1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_MIN_PERIODIC_LEN_MIN 0x02 115 #define GAP_INQUIRY_MAX_PERIODIC_LEN_MIN 0x03 116 #define GAP_INQUIRY_STATE_IDLE 0x00 117 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 118 #define GAP_INQUIRY_STATE_ACTIVE 0x81 119 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 120 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 121 #define GAP_INQUIRY_STATE_PERIODIC 0x84 122 #define GAP_INQUIRY_STATE_W2_EXIT_PERIODIC 0x85 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // 140 // compact storage of relevant supported HCI Commands. 141 // X-Macro below provides enumeration and mapping table into the supported 142 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 143 // 144 145 // format: command name, byte offset, bit nr in 64-byte supported commands 146 // currently stored in 32-bit variable 147 #define SUPPORTED_HCI_COMMANDS \ 148 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 149 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 150 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 151 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 152 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 153 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 154 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 155 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 156 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 157 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 158 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 159 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 160 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 161 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 162 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 163 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 164 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 165 166 // enumerate supported commands 167 #define X(name, offset, bit) name, 168 enum { 169 SUPPORTED_HCI_COMMANDS 170 SUPPORTED_HCI_COMMANDS_COUNT 171 }; 172 #undef X 173 174 // prototypes 175 #ifdef ENABLE_CLASSIC 176 static void hci_update_scan_enable(void); 177 static void hci_emit_discoverable_enabled(uint8_t enabled); 178 static int hci_local_ssp_activated(void); 179 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 180 static bool hci_ssp_supported(hci_connection_t * connection); 181 static void hci_notify_if_sco_can_send_now(void); 182 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 183 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 184 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 185 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 186 static void hci_connection_timestamp(hci_connection_t *connection); 187 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 188 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 189 #endif 190 191 static int hci_power_control_on(void); 192 static void hci_power_control_off(void); 193 static void hci_state_reset(void); 194 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 195 static void hci_emit_transport_packet_sent(void); 196 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 197 static void hci_emit_nr_connections_changed(void); 198 static void hci_emit_hci_open_failed(void); 199 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 200 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 201 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 202 static void hci_run(void); 203 static int hci_is_le_connection(hci_connection_t * connection); 204 205 #ifdef ENABLE_CLASSIC 206 static int hci_have_usb_transport(void); 207 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 208 #endif 209 210 #ifdef ENABLE_BLE 211 static void hci_whitelist_free(void); 212 #ifdef ENABLE_LE_CENTRAL 213 // called from test/ble_client/advertising_data_parser.c 214 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 215 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 216 static hci_connection_t * gap_get_outgoing_connection(void); 217 static void hci_le_scan_stop(void); 218 static bool hci_run_general_gap_le(void); 219 #endif 220 #ifdef ENABLE_LE_PERIPHERAL 221 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 222 static void hci_periodic_advertiser_list_free(void); 223 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 224 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 225 #endif /* ENABLE_LE_PERIPHERAL */ 226 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 227 static uint8_t hci_iso_stream_create(hci_con_handle_t cis_handle); 228 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream); 229 static hci_iso_stream_t * hci_iso_stream_for_cis_handle(hci_con_handle_t cis_handle); 230 static void hci_iso_stream_requested_finalize(void); 231 static void hci_iso_stream_requested_confirm(void); 232 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 233 #endif /* ENABLE_BLE */ 234 235 // the STACK is here 236 #ifndef HAVE_MALLOC 237 static hci_stack_t hci_stack_static; 238 #endif 239 static hci_stack_t * hci_stack = NULL; 240 241 #ifdef ENABLE_CLASSIC 242 // default name 243 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 244 245 // test helper 246 static uint8_t disable_l2cap_timeouts = 0; 247 #endif 248 249 // reset connection state on create and on reconnect 250 // don't overwrite addr, con handle, role 251 static void hci_connection_init(hci_connection_t * conn){ 252 conn->authentication_flags = AUTH_FLAG_NONE; 253 conn->bonding_flags = 0; 254 conn->requested_security_level = LEVEL_0; 255 #ifdef ENABLE_CLASSIC 256 conn->request_role = HCI_ROLE_INVALID; 257 conn->sniff_subrating_max_latency = 0xffff; 258 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 259 conn->link_key_type = INVALID_LINK_KEY; 260 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 261 btstack_run_loop_set_timer_context(&conn->timeout, conn); 262 hci_connection_timestamp(conn); 263 #endif 264 conn->acl_recombination_length = 0; 265 conn->acl_recombination_pos = 0; 266 conn->num_packets_sent = 0; 267 268 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 269 #ifdef ENABLE_BLE 270 conn->le_phy_update_all_phys = 0xff; 271 #endif 272 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 273 conn->le_max_tx_octets = 27; 274 #endif 275 #ifdef ENABLE_CLASSIC_PAIRING_OOB 276 conn->classic_oob_c_192 = NULL; 277 conn->classic_oob_r_192 = NULL; 278 conn->classic_oob_c_256 = NULL; 279 conn->classic_oob_r_256 = NULL; 280 #endif 281 } 282 283 /** 284 * create connection for given address 285 * 286 * @return connection OR NULL, if no memory left 287 */ 288 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 289 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 290 291 hci_connection_t * conn = btstack_memory_hci_connection_get(); 292 if (!conn) return NULL; 293 hci_connection_init(conn); 294 295 bd_addr_copy(conn->address, addr); 296 conn->address_type = addr_type; 297 conn->con_handle = HCI_CON_HANDLE_INVALID; 298 conn->role = HCI_ROLE_INVALID; 299 300 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 301 302 return conn; 303 } 304 305 306 /** 307 * get le connection parameter range 308 * 309 * @return le connection parameter range struct 310 */ 311 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 312 *range = hci_stack->le_connection_parameter_range; 313 } 314 315 /** 316 * set le connection parameter range 317 * 318 */ 319 320 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 321 hci_stack->le_connection_parameter_range = *range; 322 } 323 324 /** 325 * @brief Test if connection parameters are inside in existing rage 326 * @param conn_interval_min (unit: 1.25ms) 327 * @param conn_interval_max (unit: 1.25ms) 328 * @param conn_latency 329 * @param supervision_timeout (unit: 10ms) 330 * @return 1 if included 331 */ 332 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){ 333 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 334 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 335 336 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 337 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 338 339 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 340 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 341 342 return 1; 343 } 344 345 /** 346 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 347 * @note: default: 1 348 * @param max_peripheral_connections 349 */ 350 #ifdef ENABLE_LE_PERIPHERAL 351 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 352 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 353 } 354 #endif 355 356 /** 357 * get hci connections iterator 358 * 359 * @return hci connections iterator 360 */ 361 362 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 363 btstack_linked_list_iterator_init(it, &hci_stack->connections); 364 } 365 366 /** 367 * get connection for a given handle 368 * 369 * @return connection OR NULL, if not found 370 */ 371 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 372 btstack_linked_list_iterator_t it; 373 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 374 while (btstack_linked_list_iterator_has_next(&it)){ 375 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 376 if ( item->con_handle == con_handle ) { 377 return item; 378 } 379 } 380 return NULL; 381 } 382 383 /** 384 * get connection for given address 385 * 386 * @return connection OR NULL, if not found 387 */ 388 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 389 btstack_linked_list_iterator_t it; 390 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 391 while (btstack_linked_list_iterator_has_next(&it)){ 392 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 393 if (connection->address_type != addr_type) continue; 394 if (memcmp(addr, connection->address, 6) != 0) continue; 395 return connection; 396 } 397 return NULL; 398 } 399 400 #ifdef ENABLE_CLASSIC 401 402 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 403 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 404 } 405 406 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 407 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 408 } 409 410 #ifdef ENABLE_SCO_OVER_HCI 411 static int hci_number_sco_connections(void){ 412 int connections = 0; 413 btstack_linked_list_iterator_t it; 414 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 415 while (btstack_linked_list_iterator_has_next(&it)){ 416 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 417 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 418 connections++; 419 } 420 return connections; 421 } 422 #endif 423 424 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 425 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 426 #ifdef HAVE_EMBEDDED_TICK 427 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 428 // connections might be timed out 429 hci_emit_l2cap_check_timeout(connection); 430 } 431 #else 432 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 433 // connections might be timed out 434 hci_emit_l2cap_check_timeout(connection); 435 } 436 #endif 437 } 438 439 static void hci_connection_timestamp(hci_connection_t *connection){ 440 #ifdef HAVE_EMBEDDED_TICK 441 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 442 #else 443 connection->timestamp = btstack_run_loop_get_time_ms(); 444 #endif 445 } 446 447 /** 448 * add authentication flags and reset timer 449 * @note: assumes classic connection 450 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 451 */ 452 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 453 bd_addr_t addr; 454 reverse_bd_addr(bd_addr, addr); 455 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 456 if (conn) { 457 connectionSetAuthenticationFlags(conn, flags); 458 hci_connection_timestamp(conn); 459 } 460 } 461 462 static bool hci_pairing_active(hci_connection_t * hci_connection){ 463 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 464 } 465 466 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 467 if (hci_pairing_active(hci_connection)) return; 468 if (ssp){ 469 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 470 } else { 471 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 472 } 473 // if we are initiator, we have sent an HCI Authenticate Request 474 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 475 476 // if we are responder, use minimal service security level as required level 477 if (!initiator){ 478 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); 479 } 480 481 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 482 483 uint8_t event[12]; 484 event[0] = GAP_EVENT_PAIRING_STARTED; 485 event[1] = 10; 486 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 487 reverse_bd_addr(hci_connection->address, &event[4]); 488 event[10] = (uint8_t) ssp; 489 event[11] = (uint8_t) initiator; 490 hci_emit_event(event, sizeof(event), 1); 491 } 492 493 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 494 hci_connection->requested_security_level = LEVEL_0; 495 if (!hci_pairing_active(hci_connection)) return; 496 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 497 #ifdef ENABLE_CLASSIC_PAIRING_OOB 498 hci_connection->classic_oob_c_192 = NULL; 499 hci_connection->classic_oob_r_192 = NULL; 500 hci_connection->classic_oob_c_256 = NULL; 501 hci_connection->classic_oob_r_256 = NULL; 502 #endif 503 log_info("pairing complete, status %02x", status); 504 505 uint8_t event[11]; 506 event[0] = GAP_EVENT_PAIRING_COMPLETE; 507 event[1] = 9; 508 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 509 reverse_bd_addr(hci_connection->address, &event[4]); 510 event[10] = status; 511 hci_emit_event(event, sizeof(event), 1); 512 513 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 514 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 515 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 516 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 517 hci_connection->bonding_status = status; 518 } 519 } 520 521 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 522 hci_connection_t * conn = hci_connection_for_handle(handle); 523 if (!conn) return false; 524 return hci_pairing_active(conn); 525 } 526 527 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 528 if (!hci_stack->link_key_db) return; 529 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 530 hci_stack->link_key_db->delete_link_key(addr); 531 } 532 533 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 534 if (!hci_stack->link_key_db) return; 535 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 536 hci_stack->link_key_db->put_link_key(addr, link_key, type); 537 } 538 539 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 540 if (!hci_stack->link_key_db) return false; 541 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 542 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 543 return result; 544 } 545 546 void gap_delete_all_link_keys(void){ 547 bd_addr_t addr; 548 link_key_t link_key; 549 link_key_type_t type; 550 btstack_link_key_iterator_t it; 551 int ok = gap_link_key_iterator_init(&it); 552 if (!ok) { 553 log_error("could not initialize iterator"); 554 return; 555 } 556 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 557 gap_drop_link_key_for_bd_addr(addr); 558 } 559 gap_link_key_iterator_done(&it); 560 } 561 562 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 563 if (!hci_stack->link_key_db) return 0; 564 if (!hci_stack->link_key_db->iterator_init) return 0; 565 return hci_stack->link_key_db->iterator_init(it); 566 } 567 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){ 568 if (!hci_stack->link_key_db) return 0; 569 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 570 } 571 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 572 if (!hci_stack->link_key_db) return; 573 hci_stack->link_key_db->iterator_done(it); 574 } 575 #endif 576 577 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 578 switch (address_type){ 579 case BD_ADDR_TYPE_LE_PUBLIC: 580 case BD_ADDR_TYPE_LE_RANDOM: 581 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 582 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 583 return true; 584 default: 585 return false; 586 } 587 } 588 589 static int hci_is_le_connection(hci_connection_t * connection){ 590 return hci_is_le_connection_type(connection->address_type); 591 } 592 593 /** 594 * count connections 595 */ 596 static int nr_hci_connections(void){ 597 int count = 0; 598 btstack_linked_item_t *it; 599 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 600 count++; 601 } 602 return count; 603 } 604 605 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 606 607 unsigned int num_packets_sent_classic = 0; 608 unsigned int num_packets_sent_le = 0; 609 610 btstack_linked_item_t *it; 611 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 612 hci_connection_t * connection = (hci_connection_t *) it; 613 if (hci_is_le_connection(connection)){ 614 num_packets_sent_le += connection->num_packets_sent; 615 } 616 if (connection->address_type == BD_ADDR_TYPE_ACL){ 617 num_packets_sent_classic += connection->num_packets_sent; 618 } 619 } 620 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 621 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 622 int free_slots_le = 0; 623 624 if (free_slots_classic < 0){ 625 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); 626 return 0; 627 } 628 629 if (hci_stack->le_acl_packets_total_num){ 630 // if we have LE slots, they are used 631 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 632 if (free_slots_le < 0){ 633 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); 634 return 0; 635 } 636 } else { 637 // otherwise, classic slots are used for LE, too 638 free_slots_classic -= num_packets_sent_le; 639 if (free_slots_classic < 0){ 640 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); 641 return 0; 642 } 643 } 644 645 switch (address_type){ 646 case BD_ADDR_TYPE_UNKNOWN: 647 log_error("hci_number_free_acl_slots: unknown address type"); 648 return 0; 649 650 case BD_ADDR_TYPE_ACL: 651 return (uint16_t) free_slots_classic; 652 653 default: 654 if (hci_stack->le_acl_packets_total_num > 0){ 655 return (uint16_t) free_slots_le; 656 } 657 return (uint16_t) free_slots_classic; 658 } 659 } 660 661 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 662 // get connection type 663 hci_connection_t * connection = hci_connection_for_handle(con_handle); 664 if (!connection){ 665 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 666 return 0; 667 } 668 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 669 } 670 671 #ifdef ENABLE_CLASSIC 672 static int hci_number_free_sco_slots(void){ 673 unsigned int num_sco_packets_sent = 0; 674 btstack_linked_item_t *it; 675 if (hci_stack->synchronous_flow_control_enabled){ 676 // explicit flow control 677 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 678 hci_connection_t * connection = (hci_connection_t *) it; 679 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 680 num_sco_packets_sent += connection->num_packets_sent; 681 } 682 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 683 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 684 return 0; 685 } 686 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 687 } else { 688 // implicit flow control -- TODO 689 int num_ready = 0; 690 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 691 hci_connection_t * connection = (hci_connection_t *) it; 692 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 693 if (connection->sco_tx_ready == 0) continue; 694 num_ready++; 695 } 696 return num_ready; 697 } 698 } 699 #endif 700 701 // only used to send HCI Host Number Completed Packets 702 static int hci_can_send_comand_packet_transport(void){ 703 if (hci_stack->hci_packet_buffer_reserved) return 0; 704 705 // check for async hci transport implementations 706 if (hci_stack->hci_transport->can_send_packet_now){ 707 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 708 return 0; 709 } 710 } 711 return 1; 712 } 713 714 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 715 bool hci_can_send_command_packet_now(void){ 716 if (hci_can_send_comand_packet_transport() == 0) return false; 717 return hci_stack->num_cmd_packets > 0u; 718 } 719 720 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 721 // check for async hci transport implementations 722 if (!hci_stack->hci_transport->can_send_packet_now) return true; 723 return hci_stack->hci_transport->can_send_packet_now(packet_type); 724 } 725 726 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 727 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 728 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 729 } 730 731 bool hci_can_send_acl_le_packet_now(void){ 732 if (hci_stack->hci_packet_buffer_reserved) return false; 733 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 734 } 735 736 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 737 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 738 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 739 } 740 741 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 742 if (hci_stack->hci_packet_buffer_reserved) return false; 743 return hci_can_send_prepared_acl_packet_now(con_handle); 744 } 745 746 #ifdef ENABLE_CLASSIC 747 bool hci_can_send_acl_classic_packet_now(void){ 748 if (hci_stack->hci_packet_buffer_reserved) return false; 749 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 750 } 751 752 bool hci_can_send_prepared_sco_packet_now(void){ 753 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 754 if (hci_have_usb_transport()){ 755 return hci_stack->sco_can_send_now; 756 } else { 757 return hci_number_free_sco_slots() > 0; 758 } 759 } 760 761 bool hci_can_send_sco_packet_now(void){ 762 if (hci_stack->hci_packet_buffer_reserved) return false; 763 return hci_can_send_prepared_sco_packet_now(); 764 } 765 766 void hci_request_sco_can_send_now_event(void){ 767 hci_stack->sco_waiting_for_can_send_now = 1; 768 hci_notify_if_sco_can_send_now(); 769 } 770 #endif 771 772 // used for internal checks in l2cap.c 773 bool hci_is_packet_buffer_reserved(void){ 774 return hci_stack->hci_packet_buffer_reserved; 775 } 776 777 // reserves outgoing packet buffer. 778 // @return 1 if successful 779 bool hci_reserve_packet_buffer(void){ 780 if (hci_stack->hci_packet_buffer_reserved) { 781 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 782 return false; 783 } 784 hci_stack->hci_packet_buffer_reserved = true; 785 return true; 786 } 787 788 void hci_release_packet_buffer(void){ 789 hci_stack->hci_packet_buffer_reserved = false; 790 } 791 792 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 793 static int hci_transport_synchronous(void){ 794 return hci_stack->hci_transport->can_send_packet_now == NULL; 795 } 796 797 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 798 799 // 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); 800 801 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 802 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 803 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 804 max_acl_data_packet_length = hci_stack->le_data_packets_length; 805 } 806 807 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 808 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 809 max_acl_data_packet_length = connection->le_max_tx_octets; 810 } 811 #endif 812 813 log_debug("hci_send_acl_packet_fragments entered"); 814 815 uint8_t status = ERROR_CODE_SUCCESS; 816 // multiple packets could be send on a synchronous HCI transport 817 while (true){ 818 819 log_debug("hci_send_acl_packet_fragments loop entered"); 820 821 // get current data 822 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 823 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 824 bool more_fragments = false; 825 826 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 827 if (current_acl_data_packet_length > max_acl_data_packet_length){ 828 more_fragments = true; 829 current_acl_data_packet_length = max_acl_data_packet_length; 830 } 831 832 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 833 if (acl_header_pos > 0u){ 834 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 835 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 836 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 837 } 838 839 // update header len 840 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 841 842 // count packet 843 connection->num_packets_sent++; 844 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 845 846 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 847 if (more_fragments){ 848 // update start of next fragment to send 849 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 850 } else { 851 // done 852 hci_stack->acl_fragmentation_pos = 0; 853 hci_stack->acl_fragmentation_total_size = 0; 854 } 855 856 // send packet 857 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 858 const int size = current_acl_data_packet_length + 4; 859 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 860 hci_stack->acl_fragmentation_tx_active = 1; 861 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 862 if (err != 0){ 863 // no error from HCI Transport expected 864 status = ERROR_CODE_HARDWARE_FAILURE; 865 } 866 867 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 868 869 // done yet? 870 if (!more_fragments) break; 871 872 // can send more? 873 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 874 } 875 876 log_debug("hci_send_acl_packet_fragments loop over"); 877 878 // release buffer now for synchronous transport 879 if (hci_transport_synchronous()){ 880 hci_stack->acl_fragmentation_tx_active = 0; 881 hci_release_packet_buffer(); 882 hci_emit_transport_packet_sent(); 883 } 884 885 return status; 886 } 887 888 // pre: caller has reserved the packet buffer 889 uint8_t hci_send_acl_packet_buffer(int size){ 890 btstack_assert(hci_stack->hci_packet_buffer_reserved); 891 892 uint8_t * packet = hci_stack->hci_packet_buffer; 893 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 894 895 // check for free places on Bluetooth module 896 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 897 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 898 hci_release_packet_buffer(); 899 hci_emit_transport_packet_sent(); 900 return BTSTACK_ACL_BUFFERS_FULL; 901 } 902 903 hci_connection_t *connection = hci_connection_for_handle( con_handle); 904 if (!connection) { 905 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 906 hci_release_packet_buffer(); 907 hci_emit_transport_packet_sent(); 908 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 909 } 910 911 #ifdef ENABLE_CLASSIC 912 hci_connection_timestamp(connection); 913 #endif 914 915 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 916 917 // setup data 918 hci_stack->acl_fragmentation_total_size = size; 919 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 920 921 return hci_send_acl_packet_fragments(connection); 922 } 923 924 #ifdef ENABLE_CLASSIC 925 // pre: caller has reserved the packet buffer 926 uint8_t hci_send_sco_packet_buffer(int size){ 927 btstack_assert(hci_stack->hci_packet_buffer_reserved); 928 929 uint8_t * packet = hci_stack->hci_packet_buffer; 930 931 // skip checks in loopback mode 932 if (!hci_stack->loopback_mode){ 933 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 934 935 // check for free places on Bluetooth module 936 if (!hci_can_send_prepared_sco_packet_now()) { 937 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 938 hci_release_packet_buffer(); 939 hci_emit_transport_packet_sent(); 940 return BTSTACK_ACL_BUFFERS_FULL; 941 } 942 943 // track send packet in connection struct 944 hci_connection_t *connection = hci_connection_for_handle( con_handle); 945 if (!connection) { 946 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 947 hci_release_packet_buffer(); 948 hci_emit_transport_packet_sent(); 949 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 950 } 951 952 if (hci_have_usb_transport()){ 953 // token used 954 hci_stack->sco_can_send_now = false; 955 } else { 956 if (hci_stack->synchronous_flow_control_enabled){ 957 connection->num_packets_sent++; 958 } else { 959 connection->sco_tx_ready--; 960 } 961 } 962 } 963 964 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 965 966 #ifdef HAVE_SCO_TRANSPORT 967 hci_stack->sco_transport->send_packet(packet, size); 968 hci_release_packet_buffer(); 969 hci_emit_transport_packet_sent(); 970 971 return 0; 972 #else 973 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 974 if (hci_transport_synchronous()){ 975 hci_release_packet_buffer(); 976 hci_emit_transport_packet_sent(); 977 } 978 979 if (err != 0){ 980 return ERROR_CODE_HARDWARE_FAILURE; 981 } 982 return ERROR_CODE_SUCCESS; 983 #endif 984 } 985 #endif 986 987 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 988 static uint8_t hci_send_iso_packet_fragments(void){ 989 990 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 991 uint8_t status = ERROR_CODE_SUCCESS; 992 // multiple packets could be send on a synchronous HCI transport 993 while (true){ 994 995 // get current data 996 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 997 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 998 bool more_fragments = false; 999 1000 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 1001 if (current_iso_data_packet_length > max_iso_data_packet_length){ 1002 more_fragments = true; 1003 current_iso_data_packet_length = max_iso_data_packet_length; 1004 } 1005 1006 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1007 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1008 uint8_t pb_flags; 1009 if (iso_header_pos == 0u){ 1010 // first fragment, keep TS field 1011 pb_flags = more_fragments ? 0x00 : 0x02; 1012 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1013 } else { 1014 // later fragment, drop TS field 1015 pb_flags = more_fragments ? 0x01 : 0x03; 1016 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1017 } 1018 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1019 1020 // update header len 1021 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1022 1023 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1024 if (more_fragments){ 1025 // update start of next fragment to send 1026 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1027 } else { 1028 // done 1029 hci_stack->iso_fragmentation_pos = 0; 1030 hci_stack->iso_fragmentation_total_size = 0; 1031 } 1032 1033 // send packet 1034 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1035 const int size = current_iso_data_packet_length + 4; 1036 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1037 hci_stack->iso_fragmentation_tx_active = true; 1038 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1039 if (err != 0){ 1040 // no error from HCI Transport expected 1041 status = ERROR_CODE_HARDWARE_FAILURE; 1042 } 1043 1044 // done yet? 1045 if (!more_fragments) break; 1046 1047 // can send more? 1048 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1049 } 1050 1051 // release buffer now for synchronous transport 1052 if (hci_transport_synchronous()){ 1053 hci_stack->iso_fragmentation_tx_active = false; 1054 hci_release_packet_buffer(); 1055 hci_emit_transport_packet_sent(); 1056 } 1057 1058 return status; 1059 } 1060 1061 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1062 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1063 1064 // setup data 1065 hci_stack->iso_fragmentation_total_size = size; 1066 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1067 1068 // TODO: check for space on controller 1069 // TODO: track outgoing packet sent 1070 1071 return hci_send_iso_packet_fragments(); 1072 } 1073 #endif 1074 1075 static void acl_handler(uint8_t *packet, uint16_t size){ 1076 1077 // get info 1078 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1079 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1080 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1081 uint16_t acl_length = READ_ACL_LENGTH(packet); 1082 1083 // ignore non-registered handle 1084 if (!conn){ 1085 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1086 return; 1087 } 1088 1089 // assert packet is complete 1090 if ((acl_length + 4u) != size){ 1091 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1092 return; 1093 } 1094 1095 #ifdef ENABLE_CLASSIC 1096 // update idle timestamp 1097 hci_connection_timestamp(conn); 1098 #endif 1099 1100 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1101 hci_stack->host_completed_packets = 1; 1102 conn->num_packets_completed++; 1103 #endif 1104 1105 // handle different packet types 1106 switch (acl_flags & 0x03u) { 1107 1108 case 0x01: // continuation fragment 1109 1110 // sanity checks 1111 if (conn->acl_recombination_pos == 0u) { 1112 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1113 return; 1114 } 1115 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1116 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1117 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1118 conn->acl_recombination_pos = 0; 1119 return; 1120 } 1121 1122 // append fragment payload (header already stored) 1123 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1124 &packet[4], acl_length); 1125 conn->acl_recombination_pos += acl_length; 1126 1127 // forward complete L2CAP packet if complete. 1128 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1129 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1130 // reset recombination buffer 1131 conn->acl_recombination_length = 0; 1132 conn->acl_recombination_pos = 0; 1133 } 1134 break; 1135 1136 case 0x02: { // first fragment 1137 1138 // sanity check 1139 if (conn->acl_recombination_pos) { 1140 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1141 conn->acl_recombination_pos = 0; 1142 } 1143 1144 // peek into L2CAP packet! 