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 #ifndef HCI_ACL_CHUNK_SIZE_ALIGNMENT 104 #define HCI_ACL_CHUNK_SIZE_ALIGNMENT 1 105 #endif 106 107 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 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 ENABLE_SCO_OVER_PCM." 109 #endif 110 111 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 112 #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." 113 #endif 114 115 #define HCI_CONNECTION_TIMEOUT_MS 10000 116 117 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 118 #define HCI_RESET_RESEND_TIMEOUT_MS 200 119 #endif 120 121 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 122 #ifndef GAP_INQUIRY_MAX_NAME_LEN 123 #define GAP_INQUIRY_MAX_NAME_LEN 32 124 #endif 125 126 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 127 #define GAP_INQUIRY_DURATION_MIN 0x01 128 #define GAP_INQUIRY_DURATION_MAX 0x30 129 #define GAP_INQUIRY_MIN_PERIODIC_LEN_MIN 0x02 130 #define GAP_INQUIRY_MAX_PERIODIC_LEN_MIN 0x03 131 #define GAP_INQUIRY_STATE_IDLE 0x00 132 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 133 #define GAP_INQUIRY_STATE_ACTIVE 0x81 134 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 135 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 136 #define GAP_INQUIRY_STATE_PERIODIC 0x84 137 #define GAP_INQUIRY_STATE_W2_EXIT_PERIODIC 0x85 138 139 // GAP Remote Name Request 140 #define GAP_REMOTE_NAME_STATE_IDLE 0 141 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 142 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 143 144 // GAP Pairing 145 #define GAP_PAIRING_STATE_IDLE 0 146 #define GAP_PAIRING_STATE_SEND_PIN 1 147 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 148 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 149 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 150 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 151 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 152 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 153 154 // 155 // compact storage of relevant supported HCI Commands. 156 // X-Macro below provides enumeration and mapping table into the supported 157 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 158 // 159 160 // format: command name, byte offset, bit nr in 64-byte supported commands 161 // currently stored in 32-bit variable 162 #define SUPPORTED_HCI_COMMANDS \ 163 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 164 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 165 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 166 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 167 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 168 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 169 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 170 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 171 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 172 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 173 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 174 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 175 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 176 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 177 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 178 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 179 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 180 181 // enumerate supported commands 182 #define X(name, offset, bit) name, 183 enum { 184 SUPPORTED_HCI_COMMANDS 185 SUPPORTED_HCI_COMMANDS_COUNT 186 }; 187 #undef X 188 189 // prototypes 190 #ifdef ENABLE_CLASSIC 191 static void hci_update_scan_enable(void); 192 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable); 193 static int hci_local_ssp_activated(void); 194 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 195 static bool hci_ssp_supported(hci_connection_t * connection); 196 static void hci_notify_if_sco_can_send_now(void); 197 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 198 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 199 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 200 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 201 static void hci_connection_timestamp(hci_connection_t *connection); 202 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 203 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 204 #endif 205 206 static int hci_power_control_on(void); 207 static void hci_power_control_off(void); 208 static void hci_state_reset(void); 209 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 210 static void hci_emit_transport_packet_sent(void); 211 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 212 static void hci_emit_nr_connections_changed(void); 213 static void hci_emit_hci_open_failed(void); 214 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 215 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 216 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 217 static void hci_run(void); 218 static int hci_is_le_connection(hci_connection_t * connection); 219 220 #ifdef ENABLE_CLASSIC 221 static int hci_have_usb_transport(void); 222 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 223 #endif 224 225 #ifdef ENABLE_BLE 226 #ifdef ENABLE_LE_CENTRAL 227 // called from test/ble_client/advertising_data_parser.c 228 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 229 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 230 static hci_connection_t * gap_get_outgoing_connection(void); 231 static void hci_le_scan_stop(void); 232 static bool hci_run_general_gap_le(void); 233 #endif 234 #ifdef ENABLE_LE_PERIPHERAL 235 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 236 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 237 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 238 #endif /* ENABLE_LE_PERIPHERAL */ 239 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 240 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id, 241 hci_iso_stream_state_t state); 242 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream); 243 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id); 244 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle); 245 static void hci_iso_stream_requested_finalize(uint8_t big_handle); 246 static void hci_iso_stream_requested_confirm(uint8_t big_handle); 247 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size); 248 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle); 249 static le_audio_cig_t * hci_cig_for_id(uint8_t cig_id); 250 static void hci_iso_notify_can_send_now(void); 251 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status); 252 static void hci_emit_big_terminated(const le_audio_big_t * big); 253 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status); 254 static void hci_emit_big_sync_stopped(uint8_t big_handle); 255 static void hci_emit_cig_created(const le_audio_cig_t * cig, uint8_t status); 256 static void 257 hci_emit_cis_created(uint8_t cig_id, hci_con_handle_t cis_con_handle, uint8_t status); 258 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle); 259 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 260 #endif /* ENABLE_BLE */ 261 262 // the STACK is here 263 #ifndef HAVE_MALLOC 264 static hci_stack_t hci_stack_static; 265 #endif 266 static hci_stack_t * hci_stack = NULL; 267 268 #ifdef ENABLE_CLASSIC 269 // default name 270 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 271 272 // test helper 273 static uint8_t disable_l2cap_timeouts = 0; 274 #endif 275 276 // reset connection state on create and on reconnect 277 // don't overwrite addr, con handle, role 278 static void hci_connection_init(hci_connection_t * conn){ 279 conn->authentication_flags = AUTH_FLAG_NONE; 280 conn->bonding_flags = 0; 281 conn->requested_security_level = LEVEL_0; 282 #ifdef ENABLE_CLASSIC 283 conn->request_role = HCI_ROLE_INVALID; 284 conn->sniff_subrating_max_latency = 0xffff; 285 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 286 conn->link_key_type = INVALID_LINK_KEY; 287 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 288 btstack_run_loop_set_timer_context(&conn->timeout, conn); 289 hci_connection_timestamp(conn); 290 #endif 291 conn->acl_recombination_length = 0; 292 conn->acl_recombination_pos = 0; 293 conn->num_packets_sent = 0; 294 295 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 296 #ifdef ENABLE_BLE 297 conn->le_phy_update_all_phys = 0xff; 298 #endif 299 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 300 conn->le_max_tx_octets = 27; 301 #endif 302 #ifdef ENABLE_CLASSIC_PAIRING_OOB 303 conn->classic_oob_c_192 = NULL; 304 conn->classic_oob_r_192 = NULL; 305 conn->classic_oob_c_256 = NULL; 306 conn->classic_oob_r_256 = NULL; 307 #endif 308 } 309 310 /** 311 * create connection for given address 312 * 313 * @return connection OR NULL, if no memory left 314 */ 315 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 316 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 317 318 hci_connection_t * conn = btstack_memory_hci_connection_get(); 319 if (!conn) return NULL; 320 hci_connection_init(conn); 321 322 bd_addr_copy(conn->address, addr); 323 conn->address_type = addr_type; 324 conn->con_handle = HCI_CON_HANDLE_INVALID; 325 conn->role = HCI_ROLE_INVALID; 326 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 327 conn->le_past_sync_handle = HCI_CON_HANDLE_INVALID; 328 #endif 329 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 330 331 return conn; 332 } 333 334 335 /** 336 * get le connection parameter range 337 * 338 * @return le connection parameter range struct 339 */ 340 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 341 *range = hci_stack->le_connection_parameter_range; 342 } 343 344 /** 345 * set le connection parameter range 346 * 347 */ 348 349 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 350 hci_stack->le_connection_parameter_range = *range; 351 } 352 353 /** 354 * @brief Test if connection parameters are inside in existing rage 355 * @param conn_interval_min (unit: 1.25ms) 356 * @param conn_interval_max (unit: 1.25ms) 357 * @param conn_latency 358 * @param supervision_timeout (unit: 10ms) 359 * @return 1 if included 360 */ 361 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){ 362 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 363 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 364 365 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 366 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 367 368 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 369 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 370 371 return 1; 372 } 373 374 /** 375 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 376 * @note: default: 1 377 * @param max_peripheral_connections 378 */ 379 #ifdef ENABLE_LE_PERIPHERAL 380 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 381 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 382 } 383 #endif 384 385 /** 386 * get hci connections iterator 387 * 388 * @return hci connections iterator 389 */ 390 391 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 392 btstack_linked_list_iterator_init(it, &hci_stack->connections); 393 } 394 395 /** 396 * get connection for a given handle 397 * 398 * @return connection OR NULL, if not found 399 */ 400 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 401 btstack_linked_list_iterator_t it; 402 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 403 while (btstack_linked_list_iterator_has_next(&it)){ 404 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 405 if ( item->con_handle == con_handle ) { 406 return item; 407 } 408 } 409 return NULL; 410 } 411 412 /** 413 * get connection for given address 414 * 415 * @return connection OR NULL, if not found 416 */ 417 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 418 btstack_linked_list_iterator_t it; 419 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 420 while (btstack_linked_list_iterator_has_next(&it)){ 421 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 422 if (connection->address_type != addr_type) continue; 423 if (memcmp(addr, connection->address, 6) != 0) continue; 424 return connection; 425 } 426 return NULL; 427 } 428 429 #ifdef ENABLE_CLASSIC 430 431 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 432 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 433 } 434 435 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 436 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 437 } 438 439 #ifdef ENABLE_SCO_OVER_HCI 440 static int hci_number_sco_connections(void){ 441 int connections = 0; 442 btstack_linked_list_iterator_t it; 443 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 444 while (btstack_linked_list_iterator_has_next(&it)){ 445 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 446 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 447 connections++; 448 } 449 return connections; 450 } 451 #endif 452 453 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 454 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 455 #ifdef HAVE_EMBEDDED_TICK 456 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 457 // connections might be timed out 458 hci_emit_l2cap_check_timeout(connection); 459 } 460 #else 461 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 462 // connections might be timed out 463 hci_emit_l2cap_check_timeout(connection); 464 } 465 #endif 466 } 467 468 static void hci_connection_timestamp(hci_connection_t *connection){ 469 #ifdef HAVE_EMBEDDED_TICK 470 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 471 #else 472 connection->timestamp = btstack_run_loop_get_time_ms(); 473 #endif 474 } 475 476 /** 477 * add authentication flags and reset timer 478 * @note: assumes classic connection 479 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 480 */ 481 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 482 bd_addr_t addr; 483 reverse_bd_addr(bd_addr, addr); 484 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 485 if (conn) { 486 connectionSetAuthenticationFlags(conn, flags); 487 hci_connection_timestamp(conn); 488 } 489 } 490 491 static bool hci_pairing_active(hci_connection_t * hci_connection){ 492 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 493 } 494 495 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 496 if (hci_pairing_active(hci_connection)) return; 497 if (ssp){ 498 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 499 } else { 500 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 501 } 502 // if we are initiator, we have sent an HCI Authenticate Request 503 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 504 505 // if we are responder, use minimal service security level as required level 506 if (!initiator){ 507 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); 508 } 509 510 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 511 512 uint8_t event[12]; 513 event[0] = GAP_EVENT_PAIRING_STARTED; 514 event[1] = 10; 515 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 516 reverse_bd_addr(hci_connection->address, &event[4]); 517 event[10] = (uint8_t) ssp; 518 event[11] = (uint8_t) initiator; 519 hci_emit_event(event, sizeof(event), 1); 520 } 521 522 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 523 hci_connection->requested_security_level = LEVEL_0; 524 if (!hci_pairing_active(hci_connection)) return; 525 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 526 #ifdef ENABLE_CLASSIC_PAIRING_OOB 527 hci_connection->classic_oob_c_192 = NULL; 528 hci_connection->classic_oob_r_192 = NULL; 529 hci_connection->classic_oob_c_256 = NULL; 530 hci_connection->classic_oob_r_256 = NULL; 531 #endif 532 log_info("pairing complete, status %02x", status); 533 534 uint8_t event[11]; 535 event[0] = GAP_EVENT_PAIRING_COMPLETE; 536 event[1] = 9; 537 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 538 reverse_bd_addr(hci_connection->address, &event[4]); 539 event[10] = status; 540 hci_emit_event(event, sizeof(event), 1); 541 542 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 543 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 544 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 545 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 546 hci_connection->bonding_status = status; 547 } 548 } 549 550 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 551 hci_connection_t * conn = hci_connection_for_handle(handle); 552 if (!conn) return false; 553 return hci_pairing_active(conn); 554 } 555 556 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 557 if (!hci_stack->link_key_db) return; 558 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 559 hci_stack->link_key_db->delete_link_key(addr); 560 } 561 562 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 563 if (!hci_stack->link_key_db) return; 564 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 565 hci_stack->link_key_db->put_link_key(addr, link_key, type); 566 } 567 568 bool gap_get_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 false; 570 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 571 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 572 return result; 573 } 574 575 void gap_delete_all_link_keys(void){ 576 bd_addr_t addr; 577 link_key_t link_key; 578 link_key_type_t type; 579 btstack_link_key_iterator_t it; 580 int ok = gap_link_key_iterator_init(&it); 581 if (!ok) { 582 log_error("could not initialize iterator"); 583 return; 584 } 585 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 586 gap_drop_link_key_for_bd_addr(addr); 587 } 588 gap_link_key_iterator_done(&it); 589 } 590 591 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 592 if (!hci_stack->link_key_db) return 0; 593 if (!hci_stack->link_key_db->iterator_init) return 0; 594 return hci_stack->link_key_db->iterator_init(it); 595 } 596 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){ 597 if (!hci_stack->link_key_db) return 0; 598 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 599 } 600 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 601 if (!hci_stack->link_key_db) return; 602 hci_stack->link_key_db->iterator_done(it); 603 } 604 #endif 605 606 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 607 switch (address_type){ 608 case BD_ADDR_TYPE_LE_PUBLIC: 609 case BD_ADDR_TYPE_LE_RANDOM: 610 case BD_ADDR_TYPE_LE_PUBLIC_IDENTITY: 611 case BD_ADDR_TYPE_LE_RANDOM_IDENTITY: 612 return true; 613 default: 614 return false; 615 } 616 } 617 618 static int hci_is_le_connection(hci_connection_t * connection){ 619 return hci_is_le_connection_type(connection->address_type); 620 } 621 622 /** 623 * count connections 624 */ 625 static int nr_hci_connections(void){ 626 int count = 0; 627 btstack_linked_item_t *it; 628 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 629 count++; 630 } 631 return count; 632 } 633 634 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 635 636 unsigned int num_packets_sent_classic = 0; 637 unsigned int num_packets_sent_le = 0; 638 639 btstack_linked_item_t *it; 640 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 641 hci_connection_t * connection = (hci_connection_t *) it; 642 if (hci_is_le_connection(connection)){ 643 num_packets_sent_le += connection->num_packets_sent; 644 } 645 if (connection->address_type == BD_ADDR_TYPE_ACL){ 646 num_packets_sent_classic += connection->num_packets_sent; 647 } 648 } 649 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 650 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 651 int free_slots_le = 0; 652 653 if (free_slots_classic < 0){ 654 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); 655 return 0; 656 } 657 658 if (hci_stack->le_acl_packets_total_num){ 659 // if we have LE slots, they are used 660 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 661 if (free_slots_le < 0){ 662 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); 663 return 0; 664 } 665 } else { 666 // otherwise, classic slots are used for LE, too 667 free_slots_classic -= num_packets_sent_le; 668 if (free_slots_classic < 0){ 669 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); 670 return 0; 671 } 672 } 673 674 switch (address_type){ 675 case BD_ADDR_TYPE_UNKNOWN: 676 log_error("hci_number_free_acl_slots: unknown address type"); 677 return 0; 678 679 case BD_ADDR_TYPE_ACL: 680 return (uint16_t) free_slots_classic; 681 682 default: 683 if (hci_stack->le_acl_packets_total_num > 0){ 684 return (uint16_t) free_slots_le; 685 } 686 return (uint16_t) free_slots_classic; 687 } 688 } 689 690 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 691 // get connection type 692 hci_connection_t * connection = hci_connection_for_handle(con_handle); 693 if (!connection){ 694 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 695 return 0; 696 } 697 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 698 } 699 700 #ifdef ENABLE_CLASSIC 701 static int hci_number_free_sco_slots(void){ 702 unsigned int num_sco_packets_sent = 0; 703 btstack_linked_item_t *it; 704 if (hci_stack->synchronous_flow_control_enabled){ 705 // explicit flow control 706 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 707 hci_connection_t * connection = (hci_connection_t *) it; 708 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 709 num_sco_packets_sent += connection->num_packets_sent; 710 } 711 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 712 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 713 return 0; 714 } 715 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 716 } else { 717 // implicit flow control -- TODO 718 int num_ready = 0; 719 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 720 hci_connection_t * connection = (hci_connection_t *) it; 721 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 722 if (connection->sco_tx_ready == 0) continue; 723 num_ready++; 724 } 725 return num_ready; 726 } 727 } 728 #endif 729 730 // only used to send HCI Host Number Completed Packets 731 static int hci_can_send_comand_packet_transport(void){ 732 if (hci_stack->hci_packet_buffer_reserved) return 0; 733 734 // check for async hci transport implementations 735 if (hci_stack->hci_transport->can_send_packet_now){ 736 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 737 return 0; 738 } 739 } 740 return 1; 741 } 742 743 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 744 bool hci_can_send_command_packet_now(void){ 745 if (hci_can_send_comand_packet_transport() == 0) return false; 746 return hci_stack->num_cmd_packets > 0u; 747 } 748 749 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 750 // check for async hci transport implementations 751 if (!hci_stack->hci_transport->can_send_packet_now) return true; 752 return hci_stack->hci_transport->can_send_packet_now(packet_type); 753 } 754 755 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 756 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 757 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 758 } 759 760 bool hci_can_send_acl_le_packet_now(void){ 761 if (hci_stack->hci_packet_buffer_reserved) return false; 762 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 763 } 764 765 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 766 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 767 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 768 } 769 770 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 771 if (hci_stack->hci_packet_buffer_reserved) return false; 772 return hci_can_send_prepared_acl_packet_now(con_handle); 773 } 774 775 #ifdef ENABLE_CLASSIC 776 bool hci_can_send_acl_classic_packet_now(void){ 777 if (hci_stack->hci_packet_buffer_reserved) return false; 778 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 779 } 780 781 bool hci_can_send_prepared_sco_packet_now(void){ 782 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 783 if (hci_have_usb_transport()){ 784 return hci_stack->sco_can_send_now; 785 } else { 786 return hci_number_free_sco_slots() > 0; 787 } 788 } 789 790 bool hci_can_send_sco_packet_now(void){ 791 if (hci_stack->hci_packet_buffer_reserved) return false; 792 return hci_can_send_prepared_sco_packet_now(); 793 } 794 795 void hci_request_sco_can_send_now_event(void){ 796 hci_stack->sco_waiting_for_can_send_now = 1; 797 hci_notify_if_sco_can_send_now(); 798 } 799 #endif 800 801 // used for internal checks in l2cap.c 802 bool hci_is_packet_buffer_reserved(void){ 803 return hci_stack->hci_packet_buffer_reserved; 804 } 805 806 // reserves outgoing packet buffer. 807 // @return 1 if successful 808 bool hci_reserve_packet_buffer(void){ 809 if (hci_stack->hci_packet_buffer_reserved) { 810 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 811 return false; 812 } 813 hci_stack->hci_packet_buffer_reserved = true; 814 return true; 815 } 816 817 void hci_release_packet_buffer(void){ 818 hci_stack->hci_packet_buffer_reserved = false; 819 } 820 821 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 822 static int hci_transport_synchronous(void){ 823 return hci_stack->hci_transport->can_send_packet_now == NULL; 824 } 825 826 // used for debugging 827 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 828 static void hci_controller_dump_packets(void){ 829 // format: "{handle:04x}:{count:02d} " 830 char summaries[3][7 * 8 + 1]; 831 uint16_t totals[3]; 832 uint8_t index; 833 for (index = 0 ; index < 3 ; index++){ 834 summaries[index][0] = 0; 835 totals[index] = 0; 836 } 837 btstack_linked_item_t *it; 838 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 839 hci_connection_t * connection = (hci_connection_t *) it; 840 switch (connection->address_type){ 841 case BD_ADDR_TYPE_ACL: 842 index = 0; 843 break; 844 case BD_ADDR_TYPE_SCO: 845 index = 2; 846 break; 847 default: 848 index = 1; 849 break; 850 } 851 totals[index] += connection->num_packets_sent; 852 char item_text[10]; 853 sprintf(item_text, "%04x:%02d ", connection->con_handle,connection->num_packets_sent); 854 btstack_strcat(summaries[index], sizeof(summaries[0]), item_text); 855 } 856 for (index = 0 ; index < 3 ; index++){ 857 if (summaries[index][0] == 0){ 858 summaries[index][0] = '-'; 859 summaries[index][1] = 0; 860 } 861 } 862 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]); 863 } 864 #endif 865 866 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 867 868 // 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); 869 870 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 871 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 872 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 873 max_acl_data_packet_length = hci_stack->le_data_packets_length; 874 } 875 876 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 877 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 878 max_acl_data_packet_length = connection->le_max_tx_octets; 879 } 880 #endif 881 882 log_debug("hci_send_acl_packet_fragments entered"); 883 884 uint8_t status = ERROR_CODE_SUCCESS; 885 // multiple packets could be send on a synchronous HCI transport 886 while (true){ 887 888 log_debug("hci_send_acl_packet_fragments loop entered"); 889 890 // get current data 891 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 892 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 893 bool more_fragments = false; 894 895 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 896 if (current_acl_data_packet_length > max_acl_data_packet_length){ 897 more_fragments = true; 898 current_acl_data_packet_length = max_acl_data_packet_length & (~(HCI_ACL_CHUNK_SIZE_ALIGNMENT-1)); 899 } 900 901 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 902 if (acl_header_pos > 0u){ 903 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 904 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 905 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 906 } 907 908 // update header len 909 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 910 911 // count packet 912 connection->num_packets_sent++; 913 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 914 915 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 916 if (more_fragments){ 917 // update start of next fragment to send 918 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 919 } else { 920 // done 921 hci_stack->acl_fragmentation_pos = 0; 922 hci_stack->acl_fragmentation_total_size = 0; 923 } 924 925 // send packet 926 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 927 const int size = current_acl_data_packet_length + 4; 928 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 929 hci_stack->acl_fragmentation_tx_active = 1; 930 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 931 if (err != 0){ 932 // no error from HCI Transport expected 933 status = ERROR_CODE_HARDWARE_FAILURE; 934 } 935 936 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 937 hci_controller_dump_packets(); 938 #endif 939 940 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 941 942 // done yet? 943 if (!more_fragments) break; 944 945 // can send more? 946 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 947 } 948 949 log_debug("hci_send_acl_packet_fragments loop over"); 950 951 // release buffer now for synchronous transport 952 if (hci_transport_synchronous()){ 953 hci_stack->acl_fragmentation_tx_active = 0; 954 hci_release_packet_buffer(); 955 hci_emit_transport_packet_sent(); 956 } 957 958 return status; 959 } 960 961 // pre: caller has reserved the packet buffer 962 uint8_t hci_send_acl_packet_buffer(int size){ 963 btstack_assert(hci_stack->hci_packet_buffer_reserved); 964 965 uint8_t * packet = hci_stack->hci_packet_buffer; 966 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 967 968 // check for free places on Bluetooth module 969 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 970 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 971 hci_release_packet_buffer(); 972 hci_emit_transport_packet_sent(); 973 return BTSTACK_ACL_BUFFERS_FULL; 974 } 975 976 hci_connection_t *connection = hci_connection_for_handle( con_handle); 977 if (!connection) { 978 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 979 hci_release_packet_buffer(); 980 hci_emit_transport_packet_sent(); 981 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 982 } 983 984 #ifdef ENABLE_CLASSIC 985 hci_connection_timestamp(connection); 986 #endif 987 988 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 989 990 // setup data 991 hci_stack->acl_fragmentation_total_size = size; 992 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 993 994 return hci_send_acl_packet_fragments(connection); 995 } 996 997 #ifdef ENABLE_CLASSIC 998 // pre: caller has reserved the packet buffer 999 uint8_t hci_send_sco_packet_buffer(int size){ 1000 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1001 1002 uint8_t * packet = hci_stack->hci_packet_buffer; 1003 1004 // skip checks in loopback mode 1005 if (!hci_stack->loopback_mode){ 1006 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 1007 1008 // check for free places on Bluetooth module 1009 if (!hci_can_send_prepared_sco_packet_now()) { 1010 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 1011 hci_release_packet_buffer(); 1012 hci_emit_transport_packet_sent(); 1013 return BTSTACK_ACL_BUFFERS_FULL; 1014 } 1015 1016 // track send packet in connection struct 1017 hci_connection_t *connection = hci_connection_for_handle( con_handle); 1018 if (!connection) { 1019 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 1020 hci_release_packet_buffer(); 1021 hci_emit_transport_packet_sent(); 1022 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1023 } 1024 1025 if (hci_have_usb_transport()){ 1026 // token used 1027 hci_stack->sco_can_send_now = false; 1028 } else { 1029 if (hci_stack->synchronous_flow_control_enabled){ 1030 connection->num_packets_sent++; 1031 } else { 1032 connection->sco_tx_ready--; 1033 } 1034 } 1035 } 1036 1037 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 1038 1039 #ifdef HAVE_SCO_TRANSPORT 1040 hci_stack->sco_transport->send_packet(packet, size); 1041 hci_release_packet_buffer(); 1042 hci_emit_transport_packet_sent(); 1043 1044 return 0; 1045 #else 1046 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 1047 if (hci_transport_synchronous()){ 1048 hci_release_packet_buffer(); 1049 hci_emit_transport_packet_sent(); 1050 } 1051 1052 if (err != 0){ 1053 return ERROR_CODE_HARDWARE_FAILURE; 1054 } 1055 return ERROR_CODE_SUCCESS; 1056 #endif 1057 } 1058 #endif 1059 1060 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 1061 static uint8_t hci_send_iso_packet_fragments(void){ 1062 1063 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 1064 uint8_t status = ERROR_CODE_SUCCESS; 1065 // multiple packets could be send on a synchronous HCI transport 1066 while (true){ 1067 1068 // get current data 1069 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 1070 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 1071 bool more_fragments = false; 1072 1073 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 1074 if (current_iso_data_packet_length > max_iso_data_packet_length){ 1075 more_fragments = true; 1076 current_iso_data_packet_length = max_iso_data_packet_length; 1077 } 1078 1079 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1080 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1081 uint8_t pb_flags; 1082 if (iso_header_pos == 0u){ 1083 // first fragment, keep TS field 1084 pb_flags = more_fragments ? 0x00 : 0x02; 1085 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1086 } else { 1087 // later fragment, drop TS field 1088 pb_flags = more_fragments ? 0x01 : 0x03; 1089 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1090 } 1091 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1092 1093 // update header len 1094 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1095 1096 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1097 if (more_fragments){ 1098 // update start of next fragment to send 1099 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1100 } else { 1101 // done 1102 hci_stack->iso_fragmentation_pos = 0; 1103 hci_stack->iso_fragmentation_total_size = 0; 1104 } 1105 1106 // send packet 1107 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1108 const int size = current_iso_data_packet_length + 4; 1109 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1110 hci_stack->iso_fragmentation_tx_active = true; 1111 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1112 if (err != 0){ 1113 // no error from HCI Transport expected 1114 status = ERROR_CODE_HARDWARE_FAILURE; 1115 } 1116 1117 // done yet? 1118 if (!more_fragments) break; 1119 1120 // can send more? 1121 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1122 } 1123 1124 // release buffer now for synchronous transport 1125 if (hci_transport_synchronous()){ 1126 hci_stack->iso_fragmentation_tx_active = false; 1127 hci_release_packet_buffer(); 1128 hci_emit_transport_packet_sent(); 1129 } 1130 1131 return status; 1132 } 1133 1134 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1135 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1136 1137 hci_con_handle_t con_handle = (hci_con_handle_t) little_endian_read_16(hci_stack->hci_packet_buffer, 0) & 0xfff; 1138 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(con_handle); 1139 if (iso_stream == NULL){ 1140 hci_release_packet_buffer(); 1141 hci_iso_notify_can_send_now(); 1142 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1143 } 1144 1145 // TODO: check for space on controller 1146 1147 // skip iso packets if needed 1148 if (iso_stream->num_packets_to_skip > 0){ 1149 iso_stream->num_packets_to_skip--; 1150 // pretend it was processed and trigger next one 1151 hci_release_packet_buffer(); 1152 hci_iso_notify_can_send_now(); 1153 return ERROR_CODE_SUCCESS; 1154 } 1155 1156 // track outgoing packet sent 1157 log_info("Outgoing ISO packet for con handle 0x%04x", con_handle); 1158 iso_stream->num_packets_sent++; 1159 1160 // setup data 1161 hci_stack->iso_fragmentation_total_size = size; 1162 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1163 1164 return hci_send_iso_packet_fragments(); 1165 } 1166 #endif 1167 1168 static void acl_handler(uint8_t *packet, uint16_t size){ 1169 1170 // get info 1171 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1172 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1173 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1174 uint16_t acl_length = READ_ACL_LENGTH(packet); 1175 1176 // ignore non-registered handle 1177 if (!conn){ 1178 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1179 return; 1180 } 1181 1182 // assert packet is complete 1183 if ((acl_length + 4u) != size){ 1184 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1185 return; 1186 } 1187 1188 #ifdef ENABLE_CLASSIC 1189 // update idle timestamp 1190 hci_connection_timestamp(conn); 1191 #endif 1192 1193 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1194 hci_stack->host_completed_packets = 1; 1195 conn->num_packets_completed++; 1196 #endif 1197 1198 // handle different packet types 1199 switch (acl_flags & 0x03u) { 1200 1201 case 0x01: // continuation fragment 1202 1203 // sanity checks 1204 if (conn->acl_recombination_pos == 0u) { 1205 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1206 return; 1207 } 1208 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1209 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1210 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1211 conn->acl_recombination_pos = 0; 1212 return; 1213 } 1214 1215 // append fragment payload (header already stored) 1216 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1217 &packet[4], acl_length); 1218 conn->acl_recombination_pos += acl_length; 1219 1220 // forward complete L2CAP packet if complete. 1221 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1222 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1223 // reset recombination buffer 1224 conn->acl_recombination_length = 0; 1225 conn->acl_recombination_pos = 0; 1226 } 1227 break; 1228 1229 case 0x02: { // first fragment 1230 1231 // sanity check 1232 if (conn->acl_recombination_pos) { 1233 // we just received the first fragment, but still have data. Only warn if the packet wasn't a flushable packet 1234 if ((conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE+1] >> 4) != 0x02){ 1235 log_error( "ACL First Fragment but %u bytes in buffer for handle 0x%02x, dropping stale fragments", conn->acl_recombination_pos, con_handle); 1236 } 1237 conn->acl_recombination_pos = 0; 1238 } 1239 1240 // peek into L2CAP packet! 