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_CONTROLLER_DUMP_PACKETS 78 #include <stdio.h> // sprintf 79 #endif 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 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 ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #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." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_MIN_PERIODIC_LEN_MIN 0x02 119 #define GAP_INQUIRY_MAX_PERIODIC_LEN_MIN 0x03 120 #define GAP_INQUIRY_STATE_IDLE 0x00 121 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 122 #define GAP_INQUIRY_STATE_ACTIVE 0x81 123 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 124 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 125 #define GAP_INQUIRY_STATE_PERIODIC 0x84 126 #define GAP_INQUIRY_STATE_W2_EXIT_PERIODIC 0x85 127 128 // GAP Remote Name Request 129 #define GAP_REMOTE_NAME_STATE_IDLE 0 130 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 131 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 132 133 // GAP Pairing 134 #define GAP_PAIRING_STATE_IDLE 0 135 #define GAP_PAIRING_STATE_SEND_PIN 1 136 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 137 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 138 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 139 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 140 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 141 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 142 143 // 144 // compact storage of relevant supported HCI Commands. 145 // X-Macro below provides enumeration and mapping table into the supported 146 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 147 // 148 149 // format: command name, byte offset, bit nr in 64-byte supported commands 150 // currently stored in 32-bit variable 151 #define SUPPORTED_HCI_COMMANDS \ 152 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 153 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 154 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 155 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 156 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 157 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 158 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 159 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 160 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 161 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 162 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 163 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 164 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 165 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 166 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 167 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 168 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 169 170 // enumerate supported commands 171 #define X(name, offset, bit) name, 172 enum { 173 SUPPORTED_HCI_COMMANDS 174 SUPPORTED_HCI_COMMANDS_COUNT 175 }; 176 #undef X 177 178 // prototypes 179 #ifdef ENABLE_CLASSIC 180 static void hci_update_scan_enable(void); 181 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable); 182 static int hci_local_ssp_activated(void); 183 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 184 static bool hci_ssp_supported(hci_connection_t * connection); 185 static void hci_notify_if_sco_can_send_now(void); 186 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 187 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 188 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 189 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 190 static void hci_connection_timestamp(hci_connection_t *connection); 191 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 192 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 193 #endif 194 195 static int hci_power_control_on(void); 196 static void hci_power_control_off(void); 197 static void hci_state_reset(void); 198 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 199 static void hci_emit_transport_packet_sent(void); 200 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 201 static void hci_emit_nr_connections_changed(void); 202 static void hci_emit_hci_open_failed(void); 203 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 204 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 205 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 206 static void hci_run(void); 207 static int hci_is_le_connection(hci_connection_t * connection); 208 209 #ifdef ENABLE_CLASSIC 210 static int hci_have_usb_transport(void); 211 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 212 #endif 213 214 #ifdef ENABLE_BLE 215 static void hci_whitelist_free(void); 216 #ifdef ENABLE_LE_CENTRAL 217 // called from test/ble_client/advertising_data_parser.c 218 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 219 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 220 static hci_connection_t * gap_get_outgoing_connection(void); 221 static void hci_le_scan_stop(void); 222 static bool hci_run_general_gap_le(void); 223 #endif 224 #ifdef ENABLE_LE_PERIPHERAL 225 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 226 static void hci_periodic_advertiser_list_free(void); 227 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 228 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 229 #endif /* ENABLE_LE_PERIPHERAL */ 230 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 231 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id, 232 hci_iso_stream_state_t state); 233 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream); 234 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id); 235 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle); 236 static void hci_iso_stream_requested_finalize(uint8_t big_handle); 237 static void hci_iso_stream_requested_confirm(uint8_t big_handle); 238 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size); 239 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle); 240 static le_audio_cig_t * hci_cig_for_id(uint8_t cig_id); 241 static void hci_iso_notify_can_send_now(void); 242 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status); 243 static void hci_emit_big_terminated(const le_audio_big_t * big); 244 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status); 245 static void hci_emit_big_sync_stopped(uint8_t big_handle); 246 static void hci_emit_cig_created(const le_audio_cig_t * cig, uint8_t status); 247 static void 248 hci_emit_cis_created(uint8_t cig_id, hci_con_handle_t cis_con_handle, uint8_t status); 249 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle); 250 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 251 #endif /* ENABLE_BLE */ 252 253 // the STACK is here 254 #ifndef HAVE_MALLOC 255 static hci_stack_t hci_stack_static; 256 #endif 257 static hci_stack_t * hci_stack = NULL; 258 259 #ifdef ENABLE_CLASSIC 260 // default name 261 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 262 263 // test helper 264 static uint8_t disable_l2cap_timeouts = 0; 265 #endif 266 267 // reset connection state on create and on reconnect 268 // don't overwrite addr, con handle, role 269 static void hci_connection_init(hci_connection_t * conn){ 270 conn->authentication_flags = AUTH_FLAG_NONE; 271 conn->bonding_flags = 0; 272 conn->requested_security_level = LEVEL_0; 273 #ifdef ENABLE_CLASSIC 274 conn->request_role = HCI_ROLE_INVALID; 275 conn->sniff_subrating_max_latency = 0xffff; 276 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 277 conn->link_key_type = INVALID_LINK_KEY; 278 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 279 btstack_run_loop_set_timer_context(&conn->timeout, conn); 280 hci_connection_timestamp(conn); 281 #endif 282 conn->acl_recombination_length = 0; 283 conn->acl_recombination_pos = 0; 284 conn->num_packets_sent = 0; 285 286 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 287 #ifdef ENABLE_BLE 288 conn->le_phy_update_all_phys = 0xff; 289 #endif 290 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 291 conn->le_max_tx_octets = 27; 292 #endif 293 #ifdef ENABLE_CLASSIC_PAIRING_OOB 294 conn->classic_oob_c_192 = NULL; 295 conn->classic_oob_r_192 = NULL; 296 conn->classic_oob_c_256 = NULL; 297 conn->classic_oob_r_256 = NULL; 298 #endif 299 } 300 301 /** 302 * create connection for given address 303 * 304 * @return connection OR NULL, if no memory left 305 */ 306 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 307 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 308 309 hci_connection_t * conn = btstack_memory_hci_connection_get(); 310 if (!conn) return NULL; 311 hci_connection_init(conn); 312 313 bd_addr_copy(conn->address, addr); 314 conn->address_type = addr_type; 315 conn->con_handle = HCI_CON_HANDLE_INVALID; 316 conn->role = HCI_ROLE_INVALID; 317 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 318 conn->le_past_sync_handle = HCI_CON_HANDLE_INVALID; 319 #endif 320 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 321 322 return conn; 323 } 324 325 326 /** 327 * get le connection parameter range 328 * 329 * @return le connection parameter range struct 330 */ 331 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 332 *range = hci_stack->le_connection_parameter_range; 333 } 334 335 /** 336 * set le connection parameter range 337 * 338 */ 339 340 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 341 hci_stack->le_connection_parameter_range = *range; 342 } 343 344 /** 345 * @brief Test if connection parameters are inside in existing rage 346 * @param conn_interval_min (unit: 1.25ms) 347 * @param conn_interval_max (unit: 1.25ms) 348 * @param conn_latency 349 * @param supervision_timeout (unit: 10ms) 350 * @return 1 if included 351 */ 352 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){ 353 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 354 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 355 356 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 357 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 358 359 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 360 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 361 362 return 1; 363 } 364 365 /** 366 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 367 * @note: default: 1 368 * @param max_peripheral_connections 369 */ 370 #ifdef ENABLE_LE_PERIPHERAL 371 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 372 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 373 } 374 #endif 375 376 /** 377 * get hci connections iterator 378 * 379 * @return hci connections iterator 380 */ 381 382 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 383 btstack_linked_list_iterator_init(it, &hci_stack->connections); 384 } 385 386 /** 387 * get connection for a given handle 388 * 389 * @return connection OR NULL, if not found 390 */ 391 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 392 btstack_linked_list_iterator_t it; 393 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 394 while (btstack_linked_list_iterator_has_next(&it)){ 395 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 396 if ( item->con_handle == con_handle ) { 397 return item; 398 } 399 } 400 return NULL; 401 } 402 403 /** 404 * get connection for given address 405 * 406 * @return connection OR NULL, if not found 407 */ 408 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 409 btstack_linked_list_iterator_t it; 410 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 411 while (btstack_linked_list_iterator_has_next(&it)){ 412 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 413 if (connection->address_type != addr_type) continue; 414 if (memcmp(addr, connection->address, 6) != 0) continue; 415 return connection; 416 } 417 return NULL; 418 } 419 420 #ifdef ENABLE_CLASSIC 421 422 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 423 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 424 } 425 426 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 427 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 428 } 429 430 #ifdef ENABLE_SCO_OVER_HCI 431 static int hci_number_sco_connections(void){ 432 int connections = 0; 433 btstack_linked_list_iterator_t it; 434 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 435 while (btstack_linked_list_iterator_has_next(&it)){ 436 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 437 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 438 connections++; 439 } 440 return connections; 441 } 442 #endif 443 444 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 445 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 446 #ifdef HAVE_EMBEDDED_TICK 447 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 448 // connections might be timed out 449 hci_emit_l2cap_check_timeout(connection); 450 } 451 #else 452 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 453 // connections might be timed out 454 hci_emit_l2cap_check_timeout(connection); 455 } 456 #endif 457 } 458 459 static void hci_connection_timestamp(hci_connection_t *connection){ 460 #ifdef HAVE_EMBEDDED_TICK 461 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 462 #else 463 connection->timestamp = btstack_run_loop_get_time_ms(); 464 #endif 465 } 466 467 /** 468 * add authentication flags and reset timer 469 * @note: assumes classic connection 470 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 471 */ 472 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 473 bd_addr_t addr; 474 reverse_bd_addr(bd_addr, addr); 475 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 476 if (conn) { 477 connectionSetAuthenticationFlags(conn, flags); 478 hci_connection_timestamp(conn); 479 } 480 } 481 482 static bool hci_pairing_active(hci_connection_t * hci_connection){ 483 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 484 } 485 486 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 487 if (hci_pairing_active(hci_connection)) return; 488 if (ssp){ 489 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 490 } else { 491 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 492 } 493 // if we are initiator, we have sent an HCI Authenticate Request 494 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 495 496 // if we are responder, use minimal service security level as required level 497 if (!initiator){ 498 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); 499 } 500 501 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 502 503 uint8_t event[12]; 504 event[0] = GAP_EVENT_PAIRING_STARTED; 505 event[1] = 10; 506 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 507 reverse_bd_addr(hci_connection->address, &event[4]); 508 event[10] = (uint8_t) ssp; 509 event[11] = (uint8_t) initiator; 510 hci_emit_event(event, sizeof(event), 1); 511 } 512 513 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 514 hci_connection->requested_security_level = LEVEL_0; 515 if (!hci_pairing_active(hci_connection)) return; 516 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 517 #ifdef ENABLE_CLASSIC_PAIRING_OOB 518 hci_connection->classic_oob_c_192 = NULL; 519 hci_connection->classic_oob_r_192 = NULL; 520 hci_connection->classic_oob_c_256 = NULL; 521 hci_connection->classic_oob_r_256 = NULL; 522 #endif 523 log_info("pairing complete, status %02x", status); 524 525 uint8_t event[11]; 526 event[0] = GAP_EVENT_PAIRING_COMPLETE; 527 event[1] = 9; 528 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 529 reverse_bd_addr(hci_connection->address, &event[4]); 530 event[10] = status; 531 hci_emit_event(event, sizeof(event), 1); 532 533 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 534 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 535 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 536 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 537 hci_connection->bonding_status = status; 538 } 539 } 540 541 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 542 hci_connection_t * conn = hci_connection_for_handle(handle); 543 if (!conn) return false; 544 return hci_pairing_active(conn); 545 } 546 547 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 548 if (!hci_stack->link_key_db) return; 549 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 550 hci_stack->link_key_db->delete_link_key(addr); 551 } 552 553 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 554 if (!hci_stack->link_key_db) return; 555 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 556 hci_stack->link_key_db->put_link_key(addr, link_key, type); 557 } 558 559 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 560 if (!hci_stack->link_key_db) return false; 561 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 562 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 563 return result; 564 } 565 566 void gap_delete_all_link_keys(void){ 567 bd_addr_t addr; 568 link_key_t link_key; 569 link_key_type_t type; 570 btstack_link_key_iterator_t it; 571 int ok = gap_link_key_iterator_init(&it); 572 if (!ok) { 573 log_error("could not initialize iterator"); 574 return; 575 } 576 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 577 gap_drop_link_key_for_bd_addr(addr); 578 } 579 gap_link_key_iterator_done(&it); 580 } 581 582 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 583 if (!hci_stack->link_key_db) return 0; 584 if (!hci_stack->link_key_db->iterator_init) return 0; 585 return hci_stack->link_key_db->iterator_init(it); 586 } 587 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){ 588 if (!hci_stack->link_key_db) return 0; 589 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 590 } 591 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 592 if (!hci_stack->link_key_db) return; 593 hci_stack->link_key_db->iterator_done(it); 594 } 595 #endif 596 597 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 598 switch (address_type){ 599 case BD_ADDR_TYPE_LE_PUBLIC: 600 case BD_ADDR_TYPE_LE_RANDOM: 601 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 602 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 603 return true; 604 default: 605 return false; 606 } 607 } 608 609 static int hci_is_le_connection(hci_connection_t * connection){ 610 return hci_is_le_connection_type(connection->address_type); 611 } 612 613 /** 614 * count connections 615 */ 616 static int nr_hci_connections(void){ 617 int count = 0; 618 btstack_linked_item_t *it; 619 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 620 count++; 621 } 622 return count; 623 } 624 625 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 626 627 unsigned int num_packets_sent_classic = 0; 628 unsigned int num_packets_sent_le = 0; 629 630 btstack_linked_item_t *it; 631 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 632 hci_connection_t * connection = (hci_connection_t *) it; 633 if (hci_is_le_connection(connection)){ 634 num_packets_sent_le += connection->num_packets_sent; 635 } 636 if (connection->address_type == BD_ADDR_TYPE_ACL){ 637 num_packets_sent_classic += connection->num_packets_sent; 638 } 639 } 640 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 641 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 642 int free_slots_le = 0; 643 644 if (free_slots_classic < 0){ 645 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); 646 return 0; 647 } 648 649 if (hci_stack->le_acl_packets_total_num){ 650 // if we have LE slots, they are used 651 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 652 if (free_slots_le < 0){ 653 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); 654 return 0; 655 } 656 } else { 657 // otherwise, classic slots are used for LE, too 658 free_slots_classic -= num_packets_sent_le; 659 if (free_slots_classic < 0){ 660 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); 661 return 0; 662 } 663 } 664 665 switch (address_type){ 666 case BD_ADDR_TYPE_UNKNOWN: 667 log_error("hci_number_free_acl_slots: unknown address type"); 668 return 0; 669 670 case BD_ADDR_TYPE_ACL: 671 return (uint16_t) free_slots_classic; 672 673 default: 674 if (hci_stack->le_acl_packets_total_num > 0){ 675 return (uint16_t) free_slots_le; 676 } 677 return (uint16_t) free_slots_classic; 678 } 679 } 680 681 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 682 // get connection type 683 hci_connection_t * connection = hci_connection_for_handle(con_handle); 684 if (!connection){ 685 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 686 return 0; 687 } 688 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 689 } 690 691 #ifdef ENABLE_CLASSIC 692 static int hci_number_free_sco_slots(void){ 693 unsigned int num_sco_packets_sent = 0; 694 btstack_linked_item_t *it; 695 if (hci_stack->synchronous_flow_control_enabled){ 696 // explicit flow control 697 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 698 hci_connection_t * connection = (hci_connection_t *) it; 699 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 700 num_sco_packets_sent += connection->num_packets_sent; 701 } 702 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 703 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 704 return 0; 705 } 706 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 707 } else { 708 // implicit flow control -- TODO 709 int num_ready = 0; 710 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 711 hci_connection_t * connection = (hci_connection_t *) it; 712 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 713 if (connection->sco_tx_ready == 0) continue; 714 num_ready++; 715 } 716 return num_ready; 717 } 718 } 719 #endif 720 721 // only used to send HCI Host Number Completed Packets 722 static int hci_can_send_comand_packet_transport(void){ 723 if (hci_stack->hci_packet_buffer_reserved) return 0; 724 725 // check for async hci transport implementations 726 if (hci_stack->hci_transport->can_send_packet_now){ 727 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 728 return 0; 729 } 730 } 731 return 1; 732 } 733 734 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 735 bool hci_can_send_command_packet_now(void){ 736 if (hci_can_send_comand_packet_transport() == 0) return false; 737 return hci_stack->num_cmd_packets > 0u; 738 } 739 740 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 741 // check for async hci transport implementations 742 if (!hci_stack->hci_transport->can_send_packet_now) return true; 743 return hci_stack->hci_transport->can_send_packet_now(packet_type); 744 } 745 746 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 747 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 748 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 749 } 750 751 bool hci_can_send_acl_le_packet_now(void){ 752 if (hci_stack->hci_packet_buffer_reserved) return false; 753 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 754 } 755 756 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 757 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 758 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 759 } 760 761 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 762 if (hci_stack->hci_packet_buffer_reserved) return false; 763 return hci_can_send_prepared_acl_packet_now(con_handle); 764 } 765 766 #ifdef ENABLE_CLASSIC 767 bool hci_can_send_acl_classic_packet_now(void){ 768 if (hci_stack->hci_packet_buffer_reserved) return false; 769 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 770 } 771 772 bool hci_can_send_prepared_sco_packet_now(void){ 773 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 774 if (hci_have_usb_transport()){ 775 return hci_stack->sco_can_send_now; 776 } else { 777 return hci_number_free_sco_slots() > 0; 778 } 779 } 780 781 bool hci_can_send_sco_packet_now(void){ 782 if (hci_stack->hci_packet_buffer_reserved) return false; 783 return hci_can_send_prepared_sco_packet_now(); 784 } 785 786 void hci_request_sco_can_send_now_event(void){ 787 hci_stack->sco_waiting_for_can_send_now = 1; 788 hci_notify_if_sco_can_send_now(); 789 } 790 #endif 791 792 // used for internal checks in l2cap.c 793 bool hci_is_packet_buffer_reserved(void){ 794 return hci_stack->hci_packet_buffer_reserved; 795 } 796 797 // reserves outgoing packet buffer. 798 // @return 1 if successful 799 bool hci_reserve_packet_buffer(void){ 800 if (hci_stack->hci_packet_buffer_reserved) { 801 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 802 return false; 803 } 804 hci_stack->hci_packet_buffer_reserved = true; 805 return true; 806 } 807 808 void hci_release_packet_buffer(void){ 809 hci_stack->hci_packet_buffer_reserved = false; 810 } 811 812 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 813 static int hci_transport_synchronous(void){ 814 return hci_stack->hci_transport->can_send_packet_now == NULL; 815 } 816 817 // used for debugging 818 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 819 static void hci_controller_dump_packets(void){ 820 // format: "{handle:04x}:{count:02d} " 821 char summaries[3][7 * 8 + 1]; 822 uint16_t totals[3]; 823 uint8_t index; 824 for (index = 0 ; index < 3 ; index++){ 825 summaries[index][0] = 0; 826 totals[index] = 0; 827 } 828 btstack_linked_item_t *it; 829 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 830 hci_connection_t * connection = (hci_connection_t *) it; 831 switch (connection->address_type){ 832 case BD_ADDR_TYPE_ACL: 833 index = 0; 834 break; 835 case BD_ADDR_TYPE_SCO: 836 index = 2; 837 break; 838 default: 839 index = 1; 840 break; 841 } 842 totals[index] += connection->num_packets_sent; 843 char item_text[10]; 844 sprintf(item_text, "%04x:%02d ", connection->con_handle,connection->num_packets_sent); 845 btstack_strcat(summaries[index], sizeof(summaries[0]), item_text); 846 } 847 for (index = 0 ; index < 3 ; index++){ 848 if (summaries[index][0] == 0){ 849 summaries[index][0] = '-'; 850 summaries[index][1] = 0; 851 } 852 } 853 log_info("Controller ACL BR/EDR: %s total %u / LE: %s total %u / SCO: %s total %u", summaries[0], totals[0], summaries[1], totals[1], summaries[2], totals[2]); 854 } 855 #endif 856 857 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 858 859 // 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); 860 861 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 862 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 863 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 864 max_acl_data_packet_length = hci_stack->le_data_packets_length; 865 } 866 867 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 868 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 869 max_acl_data_packet_length = connection->le_max_tx_octets; 870 } 871 #endif 872 873 log_debug("hci_send_acl_packet_fragments entered"); 874 875 uint8_t status = ERROR_CODE_SUCCESS; 876 // multiple packets could be send on a synchronous HCI transport 877 while (true){ 878 879 log_debug("hci_send_acl_packet_fragments loop entered"); 880 881 // get current data 882 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 883 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 884 bool more_fragments = false; 885 886 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 887 if (current_acl_data_packet_length > max_acl_data_packet_length){ 888 more_fragments = true; 889 current_acl_data_packet_length = max_acl_data_packet_length; 890 } 891 892 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 893 if (acl_header_pos > 0u){ 894 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 895 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 896 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 897 } 898 899 // update header len 900 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 901 902 // count packet 903 connection->num_packets_sent++; 904 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 905 906 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 907 if (more_fragments){ 908 // update start of next fragment to send 909 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 910 } else { 911 // done 912 hci_stack->acl_fragmentation_pos = 0; 913 hci_stack->acl_fragmentation_total_size = 0; 914 } 915 916 // send packet 917 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 918 const int size = current_acl_data_packet_length + 4; 919 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 920 hci_stack->acl_fragmentation_tx_active = 1; 921 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 922 if (err != 0){ 923 // no error from HCI Transport expected 924 status = ERROR_CODE_HARDWARE_FAILURE; 925 } 926 927 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 928 hci_controller_dump_packets(); 929 #endif 930 931 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 932 933 // done yet? 934 if (!more_fragments) break; 935 936 // can send more? 937 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 938 } 939 940 log_debug("hci_send_acl_packet_fragments loop over"); 941 942 // release buffer now for synchronous transport 943 if (hci_transport_synchronous()){ 944 hci_stack->acl_fragmentation_tx_active = 0; 945 hci_release_packet_buffer(); 946 hci_emit_transport_packet_sent(); 947 } 948 949 return status; 950 } 951 952 // pre: caller has reserved the packet buffer 953 uint8_t hci_send_acl_packet_buffer(int size){ 954 btstack_assert(hci_stack->hci_packet_buffer_reserved); 955 956 uint8_t * packet = hci_stack->hci_packet_buffer; 957 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 958 959 // check for free places on Bluetooth module 960 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 961 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 962 hci_release_packet_buffer(); 963 hci_emit_transport_packet_sent(); 964 return BTSTACK_ACL_BUFFERS_FULL; 965 } 966 967 hci_connection_t *connection = hci_connection_for_handle( con_handle); 968 if (!connection) { 969 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 970 hci_release_packet_buffer(); 971 hci_emit_transport_packet_sent(); 972 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 973 } 974 975 #ifdef ENABLE_CLASSIC 976 hci_connection_timestamp(connection); 977 #endif 978 979 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 980 981 // setup data 982 hci_stack->acl_fragmentation_total_size = size; 983 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 984 985 return hci_send_acl_packet_fragments(connection); 986 } 987 988 #ifdef ENABLE_CLASSIC 989 // pre: caller has reserved the packet buffer 990 uint8_t hci_send_sco_packet_buffer(int size){ 991 btstack_assert(hci_stack->hci_packet_buffer_reserved); 992 993 uint8_t * packet = hci_stack->hci_packet_buffer; 994 995 // skip checks in loopback mode 996 if (!hci_stack->loopback_mode){ 997 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 998 999 // check for free places on Bluetooth module 1000 if (!hci_can_send_prepared_sco_packet_now()) { 1001 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 1002 hci_release_packet_buffer(); 1003 hci_emit_transport_packet_sent(); 1004 return BTSTACK_ACL_BUFFERS_FULL; 1005 } 1006 1007 // track send packet in connection struct 1008 hci_connection_t *connection = hci_connection_for_handle( con_handle); 1009 if (!connection) { 1010 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 1011 hci_release_packet_buffer(); 1012 hci_emit_transport_packet_sent(); 1013 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1014 } 1015 1016 if (hci_have_usb_transport()){ 1017 // token used 1018 hci_stack->sco_can_send_now = false; 1019 } else { 1020 if (hci_stack->synchronous_flow_control_enabled){ 1021 connection->num_packets_sent++; 1022 } else { 1023 connection->sco_tx_ready--; 1024 } 1025 } 1026 } 1027 1028 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 1029 1030 #ifdef HAVE_SCO_TRANSPORT 1031 hci_stack->sco_transport->send_packet(packet, size); 1032 hci_release_packet_buffer(); 1033 hci_emit_transport_packet_sent(); 1034 1035 return 0; 1036 #else 1037 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 1038 if (hci_transport_synchronous()){ 1039 hci_release_packet_buffer(); 1040 hci_emit_transport_packet_sent(); 1041 } 1042 1043 if (err != 0){ 1044 return ERROR_CODE_HARDWARE_FAILURE; 1045 } 1046 return ERROR_CODE_SUCCESS; 1047 #endif 1048 } 1049 #endif 1050 1051 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 1052 static uint8_t hci_send_iso_packet_fragments(void){ 1053 1054 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 1055 uint8_t status = ERROR_CODE_SUCCESS; 1056 // multiple packets could be send on a synchronous HCI transport 1057 while (true){ 1058 1059 // get current data 1060 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 1061 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 1062 bool more_fragments = false; 1063 1064 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 1065 if (current_iso_data_packet_length > max_iso_data_packet_length){ 1066 more_fragments = true; 1067 current_iso_data_packet_length = max_iso_data_packet_length; 1068 } 1069 1070 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1071 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1072 uint8_t pb_flags; 1073 if (iso_header_pos == 0u){ 1074 // first fragment, keep TS field 1075 pb_flags = more_fragments ? 0x00 : 0x02; 1076 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1077 } else { 1078 // later fragment, drop TS field 1079 pb_flags = more_fragments ? 0x01 : 0x03; 1080 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1081 } 1082 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1083 1084 // update header len 1085 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1086 1087 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1088 if (more_fragments){ 1089 // update start of next fragment to send 1090 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1091 } else { 1092 // done 1093 hci_stack->iso_fragmentation_pos = 0; 1094 hci_stack->iso_fragmentation_total_size = 0; 1095 } 1096 1097 // send packet 1098 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1099 const int size = current_iso_data_packet_length + 4; 1100 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1101 hci_stack->iso_fragmentation_tx_active = true; 1102 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1103 if (err != 0){ 1104 // no error from HCI Transport expected 1105 status = ERROR_CODE_HARDWARE_FAILURE; 1106 } 1107 1108 // done yet? 1109 if (!more_fragments) break; 1110 1111 // can send more? 1112 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1113 } 1114 1115 // release buffer now for synchronous transport 1116 if (hci_transport_synchronous()){ 1117 hci_stack->iso_fragmentation_tx_active = false; 1118 hci_release_packet_buffer(); 1119 hci_emit_transport_packet_sent(); 1120 } 1121 1122 return status; 1123 } 1124 1125 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1126 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1127 1128 hci_con_handle_t con_handle = (hci_con_handle_t) little_endian_read_16(hci_stack->hci_packet_buffer, 0) & 0xfff; 1129 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(con_handle); 1130 if (iso_stream == NULL){ 1131 hci_release_packet_buffer(); 1132 hci_iso_notify_can_send_now(); 1133 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1134 } 1135 1136 // TODO: check for space on controller 1137 1138 // skip iso packets if needed 1139 if (iso_stream->num_packets_to_skip > 0){ 1140 iso_stream->num_packets_to_skip--; 1141 // pretend it was processed and trigger next one 1142 hci_release_packet_buffer(); 1143 hci_iso_notify_can_send_now(); 1144 return ERROR_CODE_SUCCESS; 1145 } 1146 1147 // track outgoing packet sent 1148 log_info("Outgoing ISO packet for con handle 0x%04x", con_handle); 1149 iso_stream->num_packets_sent++; 1150 1151 // setup data 1152 hci_stack->iso_fragmentation_total_size = size; 1153 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1154 1155 return hci_send_iso_packet_fragments(); 1156 } 1157 #endif 1158 1159 static void acl_handler(uint8_t *packet, uint16_t size){ 1160 1161 // get info 1162 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1163 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1164 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1165 uint16_t acl_length = READ_ACL_LENGTH(packet); 1166 1167 // ignore non-registered handle 1168 if (!conn){ 1169 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1170 return; 1171 } 1172 1173 // assert packet is complete 1174 if ((acl_length + 4u) != size){ 1175 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1176 return; 1177 } 1178 1179 #ifdef ENABLE_CLASSIC 1180 // update idle timestamp 1181 hci_connection_timestamp(conn); 1182 #endif 1183 1184 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1185 hci_stack->host_completed_packets = 1; 1186 conn->num_packets_completed++; 1187 #endif 1188 1189 // handle different packet types 1190 switch (acl_flags & 0x03u) { 1191 1192 case 0x01: // continuation fragment 1193 1194 // sanity checks 1195 if (conn->acl_recombination_pos == 0u) { 1196 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1197 return; 1198 } 1199 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1200 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1201 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1202 conn->acl_recombination_pos = 0; 1203 return; 1204 } 1205 1206 // append fragment payload (header already stored) 1207 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1208 &packet[4], acl_length); 1209 conn->acl_recombination_pos += acl_length; 1210 1211 // forward complete L2CAP packet if complete. 1212 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1213 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1214 // reset recombination buffer 1215 conn->acl_recombination_length = 0; 1216 conn->acl_recombination_pos = 0; 1217 } 1218 break; 1219 1220 case 0x02: { // first fragment 1221 1222 // sanity check 1223 if (conn->acl_recombination_pos) { 1224 // we just received the first fragment, but still have data. Only warn if the packet wasn't a flushable packet 1225 if ((conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE+1] >> 4) != 0x02){ 1226 log_error( "ACL First Fragment but %u bytes in buffer for handle 0x%02x, dropping stale fragments", conn->acl_recombination_pos, con_handle); 1227 } 1228 conn->acl_recombination_pos = 0; 1229 } 1230 1231 // peek into L2CAP packet! 