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 #ifndef MAX_NR_CONTROLLER_ACL_BUFFERS 97 #define MAX_NR_CONTROLLER_ACL_BUFFERS 255 98 #endif 99 #ifndef MAX_NR_CONTROLLER_SCO_PACKETS 100 #define MAX_NR_CONTROLLER_SCO_PACKETS 255 101 #endif 102 103 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 104 #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." 105 #endif 106 107 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 108 #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." 109 #endif 110 111 #define HCI_CONNECTION_TIMEOUT_MS 10000 112 113 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 114 #define HCI_RESET_RESEND_TIMEOUT_MS 200 115 #endif 116 117 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 118 #ifndef GAP_INQUIRY_MAX_NAME_LEN 119 #define GAP_INQUIRY_MAX_NAME_LEN 32 120 #endif 121 122 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 123 #define GAP_INQUIRY_DURATION_MIN 0x01 124 #define GAP_INQUIRY_DURATION_MAX 0x30 125 #define GAP_INQUIRY_MIN_PERIODIC_LEN_MIN 0x02 126 #define GAP_INQUIRY_MAX_PERIODIC_LEN_MIN 0x03 127 #define GAP_INQUIRY_STATE_IDLE 0x00 128 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 129 #define GAP_INQUIRY_STATE_ACTIVE 0x81 130 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 131 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 132 #define GAP_INQUIRY_STATE_PERIODIC 0x84 133 #define GAP_INQUIRY_STATE_W2_EXIT_PERIODIC 0x85 134 135 // GAP Remote Name Request 136 #define GAP_REMOTE_NAME_STATE_IDLE 0 137 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 138 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 139 140 // GAP Pairing 141 #define GAP_PAIRING_STATE_IDLE 0 142 #define GAP_PAIRING_STATE_SEND_PIN 1 143 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 144 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 145 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 146 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 147 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 148 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 149 150 // 151 // compact storage of relevant supported HCI Commands. 152 // X-Macro below provides enumeration and mapping table into the supported 153 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 154 // 155 156 // format: command name, byte offset, bit nr in 64-byte supported commands 157 // currently stored in 32-bit variable 158 #define SUPPORTED_HCI_COMMANDS \ 159 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 160 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 161 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 162 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 163 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 164 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 165 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 166 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 167 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 168 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 169 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 170 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 171 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 172 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 173 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 174 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 175 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 176 177 // enumerate supported commands 178 #define X(name, offset, bit) name, 179 enum { 180 SUPPORTED_HCI_COMMANDS 181 SUPPORTED_HCI_COMMANDS_COUNT 182 }; 183 #undef X 184 185 // prototypes 186 #ifdef ENABLE_CLASSIC 187 static void hci_update_scan_enable(void); 188 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable); 189 static int hci_local_ssp_activated(void); 190 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 191 static bool hci_ssp_supported(hci_connection_t * connection); 192 static void hci_notify_if_sco_can_send_now(void); 193 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 194 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 195 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 196 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 197 static void hci_connection_timestamp(hci_connection_t *connection); 198 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 199 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 200 #endif 201 202 static int hci_power_control_on(void); 203 static void hci_power_control_off(void); 204 static void hci_state_reset(void); 205 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 206 static void hci_emit_transport_packet_sent(void); 207 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 208 static void hci_emit_nr_connections_changed(void); 209 static void hci_emit_hci_open_failed(void); 210 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 211 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 212 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 213 static void hci_run(void); 214 static int hci_is_le_connection(hci_connection_t * connection); 215 216 #ifdef ENABLE_CLASSIC 217 static int hci_have_usb_transport(void); 218 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 219 #endif 220 221 #ifdef ENABLE_BLE 222 #ifdef ENABLE_LE_CENTRAL 223 // called from test/ble_client/advertising_data_parser.c 224 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 225 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 226 static hci_connection_t * gap_get_outgoing_connection(void); 227 static void hci_le_scan_stop(void); 228 static bool hci_run_general_gap_le(void); 229 #endif 230 #ifdef ENABLE_LE_PERIPHERAL 231 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 232 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 233 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 234 #endif /* ENABLE_LE_PERIPHERAL */ 235 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 236 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id, 237 hci_iso_stream_state_t state); 238 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream); 239 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id); 240 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle); 241 static void hci_iso_stream_requested_finalize(uint8_t big_handle); 242 static void hci_iso_stream_requested_confirm(uint8_t big_handle); 243 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size); 244 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle); 245 static le_audio_cig_t * hci_cig_for_id(uint8_t cig_id); 246 static void hci_iso_notify_can_send_now(void); 247 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status); 248 static void hci_emit_big_terminated(const le_audio_big_t * big); 249 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status); 250 static void hci_emit_big_sync_stopped(uint8_t big_handle); 251 static void hci_emit_cig_created(const le_audio_cig_t * cig, uint8_t status); 252 static void 253 hci_emit_cis_created(uint8_t cig_id, hci_con_handle_t cis_con_handle, uint8_t status); 254 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle); 255 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 256 #endif /* ENABLE_BLE */ 257 258 // the STACK is here 259 #ifndef HAVE_MALLOC 260 static hci_stack_t hci_stack_static; 261 #endif 262 static hci_stack_t * hci_stack = NULL; 263 264 #ifdef ENABLE_CLASSIC 265 // default name 266 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 267 268 // test helper 269 static uint8_t disable_l2cap_timeouts = 0; 270 #endif 271 272 static bool btstack_is_null(uint8_t * data, uint16_t size){ 273 uint16_t i; 274 for (i=0; i < size ; i++){ 275 if (data[i] != 0) { 276 return false; 277 } 278 } 279 return true; 280 } 281 282 // reset connection state on create and on reconnect 283 // don't overwrite addr, con handle, role 284 static void hci_connection_init(hci_connection_t * conn){ 285 conn->authentication_flags = AUTH_FLAG_NONE; 286 conn->bonding_flags = 0; 287 conn->requested_security_level = LEVEL_0; 288 #ifdef ENABLE_CLASSIC 289 conn->request_role = HCI_ROLE_INVALID; 290 conn->sniff_subrating_max_latency = 0xffff; 291 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 292 conn->link_key_type = INVALID_LINK_KEY; 293 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 294 btstack_run_loop_set_timer_context(&conn->timeout, conn); 295 hci_connection_timestamp(conn); 296 #endif 297 conn->acl_recombination_length = 0; 298 conn->acl_recombination_pos = 0; 299 conn->num_packets_sent = 0; 300 301 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 302 #ifdef ENABLE_BLE 303 conn->le_phy_update_all_phys = 0xff; 304 #endif 305 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 306 conn->le_max_tx_octets = 27; 307 #endif 308 #ifdef ENABLE_CLASSIC_PAIRING_OOB 309 conn->classic_oob_c_192 = NULL; 310 conn->classic_oob_r_192 = NULL; 311 conn->classic_oob_c_256 = NULL; 312 conn->classic_oob_r_256 = NULL; 313 #endif 314 } 315 316 /** 317 * create connection for given address 318 * 319 * @return connection OR NULL, if no memory left 320 */ 321 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 322 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 323 324 hci_connection_t * conn = btstack_memory_hci_connection_get(); 325 if (!conn) return NULL; 326 hci_connection_init(conn); 327 328 bd_addr_copy(conn->address, addr); 329 conn->address_type = addr_type; 330 conn->con_handle = HCI_CON_HANDLE_INVALID; 331 conn->role = HCI_ROLE_INVALID; 332 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 333 conn->le_past_sync_handle = HCI_CON_HANDLE_INVALID; 334 #endif 335 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 336 337 return conn; 338 } 339 340 341 /** 342 * get le connection parameter range 343 * 344 * @return le connection parameter range struct 345 */ 346 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 347 *range = hci_stack->le_connection_parameter_range; 348 } 349 350 /** 351 * set le connection parameter range 352 * 353 */ 354 355 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 356 hci_stack->le_connection_parameter_range = *range; 357 } 358 359 /** 360 * @brief Test if connection parameters are inside in existing rage 361 * @param conn_interval_min (unit: 1.25ms) 362 * @param conn_interval_max (unit: 1.25ms) 363 * @param conn_latency 364 * @param supervision_timeout (unit: 10ms) 365 * @return 1 if included 366 */ 367 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){ 368 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 369 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 370 371 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 372 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 373 374 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 375 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 376 377 return 1; 378 } 379 380 /** 381 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 382 * @note: default: 1 383 * @param max_peripheral_connections 384 */ 385 #ifdef ENABLE_LE_PERIPHERAL 386 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 387 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 388 } 389 #endif 390 391 /** 392 * get hci connections iterator 393 * 394 * @return hci connections iterator 395 */ 396 397 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 398 btstack_linked_list_iterator_init(it, &hci_stack->connections); 399 } 400 401 /** 402 * get connection for a given handle 403 * 404 * @return connection OR NULL, if not found 405 */ 406 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 407 btstack_linked_list_iterator_t it; 408 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 409 while (btstack_linked_list_iterator_has_next(&it)){ 410 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 411 if ( item->con_handle == con_handle ) { 412 return item; 413 } 414 } 415 return NULL; 416 } 417 418 /** 419 * get connection for given address 420 * 421 * @return connection OR NULL, if not found 422 */ 423 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 424 btstack_linked_list_iterator_t it; 425 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 426 while (btstack_linked_list_iterator_has_next(&it)){ 427 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 428 if (connection->address_type != addr_type) continue; 429 if (memcmp(addr, connection->address, 6) != 0) continue; 430 return connection; 431 } 432 return NULL; 433 } 434 435 #ifdef ENABLE_CLASSIC 436 437 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 438 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 439 } 440 441 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 442 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 443 } 444 445 #ifdef ENABLE_SCO_OVER_HCI 446 static int hci_number_sco_connections(void){ 447 int connections = 0; 448 btstack_linked_list_iterator_t it; 449 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 450 while (btstack_linked_list_iterator_has_next(&it)){ 451 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 452 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 453 connections++; 454 } 455 return connections; 456 } 457 #endif 458 459 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 460 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 461 #ifdef HAVE_EMBEDDED_TICK 462 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 463 // connections might be timed out 464 hci_emit_l2cap_check_timeout(connection); 465 } 466 #else 467 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 468 // connections might be timed out 469 hci_emit_l2cap_check_timeout(connection); 470 } 471 #endif 472 } 473 474 static void hci_connection_timestamp(hci_connection_t *connection){ 475 #ifdef HAVE_EMBEDDED_TICK 476 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 477 #else 478 connection->timestamp = btstack_run_loop_get_time_ms(); 479 #endif 480 } 481 482 /** 483 * add authentication flags and reset timer 484 * @note: assumes classic connection 485 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 486 */ 487 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 488 bd_addr_t addr; 489 reverse_bd_addr(bd_addr, addr); 490 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 491 if (conn) { 492 connectionSetAuthenticationFlags(conn, flags); 493 hci_connection_timestamp(conn); 494 } 495 } 496 497 static bool hci_pairing_active(hci_connection_t * hci_connection){ 498 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 499 } 500 501 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 502 if (hci_pairing_active(hci_connection)) return; 503 if (ssp){ 504 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 505 } else { 506 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 507 } 508 // if we are initiator, we have sent an HCI Authenticate Request 509 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 510 511 // if we are responder, use minimal service security level as required level 512 if (!initiator){ 513 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); 514 } 515 516 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 517 518 uint8_t event[12]; 519 event[0] = GAP_EVENT_PAIRING_STARTED; 520 event[1] = 10; 521 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 522 reverse_bd_addr(hci_connection->address, &event[4]); 523 event[10] = (uint8_t) ssp; 524 event[11] = (uint8_t) initiator; 525 hci_emit_event(event, sizeof(event), 1); 526 } 527 528 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 529 hci_connection->requested_security_level = LEVEL_0; 530 if (!hci_pairing_active(hci_connection)) return; 531 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 532 #ifdef ENABLE_CLASSIC_PAIRING_OOB 533 hci_connection->classic_oob_c_192 = NULL; 534 hci_connection->classic_oob_r_192 = NULL; 535 hci_connection->classic_oob_c_256 = NULL; 536 hci_connection->classic_oob_r_256 = NULL; 537 #endif 538 log_info("pairing complete, status %02x", status); 539 540 uint8_t event[11]; 541 event[0] = GAP_EVENT_PAIRING_COMPLETE; 542 event[1] = 9; 543 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 544 reverse_bd_addr(hci_connection->address, &event[4]); 545 event[10] = status; 546 hci_emit_event(event, sizeof(event), 1); 547 548 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 549 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 550 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 551 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 552 hci_connection->bonding_status = status; 553 } 554 } 555 556 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 557 hci_connection_t * conn = hci_connection_for_handle(handle); 558 if (!conn) return false; 559 return hci_pairing_active(conn); 560 } 561 562 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 563 if (!hci_stack->link_key_db) return; 564 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 565 hci_stack->link_key_db->delete_link_key(addr); 566 } 567 568 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 569 if (!hci_stack->link_key_db) return; 570 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 571 hci_stack->link_key_db->put_link_key(addr, link_key, type); 572 } 573 574 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 575 if (!hci_stack->link_key_db) return false; 576 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 577 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 578 return result; 579 } 580 581 void gap_delete_all_link_keys(void){ 582 bd_addr_t addr; 583 link_key_t link_key; 584 link_key_type_t type; 585 btstack_link_key_iterator_t it; 586 int ok = gap_link_key_iterator_init(&it); 587 if (!ok) { 588 log_error("could not initialize iterator"); 589 return; 590 } 591 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 592 gap_drop_link_key_for_bd_addr(addr); 593 } 594 gap_link_key_iterator_done(&it); 595 } 596 597 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 598 if (!hci_stack->link_key_db) return 0; 599 if (!hci_stack->link_key_db->iterator_init) return 0; 600 return hci_stack->link_key_db->iterator_init(it); 601 } 602 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){ 603 if (!hci_stack->link_key_db) return 0; 604 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 605 } 606 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 607 if (!hci_stack->link_key_db) return; 608 hci_stack->link_key_db->iterator_done(it); 609 } 610 #endif 611 612 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 613 switch (address_type){ 614 case BD_ADDR_TYPE_LE_PUBLIC: 615 case BD_ADDR_TYPE_LE_RANDOM: 616 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 617 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 618 return true; 619 default: 620 return false; 621 } 622 } 623 624 static int hci_is_le_connection(hci_connection_t * connection){ 625 return hci_is_le_connection_type(connection->address_type); 626 } 627 628 /** 629 * count connections 630 */ 631 static int nr_hci_connections(void){ 632 int count = 0; 633 btstack_linked_item_t *it; 634 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 635 count++; 636 } 637 return count; 638 } 639 640 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 641 642 unsigned int num_packets_sent_classic = 0; 643 unsigned int num_packets_sent_le = 0; 644 645 btstack_linked_item_t *it; 646 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 647 hci_connection_t * connection = (hci_connection_t *) it; 648 if (hci_is_le_connection(connection)){ 649 num_packets_sent_le += connection->num_packets_sent; 650 } 651 if (connection->address_type == BD_ADDR_TYPE_ACL){ 652 num_packets_sent_classic += connection->num_packets_sent; 653 } 654 } 655 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 656 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 657 int free_slots_le = 0; 658 659 if (free_slots_classic < 0){ 660 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); 661 return 0; 662 } 663 664 if (hci_stack->le_acl_packets_total_num){ 665 // if we have LE slots, they are used 666 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 667 if (free_slots_le < 0){ 668 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); 669 return 0; 670 } 671 } else { 672 // otherwise, classic slots are used for LE, too 673 free_slots_classic -= num_packets_sent_le; 674 if (free_slots_classic < 0){ 675 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); 676 return 0; 677 } 678 } 679 680 switch (address_type){ 681 case BD_ADDR_TYPE_UNKNOWN: 682 log_error("hci_number_free_acl_slots: unknown address type"); 683 return 0; 684 685 case BD_ADDR_TYPE_ACL: 686 return (uint16_t) free_slots_classic; 687 688 default: 689 if (hci_stack->le_acl_packets_total_num > 0){ 690 return (uint16_t) free_slots_le; 691 } 692 return (uint16_t) free_slots_classic; 693 } 694 } 695 696 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 697 // get connection type 698 hci_connection_t * connection = hci_connection_for_handle(con_handle); 699 if (!connection){ 700 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 701 return 0; 702 } 703 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 704 } 705 706 #ifdef ENABLE_CLASSIC 707 static int hci_number_free_sco_slots(void){ 708 unsigned int num_sco_packets_sent = 0; 709 btstack_linked_item_t *it; 710 if (hci_stack->synchronous_flow_control_enabled){ 711 // explicit flow control 712 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 713 hci_connection_t * connection = (hci_connection_t *) it; 714 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 715 num_sco_packets_sent += connection->num_packets_sent; 716 } 717 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 718 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 719 return 0; 720 } 721 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 722 } else { 723 // implicit flow control -- TODO 724 int num_ready = 0; 725 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 726 hci_connection_t * connection = (hci_connection_t *) it; 727 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 728 if (connection->sco_tx_ready == 0) continue; 729 num_ready++; 730 } 731 return num_ready; 732 } 733 } 734 #endif 735 736 // only used to send HCI Host Number Completed Packets 737 static int hci_can_send_comand_packet_transport(void){ 738 if (hci_stack->hci_packet_buffer_reserved) return 0; 739 740 // check for async hci transport implementations 741 if (hci_stack->hci_transport->can_send_packet_now){ 742 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 743 return 0; 744 } 745 } 746 return 1; 747 } 748 749 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 750 bool hci_can_send_command_packet_now(void){ 751 if (hci_can_send_comand_packet_transport() == 0) return false; 752 return hci_stack->num_cmd_packets > 0u; 753 } 754 755 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 756 // check for async hci transport implementations 757 if (!hci_stack->hci_transport->can_send_packet_now) return true; 758 return hci_stack->hci_transport->can_send_packet_now(packet_type); 759 } 760 761 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 762 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 763 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 764 } 765 766 bool hci_can_send_acl_le_packet_now(void){ 767 if (hci_stack->hci_packet_buffer_reserved) return false; 768 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 769 } 770 771 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 772 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 773 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 774 } 775 776 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 777 if (hci_stack->hci_packet_buffer_reserved) return false; 778 return hci_can_send_prepared_acl_packet_now(con_handle); 779 } 780 781 #ifdef ENABLE_CLASSIC 782 bool hci_can_send_acl_classic_packet_now(void){ 783 if (hci_stack->hci_packet_buffer_reserved) return false; 784 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 785 } 786 787 bool hci_can_send_prepared_sco_packet_now(void){ 788 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 789 if (hci_have_usb_transport()){ 790 return hci_stack->sco_can_send_now; 791 } else { 792 return hci_number_free_sco_slots() > 0; 793 } 794 } 795 796 bool hci_can_send_sco_packet_now(void){ 797 if (hci_stack->hci_packet_buffer_reserved) return false; 798 return hci_can_send_prepared_sco_packet_now(); 799 } 800 801 void hci_request_sco_can_send_now_event(void){ 802 hci_stack->sco_waiting_for_can_send_now = 1; 803 hci_notify_if_sco_can_send_now(); 804 } 805 #endif 806 807 // used for internal checks in l2cap.c 808 bool hci_is_packet_buffer_reserved(void){ 809 return hci_stack->hci_packet_buffer_reserved; 810 } 811 812 // reserves outgoing packet buffer. 813 // @return 1 if successful 814 bool hci_reserve_packet_buffer(void){ 815 if (hci_stack->hci_packet_buffer_reserved) { 816 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 817 return false; 818 } 819 hci_stack->hci_packet_buffer_reserved = true; 820 return true; 821 } 822 823 void hci_release_packet_buffer(void){ 824 hci_stack->hci_packet_buffer_reserved = false; 825 } 826 827 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 828 static int hci_transport_synchronous(void){ 829 return hci_stack->hci_transport->can_send_packet_now == NULL; 830 } 831 832 // used for debugging 833 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 834 static void hci_controller_dump_packets(void){ 835 // format: "{handle:04x}:{count:02d} " 836 char summaries[3][7 * 8 + 1]; 837 uint16_t totals[3]; 838 uint8_t index; 839 for (index = 0 ; index < 3 ; index++){ 840 summaries[index][0] = 0; 841 totals[index] = 0; 842 } 843 btstack_linked_item_t *it; 844 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 845 hci_connection_t * connection = (hci_connection_t *) it; 846 switch (connection->address_type){ 847 case BD_ADDR_TYPE_ACL: 848 index = 0; 849 break; 850 case BD_ADDR_TYPE_SCO: 851 index = 2; 852 break; 853 default: 854 index = 1; 855 break; 856 } 857 totals[index] += connection->num_packets_sent; 858 char item_text[10]; 859 sprintf(item_text, "%04x:%02d ", connection->con_handle,connection->num_packets_sent); 860 btstack_strcat(summaries[index], sizeof(summaries[0]), item_text); 861 } 862 for (index = 0 ; index < 3 ; index++){ 863 if (summaries[index][0] == 0){ 864 summaries[index][0] = '-'; 865 summaries[index][1] = 0; 866 } 867 } 868 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]); 869 } 870 #endif 871 872 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 873 874 // 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); 875 876 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 877 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 878 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 879 max_acl_data_packet_length = hci_stack->le_data_packets_length; 880 } 881 882 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 883 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 884 max_acl_data_packet_length = connection->le_max_tx_octets; 885 } 886 #endif 887 888 log_debug("hci_send_acl_packet_fragments entered"); 889 890 uint8_t status = ERROR_CODE_SUCCESS; 891 // multiple packets could be send on a synchronous HCI transport 892 while (true){ 893 894 log_debug("hci_send_acl_packet_fragments loop entered"); 895 896 // get current data 897 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 898 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 899 bool more_fragments = false; 900 901 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 902 if (current_acl_data_packet_length > max_acl_data_packet_length){ 903 more_fragments = true; 904 current_acl_data_packet_length = max_acl_data_packet_length; 905 } 906 907 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 908 if (acl_header_pos > 0u){ 909 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 910 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 911 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 912 } 913 914 // update header len 915 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 916 917 // count packet 918 connection->num_packets_sent++; 919 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 920 921 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 922 if (more_fragments){ 923 // update start of next fragment to send 924 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 925 } else { 926 // done 927 hci_stack->acl_fragmentation_pos = 0; 928 hci_stack->acl_fragmentation_total_size = 0; 929 } 930 931 // send packet 932 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 933 const int size = current_acl_data_packet_length + 4; 934 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 935 hci_stack->acl_fragmentation_tx_active = 1; 936 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 937 if (err != 0){ 938 // no error from HCI Transport expected 939 status = ERROR_CODE_HARDWARE_FAILURE; 940 } 941 942 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 943 hci_controller_dump_packets(); 944 #endif 945 946 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 947 948 // done yet? 949 if (!more_fragments) break; 950 951 // can send more? 952 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 953 } 954 955 log_debug("hci_send_acl_packet_fragments loop over"); 956 957 // release buffer now for synchronous transport 958 if (hci_transport_synchronous()){ 959 hci_stack->acl_fragmentation_tx_active = 0; 960 hci_release_packet_buffer(); 961 hci_emit_transport_packet_sent(); 962 } 963 964 return status; 965 } 966 967 // pre: caller has reserved the packet buffer 968 uint8_t hci_send_acl_packet_buffer(int size){ 969 btstack_assert(hci_stack->hci_packet_buffer_reserved); 970 971 uint8_t * packet = hci_stack->hci_packet_buffer; 972 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 973 974 // check for free places on Bluetooth module 975 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 976 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 977 hci_release_packet_buffer(); 978 hci_emit_transport_packet_sent(); 979 return BTSTACK_ACL_BUFFERS_FULL; 980 } 981 982 hci_connection_t *connection = hci_connection_for_handle( con_handle); 983 if (!connection) { 984 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 985 hci_release_packet_buffer(); 986 hci_emit_transport_packet_sent(); 987 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 988 } 989 990 #ifdef ENABLE_CLASSIC 991 hci_connection_timestamp(connection); 992 #endif 993 994 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 995 996 // setup data 997 hci_stack->acl_fragmentation_total_size = size; 998 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 999 1000 return hci_send_acl_packet_fragments(connection); 1001 } 1002 1003 #ifdef ENABLE_CLASSIC 1004 // pre: caller has reserved the packet buffer 1005 uint8_t hci_send_sco_packet_buffer(int size){ 1006 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1007 1008 uint8_t * packet = hci_stack->hci_packet_buffer; 1009 1010 // skip checks in loopback mode 1011 if (!hci_stack->loopback_mode){ 1012 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 1013 1014 // check for free places on Bluetooth module 1015 if (!hci_can_send_prepared_sco_packet_now()) { 1016 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 1017 hci_release_packet_buffer(); 1018 hci_emit_transport_packet_sent(); 1019 return BTSTACK_ACL_BUFFERS_FULL; 1020 } 1021 1022 // track send packet in connection struct 1023 hci_connection_t *connection = hci_connection_for_handle( con_handle); 1024 if (!connection) { 1025 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 1026 hci_release_packet_buffer(); 1027 hci_emit_transport_packet_sent(); 1028 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1029 } 1030 1031 if (hci_have_usb_transport()){ 1032 // token used 1033 hci_stack->sco_can_send_now = false; 1034 } else { 1035 if (hci_stack->synchronous_flow_control_enabled){ 1036 connection->num_packets_sent++; 1037 } else { 1038 connection->sco_tx_ready--; 1039 } 1040 } 1041 } 1042 1043 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 1044 1045 #ifdef HAVE_SCO_TRANSPORT 1046 hci_stack->sco_transport->send_packet(packet, size); 1047 hci_release_packet_buffer(); 1048 hci_emit_transport_packet_sent(); 1049 1050 return 0; 1051 #else 1052 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 1053 if (hci_transport_synchronous()){ 1054 hci_release_packet_buffer(); 1055 hci_emit_transport_packet_sent(); 1056 } 1057 1058 if (err != 0){ 1059 return ERROR_CODE_HARDWARE_FAILURE; 1060 } 1061 return ERROR_CODE_SUCCESS; 1062 #endif 1063 } 1064 #endif 1065 1066 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 1067 static uint8_t hci_send_iso_packet_fragments(void){ 1068 1069 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 1070 uint8_t status = ERROR_CODE_SUCCESS; 1071 // multiple packets could be send on a synchronous HCI transport 1072 while (true){ 1073 1074 // get current data 1075 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 1076 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 1077 bool more_fragments = false; 1078 1079 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 1080 if (current_iso_data_packet_length > max_iso_data_packet_length){ 1081 more_fragments = true; 1082 current_iso_data_packet_length = max_iso_data_packet_length; 1083 } 1084 1085 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1086 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1087 uint8_t pb_flags; 1088 if (iso_header_pos == 0u){ 1089 // first fragment, keep TS field 1090 pb_flags = more_fragments ? 0x00 : 0x02; 1091 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1092 } else { 1093 // later fragment, drop TS field 1094 pb_flags = more_fragments ? 0x01 : 0x03; 1095 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1096 } 1097 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1098 1099 // update header len 1100 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1101 1102 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1103 if (more_fragments){ 1104 // update start of next fragment to send 1105 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1106 } else { 1107 // done 1108 hci_stack->iso_fragmentation_pos = 0; 1109 hci_stack->iso_fragmentation_total_size = 0; 1110 } 1111 1112 // send packet 1113 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1114 const int size = current_iso_data_packet_length + 4; 1115 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1116 hci_stack->iso_fragmentation_tx_active = true; 1117 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1118 if (err != 0){ 1119 // no error from HCI Transport expected 1120 status = ERROR_CODE_HARDWARE_FAILURE; 1121 } 1122 1123 // done yet? 1124 if (!more_fragments) break; 1125 1126 // can send more? 1127 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1128 } 1129 1130 // release buffer now for synchronous transport 1131 if (hci_transport_synchronous()){ 1132 hci_stack->iso_fragmentation_tx_active = false; 1133 hci_release_packet_buffer(); 1134 hci_emit_transport_packet_sent(); 1135 } 1136 1137 return status; 1138 } 1139 1140 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1141 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1142 1143 hci_con_handle_t con_handle = (hci_con_handle_t) little_endian_read_16(hci_stack->hci_packet_buffer, 0) & 0xfff; 1144 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(con_handle); 1145 if (iso_stream == NULL){ 1146 hci_release_packet_buffer(); 1147 hci_iso_notify_can_send_now(); 1148 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1149 } 1150 1151 // TODO: check for space on controller 1152 1153 // skip iso packets if needed 1154 if (iso_stream->num_packets_to_skip > 0){ 1155 iso_stream->num_packets_to_skip--; 1156 // pretend it was processed and trigger next one 1157 hci_release_packet_buffer(); 1158 hci_iso_notify_can_send_now(); 1159 return ERROR_CODE_SUCCESS; 1160 } 1161 1162 // track outgoing packet sent 1163 log_info("Outgoing ISO packet for con handle 0x%04x", con_handle); 1164 iso_stream->num_packets_sent++; 1165 1166 // setup data 1167 hci_stack->iso_fragmentation_total_size = size; 1168 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1169 1170 return hci_send_iso_packet_fragments(); 1171 } 1172 #endif 1173 1174 static void acl_handler(uint8_t *packet, uint16_t size){ 1175 1176 // get info 1177 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1178 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1179 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1180 uint16_t acl_length = READ_ACL_LENGTH(packet); 1181 1182 // ignore non-registered handle 1183 if (!conn){ 1184 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1185 return; 1186 } 1187 1188 // assert packet is complete 1189 if ((acl_length + 4u) != size){ 1190 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1191 return; 1192 } 1193 1194 #ifdef ENABLE_CLASSIC 1195 // update idle timestamp 1196 hci_connection_timestamp(conn); 1197 #endif 1198 1199 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1200 hci_stack->host_completed_packets = 1; 1201 conn->num_packets_completed++; 1202 #endif 1203 1204 // handle different packet types 1205 switch (acl_flags & 0x03u) { 1206 1207 case 0x01: // continuation fragment 1208 1209 // sanity checks 1210 if (conn->acl_recombination_pos == 0u) { 1211 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1212 return; 1213 } 1214 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1215 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1216 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1217 conn->acl_recombination_pos = 0; 1218 return; 1219 } 1220 1221 // append fragment payload (header already stored) 1222 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1223 &packet[4], acl_length); 1224 conn->acl_recombination_pos += acl_length; 1225 1226 // forward complete L2CAP packet if complete. 1227 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1228 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1229 // reset recombination buffer 1230 conn->acl_recombination_length = 0; 1231 conn->acl_recombination_pos = 0; 1232 } 1233 break; 1234 1235 case 0x02: { // first fragment 1236 1237 // sanity check 1238 if (conn->acl_recombination_pos) { 1239 // we just received the first fragment, but still have data. Only warn if the packet wasn't a flushable packet 1240 if ((conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE+1] >> 4) != 0x02){ 1241 log_error( "ACL First Fragment but %u bytes in buffer for handle 0x%02x, dropping stale fragments", conn->acl_recombination_pos, con_handle); 1242 } 1243 conn->acl_recombination_pos = 0; 1244 } 1245 1246 // peek into L2CAP packet! 