 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7264 } else { 7265 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 7266 } 7267 hci_update_advertisements_enabled_for_current_roles(); 7268 hci_run(); 7269 } 7270 7271 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7272 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 7273 btstack_linked_list_iterator_t it; 7274 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 7275 while (btstack_linked_list_iterator_has_next(&it)){ 7276 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 7277 if ( item->advertising_handle == advertising_handle ) { 7278 return item; 7279 } 7280 } 7281 return NULL; 7282 } 7283 7284 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 7285 // find free advertisement handle 7286 uint8_t advertisement_handle; 7287 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 7288 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 7289 } 7290 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 7291 // clear 7292 memset(storage, 0, sizeof(le_advertising_set_t)); 7293 // copy params 7294 storage->advertising_handle = advertisement_handle; 7295 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7296 // add to list 7297 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 7298 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7299 *out_advertising_handle = advertisement_handle; 7300 // set tasks and start 7301 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7302 hci_run(); 7303 return ERROR_CODE_SUCCESS; 7304 } 7305 7306 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 7307 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7308 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7309 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7310 // set tasks and start 7311 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7312 hci_run(); 7313 return ERROR_CODE_SUCCESS; 7314 } 7315 7316 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 7317 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7318 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7319 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 7320 return ERROR_CODE_SUCCESS; 7321 } 7322 7323 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 7324 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7325 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7326 memcpy(advertising_set->random_address, random_address, 6); 7327 // set tasks and start 7328 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7329 hci_run(); 7330 return ERROR_CODE_SUCCESS; 7331 } 7332 7333 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 7334 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7335 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7336 advertising_set->adv_data = advertising_data; 7337 advertising_set->adv_data_len = advertising_data_length; 7338 // set tasks and start 7339 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7340 hci_run(); 7341 return ERROR_CODE_SUCCESS; 7342 } 7343 7344 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){ 7345 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7346 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7347 advertising_set->scan_data = scan_response_data; 7348 advertising_set->scan_data_len = scan_response_data_length; 7349 // set tasks and start 7350 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7351 hci_run(); 7352 return ERROR_CODE_SUCCESS; 7353 } 7354 7355 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 7356 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7357 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7358 advertising_set->enable_timeout = timeout; 7359 advertising_set->enable_max_scan_events = num_extended_advertising_events; 7360 // set tasks and start 7361 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 7362 hci_run(); 7363 return ERROR_CODE_SUCCESS; 7364 } 7365 7366 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 7367 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7368 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7369 // set tasks and start 7370 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7371 hci_run(); 7372 return ERROR_CODE_SUCCESS; 7373 } 7374 7375 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7376 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7377 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7378 // set tasks and start 7379 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7380 hci_run(); 7381 return ERROR_CODE_SUCCESS; 7382 } 7383 7384 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7385 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 7386 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7387 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7388 // periodic advertising requires neither connectable, scannable, legacy or anonymous 7389 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7390 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 7391 // set tasks and start 7392 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 7393 hci_run(); 7394 return ERROR_CODE_SUCCESS; 7395 } 7396 7397 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 7398 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7399 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7400 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 7401 return ERROR_CODE_SUCCESS; 7402 } 7403 7404 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 7405 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7406 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7407 advertising_set->periodic_data = periodic_data; 7408 advertising_set->periodic_data_len = periodic_data_length; 7409 // set tasks and start 7410 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 7411 hci_run(); 7412 return ERROR_CODE_SUCCESS; 7413 } 7414 7415 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7416 