1241 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1242 1243 // compare fragment size to L2CAP packet size 1244 if (acl_length >= (l2cap_length + 4u)){ 1245 // forward fragment as L2CAP packet 1246 hci_emit_acl_packet(packet, acl_length + 4u); 1247 } else { 1248 1249 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1250 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1251 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1252 return; 1253 } 1254 1255 // store first fragment and tweak acl length for complete package 1256 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1257 packet, acl_length + 4u); 1258 conn->acl_recombination_pos = acl_length + 4u; 1259 conn->acl_recombination_length = l2cap_length; 1260 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1261 } 1262 break; 1263 1264 } 1265 default: 1266 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1267 return; 1268 } 1269 1270 // execute main loop 1271 hci_run(); 1272 } 1273 1274 static void hci_connection_stop_timer(hci_connection_t * conn){ 1275 btstack_run_loop_remove_timer(&conn->timeout); 1276 #ifdef ENABLE_CLASSIC 1277 btstack_run_loop_remove_timer(&conn->timeout_sco); 1278 #endif 1279 } 1280 1281 static void hci_shutdown_connection(hci_connection_t *conn){ 1282 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1283 1284 #ifdef ENABLE_CLASSIC 1285 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1286 bd_addr_type_t addr_type = conn->address_type; 1287 #endif 1288 #ifdef HAVE_SCO_TRANSPORT 1289 hci_con_handle_t con_handle = conn->con_handle; 1290 #endif 1291 #endif 1292 1293 hci_connection_stop_timer(conn); 1294 1295 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1296 btstack_memory_hci_connection_free( conn ); 1297 1298 // now it's gone 1299 hci_emit_nr_connections_changed(); 1300 1301 #ifdef ENABLE_CLASSIC 1302 #ifdef ENABLE_SCO_OVER_HCI 1303 // update SCO 1304 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1305 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1306 } 1307 #endif 1308 #ifdef HAVE_SCO_TRANSPORT 1309 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1310 hci_stack->sco_transport->close(con_handle); 1311 } 1312 #endif 1313 #endif 1314 } 1315 1316 #ifdef ENABLE_CLASSIC 1317 1318 static const uint16_t packet_type_sizes[] = { 1319 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1320 HCI_ACL_DH1_SIZE, 0, 0, 0, 1321 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1322 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1323 }; 1324 static const uint8_t packet_type_feature_requirement_bit[] = { 1325 0, // 3 slot packets 1326 1, // 5 slot packets 1327 25, // EDR 2 mpbs 1328 26, // EDR 3 mbps 1329 39, // 3 slot EDR packts 1330 40, // 5 slot EDR packet 1331 }; 1332 static const uint16_t packet_type_feature_packet_mask[] = { 1333 0x0f00, // 3 slot packets 1334 0xf000, // 5 slot packets 1335 0x1102, // EDR 2 mpbs 1336 0x2204, // EDR 3 mbps 1337 0x0300, // 3 slot EDR packts 1338 0x3000, // 5 slot EDR packet 1339 }; 1340 1341 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1342 // enable packet types based on size 1343 uint16_t packet_types = 0; 1344 unsigned int i; 1345 for (i=0;i<16;i++){ 1346 if (packet_type_sizes[i] == 0) continue; 1347 if (packet_type_sizes[i] <= buffer_size){ 1348 packet_types |= 1 << i; 1349 } 1350 } 1351 // disable packet types due to missing local supported features 1352 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1353 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1354 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1355 if (feature_set) continue; 1356 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1357 packet_types &= ~packet_type_feature_packet_mask[i]; 1358 } 1359 // flip bits for "may not be used" 1360 packet_types ^= 0x3306; 1361 return packet_types; 1362 } 1363 1364 uint16_t hci_usable_acl_packet_types(void){ 1365 return hci_stack->packet_types; 1366 } 1367 #endif 1368 1369 uint8_t* hci_get_outgoing_packet_buffer(void){ 1370 // hci packet buffer is >= acl data packet length 1371 return hci_stack->hci_packet_buffer; 1372 } 1373 1374 uint16_t hci_max_acl_data_packet_length(void){ 1375 return hci_stack->acl_data_packet_length; 1376 } 1377 1378 #ifdef ENABLE_CLASSIC 1379 bool hci_extended_sco_link_supported(void){ 1380 // No. 31, byte 3, bit 7 1381 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1382 } 1383 #endif 1384 1385 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1386 // No. 54, byte 6, bit 6 1387 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1388 } 1389 1390 #ifdef ENABLE_CLASSIC 1391 static int gap_ssp_supported(void){ 1392 // No. 51, byte 6, bit 3 1393 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1394 } 1395 #endif 1396 1397 static int hci_classic_supported(void){ 1398 #ifdef ENABLE_CLASSIC 1399 // No. 37, byte 4, bit 5, = No BR/EDR Support 1400 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1401 #else 1402 return 0; 1403 #endif 1404 } 1405 1406 static int hci_le_supported(void){ 1407 #ifdef ENABLE_BLE 1408 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1409 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1410 #else 1411 return 0; 1412 #endif 1413 } 1414 1415 static bool hci_command_supported(uint8_t command_index){ 1416 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1417 } 1418 1419 #ifdef ENABLE_BLE 1420 1421 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1422 static bool hci_extended_advertising_supported(void){ 1423 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1424 } 1425 #endif 1426 1427 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1428 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1429 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1430 } else { 1431 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1432 } 1433 } 1434 1435 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1436 *addr_type = hci_stack->le_own_addr_type; 1437 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1438 } 1439 1440 #ifdef ENABLE_LE_PERIPHERAL 1441 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1442 *addr_type = hci_stack->le_advertisements_own_addr_type; 1443 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1444 }; 1445 #endif 1446 1447 #ifdef ENABLE_LE_CENTRAL 1448 1449 /** 1450 * @brief Get own addr type and address used for LE connections (Central) 1451 */ 1452 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1453 *addr_type = hci_stack->le_connection_own_addr_type; 1454 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1455 } 1456 1457 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1458 1459 uint16_t offset = 3; 1460 uint8_t num_reports = packet[offset]; 1461 offset += 1; 1462 1463 uint16_t i; 1464 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1465 for (i=0; (i<num_reports) && (offset < size);i++){ 1466 // sanity checks on data_length: 1467 uint8_t data_length = packet[offset + 8]; 1468 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1469 if ((offset + 9u + data_length + 1u) > size) return; 1470 // setup event 1471 uint8_t event_size = 10u + data_length; 1472 uint16_t pos = 0; 1473 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1474 event[pos++] = event_size; 1475 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1476 offset += 8; 1477 pos += 8; 1478 event[pos++] = packet[offset + 1 + data_length]; // rssi 1479 event[pos++] = data_length; 1480 offset++; 1481 (void)memcpy(&event[pos], &packet[offset], data_length); 1482 pos += data_length; 1483 offset += data_length + 1u; // rssi 1484 hci_emit_event(event, pos, 1); 1485 } 1486 } 1487 1488 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1489 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1490 uint16_t offset = 3; 1491 uint8_t num_reports = packet[offset++]; 1492 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1493 uint8_t i; 1494 for (i=0; (i<num_reports) && (offset < size);i++){ 1495 // sanity checks on data_length: 1496 uint16_t data_length = packet[offset + 23]; 1497 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1498 if ((offset + 24u + data_length) > size) return; 1499 uint16_t event_type = little_endian_read_16(packet, offset); 1500 offset += 2; 1501 if ((event_type & 0x10) != 0) { 1502 // setup legacy event 1503 uint8_t legacy_event_type; 1504 switch (event_type){ 1505 case 0b0010011: 1506 // ADV_IND 1507 legacy_event_type = 0; 1508 break; 1509 case 0b0010101: 1510 // ADV_DIRECT_IND 1511 legacy_event_type = 1; 1512 break; 1513 case 0b0010010: 1514 // ADV_SCAN_IND 1515 legacy_event_type = 2; 1516 break; 1517 case 0b0010000: 1518 // ADV_NONCONN_IND 1519 legacy_event_type = 3; 1520 break; 1521 case 0b0011011: 1522 case 0b0011010: 1523 // SCAN_RSP 1524 legacy_event_type = 4; 1525 break; 1526 default: 1527 legacy_event_type = 0; 1528 break; 1529 } 1530 uint16_t pos = 0; 1531 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1532 event[pos++] = 10u + data_length; 1533 event[pos++] = legacy_event_type; 1534 // copy address type + address 1535 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1536 offset += 7; 1537 pos += 7; 1538 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1539 offset += 4; 1540 // copy rssi 1541 event[pos++] = packet[offset++]; 1542 // skip periodic advertising interval and direct address 1543 offset += 9; 1544 // copy data len + data; 1545 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1546 pos += 1 +data_length; 1547 offset += 1+ data_length; 1548 hci_emit_event(event, pos, 1); 1549 } else { 1550 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1551 uint8_t report_len = 24 + data_length; 1552 event[1] = report_len; 1553 little_endian_store_16(event, 2, event_type); 1554 memcpy(&event[4], &packet[offset], report_len); 1555 offset += report_len; 1556 hci_emit_event(event, 2 + report_len, 1); 1557 } 1558 } 1559 } 1560 #endif 1561 1562 #endif 1563 #endif 1564 1565 #ifdef ENABLE_BLE 1566 #ifdef ENABLE_LE_PERIPHERAL 1567 static void hci_update_advertisements_enabled_for_current_roles(void){ 1568 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1569 // get number of active le slave connections 1570 int num_slave_connections = 0; 1571 btstack_linked_list_iterator_t it; 1572 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1573 while (btstack_linked_list_iterator_has_next(&it)){ 1574 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1575 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1576 if (con->state != OPEN) continue; 1577 if (con->role != HCI_ROLE_SLAVE) continue; 1578 if (!hci_is_le_connection(con)) continue; 1579 num_slave_connections++; 1580 } 1581 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1582 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1583 } else { 1584 hci_stack->le_advertisements_enabled_for_current_roles = false; 1585 } 1586 } 1587 #endif 1588 #endif 1589 1590 #ifdef ENABLE_CLASSIC 1591 static void gap_run_set_local_name(void){ 1592 hci_reserve_packet_buffer(); 1593 uint8_t * packet = hci_stack->hci_packet_buffer; 1594 // construct HCI Command and send 1595 uint16_t opcode = hci_write_local_name.opcode; 1596 hci_stack->last_cmd_opcode = opcode; 1597 packet[0] = opcode & 0xff; 1598 packet[1] = opcode >> 8; 1599 packet[2] = DEVICE_NAME_LEN; 1600 memset(&packet[3], 0, DEVICE_NAME_LEN); 1601 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1602 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1603 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1604 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1605 // expand '00:00:00:00:00:00' in name with bd_addr 1606 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1607 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1608 } 1609 1610 static void gap_run_set_eir_data(void){ 1611 hci_reserve_packet_buffer(); 1612 uint8_t * packet = hci_stack->hci_packet_buffer; 1613 // construct HCI Command in-place and send 1614 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1615 hci_stack->last_cmd_opcode = opcode; 1616 uint16_t offset = 0; 1617 packet[offset++] = opcode & 0xff; 1618 packet[offset++] = opcode >> 8; 1619 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1620 packet[offset++] = 0; // FEC not required 1621 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1622 if (hci_stack->eir_data){ 1623 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1624 ad_context_t context; 1625 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1626 uint8_t data_type = ad_iterator_get_data_type(&context); 1627 uint8_t size = ad_iterator_get_data_len(&context); 1628 const uint8_t *data = ad_iterator_get_data(&context); 1629 // copy item 1630 packet[offset++] = size + 1; 1631 packet[offset++] = data_type; 1632 memcpy(&packet[offset], data, size); 1633 // update name item 1634 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1635 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1636 } 1637 offset += size; 1638 } 1639 } else { 1640 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1641 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1642 packet[offset++] = bytes_to_copy + 1; 1643 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1644 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1645 // expand '00:00:00:00:00:00' in name with bd_addr 1646 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1647 } 1648 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1649 } 1650 1651 static void hci_run_gap_tasks_classic(void){ 1652 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1653 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1654 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1655 return; 1656 } 1657 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1658 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1659 gap_run_set_local_name(); 1660 return; 1661 } 1662 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1663 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1664 gap_run_set_eir_data(); 1665 return; 1666 } 1667 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1668 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1669 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1670 return; 1671 } 1672 // write page scan activity 1673 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1674 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1675 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1676 return; 1677 } 1678 // write page scan type 1679 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1680 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1681 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1682 return; 1683 } 1684 // write page timeout 1685 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1686 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1687 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1688 return; 1689 } 1690 // send scan enable 1691 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1692 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1693 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1694 return; 1695 } 1696 // send write scan activity 1697 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1698 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1699 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1700 return; 1701 } 1702 } 1703 #endif 1704 1705 #ifndef HAVE_HOST_CONTROLLER_API 1706 1707 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1708 if (!hci_stack->config) return 0; 1709 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1710 // Limit baud rate for Broadcom chipsets to 3 mbps 1711 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1712 baud_rate = 3000000; 1713 } 1714 return baud_rate; 1715 } 1716 1717 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1718 UNUSED(ds); 1719 1720 switch (hci_stack->substate){ 1721 case HCI_INIT_W4_SEND_RESET: 1722 log_info("Resend HCI Reset"); 1723 hci_stack->substate = HCI_INIT_SEND_RESET; 1724 hci_stack->num_cmd_packets = 1; 1725 hci_run(); 1726 break; 1727 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1728 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1729 if (hci_stack->hci_transport->reset_link){ 1730 hci_stack->hci_transport->reset_link(); 1731 } 1732 1733 /* fall through */ 1734 1735 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1736 log_info("Resend HCI Reset - CSR Warm Boot"); 1737 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1738 hci_stack->num_cmd_packets = 1; 1739 hci_run(); 1740 break; 1741 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1742 if (hci_stack->hci_transport->set_baudrate){ 1743 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1744 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1745 hci_stack->hci_transport->set_baudrate(baud_rate); 1746 } 1747 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1748 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1749 if (hci_stack->hci_transport->reset_link){ 1750 log_info("Link Reset"); 1751 hci_stack->hci_transport->reset_link(); 1752 } 1753 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1754 hci_run(); 1755 } 1756 break; 1757 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1758 // otherwise continue 1759 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1760 hci_send_cmd(&hci_read_local_supported_commands); 1761 break; 1762 default: 1763 break; 1764 } 1765 } 1766 #endif 1767 1768 static void hci_initializing_next_state(void){ 1769 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1770 } 1771 1772 static void hci_init_done(void){ 1773 // done. tell the app 1774 log_info("hci_init_done -> HCI_STATE_WORKING"); 1775 hci_stack->state = HCI_STATE_WORKING; 1776 hci_emit_state(); 1777 } 1778 1779 // assumption: hci_can_send_command_packet_now() == true 1780 static void hci_initializing_run(void){ 1781 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1782 1783 if (!hci_can_send_command_packet_now()) return; 1784 1785 #ifndef HAVE_HOST_CONTROLLER_API 1786 bool need_baud_change = hci_stack->config 1787 && hci_stack->chipset 1788 && hci_stack->chipset->set_baudrate_command 1789 && hci_stack->hci_transport->set_baudrate 1790 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1791 #endif 1792 1793 switch (hci_stack->substate){ 1794 case HCI_INIT_SEND_RESET: 1795 hci_state_reset(); 1796 1797 #ifndef HAVE_HOST_CONTROLLER_API 1798 // prepare reset if command complete not received in 100ms 1799 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1800 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1801 btstack_run_loop_add_timer(&hci_stack->timeout); 1802 #endif 1803 // send command 1804 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1805 hci_send_cmd(&hci_reset); 1806 break; 1807 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1808 hci_send_cmd(&hci_read_local_version_information); 1809 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1810 break; 1811 1812 #ifndef HAVE_HOST_CONTROLLER_API 1813 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1814 hci_state_reset(); 1815 // prepare reset if command complete not received in 100ms 1816 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1817 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1818 btstack_run_loop_add_timer(&hci_stack->timeout); 1819 // send command 1820 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1821 hci_send_cmd(&hci_reset); 1822 break; 1823 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1824 hci_state_reset(); 1825 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1826 hci_send_cmd(&hci_reset); 1827 break; 1828 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1829 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1830 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1831 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1832 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1833 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1834 break; 1835 } 1836 case HCI_INIT_SET_BD_ADDR: 1837 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1838 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1839 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1840 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1841 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1842 break; 1843 case HCI_INIT_SEND_READ_LOCAL_NAME: 1844 #ifdef ENABLE_CLASSIC 1845 hci_send_cmd(&hci_read_local_name); 1846 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1847 break; 1848 #endif 1849 /* fall through */ 1850 1851 case HCI_INIT_SEND_BAUD_CHANGE: 1852 if (need_baud_change) { 1853 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1854 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1855 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1856 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1857 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1858 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1859 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1860 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1861 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1862 btstack_run_loop_add_timer(&hci_stack->timeout); 1863 } 1864 break; 1865 } 1866 1867 /* fall through */ 1868 1869 case HCI_INIT_CUSTOM_INIT: 1870 // Custom initialization 1871 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1872 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1873 bool send_cmd = false; 1874 switch (hci_stack->chipset_result){ 1875 case BTSTACK_CHIPSET_VALID_COMMAND: 1876 send_cmd = true; 1877 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1878 break; 1879 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1880 send_cmd = true; 1881 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1882 log_info("CSR Warm Boot"); 1883 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1884 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1885 btstack_run_loop_add_timer(&hci_stack->timeout); 1886 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1887 && hci_stack->config 1888 && hci_stack->chipset 1889 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1890 && hci_stack->hci_transport->set_baudrate 1891 && hci_transport_uart_get_main_baud_rate()){ 1892 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1893 } else { 1894 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1895 } 1896 break; 1897 default: 1898 break; 1899 } 1900 1901 if (send_cmd){ 1902 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1903 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1904 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1905 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1906 break; 1907 } 1908 log_info("Init script done"); 1909 1910 // Init script download on Broadcom chipsets causes: 1911 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1912 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1913 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1914 1915 // - baud rate to reset, restore UART baud rate if needed 1916 if (need_baud_change) { 1917 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1918 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1919 hci_stack->hci_transport->set_baudrate(baud_rate); 1920 } 1921 1922 uint16_t bcm_delay_ms = 300; 1923 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1924 // -> Work around: wait here. 1925 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1926 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1927 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1928 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1929 btstack_run_loop_add_timer(&hci_stack->timeout); 1930 break; 1931 } 1932 } 1933 #endif 1934 /* fall through */ 1935 1936 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1937 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1938 hci_send_cmd(&hci_read_local_supported_commands); 1939 break; 1940 case HCI_INIT_READ_BD_ADDR: 1941 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1942 hci_send_cmd(&hci_read_bd_addr); 1943 break; 1944 case HCI_INIT_READ_BUFFER_SIZE: 1945 // only read buffer size if supported 1946 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1947 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1948 hci_send_cmd(&hci_read_buffer_size); 1949 break; 1950 } 1951 1952 /* fall through */ 1953 1954 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1955 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1956 hci_send_cmd(&hci_read_local_supported_features); 1957 break; 1958 1959 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1960 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1961 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1962 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1963 break; 1964 case HCI_INIT_HOST_BUFFER_SIZE: 1965 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1966 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1967 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1968 break; 1969 #endif 1970 1971 case HCI_INIT_SET_EVENT_MASK: 1972 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1973 if (hci_le_supported()){ 1974 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1975 } else { 1976 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1977 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1978 } 1979 break; 1980 1981 case HCI_INIT_SET_EVENT_MASK_2: 1982 // On Bluettooth PTS dongle (BL 654) with PacketCraft HCI Firmware (LMP subversion) 0x5244, 1983 // setting Event Mask 2 causes Controller to drop Encryption Change events. 1984 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2) 1985 && (hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_PACKETCRAFT_INC)){ 1986 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1987 // Encryption Change Event v2 - bit 25 1988 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1989 break; 1990 } 1991 1992 #ifdef ENABLE_CLASSIC 1993 /* fall through */ 1994 1995 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1996 if (hci_classic_supported() && gap_ssp_supported()){ 1997 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1998 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1999 break; 2000 } 2001 2002 /* fall through */ 2003 2004 case HCI_INIT_WRITE_INQUIRY_MODE: 2005 if (hci_classic_supported()){ 2006 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 2007 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 2008 break; 2009 } 2010 2011 /* fall through */ 2012 2013 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 2014 // skip write secure connections host support if not supported or disabled 2015 if (hci_classic_supported() && hci_stack->secure_connections_enable 2016 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 2017 hci_stack->secure_connections_active = true; 2018 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 2019 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 2020 break; 2021 } 2022 2023 /* fall through */ 2024 2025 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 2026 // skip set min encryption key size 2027 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 2028 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 2029 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 2030 break; 2031 } 2032 2033 #ifdef ENABLE_SCO_OVER_HCI 2034 /* fall through */ 2035 2036 // only sent if ENABLE_SCO_OVER_HCI is defined 2037 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2038 // skip write synchronous flow control if not supported 2039 if (hci_classic_supported() 2040 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 2041 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2042 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 2043 break; 2044 } 2045 /* fall through */ 2046 2047 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2048 // skip write default erroneous data reporting if not supported 2049 if (hci_classic_supported() 2050 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 2051 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2052 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 2053 break; 2054 } 2055 #endif 2056 2057 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 2058 /* fall through */ 2059 2060 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 2061 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 2062 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2063 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 2064 #ifdef ENABLE_SCO_OVER_HCI 2065 log_info("BCM: Route SCO data via HCI transport"); 2066 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 2067 #endif 2068 #ifdef ENABLE_SCO_OVER_PCM 2069 log_info("BCM: Route SCO data via PCM interface"); 2070 #ifdef ENABLE_BCM_PCM_WBS 2071 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 2072 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 2073 #else 2074 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2075 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 2076 #endif 2077 #endif 2078 break; 2079 } 2080 #endif 2081 2082 #ifdef ENABLE_SCO_OVER_PCM 2083 /* fall through */ 2084 2085 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2086 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2087 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2088 log_info("BCM: Config PCM interface for I2S"); 2089 #ifdef ENABLE_BCM_PCM_WBS 2090 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 2091 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 2092 #else 2093 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2094 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 2095 #endif 2096 break; 2097 } 2098 #endif 2099 #endif 2100 2101 #ifdef ENABLE_BLE 2102 /* fall through */ 2103 2104 // LE INIT 2105 case HCI_INIT_LE_READ_BUFFER_SIZE: 2106 if (hci_le_supported()){ 2107 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2108 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2109 hci_send_cmd(&hci_le_read_buffer_size_v2); 2110 } else { 2111 hci_send_cmd(&hci_le_read_buffer_size); 2112 } 2113 break; 2114 } 2115 2116 /* fall through */ 2117 2118 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2119 // skip write le host if not supported (e.g. on LE only EM9301) 2120 if (hci_le_supported() 2121 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2122 // LE Supported Host = 1, Simultaneous Host = 0 2123 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2124 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2125 break; 2126 } 2127 2128 /* fall through */ 2129 2130 case HCI_INIT_LE_SET_EVENT_MASK: 2131 if (hci_le_supported()){ 2132 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2133 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2134 break; 2135 } 2136 #endif 2137 2138 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2139 /* fall through */ 2140 2141 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2142 if (hci_le_supported() 2143 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2144 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2145 hci_send_cmd(&hci_le_read_maximum_data_length); 2146 break; 2147 } 2148 2149 /* fall through */ 2150 2151 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2152 if (hci_le_supported() 2153 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2154 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2155 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2156 break; 2157 } 2158 #endif 2159 2160 #ifdef ENABLE_LE_CENTRAL 2161 /* fall through */ 2162 2163 case HCI_INIT_READ_WHITE_LIST_SIZE: 2164 if (hci_le_supported()){ 2165 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2166 hci_send_cmd(&hci_le_read_white_list_size); 2167 break; 2168 } 2169 2170 #endif 2171 2172 #ifdef ENABLE_LE_PERIPHERAL 2173 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2174 /* fall through */ 2175 2176 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2177 if (hci_extended_advertising_supported()){ 2178 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2179 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2180 break; 2181 } 2182 #endif 2183 #endif 2184 /* fall through */ 2185 2186 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2187 case HCI_INIT_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS: 2188 if (hci_le_supported()) { 2189 hci_stack->substate = HCI_INIT_W4_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS; 2190 hci_send_cmd(&hci_le_set_host_feature, 32, 1); 2191 break; 2192 } 2193 #endif 2194 2195 /* fall through */ 2196 2197 case HCI_INIT_DONE: 2198 hci_stack->substate = HCI_INIT_DONE; 2199 // main init sequence complete 2200 #ifdef ENABLE_CLASSIC 2201 // check if initial Classic GAP Tasks are completed 2202 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2203 hci_run_gap_tasks_classic(); 2204 break; 2205 } 2206 #endif 2207 #ifdef ENABLE_BLE 2208 #ifdef ENABLE_LE_CENTRAL 2209 // check if initial LE GAP Tasks are completed 2210 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2211 hci_run_general_gap_le(); 2212 break; 2213 } 2214 #endif 2215 #endif 2216 hci_init_done(); 2217 break; 2218 2219 default: 2220 return; 2221 } 2222 } 2223 2224 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2225 bool command_completed = false; 2226 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2227 uint16_t opcode = little_endian_read_16(packet,3); 2228 if (opcode == hci_stack->last_cmd_opcode){ 2229 command_completed = true; 2230 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2231 } else { 2232 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2233 } 2234 } 2235 2236 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2237 uint8_t status = packet[2]; 2238 uint16_t opcode = little_endian_read_16(packet,4); 2239 if (opcode == hci_stack->last_cmd_opcode){ 2240 if (status){ 2241 command_completed = true; 2242 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2243 } else { 2244 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2245 } 2246 } else { 2247 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2248 } 2249 } 2250 #ifndef HAVE_HOST_CONTROLLER_API 2251 // Vendor == CSR 2252 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2253 // TODO: track actual command 2254 command_completed = true; 2255 } 2256 2257 // Vendor == Toshiba 2258 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2259 // TODO: track actual command 2260 command_completed = true; 2261 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2262 hci_stack->num_cmd_packets = 1; 2263 } 2264 #endif 2265 2266 return command_completed; 2267 } 2268 2269 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2270 2271 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2272 2273 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2274 2275 #ifndef HAVE_HOST_CONTROLLER_API 2276 2277 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2278 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2279 // 2280 // HCI Reset 2281 // Timeout 100 ms 2282 // HCI Reset 2283 // Command Complete Reset 2284 // HCI Read Local Version Information 2285 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2286 // hang... 2287 // 2288 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2289 if (!command_completed 2290 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2291 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2292 2293 uint16_t opcode = little_endian_read_16(packet,3); 2294 if (opcode == hci_reset.opcode){ 2295 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2296 return; 2297 } 2298 } 2299 2300 // CSR & H5 2301 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2302 if (!command_completed 2303 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2304 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2305 2306 uint16_t opcode = little_endian_read_16(packet,3); 2307 if (opcode == hci_reset.opcode){ 2308 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2309 return; 2310 } 2311 } 2312 2313 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2314 // fix: Correct substate and behave as command below 2315 if (command_completed){ 2316 switch (hci_stack->substate){ 2317 case HCI_INIT_SEND_RESET: 2318 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2319 break; 2320 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2321 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2322 break; 2323 default: 2324 break; 2325 } 2326 } 2327 2328 #endif 2329 2330 if (!command_completed) return; 2331 2332 bool need_baud_change = false; 2333 bool need_addr_change = false; 2334 2335 #ifndef HAVE_HOST_CONTROLLER_API 2336 need_baud_change = hci_stack->config 2337 && hci_stack->chipset 2338 && hci_stack->chipset->set_baudrate_command 2339 && hci_stack->hci_transport->set_baudrate 2340 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2341 2342 need_addr_change = hci_stack->custom_bd_addr_set 2343 && hci_stack->chipset 2344 && hci_stack->chipset->set_bd_addr_command; 2345 #endif 2346 2347 switch(hci_stack->substate){ 2348 2349 #ifndef HAVE_HOST_CONTROLLER_API 2350 case HCI_INIT_SEND_RESET: 2351 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2352 // fix: just correct substate and behave as command below 2353 2354 /* fall through */ 2355 #endif 2356 2357 case HCI_INIT_W4_SEND_RESET: 2358 btstack_run_loop_remove_timer(&hci_stack->timeout); 2359 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2360 return; 2361 2362 #ifndef HAVE_HOST_CONTROLLER_API 2363 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2364 // for STLC2500D, baud rate change already happened. 