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_scan_mode_changed(uint8_t discoverable, uint8_t connectable); 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 // On Bluettooth PTS dongle (BL 654) with PacketCraft HCI Firmware (LMP subversion) 0x5244, 1888 // setting Event Mask 2 causes Controller to drop Encryption Change events. 1889 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2) 1890 && (hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_PACKETCRAFT_INC)){ 1891 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1892 // Encryption Change Event v2 - bit 25 1893 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1894 break; 1895 } 1896 1897 #ifdef ENABLE_CLASSIC 1898 /* fall through */ 1899 1900 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1901 if (hci_classic_supported() && gap_ssp_supported()){ 1902 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1903 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1904 break; 1905 } 1906 1907 /* fall through */ 1908 1909 case HCI_INIT_WRITE_INQUIRY_MODE: 1910 if (hci_classic_supported()){ 1911 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1912 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1913 break; 1914 } 1915 1916 /* fall through */ 1917 1918 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1919 // skip write secure connections host support if not supported or disabled 1920 if (hci_classic_supported() && hci_stack->secure_connections_enable 1921 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1922 hci_stack->secure_connections_active = true; 1923 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1924 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1925 break; 1926 } 1927 1928 /* fall through */ 1929 1930 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1931 // skip set min encryption key size 1932 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1933 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1934 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1935 break; 1936 } 1937 1938 #ifdef ENABLE_SCO_OVER_HCI 1939 /* fall through */ 1940 1941 // only sent if ENABLE_SCO_OVER_HCI is defined 1942 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1943 // skip write synchronous flow control if not supported 1944 if (hci_classic_supported() 1945 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1946 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1947 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1948 break; 1949 } 1950 /* fall through */ 1951 1952 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1953 // skip write default erroneous data reporting if not supported 1954 if (hci_classic_supported() 1955 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1956 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1957 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1958 break; 1959 } 1960 #endif 1961 1962 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1963 /* fall through */ 1964 1965 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1966 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1967 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1968 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1969 #ifdef ENABLE_SCO_OVER_HCI 1970 log_info("BCM: Route SCO data via HCI transport"); 1971 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1972 #endif 1973 #ifdef ENABLE_SCO_OVER_PCM 1974 log_info("BCM: Route SCO data via PCM interface"); 1975 #ifdef ENABLE_BCM_PCM_WBS 1976 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1977 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1978 #else 1979 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1980 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1981 #endif 1982 #endif 1983 break; 1984 } 1985 #endif 1986 1987 #ifdef ENABLE_SCO_OVER_PCM 1988 /* fall through */ 1989 1990 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1991 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1992 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1993 log_info("BCM: Config PCM interface for I2S"); 1994 #ifdef ENABLE_BCM_PCM_WBS 1995 // 512 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, 2); 1997 #else 1998 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1999 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 2000 #endif 2001 break; 2002 } 2003 #endif 2004 #endif 2005 2006 #ifdef ENABLE_BLE 2007 /* fall through */ 2008 2009 // LE INIT 2010 case HCI_INIT_LE_READ_BUFFER_SIZE: 2011 if (hci_le_supported()){ 2012 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2013 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2014 hci_send_cmd(&hci_le_read_buffer_size_v2); 2015 } else { 2016 hci_send_cmd(&hci_le_read_buffer_size); 2017 } 2018 break; 2019 } 2020 2021 /* fall through */ 2022 2023 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2024 // skip write le host if not supported (e.g. on LE only EM9301) 2025 if (hci_le_supported() 2026 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2027 // LE Supported Host = 1, Simultaneous Host = 0 2028 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2029 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2030 break; 2031 } 2032 2033 /* fall through */ 2034 2035 case HCI_INIT_LE_SET_EVENT_MASK: 2036 if (hci_le_supported()){ 2037 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2038 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2039 break; 2040 } 2041 #endif 2042 2043 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2044 /* fall through */ 2045 2046 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2047 if (hci_le_supported() 2048 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2049 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2050 hci_send_cmd(&hci_le_read_maximum_data_length); 2051 break; 2052 } 2053 2054 /* fall through */ 2055 2056 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2057 if (hci_le_supported() 2058 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2059 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2060 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2061 break; 2062 } 2063 #endif 2064 2065 #ifdef ENABLE_LE_CENTRAL 2066 /* fall through */ 2067 2068 case HCI_INIT_READ_WHITE_LIST_SIZE: 2069 if (hci_le_supported()){ 2070 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2071 hci_send_cmd(&hci_le_read_white_list_size); 2072 break; 2073 } 2074 2075 #endif 2076 2077 #ifdef ENABLE_LE_PERIPHERAL 2078 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2079 /* fall through */ 2080 2081 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2082 if (hci_extended_advertising_supported()){ 2083 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2084 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2085 break; 2086 } 2087 #endif 2088 #endif 2089 /* fall through */ 2090 2091 case HCI_INIT_DONE: 2092 hci_stack->substate = HCI_INIT_DONE; 2093 // main init sequence complete 2094 #ifdef ENABLE_CLASSIC 2095 // check if initial Classic GAP Tasks are completed 2096 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2097 hci_run_gap_tasks_classic(); 2098 break; 2099 } 2100 #endif 2101 #ifdef ENABLE_BLE 2102 #ifdef ENABLE_LE_CENTRAL 2103 // check if initial LE GAP Tasks are completed 2104 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2105 hci_run_general_gap_le(); 2106 break; 2107 } 2108 #endif 2109 #endif 2110 hci_init_done(); 2111 break; 2112 2113 default: 2114 return; 2115 } 2116 } 2117 2118 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2119 bool command_completed = false; 2120 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2121 uint16_t opcode = little_endian_read_16(packet,3); 2122 if (opcode == hci_stack->last_cmd_opcode){ 2123 command_completed = true; 2124 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2125 } else { 2126 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2127 } 2128 } 2129 2130 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2131 uint8_t status = packet[2]; 2132 uint16_t opcode = little_endian_read_16(packet,4); 2133 if (opcode == hci_stack->last_cmd_opcode){ 2134 if (status){ 2135 command_completed = true; 2136 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2137 } else { 2138 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2139 } 2140 } else { 2141 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2142 } 2143 } 2144 #ifndef HAVE_HOST_CONTROLLER_API 2145 // Vendor == CSR 2146 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2147 // TODO: track actual command 2148 command_completed = true; 2149 } 2150 2151 // Vendor == Toshiba 2152 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2153 // TODO: track actual command 2154 command_completed = true; 2155 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2156 hci_stack->num_cmd_packets = 1; 2157 } 2158 #endif 2159 2160 return command_completed; 2161 } 2162 2163 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2164 2165 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2166 2167 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2168 2169 #ifndef HAVE_HOST_CONTROLLER_API 2170 2171 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2172 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2173 // 2174 // HCI Reset 2175 // Timeout 100 ms 2176 // HCI Reset 2177 // Command Complete Reset 2178 // HCI Read Local Version Information 2179 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2180 // hang... 2181 // 2182 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2183 if (!command_completed 2184 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2185 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2186 2187 uint16_t opcode = little_endian_read_16(packet,3); 2188 if (opcode == hci_reset.opcode){ 2189 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2190 return; 2191 } 2192 } 2193 2194 // CSR & H5 2195 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2196 if (!command_completed 2197 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2198 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2199 2200 uint16_t opcode = little_endian_read_16(packet,3); 2201 if (opcode == hci_reset.opcode){ 2202 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2203 return; 2204 } 2205 } 2206 2207 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2208 // fix: Correct substate and behave as command below 2209 if (command_completed){ 2210 switch (hci_stack->substate){ 2211 case HCI_INIT_SEND_RESET: 2212 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2213 break; 2214 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2215 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2216 break; 2217 default: 2218 break; 2219 } 2220 } 2221 2222 #endif 2223 2224 if (!command_completed) return; 2225 2226 bool need_baud_change = false; 2227 bool need_addr_change = false; 2228 2229 #ifndef HAVE_HOST_CONTROLLER_API 2230 need_baud_change = hci_stack->config 2231 && hci_stack->chipset 2232 && hci_stack->chipset->set_baudrate_command 2233 && hci_stack->hci_transport->set_baudrate 2234 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2235 2236 need_addr_change = hci_stack->custom_bd_addr_set 2237 && hci_stack->chipset 2238 && hci_stack->chipset->set_bd_addr_command; 2239 #endif 2240 2241 switch(hci_stack->substate){ 2242 2243 #ifndef HAVE_HOST_CONTROLLER_API 2244 case HCI_INIT_SEND_RESET: 2245 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2246 // fix: just correct substate and behave as command below 2247 2248 /* fall through */ 2249 #endif 2250 2251 case HCI_INIT_W4_SEND_RESET: 2252 btstack_run_loop_remove_timer(&hci_stack->timeout); 2253 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2254 return; 2255 2256 #ifndef HAVE_HOST_CONTROLLER_API 2257 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2258 // for STLC2500D, baud rate change already happened. 2259 // for others, baud rate gets changed now 2260 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2261 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2262 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2263 hci_stack->hci_transport->set_baudrate(baud_rate); 2264 } 2265 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2266 return; 2267 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2268 btstack_run_loop_remove_timer(&hci_stack->timeout); 2269 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2270 return; 2271 case HCI_INIT_W4_CUSTOM_INIT: 2272 // repeat custom init 2273 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2274 return; 2275 #endif 2276 2277 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2278 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2279 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2280 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2281 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2282 return; 2283 } 2284 if (need_addr_change){ 2285 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2286 return; 2287 } 2288 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2289 return; 2290 #ifndef HAVE_HOST_CONTROLLER_API 2291 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2292 if (need_baud_change){ 2293 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2294 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2295 hci_stack->hci_transport->set_baudrate(baud_rate); 2296 } 2297 if (need_addr_change){ 2298 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2299 return; 2300 } 2301 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2302 return; 2303 case HCI_INIT_W4_SET_BD_ADDR: 2304 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2305 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2306 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2307 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2308 return; 2309 } 2310 // skipping st warm boot 2311 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2312 return; 2313 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2314 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2315 return; 2316 #endif 2317 2318 case HCI_INIT_DONE: 2319 // set state if we came here by fall through 2320 hci_stack->substate = HCI_INIT_DONE; 2321 return; 2322 2323 default: 2324 break; 2325 } 2326 hci_initializing_next_state(); 2327 } 2328 2329 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2330 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2331 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2332 // check if we have been aware of the HCI connection 2333 switch (conn->state){ 2334 case SENT_CREATE_CONNECTION: 2335 case RECEIVED_CONNECTION_REQUEST: 2336 break; 2337 default: 2338 return; 2339 } 2340 2341 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2342 bd_addr_t bd_address; 2343 (void)memcpy(&bd_address, conn->address, 6); 2344 2345 #ifdef ENABLE_CLASSIC 2346 // cache needed data 2347 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2348 #endif 2349 2350 // connection failed, remove entry 2351 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2352 btstack_memory_hci_connection_free( conn ); 2353 2354 #ifdef ENABLE_CLASSIC 2355 // notify client if dedicated bonding 2356 if (notify_dedicated_bonding_failed){ 2357 log_info("hci notify_dedicated_bonding_failed"); 2358 hci_emit_dedicated_bonding_result(bd_address, status); 2359 } 2360 2361 // if authentication error, also delete link key 2362 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2363 gap_drop_link_key_for_bd_addr(bd_address); 2364 } 2365 #else 2366 UNUSED(status); 2367 #endif 2368 } 2369 2370 #ifdef ENABLE_CLASSIC 2371 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2372 // SSP Controller 2373 if (features[6] & (1 << 3)){ 2374 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2375 } 2376 // eSCO 2377 if (features[3] & (1<<7)){ 2378 conn->remote_supported_features[0] |= 1; 2379 } 2380 // Extended features 2381 if (features[7] & (1<<7)){ 2382 conn->remote_supported_features[0] |= 2; 2383 } 2384 } 2385 2386 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2387 // SSP Host 2388 if (features[0] & (1 << 0)){ 2389 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2390 } 2391 // SC Host 2392 if (features[0] & (1 << 3)){ 2393 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2394 } 2395 } 2396 2397 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2398 // SC Controller 2399 if (features[1] & (1 << 0)){ 2400 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2401 } 2402 } 2403 2404 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2405 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2406 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2407 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2408 if (conn->bonding_flags & BONDING_DEDICATED){ 2409 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2410 } 2411 } 2412 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2413 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2414 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2415 } 2416 2417 #endif 2418 2419 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2420 // handle BT initialization 2421 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2422 hci_initializing_event_handler(packet, size); 2423 } 2424 2425 // help with BT sleep 2426 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2427 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2428 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2429 && (hci_event_command_complete_get_command_opcode(packet) == HCI_OPCODE_HCI_WRITE_SCAN_ENABLE)){ 2430 hci_initializing_next_state(); 2431 } 2432 } 2433 2434 #ifdef ENABLE_CLASSIC 2435 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2436 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2437 conn->encryption_key_size = encryption_key_size; 2438 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2439 2440 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2441 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2442 conn->bonding_flags &= ~BONDING_DEDICATED; 2443 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2444 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2445 return; 2446 } 2447 2448 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2449 conn->requested_security_level = LEVEL_0; 2450 hci_emit_security_level(conn->con_handle, security_level); 2451 return; 2452 } 2453 2454 // Request remote features if not already done 2455 hci_trigger_remote_features_for_connection(conn); 2456 2457 // Request Authentication if not already done 2458 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2459 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2460 } 2461 #endif 2462 2463 static void hci_store_local_supported_commands(const uint8_t * packet){ 2464 // create mapping table 2465 #define X(name, offset, bit) { offset, bit }, 2466 static struct { 2467 uint8_t byte_offset; 2468 uint8_t bit_position; 2469 } supported_hci_commands_map [] = { 2470 SUPPORTED_HCI_COMMANDS 2471 }; 2472 #undef X 2473 2474 // create names for debug purposes 2475 #ifdef ENABLE_LOG_DEBUG 2476 #define X(name, offset, bit) #name, 2477 static const char * command_names[] = { 2478 SUPPORTED_HCI_COMMANDS 2479 }; 2480 #undef X 2481 #endif 2482 2483 hci_stack->local_supported_commands = 0; 2484 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2485 uint16_t i; 2486 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2487 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2488 #ifdef ENABLE_LOG_DEBUG 2489 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); 2490 #else 2491 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2492 #endif 2493 hci_stack->local_supported_commands |= (1LU << i); 2494 } 2495 } 2496 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2497 } 2498 2499 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2500 UNUSED(size); 2501 2502 uint16_t manufacturer; 2503 #ifdef ENABLE_CLASSIC 2504 hci_con_handle_t handle; 2505 hci_connection_t * conn; 2506 uint8_t status; 2507 #endif 2508 // get num cmd packets - limit to 1 to reduce complexity 2509 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2510 2511 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2512 switch (opcode){ 2513 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2514 if (packet[5]) break; 2515 // terminate, name 248 chars 2516 packet[6+248] = 0; 2517 log_info("local name: %s", &packet[6]); 2518 break; 2519 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2520 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2521 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2522 uint16_t acl_len = little_endian_read_16(packet, 6); 2523 uint16_t sco_len = packet[8]; 2524 2525 // determine usable ACL/SCO payload size 2526 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2527 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2528 2529 hci_stack->acl_packets_total_num = (uint8_t) little_endian_read_16(packet, 9); 2530 hci_stack->sco_packets_total_num = (uint8_t) little_endian_read_16(packet, 11); 2531 2532 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2533 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2534 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2535 } 2536 break; 2537 case HCI_OPCODE_HCI_READ_RSSI: 2538 if (packet[5] == ERROR_CODE_SUCCESS){ 2539 uint8_t event[5]; 2540 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2541 event[1] = 3; 2542 (void)memcpy(&event[2], &packet[6], 3); 2543 hci_emit_event(event, sizeof(event), 1); 2544 } 2545 break; 2546 #ifdef ENABLE_BLE 2547 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2548 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2549 hci_stack->le_iso_packets_total_num = packet[11]; 2550 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2551 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2552 2553 /* fall through */ 2554 2555 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2556 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2557 hci_stack->le_acl_packets_total_num = packet[8]; 2558 // determine usable ACL payload size 2559 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2560 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2561 } 2562 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); 2563 break; 2564 #endif 2565 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2566 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2567 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2568 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2569 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); 2570 break; 2571 #endif 2572 #ifdef ENABLE_LE_CENTRAL 2573 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2574 hci_stack->le_whitelist_capacity = packet[6]; 2575 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2576 break; 2577 #endif 2578 #ifdef ENABLE_LE_PERIPHERAL 2579 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2580 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2581 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2582 break; 2583 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2584 if (hci_stack->le_advertising_set_in_current_command != 0) { 2585 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2586 hci_stack->le_advertising_set_in_current_command = 0; 2587 if (advertising_set == NULL) break; 2588 uint8_t adv_status = packet[6]; 2589 uint8_t tx_power = packet[7]; 2590 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 }; 2591 if (adv_status == 0){ 2592 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2593 } 2594 hci_emit_event(event, sizeof(event), 1); 2595 } 2596 break; 2597 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2598 if (hci_stack->le_advertising_set_in_current_command != 0) { 2599 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2600 hci_stack->le_advertising_set_in_current_command = 0; 2601 if (advertising_set == NULL) break; 2602 uint8_t adv_status = packet[5]; 2603 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2604 if (adv_status == 0){ 2605 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2606 } 2607 hci_emit_event(event, sizeof(event), 1); 2608 } 2609 break; 2610 #endif 2611 #endif 2612 case HCI_OPCODE_HCI_READ_BD_ADDR: 2613 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2614 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)); 2615 #ifdef ENABLE_CLASSIC 2616 if (hci_stack->link_key_db){ 2617 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2618 } 2619 #endif 2620 break; 2621 #ifdef ENABLE_CLASSIC 2622 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2623 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 2624 break; 2625 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2626 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2627 if (status == ERROR_CODE_SUCCESS) { 2628 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2629 } else { 2630 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2631 } 2632 break; 2633 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2634 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2635 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2636 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2637 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2638 hci_emit_event(event, sizeof(event), 1); 2639 } 2640 break; 2641 #endif 2642 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2643 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2644 2645 #ifdef ENABLE_CLASSIC 2646 // determine usable ACL packet types based on host buffer size and supported features 2647 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2648 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2649 #endif 2650 // Classic/LE 2651 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2652 break; 2653 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2654 manufacturer = little_endian_read_16(packet, 10); 2655 // map Cypress to Broadcom 2656 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2657 log_info("Treat Cypress as Broadcom"); 2658 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2659 little_endian_store_16(packet, 10, manufacturer); 2660 } 2661 hci_stack->manufacturer = manufacturer; 2662 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2663 break; 2664 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2665 hci_store_local_supported_commands(packet); 2666 break; 2667 #ifdef ENABLE_CLASSIC 2668 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2669 if (packet[5]) return; 2670 hci_stack->synchronous_flow_control_enabled = 1; 2671 break; 2672 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2673 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2674 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2675 conn = hci_connection_for_handle(handle); 2676 if (conn != NULL) { 2677 uint8_t key_size = 0; 2678 if (status == 0){ 2679 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2680 log_info("Handle %04x key Size: %u", handle, key_size); 2681 } else { 2682 key_size = 1; 2683 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2684 } 2685 hci_handle_read_encryption_key_size_complete(conn, key_size); 2686 } 2687 break; 2688 // assert pairing complete event is emitted. 