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7417 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7418 // set tasks and start 7419 advertising_set->periodic_include_adi = include_adi; 7420 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7421 hci_run(); 7422 return ERROR_CODE_SUCCESS; 7423 } 7424 7425 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7426 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7427 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7428 // set tasks and start 7429 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7430 hci_run(); 7431 return ERROR_CODE_SUCCESS; 7432 } 7433 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 7434 7435 #endif 7436 7437 #endif 7438 7439 void hci_le_set_own_address_type(uint8_t own_address_type){ 7440 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7441 if (own_address_type == hci_stack->le_own_addr_type) return; 7442 hci_stack->le_own_addr_type = own_address_type; 7443 7444 #ifdef ENABLE_LE_PERIPHERAL 7445 // update advertisement parameters, too 7446 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7447 hci_run(); 7448 #endif 7449 #ifdef ENABLE_LE_CENTRAL 7450 // note: we don't update scan parameters or modify ongoing connection attempts 7451 #endif 7452 } 7453 7454 void hci_le_random_address_set(const bd_addr_t random_address){ 7455 memcpy(hci_stack->le_random_address, random_address, 6); 7456 hci_stack->le_random_address_set = true; 7457 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7458 hci_run(); 7459 } 7460 7461 #endif 7462 7463 uint8_t gap_disconnect(hci_con_handle_t handle){ 7464 hci_connection_t * conn = hci_connection_for_handle(handle); 7465 if (!conn){ 7466 hci_emit_disconnection_complete(handle, 0); 7467 return 0; 7468 } 7469 // ignore if already disconnected 7470 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7471 return 0; 7472 } 7473 conn->state = SEND_DISCONNECT; 7474 hci_run(); 7475 return 0; 7476 } 7477 7478 int gap_read_rssi(hci_con_handle_t con_handle){ 7479 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7480 if (hci_connection == NULL) return 0; 7481 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7482 hci_run(); 7483 return 1; 7484 } 7485 7486 /** 7487 * @brief Get connection type 7488 * @param con_handle 7489 * @result connection_type 7490 */ 7491 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7492 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7493 if (!conn) return GAP_CONNECTION_INVALID; 7494 switch (conn->address_type){ 7495 case BD_ADDR_TYPE_LE_PUBLIC: 7496 case BD_ADDR_TYPE_LE_RANDOM: 7497 return GAP_CONNECTION_LE; 7498 case BD_ADDR_TYPE_SCO: 7499 return GAP_CONNECTION_SCO; 7500 case BD_ADDR_TYPE_ACL: 7501 return GAP_CONNECTION_ACL; 7502 default: 7503 return GAP_CONNECTION_INVALID; 7504 } 7505 } 7506 7507 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7508 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7509 if (!conn) return HCI_ROLE_INVALID; 7510 return (hci_role_t) conn->role; 7511 } 7512 7513 7514 #ifdef ENABLE_CLASSIC 7515 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7516 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7517 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7518 conn->request_role = role; 7519 hci_run(); 7520 return ERROR_CODE_SUCCESS; 7521 } 7522 #endif 7523 7524 #ifdef ENABLE_BLE 7525 7526 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){ 7527 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7528 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7529 7530 conn->le_phy_update_all_phys = all_phys; 7531 conn->le_phy_update_tx_phys = tx_phys; 7532 conn->le_phy_update_rx_phys = rx_phys; 7533 conn->le_phy_update_phy_options = phy_options; 7534 7535 hci_run(); 7536 7537 return 0; 7538 } 7539 7540 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7541 // check if already in list 7542 btstack_linked_list_iterator_t it; 7543 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7544 while (btstack_linked_list_iterator_has_next(&it)) { 7545 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7546 if (entry->address_type != address_type) { 7547 continue; 7548 } 7549 if (memcmp(entry->address, address, 6) != 0) { 7550 continue; 7551 } 7552 // disallow if already scheduled to add 7553 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7554 return ERROR_CODE_COMMAND_DISALLOWED; 7555 } 7556 // still on controller, but scheduled to remove -> re-add 7557 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7558 return ERROR_CODE_SUCCESS; 7559 } 7560 // alloc and add to list 7561 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7562 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7563 entry->address_type = address_type; 7564 (void)memcpy(entry->address, address, 6); 7565 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7566 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7567 return ERROR_CODE_SUCCESS; 7568 } 7569 7570 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7571 btstack_linked_list_iterator_t it; 7572 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7573 while (btstack_linked_list_iterator_has_next(&it)){ 7574 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7575 if (entry->address_type != address_type) { 7576 continue; 7577 } 7578 if (memcmp(entry->address, address, 6) != 0) { 7579 continue; 7580 } 7581 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7582 // remove from controller if already present 7583 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7584 } else { 7585 // directly remove entry from whitelist 7586 btstack_linked_list_iterator_remove(&it); 7587 btstack_memory_whitelist_entry_free(entry); 7588 } 7589 return ERROR_CODE_SUCCESS; 7590 } 7591 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7592 } 7593 7594 static void hci_whitelist_clear(void){ 7595 btstack_linked_list_iterator_t it; 7596 