2365 // for others, baud rate gets changed now 2366 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2367 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2368 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2369 hci_stack->hci_transport->set_baudrate(baud_rate); 2370 } 2371 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2372 return; 2373 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2374 btstack_run_loop_remove_timer(&hci_stack->timeout); 2375 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2376 return; 2377 case HCI_INIT_W4_CUSTOM_INIT: 2378 // repeat custom init 2379 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2380 return; 2381 #endif 2382 2383 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2384 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2385 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2386 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2387 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2388 return; 2389 } 2390 if (need_addr_change){ 2391 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2392 return; 2393 } 2394 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2395 return; 2396 #ifndef HAVE_HOST_CONTROLLER_API 2397 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2398 if (need_baud_change){ 2399 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2400 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2401 hci_stack->hci_transport->set_baudrate(baud_rate); 2402 } 2403 if (need_addr_change){ 2404 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2405 return; 2406 } 2407 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2408 return; 2409 case HCI_INIT_W4_SET_BD_ADDR: 2410 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2411 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2412 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2413 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2414 return; 2415 } 2416 // skipping st warm boot 2417 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2418 return; 2419 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2420 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2421 return; 2422 #endif 2423 2424 case HCI_INIT_DONE: 2425 // set state if we came here by fall through 2426 hci_stack->substate = HCI_INIT_DONE; 2427 return; 2428 2429 default: 2430 break; 2431 } 2432 hci_initializing_next_state(); 2433 } 2434 2435 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2436 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2437 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2438 // check if we have been aware of the HCI connection 2439 switch (conn->state){ 2440 case SENT_CREATE_CONNECTION: 2441 case RECEIVED_CONNECTION_REQUEST: 2442 break; 2443 default: 2444 return; 2445 } 2446 2447 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2448 bd_addr_t bd_address; 2449 (void)memcpy(&bd_address, conn->address, 6); 2450 2451 #ifdef ENABLE_CLASSIC 2452 // cache needed data 2453 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2454 #endif 2455 2456 // connection failed, remove entry 2457 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2458 btstack_memory_hci_connection_free( conn ); 2459 2460 #ifdef ENABLE_CLASSIC 2461 // notify client if dedicated bonding 2462 if (notify_dedicated_bonding_failed){ 2463 log_info("hci notify_dedicated_bonding_failed"); 2464 hci_emit_dedicated_bonding_result(bd_address, status); 2465 } 2466 2467 // if authentication error, also delete link key 2468 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2469 gap_drop_link_key_for_bd_addr(bd_address); 2470 } 2471 #else 2472 UNUSED(status); 2473 #endif 2474 } 2475 2476 #ifdef ENABLE_CLASSIC 2477 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2478 // SSP Controller 2479 if (features[6] & (1 << 3)){ 2480 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2481 } 2482 // eSCO 2483 if (features[3] & (1<<7)){ 2484 conn->remote_supported_features[0] |= 1; 2485 } 2486 // Extended features 2487 if (features[7] & (1<<7)){ 2488 conn->remote_supported_features[0] |= 2; 2489 } 2490 } 2491 2492 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2493 // SSP Host 2494 if (features[0] & (1 << 0)){ 2495 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2496 } 2497 // SC Host 2498 if (features[0] & (1 << 3)){ 2499 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2500 } 2501 } 2502 2503 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2504 // SC Controller 2505 if (features[1] & (1 << 0)){ 2506 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2507 } 2508 } 2509 2510 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2511 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2512 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2513 log_info("Remote features %02x, bonding flags %" PRIx32, conn->remote_supported_features[0], conn->bonding_flags); 2514 if (conn->bonding_flags & BONDING_DEDICATED){ 2515 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2516 } 2517 } 2518 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2519 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2520 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2521 } 2522 2523 #endif 2524 2525 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2526 // handle BT initialization 2527 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2528 hci_initializing_event_handler(packet, size); 2529 } 2530 2531 // help with BT sleep 2532 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2533 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2534 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2535 && (hci_event_command_complete_get_command_opcode(packet) == HCI_OPCODE_HCI_WRITE_SCAN_ENABLE)){ 2536 hci_initializing_next_state(); 2537 } 2538 } 2539 2540 #ifdef ENABLE_CLASSIC 2541 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2542 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2543 conn->encryption_key_size = encryption_key_size; 2544 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2545 2546 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2547 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2548 conn->bonding_flags &= ~BONDING_DEDICATED; 2549 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2550 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2551 return; 2552 } 2553 2554 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2555 conn->requested_security_level = LEVEL_0; 2556 hci_emit_security_level(conn->con_handle, security_level); 2557 return; 2558 } 2559 2560 // Request remote features if not already done 2561 hci_trigger_remote_features_for_connection(conn); 2562 2563 // Request Authentication if not already done 2564 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2565 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2566 } 2567 #endif 2568 2569 static void hci_store_local_supported_commands(const uint8_t * packet){ 2570 // create mapping table 2571 #define X(name, offset, bit) { offset, bit }, 2572 static struct { 2573 uint8_t byte_offset; 2574 uint8_t bit_position; 2575 } supported_hci_commands_map [] = { 2576 SUPPORTED_HCI_COMMANDS 2577 }; 2578 #undef X 2579 2580 // create names for debug purposes 2581 #ifdef ENABLE_LOG_DEBUG 2582 #define X(name, offset, bit) #name, 2583 static const char * command_names[] = { 2584 SUPPORTED_HCI_COMMANDS 2585 }; 2586 #undef X 2587 #endif 2588 2589 hci_stack->local_supported_commands = 0; 2590 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2591 uint16_t i; 2592 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2593 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2594 #ifdef ENABLE_LOG_DEBUG 2595 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); 2596 #else 2597 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2598 #endif 2599 hci_stack->local_supported_commands |= (1LU << i); 2600 } 2601 } 2602 log_info("Local supported commands summary %08" PRIx32, hci_stack->local_supported_commands); 2603 } 2604 2605 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2606 UNUSED(size); 2607 2608 uint16_t manufacturer; 2609 #ifdef ENABLE_CLASSIC 2610 hci_con_handle_t handle; 2611 hci_connection_t * conn; 2612 #endif 2613 #if defined(ENABLE_CLASSIC) || (defined(ENABLE_BLE) && defined(ENABLE_LE_ISOCHRONOUS_STREAMS)) 2614 uint8_t status; 2615 #endif 2616 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2617 le_audio_cig_t * cig; 2618 #endif 2619 2620 // get num cmd packets - limit to 1 to reduce complexity 2621 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2622 2623 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2624 switch (opcode){ 2625 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2626 if (packet[5]) break; 2627 // terminate, name 248 chars 2628 packet[6+248] = 0; 2629 log_info("local name: %s", &packet[6]); 2630 break; 2631 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2632 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2633 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2634 uint16_t acl_len = little_endian_read_16(packet, 6); 2635 uint16_t sco_len = packet[8]; 2636 2637 // determine usable ACL/SCO payload size 2638 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2639 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2640 2641 hci_stack->acl_packets_total_num = (uint8_t) btstack_min(little_endian_read_16(packet, 9), MAX_NR_CONTROLLER_ACL_BUFFERS); 2642 hci_stack->sco_packets_total_num = (uint8_t) btstack_min(little_endian_read_16(packet, 11), MAX_NR_CONTROLLER_SCO_PACKETS); 2643 2644 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2645 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2646 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2647 } 2648 break; 2649 case HCI_OPCODE_HCI_READ_RSSI: 2650 if (packet[5] == ERROR_CODE_SUCCESS){ 2651 uint8_t event[5]; 2652 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2653 event[1] = 3; 2654 (void)memcpy(&event[2], &packet[6], 3); 2655 hci_emit_event(event, sizeof(event), 1); 2656 } 2657 break; 2658 #ifdef ENABLE_BLE 2659 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2660 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2661 hci_stack->le_iso_packets_total_num = packet[11]; 2662 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2663 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2664 2665 /* fall through */ 2666 2667 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2668 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2669 hci_stack->le_acl_packets_total_num = packet[8]; 2670 // determine usable ACL payload size 2671 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2672 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2673 } 2674 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); 2675 break; 2676 #endif 2677 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2678 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2679 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2680 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2681 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); 2682 break; 2683 #endif 2684 #ifdef ENABLE_LE_CENTRAL 2685 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2686 hci_stack->le_whitelist_capacity = packet[6]; 2687 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2688 break; 2689 #endif 2690 #ifdef ENABLE_LE_PERIPHERAL 2691 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2692 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2693 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2694 break; 2695 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2696 if (hci_stack->le_advertising_set_in_current_command != 0) { 2697 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2698 hci_stack->le_advertising_set_in_current_command = 0; 2699 if (advertising_set == NULL) break; 2700 uint8_t adv_status = packet[6]; 2701 uint8_t tx_power = packet[7]; 2702 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 }; 2703 if (adv_status == 0){ 2704 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2705 } 2706 hci_emit_event(event, sizeof(event), 1); 2707 } 2708 break; 2709 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2710 if (hci_stack->le_advertising_set_in_current_command != 0) { 2711 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2712 hci_stack->le_advertising_set_in_current_command = 0; 2713 if (advertising_set == NULL) break; 2714 uint8_t adv_status = packet[5]; 2715 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2716 if (adv_status == 0){ 2717 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2718 } 2719 hci_emit_event(event, sizeof(event), 1); 2720 } 2721 break; 2722 #endif 2723 #endif 2724 case HCI_OPCODE_HCI_READ_BD_ADDR: 2725 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2726 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)); 2727 #ifdef ENABLE_CLASSIC 2728 if (hci_stack->link_key_db){ 2729 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2730 } 2731 #endif 2732 break; 2733 #ifdef ENABLE_CLASSIC 2734 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2735 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 2736 break; 2737 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2738 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2739 if (status == ERROR_CODE_SUCCESS) { 2740 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2741 } else { 2742 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2743 } 2744 break; 2745 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2746 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2747 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2748 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2749 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2750 hci_emit_event(event, sizeof(event), 1); 2751 } 2752 break; 2753 #endif 2754 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2755 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2756 2757 #ifdef ENABLE_CLASSIC 2758 // determine usable ACL packet types based on host buffer size and supported features 2759 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2760 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2761 #endif 2762 // Classic/LE 2763 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2764 break; 2765 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2766 manufacturer = little_endian_read_16(packet, 10); 2767 // map Cypress to Broadcom 2768 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2769 log_info("Treat Cypress as Broadcom"); 2770 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2771 little_endian_store_16(packet, 10, manufacturer); 2772 } 2773 hci_stack->manufacturer = manufacturer; 2774 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2775 break; 2776 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2777 hci_store_local_supported_commands(packet); 2778 break; 2779 #ifdef ENABLE_CLASSIC 2780 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2781 if (packet[5]) return; 2782 hci_stack->synchronous_flow_control_enabled = 1; 2783 break; 2784 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2785 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2786 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2787 conn = hci_connection_for_handle(handle); 2788 if (conn != NULL) { 2789 uint8_t key_size = 0; 2790 if (status == 0){ 2791 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2792 log_info("Handle %04x key Size: %u", handle, key_size); 2793 } else { 2794 key_size = 1; 2795 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2796 } 2797 hci_handle_read_encryption_key_size_complete(conn, key_size); 2798 } 2799 break; 2800 // assert pairing complete event is emitted. 2801 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2802 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2803 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2804 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2805 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2806 // lookup connection by gap pairing addr 2807 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2808 if (conn == NULL) break; 2809 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2810 break; 2811 2812 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2813 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2814 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2815 uint8_t event[67]; 2816 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2817 event[1] = 65; 2818 (void)memset(&event[2], 0, 65); 2819 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2820 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2821 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2822 event[2] = 3; 2823 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2824 } else { 2825 event[2] = 1; 2826 } 2827 } 2828 hci_emit_event(event, sizeof(event), 0); 2829 break; 2830 } 2831 2832 // note: only needed if user does not provide OOB data 2833 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2834 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2835 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2836 if (conn == NULL) break; 2837 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2838 break; 2839 #endif 2840 #endif 2841 #ifdef ENABLE_BLE 2842 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2843 case HCI_OPCODE_HCI_LE_SET_CIG_PARAMETERS: 2844 // lookup CIG 2845 cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 2846 if (cig != NULL){ 2847 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2848 uint8_t i = 0; 2849 if (status == ERROR_CODE_SUCCESS){ 2850 // assign CIS handles to pre-allocated CIS 2851 btstack_linked_list_iterator_t it; 2852 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 2853 while (btstack_linked_list_iterator_has_next(&it) && (i < cig->num_cis)) { 2854 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 2855 if ((iso_stream->group_id == hci_stack->iso_active_operation_group_id) && 2856 (iso_stream->iso_type == HCI_ISO_TYPE_CIS)){ 2857 hci_con_handle_t cis_handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3+(2*i)); 2858 iso_stream->con_handle = cis_handle; 2859 cig->cis_con_handles[i] = cis_handle; 2860 i++; 2861 } 2862 } 2863 cig->state = LE_AUDIO_CIG_STATE_W4_CIS_REQUEST; 2864 hci_emit_cig_created(cig, status); 2865 } else { 2866 hci_emit_cig_created(cig, status); 2867 btstack_linked_list_remove(&hci_stack->le_audio_cigs, (btstack_linked_item_t *) cig); 2868 } 2869 } 2870 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2871 break; 2872 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2873 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2874 if (status != ERROR_CODE_SUCCESS){ 2875 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 2876 } 2877 break; 2878 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 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_SETUP_ISO_DATA_PATH: { 2885 // lookup BIG by state 2886 btstack_linked_list_iterator_t it; 2887 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 2888 while (btstack_linked_list_iterator_has_next(&it)) { 2889 le_audio_big_t *big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 2890 if (big->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2891 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2892 if (status == ERROR_CODE_SUCCESS){ 2893 big->state_vars.next_bis++; 2894 if (big->state_vars.next_bis == big->num_bis){ 2895 big->state = LE_AUDIO_BIG_STATE_ACTIVE; 2896 hci_emit_big_created(big, ERROR_CODE_SUCCESS); 2897 } else { 2898 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2899 } 2900 } else { 2901 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2902 big->state_vars.status = status; 2903 } 2904 return; 2905 } 2906 } 2907 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2908 while (btstack_linked_list_iterator_has_next(&it)) { 2909 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2910 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2911 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2912 if (status == ERROR_CODE_SUCCESS){ 2913 big_sync->state_vars.next_bis++; 2914 if (big_sync->state_vars.next_bis == big_sync->num_bis){ 2915 big_sync->state = LE_AUDIO_BIG_STATE_ACTIVE; 2916 hci_emit_big_sync_created(big_sync, ERROR_CODE_SUCCESS); 2917 } else { 2918 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2919 } 2920 } else { 2921 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2922 big_sync->state_vars.status = status; 2923 } 2924 return; 2925 } 2926 } 2927 // Lookup CIS via active group operation 2928 if (hci_stack->iso_active_operation_type == HCI_ISO_TYPE_CIS){ 2929 if (hci_stack->iso_active_operation_group_id == HCI_ISO_GROUP_ID_SINGLE_CIS){ 2930 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2931 2932 // lookup CIS by state 2933 btstack_linked_list_iterator_t it; 2934 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 2935 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2936 while (btstack_linked_list_iterator_has_next(&it)){ 2937 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 2938 handle = iso_stream->con_handle; 2939 switch (iso_stream->state){ 2940 case HCI_ISO_STREAM_STATE_W4_ISO_SETUP_INPUT: 2941 if (status != ERROR_CODE_SUCCESS){ 2942 hci_iso_stream_finalize(iso_stream); 2943 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, status); 2944 break; 2945 } 2946 if (iso_stream->max_sdu_c_to_p > 0){ 2947 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT; 2948 } else { 2949 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, ERROR_CODE_SUCCESS); 2950 } 2951 break; 2952 case HCI_ISO_STREAM_STATE_W4_ISO_SETUP_OUTPUT: 2953 if (status != ERROR_CODE_SUCCESS){ 2954 hci_iso_stream_finalize(iso_stream); 2955 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, status); 2956 break; 2957 } 2958 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, ERROR_CODE_SUCCESS); 2959 break; 2960 default: 2961 break; 2962 } 2963 } 2964 } else { 2965 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2966 cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 2967 if (cig != NULL) { 2968 // emit cis created if all ISO Paths have been created 2969 // assume we are central 2970 uint8_t cis_index = cig->state_vars.next_cis >> 1; 2971 uint8_t cis_direction = cig->state_vars.next_cis & 1; 2972 bool outgoing_needed = cig->params->cis_params[cis_index].max_sdu_p_to_c > 0; 2973 // if outgoing has been setup, or incoming was setup but outgoing not required 2974 if ((cis_direction == 1) || (outgoing_needed == false)){ 2975 hci_emit_cis_created(cig->cig_id, cig->cis_con_handles[cis_index], status); 2976 } 2977 // next state 2978 cig->state_vars.next_cis++; 2979 cig->state = LE_AUDIO_CIG_STATE_SETUP_ISO_PATH; 2980 } 2981 } 2982 } 2983 break; 2984 } 2985 case HCI_OPCODE_HCI_LE_BIG_TERMINATE_SYNC: { 2986 // lookup BIG by state 2987 btstack_linked_list_iterator_t it; 2988 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2989 while (btstack_linked_list_iterator_has_next(&it)) { 2990 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2991 uint8_t big_handle = big_sync->big_handle; 2992 switch (big_sync->state){ 2993 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 2994 btstack_linked_list_iterator_remove(&it); 2995 hci_emit_big_sync_created(big_sync, big_sync->state_vars.status); 2996 return; 2997 default: 2998 btstack_linked_list_iterator_remove(&it); 2999 hci_emit_big_sync_stopped(big_handle); 3000 return; 3001 } 3002 } 3003 break; 3004 } 3005 #endif 3006 #endif 3007 default: 3008 break; 3009 } 3010 } 3011 3012 static void handle_command_status_event(uint8_t * packet, uint16_t size) { 3013 UNUSED(size); 3014 3015 // get num cmd packets - limit to 1 to reduce complexity 3016 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 3017 3018 // get opcode and command status 3019 uint16_t opcode = hci_event_command_status_get_command_opcode(packet); 3020 3021 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) || defined(ENABLE_LE_ISOCHRONOUS_STREAMS) 3022 uint8_t status = hci_event_command_status_get_status(packet); 3023 #endif 3024 3025 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 3026 bd_addr_type_t addr_type; 3027 #endif 3028 3029 switch (opcode){ 3030 #ifdef ENABLE_CLASSIC 3031 case HCI_OPCODE_HCI_CREATE_CONNECTION: 3032 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 3033 #endif 3034 #ifdef ENABLE_LE_CENTRAL 3035 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 3036 #endif 3037 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 3038 addr_type = hci_stack->outgoing_addr_type; 3039 3040 // reset outgoing address info 3041 memset(hci_stack->outgoing_addr, 0, 6); 3042 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 3043 3044 // on error 3045 if (status != ERROR_CODE_SUCCESS){ 3046 #ifdef ENABLE_LE_CENTRAL 3047 if (hci_is_le_connection_type(addr_type)){ 3048 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3049 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3050 } 3051 #endif 3052 // error => outgoing connection failed 3053 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 3054 if (conn != NULL){ 3055 hci_handle_connection_failed(conn, status); 3056 } 3057 } 3058 break; 3059 #endif 3060 #ifdef ENABLE_CLASSIC 3061 case HCI_OPCODE_HCI_INQUIRY: 3062 if (status == ERROR_CODE_SUCCESS) { 3063 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3064 } else { 3065 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3066 } 3067 break; 3068 #endif 3069 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3070 case HCI_OPCODE_HCI_LE_CREATE_CIS: 3071 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 3072 if (status == ERROR_CODE_SUCCESS){ 3073 hci_iso_stream_requested_confirm(HCI_ISO_GROUP_ID_INVALID); 3074 } else { 3075 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 3076 } 3077 break; 3078 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 3079 default: 3080 break; 3081 } 3082 } 3083 3084 #ifdef ENABLE_BLE 3085 static void event_handle_le_connection_complete(const uint8_t * packet){ 3086 bd_addr_t addr; 3087 bd_addr_type_t addr_type; 3088 hci_connection_t * conn; 3089 3090 // Connection management 3091 reverse_bd_addr(&packet[8], addr); 3092 addr_type = (bd_addr_type_t)packet[7]; 3093 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 3094 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3095 3096 #ifdef ENABLE_LE_CENTRAL 3097 // handle error: error is reported only to the initiator -> outgoing connection 3098 if (packet[3]){ 3099 3100 // handle cancelled outgoing connection 3101 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 3102 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 3103 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 3104 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 3105 // reset state 3106 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3107 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3108 // get outgoing connection conn struct for direct connect 3109 conn = gap_get_outgoing_connection(); 3110 } 3111 3112 // outgoing le connection establishment is done 3113 if (conn){ 3114 // remove entry 3115 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3116 btstack_memory_hci_connection_free( conn ); 3117 } 3118 return; 3119 } 3120 #endif 3121 3122 // on success, both hosts receive connection complete event 3123 if (packet[6] == HCI_ROLE_MASTER){ 3124 #ifdef ENABLE_LE_CENTRAL 3125 // if we're master on an le connection, it was an outgoing connection and we're done with it 3126 // note: no hci_connection_t object exists yet for connect with whitelist 3127 if (hci_is_le_connection_type(addr_type)){ 3128 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3129 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3130 } 3131 #endif 3132 } else { 3133 #ifdef ENABLE_LE_PERIPHERAL 3134 // if we're slave, it was an incoming connection, advertisements have stopped 3135 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3136 #endif 3137 } 3138 3139 // LE connections are auto-accepted, so just create a connection if there isn't one already 3140 if (!conn){ 3141 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3142 } 3143 3144 // no memory, sorry. 3145 if (!conn){ 3146 return; 3147 } 3148 3149 conn->state = OPEN; 3150 conn->role = packet[6]; 3151 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 3152 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 3153 3154 // workaround: PAST doesn't work without LE Read Remote Features on PacketCraft Controller with LMP 568B 3155 conn->gap_connection_tasks = GAP_CONNECTION_TASK_LE_READ_REMOTE_FEATURES; 3156 3157 #ifdef ENABLE_LE_PERIPHERAL 3158 if (packet[6] == HCI_ROLE_SLAVE){ 3159 hci_update_advertisements_enabled_for_current_roles(); 3160 } 3161 #endif 3162 3163 // init unenhanced att bearer mtu 3164 conn->att_connection.mtu = ATT_DEFAULT_MTU; 3165 conn->att_connection.mtu_exchanged = false; 3166 3167 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 3168 3169 // restart timer 3170 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3171 // btstack_run_loop_add_timer(&conn->timeout); 3172 3173 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3174 3175 hci_emit_nr_connections_changed(); 3176 } 3177 #endif 3178 3179 #ifdef ENABLE_CLASSIC 3180 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){ 3181 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 3182 // LEVEL_4 is tested by l2cap 3183 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 3184 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 3185 if (level >= LEVEL_3){ 3186 // MITM not possible without keyboard or display 3187 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3188 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3189 3190 // MITM possible if one side has keyboard and the other has keyboard or display 3191 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3192 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3193 3194 // MITM not possible if one side has only display and other side has no keyboard 3195 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3196 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3197 } 3198 // LEVEL 2 requires SSP, which is a given 3199 return true; 3200 } 3201 3202 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 3203 // get requested security level 3204 gap_security_level_t requested_security_level = conn->requested_security_level; 3205 if (hci_stack->gap_secure_connections_only_mode){ 3206 requested_security_level = LEVEL_4; 3207 } 3208 3209 // assess security: LEVEL 4 requires SC 3210 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 3211 if ((requested_security_level == LEVEL_4) && 3212 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 3213 !hci_remote_sc_enabled(conn)){ 3214 log_info("Level 4 required, but SC not supported -> abort"); 3215 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3216 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3217 return; 3218 } 3219 3220 // assess security based on io capabilities 3221 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 3222 // responder: fully validate io caps of both sides as well as OOB data 3223 bool security_possible = false; 3224 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 3225 3226 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3227 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 3228 // so we merge the OOB data availability 3229 uint8_t have_oob_data = conn->io_cap_response_oob_data; 3230 if (conn->classic_oob_c_192 != NULL){ 3231 have_oob_data |= 1; 3232 } 3233 if (conn->classic_oob_c_256 != NULL){ 3234 have_oob_data |= 2; 3235 } 3236 // for up to Level 3, either P-192 as well as P-256 will do 3237 // 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 3238 // if remote does not SC, we should not receive P-256 data either 3239 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 3240 security_possible = true; 3241 } 3242 // for Level 4, P-256 is needed 3243 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 3244 security_possible = true; 3245 } 3246 #endif 3247 3248 if (security_possible == false){ 3249 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 3250 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3251 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3252 return; 3253 } 3254 } else { 3255 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 3256 #ifndef ENABLE_CLASSIC_PAIRING_OOB 3257 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3258 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 3259 log_info("Level 3+ required, but no input/output -> abort"); 3260 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3261 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3262 return; 3263 } 3264 #endif 3265 #endif 3266 } 3267 3268 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3269 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 3270 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 3271 } else { 3272 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3273 } 3274 #endif 3275 } 3276 3277 #endif 3278 3279 static void event_handler(uint8_t *packet, uint16_t size){ 3280 3281 uint16_t event_length = packet[1]; 3282 3283 // assert packet is complete 3284 if (size != (event_length + 2u)){ 3285 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 3286 return; 3287 } 3288 3289 hci_con_handle_t handle; 3290 hci_connection_t * conn; 3291 int i; 3292 3293 #ifdef ENABLE_CLASSIC 3294 hci_link_type_t link_type; 3295 bd_addr_t addr; 3296 bd_addr_type_t addr_type; 3297 #endif 3298 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3299 hci_iso_stream_t * iso_stream; 3300 le_audio_big_t * big; 3301 le_audio_big_sync_t * big_sync; 3302 #endif 3303 3304 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 3305 3306 switch (hci_event_packet_get_type(packet)) { 3307 3308 case HCI_EVENT_COMMAND_COMPLETE: 3309 handle_command_complete_event(packet, size); 3310 break; 3311 3312 case HCI_EVENT_COMMAND_STATUS: 3313 handle_command_status_event(packet, size); 3314 break; 3315 3316 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3317 if (size < 3) return; 3318 uint16_t num_handles = packet[2]; 3319 if (size != (3u + num_handles * 4u)) return; 3320 #ifdef ENABLE_CLASSIC 3321 bool notify_sco = false; 3322 #endif 3323 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3324 bool notify_iso = false; 3325 #endif 3326 uint16_t offset = 3; 3327 for (i=0; i<num_handles;i++){ 3328 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3329 offset += 2u; 3330 uint16_t num_packets = little_endian_read_16(packet, offset); 3331 offset += 2u; 3332 3333 conn = hci_connection_for_handle(handle); 3334 if (conn != NULL) { 3335 3336 if (conn->num_packets_sent >= num_packets) { 3337 conn->num_packets_sent -= num_packets; 3338 } else { 3339 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3340 conn->num_packets_sent = 0; 3341 } 3342 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3343 #ifdef ENABLE_CLASSIC 3344 if (conn->address_type == BD_ADDR_TYPE_SCO){ 3345 notify_sco = true; 3346 } 3347 #endif 3348 } 3349 3350 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 3351 hci_controller_dump_packets(); 3352 #endif 3353 3354 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3355 if (conn == NULL){ 3356 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(handle); 3357 if (iso_stream != NULL){ 3358 if (iso_stream->num_packets_sent >= num_packets) { 3359 iso_stream->num_packets_sent -= num_packets; 3360 } else { 3361 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3362 iso_stream->num_packets_sent = 0; 3363 } 3364 if (iso_stream->iso_type == HCI_ISO_TYPE_BIS){ 3365 le_audio_big_t * big = hci_big_for_handle(iso_stream->group_id); 3366 if (big != NULL){ 3367 big->num_completed_timestamp_current_valid = true; 3368 big->num_completed_timestamp_current_ms = btstack_run_loop_get_time_ms(); 3369 } 3370 } 3371 log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", 3372 num_packets, handle, iso_stream->num_packets_sent); 3373 notify_iso = true; 3374 } 3375 } 3376 #endif 3377 } 3378 3379 #ifdef ENABLE_CLASSIC 3380 if (notify_sco){ 3381 hci_notify_if_sco_can_send_now(); 3382 } 3383 #endif 3384 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3385 if (notify_iso){ 3386 hci_iso_notify_can_send_now(); 3387 } 3388 #endif 3389 break; 3390 } 3391 3392 #ifdef ENABLE_CLASSIC 3393 case HCI_EVENT_FLUSH_OCCURRED: 3394 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3395 handle = hci_event_flush_occurred_get_handle(packet); 3396 conn = hci_connection_for_handle(handle); 3397 if (conn) { 3398 log_info("Flush occurred, disconnect 0x%04x", handle); 3399 conn->state = SEND_DISCONNECT; 3400 } 3401 break; 3402 3403 case HCI_EVENT_INQUIRY_COMPLETE: 3404 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3405 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3406 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3407 hci_emit_event(event, sizeof(event), 1); 3408 } 3409 break; 3410 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3411 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3412 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3413 } 3414 break; 3415 case HCI_EVENT_CONNECTION_REQUEST: 3416 reverse_bd_addr(&packet[2], addr); 3417 link_type = (hci_link_type_t) packet[11]; 3418 3419 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3420 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3421 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3422 bd_addr_copy(hci_stack->decline_addr, addr); 3423 break; 3424 } 3425 3426 if (hci_stack->gap_classic_accept_callback != NULL){ 3427 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3428 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS; 3429 bd_addr_copy(hci_stack->decline_addr, addr); 3430 break; 3431 } 3432 } 3433 3434 // TODO: eval COD 8-10 3435 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3436 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3437 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3438 if (!conn) { 3439 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3440 } 3441 if (!conn) { 3442 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3443 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3444 bd_addr_copy(hci_stack->decline_addr, addr); 3445 hci_run(); 3446 // avoid event to higher layer 3447 return; 3448 } 3449 conn->role = HCI_ROLE_SLAVE; 3450 conn->state = RECEIVED_CONNECTION_REQUEST; 3451 // store info about eSCO 3452 if (link_type == HCI_LINK_TYPE_ESCO){ 3453 conn->remote_supported_features[0] |= 1; 3454 } 3455 hci_run(); 3456 break; 3457 3458 case HCI_EVENT_CONNECTION_COMPLETE: 3459 // Connection management 3460 reverse_bd_addr(&packet[5], addr); 3461 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3462 addr_type = BD_ADDR_TYPE_ACL; 3463 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3464 if (conn) { 3465 switch (conn->state){ 3466 // expected states 3467 case ACCEPTED_CONNECTION_REQUEST: 3468 case SENT_CREATE_CONNECTION: 3469 break; 3470 // unexpected state -> ignore 3471 default: 3472 // don't forward event to app 3473 return; 3474 } 3475 if (!packet[2]){ 3476 conn->state = OPEN; 3477 conn->con_handle = little_endian_read_16(packet, 3); 3478 3479 // trigger write supervision timeout if we're master 3480 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3481 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3482 } 3483 3484 // trigger write automatic flush timeout 3485 if (hci_stack->automatic_flush_timeout != 0){ 3486 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3487 } 3488 3489 // restart timer 3490 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3491 btstack_run_loop_add_timer(&conn->timeout); 3492 3493 // trigger remote features for dedicated bonding 3494 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3495 hci_trigger_remote_features_for_connection(conn); 3496 } 3497 3498 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3499 3500 hci_emit_nr_connections_changed(); 3501 } else { 3502 // connection failed 3503 hci_handle_connection_failed(conn, packet[2]); 3504 } 3505 } 3506 break; 3507 3508 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3509 reverse_bd_addr(&packet[5], addr); 3510 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3511 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3512 if (packet[2]){ 3513 // connection failed 3514 if (conn){ 3515 hci_handle_connection_failed(conn, packet[2]); 3516 } 3517 break; 3518 } 3519 if (!conn) { 3520 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3521 } 3522 if (!conn) { 3523 break; 3524 } 3525 conn->state = OPEN; 3526 conn->con_handle = little_endian_read_16(packet, 3); 3527 3528 #ifdef ENABLE_SCO_OVER_HCI 3529 // update SCO 3530 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3531 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3532 } 3533 // trigger can send now 3534 if (hci_have_usb_transport()){ 3535 hci_stack->sco_can_send_now = true; 3536 } 3537 #endif 3538 #ifdef HAVE_SCO_TRANSPORT 3539 // configure sco transport 3540 if (hci_stack->sco_transport != NULL){ 3541 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3542 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3543 } 3544 #endif 3545 break; 3546 3547 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3548 handle = little_endian_read_16(packet, 3); 3549 conn = hci_connection_for_handle(handle); 3550 if (!conn) break; 3551 if (!packet[2]){ 3552 const uint8_t * features = &packet[5]; 3553 hci_handle_remote_features_page_0(conn, features); 3554 3555 // read extended features if possible 3556 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3557 && ((conn->remote_supported_features[0] & 2) != 0)) { 3558 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3559 break; 3560 } 3561 } 3562 hci_handle_remote_features_received(conn); 3563 break; 3564 3565 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3566 handle = little_endian_read_16(packet, 3); 3567 conn = hci_connection_for_handle(handle); 3568 if (!conn) break; 3569 // status = ok, page = 1 3570 if (!packet[2]) { 3571 uint8_t page_number = packet[5]; 3572 uint8_t maximum_page_number = packet[6]; 3573 const uint8_t * features = &packet[7]; 3574 bool done = false; 3575 switch (page_number){ 3576 case 1: 3577 hci_handle_remote_features_page_1(conn, features); 3578 if (maximum_page_number >= 2){ 3579 // get Secure Connections (Controller) from Page 2 if available 3580 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3581 } else { 3582 // otherwise, assume SC (Controller) == SC (Host) 3583 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3584 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3585 } 3586 done = true; 3587 } 3588 break; 3589 case 2: 3590 hci_handle_remote_features_page_2(conn, features); 3591 done = true; 3592 break; 3593 default: 3594 break; 3595 } 3596 if (!done) break; 3597 } 3598 hci_handle_remote_features_received(conn); 3599 break; 3600 3601 case HCI_EVENT_LINK_KEY_REQUEST: 3602 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3603 hci_event_link_key_request_get_bd_addr(packet, addr); 3604 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3605 if (!conn) break; 3606 3607 // lookup link key in db if not cached 3608 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3609 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3610 } 3611 3612 // response sent by hci_run() 3613 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3614 #endif 3615 break; 3616 3617 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3618 hci_event_link_key_request_get_bd_addr(packet, addr); 3619 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3620 if (!conn) break; 3621 3622 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3623 3624 // CVE-2020-26555: ignore NULL link key 3625 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3626 if (btstack_is_null(&packet[8], 16)) break; 3627 3628 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3629 // Change Connection Encryption keeps link key type 3630 if (link_key_type != CHANGED_COMBINATION_KEY){ 3631 conn->link_key_type = link_key_type; 3632 } 3633 3634 // cache link key. link keys stored in little-endian format for legacy reasons 3635 memcpy(&conn->link_key, &packet[8], 16); 3636 3637 // only store link key: 3638 // - if bondable enabled 3639 if (hci_stack->bondable == false) break; 3640 // - if security level sufficient 3641 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3642 // - for SSP, also check if remote side requested bonding as well 3643 if (conn->link_key_type != COMBINATION_KEY){ 3644 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3645 if (!remote_bonding){ 3646 break; 3647 } 3648 } 3649 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3650 break; 3651 } 3652 3653 case HCI_EVENT_PIN_CODE_REQUEST: 3654 hci_event_pin_code_request_get_bd_addr(packet, addr); 3655 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3656 if (!conn) break; 3657 3658 hci_pairing_started(conn, false); 3659 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3660 if (!hci_stack->bondable ){ 3661 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3662 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3663 hci_run(); 3664 return; 3665 } 3666 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3667 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3668 log_info("Level 4 required, but SC not supported -> abort"); 3669 