2689 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2690 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2691 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2692 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2693 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2694 // lookup connection by gap pairing addr 2695 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2696 if (conn == NULL) break; 2697 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2698 break; 2699 2700 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2701 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2702 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2703 uint8_t event[67]; 2704 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2705 event[1] = 65; 2706 (void)memset(&event[2], 0, 65); 2707 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2708 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2709 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2710 event[2] = 3; 2711 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2712 } else { 2713 event[2] = 1; 2714 } 2715 } 2716 hci_emit_event(event, sizeof(event), 0); 2717 break; 2718 } 2719 2720 // note: only needed if user does not provide OOB data 2721 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2722 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2723 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2724 if (conn == NULL) break; 2725 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2726 break; 2727 #endif 2728 #endif 2729 #ifdef ENABLE_BLE 2730 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2731 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2732 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2733 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2734 if (status != ERROR_CODE_SUCCESS){ 2735 hci_iso_stream_requested_finalize(); 2736 } 2737 break; 2738 #endif 2739 #endif 2740 default: 2741 break; 2742 } 2743 } 2744 2745 static void handle_command_status_event(uint8_t * packet, uint16_t size) { 2746 UNUSED(size); 2747 2748 // get num cmd packets - limit to 1 to reduce complexity 2749 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2750 2751 // get opcode and command status 2752 uint16_t opcode = hci_event_command_status_get_command_opcode(packet); 2753 2754 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) || defined(ENABLE_LE_ISOCHRONOUS_STREAMS) 2755 uint8_t status = hci_event_command_status_get_status(packet); 2756 #endif 2757 2758 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2759 bd_addr_type_t addr_type; 2760 #endif 2761 2762 switch (opcode){ 2763 #ifdef ENABLE_CLASSIC 2764 case HCI_OPCODE_HCI_CREATE_CONNECTION: 2765 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 2766 #endif 2767 #ifdef ENABLE_LE_CENTRAL 2768 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 2769 #endif 2770 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2771 addr_type = hci_stack->outgoing_addr_type; 2772 2773 // reset outgoing address info 2774 memset(hci_stack->outgoing_addr, 0, 6); 2775 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2776 2777 // on error 2778 if (status != ERROR_CODE_SUCCESS){ 2779 #ifdef ENABLE_LE_CENTRAL 2780 if (hci_is_le_connection_type(addr_type)){ 2781 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2782 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2783 } 2784 #endif 2785 // error => outgoing connection failed 2786 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2787 if (conn != NULL){ 2788 hci_handle_connection_failed(conn, status); 2789 } 2790 } 2791 break; 2792 #endif 2793 #ifdef ENABLE_CLASSIC 2794 case HCI_OPCODE_HCI_INQUIRY: 2795 if (status == ERROR_CODE_SUCCESS) { 2796 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2797 } else { 2798 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2799 } 2800 break; 2801 #endif 2802 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2803 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2804 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2805 if (status == ERROR_CODE_SUCCESS){ 2806 hci_iso_stream_requested_confirm(); 2807 } else { 2808 hci_iso_stream_requested_finalize(); 2809 } 2810 break; 2811 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 2812 default: 2813 break; 2814 } 2815 } 2816 2817 #ifdef ENABLE_BLE 2818 static void event_handle_le_connection_complete(const uint8_t * packet){ 2819 bd_addr_t addr; 2820 bd_addr_type_t addr_type; 2821 hci_connection_t * conn; 2822 2823 // Connection management 2824 reverse_bd_addr(&packet[8], addr); 2825 addr_type = (bd_addr_type_t)packet[7]; 2826 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2827 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2828 2829 #ifdef ENABLE_LE_CENTRAL 2830 // handle error: error is reported only to the initiator -> outgoing connection 2831 if (packet[3]){ 2832 2833 // handle cancelled outgoing connection 2834 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2835 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2836 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2837 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2838 // reset state 2839 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2840 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2841 // get outgoing connection conn struct for direct connect 2842 conn = gap_get_outgoing_connection(); 2843 } 2844 2845 // outgoing le connection establishment is done 2846 if (conn){ 2847 // remove entry 2848 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2849 btstack_memory_hci_connection_free( conn ); 2850 } 2851 return; 2852 } 2853 #endif 2854 2855 // on success, both hosts receive connection complete event 2856 if (packet[6] == HCI_ROLE_MASTER){ 2857 #ifdef ENABLE_LE_CENTRAL 2858 // if we're master on an le connection, it was an outgoing connection and we're done with it 2859 // note: no hci_connection_t object exists yet for connect with whitelist 2860 if (hci_is_le_connection_type(addr_type)){ 2861 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2862 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2863 } 2864 #endif 2865 } else { 2866 #ifdef ENABLE_LE_PERIPHERAL 2867 // if we're slave, it was an incoming connection, advertisements have stopped 2868 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2869 #endif 2870 } 2871 2872 // LE connections are auto-accepted, so just create a connection if there isn't one already 2873 if (!conn){ 2874 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2875 } 2876 2877 // no memory, sorry. 2878 if (!conn){ 2879 return; 2880 } 2881 2882 conn->state = OPEN; 2883 conn->role = packet[6]; 2884 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2885 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2886 2887 #ifdef ENABLE_LE_PERIPHERAL 2888 if (packet[6] == HCI_ROLE_SLAVE){ 2889 hci_update_advertisements_enabled_for_current_roles(); 2890 } 2891 #endif 2892 2893 // init unenhanced att bearer mtu 2894 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2895 conn->att_connection.mtu_exchanged = false; 2896 2897 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2898 2899 // restart timer 2900 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2901 // btstack_run_loop_add_timer(&conn->timeout); 2902 2903 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2904 2905 hci_emit_nr_connections_changed(); 2906 } 2907 #endif 2908 2909 #ifdef ENABLE_CLASSIC 2910 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){ 2911 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2912 // LEVEL_4 is tested by l2cap 2913 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2914 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2915 if (level >= LEVEL_3){ 2916 // MITM not possible without keyboard or display 2917 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2918 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2919 2920 // MITM possible if one side has keyboard and the other has keyboard or display 2921 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2922 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2923 2924 // MITM not possible if one side has only display and other side has no keyboard 2925 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2926 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2927 } 2928 // LEVEL 2 requires SSP, which is a given 2929 return true; 2930 } 2931 2932 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2933 uint16_t i; 2934 for (i=0; i < size ; i++){ 2935 if (data[i] != 0) { 2936 return false; 2937 } 2938 } 2939 return true; 2940 } 2941 2942 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2943 // get requested security level 2944 gap_security_level_t requested_security_level = conn->requested_security_level; 2945 if (hci_stack->gap_secure_connections_only_mode){ 2946 requested_security_level = LEVEL_4; 2947 } 2948 2949 // assess security: LEVEL 4 requires SC 2950 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2951 if ((requested_security_level == LEVEL_4) && 2952 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2953 !hci_remote_sc_enabled(conn)){ 2954 log_info("Level 4 required, but SC not supported -> abort"); 2955 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2956 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2957 return; 2958 } 2959 2960 // assess security based on io capabilities 2961 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2962 // responder: fully validate io caps of both sides as well as OOB data 2963 bool security_possible = false; 2964 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2965 2966 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2967 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2968 // so we merge the OOB data availability 2969 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2970 if (conn->classic_oob_c_192 != NULL){ 2971 have_oob_data |= 1; 2972 } 2973 if (conn->classic_oob_c_256 != NULL){ 2974 have_oob_data |= 2; 2975 } 2976 // for up to Level 3, either P-192 as well as P-256 will do 2977 // 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 2978 // if remote does not SC, we should not receive P-256 data either 2979 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2980 security_possible = true; 2981 } 2982 // for Level 4, P-256 is needed 2983 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2984 security_possible = true; 2985 } 2986 #endif 2987 2988 if (security_possible == false){ 2989 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2990 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2991 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2992 return; 2993 } 2994 } else { 2995 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2996 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2997 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2998 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2999 log_info("Level 3+ required, but no input/output -> abort"); 3000 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3001 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3002 return; 3003 } 3004 #endif 3005 #endif 3006 } 3007 3008 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3009 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 3010 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 3011 } else { 3012 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3013 } 3014 #endif 3015 } 3016 3017 #endif 3018 3019 static void event_handler(uint8_t *packet, uint16_t size){ 3020 3021 uint16_t event_length = packet[1]; 3022 3023 // assert packet is complete 3024 if (size != (event_length + 2u)){ 3025 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 3026 return; 3027 } 3028 3029 hci_con_handle_t handle; 3030 hci_connection_t * conn; 3031 int i; 3032 3033 #ifdef ENABLE_CLASSIC 3034 hci_link_type_t link_type; 3035 bd_addr_t addr; 3036 bd_addr_type_t addr_type; 3037 #endif 3038 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3039 hci_iso_stream_t * iso_stream; 3040 #endif 3041 3042 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 3043 3044 switch (hci_event_packet_get_type(packet)) { 3045 3046 case HCI_EVENT_COMMAND_COMPLETE: 3047 handle_command_complete_event(packet, size); 3048 break; 3049 3050 case HCI_EVENT_COMMAND_STATUS: 3051 handle_command_status_event(packet, size); 3052 break; 3053 3054 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3055 if (size < 3) return; 3056 uint16_t num_handles = packet[2]; 3057 if (size != (3u + num_handles * 4u)) return; 3058 uint16_t offset = 3; 3059 for (i=0; i<num_handles;i++){ 3060 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3061 offset += 2u; 3062 uint16_t num_packets = little_endian_read_16(packet, offset); 3063 offset += 2u; 3064 3065 conn = hci_connection_for_handle(handle); 3066 if (!conn){ 3067 log_error("hci_number_completed_packet lists unused con handle %u", handle); 3068 continue; 3069 } 3070 3071 if (conn->num_packets_sent >= num_packets){ 3072 conn->num_packets_sent -= num_packets; 3073 } else { 3074 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3075 conn->num_packets_sent = 0; 3076 } 3077 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3078 3079 #ifdef ENABLE_CLASSIC 3080 // For SCO, we do the can_send_now_check here 3081 hci_notify_if_sco_can_send_now(); 3082 #endif 3083 } 3084 break; 3085 } 3086 3087 #ifdef ENABLE_CLASSIC 3088 case HCI_EVENT_FLUSH_OCCURRED: 3089 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3090 handle = hci_event_flush_occurred_get_handle(packet); 3091 conn = hci_connection_for_handle(handle); 3092 if (conn) { 3093 log_info("Flush occurred, disconnect 0x%04x", handle); 3094 conn->state = SEND_DISCONNECT; 3095 } 3096 break; 3097 3098 case HCI_EVENT_INQUIRY_COMPLETE: 3099 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3100 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3101 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3102 hci_emit_event(event, sizeof(event), 1); 3103 } 3104 break; 3105 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3106 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3107 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3108 } 3109 break; 3110 case HCI_EVENT_CONNECTION_REQUEST: 3111 reverse_bd_addr(&packet[2], addr); 3112 link_type = (hci_link_type_t) packet[11]; 3113 3114 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3115 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3116 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3117 bd_addr_copy(hci_stack->decline_addr, addr); 3118 break; 3119 } 3120 3121 if (hci_stack->gap_classic_accept_callback != NULL){ 3122 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3123 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS; 3124 bd_addr_copy(hci_stack->decline_addr, addr); 3125 break; 3126 } 3127 } 3128 3129 // TODO: eval COD 8-10 3130 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3131 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3132 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3133 if (!conn) { 3134 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3135 } 3136 if (!conn) { 3137 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3138 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3139 bd_addr_copy(hci_stack->decline_addr, addr); 3140 hci_run(); 3141 // avoid event to higher layer 3142 return; 3143 } 3144 conn->role = HCI_ROLE_SLAVE; 3145 conn->state = RECEIVED_CONNECTION_REQUEST; 3146 // store info about eSCO 3147 if (link_type == HCI_LINK_TYPE_ESCO){ 3148 conn->remote_supported_features[0] |= 1; 3149 } 3150 hci_run(); 3151 break; 3152 3153 case HCI_EVENT_CONNECTION_COMPLETE: 3154 // Connection management 3155 reverse_bd_addr(&packet[5], addr); 3156 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3157 addr_type = BD_ADDR_TYPE_ACL; 3158 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3159 if (conn) { 3160 if (!packet[2]){ 3161 conn->state = OPEN; 3162 conn->con_handle = little_endian_read_16(packet, 3); 3163 3164 // trigger write supervision timeout if we're master 3165 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3166 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3167 } 3168 3169 // trigger write automatic flush timeout 3170 if (hci_stack->automatic_flush_timeout != 0){ 3171 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3172 } 3173 3174 // restart timer 3175 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3176 btstack_run_loop_add_timer(&conn->timeout); 3177 3178 // trigger remote features for dedicated bonding 3179 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3180 hci_trigger_remote_features_for_connection(conn); 3181 } 3182 3183 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3184 3185 hci_emit_nr_connections_changed(); 3186 } else { 3187 // connection failed 3188 hci_handle_connection_failed(conn, packet[2]); 3189 } 3190 } 3191 break; 3192 3193 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3194 reverse_bd_addr(&packet[5], addr); 3195 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3196 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3197 if (packet[2]){ 3198 // connection failed 3199 if (conn){ 3200 hci_handle_connection_failed(conn, packet[2]); 3201 } 3202 break; 3203 } 3204 if (!conn) { 3205 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3206 } 3207 if (!conn) { 3208 break; 3209 } 3210 conn->state = OPEN; 3211 conn->con_handle = little_endian_read_16(packet, 3); 3212 3213 #ifdef ENABLE_SCO_OVER_HCI 3214 // update SCO 3215 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3216 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3217 } 3218 // trigger can send now 3219 if (hci_have_usb_transport()){ 3220 hci_stack->sco_can_send_now = true; 3221 } 3222 #endif 3223 #ifdef HAVE_SCO_TRANSPORT 3224 // configure sco transport 3225 if (hci_stack->sco_transport != NULL){ 3226 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3227 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3228 } 3229 #endif 3230 break; 3231 3232 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3233 handle = little_endian_read_16(packet, 3); 3234 conn = hci_connection_for_handle(handle); 3235 if (!conn) break; 3236 if (!packet[2]){ 3237 const uint8_t * features = &packet[5]; 3238 hci_handle_remote_features_page_0(conn, features); 3239 3240 // read extended features if possible 3241 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3242 && ((conn->remote_supported_features[0] & 2) != 0)) { 3243 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3244 break; 3245 } 3246 } 3247 hci_handle_remote_features_received(conn); 3248 break; 3249 3250 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3251 handle = little_endian_read_16(packet, 3); 3252 conn = hci_connection_for_handle(handle); 3253 if (!conn) break; 3254 // status = ok, page = 1 3255 if (!packet[2]) { 3256 uint8_t page_number = packet[5]; 3257 uint8_t maximum_page_number = packet[6]; 3258 const uint8_t * features = &packet[7]; 3259 bool done = false; 3260 switch (page_number){ 3261 case 1: 3262 hci_handle_remote_features_page_1(conn, features); 3263 if (maximum_page_number >= 2){ 3264 // get Secure Connections (Controller) from Page 2 if available 3265 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3266 } else { 3267 // otherwise, assume SC (Controller) == SC (Host) 3268 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3269 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3270 } 3271 done = true; 3272 } 3273 break; 3274 case 2: 3275 hci_handle_remote_features_page_2(conn, features); 3276 done = true; 3277 break; 3278 default: 3279 break; 3280 } 3281 if (!done) break; 3282 } 3283 hci_handle_remote_features_received(conn); 3284 break; 3285 3286 case HCI_EVENT_LINK_KEY_REQUEST: 3287 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3288 hci_event_link_key_request_get_bd_addr(packet, addr); 3289 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3290 if (!conn) break; 3291 3292 // lookup link key in db if not cached 3293 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3294 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3295 } 3296 3297 // response sent by hci_run() 3298 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3299 #endif 3300 break; 3301 3302 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3303 hci_event_link_key_request_get_bd_addr(packet, addr); 3304 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3305 if (!conn) break; 3306 3307 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3308 3309 // CVE-2020-26555: ignore NULL link key 3310 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3311 if (btstack_is_null(&packet[8], 16)) break; 3312 3313 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3314 // Change Connection Encryption keeps link key type 3315 if (link_key_type != CHANGED_COMBINATION_KEY){ 3316 conn->link_key_type = link_key_type; 3317 } 3318 3319 // cache link key. link keys stored in little-endian format for legacy reasons 3320 memcpy(&conn->link_key, &packet[8], 16); 3321 3322 // only store link key: 3323 // - if bondable enabled 3324 if (hci_stack->bondable == false) break; 3325 // - if security level sufficient 3326 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3327 // - for SSP, also check if remote side requested bonding as well 3328 if (conn->link_key_type != COMBINATION_KEY){ 3329 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3330 if (!remote_bonding){ 3331 break; 3332 } 3333 } 3334 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3335 break; 3336 } 3337 3338 case HCI_EVENT_PIN_CODE_REQUEST: 3339 hci_event_pin_code_request_get_bd_addr(packet, addr); 3340 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3341 if (!conn) break; 3342 3343 hci_pairing_started(conn, false); 3344 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3345 if (!hci_stack->bondable ){ 3346 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3347 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3348 hci_run(); 3349 return; 3350 } 3351 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3352 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3353 log_info("Level 4 required, but SC not supported -> abort"); 3354 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3355 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3356 hci_run(); 3357 return; 3358 } 3359 break; 3360 3361 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3362 hci_event_io_capability_response_get_bd_addr(packet, addr); 3363 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3364 if (!conn) break; 3365 3366 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3367 hci_pairing_started(conn, true); 3368 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3369 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3370 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3371 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3372 #endif 3373 break; 3374 3375 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3376 hci_event_io_capability_response_get_bd_addr(packet, addr); 3377 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3378 if (!conn) break; 3379 3380 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3381 hci_connection_timestamp(conn); 3382 hci_pairing_started(conn, true); 3383 break; 3384 3385 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3386 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3387 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3388 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3389 if (!conn) break; 3390 3391 hci_connection_timestamp(conn); 3392 3393 hci_pairing_started(conn, true); 3394 3395 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3396 break; 3397 #endif 3398 3399 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3400 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3401 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3402 if (!conn) break; 3403 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3404 if (hci_stack->ssp_auto_accept){ 3405 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3406 }; 3407 } else { 3408 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3409 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3410 // don't forward event to app 3411 hci_run(); 3412 return; 3413 } 3414 break; 3415 3416 case HCI_EVENT_USER_PASSKEY_REQUEST: 3417 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3418 if (hci_stack->ssp_auto_accept){ 3419 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3420 }; 3421 break; 3422 3423 case HCI_EVENT_MODE_CHANGE: 3424 handle = hci_event_mode_change_get_handle(packet); 3425 conn = hci_connection_for_handle(handle); 3426 if (!conn) break; 3427 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3428 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3429 break; 3430 #endif 3431 3432 case HCI_EVENT_ENCRYPTION_CHANGE: 3433 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3434 handle = hci_event_encryption_change_get_connection_handle(packet); 3435 conn = hci_connection_for_handle(handle); 3436 if (!conn) break; 3437 if (hci_event_encryption_change_get_status(packet) == 0u) { 3438 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3439 if (encryption_enabled){ 3440 if (hci_is_le_connection(conn)){ 3441 // For LE, we accept connection as encrypted 3442 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3443 } 3444 #ifdef ENABLE_CLASSIC 3445 else { 3446 3447 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3448 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3449 bool connected_uses_aes_ccm = encryption_enabled == 2; 3450 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3451 log_info("SC during pairing, but only E0 now -> abort"); 3452 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3453 break; 3454 } 3455 3456 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3457 if (connected_uses_aes_ccm){ 3458 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3459 } 3460 3461 #ifdef ENABLE_TESTING_SUPPORT 3462 // work around for issue with PTS dongle 3463 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3464 #endif 3465 // validate encryption key size 3466 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3467 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3468 // already got encryption key size 3469 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3470 } else { 3471 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3472 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3473 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3474 } else { 3475 // if not, pretend everything is perfect 3476 hci_handle_read_encryption_key_size_complete(conn, 16); 3477 } 3478 } 3479 } 3480 #endif 3481 } else { 3482 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3483 } 3484 } else { 3485 uint8_t status = hci_event_encryption_change_get_status(packet); 3486 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3487 conn->bonding_flags &= ~BONDING_DEDICATED; 3488 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3489 conn->bonding_status = status; 3490 } 3491 } 3492 3493 break; 3494 3495 #ifdef ENABLE_CLASSIC 3496 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3497 handle = hci_event_authentication_complete_get_connection_handle(packet); 3498 conn = hci_connection_for_handle(handle); 3499 if (!conn) break; 3500 3501 // clear authentication active flag 3502 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3503 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3504 3505 // authenticated only if auth status == 0 3506 if (hci_event_authentication_complete_get_status(packet) == 0){ 3507 // authenticated 3508 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3509 3510 // If not already encrypted, start encryption 3511 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3512 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3513 break; 3514 } 3515 } 3516 3517 // emit updated security level 3518 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3519 break; 3520 3521 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3522 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3523 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3524 if (!conn) break; 3525 3526 // treat successfully paired connection as authenticated 3527 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3528 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3529 } 3530 3531 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3532 break; 3533 #endif 3534 3535 // HCI_EVENT_DISCONNECTION_COMPLETE 3536 // has been split, to first notify stack before shutting connection down 3537 // see end of function, too. 3538 case HCI_EVENT_DISCONNECTION_COMPLETE: 3539 if (packet[2]) break; // status != 0 3540 handle = little_endian_read_16(packet, 3); 3541 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3542 if (hci_stack->acl_fragmentation_total_size > 0u) { 3543 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3544 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3545 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3546 hci_stack->acl_fragmentation_total_size = 0; 3547 hci_stack->acl_fragmentation_pos = 0; 3548 if (release_buffer){ 3549 hci_release_packet_buffer(); 3550 } 3551 } 3552 } 3553 3554 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3555 // drop outgoing ISO fragments if it is for closed connection and release buffer if tx not active 3556 if (hci_stack->iso_fragmentation_total_size > 0u) { 3557 if (handle == READ_ISO_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3558 int release_buffer = hci_stack->iso_fragmentation_tx_active == 0u; 3559 log_info("drop fragmented ISO data for closed connection, release buffer %u", release_buffer); 3560 hci_stack->iso_fragmentation_total_size = 0; 3561 hci_stack->iso_fragmentation_pos = 0; 3562 if (release_buffer){ 3563 hci_release_packet_buffer(); 3564 } 3565 } 3566 } 3567 3568 // finalize iso stream if handle matches 3569 iso_stream = hci_iso_stream_for_cis_handle(handle); 3570 if (iso_stream != NULL){ 3571 hci_iso_stream_finalize(iso_stream); 3572 break; 3573 } 3574 #endif 3575 3576 conn = hci_connection_for_handle(handle); 3577 if (!conn) break; 3578 #ifdef ENABLE_CLASSIC 3579 // pairing failed if it was ongoing 3580 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3581 #endif 3582 3583 // emit dedicatd bonding event 3584 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3585 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3586 } 3587 3588 // mark connection for shutdown, stop timers, reset state 3589 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3590 hci_connection_stop_timer(conn); 3591 hci_connection_init(conn); 3592 3593 #ifdef ENABLE_BLE 3594 #ifdef ENABLE_LE_PERIPHERAL 3595 // re-enable advertisements for le connections if active 3596 if (hci_is_le_connection(conn)){ 3597 hci_update_advertisements_enabled_for_current_roles(); 3598 } 3599 #endif 3600 #endif 3601 break; 3602 3603 case HCI_EVENT_HARDWARE_ERROR: 3604 log_error("Hardware Error: 0x%02x", packet[2]); 3605 if (hci_stack->hardware_error_callback){ 3606 (*hci_stack->hardware_error_callback)(packet[2]); 3607 } else { 3608 // if no special requests, just reboot stack 3609 hci_power_control_off(); 3610 hci_power_control_on(); 3611 } 3612 break; 3613 3614 #ifdef ENABLE_CLASSIC 3615 case HCI_EVENT_ROLE_CHANGE: 3616 if (packet[2]) break; // status != 0 3617 reverse_bd_addr(&packet[3], addr); 3618 addr_type = BD_ADDR_TYPE_ACL; 3619 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3620 if (!conn) break; 3621 conn->role = packet[9]; 3622 break; 3623 #endif 3624 3625 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3626 // release packet buffer only for asynchronous transport and if there are not further fragments 3627 if (hci_transport_synchronous()) { 3628 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3629 return; // instead of break: to avoid re-entering hci_run() 3630 } 3631 hci_stack->acl_fragmentation_tx_active = 0; 3632 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3633 hci_stack->iso_fragmentation_tx_active = 0; 3634 if (hci_stack->iso_fragmentation_total_size) break; 3635 #endif 3636 if (hci_stack->acl_fragmentation_total_size) break; 3637 hci_release_packet_buffer(); 3638 3639 // L2CAP receives this event via the hci_emit_event below 3640 3641 #ifdef ENABLE_CLASSIC 3642 // For SCO, we do the can_send_now_check here 3643 hci_notify_if_sco_can_send_now(); 3644 #endif 3645 break; 3646 3647 #ifdef ENABLE_CLASSIC 3648 case HCI_EVENT_SCO_CAN_SEND_NOW: 3649 // For SCO, we do the can_send_now_check here 3650 hci_stack->sco_can_send_now = true; 3651 hci_notify_if_sco_can_send_now(); 3652 return; 3653 3654 // explode inquriy results for easier consumption 3655 case HCI_EVENT_INQUIRY_RESULT: 3656 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3657 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3658 gap_inquiry_explode(packet, size); 3659 break; 3660 #endif 3661 3662 #ifdef ENABLE_BLE 3663 case HCI_EVENT_LE_META: 3664 switch (packet[2]){ 3665 #ifdef ENABLE_LE_CENTRAL 3666 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3667 if (!hci_stack->le_scanning_enabled) break; 3668 le_handle_advertisement_report(packet, size); 3669 break; 3670 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3671 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3672 if (!hci_stack->le_scanning_enabled) break; 3673 le_handle_extended_advertisement_report(packet, size); 3674 break; 3675 #endif 3676 #endif 3677 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3678 event_handle_le_connection_complete(packet); 3679 break; 3680 3681 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3682 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3683 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3684 conn = hci_connection_for_handle(handle); 3685 if (!conn) break; 3686 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3687 break; 3688 3689 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3690 // connection 3691 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3692 conn = hci_connection_for_handle(handle); 3693 if (conn) { 3694 // read arguments 3695 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3696 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3697 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3698 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3699 3700 // validate against current connection parameter range 3701 le_connection_parameter_range_t existing_range; 3702 gap_get_connection_parameter_range(&existing_range); 3703 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3704 if (update_parameter){ 3705 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3706 conn->le_conn_interval_min = le_conn_interval_min; 3707 conn->le_conn_interval_max = le_conn_interval_max; 3708 conn->le_conn_latency = le_conn_latency; 3709 conn->le_supervision_timeout = le_supervision_timeout; 3710 } else { 3711 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3712 } 3713 } 3714 break; 3715 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3716 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3717 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3718 conn = hci_connection_for_handle(handle); 3719 if (conn) { 3720 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3721 } 3722 break; 3723 #endif 3724 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3725 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 3726 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 3727 iso_stream = hci_iso_stream_for_cis_handle(handle); 3728 if (iso_stream){ 3729 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 3730 if (status == ERROR_CODE_SUCCESS){ 3731 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3732 } else { 3733 hci_iso_stream_finalize(iso_stream); 3734 } 3735 } 3736 #endif 3737 default: 3738 break; 3739 } 3740 break; 3741 #endif 3742 case HCI_EVENT_VENDOR_SPECIFIC: 3743 // Vendor specific commands often create vendor specific event instead of num completed packets 3744 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3745 switch (hci_stack->manufacturer){ 3746 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3747 hci_stack->num_cmd_packets = 1; 3748 break; 3749 default: 3750 break; 3751 } 3752 break; 3753 default: 3754 break; 3755 } 3756 3757 handle_event_for_current_stack_state(packet, size); 3758 3759 // notify upper stack 3760 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3761 3762 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3763 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3764 handle = little_endian_read_16(packet, 3); 3765 hci_connection_t * aConn = hci_connection_for_handle(handle); 3766 // discard connection if app did not trigger a reconnect in the event handler 3767 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3768 hci_shutdown_connection(aConn); 3769 } 3770 } 3771 3772 // execute main loop 3773 hci_run(); 3774 } 3775 3776 #ifdef ENABLE_CLASSIC 3777 3778 #ifdef ENABLE_SCO_OVER_HCI 3779 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3780 static void sco_schedule_tx(hci_connection_t * conn); 3781 3782 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3783 log_debug("SCO TX Timeout"); 3784 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3785 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3786 if (!conn) return; 3787 3788 // trigger send 3789 conn->sco_tx_ready = 1; 3790 // extra packet if CVSD but SCO buffer is too short 3791 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3792 conn->sco_tx_ready++; 3793 } 3794 hci_notify_if_sco_can_send_now(); 3795 } 3796 3797 3798 #define SCO_TX_AFTER_RX_MS (6) 3799 3800 static void sco_schedule_tx(hci_connection_t * conn){ 3801 3802 uint32_t now = btstack_run_loop_get_time_ms(); 3803 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3804 int time_delta_ms = sco_tx_ms - now; 3805 3806 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3807 3808 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3809 btstack_run_loop_remove_timer(timer); 3810 btstack_run_loop_set_timer(timer, time_delta_ms); 3811 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3812 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3813 btstack_run_loop_add_timer(timer); 3814 } 3815 #endif 3816 3817 static void sco_handler(uint8_t * packet, uint16_t size){ 3818 // lookup connection struct 3819 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3820 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3821 if (!conn) return; 3822 3823 #ifdef ENABLE_SCO_OVER_HCI 3824 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3825 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3826 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3827 packet[2] = 0x3c; 3828 memmove(&packet[3], &packet[23], 63); 3829 size = 63; 3830 } 3831 } 3832 3833 if (hci_have_usb_transport()){ 3834 // Nothing to do 3835 } else { 3836 // 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); 3837 if (hci_stack->synchronous_flow_control_enabled == 0){ 3838 uint32_t now = btstack_run_loop_get_time_ms(); 3839 3840 if (!conn->sco_rx_valid){ 3841 // ignore first 10 packets 3842 conn->sco_rx_count++; 3843 // log_debug("sco rx count %u", conn->sco_rx_count); 3844 if (conn->sco_rx_count == 10) { 3845 // use first timestamp as is and pretent it just started 3846 conn->sco_rx_ms = now; 3847 conn->sco_rx_valid = 1; 3848 conn->sco_rx_count = 0; 3849 sco_schedule_tx(conn); 3850 } 3851 } else { 3852 // track expected arrival timme 3853 conn->sco_rx_count++; 3854 conn->sco_rx_ms += 7; 3855 int delta = (int32_t) (now - conn->sco_rx_ms); 3856 if (delta > 0){ 3857 conn->sco_rx_ms++; 3858 } 3859 // log_debug("sco rx %u", conn->sco_rx_ms); 3860 sco_schedule_tx(conn); 3861 } 3862 } 3863 } 3864 #endif 3865 3866 // deliver to app 3867 if (hci_stack->sco_packet_handler) { 3868 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3869 } 3870 3871 #ifdef HAVE_SCO_TRANSPORT 3872 // We can send one packet for each received packet 3873 conn->sco_tx_ready++; 3874 hci_notify_if_sco_can_send_now(); 3875 #endif 3876 3877 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3878 conn->num_packets_completed++; 3879 hci_stack->host_completed_packets = 1; 3880 hci_run(); 3881 #endif 3882 } 3883 #endif 3884 3885 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3886 hci_dump_packet(packet_type, 1, packet, size); 3887 switch (packet_type) { 3888 case HCI_EVENT_PACKET: 3889 event_handler(packet, size); 3890 break; 3891 case HCI_ACL_DATA_PACKET: 3892 acl_handler(packet, size); 3893 break; 3894 #ifdef ENABLE_CLASSIC 3895 case HCI_SCO_DATA_PACKET: 3896 sco_handler(packet, size); 3897 break; 3898 #endif 3899 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3900 case HCI_ISO_DATA_PACKET: 3901 hci_iso_packet_handler(packet, size); 3902 break; 3903 #endif 3904 default: 3905 break; 3906 } 3907 } 3908 3909 /** 3910 * @brief Add event packet handler. 3911 */ 3912 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3913 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3914 } 3915 3916 /** 3917 * @brief Remove event packet handler. 3918 */ 3919 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3920 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3921 } 3922 3923 /** Register HCI packet handlers */ 3924 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3925 hci_stack->acl_packet_handler = handler; 3926 } 3927 3928 #ifdef ENABLE_CLASSIC 3929 /** 3930 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3931 */ 3932 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3933 hci_stack->sco_packet_handler = handler; 3934 } 3935 #endif 3936 3937 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3938 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 3939 hci_stack->iso_packet_handler = handler; 3940 } 3941 #endif 3942 3943 static void hci_state_reset(void){ 3944 // no connections yet 3945 hci_stack->connections = NULL; 3946 3947 // keep discoverable/connectable as this has been requested by the client(s) 3948 // hci_stack->discoverable = 0; 3949 // hci_stack->connectable = 0; 3950 // hci_stack->bondable = 1; 3951 // hci_stack->own_addr_type = 0; 3952 3953 // buffer is free 3954 hci_stack->hci_packet_buffer_reserved = false; 3955 3956 // no pending cmds 3957 hci_stack->decline_reason = 0; 3958 3959 hci_stack->secure_connections_active = false; 3960 3961 #ifdef ENABLE_CLASSIC 3962 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3963 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3964 3965 hci_stack->gap_tasks_classic = 3966 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3967 GAP_TASK_SET_CLASS_OF_DEVICE | 3968 GAP_TASK_SET_LOCAL_NAME | 3969 GAP_TASK_SET_EIR_DATA | 3970 GAP_TASK_WRITE_SCAN_ENABLE | 3971 GAP_TASK_WRITE_PAGE_TIMEOUT; 3972 #endif 3973 3974 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3975 hci_stack->classic_read_local_oob_data = false; 3976 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3977 #endif 3978 3979 // LE 3980 #ifdef ENABLE_BLE 3981 memset(hci_stack->le_random_address, 0, 6); 3982 hci_stack->le_random_address_set = 0; 3983 #endif 3984 #ifdef ENABLE_LE_CENTRAL 3985 hci_stack->le_scanning_active = false; 3986 hci_stack->le_scanning_param_update = true; 3987 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3988 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3989 hci_stack->le_whitelist_capacity = 0; 3990 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3991 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 3992 #endif 3993 #endif 3994 #ifdef ENABLE_LE_PERIPHERAL 3995 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3996 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3997 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3998 } 3999 if (hci_stack->le_advertisements_data != NULL){ 4000 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4001 } 4002 #endif 4003 } 4004 4005 #ifdef ENABLE_CLASSIC 4006 /** 4007 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4008 */ 4009 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4010 // store and open remote device db 4011 hci_stack->link_key_db = link_key_db; 4012 if (hci_stack->link_key_db) { 4013 hci_stack->link_key_db->open(); 4014 } 4015 } 4016 #endif 4017 4018 void hci_init(const hci_transport_t *transport, const void *config){ 4019 4020 #ifdef HAVE_MALLOC 4021 if (!hci_stack) { 4022 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4023 } 4024 #else 4025 hci_stack = &hci_stack_static; 4026 #endif 4027 memset(hci_stack, 0, sizeof(hci_stack_t)); 4028 4029 // reference to use transport layer implementation 4030 hci_stack->hci_transport = transport; 4031 4032 // reference to used config 4033 hci_stack->config = config; 4034 4035 // setup pointer for outgoing packet buffer 4036 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4037 4038 // max acl payload size defined in config.h 4039 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4040 4041 // register packet handlers with transport 4042 transport->register_packet_handler(&packet_handler); 4043 4044 hci_stack->state = HCI_STATE_OFF; 4045 4046 // class of device 4047 hci_stack->class_of_device = 0x007a020c; // Smartphone 4048 4049 // bondable by default 4050 hci_stack->bondable = 1; 4051 4052 #ifdef ENABLE_CLASSIC 4053 // classic name 4054 hci_stack->local_name = default_classic_name; 4055 4056 // Master slave policy 4057 hci_stack->master_slave_policy = 1; 4058 4059 // Allow Role Switch 4060 hci_stack->allow_role_switch = 1; 4061 4062 // Default / minimum security level = 2 4063 hci_stack->gap_security_level = LEVEL_2; 4064 4065 // Default Security Mode 4 4066 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4067 4068 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4069 hci_stack->gap_required_encyrption_key_size = 7; 4070 4071 // Link Supervision Timeout 4072 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4073 4074 #endif 4075 4076 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4077 hci_stack->ssp_enable = 1; 4078 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4079 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4080 hci_stack->ssp_auto_accept = 1; 4081 4082 // Secure Connections: enable (requires support from Controller) 4083 hci_stack->secure_connections_enable = true; 4084 4085 // voice setting - signed 16 bit pcm data with CVSD over the air 4086 hci_stack->sco_voice_setting = 0x60; 4087 4088 #ifdef ENABLE_LE_CENTRAL 4089 // connection parameter to use for outgoing connections 4090 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4091 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4092 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4093 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4094 hci_stack->le_connection_latency = 4; // 4 4095 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4096 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4097 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4098 4099 // default LE Scanning 4100 hci_stack->le_scan_type = 0x1; // active 4101 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4102 hci_stack->le_scan_window = 0x30; // 30 ms 4103 #endif 4104 4105 #ifdef ENABLE_LE_PERIPHERAL 4106 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4107 #endif 4108 4109 // connection parameter range used to answer connection parameter update requests in l2cap 4110 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4111 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4112 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4113 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4114 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4115 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4116 4117 hci_state_reset(); 4118 } 4119 4120 void hci_deinit(void){ 4121 btstack_run_loop_remove_timer(&hci_stack->timeout); 4122 #ifdef HAVE_MALLOC 4123 if (hci_stack) { 4124 free(hci_stack); 4125 } 4126 #endif 4127 hci_stack = NULL; 4128 4129 #ifdef ENABLE_CLASSIC 4130 disable_l2cap_timeouts = 0; 4131 #endif 4132 } 4133 4134 /** 4135 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4136 */ 4137 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4138 hci_stack->chipset = chipset_driver; 4139 4140 // reset chipset driver - init is also called on power_up 4141 if (hci_stack->chipset && hci_stack->chipset->init){ 4142 hci_stack->chipset->init(hci_stack->config); 4143 } 4144 } 4145 4146 /** 4147 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4148 */ 4149 void hci_set_control(const btstack_control_t *hardware_control){ 4150 // references to used control implementation 4151 hci_stack->control = hardware_control; 4152 // init with transport config 4153 hardware_control->init(hci_stack->config); 4154 } 4155 4156 static void hci_discard_connections(void){ 4157 btstack_linked_list_iterator_t lit; 4158 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 4159 while (btstack_linked_list_iterator_has_next(&lit)){ 4160 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4161 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 4162 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4163 hci_shutdown_connection(connection); 4164 } 4165 } 4166 4167 void hci_close(void){ 4168 4169 #ifdef ENABLE_CLASSIC 4170 // close remote device db 4171 if (hci_stack->link_key_db) { 4172 hci_stack->link_key_db->close(); 4173 } 4174 #endif 4175 4176 hci_discard_connections(); 4177 4178 hci_power_control(HCI_POWER_OFF); 4179 4180 #ifdef HAVE_MALLOC 4181 free(hci_stack); 4182 #endif 4183 hci_stack = NULL; 4184 } 4185 4186 #ifdef HAVE_SCO_TRANSPORT 4187 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4188 hci_stack->sco_transport = sco_transport; 4189 sco_transport->register_packet_handler(&packet_handler); 4190 } 4191 #endif 4192 4193 #ifdef ENABLE_CLASSIC 4194 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4195 // validate ranage and set 4196 if (encryption_key_size < 7) return; 4197 if (encryption_key_size > 16) return; 4198 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4199 } 4200 4201 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4202 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4203 hci_stack->gap_security_mode = security_mode; 4204 return ERROR_CODE_SUCCESS; 4205 } else { 4206 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4207 } 4208 } 4209 4210 gap_security_mode_t gap_get_security_mode(void){ 4211 return hci_stack->gap_security_mode; 4212 } 4213 4214 void gap_set_security_level(gap_security_level_t security_level){ 4215 hci_stack->gap_security_level = security_level; 4216 } 4217 4218 gap_security_level_t gap_get_security_level(void){ 4219 if (hci_stack->gap_secure_connections_only_mode){ 4220 return LEVEL_4; 4221 } 4222 return hci_stack->gap_security_level; 4223 } 4224 4225 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4226 hci_stack->gap_minimal_service_security_level = security_level; 4227 } 4228 4229 void gap_set_secure_connections_only_mode(bool enable){ 4230 hci_stack->gap_secure_connections_only_mode = enable; 4231 } 4232 4233 bool gap_get_secure_connections_only_mode(void){ 4234 return hci_stack->gap_secure_connections_only_mode; 4235 } 4236 #endif 4237 4238 #ifdef ENABLE_CLASSIC 4239 void gap_set_class_of_device(uint32_t class_of_device){ 4240 hci_stack->class_of_device = class_of_device; 4241 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4242 hci_run(); 4243 } 4244 4245 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4246 hci_stack->default_link_policy_settings = default_link_policy_settings; 4247 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4248 hci_run(); 4249 } 4250 4251 void gap_set_allow_role_switch(bool allow_role_switch){ 4252 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4253 } 4254 4255 uint8_t hci_get_allow_role_switch(void){ 4256 return hci_stack->allow_role_switch; 4257 } 4258 4259 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4260 hci_stack->link_supervision_timeout = link_supervision_timeout; 4261 } 4262 4263 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4264 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4265 } 4266 4267 uint16_t hci_automatic_flush_timeout(void){ 4268 return hci_stack->automatic_flush_timeout; 4269 } 4270 4271 void hci_disable_l2cap_timeout_check(void){ 4272 disable_l2cap_timeouts = 1; 4273 } 4274 #endif 4275 4276 #ifndef HAVE_HOST_CONTROLLER_API 4277 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4278 void hci_set_bd_addr(bd_addr_t addr){ 4279 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4280 hci_stack->custom_bd_addr_set = 1; 4281 } 4282 #endif 4283 4284 // State-Module-Driver overview 4285 // state module low-level 4286 // HCI_STATE_OFF off close 4287 // HCI_STATE_INITIALIZING, on open 4288 // HCI_STATE_WORKING, on open 4289 // HCI_STATE_HALTING, on open 4290 // HCI_STATE_SLEEPING, off/sleep close 4291 // HCI_STATE_FALLING_ASLEEP on open 4292 4293 static int hci_power_control_on(void){ 4294 4295 // power on 4296 int err = 0; 4297 if (hci_stack->control && hci_stack->control->on){ 4298 err = (*hci_stack->control->on)(); 4299 } 4300 if (err){ 4301 log_error( "POWER_ON failed"); 4302 hci_emit_hci_open_failed(); 4303 return err; 4304 } 4305 4306 // int chipset driver 4307 if (hci_stack->chipset && hci_stack->chipset->init){ 4308 hci_stack->chipset->init(hci_stack->config); 4309 } 4310 4311 // init transport 4312 if (hci_stack->hci_transport->init){ 4313 hci_stack->hci_transport->init(hci_stack->config); 4314 } 4315 4316 // open transport 4317 err = hci_stack->hci_transport->open(); 4318 if (err){ 4319 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4320 if (hci_stack->control && hci_stack->control->off){ 4321 (*hci_stack->control->off)(); 4322 } 4323 hci_emit_hci_open_failed(); 4324 return err; 4325 } 4326 return 0; 4327 } 4328 4329 static void hci_power_control_off(void){ 4330 4331 log_info("hci_power_control_off"); 4332 4333 // close low-level device 4334 hci_stack->hci_transport->close(); 4335 4336 log_info("hci_power_control_off - hci_transport closed"); 4337 4338 // power off 4339 if (hci_stack->control && hci_stack->control->off){ 4340 (*hci_stack->control->off)(); 4341 } 4342 4343 log_info("hci_power_control_off - control closed"); 4344 4345 hci_stack->state = HCI_STATE_OFF; 4346 } 4347 4348 static void hci_power_control_sleep(void){ 4349 4350 log_info("hci_power_control_sleep"); 4351 4352 #if 0 4353 // don't close serial port during sleep 4354 4355 // close low-level device 4356 hci_stack->hci_transport->close(hci_stack->config); 4357 #endif 4358 4359 // sleep mode 4360 if (hci_stack->control && hci_stack->control->sleep){ 4361 (*hci_stack->control->sleep)(); 4362 } 4363 4364 hci_stack->state = HCI_STATE_SLEEPING; 4365 } 4366 4367 static int hci_power_control_wake(void){ 4368 4369 log_info("hci_power_control_wake"); 4370 4371 // wake on 4372 if (hci_stack->control && hci_stack->control->wake){ 4373 (*hci_stack->control->wake)(); 4374 } 4375 4376 #if 0 4377 // open low-level device 4378 int err = hci_stack->hci_transport->open(hci_stack->config); 4379 if (err){ 4380 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4381 if (hci_stack->control && hci_stack->control->off){ 4382 (*hci_stack->control->off)(); 4383 } 4384 hci_emit_hci_open_failed(); 4385 return err; 4386 } 4387 #endif 4388 4389 return 0; 4390 } 4391 4392 static void hci_power_enter_initializing_state(void){ 4393 // set up state machine 4394 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4395 hci_stack->hci_packet_buffer_reserved = false; 4396 hci_stack->state = HCI_STATE_INITIALIZING; 4397 hci_stack->substate = HCI_INIT_SEND_RESET; 4398 } 4399 4400 static void hci_power_enter_halting_state(void){ 4401 #ifdef ENABLE_BLE 4402 hci_whitelist_free(); 4403 #endif 4404 // see hci_run 4405 hci_stack->state = HCI_STATE_HALTING; 4406 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4407 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4408 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4409 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4410 btstack_run_loop_add_timer(&hci_stack->timeout); 4411 } 4412 4413 // returns error 4414 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4415 int err; 4416 switch (power_mode){ 4417 case HCI_POWER_ON: 4418 err = hci_power_control_on(); 4419 if (err != 0) { 4420 log_error("hci_power_control_on() error %d", err); 4421 return err; 4422 } 4423 hci_power_enter_initializing_state(); 4424 break; 4425 case HCI_POWER_OFF: 4426 // do nothing 4427 break; 4428 case HCI_POWER_SLEEP: 4429 // do nothing (with SLEEP == OFF) 4430 break; 4431 default: 4432 btstack_assert(false); 4433 break; 4434 } 4435 return ERROR_CODE_SUCCESS; 4436 } 4437 4438 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4439 switch (power_mode){ 4440 case HCI_POWER_ON: 4441 // do nothing 4442 break; 4443 case HCI_POWER_OFF: 4444 // no connections yet, just turn it off 4445 hci_power_control_off(); 4446 break; 4447 case HCI_POWER_SLEEP: 4448 // no connections yet, just turn it off 4449 hci_power_control_sleep(); 4450 break; 4451 default: 4452 btstack_assert(false); 4453 break; 4454 } 4455 return ERROR_CODE_SUCCESS; 4456 } 4457 4458 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4459 switch (power_mode){ 4460 case HCI_POWER_ON: 4461 // do nothing 4462 break; 4463 case HCI_POWER_OFF: 4464 hci_power_enter_halting_state(); 4465 break; 4466 case HCI_POWER_SLEEP: 4467 // see hci_run 4468 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4469 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4470 break; 4471 default: 4472 btstack_assert(false); 4473 break; 4474 } 4475 return ERROR_CODE_SUCCESS; 4476 } 4477 4478 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4479 switch (power_mode){ 4480 case HCI_POWER_ON: 4481 hci_power_enter_initializing_state(); 4482 break; 4483 case HCI_POWER_OFF: 4484 // do nothing 4485 break; 4486 case HCI_POWER_SLEEP: 4487 // see hci_run 4488 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4489 