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7597 while (btstack_linked_list_iterator_has_next(&it)){ 7598 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7599 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7600 // remove from controller if already present 7601 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7602 continue; 7603 } 7604 // directly remove entry from whitelist 7605 btstack_linked_list_iterator_remove(&it); 7606 btstack_memory_whitelist_entry_free(entry); 7607 } 7608 } 7609 7610 // free all entries unconditionally 7611 static void hci_whitelist_free(void){ 7612 btstack_linked_list_iterator_t lit; 7613 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7614 while (btstack_linked_list_iterator_has_next(&lit)){ 7615 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7616 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7617 btstack_memory_whitelist_entry_free(entry); 7618 } 7619 } 7620 7621 /** 7622 * @brief Clear Whitelist 7623 * @return 0 if ok 7624 */ 7625 uint8_t gap_whitelist_clear(void){ 7626 hci_whitelist_clear(); 7627 hci_run(); 7628 return ERROR_CODE_SUCCESS; 7629 } 7630 7631 /** 7632 * @brief Add Device to Whitelist 7633 * @param address_typ 7634 * @param address 7635 * @return 0 if ok 7636 */ 7637 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7638 uint8_t status = hci_whitelist_add(address_type, address); 7639 if (status){ 7640 return status; 7641 } 7642 hci_run(); 7643 return ERROR_CODE_SUCCESS; 7644 } 7645 7646 /** 7647 * @brief Remove Device from Whitelist 7648 * @param address_typ 7649 * @param address 7650 * @return 0 if ok 7651 */ 7652 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7653 uint8_t status = hci_whitelist_remove(address_type, address); 7654 if (status){ 7655 return status; 7656 } 7657 hci_run(); 7658 return ERROR_CODE_SUCCESS; 7659 } 7660 7661 #ifdef ENABLE_LE_CENTRAL 7662 /** 7663 * @brief Connect with Whitelist 7664 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7665 * @return - if ok 7666 */ 7667 uint8_t gap_connect_with_whitelist(void){ 7668 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7669 return ERROR_CODE_COMMAND_DISALLOWED; 7670 } 7671 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7672 hci_run(); 7673 return ERROR_CODE_SUCCESS; 7674 } 7675 7676 /** 7677 * @brief Auto Connection Establishment - Start Connecting to device 7678 * @param address_typ 7679 * @param address 7680 * @return 0 if ok 7681 */ 7682 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7683 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7684 return ERROR_CODE_COMMAND_DISALLOWED; 7685 } 7686 7687 uint8_t status = hci_whitelist_add(address_type, address); 7688 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7689 return status; 7690 } 7691 7692 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7693 7694 hci_run(); 7695 return ERROR_CODE_SUCCESS; 7696 } 7697 7698 /** 7699 * @brief Auto Connection Establishment - Stop Connecting to device 7700 * @param address_typ 7701 * @param address 7702 * @return 0 if ok 7703 */ 7704 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7705 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7706 return ERROR_CODE_COMMAND_DISALLOWED; 7707 } 7708 7709 hci_whitelist_remove(address_type, address); 7710 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7711 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7712 } 7713 hci_run(); 7714 return 0; 7715 } 7716 7717 /** 7718 * @brief Auto Connection Establishment - Stop everything 7719 * @note Convenience function to stop all active auto connection attempts 7720 */ 7721 uint8_t gap_auto_connection_stop_all(void){ 7722 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7723 return ERROR_CODE_COMMAND_DISALLOWED; 7724 } 7725 hci_whitelist_clear(); 7726 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7727 hci_run(); 7728 return ERROR_CODE_SUCCESS; 7729 } 7730 7731 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7732 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7733 if (!conn) return 0; 7734 return conn->le_connection_interval; 7735 } 7736 #endif 7737 #endif 7738 7739 #ifdef ENABLE_CLASSIC 7740 /** 7741 * @brief Set Extended Inquiry Response data 7742 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7743 * @note has to be done before stack starts up 7744 */ 7745 void gap_set_extended_inquiry_response(const uint8_t * data){ 7746 hci_stack->eir_data = data; 7747 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7748 hci_run(); 7749 } 7750 7751 /** 7752 * @brief Start GAP Classic Inquiry 7753 * @param duration in 1.28s units 7754 * @return 0 if ok 7755 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7756 */ 7757 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7758 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7759 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7760 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7761 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7762 } 7763 hci_stack->inquiry_state = duration_in_1280ms_units; 7764 hci_stack->inquiry_max_period_length = 0; 7765 hci_stack->inquiry_min_period_length = 0; 7766 hci_run(); 7767 return 0; 7768 } 7769 7770 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 7771 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7772 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7773 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7774 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7775 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7776 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7777 7778 hci_stack->inquiry_state = duration; 7779 hci_stack->inquiry_max_period_length = max_period_length; 7780 hci_stack->inquiry_min_period_length = min_period_length; 7781 hci_run(); 7782 return 0; 7783 } 7784 7785 /** 7786 * @brief Stop GAP Classic Inquiry 7787 * @return 0 if ok 7788 */ 7789 int gap_inquiry_stop(void){ 