1145 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1146 1147 // compare fragment size to L2CAP packet size 1148 if (acl_length >= (l2cap_length + 4u)){ 1149 // forward fragment as L2CAP packet 1150 hci_emit_acl_packet(packet, acl_length + 4u); 1151 } else { 1152 1153 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1154 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1155 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1156 return; 1157 } 1158 1159 // store first fragment and tweak acl length for complete package 1160 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1161 packet, acl_length + 4u); 1162 conn->acl_recombination_pos = acl_length + 4u; 1163 conn->acl_recombination_length = l2cap_length; 1164 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1165 } 1166 break; 1167 1168 } 1169 default: 1170 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1171 return; 1172 } 1173 1174 // execute main loop 1175 hci_run(); 1176 } 1177 1178 static void hci_connection_stop_timer(hci_connection_t * conn){ 1179 btstack_run_loop_remove_timer(&conn->timeout); 1180 #ifdef ENABLE_CLASSIC 1181 btstack_run_loop_remove_timer(&conn->timeout_sco); 1182 #endif 1183 } 1184 1185 static void hci_shutdown_connection(hci_connection_t *conn){ 1186 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1187 1188 #ifdef ENABLE_CLASSIC 1189 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1190 bd_addr_type_t addr_type = conn->address_type; 1191 #endif 1192 #ifdef HAVE_SCO_TRANSPORT 1193 hci_con_handle_t con_handle = conn->con_handle; 1194 #endif 1195 #endif 1196 1197 hci_connection_stop_timer(conn); 1198 1199 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1200 btstack_memory_hci_connection_free( conn ); 1201 1202 // now it's gone 1203 hci_emit_nr_connections_changed(); 1204 1205 #ifdef ENABLE_CLASSIC 1206 #ifdef ENABLE_SCO_OVER_HCI 1207 // update SCO 1208 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1209 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1210 } 1211 #endif 1212 #ifdef HAVE_SCO_TRANSPORT 1213 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1214 hci_stack->sco_transport->close(con_handle); 1215 } 1216 #endif 1217 #endif 1218 } 1219 1220 #ifdef ENABLE_CLASSIC 1221 1222 static const uint16_t packet_type_sizes[] = { 1223 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1224 HCI_ACL_DH1_SIZE, 0, 0, 0, 1225 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1226 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1227 }; 1228 static const uint8_t packet_type_feature_requirement_bit[] = { 1229 0, // 3 slot packets 1230 1, // 5 slot packets 1231 25, // EDR 2 mpbs 1232 26, // EDR 3 mbps 1233 39, // 3 slot EDR packts 1234 40, // 5 slot EDR packet 1235 }; 1236 static const uint16_t packet_type_feature_packet_mask[] = { 1237 0x0f00, // 3 slot packets 1238 0xf000, // 5 slot packets 1239 0x1102, // EDR 2 mpbs 1240 0x2204, // EDR 3 mbps 1241 0x0300, // 3 slot EDR packts 1242 0x3000, // 5 slot EDR packet 1243 }; 1244 1245 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1246 // enable packet types based on size 1247 uint16_t packet_types = 0; 1248 unsigned int i; 1249 for (i=0;i<16;i++){ 1250 if (packet_type_sizes[i] == 0) continue; 1251 if (packet_type_sizes[i] <= buffer_size){ 1252 packet_types |= 1 << i; 1253 } 1254 } 1255 // disable packet types due to missing local supported features 1256 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1257 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1258 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1259 if (feature_set) continue; 1260 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1261 packet_types &= ~packet_type_feature_packet_mask[i]; 1262 } 1263 // flip bits for "may not be used" 1264 packet_types ^= 0x3306; 1265 return packet_types; 1266 } 1267 1268 uint16_t hci_usable_acl_packet_types(void){ 1269 return hci_stack->packet_types; 1270 } 1271 #endif 1272 1273 uint8_t* hci_get_outgoing_packet_buffer(void){ 1274 // hci packet buffer is >= acl data packet length 1275 return hci_stack->hci_packet_buffer; 1276 } 1277 1278 uint16_t hci_max_acl_data_packet_length(void){ 1279 return hci_stack->acl_data_packet_length; 1280 } 1281 1282 #ifdef ENABLE_CLASSIC 1283 bool hci_extended_sco_link_supported(void){ 1284 // No. 31, byte 3, bit 7 1285 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1286 } 1287 #endif 1288 1289 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1290 // No. 54, byte 6, bit 6 1291 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1292 } 1293 1294 #ifdef ENABLE_CLASSIC 1295 static int gap_ssp_supported(void){ 1296 // No. 51, byte 6, bit 3 1297 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1298 } 1299 #endif 1300 1301 static int hci_classic_supported(void){ 1302 #ifdef ENABLE_CLASSIC 1303 // No. 37, byte 4, bit 5, = No BR/EDR Support 1304 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1305 #else 1306 return 0; 1307 #endif 1308 } 1309 1310 static int hci_le_supported(void){ 1311 #ifdef ENABLE_BLE 1312 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1313 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1314 #else 1315 return 0; 1316 #endif 1317 } 1318 1319 static bool hci_command_supported(uint8_t command_index){ 1320 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1321 } 1322 1323 #ifdef ENABLE_BLE 1324 1325 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1326 static bool hci_extended_advertising_supported(void){ 1327 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1328 } 1329 #endif 1330 1331 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1332 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1333 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1334 } else { 1335 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1336 } 1337 } 1338 1339 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1340 *addr_type = hci_stack->le_own_addr_type; 1341 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1342 } 1343 1344 #ifdef ENABLE_LE_PERIPHERAL 1345 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1346 *addr_type = hci_stack->le_advertisements_own_addr_type; 1347 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1348 }; 1349 #endif 1350 1351 #ifdef ENABLE_LE_CENTRAL 1352 1353 /** 1354 * @brief Get own addr type and address used for LE connections (Central) 1355 */ 1356 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1357 *addr_type = hci_stack->le_connection_own_addr_type; 1358 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1359 } 1360 1361 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1362 1363 uint16_t offset = 3; 1364 uint8_t num_reports = packet[offset]; 1365 offset += 1; 1366 1367 uint16_t i; 1368 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1369 for (i=0; (i<num_reports) && (offset < size);i++){ 1370 // sanity checks on data_length: 1371 uint8_t data_length = packet[offset + 8]; 1372 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1373 if ((offset + 9u + data_length + 1u) > size) return; 1374 // setup event 1375 uint8_t event_size = 10u + data_length; 1376 uint16_t pos = 0; 1377 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1378 event[pos++] = event_size; 1379 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1380 offset += 8; 1381 pos += 8; 1382 event[pos++] = packet[offset + 1 + data_length]; // rssi 1383 event[pos++] = data_length; 1384 offset++; 1385 (void)memcpy(&event[pos], &packet[offset], data_length); 1386 pos += data_length; 1387 offset += data_length + 1u; // rssi 1388 hci_emit_event(event, pos, 1); 1389 } 1390 } 1391 1392 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1393 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1394 uint16_t offset = 3; 1395 uint8_t num_reports = packet[offset++]; 1396 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1397 uint8_t i; 1398 for (i=0; (i<num_reports) && (offset < size);i++){ 1399 // sanity checks on data_length: 1400 uint16_t data_length = packet[offset + 23]; 1401 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1402 if ((offset + 24u + data_length) > size) return; 1403 uint16_t event_type = little_endian_read_16(packet, offset); 1404 offset += 2; 1405 if ((event_type & 0x10) != 0) { 1406 // setup legacy event 1407 uint8_t legacy_event_type; 1408 switch (event_type){ 1409 case 0b0010011: 1410 // ADV_IND 1411 legacy_event_type = 0; 1412 break; 1413 case 0b0010101: 1414 // ADV_DIRECT_IND 1415 legacy_event_type = 1; 1416 break; 1417 case 0b0010010: 1418 // ADV_SCAN_IND 1419 legacy_event_type = 2; 1420 break; 1421 case 0b0010000: 1422 // ADV_NONCONN_IND 1423 legacy_event_type = 3; 1424 break; 1425 case 0b0011011: 1426 case 0b0011010: 1427 // SCAN_RSP 1428 legacy_event_type = 4; 1429 break; 1430 default: 1431 legacy_event_type = 0; 1432 break; 1433 } 1434 uint16_t pos = 0; 1435 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1436 event[pos++] = 10u + data_length; 1437 event[pos++] = legacy_event_type; 1438 // copy address type + address 1439 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1440 offset += 7; 1441 pos += 7; 1442 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1443 offset += 4; 1444 // copy rssi 1445 event[pos++] = packet[offset++]; 1446 // skip periodic advertising interval and direct address 1447 offset += 9; 1448 // copy data len + data; 1449 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1450 pos += 1 +data_length; 1451 offset += 1+ data_length; 1452 hci_emit_event(event, pos, 1); 1453 } else { 1454 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1455 uint8_t report_len = 24 + data_length; 1456 event[1] = report_len; 1457 little_endian_store_16(event, 2, event_type); 1458 memcpy(&event[4], &packet[offset], report_len); 1459 offset += report_len; 1460 hci_emit_event(event, 2 + report_len, 1); 1461 } 1462 } 1463 } 1464 #endif 1465 1466 #endif 1467 #endif 1468 1469 #ifdef ENABLE_BLE 1470 #ifdef ENABLE_LE_PERIPHERAL 1471 static void hci_update_advertisements_enabled_for_current_roles(void){ 1472 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1473 // get number of active le slave connections 1474 int num_slave_connections = 0; 1475 btstack_linked_list_iterator_t it; 1476 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1477 while (btstack_linked_list_iterator_has_next(&it)){ 1478 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1479 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1480 if (con->state != OPEN) continue; 1481 if (con->role != HCI_ROLE_SLAVE) continue; 1482 if (!hci_is_le_connection(con)) continue; 1483 num_slave_connections++; 1484 } 1485 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1486 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1487 } else { 1488 hci_stack->le_advertisements_enabled_for_current_roles = false; 1489 } 1490 } 1491 #endif 1492 #endif 1493 1494 #ifdef ENABLE_CLASSIC 1495 static void gap_run_set_local_name(void){ 1496 hci_reserve_packet_buffer(); 1497 uint8_t * packet = hci_stack->hci_packet_buffer; 1498 // construct HCI Command and send 1499 uint16_t opcode = hci_write_local_name.opcode; 1500 hci_stack->last_cmd_opcode = opcode; 1501 packet[0] = opcode & 0xff; 1502 packet[1] = opcode >> 8; 1503 packet[2] = DEVICE_NAME_LEN; 1504 memset(&packet[3], 0, DEVICE_NAME_LEN); 1505 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1506 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1507 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1508 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1509 // expand '00:00:00:00:00:00' in name with bd_addr 1510 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1511 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1512 } 1513 1514 static void gap_run_set_eir_data(void){ 1515 hci_reserve_packet_buffer(); 1516 uint8_t * packet = hci_stack->hci_packet_buffer; 1517 // construct HCI Command in-place and send 1518 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1519 hci_stack->last_cmd_opcode = opcode; 1520 uint16_t offset = 0; 1521 packet[offset++] = opcode & 0xff; 1522 packet[offset++] = opcode >> 8; 1523 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1524 packet[offset++] = 0; // FEC not required 1525 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1526 if (hci_stack->eir_data){ 1527 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1528 ad_context_t context; 1529 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1530 uint8_t data_type = ad_iterator_get_data_type(&context); 1531 uint8_t size = ad_iterator_get_data_len(&context); 1532 const uint8_t *data = ad_iterator_get_data(&context); 1533 // copy item 1534 packet[offset++] = size + 1; 1535 packet[offset++] = data_type; 1536 memcpy(&packet[offset], data, size); 1537 // update name item 1538 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1539 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1540 } 1541 offset += size; 1542 } 1543 } else { 1544 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1545 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1546 packet[offset++] = bytes_to_copy + 1; 1547 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1548 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1549 // expand '00:00:00:00:00:00' in name with bd_addr 1550 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1551 } 1552 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1553 } 1554 1555 static void hci_run_gap_tasks_classic(void){ 1556 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1557 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1558 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1559 return; 1560 } 1561 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1562 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1563 gap_run_set_local_name(); 1564 return; 1565 } 1566 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1567 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1568 gap_run_set_eir_data(); 1569 return; 1570 } 1571 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1572 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1573 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1574 return; 1575 } 1576 // write page scan activity 1577 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1578 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1579 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1580 return; 1581 } 1582 // write page scan type 1583 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1584 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1585 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1586 return; 1587 } 1588 // write page timeout 1589 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1590 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1591 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1592 return; 1593 } 1594 // send scan enable 1595 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1596 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1597 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1598 return; 1599 } 1600 // send write scan activity 1601 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1602 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1603 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1604 return; 1605 } 1606 } 1607 #endif 1608 1609 #ifndef HAVE_HOST_CONTROLLER_API 1610 1611 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1612 if (!hci_stack->config) return 0; 1613 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1614 // Limit baud rate for Broadcom chipsets to 3 mbps 1615 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1616 baud_rate = 3000000; 1617 } 1618 return baud_rate; 1619 } 1620 1621 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1622 UNUSED(ds); 1623 1624 switch (hci_stack->substate){ 1625 case HCI_INIT_W4_SEND_RESET: 1626 log_info("Resend HCI Reset"); 1627 hci_stack->substate = HCI_INIT_SEND_RESET; 1628 hci_stack->num_cmd_packets = 1; 1629 hci_run(); 1630 break; 1631 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1632 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1633 if (hci_stack->hci_transport->reset_link){ 1634 hci_stack->hci_transport->reset_link(); 1635 } 1636 1637 /* fall through */ 1638 1639 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1640 log_info("Resend HCI Reset - CSR Warm Boot"); 1641 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1642 hci_stack->num_cmd_packets = 1; 1643 hci_run(); 1644 break; 1645 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1646 if (hci_stack->hci_transport->set_baudrate){ 1647 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1648 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1649 hci_stack->hci_transport->set_baudrate(baud_rate); 1650 } 1651 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1652 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1653 if (hci_stack->hci_transport->reset_link){ 1654 log_info("Link Reset"); 1655 hci_stack->hci_transport->reset_link(); 1656 } 1657 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1658 hci_run(); 1659 } 1660 break; 1661 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1662 // otherwise continue 1663 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1664 hci_send_cmd(&hci_read_local_supported_commands); 1665 break; 1666 default: 1667 break; 1668 } 1669 } 1670 #endif 1671 1672 static void hci_initializing_next_state(void){ 1673 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1674 } 1675 1676 static void hci_init_done(void){ 1677 // done. tell the app 1678 log_info("hci_init_done -> HCI_STATE_WORKING"); 1679 hci_stack->state = HCI_STATE_WORKING; 1680 hci_emit_state(); 1681 } 1682 1683 // assumption: hci_can_send_command_packet_now() == true 1684 static void hci_initializing_run(void){ 1685 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1686 1687 if (!hci_can_send_command_packet_now()) return; 1688 1689 #ifndef HAVE_HOST_CONTROLLER_API 1690 bool need_baud_change = hci_stack->config 1691 && hci_stack->chipset 1692 && hci_stack->chipset->set_baudrate_command 1693 && hci_stack->hci_transport->set_baudrate 1694 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1695 #endif 1696 1697 switch (hci_stack->substate){ 1698 case HCI_INIT_SEND_RESET: 1699 hci_state_reset(); 1700 1701 #ifndef HAVE_HOST_CONTROLLER_API 1702 // prepare reset if command complete not received in 100ms 1703 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1704 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1705 btstack_run_loop_add_timer(&hci_stack->timeout); 1706 #endif 1707 // send command 1708 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1709 hci_send_cmd(&hci_reset); 1710 break; 1711 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1712 hci_send_cmd(&hci_read_local_version_information); 1713 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1714 break; 1715 1716 #ifndef HAVE_HOST_CONTROLLER_API 1717 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1718 hci_state_reset(); 1719 // prepare reset if command complete not received in 100ms 1720 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1721 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1722 btstack_run_loop_add_timer(&hci_stack->timeout); 1723 // send command 1724 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1725 hci_send_cmd(&hci_reset); 1726 break; 1727 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1728 hci_state_reset(); 1729 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1730 hci_send_cmd(&hci_reset); 1731 break; 1732 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1733 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1734 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1735 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1736 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1737 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1738 break; 1739 } 1740 case HCI_INIT_SET_BD_ADDR: 1741 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1742 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1743 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1744 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1745 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1746 break; 1747 case HCI_INIT_SEND_READ_LOCAL_NAME: 1748 #ifdef ENABLE_CLASSIC 1749 hci_send_cmd(&hci_read_local_name); 1750 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1751 break; 1752 #endif 1753 /* fall through */ 1754 1755 case HCI_INIT_SEND_BAUD_CHANGE: 1756 if (need_baud_change) { 1757 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1758 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1759 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1760 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1761 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1762 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1763 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1764 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1765 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1766 btstack_run_loop_add_timer(&hci_stack->timeout); 1767 } 1768 break; 1769 } 1770 1771 /* fall through */ 1772 1773 case HCI_INIT_CUSTOM_INIT: 1774 // Custom initialization 1775 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1776 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1777 bool send_cmd = false; 1778 switch (hci_stack->chipset_result){ 1779 case BTSTACK_CHIPSET_VALID_COMMAND: 1780 send_cmd = true; 1781 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1782 break; 1783 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1784 send_cmd = true; 1785 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1786 log_info("CSR Warm Boot"); 1787 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1788 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1789 btstack_run_loop_add_timer(&hci_stack->timeout); 1790 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1791 && hci_stack->config 1792 && hci_stack->chipset 1793 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1794 && hci_stack->hci_transport->set_baudrate 1795 && hci_transport_uart_get_main_baud_rate()){ 1796 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1797 } else { 1798 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1799 } 1800 break; 1801 default: 1802 break; 1803 } 1804 1805 if (send_cmd){ 1806 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1807 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1808 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1809 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1810 break; 1811 } 1812 log_info("Init script done"); 1813 1814 // Init script download on Broadcom chipsets causes: 1815 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1816 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1817 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1818 1819 // - baud rate to reset, restore UART baud rate if needed 1820 if (need_baud_change) { 1821 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1822 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1823 hci_stack->hci_transport->set_baudrate(baud_rate); 1824 } 1825 1826 uint16_t bcm_delay_ms = 300; 1827 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1828 // -> Work around: wait here. 1829 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1830 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1831 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1832 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1833 btstack_run_loop_add_timer(&hci_stack->timeout); 1834 break; 1835 } 1836 } 1837 #endif 1838 /* fall through */ 1839 1840 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1841 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1842 hci_send_cmd(&hci_read_local_supported_commands); 1843 break; 1844 case HCI_INIT_READ_BD_ADDR: 1845 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1846 hci_send_cmd(&hci_read_bd_addr); 1847 break; 1848 case HCI_INIT_READ_BUFFER_SIZE: 1849 // only read buffer size if supported 1850 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1851 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1852 hci_send_cmd(&hci_read_buffer_size); 1853 break; 1854 } 1855 1856 /* fall through */ 1857 1858 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1859 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1860 hci_send_cmd(&hci_read_local_supported_features); 1861 break; 1862 1863 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1864 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1865 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1866 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1867 break; 1868 case HCI_INIT_HOST_BUFFER_SIZE: 1869 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1870 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1871 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1872 break; 1873 #endif 1874 1875 case HCI_INIT_SET_EVENT_MASK: 1876 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1877 if (hci_le_supported()){ 1878 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1879 } else { 1880 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1881 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1882 } 1883 break; 1884 1885 case HCI_INIT_SET_EVENT_MASK_2: 1886 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2)){ 1887 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1888 // Encryption Change Event v2 - bit 25 1889 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1890 break; 1891 } 1892 1893 #ifdef ENABLE_CLASSIC 1894 /* fall through */ 1895 1896 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1897 if (hci_classic_supported() && gap_ssp_supported()){ 1898 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1899 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1900 break; 1901 } 1902 1903 /* fall through */ 1904 1905 case HCI_INIT_WRITE_INQUIRY_MODE: 1906 if (hci_classic_supported()){ 1907 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1908 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1909 break; 1910 } 1911 1912 /* fall through */ 1913 1914 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1915 // skip write secure connections host support if not supported or disabled 1916 if (hci_classic_supported() && hci_stack->secure_connections_enable 1917 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1918 hci_stack->secure_connections_active = true; 1919 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1920 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1921 break; 1922 } 1923 1924 /* fall through */ 1925 1926 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1927 // skip set min encryption key size 1928 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1929 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1930 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1931 break; 1932 } 1933 1934 #ifdef ENABLE_SCO_OVER_HCI 1935 /* fall through */ 1936 1937 // only sent if ENABLE_SCO_OVER_HCI is defined 1938 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1939 // skip write synchronous flow control if not supported 1940 if (hci_classic_supported() 1941 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1942 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1943 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1944 break; 1945 } 1946 /* fall through */ 1947 1948 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1949 // skip write default erroneous data reporting if not supported 1950 if (hci_classic_supported() 1951 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1952 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1953 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1954 break; 1955 } 1956 #endif 1957 1958 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1959 /* fall through */ 1960 1961 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1962 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1963 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1964 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1965 #ifdef ENABLE_SCO_OVER_HCI 1966 log_info("BCM: Route SCO data via HCI transport"); 1967 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1968 #endif 1969 #ifdef ENABLE_SCO_OVER_PCM 1970 log_info("BCM: Route SCO data via PCM interface"); 1971 #ifdef ENABLE_BCM_PCM_WBS 1972 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1973 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1974 #else 1975 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1976 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1977 #endif 1978 #endif 1979 break; 1980 } 1981 #endif 1982 1983 #ifdef ENABLE_SCO_OVER_PCM 1984 /* fall through */ 1985 1986 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1987 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1988 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1989 log_info("BCM: Config PCM interface for I2S"); 1990 #ifdef ENABLE_BCM_PCM_WBS 1991 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1992 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1993 #else 1994 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1995 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1996 #endif 1997 break; 1998 } 1999 #endif 2000 #endif 2001 2002 #ifdef ENABLE_BLE 2003 /* fall through */ 2004 2005 // LE INIT 2006 case HCI_INIT_LE_READ_BUFFER_SIZE: 2007 if (hci_le_supported()){ 2008 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2009 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2010 hci_send_cmd(&hci_le_read_buffer_size_v2); 2011 } else { 2012 hci_send_cmd(&hci_le_read_buffer_size); 2013 } 2014 break; 2015 } 2016 2017 /* fall through */ 2018 2019 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2020 // skip write le host if not supported (e.g. on LE only EM9301) 2021 if (hci_le_supported() 2022 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2023 // LE Supported Host = 1, Simultaneous Host = 0 2024 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2025 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2026 break; 2027 } 2028 2029 /* fall through */ 2030 2031 case HCI_INIT_LE_SET_EVENT_MASK: 2032 if (hci_le_supported()){ 2033 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2034 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2035 break; 2036 } 2037 #endif 2038 2039 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2040 /* fall through */ 2041 2042 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2043 if (hci_le_supported() 2044 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2045 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2046 hci_send_cmd(&hci_le_read_maximum_data_length); 2047 break; 2048 } 2049 2050 /* fall through */ 2051 2052 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2053 if (hci_le_supported() 2054 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2055 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2056 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2057 break; 2058 } 2059 #endif 2060 2061 #ifdef ENABLE_LE_CENTRAL 2062 /* fall through */ 2063 2064 case HCI_INIT_READ_WHITE_LIST_SIZE: 2065 if (hci_le_supported()){ 2066 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2067 hci_send_cmd(&hci_le_read_white_list_size); 2068 break; 2069 } 2070 2071 #endif 2072 2073 #ifdef ENABLE_LE_PERIPHERAL 2074 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2075 /* fall through */ 2076 2077 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2078 if (hci_extended_advertising_supported()){ 2079 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2080 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2081 break; 2082 } 2083 #endif 2084 #endif 2085 /* fall through */ 2086 2087 case HCI_INIT_DONE: 2088 hci_stack->substate = HCI_INIT_DONE; 2089 // main init sequence complete 2090 #ifdef ENABLE_CLASSIC 2091 // check if initial Classic GAP Tasks are completed 2092 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2093 hci_run_gap_tasks_classic(); 2094 break; 2095 } 2096 #endif 2097 #ifdef ENABLE_BLE 2098 #ifdef ENABLE_LE_CENTRAL 2099 // check if initial LE GAP Tasks are completed 2100 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2101 hci_run_general_gap_le(); 2102 break; 2103 } 2104 #endif 2105 #endif 2106 hci_init_done(); 2107 break; 2108 2109 default: 2110 return; 2111 } 2112 } 2113 2114 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2115 bool command_completed = false; 2116 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2117 uint16_t opcode = little_endian_read_16(packet,3); 2118 if (opcode == hci_stack->last_cmd_opcode){ 2119 command_completed = true; 2120 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2121 } else { 2122 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2123 } 2124 } 2125 2126 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2127 uint8_t status = packet[2]; 2128 uint16_t opcode = little_endian_read_16(packet,4); 2129 if (opcode == hci_stack->last_cmd_opcode){ 2130 if (status){ 2131 command_completed = true; 2132 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2133 } else { 2134 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2135 } 2136 } else { 2137 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2138 } 2139 } 2140 #ifndef HAVE_HOST_CONTROLLER_API 2141 // Vendor == CSR 2142 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2143 // TODO: track actual command 2144 command_completed = true; 2145 } 2146 2147 // Vendor == Toshiba 2148 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2149 // TODO: track actual command 2150 command_completed = true; 2151 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2152 hci_stack->num_cmd_packets = 1; 2153 } 2154 #endif 2155 2156 return command_completed; 2157 } 2158 2159 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2160 2161 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2162 2163 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2164 2165 #ifndef HAVE_HOST_CONTROLLER_API 2166 2167 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2168 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2169 // 2170 // HCI Reset 2171 // Timeout 100 ms 2172 // HCI Reset 2173 // Command Complete Reset 2174 // HCI Read Local Version Information 2175 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2176 // hang... 2177 // 2178 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2179 if (!command_completed 2180 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2181 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2182 2183 uint16_t opcode = little_endian_read_16(packet,3); 2184 if (opcode == hci_reset.opcode){ 2185 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2186 return; 2187 } 2188 } 2189 2190 // CSR & H5 2191 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2192 if (!command_completed 2193 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2194 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2195 2196 uint16_t opcode = little_endian_read_16(packet,3); 2197 if (opcode == hci_reset.opcode){ 2198 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2199 return; 2200 } 2201 } 2202 2203 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2204 // fix: Correct substate and behave as command below 2205 if (command_completed){ 2206 switch (hci_stack->substate){ 2207 case HCI_INIT_SEND_RESET: 2208 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2209 break; 2210 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2211 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2212 break; 2213 default: 2214 break; 2215 } 2216 } 2217 2218 #endif 2219 2220 if (!command_completed) return; 2221 2222 bool need_baud_change = false; 2223 bool need_addr_change = false; 2224 2225 #ifndef HAVE_HOST_CONTROLLER_API 2226 need_baud_change = hci_stack->config 2227 && hci_stack->chipset 2228 && hci_stack->chipset->set_baudrate_command 2229 && hci_stack->hci_transport->set_baudrate 2230 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2231 2232 need_addr_change = hci_stack->custom_bd_addr_set 2233 && hci_stack->chipset 2234 && hci_stack->chipset->set_bd_addr_command; 2235 #endif 2236 2237 switch(hci_stack->substate){ 2238 2239 #ifndef HAVE_HOST_CONTROLLER_API 2240 case HCI_INIT_SEND_RESET: 2241 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2242 // fix: just correct substate and behave as command below 2243 2244 /* fall through */ 2245 #endif 2246 2247 case HCI_INIT_W4_SEND_RESET: 2248 btstack_run_loop_remove_timer(&hci_stack->timeout); 2249 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2250 return; 2251 2252 #ifndef HAVE_HOST_CONTROLLER_API 2253 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2254 // for STLC2500D, baud rate change already happened. 