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4490 break; 4491 default: 4492 btstack_assert(false); 4493 break; 4494 } 4495 return ERROR_CODE_SUCCESS; 4496 } 4497 4498 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4499 switch (power_mode){ 4500 case HCI_POWER_ON: 4501 hci_power_enter_initializing_state(); 4502 break; 4503 case HCI_POWER_OFF: 4504 hci_power_enter_halting_state(); 4505 break; 4506 case HCI_POWER_SLEEP: 4507 // do nothing 4508 break; 4509 default: 4510 btstack_assert(false); 4511 break; 4512 } 4513 return ERROR_CODE_SUCCESS; 4514 } 4515 4516 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4517 int err; 4518 switch (power_mode){ 4519 case HCI_POWER_ON: 4520 err = hci_power_control_wake(); 4521 if (err) return err; 4522 hci_power_enter_initializing_state(); 4523 break; 4524 case HCI_POWER_OFF: 4525 hci_power_enter_halting_state(); 4526 break; 4527 case HCI_POWER_SLEEP: 4528 // do nothing 4529 break; 4530 default: 4531 btstack_assert(false); 4532 break; 4533 } 4534 return ERROR_CODE_SUCCESS; 4535 } 4536 4537 int hci_power_control(HCI_POWER_MODE power_mode){ 4538 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4539 int err = 0; 4540 switch (hci_stack->state){ 4541 case HCI_STATE_OFF: 4542 err = hci_power_control_state_off(power_mode); 4543 break; 4544 case HCI_STATE_INITIALIZING: 4545 err = hci_power_control_state_initializing(power_mode); 4546 break; 4547 case HCI_STATE_WORKING: 4548 err = hci_power_control_state_working(power_mode); 4549 break; 4550 case HCI_STATE_HALTING: 4551 err = hci_power_control_state_halting(power_mode); 4552 break; 4553 case HCI_STATE_FALLING_ASLEEP: 4554 err = hci_power_control_state_falling_asleep(power_mode); 4555 break; 4556 case HCI_STATE_SLEEPING: 4557 err = hci_power_control_state_sleeping(power_mode); 4558 break; 4559 default: 4560 btstack_assert(false); 4561 break; 4562 } 4563 if (err != 0){ 4564 return err; 4565 } 4566 4567 // create internal event 4568 hci_emit_state(); 4569 4570 // trigger next/first action 4571 hci_run(); 4572 4573 return 0; 4574 } 4575 4576 4577 static void hci_halting_run(void) { 4578 4579 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4580 4581 hci_connection_t *connection; 4582 #ifdef ENABLE_BLE 4583 #ifdef ENABLE_LE_PERIPHERAL 4584 bool stop_advertismenets; 4585 #endif 4586 #endif 4587 4588 switch (hci_stack->substate) { 4589 case HCI_HALTING_CLASSIC_STOP: 4590 #ifdef ENABLE_CLASSIC 4591 if (!hci_can_send_command_packet_now()) return; 4592 4593 if (hci_stack->connectable || hci_stack->discoverable){ 4594 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4595 hci_send_cmd(&hci_write_scan_enable, 0); 4596 return; 4597 } 4598 #endif 4599 /* fall through */ 4600 4601 case HCI_HALTING_LE_ADV_STOP: 4602 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4603 4604 #ifdef ENABLE_BLE 4605 #ifdef ENABLE_LE_PERIPHERAL 4606 if (!hci_can_send_command_packet_now()) return; 4607 4608 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4609 4610 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4611 if (hci_extended_advertising_supported()){ 4612 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4613 btstack_linked_list_iterator_t it; 4614 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4615 // stop all periodic advertisements and check if an extended set is active 4616 while (btstack_linked_list_iterator_has_next(&it)){ 4617 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4618 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4619 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4620 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4621 return; 4622 } 4623 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4624 stop_advertismenets = true; 4625 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4626 } 4627 } 4628 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 4629 if (stop_advertismenets){ 4630 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4631 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4632 return; 4633 } 4634 } 4635 else 4636 #else 4637 { 4638 if (stop_advertismenets) { 4639 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4640 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4641 return; 4642 } 4643 } 4644 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4645 #endif /* ENABLE_LE_PERIPHERAL */ 4646 #endif /* ENABLE_BLE */ 4647 4648 /* fall through */ 4649 4650 case HCI_HALTING_LE_SCAN_STOP: 4651 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4652 if (!hci_can_send_command_packet_now()) return; 4653 4654 #ifdef ENABLE_BLE 4655 #ifdef ENABLE_LE_CENTRAL 4656 if (hci_stack->le_scanning_active){ 4657 hci_le_scan_stop(); 4658 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4659 return; 4660 } 4661 #endif 4662 #endif 4663 4664 /* fall through */ 4665 4666 case HCI_HALTING_DISCONNECT_ALL: 4667 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4668 if (!hci_can_send_command_packet_now()) return; 4669 4670 // close all open connections 4671 connection = (hci_connection_t *) hci_stack->connections; 4672 if (connection) { 4673 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4674 4675 // check state 4676 if (connection->state == SENT_DISCONNECT) return; 4677 connection->state = SENT_DISCONNECT; 4678 4679 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4680 4681 // finally, send the disconnect command 4682 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4683 return; 4684 } 4685 4686 btstack_run_loop_remove_timer(&hci_stack->timeout); 4687 4688 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4689 log_info("HCI_STATE_HALTING: wait 50 ms"); 4690 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4691 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4692 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4693 btstack_run_loop_add_timer(&hci_stack->timeout); 4694 break; 4695 4696 case HCI_HALTING_CLOSE: 4697 // close left over connections (that had not been properly closed before) 4698 hci_discard_connections(); 4699 4700 log_info("HCI_STATE_HALTING, calling off"); 4701 4702 // switch mode 4703 hci_power_control_off(); 4704 4705 log_info("HCI_STATE_HALTING, emitting state"); 4706 hci_emit_state(); 4707 log_info("HCI_STATE_HALTING, done"); 4708 break; 4709 4710 case HCI_HALTING_W4_CLOSE_TIMER: 4711 // keep waiting 4712 4713 break; 4714 default: 4715 break; 4716 } 4717 }; 4718 4719 static void hci_falling_asleep_run(void){ 4720 hci_connection_t * connection; 4721 switch(hci_stack->substate) { 4722 case HCI_FALLING_ASLEEP_DISCONNECT: 4723 log_info("HCI_STATE_FALLING_ASLEEP"); 4724 // close all open connections 4725 connection = (hci_connection_t *) hci_stack->connections; 4726 if (connection){ 4727 4728 // send disconnect 4729 if (!hci_can_send_command_packet_now()) return; 4730 4731 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4732 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4733 4734 // send disconnected event right away - causes higher layer connections to get closed, too. 4735 hci_shutdown_connection(connection); 4736 return; 4737 } 4738 4739 if (hci_classic_supported()){ 4740 // disable page and inquiry scan 4741 if (!hci_can_send_command_packet_now()) return; 4742 4743 log_info("HCI_STATE_HALTING, disabling inq scans"); 4744 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4745 4746 // continue in next sub state 4747 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4748 break; 4749 } 4750 4751 /* fall through */ 4752 4753 case HCI_FALLING_ASLEEP_COMPLETE: 4754 log_info("HCI_STATE_HALTING, calling sleep"); 4755 // switch mode 4756 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4757 hci_emit_state(); 4758 break; 4759 4760 default: 4761 break; 4762 } 4763 } 4764 4765 #ifdef ENABLE_CLASSIC 4766 4767 static void hci_update_scan_enable(void){ 4768 // 2 = page scan, 1 = inq scan 4769 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4770 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4771 hci_run(); 4772 } 4773 4774 void gap_discoverable_control(uint8_t enable){ 4775 if (enable) enable = 1; // normalize argument 4776 4777 if (hci_stack->discoverable == enable){ 4778 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 4779 return; 4780 } 4781 4782 hci_stack->discoverable = enable; 4783 hci_update_scan_enable(); 4784 } 4785 4786 void gap_connectable_control(uint8_t enable){ 4787 if (enable) enable = 1; // normalize argument 4788 4789 // don't emit event 4790 if (hci_stack->connectable == enable) return; 4791 4792 hci_stack->connectable = enable; 4793 hci_update_scan_enable(); 4794 } 4795 #endif 4796 4797 void gap_local_bd_addr(bd_addr_t address_buffer){ 4798 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4799 } 4800 4801 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4802 static void hci_host_num_completed_packets(void){ 4803 4804 // create packet manually as arrays are not supported and num_commands should not get reduced 4805 hci_reserve_packet_buffer(); 4806 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4807 4808 uint16_t size = 0; 4809 uint16_t num_handles = 0; 4810 packet[size++] = 0x35; 4811 packet[size++] = 0x0c; 4812 size++; // skip param len 4813 size++; // skip num handles 4814 4815 // add { handle, packets } entries 4816 btstack_linked_item_t * it; 4817 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4818 hci_connection_t * connection = (hci_connection_t *) it; 4819 if (connection->num_packets_completed){ 4820 little_endian_store_16(packet, size, connection->con_handle); 4821 size += 2; 4822 little_endian_store_16(packet, size, connection->num_packets_completed); 4823 size += 2; 4824 // 4825 num_handles++; 4826 connection->num_packets_completed = 0; 4827 } 4828 } 4829 4830 packet[2] = size - 3; 4831 packet[3] = num_handles; 4832 4833 hci_stack->host_completed_packets = 0; 4834 4835 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4836 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4837 4838 // release packet buffer for synchronous transport implementations 4839 if (hci_transport_synchronous()){ 4840 hci_release_packet_buffer(); 4841 hci_emit_transport_packet_sent(); 4842 } 4843 } 4844 #endif 4845 4846 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4847 UNUSED(ds); 4848 hci_stack->substate = HCI_HALTING_CLOSE; 4849 // allow packet handlers to defer final shutdown 4850 hci_emit_state(); 4851 hci_run(); 4852 } 4853 4854 static bool hci_run_acl_fragments(void){ 4855 if (hci_stack->acl_fragmentation_total_size > 0u) { 4856 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4857 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4858 if (connection) { 4859 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4860 hci_send_acl_packet_fragments(connection); 4861 return true; 4862 } 4863 } else { 4864 // connection gone -> discard further fragments 4865 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4866 hci_stack->acl_fragmentation_total_size = 0; 4867 hci_stack->acl_fragmentation_pos = 0; 4868 } 4869 } 4870 return false; 4871 } 4872 4873 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4874 static bool hci_run_iso_fragments(void){ 4875 if (hci_stack->iso_fragmentation_total_size > 0u) { 4876 // TODO: flow control 4877 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 4878 hci_send_iso_packet_fragments(); 4879 return true; 4880 } 4881 } 4882 return false; 4883 } 4884 #endif 4885 4886 #ifdef ENABLE_CLASSIC 4887 4888 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4889 static bool hci_classic_operation_active(void) { 4890 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4891 return true; 4892 } 4893 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4894 return true; 4895 } 4896 btstack_linked_item_t * it; 4897 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4898 hci_connection_t *connection = (hci_connection_t *) it; 4899 switch (connection->state) { 4900 case SENT_CREATE_CONNECTION: 4901 case SENT_CANCEL_CONNECTION: 4902 case SENT_DISCONNECT: 4903 return true; 4904 default: 4905 break; 4906 } 4907 } 4908 return false; 4909 } 4910 #endif 4911 4912 static bool hci_run_general_gap_classic(void){ 4913 4914 // assert stack is working and classic is active 4915 if (hci_classic_supported() == false) return false; 4916 if (hci_stack->state != HCI_STATE_WORKING) return false; 4917 4918 // decline incoming connections 4919 if (hci_stack->decline_reason){ 4920 uint8_t reason = hci_stack->decline_reason; 4921 hci_stack->decline_reason = 0; 4922 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4923 return true; 4924 } 4925 4926 if (hci_stack->gap_tasks_classic != 0){ 4927 hci_run_gap_tasks_classic(); 4928 return true; 4929 } 4930 4931 // start/stop inquiry 4932 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4933 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4934 if (hci_classic_operation_active() == false) 4935 #endif 4936 { 4937 uint8_t duration = hci_stack->inquiry_state; 4938 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4939 if (hci_stack->inquiry_max_period_length != 0){ 4940 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); 4941 } else { 4942 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4943 } 4944 return true; 4945 } 4946 } 4947 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4948 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4949 hci_send_cmd(&hci_inquiry_cancel); 4950 return true; 4951 } 4952 4953 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 4954 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4955 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 4956 return true; 4957 } 4958 4959 // remote name request 4960 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4961 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4962 if (hci_classic_operation_active() == false) 4963 #endif 4964 { 4965 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4966 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4967 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4968 return true; 4969 } 4970 } 4971 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4972 // Local OOB data 4973 if (hci_stack->classic_read_local_oob_data){ 4974 hci_stack->classic_read_local_oob_data = false; 4975 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4976 hci_send_cmd(&hci_read_local_extended_oob_data); 4977 } else { 4978 hci_send_cmd(&hci_read_local_oob_data); 4979 } 4980 } 4981 #endif 4982 // pairing 4983 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4984 uint8_t state = hci_stack->gap_pairing_state; 4985 uint8_t pin_code[16]; 4986 switch (state){ 4987 case GAP_PAIRING_STATE_SEND_PIN: 4988 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4989 memset(pin_code, 0, 16); 4990 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4991 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4992 break; 4993 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4994 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4995 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4996 break; 4997 case GAP_PAIRING_STATE_SEND_PASSKEY: 4998 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4999 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 5000 break; 5001 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5002 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5003 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5004 break; 5005 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5006 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5007 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5008 break; 5009 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5010 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5011 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5012 break; 5013 default: 5014 break; 5015 } 5016 return true; 5017 } 5018 return false; 5019 } 5020 #endif 5021 5022 #ifdef ENABLE_BLE 5023 5024 #ifdef ENABLE_LE_CENTRAL 5025 static void hci_le_scan_stop(void){ 5026 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5027 if (hci_extended_advertising_supported()) { 5028 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5029 } else 5030 #endif 5031 { 5032 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5033 } 5034 } 5035 #endif 5036 5037 #ifdef ENABLE_LE_PERIPHERAL 5038 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5039 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5040 uint8_t operation = 0; 5041 if (pos == 0){ 5042 // first fragment or complete data 5043 operation |= 1; 5044 } 5045 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5046 // last fragment or complete data 5047 operation |= 2; 5048 } 5049 return operation; 5050 } 5051 #endif 5052 #endif 5053 5054 static bool hci_run_general_gap_le(void){ 5055 5056 btstack_linked_list_iterator_t lit; 5057 5058 // Phase 1: collect what to stop 5059 5060 #ifdef ENABLE_LE_CENTRAL 5061 bool scanning_stop = false; 5062 bool connecting_stop = false; 5063 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5064 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5065 bool periodic_sync_stop = false; 5066 #endif 5067 #endif 5068 #endif 5069 5070 #ifdef ENABLE_LE_PERIPHERAL 5071 bool advertising_stop = false; 5072 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5073 le_advertising_set_t * advertising_stop_set = NULL; 5074 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5075 bool periodic_advertising_stop = false; 5076 #endif 5077 #endif 5078 #endif 5079 5080 // check if own address changes 5081 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5082 5083 // check if whitelist needs modification 5084 bool whitelist_modification_pending = false; 5085 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5086 while (btstack_linked_list_iterator_has_next(&lit)){ 5087 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5088 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5089 whitelist_modification_pending = true; 5090 break; 5091 } 5092 } 5093 5094 // check if resolving list needs modification 5095 bool resolving_list_modification_pending = false; 5096 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5097 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5098 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5099 resolving_list_modification_pending = true; 5100 } 5101 #endif 5102 5103 #ifdef ENABLE_LE_CENTRAL 5104 5105 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5106 // check if periodic advertiser list needs modification 5107 bool periodic_list_modification_pending = false; 5108 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5109 while (btstack_linked_list_iterator_has_next(&lit)){ 5110 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5111 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5112 periodic_list_modification_pending = true; 5113 break; 5114 } 5115 } 5116 #endif 5117 5118 // scanning control 5119 if (hci_stack->le_scanning_active) { 5120 // stop if: 5121 // - parameter change required 5122 // - it's disabled 5123 // - whitelist change required but used for scanning 5124 // - resolving list modified 5125 // - own address changes 5126 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5127 if ((hci_stack->le_scanning_param_update) || 5128 !hci_stack->le_scanning_enabled || 5129 (scanning_uses_whitelist && whitelist_modification_pending) || 5130 resolving_list_modification_pending || 5131 random_address_change){ 5132 5133 scanning_stop = true; 5134 } 5135 } 5136 5137 // connecting control 5138 bool connecting_with_whitelist; 5139 switch (hci_stack->le_connecting_state){ 5140 case LE_CONNECTING_DIRECT: 5141 case LE_CONNECTING_WHITELIST: 5142 // stop connecting if: 5143 // - connecting uses white and whitelist modification pending 5144 // - if it got disabled 5145 // - resolving list modified 5146 // - own address changes 5147 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5148 if ((connecting_with_whitelist && whitelist_modification_pending) || 5149 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5150 resolving_list_modification_pending || 5151 random_address_change) { 5152 5153 connecting_stop = true; 5154 } 5155 break; 5156 default: 5157 break; 5158 } 5159 5160 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5161 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5162 // periodic sync control 5163 bool sync_with_advertiser_list; 5164 switch(hci_stack->le_periodic_sync_state){ 5165 case LE_CONNECTING_DIRECT: 5166 case LE_CONNECTING_WHITELIST: 5167 // stop sync if: 5168 // - sync with advertiser list and advertiser list modification pending 5169 // - if it got disabled 5170 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5171 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5172 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5173 periodic_sync_stop = true; 5174 } 5175 break; 5176 default: 5177 break; 5178 } 5179 #endif 5180 #endif 5181 5182 #endif /* ENABLE_LE_CENTRAL */ 5183 5184 #ifdef ENABLE_LE_PERIPHERAL 5185 // le advertisement control 5186 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5187 // stop if: 5188 // - parameter change required 5189 // - random address used in advertising and changes 5190 // - it's disabled 5191 // - whitelist change required but used for advertisement filter policy 5192 // - resolving list modified 5193 // - own address changes 5194 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5195 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5196 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5197 if (advertising_change || 5198 (advertising_uses_random_address && random_address_change) || 5199 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5200 (advertising_uses_whitelist && whitelist_modification_pending) || 5201 resolving_list_modification_pending || 5202 random_address_change) { 5203 5204 advertising_stop = true; 5205 } 5206 } 5207 5208 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5209 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5210 btstack_linked_list_iterator_t it; 5211 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5212 while (btstack_linked_list_iterator_has_next(&it)){ 5213 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5214 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5215 // stop if: 5216 // - parameter change required 5217 // - random address used in connectable advertising and changes 5218 // - it's disabled 5219 // - whitelist change required but used for advertisement filter policy 5220 // - resolving list modified 5221 // - own address changes 5222 // - advertisement set will be removed 5223 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5224 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5225 bool advertising_uses_random_address = 5226 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5227 advertising_connectable; 5228 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5229 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5230 bool advertising_set_random_address_change = 5231 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5232 bool advertising_set_will_be_removed = 5233 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5234 if (advertising_parameter_change || 5235 (advertising_uses_random_address && advertising_set_random_address_change) || 5236 (advertising_enabled == false) || 5237 (advertising_uses_whitelist && whitelist_modification_pending) || 5238 resolving_list_modification_pending || 5239 advertising_set_will_be_removed) { 5240 5241 advertising_stop = true; 5242 advertising_stop_set = advertising_set; 5243 break; 5244 } 5245 } 5246 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5247 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5248 // stop if: 5249 // - it's disabled 5250 // - parameter change required 5251 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5252 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5253 if ((periodic_enabled == false) || periodic_parameter_change){ 5254 periodic_advertising_stop = true; 5255 advertising_stop_set = advertising_set; 5256 } 5257 } 5258 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5259 } 5260 } 5261 #endif 5262 5263 #endif 5264 5265 5266 // Phase 2: stop everything that should be off during modifications 5267 5268 5269 // 2.1 Outgoing connection 5270 #ifdef ENABLE_LE_CENTRAL 5271 if (connecting_stop){ 5272 hci_send_cmd(&hci_le_create_connection_cancel); 5273 return true; 5274 } 5275 #endif 5276 5277 // 2.2 Scanning 5278 #ifdef ENABLE_LE_CENTRAL 5279 if (scanning_stop){ 5280 hci_stack->le_scanning_active = false; 5281 hci_le_scan_stop(); 5282 return true; 5283 } 5284 5285 // 2.3 Periodic Sync 5286 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5287 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5288 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5289 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5290 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5291 return true; 5292 } 5293 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5294 if (periodic_sync_stop){ 5295 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5296 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5297 return true; 5298 } 5299 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5300 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5301 #endif /* ENABLE_LE_CENTRAL */ 5302 5303 // 2.4 Advertising: legacy, extended, periodic 5304 #ifdef ENABLE_LE_PERIPHERAL 5305 if (advertising_stop){ 5306 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5307 if (hci_extended_advertising_supported()) { 5308 uint8_t advertising_stop_handle; 5309 if (advertising_stop_set != NULL){ 5310 advertising_stop_handle = advertising_stop_set->advertising_handle; 5311 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5312 } else { 5313 advertising_stop_handle = 0; 5314 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5315 } 5316 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5317 const uint16_t durations[] = { 0 }; 5318 const uint16_t max_events[] = { 0 }; 5319 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5320 } else 5321 #endif 5322 { 5323 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5324 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5325 } 5326 return true; 5327 } 5328 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5329 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5330 if (periodic_advertising_stop){ 5331 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5332 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5333 return true; 5334 } 5335 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5336 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5337 #endif /* ENABLE_LE_PERIPHERAL */ 5338 5339 5340 // Phase 3: modify 5341 5342 if (random_address_change){ 5343 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5344 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5345 if (hci_extended_advertising_supported()) { 5346 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5347 } 5348 #endif 5349 { 5350 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5351 } 5352 return true; 5353 } 5354 5355 #ifdef ENABLE_LE_CENTRAL 5356 if (hci_stack->le_scanning_param_update){ 5357 hci_stack->le_scanning_param_update = false; 5358 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5359 if (hci_extended_advertising_supported()){ 5360 // prepare arrays for all PHYs 5361 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5362 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5363 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5364 uint8_t scanning_phys = 1; // LE 1M PHY 5365 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5366 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5367 } else 5368 #endif 5369 { 5370 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5371 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5372 } 5373 return true; 5374 } 5375 #endif 5376 5377 #ifdef ENABLE_LE_PERIPHERAL 5378 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5379 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5380 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5381 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5382 if (hci_extended_advertising_supported()){ 5383 // map advertisment type to advertising event properties 5384 uint16_t adv_event_properties = 0; 5385 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5386 