1247 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1248 1249 // compare fragment size to L2CAP packet size 1250 if (acl_length >= (l2cap_length + 4u)){ 1251 // forward fragment as L2CAP packet 1252 hci_emit_acl_packet(packet, acl_length + 4u); 1253 } else { 1254 1255 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1256 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1257 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1258 return; 1259 } 1260 1261 // store first fragment and tweak acl length for complete package 1262 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1263 packet, acl_length + 4u); 1264 conn->acl_recombination_pos = acl_length + 4u; 1265 conn->acl_recombination_length = l2cap_length; 1266 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1267 } 1268 break; 1269 1270 } 1271 default: 1272 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1273 return; 1274 } 1275 1276 // execute main loop 1277 hci_run(); 1278 } 1279 1280 static void hci_connection_stop_timer(hci_connection_t * conn){ 1281 btstack_run_loop_remove_timer(&conn->timeout); 1282 #ifdef ENABLE_CLASSIC 1283 btstack_run_loop_remove_timer(&conn->timeout_sco); 1284 #endif 1285 } 1286 1287 static void hci_shutdown_connection(hci_connection_t *conn){ 1288 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1289 1290 #ifdef ENABLE_CLASSIC 1291 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1292 bd_addr_type_t addr_type = conn->address_type; 1293 #endif 1294 #ifdef HAVE_SCO_TRANSPORT 1295 hci_con_handle_t con_handle = conn->con_handle; 1296 #endif 1297 #endif 1298 1299 hci_connection_stop_timer(conn); 1300 1301 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1302 btstack_memory_hci_connection_free( conn ); 1303 1304 // now it's gone 1305 hci_emit_nr_connections_changed(); 1306 1307 #ifdef ENABLE_CLASSIC 1308 #ifdef ENABLE_SCO_OVER_HCI 1309 // update SCO 1310 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1311 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1312 } 1313 #endif 1314 #ifdef HAVE_SCO_TRANSPORT 1315 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1316 hci_stack->sco_transport->close(con_handle); 1317 } 1318 #endif 1319 #endif 1320 } 1321 1322 #ifdef ENABLE_CLASSIC 1323 1324 static const uint16_t packet_type_sizes[] = { 1325 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1326 HCI_ACL_DH1_SIZE, 0, 0, 0, 1327 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1328 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1329 }; 1330 static const uint8_t packet_type_feature_requirement_bit[] = { 1331 0, // 3 slot packets 1332 1, // 5 slot packets 1333 25, // EDR 2 mpbs 1334 26, // EDR 3 mbps 1335 39, // 3 slot EDR packts 1336 40, // 5 slot EDR packet 1337 }; 1338 static const uint16_t packet_type_feature_packet_mask[] = { 1339 0x0f00, // 3 slot packets 1340 0xf000, // 5 slot packets 1341 0x1102, // EDR 2 mpbs 1342 0x2204, // EDR 3 mbps 1343 0x0300, // 3 slot EDR packts 1344 0x3000, // 5 slot EDR packet 1345 }; 1346 1347 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1348 // enable packet types based on size 1349 uint16_t packet_types = 0; 1350 unsigned int i; 1351 for (i=0;i<16;i++){ 1352 if (packet_type_sizes[i] == 0) continue; 1353 if (packet_type_sizes[i] <= buffer_size){ 1354 packet_types |= 1 << i; 1355 } 1356 } 1357 // disable packet types due to missing local supported features 1358 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1359 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1360 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1361 if (feature_set) continue; 1362 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1363 packet_types &= ~packet_type_feature_packet_mask[i]; 1364 } 1365 // flip bits for "may not be used" 1366 packet_types ^= 0x3306; 1367 return packet_types; 1368 } 1369 1370 uint16_t hci_usable_acl_packet_types(void){ 1371 return hci_stack->packet_types; 1372 } 1373 #endif 1374 1375 uint8_t* hci_get_outgoing_packet_buffer(void){ 1376 // hci packet buffer is >= acl data packet length 1377 return hci_stack->hci_packet_buffer; 1378 } 1379 1380 uint16_t hci_max_acl_data_packet_length(void){ 1381 return hci_stack->acl_data_packet_length; 1382 } 1383 1384 #ifdef ENABLE_CLASSIC 1385 bool hci_extended_sco_link_supported(void){ 1386 // No. 31, byte 3, bit 7 1387 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1388 } 1389 #endif 1390 1391 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1392 // No. 54, byte 6, bit 6 1393 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1394 } 1395 1396 #ifdef ENABLE_CLASSIC 1397 static int gap_ssp_supported(void){ 1398 // No. 51, byte 6, bit 3 1399 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1400 } 1401 #endif 1402 1403 static int hci_classic_supported(void){ 1404 #ifdef ENABLE_CLASSIC 1405 // No. 37, byte 4, bit 5, = No BR/EDR Support 1406 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1407 #else 1408 return 0; 1409 #endif 1410 } 1411 1412 static int hci_le_supported(void){ 1413 #ifdef ENABLE_BLE 1414 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1415 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1416 #else 1417 return 0; 1418 #endif 1419 } 1420 1421 static bool hci_command_supported(uint8_t command_index){ 1422 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1423 } 1424 1425 #ifdef ENABLE_BLE 1426 1427 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1428 static bool hci_extended_advertising_supported(void){ 1429 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1430 } 1431 #endif 1432 1433 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1434 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1435 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1436 } else { 1437 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1438 } 1439 } 1440 1441 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1442 *addr_type = hci_stack->le_own_addr_type; 1443 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1444 } 1445 1446 #ifdef ENABLE_LE_PERIPHERAL 1447 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1448 *addr_type = hci_stack->le_advertisements_own_addr_type; 1449 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1450 }; 1451 #endif 1452 1453 #ifdef ENABLE_LE_CENTRAL 1454 1455 /** 1456 * @brief Get own addr type and address used for LE connections (Central) 1457 */ 1458 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1459 *addr_type = hci_stack->le_connection_own_addr_type; 1460 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1461 } 1462 1463 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1464 1465 uint16_t offset = 3; 1466 uint8_t num_reports = packet[offset]; 1467 offset += 1; 1468 1469 uint16_t i; 1470 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1471 for (i=0; (i<num_reports) && (offset < size);i++){ 1472 // sanity checks on data_length: 1473 uint8_t data_length = packet[offset + 8]; 1474 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1475 if ((offset + 9u + data_length + 1u) > size) return; 1476 // setup event 1477 uint8_t event_size = 10u + data_length; 1478 uint16_t pos = 0; 1479 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1480 event[pos++] = event_size; 1481 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1482 offset += 8; 1483 pos += 8; 1484 event[pos++] = packet[offset + 1 + data_length]; // rssi 1485 event[pos++] = data_length; 1486 offset++; 1487 (void)memcpy(&event[pos], &packet[offset], data_length); 1488 pos += data_length; 1489 offset += data_length + 1u; // rssi 1490 hci_emit_event(event, pos, 1); 1491 } 1492 } 1493 1494 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1495 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1496 uint16_t offset = 3; 1497 uint8_t num_reports = packet[offset++]; 1498 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1499 uint8_t i; 1500 for (i=0; (i<num_reports) && (offset < size);i++){ 1501 // sanity checks on data_length: 1502 uint16_t data_length = packet[offset + 23]; 1503 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1504 if ((offset + 24u + data_length) > size) return; 1505 uint16_t event_type = little_endian_read_16(packet, offset); 1506 offset += 2; 1507 if ((event_type & 0x10) != 0) { 1508 // setup legacy event 1509 uint8_t legacy_event_type; 1510 switch (event_type){ 1511 case 0b0010011: 1512 // ADV_IND 1513 legacy_event_type = 0; 1514 break; 1515 case 0b0010101: 1516 // ADV_DIRECT_IND 1517 legacy_event_type = 1; 1518 break; 1519 case 0b0010010: 1520 // ADV_SCAN_IND 1521 legacy_event_type = 2; 1522 break; 1523 case 0b0010000: 1524 // ADV_NONCONN_IND 1525 legacy_event_type = 3; 1526 break; 1527 case 0b0011011: 1528 case 0b0011010: 1529 // SCAN_RSP 1530 legacy_event_type = 4; 1531 break; 1532 default: 1533 legacy_event_type = 0; 1534 break; 1535 } 1536 uint16_t pos = 0; 1537 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1538 event[pos++] = 10u + data_length; 1539 event[pos++] = legacy_event_type; 1540 // copy address type + address 1541 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1542 offset += 7; 1543 pos += 7; 1544 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1545 offset += 4; 1546 // copy rssi 1547 event[pos++] = packet[offset++]; 1548 // skip periodic advertising interval and direct address 1549 offset += 9; 1550 // copy data len + data; 1551 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1552 pos += 1 +data_length; 1553 offset += 1+ data_length; 1554 hci_emit_event(event, pos, 1); 1555 } else { 1556 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1557 uint8_t report_len = 24 + data_length; 1558 event[1] = report_len; 1559 little_endian_store_16(event, 2, event_type); 1560 memcpy(&event[4], &packet[offset], report_len); 1561 offset += report_len; 1562 hci_emit_event(event, 2 + report_len, 1); 1563 } 1564 } 1565 } 1566 #endif 1567 1568 #endif 1569 #endif 1570 1571 #ifdef ENABLE_BLE 1572 #ifdef ENABLE_LE_PERIPHERAL 1573 static void hci_update_advertisements_enabled_for_current_roles(void){ 1574 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1575 // get number of active le slave connections 1576 int num_slave_connections = 0; 1577 btstack_linked_list_iterator_t it; 1578 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1579 while (btstack_linked_list_iterator_has_next(&it)){ 1580 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1581 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1582 if (con->state != OPEN) continue; 1583 if (con->role != HCI_ROLE_SLAVE) continue; 1584 if (!hci_is_le_connection(con)) continue; 1585 num_slave_connections++; 1586 } 1587 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1588 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1589 } else { 1590 hci_stack->le_advertisements_enabled_for_current_roles = false; 1591 } 1592 } 1593 #endif 1594 #endif 1595 1596 #ifdef ENABLE_CLASSIC 1597 static void gap_run_set_local_name(void){ 1598 hci_reserve_packet_buffer(); 1599 uint8_t * packet = hci_stack->hci_packet_buffer; 1600 // construct HCI Command and send 1601 uint16_t opcode = hci_write_local_name.opcode; 1602 hci_stack->last_cmd_opcode = opcode; 1603 packet[0] = opcode & 0xff; 1604 packet[1] = opcode >> 8; 1605 packet[2] = DEVICE_NAME_LEN; 1606 memset(&packet[3], 0, DEVICE_NAME_LEN); 1607 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1608 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1609 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1610 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1611 // expand '00:00:00:00:00:00' in name with bd_addr 1612 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1613 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1614 } 1615 1616 static void gap_run_set_eir_data(void){ 1617 hci_reserve_packet_buffer(); 1618 uint8_t * packet = hci_stack->hci_packet_buffer; 1619 // construct HCI Command in-place and send 1620 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1621 hci_stack->last_cmd_opcode = opcode; 1622 uint16_t offset = 0; 1623 packet[offset++] = opcode & 0xff; 1624 packet[offset++] = opcode >> 8; 1625 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1626 packet[offset++] = 0; // FEC not required 1627 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1628 if (hci_stack->eir_data){ 1629 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1630 ad_context_t context; 1631 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1632 uint8_t data_type = ad_iterator_get_data_type(&context); 1633 uint8_t size = ad_iterator_get_data_len(&context); 1634 const uint8_t *data = ad_iterator_get_data(&context); 1635 // copy item 1636 packet[offset++] = size + 1; 1637 packet[offset++] = data_type; 1638 memcpy(&packet[offset], data, size); 1639 // update name item 1640 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1641 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1642 } 1643 offset += size; 1644 } 1645 } else { 1646 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1647 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1648 packet[offset++] = bytes_to_copy + 1; 1649 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1650 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1651 // expand '00:00:00:00:00:00' in name with bd_addr 1652 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1653 } 1654 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1655 } 1656 1657 static void hci_run_gap_tasks_classic(void){ 1658 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1659 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1660 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1661 return; 1662 } 1663 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1664 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1665 gap_run_set_local_name(); 1666 return; 1667 } 1668 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1669 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1670 gap_run_set_eir_data(); 1671 return; 1672 } 1673 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1674 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1675 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1676 return; 1677 } 1678 // write page scan activity 1679 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1680 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1681 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1682 return; 1683 } 1684 // write page scan type 1685 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1686 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1687 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1688 return; 1689 } 1690 // write page timeout 1691 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1692 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1693 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1694 return; 1695 } 1696 // send scan enable 1697 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1698 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1699 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1700 return; 1701 } 1702 // send write scan activity 1703 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1704 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1705 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1706 return; 1707 } 1708 } 1709 #endif 1710 1711 #ifndef HAVE_HOST_CONTROLLER_API 1712 1713 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1714 if (!hci_stack->config) return 0; 1715 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1716 // Limit baud rate for Broadcom chipsets to 3 mbps 1717 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1718 baud_rate = 3000000; 1719 } 1720 return baud_rate; 1721 } 1722 1723 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1724 UNUSED(ds); 1725 1726 switch (hci_stack->substate){ 1727 case HCI_INIT_W4_SEND_RESET: 1728 log_info("Resend HCI Reset"); 1729 hci_stack->substate = HCI_INIT_SEND_RESET; 1730 hci_stack->num_cmd_packets = 1; 1731 hci_run(); 1732 break; 1733 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1734 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1735 if (hci_stack->hci_transport->reset_link){ 1736 hci_stack->hci_transport->reset_link(); 1737 } 1738 1739 /* fall through */ 1740 1741 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1742 log_info("Resend HCI Reset - CSR Warm Boot"); 1743 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1744 hci_stack->num_cmd_packets = 1; 1745 hci_run(); 1746 break; 1747 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1748 if (hci_stack->hci_transport->set_baudrate){ 1749 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1750 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1751 hci_stack->hci_transport->set_baudrate(baud_rate); 1752 } 1753 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1754 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1755 if (hci_stack->hci_transport->reset_link){ 1756 log_info("Link Reset"); 1757 hci_stack->hci_transport->reset_link(); 1758 } 1759 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1760 hci_run(); 1761 } 1762 break; 1763 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1764 // otherwise continue 1765 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1766 hci_send_cmd(&hci_read_local_supported_commands); 1767 break; 1768 default: 1769 break; 1770 } 1771 } 1772 #endif 1773 1774 static void hci_initializing_next_state(void){ 1775 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1776 } 1777 1778 static void hci_init_done(void){ 1779 // done. tell the app 1780 log_info("hci_init_done -> HCI_STATE_WORKING"); 1781 hci_stack->state = HCI_STATE_WORKING; 1782 hci_emit_state(); 1783 } 1784 1785 // assumption: hci_can_send_command_packet_now() == true 1786 static void hci_initializing_run(void){ 1787 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1788 1789 if (!hci_can_send_command_packet_now()) return; 1790 1791 #ifndef HAVE_HOST_CONTROLLER_API 1792 bool need_baud_change = hci_stack->config 1793 && hci_stack->chipset 1794 && hci_stack->chipset->set_baudrate_command 1795 && hci_stack->hci_transport->set_baudrate 1796 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1797 #endif 1798 1799 switch (hci_stack->substate){ 1800 case HCI_INIT_SEND_RESET: 1801 hci_state_reset(); 1802 1803 #ifndef HAVE_HOST_CONTROLLER_API 1804 // prepare reset if command complete not received in 100ms 1805 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1806 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1807 btstack_run_loop_add_timer(&hci_stack->timeout); 1808 #endif 1809 // send command 1810 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1811 hci_send_cmd(&hci_reset); 1812 break; 1813 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1814 hci_send_cmd(&hci_read_local_version_information); 1815 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1816 break; 1817 1818 #ifndef HAVE_HOST_CONTROLLER_API 1819 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1820 hci_state_reset(); 1821 // prepare reset if command complete not received in 100ms 1822 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1823 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1824 btstack_run_loop_add_timer(&hci_stack->timeout); 1825 // send command 1826 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1827 hci_send_cmd(&hci_reset); 1828 break; 1829 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1830 hci_state_reset(); 1831 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1832 hci_send_cmd(&hci_reset); 1833 break; 1834 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1835 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1836 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1837 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1838 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1839 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1840 break; 1841 } 1842 case HCI_INIT_SET_BD_ADDR: 1843 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1844 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1845 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1846 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1847 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1848 break; 1849 case HCI_INIT_SEND_READ_LOCAL_NAME: 1850 #ifdef ENABLE_CLASSIC 1851 hci_send_cmd(&hci_read_local_name); 1852 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1853 break; 1854 #endif 1855 /* fall through */ 1856 1857 case HCI_INIT_SEND_BAUD_CHANGE: 1858 if (need_baud_change) { 1859 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1860 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1861 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1862 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1863 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1864 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1865 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1866 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1867 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1868 btstack_run_loop_add_timer(&hci_stack->timeout); 1869 } 1870 break; 1871 } 1872 1873 /* fall through */ 1874 1875 case HCI_INIT_CUSTOM_INIT: 1876 // Custom initialization 1877 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1878 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1879 bool send_cmd = false; 1880 switch (hci_stack->chipset_result){ 1881 case BTSTACK_CHIPSET_VALID_COMMAND: 1882 send_cmd = true; 1883 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1884 break; 1885 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1886 send_cmd = true; 1887 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1888 log_info("CSR Warm Boot"); 1889 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1890 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1891 btstack_run_loop_add_timer(&hci_stack->timeout); 1892 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1893 && hci_stack->config 1894 && hci_stack->chipset 1895 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1896 && hci_stack->hci_transport->set_baudrate 1897 && hci_transport_uart_get_main_baud_rate()){ 1898 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1899 } else { 1900 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1901 } 1902 break; 1903 default: 1904 break; 1905 } 1906 1907 if (send_cmd){ 1908 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1909 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1910 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1911 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1912 break; 1913 } 1914 log_info("Init script done"); 1915 1916 // Init script download on Broadcom chipsets causes: 1917 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1918 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1919 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1920 1921 // - baud rate to reset, restore UART baud rate if needed 1922 if (need_baud_change) { 1923 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1924 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1925 hci_stack->hci_transport->set_baudrate(baud_rate); 1926 } 1927 1928 uint16_t bcm_delay_ms = 300; 1929 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1930 // -> Work around: wait here. 1931 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1932 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1933 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1934 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1935 btstack_run_loop_add_timer(&hci_stack->timeout); 1936 break; 1937 } 1938 } 1939 #endif 1940 /* fall through */ 1941 1942 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1943 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1944 hci_send_cmd(&hci_read_local_supported_commands); 1945 break; 1946 case HCI_INIT_READ_BD_ADDR: 1947 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1948 hci_send_cmd(&hci_read_bd_addr); 1949 break; 1950 case HCI_INIT_READ_BUFFER_SIZE: 1951 // only read buffer size if supported 1952 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1953 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1954 hci_send_cmd(&hci_read_buffer_size); 1955 break; 1956 } 1957 1958 /* fall through */ 1959 1960 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1961 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1962 hci_send_cmd(&hci_read_local_supported_features); 1963 break; 1964 1965 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1966 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1967 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1968 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1969 break; 1970 case HCI_INIT_HOST_BUFFER_SIZE: 1971 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1972 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1973 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1974 break; 1975 #endif 1976 1977 case HCI_INIT_SET_EVENT_MASK: 1978 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1979 if (hci_le_supported()){ 1980 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1981 } else { 1982 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1983 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1984 } 1985 break; 1986 1987 case HCI_INIT_SET_EVENT_MASK_2: 1988 // On Bluettooth PTS dongle (BL 654) with PacketCraft HCI Firmware (LMP subversion) 0x5244, 1989 // setting Event Mask 2 causes Controller to drop Encryption Change events. 1990 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2) 1991 && (hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_PACKETCRAFT_INC)){ 1992 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1993 // Encryption Change Event v2 - bit 25 1994 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1995 break; 1996 } 1997 1998 #ifdef ENABLE_CLASSIC 1999 /* fall through */ 2000 2001 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 2002 if (hci_classic_supported() && gap_ssp_supported()){ 2003 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 2004 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 2005 break; 2006 } 2007 2008 /* fall through */ 2009 2010 case HCI_INIT_WRITE_INQUIRY_MODE: 2011 if (hci_classic_supported()){ 2012 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 2013 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 2014 break; 2015 } 2016 2017 /* fall through */ 2018 2019 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 2020 // skip write secure connections host support if not supported or disabled 2021 if (hci_classic_supported() && hci_stack->secure_connections_enable 2022 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 2023 hci_stack->secure_connections_active = true; 2024 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 2025 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 2026 break; 2027 } 2028 2029 /* fall through */ 2030 2031 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 2032 // skip set min encryption key size 2033 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 2034 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 2035 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 2036 break; 2037 } 2038 2039 #ifdef ENABLE_SCO_OVER_HCI 2040 /* fall through */ 2041 2042 // only sent if ENABLE_SCO_OVER_HCI is defined 2043 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2044 // skip write synchronous flow control if not supported 2045 if (hci_classic_supported() 2046 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 2047 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2048 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 2049 break; 2050 } 2051 /* fall through */ 2052 2053 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2054 // skip write default erroneous data reporting if not supported 2055 if (hci_classic_supported() 2056 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 2057 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2058 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 2059 break; 2060 } 2061 #endif 2062 2063 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 2064 /* fall through */ 2065 2066 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 2067 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 2068 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2069 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 2070 #ifdef ENABLE_SCO_OVER_HCI 2071 log_info("BCM: Route SCO data via HCI transport"); 2072 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 2073 #endif 2074 #ifdef ENABLE_SCO_OVER_PCM 2075 log_info("BCM: Route SCO data via PCM interface"); 2076 #ifdef ENABLE_BCM_PCM_WBS 2077 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 2078 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 2079 #else 2080 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2081 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 2082 #endif 2083 #endif 2084 break; 2085 } 2086 #endif 2087 2088 #ifdef ENABLE_SCO_OVER_PCM 2089 /* fall through */ 2090 2091 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2092 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2093 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2094 log_info("BCM: Config PCM interface for I2S"); 2095 #ifdef ENABLE_BCM_PCM_WBS 2096 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 2097 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 2098 #else 2099 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2100 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 2101 #endif 2102 break; 2103 } 2104 #endif 2105 #endif 2106 2107 #ifdef ENABLE_BLE 2108 /* fall through */ 2109 2110 // LE INIT 2111 case HCI_INIT_LE_READ_BUFFER_SIZE: 2112 if (hci_le_supported()){ 2113 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2114 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2115 hci_send_cmd(&hci_le_read_buffer_size_v2); 2116 } else { 2117 hci_send_cmd(&hci_le_read_buffer_size); 2118 } 2119 break; 2120 } 2121 2122 /* fall through */ 2123 2124 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2125 // skip write le host if not supported (e.g. on LE only EM9301) 2126 if (hci_le_supported() 2127 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2128 // LE Supported Host = 1, Simultaneous Host = 0 2129 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2130 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2131 break; 2132 } 2133 2134 /* fall through */ 2135 2136 case HCI_INIT_LE_SET_EVENT_MASK: 2137 if (hci_le_supported()){ 2138 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2139 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2140 break; 2141 } 2142 #endif 2143 2144 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2145 /* fall through */ 2146 2147 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2148 if (hci_le_supported() 2149 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2150 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2151 hci_send_cmd(&hci_le_read_maximum_data_length); 2152 break; 2153 } 2154 2155 /* fall through */ 2156 2157 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2158 if (hci_le_supported() 2159 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2160 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2161 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2162 break; 2163 } 2164 #endif 2165 2166 #ifdef ENABLE_LE_CENTRAL 2167 /* fall through */ 2168 2169 case HCI_INIT_READ_WHITE_LIST_SIZE: 2170 if (hci_le_supported()){ 2171 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2172 hci_send_cmd(&hci_le_read_white_list_size); 2173 break; 2174 } 2175 2176 #endif 2177 2178 #ifdef ENABLE_LE_PERIPHERAL 2179 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2180 /* fall through */ 2181 2182 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2183 if (hci_extended_advertising_supported()){ 2184 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2185 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2186 break; 2187 } 2188 #endif 2189 #endif 2190 /* fall through */ 2191 2192 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2193 case HCI_INIT_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS: 2194 if (hci_le_supported()) { 2195 hci_stack->substate = HCI_INIT_W4_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS; 2196 hci_send_cmd(&hci_le_set_host_feature, 32, 1); 2197 break; 2198 } 2199 #endif 2200 2201 /* fall through */ 2202 2203 case HCI_INIT_DONE: 2204 hci_stack->substate = HCI_INIT_DONE; 2205 // main init sequence complete 2206 #ifdef ENABLE_CLASSIC 2207 // check if initial Classic GAP Tasks are completed 2208 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2209 hci_run_gap_tasks_classic(); 2210 break; 2211 } 2212 #endif 2213 #ifdef ENABLE_BLE 2214 #ifdef ENABLE_LE_CENTRAL 2215 // check if initial LE GAP Tasks are completed 2216 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2217 hci_run_general_gap_le(); 2218 break; 2219 } 2220 #endif 2221 #endif 2222 hci_init_done(); 2223 break; 2224 2225 default: 2226 return; 2227 } 2228 } 2229 2230 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2231 bool command_completed = false; 2232 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2233 uint16_t opcode = little_endian_read_16(packet,3); 2234 if (opcode == hci_stack->last_cmd_opcode){ 2235 command_completed = true; 2236 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2237 } else { 2238 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2239 } 2240 } 2241 2242 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2243 uint8_t status = packet[2]; 2244 uint16_t opcode = little_endian_read_16(packet,4); 2245 if (opcode == hci_stack->last_cmd_opcode){ 2246 if (status){ 2247 command_completed = true; 2248 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2249 } else { 2250 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2251 } 2252 } else { 2253 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2254 } 2255 } 2256 #ifndef HAVE_HOST_CONTROLLER_API 2257 // Vendor == CSR 2258 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2259 // TODO: track actual command 2260 command_completed = true; 2261 } 2262 2263 // Vendor == Toshiba 2264 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2265 // TODO: track actual command 2266 command_completed = true; 2267 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2268 hci_stack->num_cmd_packets = 1; 2269 } 2270 #endif 2271 2272 return command_completed; 2273 } 2274 2275 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2276 2277 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2278 2279 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2280 2281 #ifndef HAVE_HOST_CONTROLLER_API 2282 2283 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2284 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2285 // 2286 // HCI Reset 2287 // Timeout 100 ms 2288 // HCI Reset 2289 // Command Complete Reset 2290 // HCI Read Local Version Information 2291 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2292 // hang... 2293 // 2294 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2295 if (!command_completed 2296 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2297 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2298 2299 uint16_t opcode = little_endian_read_16(packet,3); 2300 if (opcode == hci_reset.opcode){ 2301 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2302 return; 2303 } 2304 } 2305 2306 // CSR & H5 2307 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2308 if (!command_completed 2309 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2310 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2311 2312 uint16_t opcode = little_endian_read_16(packet,3); 2313 if (opcode == hci_reset.opcode){ 2314 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2315 return; 2316 } 2317 } 2318 2319 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2320 // fix: Correct substate and behave as command below 2321 if (command_completed){ 2322 switch (hci_stack->substate){ 2323 case HCI_INIT_SEND_RESET: 2324 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2325 break; 2326 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2327 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2328 break; 2329 default: 2330 break; 2331 } 2332 } 2333 2334 #endif 2335 2336 if (!command_completed) return; 2337 2338 bool need_baud_change = false; 2339 bool need_addr_change = false; 2340 2341 #ifndef HAVE_HOST_CONTROLLER_API 2342 need_baud_change = hci_stack->config 2343 && hci_stack->chipset 2344 && hci_stack->chipset->set_baudrate_command 2345 && hci_stack->hci_transport->set_baudrate 2346 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2347 2348 need_addr_change = hci_stack->custom_bd_addr_set 2349 && hci_stack->chipset 2350 && hci_stack->chipset->set_bd_addr_command; 2351 #endif 2352 2353 switch(hci_stack->substate){ 2354 2355 #ifndef HAVE_HOST_CONTROLLER_API 2356 case HCI_INIT_SEND_RESET: 2357 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2358 // fix: just correct substate and behave as command below 2359 2360 /* fall through */ 2361 #endif 2362 2363 case HCI_INIT_W4_SEND_RESET: 2364 btstack_run_loop_remove_timer(&hci_stack->timeout); 2365 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2366 return; 2367 2368 #ifndef HAVE_HOST_CONTROLLER_API 2369 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2370 // for STLC2500D, baud rate change already happened. 2371 // for others, baud rate gets changed now 2372 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2373 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2374 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2375 hci_stack->hci_transport->set_baudrate(baud_rate); 2376 } 2377 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2378 return; 2379 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2380 btstack_run_loop_remove_timer(&hci_stack->timeout); 2381 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2382 return; 2383 case HCI_INIT_W4_CUSTOM_INIT: 2384 // repeat custom init 2385 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2386 return; 2387 #endif 2388 2389 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2390 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2391 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2392 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2393 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2394 return; 2395 } 2396 if (need_addr_change){ 2397 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2398 return; 2399 } 2400 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2401 return; 2402 #ifndef HAVE_HOST_CONTROLLER_API 2403 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2404 if (need_baud_change){ 2405 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2406 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2407 hci_stack->hci_transport->set_baudrate(baud_rate); 2408 } 2409 if (need_addr_change){ 2410 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2411 return; 2412 } 2413 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2414 return; 2415 case HCI_INIT_W4_SET_BD_ADDR: 2416 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2417 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2418 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2419 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2420 return; 2421 } 2422 // skipping st warm boot 2423 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2424 return; 2425 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2426 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2427 return; 2428 #endif 2429 2430 case HCI_INIT_DONE: 2431 // set state if we came here by fall through 2432 hci_stack->substate = HCI_INIT_DONE; 2433 return; 2434 2435 default: 2436 break; 2437 } 2438 hci_initializing_next_state(); 2439 } 2440 2441 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2442 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2443 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2444 // check if we have been aware of the HCI connection 2445 switch (conn->state){ 2446 case SENT_CREATE_CONNECTION: 2447 case RECEIVED_CONNECTION_REQUEST: 2448 break; 2449 default: 2450 return; 2451 } 2452 2453 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2454 bd_addr_t bd_address; 2455 (void)memcpy(&bd_address, conn->address, 6); 2456 2457 #ifdef ENABLE_CLASSIC 2458 // cache needed data 2459 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2460 #endif 2461 2462 // connection failed, remove entry 2463 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2464 btstack_memory_hci_connection_free( conn ); 2465 2466 #ifdef ENABLE_CLASSIC 2467 // notify client if dedicated bonding 2468 if (notify_dedicated_bonding_failed){ 2469 log_info("hci notify_dedicated_bonding_failed"); 2470 hci_emit_dedicated_bonding_result(bd_address, status); 2471 } 2472 2473 // if authentication error, also delete link key 2474 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2475 gap_drop_link_key_for_bd_addr(bd_address); 2476 } 2477 #else 2478 UNUSED(status); 2479 #endif 2480 } 2481 2482 #ifdef ENABLE_CLASSIC 2483 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2484 // SSP Controller 2485 if (features[6] & (1 << 3)){ 2486 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2487 } 2488 // eSCO 2489 if (features[3] & (1<<7)){ 2490 conn->remote_supported_features[0] |= 1; 2491 } 2492 // Extended features 2493 if (features[7] & (1<<7)){ 2494 conn->remote_supported_features[0] |= 2; 2495 } 2496 } 2497 2498 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2499 // SSP Host 2500 if (features[0] & (1 << 0)){ 2501 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2502 } 2503 // SC Host 2504 if (features[0] & (1 << 3)){ 2505 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2506 } 2507 } 2508 2509 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2510 // SC Controller 2511 if (features[1] & (1 << 0)){ 2512 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2513 } 2514 } 2515 2516 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2517 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2518 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2519 log_info("Remote features %02x, bonding flags %" PRIx32, conn->remote_supported_features[0], conn->bonding_flags); 2520 if (conn->bonding_flags & BONDING_DEDICATED){ 2521 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2522 } 2523 } 2524 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2525 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2526 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2527 } 2528 2529 #endif 2530 2531 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2532 // handle BT initialization 2533 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2534 hci_initializing_event_handler(packet, size); 2535 } 2536 2537 // help with BT sleep 2538 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2539 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2540 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2541 && (hci_event_command_complete_get_command_opcode(packet) == HCI_OPCODE_HCI_WRITE_SCAN_ENABLE)){ 2542 hci_initializing_next_state(); 2543 } 2544 } 2545 2546 #ifdef ENABLE_CLASSIC 2547 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2548 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2549 conn->encryption_key_size = encryption_key_size; 2550 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2551 2552 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2553 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2554 conn->bonding_flags &= ~BONDING_DEDICATED; 2555 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2556 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2557 return; 2558 } 2559 2560 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2561 conn->requested_security_level = LEVEL_0; 2562 hci_emit_security_level(conn->con_handle, security_level); 2563 return; 2564 } 2565 2566 // Request remote features if not already done 2567 hci_trigger_remote_features_for_connection(conn); 2568 2569 // Request Authentication if not already done 2570 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2571 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2572 } 2573 #endif 2574 2575 static void hci_store_local_supported_commands(const uint8_t * packet){ 2576 // create mapping table 2577 #define X(name, offset, bit) { offset, bit }, 2578 static struct { 2579 uint8_t byte_offset; 2580 uint8_t bit_position; 2581 } supported_hci_commands_map [] = { 2582 SUPPORTED_HCI_COMMANDS 2583 }; 2584 #undef X 2585 2586 // create names for debug purposes 2587 #ifdef ENABLE_LOG_DEBUG 2588 #define X(name, offset, bit) #name, 2589 static const char * command_names[] = { 2590 SUPPORTED_HCI_COMMANDS 2591 }; 2592 #undef X 2593 #endif 2594 2595 hci_stack->local_supported_commands = 0; 2596 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2597 uint16_t i; 2598 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2599 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2600 #ifdef ENABLE_LOG_DEBUG 2601 