7790 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7791 // emit inquiry complete event, before it even started 7792 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7793 hci_emit_event(event, sizeof(event), 1); 7794 return 0; 7795 } 7796 switch (hci_stack->inquiry_state){ 7797 case GAP_INQUIRY_STATE_ACTIVE: 7798 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7799 hci_run(); 7800 return ERROR_CODE_SUCCESS; 7801 case GAP_INQUIRY_STATE_PERIODIC: 7802 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 7803 hci_run(); 7804 return ERROR_CODE_SUCCESS; 7805 default: 7806 return ERROR_CODE_COMMAND_DISALLOWED; 7807 } 7808 } 7809 7810 void gap_inquiry_set_lap(uint32_t lap){ 7811 hci_stack->inquiry_lap = lap; 7812 } 7813 7814 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7815 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7816 hci_stack->inquiry_scan_window = inquiry_scan_window; 7817 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7818 hci_run(); 7819 } 7820 7821 7822 /** 7823 * @brief Remote Name Request 7824 * @param addr 7825 * @param page_scan_repetition_mode 7826 * @param clock_offset only used when bit 15 is set 7827 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7828 */ 7829 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7830 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7831 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7832 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7833 hci_stack->remote_name_clock_offset = clock_offset; 7834 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7835 hci_run(); 7836 return 0; 7837 } 7838 7839 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7840 hci_stack->gap_pairing_state = state; 7841 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7842 hci_run(); 7843 return 0; 7844 } 7845 7846 /** 7847 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7848 * @param addr 7849 * @param pin_data 7850 * @param pin_len 7851 * @return 0 if ok 7852 */ 7853 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7854 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7855 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7856 hci_stack->gap_pairing_pin_len = pin_len; 7857 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7858 } 7859 7860 /** 7861 * @brief Legacy Pairing Pin Code Response 7862 * @param addr 7863 * @param pin 7864 * @return 0 if ok 7865 */ 7866 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7867 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7868 } 7869 7870 /** 7871 * @brief Abort Legacy Pairing 7872 * @param addr 7873 * @param pin 7874 * @return 0 if ok 7875 */ 7876 int gap_pin_code_negative(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_PIN_NEGATIVE); 7879 } 7880 7881 /** 7882 * @brief SSP Passkey Response 7883 * @param addr 7884 * @param passkey 7885 * @return 0 if ok 7886 */ 7887 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7888 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7889 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7890 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7891 } 7892 7893 /** 7894 * @brief Abort SSP Passkey Entry/Pairing 7895 * @param addr 7896 * @param pin 7897 * @return 0 if ok 7898 */ 7899 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7900 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7901 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7902 } 7903 7904 /** 7905 * @brief Accept SSP Numeric Comparison 7906 * @param addr 7907 * @param passkey 7908 * @return 0 if ok 7909 */ 7910 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7911 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7912 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7913 } 7914 7915 /** 7916 * @brief Abort SSP Numeric Comparison/Pairing 7917 * @param addr 7918 * @param pin 7919 * @return 0 if ok 7920 */ 7921 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7922 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7923 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7924 } 7925 7926 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7927 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7928 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7929 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7930 connectionSetAuthenticationFlags(conn, flag); 7931 hci_run(); 7932 return ERROR_CODE_SUCCESS; 7933 } 7934 #endif 7935 7936 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7937 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7938 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7939 } 7940 7941 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7942 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7943 } 7944 #endif 7945 7946 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7947 /** 7948 * @brief Report Remote OOB Data 7949 * @param bd_addr 7950 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7951 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7952 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7953 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7954 */ 7955 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){ 7956 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7957 if (connection == NULL) { 7958 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7959 } 7960 connection->classic_oob_c_192 = c_192; 7961 connection->classic_oob_r_192 = r_192; 7962 7963 // ignore P-256 if not supported by us 7964 if (hci_stack->secure_connections_active){ 7965 connection->classic_oob_c_256 = c_256; 7966 connection->classic_oob_r_256 = r_256; 7967 } 7968 7969 return ERROR_CODE_SUCCESS; 7970 } 7971 /** 7972 * @brief Generate new OOB data 7973 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7974 */ 7975 void gap_ssp_generate_oob_data(void){ 7976 hci_stack->classic_read_local_oob_data = true; 7977 hci_run(); 7978 } 7979 7980 #endif 7981 7982 