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5387 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5388 } 5389 hci_stack->le_advertising_set_in_current_command = 0; 5390 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5391 0, 5392 adv_event_properties, 5393 hci_stack->le_advertisements_interval_min, 5394 hci_stack->le_advertisements_interval_max, 5395 hci_stack->le_advertisements_channel_map, 5396 hci_stack->le_advertisements_own_addr_type, 5397 hci_stack->le_advertisements_direct_address_type, 5398 hci_stack->le_advertisements_direct_address, 5399 hci_stack->le_advertisements_filter_policy, 5400 0x7f, // tx power: no preference 5401 0x01, // primary adv phy: LE 1M 5402 0, // secondary adv max skip 5403 0, // secondary adv phy 5404 0, // adv sid 5405 0 // scan request notification 5406 ); 5407 } 5408 #endif 5409 { 5410 hci_send_cmd(&hci_le_set_advertising_parameters, 5411 hci_stack->le_advertisements_interval_min, 5412 hci_stack->le_advertisements_interval_max, 5413 hci_stack->le_advertisements_type, 5414 hci_stack->le_advertisements_own_addr_type, 5415 hci_stack->le_advertisements_direct_address_type, 5416 hci_stack->le_advertisements_direct_address, 5417 hci_stack->le_advertisements_channel_map, 5418 hci_stack->le_advertisements_filter_policy); 5419 } 5420 return true; 5421 } 5422 5423 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5424 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5425 uint8_t adv_data_clean[31]; 5426 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5427 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5428 hci_stack->le_advertisements_data_len); 5429 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5430 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5431 if (hci_extended_advertising_supported()){ 5432 hci_stack->le_advertising_set_in_current_command = 0; 5433 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5434 } else 5435 #endif 5436 { 5437 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5438 } 5439 return true; 5440 } 5441 5442 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5443 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5444 uint8_t scan_data_clean[31]; 5445 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5446 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5447 hci_stack->le_scan_response_data_len); 5448 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5449 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5450 if (hci_extended_advertising_supported()){ 5451 hci_stack->le_advertising_set_in_current_command = 0; 5452 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5453 } else 5454 #endif 5455 { 5456 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5457 } 5458 return true; 5459 } 5460 5461 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5462 if (hci_extended_advertising_supported()) { 5463 btstack_linked_list_iterator_t it; 5464 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5465 while (btstack_linked_list_iterator_has_next(&it)){ 5466 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5467 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5468 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5469 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5470 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5471 return true; 5472 } 5473 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5474 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5475 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5476 return true; 5477 } 5478 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5479 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5480 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5481 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5482 advertising_set->advertising_handle, 5483 advertising_set->extended_params.advertising_event_properties, 5484 advertising_set->extended_params.primary_advertising_interval_min, 5485 advertising_set->extended_params.primary_advertising_interval_max, 5486 advertising_set->extended_params.primary_advertising_channel_map, 5487 advertising_set->extended_params.own_address_type, 5488 advertising_set->extended_params.peer_address_type, 5489 advertising_set->extended_params.peer_address, 5490 advertising_set->extended_params.advertising_filter_policy, 5491 advertising_set->extended_params.advertising_tx_power, 5492 advertising_set->extended_params.primary_advertising_phy, 5493 advertising_set->extended_params.secondary_advertising_max_skip, 5494 advertising_set->extended_params.secondary_advertising_phy, 5495 advertising_set->extended_params.advertising_sid, 5496 advertising_set->extended_params.scan_request_notification_enable 5497 ); 5498 return true; 5499 } 5500 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5501 uint16_t pos = advertising_set->adv_data_pos; 5502 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5503 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5504 if ((operation & 0x02) != 0){ 5505 // last fragment or complete data 5506 operation |= 2; 5507 advertising_set->adv_data_pos = 0; 5508 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5509 } else { 5510 advertising_set->adv_data_pos += data_to_upload; 5511 } 5512 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5513 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5514 return true; 5515 } 5516 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5517 uint16_t pos = advertising_set->scan_data_pos; 5518 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5519 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5520 if ((operation & 0x02) != 0){ 5521 advertising_set->scan_data_pos = 0; 5522 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5523 } else { 5524 advertising_set->scan_data_pos += data_to_upload; 5525 } 5526 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5527 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5528 return true; 5529 } 5530 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5531 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5532 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5533 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5534 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5535 advertising_set->advertising_handle, 5536 advertising_set->periodic_params.periodic_advertising_interval_min, 5537 advertising_set->periodic_params.periodic_advertising_interval_max, 5538 advertising_set->periodic_params.periodic_advertising_properties); 5539 return true; 5540 } 5541 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5542 uint16_t pos = advertising_set->periodic_data_pos; 5543 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5544 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5545 if ((operation & 0x02) != 0){ 5546 // last fragment or complete data 5547 operation |= 2; 5548 advertising_set->periodic_data_pos = 0; 5549 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5550 } else { 5551 advertising_set->periodic_data_pos += data_to_upload; 5552 } 5553 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5554 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5555 return true; 5556 } 5557 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5558 } 5559 } 5560 #endif 5561 5562 #endif 5563 5564 #ifdef ENABLE_LE_CENTRAL 5565 // if connect with whitelist was active and is not cancelled yet, wait until next time 5566 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5567 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5568 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 5569 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 5570 #endif 5571 #endif 5572 5573 // LE Whitelist Management 5574 if (whitelist_modification_pending){ 5575 // add/remove entries 5576 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5577 while (btstack_linked_list_iterator_has_next(&lit)){ 5578 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5579 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5580 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5581 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5582 return true; 5583 } 5584 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5585 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5586 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5587 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5588 return true; 5589 } 5590 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5591 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5592 btstack_memory_whitelist_entry_free(entry); 5593 } 5594 } 5595 } 5596 5597 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5598 // LE Resolving List Management 5599 if (resolving_list_supported) { 5600 uint16_t i; 5601 switch (hci_stack->le_resolving_list_state) { 5602 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5603 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5604 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5605 return true; 5606 case LE_RESOLVING_LIST_READ_SIZE: 5607 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5608 hci_send_cmd(&hci_le_read_resolving_list_size); 5609 return true; 5610 case LE_RESOLVING_LIST_SEND_CLEAR: 5611 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5612 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5613 sizeof(hci_stack->le_resolving_list_add_entries)); 5614 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5615 sizeof(hci_stack->le_resolving_list_remove_entries)); 5616 hci_send_cmd(&hci_le_clear_resolving_list); 5617 return true; 5618 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5619 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5620 uint8_t offset = i >> 3; 5621 uint8_t mask = 1 << (i & 7); 5622 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5623 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5624 bd_addr_t peer_identity_addreses; 5625 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5626 sm_key_t peer_irk; 5627 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5628 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5629 5630 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5631 // trigger whitelist entry 'update' (work around for controller bug) 5632 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5633 while (btstack_linked_list_iterator_has_next(&lit)) { 5634 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5635 if (entry->address_type != peer_identity_addr_type) continue; 5636 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5637 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5638 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5639 } 5640 #endif 5641 5642 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5643 peer_identity_addreses); 5644 return true; 5645 } 5646 5647 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5648 5649 /* fall through */ 5650 5651 case LE_RESOLVING_LIST_ADD_ENTRIES: 5652 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5653 uint8_t offset = i >> 3; 5654 uint8_t mask = 1 << (i & 7); 5655 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5656 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5657 bd_addr_t peer_identity_addreses; 5658 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5659 sm_key_t peer_irk; 5660 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5661 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5662 const uint8_t *local_irk = gap_get_persistent_irk(); 5663 // command uses format specifier 'P' that stores 16-byte value without flip 5664 uint8_t local_irk_flipped[16]; 5665 uint8_t peer_irk_flipped[16]; 5666 reverse_128(local_irk, local_irk_flipped); 5667 reverse_128(peer_irk, peer_irk_flipped); 5668 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5669 peer_irk_flipped, local_irk_flipped); 5670 return true; 5671 } 5672 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5673 break; 5674 5675 default: 5676 break; 5677 } 5678 } 5679 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5680 #endif 5681 5682 #ifdef ENABLE_LE_CENTRAL 5683 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5684 // LE Whitelist Management 5685 if (periodic_list_modification_pending){ 5686 // add/remove entries 5687 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5688 while (btstack_linked_list_iterator_has_next(&lit)){ 5689 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5690 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 5691 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 5692 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 5693 return true; 5694 } 5695 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 5696 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 5697 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 5698 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address, entry->sid); 5699 return true; 5700 } 5701 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 5702 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 5703 btstack_memory_periodic_advertiser_list_entry_free(entry); 5704 } 5705 } 5706 } 5707 #endif 5708 #endif 5709 5710 // post-pone all actions until stack is fully working 5711 if (hci_stack->state != HCI_STATE_WORKING) return false; 5712 5713 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5714 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5715 5716 // Phase 4: restore state 5717 5718 #ifdef ENABLE_LE_CENTRAL 5719 // re-start scanning 5720 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5721 hci_stack->le_scanning_active = true; 5722 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5723 if (hci_extended_advertising_supported()){ 5724 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5725 } else 5726 #endif 5727 { 5728 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5729 } 5730 return true; 5731 } 5732 #endif 5733 5734 #ifdef ENABLE_LE_CENTRAL 5735 // re-start connecting 5736 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5737 bd_addr_t null_addr; 5738 memset(null_addr, 0, 6); 5739 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5740 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5741 hci_send_cmd(&hci_le_create_connection, 5742 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5743 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5744 1, // use whitelist 5745 0, // peer address type 5746 null_addr, // peer bd addr 5747 hci_stack->le_connection_own_addr_type, // our addr type: 5748 hci_stack->le_connection_interval_min, // conn interval min 5749 hci_stack->le_connection_interval_max, // conn interval max 5750 hci_stack->le_connection_latency, // conn latency 5751 hci_stack->le_supervision_timeout, // conn latency 5752 hci_stack->le_minimum_ce_length, // min ce length 5753 hci_stack->le_maximum_ce_length // max ce length 5754 ); 5755 return true; 5756 } 5757 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5758 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 5759 switch(hci_stack->le_periodic_sync_request){ 5760 case LE_CONNECTING_DIRECT: 5761 case LE_CONNECTING_WHITELIST: 5762 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 5763 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 5764 hci_stack->le_periodic_sync_options, 5765 hci_stack->le_periodic_sync_advertising_sid, 5766 hci_stack->le_periodic_sync_advertiser_address_type, 5767 hci_stack->le_periodic_sync_advertiser_address, 5768 hci_stack->le_periodic_sync_skip, 5769 hci_stack->le_periodic_sync_timeout, 5770 hci_stack->le_periodic_sync_cte_type); 5771 return true; 5772 default: 5773 break; 5774 } 5775 } 5776 #endif 5777 #endif 5778 5779 #ifdef ENABLE_LE_PERIPHERAL 5780 // re-start advertising 5781 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5782 // check if advertisements should be enabled given 5783 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5784 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5785 5786 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5787 if (hci_extended_advertising_supported()){ 5788 const uint8_t advertising_handles[] = { 0 }; 5789 const uint16_t durations[] = { 0 }; 5790 const uint16_t max_events[] = { 0 }; 5791 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5792 } else 5793 #endif 5794 { 5795 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5796 } 5797 return true; 5798 } 5799 5800 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5801 if (hci_extended_advertising_supported()) { 5802 btstack_linked_list_iterator_t it; 5803 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5804 while (btstack_linked_list_iterator_has_next(&it)) { 5805 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5806 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5807 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5808 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5809 const uint16_t durations[] = { advertising_set->enable_timeout }; 5810 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5811 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5812 return true; 5813 } 5814 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5815 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5816 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5817 uint8_t enable = 1; 5818 if (advertising_set->periodic_include_adi){ 5819 enable |= 2; 5820 } 5821 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5822 return true; 5823 } 5824 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5825 } 5826 } 5827 #endif 5828 #endif 5829 5830 return false; 5831 } 5832 #endif 5833 5834 static bool hci_run_general_pending_commands(void){ 5835 btstack_linked_item_t * it; 5836 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5837 hci_connection_t * connection = (hci_connection_t *) it; 5838 5839 switch(connection->state){ 5840 case SEND_CREATE_CONNECTION: 5841 switch(connection->address_type){ 5842 #ifdef ENABLE_CLASSIC 5843 case BD_ADDR_TYPE_ACL: 5844 log_info("sending hci_create_connection"); 5845 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5846 break; 5847 #endif 5848 default: 5849 #ifdef ENABLE_BLE 5850 #ifdef ENABLE_LE_CENTRAL 5851 log_info("sending hci_le_create_connection"); 5852 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5853 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5854 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5855 if (hci_extended_advertising_supported()) { 5856 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 5857 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 5858 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 5859 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 5860 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 5861 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 5862 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 5863 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 5864 hci_send_cmd(&hci_le_extended_create_connection, 5865 0, // don't use whitelist 5866 hci_stack->le_connection_own_addr_type, // our addr type: 5867 connection->address_type, // peer address type 5868 connection->address, // peer bd addr 5869 1, // initiating PHY - 1M 5870 le_connection_scan_interval, // conn scan interval 5871 le_connection_scan_window, // conn scan windows 5872 le_connection_interval_min, // conn interval min 5873 le_connection_interval_max, // conn interval max 5874 le_connection_latency, // conn latency 5875 le_supervision_timeout, // conn latency 5876 le_minimum_ce_length, // min ce length 5877 le_maximum_ce_length // max ce length 5878 ); } 5879 else 5880 #endif 5881 { 5882 hci_send_cmd(&hci_le_create_connection, 5883 hci_stack->le_connection_scan_interval, // conn scan interval 5884 hci_stack->le_connection_scan_window, // conn scan windows 5885 0, // don't use whitelist 5886 connection->address_type, // peer address type 5887 connection->address, // peer bd addr 5888 hci_stack->le_connection_own_addr_type, // our addr type: 5889 hci_stack->le_connection_interval_min, // conn interval min 5890 hci_stack->le_connection_interval_max, // conn interval max 5891 hci_stack->le_connection_latency, // conn latency 5892 hci_stack->le_supervision_timeout, // conn latency 5893 hci_stack->le_minimum_ce_length, // min ce length 5894 hci_stack->le_maximum_ce_length // max ce length 5895 ); 5896 } 5897 connection->state = SENT_CREATE_CONNECTION; 5898 #endif 5899 #endif 5900 break; 5901 } 5902 return true; 5903 5904 #ifdef ENABLE_CLASSIC 5905 case RECEIVED_CONNECTION_REQUEST: 5906 connection->role = HCI_ROLE_SLAVE; 5907 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5908 log_info("sending hci_accept_connection_request"); 5909 connection->state = ACCEPTED_CONNECTION_REQUEST; 5910 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5911 return true; 5912 } 5913 break; 5914 #endif 5915 5916 #ifdef ENABLE_BLE 5917 #ifdef ENABLE_LE_CENTRAL 5918 case SEND_CANCEL_CONNECTION: 5919 connection->state = SENT_CANCEL_CONNECTION; 5920 hci_send_cmd(&hci_le_create_connection_cancel); 5921 return true; 5922 #endif 5923 #endif 5924 case SEND_DISCONNECT: 5925 connection->state = SENT_DISCONNECT; 5926 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5927 return true; 5928 5929 default: 5930 break; 5931 } 5932 5933 // no further commands if connection is about to get shut down 5934 if (connection->state == SENT_DISCONNECT) continue; 5935 5936 #ifdef ENABLE_CLASSIC 5937 5938 // Handling link key request requires remote supported features 5939 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5940 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5941 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5942 5943 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5944 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5945 if (have_link_key && security_level_sufficient){ 5946 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5947 } else { 5948 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5949 } 5950 return true; 5951 } 5952 5953 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5954 log_info("denying to pin request"); 5955 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5956 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5957 return true; 5958 } 5959 5960 // security assessment requires remote features 5961 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5962 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5963 hci_ssp_assess_security_on_io_cap_request(connection); 5964 // 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 5965 } 5966 5967 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5968 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5969 // set authentication requirements: 5970 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5971 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5972 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5973 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5974 authreq |= 1; 5975 } 5976 bool bonding = hci_stack->bondable; 5977 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5978 // if we have received IO Cap Response, we're in responder role 5979 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5980 if (bonding && !remote_bonding){ 5981 log_info("Remote not bonding, dropping local flag"); 5982 bonding = false; 5983 } 5984 } 5985 if (bonding){ 5986 if (connection->bonding_flags & BONDING_DEDICATED){ 5987 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5988 } else { 5989 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5990 } 5991 } 5992 uint8_t have_oob_data = 0; 5993 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5994 if (connection->classic_oob_c_192 != NULL){ 5995 have_oob_data |= 1; 5996 } 5997 if (connection->classic_oob_c_256 != NULL){ 5998 have_oob_data |= 2; 5999 } 6000 #endif 6001 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 6002 return true; 6003 } 6004 6005 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 6006 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6007 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 6008 return true; 6009 } 6010 6011 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6012 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6013 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6014 const uint8_t zero[16] = { 0 }; 6015 const uint8_t * r_192 = zero; 6016 const uint8_t * c_192 = zero; 6017 const uint8_t * r_256 = zero; 6018 const uint8_t * c_256 = zero; 6019 // verify P-256 OOB 6020 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6021 c_256 = connection->classic_oob_c_256; 6022 if (connection->classic_oob_r_256 != NULL) { 6023 r_256 = connection->classic_oob_r_256; 6024 } 6025 } 6026 // verify P-192 OOB 6027 if ((connection->classic_oob_c_192 != NULL)) { 6028 c_192 = connection->classic_oob_c_192; 6029 if (connection->classic_oob_r_192 != NULL) { 6030 r_192 = connection->classic_oob_r_192; 6031 } 6032 } 6033 6034 // assess security 6035 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6036 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6037 if (need_level_4 && !can_reach_level_4){ 6038 log_info("Level 4 required, but not possible -> abort"); 6039 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6040 // send oob negative reply 6041 c_256 = NULL; 6042 c_192 = NULL; 6043 } 6044 6045 // Reply 6046 if (c_256 != zero) { 6047 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6048 } else if (c_192 != zero){ 6049 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6050 } else { 6051 hci_stack->classic_oob_con_handle = connection->con_handle; 6052 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6053 } 6054 return true; 6055 } 6056 #endif 6057 6058 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6059 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6060 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6061 return true; 6062 } 6063 6064 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6065 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6066 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6067 return true; 6068 } 6069 6070 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6071 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6072 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6073 return true; 6074 } 6075 6076 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6077 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6078 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6079 connection->state = SENT_DISCONNECT; 6080 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6081 return true; 6082 } 6083 6084 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6085 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6086 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6087 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6088 return true; 6089 } 6090 6091 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6092 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6093 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6094 return true; 6095 } 6096 6097 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6098 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6099 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6100 return true; 6101 } 6102 6103 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6104 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6105 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6106 return true; 6107 } 6108 6109 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6110 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6111 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6112 return true; 6113 } 6114 6115 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6116 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6117 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6118 return true; 6119 } 6120 #endif 6121 6122 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6123 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6124 #ifdef ENABLE_CLASSIC 6125 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6126 #endif 6127 if (connection->state != SENT_DISCONNECT){ 6128 connection->state = SENT_DISCONNECT; 6129 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6130 return true; 6131 } 6132 } 6133 6134 #ifdef ENABLE_CLASSIC 6135 uint16_t sniff_min_interval; 6136 switch (connection->sniff_min_interval){ 6137 case 0: 6138 break; 6139 case 0xffff: 6140 