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); 2602 #else 2603 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2604 #endif 2605 hci_stack->local_supported_commands |= (1LU << i); 2606 } 2607 } 2608 log_info("Local supported commands summary %08" PRIx32, hci_stack->local_supported_commands); 2609 } 2610 2611 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2612 UNUSED(size); 2613 2614 uint16_t manufacturer; 2615 #ifdef ENABLE_CLASSIC 2616 hci_con_handle_t handle; 2617 hci_connection_t * conn; 2618 #endif 2619 #if defined(ENABLE_CLASSIC) || (defined(ENABLE_BLE) && defined(ENABLE_LE_ISOCHRONOUS_STREAMS)) 2620 uint8_t status; 2621 #endif 2622 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2623 le_audio_cig_t * cig; 2624 #endif 2625 2626 // get num cmd packets - limit to 1 to reduce complexity 2627 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2628 2629 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2630 switch (opcode){ 2631 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2632 if (packet[5]) break; 2633 // terminate, name 248 chars 2634 packet[6+248] = 0; 2635 log_info("local name: %s", &packet[6]); 2636 break; 2637 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2638 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2639 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2640 uint16_t acl_len = little_endian_read_16(packet, 6); 2641 uint16_t sco_len = packet[8]; 2642 2643 // determine usable ACL/SCO payload size 2644 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2645 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2646 2647 hci_stack->acl_packets_total_num = (uint8_t) btstack_min(little_endian_read_16(packet, 9), MAX_NR_CONTROLLER_ACL_BUFFERS); 2648 hci_stack->sco_packets_total_num = (uint8_t) btstack_min(little_endian_read_16(packet, 11), MAX_NR_CONTROLLER_SCO_PACKETS); 2649 2650 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2651 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2652 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2653 } 2654 break; 2655 case HCI_OPCODE_HCI_READ_RSSI: 2656 if (packet[5] == ERROR_CODE_SUCCESS){ 2657 uint8_t event[5]; 2658 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2659 event[1] = 3; 2660 (void)memcpy(&event[2], &packet[6], 3); 2661 hci_emit_event(event, sizeof(event), 1); 2662 } 2663 break; 2664 #ifdef ENABLE_BLE 2665 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2666 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2667 hci_stack->le_iso_packets_total_num = packet[11]; 2668 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2669 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2670 2671 /* fall through */ 2672 2673 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2674 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2675 hci_stack->le_acl_packets_total_num = packet[8]; 2676 // determine usable ACL payload size 2677 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2678 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2679 } 2680 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); 2681 break; 2682 #endif 2683 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2684 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2685 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2686 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2687 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); 2688 break; 2689 #endif 2690 #ifdef ENABLE_LE_CENTRAL 2691 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2692 hci_stack->le_whitelist_capacity = packet[6]; 2693 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2694 break; 2695 #endif 2696 #ifdef ENABLE_LE_PERIPHERAL 2697 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2698 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2699 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2700 break; 2701 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2702 if (hci_stack->le_advertising_set_in_current_command != 0) { 2703 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2704 hci_stack->le_advertising_set_in_current_command = 0; 2705 if (advertising_set == NULL) break; 2706 uint8_t adv_status = packet[6]; 2707 uint8_t tx_power = packet[7]; 2708 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 }; 2709 if (adv_status == 0){ 2710 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2711 } 2712 hci_emit_event(event, sizeof(event), 1); 2713 } 2714 break; 2715 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2716 if (hci_stack->le_advertising_set_in_current_command != 0) { 2717 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2718 hci_stack->le_advertising_set_in_current_command = 0; 2719 if (advertising_set == NULL) break; 2720 uint8_t adv_status = packet[5]; 2721 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2722 if (adv_status == 0){ 2723 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2724 } 2725 hci_emit_event(event, sizeof(event), 1); 2726 } 2727 break; 2728 #endif 2729 #endif 2730 case HCI_OPCODE_HCI_READ_BD_ADDR: 2731 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2732 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)); 2733 #ifdef ENABLE_CLASSIC 2734 if (hci_stack->link_key_db){ 2735 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2736 } 2737 #endif 2738 break; 2739 #ifdef ENABLE_CLASSIC 2740 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2741 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 2742 break; 2743 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2744 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2745 if (status == ERROR_CODE_SUCCESS) { 2746 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2747 } else { 2748 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2749 } 2750 break; 2751 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2752 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2753 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2754 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2755 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2756 hci_emit_event(event, sizeof(event), 1); 2757 } 2758 break; 2759 #endif 2760 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2761 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2762 2763 #ifdef ENABLE_CLASSIC 2764 // determine usable ACL packet types based on host buffer size and supported features 2765 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2766 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2767 #endif 2768 // Classic/LE 2769 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2770 break; 2771 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2772 manufacturer = little_endian_read_16(packet, 10); 2773 // map Cypress to Broadcom 2774 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2775 log_info("Treat Cypress as Broadcom"); 2776 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2777 little_endian_store_16(packet, 10, manufacturer); 2778 } 2779 hci_stack->manufacturer = manufacturer; 2780 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2781 break; 2782 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2783 hci_store_local_supported_commands(packet); 2784 break; 2785 #ifdef ENABLE_CLASSIC 2786 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2787 if (packet[5]) return; 2788 hci_stack->synchronous_flow_control_enabled = 1; 2789 break; 2790 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2791 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2792 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2793 conn = hci_connection_for_handle(handle); 2794 if (conn != NULL) { 2795 uint8_t key_size = 0; 2796 if (status == 0){ 2797 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2798 log_info("Handle %04x key Size: %u", handle, key_size); 2799 } else { 2800 key_size = 1; 2801 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2802 } 2803 hci_handle_read_encryption_key_size_complete(conn, key_size); 2804 } 2805 break; 2806 // assert pairing complete event is emitted. 2807 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2808 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2809 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2810 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2811 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2812 // lookup connection by gap pairing addr 2813 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2814 if (conn == NULL) break; 2815 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2816 break; 2817 2818 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2819 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2820 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2821 uint8_t event[67]; 2822 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2823 event[1] = 65; 2824 (void)memset(&event[2], 0, 65); 2825 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2826 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2827 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2828 event[2] = 3; 2829 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2830 } else { 2831 event[2] = 1; 2832 } 2833 } 2834 hci_emit_event(event, sizeof(event), 0); 2835 break; 2836 } 2837 2838 // note: only needed if user does not provide OOB data 2839 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2840 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2841 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2842 if (conn == NULL) break; 2843 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2844 break; 2845 #endif 2846 #endif 2847 #ifdef ENABLE_BLE 2848 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2849 case HCI_OPCODE_HCI_LE_SET_CIG_PARAMETERS: 2850 // lookup CIG 2851 cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 2852 if (cig != NULL){ 2853 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2854 uint8_t i = 0; 2855 if (status == ERROR_CODE_SUCCESS){ 2856 // assign CIS handles to pre-allocated CIS 2857 btstack_linked_list_iterator_t it; 2858 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 2859 while (btstack_linked_list_iterator_has_next(&it) && (i < cig->num_cis)) { 2860 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 2861 if ((iso_stream->group_id == hci_stack->iso_active_operation_group_id) && 2862 (iso_stream->iso_type == HCI_ISO_TYPE_CIS)){ 2863 hci_con_handle_t cis_handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3+(2*i)); 2864 iso_stream->con_handle = cis_handle; 2865 cig->cis_con_handles[i] = cis_handle; 2866 i++; 2867 } 2868 } 2869 cig->state = LE_AUDIO_CIG_STATE_W4_CIS_REQUEST; 2870 hci_emit_cig_created(cig, status); 2871 } else { 2872 hci_emit_cig_created(cig, status); 2873 btstack_linked_list_remove(&hci_stack->le_audio_cigs, (btstack_linked_item_t *) cig); 2874 } 2875 } 2876 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2877 break; 2878 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2879 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2880 if (status != ERROR_CODE_SUCCESS){ 2881 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 2882 } 2883 break; 2884 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2885 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2886 if (status != ERROR_CODE_SUCCESS){ 2887 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 2888 } 2889 break; 2890 case HCI_OPCODE_HCI_LE_SETUP_ISO_DATA_PATH: { 2891 // lookup BIG by state 2892 btstack_linked_list_iterator_t it; 2893 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 2894 while (btstack_linked_list_iterator_has_next(&it)) { 2895 le_audio_big_t *big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 2896 if (big->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2897 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2898 if (status == ERROR_CODE_SUCCESS){ 2899 big->state_vars.next_bis++; 2900 if (big->state_vars.next_bis == big->num_bis){ 2901 big->state = LE_AUDIO_BIG_STATE_ACTIVE; 2902 hci_emit_big_created(big, ERROR_CODE_SUCCESS); 2903 } else { 2904 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2905 } 2906 } else { 2907 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2908 big->state_vars.status = status; 2909 } 2910 return; 2911 } 2912 } 2913 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2914 while (btstack_linked_list_iterator_has_next(&it)) { 2915 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2916 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2917 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2918 if (status == ERROR_CODE_SUCCESS){ 2919 big_sync->state_vars.next_bis++; 2920 if (big_sync->state_vars.next_bis == big_sync->num_bis){ 2921 big_sync->state = LE_AUDIO_BIG_STATE_ACTIVE; 2922 hci_emit_big_sync_created(big_sync, ERROR_CODE_SUCCESS); 2923 } else { 2924 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2925 } 2926 } else { 2927 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2928 big_sync->state_vars.status = status; 2929 } 2930 return; 2931 } 2932 } 2933 // Lookup CIS via active group operation 2934 if (hci_stack->iso_active_operation_type == HCI_ISO_TYPE_CIS){ 2935 if (hci_stack->iso_active_operation_group_id == HCI_ISO_GROUP_ID_SINGLE_CIS){ 2936 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2937 2938 // lookup CIS by state 2939 btstack_linked_list_iterator_t it; 2940 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 2941 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2942 while (btstack_linked_list_iterator_has_next(&it)){ 2943 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 2944 handle = iso_stream->con_handle; 2945 switch (iso_stream->state){ 2946 case HCI_ISO_STREAM_STATE_W4_ISO_SETUP_INPUT: 2947 if (status != ERROR_CODE_SUCCESS){ 2948 hci_iso_stream_finalize(iso_stream); 2949 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, status); 2950 break; 2951 } 2952 if (iso_stream->max_sdu_c_to_p > 0){ 2953 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT; 2954 } else { 2955 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, ERROR_CODE_SUCCESS); 2956 } 2957 break; 2958 case HCI_ISO_STREAM_STATE_W4_ISO_SETUP_OUTPUT: 2959 if (status != ERROR_CODE_SUCCESS){ 2960 hci_iso_stream_finalize(iso_stream); 2961 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, status); 2962 break; 2963 } 2964 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, ERROR_CODE_SUCCESS); 2965 break; 2966 default: 2967 break; 2968 } 2969 } 2970 } else { 2971 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2972 cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 2973 if (cig != NULL) { 2974 // emit cis created if all ISO Paths have been created 2975 // assume we are central 2976 uint8_t cis_index = cig->state_vars.next_cis >> 1; 2977 uint8_t cis_direction = cig->state_vars.next_cis & 1; 2978 bool outgoing_needed = cig->params->cis_params[cis_index].max_sdu_p_to_c > 0; 2979 // if outgoing has been setup, or incoming was setup but outgoing not required 2980 if ((cis_direction == 1) || (outgoing_needed == false)){ 2981 hci_emit_cis_created(cig->cig_id, cig->cis_con_handles[cis_index], status); 2982 } 2983 // next state 2984 cig->state_vars.next_cis++; 2985 cig->state = LE_AUDIO_CIG_STATE_SETUP_ISO_PATH; 2986 } 2987 } 2988 } 2989 break; 2990 } 2991 case HCI_OPCODE_HCI_LE_BIG_TERMINATE_SYNC: { 2992 // lookup BIG by state 2993 btstack_linked_list_iterator_t it; 2994 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2995 while (btstack_linked_list_iterator_has_next(&it)) { 2996 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2997 uint8_t big_handle = big_sync->big_handle; 2998 switch (big_sync->state){ 2999 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 3000 btstack_linked_list_iterator_remove(&it); 3001 hci_emit_big_sync_created(big_sync, big_sync->state_vars.status); 3002 return; 3003 default: 3004 btstack_linked_list_iterator_remove(&it); 3005 hci_emit_big_sync_stopped(big_handle); 3006 return; 3007 } 3008 } 3009 break; 3010 } 3011 #endif 3012 #endif 3013 default: 3014 break; 3015 } 3016 } 3017 3018 static void handle_command_status_event(uint8_t * packet, uint16_t size) { 3019 UNUSED(size); 3020 3021 // get num cmd packets - limit to 1 to reduce complexity 3022 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 3023 3024 // get opcode and command status 3025 uint16_t opcode = hci_event_command_status_get_command_opcode(packet); 3026 3027 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) || defined(ENABLE_LE_ISOCHRONOUS_STREAMS) 3028 uint8_t status = hci_event_command_status_get_status(packet); 3029 #endif 3030 3031 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 3032 bd_addr_type_t addr_type; 3033 #endif 3034 3035 switch (opcode){ 3036 #ifdef ENABLE_CLASSIC 3037 case HCI_OPCODE_HCI_CREATE_CONNECTION: 3038 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 3039 #endif 3040 #ifdef ENABLE_LE_CENTRAL 3041 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 3042 #endif 3043 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 3044 addr_type = hci_stack->outgoing_addr_type; 3045 3046 // reset outgoing address info 3047 memset(hci_stack->outgoing_addr, 0, 6); 3048 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 3049 3050 // on error 3051 if (status != ERROR_CODE_SUCCESS){ 3052 #ifdef ENABLE_LE_CENTRAL 3053 if (hci_is_le_connection_type(addr_type)){ 3054 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3055 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3056 } 3057 #endif 3058 // error => outgoing connection failed 3059 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 3060 if (conn != NULL){ 3061 hci_handle_connection_failed(conn, status); 3062 } 3063 } 3064 break; 3065 #endif 3066 #ifdef ENABLE_CLASSIC 3067 case HCI_OPCODE_HCI_INQUIRY: 3068 if (status == ERROR_CODE_SUCCESS) { 3069 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3070 } else { 3071 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3072 } 3073 break; 3074 #endif 3075 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3076 case HCI_OPCODE_HCI_LE_CREATE_CIS: 3077 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 3078 if (status == ERROR_CODE_SUCCESS){ 3079 hci_iso_stream_requested_confirm(HCI_ISO_GROUP_ID_INVALID); 3080 } else { 3081 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 3082 } 3083 break; 3084 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 3085 default: 3086 break; 3087 } 3088 } 3089 3090 #ifdef ENABLE_BLE 3091 static void event_handle_le_connection_complete(const uint8_t * packet){ 3092 bd_addr_t addr; 3093 bd_addr_type_t addr_type; 3094 hci_connection_t * conn; 3095 3096 // Connection management 3097 reverse_bd_addr(&packet[8], addr); 3098 addr_type = (bd_addr_type_t)packet[7]; 3099 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 3100 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3101 3102 #ifdef ENABLE_LE_CENTRAL 3103 // handle error: error is reported only to the initiator -> outgoing connection 3104 if (packet[3]){ 3105 3106 // handle cancelled outgoing connection 3107 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 3108 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 3109 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 3110 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 3111 // reset state 3112 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3113 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3114 // get outgoing connection conn struct for direct connect 3115 conn = gap_get_outgoing_connection(); 3116 } 3117 3118 // outgoing le connection establishment is done 3119 if (conn){ 3120 // remove entry 3121 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3122 btstack_memory_hci_connection_free( conn ); 3123 } 3124 return; 3125 } 3126 #endif 3127 3128 // on success, both hosts receive connection complete event 3129 if (packet[6] == HCI_ROLE_MASTER){ 3130 #ifdef ENABLE_LE_CENTRAL 3131 // if we're master on an le connection, it was an outgoing connection and we're done with it 3132 // note: no hci_connection_t object exists yet for connect with whitelist 3133 if (hci_is_le_connection_type(addr_type)){ 3134 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3135 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3136 } 3137 #endif 3138 } else { 3139 #ifdef ENABLE_LE_PERIPHERAL 3140 // if we're slave, it was an incoming connection, advertisements have stopped 3141 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3142 #endif 3143 } 3144 3145 // LE connections are auto-accepted, so just create a connection if there isn't one already 3146 if (!conn){ 3147 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3148 } 3149 3150 // no memory, sorry. 3151 if (!conn){ 3152 return; 3153 } 3154 3155 conn->state = OPEN; 3156 conn->role = packet[6]; 3157 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 3158 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 3159 3160 // workaround: PAST doesn't work without LE Read Remote Features on PacketCraft Controller with LMP 568B 3161 conn->gap_connection_tasks = GAP_CONNECTION_TASK_LE_READ_REMOTE_FEATURES; 3162 3163 #ifdef ENABLE_LE_PERIPHERAL 3164 if (packet[6] == HCI_ROLE_SLAVE){ 3165 hci_update_advertisements_enabled_for_current_roles(); 3166 } 3167 #endif 3168 3169 // init unenhanced att bearer mtu 3170 conn->att_connection.mtu = ATT_DEFAULT_MTU; 3171 conn->att_connection.mtu_exchanged = false; 3172 3173 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 3174 3175 // restart timer 3176 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3177 // btstack_run_loop_add_timer(&conn->timeout); 3178 3179 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3180 3181 hci_emit_nr_connections_changed(); 3182 } 3183 #endif 3184 3185 #ifdef ENABLE_CLASSIC 3186 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){ 3187 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 3188 // LEVEL_4 is tested by l2cap 3189 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 3190 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 3191 if (level >= LEVEL_3){ 3192 // MITM not possible without keyboard or display 3193 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3194 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3195 3196 // MITM possible if one side has keyboard and the other has keyboard or display 3197 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3198 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3199 3200 // MITM not possible if one side has only display and other side has no keyboard 3201 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3202 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3203 } 3204 // LEVEL 2 requires SSP, which is a given 3205 return true; 3206 } 3207 3208 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 3209 // get requested security level 3210 gap_security_level_t requested_security_level = conn->requested_security_level; 3211 if (hci_stack->gap_secure_connections_only_mode){ 3212 requested_security_level = LEVEL_4; 3213 } 3214 3215 // assess security: LEVEL 4 requires SC 3216 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 3217 if ((requested_security_level == LEVEL_4) && 3218 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 3219 !hci_remote_sc_enabled(conn)){ 3220 log_info("Level 4 required, but SC not supported -> abort"); 3221 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3222 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3223 return; 3224 } 3225 3226 // assess security based on io capabilities 3227 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 3228 // responder: fully validate io caps of both sides as well as OOB data 3229 bool security_possible = false; 3230 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 3231 3232 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3233 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 3234 // so we merge the OOB data availability 3235 uint8_t have_oob_data = conn->io_cap_response_oob_data; 3236 if (conn->classic_oob_c_192 != NULL){ 3237 have_oob_data |= 1; 3238 } 3239 if (conn->classic_oob_c_256 != NULL){ 3240 have_oob_data |= 2; 3241 } 3242 // for up to Level 3, either P-192 as well as P-256 will do 3243 // 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 3244 // if remote does not SC, we should not receive P-256 data either 3245 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 3246 security_possible = true; 3247 } 3248 // for Level 4, P-256 is needed 3249 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 3250 security_possible = true; 3251 } 3252 #endif 3253 3254 if (security_possible == false){ 3255 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 3256 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3257 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3258 return; 3259 } 3260 } else { 3261 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 3262 #ifndef ENABLE_CLASSIC_PAIRING_OOB 3263 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3264 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 3265 log_info("Level 3+ required, but no input/output -> abort"); 3266 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3267 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3268 return; 3269 } 3270 #endif 3271 #endif 3272 } 3273 3274 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3275 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 3276 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 3277 } else { 3278 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3279 } 3280 #endif 3281 } 3282 3283 #endif 3284 3285 static void event_handler(uint8_t *packet, uint16_t size){ 3286 3287 uint16_t event_length = packet[1]; 3288 3289 // assert packet is complete 3290 if (size != (event_length + 2u)){ 3291 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 3292 return; 3293 } 3294 3295 hci_con_handle_t handle; 3296 hci_connection_t * conn; 3297 int i; 3298 3299 #ifdef ENABLE_CLASSIC 3300 hci_link_type_t link_type; 3301 bd_addr_t addr; 3302 bd_addr_type_t addr_type; 3303 #endif 3304 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3305 hci_iso_stream_t * iso_stream; 3306 le_audio_big_t * big; 3307 le_audio_big_sync_t * big_sync; 3308 #endif 3309 3310 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 3311 3312 switch (hci_event_packet_get_type(packet)) { 3313 3314 case HCI_EVENT_COMMAND_COMPLETE: 3315 handle_command_complete_event(packet, size); 3316 break; 3317 3318 case HCI_EVENT_COMMAND_STATUS: 3319 handle_command_status_event(packet, size); 3320 break; 3321 3322 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3323 if (size < 3) return; 3324 uint16_t num_handles = packet[2]; 3325 if (size != (3u + num_handles * 4u)) return; 3326 #ifdef ENABLE_CLASSIC 3327 bool notify_sco = false; 3328 #endif 3329 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3330 bool notify_iso = false; 3331 #endif 3332 uint16_t offset = 3; 3333 for (i=0; i<num_handles;i++){ 3334 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3335 offset += 2u; 3336 uint16_t num_packets = little_endian_read_16(packet, offset); 3337 offset += 2u; 3338 3339 conn = hci_connection_for_handle(handle); 3340 if (conn != NULL) { 3341 3342 if (conn->num_packets_sent >= num_packets) { 3343 conn->num_packets_sent -= num_packets; 3344 } else { 3345 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3346 conn->num_packets_sent = 0; 3347 } 3348 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3349 #ifdef ENABLE_CLASSIC 3350 if (conn->address_type == BD_ADDR_TYPE_SCO){ 3351 notify_sco = true; 3352 } 3353 #endif 3354 } 3355 3356 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 3357 hci_controller_dump_packets(); 3358 #endif 3359 3360 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3361 if (conn == NULL){ 3362 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(handle); 3363 if (iso_stream != NULL){ 3364 if (iso_stream->num_packets_sent >= num_packets) { 3365 iso_stream->num_packets_sent -= num_packets; 3366 } else { 3367 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3368 iso_stream->num_packets_sent = 0; 3369 } 3370 if (iso_stream->iso_type == HCI_ISO_TYPE_BIS){ 3371 le_audio_big_t * big = hci_big_for_handle(iso_stream->group_id); 3372 if (big != NULL){ 3373 big->num_completed_timestamp_current_valid = true; 3374 big->num_completed_timestamp_current_ms = btstack_run_loop_get_time_ms(); 3375 } 3376 } 3377 log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", 3378 num_packets, handle, iso_stream->num_packets_sent); 3379 notify_iso = true; 3380 } 3381 } 3382 #endif 3383 } 3384 3385 #ifdef ENABLE_CLASSIC 3386 if (notify_sco){ 3387 hci_notify_if_sco_can_send_now(); 3388 } 3389 #endif 3390 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3391 if (notify_iso){ 3392 hci_iso_notify_can_send_now(); 3393 } 3394 #endif 3395 break; 3396 } 3397 3398 #ifdef ENABLE_CLASSIC 3399 case HCI_EVENT_FLUSH_OCCURRED: 3400 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3401 handle = hci_event_flush_occurred_get_handle(packet); 3402 conn = hci_connection_for_handle(handle); 3403 if (conn) { 3404 log_info("Flush occurred, disconnect 0x%04x", handle); 3405 conn->state = SEND_DISCONNECT; 3406 } 3407 break; 3408 3409 case HCI_EVENT_INQUIRY_COMPLETE: 3410 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3411 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3412 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3413 hci_emit_event(event, sizeof(event), 1); 3414 } 3415 break; 3416 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3417 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3418 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3419 } 3420 break; 3421 case HCI_EVENT_CONNECTION_REQUEST: 3422 reverse_bd_addr(&packet[2], addr); 3423 link_type = (hci_link_type_t) packet[11]; 3424 3425 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3426 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3427 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3428 bd_addr_copy(hci_stack->decline_addr, addr); 3429 break; 3430 } 3431 3432 if (hci_stack->gap_classic_accept_callback != NULL){ 3433 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3434 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS; 3435 bd_addr_copy(hci_stack->decline_addr, addr); 3436 break; 3437 } 3438 } 3439 3440 // TODO: eval COD 8-10 3441 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3442 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3443 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3444 if (!conn) { 3445 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3446 } 3447 if (!conn) { 3448 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3449 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3450 bd_addr_copy(hci_stack->decline_addr, addr); 3451 hci_run(); 3452 // avoid event to higher layer 3453 return; 3454 } 3455 conn->role = HCI_ROLE_SLAVE; 3456 conn->state = RECEIVED_CONNECTION_REQUEST; 3457 // store info about eSCO 3458 if (link_type == HCI_LINK_TYPE_ESCO){ 3459 conn->remote_supported_features[0] |= 1; 3460 } 3461 hci_run(); 3462 break; 3463 3464 case HCI_EVENT_CONNECTION_COMPLETE: 3465 // Connection management 3466 reverse_bd_addr(&packet[5], addr); 3467 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3468 addr_type = BD_ADDR_TYPE_ACL; 3469 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3470 if (conn) { 3471 switch (conn->state){ 3472 // expected states 3473 case ACCEPTED_CONNECTION_REQUEST: 3474 case SENT_CREATE_CONNECTION: 3475 break; 3476 // unexpected state -> ignore 3477 default: 3478 // don't forward event to app 3479 return; 3480 } 3481 if (!packet[2]){ 3482 conn->state = OPEN; 3483 conn->con_handle = little_endian_read_16(packet, 3); 3484 3485 // trigger write supervision timeout if we're master 3486 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3487 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3488 } 3489 3490 // trigger write automatic flush timeout 3491 if (hci_stack->automatic_flush_timeout != 0){ 3492 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3493 } 3494 3495 // restart timer 3496 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3497 btstack_run_loop_add_timer(&conn->timeout); 3498 3499 // trigger remote features for dedicated bonding 3500 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3501 hci_trigger_remote_features_for_connection(conn); 3502 } 3503 3504 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3505 3506 hci_emit_nr_connections_changed(); 3507 } else { 3508 // connection failed 3509 hci_handle_connection_failed(conn, packet[2]); 3510 } 3511 } 3512 break; 3513 3514 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3515 reverse_bd_addr(&packet[5], addr); 3516 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3517 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3518 if (packet[2]){ 3519 // connection failed 3520 if (conn){ 3521 hci_handle_connection_failed(conn, packet[2]); 3522 } 3523 break; 3524 } 3525 if (!conn) { 3526 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3527 } 3528 if (!conn) { 3529 break; 3530 } 3531 conn->state = OPEN; 3532 conn->con_handle = little_endian_read_16(packet, 3); 3533 3534 #ifdef ENABLE_SCO_OVER_HCI 3535 // update SCO 3536 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3537 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3538 } 3539 // trigger can send now 3540 if (hci_have_usb_transport()){ 3541 hci_stack->sco_can_send_now = true; 3542 } 3543 #endif 3544 #ifdef HAVE_SCO_TRANSPORT 3545 // configure sco transport 3546 if (hci_stack->sco_transport != NULL){ 3547 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3548 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3549 } 3550 #endif 3551 break; 3552 3553 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3554 handle = little_endian_read_16(packet, 3); 3555 conn = hci_connection_for_handle(handle); 3556 if (!conn) break; 3557 if (!packet[2]){ 3558 const uint8_t * features = &packet[5]; 3559 hci_handle_remote_features_page_0(conn, features); 3560 3561 // read extended features if possible 3562 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3563 && ((conn->remote_supported_features[0] & 2) != 0)) { 3564 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3565 break; 3566 } 3567 } 3568 hci_handle_remote_features_received(conn); 3569 break; 3570 3571 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3572 handle = little_endian_read_16(packet, 3); 3573 conn = hci_connection_for_handle(handle); 3574 if (!conn) break; 3575 // status = ok, page = 1 3576 if (!packet[2]) { 3577 uint8_t page_number = packet[5]; 3578 uint8_t maximum_page_number = packet[6]; 3579 const uint8_t * features = &packet[7]; 3580 bool done = false; 3581 switch (page_number){ 3582 case 1: 3583 hci_handle_remote_features_page_1(conn, features); 3584 if (maximum_page_number >= 2){ 3585 // get Secure Connections (Controller) from Page 2 if available 3586 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3587 } else { 3588 // otherwise, assume SC (Controller) == SC (Host) 3589 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3590 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3591 } 3592 done = true; 3593 } 3594 break; 3595 case 2: 3596 hci_handle_remote_features_page_2(conn, features); 3597 done = true; 3598 break; 3599 default: 3600 break; 3601 } 3602 if (!done) break; 3603 } 3604 hci_handle_remote_features_received(conn); 3605 break; 3606 3607 case HCI_EVENT_LINK_KEY_REQUEST: 3608 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3609 hci_event_link_key_request_get_bd_addr(packet, addr); 3610 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3611 if (!conn) break; 3612 3613 // lookup link key in db if not cached 3614 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3615 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3616 } 3617 3618 // response sent by hci_run() 3619 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3620 #endif 3621 break; 3622 3623 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3624 hci_event_link_key_request_get_bd_addr(packet, addr); 3625 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3626 if (!conn) break; 3627 3628 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3629 3630 // CVE-2020-26555: ignore NULL link key 3631 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3632 if (btstack_is_null(&packet[8], 16)) break; 3633 3634 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3635 // Change Connection Encryption keeps link key type 3636 if (link_key_type != CHANGED_COMBINATION_KEY){ 3637 conn->link_key_type = link_key_type; 3638 } 3639 3640 // cache link key. link keys stored in little-endian format for legacy reasons 3641 memcpy(&conn->link_key, &packet[8], 16); 3642 3643 // only store link key: 3644 // - if bondable enabled 3645 if (hci_stack->bondable == false) break; 3646 // - if security level sufficient 3647 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3648 // - for SSP, also check if remote side requested bonding as well 3649 if (conn->link_key_type != COMBINATION_KEY){ 3650 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3651 if (!remote_bonding){ 3652 break; 3653 } 3654 } 3655 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3656 break; 3657 } 3658 3659 case HCI_EVENT_PIN_CODE_REQUEST: 3660 hci_event_pin_code_request_get_bd_addr(packet, addr); 3661 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3662 if (!conn) break; 3663 3664 hci_pairing_started(conn, false); 3665 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3666 if (!hci_stack->bondable ){ 3667 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3668 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3669 hci_run(); 3670 return; 3671 } 3672 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3673 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3674 log_info("Level 4 required, but SC not supported -> abort"); 3675 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3676 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3677 hci_run(); 3678 return; 3679 } 3680 break; 3681 3682 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3683 hci_event_io_capability_response_get_bd_addr(packet, addr); 3684 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3685 if (!conn) break; 3686 3687 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3688 hci_pairing_started(conn, true); 3689 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3690 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3691 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3692 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3693 #endif 3694 break; 3695 3696 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3697 hci_event_io_capability_response_get_bd_addr(packet, addr); 3698 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3699 if (!conn) break; 3700 3701 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3702 hci_connection_timestamp(conn); 3703 hci_pairing_started(conn, true); 3704 break; 3705 3706 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3707 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3708 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3709 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3710 if (!conn) break; 3711 3712 hci_connection_timestamp(conn); 3713 3714 hci_pairing_started(conn, true); 3715 3716 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3717 break; 3718 #endif 3719 3720 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3721 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3722 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3723 if (!conn) break; 3724 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3725 if (hci_stack->ssp_auto_accept){ 3726 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3727 }; 3728 } else { 3729 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3730 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3731 // don't forward event to app 3732 hci_run(); 3733 return; 3734 } 3735 break; 3736 3737 case HCI_EVENT_USER_PASSKEY_REQUEST: 3738 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3739 if (hci_stack->ssp_auto_accept){ 3740 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3741 }; 3742 break; 3743 3744 case HCI_EVENT_MODE_CHANGE: 3745 handle = hci_event_mode_change_get_handle(packet); 3746 conn = hci_connection_for_handle(handle); 3747 if (!conn) break; 3748 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3749 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3750 break; 3751 #endif 3752 3753 case HCI_EVENT_ENCRYPTION_CHANGE: 3754 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3755 handle = hci_event_encryption_change_get_connection_handle(packet); 3756 conn = hci_connection_for_handle(handle); 3757 if (!conn) break; 3758 if (hci_event_encryption_change_get_status(packet) == 0u) { 3759 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3760 if (encryption_enabled){ 3761 if (hci_is_le_connection(conn)){ 3762 // For LE, we accept connection as encrypted 3763 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3764 } 3765 #ifdef ENABLE_CLASSIC 3766 else { 3767 3768 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3769 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3770 bool connected_uses_aes_ccm = encryption_enabled == 2; 3771 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3772 log_info("SC during pairing, but only E0 now -> abort"); 3773 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3774 break; 3775 } 3776 3777 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3778 if (connected_uses_aes_ccm){ 3779 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3780 } 3781 3782 #ifdef ENABLE_TESTING_SUPPORT 3783 // work around for issue with PTS dongle 3784 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3785 #endif 3786 // validate encryption key size 3787 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3788 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3789 // already got encryption key size 3790 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3791 } else { 3792 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3793 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3794 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3795 } else { 3796 // if not, pretend everything is perfect 3797 hci_handle_read_encryption_key_size_complete(conn, 16); 3798 } 3799 } 3800 } 3801 #endif 3802 } else { 3803 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3804 } 3805 } else { 3806 uint8_t status = hci_event_encryption_change_get_status(packet); 3807 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3808 conn->bonding_flags &= ~BONDING_DEDICATED; 3809 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3810 conn->bonding_status = status; 3811 } 3812 } 3813 3814 break; 3815 3816 #ifdef ENABLE_CLASSIC 3817 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3818 handle = hci_event_authentication_complete_get_connection_handle(packet); 3819 conn = hci_connection_for_handle(handle); 3820 if (!conn) break; 3821 3822 // clear authentication active flag 3823 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3824 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3825 3826 // authenticated only if auth status == 0 3827 if (hci_event_authentication_complete_get_status(packet) == 0){ 3828 // authenticated 3829 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3830 3831 // If not already encrypted, start encryption 3832 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3833 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3834 break; 3835 } 3836 } 3837 3838 // emit updated security level 3839 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3840 break; 3841 3842 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3843 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3844 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3845 if (!conn) break; 3846 3847 // treat successfully paired connection as authenticated 3848 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3849 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3850 } 3851 3852 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3853 break; 3854 #endif 3855 3856 // HCI_EVENT_DISCONNECTION_COMPLETE 3857 // has been split, to first notify stack before shutting connection down 3858 // see end of function, too. 3859 case HCI_EVENT_DISCONNECTION_COMPLETE: 3860 if (packet[2]) break; // status != 0 3861 handle = little_endian_read_16(packet, 3); 3862 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3863 if (hci_stack->acl_fragmentation_total_size > 0u) { 3864 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3865 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3866 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3867 hci_stack->acl_fragmentation_total_size = 0; 3868 hci_stack->acl_fragmentation_pos = 0; 3869 if (release_buffer){ 3870 hci_release_packet_buffer(); 3871 } 3872 } 3873 } 3874 3875 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3876 // drop outgoing ISO fragments if it is for closed connection and release buffer if tx not active 3877 if (hci_stack->iso_fragmentation_total_size > 0u) { 3878 if (handle == READ_ISO_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3879 int release_buffer = hci_stack->iso_fragmentation_tx_active == 0u; 3880 log_info("drop fragmented ISO data for closed connection, release buffer %u", release_buffer); 3881 hci_stack->iso_fragmentation_total_size = 0; 3882 hci_stack->iso_fragmentation_pos = 0; 3883 if (release_buffer){ 3884 hci_release_packet_buffer(); 3885 } 3886 } 3887 } 3888 3889 // finalize iso stream if handle matches 3890 iso_stream = hci_iso_stream_for_con_handle(handle); 3891 if (iso_stream != NULL){ 3892 hci_iso_stream_finalize(iso_stream); 3893 break; 3894 } 3895 #endif 3896 3897 conn = hci_connection_for_handle(handle); 3898 if (!conn) break; 3899 #ifdef ENABLE_CLASSIC 3900 // pairing failed if it was ongoing 3901 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3902 #endif 3903 3904 // emit dedicatd bonding event 3905 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3906 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3907 } 3908 3909 // mark connection for shutdown, stop timers, reset state 3910 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3911 hci_connection_stop_timer(conn); 3912 hci_connection_init(conn); 3913 3914 #ifdef ENABLE_BLE 3915 #ifdef ENABLE_LE_PERIPHERAL 3916 // re-enable advertisements for le connections if active 3917 if (hci_is_le_connection(conn)){ 3918 hci_update_advertisements_enabled_for_current_roles(); 3919 } 3920 #endif 3921 #endif 3922 break; 3923 3924 case HCI_EVENT_HARDWARE_ERROR: 3925 log_error("Hardware Error: 0x%02x", packet[2]); 3926 if (hci_stack->hardware_error_callback){ 3927 (*hci_stack->hardware_error_callback)(packet[2]); 3928 } else { 3929 // if no special requests, just reboot stack 3930 hci_power_control_off(); 3931 hci_power_control_on(); 3932 } 3933 break; 3934 3935 #ifdef ENABLE_CLASSIC 3936 case HCI_EVENT_ROLE_CHANGE: 3937 if (packet[2]) break; // status != 0 3938 reverse_bd_addr(&packet[3], addr); 3939 addr_type = BD_ADDR_TYPE_ACL; 3940 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3941 if (!conn) break; 3942 conn->role = packet[9]; 3943 break; 3944 #endif 3945 3946 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3947 // release packet buffer only for asynchronous transport and if there are not further fragments 3948 if (hci_transport_synchronous()) { 3949 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3950 return; // instead of break: to avoid re-entering hci_run() 3951 } 3952 hci_stack->acl_fragmentation_tx_active = 0; 3953 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3954 hci_stack->iso_fragmentation_tx_active = 0; 3955 if (hci_stack->iso_fragmentation_total_size) break; 3956 #endif 3957 if (hci_stack->acl_fragmentation_total_size) break; 3958 hci_release_packet_buffer(); 3959 3960 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3961 hci_iso_notify_can_send_now(); 3962 #endif 3963 // L2CAP receives this event via the hci_emit_event below 3964 3965 #ifdef ENABLE_CLASSIC 3966 // For SCO, we do the can_send_now_check here 3967 hci_notify_if_sco_can_send_now(); 3968 #endif 3969 break; 3970 3971 #ifdef ENABLE_CLASSIC 3972 case HCI_EVENT_SCO_CAN_SEND_NOW: 3973 // For SCO, we do the can_send_now_check here 3974 hci_stack->sco_can_send_now = true; 3975 hci_notify_if_sco_can_send_now(); 3976 return; 3977 3978 // explode inquriy results for easier consumption 3979 case HCI_EVENT_INQUIRY_RESULT: 3980 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3981 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3982 gap_inquiry_explode(packet, size); 3983 break; 3984 #endif 3985 3986 #ifdef ENABLE_BLE 3987 case HCI_EVENT_LE_META: 3988 switch (packet[2]){ 3989 #ifdef ENABLE_LE_CENTRAL 3990 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3991 if (!hci_stack->le_scanning_enabled) break; 3992 le_handle_advertisement_report(packet, size); 3993 break; 3994 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3995 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3996 if (!hci_stack->le_scanning_enabled) break; 3997 le_handle_extended_advertisement_report(packet, size); 3998 break; 3999 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 4000 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 4001 hci_stack->le_periodic_sync_state = LE_CONNECTING_IDLE; 4002 break; 4003 #endif 4004 #endif 4005 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 4006 event_handle_le_connection_complete(packet); 4007 break; 4008 4009 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 4010 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 4011 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 4012 conn = hci_connection_for_handle(handle); 4013 if (!conn) break; 4014 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 4015 break; 4016 4017 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 4018 // connection 4019 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 4020 conn = hci_connection_for_handle(handle); 4021 if (conn) { 4022 // read arguments 4023 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 4024 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 4025 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 4026 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 4027 4028 // validate against current connection parameter range 4029 le_connection_parameter_range_t existing_range; 4030 gap_get_connection_parameter_range(&existing_range); 4031 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 4032 if (update_parameter){ 4033 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 4034 conn->le_conn_interval_min = le_conn_interval_min; 4035 conn->le_conn_interval_max = le_conn_interval_max; 4036 conn->le_conn_latency = le_conn_latency; 4037 conn->le_supervision_timeout = le_supervision_timeout; 4038 } else { 4039 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 4040 } 4041 } 4042 break; 4043 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 4044 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 4045 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 4046 conn = hci_connection_for_handle(handle); 4047 if (conn) { 4048 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 4049 } 4050 break; 4051 #endif 4052 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4053 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 4054 if (hci_stack->iso_active_operation_type == HCI_ISO_TYPE_CIS){ 4055 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 4056 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 4057 iso_stream = hci_iso_stream_for_con_handle(handle); 4058 btstack_assert(iso_stream != NULL); 4059 // track SDU 4060 iso_stream->max_sdu_c_to_p = hci_subevent_le_cis_established_get_max_pdu_c_to_p(packet); 4061 iso_stream->max_sdu_p_to_c = hci_subevent_le_cis_established_get_max_pdu_p_to_c(packet); 4062 if (hci_stack->iso_active_operation_group_id == HCI_ISO_GROUP_ID_SINGLE_CIS){ 4063 // CIS Accept by Peripheral 4064 if (status == ERROR_CODE_SUCCESS){ 4065 if (iso_stream->max_sdu_p_to_c > 0){ 4066 // we're peripheral and we will send data 4067 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT; 4068 } else { 4069 // we're peripheral and we will only receive data 4070 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_OUTPUT; 4071 } 4072 } else { 4073 hci_iso_stream_finalize(iso_stream); 4074 hci_emit_cis_created(HCI_ISO_GROUP_ID_INVALID, handle, status); 4075 } 4076 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4077 } else { 4078 // CIG Setup by Central 4079 le_audio_cig_t * cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 4080 btstack_assert(cig != NULL); 4081 // update iso stream state 4082 if (status == ERROR_CODE_SUCCESS){ 4083 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 4084 } else { 4085 iso_stream->state = HCI_ISO_STREAM_STATE_IDLE; 4086 } 4087 // update cig state 4088 uint8_t i; 4089 for (i=0;i<cig->num_cis;i++){ 4090 if (cig->cis_con_handles[i] == handle){ 4091 cig->cis_setup_active[i] = false; 4092 if (status == ERROR_CODE_SUCCESS){ 4093 cig->cis_setup_active[i] = false; 4094 cig->cis_established[i] = true; 4095 } else { 4096 hci_emit_cis_created(cig->cig_id, handle, status); 4097 } 4098 } 4099 } 4100 4101 // trigger iso path setup if complete 4102 bool setup_active = false; 4103 for (i=0;i<cig->num_cis;i++){ 4104 setup_active |= cig->cis_setup_active[i]; 4105 } 4106 if (setup_active == false){ 4107 cig->state_vars.next_cis = 0; 4108 cig->state = LE_AUDIO_CIG_STATE_SETUP_ISO_PATH; 4109 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4110 } 4111 } 4112 } 4113 break; 4114 case HCI_SUBEVENT_LE_CREATE_BIG_COMPLETE: 4115 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4116 big = hci_big_for_handle(packet[4]); 4117 if (big != NULL){ 4118 uint8_t status = packet[3]; 4119 if (status == ERROR_CODE_SUCCESS){ 4120 // store bis_con_handles and trigger iso path setup 4121 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[20]); 4122 uint8_t i; 4123 for (i=0;i<num_bis;i++){ 4124 hci_con_handle_t bis_handle = (hci_con_handle_t) little_endian_read_16(packet, 21 + (2 * i)); 4125 big->bis_con_handles[i] = bis_handle; 4126 // assign bis handle 4127 btstack_linked_list_iterator_t it; 4128 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 4129 while (btstack_linked_list_iterator_has_next(&it)){ 4130 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 4131 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 4132 (iso_stream->group_id == big->big_handle)){ 4133 iso_stream->con_handle = bis_handle; 4134 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 4135 break; 4136 } 4137 } 4138 } 4139 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4140 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4141 big->state_vars.next_bis = 0; 4142 } 4143 } else { 4144 // create BIG failed or has been stopped by us 4145 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big->big_handle); 4146 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4147 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED){ 4148 hci_emit_big_created(big, status); 4149 } else { 4150 hci_emit_big_terminated(big); 4151 } 4152 } 4153 } 4154 break; 4155 case HCI_SUBEVENT_LE_TERMINATE_BIG_COMPLETE: 4156 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4157 big = hci_big_for_handle(hci_subevent_le_terminate_big_complete_get_big_handle(packet)); 4158 if (big != NULL){ 4159 // finalize associated ISO streams 4160 btstack_linked_list_iterator_t it; 4161 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 4162 while (btstack_linked_list_iterator_has_next(&it)){ 4163 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 4164 if (iso_stream->group_id == big->big_handle){ 4165 log_info("BIG Terminated, big_handle 0x%02x, con handle 0x%04x", iso_stream->group_id, iso_stream->con_handle); 4166 btstack_linked_list_iterator_remove(&it); 4167 btstack_memory_hci_iso_stream_free(iso_stream); 4168 } 4169 } 4170 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4171 switch (big->state){ 4172 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 4173 hci_emit_big_created(big, big->state_vars.status); 4174 break; 4175 default: 4176 hci_emit_big_terminated(big); 4177 break; 4178 } 4179 } 4180 break; 4181 case HCI_SUBEVENT_LE_BIG_SYNC_ESTABLISHED: 4182 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4183 big_sync = hci_big_sync_for_handle(packet[4]); 4184 if (big_sync != NULL){ 4185 uint8_t status = packet[3]; 4186 uint8_t big_handle = packet[4]; 4187 if (status == ERROR_CODE_SUCCESS){ 4188 // store bis_con_handles and trigger iso path setup 4189 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[16]); 4190 uint8_t i; 4191 for (i=0;i<num_bis;i++){ 4192 big_sync->bis_con_handles[i] = little_endian_read_16(packet, 17 + (2 * i)); 4193 } 4194 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4195 // trigger iso path setup 4196 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4197 big_sync->state_vars.next_bis = 0; 4198 } 4199 } else { 4200 // create BIG Sync failed or has been stopped by us 4201 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4202 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4203 hci_emit_big_sync_created(big_sync, status); 4204 } else { 4205 hci_emit_big_sync_stopped(big_handle); 4206 } 4207 } 4208 } 4209 break; 4210 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 4211 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4212 big_sync = hci_big_sync_for_handle(packet[4]); 4213 if (big_sync != NULL){ 4214 uint8_t big_handle = packet[4]; 4215 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4216 hci_emit_big_sync_stopped(big_handle); 4217 } 4218 break; 4219 #endif 4220 default: 4221 break; 4222 } 4223 break; 4224 #endif 4225 case HCI_EVENT_VENDOR_SPECIFIC: 4226 // Vendor specific commands often create vendor specific event instead of num completed packets 4227 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 4228 switch (hci_stack->manufacturer){ 4229 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 4230 hci_stack->num_cmd_packets = 1; 4231 break; 4232 default: 4233 break; 4234 } 4235 break; 4236 default: 4237 break; 4238 } 4239 4240 handle_event_for_current_stack_state(packet, size); 4241 4242 // notify upper stack 4243 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 4244 4245 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 4246 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 4247 handle = little_endian_read_16(packet, 3); 4248 hci_connection_t * aConn = hci_connection_for_handle(handle); 4249 // discard connection if app did not trigger a reconnect in the event handler 4250 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4251 hci_shutdown_connection(aConn); 4252 } 4253 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 4254 hci_controller_dump_packets(); 4255 #endif 4256 } 4257 4258 // execute main loop 4259 hci_run(); 4260 } 4261 4262 #ifdef ENABLE_CLASSIC 4263 4264 #ifdef ENABLE_SCO_OVER_HCI 4265 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 4266 static void sco_schedule_tx(hci_connection_t * conn); 4267 4268 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 4269 log_debug("SCO TX Timeout"); 4270 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 4271 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4272 if (!conn) return; 4273 4274 // trigger send 4275 conn->sco_tx_ready = 1; 4276 // extra packet if CVSD but SCO buffer is too short 4277 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 4278 conn->sco_tx_ready++; 4279 } 4280 hci_notify_if_sco_can_send_now(); 4281 } 4282 4283 4284 #define SCO_TX_AFTER_RX_MS (6) 4285 4286 static void sco_schedule_tx(hci_connection_t * conn){ 4287 4288 uint32_t now = btstack_run_loop_get_time_ms(); 4289 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 4290 int time_delta_ms = sco_tx_ms - now; 4291 4292 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 4293 4294 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 4295 btstack_run_loop_remove_timer(timer); 4296 btstack_run_loop_set_timer(timer, time_delta_ms); 4297 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 4298 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 4299 btstack_run_loop_add_timer(timer); 4300 } 4301 #endif 4302 4303 static void sco_handler(uint8_t * packet, uint16_t size){ 4304 // lookup connection struct 4305 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 4306 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4307 if (!conn) return; 4308 4309 #ifdef ENABLE_SCO_OVER_HCI 4310 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 4311 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 4312 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 4313 packet[2] = 0x3c; 4314 memmove(&packet[3], &packet[23], 63); 4315 size = 63; 4316 } 4317 } 4318 4319 if (hci_have_usb_transport()){ 4320 // Nothing to do 4321 } else { 4322 // 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); 4323 if (hci_stack->synchronous_flow_control_enabled == 0){ 4324 uint32_t now = btstack_run_loop_get_time_ms(); 4325 4326 if (!conn->sco_rx_valid){ 4327 // ignore first 10 packets 4328 conn->sco_rx_count++; 4329 // log_debug("sco rx count %u", conn->sco_rx_count); 4330 if (conn->sco_rx_count == 10) { 4331 // use first timestamp as is and pretent it just started 4332 conn->sco_rx_ms = now; 4333 conn->sco_rx_valid = 1; 4334 conn->sco_rx_count = 0; 4335 sco_schedule_tx(conn); 4336 } 4337 } else { 4338 // track expected arrival timme 4339 conn->sco_rx_count++; 4340 conn->sco_rx_ms += 7; 4341 int delta = (int32_t) (now - conn->sco_rx_ms); 4342 if (delta > 0){ 4343 conn->sco_rx_ms++; 4344 } 4345 // log_debug("sco rx %u", conn->sco_rx_ms); 4346 sco_schedule_tx(conn); 4347 } 4348 } 4349 } 4350 #endif 4351 4352 // deliver to app 4353 if (hci_stack->sco_packet_handler) { 4354 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 4355 } 4356 4357 #ifdef HAVE_SCO_TRANSPORT 4358 // We can send one packet for each received packet 4359 conn->sco_tx_ready++; 4360 hci_notify_if_sco_can_send_now(); 4361 #endif 4362 4363 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4364 conn->num_packets_completed++; 4365 hci_stack->host_completed_packets = 1; 4366 hci_run(); 4367 #endif 4368 } 4369 #endif 4370 4371 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 4372 hci_dump_packet(packet_type, 1, packet, size); 4373 switch (packet_type) { 4374 case HCI_EVENT_PACKET: 4375 event_handler(packet, size); 4376 break; 4377 case HCI_ACL_DATA_PACKET: 4378 acl_handler(packet, size); 4379 break; 4380 #ifdef ENABLE_CLASSIC 4381 case HCI_SCO_DATA_PACKET: 4382 sco_handler(packet, size); 4383 break; 4384 #endif 4385 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4386 case HCI_ISO_DATA_PACKET: 4387 hci_iso_packet_handler(packet, size); 4388 break; 4389 #endif 4390 default: 4391 break; 4392 } 4393 } 4394 4395 /** 4396 * @brief Add event packet handler. 4397 */ 4398 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4399 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4400 } 4401 4402 /** 4403 * @brief Remove event packet handler. 4404 */ 4405 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4406 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4407 } 4408 4409 /** Register HCI packet handlers */ 4410 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 4411 hci_stack->acl_packet_handler = handler; 4412 } 4413 4414 #ifdef ENABLE_CLASSIC 4415 /** 4416 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 4417 */ 4418 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 4419 hci_stack->sco_packet_handler = handler; 4420 } 4421 #endif 4422 4423 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4424 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 4425 hci_stack->iso_packet_handler = handler; 4426 } 4427 #endif 4428 4429 static void hci_state_reset(void){ 4430 // no connections yet 4431 hci_stack->connections = NULL; 4432 4433 // keep discoverable/connectable as this has been requested by the client(s) 4434 // hci_stack->discoverable = 0; 4435 // hci_stack->connectable = 0; 4436 // hci_stack->bondable = 1; 4437 // hci_stack->own_addr_type = 0; 4438 4439 // buffer is free 4440 hci_stack->hci_packet_buffer_reserved = false; 4441 4442 // no pending cmds 4443 hci_stack->decline_reason = 0; 4444 4445 hci_stack->secure_connections_active = false; 4446 4447 #ifdef ENABLE_CLASSIC 4448 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 4449 hci_stack->page_timeout = 0x6000; // ca. 15 sec 4450 4451 hci_stack->gap_tasks_classic = 4452 GAP_TASK_SET_DEFAULT_LINK_POLICY | 4453 GAP_TASK_SET_CLASS_OF_DEVICE | 4454 GAP_TASK_SET_LOCAL_NAME | 4455 GAP_TASK_SET_EIR_DATA | 4456 GAP_TASK_WRITE_SCAN_ENABLE | 4457 GAP_TASK_WRITE_PAGE_TIMEOUT; 4458 #endif 4459 4460 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4461 hci_stack->classic_read_local_oob_data = false; 4462 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 4463 #endif 4464 4465 // LE 4466 #ifdef ENABLE_BLE 4467 memset(hci_stack->le_random_address, 0, 6); 4468 hci_stack->le_random_address_set = 0; 4469 #endif 4470 #ifdef ENABLE_LE_CENTRAL 4471 hci_stack->le_scanning_active = false; 4472 hci_stack->le_scanning_param_update = true; 4473 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4474 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 4475 hci_stack->le_whitelist_capacity = 0; 4476 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4477 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 4478 #endif 4479 #endif 4480 #ifdef ENABLE_LE_PERIPHERAL 4481 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4482 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 4483 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4484 } 4485 if (hci_stack->le_advertisements_data != NULL){ 4486 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4487 } 4488 #endif 4489 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4490 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION; 4491 #endif 4492 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4493 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4494 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_INVALID; 4495 #endif 4496 } 4497 4498 #ifdef ENABLE_CLASSIC 4499 /** 4500 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4501 */ 4502 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4503 // store and open remote device db 4504 hci_stack->link_key_db = link_key_db; 4505 if (hci_stack->link_key_db) { 4506 hci_stack->link_key_db->open(); 4507 } 4508 } 4509 #endif 4510 4511 void hci_init(const hci_transport_t *transport, const void *config){ 4512 4513 #ifdef HAVE_MALLOC 4514 if (!hci_stack) { 4515 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4516 } 4517 #else 4518 hci_stack = &hci_stack_static; 4519 #endif 4520 memset(hci_stack, 0, sizeof(hci_stack_t)); 4521 4522 // reference to use transport layer implementation 4523 hci_stack->hci_transport = transport; 4524 4525 // reference to used config 4526 hci_stack->config = config; 4527 4528 // setup pointer for outgoing packet buffer 4529 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4530 4531 // max acl payload size defined in config.h 4532 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4533 4534 // register packet handlers with transport 4535 transport->register_packet_handler(&packet_handler); 4536 4537 hci_stack->state = HCI_STATE_OFF; 4538 4539 // class of device 4540 hci_stack->class_of_device = 0x007a020c; // Smartphone 4541 4542 // bondable by default 4543 hci_stack->bondable = 1; 4544 4545 #ifdef ENABLE_CLASSIC 4546 // classic name 4547 hci_stack->local_name = default_classic_name; 4548 4549 // Master slave policy 4550 hci_stack->master_slave_policy = 1; 4551 4552 // Allow Role Switch 4553 hci_stack->allow_role_switch = 1; 4554 4555 // Default / minimum security level = 2 4556 hci_stack->gap_security_level = LEVEL_2; 4557 4558 // Default Security Mode 4 4559 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4560 4561 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4562 hci_stack->gap_required_encyrption_key_size = 7; 4563 4564 // Link Supervision Timeout 4565 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4566 4567 #endif 4568 4569 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4570 hci_stack->ssp_enable = 1; 4571 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4572 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4573 hci_stack->ssp_auto_accept = 1; 4574 4575 // Secure Connections: enable (requires support from Controller) 4576 hci_stack->secure_connections_enable = true; 4577 4578 // voice setting - signed 16 bit pcm data with CVSD over the air 4579 hci_stack->sco_voice_setting = 0x60; 4580 4581 #ifdef ENABLE_LE_CENTRAL 4582 // connection parameter to use for outgoing connections 4583 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4584 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4585 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4586 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4587 hci_stack->le_connection_latency = 4; // 4 4588 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4589 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4590 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4591 4592 // default LE Scanning 4593 hci_stack->le_scan_type = 0x1; // active 4594 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4595 hci_stack->le_scan_window = 0x30; // 30 ms 4596 #endif 4597 4598 #ifdef ENABLE_LE_PERIPHERAL 4599 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4600 #endif 4601 4602 // connection parameter range used to answer connection parameter update requests in l2cap 4603 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4604 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4605 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4606 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4607 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4608 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4609 4610 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4611 hci_stack->iso_packets_to_queue = 1; 4612 #endif 4613 4614 hci_state_reset(); 4615 } 4616 4617 void hci_deinit(void){ 4618 btstack_run_loop_remove_timer(&hci_stack->timeout); 4619 #ifdef HAVE_MALLOC 4620 if (hci_stack) { 4621 free(hci_stack); 4622 } 4623 #endif 4624 hci_stack = NULL; 4625 4626 #ifdef ENABLE_CLASSIC 4627 disable_l2cap_timeouts = 0; 4628 #endif 4629 } 4630 4631 /** 4632 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4633 */ 4634 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4635 hci_stack->chipset = chipset_driver; 4636 4637 // reset chipset driver - init is also called on power_up 4638 if (hci_stack->chipset && hci_stack->chipset->init){ 4639 hci_stack->chipset->init(hci_stack->config); 4640 } 4641 } 4642 4643 /** 4644 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4645 */ 4646 void hci_set_control(const btstack_control_t *hardware_control){ 4647 // references to used control implementation 4648 hci_stack->control = hardware_control; 4649 // init with transport config 4650 hardware_control->init(hci_stack->config); 4651 } 4652 4653 static void hci_discard_connections(void){ 4654 btstack_linked_list_iterator_t it; 4655 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4656 while (btstack_linked_list_iterator_has_next(&it)){ 4657 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4658 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4659 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4660 hci_shutdown_connection(connection); 4661 } 4662 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4663 while (hci_stack->iso_streams != NULL){ 4664 hci_iso_stream_finalize((hci_iso_stream_t *) hci_stack->iso_streams); 4665 } 4666 #endif 4667 } 4668 4669 void hci_close(void){ 4670 4671 #ifdef ENABLE_CLASSIC 4672 // close remote device db 4673 if (hci_stack->link_key_db) { 4674 hci_stack->link_key_db->close(); 4675 } 4676 #endif 4677 4678 hci_discard_connections(); 4679 4680 hci_power_control(HCI_POWER_OFF); 4681 4682 #ifdef HAVE_MALLOC 4683 free(hci_stack); 4684 #endif 4685 hci_stack = NULL; 4686 } 4687 4688 #ifdef HAVE_SCO_TRANSPORT 4689 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4690 hci_stack->sco_transport = sco_transport; 4691 sco_transport->register_packet_handler(&packet_handler); 4692 } 4693 #endif 4694 4695 #ifdef ENABLE_CLASSIC 4696 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4697 // validate ranage and set 4698 if (encryption_key_size < 7) return; 4699 if (encryption_key_size > 16) return; 4700 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4701 } 4702 4703 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4704 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4705 hci_stack->gap_security_mode = security_mode; 4706 return ERROR_CODE_SUCCESS; 4707 } else { 4708 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4709 } 4710 } 4711 4712 gap_security_mode_t gap_get_security_mode(void){ 4713 return hci_stack->gap_security_mode; 4714 } 4715 4716 void gap_set_security_level(gap_security_level_t security_level){ 4717 hci_stack->gap_security_level = security_level; 4718 } 4719 4720 gap_security_level_t gap_get_security_level(void){ 4721 if (hci_stack->gap_secure_connections_only_mode){ 4722 return LEVEL_4; 4723 } 4724 return hci_stack->gap_security_level; 4725 } 4726 4727 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4728 hci_stack->gap_minimal_service_security_level = security_level; 4729 } 4730 4731 void gap_set_secure_connections_only_mode(bool enable){ 4732 hci_stack->gap_secure_connections_only_mode = enable; 4733 } 4734 4735 bool gap_get_secure_connections_only_mode(void){ 4736 return hci_stack->gap_secure_connections_only_mode; 4737 } 4738 #endif 4739 4740 #ifdef ENABLE_CLASSIC 4741 void gap_set_class_of_device(uint32_t class_of_device){ 4742 hci_stack->class_of_device = class_of_device; 4743 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4744 hci_run(); 4745 } 4746 4747 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4748 hci_stack->default_link_policy_settings = default_link_policy_settings; 4749 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4750 hci_run(); 4751 } 4752 4753 void gap_set_allow_role_switch(bool allow_role_switch){ 4754 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4755 } 4756 4757 uint8_t hci_get_allow_role_switch(void){ 4758 return hci_stack->allow_role_switch; 4759 } 4760 4761 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4762 hci_stack->link_supervision_timeout = link_supervision_timeout; 4763 } 4764 4765 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4766 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4767 } 4768 4769 uint16_t hci_automatic_flush_timeout(void){ 4770 return hci_stack->automatic_flush_timeout; 4771 } 4772 4773 void hci_disable_l2cap_timeout_check(void){ 4774 disable_l2cap_timeouts = 1; 4775 } 4776 #endif 4777 4778 #ifndef HAVE_HOST_CONTROLLER_API 4779 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4780 void hci_set_bd_addr(bd_addr_t addr){ 4781 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4782 hci_stack->custom_bd_addr_set = 1; 4783 } 4784 #endif 4785 4786 // State-Module-Driver overview 4787 // state module low-level 4788 // HCI_STATE_OFF off close 4789 // HCI_STATE_INITIALIZING, on open 4790 // HCI_STATE_WORKING, on open 4791 // HCI_STATE_HALTING, on open 4792 // HCI_STATE_SLEEPING, off/sleep close 4793 // HCI_STATE_FALLING_ASLEEP on open 4794 4795 static int hci_power_control_on(void){ 4796 4797 // power on 4798 int err = 0; 4799 if (hci_stack->control && hci_stack->control->on){ 4800 err = (*hci_stack->control->on)(); 4801 } 4802 if (err){ 4803 log_error( "POWER_ON failed"); 4804 hci_emit_hci_open_failed(); 4805 return err; 4806 } 4807 4808 // int chipset driver 4809 if (hci_stack->chipset && hci_stack->chipset->init){ 4810 hci_stack->chipset->init(hci_stack->config); 4811 } 4812 4813 // init transport 4814 if (hci_stack->hci_transport->init){ 4815 hci_stack->hci_transport->init(hci_stack->config); 4816 } 4817 4818 // open transport 4819 err = hci_stack->hci_transport->open(); 4820 if (err){ 4821 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4822 if (hci_stack->control && hci_stack->control->off){ 4823 (*hci_stack->control->off)(); 4824 } 4825 hci_emit_hci_open_failed(); 4826 return err; 4827 } 4828 return 0; 4829 } 4830 4831 static void hci_power_control_off(void){ 4832 4833 log_info("hci_power_control_off"); 4834 4835 // close low-level device 4836 hci_stack->hci_transport->close(); 4837 4838 log_info("hci_power_control_off - hci_transport closed"); 4839 4840 // power off 4841 if (hci_stack->control && hci_stack->control->off){ 4842 (*hci_stack->control->off)(); 4843 } 4844 4845 log_info("hci_power_control_off - control closed"); 4846 4847 hci_stack->state = HCI_STATE_OFF; 4848 } 4849 4850 static void hci_power_control_sleep(void){ 4851 4852 log_info("hci_power_control_sleep"); 4853 4854 #if 0 4855 // don't close serial port during sleep 4856 4857 // close low-level device 4858 hci_stack->hci_transport->close(hci_stack->config); 4859 #endif 4860 4861 // sleep mode 4862 if (hci_stack->control && hci_stack->control->sleep){ 4863 (*hci_stack->control->sleep)(); 4864 } 4865 4866 hci_stack->state = HCI_STATE_SLEEPING; 4867 } 4868 4869 static int hci_power_control_wake(void){ 4870 4871 log_info("hci_power_control_wake"); 4872 4873 // wake on 4874 if (hci_stack->control && hci_stack->control->wake){ 4875 (*hci_stack->control->wake)(); 4876 } 4877 4878 #if 0 4879 // open low-level device 4880 int err = hci_stack->hci_transport->open(hci_stack->config); 4881 if (err){ 4882 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4883 if (hci_stack->control && hci_stack->control->off){ 4884 (*hci_stack->control->off)(); 4885 } 4886 hci_emit_hci_open_failed(); 4887 return err; 4888 } 4889 #endif 4890 4891 return 0; 4892 } 4893 4894 static void hci_power_enter_initializing_state(void){ 4895 // set up state machine 4896 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4897 hci_stack->hci_packet_buffer_reserved = false; 4898 hci_stack->state = HCI_STATE_INITIALIZING; 4899 hci_stack->substate = HCI_INIT_SEND_RESET; 4900 } 4901 4902 static void hci_power_enter_halting_state(void){ 4903 #ifdef ENABLE_BLE 4904 // drop entries scheduled for removal, mark others for re-adding 4905 btstack_linked_list_iterator_t it; 4906 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4907 while (btstack_linked_list_iterator_has_next(&it)){ 4908 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4909 if ((entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)) == LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4910 btstack_linked_list_iterator_remove(&it); 4911 btstack_memory_whitelist_entry_free(entry); 4912 } else { 4913 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4914 } 4915 } 4916 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4917 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 4918 const uint8_t mask = LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 4919 while (btstack_linked_list_iterator_has_next(&it)){ 4920 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 4921 if ((entry->state & mask) == LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER) { 4922 btstack_linked_list_iterator_remove(&it); 4923 btstack_memory_periodic_advertiser_list_entry_free(entry); 4924 } else { 4925 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 4926 continue; 4927 } 4928 } 4929 #endif 4930 #endif 4931 // see hci_run 4932 hci_stack->state = HCI_STATE_HALTING; 4933 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4934 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4935 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4936 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4937 btstack_run_loop_add_timer(&hci_stack->timeout); 4938 } 4939 4940 // returns error 4941 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4942 int err; 4943 switch (power_mode){ 4944 case HCI_POWER_ON: 4945 err = hci_power_control_on(); 4946 if (err != 0) { 4947 log_error("hci_power_control_on() error %d", err); 4948 return err; 4949 } 4950 hci_power_enter_initializing_state(); 4951 break; 4952 case HCI_POWER_OFF: 4953 // do nothing 4954 break; 4955 case HCI_POWER_SLEEP: 4956 // do nothing (with SLEEP == OFF) 4957 break; 4958 default: 4959 btstack_assert(false); 4960 break; 4961 } 4962 return ERROR_CODE_SUCCESS; 4963 } 4964 4965 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4966 switch (power_mode){ 4967 case HCI_POWER_ON: 4968 // do nothing 4969 break; 4970 case HCI_POWER_OFF: 4971 // no connections yet, just turn it off 4972 hci_power_control_off(); 4973 break; 4974 case HCI_POWER_SLEEP: 4975 // no connections yet, just turn it off 4976 hci_power_control_sleep(); 4977 break; 4978 default: 4979 btstack_assert(false); 4980 break; 4981 } 4982 return ERROR_CODE_SUCCESS; 4983 } 4984 4985 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4986 switch (power_mode){ 4987 case HCI_POWER_ON: 4988 // do nothing 4989 break; 4990 case HCI_POWER_OFF: 4991 hci_power_enter_halting_state(); 4992 break; 4993 case HCI_POWER_SLEEP: 4994 // see hci_run 4995 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4996 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4997 break; 4998 default: 4999 btstack_assert(false); 5000 break; 5001 } 5002 return ERROR_CODE_SUCCESS; 5003 } 5004 5005 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 5006 switch (power_mode){ 5007 case HCI_POWER_ON: 5008 hci_power_enter_initializing_state(); 5009 break; 5010 case HCI_POWER_OFF: 5011 // do nothing 5012 break; 5013 case HCI_POWER_SLEEP: 5014 // see hci_run 5015 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 5016 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 5017 break; 5018 default: 5019 btstack_assert(false); 5020 break; 5021 } 5022 return ERROR_CODE_SUCCESS; 5023 } 5024 5025 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 5026 switch (power_mode){ 5027 case HCI_POWER_ON: 5028 hci_power_enter_initializing_state(); 5029 break; 5030 case HCI_POWER_OFF: 5031 hci_power_enter_halting_state(); 5032 break; 5033 case HCI_POWER_SLEEP: 5034 // do nothing 5035 break; 5036 default: 5037 btstack_assert(false); 5038 break; 5039 } 5040 return ERROR_CODE_SUCCESS; 5041 } 5042 5043 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 5044 int err; 5045 switch (power_mode){ 5046 case HCI_POWER_ON: 5047 err = hci_power_control_wake(); 5048 if (err) return err; 5049 hci_power_enter_initializing_state(); 5050 break; 5051 case HCI_POWER_OFF: 5052 hci_power_enter_halting_state(); 5053 break; 5054 case HCI_POWER_SLEEP: 5055 // do nothing 5056 break; 5057 default: 5058 btstack_assert(false); 5059 break; 5060 } 5061 return ERROR_CODE_SUCCESS; 5062 } 5063 5064 int hci_power_control(HCI_POWER_MODE power_mode){ 5065 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 5066 btstack_run_loop_remove_timer(&hci_stack->timeout); 5067 int err = 0; 5068 switch (hci_stack->state){ 5069 case HCI_STATE_OFF: 5070 err = hci_power_control_state_off(power_mode); 5071 break; 5072 case HCI_STATE_INITIALIZING: 5073 err = hci_power_control_state_initializing(power_mode); 5074 break; 5075 case HCI_STATE_WORKING: 5076 err = hci_power_control_state_working(power_mode); 5077 break; 5078 case HCI_STATE_HALTING: 5079 err = hci_power_control_state_halting(power_mode); 5080 break; 5081 case HCI_STATE_FALLING_ASLEEP: 5082 err = hci_power_control_state_falling_asleep(power_mode); 5083 break; 5084 case HCI_STATE_SLEEPING: 5085 err = hci_power_control_state_sleeping(power_mode); 5086 break; 5087 default: 5088 btstack_assert(false); 5089 break; 5090 } 5091 if (err != 0){ 5092 return err; 5093 } 5094 5095 // create internal event 5096 hci_emit_state(); 5097 5098 // trigger next/first action 5099 hci_run(); 5100 5101 return 0; 5102 } 5103 5104 5105 static void hci_halting_run(void) { 5106 5107 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5108 5109 hci_connection_t *connection; 5110 #ifdef ENABLE_BLE 5111 #ifdef ENABLE_LE_PERIPHERAL 5112 bool stop_advertismenets; 5113 #endif 5114 #endif 5115 5116 switch (hci_stack->substate) { 5117 case HCI_HALTING_CLASSIC_STOP: 5118 #ifdef ENABLE_CLASSIC 5119 if (!hci_can_send_command_packet_now()) return; 5120 5121 if (hci_stack->connectable || hci_stack->discoverable){ 5122 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 5123 hci_send_cmd(&hci_write_scan_enable, 0); 5124 return; 5125 } 5126 #endif 5127 /* fall through */ 5128 5129 case HCI_HALTING_LE_ADV_STOP: 5130 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 5131 5132 #ifdef ENABLE_BLE 5133 #ifdef ENABLE_LE_PERIPHERAL 5134 if (!hci_can_send_command_packet_now()) return; 5135 5136 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 5137 5138 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5139 if (hci_extended_advertising_supported()){ 5140 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5141 btstack_linked_list_iterator_t it; 5142 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5143 // stop all periodic advertisements and check if an extended set is active 5144 while (btstack_linked_list_iterator_has_next(&it)){ 5145 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5146 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5147 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5148 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 5149 return; 5150 } 5151 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5152 stop_advertismenets = true; 5153 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5154 } 5155 } 5156 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5157 if (stop_advertismenets){ 5158 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5159 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 5160 return; 5161 } 5162 } 5163 else 5164 #else /* ENABLE_LE_PERIPHERAL */ 5165 { 5166 if (stop_advertismenets) { 5167 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5168 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5169 return; 5170 } 5171 } 5172 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 5173 #endif /* ENABLE_LE_PERIPHERAL */ 5174 #endif /* ENABLE_BLE */ 5175 5176 /* fall through */ 5177 5178 case HCI_HALTING_LE_SCAN_STOP: 5179 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 5180 if (!hci_can_send_command_packet_now()) return; 5181 5182 #ifdef ENABLE_BLE 5183 #ifdef ENABLE_LE_CENTRAL 5184 if (hci_stack->le_scanning_active){ 5185 hci_le_scan_stop(); 5186 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 5187 return; 5188 } 5189 #endif 5190 #endif 5191 5192 /* fall through */ 5193 5194 case HCI_HALTING_DISCONNECT_ALL: 5195 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 5196 if (!hci_can_send_command_packet_now()) return; 5197 5198 // close all open connections 5199 connection = (hci_connection_t *) hci_stack->connections; 5200 if (connection) { 5201 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5202 5203 log_info("HCI_STATE_HALTING, connection %p, handle %u, state %u", connection, con_handle, connection->state); 5204 5205 // check state 5206 switch(connection->state) { 5207 case SENT_DISCONNECT: 5208 case RECEIVED_DISCONNECTION_COMPLETE: 5209 // wait until connection is gone 5210 return; 5211 default: 5212 break; 5213 } 5214 5215 // finally, send the disconnect command 5216 connection->state = SENT_DISCONNECT; 5217 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5218 return; 5219 } 5220 5221 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5222 // stop BIGs and BIG Syncs 5223 if (hci_stack->le_audio_bigs != NULL){ 5224 le_audio_big_t * big = (le_audio_big_t*) hci_stack->le_audio_bigs; 5225 if (big->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5226 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5227 hci_send_cmd(&hci_le_terminate_big, big->big_handle); 5228 return; 5229 } 5230 if (hci_stack->le_audio_big_syncs != NULL){ 5231 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t*) hci_stack->le_audio_big_syncs; 5232 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5233 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5234 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 5235 return; 5236 } 5237 #endif 5238 5239 btstack_run_loop_remove_timer(&hci_stack->timeout); 5240 5241 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5242 log_info("HCI_STATE_HALTING: wait 50 ms"); 5243 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 5244 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5245 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5246 btstack_run_loop_add_timer(&hci_stack->timeout); 5247 break; 5248 5249 case HCI_HALTING_W4_CLOSE_TIMER: 5250 // keep waiting 5251 break; 5252 5253 case HCI_HALTING_CLOSE: 5254 // close left over connections (that had not been properly closed before) 5255 hci_stack->substate = HCI_HALTING_CLOSE_DISCARDING_CONNECTIONS; 5256 hci_discard_connections(); 5257 5258 log_info("HCI_STATE_HALTING, calling off"); 5259 5260 // switch mode 5261 hci_power_control_off(); 5262 5263 log_info("HCI_STATE_HALTING, emitting state"); 5264 hci_emit_state(); 5265 log_info("HCI_STATE_HALTING, done"); 5266 break; 5267 5268 default: 5269 break; 5270 } 5271 }; 5272 5273 static void hci_falling_asleep_run(void){ 5274 hci_connection_t * connection; 5275 switch(hci_stack->substate) { 5276 case HCI_FALLING_ASLEEP_DISCONNECT: 5277 log_info("HCI_STATE_FALLING_ASLEEP"); 5278 // close all open connections 5279 connection = (hci_connection_t *) hci_stack->connections; 5280 if (connection){ 5281 5282 // send disconnect 5283 if (!hci_can_send_command_packet_now()) return; 5284 5285 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5286 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5287 5288 // send disconnected event right away - causes higher layer connections to get closed, too. 5289 hci_shutdown_connection(connection); 5290 return; 5291 } 5292 5293 if (hci_classic_supported()){ 5294 // disable page and inquiry scan 5295 if (!hci_can_send_command_packet_now()) return; 5296 5297 log_info("HCI_STATE_HALTING, disabling inq scans"); 5298 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5299 5300 // continue in next sub state 5301 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5302 break; 5303 } 5304 5305 /* fall through */ 5306 5307 case HCI_FALLING_ASLEEP_COMPLETE: 5308 log_info("HCI_STATE_HALTING, calling sleep"); 5309 // switch mode 5310 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5311 hci_emit_state(); 5312 break; 5313 5314 default: 5315 break; 5316 } 5317 } 5318 5319 #ifdef ENABLE_CLASSIC 5320 5321 static void hci_update_scan_enable(void){ 5322 // 2 = page scan, 1 = inq scan 5323 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 5324 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 5325 hci_run(); 5326 } 5327 5328 void gap_discoverable_control(uint8_t enable){ 5329 if (enable) enable = 1; // normalize argument 5330 5331 if (hci_stack->discoverable == enable){ 5332 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 5333 return; 5334 } 5335 5336 hci_stack->discoverable = enable; 5337 hci_update_scan_enable(); 5338 } 5339 5340 void gap_connectable_control(uint8_t enable){ 5341 if (enable) enable = 1; // normalize argument 5342 5343 // don't emit event 5344 if (hci_stack->connectable == enable) return; 5345 5346 hci_stack->connectable = enable; 5347 hci_update_scan_enable(); 5348 } 5349 #endif 5350 5351 void gap_local_bd_addr(bd_addr_t address_buffer){ 5352 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 5353 } 5354 5355 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5356 static void hci_host_num_completed_packets(void){ 5357 5358 // create packet manually as arrays are not supported and num_commands should not get reduced 5359 hci_reserve_packet_buffer(); 5360 uint8_t * packet = hci_get_outgoing_packet_buffer(); 5361 5362 uint16_t size = 0; 5363 uint16_t num_handles = 0; 5364 packet[size++] = 0x35; 5365 packet[size++] = 0x0c; 5366 size++; // skip param len 5367 size++; // skip num handles 5368 5369 // add { handle, packets } entries 5370 btstack_linked_item_t * it; 5371 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 5372 hci_connection_t * connection = (hci_connection_t *) it; 5373 if (connection->num_packets_completed){ 5374 little_endian_store_16(packet, size, connection->con_handle); 5375 size += 2; 5376 little_endian_store_16(packet, size, connection->num_packets_completed); 5377 size += 2; 5378 // 5379 num_handles++; 5380 connection->num_packets_completed = 0; 5381 } 5382 } 5383 5384 packet[2] = size - 3; 5385 packet[3] = num_handles; 5386 5387 hci_stack->host_completed_packets = 0; 5388 5389 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5390 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5391 5392 // release packet buffer for synchronous transport implementations 5393 if (hci_transport_synchronous()){ 5394 hci_release_packet_buffer(); 5395 hci_emit_transport_packet_sent(); 5396 } 5397 } 5398 #endif 5399 5400 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 5401 UNUSED(ds); 5402 hci_stack->substate = HCI_HALTING_CLOSE; 5403 hci_halting_run(); 5404 } 5405 5406 static bool hci_run_acl_fragments(void){ 5407 if (hci_stack->acl_fragmentation_total_size > 0u) { 5408 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 5409 hci_connection_t *connection = hci_connection_for_handle(con_handle); 5410 if (connection) { 5411 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 5412 hci_send_acl_packet_fragments(connection); 5413 return true; 5414 } 5415 } else { 5416 // connection gone -> discard further fragments 5417 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 5418 hci_stack->acl_fragmentation_total_size = 0; 5419 hci_stack->acl_fragmentation_pos = 0; 5420 } 5421 } 5422 return false; 5423 } 5424 5425 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5426 static bool hci_run_iso_fragments(void){ 5427 if (hci_stack->iso_fragmentation_total_size > 0u) { 5428 // TODO: flow control 5429 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 5430 hci_send_iso_packet_fragments(); 5431 return true; 5432 } 5433 } 5434 return false; 5435 } 5436 #endif 5437 5438 #ifdef ENABLE_CLASSIC 5439 5440 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5441 static bool hci_classic_operation_active(void) { 5442 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 5443 return true; 5444 } 5445 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 5446 return true; 5447 } 5448 btstack_linked_item_t * it; 5449 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 5450 hci_connection_t *connection = (hci_connection_t *) it; 5451 switch (connection->state) { 5452 case SENT_CREATE_CONNECTION: 5453 case SENT_CANCEL_CONNECTION: 5454 case SENT_DISCONNECT: 5455 return true; 5456 default: 5457 break; 5458 } 5459 } 5460 return false; 5461 } 5462 #endif 5463 5464 static bool hci_run_general_gap_classic(void){ 5465 5466 // assert stack is working and classic is active 5467 if (hci_classic_supported() == false) return false; 5468 if (hci_stack->state != HCI_STATE_WORKING) return false; 5469 5470 // decline incoming connections 5471 if (hci_stack->decline_reason){ 5472 uint8_t reason = hci_stack->decline_reason; 5473 hci_stack->decline_reason = 0; 5474 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 5475 return true; 5476 } 5477 5478 if (hci_stack->gap_tasks_classic != 0){ 5479 hci_run_gap_tasks_classic(); 5480 return true; 5481 } 5482 5483 // start/stop inquiry 5484 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 5485 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5486 if (hci_classic_operation_active() == false) 5487 #endif 5488 { 5489 uint8_t duration = hci_stack->inquiry_state; 5490 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 5491 if (hci_stack->inquiry_max_period_length != 0){ 5492 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); 5493 } else { 5494 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 5495 } 5496 return true; 5497 } 5498 } 5499 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 5500 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5501 hci_send_cmd(&hci_inquiry_cancel); 5502 return true; 5503 } 5504 5505 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 5506 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5507 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 5508 return true; 5509 } 5510 5511 // remote name request 5512 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 5513 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5514 if (hci_classic_operation_active() == false) 5515 #endif 5516 { 5517 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 5518 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 5519 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 5520 return true; 5521 } 5522 } 5523 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5524 // Local OOB data 5525 if (hci_stack->classic_read_local_oob_data){ 5526 hci_stack->classic_read_local_oob_data = false; 5527 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 5528 hci_send_cmd(&hci_read_local_extended_oob_data); 5529 } else { 5530 hci_send_cmd(&hci_read_local_oob_data); 5531 } 5532 } 5533 #endif 5534 // pairing 5535 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 5536 uint8_t state = hci_stack->gap_pairing_state; 5537 uint8_t pin_code[16]; 5538 switch (state){ 5539 case GAP_PAIRING_STATE_SEND_PIN: 5540 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5541 memset(pin_code, 0, 16); 5542 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 5543 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 5544 break; 5545 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 5546 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5547 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 5548 break; 5549 case GAP_PAIRING_STATE_SEND_PASSKEY: 5550 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5551 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 5552 break; 5553 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5554 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5555 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5556 break; 5557 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5558 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5559 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5560 break; 5561 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5562 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5563 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5564 break; 5565 default: 5566 break; 5567 } 5568 return true; 5569 } 5570 return false; 5571 } 5572 #endif 5573 5574 #ifdef ENABLE_BLE 5575 5576 #ifdef ENABLE_LE_CENTRAL 5577 static void hci_le_scan_stop(void){ 5578 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5579 if (hci_extended_advertising_supported()) { 5580 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5581 } else 5582 #endif 5583 { 5584 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5585 } 5586 } 5587 5588 static void 5589 hci_send_le_create_connection(uint8_t initiator_filter_policy, bd_addr_type_t address_type, uint8_t *address) { 5590 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5591 if (hci_extended_advertising_supported()) { 5592 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 5593 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 5594 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 5595 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 5596 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 5597 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 5598 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 5599 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 5600 hci_send_cmd(&hci_le_extended_create_connection, 5601 initiator_filter_policy, 5602 hci_stack->le_connection_own_addr_type, // our addr type: 5603 address_type, // peer address type 5604 address, // peer bd addr 5605 1, // initiating PHY - 1M 5606 le_connection_scan_interval, // conn scan interval 5607 le_connection_scan_window, // conn scan windows 5608 le_connection_interval_min, // conn interval min 5609 le_connection_interval_max, // conn interval max 5610 le_connection_latency, // conn latency 5611 le_supervision_timeout, // conn latency 5612 le_minimum_ce_length, // min ce length 5613 le_maximum_ce_length // max ce length 5614 ); 5615 } 5616 else 5617 #endif 5618 { 5619 hci_send_cmd(&hci_le_create_connection, 5620 hci_stack->le_connection_scan_interval, // conn scan interval 5621 hci_stack->le_connection_scan_window, // conn scan windows 5622 initiator_filter_policy, // don't use whitelist 5623 address_type, // peer address type 5624 address, // peer bd addr 5625 hci_stack->le_connection_own_addr_type, // our addr type: 5626 hci_stack->le_connection_interval_min, // conn interval min 5627 hci_stack->le_connection_interval_max, // conn interval max 5628 hci_stack->le_connection_latency, // conn latency 5629 hci_stack->le_supervision_timeout, // conn latency 5630 hci_stack->le_minimum_ce_length, // min ce length 5631 hci_stack->le_maximum_ce_length // max ce length 5632 ); 5633 } 5634 } 5635 #endif 5636 5637 #ifdef ENABLE_LE_PERIPHERAL 5638 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5639 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5640 uint8_t operation = 0; 5641 if (pos == 0){ 5642 // first fragment or complete data 5643 operation |= 1; 5644 } 5645 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5646 // last fragment or complete data 5647 operation |= 2; 5648 } 5649 return operation; 5650 } 5651 #endif 5652 #endif 5653 5654 static bool hci_run_general_gap_le(void){ 5655 5656 btstack_linked_list_iterator_t lit; 5657 5658 // Phase 1: collect what to stop 5659 5660 #ifdef ENABLE_LE_CENTRAL 5661 bool scanning_stop = false; 5662 bool connecting_stop = false; 5663 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5664 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5665 bool periodic_sync_stop = false; 5666 #endif 5667 #endif 5668 #endif 5669 5670 #ifdef ENABLE_LE_PERIPHERAL 5671 bool advertising_stop = false; 5672 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5673 le_advertising_set_t * advertising_stop_set = NULL; 5674 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5675 bool periodic_advertising_stop = false; 5676 #endif 5677 #endif 5678 #endif 5679 5680 // check if own address changes 5681 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5682 5683 // check if whitelist needs modification 5684 bool whitelist_modification_pending = false; 5685 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5686 while (btstack_linked_list_iterator_has_next(&lit)){ 5687 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5688 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5689 whitelist_modification_pending = true; 5690 break; 5691 } 5692 } 5693 5694 // check if resolving list needs modification 5695 bool resolving_list_modification_pending = false; 5696 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5697 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5698 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5699 resolving_list_modification_pending = true; 5700 } 5701 #endif 5702 5703 #ifdef ENABLE_LE_CENTRAL 5704 5705 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5706 // check if periodic advertiser list needs modification 5707 bool periodic_list_modification_pending = false; 5708 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5709 while (btstack_linked_list_iterator_has_next(&lit)){ 5710 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5711 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5712 periodic_list_modification_pending = true; 5713 break; 5714 } 5715 } 5716 #endif 5717 5718 // scanning control 5719 if (hci_stack->le_scanning_active) { 5720 // stop if: 5721 // - parameter change required 5722 // - it's disabled 5723 // - whitelist change required but used for scanning 5724 // - resolving list modified 5725 // - own address changes 5726 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5727 if ((hci_stack->le_scanning_param_update) || 5728 !hci_stack->le_scanning_enabled || 5729 (scanning_uses_whitelist && whitelist_modification_pending) || 5730 resolving_list_modification_pending || 5731 random_address_change){ 5732 5733 scanning_stop = true; 5734 } 5735 } 5736 5737 // connecting control 5738 bool connecting_with_whitelist; 5739 switch (hci_stack->le_connecting_state){ 5740 case LE_CONNECTING_DIRECT: 5741 case LE_CONNECTING_WHITELIST: 5742 // stop connecting if: 5743 // - connecting uses white and whitelist modification pending 5744 // - if it got disabled 5745 // - resolving list modified 5746 // - own address changes 5747 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5748 if ((connecting_with_whitelist && whitelist_modification_pending) || 5749 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5750 resolving_list_modification_pending || 5751 random_address_change) { 5752 5753 connecting_stop = true; 5754 } 5755 break; 5756 default: 5757 break; 5758 } 5759 5760 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5761 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5762 // periodic sync control 5763 bool sync_with_advertiser_list; 5764 switch(hci_stack->le_periodic_sync_state){ 5765 case LE_CONNECTING_DIRECT: 5766 case LE_CONNECTING_WHITELIST: 5767 // stop sync if: 5768 // - sync with advertiser list and advertiser list modification pending 5769 // - if it got disabled 5770 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5771 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5772 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5773 periodic_sync_stop = true; 5774 } 5775 break; 5776 default: 5777 break; 5778 } 5779 #endif 5780 #endif 5781 5782 #endif /* ENABLE_LE_CENTRAL */ 5783 5784 #ifdef ENABLE_LE_PERIPHERAL 5785 // le advertisement control 5786 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5787 // stop if: 5788 // - parameter change required 5789 // - random address used in advertising and changes 5790 // - it's disabled 5791 // - whitelist change required but used for advertisement filter policy 5792 // - resolving list modified 5793 // - own address changes 5794 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5795 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5796 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5797 if (advertising_change || 5798 (advertising_uses_random_address && random_address_change) || 5799 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5800 (advertising_uses_whitelist && whitelist_modification_pending) || 5801 resolving_list_modification_pending || 5802 random_address_change) { 5803 5804 advertising_stop = true; 5805 } 5806 } 5807 5808 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5809 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5810 btstack_linked_list_iterator_t it; 5811 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5812 while (btstack_linked_list_iterator_has_next(&it)){ 5813 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5814 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5815 // stop if: 5816 // - parameter change required 5817 // - random address used in connectable advertising and changes 5818 // - it's disabled 5819 // - whitelist change required but used for advertisement filter policy 5820 // - resolving list modified 5821 // - own address changes 5822 // - advertisement set will be removed 5823 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5824 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5825 bool advertising_uses_random_address = 5826 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5827 advertising_connectable; 5828 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5829 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5830 bool advertising_set_random_address_change = 5831 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5832 bool advertising_set_will_be_removed = 5833 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5834 if (advertising_parameter_change || 5835 (advertising_uses_random_address && advertising_set_random_address_change) || 5836 (advertising_enabled == false) || 5837 (advertising_uses_whitelist && whitelist_modification_pending) || 5838 resolving_list_modification_pending || 5839 advertising_set_will_be_removed) { 5840 5841 advertising_stop = true; 5842 advertising_stop_set = advertising_set; 5843 break; 5844 } 5845 } 5846 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5847 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5848 // stop if: 5849 // - it's disabled 5850 // - parameter change required 5851 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5852 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5853 if ((periodic_enabled == false) || periodic_parameter_change){ 5854 periodic_advertising_stop = true; 5855 advertising_stop_set = advertising_set; 5856 } 5857 } 5858 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5859 } 5860 } 5861 #endif 5862 5863 #endif 5864 5865 5866 // Phase 2: stop everything that should be off during modifications 5867 5868 5869 // 2.1 Outgoing connection 5870 #ifdef ENABLE_LE_CENTRAL 5871 if (connecting_stop){ 5872 hci_send_cmd(&hci_le_create_connection_cancel); 5873 return true; 5874 } 5875 #endif 5876 5877 // 2.2 Scanning 5878 #ifdef ENABLE_LE_CENTRAL 5879 if (scanning_stop){ 5880 hci_stack->le_scanning_active = false; 5881 hci_le_scan_stop(); 5882 return true; 5883 } 5884 5885 // 2.3 Periodic Sync 5886 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5887 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5888 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5889 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5890 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5891 return true; 5892 } 5893 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5894 if (periodic_sync_stop){ 5895 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5896 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5897 return true; 5898 } 5899 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5900 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5901 #endif /* ENABLE_LE_CENTRAL */ 5902 5903 // 2.4 Advertising: legacy, extended, periodic 5904 #ifdef ENABLE_LE_PERIPHERAL 5905 if (advertising_stop){ 5906 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5907 if (hci_extended_advertising_supported()) { 5908 uint8_t advertising_stop_handle; 5909 if (advertising_stop_set != NULL){ 5910 advertising_stop_handle = advertising_stop_set->advertising_handle; 5911 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5912 } else { 5913 advertising_stop_handle = 0; 5914 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5915 } 5916 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5917 const uint16_t durations[] = { 0 }; 5918 const uint16_t max_events[] = { 0 }; 5919 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5920 } else 5921 #endif 5922 { 5923 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5924 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5925 } 5926 return true; 5927 } 5928 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5929 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5930 if (periodic_advertising_stop){ 5931 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5932 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5933 return true; 5934 } 5935 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5936 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5937 #endif /* ENABLE_LE_PERIPHERAL */ 5938 5939 5940 // Phase 3: modify 5941 5942 if (random_address_change){ 5943 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5944 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5945 if (hci_extended_advertising_supported()) { 5946 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5947 } 5948 #endif 5949 { 5950 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5951 } 5952 return true; 5953 } 5954 5955 #ifdef ENABLE_LE_CENTRAL 5956 if (hci_stack->le_scanning_param_update){ 5957 hci_stack->le_scanning_param_update = false; 5958 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5959 if (hci_extended_advertising_supported()){ 5960 // prepare arrays for all PHYs 5961 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5962 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5963 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5964 uint8_t scanning_phys = 1; // LE 1M PHY 5965 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5966 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5967 } else 5968 #endif 5969 { 5970 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5971 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5972 } 5973 return true; 5974 } 5975 #endif 5976 5977 #ifdef ENABLE_LE_PERIPHERAL 5978 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5979 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5980 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5981 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5982 if (hci_extended_advertising_supported()){ 5983 // map advertisment type to advertising event properties 5984 uint16_t adv_event_properties = 0; 5985 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5986 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5987 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5988 } 5989 hci_stack->le_advertising_set_in_current_command = 0; 5990 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5991 0, 5992 adv_event_properties, 5993 hci_stack->le_advertisements_interval_min, 5994 hci_stack->le_advertisements_interval_max, 5995 hci_stack->le_advertisements_channel_map, 5996 hci_stack->le_advertisements_own_addr_type, 5997 hci_stack->le_advertisements_direct_address_type, 5998 hci_stack->le_advertisements_direct_address, 5999 hci_stack->le_advertisements_filter_policy, 6000 0x7f, // tx power: no preference 6001 0x01, // primary adv phy: LE 1M 6002 0, // secondary adv max skip 6003 0, // secondary adv phy 6004 0, // adv sid 6005 0 // scan request notification 6006 ); 6007 } 6008 #endif 6009 { 6010 hci_send_cmd(&hci_le_set_advertising_parameters, 6011 hci_stack->le_advertisements_interval_min, 6012 hci_stack->le_advertisements_interval_max, 6013 hci_stack->le_advertisements_type, 6014 hci_stack->le_advertisements_own_addr_type, 6015 hci_stack->le_advertisements_direct_address_type, 6016 hci_stack->le_advertisements_direct_address, 6017 hci_stack->le_advertisements_channel_map, 6018 hci_stack->le_advertisements_filter_policy); 6019 } 6020 return true; 6021 } 6022 6023 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 6024 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6025 uint8_t adv_data_clean[31]; 6026 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 6027 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 6028 hci_stack->le_advertisements_data_len); 6029 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 6030 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6031 if (hci_extended_advertising_supported()){ 6032 hci_stack->le_advertising_set_in_current_command = 0; 6033 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 6034 } else 6035 #endif 6036 { 6037 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 6038 } 6039 return true; 6040 } 6041 6042 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 6043 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6044 uint8_t scan_data_clean[31]; 6045 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 6046 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 6047 hci_stack->le_scan_response_data_len); 6048 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 6049 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6050 if (hci_extended_advertising_supported()){ 6051 hci_stack->le_advertising_set_in_current_command = 0; 6052 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 6053 } else 6054 #endif 6055 { 6056 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 6057 } 6058 return true; 6059 } 6060 6061 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6062 if (hci_extended_advertising_supported()) { 6063 btstack_linked_list_iterator_t it; 6064 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6065 while (btstack_linked_list_iterator_has_next(&it)){ 6066 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 6067 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 6068 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 6069 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6070 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 6071 return true; 6072 } 6073 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 6074 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6075 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 6076 return true; 6077 } 6078 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 6079 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6080 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6081 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 6082 advertising_set->advertising_handle, 6083 advertising_set->extended_params.advertising_event_properties, 6084 advertising_set->extended_params.primary_advertising_interval_min, 6085 advertising_set->extended_params.primary_advertising_interval_max, 6086 advertising_set->extended_params.primary_advertising_channel_map, 6087 advertising_set->extended_params.own_address_type, 6088 advertising_set->extended_params.peer_address_type, 6089 advertising_set->extended_params.peer_address, 6090 advertising_set->extended_params.advertising_filter_policy, 6091 advertising_set->extended_params.advertising_tx_power, 6092 advertising_set->extended_params.primary_advertising_phy, 6093 advertising_set->extended_params.secondary_advertising_max_skip, 6094 advertising_set->extended_params.secondary_advertising_phy, 6095 advertising_set->extended_params.advertising_sid, 6096 advertising_set->extended_params.scan_request_notification_enable 6097 ); 6098 return true; 6099 } 6100 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 6101 uint16_t pos = advertising_set->adv_data_pos; 6102 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 6103 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6104 if ((operation & 0x02) != 0){ 6105 // last fragment or complete data 6106 operation |= 2; 6107 advertising_set->adv_data_pos = 0; 6108 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6109 } else { 6110 advertising_set->adv_data_pos += data_to_upload; 6111 } 6112 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6113 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 6114 return true; 6115 } 6116 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 6117 uint16_t pos = advertising_set->scan_data_pos; 6118 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 6119 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6120 if ((operation & 0x02) != 0){ 6121 advertising_set->scan_data_pos = 0; 6122 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6123 } else { 6124 advertising_set->scan_data_pos += data_to_upload; 6125 } 6126 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6127 hci_send_cmd(&hci_le_set_extended_scan_response_data, advertising_set->advertising_handle, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 6128 return true; 6129 } 6130 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6131 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 6132 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6133 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6134 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 6135 advertising_set->advertising_handle, 6136 advertising_set->periodic_params.periodic_advertising_interval_min, 6137 advertising_set->periodic_params.periodic_advertising_interval_max, 6138 advertising_set->periodic_params.periodic_advertising_properties); 6139 return true; 6140 } 6141 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 6142 uint16_t pos = advertising_set->periodic_data_pos; 6143 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 6144 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6145 if ((operation & 0x02) != 0){ 6146 // last fragment or complete data 6147 operation |= 2; 6148 advertising_set->periodic_data_pos = 0; 6149 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6150 } else { 6151 advertising_set->periodic_data_pos += data_to_upload; 6152 } 6153 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6154 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 6155 return true; 6156 } 6157 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6158 } 6159 } 6160 #endif 6161 6162 #endif 6163 6164 #ifdef ENABLE_LE_CENTRAL 6165 // if connect with whitelist was active and is not cancelled yet, wait until next time 6166 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 6167 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6168 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 6169 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 6170 #endif 6171 #endif 6172 6173 // LE Whitelist Management 6174 if (whitelist_modification_pending){ 6175 // add/remove entries 6176 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6177 while (btstack_linked_list_iterator_has_next(&lit)){ 6178 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6179 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 6180 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6181 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 6182 return true; 6183 } 6184 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 6185 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 6186 entry->state |= LE_WHITELIST_ON_CONTROLLER; 6187 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 6188 return true; 6189 } 6190 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 6191 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6192 btstack_memory_whitelist_entry_free(entry); 6193 } 6194 } 6195 } 6196 6197 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6198 // LE Resolving List Management 6199 if (resolving_list_supported) { 6200 uint16_t i; 6201 switch (hci_stack->le_resolving_list_state) { 6202 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 6203 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6204 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 6205 return true; 6206 case LE_RESOLVING_LIST_READ_SIZE: 6207 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 6208 hci_send_cmd(&hci_le_read_resolving_list_size); 6209 return true; 6210 case LE_RESOLVING_LIST_SEND_CLEAR: 6211 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_UPDATES_ENTRIES; 6212 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 6213 sizeof(hci_stack->le_resolving_list_add_entries)); 6214 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 6215 sizeof(hci_stack->le_resolving_list_remove_entries)); 6216 hci_send_cmd(&hci_le_clear_resolving_list); 6217 return true; 6218 case LE_RESOLVING_LIST_UPDATES_ENTRIES: 6219 // first remove old entries 6220 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6221 uint8_t offset = i >> 3; 6222 uint8_t mask = 1 << (i & 7); 6223 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 6224 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 6225 bd_addr_t peer_identity_addreses; 6226 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6227 sm_key_t peer_irk; 6228 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6229 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6230 6231 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 6232 // trigger whitelist entry 'update' (work around for controller bug) 6233 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6234 while (btstack_linked_list_iterator_has_next(&lit)) { 6235 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 6236 if (entry->address_type != peer_identity_addr_type) continue; 6237 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 6238 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 6239 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 6240 } 6241 #endif 6242 6243 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 6244 peer_identity_addreses); 6245 return true; 6246 } 6247 6248 // then add new entries 6249 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6250 uint8_t offset = i >> 3; 6251 uint8_t mask = 1 << (i & 7); 6252 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 6253 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 6254 bd_addr_t peer_identity_addreses; 6255 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6256 sm_key_t peer_irk; 6257 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6258 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6259 if (btstack_is_null(peer_irk, 16)) continue; 6260 const uint8_t *local_irk = gap_get_persistent_irk(); 6261 // command uses format specifier 'P' that stores 16-byte value without flip 6262 uint8_t local_irk_flipped[16]; 6263 uint8_t peer_irk_flipped[16]; 6264 reverse_128(local_irk, local_irk_flipped); 6265 reverse_128(peer_irk, peer_irk_flipped); 6266 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 6267 peer_irk_flipped, local_irk_flipped); 6268 return true; 6269 } 6270 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6271 break; 6272 6273 default: 6274 break; 6275 } 6276 } 6277 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6278 #endif 6279 6280 #ifdef ENABLE_LE_CENTRAL 6281 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6282 // LE Whitelist Management 6283 