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7983 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7984 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7985 if (connection == NULL) { 7986 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7987 } 7988 7989 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7990 connection->link_key_type = type; 7991 7992 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7993 } 7994 7995 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7996 /** 7997 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7998 * @param inquiry_mode see bluetooth_defines.h 7999 */ 8000 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8001 hci_stack->inquiry_mode = inquiry_mode; 8002 } 8003 8004 /** 8005 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8006 */ 8007 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8008 hci_stack->sco_voice_setting = voice_setting; 8009 } 8010 8011 /** 8012 * @brief Get SCO Voice Setting 8013 * @return current voice setting 8014 */ 8015 uint16_t hci_get_sco_voice_setting(void){ 8016 return hci_stack->sco_voice_setting; 8017 } 8018 8019 static int hci_have_usb_transport(void){ 8020 if (!hci_stack->hci_transport) return 0; 8021 const char * transport_name = hci_stack->hci_transport->name; 8022 if (!transport_name) return 0; 8023 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8024 } 8025 8026 /** @brief Get SCO packet length for current SCO Voice setting 8027 * @note Using SCO packets of the exact length is required for USB transfer 8028 * @return Length of SCO packets in bytes (not audio frames) 8029 */ 8030 uint16_t hci_get_sco_packet_length(void){ 8031 uint16_t sco_packet_length = 0; 8032 8033 #ifdef ENABLE_SCO_OVER_HCI 8034 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8035 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8036 8037 if (hci_have_usb_transport()){ 8038 // see Core Spec for H2 USB Transfer. 8039 // 3 byte SCO header + 24 bytes per connection 8040 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8041 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8042 } else { 8043 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8044 sco_packet_length = 3 + 60 * multiplier; 8045 // assert that it still fits inside an SCO buffer 8046 if (sco_packet_length > hci_stack->sco_data_packet_length){ 8047 sco_packet_length = 3 + 60; 8048 } 8049 } 8050 #endif 8051 8052 #ifdef HAVE_SCO_TRANSPORT 8053 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8054 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8055 sco_packet_length = 3 + 60 * multiplier; 8056 #endif 8057 return sco_packet_length; 8058 } 8059 8060 /** 8061 * @brief Sets the master/slave policy 8062 * @param policy (0: attempt to become master, 1: let connecting device decide) 8063 */ 8064 void hci_set_master_slave_policy(uint8_t policy){ 8065 hci_stack->master_slave_policy = policy; 8066 } 8067 8068 #endif 8069 8070 HCI_STATE hci_get_state(void){ 8071 return hci_stack->state; 8072 } 8073 8074 #ifdef ENABLE_CLASSIC 8075 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8076 hci_stack->gap_classic_accept_callback = accept_callback; 8077 } 8078 #endif 8079 8080 /** 8081 * @brief Set callback for Bluetooth Hardware Error 8082 */ 8083 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8084 hci_stack->hardware_error_callback = fn; 8085 } 8086 8087 void hci_disconnect_all(void){ 8088 btstack_linked_list_iterator_t it; 8089 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8090 while (btstack_linked_list_iterator_has_next(&it)){ 8091 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8092 if (con->state == SENT_DISCONNECT) continue; 8093 con->state = SEND_DISCONNECT; 8094 } 8095 hci_run(); 8096 } 8097 8098 uint16_t hci_get_manufacturer(void){ 8099 return hci_stack->manufacturer; 8100 } 8101 8102 #ifdef ENABLE_BLE 8103 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8104 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8105 if (!hci_con) return NULL; 8106 return &hci_con->sm_connection; 8107 } 8108 8109 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8110 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8111 #endif 8112 8113 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8114 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8115 if (hci_connection == NULL) return 0; 8116 if (hci_is_le_connection(hci_connection)){ 8117 #ifdef ENABLE_BLE 8118 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8119 if (sm_conn->sm_connection_encrypted) { 8120 return sm_conn->sm_actual_encryption_key_size; 8121 } 8122 #endif 8123 } else { 8124 #ifdef ENABLE_CLASSIC 8125 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8126 return hci_connection->encryption_key_size; 8127 } 8128 #endif 8129 } 8130 return 0; 8131 } 8132 8133 bool gap_authenticated(hci_con_handle_t con_handle){ 8134 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8135 if (hci_connection == NULL) return false; 8136 8137 switch (hci_connection->address_type){ 8138 #ifdef ENABLE_BLE 8139 case BD_ADDR_TYPE_LE_PUBLIC: 8140 case BD_ADDR_TYPE_LE_RANDOM: 8141 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8142 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8143 #endif 8144 #ifdef ENABLE_CLASSIC 8145 case BD_ADDR_TYPE_SCO: 8146 case BD_ADDR_TYPE_ACL: 8147 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8148 #endif 8149 default: 8150 return false; 8151 } 8152 } 8153 8154 bool gap_secure_connection(hci_con_handle_t con_handle){ 8155 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8156 if (hci_connection == NULL) return 0; 8157 8158 switch (hci_connection->address_type){ 8159 #ifdef ENABLE_BLE 8160 case BD_ADDR_TYPE_LE_PUBLIC: 8161 case BD_ADDR_TYPE_LE_RANDOM: 8162 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8163 return hci_connection->sm_connection.sm_connection_sc != 0; 8164 #endif 8165 #ifdef ENABLE_CLASSIC 8166 case