2255 // for others, baud rate gets changed now 2256 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2257 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2258 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2259 hci_stack->hci_transport->set_baudrate(baud_rate); 2260 } 2261 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2262 return; 2263 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2264 btstack_run_loop_remove_timer(&hci_stack->timeout); 2265 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2266 return; 2267 case HCI_INIT_W4_CUSTOM_INIT: 2268 // repeat custom init 2269 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2270 return; 2271 #endif 2272 2273 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2274 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2275 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2276 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2277 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2278 return; 2279 } 2280 if (need_addr_change){ 2281 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2282 return; 2283 } 2284 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2285 return; 2286 #ifndef HAVE_HOST_CONTROLLER_API 2287 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2288 if (need_baud_change){ 2289 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2290 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2291 hci_stack->hci_transport->set_baudrate(baud_rate); 2292 } 2293 if (need_addr_change){ 2294 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2295 return; 2296 } 2297 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2298 return; 2299 case HCI_INIT_W4_SET_BD_ADDR: 2300 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2301 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2302 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2303 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2304 return; 2305 } 2306 // skipping st warm boot 2307 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2308 return; 2309 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2310 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2311 return; 2312 #endif 2313 2314 case HCI_INIT_DONE: 2315 // set state if we came here by fall through 2316 hci_stack->substate = HCI_INIT_DONE; 2317 return; 2318 2319 default: 2320 break; 2321 } 2322 hci_initializing_next_state(); 2323 } 2324 2325 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2326 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2327 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2328 // check if we have been aware of the HCI connection 2329 switch (conn->state){ 2330 case SENT_CREATE_CONNECTION: 2331 case RECEIVED_CONNECTION_REQUEST: 2332 break; 2333 default: 2334 return; 2335 } 2336 2337 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2338 bd_addr_t bd_address; 2339 (void)memcpy(&bd_address, conn->address, 6); 2340 2341 #ifdef ENABLE_CLASSIC 2342 // cache needed data 2343 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2344 #endif 2345 2346 // connection failed, remove entry 2347 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2348 btstack_memory_hci_connection_free( conn ); 2349 2350 #ifdef ENABLE_CLASSIC 2351 // notify client if dedicated bonding 2352 if (notify_dedicated_bonding_failed){ 2353 log_info("hci notify_dedicated_bonding_failed"); 2354 hci_emit_dedicated_bonding_result(bd_address, status); 2355 } 2356 2357 // if authentication error, also delete link key 2358 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2359 gap_drop_link_key_for_bd_addr(bd_address); 2360 } 2361 #else 2362 UNUSED(status); 2363 #endif 2364 } 2365 2366 #ifdef ENABLE_CLASSIC 2367 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2368 // SSP Controller 2369 if (features[6] & (1 << 3)){ 2370 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2371 } 2372 // eSCO 2373 if (features[3] & (1<<7)){ 2374 conn->remote_supported_features[0] |= 1; 2375 } 2376 // Extended features 2377 if (features[7] & (1<<7)){ 2378 conn->remote_supported_features[0] |= 2; 2379 } 2380 } 2381 2382 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2383 // SSP Host 2384 if (features[0] & (1 << 0)){ 2385 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2386 } 2387 // SC Host 2388 if (features[0] & (1 << 3)){ 2389 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2390 } 2391 } 2392 2393 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2394 // SC Controller 2395 if (features[1] & (1 << 0)){ 2396 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2397 } 2398 } 2399 2400 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2401 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2402 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2403 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2404 if (conn->bonding_flags & BONDING_DEDICATED){ 2405 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2406 } 2407 } 2408 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2409 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2410 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2411 } 2412 2413 #endif 2414 2415 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2416 // handle BT initialization 2417 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2418 hci_initializing_event_handler(packet, size); 2419 } 2420 2421 // help with BT sleep 2422 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2423 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2424 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2425 hci_initializing_next_state(); 2426 } 2427 } 2428 2429 #ifdef ENABLE_CLASSIC 2430 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2431 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2432 conn->encryption_key_size = encryption_key_size; 2433 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2434 2435 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2436 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2437 conn->bonding_flags &= ~BONDING_DEDICATED; 2438 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2439 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2440 return; 2441 } 2442 2443 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2444 conn->requested_security_level = LEVEL_0; 2445 hci_emit_security_level(conn->con_handle, security_level); 2446 return; 2447 } 2448 2449 // Request remote features if not already done 2450 hci_trigger_remote_features_for_connection(conn); 2451 2452 // Request Authentication if not already done 2453 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2454 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2455 } 2456 #endif 2457 2458 static void hci_store_local_supported_commands(const uint8_t * packet){ 2459 // create mapping table 2460 #define X(name, offset, bit) { offset, bit }, 2461 static struct { 2462 uint8_t byte_offset; 2463 uint8_t bit_position; 2464 } supported_hci_commands_map [] = { 2465 SUPPORTED_HCI_COMMANDS 2466 }; 2467 #undef X 2468 2469 // create names for debug purposes 2470 #ifdef ENABLE_LOG_DEBUG 2471 #define X(name, offset, bit) #name, 2472 static const char * command_names[] = { 2473 SUPPORTED_HCI_COMMANDS 2474 }; 2475 #undef X 2476 #endif 2477 2478 hci_stack->local_supported_commands = 0; 2479 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2480 uint16_t i; 2481 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2482 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2483 #ifdef ENABLE_LOG_DEBUG 2484 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); 2485 #else 2486 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2487 #endif 2488 hci_stack->local_supported_commands |= (1LU << i); 2489 } 2490 } 2491 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2492 } 2493 2494 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2495 UNUSED(size); 2496 2497 uint16_t manufacturer; 2498 #ifdef ENABLE_CLASSIC 2499 hci_con_handle_t handle; 2500 hci_connection_t * conn; 2501 uint8_t status; 2502 #endif 2503 // get num cmd packets - limit to 1 to reduce complexity 2504 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2505 2506 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2507 switch (opcode){ 2508 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2509 if (packet[5]) break; 2510 // terminate, name 248 chars 2511 packet[6+248] = 0; 2512 log_info("local name: %s", &packet[6]); 2513 break; 2514 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2515 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2516 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2517 uint16_t acl_len = little_endian_read_16(packet, 6); 2518 uint16_t sco_len = packet[8]; 2519 2520 // determine usable ACL/SCO payload size 2521 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2522 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2523 2524 hci_stack->acl_packets_total_num = (uint8_t) little_endian_read_16(packet, 9); 2525 hci_stack->sco_packets_total_num = (uint8_t) little_endian_read_16(packet, 11); 2526 2527 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2528 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2529 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2530 } 2531 break; 2532 case HCI_OPCODE_HCI_READ_RSSI: 2533 if (packet[5] == ERROR_CODE_SUCCESS){ 2534 uint8_t event[5]; 2535 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2536 event[1] = 3; 2537 (void)memcpy(&event[2], &packet[6], 3); 2538 hci_emit_event(event, sizeof(event), 1); 2539 } 2540 break; 2541 #ifdef ENABLE_BLE 2542 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2543 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2544 hci_stack->le_iso_packets_total_num = packet[11]; 2545 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2546 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2547 2548 /* fall through */ 2549 2550 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2551 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2552 hci_stack->le_acl_packets_total_num = packet[8]; 2553 // determine usable ACL payload size 2554 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2555 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2556 } 2557 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); 2558 break; 2559 #endif 2560 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2561 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2562 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2563 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2564 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); 2565 break; 2566 #endif 2567 #ifdef ENABLE_LE_CENTRAL 2568 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2569 hci_stack->le_whitelist_capacity = packet[6]; 2570 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2571 break; 2572 #endif 2573 #ifdef ENABLE_LE_PERIPHERAL 2574 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2575 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2576 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2577 break; 2578 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2579 if (hci_stack->le_advertising_set_in_current_command != 0) { 2580 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2581 hci_stack->le_advertising_set_in_current_command = 0; 2582 if (advertising_set == NULL) break; 2583 uint8_t adv_status = packet[6]; 2584 uint8_t tx_power = packet[7]; 2585 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 }; 2586 if (adv_status == 0){ 2587 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2588 } 2589 hci_emit_event(event, sizeof(event), 1); 2590 } 2591 break; 2592 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2593 if (hci_stack->le_advertising_set_in_current_command != 0) { 2594 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2595 hci_stack->le_advertising_set_in_current_command = 0; 2596 if (advertising_set == NULL) break; 2597 uint8_t adv_status = packet[5]; 2598 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2599 if (adv_status == 0){ 2600 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2601 } 2602 hci_emit_event(event, sizeof(event), 1); 2603 } 2604 break; 2605 #endif 2606 #endif 2607 case HCI_OPCODE_HCI_READ_BD_ADDR: 2608 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2609 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)); 2610 #ifdef ENABLE_CLASSIC 2611 if (hci_stack->link_key_db){ 2612 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2613 } 2614 #endif 2615 break; 2616 #ifdef ENABLE_CLASSIC 2617 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2618 hci_emit_discoverable_enabled(hci_stack->discoverable); 2619 break; 2620 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2621 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2622 if (status == ERROR_CODE_SUCCESS) { 2623 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2624 } else { 2625 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2626 } 2627 break; 2628 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2629 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2630 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2631 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2632 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2633 hci_emit_event(event, sizeof(event), 1); 2634 } 2635 break; 2636 #endif 2637 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2638 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2639 2640 #ifdef ENABLE_CLASSIC 2641 // determine usable ACL packet types based on host buffer size and supported features 2642 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2643 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2644 #endif 2645 // Classic/LE 2646 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2647 break; 2648 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2649 manufacturer = little_endian_read_16(packet, 10); 2650 // map Cypress to Broadcom 2651 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2652 log_info("Treat Cypress as Broadcom"); 2653 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2654 little_endian_store_16(packet, 10, manufacturer); 2655 } 2656 hci_stack->manufacturer = manufacturer; 2657 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2658 break; 2659 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2660 hci_store_local_supported_commands(packet); 2661 break; 2662 #ifdef ENABLE_CLASSIC 2663 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2664 if (packet[5]) return; 2665 hci_stack->synchronous_flow_control_enabled = 1; 2666 break; 2667 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2668 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2669 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2670 conn = hci_connection_for_handle(handle); 2671 if (conn != NULL) { 2672 uint8_t key_size = 0; 2673 if (status == 0){ 2674 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2675 log_info("Handle %04x key Size: %u", handle, key_size); 2676 } else { 2677 key_size = 1; 2678 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2679 } 2680 hci_handle_read_encryption_key_size_complete(conn, key_size); 2681 } 2682 break; 2683 // assert pairing complete event is emitted. 2684 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2685 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2686 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2687 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2688 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2689 // lookup connection by gap pairing addr 2690 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2691 if (conn == NULL) break; 2692 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2693 break; 2694 2695 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2696 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2697 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2698 uint8_t event[67]; 2699 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2700 event[1] = 65; 2701 (void)memset(&event[2], 0, 65); 2702 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2703 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2704 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2705 event[2] = 3; 2706 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2707 } else { 2708 event[2] = 1; 2709 } 2710 } 2711 hci_emit_event(event, sizeof(event), 0); 2712 break; 2713 } 2714 2715 // note: only needed if user does not provide OOB data 2716 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2717 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2718 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2719 if (conn == NULL) break; 2720 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2721 break; 2722 #endif 2723 #endif 2724 #ifdef ENABLE_BLE 2725 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2726 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2727 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2728 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2729 if (status != ERROR_CODE_SUCCESS){ 2730 hci_iso_stream_requested_finalize(); 2731 } 2732 break; 2733 #endif 2734 #endif 2735 default: 2736 break; 2737 } 2738 } 2739 2740 #ifdef ENABLE_BLE 2741 static void event_handle_le_connection_complete(const uint8_t * packet){ 2742 bd_addr_t addr; 2743 bd_addr_type_t addr_type; 2744 hci_connection_t * conn; 2745 2746 // Connection management 2747 reverse_bd_addr(&packet[8], addr); 2748 addr_type = (bd_addr_type_t)packet[7]; 2749 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2750 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2751 2752 #ifdef ENABLE_LE_CENTRAL 2753 // handle error: error is reported only to the initiator -> outgoing connection 2754 if (packet[3]){ 2755 2756 // handle cancelled outgoing connection 2757 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2758 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2759 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2760 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2761 // reset state 2762 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2763 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2764 // get outgoing connection conn struct for direct connect 2765 conn = gap_get_outgoing_connection(); 2766 } 2767 2768 // outgoing le connection establishment is done 2769 if (conn){ 2770 // remove entry 2771 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2772 btstack_memory_hci_connection_free( conn ); 2773 } 2774 return; 2775 } 2776 #endif 2777 2778 // on success, both hosts receive connection complete event 2779 if (packet[6] == HCI_ROLE_MASTER){ 2780 #ifdef ENABLE_LE_CENTRAL 2781 // if we're master on an le connection, it was an outgoing connection and we're done with it 2782 // note: no hci_connection_t object exists yet for connect with whitelist 2783 if (hci_is_le_connection_type(addr_type)){ 2784 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2785 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2786 } 2787 #endif 2788 } else { 2789 #ifdef ENABLE_LE_PERIPHERAL 2790 // if we're slave, it was an incoming connection, advertisements have stopped 2791 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2792 #endif 2793 } 2794 2795 // LE connections are auto-accepted, so just create a connection if there isn't one already 2796 if (!conn){ 2797 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2798 } 2799 2800 // no memory, sorry. 2801 if (!conn){ 2802 return; 2803 } 2804 2805 conn->state = OPEN; 2806 conn->role = packet[6]; 2807 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2808 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2809 2810 #ifdef ENABLE_LE_PERIPHERAL 2811 if (packet[6] == HCI_ROLE_SLAVE){ 2812 hci_update_advertisements_enabled_for_current_roles(); 2813 } 2814 #endif 2815 2816 // init unenhanced att bearer mtu 2817 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2818 conn->att_connection.mtu_exchanged = false; 2819 2820 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2821 2822 // restart timer 2823 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2824 // btstack_run_loop_add_timer(&conn->timeout); 2825 2826 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2827 2828 hci_emit_nr_connections_changed(); 2829 } 2830 #endif 2831 2832 #ifdef ENABLE_CLASSIC 2833 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){ 2834 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2835 // LEVEL_4 is tested by l2cap 2836 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2837 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2838 if (level >= LEVEL_3){ 2839 // MITM not possible without keyboard or display 2840 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2841 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2842 2843 // MITM possible if one side has keyboard and the other has keyboard or display 2844 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2845 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2846 2847 // MITM not possible if one side has only display and other side has no keyboard 2848 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2849 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2850 } 2851 // LEVEL 2 requires SSP, which is a given 2852 return true; 2853 } 2854 2855 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2856 uint16_t i; 2857 for (i=0; i < size ; i++){ 2858 if (data[i] != 0) { 2859 return false; 2860 } 2861 } 2862 return true; 2863 } 2864 2865 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2866 // get requested security level 2867 gap_security_level_t requested_security_level = conn->requested_security_level; 2868 if (hci_stack->gap_secure_connections_only_mode){ 2869 requested_security_level = LEVEL_4; 2870 } 2871 2872 // assess security: LEVEL 4 requires SC 2873 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2874 if ((requested_security_level == LEVEL_4) && 2875 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2876 !hci_remote_sc_enabled(conn)){ 2877 log_info("Level 4 required, but SC not supported -> abort"); 2878 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2879 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2880 return; 2881 } 2882 2883 // assess security based on io capabilities 2884 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2885 // responder: fully validate io caps of both sides as well as OOB data 2886 bool security_possible = false; 2887 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2888 2889 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2890 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2891 // so we merge the OOB data availability 2892 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2893 if (conn->classic_oob_c_192 != NULL){ 2894 have_oob_data |= 1; 2895 } 2896 if (conn->classic_oob_c_256 != NULL){ 2897 have_oob_data |= 2; 2898 } 2899 // for up to Level 3, either P-192 as well as P-256 will do 2900 // 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 2901 // if remote does not SC, we should not receive P-256 data either 2902 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2903 security_possible = true; 2904 } 2905 // for Level 4, P-256 is needed 2906 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2907 security_possible = true; 2908 } 2909 #endif 2910 2911 if (security_possible == false){ 2912 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2913 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2914 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2915 return; 2916 } 2917 } else { 2918 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2919 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2920 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2921 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2922 log_info("Level 3+ required, but no input/output -> abort"); 2923 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2924 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2925 return; 2926 } 2927 #endif 2928 #endif 2929 } 2930 2931 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2932 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2933 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2934 } else { 2935 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2936 } 2937 #endif 2938 } 2939 2940 #endif 2941 2942 static void event_handler(uint8_t *packet, uint16_t size){ 2943 2944 uint16_t event_length = packet[1]; 2945 2946 // assert packet is complete 2947 if (size != (event_length + 2u)){ 2948 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2949 return; 2950 } 2951 2952 bd_addr_type_t addr_type; 2953 hci_con_handle_t handle; 2954 hci_connection_t * conn; 2955 int i; 2956 int create_connection_cmd; 2957 2958 #ifdef ENABLE_CLASSIC 2959 hci_link_type_t link_type; 2960 bd_addr_t addr; 2961 #endif 2962 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2963 hci_iso_stream_t * iso_stream; 2964 #endif 2965 2966 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2967 2968 switch (hci_event_packet_get_type(packet)) { 2969 2970 case HCI_EVENT_COMMAND_COMPLETE: 2971 handle_command_complete_event(packet, size); 2972 break; 2973 2974 case HCI_EVENT_COMMAND_STATUS: 2975 // get num cmd packets - limit to 1 to reduce complexity 2976 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2977 2978 // check command status to detected failed outgoing connections 2979 create_connection_cmd = 0; 2980 #ifdef ENABLE_CLASSIC 2981 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2982 create_connection_cmd = 1; 2983 } 2984 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2985 create_connection_cmd = 1; 2986 } 2987 #endif 2988 #ifdef ENABLE_LE_CENTRAL 2989 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2990 create_connection_cmd = 1; 2991 } 2992 #endif 2993 if (create_connection_cmd) { 2994 uint8_t status = hci_event_command_status_get_status(packet); 2995 addr_type = hci_stack->outgoing_addr_type; 2996 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2997 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2998 2999 // reset outgoing address info 3000 memset(hci_stack->outgoing_addr, 0, 6); 3001 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 3002 3003 // on error 3004 if (status != ERROR_CODE_SUCCESS){ 3005 #ifdef ENABLE_LE_CENTRAL 3006 if (hci_is_le_connection_type(addr_type)){ 3007 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3008 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3009 } 3010 #endif 3011 // error => outgoing connection failed 3012 if (conn != NULL){ 3013 hci_handle_connection_failed(conn, status); 3014 } 3015 } 3016 } 3017 3018 #ifdef ENABLE_CLASSIC 3019 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)){ 3020 uint8_t status = hci_event_command_status_get_status(packet); 3021 log_info("command status (inquiry), status %x", status); 3022 if (status == ERROR_CODE_SUCCESS) { 3023 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3024 } else { 3025 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3026 } 3027 } 3028 #endif /* ENABLE_CLASSIC */ 3029 #ifdef ENABLE_BLE 3030 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3031 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_cis) || HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_accept_cis_request)){ 3032 uint8_t status = hci_event_command_status_get_status(packet); 3033 if (status == ERROR_CODE_SUCCESS){ 3034 hci_iso_stream_requested_confirm(); 3035 } else { 3036 hci_iso_stream_requested_finalize(); 3037 } 3038 } 3039 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 3040 #endif /* ENABLE_BLE */ 3041 break; 3042 3043 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3044 if (size < 3) return; 3045 uint16_t num_handles = packet[2]; 3046 if (size != (3u + num_handles * 4u)) return; 3047 uint16_t offset = 3; 3048 for (i=0; i<num_handles;i++){ 3049 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3050 offset += 2u; 3051 uint16_t num_packets = little_endian_read_16(packet, offset); 3052 offset += 2u; 3053 3054 conn = hci_connection_for_handle(handle); 3055 if (!conn){ 3056 log_error("hci_number_completed_packet lists unused con handle %u", handle); 3057 continue; 3058 } 3059 3060 if (conn->num_packets_sent >= num_packets){ 3061 conn->num_packets_sent -= num_packets; 3062 } else { 3063 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3064 conn->num_packets_sent = 0; 3065 } 3066 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3067 3068 #ifdef ENABLE_CLASSIC 3069 // For SCO, we do the can_send_now_check here 3070 hci_notify_if_sco_can_send_now(); 3071 #endif 3072 } 3073 break; 3074 } 3075 3076 #ifdef ENABLE_CLASSIC 3077 case HCI_EVENT_FLUSH_OCCURRED: 3078 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3079 handle = hci_event_flush_occurred_get_handle(packet); 3080 conn = hci_connection_for_handle(handle); 3081 if (conn) { 3082 log_info("Flush occurred, disconnect 0x%04x", handle); 3083 conn->state = SEND_DISCONNECT; 3084 } 3085 break; 3086 3087 case HCI_EVENT_INQUIRY_COMPLETE: 3088 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3089 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3090 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3091 hci_emit_event(event, sizeof(event), 1); 3092 } 3093 break; 3094 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3095 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3096 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3097 } 3098 break; 3099 case HCI_EVENT_CONNECTION_REQUEST: 3100 reverse_bd_addr(&packet[2], addr); 3101 link_type = (hci_link_type_t) packet[11]; 3102 3103 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3104 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3105 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3106 bd_addr_copy(hci_stack->decline_addr, addr); 3107 break; 3108 } 3109 3110 if (hci_stack->gap_classic_accept_callback != NULL){ 3111 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3112 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3113 bd_addr_copy(hci_stack->decline_addr, addr); 3114 break; 3115 } 3116 } 3117 3118 // TODO: eval COD 8-10 3119 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3120 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3121 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3122 if (!conn) { 3123 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3124 } 3125 if (!conn) { 3126 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3127 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3128 bd_addr_copy(hci_stack->decline_addr, addr); 3129 hci_run(); 3130 // avoid event to higher layer 3131 return; 3132 } 3133 conn->role = HCI_ROLE_SLAVE; 3134 conn->state = RECEIVED_CONNECTION_REQUEST; 3135 // store info about eSCO 3136 if (link_type == HCI_LINK_TYPE_ESCO){ 3137 conn->remote_supported_features[0] |= 1; 3138 } 3139 hci_run(); 3140 break; 3141 3142 case HCI_EVENT_CONNECTION_COMPLETE: 3143 // Connection management 3144 reverse_bd_addr(&packet[5], addr); 3145 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3146 addr_type = BD_ADDR_TYPE_ACL; 3147 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3148 if (conn) { 3149 if (!packet[2]){ 3150 conn->state = OPEN; 3151 conn->con_handle = little_endian_read_16(packet, 3); 3152 3153 // trigger write supervision timeout if we're master 3154 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3155 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3156 } 3157 3158 // trigger write automatic flush timeout 3159 if (hci_stack->automatic_flush_timeout != 0){ 3160 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3161 } 3162 3163 // restart timer 3164 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3165 btstack_run_loop_add_timer(&conn->timeout); 3166 3167 // trigger remote features for dedicated bonding 3168 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3169 hci_trigger_remote_features_for_connection(conn); 3170 } 3171 3172 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3173 3174 hci_emit_nr_connections_changed(); 3175 } else { 3176 // connection failed 3177 hci_handle_connection_failed(conn, packet[2]); 3178 } 3179 } 3180 break; 3181 3182 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3183 reverse_bd_addr(&packet[5], addr); 3184 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3185 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3186 if (packet[2]){ 3187 // connection failed 3188 if (conn){ 3189 hci_handle_connection_failed(conn, packet[2]); 3190 } 3191 break; 3192 } 3193 if (!conn) { 3194 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3195 } 3196 if (!conn) { 3197 break; 3198 } 3199 conn->state = OPEN; 3200 conn->con_handle = little_endian_read_16(packet, 3); 3201 3202 #ifdef ENABLE_SCO_OVER_HCI 3203 // update SCO 3204 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3205 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3206 } 3207 // trigger can send now 3208 if (hci_have_usb_transport()){ 3209 hci_stack->sco_can_send_now = true; 3210 } 3211 #endif 3212 #ifdef HAVE_SCO_TRANSPORT 3213 // configure sco transport 3214 if (hci_stack->sco_transport != NULL){ 3215 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3216 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3217 } 3218 #endif 3219 break; 3220 3221 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3222 handle = little_endian_read_16(packet, 3); 3223 conn = hci_connection_for_handle(handle); 3224 if (!conn) break; 3225 if (!packet[2]){ 3226 const uint8_t * features = &packet[5]; 3227 hci_handle_remote_features_page_0(conn, features); 3228 3229 // read extended features if possible 3230 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3231 && ((conn->remote_supported_features[0] & 2) != 0)) { 3232 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3233 break; 3234 } 3235 } 3236 hci_handle_remote_features_received(conn); 3237 break; 3238 3239 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3240 handle = little_endian_read_16(packet, 3); 3241 conn = hci_connection_for_handle(handle); 3242 if (!conn) break; 3243 // status = ok, page = 1 3244 if (!packet[2]) { 3245 uint8_t page_number = packet[5]; 3246 uint8_t maximum_page_number = packet[6]; 3247 const uint8_t * features = &packet[7]; 3248 bool done = false; 3249 switch (page_number){ 3250 case 1: 3251 hci_handle_remote_features_page_1(conn, features); 3252 if (maximum_page_number >= 2){ 3253 // get Secure Connections (Controller) from Page 2 if available 3254 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3255 } else { 3256 // otherwise, assume SC (Controller) == SC (Host) 3257 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3258 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3259 } 3260 done = true; 3261 } 3262 break; 3263 case 2: 3264 hci_handle_remote_features_page_2(conn, features); 3265 done = true; 3266 break; 3267 default: 3268 break; 3269 } 3270 if (!done) break; 3271 } 3272 hci_handle_remote_features_received(conn); 3273 break; 3274 3275 case HCI_EVENT_LINK_KEY_REQUEST: 3276 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3277 hci_event_link_key_request_get_bd_addr(packet, addr); 3278 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3279 if (!conn) break; 3280 3281 // lookup link key in db if not cached 3282 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3283 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3284 } 3285 3286 // response sent by hci_run() 3287 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3288 #endif 3289 break; 3290 3291 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3292 hci_event_link_key_request_get_bd_addr(packet, addr); 3293 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3294 if (!conn) break; 3295 3296 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3297 3298 // CVE-2020-26555: ignore NULL link key 3299 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3300 if (btstack_is_null(&packet[8], 16)) break; 3301 3302 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3303 // Change Connection Encryption keeps link key type 3304 if (link_key_type != CHANGED_COMBINATION_KEY){ 3305 conn->link_key_type = link_key_type; 3306 } 3307 3308 // cache link key. link keys stored in little-endian format for legacy reasons 3309 memcpy(&conn->link_key, &packet[8], 16); 3310 3311 // only store link key: 3312 // - if bondable enabled 3313 if (hci_stack->bondable == false) break; 3314 // - if security level sufficient 3315 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3316 // - for SSP, also check if remote side requested bonding as well 3317 if (conn->link_key_type != COMBINATION_KEY){ 3318 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3319 if (!remote_bonding){ 3320 break; 3321 } 3322 } 3323 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3324 break; 3325 } 3326 3327 case HCI_EVENT_PIN_CODE_REQUEST: 3328 hci_event_pin_code_request_get_bd_addr(packet, addr); 3329 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3330 if (!conn) break; 3331 3332 hci_pairing_started(conn, false); 3333 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3334 if (!hci_stack->bondable ){ 3335 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3336 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3337 hci_run(); 3338 return; 3339 } 3340 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3341 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3342 log_info("Level 4 required, but SC not supported -> abort"); 3343 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3344 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3345 hci_run(); 3346 return; 3347 } 3348 break; 3349 3350 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3351 hci_event_io_capability_response_get_bd_addr(packet, addr); 3352 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3353 if (!conn) break; 3354 3355 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3356 hci_pairing_started(conn, true); 3357 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3358 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3359 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3360 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3361 #endif 3362 break; 3363 3364 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3365 hci_event_io_capability_response_get_bd_addr(packet, addr); 3366 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3367 if (!conn) break; 3368 3369 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3370 hci_connection_timestamp(conn); 3371 hci_pairing_started(conn, true); 3372 break; 3373 3374 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3375 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3376 hci_event_remote_oob_data_request_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_connection_timestamp(conn); 3381 3382 hci_pairing_started(conn, true); 3383 3384 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3385 break; 3386 #endif 3387 3388 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3389 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3390 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3391 if (!conn) break; 3392 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3393 if (hci_stack->ssp_auto_accept){ 3394 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3395 }; 3396 } else { 3397 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3398 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3399 // don't forward event to app 3400 hci_run(); 3401 return; 3402 } 3403 break; 3404 3405 case HCI_EVENT_USER_PASSKEY_REQUEST: 3406 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3407 if (hci_stack->ssp_auto_accept){ 3408 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3409 }; 3410 break; 3411 3412 case HCI_EVENT_MODE_CHANGE: 3413 handle = hci_event_mode_change_get_handle(packet); 3414 conn = hci_connection_for_handle(handle); 3415 if (!conn) break; 3416 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3417 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3418 break; 3419 #endif 3420 3421 case HCI_EVENT_ENCRYPTION_CHANGE: 3422 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3423 handle = hci_event_encryption_change_get_connection_handle(packet); 3424 conn = hci_connection_for_handle(handle); 3425 if (!conn) break; 3426 if (hci_event_encryption_change_get_status(packet) == 0u) { 3427 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3428 if (encryption_enabled){ 3429 if (hci_is_le_connection(conn)){ 3430 // For LE, we accept connection as encrypted 3431 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3432 } 3433 #ifdef ENABLE_CLASSIC 3434 else { 3435 3436 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3437 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3438 bool connected_uses_aes_ccm = encryption_enabled == 2; 3439 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3440 log_info("SC during pairing, but only E0 now -> abort"); 3441 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3442 break; 3443 } 3444 3445 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3446 if (connected_uses_aes_ccm){ 3447 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3448 } 3449 3450 #ifdef ENABLE_TESTING_SUPPORT 3451 // work around for issue with PTS dongle 3452 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3453 #endif 3454 // validate encryption key size 3455 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3456 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3457 // already got encryption key size 3458 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3459 } else { 3460 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3461 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3462 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3463 } else { 3464 // if not, pretend everything is perfect 3465 hci_handle_read_encryption_key_size_complete(conn, 16); 3466 } 3467 } 3468 } 3469 #endif 3470 } else { 3471 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3472 } 3473 } else { 3474 uint8_t status = hci_event_encryption_change_get_status(packet); 3475 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3476 conn->bonding_flags &= ~BONDING_DEDICATED; 3477 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3478 conn->bonding_status = status; 3479 } 3480 } 3481 3482 break; 3483 3484 #ifdef ENABLE_CLASSIC 3485 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3486 handle = hci_event_authentication_complete_get_connection_handle(packet); 3487 conn = hci_connection_for_handle(handle); 3488 if (!conn) break; 3489 3490 // clear authentication active flag 3491 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3492 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3493 3494 // authenticated only if auth status == 0 3495 if (hci_event_authentication_complete_get_status(packet) == 0){ 3496 // authenticated 3497 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3498 3499 // If not already encrypted, start encryption 3500 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3501 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3502 break; 3503 } 3504 } 3505 3506 // emit updated security level 3507 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3508 break; 3509 3510 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3511 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3512 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3513 if (!conn) break; 3514 3515 // treat successfully paired connection as authenticated 3516 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3517 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3518 } 3519 3520 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3521 break; 3522 #endif 3523 3524 // HCI_EVENT_DISCONNECTION_COMPLETE 3525 // has been split, to first notify stack before shutting connection down 3526 // see end of function, too. 3527 case HCI_EVENT_DISCONNECTION_COMPLETE: 3528 if (packet[2]) break; // status != 0 3529 handle = little_endian_read_16(packet, 3); 3530 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3531 if (hci_stack->acl_fragmentation_total_size > 0u) { 3532 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3533 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3534 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3535 hci_stack->acl_fragmentation_total_size = 0; 3536 hci_stack->acl_fragmentation_pos = 0; 3537 if (release_buffer){ 3538 hci_release_packet_buffer(); 3539 } 3540 } 3541 } 3542 3543 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3544 // finalize iso stream if handle matches 3545 iso_stream = hci_iso_stream_for_cis_handle(handle); 3546 if (iso_stream != NULL){ 3547 hci_iso_stream_finalize(iso_stream); 3548 break; 3549 } 3550 #endif 3551 3552 conn = hci_connection_for_handle(handle); 3553 if (!conn) break; 3554 #ifdef ENABLE_CLASSIC 3555 // pairing failed if it was ongoing 3556 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3557 #endif 3558 3559 // emit dedicatd bonding event 3560 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3561 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3562 } 3563 3564 // mark connection for shutdown, stop timers, reset state 3565 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3566 hci_connection_stop_timer(conn); 3567 hci_connection_init(conn); 3568 3569 #ifdef ENABLE_BLE 3570 #ifdef ENABLE_LE_PERIPHERAL 3571 // re-enable advertisements for le connections if active 3572 if (hci_is_le_connection(conn)){ 3573 hci_update_advertisements_enabled_for_current_roles(); 3574 } 3575 #endif 3576 #endif 3577 break; 3578 3579 case HCI_EVENT_HARDWARE_ERROR: 3580 log_error("Hardware Error: 0x%02x", packet[2]); 3581 if (hci_stack->hardware_error_callback){ 3582 (*hci_stack->hardware_error_callback)(packet[2]); 3583 } else { 3584 // if no special requests, just reboot stack 3585 hci_power_control_off(); 3586 hci_power_control_on(); 3587 } 3588 break; 3589 3590 #ifdef ENABLE_CLASSIC 3591 case HCI_EVENT_ROLE_CHANGE: 3592 if (packet[2]) break; // status != 0 3593 reverse_bd_addr(&packet[3], addr); 3594 addr_type = BD_ADDR_TYPE_ACL; 3595 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3596 if (!conn) break; 3597 conn->role = packet[9]; 3598 break; 3599 #endif 3600 3601 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3602 // release packet buffer only for asynchronous transport and if there are not further fragements 3603 if (hci_transport_synchronous()) { 3604 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3605 return; // instead of break: to avoid re-entering hci_run() 3606 } 3607 hci_stack->acl_fragmentation_tx_active = 0; 3608 if (hci_stack->acl_fragmentation_total_size) break; 3609 hci_release_packet_buffer(); 3610 3611 // L2CAP receives this event via the hci_emit_event below 3612 3613 #ifdef ENABLE_CLASSIC 3614 // For SCO, we do the can_send_now_check here 3615 hci_notify_if_sco_can_send_now(); 3616 #endif 3617 break; 3618 3619 #ifdef ENABLE_CLASSIC 3620 case HCI_EVENT_SCO_CAN_SEND_NOW: 3621 // For SCO, we do the can_send_now_check here 3622 hci_stack->sco_can_send_now = true; 3623 hci_notify_if_sco_can_send_now(); 3624 return; 3625 3626 // explode inquriy results for easier consumption 3627 case HCI_EVENT_INQUIRY_RESULT: 3628 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3629 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3630 gap_inquiry_explode(packet, size); 3631 break; 3632 #endif 3633 3634 #ifdef ENABLE_BLE 3635 case HCI_EVENT_LE_META: 3636 switch (packet[2]){ 3637 #ifdef ENABLE_LE_CENTRAL 3638 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3639 if (!hci_stack->le_scanning_enabled) break; 3640 le_handle_advertisement_report(packet, size); 3641 break; 3642 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3643 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3644 if (!hci_stack->le_scanning_enabled) break; 3645 le_handle_extended_advertisement_report(packet, size); 3646 break; 3647 #endif 3648 #endif 3649 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3650 event_handle_le_connection_complete(packet); 3651 break; 3652 3653 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3654 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3655 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3656 conn = hci_connection_for_handle(handle); 3657 if (!conn) break; 3658 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3659 break; 3660 3661 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3662 // connection 3663 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3664 conn = hci_connection_for_handle(handle); 3665 if (conn) { 3666 // read arguments 3667 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3668 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3669 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3670 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3671 3672 // validate against current connection parameter range 3673 le_connection_parameter_range_t existing_range; 3674 gap_get_connection_parameter_range(&existing_range); 3675 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3676 if (update_parameter){ 3677 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3678 conn->le_conn_interval_min = le_conn_interval_min; 3679 conn->le_conn_interval_max = le_conn_interval_max; 3680 conn->le_conn_latency = le_conn_latency; 3681 conn->le_supervision_timeout = le_supervision_timeout; 3682 } else { 3683 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3684 } 3685 } 3686 break; 3687 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3688 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3689 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3690 conn = hci_connection_for_handle(handle); 3691 if (conn) { 3692 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3693 } 3694 break; 3695 #endif 3696 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3697 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 3698 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 3699 iso_stream = hci_iso_stream_for_cis_handle(handle); 3700 if (iso_stream){ 3701 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 3702 if (status == ERROR_CODE_SUCCESS){ 3703 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3704 } else { 3705 hci_iso_stream_finalize(iso_stream); 3706 } 3707 } 3708 #endif 3709 default: 3710 break; 3711 } 3712 break; 3713 #endif 3714 case HCI_EVENT_VENDOR_SPECIFIC: 3715 // Vendor specific commands often create vendor specific event instead of num completed packets 3716 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3717 switch (hci_stack->manufacturer){ 3718 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3719 hci_stack->num_cmd_packets = 1; 3720 break; 3721 default: 3722 break; 3723 } 3724 break; 3725 default: 3726 break; 3727 } 3728 3729 handle_event_for_current_stack_state(packet, size); 3730 3731 // notify upper stack 3732 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3733 3734 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3735 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3736 handle = little_endian_read_16(packet, 3); 3737 hci_connection_t * aConn = hci_connection_for_handle(handle); 3738 // discard connection if app did not trigger a reconnect in the event handler 3739 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3740 hci_shutdown_connection(aConn); 3741 } 3742 } 3743 3744 // execute main loop 3745 hci_run(); 3746 } 3747 3748 #ifdef ENABLE_CLASSIC 3749 3750 #ifdef ENABLE_SCO_OVER_HCI 3751 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3752 static void sco_schedule_tx(hci_connection_t * conn); 3753 3754 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3755 log_debug("SCO TX Timeout"); 3756 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3757 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3758 if (!conn) return; 3759 3760 // trigger send 3761 conn->sco_tx_ready = 1; 3762 // extra packet if CVSD but SCO buffer is too short 3763 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3764 conn->sco_tx_ready++; 3765 } 3766 hci_notify_if_sco_can_send_now(); 3767 } 3768 3769 3770 #define SCO_TX_AFTER_RX_MS (6) 3771 3772 static void sco_schedule_tx(hci_connection_t * conn){ 3773 3774 uint32_t now = btstack_run_loop_get_time_ms(); 3775 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3776 int time_delta_ms = sco_tx_ms - now; 3777 3778 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3779 3780 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3781 btstack_run_loop_remove_timer(timer); 3782 btstack_run_loop_set_timer(timer, time_delta_ms); 3783 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3784 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3785 btstack_run_loop_add_timer(timer); 3786 } 3787 #endif 3788 3789 static void sco_handler(uint8_t * packet, uint16_t size){ 3790 // lookup connection struct 3791 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3792 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3793 if (!conn) return; 3794 3795 #ifdef ENABLE_SCO_OVER_HCI 3796 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3797 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3798 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3799 packet[2] = 0x3c; 3800 memmove(&packet[3], &packet[23], 63); 3801 size = 63; 3802 } 3803 } 3804 3805 if (hci_have_usb_transport()){ 3806 // Nothing to do 3807 } else { 3808 // 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); 3809 if (hci_stack->synchronous_flow_control_enabled == 0){ 3810 uint32_t now = btstack_run_loop_get_time_ms(); 3811 3812 if (!conn->sco_rx_valid){ 3813 // ignore first 10 packets 3814 conn->sco_rx_count++; 3815 // log_debug("sco rx count %u", conn->sco_rx_count); 3816 if (conn->sco_rx_count == 10) { 3817 // use first timestamp as is and pretent it just started 3818 conn->sco_rx_ms = now; 3819 conn->sco_rx_valid = 1; 3820 conn->sco_rx_count = 0; 3821 sco_schedule_tx(conn); 3822 } 3823 } else { 3824 // track expected arrival timme 3825 conn->sco_rx_count++; 3826 conn->sco_rx_ms += 7; 3827 int delta = (int32_t) (now - conn->sco_rx_ms); 3828 if (delta > 0){ 3829 conn->sco_rx_ms++; 3830 } 3831 // log_debug("sco rx %u", conn->sco_rx_ms); 3832 sco_schedule_tx(conn); 3833 } 3834 } 3835 } 3836 #endif 3837 3838 // deliver to app 3839 if (hci_stack->sco_packet_handler) { 3840 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3841 } 3842 3843 #ifdef HAVE_SCO_TRANSPORT 3844 // We can send one packet for each received packet 3845 conn->sco_tx_ready++; 3846 hci_notify_if_sco_can_send_now(); 3847 #endif 3848 3849 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3850 conn->num_packets_completed++; 3851 hci_stack->host_completed_packets = 1; 3852 hci_run(); 3853 #endif 3854 } 3855 #endif 3856 3857 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3858 hci_dump_packet(packet_type, 1, packet, size); 3859 switch (packet_type) { 3860 case HCI_EVENT_PACKET: 3861 event_handler(packet, size); 3862 break; 3863 case HCI_ACL_DATA_PACKET: 3864 acl_handler(packet, size); 3865 break; 3866 #ifdef ENABLE_CLASSIC 3867 case HCI_SCO_DATA_PACKET: 3868 sco_handler(packet, size); 3869 break; 3870 #endif 3871 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3872 case HCI_ISO_DATA_PACKET: 3873 if (hci_stack->iso_packet_handler != NULL){ 3874 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 3875 } 3876 break; 3877 #endif 3878 default: 3879 break; 3880 } 3881 } 3882 3883 /** 3884 * @brief Add event packet handler. 3885 */ 3886 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3887 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3888 } 3889 3890 /** 3891 * @brief Remove event packet handler. 3892 */ 3893 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3894 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3895 } 3896 3897 /** Register HCI packet handlers */ 3898 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3899 hci_stack->acl_packet_handler = handler; 3900 } 3901 3902 #ifdef ENABLE_CLASSIC 3903 /** 3904 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3905 */ 3906 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3907 hci_stack->sco_packet_handler = handler; 3908 } 3909 #endif 3910 3911 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3912 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 3913 hci_stack->iso_packet_handler = handler; 3914 } 3915 #endif 3916 3917 static void hci_state_reset(void){ 3918 // no connections yet 3919 hci_stack->connections = NULL; 3920 3921 // keep discoverable/connectable as this has been requested by the client(s) 3922 // hci_stack->discoverable = 0; 3923 // hci_stack->connectable = 0; 3924 // hci_stack->bondable = 1; 3925 // hci_stack->own_addr_type = 0; 3926 3927 // buffer is free 3928 hci_stack->hci_packet_buffer_reserved = false; 3929 3930 // no pending cmds 3931 hci_stack->decline_reason = 0; 3932 3933 hci_stack->secure_connections_active = false; 3934 3935 #ifdef ENABLE_CLASSIC 3936 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3937 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3938 3939 hci_stack->gap_tasks_classic = 3940 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3941 GAP_TASK_SET_CLASS_OF_DEVICE | 3942 GAP_TASK_SET_LOCAL_NAME | 3943 GAP_TASK_SET_EIR_DATA | 3944 GAP_TASK_WRITE_SCAN_ENABLE | 3945 GAP_TASK_WRITE_PAGE_TIMEOUT; 3946 #endif 3947 3948 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3949 hci_stack->classic_read_local_oob_data = false; 3950 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3951 #endif 3952 3953 // LE 3954 #ifdef ENABLE_BLE 3955 memset(hci_stack->le_random_address, 0, 6); 3956 hci_stack->le_random_address_set = 0; 3957 #endif 3958 #ifdef ENABLE_LE_CENTRAL 3959 hci_stack->le_scanning_active = false; 3960 hci_stack->le_scanning_param_update = true; 3961 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3962 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3963 hci_stack->le_whitelist_capacity = 0; 3964 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3965 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 3966 #endif 3967 #endif 3968 #ifdef ENABLE_LE_PERIPHERAL 3969 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3970 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3971 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3972 } 3973 if (hci_stack->le_advertisements_data != NULL){ 3974 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3975 } 3976 #endif 3977 } 3978 3979 #ifdef ENABLE_CLASSIC 3980 /** 3981 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3982 */ 3983 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3984 // store and open remote device db 3985 hci_stack->link_key_db = link_key_db; 3986 if (hci_stack->link_key_db) { 3987 hci_stack->link_key_db->open(); 3988 } 3989 } 3990 #endif 3991 3992 void hci_init(const hci_transport_t *transport, const void *config){ 3993 3994 #ifdef HAVE_MALLOC 3995 if (!hci_stack) { 3996 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3997 } 3998 #else 3999 hci_stack = &hci_stack_static; 4000 #endif 4001 memset(hci_stack, 0, sizeof(hci_stack_t)); 4002 4003 // reference to use transport layer implementation 4004 hci_stack->hci_transport = transport; 4005 4006 // reference to used config 4007 hci_stack->config = config; 4008 4009 // setup pointer for outgoing packet buffer 4010 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4011 4012 // max acl payload size defined in config.h 4013 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4014 4015 // register packet handlers with transport 4016 transport->register_packet_handler(&packet_handler); 4017 4018 hci_stack->state = HCI_STATE_OFF; 4019 4020 // class of device 4021 hci_stack->class_of_device = 0x007a020c; // Smartphone 4022 4023 // bondable by default 4024 hci_stack->bondable = 1; 4025 4026 #ifdef ENABLE_CLASSIC 4027 // classic name 4028 hci_stack->local_name = default_classic_name; 4029 4030 // Master slave policy 4031 hci_stack->master_slave_policy = 1; 4032 4033 // Allow Role Switch 4034 hci_stack->allow_role_switch = 1; 4035 4036 // Default / minimum security level = 2 4037 hci_stack->gap_security_level = LEVEL_2; 4038 4039 // Default Security Mode 4 4040 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4041 4042 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4043 hci_stack->gap_required_encyrption_key_size = 7; 4044 4045 // Link Supervision Timeout 4046 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4047 4048 #endif 4049 4050 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4051 hci_stack->ssp_enable = 1; 4052 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4053 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4054 hci_stack->ssp_auto_accept = 1; 4055 4056 // Secure Connections: enable (requires support from Controller) 4057 hci_stack->secure_connections_enable = true; 4058 4059 // voice setting - signed 16 bit pcm data with CVSD over the air 4060 hci_stack->sco_voice_setting = 0x60; 4061 4062 #ifdef ENABLE_LE_CENTRAL 4063 // connection parameter to use for outgoing connections 4064 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4065 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4066 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4067 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4068 hci_stack->le_connection_latency = 4; // 4 4069 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4070 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4071 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4072 4073 // default LE Scanning 4074 hci_stack->le_scan_type = 0x1; // active 4075 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4076 hci_stack->le_scan_window = 0x30; // 30 ms 4077 #endif 4078 4079 #ifdef ENABLE_LE_PERIPHERAL 4080 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4081 #endif 4082 4083 // connection parameter range used to answer connection parameter update requests in l2cap 4084 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4085 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4086 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4087 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4088 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4089 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4090 4091 hci_state_reset(); 4092 } 4093 4094 void hci_deinit(void){ 4095 btstack_run_loop_remove_timer(&hci_stack->timeout); 4096 #ifdef HAVE_MALLOC 4097 if (hci_stack) { 4098 free(hci_stack); 4099 } 4100 #endif 4101 hci_stack = NULL; 4102 4103 #ifdef ENABLE_CLASSIC 4104 disable_l2cap_timeouts = 0; 4105 #endif 4106 } 4107 4108 /** 4109 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4110 */ 4111 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4112 hci_stack->chipset = chipset_driver; 4113 4114 // reset chipset driver - init is also called on power_up 4115 if (hci_stack->chipset && hci_stack->chipset->init){ 4116 hci_stack->chipset->init(hci_stack->config); 4117 } 4118 } 4119 4120 /** 4121 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4122 */ 4123 void hci_set_control(const btstack_control_t *hardware_control){ 4124 // references to used control implementation 4125 hci_stack->control = hardware_control; 4126 // init with transport config 4127 hardware_control->init(hci_stack->config); 4128 } 4129 4130 static void hci_discard_connections(void){ 4131 btstack_linked_list_iterator_t lit; 4132 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 4133 while (btstack_linked_list_iterator_has_next(&lit)){ 4134 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4135 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 4136 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4137 hci_shutdown_connection(connection); 4138 } 4139 } 4140 4141 void hci_close(void){ 4142 4143 #ifdef ENABLE_CLASSIC 4144 // close remote device db 4145 if (hci_stack->link_key_db) { 4146 hci_stack->link_key_db->close(); 4147 } 4148 #endif 4149 4150 hci_discard_connections(); 4151 4152 hci_power_control(HCI_POWER_OFF); 4153 4154 #ifdef HAVE_MALLOC 4155 free(hci_stack); 4156 #endif 4157 hci_stack = NULL; 4158 } 4159 4160 #ifdef HAVE_SCO_TRANSPORT 4161 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4162 hci_stack->sco_transport = sco_transport; 4163 sco_transport->register_packet_handler(&packet_handler); 4164 } 4165 #endif 4166 4167 #ifdef ENABLE_CLASSIC 4168 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4169 // validate ranage and set 4170 if (encryption_key_size < 7) return; 4171 if (encryption_key_size > 16) return; 4172 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4173 } 4174 4175 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4176 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4177 hci_stack->gap_security_mode = security_mode; 4178 return ERROR_CODE_SUCCESS; 4179 } else { 4180 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4181 } 4182 } 4183 4184 gap_security_mode_t gap_get_security_mode(void){ 4185 return hci_stack->gap_security_mode; 4186 } 4187 4188 void gap_set_security_level(gap_security_level_t security_level){ 4189 hci_stack->gap_security_level = security_level; 4190 } 4191 4192 gap_security_level_t gap_get_security_level(void){ 4193 if (hci_stack->gap_secure_connections_only_mode){ 4194 return LEVEL_4; 4195 } 4196 return hci_stack->gap_security_level; 4197 } 4198 4199 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4200 hci_stack->gap_minimal_service_security_level = security_level; 4201 } 4202 4203 void gap_set_secure_connections_only_mode(bool enable){ 4204 hci_stack->gap_secure_connections_only_mode = enable; 4205 } 4206 4207 bool gap_get_secure_connections_only_mode(void){ 4208 return hci_stack->gap_secure_connections_only_mode; 4209 } 4210 #endif 4211 4212 #ifdef ENABLE_CLASSIC 4213 void gap_set_class_of_device(uint32_t class_of_device){ 4214 hci_stack->class_of_device = class_of_device; 4215 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4216 hci_run(); 4217 } 4218 4219 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4220 hci_stack->default_link_policy_settings = default_link_policy_settings; 4221 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4222 hci_run(); 4223 } 4224 4225 void gap_set_allow_role_switch(bool allow_role_switch){ 4226 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4227 } 4228 4229 uint8_t hci_get_allow_role_switch(void){ 4230 return hci_stack->allow_role_switch; 4231 } 4232 4233 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4234 hci_stack->link_supervision_timeout = link_supervision_timeout; 4235 } 4236 4237 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4238 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4239 } 4240 4241 uint16_t hci_automatic_flush_timeout(void){ 4242 return hci_stack->automatic_flush_timeout; 4243 } 4244 4245 void hci_disable_l2cap_timeout_check(void){ 4246 disable_l2cap_timeouts = 1; 4247 } 4248 #endif 4249 4250 #ifndef HAVE_HOST_CONTROLLER_API 4251 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4252 void hci_set_bd_addr(bd_addr_t addr){ 4253 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4254 hci_stack->custom_bd_addr_set = 1; 4255 } 4256 #endif 4257 4258 // State-Module-Driver overview 4259 // state module low-level 4260 // HCI_STATE_OFF off close 4261 // HCI_STATE_INITIALIZING, on open 4262 // HCI_STATE_WORKING, on open 4263 // HCI_STATE_HALTING, on open 4264 // HCI_STATE_SLEEPING, off/sleep close 4265 // HCI_STATE_FALLING_ASLEEP on open 4266 4267 static int hci_power_control_on(void){ 4268 4269 // power on 4270 int err = 0; 4271 if (hci_stack->control && hci_stack->control->on){ 4272 err = (*hci_stack->control->on)(); 4273 } 4274 if (err){ 4275 log_error( "POWER_ON failed"); 4276 hci_emit_hci_open_failed(); 4277 return err; 4278 } 4279 4280 // int chipset driver 4281 if (hci_stack->chipset && hci_stack->chipset->init){ 4282 hci_stack->chipset->init(hci_stack->config); 4283 } 4284 4285 // init transport 4286 if (hci_stack->hci_transport->init){ 4287 hci_stack->hci_transport->init(hci_stack->config); 4288 } 4289 4290 // open transport 4291 err = hci_stack->hci_transport->open(); 4292 if (err){ 4293 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4294 if (hci_stack->control && hci_stack->control->off){ 4295 (*hci_stack->control->off)(); 4296 } 4297 hci_emit_hci_open_failed(); 4298 return err; 4299 } 4300 return 0; 4301 } 4302 4303 static void hci_power_control_off(void){ 4304 4305 log_info("hci_power_control_off"); 4306 4307 // close low-level device 4308 hci_stack->hci_transport->close(); 4309 4310 log_info("hci_power_control_off - hci_transport closed"); 4311 4312 // power off 4313 if (hci_stack->control && hci_stack->control->off){ 4314 (*hci_stack->control->off)(); 4315 } 4316 4317 log_info("hci_power_control_off - control closed"); 4318 4319 hci_stack->state = HCI_STATE_OFF; 4320 } 4321 4322 static void hci_power_control_sleep(void){ 4323 4324 log_info("hci_power_control_sleep"); 4325 4326 #if 0 4327 // don't close serial port during sleep 4328 4329 // close low-level device 4330 hci_stack->hci_transport->close(hci_stack->config); 4331 #endif 4332 4333 // sleep mode 4334 if (hci_stack->control && hci_stack->control->sleep){ 4335 (*hci_stack->control->sleep)(); 4336 } 4337 4338 hci_stack->state = HCI_STATE_SLEEPING; 4339 } 4340 4341 static int hci_power_control_wake(void){ 4342 4343 log_info("hci_power_control_wake"); 4344 4345 // wake on 4346 if (hci_stack->control && hci_stack->control->wake){ 4347 (*hci_stack->control->wake)(); 4348 } 4349 4350 #if 0 4351 // open low-level device 4352 int err = hci_stack->hci_transport->open(hci_stack->config); 4353 if (err){ 4354 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4355 if (hci_stack->control && hci_stack->control->off){ 4356 (*hci_stack->control->off)(); 4357 } 4358 hci_emit_hci_open_failed(); 4359 return err; 4360 } 4361 #endif 4362 4363 return 0; 4364 } 4365 4366 static void hci_power_enter_initializing_state(void){ 4367 // set up state machine 4368 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4369 hci_stack->hci_packet_buffer_reserved = false; 4370 hci_stack->state = HCI_STATE_INITIALIZING; 4371 hci_stack->substate = HCI_INIT_SEND_RESET; 4372 } 4373 4374 static void hci_power_enter_halting_state(void){ 4375 #ifdef ENABLE_BLE 4376 hci_whitelist_free(); 4377 #endif 4378 // see hci_run 4379 hci_stack->state = HCI_STATE_HALTING; 4380 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4381 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4382 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4383 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4384 btstack_run_loop_add_timer(&hci_stack->timeout); 4385 } 4386 4387 // returns error 4388 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4389 int err; 4390 switch (power_mode){ 4391 case HCI_POWER_ON: 4392 err = hci_power_control_on(); 4393 if (err != 0) { 4394 log_error("hci_power_control_on() error %d", err); 4395 return err; 4396 } 4397 hci_power_enter_initializing_state(); 4398 break; 4399 case HCI_POWER_OFF: 4400 // do nothing 4401 break; 4402 case HCI_POWER_SLEEP: 4403 // do nothing (with SLEEP == OFF) 4404 break; 4405 default: 4406 btstack_assert(false); 4407 break; 4408 } 4409 return ERROR_CODE_SUCCESS; 4410 } 4411 4412 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4413 switch (power_mode){ 4414 case HCI_POWER_ON: 4415 // do nothing 4416 break; 4417 case HCI_POWER_OFF: 4418 // no connections yet, just turn it off 4419 hci_power_control_off(); 4420 break; 4421 case HCI_POWER_SLEEP: 4422 // no connections yet, just turn it off 4423 hci_power_control_sleep(); 4424 break; 4425 default: 4426 btstack_assert(false); 4427 break; 4428 } 4429 return ERROR_CODE_SUCCESS; 4430 } 4431 4432 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4433 switch (power_mode){ 4434 case HCI_POWER_ON: 4435 // do nothing 4436 break; 4437 case HCI_POWER_OFF: 4438 hci_power_enter_halting_state(); 4439 break; 4440 case HCI_POWER_SLEEP: 4441 // see hci_run 4442 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4443 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4444 break; 4445 default: 4446 btstack_assert(false); 4447 break; 4448 } 4449 return ERROR_CODE_SUCCESS; 4450 } 4451 4452 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4453 switch (power_mode){ 4454 case HCI_POWER_ON: 4455 hci_power_enter_initializing_state(); 4456 break; 4457 case HCI_POWER_OFF: 4458 // do nothing 4459 break; 4460 case HCI_POWER_SLEEP: 4461 // see hci_run 4462 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4463 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4464 break; 4465 default: 4466 btstack_assert(false); 4467 break; 4468 } 4469 return ERROR_CODE_SUCCESS; 4470 } 4471 4472 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4473 switch (power_mode){ 4474 case HCI_POWER_ON: 4475 hci_power_enter_initializing_state(); 4476 break; 4477 case HCI_POWER_OFF: 4478 hci_power_enter_halting_state(); 4479 break; 4480 case HCI_POWER_SLEEP: 4481 // do nothing 4482 break; 4483 default: 4484 btstack_assert(false); 4485 break; 4486 } 4487 return ERROR_CODE_SUCCESS; 4488 } 4489 4490 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4491 int err; 4492 switch (power_mode){ 4493 case HCI_POWER_ON: 4494 err = hci_power_control_wake(); 4495 if (err) return err; 4496 hci_power_enter_initializing_state(); 4497 break; 4498 case HCI_POWER_OFF: 4499 hci_power_enter_halting_state(); 4500 break; 4501 case HCI_POWER_SLEEP: 4502 // do nothing 4503 break; 4504 default: 4505 btstack_assert(false); 4506 break; 4507 } 4508 return ERROR_CODE_SUCCESS; 4509 } 4510 4511 int hci_power_control(HCI_POWER_MODE power_mode){ 4512 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4513 int err = 0; 4514 switch (hci_stack->state){ 4515 case HCI_STATE_OFF: 4516 err = hci_power_control_state_off(power_mode); 4517 break; 4518 case HCI_STATE_INITIALIZING: 4519 err = hci_power_control_state_initializing(power_mode); 4520 break; 4521 case HCI_STATE_WORKING: 4522 err = hci_power_control_state_working(power_mode); 4523 break; 4524 case HCI_STATE_HALTING: 4525 err = hci_power_control_state_halting(power_mode); 4526 break; 4527 case HCI_STATE_FALLING_ASLEEP: 4528 err = hci_power_control_state_falling_asleep(power_mode); 4529 break; 4530 case HCI_STATE_SLEEPING: 4531 err = hci_power_control_state_sleeping(power_mode); 4532 break; 4533 default: 4534 btstack_assert(false); 4535 break; 4536 } 4537 if (err != 0){ 4538 return err; 4539 } 4540 4541 // create internal event 4542 hci_emit_state(); 4543 4544 // trigger next/first action 4545 hci_run(); 4546 4547 return 0; 4548 } 4549 4550 4551 static void hci_halting_run(void) { 4552 4553 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4554 4555 hci_connection_t *connection; 4556 #ifdef ENABLE_BLE 4557 #ifdef ENABLE_LE_PERIPHERAL 4558 bool stop_advertismenets; 4559 #endif 4560 #endif 4561 4562 switch (hci_stack->substate) { 4563 case HCI_HALTING_CLASSIC_STOP: 4564 #ifdef ENABLE_CLASSIC 4565 if (!hci_can_send_command_packet_now()) return; 4566 4567 if (hci_stack->connectable || hci_stack->discoverable){ 4568 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4569 hci_send_cmd(&hci_write_scan_enable, 0); 4570 return; 4571 } 4572 #endif 4573 /* fall through */ 4574 4575 case HCI_HALTING_LE_ADV_STOP: 4576 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4577 4578 #ifdef ENABLE_BLE 4579 #ifdef ENABLE_LE_PERIPHERAL 4580 if (!hci_can_send_command_packet_now()) return; 4581 4582 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4583 4584 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4585 if (hci_extended_advertising_supported()){ 4586 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4587 btstack_linked_list_iterator_t it; 4588 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4589 // stop all periodic advertisements and check if an extended set is active 4590 while (btstack_linked_list_iterator_has_next(&it)){ 4591 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4592 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4593 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4594 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4595 return; 4596 } 4597 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4598 stop_advertismenets = true; 4599 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4600 } 4601 } 4602 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 4603 if (stop_advertismenets){ 4604 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4605 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4606 return; 4607 } 4608 } 4609 else 4610 #else 4611 { 4612 if (stop_advertismenets) { 4613 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4614 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4615 return; 4616 } 4617 } 4618 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4619 #endif /* ENABLE_LE_PERIPHERAL */ 4620 #endif /* ENABLE_BLE */ 4621 4622 /* fall through */ 4623 4624 case HCI_HALTING_LE_SCAN_STOP: 4625 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4626 if (!hci_can_send_command_packet_now()) return; 4627 4628 #ifdef ENABLE_BLE 4629 #ifdef ENABLE_LE_CENTRAL 4630 if (hci_stack->le_scanning_active){ 4631 hci_le_scan_stop(); 4632 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4633 return; 4634 } 4635 #endif 4636 #endif 4637 4638 /* fall through */ 4639 4640 case HCI_HALTING_DISCONNECT_ALL: 4641 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4642 if (!hci_can_send_command_packet_now()) return; 4643 4644 // close all open connections 4645 connection = (hci_connection_t *) hci_stack->connections; 4646 if (connection) { 4647 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4648 4649 // check state 4650 if (connection->state == SENT_DISCONNECT) return; 4651 connection->state = SENT_DISCONNECT; 4652 4653 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4654 4655 // finally, send the disconnect command 4656 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4657 return; 4658 } 4659 4660 btstack_run_loop_remove_timer(&hci_stack->timeout); 4661 4662 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4663 4664 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4665 log_info("HCI_STATE_HALTING: wait 50 ms"); 4666 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4667 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4668 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4669 btstack_run_loop_add_timer(&hci_stack->timeout); 4670 break; 4671 4672 case HCI_HALTING_CLOSE: 4673 // close left over connections (that had not been properly closed before) 4674 hci_discard_connections(); 4675 4676 log_info("HCI_STATE_HALTING, calling off"); 4677 4678 // switch mode 4679 hci_power_control_off(); 4680 4681 log_info("HCI_STATE_HALTING, emitting state"); 4682 hci_emit_state(); 4683 log_info("HCI_STATE_HALTING, done"); 4684 break; 4685 4686 case HCI_HALTING_W4_CLOSE_TIMER: 4687 // keep waiting 4688 4689 break; 4690 default: 4691 break; 4692 } 4693 }; 4694 4695 static void hci_falling_asleep_run(void){ 4696 hci_connection_t * connection; 4697 switch(hci_stack->substate) { 4698 case HCI_FALLING_ASLEEP_DISCONNECT: 4699 log_info("HCI_STATE_FALLING_ASLEEP"); 4700 // close all open connections 4701 connection = (hci_connection_t *) hci_stack->connections; 4702 if (connection){ 4703 4704 // send disconnect 4705 if (!hci_can_send_command_packet_now()) return; 4706 4707 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4708 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4709 4710 // send disconnected event right away - causes higher layer connections to get closed, too. 4711 hci_shutdown_connection(connection); 4712 return; 4713 } 4714 4715 if (hci_classic_supported()){ 4716 // disable page and inquiry scan 4717 if (!hci_can_send_command_packet_now()) return; 4718 4719 log_info("HCI_STATE_HALTING, disabling inq scans"); 4720 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4721 4722 // continue in next sub state 4723 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4724 break; 4725 } 4726 4727 /* fall through */ 4728 4729 case HCI_FALLING_ASLEEP_COMPLETE: 4730 log_info("HCI_STATE_HALTING, calling sleep"); 4731 // switch mode 4732 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4733 hci_emit_state(); 4734 break; 4735 4736 default: 4737 break; 4738 } 4739 } 4740 4741 #ifdef ENABLE_CLASSIC 4742 4743 static void hci_update_scan_enable(void){ 4744 // 2 = page scan, 1 = inq scan 4745 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4746 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4747 hci_run(); 4748 } 4749 4750 void gap_discoverable_control(uint8_t enable){ 4751 if (enable) enable = 1; // normalize argument 4752 4753 if (hci_stack->discoverable == enable){ 4754 hci_emit_discoverable_enabled(hci_stack->discoverable); 4755 return; 4756 } 4757 4758 hci_stack->discoverable = enable; 4759 hci_update_scan_enable(); 4760 } 4761 4762 void gap_connectable_control(uint8_t enable){ 4763 if (enable) enable = 1; // normalize argument 4764 4765 // don't emit event 4766 if (hci_stack->connectable == enable) return; 4767 4768 hci_stack->connectable = enable; 4769 hci_update_scan_enable(); 4770 } 4771 #endif 4772 4773 void gap_local_bd_addr(bd_addr_t address_buffer){ 4774 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4775 } 4776 4777 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4778 static void hci_host_num_completed_packets(void){ 4779 4780 // create packet manually as arrays are not supported and num_commands should not get reduced 4781 hci_reserve_packet_buffer(); 4782 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4783 4784 uint16_t size = 0; 4785 uint16_t num_handles = 0; 4786 packet[size++] = 0x35; 4787 packet[size++] = 0x0c; 4788 size++; // skip param len 4789 size++; // skip num handles 4790 4791 // add { handle, packets } entries 4792 btstack_linked_item_t * it; 4793 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4794 hci_connection_t * connection = (hci_connection_t *) it; 4795 if (connection->num_packets_completed){ 4796 little_endian_store_16(packet, size, connection->con_handle); 4797 size += 2; 4798 little_endian_store_16(packet, size, connection->num_packets_completed); 4799 size += 2; 4800 // 4801 num_handles++; 4802 connection->num_packets_completed = 0; 4803 } 4804 } 4805 4806 packet[2] = size - 3; 4807 packet[3] = num_handles; 4808 4809 hci_stack->host_completed_packets = 0; 4810 4811 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4812 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4813 4814 // release packet buffer for synchronous transport implementations 4815 if (hci_transport_synchronous()){ 4816 hci_release_packet_buffer(); 4817 hci_emit_transport_packet_sent(); 4818 } 4819 } 4820 #endif 4821 4822 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4823 UNUSED(ds); 4824 hci_stack->substate = HCI_HALTING_CLOSE; 4825 // allow packet handlers to defer final shutdown 4826 hci_emit_state(); 4827 hci_run(); 4828 } 4829 4830 static bool hci_run_acl_fragments(void){ 4831 if (hci_stack->acl_fragmentation_total_size > 0u) { 4832 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4833 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4834 if (connection) { 4835 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4836 hci_send_acl_packet_fragments(connection); 4837 return true; 4838 } 4839 } else { 4840 // connection gone -> discard further fragments 4841 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4842 hci_stack->acl_fragmentation_total_size = 0; 4843 hci_stack->acl_fragmentation_pos = 0; 4844 } 4845 } 4846 return false; 4847 } 4848 4849 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4850 static bool hci_run_iso_fragments(void){ 4851 if (hci_stack->iso_fragmentation_total_size > 0u) { 4852 // TODO: flow control 4853 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 4854 hci_send_iso_packet_fragments(); 4855 return true; 4856 } 4857 } 4858 return false; 4859 } 4860 #endif 4861 4862 #ifdef ENABLE_CLASSIC 4863 4864 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4865 static bool hci_classic_operation_active(void) { 4866 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4867 return true; 4868 } 4869 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4870 return true; 4871 } 4872 btstack_linked_item_t * it; 4873 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4874 hci_connection_t *connection = (hci_connection_t *) it; 4875 switch (connection->state) { 4876 case SENT_CREATE_CONNECTION: 4877 case SENT_CANCEL_CONNECTION: 4878 case SENT_DISCONNECT: 4879 return true; 4880 default: 4881 break; 4882 } 4883 } 4884 return false; 4885 } 4886 #endif 4887 4888 static bool hci_run_general_gap_classic(void){ 4889 4890 // assert stack is working and classic is active 4891 if (hci_classic_supported() == false) return false; 4892 if (hci_stack->state != HCI_STATE_WORKING) return false; 4893 4894 // decline incoming connections 4895 if (hci_stack->decline_reason){ 4896 uint8_t reason = hci_stack->decline_reason; 4897 hci_stack->decline_reason = 0; 4898 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4899 return true; 4900 } 4901 4902 if (hci_stack->gap_tasks_classic != 0){ 4903 hci_run_gap_tasks_classic(); 4904 return true; 4905 } 4906 4907 // start/stop inquiry 4908 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4909 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4910 if (hci_classic_operation_active() == false) 4911 #endif 4912 { 4913 uint8_t duration = hci_stack->inquiry_state; 4914 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4915 if (hci_stack->inquiry_max_period_length != 0){ 4916 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); 4917 } else { 4918 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4919 } 4920 return true; 4921 } 4922 } 4923 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4924 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4925 hci_send_cmd(&hci_inquiry_cancel); 4926 return true; 4927 } 4928 4929 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 4930 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4931 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 4932 return true; 4933 } 4934 4935 // remote name request 4936 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4937 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4938 if (hci_classic_operation_active() == false) 4939 #endif 4940 { 4941 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4942 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4943 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4944 return true; 4945 } 4946 } 4947 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4948 // Local OOB data 4949 if (hci_stack->classic_read_local_oob_data){ 4950 hci_stack->classic_read_local_oob_data = false; 4951 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4952 hci_send_cmd(&hci_read_local_extended_oob_data); 4953 } else { 4954 hci_send_cmd(&hci_read_local_oob_data); 4955 } 4956 } 4957 #endif 4958 // pairing 4959 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4960 uint8_t state = hci_stack->gap_pairing_state; 4961 uint8_t pin_code[16]; 4962 switch (state){ 4963 case GAP_PAIRING_STATE_SEND_PIN: 4964 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4965 memset(pin_code, 0, 16); 4966 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4967 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4968 break; 4969 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4970 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4971 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4972 break; 4973 case GAP_PAIRING_STATE_SEND_PASSKEY: 4974 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4975 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4976 break; 4977 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4978 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4979 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4980 break; 4981 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4982 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4983 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4984 break; 4985 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4986 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4987 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4988 break; 4989 default: 4990 break; 4991 } 4992 return true; 4993 } 4994 return false; 4995 } 4996 #endif 4997 4998 #ifdef ENABLE_BLE 4999 5000 #ifdef ENABLE_LE_CENTRAL 5001 static void hci_le_scan_stop(void){ 5002 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5003 if (hci_extended_advertising_supported()) { 5004 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5005 } else 5006 #endif 5007 { 5008 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5009 } 5010 } 5011 #endif 5012 5013 #ifdef ENABLE_LE_PERIPHERAL 5014 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5015 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5016 uint8_t operation = 0; 5017 if (pos == 0){ 5018 // first fragment or complete data 5019 operation |= 1; 5020 } 5021 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5022 // last fragment or complete data 5023 operation |= 2; 5024 } 5025 return operation; 5026 } 5027 #endif 5028 #endif 5029 5030 static bool hci_run_general_gap_le(void){ 5031 5032 btstack_linked_list_iterator_t lit; 5033 5034 // Phase 1: collect what to stop 5035 5036 #ifdef ENABLE_LE_CENTRAL 5037 bool scanning_stop = false; 5038 bool connecting_stop = false; 5039 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5040 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5041 bool periodic_sync_stop = false; 5042 #endif 5043 #endif 5044 #endif 5045 5046 #ifdef ENABLE_LE_PERIPHERAL 5047 bool advertising_stop = false; 5048 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5049 le_advertising_set_t * advertising_stop_set = NULL; 5050 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5051 bool periodic_advertising_stop = false; 5052 #endif 5053 #endif 5054 #endif 5055 5056 // check if own address changes 5057 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5058 5059 // check if whitelist needs modification 5060 bool whitelist_modification_pending = false; 5061 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5062 while (btstack_linked_list_iterator_has_next(&lit)){ 5063 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5064 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5065 whitelist_modification_pending = true; 5066 break; 5067 } 5068 } 5069 5070 // check if resolving list needs modification 5071 bool resolving_list_modification_pending = false; 5072 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5073 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5074 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5075 resolving_list_modification_pending = true; 5076 } 5077 #endif 5078 5079 #ifdef ENABLE_LE_CENTRAL 5080 5081 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5082 // check if periodic advertiser list needs modification 5083 bool periodic_list_modification_pending = false; 5084 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5085 while (btstack_linked_list_iterator_has_next(&lit)){ 5086 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5087 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5088 periodic_list_modification_pending = true; 5089 break; 5090 } 5091 } 5092 #endif 5093 5094 // scanning control 5095 if (hci_stack->le_scanning_active) { 5096 // stop if: 5097 // - parameter change required 5098 // - it's disabled 5099 // - whitelist change required but used for scanning 5100 // - resolving list modified 5101 // - own address changes 5102 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5103 if ((hci_stack->le_scanning_param_update) || 5104 !hci_stack->le_scanning_enabled || 5105 (scanning_uses_whitelist && whitelist_modification_pending) || 5106 resolving_list_modification_pending || 5107 random_address_change){ 5108 5109 scanning_stop = true; 5110 } 5111 } 5112 5113 // connecting control 5114 bool connecting_with_whitelist; 5115 switch (hci_stack->le_connecting_state){ 5116 case LE_CONNECTING_DIRECT: 5117 case LE_CONNECTING_WHITELIST: 5118 // stop connecting if: 5119 // - connecting uses white and whitelist modification pending 5120 // - if it got disabled 5121 // - resolving list modified 5122 // - own address changes 5123 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5124 if ((connecting_with_whitelist && whitelist_modification_pending) || 5125 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5126 resolving_list_modification_pending || 5127 random_address_change) { 5128 5129 connecting_stop = true; 5130 } 5131 break; 5132 default: 5133 break; 5134 } 5135 5136 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5137 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5138 // periodic sync control 5139 bool sync_with_advertiser_list; 5140 switch(hci_stack->le_periodic_sync_state){ 5141 case LE_CONNECTING_DIRECT: 5142 case LE_CONNECTING_WHITELIST: 5143 // stop sync if: 5144 // - sync with advertiser list and advertiser list modification pending 5145 // - if it got disabled 5146 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5147 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5148 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5149 periodic_sync_stop = true; 5150 } 5151 break; 5152 default: 5153 break; 5154 } 5155 #endif 5156 #endif 5157 5158 #endif /* ENABLE_LE_CENTRAL */ 5159 5160 #ifdef ENABLE_LE_PERIPHERAL 5161 // le advertisement control 5162 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5163 // stop if: 5164 // - parameter change required 5165 // - random address used in advertising and changes 5166 // - it's disabled 5167 // - whitelist change required but used for advertisement filter policy 5168 // - resolving list modified 5169 // - own address changes 5170 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5171 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5172 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5173 if (advertising_change || 5174 (advertising_uses_random_address && random_address_change) || 5175 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5176 (advertising_uses_whitelist && whitelist_modification_pending) || 5177 resolving_list_modification_pending || 5178 random_address_change) { 5179 5180 advertising_stop = true; 5181 } 5182 } 5183 5184 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5185 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5186 btstack_linked_list_iterator_t it; 5187 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5188 while (btstack_linked_list_iterator_has_next(&it)){ 5189 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5190 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5191 // stop if: 5192 // - parameter change required 5193 // - random address used in connectable advertising and changes 5194 // - it's disabled 5195 // - whitelist change required but used for advertisement filter policy 5196 // - resolving list modified 5197 // - own address changes 5198 // - advertisement set will be removed 5199 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5200 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5201 bool advertising_uses_random_address = 5202 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5203 advertising_connectable; 5204 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5205 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5206 bool advertising_set_random_address_change = 5207 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5208 bool advertising_set_will_be_removed = 5209 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5210 if (advertising_parameter_change || 5211 (advertising_uses_random_address && advertising_set_random_address_change) || 5212 (advertising_enabled == false) || 5213 (advertising_uses_whitelist && whitelist_modification_pending) || 5214 resolving_list_modification_pending || 5215 advertising_set_will_be_removed) { 5216 5217 advertising_stop = true; 5218 advertising_stop_set = advertising_set; 5219 break; 5220 } 5221 } 5222 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5223 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5224 // stop if: 5225 // - it's disabled 5226 // - parameter change required 5227 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5228 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5229 if ((periodic_enabled == false) || periodic_parameter_change){ 5230 periodic_advertising_stop = true; 5231 advertising_stop_set = advertising_set; 5232 } 5233 } 5234 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5235 } 5236 } 5237 #endif 5238 5239 #endif 5240 5241 5242 // Phase 2: stop everything that should be off during modifications 5243 5244 #ifdef ENABLE_LE_CENTRAL 5245 if (scanning_stop){ 5246 hci_stack->le_scanning_active = false; 5247 hci_le_scan_stop(); 5248 return true; 5249 } 5250 5251 if (connecting_stop){ 5252 hci_send_cmd(&hci_le_create_connection_cancel); 5253 return true; 5254 } 5255 5256 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5257 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5258 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5259 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5260 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5261 return true; 5262 } 5263 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5264 if (periodic_sync_stop){ 5265 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5266 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5267 return true; 5268 } 5269 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5270 #endif 5271 #endif 5272 5273 #ifdef ENABLE_LE_PERIPHERAL 5274 if (advertising_stop){ 5275 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5276 if (hci_extended_advertising_supported()) { 5277 uint8_t advertising_stop_handle; 5278 if (advertising_stop_set != NULL){ 5279 advertising_stop_handle = advertising_stop_set->advertising_handle; 5280 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5281 } else { 5282 advertising_stop_handle = 0; 5283 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5284 } 5285 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5286 const uint16_t durations[] = { 0 }; 5287 const uint16_t max_events[] = { 0 }; 5288 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5289 } else 5290 #endif 5291 { 5292 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5293 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5294 } 5295 return true; 5296 } 5297 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5298 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5299 if (periodic_advertising_stop){ 5300 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5301 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5302 return true; 5303 } 5304 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5305 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5306 #endif 5307 5308 // Phase 3: modify 5309 5310 if (random_address_change){ 5311 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5312 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5313 if (hci_extended_advertising_supported()) { 5314 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5315 } 5316 #endif 5317 { 5318 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5319 } 5320 return true; 5321 } 5322 5323 #ifdef ENABLE_LE_CENTRAL 5324 if (hci_stack->le_scanning_param_update){ 5325 hci_stack->le_scanning_param_update = false; 5326 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5327 if (hci_extended_advertising_supported()){ 5328 // prepare arrays for all PHYs 5329 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5330 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5331 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5332 uint8_t scanning_phys = 1; // LE 1M PHY 5333 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5334 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5335 } else 5336 #endif 5337 { 5338 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5339 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5340 } 5341 return true; 5342 } 5343 #endif 5344 5345 #ifdef ENABLE_LE_PERIPHERAL 5346 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5347 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5348 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5349 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5350 if (hci_extended_advertising_supported()){ 5351 // map advertisment type to advertising event properties 5352 uint16_t adv_event_properties = 0; 5353 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5354 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5355 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5356 } 5357 hci_stack->le_advertising_set_in_current_command = 0; 5358 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5359 0, 5360 adv_event_properties, 5361 hci_stack->le_advertisements_interval_min, 5362 hci_stack->le_advertisements_interval_max, 5363 hci_stack->le_advertisements_channel_map, 5364 hci_stack->le_advertisements_own_addr_type, 5365 hci_stack->le_advertisements_direct_address_type, 5366 hci_stack->le_advertisements_direct_address, 5367 hci_stack->le_advertisements_filter_policy, 5368 0x7f, // tx power: no preference 5369 0x01, // primary adv phy: LE 1M 5370 0, // secondary adv max skip 5371 0, // secondary adv phy 5372 0, // adv sid 5373 0 // scan request notification 5374 ); 5375 } 5376 #endif 5377 { 5378 hci_send_cmd(&hci_le_set_advertising_parameters, 5379 hci_stack->le_advertisements_interval_min, 5380 hci_stack->le_advertisements_interval_max, 5381 hci_stack->le_advertisements_type, 5382 hci_stack->le_advertisements_own_addr_type, 5383 hci_stack->le_advertisements_direct_address_type, 5384 hci_stack->le_advertisements_direct_address, 5385 hci_stack->le_advertisements_channel_map, 5386 hci_stack->le_advertisements_filter_policy); 5387 } 5388 return true; 5389 } 5390 5391 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5392 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5393 uint8_t adv_data_clean[31]; 5394 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5395 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5396 hci_stack->le_advertisements_data_len); 5397 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5398 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5399 if (hci_extended_advertising_supported()){ 5400 hci_stack->le_advertising_set_in_current_command = 0; 5401 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5402 } else 5403 #endif 5404 { 5405 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5406 } 5407 return true; 5408 } 5409 5410 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5411 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5412 uint8_t scan_data_clean[31]; 5413 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5414 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5415 hci_stack->le_scan_response_data_len); 5416 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5417 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5418 if (hci_extended_advertising_supported()){ 5419 hci_stack->le_advertising_set_in_current_command = 0; 5420 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5421 } else 5422 #endif 5423 { 5424 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5425 } 5426 return true; 5427 } 5428 5429 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5430 if (hci_extended_advertising_supported()) { 5431 btstack_linked_list_iterator_t it; 5432 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5433 while (btstack_linked_list_iterator_has_next(&it)){ 5434 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5435 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5436 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5437 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5438 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5439 return true; 5440 } 5441 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5442 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5443 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5444 return true; 5445 } 5446 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5447 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5448 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5449 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5450 advertising_set->advertising_handle, 5451 advertising_set->extended_params.advertising_event_properties, 5452 advertising_set->extended_params.primary_advertising_interval_min, 5453 advertising_set->extended_params.primary_advertising_interval_max, 5454 advertising_set->extended_params.primary_advertising_channel_map, 5455 advertising_set->extended_params.own_address_type, 5456 advertising_set->extended_params.peer_address_type, 5457 advertising_set->extended_params.peer_address, 5458 advertising_set->extended_params.advertising_filter_policy, 5459 advertising_set->extended_params.advertising_tx_power, 5460 advertising_set->extended_params.primary_advertising_phy, 5461 advertising_set->extended_params.secondary_advertising_max_skip, 5462 advertising_set->extended_params.secondary_advertising_phy, 5463 advertising_set->extended_params.advertising_sid, 5464 advertising_set->extended_params.scan_request_notification_enable 5465 ); 5466 return true; 5467 } 5468 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5469 uint16_t pos = advertising_set->adv_data_pos; 5470 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5471 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5472 if ((operation & 0x02) != 0){ 5473 // last fragment or complete data 5474 operation |= 2; 5475 advertising_set->adv_data_pos = 0; 5476 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5477 } else { 5478 advertising_set->adv_data_pos += data_to_upload; 