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3670 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3671 hci_run(); 3672 return; 3673 } 3674 break; 3675 3676 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3677 hci_event_io_capability_response_get_bd_addr(packet, addr); 3678 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3679 if (!conn) break; 3680 3681 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3682 hci_pairing_started(conn, true); 3683 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3684 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3685 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3686 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3687 #endif 3688 break; 3689 3690 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3691 hci_event_io_capability_response_get_bd_addr(packet, addr); 3692 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3693 if (!conn) break; 3694 3695 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3696 hci_connection_timestamp(conn); 3697 hci_pairing_started(conn, true); 3698 break; 3699 3700 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3701 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3702 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3703 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3704 if (!conn) break; 3705 3706 hci_connection_timestamp(conn); 3707 3708 hci_pairing_started(conn, true); 3709 3710 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3711 break; 3712 #endif 3713 3714 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3715 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3716 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3717 if (!conn) break; 3718 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3719 if (hci_stack->ssp_auto_accept){ 3720 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3721 }; 3722 } else { 3723 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3724 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3725 // don't forward event to app 3726 hci_run(); 3727 return; 3728 } 3729 break; 3730 3731 case HCI_EVENT_USER_PASSKEY_REQUEST: 3732 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3733 if (hci_stack->ssp_auto_accept){ 3734 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3735 }; 3736 break; 3737 3738 case HCI_EVENT_MODE_CHANGE: 3739 handle = hci_event_mode_change_get_handle(packet); 3740 conn = hci_connection_for_handle(handle); 3741 if (!conn) break; 3742 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3743 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3744 break; 3745 #endif 3746 3747 case HCI_EVENT_ENCRYPTION_CHANGE: 3748 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3749 handle = hci_event_encryption_change_get_connection_handle(packet); 3750 conn = hci_connection_for_handle(handle); 3751 if (!conn) break; 3752 if (hci_event_encryption_change_get_status(packet) == 0u) { 3753 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3754 if (encryption_enabled){ 3755 if (hci_is_le_connection(conn)){ 3756 // For LE, we accept connection as encrypted 3757 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3758 } 3759 #ifdef ENABLE_CLASSIC 3760 else { 3761 3762 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3763 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3764 bool connected_uses_aes_ccm = encryption_enabled == 2; 3765 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3766 log_info("SC during pairing, but only E0 now -> abort"); 3767 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3768 break; 3769 } 3770 3771 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3772 if (connected_uses_aes_ccm){ 3773 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3774 } 3775 3776 #ifdef ENABLE_TESTING_SUPPORT 3777 // work around for issue with PTS dongle 3778 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3779 #endif 3780 // validate encryption key size 3781 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3782 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3783 // already got encryption key size 3784 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3785 } else { 3786 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3787 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3788 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3789 } else { 3790 // if not, pretend everything is perfect 3791 hci_handle_read_encryption_key_size_complete(conn, 16); 3792 } 3793 } 3794 } 3795 #endif 3796 } else { 3797 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3798 } 3799 } else { 3800 uint8_t status = hci_event_encryption_change_get_status(packet); 3801 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3802 conn->bonding_flags &= ~BONDING_DEDICATED; 3803 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3804 conn->bonding_status = status; 3805 } 3806 } 3807 3808 break; 3809 3810 #ifdef ENABLE_CLASSIC 3811 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3812 handle = hci_event_authentication_complete_get_connection_handle(packet); 3813 conn = hci_connection_for_handle(handle); 3814 if (!conn) break; 3815 3816 // clear authentication active flag 3817 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3818 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3819 3820 // authenticated only if auth status == 0 3821 if (hci_event_authentication_complete_get_status(packet) == 0){ 3822 // authenticated 3823 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3824 3825 // If not already encrypted, start encryption 3826 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3827 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3828 break; 3829 } 3830 } 3831 3832 // emit updated security level 3833 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3834 break; 3835 3836 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3837 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3838 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3839 if (!conn) break; 3840 3841 // treat successfully paired connection as authenticated 3842 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3843 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3844 } 3845 3846 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3847 break; 3848 #endif 3849 3850 // HCI_EVENT_DISCONNECTION_COMPLETE 3851 // has been split, to first notify stack before shutting connection down 3852 // see end of function, too. 3853 case HCI_EVENT_DISCONNECTION_COMPLETE: 3854 if (packet[2]) break; // status != 0 3855 handle = little_endian_read_16(packet, 3); 3856 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3857 if (hci_stack->acl_fragmentation_total_size > 0u) { 3858 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3859 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3860 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3861 hci_stack->acl_fragmentation_total_size = 0; 3862 hci_stack->acl_fragmentation_pos = 0; 3863 if (release_buffer){ 3864 hci_release_packet_buffer(); 3865 } 3866 } 3867 } 3868 3869 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3870 // drop outgoing ISO fragments if it is for closed connection and release buffer if tx not active 3871 if (hci_stack->iso_fragmentation_total_size > 0u) { 3872 if (handle == READ_ISO_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3873 int release_buffer = hci_stack->iso_fragmentation_tx_active == 0u; 3874 log_info("drop fragmented ISO data for closed connection, release buffer %u", release_buffer); 3875 hci_stack->iso_fragmentation_total_size = 0; 3876 hci_stack->iso_fragmentation_pos = 0; 3877 if (release_buffer){ 3878 hci_release_packet_buffer(); 3879 } 3880 } 3881 } 3882 3883 // finalize iso stream if handle matches 3884 iso_stream = hci_iso_stream_for_con_handle(handle); 3885 if (iso_stream != NULL){ 3886 hci_iso_stream_finalize(iso_stream); 3887 break; 3888 } 3889 #endif 3890 3891 conn = hci_connection_for_handle(handle); 3892 if (!conn) break; 3893 #ifdef ENABLE_CLASSIC 3894 // pairing failed if it was ongoing 3895 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3896 #endif 3897 3898 // emit dedicatd bonding event 3899 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3900 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3901 } 3902 3903 // mark connection for shutdown, stop timers, reset state 3904 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3905 hci_connection_stop_timer(conn); 3906 hci_connection_init(conn); 3907 3908 #ifdef ENABLE_BLE 3909 #ifdef ENABLE_LE_PERIPHERAL 3910 // re-enable advertisements for le connections if active 3911 if (hci_is_le_connection(conn)){ 3912 hci_update_advertisements_enabled_for_current_roles(); 3913 } 3914 #endif 3915 #endif 3916 break; 3917 3918 case HCI_EVENT_HARDWARE_ERROR: 3919 log_error("Hardware Error: 0x%02x", packet[2]); 3920 if (hci_stack->hardware_error_callback){ 3921 (*hci_stack->hardware_error_callback)(packet[2]); 3922 } else { 3923 // if no special requests, just reboot stack 3924 hci_power_control_off(); 3925 hci_power_control_on(); 3926 } 3927 break; 3928 3929 #ifdef ENABLE_CLASSIC 3930 case HCI_EVENT_ROLE_CHANGE: 3931 if (packet[2]) break; // status != 0 3932 reverse_bd_addr(&packet[3], addr); 3933 addr_type = BD_ADDR_TYPE_ACL; 3934 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3935 if (!conn) break; 3936 conn->role = packet[9]; 3937 break; 3938 #endif 3939 3940 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3941 // release packet buffer only for asynchronous transport and if there are not further fragments 3942 if (hci_transport_synchronous()) { 3943 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3944 return; // instead of break: to avoid re-entering hci_run() 3945 } 3946 hci_stack->acl_fragmentation_tx_active = 0; 3947 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3948 hci_stack->iso_fragmentation_tx_active = 0; 3949 if (hci_stack->iso_fragmentation_total_size) break; 3950 #endif 3951 if (hci_stack->acl_fragmentation_total_size) break; 3952 hci_release_packet_buffer(); 3953 3954 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3955 hci_iso_notify_can_send_now(); 3956 #endif 3957 // L2CAP receives this event via the hci_emit_event below 3958 3959 #ifdef ENABLE_CLASSIC 3960 // For SCO, we do the can_send_now_check here 3961 hci_notify_if_sco_can_send_now(); 3962 #endif 3963 break; 3964 3965 #ifdef ENABLE_CLASSIC 3966 case HCI_EVENT_SCO_CAN_SEND_NOW: 3967 // For SCO, we do the can_send_now_check here 3968 hci_stack->sco_can_send_now = true; 3969 hci_notify_if_sco_can_send_now(); 3970 return; 3971 3972 // explode inquriy results for easier consumption 3973 case HCI_EVENT_INQUIRY_RESULT: 3974 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3975 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3976 gap_inquiry_explode(packet, size); 3977 break; 3978 #endif 3979 3980 #ifdef ENABLE_BLE 3981 case HCI_EVENT_LE_META: 3982 switch (packet[2]){ 3983 #ifdef ENABLE_LE_CENTRAL 3984 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3985 if (!hci_stack->le_scanning_enabled) break; 3986 le_handle_advertisement_report(packet, size); 3987 break; 3988 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3989 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3990 if (!hci_stack->le_scanning_enabled) break; 3991 le_handle_extended_advertisement_report(packet, size); 3992 break; 3993 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 3994 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 3995 hci_stack->le_periodic_sync_state = LE_CONNECTING_IDLE; 3996 break; 3997 #endif 3998 #endif 3999 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 4000 event_handle_le_connection_complete(packet); 4001 break; 4002 4003 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 4004 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 4005 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 4006 conn = hci_connection_for_handle(handle); 4007 if (!conn) break; 4008 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 4009 break; 4010 4011 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 4012 // connection 4013 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 4014 conn = hci_connection_for_handle(handle); 4015 if (conn) { 4016 // read arguments 4017 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 4018 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 4019 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 4020 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 4021 4022 // validate against current connection parameter range 4023 le_connection_parameter_range_t existing_range; 4024 gap_get_connection_parameter_range(&existing_range); 4025 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 4026 if (update_parameter){ 4027 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 4028 conn->le_conn_interval_min = le_conn_interval_min; 4029 conn->le_conn_interval_max = le_conn_interval_max; 4030 conn->le_conn_latency = le_conn_latency; 4031 conn->le_supervision_timeout = le_supervision_timeout; 4032 } else { 4033 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 4034 } 4035 } 4036 break; 4037 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 4038 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 4039 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 4040 conn = hci_connection_for_handle(handle); 4041 if (conn) { 4042 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 4043 } 4044 break; 4045 #endif 4046 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4047 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 4048 if (hci_stack->iso_active_operation_type == HCI_ISO_TYPE_CIS){ 4049 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 4050 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 4051 iso_stream = hci_iso_stream_for_con_handle(handle); 4052 btstack_assert(iso_stream != NULL); 4053 // track SDU 4054 iso_stream->max_sdu_c_to_p = hci_subevent_le_cis_established_get_max_pdu_c_to_p(packet); 4055 iso_stream->max_sdu_p_to_c = hci_subevent_le_cis_established_get_max_pdu_p_to_c(packet); 4056 if (hci_stack->iso_active_operation_group_id == HCI_ISO_GROUP_ID_SINGLE_CIS){ 4057 // CIS Accept by Peripheral 4058 if (status == ERROR_CODE_SUCCESS){ 4059 if (iso_stream->max_sdu_p_to_c > 0){ 4060 // we're peripheral and we will send data 4061 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT; 4062 } else { 4063 // we're peripheral and we will only receive data 4064 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_OUTPUT; 4065 } 4066 } else { 4067 hci_iso_stream_finalize(iso_stream); 4068 hci_emit_cis_created(HCI_ISO_GROUP_ID_INVALID, handle, status); 4069 } 4070 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4071 } else { 4072 // CIG Setup by Central 4073 le_audio_cig_t * cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 4074 btstack_assert(cig != NULL); 4075 // update iso stream state 4076 if (status == ERROR_CODE_SUCCESS){ 4077 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 4078 } else { 4079 iso_stream->state = HCI_ISO_STREAM_STATE_IDLE; 4080 } 4081 // update cig state 4082 uint8_t i; 4083 for (i=0;i<cig->num_cis;i++){ 4084 if (cig->cis_con_handles[i] == handle){ 4085 cig->cis_setup_active[i] = false; 4086 if (status == ERROR_CODE_SUCCESS){ 4087 cig->cis_established[i] = true; 4088 } else { 4089 hci_emit_cis_created(cig->cig_id, handle, status); 4090 } 4091 } 4092 } 4093 4094 // trigger iso path setup if complete 4095 bool cis_setup_active = false; 4096 for (i=0;i<cig->num_cis;i++){ 4097 cis_setup_active |= cig->cis_setup_active[i]; 4098 } 4099 if (cis_setup_active == false){ 4100 cig->state_vars.next_cis = 0; 4101 cig->state = LE_AUDIO_CIG_STATE_SETUP_ISO_PATH; 4102 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4103 } 4104 } 4105 } 4106 break; 4107 case HCI_SUBEVENT_LE_CREATE_BIG_COMPLETE: 4108 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4109 big = hci_big_for_handle(packet[4]); 4110 if (big != NULL){ 4111 uint8_t status = packet[3]; 4112 if (status == ERROR_CODE_SUCCESS){ 4113 // store bis_con_handles and trigger iso path setup 4114 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[20]); 4115 uint8_t i; 4116 for (i=0;i<num_bis;i++){ 4117 hci_con_handle_t bis_handle = (hci_con_handle_t) little_endian_read_16(packet, 21 + (2 * i)); 4118 big->bis_con_handles[i] = bis_handle; 4119 // assign bis handle 4120 btstack_linked_list_iterator_t it; 4121 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 4122 while (btstack_linked_list_iterator_has_next(&it)){ 4123 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 4124 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 4125 (iso_stream->group_id == big->big_handle)){ 4126 iso_stream->con_handle = bis_handle; 4127 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 4128 break; 4129 } 4130 } 4131 } 4132 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4133 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4134 big->state_vars.next_bis = 0; 4135 } 4136 } else { 4137 // create BIG failed or has been stopped by us 4138 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big->big_handle); 4139 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4140 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED){ 4141 hci_emit_big_created(big, status); 4142 } else { 4143 hci_emit_big_terminated(big); 4144 } 4145 } 4146 } 4147 break; 4148 case HCI_SUBEVENT_LE_TERMINATE_BIG_COMPLETE: 4149 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4150 big = hci_big_for_handle(hci_subevent_le_terminate_big_complete_get_big_handle(packet)); 4151 if (big != NULL){ 4152 // finalize associated ISO streams 4153 btstack_linked_list_iterator_t it; 4154 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 4155 while (btstack_linked_list_iterator_has_next(&it)){ 4156 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 4157 if (iso_stream->group_id == big->big_handle){ 4158 log_info("BIG Terminated, big_handle 0x%02x, con handle 0x%04x", iso_stream->group_id, iso_stream->con_handle); 4159 btstack_linked_list_iterator_remove(&it); 4160 btstack_memory_hci_iso_stream_free(iso_stream); 4161 } 4162 } 4163 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4164 switch (big->state){ 4165 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 4166 hci_emit_big_created(big, big->state_vars.status); 4167 break; 4168 default: 4169 hci_emit_big_terminated(big); 4170 break; 4171 } 4172 } 4173 break; 4174 case HCI_SUBEVENT_LE_BIG_SYNC_ESTABLISHED: 4175 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4176 big_sync = hci_big_sync_for_handle(packet[4]); 4177 if (big_sync != NULL){ 4178 uint8_t status = packet[3]; 4179 uint8_t big_handle = packet[4]; 4180 if (status == ERROR_CODE_SUCCESS){ 4181 // store bis_con_handles and trigger iso path setup 4182 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[16]); 4183 uint8_t i; 4184 for (i=0;i<num_bis;i++){ 4185 big_sync->bis_con_handles[i] = little_endian_read_16(packet, 17 + (2 * i)); 4186 } 4187 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4188 // trigger iso path setup 4189 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4190 big_sync->state_vars.next_bis = 0; 4191 } 4192 } else { 4193 // create BIG Sync failed or has been stopped by us 4194 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4195 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4196 hci_emit_big_sync_created(big_sync, status); 4197 } else { 4198 hci_emit_big_sync_stopped(big_handle); 4199 } 4200 } 4201 } 4202 break; 4203 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 4204 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4205 big_sync = hci_big_sync_for_handle(packet[4]); 4206 if (big_sync != NULL){ 4207 uint8_t big_handle = packet[4]; 4208 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4209 hci_emit_big_sync_stopped(big_handle); 4210 } 4211 break; 4212 #endif 4213 default: 4214 break; 4215 } 4216 break; 4217 #endif 4218 case HCI_EVENT_VENDOR_SPECIFIC: 4219 // Vendor specific commands often create vendor specific event instead of num completed packets 4220 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 4221 switch (hci_stack->manufacturer){ 4222 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 4223 hci_stack->num_cmd_packets = 1; 4224 break; 4225 default: 4226 break; 4227 } 4228 break; 4229 default: 4230 break; 4231 } 4232 4233 handle_event_for_current_stack_state(packet, size); 4234 4235 // notify upper stack 4236 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 4237 4238 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 4239 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 4240 handle = little_endian_read_16(packet, 3); 4241 hci_connection_t * aConn = hci_connection_for_handle(handle); 4242 // discard connection if app did not trigger a reconnect in the event handler 4243 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4244 hci_shutdown_connection(aConn); 4245 } 4246 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 4247 hci_controller_dump_packets(); 4248 #endif 4249 } 4250 4251 // execute main loop 4252 hci_run(); 4253 } 4254 4255 #ifdef ENABLE_CLASSIC 4256 4257 #ifdef ENABLE_SCO_OVER_HCI 4258 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 4259 static void sco_schedule_tx(hci_connection_t * conn); 4260 4261 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 4262 log_debug("SCO TX Timeout"); 4263 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 4264 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4265 if (!conn) return; 4266 4267 // trigger send 4268 conn->sco_tx_ready = 1; 4269 // extra packet if CVSD but SCO buffer is too short 4270 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 4271 conn->sco_tx_ready++; 4272 } 4273 hci_notify_if_sco_can_send_now(); 4274 } 4275 4276 4277 #define SCO_TX_AFTER_RX_MS (6) 4278 4279 static void sco_schedule_tx(hci_connection_t * conn){ 4280 4281 uint32_t now = btstack_run_loop_get_time_ms(); 4282 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 4283 int time_delta_ms = sco_tx_ms - now; 4284 4285 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 4286 4287 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 4288 btstack_run_loop_remove_timer(timer); 4289 btstack_run_loop_set_timer(timer, time_delta_ms); 4290 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 4291 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 4292 btstack_run_loop_add_timer(timer); 4293 } 4294 #endif 4295 4296 static void sco_handler(uint8_t * packet, uint16_t size){ 4297 // lookup connection struct 4298 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 4299 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4300 if (!conn) return; 4301 4302 #ifdef ENABLE_SCO_OVER_HCI 4303 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 4304 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 4305 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 4306 packet[2] = 0x3c; 4307 memmove(&packet[3], &packet[23], 63); 4308 size = 63; 4309 } 4310 } 4311 4312 if (hci_have_usb_transport()){ 4313 // Nothing to do 4314 } else { 4315 // 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); 4316 if (hci_stack->synchronous_flow_control_enabled == 0){ 4317 uint32_t now = btstack_run_loop_get_time_ms(); 4318 4319 if (!conn->sco_rx_valid){ 4320 // ignore first 10 packets 4321 conn->sco_rx_count++; 4322 // log_debug("sco rx count %u", conn->sco_rx_count); 4323 if (conn->sco_rx_count == 10) { 4324 // use first timestamp as is and pretent it just started 4325 conn->sco_rx_ms = now; 4326 conn->sco_rx_valid = 1; 4327 conn->sco_rx_count = 0; 4328 sco_schedule_tx(conn); 4329 } 4330 } else { 4331 // track expected arrival timme 4332 conn->sco_rx_count++; 4333 conn->sco_rx_ms += 7; 4334 int delta = (int32_t) (now - conn->sco_rx_ms); 4335 if (delta > 0){ 4336 conn->sco_rx_ms++; 4337 } 4338 // log_debug("sco rx %u", conn->sco_rx_ms); 4339 sco_schedule_tx(conn); 4340 } 4341 } 4342 } 4343 #endif 4344 4345 // deliver to app 4346 if (hci_stack->sco_packet_handler) { 4347 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 4348 } 4349 4350 #ifdef HAVE_SCO_TRANSPORT 4351 // We can send one packet for each received packet 4352 conn->sco_tx_ready++; 4353 hci_notify_if_sco_can_send_now(); 4354 #endif 4355 4356 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4357 conn->num_packets_completed++; 4358 hci_stack->host_completed_packets = 1; 4359 hci_run(); 4360 #endif 4361 } 4362 #endif 4363 4364 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 4365 hci_dump_packet(packet_type, 1, packet, size); 4366 switch (packet_type) { 4367 case HCI_EVENT_PACKET: 4368 event_handler(packet, size); 4369 break; 4370 case HCI_ACL_DATA_PACKET: 4371 acl_handler(packet, size); 4372 break; 4373 #ifdef ENABLE_CLASSIC 4374 case HCI_SCO_DATA_PACKET: 4375 sco_handler(packet, size); 4376 break; 4377 #endif 4378 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4379 case HCI_ISO_DATA_PACKET: 4380 hci_iso_packet_handler(packet, size); 4381 break; 4382 #endif 4383 default: 4384 break; 4385 } 4386 } 4387 4388 /** 4389 * @brief Add event packet handler. 4390 */ 4391 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4392 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4393 } 4394 4395 /** 4396 * @brief Remove event packet handler. 4397 */ 4398 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4399 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4400 } 4401 4402 /** Register HCI packet handlers */ 4403 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 4404 hci_stack->acl_packet_handler = handler; 4405 } 4406 4407 #ifdef ENABLE_CLASSIC 4408 /** 4409 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 4410 */ 4411 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 4412 hci_stack->sco_packet_handler = handler; 4413 } 4414 #endif 4415 4416 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4417 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 4418 hci_stack->iso_packet_handler = handler; 4419 } 4420 #endif 4421 4422 static void hci_state_reset(void){ 4423 // no connections yet 4424 hci_stack->connections = NULL; 4425 4426 // keep discoverable/connectable as this has been requested by the client(s) 4427 // hci_stack->discoverable = 0; 4428 // hci_stack->connectable = 0; 4429 // hci_stack->bondable = 1; 4430 // hci_stack->own_addr_type = 0; 4431 4432 // buffer is free 4433 hci_stack->hci_packet_buffer_reserved = false; 4434 4435 // no pending cmds 4436 hci_stack->decline_reason = 0; 4437 4438 hci_stack->secure_connections_active = false; 4439 4440 #ifdef ENABLE_CLASSIC 4441 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 4442 hci_stack->page_timeout = 0x6000; // ca. 15 sec 4443 4444 hci_stack->gap_tasks_classic = 4445 GAP_TASK_SET_DEFAULT_LINK_POLICY | 4446 GAP_TASK_SET_CLASS_OF_DEVICE | 4447 GAP_TASK_SET_LOCAL_NAME | 4448 GAP_TASK_SET_EIR_DATA | 4449 GAP_TASK_WRITE_SCAN_ENABLE | 4450 GAP_TASK_WRITE_PAGE_TIMEOUT; 4451 #endif 4452 4453 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4454 hci_stack->classic_read_local_oob_data = false; 4455 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 4456 #endif 4457 4458 // LE 4459 #ifdef ENABLE_BLE 4460 memset(hci_stack->le_random_address, 0, 6); 4461 hci_stack->le_random_address_set = 0; 4462 #endif 4463 #ifdef ENABLE_LE_CENTRAL 4464 hci_stack->le_scanning_active = false; 4465 hci_stack->le_scanning_param_update = true; 4466 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4467 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 4468 hci_stack->le_whitelist_capacity = 0; 4469 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4470 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 4471 #endif 4472 #endif 4473 #ifdef ENABLE_LE_PERIPHERAL 4474 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4475 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 4476 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4477 } 4478 if (hci_stack->le_advertisements_data != NULL){ 4479 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4480 } 4481 #endif 4482 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4483 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION; 4484 #endif 4485 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4486 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4487 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_INVALID; 4488 #endif 4489 } 4490 4491 #ifdef ENABLE_CLASSIC 4492 /** 4493 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4494 */ 4495 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4496 // store and open remote device db 4497 hci_stack->link_key_db = link_key_db; 4498 if (hci_stack->link_key_db) { 4499 hci_stack->link_key_db->open(); 4500 } 4501 } 4502 #endif 4503 4504 void hci_init(const hci_transport_t *transport, const void *config){ 4505 4506 #ifdef HAVE_MALLOC 4507 if (!hci_stack) { 4508 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4509 } 4510 #else 4511 hci_stack = &hci_stack_static; 4512 #endif 4513 memset(hci_stack, 0, sizeof(hci_stack_t)); 4514 4515 // reference to use transport layer implementation 4516 hci_stack->hci_transport = transport; 4517 4518 // reference to used config 4519 hci_stack->config = config; 4520 4521 // setup pointer for outgoing packet buffer 4522 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4523 4524 // max acl payload size defined in config.h 4525 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4526 4527 // register packet handlers with transport 4528 transport->register_packet_handler(&packet_handler); 4529 4530 hci_stack->state = HCI_STATE_OFF; 4531 4532 // class of device 4533 hci_stack->class_of_device = 0x007a020c; // Smartphone 4534 4535 // bondable by default 4536 hci_stack->bondable = 1; 4537 4538 #ifdef ENABLE_CLASSIC 4539 // classic name 4540 hci_stack->local_name = default_classic_name; 4541 4542 // Master slave policy 4543 hci_stack->master_slave_policy = 1; 4544 4545 // Allow Role Switch 4546 hci_stack->allow_role_switch = 1; 4547 4548 // Default / minimum security level = 2 4549 hci_stack->gap_security_level = LEVEL_2; 4550 4551 // Default Security Mode 4 4552 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4553 4554 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4555 hci_stack->gap_required_encyrption_key_size = 7; 4556 4557 // Link Supervision Timeout 4558 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4559 4560 #endif 4561 4562 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4563 hci_stack->ssp_enable = 1; 4564 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4565 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4566 hci_stack->ssp_auto_accept = 1; 4567 4568 // Secure Connections: enable (requires support from Controller) 4569 hci_stack->secure_connections_enable = true; 4570 4571 // voice setting - signed 16 bit pcm data with CVSD over the air 4572 hci_stack->sco_voice_setting = 0x60; 4573 4574 #ifdef ENABLE_LE_CENTRAL 4575 // connection parameter to use for outgoing connections 4576 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4577 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4578 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4579 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4580 hci_stack->le_connection_latency = 4; // 4 4581 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4582 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4583 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4584 4585 // default LE Scanning 4586 hci_stack->le_scan_type = 0x1; // active 4587 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4588 hci_stack->le_scan_window = 0x30; // 30 ms 4589 #endif 4590 4591 #ifdef ENABLE_LE_PERIPHERAL 4592 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4593 #endif 4594 4595 // connection parameter range used to answer connection parameter update requests in l2cap 4596 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4597 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4598 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4599 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4600 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4601 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4602 4603 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4604 hci_stack->iso_packets_to_queue = 1; 4605 #endif 4606 4607 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4608 hci_stack->le_privacy_mode = LE_PRIVACY_MODE_DEVICE; 4609 #endif 4610 4611 hci_state_reset(); 4612 } 4613 4614 void hci_deinit(void){ 4615 btstack_run_loop_remove_timer(&hci_stack->timeout); 4616 #ifdef HAVE_MALLOC 4617 if (hci_stack) { 4618 free(hci_stack); 4619 } 4620 #endif 4621 hci_stack = NULL; 4622 4623 #ifdef ENABLE_CLASSIC 4624 disable_l2cap_timeouts = 0; 4625 #endif 4626 } 4627 4628 /** 4629 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4630 */ 4631 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4632 hci_stack->chipset = chipset_driver; 4633 4634 // reset chipset driver - init is also called on power_up 4635 if (hci_stack->chipset && hci_stack->chipset->init){ 4636 hci_stack->chipset->init(hci_stack->config); 4637 } 4638 } 4639 4640 /** 4641 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4642 */ 4643 void hci_set_control(const btstack_control_t *hardware_control){ 4644 // references to used control implementation 4645 hci_stack->control = hardware_control; 4646 // init with transport config 4647 hardware_control->init(hci_stack->config); 4648 } 4649 4650 static void hci_discard_connections(void){ 4651 btstack_linked_list_iterator_t it; 4652 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4653 while (btstack_linked_list_iterator_has_next(&it)){ 4654 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4655 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4656 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4657 hci_shutdown_connection(connection); 4658 } 4659 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4660 while (hci_stack->iso_streams != NULL){ 4661 hci_iso_stream_finalize((hci_iso_stream_t *) hci_stack->iso_streams); 4662 } 4663 #endif 4664 } 4665 4666 void hci_close(void){ 4667 4668 #ifdef ENABLE_CLASSIC 4669 // close remote device db 4670 if (hci_stack->link_key_db) { 4671 hci_stack->link_key_db->close(); 4672 } 4673 #endif 4674 4675 hci_discard_connections(); 4676 4677 hci_power_control(HCI_POWER_OFF); 4678 4679 #ifdef HAVE_MALLOC 4680 free(hci_stack); 4681 #endif 4682 hci_stack = NULL; 4683 } 4684 4685 #ifdef HAVE_SCO_TRANSPORT 4686 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4687 hci_stack->sco_transport = sco_transport; 4688 sco_transport->register_packet_handler(&packet_handler); 4689 } 4690 #endif 4691 4692 #ifdef ENABLE_CLASSIC 4693 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4694 // validate ranage and set 4695 if (encryption_key_size < 7) return; 4696 if (encryption_key_size > 16) return; 4697 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4698 } 4699 4700 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4701 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4702 hci_stack->gap_security_mode = security_mode; 4703 return ERROR_CODE_SUCCESS; 4704 } else { 4705 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4706 } 4707 } 4708 4709 gap_security_mode_t gap_get_security_mode(void){ 4710 return hci_stack->gap_security_mode; 4711 } 4712 4713 void gap_set_security_level(gap_security_level_t security_level){ 4714 hci_stack->gap_security_level = security_level; 4715 } 4716 4717 gap_security_level_t gap_get_security_level(void){ 4718 if (hci_stack->gap_secure_connections_only_mode){ 4719 return LEVEL_4; 4720 } 4721 return hci_stack->gap_security_level; 4722 } 4723 4724 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4725 hci_stack->gap_minimal_service_security_level = security_level; 4726 } 4727 4728 void gap_set_secure_connections_only_mode(bool enable){ 4729 hci_stack->gap_secure_connections_only_mode = enable; 4730 } 4731 4732 bool gap_get_secure_connections_only_mode(void){ 4733 return hci_stack->gap_secure_connections_only_mode; 4734 } 4735 #endif 4736 4737 #ifdef ENABLE_CLASSIC 4738 void gap_set_class_of_device(uint32_t class_of_device){ 4739 hci_stack->class_of_device = class_of_device; 4740 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4741 hci_run(); 4742 } 4743 4744 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4745 hci_stack->default_link_policy_settings = default_link_policy_settings; 4746 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4747 hci_run(); 4748 } 4749 4750 void gap_set_allow_role_switch(bool allow_role_switch){ 4751 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4752 } 4753 4754 uint8_t hci_get_allow_role_switch(void){ 4755 return hci_stack->allow_role_switch; 4756 } 4757 4758 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4759 hci_stack->link_supervision_timeout = link_supervision_timeout; 4760 } 4761 4762 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4763 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4764 } 4765 4766 uint16_t hci_automatic_flush_timeout(void){ 4767 return hci_stack->automatic_flush_timeout; 4768 } 4769 4770 void hci_disable_l2cap_timeout_check(void){ 4771 disable_l2cap_timeouts = 1; 4772 } 4773 #endif 4774 4775 #ifndef HAVE_HOST_CONTROLLER_API 4776 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4777 void hci_set_bd_addr(bd_addr_t addr){ 4778 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4779 hci_stack->custom_bd_addr_set = 1; 4780 } 4781 #endif 4782 4783 // State-Module-Driver overview 4784 // state module low-level 4785 // HCI_STATE_OFF off close 4786 // HCI_STATE_INITIALIZING, on open 4787 // HCI_STATE_WORKING, on open 4788 // HCI_STATE_HALTING, on open 4789 // HCI_STATE_SLEEPING, off/sleep close 4790 // HCI_STATE_FALLING_ASLEEP on open 4791 4792 static int hci_power_control_on(void){ 4793 4794 // power on 4795 int err = 0; 4796 if (hci_stack->control && hci_stack->control->on){ 4797 err = (*hci_stack->control->on)(); 4798 } 4799 if (err){ 4800 log_error( "POWER_ON failed"); 4801 hci_emit_hci_open_failed(); 4802 return err; 4803 } 4804 4805 // int chipset driver 4806 if (hci_stack->chipset && hci_stack->chipset->init){ 4807 hci_stack->chipset->init(hci_stack->config); 4808 } 4809 4810 // init transport 4811 if (hci_stack->hci_transport->init){ 4812 hci_stack->hci_transport->init(hci_stack->config); 4813 } 4814 4815 // open transport 4816 err = hci_stack->hci_transport->open(); 4817 if (err){ 4818 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4819 if (hci_stack->control && hci_stack->control->off){ 4820 (*hci_stack->control->off)(); 4821 } 4822 hci_emit_hci_open_failed(); 4823 return err; 4824 } 4825 return 0; 4826 } 4827 4828 static void hci_power_control_off(void){ 4829 4830 log_info("hci_power_control_off"); 4831 4832 // close low-level device 4833 hci_stack->hci_transport->close(); 4834 4835 log_info("hci_power_control_off - hci_transport closed"); 4836 4837 // power off 4838 if (hci_stack->control && hci_stack->control->off){ 4839 (*hci_stack->control->off)(); 4840 } 4841 4842 log_info("hci_power_control_off - control closed"); 4843 4844 hci_stack->state = HCI_STATE_OFF; 4845 } 4846 4847 static void hci_power_control_sleep(void){ 4848 4849 log_info("hci_power_control_sleep"); 4850 4851 #if 0 4852 // don't close serial port during sleep 4853 4854 // close low-level device 4855 hci_stack->hci_transport->close(hci_stack->config); 4856 #endif 4857 4858 // sleep mode 4859 if (hci_stack->control && hci_stack->control->sleep){ 4860 (*hci_stack->control->sleep)(); 4861 } 4862 4863 hci_stack->state = HCI_STATE_SLEEPING; 4864 } 4865 4866 static int hci_power_control_wake(void){ 4867 4868 log_info("hci_power_control_wake"); 4869 4870 // wake on 4871 if (hci_stack->control && hci_stack->control->wake){ 4872 (*hci_stack->control->wake)(); 4873 } 4874 4875 #if 0 4876 // open low-level device 4877 int err = hci_stack->hci_transport->open(hci_stack->config); 4878 if (err){ 4879 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4880 if (hci_stack->control && hci_stack->control->off){ 4881 (*hci_stack->control->off)(); 4882 } 4883 hci_emit_hci_open_failed(); 4884 return err; 4885 } 4886 #endif 4887 4888 return 0; 4889 } 4890 4891 static void hci_power_enter_initializing_state(void){ 4892 // set up state machine 4893 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4894 hci_stack->hci_packet_buffer_reserved = false; 4895 hci_stack->state = HCI_STATE_INITIALIZING; 4896 hci_stack->substate = HCI_INIT_SEND_RESET; 4897 } 4898 4899 static void hci_power_enter_halting_state(void){ 4900 #ifdef ENABLE_BLE 4901 // drop entries scheduled for removal, mark others for re-adding 4902 btstack_linked_list_iterator_t it; 4903 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4904 while (btstack_linked_list_iterator_has_next(&it)){ 4905 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4906 if ((entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)) == LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4907 btstack_linked_list_iterator_remove(&it); 4908 btstack_memory_whitelist_entry_free(entry); 4909 } else { 4910 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4911 } 4912 } 4913 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4914 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 4915 const uint8_t mask = LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 4916 while (btstack_linked_list_iterator_has_next(&it)){ 4917 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 4918 if ((entry->state & mask) == LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER) { 4919 btstack_linked_list_iterator_remove(&it); 4920 btstack_memory_periodic_advertiser_list_entry_free(entry); 4921 } else { 4922 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 4923 continue; 4924 } 4925 } 4926 #endif 4927 #endif 4928 // see hci_run 4929 hci_stack->state = HCI_STATE_HALTING; 4930 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4931 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4932 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4933 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4934 btstack_run_loop_add_timer(&hci_stack->timeout); 4935 } 4936 4937 // returns error 4938 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4939 int err; 4940 switch (power_mode){ 4941 case HCI_POWER_ON: 4942 err = hci_power_control_on(); 4943 if (err != 0) { 4944 log_error("hci_power_control_on() error %d", err); 4945 return err; 4946 } 4947 hci_power_enter_initializing_state(); 4948 break; 4949 case HCI_POWER_OFF: 4950 // do nothing 4951 break; 4952 case HCI_POWER_SLEEP: 4953 // do nothing (with SLEEP == OFF) 4954 break; 4955 default: 4956 btstack_assert(false); 4957 break; 4958 } 4959 return ERROR_CODE_SUCCESS; 4960 } 4961 4962 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4963 switch (power_mode){ 4964 case HCI_POWER_ON: 4965 // do nothing 4966 break; 4967 case HCI_POWER_OFF: 4968 // no connections yet, just turn it off 4969 hci_power_control_off(); 4970 break; 4971 case HCI_POWER_SLEEP: 4972 // no connections yet, just turn it off 4973 hci_power_control_sleep(); 4974 break; 4975 default: 4976 btstack_assert(false); 4977 break; 4978 } 4979 return ERROR_CODE_SUCCESS; 4980 } 4981 4982 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4983 switch (power_mode){ 4984 case HCI_POWER_ON: 4985 // do nothing 4986 break; 4987 case HCI_POWER_OFF: 4988 hci_power_enter_halting_state(); 4989 break; 4990 case HCI_POWER_SLEEP: 4991 // see hci_run 4992 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4993 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4994 break; 4995 default: 4996 btstack_assert(false); 4997 break; 4998 } 4999 return ERROR_CODE_SUCCESS; 5000 } 5001 5002 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 5003 switch (power_mode){ 5004 case HCI_POWER_ON: 5005 hci_power_enter_initializing_state(); 5006 break; 5007 case HCI_POWER_OFF: 5008 // do nothing 5009 break; 5010 case HCI_POWER_SLEEP: 5011 // see hci_run 5012 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 5013 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 5014 break; 5015 default: 5016 btstack_assert(false); 5017 break; 5018 } 5019 return ERROR_CODE_SUCCESS; 5020 } 5021 5022 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 5023 switch (power_mode){ 5024 case HCI_POWER_ON: 5025 hci_power_enter_initializing_state(); 5026 break; 5027 case HCI_POWER_OFF: 5028 hci_power_enter_halting_state(); 5029 break; 5030 case HCI_POWER_SLEEP: 5031 // do nothing 5032 break; 5033 default: 5034 btstack_assert(false); 5035 break; 5036 } 5037 return ERROR_CODE_SUCCESS; 5038 } 5039 5040 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 5041 int err; 5042 switch (power_mode){ 5043 case HCI_POWER_ON: 5044 err = hci_power_control_wake(); 5045 if (err) return err; 5046 hci_power_enter_initializing_state(); 5047 break; 5048 case HCI_POWER_OFF: 5049 hci_power_enter_halting_state(); 5050 break; 5051 case HCI_POWER_SLEEP: 5052 // do nothing 5053 break; 5054 default: 5055 btstack_assert(false); 5056 break; 5057 } 5058 return ERROR_CODE_SUCCESS; 5059 } 5060 5061 int hci_power_control(HCI_POWER_MODE power_mode){ 5062 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 5063 btstack_run_loop_remove_timer(&hci_stack->timeout); 5064 int err = 0; 5065 switch (hci_stack->state){ 5066 case HCI_STATE_OFF: 5067 err = hci_power_control_state_off(power_mode); 5068 break; 5069 case HCI_STATE_INITIALIZING: 5070 err = hci_power_control_state_initializing(power_mode); 5071 break; 5072 case HCI_STATE_WORKING: 5073 err = hci_power_control_state_working(power_mode); 5074 break; 5075 case HCI_STATE_HALTING: 5076 err = hci_power_control_state_halting(power_mode); 5077 break; 5078 case HCI_STATE_FALLING_ASLEEP: 5079 err = hci_power_control_state_falling_asleep(power_mode); 5080 break; 5081 case HCI_STATE_SLEEPING: 5082 err = hci_power_control_state_sleeping(power_mode); 5083 break; 5084 default: 5085 btstack_assert(false); 5086 break; 5087 } 5088 if (err != 0){ 5089 return err; 5090 } 5091 5092 // create internal event 5093 hci_emit_state(); 5094 5095 // trigger next/first action 5096 hci_run(); 5097 5098 return 0; 5099 } 5100 5101 5102 static void hci_halting_run(void) { 5103 5104 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5105 5106 hci_connection_t *connection; 5107 #ifdef ENABLE_BLE 5108 #ifdef ENABLE_LE_PERIPHERAL 5109 bool stop_advertismenets; 5110 #endif 5111 #endif 5112 5113 switch (hci_stack->substate) { 5114 case HCI_HALTING_CLASSIC_STOP: 5115 #ifdef ENABLE_CLASSIC 5116 if (!hci_can_send_command_packet_now()) return; 5117 5118 if (hci_stack->connectable || hci_stack->discoverable){ 5119 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 5120 hci_send_cmd(&hci_write_scan_enable, 0); 5121 return; 5122 } 5123 #endif 5124 /* fall through */ 5125 5126 case HCI_HALTING_LE_ADV_STOP: 5127 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 5128 5129 #ifdef ENABLE_BLE 5130 #ifdef ENABLE_LE_PERIPHERAL 5131 if (!hci_can_send_command_packet_now()) return; 5132 5133 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 5134 5135 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5136 if (hci_extended_advertising_supported()){ 5137 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5138 btstack_linked_list_iterator_t it; 5139 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5140 // stop all periodic advertisements and check if an extended set is active 5141 while (btstack_linked_list_iterator_has_next(&it)){ 5142 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5143 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5144 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5145 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 5146 return; 5147 } 5148 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5149 stop_advertismenets = true; 5150 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5151 } 5152 } 5153 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5154 if (stop_advertismenets){ 5155 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5156 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 5157 return; 5158 } 5159 } 5160 else 5161 #else /* ENABLE_LE_PERIPHERAL */ 5162 { 5163 if (stop_advertismenets) { 5164 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5165 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5166 return; 5167 } 5168 } 5169 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 5170 #endif /* ENABLE_LE_PERIPHERAL */ 5171 #endif /* ENABLE_BLE */ 5172 5173 /* fall through */ 5174 5175 case HCI_HALTING_LE_SCAN_STOP: 5176 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 5177 if (!hci_can_send_command_packet_now()) return; 5178 5179 #ifdef ENABLE_BLE 5180 #ifdef ENABLE_LE_CENTRAL 5181 if (hci_stack->le_scanning_active){ 5182 hci_le_scan_stop(); 5183 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 5184 return; 5185 } 5186 #endif 5187 #endif 5188 5189 /* fall through */ 5190 5191 case HCI_HALTING_DISCONNECT_ALL: 5192 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 5193 if (!hci_can_send_command_packet_now()) return; 5194 5195 // close all open connections 5196 connection = (hci_connection_t *) hci_stack->connections; 5197 if (connection) { 5198 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5199 5200 log_info("HCI_STATE_HALTING, connection %p, handle %u, state %u", connection, con_handle, connection->state); 5201 5202 // check state 5203 switch(connection->state) { 5204 case SENT_DISCONNECT: 5205 case RECEIVED_DISCONNECTION_COMPLETE: 5206 // wait until connection is gone 5207 return; 5208 default: 5209 break; 5210 } 5211 5212 // finally, send the disconnect command 5213 connection->state = SENT_DISCONNECT; 5214 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5215 return; 5216 } 5217 5218 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5219 // stop BIGs and BIG Syncs 5220 if (hci_stack->le_audio_bigs != NULL){ 5221 le_audio_big_t * big = (le_audio_big_t*) hci_stack->le_audio_bigs; 5222 if (big->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5223 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5224 hci_send_cmd(&hci_le_terminate_big, big->big_handle); 5225 return; 5226 } 5227 if (hci_stack->le_audio_big_syncs != NULL){ 5228 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t*) hci_stack->le_audio_big_syncs; 5229 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5230 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5231 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 5232 return; 5233 } 5234 #endif 5235 5236 btstack_run_loop_remove_timer(&hci_stack->timeout); 5237 5238 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5239 log_info("HCI_STATE_HALTING: wait 50 ms"); 5240 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 5241 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5242 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5243 btstack_run_loop_add_timer(&hci_stack->timeout); 5244 break; 5245 5246 case HCI_HALTING_W4_CLOSE_TIMER: 5247 // keep waiting 5248 break; 5249 5250 case HCI_HALTING_CLOSE: 5251 // close left over connections (that had not been properly closed before) 5252 hci_stack->substate = HCI_HALTING_CLOSE_DISCARDING_CONNECTIONS; 5253 hci_discard_connections(); 5254 5255 log_info("HCI_STATE_HALTING, calling off"); 5256 5257 // switch mode 5258 hci_power_control_off(); 5259 5260 log_info("HCI_STATE_HALTING, emitting state"); 5261 hci_emit_state(); 5262 log_info("HCI_STATE_HALTING, done"); 5263 break; 5264 5265 default: 5266 break; 5267 } 5268 }; 5269 5270 static void hci_falling_asleep_run(void){ 5271 hci_connection_t * connection; 5272 switch(hci_stack->substate) { 5273 case HCI_FALLING_ASLEEP_DISCONNECT: 5274 log_info("HCI_STATE_FALLING_ASLEEP"); 5275 // close all open connections 5276 connection = (hci_connection_t *) hci_stack->connections; 5277 if (connection){ 5278 5279 // send disconnect 5280 if (!hci_can_send_command_packet_now()) return; 5281 5282 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5283 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5284 5285 // send disconnected event right away - causes higher layer connections to get closed, too. 5286 hci_shutdown_connection(connection); 5287 return; 5288 } 5289 5290 if (hci_classic_supported()){ 5291 // disable page and inquiry scan 5292 if (!hci_can_send_command_packet_now()) return; 5293 5294 log_info("HCI_STATE_HALTING, disabling inq scans"); 5295 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5296 5297 // continue in next sub state 5298 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5299 break; 5300 } 5301 5302 /* fall through */ 5303 5304 case HCI_FALLING_ASLEEP_COMPLETE: 5305 log_info("HCI_STATE_HALTING, calling sleep"); 5306 // switch mode 5307 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5308 hci_emit_state(); 5309 break; 5310 5311 default: 5312 break; 5313 } 5314 } 5315 5316 #ifdef ENABLE_CLASSIC 5317 5318 static void hci_update_scan_enable(void){ 5319 // 2 = page scan, 1 = inq scan 5320 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 5321 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 5322 hci_run(); 5323 } 5324 5325 void gap_discoverable_control(uint8_t enable){ 5326 if (enable) enable = 1; // normalize argument 5327 5328 if (hci_stack->discoverable == enable){ 5329 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 5330 return; 5331 } 5332 5333 hci_stack->discoverable = enable; 5334 hci_update_scan_enable(); 5335 } 5336 5337 void gap_connectable_control(uint8_t enable){ 5338 if (enable) enable = 1; // normalize argument 5339 5340 // don't emit event 5341 if (hci_stack->connectable == enable) return; 5342 5343 hci_stack->connectable = enable; 5344 hci_update_scan_enable(); 5345 } 5346 #endif 5347 5348 void gap_local_bd_addr(bd_addr_t address_buffer){ 5349 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 5350 } 5351 5352 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5353 static void hci_host_num_completed_packets(void){ 5354 5355 // create packet manually as arrays are not supported and num_commands should not get reduced 5356 hci_reserve_packet_buffer(); 5357 uint8_t * packet = hci_get_outgoing_packet_buffer(); 5358 5359 uint16_t size = 0; 5360 uint16_t num_handles = 0; 5361 packet[size++] = 0x35; 5362 packet[size++] = 0x0c; 5363 size++; // skip param len 5364 size++; // skip num handles 5365 5366 // add { handle, packets } entries 5367 btstack_linked_item_t * it; 5368 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 5369 hci_connection_t * connection = (hci_connection_t *) it; 5370 if (connection->num_packets_completed){ 5371 little_endian_store_16(packet, size, connection->con_handle); 5372 size += 2; 5373 little_endian_store_16(packet, size, connection->num_packets_completed); 5374 size += 2; 5375 // 5376 num_handles++; 5377 connection->num_packets_completed = 0; 5378 } 5379 } 5380 5381 packet[2] = size - 3; 5382 packet[3] = num_handles; 5383 5384 hci_stack->host_completed_packets = 0; 5385 5386 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5387 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5388 5389 // release packet buffer for synchronous transport implementations 5390 if (hci_transport_synchronous()){ 5391 hci_release_packet_buffer(); 5392 hci_emit_transport_packet_sent(); 5393 } 5394 } 5395 #endif 5396 5397 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 5398 UNUSED(ds); 5399 hci_stack->substate = HCI_HALTING_CLOSE; 5400 hci_halting_run(); 5401 } 5402 5403 static bool hci_run_acl_fragments(void){ 5404 if (hci_stack->acl_fragmentation_total_size > 0u) { 5405 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 5406 hci_connection_t *connection = hci_connection_for_handle(con_handle); 5407 if (connection) { 5408 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 5409 hci_send_acl_packet_fragments(connection); 5410 return true; 5411 } 5412 } else { 5413 // connection gone -> discard further fragments 5414 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 5415 hci_stack->acl_fragmentation_total_size = 0; 5416 hci_stack->acl_fragmentation_pos = 0; 5417 } 5418 } 5419 return false; 5420 } 5421 5422 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5423 static bool hci_run_iso_fragments(void){ 5424 if (hci_stack->iso_fragmentation_total_size > 0u) { 5425 // TODO: flow control 5426 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 5427 hci_send_iso_packet_fragments(); 5428 return true; 5429 } 5430 } 5431 return false; 5432 } 5433 #endif 5434 5435 #ifdef ENABLE_CLASSIC 5436 5437 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5438 static bool hci_classic_operation_active(void) { 5439 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 5440 return true; 5441 } 5442 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 5443 return true; 5444 } 5445 btstack_linked_item_t * it; 5446 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 5447 hci_connection_t *connection = (hci_connection_t *) it; 5448 switch (connection->state) { 5449 case SENT_CREATE_CONNECTION: 5450 case SENT_CANCEL_CONNECTION: 5451 case SENT_DISCONNECT: 5452 return true; 5453 default: 5454 break; 5455 } 5456 } 5457 return false; 5458 } 5459 #endif 5460 5461 static bool hci_run_general_gap_classic(void){ 5462 5463 // assert stack is working and classic is active 5464 if (hci_classic_supported() == false) return false; 5465 if (hci_stack->state != HCI_STATE_WORKING) return false; 5466 5467 // decline incoming connections 5468 if (hci_stack->decline_reason){ 5469 uint8_t reason = hci_stack->decline_reason; 5470 hci_stack->decline_reason = 0; 5471 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 5472 return true; 5473 } 5474 5475 if (hci_stack->gap_tasks_classic != 0){ 5476 hci_run_gap_tasks_classic(); 5477 return true; 5478 } 5479 5480 // start/stop inquiry 5481 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 5482 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5483 if (hci_classic_operation_active() == false) 5484 #endif 5485 { 5486 uint8_t duration = hci_stack->inquiry_state; 5487 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 5488 if (hci_stack->inquiry_max_period_length != 0){ 5489 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); 5490 } else { 5491 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 5492 } 5493 return true; 5494 } 5495 } 5496 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 5497 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5498 hci_send_cmd(&hci_inquiry_cancel); 5499 return true; 5500 } 5501 5502 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 5503 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5504 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 5505 return true; 5506 } 5507 5508 // remote name request 5509 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 5510 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5511 if (hci_classic_operation_active() == false) 5512 #endif 5513 { 5514 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 5515 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 5516 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 5517 return true; 5518 } 5519 } 5520 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5521 // Local OOB data 5522 if (hci_stack->classic_read_local_oob_data){ 5523 hci_stack->classic_read_local_oob_data = false; 5524 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 5525 hci_send_cmd(&hci_read_local_extended_oob_data); 5526 } else { 5527 hci_send_cmd(&hci_read_local_oob_data); 5528 } 5529 } 5530 #endif 5531 // pairing 5532 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 5533 uint8_t state = hci_stack->gap_pairing_state; 5534 uint8_t pin_code[16]; 5535 switch (state){ 5536 case GAP_PAIRING_STATE_SEND_PIN: 5537 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5538 memset(pin_code, 0, 16); 5539 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 5540 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 5541 break; 5542 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 5543 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5544 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 5545 break; 5546 case GAP_PAIRING_STATE_SEND_PASSKEY: 5547 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5548 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 5549 break; 5550 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5551 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5552 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5553 break; 5554 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5555 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5556 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5557 break; 5558 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5559 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5560 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5561 break; 5562 default: 5563 break; 5564 } 5565 return true; 5566 } 5567 return false; 5568 } 5569 #endif 5570 5571 #ifdef ENABLE_BLE 5572 5573 #ifdef ENABLE_LE_CENTRAL 5574 static void hci_le_scan_stop(void){ 5575 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5576 if (hci_extended_advertising_supported()) { 5577 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5578 } else 5579 #endif 5580 { 5581 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5582 } 5583 } 5584 5585 static void 5586 hci_send_le_create_connection(uint8_t initiator_filter_policy, bd_addr_type_t address_type, uint8_t *address) { 5587 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5588 if (hci_extended_advertising_supported()) { 5589 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 5590 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 5591 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 5592 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 5593 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 5594 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 5595 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 5596 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 5597 hci_send_cmd(&hci_le_extended_create_connection, 5598 initiator_filter_policy, 5599 hci_stack->le_connection_own_addr_type, // our addr type: 5600 address_type, // peer address type 5601 address, // peer bd addr 5602 1, // initiating PHY - 1M 5603 le_connection_scan_interval, // conn scan interval 5604 le_connection_scan_window, // conn scan windows 5605 le_connection_interval_min, // conn interval min 5606 le_connection_interval_max, // conn interval max 5607 le_connection_latency, // conn latency 5608 le_supervision_timeout, // conn latency 5609 le_minimum_ce_length, // min ce length 5610 le_maximum_ce_length // max ce length 5611 ); 5612 } 5613 else 5614 #endif 5615 { 5616 hci_send_cmd(&hci_le_create_connection, 5617 hci_stack->le_connection_scan_interval, // conn scan interval 5618 hci_stack->le_connection_scan_window, // conn scan windows 5619 initiator_filter_policy, // don't use whitelist 5620 address_type, // peer address type 5621 address, // peer bd addr 5622 hci_stack->le_connection_own_addr_type, // our addr type: 5623 hci_stack->le_connection_interval_min, // conn interval min 5624 hci_stack->le_connection_interval_max, // conn interval max 5625 hci_stack->le_connection_latency, // conn latency 5626 hci_stack->le_supervision_timeout, // conn latency 5627 hci_stack->le_minimum_ce_length, // min ce length 5628 hci_stack->le_maximum_ce_length // max ce length 5629 ); 5630 } 5631 } 5632 #endif 5633 5634 #ifdef ENABLE_LE_PERIPHERAL 5635 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5636 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5637 uint8_t operation = 0; 5638 if (pos == 0){ 5639 // first fragment or complete data 5640 operation |= 1; 5641 } 5642 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5643 // last fragment or complete data 5644 operation |= 2; 5645 } 5646 return operation; 5647 } 5648 #endif 5649 #endif 5650 5651 static bool hci_run_general_gap_le(void){ 5652 5653 btstack_linked_list_iterator_t lit; 5654 5655 // Phase 1: collect what to stop 5656 5657 #ifdef ENABLE_LE_CENTRAL 5658 bool scanning_stop = false; 5659 bool connecting_stop = false; 5660 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5661 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5662 bool periodic_sync_stop = false; 5663 #endif 5664 #endif 5665 #endif 5666 5667 #ifdef ENABLE_LE_PERIPHERAL 5668 bool advertising_stop = false; 5669 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5670 le_advertising_set_t * advertising_stop_set = NULL; 5671 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5672 bool periodic_advertising_stop = false; 5673 #endif 5674 #endif 5675 #endif 5676 5677 // check if own address changes 5678 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5679 5680 // check if whitelist needs modification 5681 bool whitelist_modification_pending = false; 5682 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5683 while (btstack_linked_list_iterator_has_next(&lit)){ 5684 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5685 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5686 whitelist_modification_pending = true; 5687 break; 5688 } 5689 } 5690 5691 // check if resolving list needs modification 5692 bool resolving_list_modification_pending = false; 5693 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5694 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5695 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5696 resolving_list_modification_pending = true; 5697 } 5698 #endif 5699 5700 #ifdef ENABLE_LE_CENTRAL 5701 5702 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5703 // check if periodic advertiser list needs modification 5704 bool periodic_list_modification_pending = false; 5705 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5706 while (btstack_linked_list_iterator_has_next(&lit)){ 5707 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5708 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5709 periodic_list_modification_pending = true; 5710 break; 5711 } 5712 } 5713 #endif 5714 5715 // scanning control 5716 if (hci_stack->le_scanning_active) { 5717 // stop if: 5718 // - parameter change required 5719 // - it's disabled 5720 // - whitelist change required but used for scanning 5721 // - resolving list modified 5722 // - own address changes 5723 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5724 if ((hci_stack->le_scanning_param_update) || 5725 !hci_stack->le_scanning_enabled || 5726 (scanning_uses_whitelist && whitelist_modification_pending) || 5727 resolving_list_modification_pending || 5728 random_address_change){ 5729 5730 scanning_stop = true; 5731 } 5732 } 5733 5734 // connecting control 5735 bool connecting_with_whitelist; 5736 switch (hci_stack->le_connecting_state){ 5737 case LE_CONNECTING_DIRECT: 5738 case LE_CONNECTING_WHITELIST: 5739 // stop connecting if: 5740 // - connecting uses white and whitelist modification pending 5741 // - if it got disabled 5742 // - resolving list modified 5743 // - own address changes 5744 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5745 if ((connecting_with_whitelist && whitelist_modification_pending) || 5746 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5747 resolving_list_modification_pending || 5748 random_address_change) { 5749 5750 connecting_stop = true; 5751 } 5752 break; 5753 default: 5754 break; 5755 } 5756 5757 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5758 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5759 // periodic sync control 5760 bool sync_with_advertiser_list; 5761 switch(hci_stack->le_periodic_sync_state){ 5762 case LE_CONNECTING_DIRECT: 5763 case LE_CONNECTING_WHITELIST: 5764 // stop sync if: 5765 // - sync with advertiser list and advertiser list modification pending 5766 // - if it got disabled 5767 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5768 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5769 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5770 periodic_sync_stop = true; 5771 } 5772 break; 5773 default: 5774 break; 5775 } 5776 #endif 5777 #endif 5778 5779 #endif /* ENABLE_LE_CENTRAL */ 5780 5781 #ifdef ENABLE_LE_PERIPHERAL 5782 // le advertisement control 5783 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5784 // stop if: 5785 // - parameter change required 5786 // - random address used in advertising and changes 5787 // - it's disabled 5788 // - whitelist change required but used for advertisement filter policy 5789 // - resolving list modified 5790 // - own address changes 5791 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5792 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5793 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5794 if (advertising_change || 5795 (advertising_uses_random_address && random_address_change) || 5796 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5797 (advertising_uses_whitelist && whitelist_modification_pending) || 5798 resolving_list_modification_pending || 5799 random_address_change) { 5800 5801 advertising_stop = true; 5802 } 5803 } 5804 5805 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5806 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5807 btstack_linked_list_iterator_t it; 5808 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5809 while (btstack_linked_list_iterator_has_next(&it)){ 5810 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5811 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5812 // stop if: 5813 // - parameter change required 5814 // - random address used in connectable advertising and changes 5815 // - it's disabled 5816 // - whitelist change required but used for advertisement filter policy 5817 // - resolving list modified 5818 // - own address changes 5819 // - advertisement set will be removed 5820 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5821 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5822 bool advertising_uses_random_address = 5823 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5824 advertising_connectable; 5825 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5826 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5827 bool advertising_set_random_address_change = 5828 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5829 bool advertising_set_will_be_removed = 5830 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5831 if (advertising_parameter_change || 5832 (advertising_uses_random_address && advertising_set_random_address_change) || 5833 (advertising_enabled == false) || 5834 (advertising_uses_whitelist && whitelist_modification_pending) || 5835 resolving_list_modification_pending || 5836 advertising_set_will_be_removed) { 5837 5838 advertising_stop = true; 5839 advertising_stop_set = advertising_set; 5840 break; 5841 } 5842 } 5843 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5844 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5845 // stop if: 5846 // - it's disabled 5847 // - parameter change required 5848 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5849 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5850 if ((periodic_enabled == false) || periodic_parameter_change){ 5851 periodic_advertising_stop = true; 5852 advertising_stop_set = advertising_set; 5853 } 5854 } 5855 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5856 } 5857 } 5858 #endif 5859 5860 #endif 5861 5862 5863 // Phase 2: stop everything that should be off during modifications 5864 5865 5866 // 2.1 Outgoing connection 5867 #ifdef ENABLE_LE_CENTRAL 5868 if (connecting_stop){ 5869 hci_send_cmd(&hci_le_create_connection_cancel); 5870 return true; 5871 } 5872 #endif 5873 5874 // 2.2 Scanning 5875 #ifdef ENABLE_LE_CENTRAL 5876 if (scanning_stop){ 5877 hci_stack->le_scanning_active = false; 5878 hci_le_scan_stop(); 5879 return true; 5880 } 5881 5882 // 2.3 Periodic Sync 5883 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5884 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5885 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5886 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5887 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5888 return true; 5889 } 5890 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5891 if (periodic_sync_stop){ 5892 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5893 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5894 return true; 5895 } 5896 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5897 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5898 #endif /* ENABLE_LE_CENTRAL */ 5899 5900 // 2.4 Advertising: legacy, extended, periodic 5901 #ifdef ENABLE_LE_PERIPHERAL 5902 if (advertising_stop){ 5903 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5904 if (hci_extended_advertising_supported()) { 5905 uint8_t advertising_stop_handle; 5906 if (advertising_stop_set != NULL){ 5907 advertising_stop_handle = advertising_stop_set->advertising_handle; 5908 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5909 } else { 5910 advertising_stop_handle = 0; 5911 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5912 } 5913 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5914 const uint16_t durations[] = { 0 }; 5915 const uint16_t max_events[] = { 0 }; 5916 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5917 } else 5918 #endif 5919 { 5920 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5921 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5922 } 5923 return true; 5924 } 5925 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5926 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5927 if (periodic_advertising_stop){ 5928 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5929 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5930 return true; 5931 } 5932 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5933 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5934 #endif /* ENABLE_LE_PERIPHERAL */ 5935 5936 5937 // Phase 3: modify 5938 5939 if (random_address_change){ 5940 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5941 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5942 if (hci_extended_advertising_supported()) { 5943 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5944 } 5945 #endif 5946 { 5947 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5948 } 5949 return true; 5950 } 5951 5952 #ifdef ENABLE_LE_CENTRAL 5953 if (hci_stack->le_scanning_param_update){ 5954 hci_stack->le_scanning_param_update = false; 5955 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5956 if (hci_extended_advertising_supported()){ 5957 // prepare arrays for all PHYs 5958 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5959 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5960 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5961 uint8_t scanning_phys = 1; // LE 1M PHY 5962 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5963 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5964 } else 5965 #endif 5966 { 5967 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5968 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5969 } 5970 return true; 5971 } 5972 #endif 5973 5974 #ifdef ENABLE_LE_PERIPHERAL 5975 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5976 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5977 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5978 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5979 if (hci_extended_advertising_supported()){ 5980 // map advertisment type to advertising event properties 5981 uint16_t adv_event_properties = 0; 5982 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5983 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5984 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5985 } 5986 hci_stack->le_advertising_set_in_current_command = 0; 5987 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5988 0, 5989 adv_event_properties, 5990 hci_stack->le_advertisements_interval_min, 5991 hci_stack->le_advertisements_interval_max, 5992 hci_stack->le_advertisements_channel_map, 5993 hci_stack->le_advertisements_own_addr_type, 5994 hci_stack->le_advertisements_direct_address_type, 5995 hci_stack->le_advertisements_direct_address, 5996 hci_stack->le_advertisements_filter_policy, 5997 0x7f, // tx power: no preference 5998 0x01, // primary adv phy: LE 1M 5999 0, // secondary adv max skip 6000 0, // secondary adv phy 6001 0, // adv sid 6002 0 // scan request notification 6003 ); 6004 } 6005 #endif 6006 { 6007 hci_send_cmd(&hci_le_set_advertising_parameters, 6008 hci_stack->le_advertisements_interval_min, 6009 hci_stack->le_advertisements_interval_max, 6010 hci_stack->le_advertisements_type, 6011 hci_stack->le_advertisements_own_addr_type, 6012 hci_stack->le_advertisements_direct_address_type, 6013 hci_stack->le_advertisements_direct_address, 6014 hci_stack->le_advertisements_channel_map, 6015 hci_stack->le_advertisements_filter_policy); 6016 } 6017 return true; 6018 } 6019 6020 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 6021 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6022 uint8_t adv_data_clean[31]; 6023 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 6024 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 6025 hci_stack->le_advertisements_data_len); 6026 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 6027 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6028 if (hci_extended_advertising_supported()){ 6029 hci_stack->le_advertising_set_in_current_command = 0; 6030 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 6031 } else 6032 #endif 6033 { 6034 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 6035 } 6036 return true; 6037 } 6038 6039 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 6040 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6041 uint8_t scan_data_clean[31]; 6042 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 6043 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 6044 hci_stack->le_scan_response_data_len); 6045 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 6046 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6047 if (hci_extended_advertising_supported()){ 6048 hci_stack->le_advertising_set_in_current_command = 0; 6049 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 6050 } else 6051 #endif 6052 { 6053 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 6054 } 6055 return true; 6056 } 6057 6058 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6059 if (hci_extended_advertising_supported()) { 6060 btstack_linked_list_iterator_t it; 6061 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6062 while (btstack_linked_list_iterator_has_next(&it)){ 6063 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 6064 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 6065 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 6066 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6067 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 6068 return true; 6069 } 6070 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 6071 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6072 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 6073 return true; 6074 } 6075 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 6076 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6077 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6078 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 6079 advertising_set->advertising_handle, 6080 advertising_set->extended_params.advertising_event_properties, 6081 advertising_set->extended_params.primary_advertising_interval_min, 6082 advertising_set->extended_params.primary_advertising_interval_max, 6083 advertising_set->extended_params.primary_advertising_channel_map, 6084 advertising_set->extended_params.own_address_type, 6085 advertising_set->extended_params.peer_address_type, 6086 advertising_set->extended_params.peer_address, 6087 advertising_set->extended_params.advertising_filter_policy, 6088 advertising_set->extended_params.advertising_tx_power, 6089 advertising_set->extended_params.primary_advertising_phy, 6090 advertising_set->extended_params.secondary_advertising_max_skip, 6091 advertising_set->extended_params.secondary_advertising_phy, 6092 advertising_set->extended_params.advertising_sid, 6093 advertising_set->extended_params.scan_request_notification_enable 6094 ); 6095 return true; 6096 } 6097 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 6098 uint16_t pos = advertising_set->adv_data_pos; 6099 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 6100 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6101 if ((operation & 0x02) != 0){ 6102 // last fragment or complete data 6103 operation |= 2; 6104 advertising_set->adv_data_pos = 0; 6105 