BD_ADDR_TYPE_SCO: 8167 case BD_ADDR_TYPE_ACL: 8168 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8169 #endif 8170 default: 8171 return false; 8172 } 8173 } 8174 8175 bool gap_bonded(hci_con_handle_t con_handle){ 8176 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8177 if (hci_connection == NULL) return 0; 8178 8179 #ifdef ENABLE_CLASSIC 8180 link_key_t link_key; 8181 link_key_type_t link_key_type; 8182 #endif 8183 switch (hci_connection->address_type){ 8184 #ifdef ENABLE_BLE 8185 case BD_ADDR_TYPE_LE_PUBLIC: 8186 case BD_ADDR_TYPE_LE_RANDOM: 8187 return hci_connection->sm_connection.sm_le_db_index >= 0; 8188 #endif 8189 #ifdef ENABLE_CLASSIC 8190 case BD_ADDR_TYPE_SCO: 8191 case BD_ADDR_TYPE_ACL: 8192 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8193 #endif 8194 default: 8195 return false; 8196 } 8197 } 8198 8199 #ifdef ENABLE_BLE 8200 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8201 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8202 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8203 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8204 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8205 return sm_conn->sm_connection_authorization_state; 8206 } 8207 #endif 8208 8209 #ifdef ENABLE_CLASSIC 8210 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){ 8211 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8212 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8213 conn->sniff_min_interval = sniff_min_interval; 8214 conn->sniff_max_interval = sniff_max_interval; 8215 conn->sniff_attempt = sniff_attempt; 8216 conn->sniff_timeout = sniff_timeout; 8217 hci_run(); 8218 return 0; 8219 } 8220 8221 /** 8222 * @brief Exit Sniff mode 8223 * @param con_handle 8224 @ @return 0 if ok 8225 */ 8226 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8227 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8228 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8229 conn->sniff_min_interval = 0xffff; 8230 hci_run(); 8231 return 0; 8232 } 8233 8234 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){ 8235 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8236 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8237 conn->sniff_subrating_max_latency = max_latency; 8238 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8239 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8240 hci_run(); 8241 return ERROR_CODE_SUCCESS; 8242 } 8243 8244 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){ 8245 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8246 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8247 conn->qos_service_type = service_type; 8248 conn->qos_token_rate = token_rate; 8249 conn->qos_peak_bandwidth = peak_bandwidth; 8250 conn->qos_latency = latency; 8251 conn->qos_delay_variation = delay_variation; 8252 hci_run(); 8253 return ERROR_CODE_SUCCESS; 8254 } 8255 8256 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 8257 hci_stack->new_page_scan_interval = page_scan_interval; 8258 hci_stack->new_page_scan_window = page_scan_window; 8259 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 8260 hci_run(); 8261 } 8262 8263 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 8264 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 8265 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 8266 hci_run(); 8267 } 8268 8269 void gap_set_page_timeout(uint16_t page_timeout){ 8270 hci_stack->page_timeout = page_timeout; 8271 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 8272 hci_run(); 8273 } 8274 8275 #endif 8276 8277 void hci_halting_defer(void){ 8278 if (hci_stack->state != HCI_STATE_HALTING) return; 8279 switch (hci_stack->substate){ 8280 case HCI_HALTING_READY_FOR_CLOSE: 8281 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 8282 break; 8283 default: 8284 break; 8285 } 8286 } 8287 8288 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 8289 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 8290 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8291 if (le_device_db_index >= le_device_db_max_count()) return; 8292 uint8_t offset = le_device_db_index >> 3; 8293 uint8_t mask = 1 << (le_device_db_index & 7); 8294 hci_stack->le_resolving_list_add_entries[offset] |= mask; 8295 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8296 // note: go back to remove entries, otherwise, a remove + add will skip the add 8297 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8298 } 8299 } 8300 8301 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 8302 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8303 if (le_device_db_index >= le_device_db_max_count()) return; 8304 uint8_t offset = le_device_db_index >> 3; 8305 uint8_t mask = 1 << (le_device_db_index & 7); 8306 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 8307 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8308 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8309 } 8310 } 8311 8312 uint8_t gap_load_resolving_list_from_le_device_db(void){ 8313 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 8314 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 8315 } 8316 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 8317 // restart le resolving list update 8318 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 8319 } 8320 return ERROR_CODE_SUCCESS; 8321 } 8322 #endif 8323 8324 #ifdef ENABLE_BLE 8325 #ifdef ENABLE_LE_CENTRAL 8326 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8327 8328 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8329 // check if already in list 8330 btstack_linked_list_iterator_t it; 8331 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8332 while (btstack_linked_list_iterator_has_next(&it)) { 8333 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 8334 if (entry->sid != advertising_sid) { 8335 continue; 8336 } 8337 if (entry->address_type != address_type) { 8338 continue; 8339 } 