connection->sniff_min_interval = 0; 6141 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6142 return true; 6143 default: 6144 sniff_min_interval = connection->sniff_min_interval; 6145 connection->sniff_min_interval = 0; 6146 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6147 return true; 6148 } 6149 6150 if (connection->sniff_subrating_max_latency != 0xffff){ 6151 uint16_t max_latency = connection->sniff_subrating_max_latency; 6152 connection->sniff_subrating_max_latency = 0; 6153 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6154 return true; 6155 } 6156 6157 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6158 uint8_t service_type = (uint8_t) connection->qos_service_type; 6159 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6160 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); 6161 return true; 6162 } 6163 6164 if (connection->request_role != HCI_ROLE_INVALID){ 6165 hci_role_t role = connection->request_role; 6166 connection->request_role = HCI_ROLE_INVALID; 6167 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6168 return true; 6169 } 6170 #endif 6171 6172 if (connection->gap_connection_tasks != 0){ 6173 #ifdef ENABLE_CLASSIC 6174 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6175 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6176 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6177 return true; 6178 } 6179 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6180 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6181 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6182 return true; 6183 } 6184 #endif 6185 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6186 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6187 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6188 return true; 6189 } 6190 } 6191 6192 #ifdef ENABLE_BLE 6193 switch (connection->le_con_parameter_update_state){ 6194 // response to L2CAP CON PARAMETER UPDATE REQUEST 6195 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6196 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6197 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6198 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6199 0x0000, 0xffff); 6200 return true; 6201 case CON_PARAMETER_UPDATE_REPLY: 6202 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6203 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6204 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6205 0x0000, 0xffff); 6206 return true; 6207 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6208 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6209 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6210 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6211 return true; 6212 default: 6213 break; 6214 } 6215 if (connection->le_phy_update_all_phys != 0xffu){ 6216 uint8_t all_phys = connection->le_phy_update_all_phys; 6217 connection->le_phy_update_all_phys = 0xff; 6218 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); 6219 return true; 6220 } 6221 #endif 6222 } 6223 return false; 6224 } 6225 6226 static void hci_run(void){ 6227 6228 // stack state sub statemachines 6229 switch (hci_stack->state) { 6230 case HCI_STATE_INITIALIZING: 6231 hci_initializing_run(); 6232 break; 6233 case HCI_STATE_HALTING: 6234 hci_halting_run(); 6235 break; 6236 case HCI_STATE_FALLING_ASLEEP: 6237 hci_falling_asleep_run(); 6238 break; 6239 default: 6240 break; 6241 } 6242 6243 // allow to run after initialization to working transition 6244 if (hci_stack->state != HCI_STATE_WORKING){ 6245 return; 6246 } 6247 6248 bool done; 6249 6250 // send continuation fragments first, as they block the prepared packet buffer 6251 done = hci_run_acl_fragments(); 6252 if (done) return; 6253 6254 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6255 done = hci_run_iso_fragments(); 6256 if (done) return; 6257 #endif 6258 6259 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6260 // send host num completed packets next as they don't require num_cmd_packets > 0 6261 if (!hci_can_send_comand_packet_transport()) return; 6262 if (hci_stack->host_completed_packets){ 6263 hci_host_num_completed_packets(); 6264 return; 6265 } 6266 #endif 6267 6268 if (!hci_can_send_command_packet_now()) return; 6269 6270 // global/non-connection oriented commands 6271 6272 6273 #ifdef ENABLE_CLASSIC 6274 // general gap classic 6275 done = hci_run_general_gap_classic(); 6276 if (done) return; 6277 #endif 6278 6279 #ifdef ENABLE_BLE 6280 // general gap le 6281 done = hci_run_general_gap_le(); 6282 if (done) return; 6283 #endif 6284 6285 // send pending HCI commands 6286 hci_run_general_pending_commands(); 6287 } 6288 6289 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 6290 // house-keeping 6291 6292 #ifdef ENABLE_CLASSIC 6293 bd_addr_t addr; 6294 hci_connection_t * conn; 6295 #endif 6296 #ifdef ENABLE_LE_CENTRAL 6297 uint8_t initiator_filter_policy; 6298 #endif 6299 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6300 uint8_t i; 6301 uint8_t num_cis; 6302 hci_con_handle_t cis_handle; 6303 uint8_t status; 6304 #endif 6305 6306 uint16_t opcode = little_endian_read_16(packet, 0); 6307 switch (opcode) { 6308 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 6309 hci_stack->loopback_mode = packet[3]; 6310 break; 6311 6312 #ifdef ENABLE_CLASSIC 6313 case HCI_OPCODE_HCI_CREATE_CONNECTION: 6314 reverse_bd_addr(&packet[3], addr); 6315 log_info("Create_connection to %s", bd_addr_to_str(addr)); 6316 6317 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 6318 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 6319 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 6320 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 6321 } 6322 6323 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6324 if (!conn) { 6325 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6326 if (!conn) { 6327 // notify client that alloc failed 6328 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6329 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 6330 } 6331 conn->state = SEND_CREATE_CONNECTION; 6332 conn->role = HCI_ROLE_MASTER; 6333 } 6334 6335 log_info("conn state %u", conn->state); 6336 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 6337 switch (conn->state) { 6338 // if connection active exists 6339 case OPEN: 6340 // and OPEN, emit connection complete command 6341 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 6342 // packet not sent to controller 6343 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6344 case RECEIVED_DISCONNECTION_COMPLETE: 6345 // create connection triggered in disconnect complete event, let's do it now 6346 break; 6347 case SEND_CREATE_CONNECTION: 6348 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 6349 if (hci_classic_operation_active()){ 6350 return ERROR_CODE_SUCCESS; 6351 } 6352 #endif 6353 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 6354 break; 6355 default: 6356 // otherwise, just ignore as it is already in the open process 6357 // packet not sent to controller 6358 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6359 } 6360 conn->state = SENT_CREATE_CONNECTION; 6361 6362 // track outgoing connection 6363 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 6364 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 6365 break; 6366 6367 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 6368 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 6369 // setup_synchronous_connection? Voice setting at offset 22 6370 // TODO: compare to current setting if sco connection already active 6371 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 6372 break; 6373 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 6374 // accept_synchronous_connection? Voice setting at offset 18 6375 // TODO: compare to current setting if sco connection already active 6376 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 6377 // track outgoing connection 6378 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 6379 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 6380 break; 6381 #endif 6382 #endif 6383 6384 #ifdef ENABLE_BLE 6385 #ifdef ENABLE_LE_CENTRAL 6386 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6387 // white list used? 6388 initiator_filter_policy = packet[7]; 6389 switch (initiator_filter_policy) { 6390 case 0: 6391 // whitelist not used 6392 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6393 break; 6394 case 1: 6395 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6396 break; 6397 default: 6398 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6399 break; 6400 } 6401 // track outgoing connection 6402 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6403 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6404 break; 6405 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6406 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6407 break; 6408 #endif 6409 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6410 #ifdef ENABLE_LE_CENTRAL 6411 case HCI_OPCODE_HCI_LE_CREATE_CIS: 6412 status = ERROR_CODE_SUCCESS; 6413 num_cis = packet[3]; 6414 // setup hci_iso_streams 6415 for (i=0;i<num_cis;i++){ 6416 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 4 + (4 * i)); 6417 status = hci_iso_stream_create(cis_handle); 6418 if (status != ERROR_CODE_SUCCESS) { 6419 break; 6420 } 6421 } 6422 // free structs on error 6423 if (status != ERROR_CODE_SUCCESS){ 6424 hci_iso_stream_requested_finalize(); 6425 return status; 6426 } 6427 break; 6428 #endif /* ENABLE_LE_CENTRAL */ 6429 #ifdef ENABLE_LE_PERIPHERAL 6430 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 6431 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 3); 6432 status = hci_iso_stream_create(cis_handle); 6433 if (status != ERROR_CODE_SUCCESS){ 6434 return status; 6435 } 6436 break; 6437 #endif /* ENABLE_LE_PERIPHERAL */ 6438 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6439 #endif /* ENABLE_BLE */ 6440 default: 6441 break; 6442 } 6443 6444 hci_stack->num_cmd_packets--; 6445 6446 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6447 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6448 if (err != 0){ 6449 return ERROR_CODE_HARDWARE_FAILURE; 6450 } 6451 return ERROR_CODE_SUCCESS; 6452 } 6453 6454 // disconnect because of security block 6455 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6456 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6457 if (!connection) return; 6458 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6459 } 6460 6461 6462 // Configure Secure Simple Pairing 6463 6464 #ifdef ENABLE_CLASSIC 6465 6466 // enable will enable SSP during init 6467 void gap_ssp_set_enable(int enable){ 6468 hci_stack->ssp_enable = enable; 6469 } 6470 6471 static int hci_local_ssp_activated(void){ 6472 return gap_ssp_supported() && hci_stack->ssp_enable; 6473 } 6474 6475 // if set, BTstack will respond to io capability request using authentication requirement 6476 void gap_ssp_set_io_capability(int io_capability){ 6477 hci_stack->ssp_io_capability = io_capability; 6478 } 6479 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6480 hci_stack->ssp_authentication_requirement = authentication_requirement; 6481 } 6482 6483 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6484 void gap_ssp_set_auto_accept(int auto_accept){ 6485 hci_stack->ssp_auto_accept = auto_accept; 6486 } 6487 6488 void gap_secure_connections_enable(bool enable){ 6489 hci_stack->secure_connections_enable = enable; 6490 } 6491 bool gap_secure_connections_active(void){ 6492 return hci_stack->secure_connections_active; 6493 } 6494 6495 #endif 6496 6497 // va_list part of hci_send_cmd 6498 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6499 if (!hci_can_send_command_packet_now()){ 6500 log_error("hci_send_cmd called but cannot send packet now"); 6501 return ERROR_CODE_COMMAND_DISALLOWED; 6502 } 6503 6504 // for HCI INITIALIZATION 6505 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6506 hci_stack->last_cmd_opcode = cmd->opcode; 6507 6508 hci_reserve_packet_buffer(); 6509 uint8_t * packet = hci_stack->hci_packet_buffer; 6510 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6511 uint8_t status = hci_send_cmd_packet(packet, size); 6512 6513 // release packet buffer on error or for synchronous transport implementations 6514 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6515 hci_release_packet_buffer(); 6516 hci_emit_transport_packet_sent(); 6517 } 6518 6519 return status; 6520 } 6521 6522 /** 6523 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6524 */ 6525 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6526 va_list argptr; 6527 va_start(argptr, cmd); 6528 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6529 va_end(argptr); 6530 return status; 6531 } 6532 6533 // Create various non-HCI events. 6534 // TODO: generalize, use table similar to hci_create_command 6535 6536 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6537 // dump packet 6538 if (dump) { 6539 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 6540 } 6541 6542 // dispatch to all event handlers 6543 btstack_linked_list_iterator_t it; 6544 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6545 while (btstack_linked_list_iterator_has_next(&it)){ 6546 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6547 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6548 } 6549 } 6550 6551 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6552 if (!hci_stack->acl_packet_handler) return; 6553 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6554 } 6555 6556 #ifdef ENABLE_CLASSIC 6557 static void hci_notify_if_sco_can_send_now(void){ 6558 // notify SCO sender if waiting 6559 if (!hci_stack->sco_waiting_for_can_send_now) return; 6560 if (hci_can_send_sco_packet_now()){ 6561 hci_stack->sco_waiting_for_can_send_now = 0; 6562 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6563 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6564 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6565 } 6566 } 6567 6568 // parsing end emitting has been merged to reduce code size 6569 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6570 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6571 6572 uint8_t * eir_data; 6573 ad_context_t context; 6574 const uint8_t * name; 6575 uint8_t name_len; 6576 6577 if (size < 3) return; 6578 6579 int event_type = hci_event_packet_get_type(packet); 6580 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6581 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6582 6583 switch (event_type){ 6584 case HCI_EVENT_INQUIRY_RESULT: 6585 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6586 if (size != (3 + (num_responses * 14))) return; 6587 break; 6588 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6589 if (size != 257) return; 6590 if (num_responses != 1) return; 6591 break; 6592 default: 6593 return; 6594 } 6595 6596 // event[1] is set at the end 6597 int i; 6598 for (i=0; i<num_responses;i++){ 6599 memset(event, 0, sizeof(event)); 6600 event[0] = GAP_EVENT_INQUIRY_RESULT; 6601 uint8_t event_size = 27; // if name is not set by EIR 6602 6603 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6604 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6605 (void)memcpy(&event[9], 6606 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6607 3); // class of device 6608 (void)memcpy(&event[12], 6609 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6610 2); // clock offset 6611 6612 switch (event_type){ 6613 case HCI_EVENT_INQUIRY_RESULT: 6614 // 14,15,16,17 = 0, size 18 6615 break; 6616 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6617 event[14] = 1; 6618 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6619 // 16,17 = 0, size 18 6620 break; 6621 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6622 event[14] = 1; 6623 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6624 // EIR packets only contain a single inquiry response 6625 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6626 name = NULL; 6627 // Iterate over EIR data 6628 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6629 uint8_t data_type = ad_iterator_get_data_type(&context); 6630 uint8_t data_size = ad_iterator_get_data_len(&context); 6631 const uint8_t * data = ad_iterator_get_data(&context); 6632 // Prefer Complete Local Name over Shortened Local Name 6633 switch (data_type){ 6634 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6635 if (name) continue; 6636 /* fall through */ 6637 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6638 name = data; 6639 name_len = data_size; 6640 break; 6641 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6642 if (data_size != 8) break; 6643 event[16] = 1; 6644 memcpy(&event[17], data, 8); 6645 break; 6646 default: 6647 break; 6648 } 6649 } 6650 if (name){ 6651 event[25] = 1; 6652 // truncate name if needed 6653 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6654 event[26] = len; 6655 (void)memcpy(&event[27], name, len); 6656 event_size += len; 6657 } 6658 break; 6659 default: 6660 return; 6661 } 6662 event[1] = event_size - 2; 6663 hci_emit_event(event, event_size, 1); 6664 } 6665 } 6666 #endif 6667 6668 void hci_emit_state(void){ 6669 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6670 uint8_t event[3]; 6671 event[0] = BTSTACK_EVENT_STATE; 6672 event[1] = sizeof(event) - 2u; 6673 event[2] = hci_stack->state; 6674 hci_emit_event(event, sizeof(event), 1); 6675 } 6676 6677 #ifdef ENABLE_CLASSIC 6678 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6679 uint8_t event[13]; 6680 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6681 event[1] = sizeof(event) - 2; 6682 event[2] = status; 6683 little_endian_store_16(event, 3, con_handle); 6684 reverse_bd_addr(address, &event[5]); 6685 event[11] = 1; // ACL connection 6686 event[12] = 0; // encryption disabled 6687 hci_emit_event(event, sizeof(event), 1); 6688 } 6689 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6690 if (disable_l2cap_timeouts) return; 6691 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6692 uint8_t event[4]; 6693 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6694 event[1] = sizeof(event) - 2; 6695 little_endian_store_16(event, 2, conn->con_handle); 6696 hci_emit_event(event, sizeof(event), 1); 6697 } 6698 #endif 6699 6700 #ifdef ENABLE_BLE 6701 #ifdef ENABLE_LE_CENTRAL 6702 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){ 6703 uint8_t event[21]; 6704 event[0] = HCI_EVENT_LE_META; 6705 event[1] = sizeof(event) - 2u; 6706 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6707 event[3] = status; 6708 little_endian_store_16(event, 4, con_handle); 6709 event[6] = 0; // TODO: role 6710 event[7] = address_type; 6711 reverse_bd_addr(address, &event[8]); 6712 little_endian_store_16(event, 14, 0); // interval 6713 little_endian_store_16(event, 16, 0); // latency 6714 little_endian_store_16(event, 18, 0); // supervision timeout 6715 event[20] = 0; // master clock accuracy 6716 hci_emit_event(event, sizeof(event), 1); 6717 } 6718 #endif 6719 #endif 6720 6721 static void hci_emit_transport_packet_sent(void){ 6722 // notify upper stack that it might be possible to send again 6723 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6724 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6725 } 6726 6727 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6728 uint8_t event[6]; 6729 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6730 event[1] = sizeof(event) - 2u; 6731 event[2] = 0; // status = OK 6732 little_endian_store_16(event, 3, con_handle); 6733 event[5] = reason; 6734 hci_emit_event(event, sizeof(event), 1); 6735 } 6736 6737 static void hci_emit_nr_connections_changed(void){ 6738 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6739 uint8_t event[3]; 6740 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6741 event[1] = sizeof(event) - 2u; 6742 event[2] = nr_hci_connections(); 6743 hci_emit_event(event, sizeof(event), 1); 6744 } 6745 6746 static void hci_emit_hci_open_failed(void){ 6747 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6748 uint8_t event[2]; 6749 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6750 event[1] = sizeof(event) - 2u; 6751 hci_emit_event(event, sizeof(event), 1); 6752 } 6753 6754 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6755 log_info("hci_emit_dedicated_bonding_result %u ", status); 6756 uint8_t event[9]; 6757 int pos = 0; 6758 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6759 event[pos++] = sizeof(event) - 2u; 6760 event[pos++] = status; 6761 reverse_bd_addr(address, &event[pos]); 6762 hci_emit_event(event, sizeof(event), 1); 6763 } 6764 6765 6766 #ifdef ENABLE_CLASSIC 6767 6768 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6769 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6770 uint8_t event[5]; 6771 int pos = 0; 6772 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6773 event[pos++] = sizeof(event) - 2; 6774 little_endian_store_16(event, 2, con_handle); 6775 pos += 2; 6776 event[pos++] = level; 6777 hci_emit_event(event, sizeof(event), 1); 6778 } 6779 6780 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6781 if (!connection) return LEVEL_0; 6782 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6783 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6784 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6785 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6786 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6787 // LEVEL 4 always requires 128 bit encrytion key size 6788 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6789 security_level = LEVEL_3; 6790 } 6791 return security_level; 6792 } 6793 6794 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable){ 6795 uint8_t event[4]; 6796 event[0] = BTSTACK_EVENT_SCAN_MODE_CHANGED; 6797 event[1] = sizeof(event) - 2; 6798 event[2] = discoverable; 6799 event[3] = connectable; 6800 hci_emit_event(event, sizeof(event), 1); 6801 } 6802 6803 // query if remote side supports eSCO 6804 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6805 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6806 if (!connection) return false; 6807 return (connection->remote_supported_features[0] & 1) != 0; 6808 } 6809 6810 static bool hci_ssp_supported(hci_connection_t * connection){ 6811 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6812 return (connection->bonding_flags & mask) == mask; 6813 } 6814 6815 // query if remote side supports SSP 6816 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6817 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6818 if (!connection) return false; 6819 return hci_ssp_supported(connection) ? 1 : 0; 6820 } 6821 6822 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6823 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6824 } 6825 6826 /** 6827 * Check if remote supported features query has completed 6828 */ 6829 bool hci_remote_features_available(hci_con_handle_t handle){ 6830 hci_connection_t * connection = hci_connection_for_handle(handle); 6831 if (!connection) return false; 6832 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6833 } 6834 6835 /** 6836 * Trigger remote supported features query 6837 */ 6838 6839 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6840 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6841 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6842 } 6843 } 6844 6845 void hci_remote_features_query(hci_con_handle_t con_handle){ 6846 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6847 if (!connection) return; 6848 hci_trigger_remote_features_for_connection(connection); 6849 hci_run(); 6850 } 6851 6852 // GAP API 6853 /** 6854 * @bbrief enable/disable bonding. default is enabled 6855 * @praram enabled 6856 */ 6857 void gap_set_bondable_mode(int enable){ 6858 hci_stack->bondable = enable ? 1 : 0; 6859 } 6860 /** 6861 * @brief Get bondable mode. 6862 * @return 1 if bondable 6863 */ 6864 int gap_get_bondable_mode(void){ 6865 return hci_stack->bondable; 6866 } 6867 6868 /** 6869 * @brief map link keys to security levels 6870 */ 6871 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6872 switch (link_key_type){ 6873 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6874 return LEVEL_4; 6875 case COMBINATION_KEY: 6876 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6877 return LEVEL_3; 6878 default: 6879 return LEVEL_2; 6880 } 6881 } 6882 6883 /** 6884 * @brief map link keys to secure connection yes/no 6885 */ 6886 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6887 switch (link_key_type){ 6888 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6889 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6890 return true; 6891 default: 6892 return false; 6893 } 6894 } 6895 6896 /** 6897 * @brief map link keys to authenticated 6898 */ 6899 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6900 switch (link_key_type){ 6901 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6902 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6903 return true; 6904 default: 6905 return false; 6906 } 6907 } 6908 6909 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6910 log_info("gap_mitm_protection_required_for_security_level %u", level); 6911 return level > LEVEL_2; 6912 } 6913 6914 /** 6915 * @brief get current security level 6916 */ 6917 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6918 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6919 if (!connection) return LEVEL_0; 6920 return gap_security_level_for_connection(connection); 6921 } 6922 6923 /** 6924 * @brief request connection to device to 6925 * @result GAP_AUTHENTICATION_RESULT 6926 */ 6927 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6928 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6929 if (!connection){ 6930 hci_emit_security_level(con_handle, LEVEL_0); 6931 return; 6932 } 6933 6934 btstack_assert(hci_is_le_connection(connection) == false); 6935 6936 // 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) 6937 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6938 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6939 requested_level = LEVEL_4; 6940 } 6941 6942 gap_security_level_t current_level = gap_security_level(con_handle); 6943 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6944 requested_level, connection->requested_security_level, current_level); 6945 6946 // authentication active if authentication request was sent or planned level > 0 6947 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6948 if (authentication_active){ 6949 // authentication already active 6950 if (connection->requested_security_level < requested_level){ 6951 // increase requested level as new level is higher 6952 // TODO: handle re-authentication when done 6953 connection->requested_security_level = requested_level; 6954 } 6955 } else { 6956 // no request active, notify if security sufficient 6957 if (requested_level <= current_level){ 6958 hci_emit_security_level(con_handle, current_level); 6959 return; 6960 } 6961 6962 // store request 6963 connection->requested_security_level = requested_level; 6964 6965 // start to authenticate connection 6966 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6967 6968 // request remote features if not already active, also trigger hci_run 6969 hci_remote_features_query(con_handle); 6970 } 6971 } 6972 6973 /** 6974 * @brief start dedicated bonding with device. disconnect after bonding 6975 * @param device 6976 * @param request MITM protection 6977 * @result GAP_DEDICATED_BONDING_COMPLETE 6978 */ 6979 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6980 6981 // create connection state machine 6982 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6983 6984 if (!connection){ 6985 return BTSTACK_MEMORY_ALLOC_FAILED; 6986 } 6987 6988 // delete linkn key 6989 gap_drop_link_key_for_bd_addr(device); 6990 6991 // configure LEVEL_2/3, dedicated bonding 6992 connection->state = SEND_CREATE_CONNECTION; 6993 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6994 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6995 connection->bonding_flags = BONDING_DEDICATED; 6996 6997 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6998 6999 // handle: connnection failure (connection complete != ok) 7000 // handle: authentication failure 7001 // handle: disconnect on done 7002 7003 hci_run(); 7004 7005 return 0; 7006 } 7007 7008 void gap_set_local_name(const char * local_name){ 