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6106 } else { 6107 advertising_set->adv_data_pos += data_to_upload; 6108 } 6109 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6110 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 6111 return true; 6112 } 6113 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 6114 uint16_t pos = advertising_set->scan_data_pos; 6115 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 6116 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6117 if ((operation & 0x02) != 0){ 6118 advertising_set->scan_data_pos = 0; 6119 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6120 } else { 6121 advertising_set->scan_data_pos += data_to_upload; 6122 } 6123 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6124 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]); 6125 return true; 6126 } 6127 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6128 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 6129 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6130 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6131 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 6132 advertising_set->advertising_handle, 6133 advertising_set->periodic_params.periodic_advertising_interval_min, 6134 advertising_set->periodic_params.periodic_advertising_interval_max, 6135 advertising_set->periodic_params.periodic_advertising_properties); 6136 return true; 6137 } 6138 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 6139 uint16_t pos = advertising_set->periodic_data_pos; 6140 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 6141 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6142 if ((operation & 0x02) != 0){ 6143 // last fragment or complete data 6144 operation |= 2; 6145 advertising_set->periodic_data_pos = 0; 6146 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6147 } else { 6148 advertising_set->periodic_data_pos += data_to_upload; 6149 } 6150 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6151 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 6152 return true; 6153 } 6154 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6155 } 6156 } 6157 #endif 6158 6159 #endif 6160 6161 #ifdef ENABLE_LE_CENTRAL 6162 // if connect with whitelist was active and is not cancelled yet, wait until next time 6163 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 6164 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6165 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 6166 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 6167 #endif 6168 #endif 6169 6170 // LE Whitelist Management 6171 if (whitelist_modification_pending){ 6172 // add/remove entries 6173 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6174 while (btstack_linked_list_iterator_has_next(&lit)){ 6175 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6176 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 6177 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6178 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 6179 return true; 6180 } 6181 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 6182 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 6183 entry->state |= LE_WHITELIST_ON_CONTROLLER; 6184 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 6185 return true; 6186 } 6187 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 6188 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6189 btstack_memory_whitelist_entry_free(entry); 6190 } 6191 } 6192 } 6193 6194 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6195 // LE Resolving List Management 6196 if (resolving_list_supported) { 6197 uint16_t i; 6198 switch (hci_stack->le_resolving_list_state) { 6199 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 6200 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6201 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 6202 return true; 6203 case LE_RESOLVING_LIST_READ_SIZE: 6204 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 6205 hci_send_cmd(&hci_le_read_resolving_list_size); 6206 return true; 6207 case LE_RESOLVING_LIST_SEND_CLEAR: 6208 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_UPDATES_ENTRIES; 6209 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 6210 sizeof(hci_stack->le_resolving_list_add_entries)); 6211 (void) memset(hci_stack->le_resolving_list_set_privacy_mode, 0xff, 6212 sizeof(hci_stack->le_resolving_list_set_privacy_mode)); 6213 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 6214 sizeof(hci_stack->le_resolving_list_remove_entries)); 6215 hci_send_cmd(&hci_le_clear_resolving_list); 6216 return true; 6217 case LE_RESOLVING_LIST_UPDATES_ENTRIES: 6218 // first remove old entries 6219 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6220 uint8_t offset = i >> 3; 6221 uint8_t mask = 1 << (i & 7); 6222 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 6223 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 6224 bd_addr_t peer_identity_addreses; 6225 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6226 sm_key_t peer_irk; 6227 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6228 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6229 6230 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 6231 // trigger whitelist entry 'update' (work around for controller bug) 6232 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6233 while (btstack_linked_list_iterator_has_next(&lit)) { 6234 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 6235 if (entry->address_type != peer_identity_addr_type) continue; 6236 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 6237 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 6238 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 6239 } 6240 #endif 6241 6242 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 6243 peer_identity_addreses); 6244 return true; 6245 } 6246 6247 // then add new entries 6248 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6249 uint8_t offset = i >> 3; 6250 uint8_t mask = 1 << (i & 7); 6251 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 6252 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 6253 bd_addr_t peer_identity_addreses; 6254 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6255 sm_key_t peer_irk; 6256 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6257 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6258 if (btstack_is_null(peer_irk, 16)) continue; 6259 const uint8_t *local_irk = gap_get_persistent_irk(); 6260 // command uses format specifier 'P' that stores 16-byte value without flip 6261 uint8_t local_irk_flipped[16]; 6262 uint8_t peer_irk_flipped[16]; 6263 reverse_128(local_irk, local_irk_flipped); 6264 reverse_128(peer_irk, peer_irk_flipped); 6265 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 6266 peer_irk_flipped, local_irk_flipped); 6267 return true; 6268 } 6269 6270 // finally, set privacy mode 6271 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6272 uint8_t offset = i >> 3; 6273 uint8_t mask = 1 << (i & 7); 6274 if ((hci_stack->le_resolving_list_set_privacy_mode[offset] & mask) == 0) continue; 6275 hci_stack->le_resolving_list_set_privacy_mode[offset] &= ~mask; 6276 if (hci_stack->le_privacy_mode == LE_PRIVACY_MODE_NETWORK) { 6277 // Network Privacy Mode is default 6278 continue; 6279 } 6280 bd_addr_t peer_identity_address; 6281 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6282 sm_key_t peer_irk; 6283 le_device_db_info(i, &peer_identity_addr_type, peer_identity_address, peer_irk); 6284 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6285 if (btstack_is_null(peer_irk, 16)) continue; 6286 // command uses format specifier 'P' that stores 16-byte value without flip 6287 uint8_t peer_irk_flipped[16]; 6288 reverse_128(peer_irk, peer_irk_flipped); 6289 hci_send_cmd(&hci_le_set_privacy_mode, peer_identity_addr_type, peer_identity_address, hci_stack->le_privacy_mode); 6290 return true; 6291 } 6292 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6293 break; 6294 6295 default: 6296 break; 6297 } 6298 } 6299 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6300 #endif 6301 6302 #ifdef ENABLE_LE_CENTRAL 6303 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6304 // LE Whitelist Management 6305 if (periodic_list_modification_pending){ 6306 // add/remove entries 6307 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 6308 while (btstack_linked_list_iterator_has_next(&lit)){ 6309 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 6310 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 6311 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 6312 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 6313 return true; 6314 } 6315 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 6316 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 6317 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 6318 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address, entry->sid); 6319 return true; 6320 } 6321 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 6322 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 6323 btstack_memory_periodic_advertiser_list_entry_free(entry); 6324 } 6325 } 6326 } 6327 #endif 6328 #endif 6329 6330 #ifdef ENABLE_LE_CENTRAL 6331 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6332 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6333 if (hci_stack->le_past_set_default_params){ 6334 hci_stack->le_past_set_default_params = false; 6335 hci_send_cmd(&hci_le_set_default_periodic_advertising_sync_transfer_parameters, 6336 hci_stack->le_past_mode, 6337 hci_stack->le_past_skip, 6338 hci_stack->le_past_sync_timeout, 6339 hci_stack->le_past_cte_type); 6340 return true; 6341 } 6342 #endif 6343 #endif 6344 #endif 6345 6346 // post-pone all actions until stack is fully working 6347 if (hci_stack->state != HCI_STATE_WORKING) return false; 6348 6349 // advertisements, active scanning, and creating connections requires random address to be set if using private address 6350 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 6351 6352 // Phase 4: restore state 6353 6354 #ifdef ENABLE_LE_CENTRAL 6355 // re-start scanning 6356 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 6357 hci_stack->le_scanning_active = true; 6358 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6359 if (hci_extended_advertising_supported()){ 6360 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, hci_stack->le_scan_filter_duplicates, 0, 0); 6361 } else 6362 #endif 6363 { 6364 hci_send_cmd(&hci_le_set_scan_enable, 1, hci_stack->le_scan_filter_duplicates); 6365 } 6366 return true; 6367 } 6368 #endif 6369 6370 #ifdef ENABLE_LE_CENTRAL 6371 // re-start connecting 6372 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 6373 bd_addr_t null_addr; 6374 memset(null_addr, 0, 6); 6375 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6376 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6377 hci_send_le_create_connection(1, 0, null_addr); 6378 return true; 6379 } 6380 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6381 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 6382 switch(hci_stack->le_periodic_sync_request){ 6383 case LE_CONNECTING_DIRECT: 6384 case LE_CONNECTING_WHITELIST: 6385 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 6386 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 6387 hci_stack->le_periodic_sync_options, 6388 hci_stack->le_periodic_sync_advertising_sid, 6389 hci_stack->le_periodic_sync_advertiser_address_type, 6390 hci_stack->le_periodic_sync_advertiser_address, 6391 hci_stack->le_periodic_sync_skip, 6392 hci_stack->le_periodic_sync_timeout, 6393 hci_stack->le_periodic_sync_cte_type); 6394 return true; 6395 default: 6396 break; 6397 } 6398 } 6399 #endif 6400 #endif 6401 6402 #ifdef ENABLE_LE_PERIPHERAL 6403 // re-start advertising 6404 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6405 // check if advertisements should be enabled given 6406 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6407 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 6408 6409 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6410 if (hci_extended_advertising_supported()){ 6411 const uint8_t advertising_handles[] = { 0 }; 6412 const uint16_t durations[] = { 0 }; 6413 const uint16_t max_events[] = { 0 }; 6414 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6415 } else 6416 #endif 6417 { 6418 hci_send_cmd(&hci_le_set_advertise_enable, 1); 6419 } 6420 return true; 6421 } 6422 6423 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6424 if (hci_extended_advertising_supported()) { 6425 btstack_linked_list_iterator_t it; 6426 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6427 while (btstack_linked_list_iterator_has_next(&it)) { 6428 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6429 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6430 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6431 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 6432 const uint16_t durations[] = { advertising_set->enable_timeout }; 6433 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 6434 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6435 return true; 6436 } 6437 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6438 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 6439 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 6440 uint8_t enable = 1; 6441 if (advertising_set->periodic_include_adi){ 6442 enable |= 2; 6443 } 6444 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 6445 return true; 6446 } 6447 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6448 } 6449 } 6450 #endif 6451 #endif 6452 6453 return false; 6454 } 6455 6456 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6457 static bool hci_run_iso_tasks(void){ 6458 btstack_linked_list_iterator_t it; 6459 6460 if (hci_stack->iso_active_operation_type != HCI_ISO_TYPE_INVALID) { 6461 return false; 6462 } 6463 6464 // BIG 6465 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 6466 while (btstack_linked_list_iterator_has_next(&it)){ 6467 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 6468 switch (big->state){ 6469 case LE_AUDIO_BIG_STATE_CREATE: 6470 hci_stack->iso_active_operation_group_id = big->params->big_handle; 6471 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6472 big->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6473 hci_send_cmd(&hci_le_create_big, 6474 big->params->big_handle, 6475 big->params->advertising_handle, 6476 big->params->num_bis, 6477 big->params->sdu_interval_us, 6478 big->params->max_sdu, 6479 big->params->max_transport_latency_ms, 6480 big->params->rtn, 6481 big->params->phy, 6482 big->params->packing, 6483 big->params->framing, 6484 big->params->encryption, 6485 big->params->broadcast_code); 6486 return true; 6487 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6488 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6489 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); 6490 return true; 6491 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6492 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6493 hci_send_cmd(&hci_le_terminate_big, big->big_handle, big->state_vars.status); 6494 return true; 6495 case LE_AUDIO_BIG_STATE_TERMINATE: 6496 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6497 hci_send_cmd(&hci_le_terminate_big, big->big_handle, ERROR_CODE_SUCCESS); 6498 return true; 6499 default: 6500 break; 6501 } 6502 } 6503 6504 // BIG Sync 6505 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 6506 while (btstack_linked_list_iterator_has_next(&it)){ 6507 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 6508 switch (big_sync->state){ 6509 case LE_AUDIO_BIG_STATE_CREATE: 6510 hci_stack->iso_active_operation_group_id = big_sync->params->big_handle; 6511 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6512 big_sync->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6513 hci_send_cmd(&hci_le_big_create_sync, 6514 big_sync->params->big_handle, 6515 big_sync->params->sync_handle, 6516 big_sync->params->encryption, 6517 big_sync->params->broadcast_code, 6518 big_sync->params->mse, 6519 big_sync->params->big_sync_timeout_10ms, 6520 big_sync->params->num_bis, 6521 big_sync->params->bis_indices); 6522 return true; 6523 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6524 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6525 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); 6526 return true; 6527 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6528 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6529 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6530 return true; 6531 case LE_AUDIO_BIG_STATE_TERMINATE: 6532 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6533 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6534 return true; 6535 default: 6536 break; 6537 } 6538 } 6539 6540 // CIG 6541 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_cigs); 6542 while (btstack_linked_list_iterator_has_next(&it)) { 6543 le_audio_cig_t *cig = (le_audio_cig_t *) btstack_linked_list_iterator_next(&it); 6544 uint8_t i; 6545 // Set CIG Parameters 6546 uint8_t cis_id[MAX_NR_CIS]; 6547 uint16_t max_sdu_c_to_p[MAX_NR_CIS]; 6548 uint16_t max_sdu_p_to_c[MAX_NR_CIS]; 6549 uint8_t phy_c_to_p[MAX_NR_CIS]; 6550 uint8_t phy_p_to_c[MAX_NR_CIS]; 6551 uint8_t rtn_c_to_p[MAX_NR_CIS]; 6552 uint8_t rtn_p_to_c[MAX_NR_CIS]; 6553 switch (cig->state) { 6554 case LE_AUDIO_CIG_STATE_CREATE: 6555 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6556 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6557 cig->state = LE_AUDIO_CIG_STATE_W4_ESTABLISHED; 6558 le_audio_cig_params_t * params = cig->params; 6559 for (i = 0; i < params->num_cis; i++) { 6560 le_audio_cis_params_t * cis_params = &cig->params->cis_params[i]; 6561 cis_id[i] = cis_params->cis_id; 6562 max_sdu_c_to_p[i] = cis_params->max_sdu_c_to_p; 6563 max_sdu_p_to_c[i] = cis_params->max_sdu_p_to_c; 6564 phy_c_to_p[i] = cis_params->phy_c_to_p; 6565 phy_p_to_c[i] = cis_params->phy_p_to_c; 6566 rtn_c_to_p[i] = cis_params->rtn_c_to_p; 6567 rtn_p_to_c[i] = cis_params->rtn_p_to_c; 6568 } 6569 hci_send_cmd(&hci_le_set_cig_parameters, 6570 cig->cig_id, 6571 params->sdu_interval_c_to_p, 6572 params->sdu_interval_p_to_c, 6573 params->worst_case_sca, 6574 params->packing, 6575 params->framing, 6576 params->max_transport_latency_c_to_p, 6577 params->max_transport_latency_p_to_c, 6578 params->num_cis, 6579 cis_id, 6580 max_sdu_c_to_p, 6581 max_sdu_p_to_c, 6582 phy_c_to_p, 6583 phy_p_to_c, 6584 rtn_c_to_p, 6585 rtn_p_to_c 6586 ); 6587 return true; 6588 case LE_AUDIO_CIG_STATE_CREATE_CIS: 6589 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6590 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6591 cig->state = LE_AUDIO_CIG_STATE_W4_CREATE_CIS; 6592 for (i=0;i<cig->num_cis;i++){ 6593 cig->cis_setup_active[i] = true; 6594 } 6595 hci_send_cmd(&hci_le_create_cis, cig->num_cis, cig->cis_con_handles, cig->acl_con_handles); 6596 return true; 6597 case LE_AUDIO_CIG_STATE_SETUP_ISO_PATH: 6598 while (cig->state_vars.next_cis < (cig->num_cis * 2)){ 6599 // find next path to setup 6600 uint8_t cis_index = cig->state_vars.next_cis >> 1; 6601 if (cig->cis_established[cis_index] == false) { 6602 continue; 6603 } 6604 uint8_t cis_direction = cig->state_vars.next_cis & 1; 6605 bool setup = true; 6606 if (cis_direction == 0){ 6607 // 0 - input - host to controller 6608 // we are central => central to peripheral 6609 setup &= cig->params->cis_params[cis_index].max_sdu_c_to_p > 0; 6610 } else { 6611 // 1 - output - controller to host 6612 // we are central => peripheral to central 6613 setup &= cig->params->cis_params[cis_index].max_sdu_p_to_c > 0; 6614 } 6615 if (setup){ 6616 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6617 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6618 cig->state = LE_AUDIO_CIG_STATE_W4_SETUP_ISO_PATH; 6619 hci_send_cmd(&hci_le_setup_iso_data_path, cig->cis_con_handles[cis_index], cis_direction, 0, 0, 0, 0, 0, 0, NULL); 6620 return true; 6621 } 6622 cig->state_vars.next_cis++; 6623 } 6624 // emit done 6625 cig->state = LE_AUDIO_CIG_STATE_ACTIVE; 6626 default: 6627 break; 6628 } 6629 } 6630 6631 // CIS Accept/Reject 6632 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 6633 while (btstack_linked_list_iterator_has_next(&it)) { 6634 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 6635 hci_con_handle_t con_handle; 6636 switch (iso_stream->state){ 6637 case HCI_ISO_STREAM_W2_ACCEPT: 6638 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 6639 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6640 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6641 hci_send_cmd(&hci_le_accept_cis_request, iso_stream->con_handle); 6642 return true; 6643 case HCI_ISO_STREAM_W2_REJECT: 6644 con_handle = iso_stream->con_handle; 6645 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6646 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6647 hci_iso_stream_finalize(iso_stream); 6648 hci_send_cmd(&hci_le_reject_cis_request, con_handle, ERROR_CODE_REMOTE_DEVICE_TERMINATED_CONNECTION_DUE_TO_LOW_RESOURCES); 6649 return true; 6650 case HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT: 6651 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6652 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6653 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ISO_SETUP_INPUT; 6654 hci_send_cmd(&hci_le_setup_iso_data_path, iso_stream->con_handle, 0, 0, 0, 0, 0, 0, 0, NULL); 6655 break; 6656 case HCI_ISO_STREAM_STATE_W2_SETUP_ISO_OUTPUT: 6657 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6658 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6659 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ISO_SETUP_OUTPUT; 6660 hci_send_cmd(&hci_le_setup_iso_data_path, iso_stream->con_handle, 1, 0, 0, 0, 0, 0, 0, NULL); 6661 break; 6662 default: 6663 break; 6664 } 6665 } 6666 6667 return false; 6668 } 6669 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6670 #endif 6671 6672 static bool hci_run_general_pending_commands(void){ 6673 btstack_linked_item_t * it; 6674 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6675 hci_connection_t * connection = (hci_connection_t *) it; 6676 6677 switch(connection->state){ 6678 case SEND_CREATE_CONNECTION: 6679 switch(connection->address_type){ 6680 #ifdef ENABLE_CLASSIC 6681 case BD_ADDR_TYPE_ACL: 6682 log_info("sending hci_create_connection"); 6683 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 6684 break; 6685 #endif 6686 default: 6687 #ifdef ENABLE_BLE 6688 #ifdef ENABLE_LE_CENTRAL 6689 log_info("sending hci_le_create_connection"); 6690 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6691 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6692 hci_send_le_create_connection(0, connection->address_type, connection->address); 6693 connection->state = SENT_CREATE_CONNECTION; 6694 #endif 6695 #endif 6696 break; 6697 } 6698 return true; 6699 6700 #ifdef ENABLE_CLASSIC 6701 case RECEIVED_CONNECTION_REQUEST: 6702 connection->role = HCI_ROLE_SLAVE; 6703 if (connection->address_type == BD_ADDR_TYPE_ACL){ 6704 log_info("sending hci_accept_connection_request"); 6705 connection->state = ACCEPTED_CONNECTION_REQUEST; 6706 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 6707 return true; 6708 } 6709 break; 6710 #endif 6711 case SEND_DISCONNECT: 6712 connection->state = SENT_DISCONNECT; 6713 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6714 return true; 6715 6716 default: 6717 break; 6718 } 6719 6720 // no further commands if connection is about to get shut down 6721 if (connection->state == SENT_DISCONNECT) continue; 6722 6723 #ifdef ENABLE_CLASSIC 6724 6725 // Handling link key request requires remote supported features 6726 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 6727 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 6728 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6729 6730 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 6731 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 6732 if (have_link_key && security_level_sufficient){ 6733 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 6734 } else { 6735 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 6736 } 6737 return true; 6738 } 6739 6740 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 6741 log_info("denying to pin request"); 6742 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 6743 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 6744 return true; 6745 } 6746 6747 // security assessment requires remote features 6748 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 6749 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 6750 hci_ssp_assess_security_on_io_cap_request(connection); 6751 // 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 6752 } 6753 6754 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 6755 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6756 // set authentication requirements: 6757 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 6758 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 6759 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 6760 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 6761 authreq |= 1; 6762 } 6763 bool bonding = hci_stack->bondable; 6764 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 6765 // if we have received IO Cap Response, we're in responder role 6766 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6767 if (bonding && !remote_bonding){ 6768 log_info("Remote not bonding, dropping local flag"); 6769 bonding = false; 6770 } 6771 } 6772 if (bonding){ 6773 if (connection->bonding_flags & BONDING_DEDICATED){ 6774 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6775 } else { 6776 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 6777 } 6778 } 6779 uint8_t have_oob_data = 0; 6780 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6781 if (connection->classic_oob_c_192 != NULL){ 6782 have_oob_data |= 1; 6783 } 6784 if (connection->classic_oob_c_256 != NULL){ 6785 have_oob_data |= 2; 6786 } 6787 #endif 6788 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 6789 return true; 6790 } 6791 6792 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 6793 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6794 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 6795 return true; 6796 } 6797 6798 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6799 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6800 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6801 const uint8_t zero[16] = { 0 }; 6802 const uint8_t * r_192 = zero; 6803 const uint8_t * c_192 = zero; 6804 const uint8_t * r_256 = zero; 6805 const uint8_t * c_256 = zero; 6806 // verify P-256 OOB 6807 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6808 c_256 = connection->classic_oob_c_256; 6809 if (connection->classic_oob_r_256 != NULL) { 6810 r_256 = connection->classic_oob_r_256; 6811 } 6812 } 6813 // verify P-192 OOB 6814 if ((connection->classic_oob_c_192 != NULL)) { 6815 c_192 = connection->classic_oob_c_192; 6816 if (connection->classic_oob_r_192 != NULL) { 6817 r_192 = connection->classic_oob_r_192; 6818 } 6819 } 6820 6821 // assess security 6822 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6823 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6824 if (need_level_4 && !can_reach_level_4){ 6825 log_info("Level 4 required, but not possible -> abort"); 6826 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6827 // send oob negative reply 6828 c_256 = NULL; 6829 c_192 = NULL; 6830 } 6831 6832 // Reply 6833 if (c_256 != zero) { 6834 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6835 } else if (c_192 != zero){ 6836 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6837 } else { 6838 hci_stack->classic_oob_con_handle = connection->con_handle; 6839 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6840 } 6841 return true; 6842 } 6843 #endif 6844 6845 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6846 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6847 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6848 return true; 6849 } 6850 6851 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6852 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6853 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6854 return true; 6855 } 6856 6857 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6858 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6859 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6860 return true; 6861 } 6862 6863 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6864 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6865 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6866 connection->state = SENT_DISCONNECT; 6867 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6868 return true; 6869 } 6870 6871 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6872 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6873 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6874 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6875 return true; 6876 } 6877 6878 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6879 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6880 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6881 return true; 6882 } 6883 6884 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6885 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6886 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6887 return true; 6888 } 6889 6890 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6891 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6892 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6893 return true; 6894 } 6895 6896 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6897 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6898 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6899 return true; 6900 } 6901 6902 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6903 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6904 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6905 return true; 6906 } 6907 #endif 6908 6909 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6910 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6911 #ifdef ENABLE_CLASSIC 6912 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6913 #endif 6914 if (connection->state != SENT_DISCONNECT){ 6915 connection->state = SENT_DISCONNECT; 6916 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6917 return true; 6918 } 6919 } 6920 6921 #ifdef ENABLE_CLASSIC 6922 uint16_t sniff_min_interval; 6923 switch (connection->sniff_min_interval){ 6924 case 0: 6925 break; 6926 case 0xffff: 6927 connection->sniff_min_interval = 0; 6928 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6929 return true; 6930 default: 6931 sniff_min_interval = connection->sniff_min_interval; 6932 connection->sniff_min_interval = 0; 6933 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6934 return true; 6935 } 6936 6937 if (connection->sniff_subrating_max_latency != 0xffff){ 6938 uint16_t max_latency = connection->sniff_subrating_max_latency; 6939 connection->sniff_subrating_max_latency = 0; 6940 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6941 return true; 6942 } 6943 6944 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6945 uint8_t service_type = (uint8_t) connection->qos_service_type; 6946 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6947 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); 6948 return true; 6949 } 6950 6951 if (connection->request_role != HCI_ROLE_INVALID){ 6952 hci_role_t role = connection->request_role; 6953 connection->request_role = HCI_ROLE_INVALID; 6954 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6955 return true; 6956 } 6957 #endif 6958 6959 if (connection->gap_connection_tasks != 0){ 6960 #ifdef ENABLE_CLASSIC 6961 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6962 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6963 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6964 return true; 6965 } 6966 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6967 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6968 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6969 return true; 6970 } 6971 #endif 6972 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6973 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6974 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6975 return true; 6976 } 6977 #ifdef ENABLE_BLE 6978 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_LE_READ_REMOTE_FEATURES){ 6979 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_LE_READ_REMOTE_FEATURES; 6980 hci_send_cmd(&hci_le_read_remote_used_features, connection->con_handle); 6981 return true; 6982 } 6983 #endif 6984 } 6985 6986 #ifdef ENABLE_BLE 6987 switch (connection->le_con_parameter_update_state){ 6988 // response to L2CAP CON PARAMETER UPDATE REQUEST 6989 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6990 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6991 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6992 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6993 0x0000, 0xffff); 6994 return true; 6995 case CON_PARAMETER_UPDATE_REPLY: 6996 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6997 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6998 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6999 0x0000, 0xffff); 7000 return true; 7001 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 7002 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 7003 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 7004 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 7005 return true; 7006 default: 7007 break; 7008 } 7009 if (connection->le_phy_update_all_phys != 0xffu){ 7010 uint8_t all_phys = connection->le_phy_update_all_phys; 7011 connection->le_phy_update_all_phys = 0xff; 7012 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); 7013 return true; 7014 } 7015 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7016 if (connection->le_past_sync_handle != HCI_CON_HANDLE_INVALID){ 7017 hci_con_handle_t sync_handle = connection->le_past_sync_handle; 7018 connection->le_past_sync_handle = HCI_CON_HANDLE_INVALID; 7019 hci_send_cmd(&hci_le_periodic_advertising_sync_transfer, connection->con_handle, connection->le_past_service_data, sync_handle); 7020 return true; 7021 } 7022 #endif 7023 #endif 7024 } 7025 return false; 7026 } 7027 7028 static void hci_run(void){ 7029 7030 // stack state sub statemachines 7031 switch (hci_stack->state) { 7032 case HCI_STATE_INITIALIZING: 7033 hci_initializing_run(); 7034 break; 7035 case HCI_STATE_HALTING: 7036 hci_halting_run(); 7037 break; 7038 case HCI_STATE_FALLING_ASLEEP: 7039 hci_falling_asleep_run(); 7040 break; 7041 default: 7042 break; 7043 } 7044 7045 // allow to run after initialization to working transition 7046 if (hci_stack->state != HCI_STATE_WORKING){ 7047 return; 7048 } 7049 7050 bool done; 7051 7052 // send continuation fragments first, as they block the prepared packet buffer 7053 done = hci_run_acl_fragments(); 7054 if (done) return; 7055 7056 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7057 done = hci_run_iso_fragments(); 7058 if (done) return; 7059 #endif 7060 7061 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 7062 // send host num completed packets next as they don't require num_cmd_packets > 0 7063 if (!hci_can_send_comand_packet_transport()) return; 7064 if (hci_stack->host_completed_packets){ 7065 hci_host_num_completed_packets(); 7066 return; 7067 } 7068 #endif 7069 7070 if (!hci_can_send_command_packet_now()) return; 7071 7072 // global/non-connection oriented commands 7073 7074 7075 #ifdef ENABLE_CLASSIC 7076 // general gap classic 7077 done = hci_run_general_gap_classic(); 7078 if (done) return; 7079 #endif 7080 7081 #ifdef ENABLE_BLE 7082 // general gap le 7083 done = hci_run_general_gap_le(); 7084 if (done) return; 7085 7086 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7087 // ISO related tasks, e.g. BIG create/terminate/sync 7088 done = hci_run_iso_tasks(); 7089 if (done) return; 7090 #endif 7091 #endif 7092 7093 // send pending HCI commands 7094 hci_run_general_pending_commands(); 7095 } 7096 7097 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 7098 // house-keeping 7099 7100 #ifdef ENABLE_CLASSIC 7101 bd_addr_t addr; 7102 hci_connection_t * conn; 7103 #endif 7104 #ifdef ENABLE_LE_CENTRAL 7105 uint8_t initiator_filter_policy; 7106 #endif 7107 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7108 uint8_t i; 7109 uint8_t num_cis; 7110 hci_con_handle_t cis_handle; 7111 uint8_t status; 7112 #endif 7113 7114 uint16_t opcode = little_endian_read_16(packet, 0); 7115 switch (opcode) { 7116 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 7117 hci_stack->loopback_mode = packet[3]; 7118 break; 7119 7120 #ifdef ENABLE_CLASSIC 7121 case HCI_OPCODE_HCI_CREATE_CONNECTION: 7122 reverse_bd_addr(&packet[3], addr); 7123 log_info("Create_connection to %s", bd_addr_to_str(addr)); 7124 7125 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 7126 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 7127 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 7128 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 7129 } 7130 7131 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7132 if (!conn) { 7133 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7134 if (!conn) { 7135 // notify client that alloc failed 7136 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7137 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 7138 } 7139 conn->state = SEND_CREATE_CONNECTION; 7140 conn->role = HCI_ROLE_MASTER; 7141 } 7142 7143 log_info("conn state %u", conn->state); 7144 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 7145 switch (conn->state) { 7146 // if connection active exists 7147 case OPEN: 7148 // and OPEN, emit connection complete command 7149 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 7150 // packet not sent to controller 7151 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7152 case RECEIVED_DISCONNECTION_COMPLETE: 7153 // create connection triggered in disconnect complete event, let's do it now 7154 break; 7155 case SEND_CREATE_CONNECTION: 7156 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 7157 if (hci_classic_operation_active()){ 7158 return ERROR_CODE_SUCCESS; 7159 } 7160 #endif 7161 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 7162 break; 7163 default: 7164 // otherwise, just ignore as it is already in the open process 7165 // packet not sent to controller 7166 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7167 } 7168 conn->state = SENT_CREATE_CONNECTION; 7169 7170 // track outgoing connection 7171 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 7172 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 7173 break; 7174 7175 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 7176 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 7177 // setup_synchronous_connection? Voice setting at offset 22 7178 // TODO: compare to current setting if sco connection already active 7179 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 7180 break; 7181 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 7182 // accept_synchronous_connection? Voice setting at offset 18 7183 // TODO: compare to current setting if sco connection already active 7184 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 7185 // track outgoing connection 7186 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 7187 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 7188 break; 7189 #endif 7190 #endif 7191 7192 #ifdef ENABLE_BLE 7193 #ifdef ENABLE_LE_CENTRAL 7194 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 7195 // white list used? 7196 initiator_filter_policy = packet[7]; 7197 switch (initiator_filter_policy) { 7198 case 0: 7199 // whitelist not used 7200 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 7201 break; 7202 case 1: 7203 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 7204 break; 7205 default: 7206 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 7207 break; 7208 } 7209 // track outgoing connection 7210 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer address type 7211 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 7212 break; 7213 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7214 case HCI_OPCODE_HCI_LE_EXTENDED_CREATE_CONNECTION: 7215 // white list used? 7216 initiator_filter_policy = packet[3]; 7217 switch (initiator_filter_policy) { 7218 case 0: 7219 // whitelist not used 7220 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 7221 break; 7222 case 1: 7223 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 7224 break; 7225 default: 7226 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 7227 break; 7228 } 7229 // track outgoing connection 7230 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[5]; // peer address type 7231 reverse_bd_addr( &packet[6], hci_stack->outgoing_addr); // peer address 7232 break; 7233 #endif 7234 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 7235 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 7236 break; 7237 #endif 7238 #endif /* ENABLE_BLE */ 7239 default: 7240 break; 7241 } 7242 7243 hci_stack->num_cmd_packets--; 7244 7245 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 7246 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 7247 if (err != 0){ 7248 return ERROR_CODE_HARDWARE_FAILURE; 7249 } 7250 return ERROR_CODE_SUCCESS; 7251 } 7252 7253 // disconnect because of security block 7254 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 7255 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7256 if (!connection) return; 7257 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 7258 } 7259 7260 7261 // Configure Secure Simple Pairing 7262 7263 #ifdef ENABLE_CLASSIC 7264 7265 // enable will enable SSP during init 7266 void gap_ssp_set_enable(int enable){ 7267 hci_stack->ssp_enable = enable; 7268 } 7269 7270 static int hci_local_ssp_activated(void){ 7271 return gap_ssp_supported() && hci_stack->ssp_enable; 7272 } 7273 7274 // if set, BTstack will respond to io capability request using authentication requirement 7275 void gap_ssp_set_io_capability(int io_capability){ 7276 hci_stack->ssp_io_capability = io_capability; 7277 } 7278 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 7279 hci_stack->ssp_authentication_requirement = authentication_requirement; 7280 } 7281 7282 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 7283 void gap_ssp_set_auto_accept(int auto_accept){ 7284 hci_stack->ssp_auto_accept = auto_accept; 7285 } 7286 7287 void gap_secure_connections_enable(bool enable){ 7288 hci_stack->secure_connections_enable = enable; 7289 } 7290 bool gap_secure_connections_active(void){ 7291 return hci_stack->secure_connections_active; 7292 } 7293 7294 #endif 7295 7296 // va_list part of hci_send_cmd 7297 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 7298 if (!hci_can_send_command_packet_now()){ 7299 log_error("hci_send_cmd called but cannot send packet now"); 7300 return ERROR_CODE_COMMAND_DISALLOWED; 7301 } 7302 7303 // for HCI INITIALIZATION 7304 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 7305 hci_stack->last_cmd_opcode = cmd->opcode; 7306 7307 hci_reserve_packet_buffer(); 7308 uint8_t * packet = hci_stack->hci_packet_buffer; 7309 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 7310 uint8_t status = hci_send_cmd_packet(packet, size); 7311 7312 // release packet buffer on error or for synchronous transport implementations 7313 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 7314 hci_release_packet_buffer(); 7315 hci_emit_transport_packet_sent(); 7316 } 7317 7318 return status; 7319 } 7320 7321 /** 7322 * pre: numcmds >= 0 - it's allowed to send a command to the controller 7323 */ 7324 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 7325 va_list argptr; 7326 va_start(argptr, cmd); 7327 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 7328 va_end(argptr); 7329 return status; 7330 } 7331 7332 // Create various non-HCI events. 