if (periodic_list_modification_pending){ 6284 // add/remove entries 6285 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 6286 while (btstack_linked_list_iterator_has_next(&lit)){ 6287 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 6288 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 6289 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 6290 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 6291 return true; 6292 } 6293 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 6294 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 6295 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 6296 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address, entry->sid); 6297 return true; 6298 } 6299 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 6300 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 6301 btstack_memory_periodic_advertiser_list_entry_free(entry); 6302 } 6303 } 6304 } 6305 #endif 6306 #endif 6307 6308 #ifdef ENABLE_LE_CENTRAL 6309 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6310 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6311 if (hci_stack->le_past_set_default_params){ 6312 hci_stack->le_past_set_default_params = false; 6313 hci_send_cmd(&hci_le_set_default_periodic_advertising_sync_transfer_parameters, 6314 hci_stack->le_past_mode, 6315 hci_stack->le_past_skip, 6316 hci_stack->le_past_sync_timeout, 6317 hci_stack->le_past_cte_type); 6318 return true; 6319 } 6320 #endif 6321 #endif 6322 #endif 6323 6324 // post-pone all actions until stack is fully working 6325 if (hci_stack->state != HCI_STATE_WORKING) return false; 6326 6327 // advertisements, active scanning, and creating connections requires random address to be set if using private address 6328 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 6329 6330 // Phase 4: restore state 6331 6332 #ifdef ENABLE_LE_CENTRAL 6333 // re-start scanning 6334 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 6335 hci_stack->le_scanning_active = true; 6336 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6337 if (hci_extended_advertising_supported()){ 6338 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, hci_stack->le_scan_filter_duplicates, 0, 0); 6339 } else 6340 #endif 6341 { 6342 hci_send_cmd(&hci_le_set_scan_enable, 1, hci_stack->le_scan_filter_duplicates); 6343 } 6344 return true; 6345 } 6346 #endif 6347 6348 #ifdef ENABLE_LE_CENTRAL 6349 // re-start connecting 6350 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 6351 bd_addr_t null_addr; 6352 memset(null_addr, 0, 6); 6353 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6354 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6355 hci_send_le_create_connection(1, 0, null_addr); 6356 return true; 6357 } 6358 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6359 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 6360 switch(hci_stack->le_periodic_sync_request){ 6361 case LE_CONNECTING_DIRECT: 6362 case LE_CONNECTING_WHITELIST: 6363 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 6364 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 6365 hci_stack->le_periodic_sync_options, 6366 hci_stack->le_periodic_sync_advertising_sid, 6367 hci_stack->le_periodic_sync_advertiser_address_type, 6368 hci_stack->le_periodic_sync_advertiser_address, 6369 hci_stack->le_periodic_sync_skip, 6370 hci_stack->le_periodic_sync_timeout, 6371 hci_stack->le_periodic_sync_cte_type); 6372 return true; 6373 default: 6374 break; 6375 } 6376 } 6377 #endif 6378 #endif 6379 6380 #ifdef ENABLE_LE_PERIPHERAL 6381 // re-start advertising 6382 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6383 // check if advertisements should be enabled given 6384 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6385 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 6386 6387 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6388 if (hci_extended_advertising_supported()){ 6389 const uint8_t advertising_handles[] = { 0 }; 6390 const uint16_t durations[] = { 0 }; 6391 const uint16_t max_events[] = { 0 }; 6392 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6393 } else 6394 #endif 6395 { 6396 hci_send_cmd(&hci_le_set_advertise_enable, 1); 6397 } 6398 return true; 6399 } 6400 6401 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6402 if (hci_extended_advertising_supported()) { 6403 btstack_linked_list_iterator_t it; 6404 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6405 while (btstack_linked_list_iterator_has_next(&it)) { 6406 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6407 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6408 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6409 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 6410 const uint16_t durations[] = { advertising_set->enable_timeout }; 6411 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 6412 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6413 return true; 6414 } 6415 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6416 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 6417 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 6418 uint8_t enable = 1; 6419 if (advertising_set->periodic_include_adi){ 6420 enable |= 2; 6421 } 6422 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 6423 return true; 6424 } 6425 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6426 } 6427 } 6428 #endif 6429 #endif 6430 6431 return false; 6432 } 6433 6434 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6435 static bool hci_run_iso_tasks(void){ 6436 btstack_linked_list_iterator_t it; 6437 6438 if (hci_stack->iso_active_operation_type != HCI_ISO_TYPE_INVALID) { 6439 return false; 6440 } 6441 6442 // BIG 6443 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 6444 while (btstack_linked_list_iterator_has_next(&it)){ 6445 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 6446 switch (big->state){ 6447 case LE_AUDIO_BIG_STATE_CREATE: 6448 hci_stack->iso_active_operation_group_id = big->params->big_handle; 6449 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6450 big->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6451 hci_send_cmd(&hci_le_create_big, 6452 big->params->big_handle, 6453 big->params->advertising_handle, 6454 big->params->num_bis, 6455 big->params->sdu_interval_us, 6456 big->params->max_sdu, 6457 big->params->max_transport_latency_ms, 6458 big->params->rtn, 6459 big->params->phy, 6460 big->params->packing, 6461 big->params->framing, 6462 big->params->encryption, 6463 big->params->broadcast_code); 6464 return true; 6465 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6466 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6467 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); 6468 return true; 6469 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6470 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6471 hci_send_cmd(&hci_le_terminate_big, big->big_handle, big->state_vars.status); 6472 return true; 6473 case LE_AUDIO_BIG_STATE_TERMINATE: 6474 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6475 hci_send_cmd(&hci_le_terminate_big, big->big_handle, ERROR_CODE_SUCCESS); 6476 return true; 6477 default: 6478 break; 6479 } 6480 } 6481 6482 // BIG Sync 6483 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 6484 while (btstack_linked_list_iterator_has_next(&it)){ 6485 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 6486 switch (big_sync->state){ 6487 case LE_AUDIO_BIG_STATE_CREATE: 6488 hci_stack->iso_active_operation_group_id = big_sync->params->big_handle; 6489 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6490 big_sync->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6491 hci_send_cmd(&hci_le_big_create_sync, 6492 big_sync->params->big_handle, 6493 big_sync->params->sync_handle, 6494 big_sync->params->encryption, 6495 big_sync->params->broadcast_code, 6496 big_sync->params->mse, 6497 big_sync->params->big_sync_timeout_10ms, 6498 big_sync->params->num_bis, 6499 big_sync->params->bis_indices); 6500 return true; 6501 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6502 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6503 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); 6504 return true; 6505 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6506 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6507 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6508 return true; 6509 case LE_AUDIO_BIG_STATE_TERMINATE: 6510 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6511 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6512 return true; 6513 default: 6514 break; 6515 } 6516 } 6517 6518 // CIG 6519 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_cigs); 6520 while (btstack_linked_list_iterator_has_next(&it)) { 6521 le_audio_cig_t *cig = (le_audio_cig_t *) btstack_linked_list_iterator_next(&it); 6522 uint8_t i; 6523 // Set CIG Parameters 6524 uint8_t cis_id[MAX_NR_CIS]; 6525 uint16_t max_sdu_c_to_p[MAX_NR_CIS]; 6526 uint16_t max_sdu_p_to_c[MAX_NR_CIS]; 6527 uint8_t phy_c_to_p[MAX_NR_CIS]; 6528 uint8_t phy_p_to_c[MAX_NR_CIS]; 6529 uint8_t rtn_c_to_p[MAX_NR_CIS]; 6530 uint8_t rtn_p_to_c[MAX_NR_CIS]; 6531 switch (cig->state) { 6532 case LE_AUDIO_CIG_STATE_CREATE: 6533 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6534 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6535 cig->state = LE_AUDIO_CIG_STATE_W4_ESTABLISHED; 6536 le_audio_cig_params_t * params = cig->params; 6537 for (i = 0; i < params->num_cis; i++) { 6538 le_audio_cis_params_t * cis_params = &cig->params->cis_params[i]; 6539 cis_id[i] = cis_params->cis_id; 6540 max_sdu_c_to_p[i] = cis_params->max_sdu_c_to_p; 6541 max_sdu_p_to_c[i] = cis_params->max_sdu_p_to_c; 6542 phy_c_to_p[i] = cis_params->phy_c_to_p; 6543 phy_p_to_c[i] = cis_params->phy_p_to_c; 6544 rtn_c_to_p[i] = cis_params->rtn_c_to_p; 6545 rtn_p_to_c[i] = cis_params->rtn_p_to_c; 6546 } 6547 hci_send_cmd(&hci_le_set_cig_parameters, 6548 cig->cig_id, 6549 params->sdu_interval_c_to_p, 6550 params->sdu_interval_p_to_c, 6551 params->worst_case_sca, 6552 params->packing, 6553 params->framing, 6554 params->max_transport_latency_c_to_p, 6555 params->max_transport_latency_p_to_c, 6556 params->num_cis, 6557 cis_id, 6558 max_sdu_c_to_p, 6559 max_sdu_p_to_c, 6560 phy_c_to_p, 6561 phy_p_to_c, 6562 rtn_c_to_p, 6563 rtn_p_to_c 6564 ); 6565 return true; 6566 case LE_AUDIO_CIG_STATE_CREATE_CIS: 6567 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6568 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6569 cig->state = LE_AUDIO_CIG_STATE_W4_CREATE_CIS; 6570 for (i=0;i<cig->num_cis;i++){ 6571 cig->cis_setup_active[i] = true; 6572 } 6573 hci_send_cmd(&hci_le_create_cis, cig->num_cis, cig->cis_con_handles, cig->acl_con_handles); 6574 return true; 6575 case LE_AUDIO_CIG_STATE_SETUP_ISO_PATH: 6576 while (cig->state_vars.next_cis < (cig->num_cis * 2)){ 6577 // find next path to setup 6578 uint8_t cis_index = cig->state_vars.next_cis >> 1; 6579 if (cig->cis_established[cis_index] == false) { 6580 continue; 6581 } 6582 uint8_t cis_direction = cig->state_vars.next_cis & 1; 6583 bool setup = true; 6584 if (cis_direction == 0){ 6585 // 0 - input - host to controller 6586 // we are central => central to peripheral 6587 setup &= cig->params->cis_params[cis_index].max_sdu_c_to_p > 0; 6588 } else { 6589 // 1 - output - controller to host 6590 // we are central => peripheral to central 6591 setup &= cig->params->cis_params[cis_index].max_sdu_p_to_c > 0; 6592 } 6593 if (setup){ 6594 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6595 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6596 cig->state = LE_AUDIO_CIG_STATE_W4_SETUP_ISO_PATH; 6597 hci_send_cmd(&hci_le_setup_iso_data_path, cig->cis_con_handles[cis_index], cis_direction, 0, 0, 0, 0, 0, 0, NULL); 6598 return true; 6599 } 6600 cig->state_vars.next_cis++; 6601 } 6602 // emit done 6603 cig->state = LE_AUDIO_CIG_STATE_ACTIVE; 6604 default: 6605 break; 6606 } 6607 } 6608 6609 // CIS Accept/Reject 6610 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 6611 while (btstack_linked_list_iterator_has_next(&it)) { 6612 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 6613 hci_con_handle_t con_handle; 6614 switch (iso_stream->state){ 6615 case HCI_ISO_STREAM_W2_ACCEPT: 6616 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 6617 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6618 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6619 hci_send_cmd(&hci_le_accept_cis_request, iso_stream->con_handle); 6620 return true; 6621 case HCI_ISO_STREAM_W2_REJECT: 6622 con_handle = iso_stream->con_handle; 6623 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6624 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6625 hci_iso_stream_finalize(iso_stream); 6626 hci_send_cmd(&hci_le_reject_cis_request, con_handle, ERROR_CODE_REMOTE_DEVICE_TERMINATED_CONNECTION_DUE_TO_LOW_RESOURCES); 6627 return true; 6628 case HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT: 6629 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6630 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6631 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ISO_SETUP_INPUT; 6632 hci_send_cmd(&hci_le_setup_iso_data_path, iso_stream->con_handle, 0, 0, 0, 0, 0, 0, 0, NULL); 6633 break; 6634 case HCI_ISO_STREAM_STATE_W2_SETUP_ISO_OUTPUT: 6635 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6636 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6637 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ISO_SETUP_OUTPUT; 6638 hci_send_cmd(&hci_le_setup_iso_data_path, iso_stream->con_handle, 1, 0, 0, 0, 0, 0, 0, NULL); 6639 break; 6640 default: 6641 break; 6642 } 6643 } 6644 6645 return false; 6646 } 6647 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6648 #endif 6649 6650 static bool hci_run_general_pending_commands(void){ 6651 btstack_linked_item_t * it; 6652 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6653 hci_connection_t * connection = (hci_connection_t *) it; 6654 6655 switch(connection->state){ 6656 case SEND_CREATE_CONNECTION: 6657 switch(connection->address_type){ 6658 #ifdef ENABLE_CLASSIC 6659 case BD_ADDR_TYPE_ACL: 6660 log_info("sending hci_create_connection"); 6661 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 6662 break; 6663 #endif 6664 default: 6665 #ifdef ENABLE_BLE 6666 #ifdef ENABLE_LE_CENTRAL 6667 log_info("sending hci_le_create_connection"); 6668 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6669 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6670 hci_send_le_create_connection(0, connection->address_type, connection->address); 6671 connection->state = SENT_CREATE_CONNECTION; 6672 #endif 6673 #endif 6674 break; 6675 } 6676 return true; 6677 6678 #ifdef ENABLE_CLASSIC 6679 case RECEIVED_CONNECTION_REQUEST: 6680 connection->role = HCI_ROLE_SLAVE; 6681 if (connection->address_type == BD_ADDR_TYPE_ACL){ 6682 log_info("sending hci_accept_connection_request"); 6683 connection->state = ACCEPTED_CONNECTION_REQUEST; 6684 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 6685 return true; 6686 } 6687 break; 6688 #endif 6689 case SEND_DISCONNECT: 6690 connection->state = SENT_DISCONNECT; 6691 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6692 return true; 6693 6694 default: 6695 break; 6696 } 6697 6698 // no further commands if connection is about to get shut down 6699 if (connection->state == SENT_DISCONNECT) continue; 6700 6701 #ifdef ENABLE_CLASSIC 6702 6703 // Handling link key request requires remote supported features 6704 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 6705 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 6706 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6707 6708 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 6709 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 6710 if (have_link_key && security_level_sufficient){ 6711 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 6712 } else { 6713 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 6714 } 6715 return true; 6716 } 6717 6718 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 6719 log_info("denying to pin request"); 6720 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 6721 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 6722 return true; 6723 } 6724 6725 // security assessment requires remote features 6726 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 6727 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 6728 hci_ssp_assess_security_on_io_cap_request(connection); 6729 // 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 6730 } 6731 6732 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 6733 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6734 // set authentication requirements: 6735 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 6736 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 6737 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 6738 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 6739 authreq |= 1; 6740 } 6741 bool bonding = hci_stack->bondable; 6742 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 6743 // if we have received IO Cap Response, we're in responder role 6744 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6745 if (bonding && !remote_bonding){ 6746 log_info("Remote not bonding, dropping local flag"); 6747 bonding = false; 6748 } 6749 } 6750 if (bonding){ 6751 if (connection->bonding_flags & BONDING_DEDICATED){ 6752 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6753 } else { 6754 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 6755 } 6756 } 6757 uint8_t have_oob_data = 0; 6758 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6759 if (connection->classic_oob_c_192 != NULL){ 6760 have_oob_data |= 1; 6761 } 6762 if (connection->classic_oob_c_256 != NULL){ 6763 have_oob_data |= 2; 6764 } 6765 #endif 6766 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 6767 return true; 6768 } 6769 6770 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 6771 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6772 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 6773 return true; 6774 } 6775 6776 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6777 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6778 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6779 const uint8_t zero[16] = { 0 }; 6780 const uint8_t * r_192 = zero; 6781 const uint8_t * c_192 = zero; 6782 const uint8_t * r_256 = zero; 6783 const uint8_t * c_256 = zero; 6784 // verify P-256 OOB 6785 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6786 c_256 = connection->classic_oob_c_256; 6787 if (connection->classic_oob_r_256 != NULL) { 6788 r_256 = connection->classic_oob_r_256; 6789 } 6790 } 6791 // verify P-192 OOB 6792 if ((connection->classic_oob_c_192 != NULL)) { 6793 c_192 = connection->classic_oob_c_192; 6794 if (connection->classic_oob_r_192 != NULL) { 6795 r_192 = connection->classic_oob_r_192; 6796 } 6797 } 6798 6799 // assess security 6800 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6801 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6802 if (need_level_4 && !can_reach_level_4){ 6803 log_info("Level 4 required, but not possible -> abort"); 6804 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6805 // send oob negative reply 6806 c_256 = NULL; 6807 c_192 = NULL; 6808 } 6809 6810 // Reply 6811 if (c_256 != zero) { 6812 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6813 } else if (c_192 != zero){ 6814 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6815 } else { 6816 hci_stack->classic_oob_con_handle = connection->con_handle; 6817 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6818 } 6819 return true; 6820 } 6821 #endif 6822 6823 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6824 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6825 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6826 return true; 6827 } 6828 6829 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6830 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6831 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6832 return true; 6833 } 6834 6835 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6836 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6837 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6838 return true; 6839 } 6840 6841 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6842 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6843 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6844 connection->state = SENT_DISCONNECT; 6845 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6846 return true; 6847 } 6848 6849 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6850 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6851 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6852 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6853 return true; 6854 } 6855 6856 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6857 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6858 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6859 return true; 6860 } 6861 6862 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6863 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6864 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6865 return true; 6866 } 6867 6868 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6869 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6870 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6871 return true; 6872 } 6873 6874 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6875 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6876 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6877 return true; 6878 } 6879 6880 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6881 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6882 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6883 return true; 6884 } 6885 #endif 6886 6887 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6888 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6889 #ifdef ENABLE_CLASSIC 6890 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6891 #endif 6892 if (connection->state != SENT_DISCONNECT){ 6893 connection->state = SENT_DISCONNECT; 6894 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6895 return true; 6896 } 6897 } 6898 6899 #ifdef ENABLE_CLASSIC 6900 uint16_t sniff_min_interval; 6901 switch (connection->sniff_min_interval){ 6902 case 0: 6903 break; 6904 case 0xffff: 6905 connection->sniff_min_interval = 0; 6906 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6907 return true; 6908 default: 6909 sniff_min_interval = connection->sniff_min_interval; 6910 connection->sniff_min_interval = 0; 6911 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6912 return true; 6913 } 6914 6915 if (connection->sniff_subrating_max_latency != 0xffff){ 6916 uint16_t max_latency = connection->sniff_subrating_max_latency; 6917 connection->sniff_subrating_max_latency = 0; 6918 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6919 return true; 6920 } 6921 6922 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6923 uint8_t service_type = (uint8_t) connection->qos_service_type; 6924 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6925 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); 6926 return true; 6927 } 6928 6929 if (connection->request_role != HCI_ROLE_INVALID){ 6930 hci_role_t role = connection->request_role; 6931 connection->request_role = HCI_ROLE_INVALID; 6932 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6933 return true; 6934 } 6935 #endif 6936 6937 if (connection->gap_connection_tasks != 0){ 6938 #ifdef ENABLE_CLASSIC 6939 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6940 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6941 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6942 return true; 6943 } 6944 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6945 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6946 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6947 return true; 6948 } 6949 #endif 6950 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6951 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6952 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6953 return true; 6954 } 6955 #ifdef ENABLE_BLE 6956 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_LE_READ_REMOTE_FEATURES){ 6957 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_LE_READ_REMOTE_FEATURES; 6958 hci_send_cmd(&hci_le_read_remote_used_features, connection->con_handle); 6959 return true; 6960 } 6961 #endif 6962 } 6963 6964 #ifdef ENABLE_BLE 6965 switch (connection->le_con_parameter_update_state){ 6966 // response to L2CAP CON PARAMETER UPDATE REQUEST 6967 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6968 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6969 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6970 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6971 0x0000, 0xffff); 6972 return true; 6973 case CON_PARAMETER_UPDATE_REPLY: 6974 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6975 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6976 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6977 0x0000, 0xffff); 6978 return true; 6979 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6980 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6981 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6982 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6983 return true; 6984 default: 6985 break; 6986 } 6987 if (connection->le_phy_update_all_phys != 0xffu){ 6988 uint8_t all_phys = connection->le_phy_update_all_phys; 6989 connection->le_phy_update_all_phys = 0xff; 6990 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); 6991 return true; 6992 } 6993 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6994 if (connection->le_past_sync_handle != HCI_CON_HANDLE_INVALID){ 6995 hci_con_handle_t sync_handle = connection->le_past_sync_handle; 6996 connection->le_past_sync_handle = HCI_CON_HANDLE_INVALID; 6997 hci_send_cmd(&hci_le_periodic_advertising_sync_transfer, connection->con_handle, connection->le_past_service_data, sync_handle); 6998 return true; 6999 } 7000 #endif 7001 #endif 7002 } 7003 return false; 7004 } 7005 7006 static void hci_run(void){ 7007 7008 // stack state sub statemachines 7009 switch (hci_stack->state) { 7010 case HCI_STATE_INITIALIZING: 7011 hci_initializing_run(); 7012 break; 7013 case HCI_STATE_HALTING: 7014 hci_halting_run(); 7015 break; 7016 case HCI_STATE_FALLING_ASLEEP: 7017 hci_falling_asleep_run(); 7018 break; 7019 default: 7020 break; 7021 } 7022 7023 // allow to run after initialization to working transition 7024 if (hci_stack->state != HCI_STATE_WORKING){ 7025 return; 7026 } 7027 7028 bool done; 7029 7030 // send continuation fragments first, as they block the prepared packet buffer 7031 done = hci_run_acl_fragments(); 7032 if (done) return; 7033 7034 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7035 done = hci_run_iso_fragments(); 7036 if (done) return; 7037 #endif 7038 7039 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 7040 // send host num completed packets next as they don't require num_cmd_packets > 0 7041 if (!hci_can_send_comand_packet_transport()) return; 7042 if (hci_stack->host_completed_packets){ 7043 hci_host_num_completed_packets(); 7044 return; 7045 } 7046 #endif 7047 7048 if (!hci_can_send_command_packet_now()) return; 7049 7050 // global/non-connection oriented commands 7051 7052 7053 #ifdef ENABLE_CLASSIC 7054 // general gap classic 7055 done = hci_run_general_gap_classic(); 7056 if (done) return; 7057 #endif 7058 7059 #ifdef ENABLE_BLE 7060 // general gap le 7061 done = hci_run_general_gap_le(); 7062 if (done) return; 7063 7064 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7065 // ISO related tasks, e.g. BIG create/terminate/sync 7066 done = hci_run_iso_tasks(); 7067 if (done) return; 7068 #endif 7069 #endif 7070 7071 // send pending HCI commands 7072 hci_run_general_pending_commands(); 7073 } 7074 7075 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 7076 // house-keeping 7077 7078 #ifdef ENABLE_CLASSIC 7079 bd_addr_t addr; 7080 hci_connection_t * conn; 7081 #endif 7082 #ifdef ENABLE_LE_CENTRAL 7083 uint8_t initiator_filter_policy; 7084 #endif 7085 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7086 uint8_t i; 7087 uint8_t num_cis; 7088 hci_con_handle_t cis_handle; 7089 uint8_t status; 7090 #endif 7091 7092 uint16_t opcode = little_endian_read_16(packet, 0); 7093 switch (opcode) { 7094 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 7095 hci_stack->loopback_mode = packet[3]; 7096 break; 7097 7098 #ifdef ENABLE_CLASSIC 7099 case HCI_OPCODE_HCI_CREATE_CONNECTION: 7100 reverse_bd_addr(&packet[3], addr); 7101 log_info("Create_connection to %s", bd_addr_to_str(addr)); 7102 7103 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 7104 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 7105 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 7106 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 7107 } 7108 7109 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7110 if (!conn) { 7111 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7112 if (!conn) { 7113 // notify client that alloc failed 7114 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7115 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 7116 } 7117 conn->state = SEND_CREATE_CONNECTION; 7118 conn->role = HCI_ROLE_MASTER; 7119 } 7120 7121 log_info("conn state %u", conn->state); 7122 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 7123 switch (conn->state) { 7124 // if connection active exists 7125 case OPEN: 7126 // and OPEN, emit connection complete command 7127 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 7128 // packet not sent to controller 7129 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7130 case RECEIVED_DISCONNECTION_COMPLETE: 7131 // create connection triggered in disconnect complete event, let's do it now 7132 break; 7133 case SEND_CREATE_CONNECTION: 7134 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 7135 if (hci_classic_operation_active()){ 7136 return ERROR_CODE_SUCCESS; 7137 } 7138 #endif 7139 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 7140 break; 7141 default: 7142 // otherwise, just ignore as it is already in the open process 7143 // packet not sent to controller 7144 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7145 } 7146 conn->state = SENT_CREATE_CONNECTION; 7147 7148 // track outgoing connection 7149 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 7150 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 7151 break; 7152 7153 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 7154 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 7155 // setup_synchronous_connection? Voice setting at offset 22 7156 // TODO: compare to current setting if sco connection already active 7157 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 7158 break; 7159 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 7160 // accept_synchronous_connection? Voice setting at offset 18 7161 // TODO: compare to current setting if sco connection already active 7162 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 7163 // track outgoing connection 7164 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 7165 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 7166 break; 7167 #endif 7168 #endif 7169 7170 #ifdef ENABLE_BLE 7171 #ifdef ENABLE_LE_CENTRAL 7172 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 7173 // white list used? 7174 initiator_filter_policy = packet[7]; 7175 switch (initiator_filter_policy) { 7176 case 0: 7177 // whitelist not used 7178 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 7179 break; 7180 case 1: 7181 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 7182 break; 7183 default: 7184 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 7185 break; 7186 } 7187 // track outgoing connection 7188 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer address type 7189 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 7190 break; 7191 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7192 case HCI_OPCODE_HCI_LE_EXTENDED_CREATE_CONNECTION: 7193 // white list used? 7194 initiator_filter_policy = packet[3]; 7195 switch (initiator_filter_policy) { 7196 case 0: 7197 // whitelist not used 7198 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 7199 break; 7200 case 1: 7201 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 7202 break; 7203 default: 7204 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 7205 break; 7206 } 7207 // track outgoing connection 7208 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[5]; // peer address type 7209 reverse_bd_addr( &packet[6], hci_stack->outgoing_addr); // peer address 7210 break; 7211 #endif 7212 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 7213 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 7214 break; 7215 #endif 7216 #endif /* ENABLE_BLE */ 7217 default: 7218 break; 7219 } 7220 7221 hci_stack->num_cmd_packets--; 7222 7223 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 7224 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 7225 if (err != 0){ 7226 return ERROR_CODE_HARDWARE_FAILURE; 7227 } 7228 return ERROR_CODE_SUCCESS; 7229 } 7230 7231 // disconnect because of security block 7232 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 7233 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7234 if (!connection) return; 7235 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 7236 } 7237 7238 7239 // Configure Secure Simple Pairing 7240 7241 #ifdef ENABLE_CLASSIC 7242 7243 // enable will enable SSP during init 7244 void gap_ssp_set_enable(int enable){ 7245 hci_stack->ssp_enable = enable; 7246 } 7247 7248 static int hci_local_ssp_activated(void){ 7249 return gap_ssp_supported() && hci_stack->ssp_enable; 7250 } 7251 7252 // if set, BTstack will respond to io capability request using authentication requirement 7253 void gap_ssp_set_io_capability(int io_capability){ 7254 hci_stack->ssp_io_capability = io_capability; 7255 } 7256 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 7257 hci_stack->ssp_authentication_requirement = authentication_requirement; 7258 } 7259 7260 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 7261 void gap_ssp_set_auto_accept(int auto_accept){ 7262 hci_stack->ssp_auto_accept = auto_accept; 7263 } 7264 7265 void gap_secure_connections_enable(bool enable){ 7266 hci_stack->secure_connections_enable = enable; 7267 } 7268 bool gap_secure_connections_active(void){ 7269 return hci_stack->secure_connections_active; 7270 } 7271 7272 #endif 7273 7274 // va_list part of hci_send_cmd 7275 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 7276 if (!hci_can_send_command_packet_now()){ 7277 log_error("hci_send_cmd called but cannot send packet now"); 7278 return ERROR_CODE_COMMAND_DISALLOWED; 7279 } 7280 7281 // for HCI INITIALIZATION 7282 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 7283 hci_stack->last_cmd_opcode = cmd->opcode; 7284 7285 hci_reserve_packet_buffer(); 7286 uint8_t * packet = hci_stack->hci_packet_buffer; 7287 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 7288 uint8_t status = hci_send_cmd_packet(packet, size); 7289 7290 // release packet buffer on error or for synchronous transport implementations 7291 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 7292 hci_release_packet_buffer(); 7293 hci_emit_transport_packet_sent(); 7294 } 7295 7296 return status; 7297 } 7298 7299 /** 7300 * pre: numcmds >= 0 - it's allowed to send a command to the controller 7301 */ 7302 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 7303 va_list argptr; 7304 va_start(argptr, cmd); 7305 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 7306 va_end(argptr); 7307 return status; 7308 } 7309 7310 // Create various non-HCI events. 7311 // TODO: generalize, use table similar to hci_create_command 7312 7313 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 7314 // dump packet 7315 if (dump) { 7316 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 7317 } 7318 7319 // dispatch to all event handlers 7320 btstack_linked_list_iterator_t it; 7321 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 7322 while (btstack_linked_list_iterator_has_next(&it)){ 7323 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 7324 entry->callback(HCI_EVENT_PACKET, 0, event, size); 7325 } 7326 } 7327 7328 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 7329 if (!hci_stack->acl_packet_handler) return; 7330 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 7331 } 7332 7333 #ifdef ENABLE_CLASSIC 7334 static void hci_notify_if_sco_can_send_now(void){ 7335 // notify SCO sender if waiting 7336 if (!hci_stack->sco_waiting_for_can_send_now) return; 7337 if (hci_can_send_sco_packet_now()){ 7338 hci_stack->sco_waiting_for_can_send_now = 0; 7339 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 7340 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 7341 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 7342 } 7343 } 7344 7345 // parsing end emitting has been merged to reduce code size 7346 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 7347 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 7348 7349 uint8_t * eir_data; 7350 ad_context_t context; 7351 const uint8_t * name; 7352 uint8_t name_len; 7353 7354 if (size < 3) return; 7355 7356 int event_type = hci_event_packet_get_type(packet); 7357 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 7358 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 7359 7360 switch (event_type){ 7361 case HCI_EVENT_INQUIRY_RESULT: 7362 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7363 if (size != (3 + (num_responses * 14))) return; 7364 break; 7365 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7366 if (size != 257) return; 7367 if (num_responses != 1) return; 7368 break; 7369 default: 7370 return; 7371 } 7372 7373 // event[1] is set at the end 7374 int i; 7375 for (i=0; i<num_responses;i++){ 7376 memset(event, 0, sizeof(event)); 7377 event[0] = GAP_EVENT_INQUIRY_RESULT; 7378 uint8_t event_size = 27; // if name is not set by EIR 7379 7380 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 7381 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 7382 (void)memcpy(&event[9], 7383 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 7384 3); // class of device 7385 (void)memcpy(&event[12], 7386 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 7387 2); // clock offset 7388 7389 switch (event_type){ 7390 case HCI_EVENT_INQUIRY_RESULT: 7391 // 14,15,16,17 = 0, size 18 7392 break; 7393 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7394 event[14] = 1; 7395 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7396 // 16,17 = 0, size 18 7397 break; 7398 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7399 event[14] = 1; 7400 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7401 // EIR packets only contain a single inquiry response 7402 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 7403 name = NULL; 7404 // Iterate over EIR data 7405 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 7406 uint8_t data_type = ad_iterator_get_data_type(&context); 7407 uint8_t data_size = ad_iterator_get_data_len(&context); 7408 const uint8_t * data = ad_iterator_get_data(&context); 7409 // Prefer Complete Local Name over Shortened Local Name 7410 switch (data_type){ 7411 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 7412 if (name) continue; 7413 /* fall through */ 7414 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 7415 name = data; 7416 name_len = data_size; 7417 break; 7418 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 7419 if (data_size != 8) break; 7420 event[16] = 1; 7421 memcpy(&event[17], data, 8); 7422 break; 7423 default: 7424 break; 7425 } 7426 } 7427 if (name){ 7428 event[25] = 1; 7429 // truncate name if needed 7430 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 7431 event[26] = len; 7432 (void)memcpy(&event[27], name, len); 7433 event_size += len; 7434 } 7435 break; 7436 default: 7437 return; 7438 } 7439 event[1] = event_size - 2; 7440 hci_emit_event(event, event_size, 1); 7441 } 7442 } 7443 #endif 7444 7445 void hci_emit_state(void){ 7446 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 7447 uint8_t event[3]; 7448 event[0] = BTSTACK_EVENT_STATE; 7449 event[1] = sizeof(event) - 2u; 7450 event[2] = hci_stack->state; 7451 hci_emit_event(event, sizeof(event), 1); 7452 } 7453 7454 #ifdef ENABLE_CLASSIC 7455 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 7456 uint8_t event[13]; 7457 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 7458 event[1] = sizeof(event) - 2; 7459 event[2] = status; 7460 little_endian_store_16(event, 3, con_handle); 7461 reverse_bd_addr(address, &event[5]); 7462 event[11] = 1; // ACL connection 7463 event[12] = 0; // encryption disabled 7464 hci_emit_event(event, sizeof(event), 1); 7465 } 7466 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 7467 if (disable_l2cap_timeouts) return; 7468 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 7469 uint8_t event[4]; 7470 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 7471 event[1] = sizeof(event) - 2; 7472 little_endian_store_16(event, 2, conn->con_handle); 7473 hci_emit_event(event, sizeof(event), 1); 7474 } 7475 #endif 7476 7477 #ifdef ENABLE_BLE 7478 #ifdef ENABLE_LE_CENTRAL 7479 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){ 7480 uint8_t event[21]; 7481 event[0] = HCI_EVENT_LE_META; 7482 event[1] = sizeof(event) - 2u; 7483 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 7484 event[3] = status; 7485 little_endian_store_16(event, 4, con_handle); 7486 event[6] = 0; // TODO: role 7487 event[7] = address_type; 7488 reverse_bd_addr(address, &event[8]); 7489 little_endian_store_16(event, 14, 0); // interval 7490 little_endian_store_16(event, 16, 0); // latency 7491 little_endian_store_16(event, 18, 0); // supervision timeout 7492 event[20] = 0; // master clock accuracy 7493 hci_emit_event(event, sizeof(event), 1); 7494 } 7495 #endif 7496 #endif 7497 7498 static void hci_emit_transport_packet_sent(void){ 7499 // notify upper stack that it might be possible to send again 7500 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 7501 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 7502 } 7503 7504 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 7505 uint8_t event[6]; 7506 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 7507 event[1] = sizeof(event) - 2u; 7508 event[2] = 0; // status = OK 7509 little_endian_store_16(event, 3, con_handle); 7510 event[5] = reason; 7511 hci_emit_event(event, sizeof(event), 1); 7512 } 7513 7514 static void hci_emit_nr_connections_changed(void){ 7515 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 7516 uint8_t event[3]; 7517 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 7518 event[1] = sizeof(event) - 2u; 7519 event[2] = nr_hci_connections(); 7520 hci_emit_event(event, sizeof(event), 1); 7521 } 7522 7523 static void hci_emit_hci_open_failed(void){ 7524 log_info("BTSTACK_EVENT_POWERON_FAILED"); 7525 uint8_t event[2]; 7526 event[0] = BTSTACK_EVENT_POWERON_FAILED; 7527 event[1] = sizeof(event) - 2u; 7528 hci_emit_event(event, sizeof(event), 1); 7529 } 7530 7531 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 7532 log_info("hci_emit_dedicated_bonding_result %u ", status); 7533 uint8_t event[9]; 7534 int pos = 0; 7535 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 7536 event[pos++] = sizeof(event) - 2u; 7537 event[pos++] = status; 7538 reverse_bd_addr(address, &event[pos]); 7539 hci_emit_event(event, sizeof(event), 1); 7540 } 7541 7542 7543 #ifdef ENABLE_CLASSIC 7544 7545 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 7546 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 7547 uint8_t event[5]; 7548 int pos = 0; 7549 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 7550 event[pos++] = sizeof(event) - 2; 7551 little_endian_store_16(event, 2, con_handle); 7552 pos += 2; 7553 event[pos++] = level; 7554 hci_emit_event(event, sizeof(event), 1); 7555 } 7556 7557 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 7558 if (!connection) return LEVEL_0; 7559 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 7560 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 7561 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 7562 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 7563 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 7564 // LEVEL 4 always requires 128 bit encrytion key size 7565 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 7566 security_level = LEVEL_3; 7567 } 7568 return security_level; 7569 } 7570 7571 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable){ 7572 uint8_t event[4]; 7573 event[0] = BTSTACK_EVENT_SCAN_MODE_CHANGED; 7574 event[1] = sizeof(event) - 2; 7575 event[2] = discoverable; 7576 event[3] = connectable; 7577 hci_emit_event(event, sizeof(event), 1); 7578 } 7579 7580 // query if remote side supports eSCO 7581 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 7582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7583 if (!connection) return false; 7584 return (connection->remote_supported_features[0] & 1) != 0; 7585 } 7586 7587 static bool hci_ssp_supported(hci_connection_t * connection){ 7588 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 7589 return (connection->bonding_flags & mask) == mask; 7590 } 7591 7592 // query if remote side supports SSP 7593 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 7594 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7595 if (!connection) return false; 7596 return hci_ssp_supported(connection) ? 