7009 hci_stack->local_name = local_name; 7010 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7011 // also update EIR if not set by user 7012 if (hci_stack->eir_data == NULL){ 7013 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7014 } 7015 hci_run(); 7016 } 7017 #endif 7018 7019 7020 #ifdef ENABLE_BLE 7021 7022 #ifdef ENABLE_LE_CENTRAL 7023 void gap_start_scan(void){ 7024 hci_stack->le_scanning_enabled = true; 7025 hci_run(); 7026 } 7027 7028 void gap_stop_scan(void){ 7029 hci_stack->le_scanning_enabled = false; 7030 hci_run(); 7031 } 7032 7033 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7034 hci_stack->le_scan_type = scan_type; 7035 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7036 hci_stack->le_scan_interval = scan_interval; 7037 hci_stack->le_scan_window = scan_window; 7038 hci_stack->le_scanning_param_update = true; 7039 hci_run(); 7040 } 7041 7042 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7043 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7044 } 7045 7046 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7047 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7048 if (!conn){ 7049 // disallow if le connection is already outgoing 7050 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7051 log_error("le connection already active"); 7052 return ERROR_CODE_COMMAND_DISALLOWED; 7053 } 7054 7055 log_info("gap_connect: no connection exists yet, creating context"); 7056 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7057 if (!conn){ 7058 // notify client that alloc failed 7059 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7060 log_info("gap_connect: failed to alloc hci_connection_t"); 7061 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7062 } 7063 7064 // set le connecting state 7065 if (hci_is_le_connection_type(addr_type)){ 7066 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7067 } 7068 7069 conn->state = SEND_CREATE_CONNECTION; 7070 log_info("gap_connect: send create connection next"); 7071 hci_run(); 7072 return ERROR_CODE_SUCCESS; 7073 } 7074 7075 if (!hci_is_le_connection(conn) || 7076 (conn->state == SEND_CREATE_CONNECTION) || 7077 (conn->state == SENT_CREATE_CONNECTION)) { 7078 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7079 log_error("gap_connect: classic connection or connect is already being created"); 7080 return GATT_CLIENT_IN_WRONG_STATE; 7081 } 7082 7083 // check if connection was just disconnected 7084 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7085 log_info("gap_connect: send create connection (again)"); 7086 conn->state = SEND_CREATE_CONNECTION; 7087 hci_run(); 7088 return ERROR_CODE_SUCCESS; 7089 } 7090 7091 log_info("gap_connect: context exists with state %u", conn->state); 7092 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7093 hci_run(); 7094 return ERROR_CODE_SUCCESS; 7095 } 7096 7097 // @assumption: only a single outgoing LE Connection exists 7098 static hci_connection_t * gap_get_outgoing_connection(void){ 7099 btstack_linked_item_t *it; 7100 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7101 hci_connection_t * conn = (hci_connection_t *) it; 7102 if (!hci_is_le_connection(conn)) continue; 7103 switch (conn->state){ 7104 case SEND_CREATE_CONNECTION: 7105 case SENT_CREATE_CONNECTION: 7106 case SENT_CANCEL_CONNECTION: 7107 return conn; 7108 default: 7109 break; 7110 }; 7111 } 7112 return NULL; 7113 } 7114 7115 uint8_t gap_connect_cancel(void){ 7116 hci_connection_t * conn; 7117 switch (hci_stack->le_connecting_request){ 7118 case LE_CONNECTING_IDLE: 7119 break; 7120 case LE_CONNECTING_WHITELIST: 7121 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7122 hci_run(); 7123 break; 7124 case LE_CONNECTING_DIRECT: 7125 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7126 conn = gap_get_outgoing_connection(); 7127 if (conn == NULL){ 7128 hci_run(); 7129 } else { 7130 switch (conn->state){ 7131 case SEND_CREATE_CONNECTION: 7132 // skip sending create connection and emit event instead 7133 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7134 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7135 btstack_memory_hci_connection_free( conn ); 7136 break; 7137 case SENT_CREATE_CONNECTION: 7138 // request to send cancel connection 7139 conn->state = SEND_CANCEL_CONNECTION; 7140 hci_run(); 7141 break; 7142 default: 7143 break; 7144 } 7145 } 7146 break; 7147 default: 7148 btstack_unreachable(); 7149 break; 7150 } 7151 return ERROR_CODE_SUCCESS; 7152 } 7153 7154 /** 7155 * @brief Set connection parameters for outgoing connections 7156 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7157 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7158 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7159 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7160 * @param conn_latency, default: 4 7161 * @param supervision_timeout (unit: 10ms), default: 720 ms 7162 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7163 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7164 */ 7165 7166 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7167 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7168 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7169 hci_stack->le_connection_scan_interval = conn_scan_interval; 7170 hci_stack->le_connection_scan_window = conn_scan_window; 7171 hci_stack->le_connection_interval_min = conn_interval_min; 7172 hci_stack->le_connection_interval_max = conn_interval_max; 7173 hci_stack->le_connection_latency = conn_latency; 7174 hci_stack->le_supervision_timeout = supervision_timeout; 7175 hci_stack->le_minimum_ce_length = min_ce_length; 7176 hci_stack->le_maximum_ce_length = max_ce_length; 7177 } 7178 #endif 7179 7180 /** 7181 * @brief Updates the connection parameters for a given LE connection 7182 * @param handle 7183 * @param conn_interval_min (unit: 1.25ms) 7184 * @param conn_interval_max (unit: 1.25ms) 7185 * @param conn_latency 7186 * @param supervision_timeout (unit: 10ms) 7187 * @return 0 if ok 7188 */ 7189 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7190 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7191 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7192 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7193 connection->le_conn_interval_min = conn_interval_min; 7194 connection->le_conn_interval_max = conn_interval_max; 7195 connection->le_conn_latency = conn_latency; 7196 connection->le_supervision_timeout = supervision_timeout; 7197 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7198 hci_run(); 7199 return 0; 7200 } 7201 7202 /** 7203 * @brief Request an update of the connection parameter for a given LE connection 7204 * @param handle 7205 * @param conn_interval_min (unit: 1.25ms) 7206 * @param conn_interval_max (unit: 1.25ms) 7207 * @param conn_latency 7208 * @param supervision_timeout (unit: 10ms) 7209 * @return 0 if ok 7210 */ 7211 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7212 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7213 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7214 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7215 connection->le_conn_interval_min = conn_interval_min; 7216 connection->le_conn_interval_max = conn_interval_max; 7217 connection->le_conn_latency = conn_latency; 7218 connection->le_supervision_timeout = supervision_timeout; 7219 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7220 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7221 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7222 return 0; 7223 } 7224 7225 #ifdef ENABLE_LE_PERIPHERAL 7226 7227 /** 7228 * @brief Set Advertisement Data 7229 * @param advertising_data_length 7230 * @param advertising_data (max 31 octets) 7231 * @note data is not copied, pointer has to stay valid 7232 */ 7233 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7234 hci_stack->le_advertisements_data_len = advertising_data_length; 7235 hci_stack->le_advertisements_data = advertising_data; 7236 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7237 hci_run(); 7238 } 7239 7240 /** 7241 * @brief Set Scan Response Data 7242 * @param advertising_data_length 7243 * @param advertising_data (max 31 octets) 7244 * @note data is not copied, pointer has to stay valid 7245 */ 7246 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7247 hci_stack->le_scan_response_data_len = scan_response_data_length; 7248 hci_stack->le_scan_response_data = scan_response_data; 7249 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7250 hci_run(); 7251 } 7252 7253 /** 7254 * @brief Set Advertisement Parameters 7255 * @param adv_int_min 7256 * @param adv_int_max 7257 * @param adv_type 7258 * @param direct_address_type 7259 * @param direct_address 7260 * @param channel_map 7261 * @param filter_policy 7262 * 7263 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7264 */ 7265 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7266 uint8_t direct_address_typ, bd_addr_t direct_address, 7267 uint8_t channel_map, uint8_t filter_policy) { 7268 7269 hci_stack->le_advertisements_interval_min = adv_int_min; 7270 hci_stack->le_advertisements_interval_max = adv_int_max; 7271 hci_stack->le_advertisements_type = adv_type; 7272 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7273 hci_stack->le_advertisements_channel_map = channel_map; 7274 hci_stack->le_advertisements_filter_policy = filter_policy; 7275 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7276 6); 7277 7278 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7279 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7280 hci_run(); 7281 } 7282 7283 /** 7284 * @brief Enable/Disable Advertisements 7285 * @param enabled 7286 */ 7287 void gap_advertisements_enable(int enabled){ 7288 if (enabled == 0){ 7289 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7290 } else { 7291 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 7292 } 7293 hci_update_advertisements_enabled_for_current_roles(); 7294 hci_run(); 7295 } 7296 7297 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7298 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 7299 btstack_linked_list_iterator_t it; 7300 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 7301 while (btstack_linked_list_iterator_has_next(&it)){ 7302 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 7303 if ( item->advertising_handle == advertising_handle ) { 7304 return item; 7305 } 7306 } 7307 return NULL; 7308 } 7309 7310 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 7311 // find free advertisement handle 7312 uint8_t advertisement_handle; 7313 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 7314 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 7315 } 7316 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 7317 // clear 7318 memset(storage, 0, sizeof(le_advertising_set_t)); 7319 // copy params 7320 storage->advertising_handle = advertisement_handle; 7321 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7322 // add to list 7323 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 7324 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7325 *out_advertising_handle = advertisement_handle; 7326 // set tasks and start 7327 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7328 hci_run(); 7329 return ERROR_CODE_SUCCESS; 7330 } 7331 7332 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 7333 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7334 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7335 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7336 // set tasks and start 7337 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7338 hci_run(); 7339 return ERROR_CODE_SUCCESS; 7340 } 7341 7342 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 7343 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7344 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7345 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 7346 return ERROR_CODE_SUCCESS; 7347 } 7348 7349 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 7350 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7351 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7352 memcpy(advertising_set->random_address, random_address, 6); 7353 // set tasks and start 7354 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7355 hci_run(); 7356 return ERROR_CODE_SUCCESS; 7357 } 7358 7359 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 7360 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7361 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7362 advertising_set->adv_data = advertising_data; 7363 advertising_set->adv_data_len = advertising_data_length; 7364 // set tasks and start 7365 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7366 hci_run(); 7367 return ERROR_CODE_SUCCESS; 7368 } 7369 7370 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){ 7371 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7372 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7373 advertising_set->scan_data = scan_response_data; 7374 advertising_set->scan_data_len = scan_response_data_length; 7375 // set tasks and start 7376 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7377 hci_run(); 7378 return ERROR_CODE_SUCCESS; 7379 } 7380 7381 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 7382 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7383 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7384 advertising_set->enable_timeout = timeout; 7385 advertising_set->enable_max_scan_events = num_extended_advertising_events; 7386 // set tasks and start 7387 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 7388 hci_run(); 7389 return ERROR_CODE_SUCCESS; 7390 } 7391 7392 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 7393 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7394 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7395 // set tasks and start 7396 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7397 hci_run(); 7398 return ERROR_CODE_SUCCESS; 7399 } 7400 7401 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7402 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7403 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7404 // set tasks and start 7405 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7406 hci_run(); 7407 return ERROR_CODE_SUCCESS; 7408 } 7409 7410 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7411 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 7412 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7413 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7414 // periodic advertising requires neither connectable, scannable, legacy or anonymous 7415 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7416 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 7417 // set tasks and start 7418 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 7419 hci_run(); 7420 return ERROR_CODE_SUCCESS; 7421 } 7422 7423 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 7424 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7425 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7426 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 7427 return ERROR_CODE_SUCCESS; 7428 } 7429 7430 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 7431 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7432 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7433 advertising_set->periodic_data = periodic_data; 7434 advertising_set->periodic_data_len = periodic_data_length; 7435 // set tasks and start 7436 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 7437 hci_run(); 7438 return ERROR_CODE_SUCCESS; 7439 } 7440 7441 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7442 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7443 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7444 // set tasks and start 7445 advertising_set->periodic_include_adi = include_adi; 7446 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7447 hci_run(); 7448 return ERROR_CODE_SUCCESS; 7449 } 7450 7451 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7452 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7453 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7454 // set tasks and start 7455 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7456 hci_run(); 7457 return ERROR_CODE_SUCCESS; 7458 } 7459 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 7460 7461 #endif 7462 7463 #endif 7464 7465 void hci_le_set_own_address_type(uint8_t own_address_type){ 7466 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7467 if (own_address_type == hci_stack->le_own_addr_type) return; 7468 hci_stack->le_own_addr_type = own_address_type; 7469 7470 #ifdef ENABLE_LE_PERIPHERAL 7471 // update advertisement parameters, too 7472 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7473 hci_run(); 7474 #endif 7475 #ifdef ENABLE_LE_CENTRAL 7476 // note: we don't update scan parameters or modify ongoing connection attempts 7477 #endif 7478 } 7479 7480 void hci_le_random_address_set(const bd_addr_t random_address){ 7481 memcpy(hci_stack->le_random_address, random_address, 6); 7482 hci_stack->le_random_address_set = true; 7483 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7484 hci_run(); 7485 } 7486 7487 #endif 7488 7489 uint8_t gap_disconnect(hci_con_handle_t handle){ 7490 hci_connection_t * conn = hci_connection_for_handle(handle); 7491 if (!conn){ 7492 hci_emit_disconnection_complete(handle, 0); 7493 return 0; 7494 } 7495 // ignore if already disconnected 7496 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7497 return 0; 7498 } 7499 conn->state = SEND_DISCONNECT; 7500 hci_run(); 7501 return 0; 7502 } 7503 7504 int gap_read_rssi(hci_con_handle_t con_handle){ 7505 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7506 if (hci_connection == NULL) return 0; 7507 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7508 hci_run(); 7509 return 1; 7510 } 7511 7512 /** 7513 * @brief Get connection type 7514 * @param con_handle 7515 * @result connection_type 7516 */ 7517 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7518 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7519 if (!conn) return GAP_CONNECTION_INVALID; 7520 switch (conn->address_type){ 7521 case BD_ADDR_TYPE_LE_PUBLIC: 7522 case BD_ADDR_TYPE_LE_RANDOM: 7523 return GAP_CONNECTION_LE; 7524 case BD_ADDR_TYPE_SCO: 7525 return GAP_CONNECTION_SCO; 7526 case BD_ADDR_TYPE_ACL: 7527 return GAP_CONNECTION_ACL; 7528 default: 7529 return GAP_CONNECTION_INVALID; 7530 } 7531 } 7532 7533 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7534 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7535 if (!conn) return HCI_ROLE_INVALID; 7536 return (hci_role_t) conn->role; 7537 } 7538 7539 7540 #ifdef ENABLE_CLASSIC 7541 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7542 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7543 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7544 conn->request_role = role; 7545 hci_run(); 7546 return ERROR_CODE_SUCCESS; 7547 } 7548 #endif 7549 7550 #ifdef ENABLE_BLE 7551 7552 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){ 7553 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7554 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7555 7556 conn->le_phy_update_all_phys = all_phys; 7557 conn->le_phy_update_tx_phys = tx_phys; 7558 conn->le_phy_update_rx_phys = rx_phys; 7559 conn->le_phy_update_phy_options = phy_options; 7560 7561 hci_run(); 7562 7563 return 0; 7564 } 7565 7566 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7567 // check if already in list 7568 btstack_linked_list_iterator_t it; 7569 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7570 while (btstack_linked_list_iterator_has_next(&it)) { 7571 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7572 if (entry->address_type != address_type) { 7573 continue; 7574 } 7575 if (memcmp(entry->address, address, 6) != 0) { 7576 continue; 7577 } 7578 // disallow if already scheduled to add 7579 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7580 return ERROR_CODE_COMMAND_DISALLOWED; 7581 } 7582 // still on controller, but scheduled to remove -> re-add 7583 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7584 return ERROR_CODE_SUCCESS; 7585 } 7586 // alloc and add to list 7587 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7588 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7589 entry->address_type = address_type; 7590 (void)memcpy(entry->address, address, 6); 7591 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7592 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7593 return ERROR_CODE_SUCCESS; 7594 } 7595 7596 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7597 btstack_linked_list_iterator_t it; 7598 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7599 while (btstack_linked_list_iterator_has_next(&it)){ 7600 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7601 if (entry->address_type != address_type) { 7602 continue; 7603 } 7604 if (memcmp(entry->address, address, 6) != 0) { 7605 continue; 7606 } 7607 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7608 // remove from controller if already present 7609 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7610 } else { 7611 // directly remove entry from whitelist 7612 btstack_linked_list_iterator_remove(&it); 7613 btstack_memory_whitelist_entry_free(entry); 7614 } 7615 return ERROR_CODE_SUCCESS; 7616 } 7617 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7618 } 7619 7620 static void hci_whitelist_clear(void){ 7621 btstack_linked_list_iterator_t it; 7622 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7623 while (btstack_linked_list_iterator_has_next(&it)){ 7624 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7625 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7626 // remove from controller if already present 7627 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7628 continue; 7629 } 7630 // directly remove entry from whitelist 7631 btstack_linked_list_iterator_remove(&it); 7632 btstack_memory_whitelist_entry_free(entry); 7633 } 7634 } 7635 7636 // free all entries unconditionally 7637 static void hci_whitelist_free(void){ 7638 btstack_linked_list_iterator_t lit; 7639 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7640 while (btstack_linked_list_iterator_has_next(&lit)){ 7641 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7642 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7643 btstack_memory_whitelist_entry_free(entry); 7644 } 7645 } 7646 7647 /** 7648 * @brief Clear Whitelist 7649 * @return 0 if ok 7650 */ 7651 uint8_t gap_whitelist_clear(void){ 7652 hci_whitelist_clear(); 7653 hci_run(); 7654 return ERROR_CODE_SUCCESS; 7655 } 7656 7657 /** 7658 * @brief Add Device to Whitelist 7659 * @param address_typ 7660 * @param address 7661 * @return 0 if ok 7662 */ 7663 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7664 uint8_t status = hci_whitelist_add(address_type, address); 7665 if (status){ 7666 return status; 7667 } 7668 hci_run(); 7669 return ERROR_CODE_SUCCESS; 7670 } 7671 7672 /** 7673 * @brief Remove Device from Whitelist 7674 * @param address_typ 7675 * @param address 7676 * @return 0 if ok 7677 */ 7678 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7679 uint8_t status = hci_whitelist_remove(address_type, address); 7680 if (status){ 7681 return status; 7682 } 7683 hci_run(); 7684 return ERROR_CODE_SUCCESS; 7685 } 7686 7687 #ifdef ENABLE_LE_CENTRAL 7688 /** 7689 * @brief Connect with Whitelist 7690 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7691 * @return - if ok 7692 */ 7693 uint8_t gap_connect_with_whitelist(void){ 7694 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7695 return ERROR_CODE_COMMAND_DISALLOWED; 7696 } 7697 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7698 hci_run(); 7699 return ERROR_CODE_SUCCESS; 7700 } 7701 7702 /** 7703 * @brief Auto Connection Establishment - Start Connecting to device 7704 * @param address_typ 7705 * @param address 7706 * @return 0 if ok 7707 */ 7708 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7709 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7710 return ERROR_CODE_COMMAND_DISALLOWED; 7711 } 7712 7713 uint8_t status = hci_whitelist_add(address_type, address); 7714 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7715 return status; 7716 } 7717 7718 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7719 7720 hci_run(); 7721 return ERROR_CODE_SUCCESS; 7722 } 7723 7724 /** 7725 * @brief Auto Connection Establishment - Stop Connecting to device 7726 * @param address_typ 7727 * @param address 7728 * @return 0 if ok 7729 */ 7730 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7731 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7732 return ERROR_CODE_COMMAND_DISALLOWED; 7733 } 7734 7735 hci_whitelist_remove(address_type, address); 7736 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7737 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7738 } 7739 hci_run(); 7740 return 0; 7741 } 7742 7743 /** 7744 * @brief Auto Connection Establishment - Stop everything 7745 * @note Convenience function to stop all active auto connection attempts 7746 */ 7747 uint8_t gap_auto_connection_stop_all(void){ 7748 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7749 return ERROR_CODE_COMMAND_DISALLOWED; 7750 } 7751 hci_whitelist_clear(); 7752 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7753 hci_run(); 7754 return ERROR_CODE_SUCCESS; 7755 } 7756 7757 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7758 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7759 if (!conn) return 0; 7760 return conn->le_connection_interval; 7761 } 7762 #endif 7763 #endif 7764 7765 #ifdef ENABLE_CLASSIC 7766 /** 7767 * @brief Set Extended Inquiry Response data 7768 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7769 * @note has to be done before stack starts up 7770 */ 7771 void gap_set_extended_inquiry_response(const uint8_t * data){ 7772 hci_stack->eir_data = data; 7773 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7774 hci_run(); 7775 } 7776 7777 /** 7778 * @brief Start GAP Classic Inquiry 7779 * @param duration in 1.28s units 7780 * @return 0 if ok 7781 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7782 */ 7783 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7784 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7785 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7786 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7787 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7788 } 7789 hci_stack->inquiry_state = duration_in_1280ms_units; 7790 hci_stack->inquiry_max_period_length = 0; 7791 hci_stack->inquiry_min_period_length = 0; 7792 hci_run(); 7793 return 0; 7794 } 7795 7796 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 7797 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7798 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7799 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7800 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7801 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7802 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7803 7804 hci_stack->inquiry_state = duration; 7805 hci_stack->inquiry_max_period_length = max_period_length; 7806 hci_stack->inquiry_min_period_length = min_period_length; 7807 hci_run(); 7808 return 0; 7809 } 7810 7811 /** 7812 * @brief Stop GAP Classic Inquiry 7813 * @return 0 if ok 7814 */ 7815 int gap_inquiry_stop(void){ 7816 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7817 // emit inquiry complete event, before it even started 7818 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7819 hci_emit_event(event, sizeof(event), 1); 7820 return 0; 7821 } 7822 switch (hci_stack->inquiry_state){ 7823 case GAP_INQUIRY_STATE_ACTIVE: 7824 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7825 hci_run(); 7826 return ERROR_CODE_SUCCESS; 7827 case GAP_INQUIRY_STATE_PERIODIC: 7828 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 7829 hci_run(); 7830 return ERROR_CODE_SUCCESS; 7831 default: 7832 return ERROR_CODE_COMMAND_DISALLOWED; 7833 } 7834 } 7835 7836 void gap_inquiry_set_lap(uint32_t lap){ 7837 hci_stack->inquiry_lap = lap; 7838 } 7839 7840 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7841 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7842 hci_stack->inquiry_scan_window = inquiry_scan_window; 7843 