7333 // TODO: generalize, use table similar to hci_create_command 7334 7335 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 7336 // dump packet 7337 if (dump) { 7338 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 7339 } 7340 7341 // dispatch to all event handlers 7342 btstack_linked_list_iterator_t it; 7343 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 7344 while (btstack_linked_list_iterator_has_next(&it)){ 7345 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 7346 entry->callback(HCI_EVENT_PACKET, 0, event, size); 7347 } 7348 } 7349 7350 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 7351 if (!hci_stack->acl_packet_handler) return; 7352 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 7353 } 7354 7355 #ifdef ENABLE_CLASSIC 7356 static void hci_notify_if_sco_can_send_now(void){ 7357 // notify SCO sender if waiting 7358 if (!hci_stack->sco_waiting_for_can_send_now) return; 7359 if (hci_can_send_sco_packet_now()){ 7360 hci_stack->sco_waiting_for_can_send_now = 0; 7361 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 7362 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 7363 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 7364 } 7365 } 7366 7367 // parsing end emitting has been merged to reduce code size 7368 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 7369 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 7370 7371 uint8_t * eir_data; 7372 ad_context_t context; 7373 const uint8_t * name; 7374 uint8_t name_len; 7375 7376 if (size < 3) return; 7377 7378 int event_type = hci_event_packet_get_type(packet); 7379 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 7380 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 7381 7382 switch (event_type){ 7383 case HCI_EVENT_INQUIRY_RESULT: 7384 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7385 if (size != (3 + (num_responses * 14))) return; 7386 break; 7387 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7388 if (size != 257) return; 7389 if (num_responses != 1) return; 7390 break; 7391 default: 7392 return; 7393 } 7394 7395 // event[1] is set at the end 7396 int i; 7397 for (i=0; i<num_responses;i++){ 7398 memset(event, 0, sizeof(event)); 7399 event[0] = GAP_EVENT_INQUIRY_RESULT; 7400 uint8_t event_size = 27; // if name is not set by EIR 7401 7402 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 7403 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 7404 (void)memcpy(&event[9], 7405 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 7406 3); // class of device 7407 (void)memcpy(&event[12], 7408 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 7409 2); // clock offset 7410 7411 switch (event_type){ 7412 case HCI_EVENT_INQUIRY_RESULT: 7413 // 14,15,16,17 = 0, size 18 7414 break; 7415 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7416 event[14] = 1; 7417 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7418 // 16,17 = 0, size 18 7419 break; 7420 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7421 event[14] = 1; 7422 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7423 // EIR packets only contain a single inquiry response 7424 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 7425 name = NULL; 7426 // Iterate over EIR data 7427 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 7428 uint8_t data_type = ad_iterator_get_data_type(&context); 7429 uint8_t data_size = ad_iterator_get_data_len(&context); 7430 const uint8_t * data = ad_iterator_get_data(&context); 7431 // Prefer Complete Local Name over Shortened Local Name 7432 switch (data_type){ 7433 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 7434 if (name) continue; 7435 /* fall through */ 7436 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 7437 name = data; 7438 name_len = data_size; 7439 break; 7440 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 7441 if (data_size != 8) break; 7442 event[16] = 1; 7443 memcpy(&event[17], data, 8); 7444 break; 7445 default: 7446 break; 7447 } 7448 } 7449 if (name){ 7450 event[25] = 1; 7451 // truncate name if needed 7452 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 7453 event[26] = len; 7454 (void)memcpy(&event[27], name, len); 7455 event_size += len; 7456 } 7457 break; 7458 default: 7459 return; 7460 } 7461 event[1] = event_size - 2; 7462 hci_emit_event(event, event_size, 1); 7463 } 7464 } 7465 #endif 7466 7467 void hci_emit_state(void){ 7468 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 7469 uint8_t event[3]; 7470 event[0] = BTSTACK_EVENT_STATE; 7471 event[1] = sizeof(event) - 2u; 7472 event[2] = hci_stack->state; 7473 hci_emit_event(event, sizeof(event), 1); 7474 } 7475 7476 #ifdef ENABLE_CLASSIC 7477 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 7478 uint8_t event[13]; 7479 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 7480 event[1] = sizeof(event) - 2; 7481 event[2] = status; 7482 little_endian_store_16(event, 3, con_handle); 7483 reverse_bd_addr(address, &event[5]); 7484 event[11] = 1; // ACL connection 7485 event[12] = 0; // encryption disabled 7486 hci_emit_event(event, sizeof(event), 1); 7487 } 7488 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 7489 if (disable_l2cap_timeouts) return; 7490 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 7491 uint8_t event[4]; 7492 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 7493 event[1] = sizeof(event) - 2; 7494 little_endian_store_16(event, 2, conn->con_handle); 7495 hci_emit_event(event, sizeof(event), 1); 7496 } 7497 #endif 7498 7499 #ifdef ENABLE_BLE 7500 #ifdef ENABLE_LE_CENTRAL 7501 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){ 7502 uint8_t event[21]; 7503 event[0] = HCI_EVENT_LE_META; 7504 event[1] = sizeof(event) - 2u; 7505 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 7506 event[3] = status; 7507 little_endian_store_16(event, 4, con_handle); 7508 event[6] = 0; // TODO: role 7509 event[7] = address_type; 7510 reverse_bd_addr(address, &event[8]); 7511 little_endian_store_16(event, 14, 0); // interval 7512 little_endian_store_16(event, 16, 0); // latency 7513 little_endian_store_16(event, 18, 0); // supervision timeout 7514 event[20] = 0; // master clock accuracy 7515 hci_emit_event(event, sizeof(event), 1); 7516 } 7517 #endif 7518 #endif 7519 7520 static void hci_emit_transport_packet_sent(void){ 7521 // notify upper stack that it might be possible to send again 7522 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 7523 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 7524 } 7525 7526 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 7527 uint8_t event[6]; 7528 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 7529 event[1] = sizeof(event) - 2u; 7530 event[2] = 0; // status = OK 7531 little_endian_store_16(event, 3, con_handle); 7532 event[5] = reason; 7533 hci_emit_event(event, sizeof(event), 1); 7534 } 7535 7536 static void hci_emit_nr_connections_changed(void){ 7537 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 7538 uint8_t event[3]; 7539 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 7540 event[1] = sizeof(event) - 2u; 7541 event[2] = nr_hci_connections(); 7542 hci_emit_event(event, sizeof(event), 1); 7543 } 7544 7545 static void hci_emit_hci_open_failed(void){ 7546 log_info("BTSTACK_EVENT_POWERON_FAILED"); 7547 uint8_t event[2]; 7548 event[0] = BTSTACK_EVENT_POWERON_FAILED; 7549 event[1] = sizeof(event) - 2u; 7550 hci_emit_event(event, sizeof(event), 1); 7551 } 7552 7553 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 7554 log_info("hci_emit_dedicated_bonding_result %u ", status); 7555 uint8_t event[9]; 7556 int pos = 0; 7557 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 7558 event[pos++] = sizeof(event) - 2u; 7559 event[pos++] = status; 7560 reverse_bd_addr(address, &event[pos]); 7561 hci_emit_event(event, sizeof(event), 1); 7562 } 7563 7564 7565 #ifdef ENABLE_CLASSIC 7566 7567 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 7568 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 7569 uint8_t event[5]; 7570 int pos = 0; 7571 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 7572 event[pos++] = sizeof(event) - 2; 7573 little_endian_store_16(event, 2, con_handle); 7574 pos += 2; 7575 event[pos++] = level; 7576 hci_emit_event(event, sizeof(event), 1); 7577 } 7578 7579 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 7580 if (!connection) return LEVEL_0; 7581 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 7582 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 7583 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 7584 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 7585 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 7586 // LEVEL 4 always requires 128 bit encrytion key size 7587 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 7588 security_level = LEVEL_3; 7589 } 7590 return security_level; 7591 } 7592 7593 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable){ 7594 uint8_t event[4]; 7595 event[0] = BTSTACK_EVENT_SCAN_MODE_CHANGED; 7596 event[1] = sizeof(event) - 2; 7597 event[2] = discoverable; 7598 event[3] = connectable; 7599 hci_emit_event(event, sizeof(event), 1); 7600 } 7601 7602 // query if remote side supports eSCO 7603 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 7604 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7605 if (!connection) return false; 7606 return (connection->remote_supported_features[0] & 1) != 0; 7607 } 7608 7609 static bool hci_ssp_supported(hci_connection_t * connection){ 7610 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 7611 return (connection->bonding_flags & mask) == mask; 7612 } 7613 7614 // query if remote side supports SSP 7615 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 7616 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7617 if (!connection) return false; 7618 return hci_ssp_supported(connection) ? 1 : 0; 7619 } 7620 7621 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 7622 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 7623 } 7624 7625 /** 7626 * Check if remote supported features query has completed 7627 */ 7628 bool hci_remote_features_available(hci_con_handle_t handle){ 7629 hci_connection_t * connection = hci_connection_for_handle(handle); 7630 if (!connection) return false; 7631 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 7632 } 7633 7634 /** 7635 * Trigger remote supported features query 7636 */ 7637 7638 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 7639 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 7640 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 7641 } 7642 } 7643 7644 void hci_remote_features_query(hci_con_handle_t con_handle){ 7645 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7646 if (!connection) return; 7647 hci_trigger_remote_features_for_connection(connection); 7648 hci_run(); 7649 } 7650 7651 // GAP API 7652 /** 7653 * @bbrief enable/disable bonding. default is enabled 7654 * @praram enabled 7655 */ 7656 void gap_set_bondable_mode(int enable){ 7657 hci_stack->bondable = enable ? 1 : 0; 7658 } 7659 /** 7660 * @brief Get bondable mode. 7661 * @return 1 if bondable 7662 */ 7663 int gap_get_bondable_mode(void){ 7664 return hci_stack->bondable; 7665 } 7666 7667 /** 7668 * @brief map link keys to security levels 7669 */ 7670 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 7671 switch (link_key_type){ 7672 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7673 return LEVEL_4; 7674 case COMBINATION_KEY: 7675 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7676 return LEVEL_3; 7677 default: 7678 return LEVEL_2; 7679 } 7680 } 7681 7682 /** 7683 * @brief map link keys to secure connection yes/no 7684 */ 7685 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 7686 switch (link_key_type){ 7687 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7688 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7689 return true; 7690 default: 7691 return false; 7692 } 7693 } 7694 7695 /** 7696 * @brief map link keys to authenticated 7697 */ 7698 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 7699 switch (link_key_type){ 7700 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7701 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7702 return true; 7703 default: 7704 return false; 7705 } 7706 } 7707 7708 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 7709 log_info("gap_mitm_protection_required_for_security_level %u", level); 7710 return level > LEVEL_2; 7711 } 7712 7713 /** 7714 * @brief get current security level 7715 */ 7716 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 7717 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7718 if (!connection) return LEVEL_0; 7719 return gap_security_level_for_connection(connection); 7720 } 7721 7722 /** 7723 * @brief request connection to device to 7724 * @result GAP_AUTHENTICATION_RESULT 7725 */ 7726 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 7727 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7728 if (!connection){ 7729 hci_emit_security_level(con_handle, LEVEL_0); 7730 return; 7731 } 7732 7733 btstack_assert(hci_is_le_connection(connection) == false); 7734 7735 // 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) 7736 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 7737 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 7738 requested_level = LEVEL_4; 7739 } 7740 7741 gap_security_level_t current_level = gap_security_level(con_handle); 7742 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 7743 requested_level, connection->requested_security_level, current_level); 7744 7745 // authentication active if authentication request was sent or planned level > 0 7746 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 7747 if (authentication_active){ 7748 // authentication already active 7749 if (connection->requested_security_level < requested_level){ 7750 // increase requested level as new level is higher 7751 // TODO: handle re-authentication when done 7752 connection->requested_security_level = requested_level; 7753 } 7754 } else { 7755 // no request active, notify if security sufficient 7756 if (requested_level <= current_level){ 7757 hci_emit_security_level(con_handle, current_level); 7758 return; 7759 } 7760 7761 // store request 7762 connection->requested_security_level = requested_level; 7763 7764 // start to authenticate connection 7765 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 7766 7767 // request remote features if not already active, also trigger hci_run 7768 hci_remote_features_query(con_handle); 7769 } 7770 } 7771 7772 /** 7773 * @brief start dedicated bonding with device. disconnect after bonding 7774 * @param device 7775 * @param request MITM protection 7776 * @result GAP_DEDICATED_BONDING_COMPLETE 7777 */ 7778 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 7779 7780 // create connection state machine 7781 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 7782 7783 if (!connection){ 7784 return BTSTACK_MEMORY_ALLOC_FAILED; 7785 } 7786 7787 // delete linkn key 7788 gap_drop_link_key_for_bd_addr(device); 7789 7790 // configure LEVEL_2/3, dedicated bonding 7791 connection->state = SEND_CREATE_CONNECTION; 7792 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 7793 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 7794 connection->bonding_flags = BONDING_DEDICATED; 7795 7796 // wait for GAP Security Result and send GAP Dedicated Bonding complete 7797 7798 // handle: connnection failure (connection complete != ok) 7799 // handle: authentication failure 7800 // handle: disconnect on done 7801 7802 hci_run(); 7803 7804 return 0; 7805 } 7806 7807 void gap_set_local_name(const char * local_name){ 7808 hci_stack->local_name = local_name; 7809 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7810 // also update EIR if not set by user 7811 if (hci_stack->eir_data == NULL){ 7812 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7813 } 7814 hci_run(); 7815 } 7816 #endif 7817 7818 7819 #ifdef ENABLE_BLE 7820 7821 #ifdef ENABLE_LE_CENTRAL 7822 void gap_start_scan(void){ 7823 hci_stack->le_scanning_enabled = true; 7824 hci_run(); 7825 } 7826 7827 void gap_stop_scan(void){ 7828 hci_stack->le_scanning_enabled = false; 7829 hci_run(); 7830 } 7831 7832 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7833 hci_stack->le_scan_type = scan_type; 7834 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7835 hci_stack->le_scan_interval = scan_interval; 7836 hci_stack->le_scan_window = scan_window; 7837 hci_stack->le_scanning_param_update = true; 7838 hci_run(); 7839 } 7840 7841 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7842 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7843 } 7844 7845 void gap_set_scan_duplicate_filter(bool enabled){ 7846 hci_stack->le_scan_filter_duplicates = enabled ? 1 : 0; 7847 } 7848 7849 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7850 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7851 if (!conn){ 7852 // disallow if le connection is already outgoing 7853 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7854 log_error("le connection already active"); 7855 return ERROR_CODE_COMMAND_DISALLOWED; 7856 } 7857 7858 log_info("gap_connect: no connection exists yet, creating context"); 7859 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7860 if (!conn){ 7861 // notify client that alloc failed 7862 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7863 log_info("gap_connect: failed to alloc hci_connection_t"); 7864 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7865 } 7866 7867 // set le connecting state 7868 if (hci_is_le_connection_type(addr_type)){ 7869 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7870 } 7871 7872 conn->state = SEND_CREATE_CONNECTION; 7873 log_info("gap_connect: send create connection next"); 7874 hci_run(); 7875 return ERROR_CODE_SUCCESS; 7876 } 7877 7878 if (!hci_is_le_connection(conn) || 7879 (conn->state == SEND_CREATE_CONNECTION) || 7880 (conn->state == SENT_CREATE_CONNECTION)) { 7881 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7882 log_error("gap_connect: classic connection or connect is already being created"); 7883 return GATT_CLIENT_IN_WRONG_STATE; 7884 } 7885 7886 // check if connection was just disconnected 7887 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7888 log_info("gap_connect: send create connection (again)"); 7889 conn->state = SEND_CREATE_CONNECTION; 7890 hci_run(); 7891 return ERROR_CODE_SUCCESS; 7892 } 7893 7894 log_info("gap_connect: context exists with state %u", conn->state); 7895 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7896 hci_run(); 7897 return ERROR_CODE_SUCCESS; 7898 } 7899 7900 // @assumption: only a single outgoing LE Connection exists 7901 static hci_connection_t * gap_get_outgoing_connection(void){ 7902 btstack_linked_item_t *it; 7903 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7904 hci_connection_t * conn = (hci_connection_t *) it; 7905 if (!hci_is_le_connection(conn)) continue; 7906 switch (conn->state){ 7907 case SEND_CREATE_CONNECTION: 7908 case SENT_CREATE_CONNECTION: 7909 return conn; 7910 default: 7911 break; 7912 }; 7913 } 7914 return NULL; 7915 } 7916 7917 uint8_t gap_connect_cancel(void){ 7918 hci_connection_t * conn; 7919 switch (hci_stack->le_connecting_request){ 7920 case LE_CONNECTING_IDLE: 7921 break; 7922 case LE_CONNECTING_WHITELIST: 7923 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7924 hci_run(); 7925 break; 7926 case LE_CONNECTING_DIRECT: 7927 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7928 conn = gap_get_outgoing_connection(); 7929 if (conn == NULL){ 7930 hci_run(); 7931 } else { 7932 switch (conn->state){ 7933 case SEND_CREATE_CONNECTION: 7934 // skip sending create connection and emit event instead 7935 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7936 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7937 btstack_memory_hci_connection_free( conn ); 7938 break; 7939 case SENT_CREATE_CONNECTION: 7940 // let hci_run_general_gap_le cancel outgoing connection 7941 hci_run(); 7942 break; 7943 default: 7944 break; 7945 } 7946 } 7947 break; 7948 default: 7949 btstack_unreachable(); 7950 break; 7951 } 7952 return ERROR_CODE_SUCCESS; 7953 } 7954 7955 /** 7956 * @brief Set connection parameters for outgoing connections 7957 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7958 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7959 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7960 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7961 * @param conn_latency, default: 4 7962 * @param supervision_timeout (unit: 10ms), default: 720 ms 7963 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7964 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7965 */ 7966 7967 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7968 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7969 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7970 hci_stack->le_connection_scan_interval = conn_scan_interval; 7971 hci_stack->le_connection_scan_window = conn_scan_window; 7972 hci_stack->le_connection_interval_min = conn_interval_min; 7973 hci_stack->le_connection_interval_max = conn_interval_max; 7974 hci_stack->le_connection_latency = conn_latency; 7975 hci_stack->le_supervision_timeout = supervision_timeout; 7976 hci_stack->le_minimum_ce_length = min_ce_length; 7977 hci_stack->le_maximum_ce_length = max_ce_length; 7978 } 7979 #endif 7980 7981 /** 7982 * @brief Updates the connection parameters 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_update_connection_parameters(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_CHANGE_HCI_CON_PARAMETERS; 7999 hci_run(); 8000 return 0; 8001 } 8002 8003 /** 8004 * @brief Request an update of the connection parameter for a given LE connection 8005 * @param handle 8006 * @param conn_interval_min (unit: 1.25ms) 8007 * @param conn_interval_max (unit: 1.25ms) 8008 * @param conn_latency 8009 * @param supervision_timeout (unit: 10ms) 8010 * @return 0 if ok 8011 */ 8012 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 8013 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 8014 hci_connection_t * connection = hci_connection_for_handle(con_handle); 8015 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8016 connection->le_conn_interval_min = conn_interval_min; 8017 connection->le_conn_interval_max = conn_interval_max; 8018 connection->le_conn_latency = conn_latency; 8019 connection->le_supervision_timeout = supervision_timeout; 8020 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 8021 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 8022 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 8023 return 0; 8024 } 8025 8026 #ifdef ENABLE_LE_PERIPHERAL 8027 8028 /** 8029 * @brief Set Advertisement Data 8030 * @param advertising_data_length 8031 * @param advertising_data (max 31 octets) 8032 * @note data is not copied, pointer has to stay valid 8033 */ 8034 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 8035 hci_stack->le_advertisements_data_len = advertising_data_length; 8036 hci_stack->le_advertisements_data = advertising_data; 8037 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 8038 hci_run(); 8039 } 8040 8041 /** 8042 * @brief Set Scan Response Data 8043 * @param advertising_data_length 8044 * @param advertising_data (max 31 octets) 8045 * @note data is not copied, pointer has to stay valid 8046 */ 8047 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 8048 hci_stack->le_scan_response_data_len = scan_response_data_length; 8049 hci_stack->le_scan_response_data = scan_response_data; 8050 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 8051 hci_run(); 8052 } 8053 8054 /** 8055 * @brief Set Advertisement Parameters 8056 * @param adv_int_min 8057 * @param adv_int_max 8058 * @param adv_type 8059 * @param direct_address_type 8060 * @param direct_address 8061 * @param channel_map 8062 * @param filter_policy 8063 * 8064 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 8065 */ 8066 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 8067 uint8_t direct_address_typ, bd_addr_t direct_address, 8068 uint8_t channel_map, uint8_t filter_policy) { 8069 8070 hci_stack->le_advertisements_interval_min = adv_int_min; 8071 hci_stack->le_advertisements_interval_max = adv_int_max; 8072 hci_stack->le_advertisements_type = adv_type; 8073 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 8074 hci_stack->le_advertisements_channel_map = channel_map; 8075 hci_stack->le_advertisements_filter_policy = filter_policy; 8076 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 8077 6); 8078 8079 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8080 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 8081 hci_run(); 8082 } 8083 8084 /** 8085 * @brief Enable/Disable Advertisements 8086 * @param enabled 8087 */ 8088 void gap_advertisements_enable(int enabled){ 8089 if (enabled == 0){ 8090 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 8091 } else { 8092 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 8093 } 8094 hci_update_advertisements_enabled_for_current_roles(); 8095 hci_run(); 8096 } 8097 8098 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8099 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 8100 btstack_linked_list_iterator_t it; 8101 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 8102 while (btstack_linked_list_iterator_has_next(&it)){ 8103 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 8104 if ( item->advertising_handle == advertising_handle ) { 8105 return item; 8106 } 8107 } 8108 return NULL; 8109 } 8110 8111 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 8112 // find free advertisement handle 8113 uint8_t advertisement_handle; 8114 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 8115 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 8116 } 8117 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8118 // clear 8119 memset(storage, 0, sizeof(le_advertising_set_t)); 8120 // copy params 8121 storage->advertising_handle = advertisement_handle; 8122 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 8123 // add to list 8124 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 8125 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 8126 *out_advertising_handle = advertisement_handle; 8127 // set tasks and start 8128 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8129 hci_run(); 8130 return ERROR_CODE_SUCCESS; 8131 } 8132 8133 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 8134 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8135 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8136 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 8137 // set tasks and start 8138 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8139 hci_run(); 8140 return ERROR_CODE_SUCCESS; 8141 } 8142 8143 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 8144 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8145 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8146 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 8147 return ERROR_CODE_SUCCESS; 8148 } 8149 8150 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 8151 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8152 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8153 memcpy(advertising_set->random_address, random_address, 6); 8154 // set tasks and start 8155 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 8156 hci_run(); 8157 return ERROR_CODE_SUCCESS; 8158 } 8159 8160 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 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->adv_data = advertising_data; 8164 advertising_set->adv_data_len = advertising_data_length; 8165 // set tasks and start 8166 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 8167 hci_run(); 8168 return ERROR_CODE_SUCCESS; 8169 } 8170 8171 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){ 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 advertising_set->scan_data = scan_response_data; 8175 advertising_set->scan_data_len = scan_response_data_length; 8176 // set tasks and start 8177 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 8178 hci_run(); 8179 return ERROR_CODE_SUCCESS; 8180 } 8181 8182 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 8183 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8184 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8185 advertising_set->enable_timeout = timeout; 8186 advertising_set->enable_max_scan_events = num_extended_advertising_events; 8187 // set tasks and start 8188 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 8189 hci_run(); 8190 return ERROR_CODE_SUCCESS; 8191 } 8192 8193 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 8194 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8195 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8196 // set tasks and start 8197 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 8198 hci_run(); 8199 return ERROR_CODE_SUCCESS; 8200 } 8201 8202 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 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 // set tasks and start 8206 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 8207 hci_run(); 8208 return ERROR_CODE_SUCCESS; 8209 } 8210 8211 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 8212 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 8213 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8214 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8215 // periodic advertising requires neither connectable, scannable, legacy or anonymous 8216 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8217 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 8218 // set tasks and start 8219 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 8220 hci_run(); 8221 return ERROR_CODE_SUCCESS; 8222 } 8223 8224 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 8225 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8226 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8227 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 8228 return ERROR_CODE_SUCCESS; 8229 } 8230 8231 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 8232 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8233 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8234 advertising_set->periodic_data = periodic_data; 8235 advertising_set->periodic_data_len = periodic_data_length; 8236 // set tasks and start 8237 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 8238 hci_run(); 8239 return ERROR_CODE_SUCCESS; 8240 } 8241 8242 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 8243 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8244 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8245 // set tasks and start 8246 advertising_set->periodic_include_adi = include_adi; 8247 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 8248 hci_run(); 8249 return ERROR_CODE_SUCCESS; 8250 } 8251 8252 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 8253 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8254 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8255 // set tasks and start 8256 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 8257 hci_run(); 8258 return ERROR_CODE_SUCCESS; 8259 } 8260 8261 uint8_t gap_periodic_advertising_sync_transfer_set_default_parameters(uint8_t mode, uint16_t skip, uint16_t sync_timeout, uint8_t cte_type){ 8262 hci_stack->le_past_mode = mode; 8263 hci_stack->le_past_skip = skip; 8264 hci_stack->le_past_sync_timeout = sync_timeout; 8265 hci_stack->le_past_cte_type = cte_type; 8266 hci_stack->le_past_set_default_params = true; 8267 hci_run(); 8268 return ERROR_CODE_SUCCESS; 8269 } 8270 8271 uint8_t gap_periodic_advertising_sync_transfer_send(hci_con_handle_t con_handle, uint16_t service_data, hci_con_handle_t sync_handle){ 8272 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8273 if (hci_connection == NULL){ 8274 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8275 } 8276 hci_connection->le_past_sync_handle = sync_handle; 8277 hci_connection->le_past_service_data = service_data; 8278 hci_run(); 8279 return ERROR_CODE_SUCCESS; 8280 } 8281 8282 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 8283 8284 #endif 8285 8286 #endif 8287 8288 void hci_le_set_own_address_type(uint8_t own_address_type){ 8289 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 8290 if (own_address_type == hci_stack->le_own_addr_type) return; 8291 hci_stack->le_own_addr_type = own_address_type; 8292 8293 #ifdef ENABLE_LE_PERIPHERAL 8294 // update advertisement parameters, too 8295 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8296 hci_run(); 8297 #endif 8298 #ifdef ENABLE_LE_CENTRAL 8299 // note: we don't update scan parameters or modify ongoing connection attempts 8300 #endif 8301 } 8302 8303 void hci_le_random_address_set(const bd_addr_t random_address){ 8304 memcpy(hci_stack->le_random_address, random_address, 6); 8305 hci_stack->le_random_address_set = true; 8306 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 8307 hci_run(); 8308 } 8309 8310 #endif 8311 8312 uint8_t gap_disconnect(hci_con_handle_t handle){ 8313 hci_connection_t * conn = hci_connection_for_handle(handle); 8314 if (!conn){ 8315 hci_emit_disconnection_complete(handle, 0); 8316 return 0; 8317 } 8318 // ignore if already disconnected 8319 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 8320 return 0; 8321 } 8322 conn->state = SEND_DISCONNECT; 8323 hci_run(); 8324 return 0; 8325 } 8326 8327 int gap_read_rssi(hci_con_handle_t con_handle){ 8328 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8329 if (hci_connection == NULL) return 0; 8330 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 8331 hci_run(); 8332 return 1; 8333 } 8334 8335 /** 8336 * @brief Get connection type 8337 * @param con_handle 8338 * @result connection_type 8339 */ 8340 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 8341 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 8342 if (!conn) return GAP_CONNECTION_INVALID; 8343 switch (conn->address_type){ 8344 case BD_ADDR_TYPE_LE_PUBLIC: 8345 case BD_ADDR_TYPE_LE_RANDOM: 8346 return GAP_CONNECTION_LE; 8347 case BD_ADDR_TYPE_SCO: 8348 return GAP_CONNECTION_SCO; 8349 case BD_ADDR_TYPE_ACL: 8350 return GAP_CONNECTION_ACL; 8351 default: 8352 return GAP_CONNECTION_INVALID; 8353 } 8354 } 8355 8356 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 8357 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 8358 if (!conn) return HCI_ROLE_INVALID; 8359 return (hci_role_t) conn->role; 8360 } 8361 8362 8363 #ifdef ENABLE_CLASSIC 8364 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 8365 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8366 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8367 conn->request_role = role; 8368 hci_run(); 8369 return ERROR_CODE_SUCCESS; 8370 } 8371 #endif 8372 8373 #ifdef ENABLE_BLE 8374 8375 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){ 8376 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8377 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8378 8379 conn->le_phy_update_all_phys = all_phys; 8380 conn->le_phy_update_tx_phys = tx_phys; 8381 conn->le_phy_update_rx_phys = rx_phys; 8382 conn->le_phy_update_phy_options = phy_options; 8383 8384 hci_run(); 8385 8386 return 0; 8387 } 8388 8389 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8390 // check if already in list 8391 btstack_linked_list_iterator_t it; 8392 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8393 while (btstack_linked_list_iterator_has_next(&it)) { 8394 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 8395 if (entry->address_type != address_type) { 8396 continue; 8397 } 8398 if (memcmp(entry->address, address, 6) != 0) { 8399 continue; 8400 } 8401 // disallow if already scheduled to add 8402 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 8403 return ERROR_CODE_COMMAND_DISALLOWED; 8404 } 8405 // still on controller, but scheduled to remove -> re-add 8406 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 8407 return ERROR_CODE_SUCCESS; 8408 } 8409 // alloc and add to list 8410 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 8411 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8412 entry->address_type = address_type; 8413 (void)memcpy(entry->address, address, 6); 8414 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 8415 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 8416 return ERROR_CODE_SUCCESS; 8417 } 8418 8419 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8420 btstack_linked_list_iterator_t it; 8421 