5479 } 5480 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5481 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5482 return true; 5483 } 5484 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5485 uint16_t pos = advertising_set->scan_data_pos; 5486 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5487 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5488 if ((operation & 0x02) != 0){ 5489 advertising_set->scan_data_pos = 0; 5490 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5491 } else { 5492 advertising_set->scan_data_pos += data_to_upload; 5493 } 5494 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5495 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5496 return true; 5497 } 5498 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5499 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5500 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5501 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5502 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5503 advertising_set->advertising_handle, 5504 advertising_set->periodic_params.periodic_advertising_interval_min, 5505 advertising_set->periodic_params.periodic_advertising_interval_max, 5506 advertising_set->periodic_params.periodic_advertising_properties); 5507 return true; 5508 } 5509 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5510 uint16_t pos = advertising_set->periodic_data_pos; 5511 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5512 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5513 if ((operation & 0x02) != 0){ 5514 // last fragment or complete data 5515 operation |= 2; 5516 advertising_set->periodic_data_pos = 0; 5517 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5518 } else { 5519 advertising_set->periodic_data_pos += data_to_upload; 5520 } 5521 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5522 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5523 return true; 5524 } 5525 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5526 } 5527 } 5528 #endif 5529 5530 #endif 5531 5532 #ifdef ENABLE_LE_CENTRAL 5533 // if connect with whitelist was active and is not cancelled yet, wait until next time 5534 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5535 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5536 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 5537 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 5538 #endif 5539 #endif 5540 5541 // LE Whitelist Management 5542 if (whitelist_modification_pending){ 5543 // add/remove entries 5544 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5545 while (btstack_linked_list_iterator_has_next(&lit)){ 5546 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5547 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5548 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5549 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5550 return true; 5551 } 5552 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5553 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5554 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5555 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5556 return true; 5557 } 5558 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5559 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5560 btstack_memory_whitelist_entry_free(entry); 5561 } 5562 } 5563 } 5564 5565 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5566 // LE Resolving List Management 5567 if (resolving_list_supported) { 5568 uint16_t i; 5569 switch (hci_stack->le_resolving_list_state) { 5570 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5571 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5572 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5573 return true; 5574 case LE_RESOLVING_LIST_READ_SIZE: 5575 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5576 hci_send_cmd(&hci_le_read_resolving_list_size); 5577 return true; 5578 case LE_RESOLVING_LIST_SEND_CLEAR: 5579 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5580 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5581 sizeof(hci_stack->le_resolving_list_add_entries)); 5582 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5583 sizeof(hci_stack->le_resolving_list_remove_entries)); 5584 hci_send_cmd(&hci_le_clear_resolving_list); 5585 return true; 5586 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5587 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5588 uint8_t offset = i >> 3; 5589 uint8_t mask = 1 << (i & 7); 5590 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5591 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5592 bd_addr_t peer_identity_addreses; 5593 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5594 sm_key_t peer_irk; 5595 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5596 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5597 5598 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5599 // trigger whitelist entry 'update' (work around for controller bug) 5600 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5601 while (btstack_linked_list_iterator_has_next(&lit)) { 5602 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5603 if (entry->address_type != peer_identity_addr_type) continue; 5604 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5605 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5606 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5607 } 5608 #endif 5609 5610 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5611 peer_identity_addreses); 5612 return true; 5613 } 5614 5615 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5616 5617 /* fall through */ 5618 5619 case LE_RESOLVING_LIST_ADD_ENTRIES: 5620 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5621 uint8_t offset = i >> 3; 5622 uint8_t mask = 1 << (i & 7); 5623 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5624 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5625 bd_addr_t peer_identity_addreses; 5626 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5627 sm_key_t peer_irk; 5628 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5629 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5630 const uint8_t *local_irk = gap_get_persistent_irk(); 5631 // command uses format specifier 'P' that stores 16-byte value without flip 5632 uint8_t local_irk_flipped[16]; 5633 uint8_t peer_irk_flipped[16]; 5634 reverse_128(local_irk, local_irk_flipped); 5635 reverse_128(peer_irk, peer_irk_flipped); 5636 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5637 peer_irk_flipped, local_irk_flipped); 5638 return true; 5639 } 5640 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5641 break; 5642 5643 default: 5644 break; 5645 } 5646 } 5647 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5648 #endif 5649 5650 #ifdef ENABLE_LE_CENTRAL 5651 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5652 // LE Whitelist Management 5653 if (periodic_list_modification_pending){ 5654 // add/remove entries 5655 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5656 while (btstack_linked_list_iterator_has_next(&lit)){ 5657 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5658 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 5659 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 5660 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 5661 return true; 5662 } 5663 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 5664 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 5665 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 5666 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address); 5667 return true; 5668 } 5669 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 5670 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 5671 btstack_memory_periodic_advertiser_list_entry_free(entry); 5672 } 5673 } 5674 } 5675 #endif 5676 #endif 5677 5678 // post-pone all actions until stack is fully working 5679 if (hci_stack->state != HCI_STATE_WORKING) return false; 5680 5681 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5682 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5683 5684 // Phase 4: restore state 5685 5686 #ifdef ENABLE_LE_CENTRAL 5687 // re-start scanning 5688 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5689 hci_stack->le_scanning_active = true; 5690 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5691 if (hci_extended_advertising_supported()){ 5692 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5693 } else 5694 #endif 5695 { 5696 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5697 } 5698 return true; 5699 } 5700 #endif 5701 5702 #ifdef ENABLE_LE_CENTRAL 5703 // re-start connecting 5704 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5705 bd_addr_t null_addr; 5706 memset(null_addr, 0, 6); 5707 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5708 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5709 hci_send_cmd(&hci_le_create_connection, 5710 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5711 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5712 1, // use whitelist 5713 0, // peer address type 5714 null_addr, // peer bd addr 5715 hci_stack->le_connection_own_addr_type, // our addr type: 5716 hci_stack->le_connection_interval_min, // conn interval min 5717 hci_stack->le_connection_interval_max, // conn interval max 5718 hci_stack->le_connection_latency, // conn latency 5719 hci_stack->le_supervision_timeout, // conn latency 5720 hci_stack->le_minimum_ce_length, // min ce length 5721 hci_stack->le_maximum_ce_length // max ce length 5722 ); 5723 return true; 5724 } 5725 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5726 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 5727 switch(hci_stack->le_periodic_sync_request){ 5728 case LE_CONNECTING_DIRECT: 5729 case LE_CONNECTING_WHITELIST: 5730 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 5731 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 5732 hci_stack->le_periodic_sync_options, 5733 hci_stack->le_periodic_sync_advertising_sid, 5734 hci_stack->le_periodic_sync_advertiser_address_type, 5735 hci_stack->le_periodic_sync_advertiser_address, 5736 hci_stack->le_periodic_sync_skip, 5737 hci_stack->le_periodic_sync_timeout, 5738 hci_stack->le_periodic_sync_cte_type); 5739 return true; 5740 default: 5741 break; 5742 } 5743 } 5744 #endif 5745 #endif 5746 5747 #ifdef ENABLE_LE_PERIPHERAL 5748 // re-start advertising 5749 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5750 // check if advertisements should be enabled given 5751 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5752 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5753 5754 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5755 if (hci_extended_advertising_supported()){ 5756 const uint8_t advertising_handles[] = { 0 }; 5757 const uint16_t durations[] = { 0 }; 5758 const uint16_t max_events[] = { 0 }; 5759 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5760 } else 5761 #endif 5762 { 5763 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5764 } 5765 return true; 5766 } 5767 5768 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5769 if (hci_extended_advertising_supported()) { 5770 btstack_linked_list_iterator_t it; 5771 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5772 while (btstack_linked_list_iterator_has_next(&it)) { 5773 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5774 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5775 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5776 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5777 const uint16_t durations[] = { advertising_set->enable_timeout }; 5778 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5779 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5780 return true; 5781 } 5782 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5783 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5784 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5785 uint8_t enable = 1; 5786 if (advertising_set->periodic_include_adi){ 5787 enable |= 2; 5788 } 5789 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5790 return true; 5791 } 5792 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5793 } 5794 } 5795 #endif 5796 #endif 5797 5798 return false; 5799 } 5800 #endif 5801 5802 static bool hci_run_general_pending_commands(void){ 5803 btstack_linked_item_t * it; 5804 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5805 hci_connection_t * connection = (hci_connection_t *) it; 5806 5807 switch(connection->state){ 5808 case SEND_CREATE_CONNECTION: 5809 switch(connection->address_type){ 5810 #ifdef ENABLE_CLASSIC 5811 case BD_ADDR_TYPE_ACL: 5812 log_info("sending hci_create_connection"); 5813 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5814 break; 5815 #endif 5816 default: 5817 #ifdef ENABLE_BLE 5818 #ifdef ENABLE_LE_CENTRAL 5819 log_info("sending hci_le_create_connection"); 5820 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5821 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5822 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5823 if (hci_extended_advertising_supported()) { 5824 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 5825 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 5826 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 5827 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 5828 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 5829 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 5830 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 5831 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 5832 hci_send_cmd(&hci_le_extended_create_connection, 5833 0, // don't use whitelist 5834 hci_stack->le_connection_own_addr_type, // our addr type: 5835 connection->address_type, // peer address type 5836 connection->address, // peer bd addr 5837 1, // initiating PHY - 1M 5838 le_connection_scan_interval, // conn scan interval 5839 le_connection_scan_window, // conn scan windows 5840 le_connection_interval_min, // conn interval min 5841 le_connection_interval_max, // conn interval max 5842 le_connection_latency, // conn latency 5843 le_supervision_timeout, // conn latency 5844 le_minimum_ce_length, // min ce length 5845 le_maximum_ce_length // max ce length 5846 ); } 5847 else 5848 #endif 5849 { 5850 hci_send_cmd(&hci_le_create_connection, 5851 hci_stack->le_connection_scan_interval, // conn scan interval 5852 hci_stack->le_connection_scan_window, // conn scan windows 5853 0, // don't use whitelist 5854 connection->address_type, // peer address type 5855 connection->address, // peer bd addr 5856 hci_stack->le_connection_own_addr_type, // our addr type: 5857 hci_stack->le_connection_interval_min, // conn interval min 5858 hci_stack->le_connection_interval_max, // conn interval max 5859 hci_stack->le_connection_latency, // conn latency 5860 hci_stack->le_supervision_timeout, // conn latency 5861 hci_stack->le_minimum_ce_length, // min ce length 5862 hci_stack->le_maximum_ce_length // max ce length 5863 ); 5864 } 5865 connection->state = SENT_CREATE_CONNECTION; 5866 #endif 5867 #endif 5868 break; 5869 } 5870 return true; 5871 5872 #ifdef ENABLE_CLASSIC 5873 case RECEIVED_CONNECTION_REQUEST: 5874 connection->role = HCI_ROLE_SLAVE; 5875 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5876 log_info("sending hci_accept_connection_request"); 5877 connection->state = ACCEPTED_CONNECTION_REQUEST; 5878 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5879 return true; 5880 } 5881 break; 5882 #endif 5883 5884 #ifdef ENABLE_BLE 5885 #ifdef ENABLE_LE_CENTRAL 5886 case SEND_CANCEL_CONNECTION: 5887 connection->state = SENT_CANCEL_CONNECTION; 5888 hci_send_cmd(&hci_le_create_connection_cancel); 5889 return true; 5890 #endif 5891 #endif 5892 case SEND_DISCONNECT: 5893 connection->state = SENT_DISCONNECT; 5894 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5895 return true; 5896 5897 default: 5898 break; 5899 } 5900 5901 // no further commands if connection is about to get shut down 5902 if (connection->state == SENT_DISCONNECT) continue; 5903 5904 #ifdef ENABLE_CLASSIC 5905 5906 // Handling link key request requires remote supported features 5907 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5908 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5909 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5910 5911 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5912 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5913 if (have_link_key && security_level_sufficient){ 5914 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5915 } else { 5916 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5917 } 5918 return true; 5919 } 5920 5921 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5922 log_info("denying to pin request"); 5923 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5924 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5925 return true; 5926 } 5927 5928 // security assessment requires remote features 5929 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5930 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5931 hci_ssp_assess_security_on_io_cap_request(connection); 5932 // 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 5933 } 5934 5935 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5936 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5937 // set authentication requirements: 5938 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5939 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5940 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5941 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5942 authreq |= 1; 5943 } 5944 bool bonding = hci_stack->bondable; 5945 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5946 // if we have received IO Cap Response, we're in responder role 5947 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5948 if (bonding && !remote_bonding){ 5949 log_info("Remote not bonding, dropping local flag"); 5950 bonding = false; 5951 } 5952 } 5953 if (bonding){ 5954 if (connection->bonding_flags & BONDING_DEDICATED){ 5955 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5956 } else { 5957 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5958 } 5959 } 5960 uint8_t have_oob_data = 0; 5961 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5962 if (connection->classic_oob_c_192 != NULL){ 5963 have_oob_data |= 1; 5964 } 5965 if (connection->classic_oob_c_256 != NULL){ 5966 have_oob_data |= 2; 5967 } 5968 #endif 5969 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5970 return true; 5971 } 5972 5973 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5974 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5975 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5976 return true; 5977 } 5978 5979 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5980 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5981 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5982 const uint8_t zero[16] = { 0 }; 5983 const uint8_t * r_192 = zero; 5984 const uint8_t * c_192 = zero; 5985 const uint8_t * r_256 = zero; 5986 const uint8_t * c_256 = zero; 5987 // verify P-256 OOB 5988 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5989 c_256 = connection->classic_oob_c_256; 5990 if (connection->classic_oob_r_256 != NULL) { 5991 r_256 = connection->classic_oob_r_256; 5992 } 5993 } 5994 // verify P-192 OOB 5995 if ((connection->classic_oob_c_192 != NULL)) { 5996 c_192 = connection->classic_oob_c_192; 5997 if (connection->classic_oob_r_192 != NULL) { 5998 r_192 = connection->classic_oob_r_192; 5999 } 6000 } 6001 6002 // assess security 6003 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6004 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6005 if (need_level_4 && !can_reach_level_4){ 6006 log_info("Level 4 required, but not possible -> abort"); 6007 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6008 // send oob negative reply 6009 c_256 = NULL; 6010 c_192 = NULL; 6011 } 6012 6013 // Reply 6014 if (c_256 != zero) { 6015 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6016 } else if (c_192 != zero){ 6017 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6018 } else { 6019 hci_stack->classic_oob_con_handle = connection->con_handle; 6020 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6021 } 6022 return true; 6023 } 6024 #endif 6025 6026 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6027 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6028 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6029 return true; 6030 } 6031 6032 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6033 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6034 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6035 return true; 6036 } 6037 6038 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6039 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6040 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6041 return true; 6042 } 6043 6044 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6045 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6046 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6047 connection->state = SENT_DISCONNECT; 6048 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6049 return true; 6050 } 6051 6052 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6053 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6054 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6055 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6056 return true; 6057 } 6058 6059 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6060 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6061 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6062 return true; 6063 } 6064 6065 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6066 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6067 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6068 return true; 6069 } 6070 6071 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6072 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6073 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6074 return true; 6075 } 6076 6077 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6078 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6079 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6080 return true; 6081 } 6082 6083 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6084 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6085 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6086 return true; 6087 } 6088 #endif 6089 6090 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6091 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6092 #ifdef ENABLE_CLASSIC 6093 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6094 #endif 6095 if (connection->state != SENT_DISCONNECT){ 6096 connection->state = SENT_DISCONNECT; 6097 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6098 return true; 6099 } 6100 } 6101 6102 #ifdef ENABLE_CLASSIC 6103 uint16_t sniff_min_interval; 6104 switch (connection->sniff_min_interval){ 6105 case 0: 6106 break; 6107 case 0xffff: 6108 connection->sniff_min_interval = 0; 6109 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6110 return true; 6111 default: 6112 sniff_min_interval = connection->sniff_min_interval; 6113 connection->sniff_min_interval = 0; 6114 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6115 return true; 6116 } 6117 6118 if (connection->sniff_subrating_max_latency != 0xffff){ 6119 uint16_t max_latency = connection->sniff_subrating_max_latency; 6120 connection->sniff_subrating_max_latency = 0; 6121 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6122 return true; 6123 } 6124 6125 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6126 uint8_t service_type = (uint8_t) connection->qos_service_type; 6127 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6128 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); 6129 return true; 6130 } 6131 6132 if (connection->request_role != HCI_ROLE_INVALID){ 6133 hci_role_t role = connection->request_role; 6134 connection->request_role = HCI_ROLE_INVALID; 6135 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6136 return true; 6137 } 6138 #endif 6139 6140 if (connection->gap_connection_tasks != 0){ 6141 #ifdef ENABLE_CLASSIC 6142 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6143 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6144 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6145 return true; 6146 } 6147 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6148 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6149 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6150 return true; 6151 } 6152 #endif 6153 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6154 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6155 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6156 return true; 6157 } 6158 } 6159 6160 #ifdef ENABLE_BLE 6161 switch (connection->le_con_parameter_update_state){ 6162 // response to L2CAP CON PARAMETER UPDATE REQUEST 6163 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6164 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6165 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6166 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6167 0x0000, 0xffff); 6168 return true; 6169 case CON_PARAMETER_UPDATE_REPLY: 6170 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6171 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6172 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6173 0x0000, 0xffff); 6174 return true; 6175 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6176 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6177 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6178 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6179 return true; 6180 default: 6181 break; 6182 } 6183 if (connection->le_phy_update_all_phys != 0xffu){ 6184 uint8_t all_phys = connection->le_phy_update_all_phys; 6185 connection->le_phy_update_all_phys = 0xff; 6186 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); 6187 return true; 6188 } 6189 #endif 6190 } 6191 return false; 6192 } 6193 6194 static void hci_run(void){ 6195 6196 // stack state sub statemachines 6197 switch (hci_stack->state) { 6198 case HCI_STATE_INITIALIZING: 6199 hci_initializing_run(); 6200 break; 6201 case HCI_STATE_HALTING: 6202 hci_halting_run(); 6203 break; 6204 case HCI_STATE_FALLING_ASLEEP: 6205 hci_falling_asleep_run(); 6206 break; 6207 default: 6208 break; 6209 } 6210 6211 // allow to run after initialization to working transition 6212 if (hci_stack->state != HCI_STATE_WORKING){ 6213 return; 6214 } 6215 6216 bool done; 6217 6218 // send continuation fragments first, as they block the prepared packet buffer 6219 done = hci_run_acl_fragments(); 6220 if (done) return; 6221 6222 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6223 done = hci_run_iso_fragments(); 6224 if (done) return; 6225 #endif 6226 6227 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6228 // send host num completed packets next as they don't require num_cmd_packets > 0 6229 if (!hci_can_send_comand_packet_transport()) return; 6230 if (hci_stack->host_completed_packets){ 6231 hci_host_num_completed_packets(); 6232 return; 6233 } 6234 #endif 6235 6236 if (!hci_can_send_command_packet_now()) return; 6237 6238 // global/non-connection oriented commands 6239 6240 6241 #ifdef ENABLE_CLASSIC 6242 // general gap classic 6243 done = hci_run_general_gap_classic(); 6244 if (done) return; 6245 #endif 6246 6247 #ifdef ENABLE_BLE 6248 // general gap le 6249 done = hci_run_general_gap_le(); 6250 if (done) return; 6251 #endif 6252 6253 // send pending HCI commands 6254 hci_run_general_pending_commands(); 6255 } 6256 6257 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 6258 // house-keeping 6259 6260 #ifdef ENABLE_CLASSIC 6261 bd_addr_t addr; 6262 hci_connection_t * conn; 6263 #endif 6264 #ifdef ENABLE_LE_CENTRAL 6265 uint8_t initiator_filter_policy; 6266 #endif 6267 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6268 uint8_t i; 6269 uint8_t num_cis; 6270 hci_con_handle_t cis_handle; 6271 uint8_t status; 6272 #endif 6273 6274 uint16_t opcode = little_endian_read_16(packet, 0); 6275 switch (opcode) { 6276 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 6277 hci_stack->loopback_mode = packet[3]; 6278 break; 6279 6280 #ifdef ENABLE_CLASSIC 6281 case HCI_OPCODE_HCI_CREATE_CONNECTION: 6282 reverse_bd_addr(&packet[3], addr); 6283 log_info("Create_connection to %s", bd_addr_to_str(addr)); 6284 6285 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 6286 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 6287 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 6288 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 6289 } 6290 6291 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6292 if (!conn) { 6293 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6294 if (!conn) { 6295 // notify client that alloc failed 6296 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6297 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 6298 } 6299 conn->state = SEND_CREATE_CONNECTION; 6300 conn->role = HCI_ROLE_MASTER; 6301 } 6302 6303 log_info("conn state %u", conn->state); 6304 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 6305 switch (conn->state) { 6306 // if connection active exists 6307 case OPEN: 6308 // and OPEN, emit connection complete command 6309 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 6310 // packet not sent to controller 6311 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6312 case RECEIVED_DISCONNECTION_COMPLETE: 6313 // create connection triggered in disconnect complete event, let's do it now 6314 break; 6315 case SEND_CREATE_CONNECTION: 6316 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 6317 if (hci_classic_operation_active()){ 6318 return ERROR_CODE_SUCCESS; 6319 } 6320 #endif 6321 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 6322 break; 6323 default: 6324 // otherwise, just ignore as it is already in the open process 6325 // packet not sent to controller 6326 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6327 } 6328 conn->state = SENT_CREATE_CONNECTION; 6329 6330 // track outgoing connection 6331 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 6332 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 6333 break; 6334 6335 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 6336 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 6337 // setup_synchronous_connection? Voice setting at offset 22 6338 // TODO: compare to current setting if sco connection already active 6339 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 6340 break; 6341 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 6342 // accept_synchronous_connection? Voice setting at offset 18 6343 // TODO: compare to current setting if sco connection already active 6344 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 6345 // track outgoing connection 6346 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 6347 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 6348 break; 6349 #endif 6350 #endif 6351 6352 #ifdef ENABLE_BLE 6353 #ifdef ENABLE_LE_CENTRAL 6354 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6355 // white list used? 6356 initiator_filter_policy = packet[7]; 6357 switch (initiator_filter_policy) { 6358 case 0: 6359 // whitelist not used 6360 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6361 break; 6362 case 1: 6363 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6364 break; 6365 default: 6366 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6367 break; 6368 } 6369 // track outgoing connection 6370 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6371 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6372 break; 6373 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6374 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6375 break; 6376 #endif 6377 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6378 #ifdef ENABLE_LE_CENTRAL 6379 case HCI_OPCODE_HCI_LE_CREATE_CIS: 6380 status = ERROR_CODE_SUCCESS; 6381 num_cis = packet[3]; 6382 // setup hci_iso_streams 6383 for (i=0;i<num_cis;i++){ 6384 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 4 + (4 * i)); 6385 status = hci_iso_stream_create(cis_handle); 6386 if (status != ERROR_CODE_SUCCESS) { 6387 break; 6388 } 6389 } 6390 // free structs on error 6391 if (status != ERROR_CODE_SUCCESS){ 6392 hci_iso_stream_requested_finalize(); 6393 return status; 6394 } 6395 break; 6396 #endif /* ENABLE_LE_CENTRAL */ 6397 #ifdef ENABLE_LE_PERIPHERAL 6398 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 6399 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 3); 6400 status = hci_iso_stream_create(cis_handle); 6401 if (status != ERROR_CODE_SUCCESS){ 6402 return status; 6403 } 6404 break; 6405 #endif /* ENABLE_LE_PERIPHERAL */ 6406 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6407 #endif /* ENABLE_BLE */ 6408 default: 6409 break; 6410 } 6411 6412 hci_stack->num_cmd_packets--; 6413 6414 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6415 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6416 if (err != 0){ 6417 return ERROR_CODE_HARDWARE_FAILURE; 6418 } 6419 return ERROR_CODE_SUCCESS; 6420 } 6421 6422 // disconnect because of security block 6423 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6424 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6425 if (!connection) return; 6426 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6427 } 6428 6429 6430 // Configure Secure Simple Pairing 6431 6432 #ifdef ENABLE_CLASSIC 6433 6434 // enable will enable SSP during init 6435 void gap_ssp_set_enable(int enable){ 6436 hci_stack->ssp_enable = enable; 6437 } 6438 6439 static int hci_local_ssp_activated(void){ 6440 return gap_ssp_supported() && hci_stack->ssp_enable; 6441 } 6442 6443 // if set, BTstack will respond to io capability request using authentication requirement 6444 void gap_ssp_set_io_capability(int io_capability){ 6445 hci_stack->ssp_io_capability = io_capability; 6446 } 6447 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6448 hci_stack->ssp_authentication_requirement = authentication_requirement; 6449 } 6450 6451 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6452 void gap_ssp_set_auto_accept(int auto_accept){ 6453 hci_stack->ssp_auto_accept = auto_accept; 6454 } 6455 6456 void gap_secure_connections_enable(bool enable){ 6457 hci_stack->secure_connections_enable = enable; 6458 } 6459 bool gap_secure_connections_active(void){ 6460 return hci_stack->secure_connections_active; 6461 } 6462 6463 #endif 6464 6465 // va_list part of hci_send_cmd 6466 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6467 if (!hci_can_send_command_packet_now()){ 6468 log_error("hci_send_cmd called but cannot send packet now"); 6469 return ERROR_CODE_COMMAND_DISALLOWED; 6470 } 6471 6472 // for HCI INITIALIZATION 6473 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6474 hci_stack->last_cmd_opcode = cmd->opcode; 6475 6476 hci_reserve_packet_buffer(); 6477 uint8_t * packet = hci_stack->hci_packet_buffer; 6478 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6479 uint8_t status = hci_send_cmd_packet(packet, size); 6480 6481 // release packet buffer on error or for synchronous transport implementations 6482 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6483 hci_release_packet_buffer(); 6484 hci_emit_transport_packet_sent(); 6485 } 6486 6487 return status; 6488 } 6489 6490 /** 6491 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6492 */ 6493 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6494 va_list argptr; 6495 va_start(argptr, cmd); 6496 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6497 va_end(argptr); 6498 return status; 6499 } 6500 6501 // Create various non-HCI events. 