1232 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1233 1234 // compare fragment size to L2CAP packet size 1235 if (acl_length >= (l2cap_length + 4u)){ 1236 // forward fragment as L2CAP packet 1237 hci_emit_acl_packet(packet, acl_length + 4u); 1238 } else { 1239 1240 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1241 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1242 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1243 return; 1244 } 1245 1246 // store first fragment and tweak acl length for complete package 1247 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1248 packet, acl_length + 4u); 1249 conn->acl_recombination_pos = acl_length + 4u; 1250 conn->acl_recombination_length = l2cap_length; 1251 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1252 } 1253 break; 1254 1255 } 1256 default: 1257 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1258 return; 1259 } 1260 1261 // execute main loop 1262 hci_run(); 1263 } 1264 1265 static void hci_connection_stop_timer(hci_connection_t * conn){ 1266 btstack_run_loop_remove_timer(&conn->timeout); 1267 #ifdef ENABLE_CLASSIC 1268 btstack_run_loop_remove_timer(&conn->timeout_sco); 1269 #endif 1270 } 1271 1272 static void hci_shutdown_connection(hci_connection_t *conn){ 1273 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1274 1275 #ifdef ENABLE_CLASSIC 1276 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1277 bd_addr_type_t addr_type = conn->address_type; 1278 #endif 1279 #ifdef HAVE_SCO_TRANSPORT 1280 hci_con_handle_t con_handle = conn->con_handle; 1281 #endif 1282 #endif 1283 1284 hci_connection_stop_timer(conn); 1285 1286 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1287 btstack_memory_hci_connection_free( conn ); 1288 1289 // now it's gone 1290 hci_emit_nr_connections_changed(); 1291 1292 #ifdef ENABLE_CLASSIC 1293 #ifdef ENABLE_SCO_OVER_HCI 1294 // update SCO 1295 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1296 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1297 } 1298 #endif 1299 #ifdef HAVE_SCO_TRANSPORT 1300 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1301 hci_stack->sco_transport->close(con_handle); 1302 } 1303 #endif 1304 #endif 1305 } 1306 1307 #ifdef ENABLE_CLASSIC 1308 1309 static const uint16_t packet_type_sizes[] = { 1310 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1311 HCI_ACL_DH1_SIZE, 0, 0, 0, 1312 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1313 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1314 }; 1315 static const uint8_t packet_type_feature_requirement_bit[] = { 1316 0, // 3 slot packets 1317 1, // 5 slot packets 1318 25, // EDR 2 mpbs 1319 26, // EDR 3 mbps 1320 39, // 3 slot EDR packts 1321 40, // 5 slot EDR packet 1322 }; 1323 static const uint16_t packet_type_feature_packet_mask[] = { 1324 0x0f00, // 3 slot packets 1325 0xf000, // 5 slot packets 1326 0x1102, // EDR 2 mpbs 1327 0x2204, // EDR 3 mbps 1328 0x0300, // 3 slot EDR packts 1329 0x3000, // 5 slot EDR packet 1330 }; 1331 1332 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1333 // enable packet types based on size 1334 uint16_t packet_types = 0; 1335 unsigned int i; 1336 for (i=0;i<16;i++){ 1337 if (packet_type_sizes[i] == 0) continue; 1338 if (packet_type_sizes[i] <= buffer_size){ 1339 packet_types |= 1 << i; 1340 } 1341 } 1342 // disable packet types due to missing local supported features 1343 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1344 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1345 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1346 if (feature_set) continue; 1347 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1348 packet_types &= ~packet_type_feature_packet_mask[i]; 1349 } 1350 // flip bits for "may not be used" 1351 packet_types ^= 0x3306; 1352 return packet_types; 1353 } 1354 1355 uint16_t hci_usable_acl_packet_types(void){ 1356 return hci_stack->packet_types; 1357 } 1358 #endif 1359 1360 uint8_t* hci_get_outgoing_packet_buffer(void){ 1361 // hci packet buffer is >= acl data packet length 1362 return hci_stack->hci_packet_buffer; 1363 } 1364 1365 uint16_t hci_max_acl_data_packet_length(void){ 1366 return hci_stack->acl_data_packet_length; 1367 } 1368 1369 #ifdef ENABLE_CLASSIC 1370 bool hci_extended_sco_link_supported(void){ 1371 // No. 31, byte 3, bit 7 1372 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1373 } 1374 #endif 1375 1376 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1377 // No. 54, byte 6, bit 6 1378 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1379 } 1380 1381 #ifdef ENABLE_CLASSIC 1382 static int gap_ssp_supported(void){ 1383 // No. 51, byte 6, bit 3 1384 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1385 } 1386 #endif 1387 1388 static int hci_classic_supported(void){ 1389 #ifdef ENABLE_CLASSIC 1390 // No. 37, byte 4, bit 5, = No BR/EDR Support 1391 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1392 #else 1393 return 0; 1394 #endif 1395 } 1396 1397 static int hci_le_supported(void){ 1398 #ifdef ENABLE_BLE 1399 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1400 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1401 #else 1402 return 0; 1403 #endif 1404 } 1405 1406 static bool hci_command_supported(uint8_t command_index){ 1407 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1408 } 1409 1410 #ifdef ENABLE_BLE 1411 1412 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1413 static bool hci_extended_advertising_supported(void){ 1414 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1415 } 1416 #endif 1417 1418 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1419 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1420 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1421 } else { 1422 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1423 } 1424 } 1425 1426 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1427 *addr_type = hci_stack->le_own_addr_type; 1428 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1429 } 1430 1431 #ifdef ENABLE_LE_PERIPHERAL 1432 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1433 *addr_type = hci_stack->le_advertisements_own_addr_type; 1434 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1435 }; 1436 #endif 1437 1438 #ifdef ENABLE_LE_CENTRAL 1439 1440 /** 1441 * @brief Get own addr type and address used for LE connections (Central) 1442 */ 1443 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1444 *addr_type = hci_stack->le_connection_own_addr_type; 1445 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1446 } 1447 1448 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1449 1450 uint16_t offset = 3; 1451 uint8_t num_reports = packet[offset]; 1452 offset += 1; 1453 1454 uint16_t i; 1455 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1456 for (i=0; (i<num_reports) && (offset < size);i++){ 1457 // sanity checks on data_length: 1458 uint8_t data_length = packet[offset + 8]; 1459 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1460 if ((offset + 9u + data_length + 1u) > size) return; 1461 // setup event 1462 uint8_t event_size = 10u + data_length; 1463 uint16_t pos = 0; 1464 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1465 event[pos++] = event_size; 1466 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1467 offset += 8; 1468 pos += 8; 1469 event[pos++] = packet[offset + 1 + data_length]; // rssi 1470 event[pos++] = data_length; 1471 offset++; 1472 (void)memcpy(&event[pos], &packet[offset], data_length); 1473 pos += data_length; 1474 offset += data_length + 1u; // rssi 1475 hci_emit_event(event, pos, 1); 1476 } 1477 } 1478 1479 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1480 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1481 uint16_t offset = 3; 1482 uint8_t num_reports = packet[offset++]; 1483 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1484 uint8_t i; 1485 for (i=0; (i<num_reports) && (offset < size);i++){ 1486 // sanity checks on data_length: 1487 uint16_t data_length = packet[offset + 23]; 1488 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1489 if ((offset + 24u + data_length) > size) return; 1490 uint16_t event_type = little_endian_read_16(packet, offset); 1491 offset += 2; 1492 if ((event_type & 0x10) != 0) { 1493 // setup legacy event 1494 uint8_t legacy_event_type; 1495 switch (event_type){ 1496 case 0b0010011: 1497 // ADV_IND 1498 legacy_event_type = 0; 1499 break; 1500 case 0b0010101: 1501 // ADV_DIRECT_IND 1502 legacy_event_type = 1; 1503 break; 1504 case 0b0010010: 1505 // ADV_SCAN_IND 1506 legacy_event_type = 2; 1507 break; 1508 case 0b0010000: 1509 // ADV_NONCONN_IND 1510 legacy_event_type = 3; 1511 break; 1512 case 0b0011011: 1513 case 0b0011010: 1514 // SCAN_RSP 1515 legacy_event_type = 4; 1516 break; 1517 default: 1518 legacy_event_type = 0; 1519 break; 1520 } 1521 uint16_t pos = 0; 1522 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1523 event[pos++] = 10u + data_length; 1524 event[pos++] = legacy_event_type; 1525 // copy address type + address 1526 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1527 offset += 7; 1528 pos += 7; 1529 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1530 offset += 4; 1531 // copy rssi 1532 event[pos++] = packet[offset++]; 1533 // skip periodic advertising interval and direct address 1534 offset += 9; 1535 // copy data len + data; 1536 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1537 pos += 1 +data_length; 1538 offset += 1+ data_length; 1539 hci_emit_event(event, pos, 1); 1540 } else { 1541 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1542 uint8_t report_len = 24 + data_length; 1543 event[1] = report_len; 1544 little_endian_store_16(event, 2, event_type); 1545 memcpy(&event[4], &packet[offset], report_len); 1546 offset += report_len; 1547 hci_emit_event(event, 2 + report_len, 1); 1548 } 1549 } 1550 } 1551 #endif 1552 1553 #endif 1554 #endif 1555 1556 #ifdef ENABLE_BLE 1557 #ifdef ENABLE_LE_PERIPHERAL 1558 static void hci_update_advertisements_enabled_for_current_roles(void){ 1559 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1560 // get number of active le slave connections 1561 int num_slave_connections = 0; 1562 btstack_linked_list_iterator_t it; 1563 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1564 while (btstack_linked_list_iterator_has_next(&it)){ 1565 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1566 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1567 if (con->state != OPEN) continue; 1568 if (con->role != HCI_ROLE_SLAVE) continue; 1569 if (!hci_is_le_connection(con)) continue; 1570 num_slave_connections++; 1571 } 1572 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1573 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1574 } else { 1575 hci_stack->le_advertisements_enabled_for_current_roles = false; 1576 } 1577 } 1578 #endif 1579 #endif 1580 1581 #ifdef ENABLE_CLASSIC 1582 static void gap_run_set_local_name(void){ 1583 hci_reserve_packet_buffer(); 1584 uint8_t * packet = hci_stack->hci_packet_buffer; 1585 // construct HCI Command and send 1586 uint16_t opcode = hci_write_local_name.opcode; 1587 hci_stack->last_cmd_opcode = opcode; 1588 packet[0] = opcode & 0xff; 1589 packet[1] = opcode >> 8; 1590 packet[2] = DEVICE_NAME_LEN; 1591 memset(&packet[3], 0, DEVICE_NAME_LEN); 1592 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1593 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1594 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1595 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1596 // expand '00:00:00:00:00:00' in name with bd_addr 1597 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1598 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1599 } 1600 1601 static void gap_run_set_eir_data(void){ 1602 hci_reserve_packet_buffer(); 1603 uint8_t * packet = hci_stack->hci_packet_buffer; 1604 // construct HCI Command in-place and send 1605 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1606 hci_stack->last_cmd_opcode = opcode; 1607 uint16_t offset = 0; 1608 packet[offset++] = opcode & 0xff; 1609 packet[offset++] = opcode >> 8; 1610 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1611 packet[offset++] = 0; // FEC not required 1612 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1613 if (hci_stack->eir_data){ 1614 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1615 ad_context_t context; 1616 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1617 uint8_t data_type = ad_iterator_get_data_type(&context); 1618 uint8_t size = ad_iterator_get_data_len(&context); 1619 const uint8_t *data = ad_iterator_get_data(&context); 1620 // copy item 1621 packet[offset++] = size + 1; 1622 packet[offset++] = data_type; 1623 memcpy(&packet[offset], data, size); 1624 // update name item 1625 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1626 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1627 } 1628 offset += size; 1629 } 1630 } else { 1631 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1632 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1633 packet[offset++] = bytes_to_copy + 1; 1634 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1635 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1636 // expand '00:00:00:00:00:00' in name with bd_addr 1637 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1638 } 1639 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1640 } 1641 1642 static void hci_run_gap_tasks_classic(void){ 1643 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1644 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1645 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1646 return; 1647 } 1648 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1649 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1650 gap_run_set_local_name(); 1651 return; 1652 } 1653 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1654 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1655 gap_run_set_eir_data(); 1656 return; 1657 } 1658 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1659 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1660 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1661 return; 1662 } 1663 // write page scan activity 1664 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1665 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1666 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1667 return; 1668 } 1669 // write page scan type 1670 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1671 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1672 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1673 return; 1674 } 1675 // write page timeout 1676 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1677 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1678 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1679 return; 1680 } 1681 // send scan enable 1682 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1683 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1684 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1685 return; 1686 } 1687 // send write scan activity 1688 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1689 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1690 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1691 return; 1692 } 1693 } 1694 #endif 1695 1696 #ifndef HAVE_HOST_CONTROLLER_API 1697 1698 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1699 if (!hci_stack->config) return 0; 1700 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1701 // Limit baud rate for Broadcom chipsets to 3 mbps 1702 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1703 baud_rate = 3000000; 1704 } 1705 return baud_rate; 1706 } 1707 1708 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1709 UNUSED(ds); 1710 1711 switch (hci_stack->substate){ 1712 case HCI_INIT_W4_SEND_RESET: 1713 log_info("Resend HCI Reset"); 1714 hci_stack->substate = HCI_INIT_SEND_RESET; 1715 hci_stack->num_cmd_packets = 1; 1716 hci_run(); 1717 break; 1718 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1719 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1720 if (hci_stack->hci_transport->reset_link){ 1721 hci_stack->hci_transport->reset_link(); 1722 } 1723 1724 /* fall through */ 1725 1726 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1727 log_info("Resend HCI Reset - CSR Warm Boot"); 1728 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1729 hci_stack->num_cmd_packets = 1; 1730 hci_run(); 1731 break; 1732 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1733 if (hci_stack->hci_transport->set_baudrate){ 1734 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1735 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1736 hci_stack->hci_transport->set_baudrate(baud_rate); 1737 } 1738 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1739 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1740 if (hci_stack->hci_transport->reset_link){ 1741 log_info("Link Reset"); 1742 hci_stack->hci_transport->reset_link(); 1743 } 1744 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1745 hci_run(); 1746 } 1747 break; 1748 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1749 // otherwise continue 1750 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1751 hci_send_cmd(&hci_read_local_supported_commands); 1752 break; 1753 default: 1754 break; 1755 } 1756 } 1757 #endif 1758 1759 static void hci_initializing_next_state(void){ 1760 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1761 } 1762 1763 static void hci_init_done(void){ 1764 // done. tell the app 1765 log_info("hci_init_done -> HCI_STATE_WORKING"); 1766 hci_stack->state = HCI_STATE_WORKING; 1767 hci_emit_state(); 1768 } 1769 1770 // assumption: hci_can_send_command_packet_now() == true 1771 static void hci_initializing_run(void){ 1772 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1773 1774 if (!hci_can_send_command_packet_now()) return; 1775 1776 #ifndef HAVE_HOST_CONTROLLER_API 1777 bool need_baud_change = hci_stack->config 1778 && hci_stack->chipset 1779 && hci_stack->chipset->set_baudrate_command 1780 && hci_stack->hci_transport->set_baudrate 1781 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1782 #endif 1783 1784 switch (hci_stack->substate){ 1785 case HCI_INIT_SEND_RESET: 1786 hci_state_reset(); 1787 1788 #ifndef HAVE_HOST_CONTROLLER_API 1789 // prepare reset if command complete not received in 100ms 1790 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1791 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1792 btstack_run_loop_add_timer(&hci_stack->timeout); 1793 #endif 1794 // send command 1795 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1796 hci_send_cmd(&hci_reset); 1797 break; 1798 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1799 hci_send_cmd(&hci_read_local_version_information); 1800 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1801 break; 1802 1803 #ifndef HAVE_HOST_CONTROLLER_API 1804 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1805 hci_state_reset(); 1806 // prepare reset if command complete not received in 100ms 1807 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1808 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1809 btstack_run_loop_add_timer(&hci_stack->timeout); 1810 // send command 1811 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1812 hci_send_cmd(&hci_reset); 1813 break; 1814 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1815 hci_state_reset(); 1816 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1817 hci_send_cmd(&hci_reset); 1818 break; 1819 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1820 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1821 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1822 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1823 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1824 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1825 break; 1826 } 1827 case HCI_INIT_SET_BD_ADDR: 1828 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1829 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1830 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1831 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1832 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1833 break; 1834 case HCI_INIT_SEND_READ_LOCAL_NAME: 1835 #ifdef ENABLE_CLASSIC 1836 hci_send_cmd(&hci_read_local_name); 1837 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1838 break; 1839 #endif 1840 /* fall through */ 1841 1842 case HCI_INIT_SEND_BAUD_CHANGE: 1843 if (need_baud_change) { 1844 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1845 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1846 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1847 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1848 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1849 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1850 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1851 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1852 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1853 btstack_run_loop_add_timer(&hci_stack->timeout); 1854 } 1855 break; 1856 } 1857 1858 /* fall through */ 1859 1860 case HCI_INIT_CUSTOM_INIT: 1861 // Custom initialization 1862 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1863 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1864 bool send_cmd = false; 1865 switch (hci_stack->chipset_result){ 1866 case BTSTACK_CHIPSET_VALID_COMMAND: 1867 send_cmd = true; 1868 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1869 break; 1870 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1871 send_cmd = true; 1872 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1873 log_info("CSR Warm Boot"); 1874 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1875 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1876 btstack_run_loop_add_timer(&hci_stack->timeout); 1877 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1878 && hci_stack->config 1879 && hci_stack->chipset 1880 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1881 && hci_stack->hci_transport->set_baudrate 1882 && hci_transport_uart_get_main_baud_rate()){ 1883 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1884 } else { 1885 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1886 } 1887 break; 1888 default: 1889 break; 1890 } 1891 1892 if (send_cmd){ 1893 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1894 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1895 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1896 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1897 break; 1898 } 1899 log_info("Init script done"); 1900 1901 // Init script download on Broadcom chipsets causes: 1902 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1903 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1904 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1905 1906 // - baud rate to reset, restore UART baud rate if needed 1907 if (need_baud_change) { 1908 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1909 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1910 hci_stack->hci_transport->set_baudrate(baud_rate); 1911 } 1912 1913 uint16_t bcm_delay_ms = 300; 1914 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1915 // -> Work around: wait here. 1916 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1917 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1918 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1919 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1920 btstack_run_loop_add_timer(&hci_stack->timeout); 1921 break; 1922 } 1923 } 1924 #endif 1925 /* fall through */ 1926 1927 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1928 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1929 hci_send_cmd(&hci_read_local_supported_commands); 1930 break; 1931 case HCI_INIT_READ_BD_ADDR: 1932 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1933 hci_send_cmd(&hci_read_bd_addr); 1934 break; 1935 case HCI_INIT_READ_BUFFER_SIZE: 1936 // only read buffer size if supported 1937 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1938 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1939 hci_send_cmd(&hci_read_buffer_size); 1940 break; 1941 } 1942 1943 /* fall through */ 1944 1945 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1946 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1947 hci_send_cmd(&hci_read_local_supported_features); 1948 break; 1949 1950 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1951 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1952 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1953 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1954 break; 1955 case HCI_INIT_HOST_BUFFER_SIZE: 1956 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1957 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1958 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1959 break; 1960 #endif 1961 1962 case HCI_INIT_SET_EVENT_MASK: 1963 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1964 if (hci_le_supported()){ 1965 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1966 } else { 1967 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1968 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1969 } 1970 break; 1971 1972 case HCI_INIT_SET_EVENT_MASK_2: 1973 // On Bluettooth PTS dongle (BL 654) with PacketCraft HCI Firmware (LMP subversion) 0x5244, 1974 // setting Event Mask 2 causes Controller to drop Encryption Change events. 1975 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2) 1976 && (hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_PACKETCRAFT_INC)){ 1977 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1978 // Encryption Change Event v2 - bit 25 1979 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1980 break; 1981 } 1982 1983 #ifdef ENABLE_CLASSIC 1984 /* fall through */ 1985 1986 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1987 if (hci_classic_supported() && gap_ssp_supported()){ 1988 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1989 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1990 break; 1991 } 1992 1993 /* fall through */ 1994 1995 case HCI_INIT_WRITE_INQUIRY_MODE: 1996 if (hci_classic_supported()){ 1997 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1998 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1999 break; 2000 } 2001 2002 /* fall through */ 2003 2004 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 2005 // skip write secure connections host support if not supported or disabled 2006 if (hci_classic_supported() && hci_stack->secure_connections_enable 2007 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 2008 hci_stack->secure_connections_active = true; 2009 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 2010 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 2011 break; 2012 } 2013 2014 /* fall through */ 2015 2016 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 2017 // skip set min encryption key size 2018 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 2019 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 2020 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 2021 break; 2022 } 2023 2024 #ifdef ENABLE_SCO_OVER_HCI 2025 /* fall through */ 2026 2027 // only sent if ENABLE_SCO_OVER_HCI is defined 2028 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2029 // skip write synchronous flow control if not supported 2030 if (hci_classic_supported() 2031 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 2032 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2033 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 2034 break; 2035 } 2036 /* fall through */ 2037 2038 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2039 // skip write default erroneous data reporting if not supported 2040 if (hci_classic_supported() 2041 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 2042 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2043 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 2044 break; 2045 } 2046 #endif 2047 2048 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 2049 /* fall through */ 2050 2051 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 2052 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 2053 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2054 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 2055 #ifdef ENABLE_SCO_OVER_HCI 2056 log_info("BCM: Route SCO data via HCI transport"); 2057 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 2058 #endif 2059 #ifdef ENABLE_SCO_OVER_PCM 2060 log_info("BCM: Route SCO data via PCM interface"); 2061 #ifdef ENABLE_BCM_PCM_WBS 2062 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 2063 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 2064 #else 2065 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2066 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 2067 #endif 2068 #endif 2069 break; 2070 } 2071 #endif 2072 2073 #ifdef ENABLE_SCO_OVER_PCM 2074 /* fall through */ 2075 2076 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2077 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2078 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2079 log_info("BCM: Config PCM interface for I2S"); 2080 #ifdef ENABLE_BCM_PCM_WBS 2081 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 2082 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 2083 #else 2084 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2085 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 2086 #endif 2087 break; 2088 } 2089 #endif 2090 #endif 2091 2092 #ifdef ENABLE_BLE 2093 /* fall through */ 2094 2095 // LE INIT 2096 case HCI_INIT_LE_READ_BUFFER_SIZE: 2097 if (hci_le_supported()){ 2098 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2099 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2100 hci_send_cmd(&hci_le_read_buffer_size_v2); 2101 } else { 2102 hci_send_cmd(&hci_le_read_buffer_size); 2103 } 2104 break; 2105 } 2106 2107 /* fall through */ 2108 2109 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2110 // skip write le host if not supported (e.g. on LE only EM9301) 2111 if (hci_le_supported() 2112 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2113 // LE Supported Host = 1, Simultaneous Host = 0 2114 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2115 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2116 break; 2117 } 2118 2119 /* fall through */ 2120 2121 case HCI_INIT_LE_SET_EVENT_MASK: 2122 if (hci_le_supported()){ 2123 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2124 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2125 break; 2126 } 2127 #endif 2128 2129 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2130 /* fall through */ 2131 2132 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2133 if (hci_le_supported() 2134 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2135 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2136 hci_send_cmd(&hci_le_read_maximum_data_length); 2137 break; 2138 } 2139 2140 /* fall through */ 2141 2142 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2143 if (hci_le_supported() 2144 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2145 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2146 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2147 break; 2148 } 2149 #endif 2150 2151 #ifdef ENABLE_LE_CENTRAL 2152 /* fall through */ 2153 2154 case HCI_INIT_READ_WHITE_LIST_SIZE: 2155 if (hci_le_supported()){ 2156 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2157 hci_send_cmd(&hci_le_read_white_list_size); 2158 break; 2159 } 2160 2161 #endif 2162 2163 #ifdef ENABLE_LE_PERIPHERAL 2164 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2165 /* fall through */ 2166 2167 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2168 if (hci_extended_advertising_supported()){ 2169 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2170 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2171 break; 2172 } 2173 #endif 2174 #endif 2175 /* fall through */ 2176 2177 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2178 case HCI_INIT_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS: 2179 if (hci_le_supported()) { 2180 hci_stack->substate = HCI_INIT_W4_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS; 2181 hci_send_cmd(&hci_le_set_host_feature, 32, 1); 2182 break; 2183 } 2184 #endif 2185 2186 /* fall through */ 2187 2188 case HCI_INIT_DONE: 2189 hci_stack->substate = HCI_INIT_DONE; 2190 // main init sequence complete 2191 #ifdef ENABLE_CLASSIC 2192 // check if initial Classic GAP Tasks are completed 2193 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2194 hci_run_gap_tasks_classic(); 2195 break; 2196 } 2197 #endif 2198 #ifdef ENABLE_BLE 2199 #ifdef ENABLE_LE_CENTRAL 2200 // check if initial LE GAP Tasks are completed 2201 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2202 hci_run_general_gap_le(); 2203 break; 2204 } 2205 #endif 2206 #endif 2207 hci_init_done(); 2208 break; 2209 2210 default: 2211 return; 2212 } 2213 } 2214 2215 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2216 bool command_completed = false; 2217 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2218 uint16_t opcode = little_endian_read_16(packet,3); 2219 if (opcode == hci_stack->last_cmd_opcode){ 2220 command_completed = true; 2221 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2222 } else { 2223 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2224 } 2225 } 2226 2227 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2228 uint8_t status = packet[2]; 2229 uint16_t opcode = little_endian_read_16(packet,4); 2230 if (opcode == hci_stack->last_cmd_opcode){ 2231 if (status){ 2232 command_completed = true; 2233 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2234 } else { 2235 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2236 } 2237 } else { 2238 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2239 } 2240 } 2241 #ifndef HAVE_HOST_CONTROLLER_API 2242 // Vendor == CSR 2243 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2244 // TODO: track actual command 2245 command_completed = true; 2246 } 2247 2248 // Vendor == Toshiba 2249 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2250 // TODO: track actual command 2251 command_completed = true; 2252 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2253 hci_stack->num_cmd_packets = 1; 2254 } 2255 #endif 2256 2257 return command_completed; 2258 } 2259 2260 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2261 2262 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2263 2264 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2265 2266 #ifndef HAVE_HOST_CONTROLLER_API 2267 2268 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2269 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2270 // 2271 // HCI Reset 2272 // Timeout 100 ms 2273 // HCI Reset 2274 // Command Complete Reset 2275 // HCI Read Local Version Information 2276 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2277 // hang... 2278 // 2279 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2280 if (!command_completed 2281 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2282 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2283 2284 uint16_t opcode = little_endian_read_16(packet,3); 2285 if (opcode == hci_reset.opcode){ 2286 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2287 return; 2288 } 2289 } 2290 2291 // CSR & H5 2292 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2293 if (!command_completed 2294 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2295 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2296 2297 uint16_t opcode = little_endian_read_16(packet,3); 2298 if (opcode == hci_reset.opcode){ 2299 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2300 return; 2301 } 2302 } 2303 2304 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2305 // fix: Correct substate and behave as command below 2306 if (command_completed){ 2307 switch (hci_stack->substate){ 2308 case HCI_INIT_SEND_RESET: 2309 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2310 break; 2311 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2312 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2313 break; 2314 default: 2315 break; 2316 } 2317 } 2318 2319 #endif 2320 2321 if (!command_completed) return; 2322 2323 bool need_baud_change = false; 2324 bool need_addr_change = false; 2325 2326 #ifndef HAVE_HOST_CONTROLLER_API 2327 need_baud_change = hci_stack->config 2328 && hci_stack->chipset 2329 && hci_stack->chipset->set_baudrate_command 2330 && hci_stack->hci_transport->set_baudrate 2331 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2332 2333 need_addr_change = hci_stack->custom_bd_addr_set 2334 && hci_stack->chipset 2335 && hci_stack->chipset->set_bd_addr_command; 2336 #endif 2337 2338 switch(hci_stack->substate){ 2339 2340 #ifndef HAVE_HOST_CONTROLLER_API 2341 case HCI_INIT_SEND_RESET: 2342 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2343 // fix: just correct substate and behave as command below 2344 2345 /* fall through */ 2346 #endif 2347 2348 case HCI_INIT_W4_SEND_RESET: 2349 btstack_run_loop_remove_timer(&hci_stack->timeout); 2350 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2351 return; 2352 2353 #ifndef HAVE_HOST_CONTROLLER_API 2354 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2355 // for STLC2500D, baud rate change already happened. 2356 // for others, baud rate gets changed now 2357 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2358 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2359 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2360 hci_stack->hci_transport->set_baudrate(baud_rate); 2361 } 2362 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2363 return; 2364 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2365 btstack_run_loop_remove_timer(&hci_stack->timeout); 2366 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2367 return; 2368 case HCI_INIT_W4_CUSTOM_INIT: 2369 // repeat custom init 2370 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2371 return; 2372 #endif 2373 2374 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2375 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2376 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2377 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2378 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2379 return; 2380 } 2381 if (need_addr_change){ 2382 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2383 return; 2384 } 2385 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2386 return; 2387 #ifndef HAVE_HOST_CONTROLLER_API 2388 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2389 if (need_baud_change){ 2390 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2391 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2392 hci_stack->hci_transport->set_baudrate(baud_rate); 2393 } 2394 if (need_addr_change){ 2395 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2396 return; 2397 } 2398 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2399 return; 2400 case HCI_INIT_W4_SET_BD_ADDR: 2401 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2402 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2403 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2404 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2405 return; 2406 } 2407 // skipping st warm boot 2408 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2409 return; 2410 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2411 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2412 return; 2413 #endif 2414 2415 case HCI_INIT_DONE: 2416 // set state if we came here by fall through 2417 hci_stack->substate = HCI_INIT_DONE; 2418 return; 2419 2420 default: 2421 break; 2422 } 2423 hci_initializing_next_state(); 2424 } 2425 2426 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2427 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2428 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2429 // check if we have been aware of the HCI connection 2430 switch (conn->state){ 2431 case SENT_CREATE_CONNECTION: 2432 case RECEIVED_CONNECTION_REQUEST: 2433 break; 2434 default: 2435 return; 2436 } 2437 2438 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2439 bd_addr_t bd_address; 2440 (void)memcpy(&bd_address, conn->address, 6); 2441 2442 #ifdef ENABLE_CLASSIC 2443 // cache needed data 2444 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2445 #endif 2446 2447 // connection failed, remove entry 2448 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2449 btstack_memory_hci_connection_free( conn ); 2450 2451 #ifdef ENABLE_CLASSIC 2452 // notify client if dedicated bonding 2453 if (notify_dedicated_bonding_failed){ 2454 log_info("hci notify_dedicated_bonding_failed"); 2455 hci_emit_dedicated_bonding_result(bd_address, status); 2456 } 2457 2458 // if authentication error, also delete link key 2459 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2460 gap_drop_link_key_for_bd_addr(bd_address); 2461 } 2462 #else 2463 UNUSED(status); 2464 #endif 2465 } 2466 2467 #ifdef ENABLE_CLASSIC 2468 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2469 // SSP Controller 2470 if (features[6] & (1 << 3)){ 2471 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2472 } 2473 // eSCO 2474 if (features[3] & (1<<7)){ 2475 conn->remote_supported_features[0] |= 1; 2476 } 2477 // Extended features 2478 if (features[7] & (1<<7)){ 2479 conn->remote_supported_features[0] |= 2; 2480 } 2481 } 2482 2483 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2484 // SSP Host 2485 if (features[0] & (1 << 0)){ 2486 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2487 } 2488 // SC Host 2489 if (features[0] & (1 << 3)){ 2490 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2491 } 2492 } 2493 2494 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2495 // SC Controller 2496 if (features[1] & (1 << 0)){ 2497 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2498 } 2499 } 2500 2501 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2502 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2503 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2504 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2505 if (conn->bonding_flags & BONDING_DEDICATED){ 2506 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2507 } 2508 } 2509 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2510 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2511 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2512 } 2513 2514 #endif 2515 2516 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2517 // handle BT initialization 2518 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2519 hci_initializing_event_handler(packet, size); 2520 } 2521 2522 // help with BT sleep 2523 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2524 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2525 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2526 && (hci_event_command_complete_get_command_opcode(packet) == HCI_OPCODE_HCI_WRITE_SCAN_ENABLE)){ 2527 hci_initializing_next_state(); 2528 } 2529 } 2530 2531 #ifdef ENABLE_CLASSIC 2532 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2533 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2534 conn->encryption_key_size = encryption_key_size; 2535 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2536 2537 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2538 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2539 conn->bonding_flags &= ~BONDING_DEDICATED; 2540 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2541 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2542 return; 2543 } 2544 2545 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2546 conn->requested_security_level = LEVEL_0; 2547 hci_emit_security_level(conn->con_handle, security_level); 2548 return; 2549 } 2550 2551 // Request remote features if not already done 2552 hci_trigger_remote_features_for_connection(conn); 2553 2554 // Request Authentication if not already done 2555 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2556 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2557 } 2558 #endif 2559 2560 static void hci_store_local_supported_commands(const uint8_t * packet){ 2561 // create mapping table 2562 #define X(name, offset, bit) { offset, bit }, 2563 static struct { 2564 uint8_t byte_offset; 2565 uint8_t bit_position; 2566 } supported_hci_commands_map [] = { 2567 SUPPORTED_HCI_COMMANDS 2568 }; 2569 #undef X 2570 2571 // create names for debug purposes 2572 #ifdef ENABLE_LOG_DEBUG 2573 #define X(name, offset, bit) #name, 2574 static const char * command_names[] = { 2575 SUPPORTED_HCI_COMMANDS 2576 }; 2577 #undef X 2578 #endif 2579 2580 hci_stack->local_supported_commands = 0; 2581 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2582 uint16_t i; 2583 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2584 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2585 #ifdef ENABLE_LOG_DEBUG 2586 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); 2587 #else 2588 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2589 #endif 2590 hci_stack->local_supported_commands |= (1LU << i); 2591 } 2592 } 2593 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2594 } 2595 2596 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2597 UNUSED(size); 2598 2599 uint16_t manufacturer; 2600 #ifdef ENABLE_CLASSIC 2601 hci_con_handle_t handle; 2602 hci_connection_t * conn; 2603 #endif 2604 #if defined(ENABLE_CLASSIC) || (defined(ENABLE_BLE) && defined(ENABLE_LE_ISOCHRONOUS_STREAMS)) 2605 uint8_t status; 2606 #endif 2607 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2608 le_audio_cig_t * cig; 2609 #endif 2610 2611 // get num cmd packets - limit to 1 to reduce complexity 2612 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2613 2614 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2615 switch (opcode){ 2616 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2617 if (packet[5]) break; 2618 // terminate, name 248 chars 2619 packet[6+248] = 0; 2620 log_info("local name: %s", &packet[6]); 2621 break; 2622 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2623 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2624 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2625 uint16_t acl_len = little_endian_read_16(packet, 6); 2626 uint16_t sco_len = packet[8]; 2627 2628 // determine usable ACL/SCO payload size 2629 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2630 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2631 2632 hci_stack->acl_packets_total_num = (uint8_t) little_endian_read_16(packet, 9); 2633 hci_stack->sco_packets_total_num = (uint8_t) little_endian_read_16(packet, 11); 2634 2635 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2636 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2637 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2638 } 2639 break; 2640 case HCI_OPCODE_HCI_READ_RSSI: 2641 if (packet[5] == ERROR_CODE_SUCCESS){ 2642 uint8_t event[5]; 2643 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2644 event[1] = 3; 2645 (void)memcpy(&event[2], &packet[6], 3); 2646 hci_emit_event(event, sizeof(event), 1); 2647 } 2648 break; 2649 #ifdef ENABLE_BLE 2650 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2651 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2652 hci_stack->le_iso_packets_total_num = packet[11]; 2653 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2654 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2655 2656 /* fall through */ 2657 2658 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2659 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2660 hci_stack->le_acl_packets_total_num = packet[8]; 2661 // determine usable ACL payload size 2662 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2663 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2664 } 2665 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); 2666 break; 2667 #endif 2668 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2669 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2670 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2671 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2672 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); 2673 break; 2674 #endif 2675 #ifdef ENABLE_LE_CENTRAL 2676 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2677 hci_stack->le_whitelist_capacity = packet[6]; 2678 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2679 break; 2680 #endif 2681 #ifdef ENABLE_LE_PERIPHERAL 2682 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2683 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2684 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2685 break; 2686 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2687 if (hci_stack->le_advertising_set_in_current_command != 0) { 2688 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2689 hci_stack->le_advertising_set_in_current_command = 0; 2690 if (advertising_set == NULL) break; 2691 uint8_t adv_status = packet[6]; 2692 uint8_t tx_power = packet[7]; 2693 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 }; 2694 if (adv_status == 0){ 2695 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2696 } 2697 hci_emit_event(event, sizeof(event), 1); 2698 } 2699 break; 2700 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2701 if (hci_stack->le_advertising_set_in_current_command != 0) { 2702 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2703 hci_stack->le_advertising_set_in_current_command = 0; 2704 if (advertising_set == NULL) break; 2705 uint8_t adv_status = packet[5]; 2706 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2707 if (adv_status == 0){ 2708 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2709 } 2710 hci_emit_event(event, sizeof(event), 1); 2711 } 2712 break; 2713 #endif 2714 #endif 2715 case HCI_OPCODE_HCI_READ_BD_ADDR: 2716 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2717 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)); 2718 #ifdef ENABLE_CLASSIC 2719 if (hci_stack->link_key_db){ 2720 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2721 } 2722 #endif 2723 break; 2724 #ifdef ENABLE_CLASSIC 2725 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2726 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 2727 break; 2728 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2729 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2730 if (status == ERROR_CODE_SUCCESS) { 2731 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2732 } else { 2733 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2734 } 2735 break; 2736 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2737 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2738 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2739 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2740 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2741 hci_emit_event(event, sizeof(event), 1); 2742 } 2743 break; 2744 #endif 2745 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2746 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2747 2748 #ifdef ENABLE_CLASSIC 2749 // determine usable ACL packet types based on host buffer size and supported features 2750 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2751 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2752 #endif 2753 // Classic/LE 2754 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2755 break; 2756 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2757 manufacturer = little_endian_read_16(packet, 10); 2758 // map Cypress to Broadcom 2759 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2760 log_info("Treat Cypress as Broadcom"); 2761 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2762 little_endian_store_16(packet, 10, manufacturer); 2763 } 2764 hci_stack->manufacturer = manufacturer; 2765 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2766 break; 2767 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2768 hci_store_local_supported_commands(packet); 2769 break; 2770 #ifdef ENABLE_CLASSIC 2771 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2772 if (packet[5]) return; 2773 hci_stack->synchronous_flow_control_enabled = 1; 2774 break; 2775 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2776 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2777 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2778 conn = hci_connection_for_handle(handle); 2779 if (conn != NULL) { 2780 uint8_t key_size = 0; 2781 if (status == 0){ 2782 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2783 log_info("Handle %04x key Size: %u", handle, key_size); 2784 } else { 2785 key_size = 1; 2786 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2787 } 2788 hci_handle_read_encryption_key_size_complete(conn, key_size); 2789 } 2790 break; 2791 // assert pairing complete event is emitted. 2792 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2793 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2794 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2795 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2796 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2797 // lookup connection by gap pairing addr 2798 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2799 if (conn == NULL) break; 2800 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2801 break; 2802 2803 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2804 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2805 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2806 uint8_t event[67]; 2807 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2808 event[1] = 65; 2809 (void)memset(&event[2], 0, 65); 2810 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2811 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2812 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2813 event[2] = 3; 2814 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2815 } else { 2816 event[2] = 1; 2817 } 2818 } 2819 hci_emit_event(event, sizeof(event), 0); 2820 break; 2821 } 2822 2823 // note: only needed if user does not provide OOB data 2824 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2825 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2826 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2827 if (conn == NULL) break; 2828 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2829 break; 2830 #endif 2831 #endif 2832 #ifdef ENABLE_BLE 2833 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2834 case HCI_OPCODE_HCI_LE_SET_CIG_PARAMETERS: 2835 // lookup CIG 2836 cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 2837 if (cig != NULL){ 2838 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2839 uint8_t i = 0; 2840 if (status == ERROR_CODE_SUCCESS){ 2841 // assign CIS handles to pre-allocated CIS 2842 btstack_linked_list_iterator_t it; 2843 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 2844 while (btstack_linked_list_iterator_has_next(&it) && (i < cig->num_cis)) { 2845 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 2846 if ((iso_stream->group_id == hci_stack->iso_active_operation_group_id) && 2847 (iso_stream->iso_type == HCI_ISO_TYPE_CIS)){ 2848 hci_con_handle_t cis_handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3+(2*i)); 2849 iso_stream->con_handle = cis_handle; 2850 cig->cis_con_handles[i] = cis_handle; 2851 i++; 2852 } 2853 } 2854 cig->state = LE_AUDIO_CIG_STATE_W4_CIS_REQUEST; 2855 hci_emit_cig_created(cig, status); 2856 } else { 2857 hci_emit_cig_created(cig, status); 2858 btstack_linked_list_remove(&hci_stack->le_audio_cigs, (btstack_linked_item_t *) cig); 2859 } 2860 } 2861 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2862 break; 2863 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2864 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2865 if (status != ERROR_CODE_SUCCESS){ 2866 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 2867 } 2868 break; 2869 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2870 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2871 if (status != ERROR_CODE_SUCCESS){ 2872 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 2873 } 2874 break; 2875 case HCI_OPCODE_HCI_LE_SETUP_ISO_DATA_PATH: { 2876 // lookup BIG by state 2877 btstack_linked_list_iterator_t it; 2878 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 2879 while (btstack_linked_list_iterator_has_next(&it)) { 2880 le_audio_big_t *big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 2881 if (big->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2882 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2883 if (status == ERROR_CODE_SUCCESS){ 2884 big->state_vars.next_bis++; 2885 if (big->state_vars.next_bis == big->num_bis){ 2886 big->state = LE_AUDIO_BIG_STATE_ACTIVE; 2887 hci_emit_big_created(big, ERROR_CODE_SUCCESS); 2888 } else { 2889 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2890 } 2891 } else { 2892 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2893 big->state_vars.status = status; 2894 } 2895 return; 2896 } 2897 } 2898 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2899 while (btstack_linked_list_iterator_has_next(&it)) { 2900 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2901 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2902 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2903 if (status == ERROR_CODE_SUCCESS){ 2904 big_sync->state_vars.next_bis++; 2905 if (big_sync->state_vars.next_bis == big_sync->num_bis){ 2906 big_sync->state = LE_AUDIO_BIG_STATE_ACTIVE; 2907 hci_emit_big_sync_created(big_sync, ERROR_CODE_SUCCESS); 2908 } else { 2909 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2910 } 2911 } else { 2912 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2913 big_sync->state_vars.status = status; 2914 } 2915 return; 2916 } 2917 } 2918 // Lookup CIS via active group operation 2919 if (hci_stack->iso_active_operation_type == HCI_ISO_TYPE_CIS){ 2920 if (hci_stack->iso_active_operation_group_id == HCI_ISO_GROUP_ID_SINGLE_CIS){ 2921 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2922 2923 // lookup CIS by state 2924 btstack_linked_list_iterator_t it; 2925 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 2926 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2927 while (btstack_linked_list_iterator_has_next(&it)){ 2928 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 2929 handle = iso_stream->con_handle; 2930 switch (iso_stream->state){ 2931 case HCI_ISO_STREAM_STATE_W4_ISO_SETUP_INPUT: 2932 if (status != ERROR_CODE_SUCCESS){ 2933 hci_iso_stream_finalize(iso_stream); 2934 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, status); 2935 break; 2936 } 2937 if (iso_stream->max_sdu_c_to_p > 0){ 2938 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT; 2939 } else { 2940 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, ERROR_CODE_SUCCESS); 2941 } 2942 break; 2943 case HCI_ISO_STREAM_STATE_W4_ISO_SETUP_OUTPUT: 2944 if (status != ERROR_CODE_SUCCESS){ 2945 hci_iso_stream_finalize(iso_stream); 2946 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, status); 2947 break; 2948 } 2949 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, ERROR_CODE_SUCCESS); 2950 break; 2951 default: 2952 break; 2953 } 2954 } 2955 } else { 2956 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2957 cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 2958 if (cig != NULL) { 2959 // emit cis created if all ISO Paths have been created 2960 // assume we are central 2961 uint8_t cis_index = cig->state_vars.next_cis >> 1; 2962 uint8_t cis_direction = cig->state_vars.next_cis & 1; 2963 bool outgoing_needed = cig->params->cis_params[cis_index].max_sdu_p_to_c > 0; 2964 // if outgoing has been setup, or incoming was setup but outgoing not required 2965 if ((cis_direction == 1) || (outgoing_needed == false)){ 2966 hci_emit_cis_created(cig->cig_id, cig->cis_con_handles[cis_index], status); 2967 } 2968 // next state 2969 cig->state_vars.next_cis++; 2970 cig->state = LE_AUDIO_CIG_STATE_SETUP_ISO_PATH; 2971 } 2972 } 2973 } 2974 break; 2975 } 2976 case HCI_OPCODE_HCI_LE_BIG_TERMINATE_SYNC: { 2977 // lookup BIG by state 2978 btstack_linked_list_iterator_t it; 2979 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2980 while (btstack_linked_list_iterator_has_next(&it)) { 2981 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2982 uint8_t big_handle = big_sync->big_handle; 2983 switch (big_sync->state){ 2984 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 2985 btstack_linked_list_iterator_remove(&it); 2986 hci_emit_big_sync_created(big_sync, big_sync->state_vars.status); 2987 return; 2988 default: 2989 btstack_linked_list_iterator_remove(&it); 2990 hci_emit_big_sync_stopped(big_handle); 2991 return; 2992 } 2993 } 2994 break; 2995 } 2996 #endif 2997 #endif 2998 default: 2999 break; 3000 } 3001 } 3002 3003 static void handle_command_status_event(uint8_t * packet, uint16_t size) { 3004 UNUSED(size); 3005 3006 // get num cmd packets - limit to 1 to reduce complexity 3007 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 3008 3009 // get opcode and command status 3010 uint16_t opcode = hci_event_command_status_get_command_opcode(packet); 3011 3012 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) || defined(ENABLE_LE_ISOCHRONOUS_STREAMS) 3013 uint8_t status = hci_event_command_status_get_status(packet); 3014 #endif 3015 3016 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 3017 bd_addr_type_t addr_type; 3018 #endif 3019 3020 switch (opcode){ 3021 #ifdef ENABLE_CLASSIC 3022 case HCI_OPCODE_HCI_CREATE_CONNECTION: 3023 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 3024 #endif 3025 #ifdef ENABLE_LE_CENTRAL 3026 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 3027 #endif 3028 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 3029 addr_type = hci_stack->outgoing_addr_type; 3030 3031 // reset outgoing address info 3032 memset(hci_stack->outgoing_addr, 0, 6); 3033 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 3034 3035 // on error 3036 if (status != ERROR_CODE_SUCCESS){ 3037 #ifdef ENABLE_LE_CENTRAL 3038 if (hci_is_le_connection_type(addr_type)){ 3039 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3040 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3041 } 3042 #endif 3043 // error => outgoing connection failed 3044 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 3045 if (conn != NULL){ 3046 hci_handle_connection_failed(conn, status); 3047 } 3048 } 3049 break; 3050 #endif 3051 #ifdef ENABLE_CLASSIC 3052 case HCI_OPCODE_HCI_INQUIRY: 3053 if (status == ERROR_CODE_SUCCESS) { 3054 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3055 } else { 3056 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3057 } 3058 break; 3059 #endif 3060 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3061 case HCI_OPCODE_HCI_LE_CREATE_CIS: 3062 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 3063 if (status == ERROR_CODE_SUCCESS){ 3064 hci_iso_stream_requested_confirm(HCI_ISO_GROUP_ID_INVALID); 3065 } else { 3066 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 3067 } 3068 break; 3069 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 3070 default: 3071 break; 3072 } 3073 } 3074 3075 #ifdef ENABLE_BLE 3076 static void event_handle_le_connection_complete(const uint8_t * packet){ 3077 bd_addr_t addr; 3078 bd_addr_type_t addr_type; 3079 hci_connection_t * conn; 3080 3081 // Connection management 3082 reverse_bd_addr(&packet[8], addr); 3083 addr_type = (bd_addr_type_t)packet[7]; 3084 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 3085 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3086 3087 #ifdef ENABLE_LE_CENTRAL 3088 // handle error: error is reported only to the initiator -> outgoing connection 3089 if (packet[3]){ 3090 3091 // handle cancelled outgoing connection 3092 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 3093 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 3094 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 3095 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 3096 // reset state 3097 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3098 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3099 // get outgoing connection conn struct for direct connect 3100 conn = gap_get_outgoing_connection(); 3101 } 3102 3103 // outgoing le connection establishment is done 3104 if (conn){ 3105 // remove entry 3106 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3107 btstack_memory_hci_connection_free( conn ); 3108 } 3109 return; 3110 } 3111 #endif 3112 3113 // on success, both hosts receive connection complete event 3114 if (packet[6] == HCI_ROLE_MASTER){ 3115 #ifdef ENABLE_LE_CENTRAL 3116 // if we're master on an le connection, it was an outgoing connection and we're done with it 3117 // note: no hci_connection_t object exists yet for connect with whitelist 3118 if (hci_is_le_connection_type(addr_type)){ 3119 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3120 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3121 } 3122 #endif 3123 } else { 3124 #ifdef ENABLE_LE_PERIPHERAL 3125 // if we're slave, it was an incoming connection, advertisements have stopped 3126 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3127 #endif 3128 } 3129 3130 // LE connections are auto-accepted, so just create a connection if there isn't one already 3131 if (!conn){ 3132 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3133 } 3134 3135 // no memory, sorry. 3136 if (!conn){ 3137 return; 3138 } 3139 3140 conn->state = OPEN; 3141 conn->role = packet[6]; 3142 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 3143 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 3144 3145 #ifdef ENABLE_LE_PERIPHERAL 3146 if (packet[6] == HCI_ROLE_SLAVE){ 3147 hci_update_advertisements_enabled_for_current_roles(); 3148 } 3149 #endif 3150 3151 // init unenhanced att bearer mtu 3152 conn->att_connection.mtu = ATT_DEFAULT_MTU; 3153 conn->att_connection.mtu_exchanged = false; 3154 3155 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 3156 3157 // restart timer 3158 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3159 // btstack_run_loop_add_timer(&conn->timeout); 3160 3161 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3162 3163 hci_emit_nr_connections_changed(); 3164 } 3165 #endif 3166 3167 #ifdef ENABLE_CLASSIC 3168 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){ 3169 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 3170 // LEVEL_4 is tested by l2cap 3171 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 3172 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 3173 if (level >= LEVEL_3){ 3174 // MITM not possible without keyboard or display 3175 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3176 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3177 3178 // MITM possible if one side has keyboard and the other has keyboard or display 3179 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3180 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3181 3182 // MITM not possible if one side has only display and other side has no keyboard 3183 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3184 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3185 } 3186 // LEVEL 2 requires SSP, which is a given 3187 return true; 3188 } 3189 3190 static bool btstack_is_null(uint8_t * data, uint16_t size){ 3191 uint16_t i; 3192 for (i=0; i < size ; i++){ 3193 if (data[i] != 0) { 3194 return false; 3195 } 3196 } 3197 return true; 3198 } 3199 3200 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 3201 // get requested security level 3202 gap_security_level_t requested_security_level = conn->requested_security_level; 3203 if (hci_stack->gap_secure_connections_only_mode){ 3204 requested_security_level = LEVEL_4; 3205 } 3206 3207 // assess security: LEVEL 4 requires SC 3208 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 3209 if ((requested_security_level == LEVEL_4) && 3210 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 3211 !hci_remote_sc_enabled(conn)){ 3212 log_info("Level 4 required, but SC not supported -> abort"); 3213 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3214 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3215 return; 3216 } 3217 3218 // assess security based on io capabilities 3219 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 3220 // responder: fully validate io caps of both sides as well as OOB data 3221 bool security_possible = false; 3222 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 3223 3224 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3225 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 3226 // so we merge the OOB data availability 3227 uint8_t have_oob_data = conn->io_cap_response_oob_data; 3228 if (conn->classic_oob_c_192 != NULL){ 3229 have_oob_data |= 1; 3230 } 3231 if (conn->classic_oob_c_256 != NULL){ 3232 have_oob_data |= 2; 3233 } 3234 // for up to Level 3, either P-192 as well as P-256 will do 3235 // 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 3236 // if remote does not SC, we should not receive P-256 data either 3237 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 3238 security_possible = true; 3239 } 3240 // for Level 4, P-256 is needed 3241 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 3242 security_possible = true; 3243 } 3244 #endif 3245 3246 if (security_possible == false){ 3247 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 3248 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3249 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3250 return; 3251 } 3252 } else { 3253 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 3254 #ifndef ENABLE_CLASSIC_PAIRING_OOB 3255 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3256 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 3257 log_info("Level 3+ required, but no input/output -> abort"); 3258 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3259 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3260 return; 3261 } 3262 #endif 3263 #endif 3264 } 3265 3266 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3267 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 3268 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 3269 } else { 3270 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3271 } 3272 #endif 3273 } 3274 3275 #endif 3276 3277 static void event_handler(uint8_t *packet, uint16_t size){ 3278 3279 uint16_t event_length = packet[1]; 3280 3281 // assert packet is complete 3282 if (size != (event_length + 2u)){ 3283 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 3284 return; 3285 } 3286 3287 hci_con_handle_t handle; 3288 hci_connection_t * conn; 3289 int i; 3290 3291 #ifdef ENABLE_CLASSIC 3292 hci_link_type_t link_type; 3293 bd_addr_t addr; 3294 bd_addr_type_t addr_type; 3295 #endif 3296 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3297 hci_iso_stream_t * iso_stream; 3298 le_audio_big_t * big; 3299 le_audio_big_sync_t * big_sync; 3300 #endif 3301 3302 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 3303 3304 switch (hci_event_packet_get_type(packet)) { 3305 3306 case HCI_EVENT_COMMAND_COMPLETE: 3307 handle_command_complete_event(packet, size); 3308 break; 3309 3310 case HCI_EVENT_COMMAND_STATUS: 3311 handle_command_status_event(packet, size); 3312 break; 3313 3314 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3315 if (size < 3) return; 3316 uint16_t num_handles = packet[2]; 3317 if (size != (3u + num_handles * 4u)) return; 3318 #ifdef ENABLE_CLASSIC 3319 bool notify_sco = false; 3320 #endif 3321 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3322 bool notify_iso = false; 3323 #endif 3324 uint16_t offset = 3; 3325 for (i=0; i<num_handles;i++){ 3326 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3327 offset += 2u; 3328 uint16_t num_packets = little_endian_read_16(packet, offset); 3329 offset += 2u; 3330 3331 conn = hci_connection_for_handle(handle); 3332 if (conn != NULL) { 3333 3334 if (conn->num_packets_sent >= num_packets) { 3335 conn->num_packets_sent -= num_packets; 3336 } else { 3337 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3338 conn->num_packets_sent = 0; 3339 } 3340 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3341 #ifdef ENABLE_CLASSIC 3342 if (conn->address_type == BD_ADDR_TYPE_SCO){ 3343 notify_sco = true; 3344 } 3345 #endif 3346 } 3347 3348 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 3349 hci_controller_dump_packets(); 3350 #endif 3351 3352 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3353 if (conn == NULL){ 3354 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(handle); 3355 if (iso_stream != NULL){ 3356 if (iso_stream->num_packets_sent >= num_packets) { 3357 iso_stream->num_packets_sent -= num_packets; 3358 } else { 3359 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3360 iso_stream->num_packets_sent = 0; 3361 } 3362 if (iso_stream->iso_type == HCI_ISO_TYPE_BIS){ 3363 le_audio_big_t * big = hci_big_for_handle(iso_stream->group_id); 3364 if (big != NULL){ 3365 big->num_completed_timestamp_current_valid = true; 3366 big->num_completed_timestamp_current_ms = btstack_run_loop_get_time_ms(); 3367 } 3368 } 3369 log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", 3370 num_packets, handle, iso_stream->num_packets_sent); 3371 notify_iso = true; 3372 } 3373 } 3374 #endif 3375 } 3376 3377 #ifdef ENABLE_CLASSIC 3378 if (notify_sco){ 3379 hci_notify_if_sco_can_send_now(); 3380 } 3381 #endif 3382 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3383 if (notify_iso){ 3384 hci_iso_notify_can_send_now(); 3385 } 3386 #endif 3387 break; 3388 } 3389 3390 #ifdef ENABLE_CLASSIC 3391 case HCI_EVENT_FLUSH_OCCURRED: 3392 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3393 handle = hci_event_flush_occurred_get_handle(packet); 3394 conn = hci_connection_for_handle(handle); 3395 if (conn) { 3396 log_info("Flush occurred, disconnect 0x%04x", handle); 3397 conn->state = SEND_DISCONNECT; 3398 } 3399 break; 3400 3401 case HCI_EVENT_INQUIRY_COMPLETE: 3402 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3403 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3404 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3405 hci_emit_event(event, sizeof(event), 1); 3406 } 3407 break; 3408 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3409 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3410 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3411 } 3412 break; 3413 case HCI_EVENT_CONNECTION_REQUEST: 3414 reverse_bd_addr(&packet[2], addr); 3415 link_type = (hci_link_type_t) packet[11]; 3416 3417 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3418 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3419 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3420 bd_addr_copy(hci_stack->decline_addr, addr); 3421 break; 3422 } 3423 3424 if (hci_stack->gap_classic_accept_callback != NULL){ 3425 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3426 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS; 3427 bd_addr_copy(hci_stack->decline_addr, addr); 3428 break; 3429 } 3430 } 3431 3432 // TODO: eval COD 8-10 3433 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3434 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3435 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3436 if (!conn) { 3437 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3438 } 3439 if (!conn) { 3440 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3441 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3442 bd_addr_copy(hci_stack->decline_addr, addr); 3443 hci_run(); 3444 // avoid event to higher layer 3445 return; 3446 } 3447 conn->role = HCI_ROLE_SLAVE; 3448 conn->state = RECEIVED_CONNECTION_REQUEST; 3449 // store info about eSCO 3450 if (link_type == HCI_LINK_TYPE_ESCO){ 3451 conn->remote_supported_features[0] |= 1; 3452 } 3453 hci_run(); 3454 break; 3455 3456 case HCI_EVENT_CONNECTION_COMPLETE: 3457 // Connection management 3458 reverse_bd_addr(&packet[5], addr); 3459 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3460 addr_type = BD_ADDR_TYPE_ACL; 3461 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3462 if (conn) { 3463 if (!packet[2]){ 3464 conn->state = OPEN; 3465 conn->con_handle = little_endian_read_16(packet, 3); 3466 3467 // trigger write supervision timeout if we're master 3468 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3469 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3470 } 3471 3472 // trigger write automatic flush timeout 3473 if (hci_stack->automatic_flush_timeout != 0){ 3474 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3475 } 3476 3477 // restart timer 3478 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3479 btstack_run_loop_add_timer(&conn->timeout); 3480 3481 // trigger remote features for dedicated bonding 3482 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3483 hci_trigger_remote_features_for_connection(conn); 3484 } 3485 3486 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3487 3488 hci_emit_nr_connections_changed(); 3489 } else { 3490 // connection failed 3491 hci_handle_connection_failed(conn, packet[2]); 3492 } 3493 } 3494 break; 3495 3496 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3497 reverse_bd_addr(&packet[5], addr); 3498 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3499 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3500 if (packet[2]){ 3501 // connection failed 3502 if (conn){ 3503 hci_handle_connection_failed(conn, packet[2]); 3504 } 3505 break; 3506 } 3507 if (!conn) { 3508 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3509 } 3510 if (!conn) { 3511 break; 3512 } 3513 conn->state = OPEN; 3514 conn->con_handle = little_endian_read_16(packet, 3); 3515 3516 #ifdef ENABLE_SCO_OVER_HCI 3517 // update SCO 3518 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3519 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3520 } 3521 // trigger can send now 3522 if (hci_have_usb_transport()){ 3523 hci_stack->sco_can_send_now = true; 3524 } 3525 #endif 3526 #ifdef HAVE_SCO_TRANSPORT 3527 // configure sco transport 3528 if (hci_stack->sco_transport != NULL){ 3529 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3530 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3531 } 3532 #endif 3533 break; 3534 3535 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3536 handle = little_endian_read_16(packet, 3); 3537 conn = hci_connection_for_handle(handle); 3538 if (!conn) break; 3539 if (!packet[2]){ 3540 const uint8_t * features = &packet[5]; 3541 hci_handle_remote_features_page_0(conn, features); 3542 3543 // read extended features if possible 3544 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3545 && ((conn->remote_supported_features[0] & 2) != 0)) { 3546 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3547 break; 3548 } 3549 } 3550 hci_handle_remote_features_received(conn); 3551 break; 3552 3553 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3554 handle = little_endian_read_16(packet, 3); 3555 conn = hci_connection_for_handle(handle); 3556 if (!conn) break; 3557 // status = ok, page = 1 3558 if (!packet[2]) { 3559 uint8_t page_number = packet[5]; 3560 uint8_t maximum_page_number = packet[6]; 3561 const uint8_t * features = &packet[7]; 3562 bool done = false; 3563 switch (page_number){ 3564 case 1: 3565 hci_handle_remote_features_page_1(conn, features); 3566 if (maximum_page_number >= 2){ 3567 // get Secure Connections (Controller) from Page 2 if available 3568 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3569 } else { 3570 // otherwise, assume SC (Controller) == SC (Host) 3571 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3572 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3573 } 3574 done = true; 3575 } 3576 break; 3577 case 2: 3578 hci_handle_remote_features_page_2(conn, features); 3579 done = true; 3580 break; 3581 default: 3582 break; 3583 } 3584 if (!done) break; 3585 } 3586 hci_handle_remote_features_received(conn); 3587 break; 3588 3589 case HCI_EVENT_LINK_KEY_REQUEST: 3590 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3591 hci_event_link_key_request_get_bd_addr(packet, addr); 3592 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3593 if (!conn) break; 3594 3595 // lookup link key in db if not cached 3596 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3597 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3598 } 3599 3600 // response sent by hci_run() 3601 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3602 #endif 3603 break; 3604 3605 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3606 hci_event_link_key_request_get_bd_addr(packet, addr); 3607 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3608 if (!conn) break; 3609 3610 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3611 3612 // CVE-2020-26555: ignore NULL link key 3613 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3614 if (btstack_is_null(&packet[8], 16)) break; 3615 3616 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3617 // Change Connection Encryption keeps link key type 3618 if (link_key_type != CHANGED_COMBINATION_KEY){ 3619 conn->link_key_type = link_key_type; 3620 } 3621 3622 // cache link key. link keys stored in little-endian format for legacy reasons 3623 memcpy(&conn->link_key, &packet[8], 16); 3624 3625 // only store link key: 3626 // - if bondable enabled 3627 if (hci_stack->bondable == false) break; 3628 // - if security level sufficient 3629 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3630 // - for SSP, also check if remote side requested bonding as well 3631 if (conn->link_key_type != COMBINATION_KEY){ 3632 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3633 if (!remote_bonding){ 3634 break; 3635 } 3636 } 3637 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3638 break; 3639 } 3640 3641 case HCI_EVENT_PIN_CODE_REQUEST: 3642 hci_event_pin_code_request_get_bd_addr(packet, addr); 3643 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3644 if (!conn) break; 3645 3646 hci_pairing_started(conn, false); 3647 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3648 if (!hci_stack->bondable ){ 3649 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3650 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3651 hci_run(); 3652 return; 3653 } 3654 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3655 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3656 log_info("Level 4 required, but SC not supported -> abort"); 3657 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3658 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3659 hci_run(); 3660 return; 3661 } 3662 break; 3663 3664 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3665 hci_event_io_capability_response_get_bd_addr(packet, addr); 3666 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3667 if (!conn) break; 3668 3669 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3670 hci_pairing_started(conn, true); 3671 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3672 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3673 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3674 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3675 #endif 3676 break; 3677 3678 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3679 hci_event_io_capability_response_get_bd_addr(packet, addr); 3680 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3681 if (!conn) break; 3682 3683 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3684 hci_connection_timestamp(conn); 3685 hci_pairing_started(conn, true); 3686 break; 3687 3688 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3689 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3690 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3691 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3692 if (!conn) break; 3693 3694 hci_connection_timestamp(conn); 3695 3696 hci_pairing_started(conn, true); 3697 3698 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3699 break; 3700 #endif 3701 3702 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3703 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3704 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3705 if (!conn) break; 3706 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3707 if (hci_stack->ssp_auto_accept){ 3708 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3709 }; 3710 } else { 3711 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3712 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3713 // don't forward event to app 3714 hci_run(); 3715 return; 3716 } 3717 break; 3718 3719 case HCI_EVENT_USER_PASSKEY_REQUEST: 3720 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3721 if (hci_stack->ssp_auto_accept){ 3722 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3723 }; 3724 break; 3725 3726 case HCI_EVENT_MODE_CHANGE: 3727 handle = hci_event_mode_change_get_handle(packet); 3728 conn = hci_connection_for_handle(handle); 3729 if (!conn) break; 3730 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3731 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3732 break; 3733 #endif 3734 3735 case HCI_EVENT_ENCRYPTION_CHANGE: 3736 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3737 handle = hci_event_encryption_change_get_connection_handle(packet); 3738 conn = hci_connection_for_handle(handle); 3739 if (!conn) break; 3740 if (hci_event_encryption_change_get_status(packet) == 0u) { 3741 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3742 if (encryption_enabled){ 3743 if (hci_is_le_connection(conn)){ 3744 // For LE, we accept connection as encrypted 3745 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3746 } 3747 #ifdef ENABLE_CLASSIC 3748 else { 3749 3750 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3751 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3752 bool connected_uses_aes_ccm = encryption_enabled == 2; 3753 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3754 log_info("SC during pairing, but only E0 now -> abort"); 3755 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3756 break; 3757 } 3758 3759 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3760 if (connected_uses_aes_ccm){ 3761 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3762 } 3763 3764 #ifdef ENABLE_TESTING_SUPPORT 3765 // work around for issue with PTS dongle 3766 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3767 #endif 3768 // validate encryption key size 3769 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3770 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3771 // already got encryption key size 3772 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3773 } else { 3774 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3775 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3776 