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7844 hci_run(); 7845 } 7846 7847 7848 /** 7849 * @brief Remote Name Request 7850 * @param addr 7851 * @param page_scan_repetition_mode 7852 * @param clock_offset only used when bit 15 is set 7853 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7854 */ 7855 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7856 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7857 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7858 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7859 hci_stack->remote_name_clock_offset = clock_offset; 7860 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7861 hci_run(); 7862 return 0; 7863 } 7864 7865 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7866 hci_stack->gap_pairing_state = state; 7867 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7868 hci_run(); 7869 return 0; 7870 } 7871 7872 /** 7873 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7874 * @param addr 7875 * @param pin_data 7876 * @param pin_len 7877 * @return 0 if ok 7878 */ 7879 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7880 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7881 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7882 hci_stack->gap_pairing_pin_len = pin_len; 7883 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7884 } 7885 7886 /** 7887 * @brief Legacy Pairing Pin Code Response 7888 * @param addr 7889 * @param pin 7890 * @return 0 if ok 7891 */ 7892 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7893 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, (uint8_t) strlen(pin)); 7894 } 7895 7896 /** 7897 * @brief Abort Legacy Pairing 7898 * @param addr 7899 * @param pin 7900 * @return 0 if ok 7901 */ 7902 int gap_pin_code_negative(bd_addr_t addr){ 7903 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7904 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7905 } 7906 7907 /** 7908 * @brief SSP Passkey Response 7909 * @param addr 7910 * @param passkey 7911 * @return 0 if ok 7912 */ 7913 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7914 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7915 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7916 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7917 } 7918 7919 /** 7920 * @brief Abort SSP Passkey Entry/Pairing 7921 * @param addr 7922 * @param pin 7923 * @return 0 if ok 7924 */ 7925 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7926 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7927 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7928 } 7929 7930 /** 7931 * @brief Accept SSP Numeric Comparison 7932 * @param addr 7933 * @param passkey 7934 * @return 0 if ok 7935 */ 7936 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7937 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7938 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7939 } 7940 7941 /** 7942 * @brief Abort SSP Numeric Comparison/Pairing 7943 * @param addr 7944 * @param pin 7945 * @return 0 if ok 7946 */ 7947 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7948 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7949 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7950 } 7951 7952 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7953 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7954 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7955 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7956 connectionSetAuthenticationFlags(conn, flag); 7957 hci_run(); 7958 return ERROR_CODE_SUCCESS; 7959 } 7960 #endif 7961 7962 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7963 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7964 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7965 } 7966 7967 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7968 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7969 } 7970 #endif 7971 7972 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7973 /** 7974 * @brief Report Remote OOB Data 7975 * @param bd_addr 7976 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7977 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7978 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7979 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7980 */ 7981 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){ 7982 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7983 if (connection == NULL) { 7984 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7985 } 7986 connection->classic_oob_c_192 = c_192; 7987 connection->classic_oob_r_192 = r_192; 7988 7989 // ignore P-256 if not supported by us 7990 if (hci_stack->secure_connections_active){ 7991 connection->classic_oob_c_256 = c_256; 7992 connection->classic_oob_r_256 = r_256; 7993 } 7994 7995 return ERROR_CODE_SUCCESS; 7996 } 7997 /** 7998 * @brief Generate new OOB data 7999 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 8000 */ 8001 void gap_ssp_generate_oob_data(void){ 8002 hci_stack->classic_read_local_oob_data = true; 8003 hci_run(); 8004 } 8005 8006 #endif 8007 8008 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 8009 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 8010 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8011 if (connection == NULL) { 8012 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8013 } 8014 8015 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 8016 connection->link_key_type = type; 8017 8018 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 8019 } 8020 8021 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 8022 /** 8023 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 8024 * @param inquiry_mode see bluetooth_defines.h 8025 */ 8026 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8027 hci_stack->inquiry_mode = inquiry_mode; 8028 } 8029 8030 /** 8031 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8032 */ 8033 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8034 hci_stack->sco_voice_setting = voice_setting; 8035 } 8036 8037 /** 8038 * @brief Get SCO Voice Setting 8039 * @return current voice setting 8040 */ 8041 uint16_t hci_get_sco_voice_setting(void){ 8042 return hci_stack->sco_voice_setting; 8043 } 8044 8045 static int hci_have_usb_transport(void){ 8046 if (!hci_stack->hci_transport) return 0; 8047 const char * transport_name = hci_stack->hci_transport->name; 8048 if (!transport_name) return 0; 8049 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8050 } 8051 8052 /** @brief Get SCO packet length for current SCO Voice setting 8053 * @note Using SCO packets of the exact length is required for USB transfer 8054 * @return Length of SCO packets in bytes (not audio frames) 8055 */ 8056 uint16_t hci_get_sco_packet_length(void){ 8057 uint16_t sco_packet_length = 0; 8058 8059 #ifdef ENABLE_SCO_OVER_HCI 8060 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8061 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8062 8063 if (hci_have_usb_transport()){ 8064 // see Core Spec for H2 USB Transfer. 8065 // 3 byte SCO header + 24 bytes per connection 8066 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8067 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8068 } else { 8069 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8070 sco_packet_length = 3 + 60 * multiplier; 8071 // assert that it still fits inside an SCO buffer 8072 if (sco_packet_length > (hci_stack->sco_data_packet_length + 3)){ 8073 sco_packet_length = 3 + 60; 8074 } 8075 } 8076 #endif 8077 8078 #ifdef HAVE_SCO_TRANSPORT 8079 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8080 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8081 sco_packet_length = 3 + 60 * multiplier; 8082 #endif 8083 return sco_packet_length; 8084 } 8085 8086 /** 8087 * @brief Sets the master/slave policy 8088 * @param policy (0: attempt to become master, 1: let connecting device decide) 8089 */ 8090 void hci_set_master_slave_policy(uint8_t policy){ 8091 hci_stack->master_slave_policy = policy; 8092 } 8093 8094 #endif 8095 8096 HCI_STATE hci_get_state(void){ 8097 return hci_stack->state; 8098 } 8099 8100 #ifdef ENABLE_CLASSIC 8101 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8102 hci_stack->gap_classic_accept_callback = accept_callback; 8103 } 8104 #endif 8105 8106 /** 8107 * @brief Set callback for Bluetooth Hardware Error 8108 */ 8109 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8110 hci_stack->hardware_error_callback = fn; 8111 } 8112 8113 void hci_disconnect_all(void){ 8114 btstack_linked_list_iterator_t it; 8115 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8116 while (btstack_linked_list_iterator_has_next(&it)){ 8117 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8118 if (con->state == SENT_DISCONNECT) continue; 8119 con->state = SEND_DISCONNECT; 8120 } 8121 hci_run(); 8122 } 8123 8124 uint16_t hci_get_manufacturer(void){ 8125 return hci_stack->manufacturer; 8126 } 8127 8128 #ifdef ENABLE_BLE 8129 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8130 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8131 if (!hci_con) return NULL; 8132 return &hci_con->sm_connection; 8133 } 8134 8135 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8136 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8137 #endif 8138 8139 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8140 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8141 if (hci_connection == NULL) return 0; 8142 if (hci_is_le_connection(hci_connection)){ 8143 #ifdef ENABLE_BLE 8144 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8145 if (sm_conn->sm_connection_encrypted) { 8146 return sm_conn->sm_actual_encryption_key_size; 8147 } 8148 #endif 8149 } else { 8150 #ifdef ENABLE_CLASSIC 8151 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8152 return hci_connection->encryption_key_size; 8153 } 8154 #endif 8155 } 8156 return 0; 8157 } 8158 8159 bool gap_authenticated(hci_con_handle_t con_handle){ 8160 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8161 if (hci_connection == NULL) return false; 8162 8163 switch (hci_connection->address_type){ 8164 #ifdef ENABLE_BLE 8165 case BD_ADDR_TYPE_LE_PUBLIC: 8166 case BD_ADDR_TYPE_LE_RANDOM: 8167 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8168 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8169 #endif 8170 #ifdef ENABLE_CLASSIC 8171 case BD_ADDR_TYPE_SCO: 8172 case BD_ADDR_TYPE_ACL: 8173 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8174 #endif 8175 default: 8176 return false; 8177 } 8178 } 8179 8180 bool gap_secure_connection(hci_con_handle_t con_handle){ 8181 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8182 if (hci_connection == NULL) return 0; 8183 8184 switch (hci_connection->address_type){ 8185 #ifdef ENABLE_BLE 8186 case BD_ADDR_TYPE_LE_PUBLIC: 8187 case BD_ADDR_TYPE_LE_RANDOM: 8188 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8189 return hci_connection->sm_connection.sm_connection_sc != 0; 8190 #endif 8191 #ifdef ENABLE_CLASSIC 8192 case BD_ADDR_TYPE_SCO: 8193 case BD_ADDR_TYPE_ACL: 8194 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8195 #endif 8196 default: 8197 return false; 8198 } 8199 } 8200 8201 bool gap_bonded(hci_con_handle_t con_handle){ 8202 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8203 if (hci_connection == NULL) return 0; 8204 8205 #ifdef ENABLE_CLASSIC 8206 link_key_t link_key; 8207 link_key_type_t link_key_type; 8208 #endif 8209 switch (hci_connection->address_type){ 8210 #ifdef ENABLE_BLE 8211 case BD_ADDR_TYPE_LE_PUBLIC: 8212 case BD_ADDR_TYPE_LE_RANDOM: 8213 return hci_connection->sm_connection.sm_le_db_index >= 0; 8214 #endif 8215 #ifdef ENABLE_CLASSIC 8216 case BD_ADDR_TYPE_SCO: 8217 case BD_ADDR_TYPE_ACL: 8218 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8219 #endif 8220 default: 8221 return false; 8222 } 8223 } 8224 8225 #ifdef ENABLE_BLE 8226 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8227 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8228 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8229 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8230 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8231 return sm_conn->sm_connection_authorization_state; 8232 } 8233 #endif 8234 8235 #ifdef ENABLE_CLASSIC 8236 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){ 8237 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8238 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8239 conn->sniff_min_interval = sniff_min_interval; 8240 conn->sniff_max_interval = sniff_max_interval; 8241 conn->sniff_attempt = sniff_attempt; 8242 conn->sniff_timeout = sniff_timeout; 8243 hci_run(); 8244 return 0; 8245 } 8246 8247 /** 8248 * @brief Exit Sniff mode 8249 * @param con_handle 8250 @ @return 0 if ok 8251 */ 8252 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8253 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8254 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8255 conn->sniff_min_interval = 0xffff; 8256 hci_run(); 8257 return 0; 8258 } 8259 8260 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){ 8261 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8262 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8263 conn->sniff_subrating_max_latency = max_latency; 8264 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8265 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8266 hci_run(); 8267 return ERROR_CODE_SUCCESS; 8268 } 8269 8270 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){ 8271 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8272 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8273 conn->qos_service_type = service_type; 8274 conn->qos_token_rate = token_rate; 8275 conn->qos_peak_bandwidth = peak_bandwidth; 8276 conn->qos_latency = latency; 8277 conn->qos_delay_variation = delay_variation; 8278 hci_run(); 8279 return ERROR_CODE_SUCCESS; 8280 } 8281 8282 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 8283 hci_stack->new_page_scan_interval = page_scan_interval; 8284 hci_stack->new_page_scan_window = page_scan_window; 8285 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 8286 hci_run(); 8287 } 8288 8289 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 8290 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 8291 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 8292 hci_run(); 8293 } 8294 8295 void gap_set_page_timeout(uint16_t page_timeout){ 8296 hci_stack->page_timeout = page_timeout; 8297 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 8298 hci_run(); 8299 } 8300 8301 #endif 8302 8303 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 8304 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 8305 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8306 if (le_device_db_index >= le_device_db_max_count()) return; 8307 uint8_t offset = le_device_db_index >> 3; 8308 uint8_t mask = 1 << (le_device_db_index & 7); 8309 hci_stack->le_resolving_list_add_entries[offset] |= mask; 8310 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8311 // note: go back to remove entries, otherwise, a remove + add will skip the add 8312 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8313 } 8314 } 8315 8316 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 8317 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8318 if (le_device_db_index >= le_device_db_max_count()) return; 8319 uint8_t offset = le_device_db_index >> 3; 8320 uint8_t mask = 1 << (le_device_db_index & 7); 8321 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 8322 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8323 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8324 } 8325 } 8326 8327 uint8_t gap_load_resolving_list_from_le_device_db(void){ 8328 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 8329 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 8330 } 8331 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 8332 // restart le resolving list update 8333 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 8334 } 8335 return ERROR_CODE_SUCCESS; 8336 } 8337 #endif 8338 8339 #ifdef ENABLE_BLE 8340 #ifdef ENABLE_LE_CENTRAL 8341 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8342 8343 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8344 // check if already in list 8345 btstack_linked_list_iterator_t it; 8346 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8347 while (btstack_linked_list_iterator_has_next(&it)) { 8348 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 8349 if (entry->sid != advertising_sid) { 8350 continue; 8351 } 8352 if (entry->address_type != address_type) { 8353 continue; 8354 } 8355 if (memcmp(entry->address, address, 6) != 0) { 8356 continue; 8357 } 8358 // disallow if already scheduled to add 8359 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 8360 return ERROR_CODE_COMMAND_DISALLOWED; 8361 } 8362 // still on controller, but scheduled to remove -> re-add 8363 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8364 return ERROR_CODE_SUCCESS; 8365 } 8366 // alloc and add to list 8367 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 8368 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8369 entry->sid = advertising_sid; 8370 entry->address_type = address_type; 8371 (void)memcpy(entry->address, address, 6); 8372 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8373 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 8374 return ERROR_CODE_SUCCESS; 8375 } 8376 8377 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8378 btstack_linked_list_iterator_t it; 8379 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8380 while (btstack_linked_list_iterator_has_next(&it)){ 8381 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8382 if (entry->sid != advertising_sid) { 8383 continue; 8384 } 8385 if (entry->address_type != address_type) { 8386 continue; 8387 } 8388 if (memcmp(entry->address, address, 6) != 0) { 8389 continue; 8390 } 8391 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8392 // remove from controller if already present 8393 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8394 } else { 8395 // directly remove entry from whitelist 8396 btstack_linked_list_iterator_remove(&it); 8397 btstack_memory_periodic_advertiser_list_entry_free(entry); 8398 } 8399 return ERROR_CODE_SUCCESS; 8400 } 8401 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8402 } 8403 8404 static void hci_periodic_advertiser_list_clear(void){ 8405 btstack_linked_list_iterator_t it; 8406 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8407 while (btstack_linked_list_iterator_has_next(&it)){ 8408 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8409 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8410 // remove from controller if already present 8411 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8412 continue; 8413 } 8414 // directly remove entry from whitelist 8415 btstack_linked_list_iterator_remove(&it); 8416 btstack_memory_periodic_advertiser_list_entry_free(entry); 8417 } 8418 } 8419 8420 // free all entries unconditionally 8421 static void hci_periodic_advertiser_list_free(void){ 8422 btstack_linked_list_iterator_t lit; 8423 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 8424 while (btstack_linked_list_iterator_has_next(&lit)){ 8425 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 8426 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 8427 btstack_memory_periodic_advertiser_list_entry_free(entry); 8428 } 8429 } 8430 8431 uint8_t gap_periodic_advertiser_list_clear(void){ 8432 hci_periodic_advertiser_list_clear(); 8433 hci_run(); 8434 return ERROR_CODE_SUCCESS; 8435 } 8436 8437 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8438 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 8439 if (status){ 8440 return status; 8441 } 8442 hci_run(); 8443 return ERROR_CODE_SUCCESS; 8444 } 8445 8446 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8447 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 8448 if (status){ 8449 return status; 8450 } 8451 hci_run(); 8452 return ERROR_CODE_SUCCESS; 8453 } 8454 8455 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 8456 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 8457 // abort if already active 8458 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 8459 return ERROR_CODE_COMMAND_DISALLOWED; 8460 } 8461 // store request 8462 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 8463 hci_stack->le_periodic_sync_options = options; 8464 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 8465 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 8466 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 8467 hci_stack->le_periodic_sync_skip = skip; 8468 hci_stack->le_periodic_sync_timeout = sync_timeout; 8469 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 8470 8471 hci_run(); 8472 return ERROR_CODE_SUCCESS; 8473 } 8474 8475 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 8476 // abort if not requested 8477 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 8478 return ERROR_CODE_COMMAND_DISALLOWED; 8479 } 8480 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 8481 hci_run(); 8482 return ERROR_CODE_SUCCESS; 8483 } 8484 8485 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 8486 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 8487 return ERROR_CODE_COMMAND_DISALLOWED; 8488 } 8489 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 8490 hci_run(); 8491 return ERROR_CODE_SUCCESS; 8492 } 8493 8494 #endif 8495 #endif 8496 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 8497 static uint8_t hci_iso_stream_create(hci_con_handle_t cis_handle){ 8498 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 8499 if (iso_stream == NULL){ 8500 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8501 } else { 8502 iso_stream->state = HCI_ISO_STREAM_STATE_REQUESTED; 8503 iso_stream->con_handle = cis_handle; 8504 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8505 return ERROR_CODE_SUCCESS; 8506 } 8507 } 8508 8509 static hci_iso_stream_t * hci_iso_stream_for_cis_handle(hci_con_handle_t cis_handle){ 8510 btstack_linked_list_iterator_t it; 8511 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8512 while (btstack_linked_list_iterator_has_next(&it)){ 8513 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8514 if ( iso_stream->con_handle == cis_handle ) { 8515 return iso_stream; 8516 } 8517 } 8518 return NULL; 8519 } 8520 8521 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 8522 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8523 btstack_memory_hci_iso_stream_free(iso_stream); 8524 } 8525 8526 static void hci_iso_stream_requested_finalize(void){ 8527 btstack_linked_list_iterator_t it; 8528 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8529 while (btstack_linked_list_iterator_has_next(&it)){ 8530 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8531 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8532 btstack_linked_list_iterator_remove(&it); 8533 btstack_memory_hci_iso_stream_free(iso_stream); 8534 } 8535 } 8536 } 8537 static void hci_iso_stream_requested_confirm(void){ 8538 btstack_linked_list_iterator_t it; 8539 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8540 while (btstack_linked_list_iterator_has_next(&it)){ 8541 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8542 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8543 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 8544 } 8545 } 8546 } 8547 8548 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 8549 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 8550 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 8551 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 8552 return (sdu_len_offset + 2 + sdu_len) == size; 8553 } 8554 8555 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 8556 if (hci_stack->iso_packet_handler == NULL) { 8557 return; 8558 } 8559 if (size < 4) { 8560 return; 8561 } 8562 8563 // parse header 8564 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 8565 uint16_t iso_data_len = little_endian_read_16(packet, 2); 8566 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 8567 hci_iso_stream_t * iso_stream = hci_iso_stream_for_cis_handle(cis_handle); 8568 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 8569 8570 // assert packet is complete 8571 if ((iso_data_len + 4u) != size){ 8572 return; 8573 } 8574 8575 if ((pb_flag & 0x01) == 0){ 8576 if (pb_flag == 0x02){ 8577 // The ISO_Data_Load field contains a header and a complete SDU. 8578 if (hci_iso_sdu_complete(packet, size)) { 8579 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 8580 } 8581 } else { 8582 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 8583 if (iso_stream == NULL){ 8584 return; 8585 } 8586 if (size > HCI_ISO_PAYLOAD_SIZE){ 8587 return; 8588 } 8589 memcpy(iso_stream->reassembly_buffer, packet, size); 8590 // fix pb_flag 8591 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 8592 iso_stream->reassembly_pos = size; 8593 } 8594 } else { 8595 // iso_data_load contains continuation or last fragment of an SDU 8596 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 8597 if (ts_flag != 0){ 8598 return; 8599 } 8600 // append fragment 8601 if (iso_stream == NULL){ 8602 return; 8603 } 8604 if (iso_stream->reassembly_pos == 0){ 8605 return; 8606 } 8607 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 8608 // reset reassembly buffer 8609 iso_stream->reassembly_pos = 0; 8610 return; 8611 } 8612 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 8613 iso_stream->reassembly_pos += iso_data_len; 8614 8615 // deliver if last fragment and SDU complete 8616 if (pb_flag == 0x03){ 8617 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 8618 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 8619 } 8620 iso_stream->reassembly_pos = 0; 8621 } 8622 } 8623 } 8624 8625 8626 #endif 8627 #endif /* ENABLE_BLE */ 8628 8629 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 8630 void hci_setup_test_connections_fuzz(void){ 8631 hci_connection_t * conn; 8632 8633 // default address: 66:55:44:33:00:01 8634 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 8635 8636 // setup Controller info 8637 hci_stack->num_cmd_packets = 255; 8638 hci_stack->acl_packets_total_num = 255; 8639 8640 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 8641 addr[5] = 0x01; 8642 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8643 conn->con_handle = addr[5]; 8644 conn->role = HCI_ROLE_SLAVE; 8645 conn->state = RECEIVED_CONNECTION_REQUEST; 8646 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8647 8648 // setup incoming Classic SCO connection with con handle 0x0002 8649 addr[5] = 0x02; 8650 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8651 conn->con_handle = addr[5]; 8652 conn->role = HCI_ROLE_SLAVE; 8653 conn->state = RECEIVED_CONNECTION_REQUEST; 8654 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8655 8656 // setup ready Classic ACL connection with con handle 0x0003 8657 addr[5] = 0x03; 8658 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8659 conn->con_handle = addr[5]; 8660 conn->role = HCI_ROLE_SLAVE; 8661 conn->state = OPEN; 8662 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8663 8664 // setup ready Classic SCO connection with con handle 0x0004 8665 addr[5] = 0x04; 8666 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8667 conn->con_handle = addr[5]; 8668 conn->role = HCI_ROLE_SLAVE; 8669 conn->state = OPEN; 8670 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8671 8672 // setup ready LE ACL connection with con handle 0x005 and public address 8673 addr[5] = 0x05; 8674 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 8675 conn->con_handle = addr[5]; 8676 conn->role = HCI_ROLE_SLAVE; 8677 conn->state = OPEN; 8678 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8679 conn->sm_connection.sm_connection_encrypted = 1; 8680 } 8681 8682 void hci_free_connections_fuzz(void){ 8683 btstack_linked_list_iterator_t it; 8684 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8685 while (btstack_linked_list_iterator_has_next(&it)){ 8686 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8687 btstack_linked_list_iterator_remove(&it); 8688 btstack_memory_hci_connection_free(con); 8689 } 8690 } 8691 void hci_simulate_working_fuzz(void){ 8692 hci_stack->le_scanning_param_update = false; 8693 hci_init_done(); 8694 hci_stack->num_cmd_packets = 255; 8695 } 8696 #endif 8697