6502 // TODO: generalize, use table similar to hci_create_command 6503 6504 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6505 // dump packet 6506 if (dump) { 6507 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 6508 } 6509 6510 // dispatch to all event handlers 6511 btstack_linked_list_iterator_t it; 6512 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6513 while (btstack_linked_list_iterator_has_next(&it)){ 6514 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6515 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6516 } 6517 } 6518 6519 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6520 if (!hci_stack->acl_packet_handler) return; 6521 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6522 } 6523 6524 #ifdef ENABLE_CLASSIC 6525 static void hci_notify_if_sco_can_send_now(void){ 6526 // notify SCO sender if waiting 6527 if (!hci_stack->sco_waiting_for_can_send_now) return; 6528 if (hci_can_send_sco_packet_now()){ 6529 hci_stack->sco_waiting_for_can_send_now = 0; 6530 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6531 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6532 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6533 } 6534 } 6535 6536 // parsing end emitting has been merged to reduce code size 6537 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6538 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6539 6540 uint8_t * eir_data; 6541 ad_context_t context; 6542 const uint8_t * name; 6543 uint8_t name_len; 6544 6545 if (size < 3) return; 6546 6547 int event_type = hci_event_packet_get_type(packet); 6548 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6549 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6550 6551 switch (event_type){ 6552 case HCI_EVENT_INQUIRY_RESULT: 6553 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6554 if (size != (3 + (num_responses * 14))) return; 6555 break; 6556 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6557 if (size != 257) return; 6558 if (num_responses != 1) return; 6559 break; 6560 default: 6561 return; 6562 } 6563 6564 // event[1] is set at the end 6565 int i; 6566 for (i=0; i<num_responses;i++){ 6567 memset(event, 0, sizeof(event)); 6568 event[0] = GAP_EVENT_INQUIRY_RESULT; 6569 uint8_t event_size = 27; // if name is not set by EIR 6570 6571 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6572 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6573 (void)memcpy(&event[9], 6574 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6575 3); // class of device 6576 (void)memcpy(&event[12], 6577 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6578 2); // clock offset 6579 6580 switch (event_type){ 6581 case HCI_EVENT_INQUIRY_RESULT: 6582 // 14,15,16,17 = 0, size 18 6583 break; 6584 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6585 event[14] = 1; 6586 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6587 // 16,17 = 0, size 18 6588 break; 6589 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6590 event[14] = 1; 6591 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6592 // EIR packets only contain a single inquiry response 6593 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6594 name = NULL; 6595 // Iterate over EIR data 6596 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6597 uint8_t data_type = ad_iterator_get_data_type(&context); 6598 uint8_t data_size = ad_iterator_get_data_len(&context); 6599 const uint8_t * data = ad_iterator_get_data(&context); 6600 // Prefer Complete Local Name over Shortened Local Name 6601 switch (data_type){ 6602 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6603 if (name) continue; 6604 /* fall through */ 6605 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6606 name = data; 6607 name_len = data_size; 6608 break; 6609 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6610 if (data_size != 8) break; 6611 event[16] = 1; 6612 memcpy(&event[17], data, 8); 6613 break; 6614 default: 6615 break; 6616 } 6617 } 6618 if (name){ 6619 event[25] = 1; 6620 // truncate name if needed 6621 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6622 event[26] = len; 6623 (void)memcpy(&event[27], name, len); 6624 event_size += len; 6625 } 6626 break; 6627 default: 6628 return; 6629 } 6630 event[1] = event_size - 2; 6631 hci_emit_event(event, event_size, 1); 6632 } 6633 } 6634 #endif 6635 6636 void hci_emit_state(void){ 6637 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6638 uint8_t event[3]; 6639 event[0] = BTSTACK_EVENT_STATE; 6640 event[1] = sizeof(event) - 2u; 6641 event[2] = hci_stack->state; 6642 hci_emit_event(event, sizeof(event), 1); 6643 } 6644 6645 #ifdef ENABLE_CLASSIC 6646 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6647 uint8_t event[13]; 6648 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6649 event[1] = sizeof(event) - 2; 6650 event[2] = status; 6651 little_endian_store_16(event, 3, con_handle); 6652 reverse_bd_addr(address, &event[5]); 6653 event[11] = 1; // ACL connection 6654 event[12] = 0; // encryption disabled 6655 hci_emit_event(event, sizeof(event), 1); 6656 } 6657 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6658 if (disable_l2cap_timeouts) return; 6659 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6660 uint8_t event[4]; 6661 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6662 event[1] = sizeof(event) - 2; 6663 little_endian_store_16(event, 2, conn->con_handle); 6664 hci_emit_event(event, sizeof(event), 1); 6665 } 6666 #endif 6667 6668 #ifdef ENABLE_BLE 6669 #ifdef ENABLE_LE_CENTRAL 6670 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){ 6671 uint8_t event[21]; 6672 event[0] = HCI_EVENT_LE_META; 6673 event[1] = sizeof(event) - 2u; 6674 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6675 event[3] = status; 6676 little_endian_store_16(event, 4, con_handle); 6677 event[6] = 0; // TODO: role 6678 event[7] = address_type; 6679 reverse_bd_addr(address, &event[8]); 6680 little_endian_store_16(event, 14, 0); // interval 6681 little_endian_store_16(event, 16, 0); // latency 6682 little_endian_store_16(event, 18, 0); // supervision timeout 6683 event[20] = 0; // master clock accuracy 6684 hci_emit_event(event, sizeof(event), 1); 6685 } 6686 #endif 6687 #endif 6688 6689 static void hci_emit_transport_packet_sent(void){ 6690 // notify upper stack that it might be possible to send again 6691 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6692 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6693 } 6694 6695 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6696 uint8_t event[6]; 6697 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6698 event[1] = sizeof(event) - 2u; 6699 event[2] = 0; // status = OK 6700 little_endian_store_16(event, 3, con_handle); 6701 event[5] = reason; 6702 hci_emit_event(event, sizeof(event), 1); 6703 } 6704 6705 static void hci_emit_nr_connections_changed(void){ 6706 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6707 uint8_t event[3]; 6708 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6709 event[1] = sizeof(event) - 2u; 6710 event[2] = nr_hci_connections(); 6711 hci_emit_event(event, sizeof(event), 1); 6712 } 6713 6714 static void hci_emit_hci_open_failed(void){ 6715 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6716 uint8_t event[2]; 6717 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6718 event[1] = sizeof(event) - 2u; 6719 hci_emit_event(event, sizeof(event), 1); 6720 } 6721 6722 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6723 log_info("hci_emit_dedicated_bonding_result %u ", status); 6724 uint8_t event[9]; 6725 int pos = 0; 6726 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6727 event[pos++] = sizeof(event) - 2u; 6728 event[pos++] = status; 6729 reverse_bd_addr(address, &event[pos]); 6730 hci_emit_event(event, sizeof(event), 1); 6731 } 6732 6733 6734 #ifdef ENABLE_CLASSIC 6735 6736 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6737 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6738 uint8_t event[5]; 6739 int pos = 0; 6740 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6741 event[pos++] = sizeof(event) - 2; 6742 little_endian_store_16(event, 2, con_handle); 6743 pos += 2; 6744 event[pos++] = level; 6745 hci_emit_event(event, sizeof(event), 1); 6746 } 6747 6748 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6749 if (!connection) return LEVEL_0; 6750 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6751 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6752 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6753 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6754 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6755 // LEVEL 4 always requires 128 bit encrytion key size 6756 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6757 security_level = LEVEL_3; 6758 } 6759 return security_level; 6760 } 6761 6762 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6763 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6764 uint8_t event[3]; 6765 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6766 event[1] = sizeof(event) - 2; 6767 event[2] = enabled; 6768 hci_emit_event(event, sizeof(event), 1); 6769 } 6770 6771 // query if remote side supports eSCO 6772 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6773 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6774 if (!connection) return false; 6775 return (connection->remote_supported_features[0] & 1) != 0; 6776 } 6777 6778 static bool hci_ssp_supported(hci_connection_t * connection){ 6779 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6780 return (connection->bonding_flags & mask) == mask; 6781 } 6782 6783 // query if remote side supports SSP 6784 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6785 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6786 if (!connection) return false; 6787 return hci_ssp_supported(connection) ? 1 : 0; 6788 } 6789 6790 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6791 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6792 } 6793 6794 /** 6795 * Check if remote supported features query has completed 6796 */ 6797 bool hci_remote_features_available(hci_con_handle_t handle){ 6798 hci_connection_t * connection = hci_connection_for_handle(handle); 6799 if (!connection) return false; 6800 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6801 } 6802 6803 /** 6804 * Trigger remote supported features query 6805 */ 6806 6807 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6808 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6809 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6810 } 6811 } 6812 6813 void hci_remote_features_query(hci_con_handle_t con_handle){ 6814 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6815 if (!connection) return; 6816 hci_trigger_remote_features_for_connection(connection); 6817 hci_run(); 6818 } 6819 6820 // GAP API 6821 /** 6822 * @bbrief enable/disable bonding. default is enabled 6823 * @praram enabled 6824 */ 6825 void gap_set_bondable_mode(int enable){ 6826 hci_stack->bondable = enable ? 1 : 0; 6827 } 6828 /** 6829 * @brief Get bondable mode. 6830 * @return 1 if bondable 6831 */ 6832 int gap_get_bondable_mode(void){ 6833 return hci_stack->bondable; 6834 } 6835 6836 /** 6837 * @brief map link keys to security levels 6838 */ 6839 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6840 switch (link_key_type){ 6841 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6842 return LEVEL_4; 6843 case COMBINATION_KEY: 6844 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6845 return LEVEL_3; 6846 default: 6847 return LEVEL_2; 6848 } 6849 } 6850 6851 /** 6852 * @brief map link keys to secure connection yes/no 6853 */ 6854 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6855 switch (link_key_type){ 6856 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6857 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6858 return true; 6859 default: 6860 return false; 6861 } 6862 } 6863 6864 /** 6865 * @brief map link keys to authenticated 6866 */ 6867 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6868 switch (link_key_type){ 6869 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6870 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6871 return true; 6872 default: 6873 return false; 6874 } 6875 } 6876 6877 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6878 log_info("gap_mitm_protection_required_for_security_level %u", level); 6879 return level > LEVEL_2; 6880 } 6881 6882 /** 6883 * @brief get current security level 6884 */ 6885 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6886 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6887 if (!connection) return LEVEL_0; 6888 return gap_security_level_for_connection(connection); 6889 } 6890 6891 /** 6892 * @brief request connection to device to 6893 * @result GAP_AUTHENTICATION_RESULT 6894 */ 6895 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6896 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6897 if (!connection){ 6898 hci_emit_security_level(con_handle, LEVEL_0); 6899 return; 6900 } 6901 6902 btstack_assert(hci_is_le_connection(connection) == false); 6903 6904 // 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) 6905 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6906 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6907 requested_level = LEVEL_4; 6908 } 6909 6910 gap_security_level_t current_level = gap_security_level(con_handle); 6911 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6912 requested_level, connection->requested_security_level, current_level); 6913 6914 // authentication active if authentication request was sent or planned level > 0 6915 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6916 if (authentication_active){ 6917 // authentication already active 6918 if (connection->requested_security_level < requested_level){ 6919 // increase requested level as new level is higher 6920 // TODO: handle re-authentication when done 6921 connection->requested_security_level = requested_level; 6922 } 6923 } else { 6924 // no request active, notify if security sufficient 6925 if (requested_level <= current_level){ 6926 hci_emit_security_level(con_handle, current_level); 6927 return; 6928 } 6929 6930 // store request 6931 connection->requested_security_level = requested_level; 6932 6933 // request remote features if not already active 6934 hci_remote_features_query(con_handle); 6935 6936 // start to authenticate connection 6937 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6938 hci_run(); 6939 } 6940 } 6941 6942 /** 6943 * @brief start dedicated bonding with device. disconnect after bonding 6944 * @param device 6945 * @param request MITM protection 6946 * @result GAP_DEDICATED_BONDING_COMPLETE 6947 */ 6948 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6949 6950 // create connection state machine 6951 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6952 6953 if (!connection){ 6954 return BTSTACK_MEMORY_ALLOC_FAILED; 6955 } 6956 6957 // delete linkn key 6958 gap_drop_link_key_for_bd_addr(device); 6959 6960 // configure LEVEL_2/3, dedicated bonding 6961 connection->state = SEND_CREATE_CONNECTION; 6962 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6963 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6964 connection->bonding_flags = BONDING_DEDICATED; 6965 6966 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6967 6968 // handle: connnection failure (connection complete != ok) 6969 // handle: authentication failure 6970 // handle: disconnect on done 6971 6972 hci_run(); 6973 6974 return 0; 6975 } 6976 6977 void gap_set_local_name(const char * local_name){ 6978 hci_stack->local_name = local_name; 6979 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6980 // also update EIR if not set by user 6981 if (hci_stack->eir_data == NULL){ 6982 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6983 } 6984 hci_run(); 6985 } 6986 #endif 6987 6988 6989 #ifdef ENABLE_BLE 6990 6991 #ifdef ENABLE_LE_CENTRAL 6992 void gap_start_scan(void){ 6993 hci_stack->le_scanning_enabled = true; 6994 hci_run(); 6995 } 6996 6997 void gap_stop_scan(void){ 6998 hci_stack->le_scanning_enabled = false; 6999 hci_run(); 7000 } 7001 7002 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7003 hci_stack->le_scan_type = scan_type; 7004 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7005 hci_stack->le_scan_interval = scan_interval; 7006 hci_stack->le_scan_window = scan_window; 7007 hci_stack->le_scanning_param_update = true; 7008 hci_run(); 7009 } 7010 7011 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7012 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7013 } 7014 7015 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7016 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7017 if (!conn){ 7018 // disallow if le connection is already outgoing 7019 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7020 log_error("le connection already active"); 7021 return ERROR_CODE_COMMAND_DISALLOWED; 7022 } 7023 7024 log_info("gap_connect: no connection exists yet, creating context"); 7025 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7026 if (!conn){ 7027 // notify client that alloc failed 7028 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7029 log_info("gap_connect: failed to alloc hci_connection_t"); 7030 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7031 } 7032 7033 // set le connecting state 7034 if (hci_is_le_connection_type(addr_type)){ 7035 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7036 } 7037 7038 conn->state = SEND_CREATE_CONNECTION; 7039 log_info("gap_connect: send create connection next"); 7040 hci_run(); 7041 return ERROR_CODE_SUCCESS; 7042 } 7043 7044 if (!hci_is_le_connection(conn) || 7045 (conn->state == SEND_CREATE_CONNECTION) || 7046 (conn->state == SENT_CREATE_CONNECTION)) { 7047 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7048 log_error("gap_connect: classic connection or connect is already being created"); 7049 return GATT_CLIENT_IN_WRONG_STATE; 7050 } 7051 7052 // check if connection was just disconnected 7053 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7054 log_info("gap_connect: send create connection (again)"); 7055 conn->state = SEND_CREATE_CONNECTION; 7056 hci_run(); 7057 return ERROR_CODE_SUCCESS; 7058 } 7059 7060 log_info("gap_connect: context exists with state %u", conn->state); 7061 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7062 hci_run(); 7063 return ERROR_CODE_SUCCESS; 7064 } 7065 7066 // @assumption: only a single outgoing LE Connection exists 7067 static hci_connection_t * gap_get_outgoing_connection(void){ 7068 btstack_linked_item_t *it; 7069 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7070 hci_connection_t * conn = (hci_connection_t *) it; 7071 if (!hci_is_le_connection(conn)) continue; 7072 switch (conn->state){ 7073 case SEND_CREATE_CONNECTION: 7074 case SENT_CREATE_CONNECTION: 7075 case SENT_CANCEL_CONNECTION: 7076 return conn; 7077 default: 7078 break; 7079 }; 7080 } 7081 return NULL; 7082 } 7083 7084 uint8_t gap_connect_cancel(void){ 7085 hci_connection_t * conn = gap_get_outgoing_connection(); 7086 if (!conn) return 0; 7087 switch (conn->state){ 7088 case SEND_CREATE_CONNECTION: 7089 // skip sending create connection and emit event instead 7090 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7091 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7092 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7093 btstack_memory_hci_connection_free( conn ); 7094 break; 7095 case SENT_CREATE_CONNECTION: 7096 // request to send cancel connection 7097 conn->state = SEND_CANCEL_CONNECTION; 7098 hci_run(); 7099 break; 7100 default: 7101 break; 7102 } 7103 return 0; 7104 } 7105 7106 /** 7107 * @brief Set connection parameters for outgoing connections 7108 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7109 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7110 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7111 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7112 * @param conn_latency, default: 4 7113 * @param supervision_timeout (unit: 10ms), default: 720 ms 7114 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7115 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7116 */ 7117 7118 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7119 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7120 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7121 hci_stack->le_connection_scan_interval = conn_scan_interval; 7122 hci_stack->le_connection_scan_window = conn_scan_window; 7123 hci_stack->le_connection_interval_min = conn_interval_min; 7124 hci_stack->le_connection_interval_max = conn_interval_max; 7125 hci_stack->le_connection_latency = conn_latency; 7126 hci_stack->le_supervision_timeout = supervision_timeout; 7127 hci_stack->le_minimum_ce_length = min_ce_length; 7128 hci_stack->le_maximum_ce_length = max_ce_length; 7129 } 7130 #endif 7131 7132 /** 7133 * @brief Updates the connection parameters for a given LE connection 7134 * @param handle 7135 * @param conn_interval_min (unit: 1.25ms) 7136 * @param conn_interval_max (unit: 1.25ms) 7137 * @param conn_latency 7138 * @param supervision_timeout (unit: 10ms) 7139 * @return 0 if ok 7140 */ 7141 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7142 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7143 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7144 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7145 connection->le_conn_interval_min = conn_interval_min; 7146 connection->le_conn_interval_max = conn_interval_max; 7147 connection->le_conn_latency = conn_latency; 7148 connection->le_supervision_timeout = supervision_timeout; 7149 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7150 hci_run(); 7151 return 0; 7152 } 7153 7154 /** 7155 * @brief Request an update of the connection parameter for a given LE connection 7156 * @param handle 7157 * @param conn_interval_min (unit: 1.25ms) 7158 * @param conn_interval_max (unit: 1.25ms) 7159 * @param conn_latency 7160 * @param supervision_timeout (unit: 10ms) 7161 * @return 0 if ok 7162 */ 7163 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7164 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7165 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7166 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7167 connection->le_conn_interval_min = conn_interval_min; 7168 connection->le_conn_interval_max = conn_interval_max; 7169 connection->le_conn_latency = conn_latency; 7170 connection->le_supervision_timeout = supervision_timeout; 7171 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7172 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7173 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7174 return 0; 7175 } 7176 7177 #ifdef ENABLE_LE_PERIPHERAL 7178 7179 /** 7180 * @brief Set Advertisement Data 7181 * @param advertising_data_length 7182 * @param advertising_data (max 31 octets) 7183 * @note data is not copied, pointer has to stay valid 7184 */ 7185 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7186 hci_stack->le_advertisements_data_len = advertising_data_length; 7187 hci_stack->le_advertisements_data = advertising_data; 7188 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7189 hci_run(); 7190 } 7191 7192 /** 7193 * @brief Set Scan Response Data 7194 * @param advertising_data_length 7195 * @param advertising_data (max 31 octets) 7196 * @note data is not copied, pointer has to stay valid 7197 */ 7198 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7199 hci_stack->le_scan_response_data_len = scan_response_data_length; 7200 hci_stack->le_scan_response_data = scan_response_data; 7201 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7202 hci_run(); 7203 } 7204 7205 /** 7206 * @brief Set Advertisement Parameters 7207 * @param adv_int_min 7208 * @param adv_int_max 7209 * @param adv_type 7210 * @param direct_address_type 7211 * @param direct_address 7212 * @param channel_map 7213 * @param filter_policy 7214 * 7215 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7216 */ 7217 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7218 uint8_t direct_address_typ, bd_addr_t direct_address, 7219 uint8_t channel_map, uint8_t filter_policy) { 7220 7221 hci_stack->le_advertisements_interval_min = adv_int_min; 7222 hci_stack->le_advertisements_interval_max = adv_int_max; 7223 hci_stack->le_advertisements_type = adv_type; 7224 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7225 hci_stack->le_advertisements_channel_map = channel_map; 7226 hci_stack->le_advertisements_filter_policy = filter_policy; 7227 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7228 6); 7229 7230 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7231 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7232 hci_run(); 7233 } 7234 7235 /** 7236 * @brief Enable/Disable Advertisements 7237 * @param enabled 7238 */ 7239 void gap_advertisements_enable(int enabled){ 7240 if (enabled == 0){ 7241 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7242 } else { 7243 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 7244 } 7245 hci_update_advertisements_enabled_for_current_roles(); 7246 hci_run(); 7247 } 7248 7249 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7250 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 7251 btstack_linked_list_iterator_t it; 7252 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 7253 while (btstack_linked_list_iterator_has_next(&it)){ 7254 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 7255 if ( item->advertising_handle == advertising_handle ) { 7256 return item; 7257 } 7258 } 7259 return NULL; 7260 } 7261 7262 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 7263 // find free advertisement handle 7264 uint8_t advertisement_handle; 7265 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 7266 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 7267 } 7268 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 7269 // clear 7270 memset(storage, 0, sizeof(le_advertising_set_t)); 7271 // copy params 7272 storage->advertising_handle = advertisement_handle; 7273 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7274 // add to list 7275 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 7276 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7277 *out_advertising_handle = advertisement_handle; 7278 // set tasks and start 7279 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7280 hci_run(); 7281 return ERROR_CODE_SUCCESS; 7282 } 7283 7284 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 7285 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7286 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7287 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7288 // set tasks and start 7289 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7290 hci_run(); 7291 return ERROR_CODE_SUCCESS; 7292 } 7293 7294 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 7295 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7296 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7297 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 7298 return ERROR_CODE_SUCCESS; 7299 } 7300 7301 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 7302 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7303 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7304 memcpy(advertising_set->random_address, random_address, 6); 7305 // set tasks and start 7306 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7307 hci_run(); 7308 return ERROR_CODE_SUCCESS; 7309 } 7310 7311 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 7312 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7313 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7314 advertising_set->adv_data = advertising_data; 7315 advertising_set->adv_data_len = advertising_data_length; 7316 // set tasks and start 7317 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7318 hci_run(); 7319 return ERROR_CODE_SUCCESS; 7320 } 7321 7322 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){ 7323 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7324 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7325 advertising_set->scan_data = scan_response_data; 7326 advertising_set->scan_data_len = scan_response_data_length; 7327 // set tasks and start 7328 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7329 hci_run(); 7330 return ERROR_CODE_SUCCESS; 7331 } 7332 7333 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 7334 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7335 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7336 advertising_set->enable_timeout = timeout; 7337 advertising_set->enable_max_scan_events = num_extended_advertising_events; 7338 // set tasks and start 7339 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 7340 hci_run(); 7341 return ERROR_CODE_SUCCESS; 7342 } 7343 7344 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 7345 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7346 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7347 // set tasks and start 7348 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7349 hci_run(); 7350 return ERROR_CODE_SUCCESS; 7351 } 7352 7353 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7354 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7355 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7356 // set tasks and start 7357 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7358 hci_run(); 7359 return ERROR_CODE_SUCCESS; 7360 } 7361 7362 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7363 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 7364 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7365 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7366 // periodic advertising requires neither connectable, scannable, legacy or anonymous 7367 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7368 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 7369 // set tasks and start 7370 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 7371 hci_run(); 7372 return ERROR_CODE_SUCCESS; 7373 } 7374 7375 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 7376 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7377 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7378 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 7379 return ERROR_CODE_SUCCESS; 7380 } 7381 7382 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 7383 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7384 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7385 advertising_set->periodic_data = periodic_data; 7386 advertising_set->periodic_data_len = periodic_data_length; 7387 // set tasks and start 7388 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 7389 hci_run(); 7390 return ERROR_CODE_SUCCESS; 7391 } 7392 7393 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7394 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7395 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7396 // set tasks and start 7397 advertising_set->periodic_include_adi = include_adi; 7398 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7399 hci_run(); 7400 return ERROR_CODE_SUCCESS; 7401 } 7402 7403 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7404 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7405 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7406 // set tasks and start 7407 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7408 hci_run(); 7409 return ERROR_CODE_SUCCESS; 7410 } 7411 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 7412 7413 #endif 7414 7415 #endif 7416 7417 void hci_le_set_own_address_type(uint8_t own_address_type){ 7418 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7419 if (own_address_type == hci_stack->le_own_addr_type) return; 7420 hci_stack->le_own_addr_type = own_address_type; 7421 7422 #ifdef ENABLE_LE_PERIPHERAL 7423 // update advertisement parameters, too 7424 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7425 hci_run(); 7426 #endif 7427 #ifdef ENABLE_LE_CENTRAL 7428 // note: we don't update scan parameters or modify ongoing connection attempts 7429 #endif 7430 } 7431 7432 void hci_le_random_address_set(const bd_addr_t random_address){ 7433 memcpy(hci_stack->le_random_address, random_address, 6); 7434 hci_stack->le_random_address_set = true; 7435 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7436 hci_run(); 7437 } 7438 7439 #endif 7440 7441 uint8_t gap_disconnect(hci_con_handle_t handle){ 7442 hci_connection_t * conn = hci_connection_for_handle(handle); 7443 if (!conn){ 7444 hci_emit_disconnection_complete(handle, 0); 7445 return 0; 7446 } 7447 // ignore if already disconnected 7448 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7449 return 0; 7450 } 7451 conn->state = SEND_DISCONNECT; 7452 hci_run(); 7453 return 0; 7454 } 7455 7456 int gap_read_rssi(hci_con_handle_t con_handle){ 7457 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7458 if (hci_connection == NULL) return 0; 7459 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7460 hci_run(); 7461 return 1; 7462 } 7463 7464 /** 7465 * @brief Get connection type 7466 * @param con_handle 7467 * @result connection_type 7468 */ 7469 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7470 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7471 if (!conn) return GAP_CONNECTION_INVALID; 7472 switch (conn->address_type){ 7473 case BD_ADDR_TYPE_LE_PUBLIC: 7474 case BD_ADDR_TYPE_LE_RANDOM: 7475 return GAP_CONNECTION_LE; 7476 case BD_ADDR_TYPE_SCO: 7477 return GAP_CONNECTION_SCO; 7478 case BD_ADDR_TYPE_ACL: 7479 return GAP_CONNECTION_ACL; 7480 default: 7481 return GAP_CONNECTION_INVALID; 7482 } 7483 } 7484 7485 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7486 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7487 if (!conn) return HCI_ROLE_INVALID; 7488 return (hci_role_t) conn->role; 7489 } 7490 7491 7492 #ifdef ENABLE_CLASSIC 7493 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7494 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7495 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7496 conn->request_role = role; 7497 hci_run(); 7498 return ERROR_CODE_SUCCESS; 7499 } 7500 #endif 7501 7502 #ifdef ENABLE_BLE 7503 7504 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){ 7505 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7506 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7507 7508 conn->le_phy_update_all_phys = all_phys; 7509 conn->le_phy_update_tx_phys = tx_phys; 7510 conn->le_phy_update_rx_phys = rx_phys; 7511 conn->le_phy_update_phy_options = phy_options; 7512 7513 hci_run(); 7514 7515 return 0; 7516 } 7517 7518 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7519 // check if already in list 7520 btstack_linked_list_iterator_t it; 7521 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7522 while (btstack_linked_list_iterator_has_next(&it)) { 7523 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7524 if (entry->address_type != address_type) { 7525 continue; 7526 } 7527 if (memcmp(entry->address, address, 6) != 0) { 7528 continue; 7529 } 7530 // disallow if already scheduled to add 7531 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7532 return ERROR_CODE_COMMAND_DISALLOWED; 7533 } 7534 // still on controller, but scheduled to remove -> re-add 7535 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7536 return ERROR_CODE_SUCCESS; 7537 } 7538 // alloc and add to list 7539 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7540 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7541 entry->address_type = address_type; 7542 (void)memcpy(entry->address, address, 6); 7543 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7544 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7545 return ERROR_CODE_SUCCESS; 7546 } 7547 7548 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7549 btstack_linked_list_iterator_t it; 7550 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7551 while (btstack_linked_list_iterator_has_next(&it)){ 7552 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7553 if (entry->address_type != address_type) { 7554 continue; 7555 } 7556 if (memcmp(entry->address, address, 6) != 0) { 7557 continue; 7558 } 7559 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7560 // remove from controller if already present 7561 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7562 } else { 7563 // directly remove entry from whitelist 7564 btstack_linked_list_iterator_remove(&it); 7565 btstack_memory_whitelist_entry_free(entry); 7566 } 7567 return ERROR_CODE_SUCCESS; 7568 } 7569 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7570 } 7571 7572 static void hci_whitelist_clear(void){ 7573 btstack_linked_list_iterator_t it; 7574 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7575 while (btstack_linked_list_iterator_has_next(&it)){ 7576 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7577 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7578 // remove from controller if already present 7579 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7580 continue; 7581 } 7582 // directly remove entry from whitelist 7583 btstack_linked_list_iterator_remove(&it); 7584 btstack_memory_whitelist_entry_free(entry); 7585 } 7586 } 7587 7588 // free all entries unconditionally 7589 static void hci_whitelist_free(void){ 7590 btstack_linked_list_iterator_t lit; 7591 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7592 while (btstack_linked_list_iterator_has_next(&lit)){ 7593 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7594 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7595 btstack_memory_whitelist_entry_free(entry); 7596 } 7597 } 7598 7599 /** 7600 * @brief Clear Whitelist 7601 * @return 0 if ok 7602 */ 7603 uint8_t gap_whitelist_clear(void){ 7604 hci_whitelist_clear(); 7605 hci_run(); 7606 return ERROR_CODE_SUCCESS; 7607 } 7608 7609 /** 7610 * @brief Add Device to Whitelist 7611 * @param address_typ 7612 * @param address 7613 * @return 0 if ok 7614 */ 7615 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7616 uint8_t status = hci_whitelist_add(address_type, address); 7617 if (status){ 7618 return status; 7619 } 7620 hci_run(); 7621 return ERROR_CODE_SUCCESS; 7622 } 7623 7624 /** 7625 * @brief Remove Device from Whitelist 7626 * @param address_typ 7627 * @param address 7628 * @return 0 if ok 7629 */ 7630 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7631 uint8_t status = hci_whitelist_remove(address_type, address); 7632 if (status){ 7633 return status; 7634 } 7635 hci_run(); 7636 return ERROR_CODE_SUCCESS; 7637 } 7638 7639 #ifdef ENABLE_LE_CENTRAL 7640 /** 7641 * @brief Connect with Whitelist 7642 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7643 * @return - if ok 7644 */ 7645 uint8_t gap_connect_with_whitelist(void){ 7646 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7647 return ERROR_CODE_COMMAND_DISALLOWED; 7648 } 7649 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7650 hci_run(); 7651 return ERROR_CODE_SUCCESS; 7652 } 7653 7654 /** 7655 * @brief Auto Connection Establishment - Start Connecting to device 7656 * @param address_typ 7657 * @param address 7658 * @return 0 if ok 7659 */ 7660 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7661 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7662 return ERROR_CODE_COMMAND_DISALLOWED; 7663 } 7664 7665 uint8_t status = hci_whitelist_add(address_type, address); 7666 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7667 return status; 7668 } 7669 7670 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7671 7672 hci_run(); 7673 return ERROR_CODE_SUCCESS; 7674 } 7675 7676 /** 7677 * @brief Auto Connection Establishment - Stop Connecting to device 7678 * @param address_typ 7679 * @param address 7680 * @return 0 if ok 7681 */ 7682 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7683 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7684 return ERROR_CODE_COMMAND_DISALLOWED; 7685 } 7686 7687 hci_whitelist_remove(address_type, address); 7688 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7689 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7690 } 7691 hci_run(); 7692 return 0; 7693 } 7694 7695 /** 7696 * @brief Auto Connection Establishment - Stop everything 7697 * @note Convenience function to stop all active auto connection attempts 7698 */ 7699 uint8_t gap_auto_connection_stop_all(void){ 7700 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7701 return ERROR_CODE_COMMAND_DISALLOWED; 7702 } 7703 hci_whitelist_clear(); 7704 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7705 hci_run(); 7706 return ERROR_CODE_SUCCESS; 7707 } 7708 7709 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7710 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7711 if (!conn) return 0; 7712 return conn->le_connection_interval; 7713 } 7714 #endif 7715 #endif 7716 7717 #ifdef ENABLE_CLASSIC 7718 /** 7719 * @brief Set Extended Inquiry Response data 7720 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7721 * @note has to be done before stack starts up 7722 */ 7723 void gap_set_extended_inquiry_response(const uint8_t * data){ 7724 hci_stack->eir_data = data; 7725 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7726 hci_run(); 7727 } 7728 7729 /** 7730 * @brief Start GAP Classic Inquiry 7731 * @param duration in 1.28s units 7732 * @return 0 if ok 7733 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7734 */ 7735 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7736 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7737 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7738 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7739 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7740 } 7741 hci_stack->inquiry_state = duration_in_1280ms_units; 7742 hci_stack->inquiry_max_period_length = 0; 7743 hci_stack->inquiry_min_period_length = 0; 7744 hci_run(); 7745 return 0; 7746 } 7747 7748 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 7749 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7750 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7751 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7752 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7753 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7754 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7755 7756 hci_stack->inquiry_state = duration; 7757 hci_stack->inquiry_max_period_length = max_period_length; 7758 hci_stack->inquiry_min_period_length = min_period_length; 7759 hci_run(); 7760 return 0; 7761 } 7762 7763 /** 7764 * @brief Stop GAP Classic Inquiry 7765 * @return 0 if ok 7766 */ 7767 int gap_inquiry_stop(void){ 7768 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7769 // emit inquiry complete event, before it even started 7770 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7771 hci_emit_event(event, sizeof(event), 1); 7772 return 0; 7773 } 7774 switch (hci_stack->inquiry_state){ 7775 case GAP_INQUIRY_STATE_ACTIVE: 7776 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7777 hci_run(); 7778 return ERROR_CODE_SUCCESS; 7779 case GAP_INQUIRY_STATE_PERIODIC: 7780 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 7781 hci_run(); 7782 return ERROR_CODE_SUCCESS; 7783 default: 7784 return ERROR_CODE_COMMAND_DISALLOWED; 7785 } 7786 } 7787 7788 void gap_inquiry_set_lap(uint32_t lap){ 7789 hci_stack->inquiry_lap = lap; 7790 } 7791 7792 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7793 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7794 hci_stack->inquiry_scan_window = inquiry_scan_window; 7795 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7796 hci_run(); 7797 } 7798 7799 7800 /** 7801 * @brief Remote Name Request 7802 * @param addr 7803 * @param page_scan_repetition_mode 7804 * @param clock_offset only used when bit 15 is set 7805 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7806 */ 7807 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7808 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7809 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7810 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7811 hci_stack->remote_name_clock_offset = clock_offset; 7812 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7813 hci_run(); 7814 return 0; 7815 } 7816 7817 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7818 hci_stack->gap_pairing_state = state; 7819 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7820 hci_run(); 7821 return 0; 7822 } 7823 7824 /** 7825 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7826 * @param addr 7827 * @param pin_data 7828 * @param pin_len 7829 * @return 0 if ok 7830 */ 7831 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7832 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7833 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7834 hci_stack->gap_pairing_pin_len = pin_len; 7835 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7836 } 7837 7838 /** 7839 * @brief Legacy Pairing Pin Code Response 7840 * @param addr 7841 * @param pin 7842 * @return 0 if ok 7843 */ 7844 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7845 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7846 } 7847 7848 /** 7849 * @brief Abort Legacy Pairing 7850 * @param addr 7851 * @param pin 7852 * @return 0 if ok 7853 */ 7854 int gap_pin_code_negative(bd_addr_t addr){ 7855 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7856 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7857 } 7858 7859 /** 7860 * @brief SSP Passkey Response 7861 * @param addr 7862 * @param passkey 7863 * @return 0 if ok 7864 */ 7865 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7866 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7867 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7868 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7869 } 7870 7871 /** 7872 * @brief Abort SSP Passkey Entry/Pairing 7873 * @param addr 7874 * @param pin 7875 * @return 0 if ok 7876 */ 7877 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7878 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7879 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7880 } 7881 7882 /** 7883 * @brief Accept SSP Numeric Comparison 7884 * @param addr 7885 * @param passkey 7886 * @return 0 if ok 7887 */ 7888 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7889 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7890 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7891 } 7892 7893 /** 7894 * @brief Abort SSP Numeric Comparison/Pairing 7895 * @param addr 7896 * @param pin 7897 * @return 0 if ok 7898 */ 7899 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7900 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7901 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7902 } 7903 7904 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7905 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7906 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7907 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7908 connectionSetAuthenticationFlags(conn, flag); 7909 hci_run(); 7910 return ERROR_CODE_SUCCESS; 7911 } 7912 #endif 7913 7914 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7915 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7916 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7917 } 7918 7919 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7920 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7921 } 7922 #endif 7923 7924 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7925 /** 7926 * @brief Report Remote OOB Data 7927 * @param bd_addr 7928 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7929 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7930 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7931 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7932 */ 7933 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){ 7934 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7935 if (connection == NULL) { 7936 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7937 } 7938 connection->classic_oob_c_192 = c_192; 7939 connection->classic_oob_r_192 = r_192; 7940 7941 // ignore P-256 if not supported by us 7942 if (hci_stack->secure_connections_active){ 7943 connection->classic_oob_c_256 = c_256; 7944 connection->classic_oob_r_256 = r_256; 7945 } 7946 7947 return ERROR_CODE_SUCCESS; 7948 } 7949 /** 7950 * @brief Generate new OOB data 7951 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7952 */ 7953 void gap_ssp_generate_oob_data(void){ 7954 hci_stack->classic_read_local_oob_data = true; 7955 hci_run(); 7956 } 7957 7958 #endif 7959 7960 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7961 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7962 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7963 if (connection == NULL) { 7964 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7965 } 7966 7967 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7968 connection->link_key_type = type; 7969 7970 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7971 } 7972 7973 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7974 /** 7975 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7976 * @param inquiry_mode see bluetooth_defines.h 7977 */ 7978 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7979 hci_stack->inquiry_mode = inquiry_mode; 7980 } 7981 7982 /** 7983 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7984 */ 7985 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7986 hci_stack->sco_voice_setting = voice_setting; 7987 } 7988 7989 /** 7990 * @brief Get SCO Voice Setting 7991 * @return current voice setting 7992 */ 7993 uint16_t hci_get_sco_voice_setting(void){ 7994 return hci_stack->sco_voice_setting; 7995 } 7996 7997 static int hci_have_usb_transport(void){ 7998 if (!hci_stack->hci_transport) return 0; 7999 const char * transport_name = hci_stack->hci_transport->name; 8000 if (!transport_name) return 0; 8001 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8002 } 8003 8004 /** @brief Get SCO packet length for current SCO Voice setting 8005 * @note Using SCO packets of the exact length is required for USB transfer 8006 * @return Length of SCO packets in bytes (not audio frames) 8007 */ 8008 uint16_t hci_get_sco_packet_length(void){ 8009 uint16_t sco_packet_length = 0; 8010 8011 #ifdef ENABLE_SCO_OVER_HCI 8012 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8013 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8014 8015 if (hci_have_usb_transport()){ 8016 // see Core Spec for H2 USB Transfer. 8017 // 3 byte SCO header + 24 bytes per connection 8018 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8019 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8020 } else { 8021 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8022 sco_packet_length = 3 + 60 * multiplier; 8023 // assert that it still fits inside an SCO buffer 8024 if (sco_packet_length > hci_stack->sco_data_packet_length){ 8025 sco_packet_length = 3 + 60; 8026 } 8027 } 8028 #endif 8029 8030 #ifdef HAVE_SCO_TRANSPORT 8031 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8032 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8033 sco_packet_length = 3 + 60 * multiplier; 8034 #endif 8035 return sco_packet_length; 8036 } 8037 8038 /** 8039 * @brief Sets the master/slave policy 8040 * @param policy (0: attempt to become master, 1: let connecting device decide) 8041 */ 8042 void hci_set_master_slave_policy(uint8_t policy){ 8043 hci_stack->master_slave_policy = policy; 8044 } 8045 8046 #endif 8047 8048 HCI_STATE hci_get_state(void){ 8049 return hci_stack->state; 8050 } 8051 8052 #ifdef ENABLE_CLASSIC 8053 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8054 hci_stack->gap_classic_accept_callback = accept_callback; 8055 } 8056 #endif 8057 8058 /** 8059 * @brief Set callback for Bluetooth Hardware Error 8060 */ 8061 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8062 hci_stack->hardware_error_callback = fn; 8063 } 8064 8065 void hci_disconnect_all(void){ 8066 btstack_linked_list_iterator_t it; 8067 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8068 while (btstack_linked_list_iterator_has_next(&it)){ 8069 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8070 if (con->state == SENT_DISCONNECT) continue; 8071 con->state = SEND_DISCONNECT; 8072 } 8073 hci_run(); 8074 } 8075 8076 uint16_t hci_get_manufacturer(void){ 8077 return hci_stack->manufacturer; 8078 } 8079 8080 #ifdef ENABLE_BLE 8081 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8082 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8083 if (!hci_con) return NULL; 8084 return &hci_con->sm_connection; 8085 } 8086 8087 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8088 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8089 #endif 8090 8091 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8092 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8093 if (hci_connection == NULL) return 0; 8094 if (hci_is_le_connection(hci_connection)){ 8095 #ifdef ENABLE_BLE 8096 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8097 if (sm_conn->sm_connection_encrypted) { 8098 return sm_conn->sm_actual_encryption_key_size; 8099 } 8100 #endif 8101 } else { 8102 #ifdef ENABLE_CLASSIC 8103 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8104 return hci_connection->encryption_key_size; 8105 } 8106 #endif 8107 } 8108 return 0; 8109 } 8110 8111 bool gap_authenticated(hci_con_handle_t con_handle){ 8112 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8113 if (hci_connection == NULL) return false; 8114 8115 switch (hci_connection->address_type){ 8116 #ifdef ENABLE_BLE 8117 case BD_ADDR_TYPE_LE_PUBLIC: 8118 case BD_ADDR_TYPE_LE_RANDOM: 8119 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8120 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8121 #endif 8122 #ifdef ENABLE_CLASSIC 8123 case BD_ADDR_TYPE_SCO: 8124 case BD_ADDR_TYPE_ACL: 8125 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8126 #endif 8127 default: 8128 return false; 8129 } 8130 } 8131 8132 bool gap_secure_connection(hci_con_handle_t con_handle){ 8133 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8134 if (hci_connection == NULL) return 0; 8135 8136 switch (hci_connection->address_type){ 8137 #ifdef ENABLE_BLE 8138 case BD_ADDR_TYPE_LE_PUBLIC: 8139 case BD_ADDR_TYPE_LE_RANDOM: 8140 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8141 return hci_connection->sm_connection.sm_connection_sc != 0; 8142 #endif 8143 #ifdef ENABLE_CLASSIC 8144 case BD_ADDR_TYPE_SCO: 8145 case BD_ADDR_TYPE_ACL: 8146 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8147 #endif 8148 default: 8149 return false; 8150 } 8151 } 8152 8153 bool gap_bonded(hci_con_handle_t con_handle){ 8154 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8155 if (hci_connection == NULL) return 0; 8156 8157 #ifdef ENABLE_CLASSIC 8158 link_key_t link_key; 8159 link_key_type_t link_key_type; 8160 #endif 8161 switch (hci_connection->address_type){ 8162 #ifdef ENABLE_BLE 8163 case BD_ADDR_TYPE_LE_PUBLIC: 8164 case BD_ADDR_TYPE_LE_RANDOM: 8165 return hci_connection->sm_connection.sm_le_db_index >= 0; 8166 #endif 8167 #ifdef ENABLE_CLASSIC 8168 case BD_ADDR_TYPE_SCO: 8169 case BD_ADDR_TYPE_ACL: 8170 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8171 #endif 8172 default: 8173 return false; 8174 } 8175 } 8176 8177 #ifdef ENABLE_BLE 8178 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8179 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8180 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8181 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8182 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8183 return sm_conn->sm_connection_authorization_state; 8184 } 8185 #endif 8186 8187 #ifdef ENABLE_CLASSIC 8188 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){ 8189 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8190 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8191 conn->sniff_min_interval = sniff_min_interval; 8192 conn->sniff_max_interval = sniff_max_interval; 8193 conn->sniff_attempt = sniff_attempt; 8194 conn->sniff_timeout = sniff_timeout; 8195 hci_run(); 8196 return 0; 8197 } 8198 8199 /** 8200 * @brief Exit Sniff mode 8201 * @param con_handle 8202 @ @return 0 if ok 8203 */ 8204 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8205 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8206 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8207 conn->sniff_min_interval = 0xffff; 8208 hci_run(); 8209 return 0; 8210 } 8211 8212 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){ 8213 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8214 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8215 conn->sniff_subrating_max_latency = max_latency; 8216 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8217 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8218 hci_run(); 8219 return ERROR_CODE_SUCCESS; 8220 } 8221 8222 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){ 8223 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8224 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8225 conn->qos_service_type = service_type; 8226 conn->qos_token_rate = token_rate; 8227 conn->qos_peak_bandwidth = peak_bandwidth; 8228 conn->qos_latency = latency; 8229 conn->qos_delay_variation = delay_variation; 8230 hci_run(); 8231 return ERROR_CODE_SUCCESS; 8232 } 8233 8234 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 8235 hci_stack->new_page_scan_interval = page_scan_interval; 8236 hci_stack->new_page_scan_window = page_scan_window; 8237 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 8238 hci_run(); 8239 } 8240 8241 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 8242 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 8243 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 8244 hci_run(); 8245 } 8246 8247 void gap_set_page_timeout(uint16_t page_timeout){ 8248 hci_stack->page_timeout = page_timeout; 8249 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 8250 hci_run(); 8251 } 8252 8253 #endif 8254 8255 void hci_halting_defer(void){ 8256 if (hci_stack->state != HCI_STATE_HALTING) return; 8257 switch (hci_stack->substate){ 8258 case HCI_HALTING_READY_FOR_CLOSE: 8259 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 8260 break; 8261 default: 8262 break; 8263 } 8264 } 8265 8266 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 8267 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 8268 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8269 if (le_device_db_index >= le_device_db_max_count()) return; 8270 uint8_t offset = le_device_db_index >> 3; 8271 uint8_t mask = 1 << (le_device_db_index & 7); 8272 hci_stack->le_resolving_list_add_entries[offset] |= mask; 8273 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8274 // note: go back to remove entries, otherwise, a remove + add will skip the add 8275 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8276 } 8277 } 8278 8279 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 8280 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8281 if (le_device_db_index >= le_device_db_max_count()) return; 8282 uint8_t offset = le_device_db_index >> 3; 8283 uint8_t mask = 1 << (le_device_db_index & 7); 8284 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 8285 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8286 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8287 } 8288 } 8289 8290 uint8_t gap_load_resolving_list_from_le_device_db(void){ 8291 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 8292 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 8293 } 8294 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 8295 // restart le resolving list update 8296 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 8297 } 8298 return ERROR_CODE_SUCCESS; 8299 } 8300 #endif 8301 8302 #ifdef ENABLE_BLE 8303 #ifdef ENABLE_LE_CENTRAL 8304 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8305 8306 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8307 // check if already in list 8308 btstack_linked_list_iterator_t it; 8309 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8310 while (btstack_linked_list_iterator_has_next(&it)) { 8311 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 8312 if (entry->sid != advertising_sid) { 8313 continue; 8314 } 8315 if (entry->address_type != address_type) { 8316 continue; 8317 } 8318 if (memcmp(entry->address, address, 6) != 0) { 8319 continue; 8320 } 8321 // disallow if already scheduled to add 8322 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 8323 return ERROR_CODE_COMMAND_DISALLOWED; 8324 } 8325 // still on controller, but scheduled to remove -> re-add 8326 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8327 return ERROR_CODE_SUCCESS; 8328 } 8329 // alloc and add to list 8330 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 8331 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8332 entry->sid = advertising_sid; 8333 entry->address_type = address_type; 8334 (void)memcpy(entry->address, address, 6); 8335 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8336 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 8337 return ERROR_CODE_SUCCESS; 8338 } 8339 8340 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8341 btstack_linked_list_iterator_t it; 8342 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8343 while (btstack_linked_list_iterator_has_next(&it)){ 8344 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8345 if (entry->sid != advertising_sid) { 8346 continue; 8347 } 8348 if (entry->address_type != address_type) { 8349 continue; 8350 } 8351 if (memcmp(entry->address, address, 6) != 0) { 8352 continue; 8353 } 8354 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8355 // remove from controller if already present 8356 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8357 } else { 8358 // directly remove entry from whitelist 8359 btstack_linked_list_iterator_remove(&it); 8360 btstack_memory_periodic_advertiser_list_entry_free(entry); 8361 } 8362 return ERROR_CODE_SUCCESS; 8363 } 8364 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8365 } 8366 8367 static void hci_periodic_advertiser_list_clear(void){ 8368 btstack_linked_list_iterator_t it; 8369 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8370 while (btstack_linked_list_iterator_has_next(&it)){ 8371 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8372 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8373 // remove from controller if already present 8374 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8375 continue; 8376 } 8377 // directly remove entry from whitelist 8378 btstack_linked_list_iterator_remove(&it); 8379 btstack_memory_periodic_advertiser_list_entry_free(entry); 8380 } 8381 } 8382 8383 // free all entries unconditionally 8384 static void hci_periodic_advertiser_list_free(void){ 8385 btstack_linked_list_iterator_t lit; 8386 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 8387 while (btstack_linked_list_iterator_has_next(&lit)){ 8388 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 8389 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 8390 btstack_memory_periodic_advertiser_list_entry_free(entry); 8391 } 8392 } 8393 8394 uint8_t gap_periodic_advertiser_list_clear(void){ 8395 hci_periodic_advertiser_list_clear(); 8396 hci_run(); 8397 return ERROR_CODE_SUCCESS; 8398 } 8399 8400 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8401 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 8402 if (status){ 8403 return status; 8404 } 8405 hci_run(); 8406 return ERROR_CODE_SUCCESS; 8407 } 8408 8409 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8410 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 8411 if (status){ 8412 return status; 8413 } 8414 hci_run(); 8415 return ERROR_CODE_SUCCESS; 8416 } 8417 8418 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 8419 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 8420 // abort if already active 8421 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 8422 return ERROR_CODE_COMMAND_DISALLOWED; 8423 } 8424 // store request 8425 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 8426 hci_stack->le_periodic_sync_options = options; 8427 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 8428 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 8429 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 8430 hci_stack->le_periodic_sync_skip = skip; 8431 hci_stack->le_periodic_sync_timeout = sync_timeout; 8432 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 8433 8434 hci_run(); 8435 return ERROR_CODE_SUCCESS; 8436 } 8437 8438 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 8439 // abort if not requested 8440 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 8441 return ERROR_CODE_COMMAND_DISALLOWED; 8442 } 8443 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 8444 hci_run(); 8445 return ERROR_CODE_SUCCESS; 8446 } 8447 8448 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 8449 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 8450 return ERROR_CODE_COMMAND_DISALLOWED; 8451 } 8452 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 8453 hci_run(); 8454 return ERROR_CODE_SUCCESS; 8455 } 8456 8457 #endif 8458 #endif 8459 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 8460 static uint8_t hci_iso_stream_create(hci_con_handle_t cis_handle){ 8461 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 8462 if (iso_stream == NULL){ 8463 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8464 } else { 8465 iso_stream->state = HCI_ISO_STREAM_STATE_REQUESTED; 8466 iso_stream->con_handle = cis_handle; 8467 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8468 return ERROR_CODE_SUCCESS; 8469 } 8470 } 8471 8472 static hci_iso_stream_t * hci_iso_stream_for_cis_handle(hci_con_handle_t cis_handle){ 8473 btstack_linked_list_iterator_t it; 8474 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8475 while (btstack_linked_list_iterator_has_next(&it)){ 8476 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8477 if ( iso_stream->con_handle == cis_handle ) { 8478 return iso_stream; 8479 } 8480 } 8481 return NULL; 8482 } 8483 8484 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 8485 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8486 btstack_memory_hci_iso_stream_free(iso_stream); 8487 } 8488 8489 static void hci_iso_stream_requested_finalize(void){ 8490 btstack_linked_list_iterator_t it; 8491 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8492 while (btstack_linked_list_iterator_has_next(&it)){ 8493 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8494 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8495 btstack_linked_list_iterator_remove(&it); 8496 btstack_memory_hci_iso_stream_free(iso_stream); 8497 } 8498 } 8499 } 8500 static void hci_iso_stream_requested_confirm(void){ 8501 btstack_linked_list_iterator_t it; 8502 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8503 while (btstack_linked_list_iterator_has_next(&it)){ 8504 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8505 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8506 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 8507 } 8508 } 8509 } 8510 #endif 8511 #endif /* ENABLE_BLE */ 8512 8513 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 8514 void hci_setup_test_connections_fuzz(void){ 8515 hci_connection_t * conn; 8516 8517 // default address: 66:55:44:33:00:01 8518 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 8519 8520 // setup Controller info 8521 hci_stack->num_cmd_packets = 255; 8522 hci_stack->acl_packets_total_num = 255; 8523 8524 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 8525 addr[5] = 0x01; 8526 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8527 conn->con_handle = addr[5]; 8528 conn->role = HCI_ROLE_SLAVE; 8529 conn->state = RECEIVED_CONNECTION_REQUEST; 8530 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8531 8532 // setup incoming Classic SCO connection with con handle 0x0002 8533 addr[5] = 0x02; 8534 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8535 conn->con_handle = addr[5]; 8536 conn->role = HCI_ROLE_SLAVE; 8537 conn->state = RECEIVED_CONNECTION_REQUEST; 8538 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8539 8540 // setup ready Classic ACL connection with con handle 0x0003 8541 addr[5] = 0x03; 8542 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8543 conn->con_handle = addr[5]; 8544 conn->role = HCI_ROLE_SLAVE; 8545 conn->state = OPEN; 8546 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8547 8548 // setup ready Classic SCO connection with con handle 0x0004 8549 addr[5] = 0x04; 8550 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8551 conn->con_handle = addr[5]; 8552 conn->role = HCI_ROLE_SLAVE; 8553 conn->state = OPEN; 8554 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8555 8556 // setup ready LE ACL connection with con handle 0x005 and public address 8557 addr[5] = 0x05; 8558 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 8559 conn->con_handle = addr[5]; 8560 conn->role = HCI_ROLE_SLAVE; 8561 conn->state = OPEN; 8562 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8563 conn->sm_connection.sm_connection_encrypted = 1; 8564 } 8565 8566 void hci_free_connections_fuzz(void){ 8567 btstack_linked_list_iterator_t it; 8568 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8569 while (btstack_linked_list_iterator_has_next(&it)){ 8570 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8571 btstack_linked_list_iterator_remove(&it); 8572 btstack_memory_hci_connection_free(con); 8573 } 8574 } 8575 void hci_simulate_working_fuzz(void){ 8576 hci_stack->le_scanning_param_update = false; 8577 hci_init_done(); 8578 hci_stack->num_cmd_packets = 255; 8579 } 8580 #endif 8581