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3777 } else { 3778 // if not, pretend everything is perfect 3779 hci_handle_read_encryption_key_size_complete(conn, 16); 3780 } 3781 } 3782 } 3783 #endif 3784 } else { 3785 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3786 } 3787 } else { 3788 uint8_t status = hci_event_encryption_change_get_status(packet); 3789 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3790 conn->bonding_flags &= ~BONDING_DEDICATED; 3791 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3792 conn->bonding_status = status; 3793 } 3794 } 3795 3796 break; 3797 3798 #ifdef ENABLE_CLASSIC 3799 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3800 handle = hci_event_authentication_complete_get_connection_handle(packet); 3801 conn = hci_connection_for_handle(handle); 3802 if (!conn) break; 3803 3804 // clear authentication active flag 3805 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3806 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3807 3808 // authenticated only if auth status == 0 3809 if (hci_event_authentication_complete_get_status(packet) == 0){ 3810 // authenticated 3811 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3812 3813 // If not already encrypted, start encryption 3814 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3815 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3816 break; 3817 } 3818 } 3819 3820 // emit updated security level 3821 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3822 break; 3823 3824 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3825 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3826 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3827 if (!conn) break; 3828 3829 // treat successfully paired connection as authenticated 3830 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3831 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3832 } 3833 3834 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3835 break; 3836 #endif 3837 3838 // HCI_EVENT_DISCONNECTION_COMPLETE 3839 // has been split, to first notify stack before shutting connection down 3840 // see end of function, too. 3841 case HCI_EVENT_DISCONNECTION_COMPLETE: 3842 if (packet[2]) break; // status != 0 3843 handle = little_endian_read_16(packet, 3); 3844 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3845 if (hci_stack->acl_fragmentation_total_size > 0u) { 3846 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3847 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3848 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3849 hci_stack->acl_fragmentation_total_size = 0; 3850 hci_stack->acl_fragmentation_pos = 0; 3851 if (release_buffer){ 3852 hci_release_packet_buffer(); 3853 } 3854 } 3855 } 3856 3857 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3858 // drop outgoing ISO fragments if it is for closed connection and release buffer if tx not active 3859 if (hci_stack->iso_fragmentation_total_size > 0u) { 3860 if (handle == READ_ISO_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3861 int release_buffer = hci_stack->iso_fragmentation_tx_active == 0u; 3862 log_info("drop fragmented ISO data for closed connection, release buffer %u", release_buffer); 3863 hci_stack->iso_fragmentation_total_size = 0; 3864 hci_stack->iso_fragmentation_pos = 0; 3865 if (release_buffer){ 3866 hci_release_packet_buffer(); 3867 } 3868 } 3869 } 3870 3871 // finalize iso stream if handle matches 3872 iso_stream = hci_iso_stream_for_con_handle(handle); 3873 if (iso_stream != NULL){ 3874 hci_iso_stream_finalize(iso_stream); 3875 break; 3876 } 3877 #endif 3878 3879 conn = hci_connection_for_handle(handle); 3880 if (!conn) break; 3881 #ifdef ENABLE_CLASSIC 3882 // pairing failed if it was ongoing 3883 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3884 #endif 3885 3886 // emit dedicatd bonding event 3887 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3888 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3889 } 3890 3891 // mark connection for shutdown, stop timers, reset state 3892 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3893 hci_connection_stop_timer(conn); 3894 hci_connection_init(conn); 3895 3896 #ifdef ENABLE_BLE 3897 #ifdef ENABLE_LE_PERIPHERAL 3898 // re-enable advertisements for le connections if active 3899 if (hci_is_le_connection(conn)){ 3900 hci_update_advertisements_enabled_for_current_roles(); 3901 } 3902 #endif 3903 #endif 3904 break; 3905 3906 case HCI_EVENT_HARDWARE_ERROR: 3907 log_error("Hardware Error: 0x%02x", packet[2]); 3908 if (hci_stack->hardware_error_callback){ 3909 (*hci_stack->hardware_error_callback)(packet[2]); 3910 } else { 3911 // if no special requests, just reboot stack 3912 hci_power_control_off(); 3913 hci_power_control_on(); 3914 } 3915 break; 3916 3917 #ifdef ENABLE_CLASSIC 3918 case HCI_EVENT_ROLE_CHANGE: 3919 if (packet[2]) break; // status != 0 3920 reverse_bd_addr(&packet[3], addr); 3921 addr_type = BD_ADDR_TYPE_ACL; 3922 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3923 if (!conn) break; 3924 conn->role = packet[9]; 3925 break; 3926 #endif 3927 3928 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3929 // release packet buffer only for asynchronous transport and if there are not further fragments 3930 if (hci_transport_synchronous()) { 3931 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3932 return; // instead of break: to avoid re-entering hci_run() 3933 } 3934 hci_stack->acl_fragmentation_tx_active = 0; 3935 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3936 hci_stack->iso_fragmentation_tx_active = 0; 3937 if (hci_stack->iso_fragmentation_total_size) break; 3938 #endif 3939 if (hci_stack->acl_fragmentation_total_size) break; 3940 hci_release_packet_buffer(); 3941 3942 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3943 hci_iso_notify_can_send_now(); 3944 #endif 3945 // L2CAP receives this event via the hci_emit_event below 3946 3947 #ifdef ENABLE_CLASSIC 3948 // For SCO, we do the can_send_now_check here 3949 hci_notify_if_sco_can_send_now(); 3950 #endif 3951 break; 3952 3953 #ifdef ENABLE_CLASSIC 3954 case HCI_EVENT_SCO_CAN_SEND_NOW: 3955 // For SCO, we do the can_send_now_check here 3956 hci_stack->sco_can_send_now = true; 3957 hci_notify_if_sco_can_send_now(); 3958 return; 3959 3960 // explode inquriy results for easier consumption 3961 case HCI_EVENT_INQUIRY_RESULT: 3962 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3963 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3964 gap_inquiry_explode(packet, size); 3965 break; 3966 #endif 3967 3968 #ifdef ENABLE_BLE 3969 case HCI_EVENT_LE_META: 3970 switch (packet[2]){ 3971 #ifdef ENABLE_LE_CENTRAL 3972 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3973 if (!hci_stack->le_scanning_enabled) break; 3974 le_handle_advertisement_report(packet, size); 3975 break; 3976 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3977 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3978 if (!hci_stack->le_scanning_enabled) break; 3979 le_handle_extended_advertisement_report(packet, size); 3980 break; 3981 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 3982 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 3983 hci_stack->le_periodic_sync_state = LE_CONNECTING_IDLE; 3984 break; 3985 #endif 3986 #endif 3987 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3988 event_handle_le_connection_complete(packet); 3989 break; 3990 3991 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3992 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3993 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3994 conn = hci_connection_for_handle(handle); 3995 if (!conn) break; 3996 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3997 break; 3998 3999 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 4000 // connection 4001 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 4002 conn = hci_connection_for_handle(handle); 4003 if (conn) { 4004 // read arguments 4005 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 4006 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 4007 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 4008 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 4009 4010 // validate against current connection parameter range 4011 le_connection_parameter_range_t existing_range; 4012 gap_get_connection_parameter_range(&existing_range); 4013 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 4014 if (update_parameter){ 4015 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 4016 conn->le_conn_interval_min = le_conn_interval_min; 4017 conn->le_conn_interval_max = le_conn_interval_max; 4018 conn->le_conn_latency = le_conn_latency; 4019 conn->le_supervision_timeout = le_supervision_timeout; 4020 } else { 4021 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 4022 } 4023 } 4024 break; 4025 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 4026 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 4027 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 4028 conn = hci_connection_for_handle(handle); 4029 if (conn) { 4030 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 4031 } 4032 break; 4033 #endif 4034 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4035 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 4036 if (hci_stack->iso_active_operation_type == HCI_ISO_TYPE_CIS){ 4037 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 4038 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 4039 iso_stream = hci_iso_stream_for_con_handle(handle); 4040 btstack_assert(iso_stream != NULL); 4041 // track SDU 4042 iso_stream->max_sdu_c_to_p = hci_subevent_le_cis_established_get_max_pdu_c_to_p(packet); 4043 iso_stream->max_sdu_p_to_c = hci_subevent_le_cis_established_get_max_pdu_p_to_c(packet); 4044 if (hci_stack->iso_active_operation_group_id == HCI_ISO_GROUP_ID_SINGLE_CIS){ 4045 // CIS Accept by Peripheral 4046 if (status == ERROR_CODE_SUCCESS){ 4047 if (iso_stream->max_sdu_p_to_c > 0){ 4048 // we're peripheral and we will send data 4049 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT; 4050 } else { 4051 // we're peripheral and we will only receive data 4052 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_OUTPUT; 4053 } 4054 } else { 4055 hci_iso_stream_finalize(iso_stream); 4056 hci_emit_cis_created(HCI_ISO_GROUP_ID_INVALID, handle, status); 4057 } 4058 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4059 } else { 4060 // CIG Setup by Central 4061 le_audio_cig_t * cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 4062 btstack_assert(cig != NULL); 4063 // update iso stream state 4064 if (status == ERROR_CODE_SUCCESS){ 4065 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 4066 } else { 4067 iso_stream->state = HCI_ISO_STREAM_STATE_IDLE; 4068 } 4069 // update cig state 4070 uint8_t i; 4071 for (i=0;i<cig->num_cis;i++){ 4072 if (cig->cis_con_handles[i] == handle){ 4073 cig->cis_setup_active[i] = false; 4074 if (status == ERROR_CODE_SUCCESS){ 4075 cig->cis_setup_active[i] = false; 4076 cig->cis_established[i] = true; 4077 } else { 4078 hci_emit_cis_created(cig->cig_id, handle, status); 4079 } 4080 } 4081 } 4082 4083 // trigger iso path setup if complete 4084 bool setup_active = false; 4085 for (i=0;i<cig->num_cis;i++){ 4086 setup_active |= cig->cis_setup_active[i]; 4087 } 4088 if (setup_active == false){ 4089 cig->state_vars.next_cis = 0; 4090 cig->state = LE_AUDIO_CIG_STATE_SETUP_ISO_PATH; 4091 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4092 } 4093 } 4094 } 4095 break; 4096 case HCI_SUBEVENT_LE_CREATE_BIG_COMPLETE: 4097 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4098 big = hci_big_for_handle(packet[4]); 4099 if (big != NULL){ 4100 uint8_t status = packet[3]; 4101 if (status == ERROR_CODE_SUCCESS){ 4102 // store bis_con_handles and trigger iso path setup 4103 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[20]); 4104 uint8_t i; 4105 for (i=0;i<num_bis;i++){ 4106 hci_con_handle_t bis_handle = (hci_con_handle_t) little_endian_read_16(packet, 21 + (2 * i)); 4107 big->bis_con_handles[i] = bis_handle; 4108 // assign bis handle 4109 btstack_linked_list_iterator_t it; 4110 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 4111 while (btstack_linked_list_iterator_has_next(&it)){ 4112 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 4113 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 4114 (iso_stream->group_id == big->big_handle)){ 4115 iso_stream->con_handle = bis_handle; 4116 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 4117 break; 4118 } 4119 } 4120 } 4121 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4122 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4123 big->state_vars.next_bis = 0; 4124 } 4125 } else { 4126 // create BIG failed or has been stopped by us 4127 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big->big_handle); 4128 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4129 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED){ 4130 hci_emit_big_created(big, status); 4131 } else { 4132 hci_emit_big_terminated(big); 4133 } 4134 } 4135 } 4136 break; 4137 case HCI_SUBEVENT_LE_TERMINATE_BIG_COMPLETE: 4138 big = hci_big_for_handle(hci_subevent_le_terminate_big_complete_get_big_handle(packet)); 4139 if (big != NULL){ 4140 // finalize associated ISO streams 4141 btstack_linked_list_iterator_t it; 4142 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 4143 while (btstack_linked_list_iterator_has_next(&it)){ 4144 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 4145 if (iso_stream->group_id == big->big_handle){ 4146 log_info("BIG Terminated, big_handle 0x%02x, con handle 0x%04x", iso_stream->group_id, iso_stream->con_handle); 4147 btstack_linked_list_iterator_remove(&it); 4148 btstack_memory_hci_iso_stream_free(iso_stream); 4149 } 4150 } 4151 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4152 switch (big->state){ 4153 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 4154 hci_emit_big_created(big, big->state_vars.status); 4155 break; 4156 default: 4157 hci_emit_big_terminated(big); 4158 break; 4159 } 4160 } 4161 break; 4162 case HCI_SUBEVENT_LE_BIG_SYNC_ESTABLISHED: 4163 big_sync = hci_big_sync_for_handle(packet[4]); 4164 if (big_sync != NULL){ 4165 uint8_t status = packet[3]; 4166 uint8_t big_handle = packet[4]; 4167 if (status == ERROR_CODE_SUCCESS){ 4168 // store bis_con_handles and trigger iso path setup 4169 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[16]); 4170 uint8_t i; 4171 for (i=0;i<num_bis;i++){ 4172 big_sync->bis_con_handles[i] = little_endian_read_16(packet, 17 + (2 * i)); 4173 } 4174 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4175 // trigger iso path setup 4176 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4177 big_sync->state_vars.next_bis = 0; 4178 } 4179 } else { 4180 // create BIG Sync failed or has been stopped by us 4181 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4182 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4183 hci_emit_big_sync_created(big_sync, status); 4184 } else { 4185 hci_emit_big_sync_stopped(big_handle); 4186 } 4187 } 4188 } 4189 break; 4190 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 4191 big_sync = hci_big_sync_for_handle(packet[4]); 4192 if (big_sync != NULL){ 4193 uint8_t big_handle = packet[4]; 4194 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4195 hci_emit_big_sync_stopped(big_handle); 4196 } 4197 break; 4198 #endif 4199 default: 4200 break; 4201 } 4202 break; 4203 #endif 4204 case HCI_EVENT_VENDOR_SPECIFIC: 4205 // Vendor specific commands often create vendor specific event instead of num completed packets 4206 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 4207 switch (hci_stack->manufacturer){ 4208 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 4209 hci_stack->num_cmd_packets = 1; 4210 break; 4211 default: 4212 break; 4213 } 4214 break; 4215 default: 4216 break; 4217 } 4218 4219 handle_event_for_current_stack_state(packet, size); 4220 4221 // notify upper stack 4222 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 4223 4224 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 4225 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 4226 handle = little_endian_read_16(packet, 3); 4227 hci_connection_t * aConn = hci_connection_for_handle(handle); 4228 // discard connection if app did not trigger a reconnect in the event handler 4229 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4230 hci_shutdown_connection(aConn); 4231 } 4232 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 4233 hci_controller_dump_packets(); 4234 #endif 4235 } 4236 4237 // execute main loop 4238 hci_run(); 4239 } 4240 4241 #ifdef ENABLE_CLASSIC 4242 4243 #ifdef ENABLE_SCO_OVER_HCI 4244 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 4245 static void sco_schedule_tx(hci_connection_t * conn); 4246 4247 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 4248 log_debug("SCO TX Timeout"); 4249 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 4250 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4251 if (!conn) return; 4252 4253 // trigger send 4254 conn->sco_tx_ready = 1; 4255 // extra packet if CVSD but SCO buffer is too short 4256 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 4257 conn->sco_tx_ready++; 4258 } 4259 hci_notify_if_sco_can_send_now(); 4260 } 4261 4262 4263 #define SCO_TX_AFTER_RX_MS (6) 4264 4265 static void sco_schedule_tx(hci_connection_t * conn){ 4266 4267 uint32_t now = btstack_run_loop_get_time_ms(); 4268 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 4269 int time_delta_ms = sco_tx_ms - now; 4270 4271 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 4272 4273 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 4274 btstack_run_loop_remove_timer(timer); 4275 btstack_run_loop_set_timer(timer, time_delta_ms); 4276 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 4277 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 4278 btstack_run_loop_add_timer(timer); 4279 } 4280 #endif 4281 4282 static void sco_handler(uint8_t * packet, uint16_t size){ 4283 // lookup connection struct 4284 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 4285 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4286 if (!conn) return; 4287 4288 #ifdef ENABLE_SCO_OVER_HCI 4289 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 4290 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 4291 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 4292 packet[2] = 0x3c; 4293 memmove(&packet[3], &packet[23], 63); 4294 size = 63; 4295 } 4296 } 4297 4298 if (hci_have_usb_transport()){ 4299 // Nothing to do 4300 } else { 4301 // 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); 4302 if (hci_stack->synchronous_flow_control_enabled == 0){ 4303 uint32_t now = btstack_run_loop_get_time_ms(); 4304 4305 if (!conn->sco_rx_valid){ 4306 // ignore first 10 packets 4307 conn->sco_rx_count++; 4308 // log_debug("sco rx count %u", conn->sco_rx_count); 4309 if (conn->sco_rx_count == 10) { 4310 // use first timestamp as is and pretent it just started 4311 conn->sco_rx_ms = now; 4312 conn->sco_rx_valid = 1; 4313 conn->sco_rx_count = 0; 4314 sco_schedule_tx(conn); 4315 } 4316 } else { 4317 // track expected arrival timme 4318 conn->sco_rx_count++; 4319 conn->sco_rx_ms += 7; 4320 int delta = (int32_t) (now - conn->sco_rx_ms); 4321 if (delta > 0){ 4322 conn->sco_rx_ms++; 4323 } 4324 // log_debug("sco rx %u", conn->sco_rx_ms); 4325 sco_schedule_tx(conn); 4326 } 4327 } 4328 } 4329 #endif 4330 4331 // deliver to app 4332 if (hci_stack->sco_packet_handler) { 4333 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 4334 } 4335 4336 #ifdef HAVE_SCO_TRANSPORT 4337 // We can send one packet for each received packet 4338 conn->sco_tx_ready++; 4339 hci_notify_if_sco_can_send_now(); 4340 #endif 4341 4342 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4343 conn->num_packets_completed++; 4344 hci_stack->host_completed_packets = 1; 4345 hci_run(); 4346 #endif 4347 } 4348 #endif 4349 4350 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 4351 hci_dump_packet(packet_type, 1, packet, size); 4352 switch (packet_type) { 4353 case HCI_EVENT_PACKET: 4354 event_handler(packet, size); 4355 break; 4356 case HCI_ACL_DATA_PACKET: 4357 acl_handler(packet, size); 4358 break; 4359 #ifdef ENABLE_CLASSIC 4360 case HCI_SCO_DATA_PACKET: 4361 sco_handler(packet, size); 4362 break; 4363 #endif 4364 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4365 case HCI_ISO_DATA_PACKET: 4366 hci_iso_packet_handler(packet, size); 4367 break; 4368 #endif 4369 default: 4370 break; 4371 } 4372 } 4373 4374 /** 4375 * @brief Add event packet handler. 4376 */ 4377 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4378 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4379 } 4380 4381 /** 4382 * @brief Remove event packet handler. 4383 */ 4384 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4385 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4386 } 4387 4388 /** Register HCI packet handlers */ 4389 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 4390 hci_stack->acl_packet_handler = handler; 4391 } 4392 4393 #ifdef ENABLE_CLASSIC 4394 /** 4395 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 4396 */ 4397 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 4398 hci_stack->sco_packet_handler = handler; 4399 } 4400 #endif 4401 4402 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4403 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 4404 hci_stack->iso_packet_handler = handler; 4405 } 4406 #endif 4407 4408 static void hci_state_reset(void){ 4409 // no connections yet 4410 hci_stack->connections = NULL; 4411 4412 // keep discoverable/connectable as this has been requested by the client(s) 4413 // hci_stack->discoverable = 0; 4414 // hci_stack->connectable = 0; 4415 // hci_stack->bondable = 1; 4416 // hci_stack->own_addr_type = 0; 4417 4418 // buffer is free 4419 hci_stack->hci_packet_buffer_reserved = false; 4420 4421 // no pending cmds 4422 hci_stack->decline_reason = 0; 4423 4424 hci_stack->secure_connections_active = false; 4425 4426 #ifdef ENABLE_CLASSIC 4427 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 4428 hci_stack->page_timeout = 0x6000; // ca. 15 sec 4429 4430 hci_stack->gap_tasks_classic = 4431 GAP_TASK_SET_DEFAULT_LINK_POLICY | 4432 GAP_TASK_SET_CLASS_OF_DEVICE | 4433 GAP_TASK_SET_LOCAL_NAME | 4434 GAP_TASK_SET_EIR_DATA | 4435 GAP_TASK_WRITE_SCAN_ENABLE | 4436 GAP_TASK_WRITE_PAGE_TIMEOUT; 4437 #endif 4438 4439 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4440 hci_stack->classic_read_local_oob_data = false; 4441 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 4442 #endif 4443 4444 // LE 4445 #ifdef ENABLE_BLE 4446 memset(hci_stack->le_random_address, 0, 6); 4447 hci_stack->le_random_address_set = 0; 4448 #endif 4449 #ifdef ENABLE_LE_CENTRAL 4450 hci_stack->le_scanning_active = false; 4451 hci_stack->le_scanning_param_update = true; 4452 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4453 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 4454 hci_stack->le_whitelist_capacity = 0; 4455 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4456 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 4457 #endif 4458 #endif 4459 #ifdef ENABLE_LE_PERIPHERAL 4460 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4461 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 4462 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4463 } 4464 if (hci_stack->le_advertisements_data != NULL){ 4465 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4466 } 4467 #endif 4468 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4469 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4470 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_INVALID; 4471 #endif 4472 } 4473 4474 #ifdef ENABLE_CLASSIC 4475 /** 4476 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4477 */ 4478 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4479 // store and open remote device db 4480 hci_stack->link_key_db = link_key_db; 4481 if (hci_stack->link_key_db) { 4482 hci_stack->link_key_db->open(); 4483 } 4484 } 4485 #endif 4486 4487 void hci_init(const hci_transport_t *transport, const void *config){ 4488 4489 #ifdef HAVE_MALLOC 4490 if (!hci_stack) { 4491 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4492 } 4493 #else 4494 hci_stack = &hci_stack_static; 4495 #endif 4496 memset(hci_stack, 0, sizeof(hci_stack_t)); 4497 4498 // reference to use transport layer implementation 4499 hci_stack->hci_transport = transport; 4500 4501 // reference to used config 4502 hci_stack->config = config; 4503 4504 // setup pointer for outgoing packet buffer 4505 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4506 4507 // max acl payload size defined in config.h 4508 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4509 4510 // register packet handlers with transport 4511 transport->register_packet_handler(&packet_handler); 4512 4513 hci_stack->state = HCI_STATE_OFF; 4514 4515 // class of device 4516 hci_stack->class_of_device = 0x007a020c; // Smartphone 4517 4518 // bondable by default 4519 hci_stack->bondable = 1; 4520 4521 #ifdef ENABLE_CLASSIC 4522 // classic name 4523 hci_stack->local_name = default_classic_name; 4524 4525 // Master slave policy 4526 hci_stack->master_slave_policy = 1; 4527 4528 // Allow Role Switch 4529 hci_stack->allow_role_switch = 1; 4530 4531 // Default / minimum security level = 2 4532 hci_stack->gap_security_level = LEVEL_2; 4533 4534 // Default Security Mode 4 4535 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4536 4537 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4538 hci_stack->gap_required_encyrption_key_size = 7; 4539 4540 // Link Supervision Timeout 4541 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4542 4543 #endif 4544 4545 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4546 hci_stack->ssp_enable = 1; 4547 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4548 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4549 hci_stack->ssp_auto_accept = 1; 4550 4551 // Secure Connections: enable (requires support from Controller) 4552 hci_stack->secure_connections_enable = true; 4553 4554 // voice setting - signed 16 bit pcm data with CVSD over the air 4555 hci_stack->sco_voice_setting = 0x60; 4556 4557 #ifdef ENABLE_LE_CENTRAL 4558 // connection parameter to use for outgoing connections 4559 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4560 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4561 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4562 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4563 hci_stack->le_connection_latency = 4; // 4 4564 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4565 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4566 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4567 4568 // default LE Scanning 4569 hci_stack->le_scan_type = 0x1; // active 4570 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4571 hci_stack->le_scan_window = 0x30; // 30 ms 4572 #endif 4573 4574 #ifdef ENABLE_LE_PERIPHERAL 4575 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4576 #endif 4577 4578 // connection parameter range used to answer connection parameter update requests in l2cap 4579 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4580 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4581 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4582 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4583 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4584 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4585 4586 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4587 hci_stack->iso_packets_to_queue = 1; 4588 #endif 4589 4590 hci_state_reset(); 4591 } 4592 4593 void hci_deinit(void){ 4594 btstack_run_loop_remove_timer(&hci_stack->timeout); 4595 #ifdef HAVE_MALLOC 4596 if (hci_stack) { 4597 free(hci_stack); 4598 } 4599 #endif 4600 hci_stack = NULL; 4601 4602 #ifdef ENABLE_CLASSIC 4603 disable_l2cap_timeouts = 0; 4604 #endif 4605 } 4606 4607 /** 4608 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4609 */ 4610 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4611 hci_stack->chipset = chipset_driver; 4612 4613 // reset chipset driver - init is also called on power_up 4614 if (hci_stack->chipset && hci_stack->chipset->init){ 4615 hci_stack->chipset->init(hci_stack->config); 4616 } 4617 } 4618 4619 /** 4620 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4621 */ 4622 void hci_set_control(const btstack_control_t *hardware_control){ 4623 // references to used control implementation 4624 hci_stack->control = hardware_control; 4625 // init with transport config 4626 hardware_control->init(hci_stack->config); 4627 } 4628 4629 static void hci_discard_connections(void){ 4630 btstack_linked_list_iterator_t it; 4631 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4632 while (btstack_linked_list_iterator_has_next(&it)){ 4633 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4634 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4635 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4636 hci_shutdown_connection(connection); 4637 } 4638 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4639 while (hci_stack->iso_streams != NULL){ 4640 hci_iso_stream_finalize((hci_iso_stream_t *) hci_stack->iso_streams); 4641 } 4642 #endif 4643 } 4644 4645 void hci_close(void){ 4646 4647 #ifdef ENABLE_CLASSIC 4648 // close remote device db 4649 if (hci_stack->link_key_db) { 4650 hci_stack->link_key_db->close(); 4651 } 4652 #endif 4653 4654 hci_discard_connections(); 4655 4656 hci_power_control(HCI_POWER_OFF); 4657 4658 #ifdef HAVE_MALLOC 4659 free(hci_stack); 4660 #endif 4661 hci_stack = NULL; 4662 } 4663 4664 #ifdef HAVE_SCO_TRANSPORT 4665 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4666 hci_stack->sco_transport = sco_transport; 4667 sco_transport->register_packet_handler(&packet_handler); 4668 } 4669 #endif 4670 4671 #ifdef ENABLE_CLASSIC 4672 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4673 // validate ranage and set 4674 if (encryption_key_size < 7) return; 4675 if (encryption_key_size > 16) return; 4676 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4677 } 4678 4679 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4680 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4681 hci_stack->gap_security_mode = security_mode; 4682 return ERROR_CODE_SUCCESS; 4683 } else { 4684 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4685 } 4686 } 4687 4688 gap_security_mode_t gap_get_security_mode(void){ 4689 return hci_stack->gap_security_mode; 4690 } 4691 4692 void gap_set_security_level(gap_security_level_t security_level){ 4693 hci_stack->gap_security_level = security_level; 4694 } 4695 4696 gap_security_level_t gap_get_security_level(void){ 4697 if (hci_stack->gap_secure_connections_only_mode){ 4698 return LEVEL_4; 4699 } 4700 return hci_stack->gap_security_level; 4701 } 4702 4703 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4704 hci_stack->gap_minimal_service_security_level = security_level; 4705 } 4706 4707 void gap_set_secure_connections_only_mode(bool enable){ 4708 hci_stack->gap_secure_connections_only_mode = enable; 4709 } 4710 4711 bool gap_get_secure_connections_only_mode(void){ 4712 return hci_stack->gap_secure_connections_only_mode; 4713 } 4714 #endif 4715 4716 #ifdef ENABLE_CLASSIC 4717 void gap_set_class_of_device(uint32_t class_of_device){ 4718 hci_stack->class_of_device = class_of_device; 4719 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4720 hci_run(); 4721 } 4722 4723 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4724 hci_stack->default_link_policy_settings = default_link_policy_settings; 4725 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4726 hci_run(); 4727 } 4728 4729 void gap_set_allow_role_switch(bool allow_role_switch){ 4730 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4731 } 4732 4733 uint8_t hci_get_allow_role_switch(void){ 4734 return hci_stack->allow_role_switch; 4735 } 4736 4737 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4738 hci_stack->link_supervision_timeout = link_supervision_timeout; 4739 } 4740 4741 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4742 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4743 } 4744 4745 uint16_t hci_automatic_flush_timeout(void){ 4746 return hci_stack->automatic_flush_timeout; 4747 } 4748 4749 void hci_disable_l2cap_timeout_check(void){ 4750 disable_l2cap_timeouts = 1; 4751 } 4752 #endif 4753 4754 #ifndef HAVE_HOST_CONTROLLER_API 4755 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4756 void hci_set_bd_addr(bd_addr_t addr){ 4757 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4758 hci_stack->custom_bd_addr_set = 1; 4759 } 4760 #endif 4761 4762 // State-Module-Driver overview 4763 // state module low-level 4764 // HCI_STATE_OFF off close 4765 // HCI_STATE_INITIALIZING, on open 4766 // HCI_STATE_WORKING, on open 4767 // HCI_STATE_HALTING, on open 4768 // HCI_STATE_SLEEPING, off/sleep close 4769 // HCI_STATE_FALLING_ASLEEP on open 4770 4771 static int hci_power_control_on(void){ 4772 4773 // power on 4774 int err = 0; 4775 if (hci_stack->control && hci_stack->control->on){ 4776 err = (*hci_stack->control->on)(); 4777 } 4778 if (err){ 4779 log_error( "POWER_ON failed"); 4780 hci_emit_hci_open_failed(); 4781 return err; 4782 } 4783 4784 // int chipset driver 4785 if (hci_stack->chipset && hci_stack->chipset->init){ 4786 hci_stack->chipset->init(hci_stack->config); 4787 } 4788 4789 // init transport 4790 if (hci_stack->hci_transport->init){ 4791 hci_stack->hci_transport->init(hci_stack->config); 4792 } 4793 4794 // open transport 4795 err = hci_stack->hci_transport->open(); 4796 if (err){ 4797 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4798 if (hci_stack->control && hci_stack->control->off){ 4799 (*hci_stack->control->off)(); 4800 } 4801 hci_emit_hci_open_failed(); 4802 return err; 4803 } 4804 return 0; 4805 } 4806 4807 static void hci_power_control_off(void){ 4808 4809 log_info("hci_power_control_off"); 4810 4811 // close low-level device 4812 hci_stack->hci_transport->close(); 4813 4814 log_info("hci_power_control_off - hci_transport closed"); 4815 4816 // power off 4817 if (hci_stack->control && hci_stack->control->off){ 4818 (*hci_stack->control->off)(); 4819 } 4820 4821 log_info("hci_power_control_off - control closed"); 4822 4823 hci_stack->state = HCI_STATE_OFF; 4824 } 4825 4826 static void hci_power_control_sleep(void){ 4827 4828 log_info("hci_power_control_sleep"); 4829 4830 #if 0 4831 // don't close serial port during sleep 4832 4833 // close low-level device 4834 hci_stack->hci_transport->close(hci_stack->config); 4835 #endif 4836 4837 // sleep mode 4838 if (hci_stack->control && hci_stack->control->sleep){ 4839 (*hci_stack->control->sleep)(); 4840 } 4841 4842 hci_stack->state = HCI_STATE_SLEEPING; 4843 } 4844 4845 static int hci_power_control_wake(void){ 4846 4847 log_info("hci_power_control_wake"); 4848 4849 // wake on 4850 if (hci_stack->control && hci_stack->control->wake){ 4851 (*hci_stack->control->wake)(); 4852 } 4853 4854 #if 0 4855 // open low-level device 4856 int err = hci_stack->hci_transport->open(hci_stack->config); 4857 if (err){ 4858 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4859 if (hci_stack->control && hci_stack->control->off){ 4860 (*hci_stack->control->off)(); 4861 } 4862 hci_emit_hci_open_failed(); 4863 return err; 4864 } 4865 #endif 4866 4867 return 0; 4868 } 4869 4870 static void hci_power_enter_initializing_state(void){ 4871 // set up state machine 4872 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4873 hci_stack->hci_packet_buffer_reserved = false; 4874 hci_stack->state = HCI_STATE_INITIALIZING; 4875 hci_stack->substate = HCI_INIT_SEND_RESET; 4876 } 4877 4878 static void hci_power_enter_halting_state(void){ 4879 #ifdef ENABLE_BLE 4880 hci_whitelist_free(); 4881 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4882 hci_periodic_advertiser_list_free(); 4883 #endif 4884 #endif 4885 // see hci_run 4886 hci_stack->state = HCI_STATE_HALTING; 4887 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4888 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4889 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4890 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4891 btstack_run_loop_add_timer(&hci_stack->timeout); 4892 } 4893 4894 // returns error 4895 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4896 int err; 4897 switch (power_mode){ 4898 case HCI_POWER_ON: 4899 err = hci_power_control_on(); 4900 if (err != 0) { 4901 log_error("hci_power_control_on() error %d", err); 4902 return err; 4903 } 4904 hci_power_enter_initializing_state(); 4905 break; 4906 case HCI_POWER_OFF: 4907 // do nothing 4908 break; 4909 case HCI_POWER_SLEEP: 4910 // do nothing (with SLEEP == OFF) 4911 break; 4912 default: 4913 btstack_assert(false); 4914 break; 4915 } 4916 return ERROR_CODE_SUCCESS; 4917 } 4918 4919 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4920 switch (power_mode){ 4921 case HCI_POWER_ON: 4922 // do nothing 4923 break; 4924 case HCI_POWER_OFF: 4925 // no connections yet, just turn it off 4926 hci_power_control_off(); 4927 break; 4928 case HCI_POWER_SLEEP: 4929 // no connections yet, just turn it off 4930 hci_power_control_sleep(); 4931 break; 4932 default: 4933 btstack_assert(false); 4934 break; 4935 } 4936 return ERROR_CODE_SUCCESS; 4937 } 4938 4939 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4940 switch (power_mode){ 4941 case HCI_POWER_ON: 4942 // do nothing 4943 break; 4944 case HCI_POWER_OFF: 4945 hci_power_enter_halting_state(); 4946 break; 4947 case HCI_POWER_SLEEP: 4948 // see hci_run 4949 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4950 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4951 break; 4952 default: 4953 btstack_assert(false); 4954 break; 4955 } 4956 return ERROR_CODE_SUCCESS; 4957 } 4958 4959 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4960 switch (power_mode){ 4961 case HCI_POWER_ON: 4962 hci_power_enter_initializing_state(); 4963 break; 4964 case HCI_POWER_OFF: 4965 // do nothing 4966 break; 4967 case HCI_POWER_SLEEP: 4968 // see hci_run 4969 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4970 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4971 break; 4972 default: 4973 btstack_assert(false); 4974 break; 4975 } 4976 return ERROR_CODE_SUCCESS; 4977 } 4978 4979 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4980 switch (power_mode){ 4981 case HCI_POWER_ON: 4982 hci_power_enter_initializing_state(); 4983 break; 4984 case HCI_POWER_OFF: 4985 hci_power_enter_halting_state(); 4986 break; 4987 case HCI_POWER_SLEEP: 4988 // do nothing 4989 break; 4990 default: 4991 btstack_assert(false); 4992 break; 4993 } 4994 return ERROR_CODE_SUCCESS; 4995 } 4996 4997 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4998 int err; 4999 switch (power_mode){ 5000 case HCI_POWER_ON: 5001 err = hci_power_control_wake(); 5002 if (err) return err; 5003 hci_power_enter_initializing_state(); 5004 break; 5005 case HCI_POWER_OFF: 5006 hci_power_enter_halting_state(); 5007 break; 5008 case HCI_POWER_SLEEP: 5009 // do nothing 5010 break; 5011 default: 5012 btstack_assert(false); 5013 break; 5014 } 5015 return ERROR_CODE_SUCCESS; 5016 } 5017 5018 int hci_power_control(HCI_POWER_MODE power_mode){ 5019 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 5020 int err = 0; 5021 switch (hci_stack->state){ 5022 case HCI_STATE_OFF: 5023 err = hci_power_control_state_off(power_mode); 5024 break; 5025 case HCI_STATE_INITIALIZING: 5026 err = hci_power_control_state_initializing(power_mode); 5027 break; 5028 case HCI_STATE_WORKING: 5029 err = hci_power_control_state_working(power_mode); 5030 break; 5031 case HCI_STATE_HALTING: 5032 err = hci_power_control_state_halting(power_mode); 5033 break; 5034 case HCI_STATE_FALLING_ASLEEP: 5035 err = hci_power_control_state_falling_asleep(power_mode); 5036 break; 5037 case HCI_STATE_SLEEPING: 5038 err = hci_power_control_state_sleeping(power_mode); 5039 break; 5040 default: 5041 btstack_assert(false); 5042 break; 5043 } 5044 if (err != 0){ 5045 return err; 5046 } 5047 5048 // create internal event 5049 hci_emit_state(); 5050 5051 // trigger next/first action 5052 hci_run(); 5053 5054 return 0; 5055 } 5056 5057 5058 static void hci_halting_run(void) { 5059 5060 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5061 5062 hci_connection_t *connection; 5063 #ifdef ENABLE_BLE 5064 #ifdef ENABLE_LE_PERIPHERAL 5065 bool stop_advertismenets; 5066 #endif 5067 #endif 5068 5069 switch (hci_stack->substate) { 5070 case HCI_HALTING_CLASSIC_STOP: 5071 #ifdef ENABLE_CLASSIC 5072 if (!hci_can_send_command_packet_now()) return; 5073 5074 if (hci_stack->connectable || hci_stack->discoverable){ 5075 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 5076 hci_send_cmd(&hci_write_scan_enable, 0); 5077 return; 5078 } 5079 #endif 5080 /* fall through */ 5081 5082 case HCI_HALTING_LE_ADV_STOP: 5083 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 5084 5085 #ifdef ENABLE_BLE 5086 #ifdef ENABLE_LE_PERIPHERAL 5087 if (!hci_can_send_command_packet_now()) return; 5088 5089 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 5090 5091 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5092 if (hci_extended_advertising_supported()){ 5093 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5094 btstack_linked_list_iterator_t it; 5095 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5096 // stop all periodic advertisements and check if an extended set is active 5097 while (btstack_linked_list_iterator_has_next(&it)){ 5098 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5099 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5100 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5101 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 5102 return; 5103 } 5104 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5105 stop_advertismenets = true; 5106 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5107 } 5108 } 5109 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5110 if (stop_advertismenets){ 5111 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5112 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 5113 return; 5114 } 5115 } 5116 else 5117 #else /* ENABLE_LE_PERIPHERAL */ 5118 { 5119 if (stop_advertismenets) { 5120 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5121 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5122 return; 5123 } 5124 } 5125 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 5126 #endif /* ENABLE_LE_PERIPHERAL */ 5127 #endif /* ENABLE_BLE */ 5128 5129 /* fall through */ 5130 5131 case HCI_HALTING_LE_SCAN_STOP: 5132 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 5133 if (!hci_can_send_command_packet_now()) return; 5134 5135 #ifdef ENABLE_BLE 5136 #ifdef ENABLE_LE_CENTRAL 5137 if (hci_stack->le_scanning_active){ 5138 hci_le_scan_stop(); 5139 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 5140 return; 5141 } 5142 #endif 5143 #endif 5144 5145 /* fall through */ 5146 5147 case HCI_HALTING_DISCONNECT_ALL: 5148 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 5149 if (!hci_can_send_command_packet_now()) return; 5150 5151 // close all open connections 5152 connection = (hci_connection_t *) hci_stack->connections; 5153 if (connection) { 5154 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5155 5156 // check state 5157 if (connection->state == SENT_DISCONNECT) return; 5158 connection->state = SENT_DISCONNECT; 5159 5160 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5161 5162 // finally, send the disconnect command 5163 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5164 return; 5165 } 5166 5167 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5168 // stop BIGs and BIG Syncs 5169 if (hci_stack->le_audio_bigs != NULL){ 5170 le_audio_big_t * big = (le_audio_big_t*) hci_stack->le_audio_bigs; 5171 if (big->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5172 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5173 hci_send_cmd(&hci_le_terminate_big, big->big_handle); 5174 return; 5175 } 5176 if (hci_stack->le_audio_big_syncs != NULL){ 5177 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t*) hci_stack->le_audio_big_syncs; 5178 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5179 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5180 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 5181 return; 5182 } 5183 #endif 5184 5185 btstack_run_loop_remove_timer(&hci_stack->timeout); 5186 5187 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5188 log_info("HCI_STATE_HALTING: wait 50 ms"); 5189 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 5190 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5191 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5192 btstack_run_loop_add_timer(&hci_stack->timeout); 5193 break; 5194 5195 case HCI_HALTING_CLOSE: 5196 // close left over connections (that had not been properly closed before) 5197 hci_discard_connections(); 5198 5199 log_info("HCI_STATE_HALTING, calling off"); 5200 5201 // switch mode 5202 hci_power_control_off(); 5203 5204 log_info("HCI_STATE_HALTING, emitting state"); 5205 hci_emit_state(); 5206 log_info("HCI_STATE_HALTING, done"); 5207 break; 5208 5209 case HCI_HALTING_W4_CLOSE_TIMER: 5210 // keep waiting 5211 5212 break; 5213 default: 5214 break; 5215 } 5216 }; 5217 5218 static void hci_falling_asleep_run(void){ 5219 hci_connection_t * connection; 5220 switch(hci_stack->substate) { 5221 case HCI_FALLING_ASLEEP_DISCONNECT: 5222 log_info("HCI_STATE_FALLING_ASLEEP"); 5223 // close all open connections 5224 connection = (hci_connection_t *) hci_stack->connections; 5225 if (connection){ 5226 5227 // send disconnect 5228 if (!hci_can_send_command_packet_now()) return; 5229 5230 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5231 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5232 5233 // send disconnected event right away - causes higher layer connections to get closed, too. 5234 hci_shutdown_connection(connection); 5235 return; 5236 } 5237 5238 if (hci_classic_supported()){ 5239 // disable page and inquiry scan 5240 if (!hci_can_send_command_packet_now()) return; 5241 5242 log_info("HCI_STATE_HALTING, disabling inq scans"); 5243 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5244 5245 // continue in next sub state 5246 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5247 break; 5248 } 5249 5250 /* fall through */ 5251 5252 case HCI_FALLING_ASLEEP_COMPLETE: 5253 log_info("HCI_STATE_HALTING, calling sleep"); 5254 // switch mode 5255 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5256 hci_emit_state(); 5257 break; 5258 5259 default: 5260 break; 5261 } 5262 } 5263 5264 #ifdef ENABLE_CLASSIC 5265 5266 static void hci_update_scan_enable(void){ 5267 // 2 = page scan, 1 = inq scan 5268 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 5269 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 5270 hci_run(); 5271 } 5272 5273 void gap_discoverable_control(uint8_t enable){ 5274 if (enable) enable = 1; // normalize argument 5275 5276 if (hci_stack->discoverable == enable){ 5277 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 5278 return; 5279 } 5280 5281 hci_stack->discoverable = enable; 5282 hci_update_scan_enable(); 5283 } 5284 5285 void gap_connectable_control(uint8_t enable){ 5286 if (enable) enable = 1; // normalize argument 5287 5288 // don't emit event 5289 if (hci_stack->connectable == enable) return; 5290 5291 hci_stack->connectable = enable; 5292 hci_update_scan_enable(); 5293 } 5294 #endif 5295 5296 void gap_local_bd_addr(bd_addr_t address_buffer){ 5297 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 5298 } 5299 5300 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5301 static void hci_host_num_completed_packets(void){ 5302 5303 // create packet manually as arrays are not supported and num_commands should not get reduced 5304 hci_reserve_packet_buffer(); 5305 uint8_t * packet = hci_get_outgoing_packet_buffer(); 5306 5307 uint16_t size = 0; 5308 uint16_t num_handles = 0; 5309 packet[size++] = 0x35; 5310 packet[size++] = 0x0c; 5311 size++; // skip param len 5312 size++; // skip num handles 5313 5314 // add { handle, packets } entries 5315 btstack_linked_item_t * it; 5316 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 5317 hci_connection_t * connection = (hci_connection_t *) it; 5318 if (connection->num_packets_completed){ 5319 little_endian_store_16(packet, size, connection->con_handle); 5320 size += 2; 5321 little_endian_store_16(packet, size, connection->num_packets_completed); 5322 size += 2; 5323 // 5324 num_handles++; 5325 connection->num_packets_completed = 0; 5326 } 5327 } 5328 5329 packet[2] = size - 3; 5330 packet[3] = num_handles; 5331 5332 hci_stack->host_completed_packets = 0; 5333 5334 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5335 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5336 5337 // release packet buffer for synchronous transport implementations 5338 if (hci_transport_synchronous()){ 5339 hci_release_packet_buffer(); 5340 hci_emit_transport_packet_sent(); 5341 } 5342 } 5343 #endif 5344 5345 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 5346 UNUSED(ds); 5347 hci_stack->substate = HCI_HALTING_CLOSE; 5348 // allow packet handlers to defer final shutdown 5349 hci_emit_state(); 5350 hci_run(); 5351 } 5352 5353 static bool hci_run_acl_fragments(void){ 5354 if (hci_stack->acl_fragmentation_total_size > 0u) { 5355 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 5356 hci_connection_t *connection = hci_connection_for_handle(con_handle); 5357 if (connection) { 5358 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 5359 hci_send_acl_packet_fragments(connection); 5360 return true; 5361 } 5362 } else { 5363 // connection gone -> discard further fragments 5364 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 5365 hci_stack->acl_fragmentation_total_size = 0; 5366 hci_stack->acl_fragmentation_pos = 0; 5367 } 5368 } 5369 return false; 5370 } 5371 5372 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5373 static bool hci_run_iso_fragments(void){ 5374 if (hci_stack->iso_fragmentation_total_size > 0u) { 5375 // TODO: flow control 5376 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 5377 hci_send_iso_packet_fragments(); 5378 return true; 5379 } 5380 } 5381 return false; 5382 } 5383 #endif 5384 5385 #ifdef ENABLE_CLASSIC 5386 5387 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5388 static bool hci_classic_operation_active(void) { 5389 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 5390 return true; 5391 } 5392 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 5393 return true; 5394 } 5395 btstack_linked_item_t * it; 5396 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 5397 hci_connection_t *connection = (hci_connection_t *) it; 5398 switch (connection->state) { 5399 case SENT_CREATE_CONNECTION: 5400 case SENT_CANCEL_CONNECTION: 5401 case SENT_DISCONNECT: 5402 return true; 5403 default: 5404 break; 5405 } 5406 } 5407 return false; 5408 } 5409 #endif 5410 5411 static bool hci_run_general_gap_classic(void){ 5412 5413 // assert stack is working and classic is active 5414 if (hci_classic_supported() == false) return false; 5415 if (hci_stack->state != HCI_STATE_WORKING) return false; 5416 5417 // decline incoming connections 5418 if (hci_stack->decline_reason){ 5419 uint8_t reason = hci_stack->decline_reason; 5420 hci_stack->decline_reason = 0; 5421 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 5422 return true; 5423 } 5424 5425 if (hci_stack->gap_tasks_classic != 0){ 5426 hci_run_gap_tasks_classic(); 5427 return true; 5428 } 5429 5430 // start/stop inquiry 5431 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 5432 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5433 if (hci_classic_operation_active() == false) 5434 #endif 5435 { 5436 uint8_t duration = hci_stack->inquiry_state; 5437 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 5438 if (hci_stack->inquiry_max_period_length != 0){ 5439 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); 5440 } else { 5441 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 5442 } 5443 return true; 5444 } 5445 } 5446 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 5447 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5448 hci_send_cmd(&hci_inquiry_cancel); 5449 return true; 5450 } 5451 5452 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 5453 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5454 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 5455 return true; 5456 } 5457 5458 // remote name request 5459 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 5460 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5461 if (hci_classic_operation_active() == false) 5462 #endif 5463 { 5464 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 5465 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 5466 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 5467 return true; 5468 } 5469 } 5470 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5471 // Local OOB data 5472 if (hci_stack->classic_read_local_oob_data){ 5473 hci_stack->classic_read_local_oob_data = false; 5474 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 5475 hci_send_cmd(&hci_read_local_extended_oob_data); 5476 } else { 5477 hci_send_cmd(&hci_read_local_oob_data); 5478 } 5479 } 5480 #endif 5481 // pairing 5482 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 5483 uint8_t state = hci_stack->gap_pairing_state; 5484 uint8_t pin_code[16]; 5485 switch (state){ 5486 case GAP_PAIRING_STATE_SEND_PIN: 5487 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5488 memset(pin_code, 0, 16); 5489 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 5490 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 5491 break; 5492 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 5493 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5494 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 5495 break; 5496 case GAP_PAIRING_STATE_SEND_PASSKEY: 5497 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5498 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 5499 break; 5500 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5501 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5502 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5503 break; 5504 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5505 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5506 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5507 break; 5508 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5509 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5510 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5511 break; 5512 default: 5513 break; 5514 } 5515 return true; 5516 } 5517 return false; 5518 } 5519 #endif 5520 5521 #ifdef ENABLE_BLE 5522 5523 #ifdef ENABLE_LE_CENTRAL 5524 static void hci_le_scan_stop(void){ 5525 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5526 if (hci_extended_advertising_supported()) { 5527 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5528 } else 5529 #endif 5530 { 5531 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5532 } 5533 } 5534 #endif 5535 5536 #ifdef ENABLE_LE_PERIPHERAL 5537 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5538 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5539 uint8_t operation = 0; 5540 if (pos == 0){ 5541 // first fragment or complete data 5542 operation |= 1; 5543 } 5544 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5545 // last fragment or complete data 5546 operation |= 2; 5547 } 5548 return operation; 5549 } 5550 #endif 5551 #endif 5552 5553 static bool hci_run_general_gap_le(void){ 5554 5555 btstack_linked_list_iterator_t lit; 5556 5557 // Phase 1: collect what to stop 5558 5559 #ifdef ENABLE_LE_CENTRAL 5560 bool scanning_stop = false; 5561 bool connecting_stop = false; 5562 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5563 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5564 bool periodic_sync_stop = false; 5565 #endif 5566 #endif 5567 #endif 5568 5569 #ifdef ENABLE_LE_PERIPHERAL 5570 bool advertising_stop = false; 5571 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5572 le_advertising_set_t * advertising_stop_set = NULL; 5573 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5574 bool periodic_advertising_stop = false; 5575 #endif 5576 #endif 5577 #endif 5578 5579 // check if own address changes 5580 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5581 5582 // check if whitelist needs modification 5583 bool whitelist_modification_pending = false; 5584 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5585 while (btstack_linked_list_iterator_has_next(&lit)){ 5586 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5587 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5588 whitelist_modification_pending = true; 5589 break; 5590 } 5591 } 5592 5593 // check if resolving list needs modification 5594 bool resolving_list_modification_pending = false; 5595 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5596 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5597 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5598 resolving_list_modification_pending = true; 5599 } 5600 #endif 5601 5602 #ifdef ENABLE_LE_CENTRAL 5603 5604 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5605 // check if periodic advertiser list needs modification 5606 bool periodic_list_modification_pending = false; 5607 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5608 while (btstack_linked_list_iterator_has_next(&lit)){ 5609 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5610 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5611 periodic_list_modification_pending = true; 5612 break; 5613 } 5614 } 5615 #endif 5616 5617 // scanning control 5618 if (hci_stack->le_scanning_active) { 5619 // stop if: 5620 // - parameter change required 5621 // - it's disabled 5622 // - whitelist change required but used for scanning 5623 // - resolving list modified 5624 // - own address changes 5625 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5626 if ((hci_stack->le_scanning_param_update) || 5627 !hci_stack->le_scanning_enabled || 5628 (scanning_uses_whitelist && whitelist_modification_pending) || 5629 resolving_list_modification_pending || 5630 random_address_change){ 5631 5632 scanning_stop = true; 5633 } 5634 } 5635 5636 // connecting control 5637 bool connecting_with_whitelist; 5638 switch (hci_stack->le_connecting_state){ 5639 case LE_CONNECTING_DIRECT: 5640 case LE_CONNECTING_WHITELIST: 5641 // stop connecting if: 5642 // - connecting uses white and whitelist modification pending 5643 // - if it got disabled 5644 // - resolving list modified 5645 // - own address changes 5646 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5647 if ((connecting_with_whitelist && whitelist_modification_pending) || 5648 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5649 resolving_list_modification_pending || 5650 random_address_change) { 5651 5652 connecting_stop = true; 5653 } 5654 break; 5655 default: 5656 break; 5657 } 5658 5659 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5660 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5661 // periodic sync control 5662 bool sync_with_advertiser_list; 5663 switch(hci_stack->le_periodic_sync_state){ 5664 case LE_CONNECTING_DIRECT: 5665 case LE_CONNECTING_WHITELIST: 5666 // stop sync if: 5667 // - sync with advertiser list and advertiser list modification pending 5668 // - if it got disabled 5669 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5670 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5671 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5672 periodic_sync_stop = true; 5673 } 5674 break; 5675 default: 5676 break; 5677 } 5678 #endif 5679 #endif 5680 5681 #endif /* ENABLE_LE_CENTRAL */ 5682 5683 #ifdef ENABLE_LE_PERIPHERAL 5684 // le advertisement control 5685 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5686 // stop if: 5687 // - parameter change required 5688 // - random address used in advertising and changes 5689 // - it's disabled 5690 // - whitelist change required but used for advertisement filter policy 5691 // - resolving list modified 5692 // - own address changes 5693 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5694 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5695 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5696 if (advertising_change || 5697 (advertising_uses_random_address && random_address_change) || 5698 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5699 (advertising_uses_whitelist && whitelist_modification_pending) || 5700 resolving_list_modification_pending || 5701 random_address_change) { 5702 5703 advertising_stop = true; 5704 } 5705 } 5706 5707 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5708 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5709 btstack_linked_list_iterator_t it; 5710 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5711 while (btstack_linked_list_iterator_has_next(&it)){ 5712 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5713 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5714 // stop if: 5715 // - parameter change required 5716 // - random address used in connectable advertising and changes 5717 // - it's disabled 5718 // - whitelist change required but used for advertisement filter policy 5719 // - resolving list modified 5720 // - own address changes 5721 // - advertisement set will be removed 5722 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5723 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5724 bool advertising_uses_random_address = 5725 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5726 advertising_connectable; 5727 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5728 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5729 bool advertising_set_random_address_change = 5730 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5731 bool advertising_set_will_be_removed = 5732 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5733 if (advertising_parameter_change || 5734 (advertising_uses_random_address && advertising_set_random_address_change) || 5735 (advertising_enabled == false) || 5736 (advertising_uses_whitelist && whitelist_modification_pending) || 5737 resolving_list_modification_pending || 5738 advertising_set_will_be_removed) { 5739 5740 advertising_stop = true; 5741 advertising_stop_set = advertising_set; 5742 break; 5743 } 5744 } 5745 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5746 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5747 // stop if: 5748 // - it's disabled 5749 // - parameter change required 5750 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5751 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5752 if ((periodic_enabled == false) || periodic_parameter_change){ 5753 periodic_advertising_stop = true; 5754 advertising_stop_set = advertising_set; 5755 } 5756 } 5757 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5758 } 5759 } 5760 #endif 5761 5762 #endif 5763 5764 5765 // Phase 2: stop everything that should be off during modifications 5766 5767 5768 // 2.1 Outgoing connection 5769 #ifdef ENABLE_LE_CENTRAL 5770 if (connecting_stop){ 5771 hci_send_cmd(&hci_le_create_connection_cancel); 5772 return true; 5773 } 5774 #endif 5775 5776 // 2.2 Scanning 5777 #ifdef ENABLE_LE_CENTRAL 5778 if (scanning_stop){ 5779 hci_stack->le_scanning_active = false; 5780 hci_le_scan_stop(); 5781 return true; 5782 } 5783 5784 // 2.3 Periodic Sync 5785 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5786 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5787 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5788 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5789 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5790 return true; 5791 } 5792 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5793 if (periodic_sync_stop){ 5794 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5795 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5796 return true; 5797 } 5798 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5799 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5800 #endif /* ENABLE_LE_CENTRAL */ 5801 5802 // 2.4 Advertising: legacy, extended, periodic 5803 #ifdef ENABLE_LE_PERIPHERAL 5804 if (advertising_stop){ 5805 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5806 if (hci_extended_advertising_supported()) { 5807 uint8_t advertising_stop_handle; 5808 if (advertising_stop_set != NULL){ 5809 advertising_stop_handle = advertising_stop_set->advertising_handle; 5810 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5811 } else { 5812 advertising_stop_handle = 0; 5813 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5814 } 5815 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5816 const uint16_t durations[] = { 0 }; 5817 const uint16_t max_events[] = { 0 }; 5818 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5819 } else 5820 #endif 5821 { 5822 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5823 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5824 } 5825 return true; 5826 } 5827 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5828 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5829 if (periodic_advertising_stop){ 5830 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5831 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5832 return true; 5833 } 5834 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5835 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5836 #endif /* ENABLE_LE_PERIPHERAL */ 5837 5838 5839 // Phase 3: modify 5840 5841 if (random_address_change){ 5842 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5843 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5844 if (hci_extended_advertising_supported()) { 5845 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5846 } 5847 #endif 5848 { 5849 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5850 } 5851 return true; 5852 } 5853 5854 #ifdef ENABLE_LE_CENTRAL 5855 if (hci_stack->le_scanning_param_update){ 5856 hci_stack->le_scanning_param_update = false; 5857 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5858 if (hci_extended_advertising_supported()){ 5859 // prepare arrays for all PHYs 5860 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5861 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5862 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5863 uint8_t scanning_phys = 1; // LE 1M PHY 5864 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5865 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5866 } else 5867 #endif 5868 { 5869 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5870 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5871 } 5872 return true; 5873 } 5874 #endif 5875 5876 #ifdef ENABLE_LE_PERIPHERAL 5877 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5878 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5879 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5880 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5881 if (hci_extended_advertising_supported()){ 5882 // map advertisment type to advertising event properties 5883 uint16_t adv_event_properties = 0; 5884 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5885 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5886 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5887 } 5888 hci_stack->le_advertising_set_in_current_command = 0; 5889 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5890 0, 5891 adv_event_properties, 5892 hci_stack->le_advertisements_interval_min, 5893 hci_stack->le_advertisements_interval_max, 5894 hci_stack->le_advertisements_channel_map, 5895 hci_stack->le_advertisements_own_addr_type, 5896 hci_stack->le_advertisements_direct_address_type, 5897 hci_stack->le_advertisements_direct_address, 5898 hci_stack->le_advertisements_filter_policy, 5899 0x7f, // tx power: no preference 5900 0x01, // primary adv phy: LE 1M 5901 0, // secondary adv max skip 5902 0, // secondary adv phy 5903 0, // adv sid 5904 0 // scan request notification 5905 ); 5906 } 5907 #endif 5908 { 5909 hci_send_cmd(&hci_le_set_advertising_parameters, 5910 hci_stack->le_advertisements_interval_min, 5911 hci_stack->le_advertisements_interval_max, 5912 hci_stack->le_advertisements_type, 5913 hci_stack->le_advertisements_own_addr_type, 5914 hci_stack->le_advertisements_direct_address_type, 5915 hci_stack->le_advertisements_direct_address, 5916 hci_stack->le_advertisements_channel_map, 5917 hci_stack->le_advertisements_filter_policy); 5918 } 5919 return true; 5920 } 5921 5922 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5923 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5924 uint8_t adv_data_clean[31]; 5925 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5926 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5927 hci_stack->le_advertisements_data_len); 5928 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5929 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5930 if (hci_extended_advertising_supported()){ 5931 hci_stack->le_advertising_set_in_current_command = 0; 5932 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5933 } else 5934 #endif 5935 { 5936 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5937 } 5938 return true; 5939 } 5940 5941 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5942 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5943 uint8_t scan_data_clean[31]; 5944 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5945 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5946 hci_stack->le_scan_response_data_len); 5947 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5948 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5949 if (hci_extended_advertising_supported()){ 5950 hci_stack->le_advertising_set_in_current_command = 0; 5951 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5952 } else 5953 #endif 5954 { 5955 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5956 } 5957 return true; 5958 } 5959 5960 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5961 if (hci_extended_advertising_supported()) { 5962 btstack_linked_list_iterator_t it; 5963 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5964 while (btstack_linked_list_iterator_has_next(&it)){ 5965 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5966 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5967 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5968 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5969 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5970 return true; 5971 } 5972 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5973 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5974 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5975 return true; 5976 } 5977 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5978 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5979 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5980 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5981 advertising_set->advertising_handle, 5982 advertising_set->extended_params.advertising_event_properties, 5983 advertising_set->extended_params.primary_advertising_interval_min, 5984 advertising_set->extended_params.primary_advertising_interval_max, 5985 advertising_set->extended_params.primary_advertising_channel_map, 5986 advertising_set->extended_params.own_address_type, 5987 advertising_set->extended_params.peer_address_type, 5988 advertising_set->extended_params.peer_address, 5989 advertising_set->extended_params.advertising_filter_policy, 5990 advertising_set->extended_params.advertising_tx_power, 5991 advertising_set->extended_params.primary_advertising_phy, 5992 advertising_set->extended_params.secondary_advertising_max_skip, 5993 advertising_set->extended_params.secondary_advertising_phy, 5994 advertising_set->extended_params.advertising_sid, 5995 advertising_set->extended_params.scan_request_notification_enable 5996 ); 5997 return true; 5998 } 5999 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 6000 uint16_t pos = advertising_set->adv_data_pos; 6001 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 6002 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6003 if ((operation & 0x02) != 0){ 6004 // last fragment or complete data 6005 operation |= 2; 6006 advertising_set->adv_data_pos = 0; 6007 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6008 } else { 6009 advertising_set->adv_data_pos += data_to_upload; 6010 } 6011 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6012 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 6013 return true; 6014 } 6015 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 6016 uint16_t pos = advertising_set->scan_data_pos; 6017 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 6018 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6019 if ((operation & 0x02) != 0){ 6020 advertising_set->scan_data_pos = 0; 6021 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6022 } else { 6023 advertising_set->scan_data_pos += data_to_upload; 6024 } 6025 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6026 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 6027 return true; 6028 } 6029 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6030 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 6031 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6032 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6033 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 6034 advertising_set->advertising_handle, 6035 advertising_set->periodic_params.periodic_advertising_interval_min, 6036 advertising_set->periodic_params.periodic_advertising_interval_max, 6037 advertising_set->periodic_params.periodic_advertising_properties); 6038 return true; 6039 } 6040 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 6041 uint16_t pos = advertising_set->periodic_data_pos; 6042 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 6043 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6044 if ((operation & 0x02) != 0){ 6045 // last fragment or complete data 6046 operation |= 2; 6047 advertising_set->periodic_data_pos = 0; 6048 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6049 } else { 6050 advertising_set->periodic_data_pos += data_to_upload; 6051 } 6052 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6053 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 6054 return true; 6055 } 6056 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6057 } 6058 } 6059 #endif 6060 6061 #endif 6062 6063 #ifdef ENABLE_LE_CENTRAL 6064 // if connect with whitelist was active and is not cancelled yet, wait until next time 6065 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 6066 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6067 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 6068 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 6069 #endif 6070 #endif 6071 6072 // LE Whitelist Management 6073 if (whitelist_modification_pending){ 6074 // add/remove entries 6075 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6076 while (btstack_linked_list_iterator_has_next(&lit)){ 6077 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6078 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 6079 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6080 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 6081 return true; 6082 } 6083 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 6084 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 6085 entry->state |= LE_WHITELIST_ON_CONTROLLER; 6086 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 6087 return true; 6088 } 6089 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 6090 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6091 btstack_memory_whitelist_entry_free(entry); 6092 } 6093 } 6094 } 6095 6096 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6097 // LE Resolving List Management 6098 if (resolving_list_supported) { 6099 uint16_t i; 6100 switch (hci_stack->le_resolving_list_state) { 6101 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 6102 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6103 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 6104 return true; 6105 case LE_RESOLVING_LIST_READ_SIZE: 6106 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 6107 hci_send_cmd(&hci_le_read_resolving_list_size); 6108 return true; 6109 case LE_RESOLVING_LIST_SEND_CLEAR: 6110 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6111 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 6112 sizeof(hci_stack->le_resolving_list_add_entries)); 6113 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 6114 sizeof(hci_stack->le_resolving_list_remove_entries)); 6115 hci_send_cmd(&hci_le_clear_resolving_list); 6116 return true; 6117 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 6118 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6119 uint8_t offset = i >> 3; 6120 uint8_t mask = 1 << (i & 7); 6121 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 6122 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 6123 bd_addr_t peer_identity_addreses; 6124 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6125 sm_key_t peer_irk; 6126 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6127 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6128 6129 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 6130 // trigger whitelist entry 'update' (work around for controller bug) 6131 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6132 while (btstack_linked_list_iterator_has_next(&lit)) { 6133 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 6134 if (entry->address_type != peer_identity_addr_type) continue; 6135 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 6136 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 6137 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 6138 } 6139 #endif 6140 6141 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 6142 peer_identity_addreses); 6143 return true; 6144 } 6145 6146 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 6147 6148 /* fall through */ 6149 6150 case LE_RESOLVING_LIST_ADD_ENTRIES: 6151 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6152 uint8_t offset = i >> 3; 6153 uint8_t mask = 1 << (i & 7); 6154 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 6155 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 6156 bd_addr_t peer_identity_addreses; 6157 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6158 sm_key_t peer_irk; 6159 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6160 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6161 if (btstack_is_null(peer_irk, 16)) continue; 6162 const uint8_t *local_irk = gap_get_persistent_irk(); 6163 // command uses format specifier 'P' that stores 16-byte value without flip 6164 uint8_t local_irk_flipped[16]; 6165 uint8_t peer_irk_flipped[16]; 6166 reverse_128(local_irk, local_irk_flipped); 6167 reverse_128(peer_irk, peer_irk_flipped); 6168 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 6169 peer_irk_flipped, local_irk_flipped); 6170 return true; 6171 } 6172 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6173 break; 6174 6175 default: 6176 break; 6177 } 6178 } 6179 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6180 #endif 6181 6182 #ifdef ENABLE_LE_CENTRAL 6183 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6184 // LE Whitelist Management 6185 if (periodic_list_modification_pending){ 6186 // add/remove entries 6187 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 6188 while (btstack_linked_list_iterator_has_next(&lit)){ 6189 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 6190 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 6191 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 6192 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 6193 return true; 6194 } 6195 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 6196 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 6197 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 6198 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address, entry->sid); 6199 return true; 6200 } 6201 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 6202 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 6203 btstack_memory_periodic_advertiser_list_entry_free(entry); 6204 } 6205 } 6206 } 6207 #endif 6208 #endif 6209 6210 #ifdef ENABLE_LE_CENTRAL 6211 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6212 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6213 if (hci_stack->le_past_set_default_params){ 6214 hci_stack->le_past_set_default_params = false; 6215 hci_send_cmd(&hci_le_set_default_periodic_advertising_sync_transfer_parameters, 6216 hci_stack->le_past_mode, 6217 hci_stack->le_past_skip, 6218 hci_stack->le_past_sync_timeout, 6219 hci_stack->le_past_cte_type); 6220 return true; 6221 } 6222 #endif 6223 #endif 6224 #endif 6225 6226 // post-pone all actions until stack is fully working 6227 if (hci_stack->state != HCI_STATE_WORKING) return false; 6228 6229 // advertisements, active scanning, and creating connections requires random address to be set if using private address 6230 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 6231 6232 // Phase 4: restore state 6233 6234 #ifdef ENABLE_LE_CENTRAL 6235 // re-start scanning 6236 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 6237 hci_stack->le_scanning_active = true; 6238 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6239 if (hci_extended_advertising_supported()){ 6240 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, hci_stack->le_scan_filter_duplicates, 0, 0); 6241 } else 6242 #endif 6243 { 6244 hci_send_cmd(&hci_le_set_scan_enable, 1, hci_stack->le_scan_filter_duplicates); 6245 } 6246 return true; 6247 } 6248 #endif 6249 6250 #ifdef ENABLE_LE_CENTRAL 6251 // re-start connecting 6252 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 6253 bd_addr_t null_addr; 6254 memset(null_addr, 0, 6); 6255 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6256 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6257 hci_send_cmd(&hci_le_create_connection, 6258 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 6259 hci_stack->le_connection_scan_window, // scan interval: 30 ms 6260 1, // use whitelist 6261 0, // peer address type 6262 null_addr, // peer bd addr 6263 hci_stack->le_connection_own_addr_type, // our addr type: 6264 hci_stack->le_connection_interval_min, // conn interval min 6265 hci_stack->le_connection_interval_max, // conn interval max 6266 hci_stack->le_connection_latency, // conn latency 6267 hci_stack->le_supervision_timeout, // conn latency 6268 hci_stack->le_minimum_ce_length, // min ce length 6269 hci_stack->le_maximum_ce_length // max ce length 6270 ); 6271 return true; 6272 } 6273 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6274 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 6275 switch(hci_stack->le_periodic_sync_request){ 6276 case LE_CONNECTING_DIRECT: 