1 : 0; 7597 } 7598 7599 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 7600 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 7601 } 7602 7603 /** 7604 * Check if remote supported features query has completed 7605 */ 7606 bool hci_remote_features_available(hci_con_handle_t handle){ 7607 hci_connection_t * connection = hci_connection_for_handle(handle); 7608 if (!connection) return false; 7609 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 7610 } 7611 7612 /** 7613 * Trigger remote supported features query 7614 */ 7615 7616 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 7617 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 7618 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 7619 } 7620 } 7621 7622 void hci_remote_features_query(hci_con_handle_t con_handle){ 7623 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7624 if (!connection) return; 7625 hci_trigger_remote_features_for_connection(connection); 7626 hci_run(); 7627 } 7628 7629 // GAP API 7630 /** 7631 * @bbrief enable/disable bonding. default is enabled 7632 * @praram enabled 7633 */ 7634 void gap_set_bondable_mode(int enable){ 7635 hci_stack->bondable = enable ? 1 : 0; 7636 } 7637 /** 7638 * @brief Get bondable mode. 7639 * @return 1 if bondable 7640 */ 7641 int gap_get_bondable_mode(void){ 7642 return hci_stack->bondable; 7643 } 7644 7645 /** 7646 * @brief map link keys to security levels 7647 */ 7648 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 7649 switch (link_key_type){ 7650 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7651 return LEVEL_4; 7652 case COMBINATION_KEY: 7653 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7654 return LEVEL_3; 7655 default: 7656 return LEVEL_2; 7657 } 7658 } 7659 7660 /** 7661 * @brief map link keys to secure connection yes/no 7662 */ 7663 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 7664 switch (link_key_type){ 7665 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7666 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7667 return true; 7668 default: 7669 return false; 7670 } 7671 } 7672 7673 /** 7674 * @brief map link keys to authenticated 7675 */ 7676 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 7677 switch (link_key_type){ 7678 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7679 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7680 return true; 7681 default: 7682 return false; 7683 } 7684 } 7685 7686 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 7687 log_info("gap_mitm_protection_required_for_security_level %u", level); 7688 return level > LEVEL_2; 7689 } 7690 7691 /** 7692 * @brief get current security level 7693 */ 7694 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 7695 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7696 if (!connection) return LEVEL_0; 7697 return gap_security_level_for_connection(connection); 7698 } 7699 7700 /** 7701 * @brief request connection to device to 7702 * @result GAP_AUTHENTICATION_RESULT 7703 */ 7704 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 7705 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7706 if (!connection){ 7707 hci_emit_security_level(con_handle, LEVEL_0); 7708 return; 7709 } 7710 7711 btstack_assert(hci_is_le_connection(connection) == false); 7712 7713 // 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) 7714 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 7715 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 7716 requested_level = LEVEL_4; 7717 } 7718 7719 gap_security_level_t current_level = gap_security_level(con_handle); 7720 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 7721 requested_level, connection->requested_security_level, current_level); 7722 7723 // authentication active if authentication request was sent or planned level > 0 7724 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 7725 if (authentication_active){ 7726 // authentication already active 7727 if (connection->requested_security_level < requested_level){ 7728 // increase requested level as new level is higher 7729 // TODO: handle re-authentication when done 7730 connection->requested_security_level = requested_level; 7731 } 7732 } else { 7733 // no request active, notify if security sufficient 7734 if (requested_level <= current_level){ 7735 hci_emit_security_level(con_handle, current_level); 7736 return; 7737 } 7738 7739 // store request 7740 connection->requested_security_level = requested_level; 7741 7742 // start to authenticate connection 7743 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 7744 7745 // request remote features if not already active, also trigger hci_run 7746 hci_remote_features_query(con_handle); 7747 } 7748 } 7749 7750 /** 7751 * @brief start dedicated bonding with device. disconnect after bonding 7752 * @param device 7753 * @param request MITM protection 7754 * @result GAP_DEDICATED_BONDING_COMPLETE 7755 */ 7756 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 7757 7758 // create connection state machine 7759 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 7760 7761 if (!connection){ 7762 return BTSTACK_MEMORY_ALLOC_FAILED; 7763 } 7764 7765 // delete linkn key 7766 gap_drop_link_key_for_bd_addr(device); 7767 7768 // configure LEVEL_2/3, dedicated bonding 7769 connection->state = SEND_CREATE_CONNECTION; 7770 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 7771 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 7772 connection->bonding_flags = BONDING_DEDICATED; 7773 7774 // wait for GAP Security Result and send GAP Dedicated Bonding complete 7775 7776 // handle: connnection failure (connection complete != ok) 7777 // handle: authentication failure 7778 // handle: disconnect on done 7779 7780 hci_run(); 7781 7782 return 0; 7783 } 7784 7785 void gap_set_local_name(const char * local_name){ 7786 hci_stack->local_name = local_name; 7787 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7788 // also update EIR if not set by user 7789 if (hci_stack->eir_data == NULL){ 7790 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7791 } 7792 hci_run(); 7793 } 7794 #endif 7795 7796 7797 #ifdef ENABLE_BLE 7798 7799 #ifdef ENABLE_LE_CENTRAL 7800 void gap_start_scan(void){ 7801 hci_stack->le_scanning_enabled = true; 7802 hci_run(); 7803 } 7804 7805 void gap_stop_scan(void){ 7806 hci_stack->le_scanning_enabled = false; 7807 hci_run(); 7808 } 7809 7810 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7811 hci_stack->le_scan_type = scan_type; 7812 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7813 hci_stack->le_scan_interval = scan_interval; 7814 hci_stack->le_scan_window = scan_window; 7815 hci_stack->le_scanning_param_update = true; 7816 hci_run(); 7817 } 7818 7819 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7820 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7821 } 7822 7823 void gap_set_scan_duplicate_filter(bool enabled){ 7824 hci_stack->le_scan_filter_duplicates = enabled ? 1 : 0; 7825 } 7826 7827 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7828 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7829 if (!conn){ 7830 // disallow if le connection is already outgoing 7831 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7832 log_error("le connection already active"); 7833 return ERROR_CODE_COMMAND_DISALLOWED; 7834 } 7835 7836 log_info("gap_connect: no connection exists yet, creating context"); 7837 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7838 if (!conn){ 7839 // notify client that alloc failed 7840 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7841 log_info("gap_connect: failed to alloc hci_connection_t"); 7842 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7843 } 7844 7845 // set le connecting state 7846 if (hci_is_le_connection_type(addr_type)){ 7847 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7848 } 7849 7850 conn->state = SEND_CREATE_CONNECTION; 7851 log_info("gap_connect: send create connection next"); 7852 hci_run(); 7853 return ERROR_CODE_SUCCESS; 7854 } 7855 7856 if (!hci_is_le_connection(conn) || 7857 (conn->state == SEND_CREATE_CONNECTION) || 7858 (conn->state == SENT_CREATE_CONNECTION)) { 7859 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7860 log_error("gap_connect: classic connection or connect is already being created"); 7861 return GATT_CLIENT_IN_WRONG_STATE; 7862 } 7863 7864 // check if connection was just disconnected 7865 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7866 log_info("gap_connect: send create connection (again)"); 7867 conn->state = SEND_CREATE_CONNECTION; 7868 hci_run(); 7869 return ERROR_CODE_SUCCESS; 7870 } 7871 7872 log_info("gap_connect: context exists with state %u", conn->state); 7873 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7874 hci_run(); 7875 return ERROR_CODE_SUCCESS; 7876 } 7877 7878 // @assumption: only a single outgoing LE Connection exists 7879 static hci_connection_t * gap_get_outgoing_connection(void){ 7880 btstack_linked_item_t *it; 7881 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7882 hci_connection_t * conn = (hci_connection_t *) it; 7883 if (!hci_is_le_connection(conn)) continue; 7884 switch (conn->state){ 7885 case SEND_CREATE_CONNECTION: 7886 case SENT_CREATE_CONNECTION: 7887 return conn; 7888 default: 7889 break; 7890 }; 7891 } 7892 return NULL; 7893 } 7894 7895 uint8_t gap_connect_cancel(void){ 7896 hci_connection_t * conn; 7897 switch (hci_stack->le_connecting_request){ 7898 case LE_CONNECTING_IDLE: 7899 break; 7900 case LE_CONNECTING_WHITELIST: 7901 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7902 hci_run(); 7903 break; 7904 case LE_CONNECTING_DIRECT: 7905 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7906 conn = gap_get_outgoing_connection(); 7907 if (conn == NULL){ 7908 hci_run(); 7909 } else { 7910 switch (conn->state){ 7911 case SEND_CREATE_CONNECTION: 7912 // skip sending create connection and emit event instead 7913 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7914 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7915 btstack_memory_hci_connection_free( conn ); 7916 break; 7917 case SENT_CREATE_CONNECTION: 7918 // let hci_run_general_gap_le cancel outgoing connection 7919 hci_run(); 7920 break; 7921 default: 7922 break; 7923 } 7924 } 7925 break; 7926 default: 7927 btstack_unreachable(); 7928 break; 7929 } 7930 return ERROR_CODE_SUCCESS; 7931 } 7932 7933 /** 7934 * @brief Set connection parameters for outgoing connections 7935 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7936 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7937 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7938 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7939 * @param conn_latency, default: 4 7940 * @param supervision_timeout (unit: 10ms), default: 720 ms 7941 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7942 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7943 */ 7944 7945 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7946 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7947 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7948 hci_stack->le_connection_scan_interval = conn_scan_interval; 7949 hci_stack->le_connection_scan_window = conn_scan_window; 7950 hci_stack->le_connection_interval_min = conn_interval_min; 7951 hci_stack->le_connection_interval_max = conn_interval_max; 7952 hci_stack->le_connection_latency = conn_latency; 7953 hci_stack->le_supervision_timeout = supervision_timeout; 7954 hci_stack->le_minimum_ce_length = min_ce_length; 7955 hci_stack->le_maximum_ce_length = max_ce_length; 7956 } 7957 #endif 7958 7959 /** 7960 * @brief Updates the connection parameters for a given LE connection 7961 * @param handle 7962 * @param conn_interval_min (unit: 1.25ms) 7963 * @param conn_interval_max (unit: 1.25ms) 7964 * @param conn_latency 7965 * @param supervision_timeout (unit: 10ms) 7966 * @return 0 if ok 7967 */ 7968 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7969 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7970 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7971 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7972 connection->le_conn_interval_min = conn_interval_min; 7973 connection->le_conn_interval_max = conn_interval_max; 7974 connection->le_conn_latency = conn_latency; 7975 connection->le_supervision_timeout = supervision_timeout; 7976 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7977 hci_run(); 7978 return 0; 7979 } 7980 7981 /** 7982 * @brief Request an update of the connection parameter for a given LE connection 7983 * @param handle 7984 * @param conn_interval_min (unit: 1.25ms) 7985 * @param conn_interval_max (unit: 1.25ms) 7986 * @param conn_latency 7987 * @param supervision_timeout (unit: 10ms) 7988 * @return 0 if ok 7989 */ 7990 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7991 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7992 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7993 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7994 connection->le_conn_interval_min = conn_interval_min; 7995 connection->le_conn_interval_max = conn_interval_max; 7996 connection->le_conn_latency = conn_latency; 7997 connection->le_supervision_timeout = supervision_timeout; 7998 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7999 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 8000 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 8001 return 0; 8002 } 8003 8004 #ifdef ENABLE_LE_PERIPHERAL 8005 8006 /** 8007 * @brief Set Advertisement Data 8008 * @param advertising_data_length 8009 * @param advertising_data (max 31 octets) 8010 * @note data is not copied, pointer has to stay valid 8011 */ 8012 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 8013 hci_stack->le_advertisements_data_len = advertising_data_length; 8014 hci_stack->le_advertisements_data = advertising_data; 8015 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 8016 hci_run(); 8017 } 8018 8019 /** 8020 * @brief Set Scan Response Data 8021 * @param advertising_data_length 8022 * @param advertising_data (max 31 octets) 8023 * @note data is not copied, pointer has to stay valid 8024 */ 8025 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 8026 hci_stack->le_scan_response_data_len = scan_response_data_length; 8027 hci_stack->le_scan_response_data = scan_response_data; 8028 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 8029 hci_run(); 8030 } 8031 8032 /** 8033 * @brief Set Advertisement Parameters 8034 * @param adv_int_min 8035 * @param adv_int_max 8036 * @param adv_type 8037 * @param direct_address_type 8038 * @param direct_address 8039 * @param channel_map 8040 * @param filter_policy 8041 * 8042 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 8043 */ 8044 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 8045 uint8_t direct_address_typ, bd_addr_t direct_address, 8046 uint8_t channel_map, uint8_t filter_policy) { 8047 8048 hci_stack->le_advertisements_interval_min = adv_int_min; 8049 hci_stack->le_advertisements_interval_max = adv_int_max; 8050 hci_stack->le_advertisements_type = adv_type; 8051 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 8052 hci_stack->le_advertisements_channel_map = channel_map; 8053 hci_stack->le_advertisements_filter_policy = filter_policy; 8054 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 8055 6); 8056 8057 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8058 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 8059 hci_run(); 8060 } 8061 8062 /** 8063 * @brief Enable/Disable Advertisements 8064 * @param enabled 8065 */ 8066 void gap_advertisements_enable(int enabled){ 8067 if (enabled == 0){ 8068 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 8069 } else { 8070 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 8071 } 8072 hci_update_advertisements_enabled_for_current_roles(); 8073 hci_run(); 8074 } 8075 8076 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8077 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 8078 btstack_linked_list_iterator_t it; 8079 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 8080 while (btstack_linked_list_iterator_has_next(&it)){ 8081 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 8082 if ( item->advertising_handle == advertising_handle ) { 8083 return item; 8084 } 8085 } 8086 return NULL; 8087 } 8088 8089 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 8090 // find free advertisement handle 8091 uint8_t advertisement_handle; 8092 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 8093 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 8094 } 8095 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8096 // clear 8097 memset(storage, 0, sizeof(le_advertising_set_t)); 8098 // copy params 8099 storage->advertising_handle = advertisement_handle; 8100 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 8101 // add to list 8102 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 8103 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 8104 *out_advertising_handle = advertisement_handle; 8105 // set tasks and start 8106 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8107 hci_run(); 8108 return ERROR_CODE_SUCCESS; 8109 } 8110 8111 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 8112 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8113 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8114 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 8115 // set tasks and start 8116 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8117 hci_run(); 8118 return ERROR_CODE_SUCCESS; 8119 } 8120 8121 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 8122 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8123 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8124 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 8125 return ERROR_CODE_SUCCESS; 8126 } 8127 8128 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 8129 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8130 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8131 memcpy(advertising_set->random_address, random_address, 6); 8132 // set tasks and start 8133 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 8134 hci_run(); 8135 return ERROR_CODE_SUCCESS; 8136 } 8137 8138 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_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->adv_data = advertising_data; 8142 advertising_set->adv_data_len = advertising_data_length; 8143 // set tasks and start 8144 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 8145 hci_run(); 8146 return ERROR_CODE_SUCCESS; 8147 } 8148 8149 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){ 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 advertising_set->scan_data = scan_response_data; 8153 advertising_set->scan_data_len = scan_response_data_length; 8154 // set tasks and start 8155 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 8156 hci_run(); 8157 return ERROR_CODE_SUCCESS; 8158 } 8159 8160 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 8161 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8162 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8163 advertising_set->enable_timeout = timeout; 8164 advertising_set->enable_max_scan_events = num_extended_advertising_events; 8165 // set tasks and start 8166 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 8167 hci_run(); 8168 return ERROR_CODE_SUCCESS; 8169 } 8170 8171 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 8172 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8173 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8174 // set tasks and start 8175 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 8176 hci_run(); 8177 return ERROR_CODE_SUCCESS; 8178 } 8179 8180 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 8181 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8182 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8183 // set tasks and start 8184 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 8185 hci_run(); 8186 return ERROR_CODE_SUCCESS; 8187 } 8188 8189 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 8190 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 8191 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8192 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8193 // periodic advertising requires neither connectable, scannable, legacy or anonymous 8194 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8195 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 8196 // set tasks and start 8197 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 8198 hci_run(); 8199 return ERROR_CODE_SUCCESS; 8200 } 8201 8202 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 8203 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8204 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8205 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 8206 return ERROR_CODE_SUCCESS; 8207 } 8208 8209 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 8210 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8211 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8212 advertising_set->periodic_data = periodic_data; 8213 advertising_set->periodic_data_len = periodic_data_length; 8214 // set tasks and start 8215 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 8216 hci_run(); 8217 return ERROR_CODE_SUCCESS; 8218 } 8219 8220 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 8221 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8222 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8223 // set tasks and start 8224 advertising_set->periodic_include_adi = include_adi; 8225 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 8226 hci_run(); 8227 return ERROR_CODE_SUCCESS; 8228 } 8229 8230 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 8231 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8232 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8233 // set tasks and start 8234 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 8235 hci_run(); 8236 return ERROR_CODE_SUCCESS; 8237 } 8238 8239 uint8_t gap_periodic_advertising_sync_transfer_set_default_parameters(uint8_t mode, uint16_t skip, uint16_t sync_timeout, uint8_t cte_type){ 8240 hci_stack->le_past_mode = mode; 8241 hci_stack->le_past_skip = skip; 8242 hci_stack->le_past_sync_timeout = sync_timeout; 8243 hci_stack->le_past_cte_type = cte_type; 8244 hci_stack->le_past_set_default_params = true; 8245 hci_run(); 8246 return ERROR_CODE_SUCCESS; 8247 } 8248 8249 uint8_t gap_periodic_advertising_sync_transfer_send(hci_con_handle_t con_handle, uint16_t service_data, hci_con_handle_t sync_handle){ 8250 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8251 if (hci_connection == NULL){ 8252 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8253 } 8254 hci_connection->le_past_sync_handle = sync_handle; 8255 hci_connection->le_past_service_data = service_data; 8256 hci_run(); 8257 return ERROR_CODE_SUCCESS; 8258 } 8259 8260 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 8261 8262 #endif 8263 8264 #endif 8265 8266 void hci_le_set_own_address_type(uint8_t own_address_type){ 8267 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 8268 if (own_address_type == hci_stack->le_own_addr_type) return; 8269 hci_stack->le_own_addr_type = own_address_type; 8270 8271 #ifdef ENABLE_LE_PERIPHERAL 8272 // update advertisement parameters, too 8273 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8274 hci_run(); 8275 #endif 8276 #ifdef ENABLE_LE_CENTRAL 8277 // note: we don't update scan parameters or modify ongoing connection attempts 8278 #endif 8279 } 8280 8281 void hci_le_random_address_set(const bd_addr_t random_address){ 8282 memcpy(hci_stack->le_random_address, random_address, 6); 8283 hci_stack->le_random_address_set = true; 8284 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 8285 hci_run(); 8286 } 8287 8288 #endif 8289 8290 uint8_t gap_disconnect(hci_con_handle_t handle){ 8291 hci_connection_t * conn = hci_connection_for_handle(handle); 8292 if (!conn){ 8293 hci_emit_disconnection_complete(handle, 0); 8294 return 0; 8295 } 8296 // ignore if already disconnected 8297 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 8298 return 0; 8299 } 8300 conn->state = SEND_DISCONNECT; 8301 hci_run(); 8302 return 0; 8303 } 8304 8305 int gap_read_rssi(hci_con_handle_t con_handle){ 8306 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8307 if (hci_connection == NULL) return 0; 8308 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 8309 hci_run(); 8310 return 1; 8311 } 8312 8313 /** 8314 * @brief Get connection type 8315 * @param con_handle 8316 * @result connection_type 8317 */ 8318 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 8319 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 8320 if (!conn) return GAP_CONNECTION_INVALID; 8321 switch (conn->address_type){ 8322 case BD_ADDR_TYPE_LE_PUBLIC: 8323 case BD_ADDR_TYPE_LE_RANDOM: 8324 return GAP_CONNECTION_LE; 8325 case BD_ADDR_TYPE_SCO: 8326 return GAP_CONNECTION_SCO; 8327 case BD_ADDR_TYPE_ACL: 8328 return GAP_CONNECTION_ACL; 8329 default: 8330 return GAP_CONNECTION_INVALID; 8331 } 8332 } 8333 8334 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 8335 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 8336 if (!conn) return HCI_ROLE_INVALID; 8337 return (hci_role_t) conn->role; 8338 } 8339 8340 8341 #ifdef ENABLE_CLASSIC 8342 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 8343 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8344 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8345 conn->request_role = role; 8346 hci_run(); 8347 return ERROR_CODE_SUCCESS; 8348 } 8349 #endif 8350 8351 #ifdef ENABLE_BLE 8352 8353 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){ 8354 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8355 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8356 8357 conn->le_phy_update_all_phys = all_phys; 8358 conn->le_phy_update_tx_phys = tx_phys; 8359 conn->le_phy_update_rx_phys = rx_phys; 8360 conn->le_phy_update_phy_options = phy_options; 8361 8362 hci_run(); 8363 8364 return 0; 8365 } 8366 8367 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8368 // check if already in list 8369 btstack_linked_list_iterator_t it; 8370 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8371 while (btstack_linked_list_iterator_has_next(&it)) { 8372 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 8373 if (entry->address_type != address_type) { 8374 continue; 8375 } 8376 if (memcmp(entry->address, address, 6) != 0) { 8377 continue; 8378 } 8379 // disallow if already scheduled to add 8380 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 8381 return ERROR_CODE_COMMAND_DISALLOWED; 8382 } 8383 // still on controller, but scheduled to remove -> re-add 8384 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 8385 return ERROR_CODE_SUCCESS; 8386 } 8387 // alloc and add to list 8388 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 8389 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8390 entry->address_type = address_type; 8391 (void)memcpy(entry->address, address, 6); 8392 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 8393 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 8394 return ERROR_CODE_SUCCESS; 8395 } 8396 8397 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8398 btstack_linked_list_iterator_t it; 8399 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8400 while (btstack_linked_list_iterator_has_next(&it)){ 8401 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8402 if (entry->address_type != address_type) { 8403 continue; 8404 } 8405 if (memcmp(entry->address, address, 6) != 0) { 8406 continue; 8407 } 8408 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8409 // remove from controller if already present 8410 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8411 } else { 8412 // directly remove entry from whitelist 8413 btstack_linked_list_iterator_remove(&it); 8414 btstack_memory_whitelist_entry_free(entry); 8415 } 8416 return ERROR_CODE_SUCCESS; 8417 } 8418 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8419 } 8420 8421 static void hci_whitelist_clear(void){ 8422 btstack_linked_list_iterator_t it; 8423 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8424 while (btstack_linked_list_iterator_has_next(&it)){ 8425 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8426 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8427 // remove from controller if already present 8428 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8429 continue; 8430 } 8431 // directly remove entry from whitelist 8432 btstack_linked_list_iterator_remove(&it); 8433 btstack_memory_whitelist_entry_free(entry); 8434 } 8435 } 8436 8437 /** 8438 * @brief Clear Whitelist 8439 * @return 0 if ok 8440 */ 8441 uint8_t gap_whitelist_clear(void){ 8442 hci_whitelist_clear(); 8443 hci_run(); 8444 return ERROR_CODE_SUCCESS; 8445 } 8446 8447 /** 8448 * @brief Add Device to Whitelist 8449 * @param address_typ 8450 * @param address 8451 * @return 0 if ok 8452 */ 8453 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8454 uint8_t status = hci_whitelist_add(address_type, address); 8455 if (status){ 8456 return status; 8457 } 8458 hci_run(); 8459 return ERROR_CODE_SUCCESS; 8460 } 8461 8462 /** 8463 * @brief Remove Device from Whitelist 8464 * @param address_typ 8465 * @param address 8466 * @return 0 if ok 8467 */ 8468 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8469 uint8_t status = hci_whitelist_remove(address_type, address); 8470 if (status){ 8471 return status; 8472 } 8473 hci_run(); 8474 return ERROR_CODE_SUCCESS; 8475 } 8476 8477 #ifdef ENABLE_LE_CENTRAL 8478 /** 8479 * @brief Connect with Whitelist 8480 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 8481 * @return - if ok 8482 */ 8483 uint8_t gap_connect_with_whitelist(void){ 8484 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 8485 return ERROR_CODE_COMMAND_DISALLOWED; 8486 } 8487 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8488 hci_run(); 8489 return ERROR_CODE_SUCCESS; 8490 } 8491 8492 /** 8493 * @brief Auto Connection Establishment - Start Connecting to device 8494 * @param address_typ 8495 * @param address 8496 * @return 0 if ok 8497 */ 8498 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 8499 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8500 return ERROR_CODE_COMMAND_DISALLOWED; 8501 } 8502 8503 uint8_t status = hci_whitelist_add(address_type, address); 8504 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 8505 return status; 8506 } 8507 8508 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8509 8510 hci_run(); 8511 return ERROR_CODE_SUCCESS; 8512 } 8513 8514 /** 8515 * @brief Auto Connection Establishment - Stop Connecting to device 8516 * @param address_typ 8517 * @param address 8518 * @return 0 if ok 8519 */ 8520 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 8521 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8522 return ERROR_CODE_COMMAND_DISALLOWED; 8523 } 8524 8525 hci_whitelist_remove(address_type, address); 8526 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 8527 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8528 } 8529 hci_run(); 8530 return 0; 8531 } 8532 8533 /** 8534 * @brief Auto Connection Establishment - Stop everything 8535 * @note Convenience function to stop all active auto connection attempts 8536 */ 8537 uint8_t gap_auto_connection_stop_all(void){ 8538 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 8539 return ERROR_CODE_COMMAND_DISALLOWED; 8540 } 8541 hci_whitelist_clear(); 8542 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8543 hci_run(); 8544 return ERROR_CODE_SUCCESS; 8545 } 8546 8547 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 8548 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8549 if (!conn) return 0; 8550 return conn->le_connection_interval; 8551 } 8552 #endif 8553 #endif 8554 8555 #ifdef ENABLE_CLASSIC 8556 /** 8557 * @brief Set Extended Inquiry Response data 8558 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 8559 * @note has to be done before stack starts up 8560 */ 8561 void gap_set_extended_inquiry_response(const uint8_t * data){ 8562 hci_stack->eir_data = data; 8563 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 8564 hci_run(); 8565 } 8566 8567 /** 8568 * @brief Start GAP Classic Inquiry 8569 * @param duration in 1.28s units 8570 * @return 0 if ok 8571 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 8572 */ 8573 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 8574 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8575 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8576 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 8577 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8578 } 8579 hci_stack->inquiry_state = duration_in_1280ms_units; 8580 hci_stack->inquiry_max_period_length = 0; 8581 hci_stack->inquiry_min_period_length = 0; 8582 hci_run(); 8583 return 0; 8584 } 8585 8586 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 8587 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8588 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8589 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8590 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8591 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8592 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8593 8594 hci_stack->inquiry_state = duration; 8595 hci_stack->inquiry_max_period_length = max_period_length; 8596 hci_stack->inquiry_min_period_length = min_period_length; 8597 hci_run(); 8598 return 0; 8599 } 8600 8601 /** 8602 * @brief Stop GAP Classic Inquiry 8603 * @return 0 if ok 8604 */ 8605 int gap_inquiry_stop(void){ 8606 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 8607 // emit inquiry complete event, before it even started 8608 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 8609 hci_emit_event(event, sizeof(event), 1); 8610 return 0; 8611 } 8612 switch (hci_stack->inquiry_state){ 8613 case GAP_INQUIRY_STATE_ACTIVE: 8614 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 8615 hci_run(); 8616 return ERROR_CODE_SUCCESS; 8617 case GAP_INQUIRY_STATE_PERIODIC: 8618 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 8619 hci_run(); 8620 return ERROR_CODE_SUCCESS; 8621 default: 8622 return ERROR_CODE_COMMAND_DISALLOWED; 8623 } 8624 } 8625 8626 void gap_inquiry_set_lap(uint32_t lap){ 8627 hci_stack->inquiry_lap = lap; 8628 } 8629 8630 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 8631 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 8632 hci_stack->inquiry_scan_window = inquiry_scan_window; 8633 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 8634 hci_run(); 8635 } 8636 8637 8638 /** 8639 * @brief Remote Name Request 8640 * @param addr 8641 * @param page_scan_repetition_mode 8642 * @param clock_offset only used when bit 15 is set 8643 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 8644 */ 8645 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 8646 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8647 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 8648 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 8649 hci_stack->remote_name_clock_offset = clock_offset; 8650 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 8651 hci_run(); 8652 return 0; 8653 } 8654 8655 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 8656 hci_stack->gap_pairing_state = state; 8657 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 8658 hci_run(); 8659 return 0; 8660 } 8661 8662 /** 8663 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 8664 * @param addr 8665 * @param pin_data 8666 * @param pin_len 8667 * @return 0 if ok 8668 */ 8669 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 8670 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8671 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 8672 hci_stack->gap_pairing_pin_len = pin_len; 8673 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 8674 } 8675 8676 /** 8677 * @brief Legacy Pairing Pin Code Response 8678 * @param addr 8679 * @param pin 8680 * @return 0 if ok 8681 */ 8682 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 8683 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, (uint8_t) strlen(pin)); 8684 } 8685 8686 /** 8687 * @brief Abort Legacy Pairing 8688 * @param addr 8689 * @param pin 8690 * @return 0 if ok 8691 */ 8692 int gap_pin_code_negative(bd_addr_t addr){ 8693 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8694 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 8695 } 8696 8697 /** 8698 * @brief SSP Passkey Response 8699 * @param addr 8700 * @param passkey 8701 * @return 0 if ok 8702 */ 8703 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 8704 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8705 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 8706 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 8707 } 8708 8709 /** 8710 * @brief Abort SSP Passkey Entry/Pairing 8711 * @param addr 8712 * @param pin 8713 * @return 0 if ok 8714 */ 8715 int gap_ssp_passkey_negative(const bd_addr_t addr){ 8716 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8717 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 8718 } 8719 8720 /** 8721 * @brief Accept SSP Numeric Comparison 8722 * @param addr 8723 * @param passkey 8724 * @return 0 if ok 8725 */ 8726 int gap_ssp_confirmation_response(const bd_addr_t addr){ 8727 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8728 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 8729 } 8730 8731 /** 8732 * @brief Abort SSP Numeric Comparison/Pairing 8733 * @param addr 8734 * @param pin 8735 * @return 0 if ok 8736 */ 8737 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 8738 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8739 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 8740 } 8741 8742 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 8743 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 8744 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8745 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8746 connectionSetAuthenticationFlags(conn, flag); 8747 hci_run(); 8748 return ERROR_CODE_SUCCESS; 8749 } 8750 #endif 8751 8752 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 8753 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 8754 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 8755 } 8756 8757 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 8758 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 8759 } 8760 #endif 8761 8762 #ifdef ENABLE_CLASSIC_PAIRING_OOB 8763 /** 8764 * @brief Report Remote OOB Data 8765 * @param bd_addr 8766 * @param c_192 Simple Pairing Hash C derived from P-192 public key 8767 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 8768 * @param c_256 Simple Pairing Hash C derived from P-256 public key 8769 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 8770 */ 8771 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){ 8772 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8773 if (connection == NULL) { 8774 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8775 } 8776 connection->classic_oob_c_192 = c_192; 8777 connection->classic_oob_r_192 = r_192; 8778 8779 // ignore P-256 if not supported by us 8780 if (hci_stack->secure_connections_active){ 8781 connection->classic_oob_c_256 = c_256; 8782 connection->classic_oob_r_256 = r_256; 8783 } 8784 8785 return ERROR_CODE_SUCCESS; 8786 } 8787 /** 8788 * @brief Generate new OOB data 8789 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 8790 */ 8791 void gap_ssp_generate_oob_data(void){ 8792 hci_stack->classic_read_local_oob_data = true; 8793 hci_run(); 8794 } 8795 8796 #endif 8797 8798 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 8799 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 8800 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8801 if (connection == NULL) { 8802 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8803 } 8804 8805 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 8806 connection->link_key_type = type; 8807 8808 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 8809 } 8810 8811 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 8812 /** 8813 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 8814 * @param inquiry_mode see bluetooth_defines.h 8815 */ 8816 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8817 hci_stack->inquiry_mode = inquiry_mode; 8818 } 8819 8820 /** 8821 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8822 */ 8823 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8824 hci_stack->sco_voice_setting = voice_setting; 8825 } 8826 8827 /** 8828 * @brief Get SCO Voice Setting 8829 * @return current voice setting 8830 */ 8831 uint16_t hci_get_sco_voice_setting(void){ 8832 return hci_stack->sco_voice_setting; 8833 } 8834 8835 static int hci_have_usb_transport(void){ 8836 if (!hci_stack->hci_transport) return 0; 8837 const char * transport_name = hci_stack->hci_transport->name; 8838 if (!transport_name) return 0; 8839 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8840 } 8841 8842 /** @brief Get SCO packet length for current SCO Voice setting 8843 * @note Using SCO packets of the exact length is required for USB transfer 8844 * @return Length of SCO packets in bytes (not audio frames) 8845 */ 8846 uint16_t hci_get_sco_packet_length(void){ 8847 uint16_t sco_packet_length = 0; 8848 8849 #ifdef ENABLE_SCO_OVER_HCI 8850 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8851 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8852 8853 if (hci_have_usb_transport()){ 8854 // see Core Spec for H2 USB Transfer. 