8340 if (memcmp(entry->address, address, 6) != 0) { 8341 continue; 8342 } 8343 // disallow if already scheduled to add 8344 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 8345 return ERROR_CODE_COMMAND_DISALLOWED; 8346 } 8347 // still on controller, but scheduled to remove -> re-add 8348 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8349 return ERROR_CODE_SUCCESS; 8350 } 8351 // alloc and add to list 8352 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 8353 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8354 entry->sid = advertising_sid; 8355 entry->address_type = address_type; 8356 (void)memcpy(entry->address, address, 6); 8357 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8358 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 8359 return ERROR_CODE_SUCCESS; 8360 } 8361 8362 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8363 btstack_linked_list_iterator_t it; 8364 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8365 while (btstack_linked_list_iterator_has_next(&it)){ 8366 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8367 if (entry->sid != advertising_sid) { 8368 continue; 8369 } 8370 if (entry->address_type != address_type) { 8371 continue; 8372 } 8373 if (memcmp(entry->address, address, 6) != 0) { 8374 continue; 8375 } 8376 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8377 // remove from controller if already present 8378 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8379 } else { 8380 // directly remove entry from whitelist 8381 btstack_linked_list_iterator_remove(&it); 8382 btstack_memory_periodic_advertiser_list_entry_free(entry); 8383 } 8384 return ERROR_CODE_SUCCESS; 8385 } 8386 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8387 } 8388 8389 static void hci_periodic_advertiser_list_clear(void){ 8390 btstack_linked_list_iterator_t it; 8391 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8392 while (btstack_linked_list_iterator_has_next(&it)){ 8393 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8394 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8395 // remove from controller if already present 8396 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8397 continue; 8398 } 8399 // directly remove entry from whitelist 8400 btstack_linked_list_iterator_remove(&it); 8401 btstack_memory_periodic_advertiser_list_entry_free(entry); 8402 } 8403 } 8404 8405 // free all entries unconditionally 8406 static void hci_periodic_advertiser_list_free(void){ 8407 btstack_linked_list_iterator_t lit; 8408 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 8409 while (btstack_linked_list_iterator_has_next(&lit)){ 8410 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 8411 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 8412 btstack_memory_periodic_advertiser_list_entry_free(entry); 8413 } 8414 } 8415 8416 uint8_t gap_periodic_advertiser_list_clear(void){ 8417 hci_periodic_advertiser_list_clear(); 8418 hci_run(); 8419 return ERROR_CODE_SUCCESS; 8420 } 8421 8422 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8423 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 8424 if (status){ 8425 return status; 8426 } 8427 hci_run(); 8428 return ERROR_CODE_SUCCESS; 8429 } 8430 8431 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8432 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 8433 if (status){ 8434 return status; 8435 } 8436 hci_run(); 8437 return ERROR_CODE_SUCCESS; 8438 } 8439 8440 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 8441 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 8442 // abort if already active 8443 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 8444 return ERROR_CODE_COMMAND_DISALLOWED; 8445 } 8446 // store request 8447 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 8448 hci_stack->le_periodic_sync_options = options; 8449 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 8450 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 8451 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 8452 hci_stack->le_periodic_sync_skip = skip; 8453 hci_stack->le_periodic_sync_timeout = sync_timeout; 8454 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 8455 8456 hci_run(); 8457 return ERROR_CODE_SUCCESS; 8458 } 8459 8460 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 8461 // abort if not requested 8462 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 8463 return ERROR_CODE_COMMAND_DISALLOWED; 8464 } 8465 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 8466 hci_run(); 8467 return ERROR_CODE_SUCCESS; 8468 } 8469 8470 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 8471 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 8472 return ERROR_CODE_COMMAND_DISALLOWED; 8473 } 8474 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 8475 hci_run(); 8476 return ERROR_CODE_SUCCESS; 8477 } 8478 8479 #endif 8480 #endif 8481 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 8482 static uint8_t hci_iso_stream_create(hci_con_handle_t cis_handle){ 8483 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 8484 if (iso_stream == NULL){ 8485 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8486 } else { 8487 iso_stream->state = HCI_ISO_STREAM_STATE_REQUESTED; 8488 iso_stream->con_handle = cis_handle; 8489 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8490 return ERROR_CODE_SUCCESS; 8491 } 8492 } 8493 8494 static hci_iso_stream_t * hci_iso_stream_for_cis_handle(hci_con_handle_t cis_handle){ 8495 btstack_linked_list_iterator_t it; 8496 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8497 while (btstack_linked_list_iterator_has_next(&it)){ 8498 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8499 if ( iso_stream->con_handle == cis_handle ) { 8500 return iso_stream; 8501 } 8502 } 8503 return NULL; 8504 } 8505 8506 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 8507 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8508 