6277 case LE_CONNECTING_WHITELIST: 6278 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 6279 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 6280 hci_stack->le_periodic_sync_options, 6281 hci_stack->le_periodic_sync_advertising_sid, 6282 hci_stack->le_periodic_sync_advertiser_address_type, 6283 hci_stack->le_periodic_sync_advertiser_address, 6284 hci_stack->le_periodic_sync_skip, 6285 hci_stack->le_periodic_sync_timeout, 6286 hci_stack->le_periodic_sync_cte_type); 6287 return true; 6288 default: 6289 break; 6290 } 6291 } 6292 #endif 6293 #endif 6294 6295 #ifdef ENABLE_LE_PERIPHERAL 6296 // re-start advertising 6297 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6298 // check if advertisements should be enabled given 6299 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6300 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 6301 6302 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6303 if (hci_extended_advertising_supported()){ 6304 const uint8_t advertising_handles[] = { 0 }; 6305 const uint16_t durations[] = { 0 }; 6306 const uint16_t max_events[] = { 0 }; 6307 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6308 } else 6309 #endif 6310 { 6311 hci_send_cmd(&hci_le_set_advertise_enable, 1); 6312 } 6313 return true; 6314 } 6315 6316 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6317 if (hci_extended_advertising_supported()) { 6318 btstack_linked_list_iterator_t it; 6319 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6320 while (btstack_linked_list_iterator_has_next(&it)) { 6321 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6322 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6323 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6324 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 6325 const uint16_t durations[] = { advertising_set->enable_timeout }; 6326 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 6327 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6328 return true; 6329 } 6330 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6331 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 6332 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 6333 uint8_t enable = 1; 6334 if (advertising_set->periodic_include_adi){ 6335 enable |= 2; 6336 } 6337 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 6338 return true; 6339 } 6340 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6341 } 6342 } 6343 #endif 6344 #endif 6345 6346 return false; 6347 } 6348 6349 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6350 static bool hci_run_iso_tasks(void){ 6351 btstack_linked_list_iterator_t it; 6352 6353 if (hci_stack->iso_active_operation_type != HCI_ISO_TYPE_INVALID) { 6354 return false; 6355 } 6356 6357 // BIG 6358 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 6359 while (btstack_linked_list_iterator_has_next(&it)){ 6360 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 6361 switch (big->state){ 6362 case LE_AUDIO_BIG_STATE_CREATE: 6363 hci_stack->iso_active_operation_group_id = big->params->big_handle; 6364 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6365 big->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6366 hci_send_cmd(&hci_le_create_big, 6367 big->params->big_handle, 6368 big->params->advertising_handle, 6369 big->params->num_bis, 6370 big->params->sdu_interval_us, 6371 big->params->max_sdu, 6372 big->params->max_transport_latency_ms, 6373 big->params->rtn, 6374 big->params->phy, 6375 big->params->packing, 6376 big->params->framing, 6377 big->params->encryption, 6378 big->params->broadcast_code); 6379 return true; 6380 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6381 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6382 hci_send_cmd(&hci_le_setup_iso_data_path, big->bis_con_handles[big->state_vars.next_bis], 0, 0, 0, 0, 0, 0, 0, NULL); 6383 return true; 6384 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6385 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6386 hci_send_cmd(&hci_le_terminate_big, big->big_handle, big->state_vars.status); 6387 return true; 6388 case LE_AUDIO_BIG_STATE_TERMINATE: 6389 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6390 hci_send_cmd(&hci_le_terminate_big, big->big_handle, ERROR_CODE_SUCCESS); 6391 return true; 6392 default: 6393 break; 6394 } 6395 } 6396 6397 // BIG Sync 6398 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 6399 while (btstack_linked_list_iterator_has_next(&it)){ 6400 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 6401 switch (big_sync->state){ 6402 case LE_AUDIO_BIG_STATE_CREATE: 6403 hci_stack->iso_active_operation_group_id = big_sync->params->big_handle; 6404 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6405 big_sync->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6406 hci_send_cmd(&hci_le_big_create_sync, 6407 big_sync->params->big_handle, 6408 big_sync->params->sync_handle, 6409 big_sync->params->encryption, 6410 big_sync->params->broadcast_code, 6411 big_sync->params->mse, 6412 big_sync->params->big_sync_timeout_10ms, 6413 big_sync->params->num_bis, 6414 big_sync->params->bis_indices); 6415 return true; 6416 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6417 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6418 hci_send_cmd(&hci_le_setup_iso_data_path, big_sync->bis_con_handles[big_sync->state_vars.next_bis], 1, 0, 0, 0, 0, 0, 0, NULL); 6419 return true; 6420 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6421 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6422 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6423 return true; 6424 case LE_AUDIO_BIG_STATE_TERMINATE: 6425 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6426 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6427 return true; 6428 default: 6429 break; 6430 } 6431 } 6432 6433 // CIG 6434 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_cigs); 6435 while (btstack_linked_list_iterator_has_next(&it)) { 6436 le_audio_cig_t *cig = (le_audio_cig_t *) btstack_linked_list_iterator_next(&it); 6437 uint8_t i; 6438 // Set CIG Parameters 6439 uint8_t cis_id[MAX_NR_CIS]; 6440 uint16_t max_sdu_c_to_p[MAX_NR_CIS]; 6441 uint16_t max_sdu_p_to_c[MAX_NR_CIS]; 6442 uint8_t phy_c_to_p[MAX_NR_CIS]; 6443 uint8_t phy_p_to_c[MAX_NR_CIS]; 6444 uint8_t rtn_c_to_p[MAX_NR_CIS]; 6445 uint8_t rtn_p_to_c[MAX_NR_CIS]; 6446 switch (cig->state) { 6447 case LE_AUDIO_CIG_STATE_CREATE: 6448 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6449 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6450 cig->state = LE_AUDIO_CIG_STATE_W4_ESTABLISHED; 6451 le_audio_cig_params_t * params = cig->params; 6452 for (i = 0; i < params->num_cis; i++) { 6453 le_audio_cis_params_t * cis_params = &cig->params->cis_params[i]; 6454 cis_id[i] = cis_params->cis_id; 6455 max_sdu_c_to_p[i] = cis_params->max_sdu_c_to_p; 6456 max_sdu_p_to_c[i] = cis_params->max_sdu_p_to_c; 6457 phy_c_to_p[i] = cis_params->phy_c_to_p; 6458 phy_p_to_c[i] = cis_params->phy_p_to_c; 6459 rtn_c_to_p[i] = cis_params->rtn_c_to_p; 6460 rtn_p_to_c[i] = cis_params->rtn_p_to_c; 6461 } 6462 hci_send_cmd(&hci_le_set_cig_parameters, 6463 cig->cig_id, 6464 params->sdu_interval_c_to_p, 6465 params->sdu_interval_p_to_c, 6466 params->worst_case_sca, 6467 params->packing, 6468 params->framing, 6469 params->max_transport_latency_c_to_p, 6470 params->max_transport_latency_p_to_c, 6471 params->num_cis, 6472 cis_id, 6473 max_sdu_c_to_p, 6474 max_sdu_p_to_c, 6475 phy_c_to_p, 6476 phy_p_to_c, 6477 rtn_c_to_p, 6478 rtn_p_to_c 6479 ); 6480 return true; 6481 case LE_AUDIO_CIG_STATE_CREATE_CIS: 6482 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6483 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6484 cig->state = LE_AUDIO_CIG_STATE_W4_CREATE_CIS; 6485 for (i=0;i<cig->num_cis;i++){ 6486 cig->cis_setup_active[i] = true; 6487 } 6488 hci_send_cmd(&hci_le_create_cis, cig->num_cis, cig->cis_con_handles, cig->acl_con_handles); 6489 return true; 6490 case LE_AUDIO_CIG_STATE_SETUP_ISO_PATH: 6491 while (cig->state_vars.next_cis < (cig->num_cis * 2)){ 6492 // find next path to setup 6493 uint8_t cis_index = cig->state_vars.next_cis >> 1; 6494 if (cig->cis_established[cis_index] == false) { 6495 continue; 6496 } 6497 uint8_t cis_direction = cig->state_vars.next_cis & 1; 6498 bool setup = true; 6499 if (cis_direction == 0){ 6500 // 0 - input - host to controller 6501 // we are central => central to peripheral 6502 setup &= cig->params->cis_params[cis_index].max_sdu_c_to_p > 0; 6503 } else { 6504 // 1 - output - controller to host 6505 // we are central => peripheral to central 6506 setup &= cig->params->cis_params[cis_index].max_sdu_p_to_c > 0; 6507 } 6508 if (setup){ 6509 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6510 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6511 cig->state = LE_AUDIO_CIG_STATE_W4_SETUP_ISO_PATH; 6512 hci_send_cmd(&hci_le_setup_iso_data_path, cig->cis_con_handles[cis_index], cis_direction, 0, 0, 0, 0, 0, 0, NULL); 6513 return true; 6514 } 6515 cig->state_vars.next_cis++; 6516 } 6517 // emit done 6518 cig->state = LE_AUDIO_CIG_STATE_ACTIVE; 6519 default: 6520 break; 6521 } 6522 } 6523 6524 // CIS Accept/Reject 6525 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 6526 while (btstack_linked_list_iterator_has_next(&it)) { 6527 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 6528 hci_con_handle_t con_handle; 6529 switch (iso_stream->state){ 6530 case HCI_ISO_STREAM_W2_ACCEPT: 6531 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 6532 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6533 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6534 hci_send_cmd(&hci_le_accept_cis_request, iso_stream->con_handle); 6535 return true; 6536 case HCI_ISO_STREAM_W2_REJECT: 6537 con_handle = iso_stream->con_handle; 6538 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6539 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6540 hci_iso_stream_finalize(iso_stream); 6541 hci_send_cmd(&hci_le_reject_cis_request, con_handle, ERROR_CODE_REMOTE_DEVICE_TERMINATED_CONNECTION_DUE_TO_LOW_RESOURCES); 6542 return true; 6543 case HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT: 6544 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6545 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6546 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ISO_SETUP_INPUT; 6547 hci_send_cmd(&hci_le_setup_iso_data_path, iso_stream->con_handle, 0, 0, 0, 0, 0, 0, 0, NULL); 6548 break; 6549 case HCI_ISO_STREAM_STATE_W2_SETUP_ISO_OUTPUT: 6550 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6551 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6552 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ISO_SETUP_OUTPUT; 6553 hci_send_cmd(&hci_le_setup_iso_data_path, iso_stream->con_handle, 1, 0, 0, 0, 0, 0, 0, NULL); 6554 break; 6555 default: 6556 break; 6557 } 6558 } 6559 6560 return false; 6561 } 6562 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6563 #endif 6564 6565 static bool hci_run_general_pending_commands(void){ 6566 btstack_linked_item_t * it; 6567 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6568 hci_connection_t * connection = (hci_connection_t *) it; 6569 6570 switch(connection->state){ 6571 case SEND_CREATE_CONNECTION: 6572 switch(connection->address_type){ 6573 #ifdef ENABLE_CLASSIC 6574 case BD_ADDR_TYPE_ACL: 6575 log_info("sending hci_create_connection"); 6576 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 6577 break; 6578 #endif 6579 default: 6580 #ifdef ENABLE_BLE 6581 #ifdef ENABLE_LE_CENTRAL 6582 log_info("sending hci_le_create_connection"); 6583 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6584 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6585 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6586 if (hci_extended_advertising_supported()) { 6587 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 6588 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 6589 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 6590 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 6591 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 6592 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 6593 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 6594 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 6595 hci_send_cmd(&hci_le_extended_create_connection, 6596 0, // don't use whitelist 6597 hci_stack->le_connection_own_addr_type, // our addr type: 6598 connection->address_type, // peer address type 6599 connection->address, // peer bd addr 6600 1, // initiating PHY - 1M 6601 le_connection_scan_interval, // conn scan interval 6602 le_connection_scan_window, // conn scan windows 6603 le_connection_interval_min, // conn interval min 6604 le_connection_interval_max, // conn interval max 6605 le_connection_latency, // conn latency 6606 le_supervision_timeout, // conn latency 6607 le_minimum_ce_length, // min ce length 6608 le_maximum_ce_length // max ce length 6609 ); } 6610 else 6611 #endif 6612 { 6613 hci_send_cmd(&hci_le_create_connection, 6614 hci_stack->le_connection_scan_interval, // conn scan interval 6615 hci_stack->le_connection_scan_window, // conn scan windows 6616 0, // don't use whitelist 6617 connection->address_type, // peer address type 6618 connection->address, // peer bd addr 6619 hci_stack->le_connection_own_addr_type, // our addr type: 6620 hci_stack->le_connection_interval_min, // conn interval min 6621 hci_stack->le_connection_interval_max, // conn interval max 6622 hci_stack->le_connection_latency, // conn latency 6623 hci_stack->le_supervision_timeout, // conn latency 6624 hci_stack->le_minimum_ce_length, // min ce length 6625 hci_stack->le_maximum_ce_length // max ce length 6626 ); 6627 } 6628 connection->state = SENT_CREATE_CONNECTION; 6629 #endif 6630 #endif 6631 break; 6632 } 6633 return true; 6634 6635 #ifdef ENABLE_CLASSIC 6636 case RECEIVED_CONNECTION_REQUEST: 6637 connection->role = HCI_ROLE_SLAVE; 6638 if (connection->address_type == BD_ADDR_TYPE_ACL){ 6639 log_info("sending hci_accept_connection_request"); 6640 connection->state = ACCEPTED_CONNECTION_REQUEST; 6641 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 6642 return true; 6643 } 6644 break; 6645 #endif 6646 case SEND_DISCONNECT: 6647 connection->state = SENT_DISCONNECT; 6648 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6649 return true; 6650 6651 default: 6652 break; 6653 } 6654 6655 // no further commands if connection is about to get shut down 6656 if (connection->state == SENT_DISCONNECT) continue; 6657 6658 #ifdef ENABLE_CLASSIC 6659 6660 // Handling link key request requires remote supported features 6661 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 6662 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 6663 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6664 6665 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 6666 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 6667 if (have_link_key && security_level_sufficient){ 6668 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 6669 } else { 6670 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 6671 } 6672 return true; 6673 } 6674 6675 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 6676 log_info("denying to pin request"); 6677 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 6678 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 6679 return true; 6680 } 6681 6682 // security assessment requires remote features 6683 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 6684 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 6685 hci_ssp_assess_security_on_io_cap_request(connection); 6686 // 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 6687 } 6688 6689 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 6690 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6691 // set authentication requirements: 6692 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 6693 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 6694 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 6695 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 6696 authreq |= 1; 6697 } 6698 bool bonding = hci_stack->bondable; 6699 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 6700 // if we have received IO Cap Response, we're in responder role 6701 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6702 if (bonding && !remote_bonding){ 6703 log_info("Remote not bonding, dropping local flag"); 6704 bonding = false; 6705 } 6706 } 6707 if (bonding){ 6708 if (connection->bonding_flags & BONDING_DEDICATED){ 6709 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6710 } else { 6711 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 6712 } 6713 } 6714 uint8_t have_oob_data = 0; 6715 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6716 if (connection->classic_oob_c_192 != NULL){ 6717 have_oob_data |= 1; 6718 } 6719 if (connection->classic_oob_c_256 != NULL){ 6720 have_oob_data |= 2; 6721 } 6722 #endif 6723 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 6724 return true; 6725 } 6726 6727 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 6728 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6729 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 6730 return true; 6731 } 6732 6733 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6734 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6735 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6736 const uint8_t zero[16] = { 0 }; 6737 const uint8_t * r_192 = zero; 6738 const uint8_t * c_192 = zero; 6739 const uint8_t * r_256 = zero; 6740 const uint8_t * c_256 = zero; 6741 // verify P-256 OOB 6742 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6743 c_256 = connection->classic_oob_c_256; 6744 if (connection->classic_oob_r_256 != NULL) { 6745 r_256 = connection->classic_oob_r_256; 6746 } 6747 } 6748 // verify P-192 OOB 6749 if ((connection->classic_oob_c_192 != NULL)) { 6750 c_192 = connection->classic_oob_c_192; 6751 if (connection->classic_oob_r_192 != NULL) { 6752 r_192 = connection->classic_oob_r_192; 6753 } 6754 } 6755 6756 // assess security 6757 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6758 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6759 if (need_level_4 && !can_reach_level_4){ 6760 log_info("Level 4 required, but not possible -> abort"); 6761 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6762 // send oob negative reply 6763 c_256 = NULL; 6764 c_192 = NULL; 6765 } 6766 6767 // Reply 6768 if (c_256 != zero) { 6769 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6770 } else if (c_192 != zero){ 6771 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6772 } else { 6773 hci_stack->classic_oob_con_handle = connection->con_handle; 6774 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6775 } 6776 return true; 6777 } 6778 #endif 6779 6780 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6781 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6782 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6783 return true; 6784 } 6785 6786 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6787 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6788 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6789 return true; 6790 } 6791 6792 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6793 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6794 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6795 return true; 6796 } 6797 6798 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6799 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6800 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6801 connection->state = SENT_DISCONNECT; 6802 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6803 return true; 6804 } 6805 6806 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6807 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6808 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6809 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6810 return true; 6811 } 6812 6813 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6814 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6815 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6816 return true; 6817 } 6818 6819 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6820 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6821 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6822 return true; 6823 } 6824 6825 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6826 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6827 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6828 return true; 6829 } 6830 6831 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6832 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6833 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6834 return true; 6835 } 6836 6837 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6838 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6839 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6840 return true; 6841 } 6842 #endif 6843 6844 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6845 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6846 #ifdef ENABLE_CLASSIC 6847 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6848 #endif 6849 if (connection->state != SENT_DISCONNECT){ 6850 connection->state = SENT_DISCONNECT; 6851 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6852 return true; 6853 } 6854 } 6855 6856 #ifdef ENABLE_CLASSIC 6857 uint16_t sniff_min_interval; 6858 switch (connection->sniff_min_interval){ 6859 case 0: 6860 break; 6861 case 0xffff: 6862 connection->sniff_min_interval = 0; 6863 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6864 return true; 6865 default: 6866 sniff_min_interval = connection->sniff_min_interval; 6867 connection->sniff_min_interval = 0; 6868 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6869 return true; 6870 } 6871 6872 if (connection->sniff_subrating_max_latency != 0xffff){ 6873 uint16_t max_latency = connection->sniff_subrating_max_latency; 6874 connection->sniff_subrating_max_latency = 0; 6875 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6876 return true; 6877 } 6878 6879 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6880 uint8_t service_type = (uint8_t) connection->qos_service_type; 6881 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6882 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); 6883 return true; 6884 } 6885 6886 if (connection->request_role != HCI_ROLE_INVALID){ 6887 hci_role_t role = connection->request_role; 6888 connection->request_role = HCI_ROLE_INVALID; 6889 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6890 return true; 6891 } 6892 #endif 6893 6894 if (connection->gap_connection_tasks != 0){ 6895 #ifdef ENABLE_CLASSIC 6896 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6897 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6898 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6899 return true; 6900 } 6901 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6902 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6903 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6904 return true; 6905 } 6906 #endif 6907 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6908 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6909 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6910 return true; 6911 } 6912 } 6913 6914 #ifdef ENABLE_BLE 6915 switch (connection->le_con_parameter_update_state){ 6916 // response to L2CAP CON PARAMETER UPDATE REQUEST 6917 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6918 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6919 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6920 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6921 0x0000, 0xffff); 6922 return true; 6923 case CON_PARAMETER_UPDATE_REPLY: 6924 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6925 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6926 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6927 0x0000, 0xffff); 6928 return true; 6929 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6930 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6931 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6932 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6933 return true; 6934 default: 6935 break; 6936 } 6937 if (connection->le_phy_update_all_phys != 0xffu){ 6938 uint8_t all_phys = connection->le_phy_update_all_phys; 6939 connection->le_phy_update_all_phys = 0xff; 6940 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); 6941 return true; 6942 } 6943 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6944 if (connection->le_past_sync_handle != HCI_CON_HANDLE_INVALID){ 6945 hci_con_handle_t sync_handle = connection->le_past_sync_handle; 6946 connection->le_past_sync_handle = HCI_CON_HANDLE_INVALID; 6947 hci_send_cmd(&hci_le_periodic_advertising_sync_transfer, connection->con_handle, connection->le_past_service_data, sync_handle); 6948 return true; 6949 } 6950 #endif 6951 #endif 6952 } 6953 return false; 6954 } 6955 6956 static void hci_run(void){ 6957 6958 // stack state sub statemachines 6959 switch (hci_stack->state) { 6960 case HCI_STATE_INITIALIZING: 6961 hci_initializing_run(); 6962 break; 6963 case HCI_STATE_HALTING: 6964 hci_halting_run(); 6965 break; 6966 case HCI_STATE_FALLING_ASLEEP: 6967 hci_falling_asleep_run(); 6968 break; 6969 default: 6970 break; 6971 } 6972 6973 // allow to run after initialization to working transition 6974 if (hci_stack->state != HCI_STATE_WORKING){ 6975 return; 6976 } 6977 6978 bool done; 6979 6980 // send continuation fragments first, as they block the prepared packet buffer 6981 done = hci_run_acl_fragments(); 6982 if (done) return; 6983 6984 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6985 done = hci_run_iso_fragments(); 6986 if (done) return; 6987 #endif 6988 6989 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6990 // send host num completed packets next as they don't require num_cmd_packets > 0 6991 if (!hci_can_send_comand_packet_transport()) return; 6992 if (hci_stack->host_completed_packets){ 6993 hci_host_num_completed_packets(); 6994 return; 6995 } 6996 #endif 6997 6998 if (!hci_can_send_command_packet_now()) return; 6999 7000 // global/non-connection oriented commands 7001 7002 7003 #ifdef ENABLE_CLASSIC 7004 // general gap classic 7005 done = hci_run_general_gap_classic(); 7006 if (done) return; 7007 #endif 7008 7009 #ifdef ENABLE_BLE 7010 // general gap le 7011 done = hci_run_general_gap_le(); 7012 if (done) return; 7013 7014 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7015 // ISO related tasks, e.g. BIG create/terminate/sync 7016 done = hci_run_iso_tasks(); 7017 if (done) return; 7018 #endif 7019 #endif 7020 7021 // send pending HCI commands 7022 hci_run_general_pending_commands(); 7023 } 7024 7025 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 7026 // house-keeping 7027 7028 #ifdef ENABLE_CLASSIC 7029 bd_addr_t addr; 7030 hci_connection_t * conn; 7031 #endif 7032 #ifdef ENABLE_LE_CENTRAL 7033 uint8_t initiator_filter_policy; 7034 #endif 7035 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7036 uint8_t i; 7037 uint8_t num_cis; 7038 hci_con_handle_t cis_handle; 7039 uint8_t status; 7040 #endif 7041 7042 uint16_t opcode = little_endian_read_16(packet, 0); 7043 switch (opcode) { 7044 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 7045 hci_stack->loopback_mode = packet[3]; 7046 break; 7047 7048 #ifdef ENABLE_CLASSIC 7049 case HCI_OPCODE_HCI_CREATE_CONNECTION: 7050 reverse_bd_addr(&packet[3], addr); 7051 log_info("Create_connection to %s", bd_addr_to_str(addr)); 7052 7053 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 7054 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 7055 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 7056 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 7057 } 7058 7059 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7060 if (!conn) { 7061 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7062 if (!conn) { 7063 // notify client that alloc failed 7064 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7065 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 7066 } 7067 conn->state = SEND_CREATE_CONNECTION; 7068 conn->role = HCI_ROLE_MASTER; 7069 } 7070 7071 log_info("conn state %u", conn->state); 7072 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 7073 switch (conn->state) { 7074 // if connection active exists 7075 case OPEN: 7076 // and OPEN, emit connection complete command 7077 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 7078 // packet not sent to controller 7079 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7080 case RECEIVED_DISCONNECTION_COMPLETE: 7081 // create connection triggered in disconnect complete event, let's do it now 7082 break; 7083 case SEND_CREATE_CONNECTION: 7084 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 7085 if (hci_classic_operation_active()){ 7086 return ERROR_CODE_SUCCESS; 7087 } 7088 #endif 7089 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 7090 break; 7091 default: 7092 // otherwise, just ignore as it is already in the open process 7093 // packet not sent to controller 7094 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7095 } 7096 conn->state = SENT_CREATE_CONNECTION; 7097 7098 // track outgoing connection 7099 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 7100 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 7101 break; 7102 7103 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 7104 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 7105 // setup_synchronous_connection? Voice setting at offset 22 7106 // TODO: compare to current setting if sco connection already active 7107 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 7108 break; 7109 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 7110 // accept_synchronous_connection? Voice setting at offset 18 7111 // TODO: compare to current setting if sco connection already active 7112 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 7113 // track outgoing connection 7114 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 7115 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 7116 break; 7117 #endif 7118 #endif 7119 7120 #ifdef ENABLE_BLE 7121 #ifdef ENABLE_LE_CENTRAL 7122 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 7123 // white list used? 7124 initiator_filter_policy = packet[7]; 7125 switch (initiator_filter_policy) { 7126 case 0: 7127 // whitelist not used 7128 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 7129 break; 7130 case 1: 7131 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 7132 break; 7133 default: 7134 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 7135 break; 7136 } 7137 // track outgoing connection 7138 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 7139 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 7140 break; 7141 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 7142 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 7143 break; 7144 #endif 7145 #endif /* ENABLE_BLE */ 7146 default: 7147 break; 7148 } 7149 7150 hci_stack->num_cmd_packets--; 7151 7152 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 7153 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 7154 if (err != 0){ 7155 return ERROR_CODE_HARDWARE_FAILURE; 7156 } 7157 return ERROR_CODE_SUCCESS; 7158 } 7159 7160 // disconnect because of security block 7161 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 7162 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7163 if (!connection) return; 7164 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 7165 } 7166 7167 7168 // Configure Secure Simple Pairing 7169 7170 #ifdef ENABLE_CLASSIC 7171 7172 // enable will enable SSP during init 7173 void gap_ssp_set_enable(int enable){ 7174 hci_stack->ssp_enable = enable; 7175 } 7176 7177 static int hci_local_ssp_activated(void){ 7178 return gap_ssp_supported() && hci_stack->ssp_enable; 7179 } 7180 7181 // if set, BTstack will respond to io capability request using authentication requirement 7182 void gap_ssp_set_io_capability(int io_capability){ 7183 hci_stack->ssp_io_capability = io_capability; 7184 } 7185 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 7186 hci_stack->ssp_authentication_requirement = authentication_requirement; 7187 } 7188 7189 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 7190 void gap_ssp_set_auto_accept(int auto_accept){ 7191 hci_stack->ssp_auto_accept = auto_accept; 7192 } 7193 7194 void gap_secure_connections_enable(bool enable){ 7195 hci_stack->secure_connections_enable = enable; 7196 } 7197 bool gap_secure_connections_active(void){ 7198 return hci_stack->secure_connections_active; 7199 } 7200 7201 #endif 7202 7203 // va_list part of hci_send_cmd 7204 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 7205 if (!hci_can_send_command_packet_now()){ 7206 log_error("hci_send_cmd called but cannot send packet now"); 7207 return ERROR_CODE_COMMAND_DISALLOWED; 7208 } 7209 7210 // for HCI INITIALIZATION 7211 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 7212 hci_stack->last_cmd_opcode = cmd->opcode; 7213 7214 hci_reserve_packet_buffer(); 7215 uint8_t * packet = hci_stack->hci_packet_buffer; 7216 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 7217 uint8_t status = hci_send_cmd_packet(packet, size); 7218 7219 // release packet buffer on error or for synchronous transport implementations 7220 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 7221 hci_release_packet_buffer(); 7222 hci_emit_transport_packet_sent(); 7223 } 7224 7225 return status; 7226 } 7227 7228 /** 7229 * pre: numcmds >= 0 - it's allowed to send a command to the controller 7230 */ 7231 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 7232 va_list argptr; 7233 va_start(argptr, cmd); 7234 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 7235 va_end(argptr); 7236 return status; 7237 } 7238 7239 // Create various non-HCI events. 7240 // TODO: generalize, use table similar to hci_create_command 7241 7242 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 7243 // dump packet 7244 if (dump) { 7245 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 7246 } 7247 7248 // dispatch to all event handlers 7249 btstack_linked_list_iterator_t it; 7250 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 7251 while (btstack_linked_list_iterator_has_next(&it)){ 7252 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 7253 entry->callback(HCI_EVENT_PACKET, 0, event, size); 7254 } 7255 } 7256 7257 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 7258 if (!hci_stack->acl_packet_handler) return; 7259 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 7260 } 7261 7262 #ifdef ENABLE_CLASSIC 7263 static void hci_notify_if_sco_can_send_now(void){ 7264 // notify SCO sender if waiting 7265 if (!hci_stack->sco_waiting_for_can_send_now) return; 7266 if (hci_can_send_sco_packet_now()){ 7267 hci_stack->sco_waiting_for_can_send_now = 0; 7268 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 7269 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 7270 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 7271 } 7272 } 7273 7274 // parsing end emitting has been merged to reduce code size 7275 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 7276 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 7277 7278 uint8_t * eir_data; 7279 ad_context_t context; 7280 const uint8_t * name; 7281 uint8_t name_len; 7282 7283 if (size < 3) return; 7284 7285 int event_type = hci_event_packet_get_type(packet); 7286 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 7287 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 7288 7289 switch (event_type){ 7290 case HCI_EVENT_INQUIRY_RESULT: 7291 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7292 if (size != (3 + (num_responses * 14))) return; 7293 break; 7294 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7295 if (size != 257) return; 7296 if (num_responses != 1) return; 7297 break; 7298 default: 7299 return; 7300 } 7301 7302 // event[1] is set at the end 7303 int i; 7304 for (i=0; i<num_responses;i++){ 7305 memset(event, 0, sizeof(event)); 7306 event[0] = GAP_EVENT_INQUIRY_RESULT; 7307 uint8_t event_size = 27; // if name is not set by EIR 7308 7309 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 7310 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 7311 (void)memcpy(&event[9], 7312 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 7313 3); // class of device 7314 (void)memcpy(&event[12], 7315 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 7316 2); // clock offset 7317 7318 switch (event_type){ 7319 case HCI_EVENT_INQUIRY_RESULT: 7320 // 14,15,16,17 = 0, size 18 7321 break; 7322 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7323 event[14] = 1; 7324 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7325 // 16,17 = 0, size 18 7326 break; 7327 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7328 event[14] = 1; 7329 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7330 // EIR packets only contain a single inquiry response 7331 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 7332 name = NULL; 7333 // Iterate over EIR data 7334 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 7335 uint8_t data_type = ad_iterator_get_data_type(&context); 7336 uint8_t data_size = ad_iterator_get_data_len(&context); 7337 const uint8_t * data = ad_iterator_get_data(&context); 7338 // Prefer Complete Local Name over Shortened Local Name 7339 switch (data_type){ 7340 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 7341 if (name) continue; 7342 /* fall through */ 7343 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 7344 name = data; 7345 name_len = data_size; 7346 break; 7347 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 7348 if (data_size != 8) break; 7349 event[16] = 1; 7350 memcpy(&event[17], data, 8); 7351 break; 7352 default: 7353 break; 7354 } 7355 } 7356 if (name){ 7357 event[25] = 1; 7358 // truncate name if needed 7359 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 7360 event[26] = len; 7361 (void)memcpy(&event[27], name, len); 7362 event_size += len; 7363 } 7364 break; 7365 default: 7366 return; 7367 } 7368 event[1] = event_size - 2; 7369 hci_emit_event(event, event_size, 1); 7370 } 7371 } 7372 #endif 7373 7374 void hci_emit_state(void){ 7375 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 7376 uint8_t event[3]; 7377 event[0] = BTSTACK_EVENT_STATE; 7378 event[1] = sizeof(event) - 2u; 7379 event[2] = hci_stack->state; 7380 hci_emit_event(event, sizeof(event), 1); 7381 } 7382 7383 #ifdef ENABLE_CLASSIC 7384 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 7385 uint8_t event[13]; 7386 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 7387 event[1] = sizeof(event) - 2; 7388 event[2] = status; 7389 little_endian_store_16(event, 3, con_handle); 7390 reverse_bd_addr(address, &event[5]); 7391 event[11] = 1; // ACL connection 7392 event[12] = 0; // encryption disabled 7393 hci_emit_event(event, sizeof(event), 1); 7394 } 7395 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 7396 if (disable_l2cap_timeouts) return; 7397 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 7398 uint8_t event[4]; 7399 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 7400 event[1] = sizeof(event) - 2; 7401 little_endian_store_16(event, 2, conn->con_handle); 7402 hci_emit_event(event, sizeof(event), 1); 7403 } 7404 #endif 7405 7406 #ifdef ENABLE_BLE 7407 #ifdef ENABLE_LE_CENTRAL 7408 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){ 7409 uint8_t event[21]; 7410 event[0] = HCI_EVENT_LE_META; 7411 event[1] = sizeof(event) - 2u; 7412 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 7413 event[3] = status; 7414 little_endian_store_16(event, 4, con_handle); 7415 event[6] = 0; // TODO: role 7416 event[7] = address_type; 7417 reverse_bd_addr(address, &event[8]); 7418 little_endian_store_16(event, 14, 0); // interval 7419 little_endian_store_16(event, 16, 0); // latency 7420 little_endian_store_16(event, 18, 0); // supervision timeout 7421 event[20] = 0; // master clock accuracy 7422 hci_emit_event(event, sizeof(event), 1); 7423 } 7424 #endif 7425 #endif 7426 7427 static void hci_emit_transport_packet_sent(void){ 7428 // notify upper stack that it might be possible to send again 7429 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 7430 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 7431 } 7432 7433 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 7434 uint8_t event[6]; 7435 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 7436 event[1] = sizeof(event) - 2u; 7437 event[2] = 0; // status = OK 7438 little_endian_store_16(event, 3, con_handle); 7439 event[5] = reason; 7440 hci_emit_event(event, sizeof(event), 1); 7441 } 7442 7443 static void hci_emit_nr_connections_changed(void){ 7444 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 7445 uint8_t event[3]; 7446 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 7447 event[1] = sizeof(event) - 2u; 7448 event[2] = nr_hci_connections(); 7449 hci_emit_event(event, sizeof(event), 1); 7450 } 7451 7452 static void hci_emit_hci_open_failed(void){ 7453 log_info("BTSTACK_EVENT_POWERON_FAILED"); 7454 uint8_t event[2]; 7455 event[0] = BTSTACK_EVENT_POWERON_FAILED; 7456 event[1] = sizeof(event) - 2u; 7457 hci_emit_event(event, sizeof(event), 1); 7458 } 7459 7460 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 7461 log_info("hci_emit_dedicated_bonding_result %u ", status); 7462 uint8_t event[9]; 7463 int pos = 0; 7464 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 7465 event[pos++] = sizeof(event) - 2u; 7466 event[pos++] = status; 7467 reverse_bd_addr(address, &event[pos]); 7468 hci_emit_event(event, sizeof(event), 1); 7469 } 7470 7471 7472 #ifdef ENABLE_CLASSIC 7473 7474 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 7475 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 7476 uint8_t event[5]; 7477 int pos = 0; 7478 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 7479 event[pos++] = sizeof(event) - 2; 7480 little_endian_store_16(event, 2, con_handle); 7481 pos += 2; 7482 event[pos++] = level; 7483 hci_emit_event(event, sizeof(event), 1); 7484 } 7485 7486 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 7487 if (!connection) return LEVEL_0; 7488 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 7489 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 7490 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 7491 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 7492 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 7493 // LEVEL 4 always requires 128 bit encrytion key size 7494 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 7495 security_level = LEVEL_3; 7496 } 7497 return security_level; 7498 } 7499 7500 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable){ 7501 uint8_t event[4]; 7502 event[0] = BTSTACK_EVENT_SCAN_MODE_CHANGED; 7503 event[1] = sizeof(event) - 2; 7504 event[2] = discoverable; 7505 event[3] = connectable; 7506 hci_emit_event(event, sizeof(event), 1); 7507 } 7508 7509 // query if remote side supports eSCO 7510 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 7511 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7512 if (!connection) return false; 7513 return (connection->remote_supported_features[0] & 1) != 0; 7514 } 7515 7516 static bool hci_ssp_supported(hci_connection_t * connection){ 7517 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 7518 return (connection->bonding_flags & mask) == mask; 7519 } 7520 7521 // query if remote side supports SSP 7522 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 7523 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7524 if (!connection) return false; 7525 return hci_ssp_supported(connection) ? 