8855 // 3 byte SCO header + 24 bytes per connection 8856 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8857 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8858 } else { 8859 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8860 sco_packet_length = 3 + 60 * multiplier; 8861 // assert that it still fits inside an SCO buffer 8862 if (sco_packet_length > (hci_stack->sco_data_packet_length + 3)){ 8863 sco_packet_length = 3 + 60; 8864 } 8865 } 8866 #endif 8867 8868 #ifdef HAVE_SCO_TRANSPORT 8869 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8870 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8871 sco_packet_length = 3 + 60 * multiplier; 8872 #endif 8873 return sco_packet_length; 8874 } 8875 8876 /** 8877 * @brief Sets the master/slave policy 8878 * @param policy (0: attempt to become master, 1: let connecting device decide) 8879 */ 8880 void hci_set_master_slave_policy(uint8_t policy){ 8881 hci_stack->master_slave_policy = policy; 8882 } 8883 8884 #endif 8885 8886 HCI_STATE hci_get_state(void){ 8887 return hci_stack->state; 8888 } 8889 8890 #ifdef ENABLE_CLASSIC 8891 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8892 hci_stack->gap_classic_accept_callback = accept_callback; 8893 } 8894 #endif 8895 8896 /** 8897 * @brief Set callback for Bluetooth Hardware Error 8898 */ 8899 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8900 hci_stack->hardware_error_callback = fn; 8901 } 8902 8903 void hci_disconnect_all(void){ 8904 btstack_linked_list_iterator_t it; 8905 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8906 while (btstack_linked_list_iterator_has_next(&it)){ 8907 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8908 if (con->state == SENT_DISCONNECT) continue; 8909 con->state = SEND_DISCONNECT; 8910 } 8911 hci_run(); 8912 } 8913 8914 uint16_t hci_get_manufacturer(void){ 8915 return hci_stack->manufacturer; 8916 } 8917 8918 #ifdef ENABLE_BLE 8919 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8920 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8921 if (!hci_con) return NULL; 8922 return &hci_con->sm_connection; 8923 } 8924 8925 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8926 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8927 #endif 8928 8929 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8930 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8931 if (hci_connection == NULL) return 0; 8932 if (hci_is_le_connection(hci_connection)){ 8933 #ifdef ENABLE_BLE 8934 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8935 if (sm_conn->sm_connection_encrypted) { 8936 return sm_conn->sm_actual_encryption_key_size; 8937 } 8938 #endif 8939 } else { 8940 #ifdef ENABLE_CLASSIC 8941 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8942 return hci_connection->encryption_key_size; 8943 } 8944 #endif 8945 } 8946 return 0; 8947 } 8948 8949 bool gap_authenticated(hci_con_handle_t con_handle){ 8950 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8951 if (hci_connection == NULL) return false; 8952 8953 switch (hci_connection->address_type){ 8954 #ifdef ENABLE_BLE 8955 case BD_ADDR_TYPE_LE_PUBLIC: 8956 case BD_ADDR_TYPE_LE_RANDOM: 8957 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8958 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8959 #endif 8960 #ifdef ENABLE_CLASSIC 8961 case BD_ADDR_TYPE_SCO: 8962 case BD_ADDR_TYPE_ACL: 8963 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8964 #endif 8965 default: 8966 return false; 8967 } 8968 } 8969 8970 bool gap_secure_connection(hci_con_handle_t con_handle){ 8971 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8972 if (hci_connection == NULL) return 0; 8973 8974 switch (hci_connection->address_type){ 8975 #ifdef ENABLE_BLE 8976 case BD_ADDR_TYPE_LE_PUBLIC: 8977 case BD_ADDR_TYPE_LE_RANDOM: 8978 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8979 return hci_connection->sm_connection.sm_connection_sc != 0; 8980 #endif 8981 #ifdef ENABLE_CLASSIC 8982 case BD_ADDR_TYPE_SCO: 8983 case BD_ADDR_TYPE_ACL: 8984 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8985 #endif 8986 default: 8987 return false; 8988 } 8989 } 8990 8991 bool gap_bonded(hci_con_handle_t con_handle){ 8992 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8993 if (hci_connection == NULL) return 0; 8994 8995 #ifdef ENABLE_CLASSIC 8996 link_key_t link_key; 8997 link_key_type_t link_key_type; 8998 #endif 8999 switch (hci_connection->address_type){ 9000 #ifdef ENABLE_BLE 9001 case BD_ADDR_TYPE_LE_PUBLIC: 9002 case BD_ADDR_TYPE_LE_RANDOM: 9003 return hci_connection->sm_connection.sm_le_db_index >= 0; 9004 #endif 9005 #ifdef ENABLE_CLASSIC 9006 case BD_ADDR_TYPE_SCO: 9007 case BD_ADDR_TYPE_ACL: 9008 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 9009 #endif 9010 default: 9011 return false; 9012 } 9013 } 9014 9015 #ifdef ENABLE_BLE 9016 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 9017 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 9018 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 9019 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 9020 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 9021 return sm_conn->sm_connection_authorization_state; 9022 } 9023 #endif 9024 9025 #ifdef ENABLE_CLASSIC 9026 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){ 9027 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9028 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9029 conn->sniff_min_interval = sniff_min_interval; 9030 conn->sniff_max_interval = sniff_max_interval; 9031 conn->sniff_attempt = sniff_attempt; 9032 conn->sniff_timeout = sniff_timeout; 9033 hci_run(); 9034 return 0; 9035 } 9036 9037 /** 9038 * @brief Exit Sniff mode 9039 * @param con_handle 9040 @ @return 0 if ok 9041 */ 9042 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 9043 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9044 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9045 conn->sniff_min_interval = 0xffff; 9046 hci_run(); 9047 return 0; 9048 } 9049 9050 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){ 9051 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9052 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9053 conn->sniff_subrating_max_latency = max_latency; 9054 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 9055 conn->sniff_subrating_min_local_timeout = min_local_timeout; 9056 hci_run(); 9057 return ERROR_CODE_SUCCESS; 9058 } 9059 9060 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){ 9061 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9062 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9063 conn->qos_service_type = service_type; 9064 conn->qos_token_rate = token_rate; 9065 conn->qos_peak_bandwidth = peak_bandwidth; 9066 conn->qos_latency = latency; 9067 conn->qos_delay_variation = delay_variation; 9068 hci_run(); 9069 return ERROR_CODE_SUCCESS; 9070 } 9071 9072 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 9073 hci_stack->new_page_scan_interval = page_scan_interval; 9074 hci_stack->new_page_scan_window = page_scan_window; 9075 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 9076 hci_run(); 9077 } 9078 9079 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 9080 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 9081 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 9082 hci_run(); 9083 } 9084 9085 void gap_set_page_timeout(uint16_t page_timeout){ 9086 hci_stack->page_timeout = page_timeout; 9087 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 9088 hci_run(); 9089 } 9090 9091 #endif 9092 9093 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 9094 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 9095 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 9096 if (le_device_db_index >= le_device_db_max_count()) return; 9097 uint8_t offset = le_device_db_index >> 3; 9098 uint8_t mask = 1 << (le_device_db_index & 7); 9099 hci_stack->le_resolving_list_add_entries[offset] |= mask; 9100 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 9101 // note: go back to remove entries, otherwise, a remove + add will skip the add 9102 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_UPDATES_ENTRIES; 9103 } 9104 } 9105 9106 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 9107 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 9108 if (le_device_db_index >= le_device_db_max_count()) return; 9109 uint8_t offset = le_device_db_index >> 3; 9110 uint8_t mask = 1 << (le_device_db_index & 7); 9111 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 9112 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 9113 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_UPDATES_ENTRIES; 9114 } 9115 } 9116 9117 uint8_t gap_load_resolving_list_from_le_device_db(void){ 9118 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 9119 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 9120 } 9121 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 9122 // restart le resolving list update 9123 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 9124 } 9125 return ERROR_CODE_SUCCESS; 9126 } 9127 #endif 9128 9129 #ifdef ENABLE_BLE 9130 #ifdef ENABLE_LE_CENTRAL 9131 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 9132 9133 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9134 // check if already in list 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->sid != advertising_sid) { 9140 continue; 9141 } 9142 if (entry->address_type != address_type) { 9143 continue; 9144 } 9145 if (memcmp(entry->address, address, 6) != 0) { 9146 continue; 9147 } 9148 // disallow if already scheduled to add 9149 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 9150 return ERROR_CODE_COMMAND_DISALLOWED; 9151 } 9152 // still on controller, but scheduled to remove -> re-add 9153 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 9154 return ERROR_CODE_SUCCESS; 9155 } 9156 // alloc and add to list 9157 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 9158 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 9159 entry->sid = advertising_sid; 9160 entry->address_type = address_type; 9161 (void)memcpy(entry->address, address, 6); 9162 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 9163 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 9164 return ERROR_CODE_SUCCESS; 9165 } 9166 9167 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9168 btstack_linked_list_iterator_t it; 9169 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9170 while (btstack_linked_list_iterator_has_next(&it)){ 9171 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 9172 if (entry->sid != advertising_sid) { 9173 continue; 9174 } 9175 if (entry->address_type != address_type) { 9176 continue; 9177 } 9178 if (memcmp(entry->address, address, 6) != 0) { 9179 continue; 9180 } 9181 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 9182 // remove from controller if already present 9183 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 9184 } else { 9185 // directly remove entry from whitelist 9186 btstack_linked_list_iterator_remove(&it); 9187 btstack_memory_periodic_advertiser_list_entry_free(entry); 9188 } 9189 return ERROR_CODE_SUCCESS; 9190 } 9191 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9192 } 9193 9194 static void hci_periodic_advertiser_list_clear(void){ 9195 btstack_linked_list_iterator_t it; 9196 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9197 while (btstack_linked_list_iterator_has_next(&it)){ 9198 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 9199 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 9200 // remove from controller if already present 9201 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 9202 continue; 9203 } 9204 // directly remove entry from whitelist 9205 btstack_linked_list_iterator_remove(&it); 9206 btstack_memory_periodic_advertiser_list_entry_free(entry); 9207 } 9208 } 9209 9210 uint8_t gap_periodic_advertiser_list_clear(void){ 9211 hci_periodic_advertiser_list_clear(); 9212 hci_run(); 9213 return ERROR_CODE_SUCCESS; 9214 } 9215 9216 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9217 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 9218 if (status){ 9219 return status; 9220 } 9221 hci_run(); 9222 return ERROR_CODE_SUCCESS; 9223 } 9224 9225 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9226 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 9227 if (status){ 9228 return status; 9229 } 9230 hci_run(); 9231 return ERROR_CODE_SUCCESS; 9232 } 9233 9234 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 9235 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 9236 // abort if already active 9237 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 9238 return ERROR_CODE_COMMAND_DISALLOWED; 9239 } 9240 // store request 9241 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 9242 hci_stack->le_periodic_sync_options = options; 9243 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 9244 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 9245 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 9246 hci_stack->le_periodic_sync_skip = skip; 9247 hci_stack->le_periodic_sync_timeout = sync_timeout; 9248 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 9249 9250 hci_run(); 9251 return ERROR_CODE_SUCCESS; 9252 } 9253 9254 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 9255 // abort if not requested 9256 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 9257 return ERROR_CODE_COMMAND_DISALLOWED; 9258 } 9259 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 9260 hci_run(); 9261 return ERROR_CODE_SUCCESS; 9262 } 9263 9264 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 9265 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 9266 return ERROR_CODE_COMMAND_DISALLOWED; 9267 } 9268 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 9269 hci_run(); 9270 return ERROR_CODE_SUCCESS; 9271 } 9272 9273 #endif 9274 #endif 9275 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 9276 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id, 9277 hci_iso_stream_state_t state) { 9278 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 9279 if (iso_stream == NULL){ 9280 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 9281 } else { 9282 iso_stream->iso_type = iso_type; 9283 iso_stream->state = state; 9284 iso_stream->con_handle = con_handle; 9285 iso_stream->group_id = group_id; 9286 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 9287 return ERROR_CODE_SUCCESS; 9288 } 9289 } 9290 9291 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle){ 9292 btstack_linked_list_iterator_t it; 9293 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9294 while (btstack_linked_list_iterator_has_next(&it)){ 9295 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9296 if (iso_stream->con_handle == con_handle ) { 9297 return iso_stream; 9298 } 9299 } 9300 return NULL; 9301 } 9302 9303 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 9304 log_info("hci_iso_stream_finalize con_handle 0x%04x, group_id 0x%02x", iso_stream->con_handle, iso_stream->group_id); 9305 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 9306 btstack_memory_hci_iso_stream_free(iso_stream); 9307 } 9308 9309 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id) { 9310 btstack_linked_list_iterator_t it; 9311 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9312 while (btstack_linked_list_iterator_has_next(&it)){ 9313 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9314 if ((iso_stream->group_id == group_id) && 9315 (iso_stream->iso_type == iso_type)){ 9316 btstack_linked_list_iterator_remove(&it); 9317 btstack_memory_hci_iso_stream_free(iso_stream); 9318 } 9319 } 9320 } 9321 9322 static void hci_iso_stream_requested_finalize(uint8_t group_id) { 9323 btstack_linked_list_iterator_t it; 9324 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9325 while (btstack_linked_list_iterator_has_next(&it)){ 9326 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9327 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 9328 (iso_stream->group_id == group_id)){ 9329 btstack_linked_list_iterator_remove(&it); 9330 btstack_memory_hci_iso_stream_free(iso_stream); 9331 } 9332 } 9333 } 9334 static void hci_iso_stream_requested_confirm(uint8_t big_handle){ 9335 btstack_linked_list_iterator_t it; 9336 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9337 while (btstack_linked_list_iterator_has_next(&it)){ 9338 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9339 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 9340 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 9341 } 9342 } 9343 } 9344 9345 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 9346 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 9347 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 9348 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 9349 return (sdu_len_offset + 2 + sdu_len) == size; 9350 } 9351 9352 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 9353 if (hci_stack->iso_packet_handler == NULL) { 9354 return; 9355 } 9356 if (size < 4) { 9357 return; 9358 } 9359 9360 // parse header 9361 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 9362 uint16_t iso_data_len = little_endian_read_16(packet, 2); 9363 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 9364 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_handle); 9365 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 9366 9367 // assert packet is complete 9368 if ((iso_data_len + 4u) != size){ 9369 return; 9370 } 9371 9372 if ((pb_flag & 0x01) == 0){ 9373 if (pb_flag == 0x02){ 9374 // The ISO_Data_Load field contains a header and a complete SDU. 9375 if (hci_iso_sdu_complete(packet, size)) { 9376 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 9377 } 9378 } else { 9379 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 9380 if (iso_stream == NULL){ 9381 return; 9382 } 9383 if (size > HCI_ISO_PAYLOAD_SIZE){ 9384 return; 9385 } 9386 memcpy(iso_stream->reassembly_buffer, packet, size); 9387 // fix pb_flag 9388 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 9389 iso_stream->reassembly_pos = size; 9390 } 9391 } else { 9392 // iso_data_load contains continuation or last fragment of an SDU 9393 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 9394 if (ts_flag != 0){ 9395 return; 9396 } 9397 // append fragment 9398 if (iso_stream == NULL){ 9399 return; 9400 } 9401 if (iso_stream->reassembly_pos == 0){ 9402 return; 9403 } 9404 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 9405 // reset reassembly buffer 9406 iso_stream->reassembly_pos = 0; 9407 return; 9408 } 9409 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 9410 iso_stream->reassembly_pos += iso_data_len; 9411 9412 // deliver if last fragment and SDU complete 9413 if (pb_flag == 0x03){ 9414 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 9415 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 9416 } 9417 iso_stream->reassembly_pos = 0; 9418 } 9419 } 9420 } 9421 9422 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status){ 9423 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9424 uint16_t pos = 0; 9425 event[pos++] = HCI_EVENT_META_GAP; 9426 event[pos++] = 4 + (2 * big->num_bis); 9427 event[pos++] = GAP_SUBEVENT_BIG_CREATED; 9428 event[pos++] = status; 9429 event[pos++] = big->big_handle; 9430 event[pos++] = big->num_bis; 9431 uint8_t i; 9432 for (i=0;i<big->num_bis;i++){ 9433 little_endian_store_16(event, pos, big->bis_con_handles[i]); 9434 pos += 2; 9435 } 9436 hci_emit_event(event, pos, 0); 9437 } 9438 9439 static void hci_emit_cig_created(const le_audio_cig_t * cig, uint8_t status){ 9440 uint8_t event [6 + (MAX_NR_CIS * 2)]; 9441 uint16_t pos = 0; 9442 event[pos++] = HCI_EVENT_META_GAP; 9443 event[pos++] = 4 + (2 * cig->num_cis); 9444 event[pos++] = GAP_SUBEVENT_CIG_CREATED; 9445 event[pos++] = status; 9446 event[pos++] = cig->cig_id; 9447 event[pos++] = cig->num_cis; 9448 uint8_t i; 9449 for (i=0;i<cig->num_cis;i++){ 9450 little_endian_store_16(event, pos, cig->cis_con_handles[i]); 9451 pos += 2; 9452 } 9453 hci_emit_event(event, pos, 0); 9454 } 9455 9456 static void 9457 hci_emit_cis_created(uint8_t cig_id, hci_con_handle_t cis_con_handle, uint8_t status) { 9458 uint8_t event [7]; 9459 uint16_t pos = 0; 9460 event[pos++] = HCI_EVENT_META_GAP; 9461 event[pos++] = 5; 9462 event[pos++] = GAP_SUBEVENT_CIS_CREATED; 9463 event[pos++] = status; 9464 event[pos++] = cig_id; 9465 little_endian_store_16(event, pos, cis_con_handle); 9466 pos += 2; 9467 hci_emit_event(event, pos, 0); 9468 } 9469 9470 static void hci_emit_big_terminated(const le_audio_big_t * big){ 9471 uint8_t event [4]; 9472 uint16_t pos = 0; 9473 event[pos++] = HCI_EVENT_META_GAP; 9474 event[pos++] = 2; 9475 event[pos++] = GAP_SUBEVENT_BIG_TERMINATED; 9476 event[pos++] = big->big_handle; 9477 hci_emit_event(event, pos, 0); 9478 } 9479 9480 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status){ 9481 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9482 uint16_t pos = 0; 9483 event[pos++] = HCI_EVENT_META_GAP; 9484 event[pos++] = 4; 9485 event[pos++] = GAP_SUBEVENT_BIG_SYNC_CREATED; 9486 event[pos++] = status; 9487 event[pos++] = big_sync->big_handle; 9488 event[pos++] = big_sync->num_bis; 9489 uint8_t i; 9490 for (i=0;i<big_sync->num_bis;i++){ 9491 little_endian_store_16(event, pos, big_sync->bis_con_handles[i]); 9492 pos += 2; 9493 } 9494 hci_emit_event(event, pos, 0); 9495 } 9496 9497 static void hci_emit_big_sync_stopped(uint8_t big_handle){ 9498 uint8_t event [4]; 9499 uint16_t pos = 0; 9500 event[pos++] = HCI_EVENT_META_GAP; 9501 event[pos++] = 2; 9502 event[pos++] = GAP_SUBEVENT_BIG_SYNC_STOPPED; 9503 event[pos++] = big_handle; 9504 hci_emit_event(event, pos, 0); 9505 } 9506 9507 static void hci_emit_bis_can_send_now(const le_audio_big_t *big, uint8_t bis_index) { 9508 uint8_t event[6]; 9509 uint16_t pos = 0; 9510 event[pos++] = HCI_EVENT_BIS_CAN_SEND_NOW; 9511 event[pos++] = sizeof(event) - 2; 9512 event[pos++] = big->big_handle; 9513 event[pos++] = bis_index; 9514 little_endian_store_16(event, pos, big->bis_con_handles[bis_index]); 9515 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9516 } 9517 9518 static void hci_emit_cis_can_send_now(hci_con_handle_t cis_con_handle) { 9519 uint8_t event[4]; 9520 uint16_t pos = 0; 9521 event[pos++] = HCI_EVENT_CIS_CAN_SEND_NOW; 9522 event[pos++] = sizeof(event) - 2; 9523 little_endian_store_16(event, pos, cis_con_handle); 9524 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9525 } 9526 9527 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle){ 9528 btstack_linked_list_iterator_t it; 9529 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9530 while (btstack_linked_list_iterator_has_next(&it)){ 9531 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9532 if ( big->big_handle == big_handle ) { 9533 return big; 9534 } 9535 } 9536 return NULL; 9537 } 9538 9539 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle){ 9540 btstack_linked_list_iterator_t it; 9541 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 9542 while (btstack_linked_list_iterator_has_next(&it)){ 9543 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 9544 if ( big_sync->big_handle == big_handle ) { 9545 return big_sync; 9546 } 9547 } 9548 return NULL; 9549 } 9550 9551 void hci_set_num_iso_packets_to_queue(uint8_t num_packets){ 9552 hci_stack->iso_packets_to_queue = num_packets; 9553 } 9554 9555 static le_audio_cig_t * hci_cig_for_id(uint8_t cig_id){ 9556 btstack_linked_list_iterator_t it; 9557 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_cigs); 9558 while (btstack_linked_list_iterator_has_next(&it)){ 9559 le_audio_cig_t * cig = (le_audio_cig_t *) btstack_linked_list_iterator_next(&it); 9560 if ( cig->cig_id == cig_id ) { 9561 return cig; 9562 } 9563 } 9564 return NULL; 9565 } 9566 9567 static void hci_iso_notify_can_send_now(void){ 9568 9569 // BIG 9570 9571 btstack_linked_list_iterator_t it; 9572 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9573 while (btstack_linked_list_iterator_has_next(&it)){ 9574 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9575 // track number completed packet timestamps 9576 if (big->num_completed_timestamp_current_valid){ 9577 big->num_completed_timestamp_current_valid = false; 9578 if (big->num_completed_timestamp_previous_valid){ 9579 // detect delayed sending of all BIS: tolerate up to 50% delayed event handling 9580 uint32_t iso_interval_missed_threshold_ms = big->params->sdu_interval_us * 3 / 2000; 9581 int32_t num_completed_timestamp_delta_ms = btstack_time_delta(big->num_completed_timestamp_current_ms, 9582 big->num_completed_timestamp_previous_ms); 9583 if (num_completed_timestamp_delta_ms > iso_interval_missed_threshold_ms){ 9584 // to catch up, skip packet on all BIS 9585 uint8_t i; 9586 for (i=0;i<big->num_bis;i++){ 9587 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9588 if (iso_stream){ 9589 iso_stream->num_packets_to_skip++; 9590 } 9591 } 9592 } 9593 } 9594 big->num_completed_timestamp_previous_valid = true; 9595 big->num_completed_timestamp_previous_ms = big->num_completed_timestamp_current_ms; 9596 } 9597 9598 if (big->can_send_now_requested){ 9599 // check if no outgoing iso packets pending and no can send now have to be emitted 9600 uint8_t i; 9601 bool can_send = true; 9602 uint8_t num_iso_queued_minimum = 0; 9603 for (i=0;i<big->num_bis;i++){ 9604 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9605 if (iso_stream == NULL) continue; 9606 // handle case where individual ISO packet was sent too late: 9607 // for each additionally queued packet, a new one needs to get skipped 9608 if (i==0){ 9609 num_iso_queued_minimum = iso_stream->num_packets_sent; 9610 } else if (iso_stream->num_packets_sent > num_iso_queued_minimum){ 9611 uint8_t num_packets_to_skip = iso_stream->num_packets_sent - num_iso_queued_minimum; 9612 iso_stream->num_packets_to_skip += num_packets_to_skip; 9613 iso_stream->num_packets_sent -= num_packets_to_skip; 9614 } 9615 // check if we can send now 9616 if ((iso_stream->num_packets_sent >= hci_stack->iso_packets_to_queue) || (iso_stream->emit_ready_to_send)){ 9617 can_send = false; 9618 break; 9619 } 9620 } 9621 if (can_send){ 9622 // propagate can send now to individual streams 9623 big->can_send_now_requested = false; 9624 for (i=0;i<big->num_bis;i++){ 9625 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9626 iso_stream->emit_ready_to_send = true; 9627 } 9628 } 9629 } 9630 } 9631 9632 if (hci_stack->hci_packet_buffer_reserved) return; 9633 9634 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9635 while (btstack_linked_list_iterator_has_next(&it)){ 9636 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9637 // report bis ready 9638 uint8_t i; 9639 for (i=0;i<big->num_bis;i++){ 9640 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9641 if ((iso_stream != NULL) && iso_stream->emit_ready_to_send){ 9642 iso_stream->emit_ready_to_send = false; 9643 hci_emit_bis_can_send_now(big, i); 9644 break; 9645 } 9646 } 9647 } 9648 9649 // CIS 9650 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9651 while (btstack_linked_list_iterator_has_next(&it)) { 9652 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9653 if ((iso_stream->can_send_now_requested) && 9654 (iso_stream->num_packets_sent < hci_stack->iso_packets_to_queue)){ 9655 iso_stream->can_send_now_requested = false; 9656 hci_emit_cis_can_send_now(iso_stream->con_handle); 9657 } 9658 } 9659 } 9660 9661 uint8_t gap_big_create(le_audio_big_t * storage, le_audio_big_params_t * big_params){ 9662 if (hci_big_for_handle(big_params->big_handle) != NULL){ 9663 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9664 } 9665 if (big_params->num_bis == 0){ 9666 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9667 } 9668 if (big_params->num_bis > MAX_NR_BIS){ 9669 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9670 } 9671 9672 // reserve ISO Streams 9673 uint8_t i; 9674 uint8_t status = ERROR_CODE_SUCCESS; 9675 for (i=0;i<big_params->num_bis;i++){ 9676 status = hci_iso_stream_create(HCI_ISO_TYPE_BIS, HCI_CON_HANDLE_INVALID, big_params->big_handle, 9677 HCI_ISO_STREAM_STATE_REQUESTED); 9678 if (status != ERROR_CODE_SUCCESS) { 9679 break; 9680 } 9681 } 9682 9683 // free structs on error 9684 if (status != ERROR_CODE_SUCCESS){ 9685 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big_params->big_handle); 9686 return status; 9687 } 9688 9689 le_audio_big_t * big = storage; 9690 big->big_handle = big_params->big_handle; 9691 big->params = big_params; 9692 big->state = LE_AUDIO_BIG_STATE_CREATE; 9693 big->num_bis = big_params->num_bis; 9694 btstack_linked_list_add(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9695 9696 hci_run(); 9697 9698 return ERROR_CODE_SUCCESS; 9699 } 9700 9701 uint8_t gap_big_sync_create(le_audio_big_sync_t * storage, le_audio_big_sync_params_t * big_sync_params){ 9702 if (hci_big_sync_for_handle(big_sync_params->big_handle) != NULL){ 9703 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9704 } 9705 if (big_sync_params->num_bis == 0){ 9706 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9707 } 9708 if (big_sync_params->num_bis > MAX_NR_BIS){ 9709 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9710 } 9711 9712 le_audio_big_sync_t * big_sync = storage; 9713 big_sync->big_handle = big_sync_params->big_handle; 9714 big_sync->params = big_sync_params; 9715 big_sync->state = LE_AUDIO_BIG_STATE_CREATE; 9716 big_sync->num_bis = big_sync_params->num_bis; 9717 btstack_linked_list_add(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9718 9719 hci_run(); 9720 9721 return ERROR_CODE_SUCCESS; 9722 } 9723 9724 uint8_t gap_big_terminate(uint8_t big_handle){ 9725 le_audio_big_t * big = hci_big_for_handle(big_handle); 9726 if (big == NULL){ 9727 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9728 } 9729 switch (big->state){ 9730 case LE_AUDIO_BIG_STATE_CREATE: 9731 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9732 hci_emit_big_terminated(big); 9733 break; 9734 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9735 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9736 break; 9737 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9738 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9739 case LE_AUDIO_BIG_STATE_ACTIVE: 9740 big->state = LE_AUDIO_BIG_STATE_TERMINATE; 9741 hci_run(); 9742 break; 9743 default: 9744 return ERROR_CODE_COMMAND_DISALLOWED; 9745 } 9746 return ERROR_CODE_SUCCESS; 9747 } 9748 9749 uint8_t gap_big_sync_terminate(uint8_t big_handle){ 9750 le_audio_big_sync_t * big_sync = hci_big_sync_for_handle(big_handle); 9751 if (big_sync == NULL){ 9752 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9753 } 9754 switch (big_sync->state){ 9755 case LE_AUDIO_BIG_STATE_CREATE: 9756 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9757 hci_emit_big_sync_stopped(big_handle); 9758 break; 9759 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9760 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9761 break; 9762 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9763 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9764 case LE_AUDIO_BIG_STATE_ACTIVE: 9765 big_sync->state = LE_AUDIO_BIG_STATE_TERMINATE; 9766 hci_run(); 9767 break; 9768 default: 9769 return ERROR_CODE_COMMAND_DISALLOWED; 9770 } 9771 return ERROR_CODE_SUCCESS; 9772 } 9773 9774 uint8_t hci_request_bis_can_send_now_events(uint8_t big_handle){ 9775 le_audio_big_t * big = hci_big_for_handle(big_handle); 9776 if (big == NULL){ 9777 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9778 } 9779 if (big->state != LE_AUDIO_BIG_STATE_ACTIVE){ 9780 return ERROR_CODE_COMMAND_DISALLOWED; 9781 } 9782 big->can_send_now_requested = true; 9783 hci_iso_notify_can_send_now(); 9784 return ERROR_CODE_SUCCESS; 9785 } 9786 9787 uint8_t hci_request_cis_can_send_now_events(hci_con_handle_t cis_con_handle){ 9788 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_con_handle); 9789 if (iso_stream == NULL){ 9790 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9791 } 9792 if ((iso_stream->iso_type != HCI_ISO_TYPE_CIS) && (iso_stream->state != HCI_ISO_STREAM_STATE_ESTABLISHED)) { 9793 return ERROR_CODE_COMMAND_DISALLOWED; 9794 } 9795 iso_stream->can_send_now_requested = true; 9796 hci_iso_notify_can_send_now(); 9797 return ERROR_CODE_SUCCESS; 9798 } 9799 9800 uint8_t gap_cig_create(le_audio_cig_t * storage, le_audio_cig_params_t * cig_params){ 9801 if (hci_cig_for_id(cig_params->cig_id) != NULL){ 9802 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9803 } 9804 if (cig_params->num_cis == 0){ 9805 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9806 } 9807 if (cig_params->num_cis > MAX_NR_BIS){ 9808 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9809 } 9810 9811 // reserve ISO Streams 9812 uint8_t i; 9813 uint8_t status = ERROR_CODE_SUCCESS; 9814 for (i=0;i<cig_params->num_cis;i++){ 9815 status = hci_iso_stream_create(HCI_ISO_TYPE_CIS, HCI_CON_HANDLE_INVALID, cig_params->cig_id, 9816 HCI_ISO_STREAM_STATE_REQUESTED); 9817 if (status != ERROR_CODE_SUCCESS) { 9818 break; 9819 } 9820 } 9821 9822 // free structs on error 9823 if (status != ERROR_CODE_SUCCESS){ 9824 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_CIS, cig_params->cig_id); 9825 return status; 9826 } 9827 9828 le_audio_cig_t * cig = storage; 9829 cig->cig_id = cig_params->cig_id; 9830 cig->num_cis = cig_params->num_cis; 9831 cig->params = cig_params; 9832 cig->state = LE_AUDIO_CIG_STATE_CREATE; 9833 for (i=0;i<cig->num_cis;i++){ 9834 cig->cis_con_handles[i] = HCI_CON_HANDLE_INVALID; 9835 cig->acl_con_handles[i] = HCI_CON_HANDLE_INVALID; 9836 } 9837 btstack_linked_list_add(&hci_stack->le_audio_cigs, (btstack_linked_item_t *) cig); 9838 9839 hci_run(); 9840 9841 return ERROR_CODE_SUCCESS; 9842 } 9843 9844 uint8_t gap_cis_create(uint8_t cig_handle, hci_con_handle_t cis_con_handles [], hci_con_handle_t acl_con_handles []){ 9845 le_audio_cig_t * cig = hci_cig_for_id(cig_handle); 9846 if (cig == NULL){ 9847 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9848 } 9849 9850 if (cig->state != LE_AUDIO_CIG_STATE_W4_CIS_REQUEST){ 9851 return ERROR_CODE_COMMAND_DISALLOWED; 9852 } 9853 9854 // store ACL Connection Handles 9855 uint8_t i; 9856 for (i=0;i<cig->num_cis;i++){ 9857 // check that all con handles exit 9858 hci_con_handle_t cis_handle = cis_con_handles[i]; 9859 uint8_t j; 9860 bool found = false; 9861 for (j=0;j<cig->num_cis;j++){ 9862 if (cig->cis_con_handles[j] == cis_handle){ 9863 cig->acl_con_handles[j] = acl_con_handles[j]; 9864 found = true; 9865 break; 9866 } 9867 } 9868 if (!found){ 9869 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9870 } 9871 } 9872 9873 cig->state = LE_AUDIO_CIG_STATE_CREATE_CIS; 9874 hci_run(); 9875 9876 return ERROR_CODE_SUCCESS; 9877 } 9878 9879 static uint8_t hci_cis_accept_or_reject(hci_con_handle_t cis_con_handle, hci_iso_stream_state_t state){ 9880 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_con_handle); 9881 if (iso_stream != NULL){ 9882 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9883 } 9884 9885 uint8_t status = hci_iso_stream_create(HCI_ISO_TYPE_CIS, cis_con_handle, 9886 HCI_ISO_GROUP_ID_INVALID, state); 9887 if (status == ERROR_CODE_SUCCESS){ 9888 return status; 9889 } 9890 9891 hci_run(); 9892 return ERROR_CODE_SUCCESS; 9893 } 9894 9895 uint8_t gap_cis_accept(hci_con_handle_t cis_con_handle){ 9896 return hci_cis_accept_or_reject(cis_con_handle, HCI_ISO_STREAM_W2_ACCEPT); 9897 } 9898 9899 uint8_t gap_cis_reject(hci_con_handle_t cis_con_handle){ 9900 return hci_cis_accept_or_reject(cis_con_handle, HCI_ISO_STREAM_W2_REJECT); 9901 } 9902 9903 9904 #endif 9905 #endif /* ENABLE_BLE */ 9906 9907 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 9908 void hci_setup_test_connections_fuzz(void){ 9909 hci_connection_t * conn; 9910 9911 // default address: 66:55:44:33:00:01 9912 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 9913 9914 // setup Controller info 9915 hci_stack->num_cmd_packets = 255; 9916 hci_stack->acl_packets_total_num = 255; 9917 9918 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 9919 addr[5] = 0x01; 9920 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9921 conn->con_handle = addr[5]; 9922 conn->role = HCI_ROLE_SLAVE; 9923 conn->state = RECEIVED_CONNECTION_REQUEST; 9924 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9925 9926 // setup incoming Classic SCO connection with con handle 0x0002 9927 addr[5] = 0x02; 9928 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9929 conn->con_handle = addr[5]; 9930 conn->role = HCI_ROLE_SLAVE; 9931 conn->state = RECEIVED_CONNECTION_REQUEST; 9932 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9933 9934 // setup ready Classic ACL connection with con handle 0x0003 9935 addr[5] = 0x03; 9936 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9937 conn->con_handle = addr[5]; 9938 conn->role = HCI_ROLE_SLAVE; 9939 conn->state = OPEN; 9940 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9941 9942 // setup ready Classic SCO connection with con handle 0x0004 9943 addr[5] = 0x04; 9944 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9945 conn->con_handle = addr[5]; 9946 conn->role = HCI_ROLE_SLAVE; 9947 conn->state = OPEN; 9948 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9949 9950 // setup ready LE ACL connection with con handle 0x005 and public address 9951 addr[5] = 0x05; 9952 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 9953 conn->con_handle = addr[5]; 9954 conn->role = HCI_ROLE_SLAVE; 9955 conn->state = OPEN; 9956 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9957 conn->sm_connection.sm_connection_encrypted = 1; 9958 } 9959 9960 void hci_free_connections_fuzz(void){ 9961 btstack_linked_list_iterator_t it; 9962 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 9963 while (btstack_linked_list_iterator_has_next(&it)){ 9964 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 9965 btstack_linked_list_iterator_remove(&it); 9966 btstack_memory_hci_connection_free(con); 9967 } 9968 } 9969 void hci_simulate_working_fuzz(void){ 9970 hci_stack->le_scanning_param_update = false; 9971 hci_init_done(); 9972 hci_stack->num_cmd_packets = 255; 9973 } 9974 #endif 9975