btstack_memory_hci_iso_stream_free(iso_stream); 8509 } 8510 8511 static void hci_iso_stream_requested_finalize(void){ 8512 btstack_linked_list_iterator_t it; 8513 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8514 while (btstack_linked_list_iterator_has_next(&it)){ 8515 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8516 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8517 btstack_linked_list_iterator_remove(&it); 8518 btstack_memory_hci_iso_stream_free(iso_stream); 8519 } 8520 } 8521 } 8522 static void hci_iso_stream_requested_confirm(void){ 8523 btstack_linked_list_iterator_t it; 8524 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8525 while (btstack_linked_list_iterator_has_next(&it)){ 8526 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8527 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8528 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 8529 } 8530 } 8531 } 8532 8533 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 8534 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 8535 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 8536 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 8537 return (sdu_len_offset + 2 + sdu_len) == size; 8538 } 8539 8540 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 8541 if (hci_stack->iso_packet_handler == NULL) { 8542 return; 8543 } 8544 if (size < 4) { 8545 return; 8546 } 8547 8548 // parse header 8549 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 8550 uint16_t iso_data_len = little_endian_read_16(packet, 2); 8551 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 8552 hci_iso_stream_t * iso_stream = hci_iso_stream_for_cis_handle(cis_handle); 8553 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 8554 8555 // assert packet is complete 8556 if ((iso_data_len + 4u) != size){ 8557 return; 8558 } 8559 8560 if ((pb_flag & 0x01) == 0){ 8561 if (pb_flag == 0x02){ 8562 // The ISO_Data_Load field contains a header and a complete SDU. 8563 if (hci_iso_sdu_complete(packet, size)) { 8564 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 8565 } 8566 } else { 8567 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 8568 if (iso_stream == NULL){ 8569 return; 8570 } 8571 if (size > HCI_ISO_PAYLOAD_SIZE){ 8572 return; 8573 } 8574 memcpy(iso_stream->reassembly_buffer, packet, size); 8575 // fix pb_flag 8576 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 8577 iso_stream->reassembly_pos = size; 8578 } 8579 } else { 8580 // iso_data_load contains continuation or last fragment of an SDU 8581 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 8582 if (ts_flag != 0){ 8583 return; 8584 } 8585 // append fragment 8586 if (iso_stream == NULL){ 8587 return; 8588 } 8589 if (iso_stream->reassembly_pos == 0){ 8590 return; 8591 } 8592 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 8593 // reset reassembly buffer 8594 iso_stream->reassembly_pos = 0; 8595 return; 8596 } 8597 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 8598 iso_stream->reassembly_pos += iso_data_len; 8599 8600 // deliver if last fragment and SDU complete 8601 if (pb_flag == 0x03){ 8602 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 8603 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 8604 } 8605 iso_stream->reassembly_pos = 0; 8606 } 8607 } 8608 } 8609 8610 8611 #endif 8612 #endif /* ENABLE_BLE */ 8613 8614 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 8615 void hci_setup_test_connections_fuzz(void){ 8616 hci_connection_t * conn; 8617 8618 // default address: 66:55:44:33:00:01 8619 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 8620 8621 // setup Controller info 8622 hci_stack->num_cmd_packets = 255; 8623 hci_stack->acl_packets_total_num = 255; 8624 8625 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 8626 addr[5] = 0x01; 8627 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8628 conn->con_handle = addr[5]; 8629 conn->role = HCI_ROLE_SLAVE; 8630 conn->state = RECEIVED_CONNECTION_REQUEST; 8631 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8632 8633 // setup incoming Classic SCO connection with con handle 0x0002 8634 addr[5] = 0x02; 8635 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8636 conn->con_handle = addr[5]; 8637 conn->role = HCI_ROLE_SLAVE; 8638 conn->state = RECEIVED_CONNECTION_REQUEST; 8639 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8640 8641 // setup ready Classic ACL connection with con handle 0x0003 8642 addr[5] = 0x03; 8643 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8644 conn->con_handle = addr[5]; 8645 conn->role = HCI_ROLE_SLAVE; 8646 conn->state = OPEN; 8647 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8648 8649 // setup ready Classic SCO connection with con handle 0x0004 8650 addr[5] = 0x04; 8651 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8652 conn->con_handle = addr[5]; 8653 conn->role = HCI_ROLE_SLAVE; 8654 conn->state = OPEN; 8655 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8656 8657 // setup ready LE ACL connection with con handle 0x005 and public address 8658 addr[5] = 0x05; 8659 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 8660 conn->con_handle = addr[5]; 8661 conn->role = HCI_ROLE_SLAVE; 8662 conn->state = OPEN; 8663 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8664 conn->sm_connection.sm_connection_encrypted = 1; 8665 } 8666 8667 void hci_free_connections_fuzz(void){ 8668 btstack_linked_list_iterator_t it; 8669 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8670 while (btstack_linked_list_iterator_has_next(&it)){ 8671 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8672 btstack_linked_list_iterator_remove(&it); 8673 btstack_memory_hci_connection_free(con); 8674 } 8675 } 8676 void hci_simulate_working_fuzz(void){ 8677 hci_stack->le_scanning_param_update = false; 8678 hci_init_done(); 8679 hci_stack->num_cmd_packets = 255; 8680 } 8681 #endif 8682