1 : 0; 7526 } 7527 7528 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 7529 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 7530 } 7531 7532 /** 7533 * Check if remote supported features query has completed 7534 */ 7535 bool hci_remote_features_available(hci_con_handle_t handle){ 7536 hci_connection_t * connection = hci_connection_for_handle(handle); 7537 if (!connection) return false; 7538 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 7539 } 7540 7541 /** 7542 * Trigger remote supported features query 7543 */ 7544 7545 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 7546 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 7547 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 7548 } 7549 } 7550 7551 void hci_remote_features_query(hci_con_handle_t con_handle){ 7552 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7553 if (!connection) return; 7554 hci_trigger_remote_features_for_connection(connection); 7555 hci_run(); 7556 } 7557 7558 // GAP API 7559 /** 7560 * @bbrief enable/disable bonding. default is enabled 7561 * @praram enabled 7562 */ 7563 void gap_set_bondable_mode(int enable){ 7564 hci_stack->bondable = enable ? 1 : 0; 7565 } 7566 /** 7567 * @brief Get bondable mode. 7568 * @return 1 if bondable 7569 */ 7570 int gap_get_bondable_mode(void){ 7571 return hci_stack->bondable; 7572 } 7573 7574 /** 7575 * @brief map link keys to security levels 7576 */ 7577 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 7578 switch (link_key_type){ 7579 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7580 return LEVEL_4; 7581 case COMBINATION_KEY: 7582 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7583 return LEVEL_3; 7584 default: 7585 return LEVEL_2; 7586 } 7587 } 7588 7589 /** 7590 * @brief map link keys to secure connection yes/no 7591 */ 7592 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 7593 switch (link_key_type){ 7594 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7595 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7596 return true; 7597 default: 7598 return false; 7599 } 7600 } 7601 7602 /** 7603 * @brief map link keys to authenticated 7604 */ 7605 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 7606 switch (link_key_type){ 7607 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7608 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7609 return true; 7610 default: 7611 return false; 7612 } 7613 } 7614 7615 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 7616 log_info("gap_mitm_protection_required_for_security_level %u", level); 7617 return level > LEVEL_2; 7618 } 7619 7620 /** 7621 * @brief get current security level 7622 */ 7623 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 7624 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7625 if (!connection) return LEVEL_0; 7626 return gap_security_level_for_connection(connection); 7627 } 7628 7629 /** 7630 * @brief request connection to device to 7631 * @result GAP_AUTHENTICATION_RESULT 7632 */ 7633 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 7634 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7635 if (!connection){ 7636 hci_emit_security_level(con_handle, LEVEL_0); 7637 return; 7638 } 7639 7640 btstack_assert(hci_is_le_connection(connection) == false); 7641 7642 // 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) 7643 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 7644 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 7645 requested_level = LEVEL_4; 7646 } 7647 7648 gap_security_level_t current_level = gap_security_level(con_handle); 7649 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 7650 requested_level, connection->requested_security_level, current_level); 7651 7652 // authentication active if authentication request was sent or planned level > 0 7653 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 7654 if (authentication_active){ 7655 // authentication already active 7656 if (connection->requested_security_level < requested_level){ 7657 // increase requested level as new level is higher 7658 // TODO: handle re-authentication when done 7659 connection->requested_security_level = requested_level; 7660 } 7661 } else { 7662 // no request active, notify if security sufficient 7663 if (requested_level <= current_level){ 7664 hci_emit_security_level(con_handle, current_level); 7665 return; 7666 } 7667 7668 // store request 7669 connection->requested_security_level = requested_level; 7670 7671 // start to authenticate connection 7672 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 7673 7674 // request remote features if not already active, also trigger hci_run 7675 hci_remote_features_query(con_handle); 7676 } 7677 } 7678 7679 /** 7680 * @brief start dedicated bonding with device. disconnect after bonding 7681 * @param device 7682 * @param request MITM protection 7683 * @result GAP_DEDICATED_BONDING_COMPLETE 7684 */ 7685 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 7686 7687 // create connection state machine 7688 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 7689 7690 if (!connection){ 7691 return BTSTACK_MEMORY_ALLOC_FAILED; 7692 } 7693 7694 // delete linkn key 7695 gap_drop_link_key_for_bd_addr(device); 7696 7697 // configure LEVEL_2/3, dedicated bonding 7698 connection->state = SEND_CREATE_CONNECTION; 7699 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 7700 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 7701 connection->bonding_flags = BONDING_DEDICATED; 7702 7703 // wait for GAP Security Result and send GAP Dedicated Bonding complete 7704 7705 // handle: connnection failure (connection complete != ok) 7706 // handle: authentication failure 7707 // handle: disconnect on done 7708 7709 hci_run(); 7710 7711 return 0; 7712 } 7713 7714 void gap_set_local_name(const char * local_name){ 7715 hci_stack->local_name = local_name; 7716 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7717 // also update EIR if not set by user 7718 if (hci_stack->eir_data == NULL){ 7719 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7720 } 7721 hci_run(); 7722 } 7723 #endif 7724 7725 7726 #ifdef ENABLE_BLE 7727 7728 #ifdef ENABLE_LE_CENTRAL 7729 void gap_start_scan(void){ 7730 hci_stack->le_scanning_enabled = true; 7731 hci_run(); 7732 } 7733 7734 void gap_stop_scan(void){ 7735 hci_stack->le_scanning_enabled = false; 7736 hci_run(); 7737 } 7738 7739 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7740 hci_stack->le_scan_type = scan_type; 7741 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7742 hci_stack->le_scan_interval = scan_interval; 7743 hci_stack->le_scan_window = scan_window; 7744 hci_stack->le_scanning_param_update = true; 7745 hci_run(); 7746 } 7747 7748 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7749 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7750 } 7751 7752 void gap_set_scan_duplicate_filter(bool enabled){ 7753 hci_stack->le_scan_filter_duplicates = enabled ? 1 : 0; 7754 } 7755 7756 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7757 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7758 if (!conn){ 7759 // disallow if le connection is already outgoing 7760 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7761 log_error("le connection already active"); 7762 return ERROR_CODE_COMMAND_DISALLOWED; 7763 } 7764 7765 log_info("gap_connect: no connection exists yet, creating context"); 7766 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7767 if (!conn){ 7768 // notify client that alloc failed 7769 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7770 log_info("gap_connect: failed to alloc hci_connection_t"); 7771 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7772 } 7773 7774 // set le connecting state 7775 if (hci_is_le_connection_type(addr_type)){ 7776 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7777 } 7778 7779 conn->state = SEND_CREATE_CONNECTION; 7780 log_info("gap_connect: send create connection next"); 7781 hci_run(); 7782 return ERROR_CODE_SUCCESS; 7783 } 7784 7785 if (!hci_is_le_connection(conn) || 7786 (conn->state == SEND_CREATE_CONNECTION) || 7787 (conn->state == SENT_CREATE_CONNECTION)) { 7788 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7789 log_error("gap_connect: classic connection or connect is already being created"); 7790 return GATT_CLIENT_IN_WRONG_STATE; 7791 } 7792 7793 // check if connection was just disconnected 7794 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7795 log_info("gap_connect: send create connection (again)"); 7796 conn->state = SEND_CREATE_CONNECTION; 7797 hci_run(); 7798 return ERROR_CODE_SUCCESS; 7799 } 7800 7801 log_info("gap_connect: context exists with state %u", conn->state); 7802 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7803 hci_run(); 7804 return ERROR_CODE_SUCCESS; 7805 } 7806 7807 // @assumption: only a single outgoing LE Connection exists 7808 static hci_connection_t * gap_get_outgoing_connection(void){ 7809 btstack_linked_item_t *it; 7810 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7811 hci_connection_t * conn = (hci_connection_t *) it; 7812 if (!hci_is_le_connection(conn)) continue; 7813 switch (conn->state){ 7814 case SEND_CREATE_CONNECTION: 7815 case SENT_CREATE_CONNECTION: 7816 return conn; 7817 default: 7818 break; 7819 }; 7820 } 7821 return NULL; 7822 } 7823 7824 uint8_t gap_connect_cancel(void){ 7825 hci_connection_t * conn; 7826 switch (hci_stack->le_connecting_request){ 7827 case LE_CONNECTING_IDLE: 7828 break; 7829 case LE_CONNECTING_WHITELIST: 7830 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7831 hci_run(); 7832 break; 7833 case LE_CONNECTING_DIRECT: 7834 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7835 conn = gap_get_outgoing_connection(); 7836 if (conn == NULL){ 7837 hci_run(); 7838 } else { 7839 switch (conn->state){ 7840 case SEND_CREATE_CONNECTION: 7841 // skip sending create connection and emit event instead 7842 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7843 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7844 btstack_memory_hci_connection_free( conn ); 7845 break; 7846 case SENT_CREATE_CONNECTION: 7847 // let hci_run_general_gap_le cancel outgoing connection 7848 hci_run(); 7849 break; 7850 default: 7851 break; 7852 } 7853 } 7854 break; 7855 default: 7856 btstack_unreachable(); 7857 break; 7858 } 7859 return ERROR_CODE_SUCCESS; 7860 } 7861 7862 /** 7863 * @brief Set connection parameters for outgoing connections 7864 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7865 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7866 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7867 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7868 * @param conn_latency, default: 4 7869 * @param supervision_timeout (unit: 10ms), default: 720 ms 7870 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7871 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7872 */ 7873 7874 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7875 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7876 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7877 hci_stack->le_connection_scan_interval = conn_scan_interval; 7878 hci_stack->le_connection_scan_window = conn_scan_window; 7879 hci_stack->le_connection_interval_min = conn_interval_min; 7880 hci_stack->le_connection_interval_max = conn_interval_max; 7881 hci_stack->le_connection_latency = conn_latency; 7882 hci_stack->le_supervision_timeout = supervision_timeout; 7883 hci_stack->le_minimum_ce_length = min_ce_length; 7884 hci_stack->le_maximum_ce_length = max_ce_length; 7885 } 7886 #endif 7887 7888 /** 7889 * @brief Updates the connection parameters for a given LE connection 7890 * @param handle 7891 * @param conn_interval_min (unit: 1.25ms) 7892 * @param conn_interval_max (unit: 1.25ms) 7893 * @param conn_latency 7894 * @param supervision_timeout (unit: 10ms) 7895 * @return 0 if ok 7896 */ 7897 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7898 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7899 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7900 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7901 connection->le_conn_interval_min = conn_interval_min; 7902 connection->le_conn_interval_max = conn_interval_max; 7903 connection->le_conn_latency = conn_latency; 7904 connection->le_supervision_timeout = supervision_timeout; 7905 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7906 hci_run(); 7907 return 0; 7908 } 7909 7910 /** 7911 * @brief Request an update of the connection parameter for a given LE connection 7912 * @param handle 7913 * @param conn_interval_min (unit: 1.25ms) 7914 * @param conn_interval_max (unit: 1.25ms) 7915 * @param conn_latency 7916 * @param supervision_timeout (unit: 10ms) 7917 * @return 0 if ok 7918 */ 7919 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7920 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7921 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7922 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7923 connection->le_conn_interval_min = conn_interval_min; 7924 connection->le_conn_interval_max = conn_interval_max; 7925 connection->le_conn_latency = conn_latency; 7926 connection->le_supervision_timeout = supervision_timeout; 7927 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7928 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7929 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7930 return 0; 7931 } 7932 7933 #ifdef ENABLE_LE_PERIPHERAL 7934 7935 /** 7936 * @brief Set Advertisement Data 7937 * @param advertising_data_length 7938 * @param advertising_data (max 31 octets) 7939 * @note data is not copied, pointer has to stay valid 7940 */ 7941 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7942 hci_stack->le_advertisements_data_len = advertising_data_length; 7943 hci_stack->le_advertisements_data = advertising_data; 7944 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7945 hci_run(); 7946 } 7947 7948 /** 7949 * @brief Set Scan Response Data 7950 * @param advertising_data_length 7951 * @param advertising_data (max 31 octets) 7952 * @note data is not copied, pointer has to stay valid 7953 */ 7954 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7955 hci_stack->le_scan_response_data_len = scan_response_data_length; 7956 hci_stack->le_scan_response_data = scan_response_data; 7957 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7958 hci_run(); 7959 } 7960 7961 /** 7962 * @brief Set Advertisement Parameters 7963 * @param adv_int_min 7964 * @param adv_int_max 7965 * @param adv_type 7966 * @param direct_address_type 7967 * @param direct_address 7968 * @param channel_map 7969 * @param filter_policy 7970 * 7971 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7972 */ 7973 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7974 uint8_t direct_address_typ, bd_addr_t direct_address, 7975 uint8_t channel_map, uint8_t filter_policy) { 7976 7977 hci_stack->le_advertisements_interval_min = adv_int_min; 7978 hci_stack->le_advertisements_interval_max = adv_int_max; 7979 hci_stack->le_advertisements_type = adv_type; 7980 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7981 hci_stack->le_advertisements_channel_map = channel_map; 7982 hci_stack->le_advertisements_filter_policy = filter_policy; 7983 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7984 6); 7985 7986 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7987 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7988 hci_run(); 7989 } 7990 7991 /** 7992 * @brief Enable/Disable Advertisements 7993 * @param enabled 7994 */ 7995 void gap_advertisements_enable(int enabled){ 7996 if (enabled == 0){ 7997 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7998 } else { 7999 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 8000 } 8001 hci_update_advertisements_enabled_for_current_roles(); 8002 hci_run(); 8003 } 8004 8005 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8006 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 8007 btstack_linked_list_iterator_t it; 8008 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 8009 while (btstack_linked_list_iterator_has_next(&it)){ 8010 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 8011 if ( item->advertising_handle == advertising_handle ) { 8012 return item; 8013 } 8014 } 8015 return NULL; 8016 } 8017 8018 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 8019 // find free advertisement handle 8020 uint8_t advertisement_handle; 8021 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 8022 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 8023 } 8024 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8025 // clear 8026 memset(storage, 0, sizeof(le_advertising_set_t)); 8027 // copy params 8028 storage->advertising_handle = advertisement_handle; 8029 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 8030 // add to list 8031 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 8032 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 8033 *out_advertising_handle = advertisement_handle; 8034 // set tasks and start 8035 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8036 hci_run(); 8037 return ERROR_CODE_SUCCESS; 8038 } 8039 8040 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 8041 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8042 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8043 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 8044 // set tasks and start 8045 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8046 hci_run(); 8047 return ERROR_CODE_SUCCESS; 8048 } 8049 8050 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 8051 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8052 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8053 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 8054 return ERROR_CODE_SUCCESS; 8055 } 8056 8057 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 8058 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8059 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8060 memcpy(advertising_set->random_address, random_address, 6); 8061 // set tasks and start 8062 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 8063 hci_run(); 8064 return ERROR_CODE_SUCCESS; 8065 } 8066 8067 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 8068 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8069 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8070 advertising_set->adv_data = advertising_data; 8071 advertising_set->adv_data_len = advertising_data_length; 8072 // set tasks and start 8073 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 8074 hci_run(); 8075 return ERROR_CODE_SUCCESS; 8076 } 8077 8078 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){ 8079 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8080 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8081 advertising_set->scan_data = scan_response_data; 8082 advertising_set->scan_data_len = scan_response_data_length; 8083 // set tasks and start 8084 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 8085 hci_run(); 8086 return ERROR_CODE_SUCCESS; 8087 } 8088 8089 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 8090 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8091 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8092 advertising_set->enable_timeout = timeout; 8093 advertising_set->enable_max_scan_events = num_extended_advertising_events; 8094 // set tasks and start 8095 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 8096 hci_run(); 8097 return ERROR_CODE_SUCCESS; 8098 } 8099 8100 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 8101 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8102 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8103 // set tasks and start 8104 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 8105 hci_run(); 8106 return ERROR_CODE_SUCCESS; 8107 } 8108 8109 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 8110 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8111 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8112 // set tasks and start 8113 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 8114 hci_run(); 8115 return ERROR_CODE_SUCCESS; 8116 } 8117 8118 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 8119 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 8120 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8121 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8122 // periodic advertising requires neither connectable, scannable, legacy or anonymous 8123 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8124 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 8125 // set tasks and start 8126 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 8127 hci_run(); 8128 return ERROR_CODE_SUCCESS; 8129 } 8130 8131 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 8132 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8133 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8134 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 8135 return ERROR_CODE_SUCCESS; 8136 } 8137 8138 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 8139 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8140 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8141 advertising_set->periodic_data = periodic_data; 8142 advertising_set->periodic_data_len = periodic_data_length; 8143 // set tasks and start 8144 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 8145 hci_run(); 8146 return ERROR_CODE_SUCCESS; 8147 } 8148 8149 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 8150 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8151 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8152 // set tasks and start 8153 advertising_set->periodic_include_adi = include_adi; 8154 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 8155 hci_run(); 8156 return ERROR_CODE_SUCCESS; 8157 } 8158 8159 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 8160 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8161 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8162 // set tasks and start 8163 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 8164 hci_run(); 8165 return ERROR_CODE_SUCCESS; 8166 } 8167 8168 uint8_t gap_periodic_advertising_sync_transfer_set_default_parameters(uint8_t mode, uint16_t skip, uint16_t sync_timeout, uint8_t cte_type){ 8169 hci_stack->le_past_mode = mode; 8170 hci_stack->le_past_skip = skip; 8171 hci_stack->le_past_sync_timeout = sync_timeout; 8172 hci_stack->le_past_cte_type = cte_type; 8173 hci_stack->le_past_set_default_params = true; 8174 hci_run(); 8175 return ERROR_CODE_SUCCESS; 8176 } 8177 8178 uint8_t gap_periodic_advertising_sync_transfer_send(hci_con_handle_t con_handle, uint16_t service_data, hci_con_handle_t sync_handle){ 8179 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8180 if (hci_connection == NULL){ 8181 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8182 } 8183 hci_connection->le_past_sync_handle = sync_handle; 8184 hci_connection->le_past_service_data = service_data; 8185 hci_run(); 8186 return ERROR_CODE_SUCCESS; 8187 } 8188 8189 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 8190 8191 #endif 8192 8193 #endif 8194 8195 void hci_le_set_own_address_type(uint8_t own_address_type){ 8196 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 8197 if (own_address_type == hci_stack->le_own_addr_type) return; 8198 hci_stack->le_own_addr_type = own_address_type; 8199 8200 #ifdef ENABLE_LE_PERIPHERAL 8201 // update advertisement parameters, too 8202 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8203 hci_run(); 8204 #endif 8205 #ifdef ENABLE_LE_CENTRAL 8206 // note: we don't update scan parameters or modify ongoing connection attempts 8207 #endif 8208 } 8209 8210 void hci_le_random_address_set(const bd_addr_t random_address){ 8211 memcpy(hci_stack->le_random_address, random_address, 6); 8212 hci_stack->le_random_address_set = true; 8213 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 8214 hci_run(); 8215 } 8216 8217 #endif 8218 8219 uint8_t gap_disconnect(hci_con_handle_t handle){ 8220 hci_connection_t * conn = hci_connection_for_handle(handle); 8221 if (!conn){ 8222 hci_emit_disconnection_complete(handle, 0); 8223 return 0; 8224 } 8225 // ignore if already disconnected 8226 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 8227 return 0; 8228 } 8229 conn->state = SEND_DISCONNECT; 8230 hci_run(); 8231 return 0; 8232 } 8233 8234 int gap_read_rssi(hci_con_handle_t con_handle){ 8235 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8236 if (hci_connection == NULL) return 0; 8237 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 8238 hci_run(); 8239 return 1; 8240 } 8241 8242 /** 8243 * @brief Get connection type 8244 * @param con_handle 8245 * @result connection_type 8246 */ 8247 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 8248 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 8249 if (!conn) return GAP_CONNECTION_INVALID; 8250 switch (conn->address_type){ 8251 case BD_ADDR_TYPE_LE_PUBLIC: 8252 case BD_ADDR_TYPE_LE_RANDOM: 8253 return GAP_CONNECTION_LE; 8254 case BD_ADDR_TYPE_SCO: 8255 return GAP_CONNECTION_SCO; 8256 case BD_ADDR_TYPE_ACL: 8257 return GAP_CONNECTION_ACL; 8258 default: 8259 return GAP_CONNECTION_INVALID; 8260 } 8261 } 8262 8263 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 8264 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 8265 if (!conn) return HCI_ROLE_INVALID; 8266 return (hci_role_t) conn->role; 8267 } 8268 8269 8270 #ifdef ENABLE_CLASSIC 8271 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 8272 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8273 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8274 conn->request_role = role; 8275 hci_run(); 8276 return ERROR_CODE_SUCCESS; 8277 } 8278 #endif 8279 8280 #ifdef ENABLE_BLE 8281 8282 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){ 8283 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8284 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8285 8286 conn->le_phy_update_all_phys = all_phys; 8287 conn->le_phy_update_tx_phys = tx_phys; 8288 conn->le_phy_update_rx_phys = rx_phys; 8289 conn->le_phy_update_phy_options = phy_options; 8290 8291 hci_run(); 8292 8293 return 0; 8294 } 8295 8296 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8297 // check if already in list 8298 btstack_linked_list_iterator_t it; 8299 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8300 while (btstack_linked_list_iterator_has_next(&it)) { 8301 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 8302 if (entry->address_type != address_type) { 8303 continue; 8304 } 8305 if (memcmp(entry->address, address, 6) != 0) { 8306 continue; 8307 } 8308 // disallow if already scheduled to add 8309 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 8310 return ERROR_CODE_COMMAND_DISALLOWED; 8311 } 8312 // still on controller, but scheduled to remove -> re-add 8313 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 8314 return ERROR_CODE_SUCCESS; 8315 } 8316 // alloc and add to list 8317 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 8318 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8319 entry->address_type = address_type; 8320 (void)memcpy(entry->address, address, 6); 8321 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 8322 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 8323 return ERROR_CODE_SUCCESS; 8324 } 8325 8326 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8327 btstack_linked_list_iterator_t it; 8328 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8329 while (btstack_linked_list_iterator_has_next(&it)){ 8330 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8331 if (entry->address_type != address_type) { 8332 continue; 8333 } 8334 if (memcmp(entry->address, address, 6) != 0) { 8335 continue; 8336 } 8337 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8338 // remove from controller if already present 8339 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8340 } else { 8341 // directly remove entry from whitelist 8342 btstack_linked_list_iterator_remove(&it); 8343 btstack_memory_whitelist_entry_free(entry); 8344 } 8345 return ERROR_CODE_SUCCESS; 8346 } 8347 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8348 } 8349 8350 static void hci_whitelist_clear(void){ 8351 btstack_linked_list_iterator_t it; 8352 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8353 while (btstack_linked_list_iterator_has_next(&it)){ 8354 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8355 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8356 // remove from controller if already present 8357 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8358 continue; 8359 } 8360 // directly remove entry from whitelist 8361 btstack_linked_list_iterator_remove(&it); 8362 btstack_memory_whitelist_entry_free(entry); 8363 } 8364 } 8365 8366 // free all entries unconditionally 8367 static void hci_whitelist_free(void){ 8368 btstack_linked_list_iterator_t lit; 8369 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 8370 while (btstack_linked_list_iterator_has_next(&lit)){ 8371 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 8372 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 8373 btstack_memory_whitelist_entry_free(entry); 8374 } 8375 } 8376 8377 /** 8378 * @brief Clear Whitelist 8379 * @return 0 if ok 8380 */ 8381 uint8_t gap_whitelist_clear(void){ 8382 hci_whitelist_clear(); 8383 hci_run(); 8384 return ERROR_CODE_SUCCESS; 8385 } 8386 8387 /** 8388 * @brief Add Device to Whitelist 8389 * @param address_typ 8390 * @param address 8391 * @return 0 if ok 8392 */ 8393 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8394 uint8_t status = hci_whitelist_add(address_type, address); 8395 if (status){ 8396 return status; 8397 } 8398 hci_run(); 8399 return ERROR_CODE_SUCCESS; 8400 } 8401 8402 /** 8403 * @brief Remove Device from Whitelist 8404 * @param address_typ 8405 * @param address 8406 * @return 0 if ok 8407 */ 8408 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8409 uint8_t status = hci_whitelist_remove(address_type, address); 8410 if (status){ 8411 return status; 8412 } 8413 hci_run(); 8414 return ERROR_CODE_SUCCESS; 8415 } 8416 8417 #ifdef ENABLE_LE_CENTRAL 8418 /** 8419 * @brief Connect with Whitelist 8420 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 8421 * @return - if ok 8422 */ 8423 uint8_t gap_connect_with_whitelist(void){ 8424 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 8425 return ERROR_CODE_COMMAND_DISALLOWED; 8426 } 8427 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8428 hci_run(); 8429 return ERROR_CODE_SUCCESS; 8430 } 8431 8432 /** 8433 * @brief Auto Connection Establishment - Start Connecting to device 8434 * @param address_typ 8435 * @param address 8436 * @return 0 if ok 8437 */ 8438 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 8439 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8440 return ERROR_CODE_COMMAND_DISALLOWED; 8441 } 8442 8443 uint8_t status = hci_whitelist_add(address_type, address); 8444 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 8445 return status; 8446 } 8447 8448 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8449 8450 hci_run(); 8451 return ERROR_CODE_SUCCESS; 8452 } 8453 8454 /** 8455 * @brief Auto Connection Establishment - Stop Connecting to device 8456 * @param address_typ 8457 * @param address 8458 * @return 0 if ok 8459 */ 8460 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 8461 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8462 return ERROR_CODE_COMMAND_DISALLOWED; 8463 } 8464 8465 hci_whitelist_remove(address_type, address); 8466 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 8467 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8468 } 8469 hci_run(); 8470 return 0; 8471 } 8472 8473 /** 8474 * @brief Auto Connection Establishment - Stop everything 8475 * @note Convenience function to stop all active auto connection attempts 8476 */ 8477 uint8_t gap_auto_connection_stop_all(void){ 8478 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 8479 return ERROR_CODE_COMMAND_DISALLOWED; 8480 } 8481 hci_whitelist_clear(); 8482 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8483 hci_run(); 8484 return ERROR_CODE_SUCCESS; 8485 } 8486 8487 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 8488 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8489 if (!conn) return 0; 8490 return conn->le_connection_interval; 8491 } 8492 #endif 8493 #endif 8494 8495 #ifdef ENABLE_CLASSIC 8496 /** 8497 * @brief Set Extended Inquiry Response data 8498 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 8499 * @note has to be done before stack starts up 8500 */ 8501 void gap_set_extended_inquiry_response(const uint8_t * data){ 8502 hci_stack->eir_data = data; 8503 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 8504 hci_run(); 8505 } 8506 8507 /** 8508 * @brief Start GAP Classic Inquiry 8509 * @param duration in 1.28s units 8510 * @return 0 if ok 8511 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 8512 */ 8513 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 8514 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8515 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8516 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 8517 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8518 } 8519 hci_stack->inquiry_state = duration_in_1280ms_units; 8520 hci_stack->inquiry_max_period_length = 0; 8521 hci_stack->inquiry_min_period_length = 0; 8522 hci_run(); 8523 return 0; 8524 } 8525 8526 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 8527 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8528 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8529 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8530 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8531 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8532 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8533 8534 hci_stack->inquiry_state = duration; 8535 hci_stack->inquiry_max_period_length = max_period_length; 8536 hci_stack->inquiry_min_period_length = min_period_length; 8537 hci_run(); 8538 return 0; 8539 } 8540 8541 /** 8542 * @brief Stop GAP Classic Inquiry 8543 * @return 0 if ok 8544 */ 8545 int gap_inquiry_stop(void){ 8546 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 8547 // emit inquiry complete event, before it even started 8548 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 8549 hci_emit_event(event, sizeof(event), 1); 8550 return 0; 8551 } 8552 switch (hci_stack->inquiry_state){ 8553 case GAP_INQUIRY_STATE_ACTIVE: 8554 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 8555 hci_run(); 8556 return ERROR_CODE_SUCCESS; 8557 case GAP_INQUIRY_STATE_PERIODIC: 8558 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 8559 hci_run(); 8560 return ERROR_CODE_SUCCESS; 8561 default: 8562 return ERROR_CODE_COMMAND_DISALLOWED; 8563 } 8564 } 8565 8566 void gap_inquiry_set_lap(uint32_t lap){ 8567 hci_stack->inquiry_lap = lap; 8568 } 8569 8570 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 8571 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 8572 hci_stack->inquiry_scan_window = inquiry_scan_window; 8573 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 8574 hci_run(); 8575 } 8576 8577 8578 /** 8579 * @brief Remote Name Request 8580 * @param addr 8581 * @param page_scan_repetition_mode 8582 * @param clock_offset only used when bit 15 is set 8583 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 8584 */ 8585 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 8586 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8587 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 8588 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 8589 hci_stack->remote_name_clock_offset = clock_offset; 8590 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 8591 hci_run(); 8592 return 0; 8593 } 8594 8595 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 8596 hci_stack->gap_pairing_state = state; 8597 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 8598 hci_run(); 8599 return 0; 8600 } 8601 8602 /** 8603 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 8604 * @param addr 8605 * @param pin_data 8606 * @param pin_len 8607 * @return 0 if ok 8608 */ 8609 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 8610 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8611 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 8612 hci_stack->gap_pairing_pin_len = pin_len; 8613 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 8614 } 8615 8616 /** 8617 * @brief Legacy Pairing Pin Code Response 8618 * @param addr 8619 * @param pin 8620 * @return 0 if ok 8621 */ 8622 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 8623 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, (uint8_t) strlen(pin)); 8624 } 8625 8626 /** 8627 * @brief Abort Legacy Pairing 8628 * @param addr 8629 * @param pin 8630 * @return 0 if ok 8631 */ 8632 int gap_pin_code_negative(bd_addr_t addr){ 8633 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8634 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 8635 } 8636 8637 /** 8638 * @brief SSP Passkey Response 8639 * @param addr 8640 * @param passkey 8641 * @return 0 if ok 8642 */ 8643 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 8644 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8645 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 8646 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 8647 } 8648 8649 /** 8650 * @brief Abort SSP Passkey Entry/Pairing 8651 * @param addr 8652 * @param pin 8653 * @return 0 if ok 8654 */ 8655 int gap_ssp_passkey_negative(const bd_addr_t addr){ 8656 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8657 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 8658 } 8659 8660 /** 8661 * @brief Accept SSP Numeric Comparison 8662 * @param addr 8663 * @param passkey 8664 * @return 0 if ok 8665 */ 8666 int gap_ssp_confirmation_response(const bd_addr_t addr){ 8667 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8668 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 8669 } 8670 8671 /** 8672 * @brief Abort SSP Numeric Comparison/Pairing 8673 * @param addr 8674 * @param pin 8675 * @return 0 if ok 8676 */ 8677 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 8678 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8679 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 8680 } 8681 8682 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 8683 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 8684 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8685 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8686 connectionSetAuthenticationFlags(conn, flag); 8687 hci_run(); 8688 return ERROR_CODE_SUCCESS; 8689 } 8690 #endif 8691 8692 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 8693 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 8694 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 8695 } 8696 8697 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 8698 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 8699 } 8700 #endif 8701 8702 #ifdef ENABLE_CLASSIC_PAIRING_OOB 8703 /** 8704 * @brief Report Remote OOB Data 8705 * @param bd_addr 8706 * @param c_192 Simple Pairing Hash C derived from P-192 public key 8707 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 8708 * @param c_256 Simple Pairing Hash C derived from P-256 public key 8709 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 8710 */ 8711 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){ 8712 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8713 if (connection == NULL) { 8714 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8715 } 8716 connection->classic_oob_c_192 = c_192; 8717 connection->classic_oob_r_192 = r_192; 8718 8719 // ignore P-256 if not supported by us 8720 if (hci_stack->secure_connections_active){ 8721 connection->classic_oob_c_256 = c_256; 8722 connection->classic_oob_r_256 = r_256; 8723 } 8724 8725 return ERROR_CODE_SUCCESS; 8726 } 8727 /** 8728 * @brief Generate new OOB data 8729 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 8730 */ 8731 void gap_ssp_generate_oob_data(void){ 8732 hci_stack->classic_read_local_oob_data = true; 8733 hci_run(); 8734 } 8735 8736 #endif 8737 8738 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 8739 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 8740 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8741 if (connection == NULL) { 8742 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8743 } 8744 8745 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 8746 connection->link_key_type = type; 8747 8748 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 8749 } 8750 8751 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 8752 /** 8753 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 8754 * @param inquiry_mode see bluetooth_defines.h 8755 */ 8756 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8757 hci_stack->inquiry_mode = inquiry_mode; 8758 } 8759 8760 /** 8761 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8762 */ 8763 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8764 hci_stack->sco_voice_setting = voice_setting; 8765 } 8766 8767 /** 8768 * @brief Get SCO Voice Setting 8769 * @return current voice setting 8770 */ 8771 uint16_t hci_get_sco_voice_setting(void){ 8772 return hci_stack->sco_voice_setting; 8773 } 8774 8775 static int hci_have_usb_transport(void){ 8776 if (!hci_stack->hci_transport) return 0; 8777 const char * transport_name = hci_stack->hci_transport->name; 8778 if (!transport_name) return 0; 8779 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8780 } 8781 8782 /** @brief Get SCO packet length for current SCO Voice setting 8783 * @note Using SCO packets of the exact length is required for USB transfer 8784 * @return Length of SCO packets in bytes (not audio frames) 8785 */ 8786 uint16_t hci_get_sco_packet_length(void){ 8787 uint16_t sco_packet_length = 0; 8788 8789 #ifdef ENABLE_SCO_OVER_HCI 8790 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8791 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8792 8793 if (hci_have_usb_transport()){ 8794 // see Core Spec for H2 USB Transfer. 8795 // 3 byte SCO header + 24 bytes per connection 8796 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8797 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8798 } else { 8799 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8800 sco_packet_length = 3 + 60 * multiplier; 8801 // assert that it still fits inside an SCO buffer 8802 if (sco_packet_length > (hci_stack->sco_data_packet_length + 3)){ 8803 sco_packet_length = 3 + 60; 8804 } 8805 } 8806 #endif 8807 8808 #ifdef HAVE_SCO_TRANSPORT 8809 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8810 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8811 sco_packet_length = 3 + 60 * multiplier; 8812 #endif 8813 return sco_packet_length; 8814 } 8815 8816 /** 8817 * @brief Sets the master/slave policy 8818 * @param policy (0: attempt to become master, 1: let connecting device decide) 8819 */ 8820 void hci_set_master_slave_policy(uint8_t policy){ 8821 hci_stack->master_slave_policy = policy; 8822 } 8823 8824 #endif 8825 8826 HCI_STATE hci_get_state(void){ 8827 return hci_stack->state; 8828 } 8829 8830 #ifdef ENABLE_CLASSIC 8831 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8832 hci_stack->gap_classic_accept_callback = accept_callback; 8833 } 8834 #endif 8835 8836 /** 8837 * @brief Set callback for Bluetooth Hardware Error 8838 */ 8839 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8840 hci_stack->hardware_error_callback = fn; 8841 } 8842 8843 void hci_disconnect_all(void){ 8844 btstack_linked_list_iterator_t it; 8845 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8846 while (btstack_linked_list_iterator_has_next(&it)){ 8847 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8848 if (con->state == SENT_DISCONNECT) continue; 8849 con->state = SEND_DISCONNECT; 8850 } 8851 hci_run(); 8852 } 8853 8854 uint16_t hci_get_manufacturer(void){ 8855 return hci_stack->manufacturer; 8856 } 8857 8858 #ifdef ENABLE_BLE 8859 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8860 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8861 if (!hci_con) return NULL; 8862 return &hci_con->sm_connection; 8863 } 8864 8865 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8866 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8867 #endif 8868 8869 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8870 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8871 if (hci_connection == NULL) return 0; 8872 if (hci_is_le_connection(hci_connection)){ 8873 #ifdef ENABLE_BLE 8874 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8875 if (sm_conn->sm_connection_encrypted) { 8876 return sm_conn->sm_actual_encryption_key_size; 8877 } 8878 #endif 8879 } else { 8880 #ifdef ENABLE_CLASSIC 8881 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8882 return hci_connection->encryption_key_size; 8883 } 8884 #endif 8885 } 8886 return 0; 8887 } 8888 8889 bool gap_authenticated(hci_con_handle_t con_handle){ 8890 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8891 if (hci_connection == NULL) return false; 8892 8893 switch (hci_connection->address_type){ 8894 #ifdef ENABLE_BLE 8895 case BD_ADDR_TYPE_LE_PUBLIC: 8896 case BD_ADDR_TYPE_LE_RANDOM: 8897 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8898 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8899 #endif 8900 #ifdef ENABLE_CLASSIC 8901 case BD_ADDR_TYPE_SCO: 8902 case BD_ADDR_TYPE_ACL: 8903 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8904 #endif 8905 default: 8906 return false; 8907 } 8908 } 8909 8910 bool gap_secure_connection(hci_con_handle_t con_handle){ 8911 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8912 if (hci_connection == NULL) return 0; 8913 8914 switch (hci_connection->address_type){ 8915 #ifdef ENABLE_BLE 8916 case BD_ADDR_TYPE_LE_PUBLIC: 8917 case BD_ADDR_TYPE_LE_RANDOM: 8918 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8919 return hci_connection->sm_connection.sm_connection_sc != 0; 8920 #endif 8921 #ifdef ENABLE_CLASSIC 8922 case BD_ADDR_TYPE_SCO: 8923 case BD_ADDR_TYPE_ACL: 8924 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8925 #endif 8926 default: 8927 return false; 8928 } 8929 } 8930 8931 bool gap_bonded(hci_con_handle_t con_handle){ 8932 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8933 if (hci_connection == NULL) return 0; 8934 8935 #ifdef ENABLE_CLASSIC 8936 link_key_t link_key; 8937 link_key_type_t link_key_type; 8938 #endif 8939 switch (hci_connection->address_type){ 8940 #ifdef ENABLE_BLE 8941 case BD_ADDR_TYPE_LE_PUBLIC: 8942 case BD_ADDR_TYPE_LE_RANDOM: 8943 return hci_connection->sm_connection.sm_le_db_index >= 0; 8944 #endif 8945 #ifdef ENABLE_CLASSIC 8946 case BD_ADDR_TYPE_SCO: 8947 case BD_ADDR_TYPE_ACL: 8948 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8949 #endif 8950 default: 8951 return false; 8952 } 8953 } 8954 8955 #ifdef ENABLE_BLE 8956 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8957 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8958 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8959 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8960 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8961 return sm_conn->sm_connection_authorization_state; 8962 } 8963 #endif 8964 8965 #ifdef ENABLE_CLASSIC 8966 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){ 8967 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8968 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8969 conn->sniff_min_interval = sniff_min_interval; 8970 conn->sniff_max_interval = sniff_max_interval; 8971 conn->sniff_attempt = sniff_attempt; 8972 conn->sniff_timeout = sniff_timeout; 8973 hci_run(); 8974 return 0; 8975 } 8976 8977 /** 8978 * @brief Exit Sniff mode 8979 * @param con_handle 8980 @ @return 0 if ok 8981 */ 8982 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8983 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8984 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8985 conn->sniff_min_interval = 0xffff; 8986 hci_run(); 8987 return 0; 8988 } 8989 8990 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){ 8991 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8992 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8993 conn->sniff_subrating_max_latency = max_latency; 8994 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8995 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8996 hci_run(); 8997 return ERROR_CODE_SUCCESS; 8998 } 8999 9000 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){ 9001 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9002 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9003 conn->qos_service_type = service_type; 9004 conn->qos_token_rate = token_rate; 9005 conn->qos_peak_bandwidth = peak_bandwidth; 9006 conn->qos_latency = latency; 9007 conn->qos_delay_variation = delay_variation; 9008 hci_run(); 9009 return ERROR_CODE_SUCCESS; 9010 } 9011 9012 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 9013 hci_stack->new_page_scan_interval = page_scan_interval; 9014 hci_stack->new_page_scan_window = page_scan_window; 9015 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 9016 hci_run(); 9017 } 9018 9019 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 9020 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 9021 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 9022 hci_run(); 9023 } 9024 9025 void gap_set_page_timeout(uint16_t page_timeout){ 9026 hci_stack->page_timeout = page_timeout; 9027 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 9028 hci_run(); 9029 } 9030 9031 #endif 9032 9033 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 9034 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 9035 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 9036 if (le_device_db_index >= le_device_db_max_count()) return; 9037 uint8_t offset = le_device_db_index >> 3; 9038 uint8_t mask = 1 << (le_device_db_index & 7); 9039 hci_stack->le_resolving_list_add_entries[offset] |= mask; 9040 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 9041 // note: go back to remove entries, otherwise, a remove + add will skip the add 9042 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 9043 } 9044 } 9045 9046 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 9047 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 9048 if (le_device_db_index >= le_device_db_max_count()) return; 9049 uint8_t offset = le_device_db_index >> 3; 9050 uint8_t mask = 1 << (le_device_db_index & 7); 9051 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 9052 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 9053 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 9054 } 9055 } 9056 9057 uint8_t gap_load_resolving_list_from_le_device_db(void){ 9058 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 9059 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 9060 } 9061 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 9062 // restart le resolving list update 9063 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 9064 } 9065 return ERROR_CODE_SUCCESS; 9066 } 9067 #endif 9068 9069 #ifdef ENABLE_BLE 9070 #ifdef ENABLE_LE_CENTRAL 9071 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 9072 9073 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9074 // check if already in list 9075 btstack_linked_list_iterator_t it; 9076 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9077 while (btstack_linked_list_iterator_has_next(&it)) { 9078 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 9079 if (entry->sid != advertising_sid) { 9080 continue; 9081 } 9082 if (entry->address_type != address_type) { 9083 continue; 9084 } 9085 if (memcmp(entry->address, address, 6) != 0) { 9086 continue; 9087 } 9088 // disallow if already scheduled to add 9089 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 9090 return ERROR_CODE_COMMAND_DISALLOWED; 9091 } 9092 // still on controller, but scheduled to remove -> re-add 9093 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 9094 return ERROR_CODE_SUCCESS; 9095 } 9096 // alloc and add to list 9097 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 9098 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 9099 entry->sid = advertising_sid; 9100 entry->address_type = address_type; 9101 (void)memcpy(entry->address, address, 6); 9102 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 9103 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 9104 return ERROR_CODE_SUCCESS; 9105 } 9106 9107 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9108 btstack_linked_list_iterator_t it; 9109 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9110 while (btstack_linked_list_iterator_has_next(&it)){ 9111 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 9112 if (entry->sid != advertising_sid) { 9113 continue; 9114 } 9115 if (entry->address_type != address_type) { 9116 continue; 9117 } 9118 if (memcmp(entry->address, address, 6) != 0) { 9119 continue; 9120 } 9121 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 9122 // remove from controller if already present 9123 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 9124 } else { 9125 // directly remove entry from whitelist 9126 btstack_linked_list_iterator_remove(&it); 9127 btstack_memory_periodic_advertiser_list_entry_free(entry); 9128 } 9129 return ERROR_CODE_SUCCESS; 9130 } 9131 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9132 } 9133 9134 static void hci_periodic_advertiser_list_clear(void){ 9135 btstack_linked_list_iterator_t it; 9136 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9137 while (btstack_linked_list_iterator_has_next(&it)){ 9138 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 9139 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 9140 // remove from controller if already present 9141 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 9142 continue; 9143 } 9144 // directly remove entry from whitelist 9145 btstack_linked_list_iterator_remove(&it); 9146 btstack_memory_periodic_advertiser_list_entry_free(entry); 9147 } 9148 } 9149 9150 // free all entries unconditionally 9151 static void hci_periodic_advertiser_list_free(void){ 9152 btstack_linked_list_iterator_t lit; 9153 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 9154 while (btstack_linked_list_iterator_has_next(&lit)){ 9155 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 9156 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 9157 btstack_memory_periodic_advertiser_list_entry_free(entry); 9158 } 9159 } 9160 9161 uint8_t gap_periodic_advertiser_list_clear(void){ 9162 hci_periodic_advertiser_list_clear(); 9163 hci_run(); 9164 return ERROR_CODE_SUCCESS; 9165 } 9166 9167 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9168 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 9169 if (status){ 9170 return status; 9171 } 9172 hci_run(); 9173 return ERROR_CODE_SUCCESS; 9174 } 9175 9176 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9177 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 9178 if (status){ 9179 return status; 9180 } 9181 hci_run(); 9182 return ERROR_CODE_SUCCESS; 9183 } 9184 9185 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 9186 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 9187 // abort if already active 9188 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 9189 return ERROR_CODE_COMMAND_DISALLOWED; 9190 } 9191 // store request 9192 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 9193 hci_stack->le_periodic_sync_options = options; 9194 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 9195 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 9196 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 9197 hci_stack->le_periodic_sync_skip = skip; 9198 hci_stack->le_periodic_sync_timeout = sync_timeout; 9199 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 9200 9201 hci_run(); 9202 return ERROR_CODE_SUCCESS; 9203 } 9204 9205 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 9206 // abort if not requested 9207 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 9208 return ERROR_CODE_COMMAND_DISALLOWED; 9209 } 9210 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 9211 hci_run(); 9212 return ERROR_CODE_SUCCESS; 9213 } 9214 9215 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 9216 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 9217 return ERROR_CODE_COMMAND_DISALLOWED; 9218 } 9219 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 9220 hci_run(); 9221 return ERROR_CODE_SUCCESS; 9222 } 9223 9224 #endif 9225 #endif 9226 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 9227 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id, 9228 hci_iso_stream_state_t state) { 9229 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 9230 if (iso_stream == NULL){ 9231 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 9232 } else { 9233 iso_stream->iso_type = iso_type; 9234 iso_stream->state = state; 9235 iso_stream->con_handle = con_handle; 9236 iso_stream->group_id = group_id; 9237 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 9238 return ERROR_CODE_SUCCESS; 9239 } 9240 } 9241 9242 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle){ 9243 btstack_linked_list_iterator_t it; 9244 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9245 while (btstack_linked_list_iterator_has_next(&it)){ 9246 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9247 if (iso_stream->con_handle == con_handle ) { 9248 return iso_stream; 9249 } 9250 } 9251 return NULL; 9252 } 9253 9254 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 9255 log_info("hci_iso_stream_finalize con_handle 0x%04x, group_id 0x%02x", iso_stream->con_handle, iso_stream->group_id); 9256 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 9257 btstack_memory_hci_iso_stream_free(iso_stream); 9258 } 9259 9260 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id) { 9261 btstack_linked_list_iterator_t it; 9262 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9263 while (btstack_linked_list_iterator_has_next(&it)){ 9264 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9265 if ((iso_stream->group_id == group_id) && 9266 (iso_stream->iso_type == iso_type)){ 9267 btstack_linked_list_iterator_remove(&it); 9268 btstack_memory_hci_iso_stream_free(iso_stream); 9269 } 9270 } 9271 } 9272 9273 static void hci_iso_stream_requested_finalize(uint8_t group_id) { 9274 btstack_linked_list_iterator_t it; 9275 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9276 while (btstack_linked_list_iterator_has_next(&it)){ 9277 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9278 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 9279 (iso_stream->group_id == group_id)){ 9280 btstack_linked_list_iterator_remove(&it); 9281 btstack_memory_hci_iso_stream_free(iso_stream); 9282 } 9283 } 9284 } 9285 static void hci_iso_stream_requested_confirm(uint8_t big_handle){ 9286 btstack_linked_list_iterator_t it; 9287 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9288 while (btstack_linked_list_iterator_has_next(&it)){ 9289 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9290 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 9291 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 9292 } 9293 } 9294 } 9295 9296 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 9297 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 9298 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 9299 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 9300 return (sdu_len_offset + 2 + sdu_len) == size; 9301 } 9302 9303 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 9304 if (hci_stack->iso_packet_handler == NULL) { 9305 return; 9306 } 9307 if (size < 4) { 9308 return; 9309 } 9310 9311 // parse header 9312 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 9313 uint16_t iso_data_len = little_endian_read_16(packet, 2); 9314 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 9315 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_handle); 9316 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 9317 9318 // assert packet is complete 9319 if ((iso_data_len + 4u) != size){ 9320 return; 9321 } 9322 9323 if ((pb_flag & 0x01) == 0){ 9324 if (pb_flag == 0x02){ 9325 // The ISO_Data_Load field contains a header and a complete SDU. 9326 if (hci_iso_sdu_complete(packet, size)) { 9327 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 9328 } 9329 } else { 9330 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 9331 if (iso_stream == NULL){ 9332 return; 9333 } 9334 if (size > HCI_ISO_PAYLOAD_SIZE){ 9335 return; 9336 } 9337 memcpy(iso_stream->reassembly_buffer, packet, size); 9338 // fix pb_flag 9339 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 9340 iso_stream->reassembly_pos = size; 9341 } 9342 } else { 9343 // iso_data_load contains continuation or last fragment of an SDU 9344 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 9345 if (ts_flag != 0){ 9346 return; 9347 } 9348 // append fragment 9349 if (iso_stream == NULL){ 9350 return; 9351 } 9352 if (iso_stream->reassembly_pos == 0){ 9353 return; 9354 } 9355 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 9356 // reset reassembly buffer 9357 iso_stream->reassembly_pos = 0; 9358 return; 9359 } 9360 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 9361 iso_stream->reassembly_pos += iso_data_len; 9362 9363 // deliver if last fragment and SDU complete 9364 if (pb_flag == 0x03){ 9365 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 9366 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 9367 } 9368 iso_stream->reassembly_pos = 0; 9369 } 9370 } 9371 } 9372 9373 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status){ 9374 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9375 uint16_t pos = 0; 9376 event[pos++] = HCI_EVENT_META_GAP; 9377 event[pos++] = 4 + (2 * big->num_bis); 9378 event[pos++] = GAP_SUBEVENT_BIG_CREATED; 9379 event[pos++] = status; 9380 event[pos++] = big->big_handle; 9381 event[pos++] = big->num_bis; 9382 uint8_t i; 9383 for (i=0;i<big->num_bis;i++){ 9384 little_endian_store_16(event, pos, big->bis_con_handles[i]); 9385 pos += 2; 9386 } 9387 hci_emit_event(event, pos, 0); 9388 } 9389 9390 static void hci_emit_cig_created(const le_audio_cig_t * cig, uint8_t status){ 9391 uint8_t event [6 + (MAX_NR_CIS * 2)]; 9392 uint16_t pos = 0; 9393 event[pos++] = HCI_EVENT_META_GAP; 9394 event[pos++] = 4 + (2 * cig->num_cis); 9395 event[pos++] = GAP_SUBEVENT_CIG_CREATED; 9396 event[pos++] = status; 9397 event[pos++] = cig->cig_id; 9398 event[pos++] = cig->num_cis; 9399 uint8_t i; 9400 for (i=0;i<cig->num_cis;i++){ 9401 little_endian_store_16(event, pos, cig->cis_con_handles[i]); 9402 pos += 2; 9403 } 9404 hci_emit_event(event, pos, 0); 9405 } 9406 9407 static void 9408 hci_emit_cis_created(uint8_t cig_id, hci_con_handle_t cis_con_handle, uint8_t status) { 9409 uint8_t event [7]; 9410 uint16_t pos = 0; 9411 event[pos++] = HCI_EVENT_META_GAP; 9412 event[pos++] = 5; 9413 event[pos++] = GAP_SUBEVENT_CIS_CREATED; 9414 event[pos++] = status; 9415 event[pos++] = cig_id; 9416 little_endian_store_16(event, pos, cis_con_handle); 9417 pos += 2; 9418 hci_emit_event(event, pos, 0); 9419 } 9420 9421 static void hci_emit_big_terminated(const le_audio_big_t * big){ 9422 uint8_t event [4]; 9423 uint16_t pos = 0; 9424 event[pos++] = HCI_EVENT_META_GAP; 9425 event[pos++] = 2; 9426 event[pos++] = GAP_SUBEVENT_BIG_TERMINATED; 9427 event[pos++] = big->big_handle; 9428 hci_emit_event(event, pos, 0); 9429 } 9430 9431 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status){ 9432 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9433 uint16_t pos = 0; 9434 event[pos++] = HCI_EVENT_META_GAP; 9435 event[pos++] = 4; 9436 event[pos++] = GAP_SUBEVENT_BIG_SYNC_CREATED; 9437 event[pos++] = status; 9438 event[pos++] = big_sync->big_handle; 9439 event[pos++] = big_sync->num_bis; 9440 uint8_t i; 9441 for (i=0;i<big_sync->num_bis;i++){ 9442 little_endian_store_16(event, pos, big_sync->bis_con_handles[i]); 9443 pos += 2; 9444 } 9445 hci_emit_event(event, pos, 0); 9446 } 9447 9448 static void hci_emit_big_sync_stopped(uint8_t big_handle){ 9449 uint8_t event [4]; 9450 uint16_t pos = 0; 9451 event[pos++] = HCI_EVENT_META_GAP; 9452 event[pos++] = 2; 9453 event[pos++] = GAP_SUBEVENT_BIG_SYNC_STOPPED; 9454 event[pos++] = big_handle; 9455 hci_emit_event(event, pos, 0); 9456 } 9457 9458 static void hci_emit_bis_can_send_now(const le_audio_big_t *big, uint8_t bis_index) { 9459 uint8_t event[6]; 9460 uint16_t pos = 0; 9461 event[pos++] = HCI_EVENT_BIS_CAN_SEND_NOW; 9462 event[pos++] = sizeof(event) - 2; 9463 event[pos++] = big->big_handle; 9464 event[pos++] = bis_index; 9465 little_endian_store_16(event, pos, big->bis_con_handles[bis_index]); 9466 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9467 } 9468 9469 static void hci_emit_cis_can_send_now(hci_con_handle_t cis_con_handle) { 9470 uint8_t event[4]; 9471 uint16_t pos = 0; 9472 event[pos++] = HCI_EVENT_CIS_CAN_SEND_NOW; 9473 event[pos++] = sizeof(event) - 2; 9474 little_endian_store_16(event, pos, cis_con_handle); 9475 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9476 } 9477 9478 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle){ 9479 btstack_linked_list_iterator_t it; 9480 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9481 while (btstack_linked_list_iterator_has_next(&it)){ 9482 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9483 if ( big->big_handle == big_handle ) { 9484 return big; 9485 } 9486 } 9487 return NULL; 9488 } 9489 9490 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle){ 9491 btstack_linked_list_iterator_t it; 9492 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 9493 while (btstack_linked_list_iterator_has_next(&it)){ 9494 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 9495 if ( big_sync->big_handle == big_handle ) { 9496 return big_sync; 9497 } 9498 } 9499 return NULL; 9500 } 9501 9502 void hci_set_num_iso_packets_to_queue(uint8_t num_packets){ 9503 hci_stack->iso_packets_to_queue = num_packets; 9504 } 9505 9506 static le_audio_cig_t * hci_cig_for_id(uint8_t cig_id){ 9507 btstack_linked_list_iterator_t it; 9508 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_cigs); 9509 while (btstack_linked_list_iterator_has_next(&it)){ 9510 le_audio_cig_t * cig = (le_audio_cig_t *) btstack_linked_list_iterator_next(&it); 9511 if ( cig->cig_id == cig_id ) { 9512 return cig; 9513 } 9514 } 9515 return NULL; 9516 } 9517 9518 static void hci_iso_notify_can_send_now(void){ 9519 9520 // BIG 9521 9522 btstack_linked_list_iterator_t it; 9523 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9524 while (btstack_linked_list_iterator_has_next(&it)){ 9525 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9526 // track number completed packet timestamps 9527 if (big->num_completed_timestamp_current_valid){ 9528 big->num_completed_timestamp_current_valid = false; 9529 if (big->num_completed_timestamp_previous_valid){ 9530 // detect delayed sending of all BIS: tolerate up to 50% delayed event handling 9531 uint32_t iso_interval_missed_threshold_ms = big->params->sdu_interval_us * 3 / 2000; 9532 int32_t num_completed_timestamp_delta_ms = btstack_time_delta(big->num_completed_timestamp_current_ms, 9533 big->num_completed_timestamp_previous_ms); 9534 if (num_completed_timestamp_delta_ms > iso_interval_missed_threshold_ms){ 9535 // to catch up, skip packet on all BIS 9536 uint8_t i; 9537 for (i=0;i<big->num_bis;i++){ 9538 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9539 if (iso_stream){ 9540 iso_stream->num_packets_to_skip++; 9541 } 9542 } 9543 } 9544 } 9545 big->num_completed_timestamp_previous_valid = true; 9546 big->num_completed_timestamp_previous_ms = big->num_completed_timestamp_current_ms; 9547 } 9548 9549 if (big->can_send_now_requested){ 9550 // check if no outgoing iso packets pending and no can send now have to be emitted 9551 uint8_t i; 9552 bool can_send = true; 9553 uint8_t num_iso_queued_minimum = 0; 9554 for (i=0;i<big->num_bis;i++){ 9555 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9556 if (iso_stream == NULL) continue; 9557 // handle case where individual ISO packet was sent too late: 9558 // for each additionally queued packet, a new one needs to get skipped 9559 if (i==0){ 9560 num_iso_queued_minimum = iso_stream->num_packets_sent; 9561 } else if (iso_stream->num_packets_sent > num_iso_queued_minimum){ 9562 uint8_t num_packets_to_skip = iso_stream->num_packets_sent - num_iso_queued_minimum; 9563 iso_stream->num_packets_to_skip += num_packets_to_skip; 9564 iso_stream->num_packets_sent -= num_packets_to_skip; 9565 } 9566 // check if we can send now 9567 if ((iso_stream->num_packets_sent >= hci_stack->iso_packets_to_queue) || (iso_stream->emit_ready_to_send)){ 9568 can_send = false; 9569 break; 9570 } 9571 } 9572 if (can_send){ 9573 // propagate can send now to individual streams 9574 big->can_send_now_requested = false; 9575 for (i=0;i<big->num_bis;i++){ 9576 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9577 iso_stream->emit_ready_to_send = true; 9578 } 9579 } 9580 } 9581 } 9582 9583 if (hci_stack->hci_packet_buffer_reserved) return; 9584 9585 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9586 while (btstack_linked_list_iterator_has_next(&it)){ 9587 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9588 // report bis ready 9589 uint8_t i; 9590 for (i=0;i<big->num_bis;i++){ 9591 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9592 if ((iso_stream != NULL) && iso_stream->emit_ready_to_send){ 9593 iso_stream->emit_ready_to_send = false; 9594 hci_emit_bis_can_send_now(big, i); 9595 break; 9596 } 9597 } 9598 } 9599 9600 // CIS 9601 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9602 while (btstack_linked_list_iterator_has_next(&it)) { 9603 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9604 if ((iso_stream->can_send_now_requested) && 9605 (iso_stream->num_packets_sent < hci_stack->iso_packets_to_queue)){ 9606 iso_stream->can_send_now_requested = false; 9607 hci_emit_cis_can_send_now(iso_stream->con_handle); 9608 } 9609 } 9610 } 9611 9612 uint8_t gap_big_create(le_audio_big_t * storage, le_audio_big_params_t * big_params){ 9613 if (hci_big_for_handle(big_params->big_handle) != NULL){ 9614 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9615 } 9616 if (big_params->num_bis == 0){ 9617 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9618 } 9619 if (big_params->num_bis > MAX_NR_BIS){ 9620 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9621 } 9622 9623 // reserve ISO Streams 9624 uint8_t i; 9625 uint8_t status = ERROR_CODE_SUCCESS; 9626 for (i=0;i<big_params->num_bis;i++){ 9627 status = hci_iso_stream_create(HCI_ISO_TYPE_BIS, HCI_CON_HANDLE_INVALID, big_params->big_handle, 9628 HCI_ISO_STREAM_STATE_REQUESTED); 9629 if (status != ERROR_CODE_SUCCESS) { 9630 break; 9631 } 9632 } 9633 9634 // free structs on error 9635 if (status != ERROR_CODE_SUCCESS){ 9636 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big_params->big_handle); 9637 return status; 9638 } 9639 9640 le_audio_big_t * big = storage; 9641 big->big_handle = big_params->big_handle; 9642 big->params = big_params; 9643 big->state = LE_AUDIO_BIG_STATE_CREATE; 9644 big->num_bis = big_params->num_bis; 9645 btstack_linked_list_add(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9646 9647 hci_run(); 9648 9649 return ERROR_CODE_SUCCESS; 9650 } 9651 9652 uint8_t gap_big_sync_create(le_audio_big_sync_t * storage, le_audio_big_sync_params_t * big_sync_params){ 9653 if (hci_big_sync_for_handle(big_sync_params->big_handle) != NULL){ 9654 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9655 } 9656 if (big_sync_params->num_bis == 0){ 9657 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9658 } 9659 if (big_sync_params->num_bis > MAX_NR_BIS){ 9660 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9661 } 9662 9663 le_audio_big_sync_t * big_sync = storage; 9664 big_sync->big_handle = big_sync_params->big_handle; 9665 big_sync->params = big_sync_params; 9666 big_sync->state = LE_AUDIO_BIG_STATE_CREATE; 9667 big_sync->num_bis = big_sync_params->num_bis; 9668 btstack_linked_list_add(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9669 9670 hci_run(); 9671 9672 return ERROR_CODE_SUCCESS; 9673 } 9674 9675 uint8_t gap_big_terminate(uint8_t big_handle){ 9676 le_audio_big_t * big = hci_big_for_handle(big_handle); 9677 if (big == NULL){ 9678 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9679 } 9680 switch (big->state){ 9681 case LE_AUDIO_BIG_STATE_CREATE: 9682 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9683 hci_emit_big_terminated(big); 9684 break; 9685 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9686 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9687 break; 9688 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9689 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9690 case LE_AUDIO_BIG_STATE_ACTIVE: 9691 big->state = LE_AUDIO_BIG_STATE_TERMINATE; 9692 hci_run(); 9693 break; 9694 default: 9695 return ERROR_CODE_COMMAND_DISALLOWED; 9696 } 9697 return ERROR_CODE_SUCCESS; 9698 } 9699 9700 uint8_t gap_big_sync_terminate(uint8_t big_handle){ 9701 le_audio_big_sync_t * big_sync = hci_big_sync_for_handle(big_handle); 9702 if (big_sync == NULL){ 9703 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9704 } 9705 switch (big_sync->state){ 9706 case LE_AUDIO_BIG_STATE_CREATE: 9707 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9708 hci_emit_big_sync_stopped(big_handle); 9709 break; 9710 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9711 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9712 break; 9713 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9714 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9715 case LE_AUDIO_BIG_STATE_ACTIVE: 9716 big_sync->state = LE_AUDIO_BIG_STATE_TERMINATE; 9717 hci_run(); 9718 break; 9719 default: 9720 return ERROR_CODE_COMMAND_DISALLOWED; 9721 } 9722 return ERROR_CODE_SUCCESS; 9723 } 9724 9725 uint8_t hci_request_bis_can_send_now_events(uint8_t big_handle){ 9726 le_audio_big_t * big = hci_big_for_handle(big_handle); 9727 if (big == NULL){ 9728 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9729 } 9730 if (big->state != LE_AUDIO_BIG_STATE_ACTIVE){ 9731 return ERROR_CODE_COMMAND_DISALLOWED; 9732 } 9733 big->can_send_now_requested = true; 9734 hci_iso_notify_can_send_now(); 9735 return ERROR_CODE_SUCCESS; 9736 } 9737 9738 uint8_t hci_request_cis_can_send_now_events(hci_con_handle_t cis_con_handle){ 9739 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_con_handle); 9740 if (iso_stream == NULL){ 9741 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9742 } 9743 if ((iso_stream->iso_type != HCI_ISO_TYPE_CIS) && (iso_stream->state != HCI_ISO_STREAM_STATE_ESTABLISHED)) { 9744 return ERROR_CODE_COMMAND_DISALLOWED; 9745 } 9746 iso_stream->can_send_now_requested = true; 9747 hci_iso_notify_can_send_now(); 9748 return ERROR_CODE_SUCCESS; 9749 } 9750 9751 uint8_t gap_cig_create(le_audio_cig_t * storage, le_audio_cig_params_t * cig_params){ 9752 if (hci_cig_for_id(cig_params->cig_id) != NULL){ 9753 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9754 } 9755 if (cig_params->num_cis == 0){ 9756 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9757 } 9758 if (cig_params->num_cis > MAX_NR_BIS){ 9759 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9760 } 9761 9762 // reserve ISO Streams 9763 uint8_t i; 9764 uint8_t status = ERROR_CODE_SUCCESS; 9765 for (i=0;i<cig_params->num_cis;i++){ 9766 status = hci_iso_stream_create(HCI_ISO_TYPE_CIS, HCI_CON_HANDLE_INVALID, cig_params->cig_id, 9767 HCI_ISO_STREAM_STATE_REQUESTED); 9768 if (status != ERROR_CODE_SUCCESS) { 9769 break; 9770 } 9771 } 9772 9773 // free structs on error 9774 if (status != ERROR_CODE_SUCCESS){ 9775 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_CIS, cig_params->cig_id); 9776 return status; 9777 } 9778 9779 le_audio_cig_t * cig = storage; 9780 cig->cig_id = cig_params->cig_id; 9781 cig->num_cis = cig_params->num_cis; 9782 cig->params = cig_params; 9783 cig->state = LE_AUDIO_CIG_STATE_CREATE; 9784 for (i=0;i<cig->num_cis;i++){ 9785 cig->cis_con_handles[i] = HCI_CON_HANDLE_INVALID; 9786 cig->acl_con_handles[i] = HCI_CON_HANDLE_INVALID; 9787 } 9788 btstack_linked_list_add(&hci_stack->le_audio_cigs, (btstack_linked_item_t *) cig); 9789 9790 hci_run(); 9791 9792 return ERROR_CODE_SUCCESS; 9793 } 9794 9795 uint8_t gap_cis_create(uint8_t cig_handle, hci_con_handle_t cis_con_handles [], hci_con_handle_t acl_con_handles []){ 9796 le_audio_cig_t * cig = hci_cig_for_id(cig_handle); 9797 if (cig == NULL){ 9798 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9799 } 9800 9801 if (cig->state != LE_AUDIO_CIG_STATE_W4_CIS_REQUEST){ 9802 return ERROR_CODE_COMMAND_DISALLOWED; 9803 } 9804 9805 // store ACL Connection Handles 9806 uint8_t i; 9807 for (i=0;i<cig->num_cis;i++){ 9808 // check that all con handles exit 9809 hci_con_handle_t cis_handle = cis_con_handles[i]; 9810 uint8_t j; 9811 bool found = false; 9812 for (j=0;j<cig->num_cis;j++){ 9813 if (cig->cis_con_handles[j] == cis_handle){ 9814 cig->acl_con_handles[j] = acl_con_handles[j]; 9815 found = true; 9816 break; 9817 } 9818 } 9819 if (!found){ 9820 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9821 } 9822 } 9823 9824 cig->state = LE_AUDIO_CIG_STATE_CREATE_CIS; 9825 hci_run(); 9826 9827 return ERROR_CODE_SUCCESS; 9828 } 9829 9830 static uint8_t hci_cis_accept_or_reject(hci_con_handle_t cis_con_handle, hci_iso_stream_state_t state){ 9831 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_con_handle); 9832 if (iso_stream != NULL){ 9833 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9834 } 9835 9836 uint8_t status = hci_iso_stream_create(HCI_ISO_TYPE_CIS, cis_con_handle, 9837 HCI_ISO_GROUP_ID_INVALID, state); 9838 if (status == ERROR_CODE_SUCCESS){ 9839 return status; 9840 } 9841 9842 hci_run(); 9843 return ERROR_CODE_SUCCESS; 9844 } 9845 9846 uint8_t gap_cis_accept(hci_con_handle_t cis_con_handle){ 9847 return hci_cis_accept_or_reject(cis_con_handle, HCI_ISO_STREAM_W2_ACCEPT); 9848 } 9849 9850 uint8_t gap_cis_reject(hci_con_handle_t cis_con_handle){ 9851 return hci_cis_accept_or_reject(cis_con_handle, HCI_ISO_STREAM_W2_REJECT); 9852 } 9853 9854 9855 #endif 9856 #endif /* ENABLE_BLE */ 9857 9858 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 9859 void hci_setup_test_connections_fuzz(void){ 9860 hci_connection_t * conn; 9861 9862 // default address: 66:55:44:33:00:01 9863 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 9864 9865 // setup Controller info 9866 hci_stack->num_cmd_packets = 255; 9867 hci_stack->acl_packets_total_num = 255; 9868 9869 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 9870 addr[5] = 0x01; 9871 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9872 conn->con_handle = addr[5]; 9873 conn->role = HCI_ROLE_SLAVE; 9874 conn->state = RECEIVED_CONNECTION_REQUEST; 9875 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9876 9877 // setup incoming Classic SCO connection with con handle 0x0002 9878 addr[5] = 0x02; 9879 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9880 conn->con_handle = addr[5]; 9881 conn->role = HCI_ROLE_SLAVE; 9882 conn->state = RECEIVED_CONNECTION_REQUEST; 9883 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9884 9885 // setup ready Classic ACL connection with con handle 0x0003 9886 addr[5] = 0x03; 9887 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9888 conn->con_handle = addr[5]; 9889 conn->role = HCI_ROLE_SLAVE; 9890 conn->state = OPEN; 9891 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9892 9893 // setup ready Classic SCO connection with con handle 0x0004 9894 addr[5] = 0x04; 9895 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9896 conn->con_handle = addr[5]; 9897 conn->role = HCI_ROLE_SLAVE; 9898 conn->state = OPEN; 9899 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9900 9901 // setup ready LE ACL connection with con handle 0x005 and public address 9902 addr[5] = 0x05; 9903 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 9904 conn->con_handle = addr[5]; 9905 conn->role = HCI_ROLE_SLAVE; 9906 conn->state = OPEN; 9907 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9908 conn->sm_connection.sm_connection_encrypted = 1; 9909 } 9910 9911 void hci_free_connections_fuzz(void){ 9912 btstack_linked_list_iterator_t it; 9913 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 9914 while (btstack_linked_list_iterator_has_next(&it)){ 9915 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 9916 btstack_linked_list_iterator_remove(&it); 9917 btstack_memory_hci_connection_free(con); 9918 } 9919 } 9920 void hci_simulate_working_fuzz(void){ 9921 hci_stack->le_scanning_param_update = false; 9922 hci_init_done(); 9923 hci_stack->num_cmd_packets = 255; 9924 } 9925 #endif 9926