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8422 while (btstack_linked_list_iterator_has_next(&it)){ 8423 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8424 if (entry->address_type != address_type) { 8425 continue; 8426 } 8427 if (memcmp(entry->address, address, 6) != 0) { 8428 continue; 8429 } 8430 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8431 // remove from controller if already present 8432 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8433 } else { 8434 // directly remove entry from whitelist 8435 btstack_linked_list_iterator_remove(&it); 8436 btstack_memory_whitelist_entry_free(entry); 8437 } 8438 return ERROR_CODE_SUCCESS; 8439 } 8440 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8441 } 8442 8443 static void hci_whitelist_clear(void){ 8444 btstack_linked_list_iterator_t it; 8445 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8446 while (btstack_linked_list_iterator_has_next(&it)){ 8447 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8448 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8449 // remove from controller if already present 8450 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8451 continue; 8452 } 8453 // directly remove entry from whitelist 8454 btstack_linked_list_iterator_remove(&it); 8455 btstack_memory_whitelist_entry_free(entry); 8456 } 8457 } 8458 8459 /** 8460 * @brief Clear Whitelist 8461 * @return 0 if ok 8462 */ 8463 uint8_t gap_whitelist_clear(void){ 8464 hci_whitelist_clear(); 8465 hci_run(); 8466 return ERROR_CODE_SUCCESS; 8467 } 8468 8469 /** 8470 * @brief Add Device to Whitelist 8471 * @param address_typ 8472 * @param address 8473 * @return 0 if ok 8474 */ 8475 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8476 uint8_t status = hci_whitelist_add(address_type, address); 8477 if (status){ 8478 return status; 8479 } 8480 hci_run(); 8481 return ERROR_CODE_SUCCESS; 8482 } 8483 8484 /** 8485 * @brief Remove Device from Whitelist 8486 * @param address_typ 8487 * @param address 8488 * @return 0 if ok 8489 */ 8490 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8491 uint8_t status = hci_whitelist_remove(address_type, address); 8492 if (status){ 8493 return status; 8494 } 8495 hci_run(); 8496 return ERROR_CODE_SUCCESS; 8497 } 8498 8499 #ifdef ENABLE_LE_CENTRAL 8500 /** 8501 * @brief Connect with Whitelist 8502 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 8503 * @return - if ok 8504 */ 8505 uint8_t gap_connect_with_whitelist(void){ 8506 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 8507 return ERROR_CODE_COMMAND_DISALLOWED; 8508 } 8509 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8510 hci_run(); 8511 return ERROR_CODE_SUCCESS; 8512 } 8513 8514 /** 8515 * @brief Auto Connection Establishment - Start Connecting to device 8516 * @param address_typ 8517 * @param address 8518 * @return 0 if ok 8519 */ 8520 uint8_t gap_auto_connection_start(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 uint8_t status = hci_whitelist_add(address_type, address); 8526 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 8527 return status; 8528 } 8529 8530 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8531 8532 hci_run(); 8533 return ERROR_CODE_SUCCESS; 8534 } 8535 8536 /** 8537 * @brief Auto Connection Establishment - Stop Connecting to device 8538 * @param address_typ 8539 * @param address 8540 * @return 0 if ok 8541 */ 8542 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 8543 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8544 return ERROR_CODE_COMMAND_DISALLOWED; 8545 } 8546 8547 hci_whitelist_remove(address_type, address); 8548 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 8549 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8550 } 8551 hci_run(); 8552 return 0; 8553 } 8554 8555 /** 8556 * @brief Auto Connection Establishment - Stop everything 8557 * @note Convenience function to stop all active auto connection attempts 8558 */ 8559 uint8_t gap_auto_connection_stop_all(void){ 8560 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 8561 return ERROR_CODE_COMMAND_DISALLOWED; 8562 } 8563 hci_whitelist_clear(); 8564 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8565 hci_run(); 8566 return ERROR_CODE_SUCCESS; 8567 } 8568 8569 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 8570 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8571 if (!conn) return 0; 8572 return conn->le_connection_interval; 8573 } 8574 #endif 8575 #endif 8576 8577 #ifdef ENABLE_CLASSIC 8578 /** 8579 * @brief Set Extended Inquiry Response data 8580 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 8581 * @note has to be done before stack starts up 8582 */ 8583 void gap_set_extended_inquiry_response(const uint8_t * data){ 8584 hci_stack->eir_data = data; 8585 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 8586 hci_run(); 8587 } 8588 8589 /** 8590 * @brief Start GAP Classic Inquiry 8591 * @param duration in 1.28s units 8592 * @return 0 if ok 8593 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 8594 */ 8595 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 8596 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8597 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8598 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 8599 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8600 } 8601 hci_stack->inquiry_state = duration_in_1280ms_units; 8602 hci_stack->inquiry_max_period_length = 0; 8603 hci_stack->inquiry_min_period_length = 0; 8604 hci_run(); 8605 return 0; 8606 } 8607 8608 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 8609 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8610 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8611 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8612 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8613 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8614 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8615 8616 hci_stack->inquiry_state = duration; 8617 hci_stack->inquiry_max_period_length = max_period_length; 8618 hci_stack->inquiry_min_period_length = min_period_length; 8619 hci_run(); 8620 return 0; 8621 } 8622 8623 /** 8624 * @brief Stop GAP Classic Inquiry 8625 * @return 0 if ok 8626 */ 8627 int gap_inquiry_stop(void){ 8628 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 8629 // emit inquiry complete event, before it even started 8630 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 8631 hci_emit_event(event, sizeof(event), 1); 8632 return 0; 8633 } 8634 switch (hci_stack->inquiry_state){ 8635 case GAP_INQUIRY_STATE_ACTIVE: 8636 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 8637 hci_run(); 8638 return ERROR_CODE_SUCCESS; 8639 case GAP_INQUIRY_STATE_PERIODIC: 8640 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 8641 hci_run(); 8642 return ERROR_CODE_SUCCESS; 8643 default: 8644 return ERROR_CODE_COMMAND_DISALLOWED; 8645 } 8646 } 8647 8648 void gap_inquiry_set_lap(uint32_t lap){ 8649 hci_stack->inquiry_lap = lap; 8650 } 8651 8652 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 8653 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 8654 hci_stack->inquiry_scan_window = inquiry_scan_window; 8655 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 8656 hci_run(); 8657 } 8658 8659 8660 /** 8661 * @brief Remote Name Request 8662 * @param addr 8663 * @param page_scan_repetition_mode 8664 * @param clock_offset only used when bit 15 is set 8665 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 8666 */ 8667 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 8668 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8669 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 8670 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 8671 hci_stack->remote_name_clock_offset = clock_offset; 8672 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 8673 hci_run(); 8674 return 0; 8675 } 8676 8677 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 8678 hci_stack->gap_pairing_state = state; 8679 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 8680 hci_run(); 8681 return 0; 8682 } 8683 8684 /** 8685 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 8686 * @param addr 8687 * @param pin_data 8688 * @param pin_len 8689 * @return 0 if ok 8690 */ 8691 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 8692 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8693 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 8694 hci_stack->gap_pairing_pin_len = pin_len; 8695 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 8696 } 8697 8698 /** 8699 * @brief Legacy Pairing Pin Code Response 8700 * @param addr 8701 * @param pin 8702 * @return 0 if ok 8703 */ 8704 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 8705 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, (uint8_t) strlen(pin)); 8706 } 8707 8708 /** 8709 * @brief Abort Legacy Pairing 8710 * @param addr 8711 * @param pin 8712 * @return 0 if ok 8713 */ 8714 int gap_pin_code_negative(bd_addr_t addr){ 8715 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8716 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 8717 } 8718 8719 /** 8720 * @brief SSP Passkey Response 8721 * @param addr 8722 * @param passkey 8723 * @return 0 if ok 8724 */ 8725 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 8726 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8727 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 8728 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 8729 } 8730 8731 /** 8732 * @brief Abort SSP Passkey Entry/Pairing 8733 * @param addr 8734 * @param pin 8735 * @return 0 if ok 8736 */ 8737 int gap_ssp_passkey_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_PASSKEY_NEGATIVE); 8740 } 8741 8742 /** 8743 * @brief Accept SSP Numeric Comparison 8744 * @param addr 8745 * @param passkey 8746 * @return 0 if ok 8747 */ 8748 int gap_ssp_confirmation_response(const bd_addr_t addr){ 8749 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8750 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 8751 } 8752 8753 /** 8754 * @brief Abort SSP Numeric Comparison/Pairing 8755 * @param addr 8756 * @param pin 8757 * @return 0 if ok 8758 */ 8759 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 8760 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8761 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 8762 } 8763 8764 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 8765 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 8766 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8767 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8768 connectionSetAuthenticationFlags(conn, flag); 8769 hci_run(); 8770 return ERROR_CODE_SUCCESS; 8771 } 8772 #endif 8773 8774 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 8775 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 8776 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 8777 } 8778 8779 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 8780 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 8781 } 8782 #endif 8783 8784 #ifdef ENABLE_CLASSIC_PAIRING_OOB 8785 /** 8786 * @brief Report Remote OOB Data 8787 * @param bd_addr 8788 * @param c_192 Simple Pairing Hash C derived from P-192 public key 8789 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 8790 * @param c_256 Simple Pairing Hash C derived from P-256 public key 8791 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 8792 */ 8793 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){ 8794 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8795 if (connection == NULL) { 8796 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8797 } 8798 connection->classic_oob_c_192 = c_192; 8799 connection->classic_oob_r_192 = r_192; 8800 8801 // ignore P-256 if not supported by us 8802 if (hci_stack->secure_connections_active){ 8803 connection->classic_oob_c_256 = c_256; 8804 connection->classic_oob_r_256 = r_256; 8805 } 8806 8807 return ERROR_CODE_SUCCESS; 8808 } 8809 /** 8810 * @brief Generate new OOB data 8811 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 8812 */ 8813 void gap_ssp_generate_oob_data(void){ 8814 hci_stack->classic_read_local_oob_data = true; 8815 hci_run(); 8816 } 8817 8818 #endif 8819 8820 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 8821 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 8822 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8823 if (connection == NULL) { 8824 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8825 } 8826 8827 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 8828 connection->link_key_type = type; 8829 8830 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 8831 } 8832 8833 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 8834 /** 8835 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 8836 * @param inquiry_mode see bluetooth_defines.h 8837 */ 8838 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8839 hci_stack->inquiry_mode = inquiry_mode; 8840 } 8841 8842 /** 8843 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8844 */ 8845 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8846 hci_stack->sco_voice_setting = voice_setting; 8847 } 8848 8849 /** 8850 * @brief Get SCO Voice Setting 8851 * @return current voice setting 8852 */ 8853 uint16_t hci_get_sco_voice_setting(void){ 8854 return hci_stack->sco_voice_setting; 8855 } 8856 8857 static int hci_have_usb_transport(void){ 8858 if (!hci_stack->hci_transport) return 0; 8859 const char * transport_name = hci_stack->hci_transport->name; 8860 if (!transport_name) return 0; 8861 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8862 } 8863 8864 /** @brief Get SCO packet length for current SCO Voice setting 8865 * @note Using SCO packets of the exact length is required for USB transfer 8866 * @return Length of SCO packets in bytes (not audio frames) 8867 */ 8868 uint16_t hci_get_sco_packet_length(void){ 8869 uint16_t sco_packet_length = 0; 8870 8871 #ifdef ENABLE_SCO_OVER_HCI 8872 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8873 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8874 8875 if (hci_have_usb_transport()){ 8876 // see Core Spec for H2 USB Transfer. 8877 // 3 byte SCO header + 24 bytes per connection 8878 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8879 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8880 } else { 8881 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8882 sco_packet_length = 3 + 60 * multiplier; 8883 // assert that it still fits inside an SCO buffer 8884 if (sco_packet_length > (hci_stack->sco_data_packet_length + 3)){ 8885 sco_packet_length = 3 + 60; 8886 } 8887 } 8888 #endif 8889 8890 #ifdef HAVE_SCO_TRANSPORT 8891 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8892 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8893 sco_packet_length = 3 + 60 * multiplier; 8894 #endif 8895 return sco_packet_length; 8896 } 8897 8898 /** 8899 * @brief Sets the master/slave policy 8900 * @param policy (0: attempt to become master, 1: let connecting device decide) 8901 */ 8902 void hci_set_master_slave_policy(uint8_t policy){ 8903 hci_stack->master_slave_policy = policy; 8904 } 8905 8906 #endif 8907 8908 HCI_STATE hci_get_state(void){ 8909 return hci_stack->state; 8910 } 8911 8912 #ifdef ENABLE_CLASSIC 8913 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8914 hci_stack->gap_classic_accept_callback = accept_callback; 8915 } 8916 #endif 8917 8918 /** 8919 * @brief Set callback for Bluetooth Hardware Error 8920 */ 8921 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8922 hci_stack->hardware_error_callback = fn; 8923 } 8924 8925 void hci_disconnect_all(void){ 8926 btstack_linked_list_iterator_t it; 8927 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8928 while (btstack_linked_list_iterator_has_next(&it)){ 8929 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8930 if (con->state == SENT_DISCONNECT) continue; 8931 con->state = SEND_DISCONNECT; 8932 } 8933 hci_run(); 8934 } 8935 8936 uint16_t hci_get_manufacturer(void){ 8937 return hci_stack->manufacturer; 8938 } 8939 8940 #ifdef ENABLE_BLE 8941 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8942 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8943 if (!hci_con) return NULL; 8944 return &hci_con->sm_connection; 8945 } 8946 8947 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8948 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8949 #endif 8950 8951 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8952 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8953 if (hci_connection == NULL) return 0; 8954 if (hci_is_le_connection(hci_connection)){ 8955 #ifdef ENABLE_BLE 8956 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8957 if (sm_conn->sm_connection_encrypted) { 8958 return sm_conn->sm_actual_encryption_key_size; 8959 } 8960 #endif 8961 } else { 8962 #ifdef ENABLE_CLASSIC 8963 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8964 return hci_connection->encryption_key_size; 8965 } 8966 #endif 8967 } 8968 return 0; 8969 } 8970 8971 bool gap_authenticated(hci_con_handle_t con_handle){ 8972 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8973 if (hci_connection == NULL) return false; 8974 8975 switch (hci_connection->address_type){ 8976 #ifdef ENABLE_BLE 8977 case BD_ADDR_TYPE_LE_PUBLIC: 8978 case BD_ADDR_TYPE_LE_RANDOM: 8979 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8980 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8981 #endif 8982 #ifdef ENABLE_CLASSIC 8983 case BD_ADDR_TYPE_SCO: 8984 case BD_ADDR_TYPE_ACL: 8985 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8986 #endif 8987 default: 8988 return false; 8989 } 8990 } 8991 8992 bool gap_secure_connection(hci_con_handle_t con_handle){ 8993 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8994 if (hci_connection == NULL) return 0; 8995 8996 switch (hci_connection->address_type){ 8997 #ifdef ENABLE_BLE 8998 case BD_ADDR_TYPE_LE_PUBLIC: 8999 case BD_ADDR_TYPE_LE_RANDOM: 9000 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 9001 return hci_connection->sm_connection.sm_connection_sc != 0; 9002 #endif 9003 #ifdef ENABLE_CLASSIC 9004 case BD_ADDR_TYPE_SCO: 9005 case BD_ADDR_TYPE_ACL: 9006 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 9007 #endif 9008 default: 9009 return false; 9010 } 9011 } 9012 9013 bool gap_bonded(hci_con_handle_t con_handle){ 9014 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 9015 if (hci_connection == NULL) return 0; 9016 9017 #ifdef ENABLE_CLASSIC 9018 link_key_t link_key; 9019 link_key_type_t link_key_type; 9020 #endif 9021 switch (hci_connection->address_type){ 9022 #ifdef ENABLE_BLE 9023 case BD_ADDR_TYPE_LE_PUBLIC: 9024 case BD_ADDR_TYPE_LE_RANDOM: 9025 return hci_connection->sm_connection.sm_le_db_index >= 0; 9026 #endif 9027 #ifdef ENABLE_CLASSIC 9028 case BD_ADDR_TYPE_SCO: 9029 case BD_ADDR_TYPE_ACL: 9030 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 9031 #endif 9032 default: 9033 return false; 9034 } 9035 } 9036 9037 #ifdef ENABLE_BLE 9038 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 9039 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 9040 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 9041 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 9042 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 9043 return sm_conn->sm_connection_authorization_state; 9044 } 9045 #endif 9046 9047 #ifdef ENABLE_CLASSIC 9048 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){ 9049 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9050 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9051 conn->sniff_min_interval = sniff_min_interval; 9052 conn->sniff_max_interval = sniff_max_interval; 9053 conn->sniff_attempt = sniff_attempt; 9054 conn->sniff_timeout = sniff_timeout; 9055 hci_run(); 9056 return 0; 9057 } 9058 9059 /** 9060 * @brief Exit Sniff mode 9061 * @param con_handle 9062 @ @return 0 if ok 9063 */ 9064 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 9065 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9066 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9067 conn->sniff_min_interval = 0xffff; 9068 hci_run(); 9069 return 0; 9070 } 9071 9072 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){ 9073 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9074 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9075 conn->sniff_subrating_max_latency = max_latency; 9076 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 9077 conn->sniff_subrating_min_local_timeout = min_local_timeout; 9078 hci_run(); 9079 return ERROR_CODE_SUCCESS; 9080 } 9081 9082 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){ 9083 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9084 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9085 conn->qos_service_type = service_type; 9086 conn->qos_token_rate = token_rate; 9087 conn->qos_peak_bandwidth = peak_bandwidth; 9088 conn->qos_latency = latency; 9089 conn->qos_delay_variation = delay_variation; 9090 hci_run(); 9091 return ERROR_CODE_SUCCESS; 9092 } 9093 9094 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 9095 hci_stack->new_page_scan_interval = page_scan_interval; 9096 hci_stack->new_page_scan_window = page_scan_window; 9097 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 9098 hci_run(); 9099 } 9100 9101 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 9102 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 9103 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 9104 hci_run(); 9105 } 9106 9107 void gap_set_page_timeout(uint16_t page_timeout){ 9108 hci_stack->page_timeout = page_timeout; 9109 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 9110 hci_run(); 9111 } 9112 9113 #endif 9114 9115 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 9116 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 9117 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 9118 if (le_device_db_index >= le_device_db_max_count()) return; 9119 uint8_t offset = le_device_db_index >> 3; 9120 uint8_t mask = 1 << (le_device_db_index & 7); 9121 hci_stack->le_resolving_list_add_entries[offset] |= mask; 9122 hci_stack->le_resolving_list_set_privacy_mode[offset] |= mask; 9123 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 9124 // note: go back to remove entries, otherwise, a remove + add will skip the add 9125 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_UPDATES_ENTRIES; 9126 } 9127 } 9128 9129 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 9130 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 9131 if (le_device_db_index >= le_device_db_max_count()) return; 9132 uint8_t offset = le_device_db_index >> 3; 9133 uint8_t mask = 1 << (le_device_db_index & 7); 9134 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 9135 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 9136 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_UPDATES_ENTRIES; 9137 } 9138 } 9139 9140 uint8_t gap_load_resolving_list_from_le_device_db(void){ 9141 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 9142 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 9143 } 9144 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 9145 // restart le resolving list update 9146 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 9147 } 9148 return ERROR_CODE_SUCCESS; 9149 } 9150 9151 void gap_set_peer_privacy_mode(le_privacy_mode_t privacy_mode ){ 9152 hci_stack->le_privacy_mode = privacy_mode; 9153 } 9154 #endif 9155 9156 #ifdef ENABLE_BLE 9157 #ifdef ENABLE_LE_CENTRAL 9158 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 9159 9160 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9161 // check if already in list 9162 btstack_linked_list_iterator_t it; 9163 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9164 while (btstack_linked_list_iterator_has_next(&it)) { 9165 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 9166 if (entry->sid != advertising_sid) { 9167 continue; 9168 } 9169 if (entry->address_type != address_type) { 9170 continue; 9171 } 9172 if (memcmp(entry->address, address, 6) != 0) { 9173 continue; 9174 } 9175 // disallow if already scheduled to add 9176 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 9177 return ERROR_CODE_COMMAND_DISALLOWED; 9178 } 9179 // still on controller, but scheduled to remove -> re-add 9180 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 9181 return ERROR_CODE_SUCCESS; 9182 } 9183 // alloc and add to list 9184 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 9185 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 9186 entry->sid = advertising_sid; 9187 entry->address_type = address_type; 9188 (void)memcpy(entry->address, address, 6); 9189 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 9190 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 9191 return ERROR_CODE_SUCCESS; 9192 } 9193 9194 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 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->sid != advertising_sid) { 9200 continue; 9201 } 9202 if (entry->address_type != address_type) { 9203 continue; 9204 } 9205 if (memcmp(entry->address, address, 6) != 0) { 9206 continue; 9207 } 9208 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 9209 // remove from controller if already present 9210 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 9211 } else { 9212 // directly remove entry from whitelist 9213 btstack_linked_list_iterator_remove(&it); 9214 btstack_memory_periodic_advertiser_list_entry_free(entry); 9215 } 9216 return ERROR_CODE_SUCCESS; 9217 } 9218 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9219 } 9220 9221 static void hci_periodic_advertiser_list_clear(void){ 9222 btstack_linked_list_iterator_t it; 9223 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9224 while (btstack_linked_list_iterator_has_next(&it)){ 9225 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 9226 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 9227 // remove from controller if already present 9228 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 9229 continue; 9230 } 9231 // directly remove entry from whitelist 9232 btstack_linked_list_iterator_remove(&it); 9233 btstack_memory_periodic_advertiser_list_entry_free(entry); 9234 } 9235 } 9236 9237 uint8_t gap_periodic_advertiser_list_clear(void){ 9238 hci_periodic_advertiser_list_clear(); 9239 hci_run(); 9240 return ERROR_CODE_SUCCESS; 9241 } 9242 9243 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9244 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 9245 if (status){ 9246 return status; 9247 } 9248 hci_run(); 9249 return ERROR_CODE_SUCCESS; 9250 } 9251 9252 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9253 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 9254 if (status){ 9255 return status; 9256 } 9257 hci_run(); 9258 return ERROR_CODE_SUCCESS; 9259 } 9260 9261 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 9262 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 9263 // abort if already active 9264 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 9265 return ERROR_CODE_COMMAND_DISALLOWED; 9266 } 9267 // store request 9268 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 9269 hci_stack->le_periodic_sync_options = options; 9270 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 9271 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 9272 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 9273 hci_stack->le_periodic_sync_skip = skip; 9274 hci_stack->le_periodic_sync_timeout = sync_timeout; 9275 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 9276 9277 hci_run(); 9278 return ERROR_CODE_SUCCESS; 9279 } 9280 9281 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 9282 // abort if not requested 9283 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 9284 return ERROR_CODE_COMMAND_DISALLOWED; 9285 } 9286 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 9287 hci_run(); 9288 return ERROR_CODE_SUCCESS; 9289 } 9290 9291 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 9292 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 9293 return ERROR_CODE_COMMAND_DISALLOWED; 9294 } 9295 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 9296 hci_run(); 9297 return ERROR_CODE_SUCCESS; 9298 } 9299 9300 #endif 9301 #endif 9302 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 9303 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id, 9304 hci_iso_stream_state_t state) { 9305 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 9306 if (iso_stream == NULL){ 9307 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 9308 } else { 9309 iso_stream->iso_type = iso_type; 9310 iso_stream->state = state; 9311 iso_stream->con_handle = con_handle; 9312 iso_stream->group_id = group_id; 9313 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 9314 return ERROR_CODE_SUCCESS; 9315 } 9316 } 9317 9318 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle){ 9319 btstack_linked_list_iterator_t it; 9320 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9321 while (btstack_linked_list_iterator_has_next(&it)){ 9322 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9323 if (iso_stream->con_handle == con_handle ) { 9324 return iso_stream; 9325 } 9326 } 9327 return NULL; 9328 } 9329 9330 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 9331 log_info("hci_iso_stream_finalize con_handle 0x%04x, group_id 0x%02x", iso_stream->con_handle, iso_stream->group_id); 9332 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 9333 btstack_memory_hci_iso_stream_free(iso_stream); 9334 } 9335 9336 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id) { 9337 btstack_linked_list_iterator_t it; 9338 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9339 while (btstack_linked_list_iterator_has_next(&it)){ 9340 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9341 if ((iso_stream->group_id == group_id) && 9342 (iso_stream->iso_type == iso_type)){ 9343 btstack_linked_list_iterator_remove(&it); 9344 btstack_memory_hci_iso_stream_free(iso_stream); 9345 } 9346 } 9347 } 9348 9349 static void hci_iso_stream_requested_finalize(uint8_t group_id) { 9350 btstack_linked_list_iterator_t it; 9351 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9352 while (btstack_linked_list_iterator_has_next(&it)){ 9353 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9354 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 9355 (iso_stream->group_id == group_id)){ 9356 btstack_linked_list_iterator_remove(&it); 9357 btstack_memory_hci_iso_stream_free(iso_stream); 9358 } 9359 } 9360 } 9361 static void hci_iso_stream_requested_confirm(uint8_t big_handle){ 9362 btstack_linked_list_iterator_t it; 9363 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9364 while (btstack_linked_list_iterator_has_next(&it)){ 9365 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9366 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 9367 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 9368 } 9369 } 9370 } 9371 9372 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 9373 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 9374 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 9375 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 9376 return (sdu_len_offset + 2 + sdu_len) == size; 9377 } 9378 9379 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 9380 if (hci_stack->iso_packet_handler == NULL) { 9381 return; 9382 } 9383 if (size < 4) { 9384 return; 9385 } 9386 9387 // parse header 9388 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 9389 uint16_t iso_data_len = little_endian_read_16(packet, 2); 9390 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 9391 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_handle); 9392 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 9393 9394 // assert packet is complete 9395 if ((iso_data_len + 4u) != size){ 9396 return; 9397 } 9398 9399 if ((pb_flag & 0x01) == 0){ 9400 if (pb_flag == 0x02){ 9401 // The ISO_Data_Load field contains a header and a complete SDU. 9402 if (hci_iso_sdu_complete(packet, size)) { 9403 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 9404 } 9405 } else { 9406 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 9407 if (iso_stream == NULL){ 9408 return; 9409 } 9410 if (size > HCI_ISO_PAYLOAD_SIZE){ 9411 return; 9412 } 9413 memcpy(iso_stream->reassembly_buffer, packet, size); 9414 // fix pb_flag 9415 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 9416 iso_stream->reassembly_pos = size; 9417 } 9418 } else { 9419 // iso_data_load contains continuation or last fragment of an SDU 9420 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 9421 if (ts_flag != 0){ 9422 return; 9423 } 9424 // append fragment 9425 if (iso_stream == NULL){ 9426 return; 9427 } 9428 if (iso_stream->reassembly_pos == 0){ 9429 return; 9430 } 9431 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 9432 // reset reassembly buffer 9433 iso_stream->reassembly_pos = 0; 9434 return; 9435 } 9436 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 9437 iso_stream->reassembly_pos += iso_data_len; 9438 9439 // deliver if last fragment and SDU complete 9440 if (pb_flag == 0x03){ 9441 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 9442 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 9443 } 9444 iso_stream->reassembly_pos = 0; 9445 } 9446 } 9447 } 9448 9449 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status){ 9450 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9451 uint16_t pos = 0; 9452 event[pos++] = HCI_EVENT_META_GAP; 9453 event[pos++] = 4 + (2 * big->num_bis); 9454 event[pos++] = GAP_SUBEVENT_BIG_CREATED; 9455 event[pos++] = status; 9456 event[pos++] = big->big_handle; 9457 event[pos++] = big->num_bis; 9458 uint8_t i; 9459 for (i=0;i<big->num_bis;i++){ 9460 little_endian_store_16(event, pos, big->bis_con_handles[i]); 9461 pos += 2; 9462 } 9463 hci_emit_event(event, pos, 0); 9464 } 9465 9466 static void hci_emit_cig_created(const le_audio_cig_t * cig, uint8_t status){ 9467 uint8_t event [6 + (MAX_NR_CIS * 2)]; 9468 uint16_t pos = 0; 9469 event[pos++] = HCI_EVENT_META_GAP; 9470 event[pos++] = 4 + (2 * cig->num_cis); 9471 event[pos++] = GAP_SUBEVENT_CIG_CREATED; 9472 event[pos++] = status; 9473 event[pos++] = cig->cig_id; 9474 event[pos++] = cig->num_cis; 9475 uint8_t i; 9476 for (i=0;i<cig->num_cis;i++){ 9477 little_endian_store_16(event, pos, cig->cis_con_handles[i]); 9478 pos += 2; 9479 } 9480 hci_emit_event(event, pos, 0); 9481 } 9482 9483 static void 9484 hci_emit_cis_created(uint8_t cig_id, hci_con_handle_t cis_con_handle, uint8_t status) { 9485 uint8_t event [7]; 9486 uint16_t pos = 0; 9487 event[pos++] = HCI_EVENT_META_GAP; 9488 event[pos++] = 5; 9489 event[pos++] = GAP_SUBEVENT_CIS_CREATED; 9490 event[pos++] = status; 9491 event[pos++] = cig_id; 9492 little_endian_store_16(event, pos, cis_con_handle); 9493 pos += 2; 9494 hci_emit_event(event, pos, 0); 9495 } 9496 9497 static void hci_emit_big_terminated(const le_audio_big_t * big){ 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_TERMINATED; 9503 event[pos++] = big->big_handle; 9504 hci_emit_event(event, pos, 0); 9505 } 9506 9507 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status){ 9508 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9509 uint16_t pos = 0; 9510 event[pos++] = HCI_EVENT_META_GAP; 9511 event[pos++] = 4; 9512 event[pos++] = GAP_SUBEVENT_BIG_SYNC_CREATED; 9513 event[pos++] = status; 9514 event[pos++] = big_sync->big_handle; 9515 event[pos++] = big_sync->num_bis; 9516 uint8_t i; 9517 for (i=0;i<big_sync->num_bis;i++){ 9518 little_endian_store_16(event, pos, big_sync->bis_con_handles[i]); 9519 pos += 2; 9520 } 9521 hci_emit_event(event, pos, 0); 9522 } 9523 9524 static void hci_emit_big_sync_stopped(uint8_t big_handle){ 9525 uint8_t event [4]; 9526 uint16_t pos = 0; 9527 event[pos++] = HCI_EVENT_META_GAP; 9528 event[pos++] = 2; 9529 event[pos++] = GAP_SUBEVENT_BIG_SYNC_STOPPED; 9530 event[pos++] = big_handle; 9531 hci_emit_event(event, pos, 0); 9532 } 9533 9534 static void hci_emit_bis_can_send_now(const le_audio_big_t *big, uint8_t bis_index) { 9535 uint8_t event[6]; 9536 uint16_t pos = 0; 9537 event[pos++] = HCI_EVENT_BIS_CAN_SEND_NOW; 9538 event[pos++] = sizeof(event) - 2; 9539 event[pos++] = big->big_handle; 9540 event[pos++] = bis_index; 9541 little_endian_store_16(event, pos, big->bis_con_handles[bis_index]); 9542 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9543 } 9544 9545 static void hci_emit_cis_can_send_now(hci_con_handle_t cis_con_handle) { 9546 uint8_t event[4]; 9547 uint16_t pos = 0; 9548 event[pos++] = HCI_EVENT_CIS_CAN_SEND_NOW; 9549 event[pos++] = sizeof(event) - 2; 9550 little_endian_store_16(event, pos, cis_con_handle); 9551 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9552 } 9553 9554 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle){ 9555 btstack_linked_list_iterator_t it; 9556 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9557 while (btstack_linked_list_iterator_has_next(&it)){ 9558 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9559 if ( big->big_handle == big_handle ) { 9560 return big; 9561 } 9562 } 9563 return NULL; 9564 } 9565 9566 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle){ 9567 btstack_linked_list_iterator_t it; 9568 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 9569 while (btstack_linked_list_iterator_has_next(&it)){ 9570 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 9571 if ( big_sync->big_handle == big_handle ) { 9572 return big_sync; 9573 } 9574 } 9575 return NULL; 9576 } 9577 9578 void hci_set_num_iso_packets_to_queue(uint8_t num_packets){ 9579 hci_stack->iso_packets_to_queue = num_packets; 9580 } 9581 9582 static le_audio_cig_t * hci_cig_for_id(uint8_t cig_id){ 9583 btstack_linked_list_iterator_t it; 9584 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_cigs); 9585 while (btstack_linked_list_iterator_has_next(&it)){ 9586 le_audio_cig_t * cig = (le_audio_cig_t *) btstack_linked_list_iterator_next(&it); 9587 if ( cig->cig_id == cig_id ) { 9588 return cig; 9589 } 9590 } 9591 return NULL; 9592 } 9593 9594 static void hci_iso_notify_can_send_now(void){ 9595 9596 // BIG 9597 9598 btstack_linked_list_iterator_t it; 9599 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9600 while (btstack_linked_list_iterator_has_next(&it)){ 9601 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9602 // track number completed packet timestamps 9603 if (big->num_completed_timestamp_current_valid){ 9604 big->num_completed_timestamp_current_valid = false; 9605 if (big->num_completed_timestamp_previous_valid){ 9606 // detect delayed sending of all BIS: tolerate up to 50% delayed event handling 9607 uint32_t iso_interval_missed_threshold_ms = big->params->sdu_interval_us * 3 / 2000; 9608 int32_t num_completed_timestamp_delta_ms = btstack_time_delta(big->num_completed_timestamp_current_ms, 9609 big->num_completed_timestamp_previous_ms); 9610 if (num_completed_timestamp_delta_ms > iso_interval_missed_threshold_ms){ 9611 // to catch up, skip packet on all BIS 9612 uint8_t i; 9613 for (i=0;i<big->num_bis;i++){ 9614 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9615 if (iso_stream){ 9616 iso_stream->num_packets_to_skip++; 9617 } 9618 } 9619 } 9620 } 9621 big->num_completed_timestamp_previous_valid = true; 9622 big->num_completed_timestamp_previous_ms = big->num_completed_timestamp_current_ms; 9623 } 9624 9625 if (big->can_send_now_requested){ 9626 // check if no outgoing iso packets pending and no can send now have to be emitted 9627 uint8_t i; 9628 bool can_send = true; 9629 uint8_t num_iso_queued_minimum = 0; 9630 for (i=0;i<big->num_bis;i++){ 9631 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9632 if (iso_stream == NULL) continue; 9633 // handle case where individual ISO packet was sent too late: 9634 // for each additionally queued packet, a new one needs to get skipped 9635 if (i==0){ 9636 num_iso_queued_minimum = iso_stream->num_packets_sent; 9637 } else if (iso_stream->num_packets_sent > num_iso_queued_minimum){ 9638 uint8_t num_packets_to_skip = iso_stream->num_packets_sent - num_iso_queued_minimum; 9639 iso_stream->num_packets_to_skip += num_packets_to_skip; 9640 iso_stream->num_packets_sent -= num_packets_to_skip; 9641 } 9642 // check if we can send now 9643 if ((iso_stream->num_packets_sent >= hci_stack->iso_packets_to_queue) || (iso_stream->emit_ready_to_send)){ 9644 can_send = false; 9645 break; 9646 } 9647 } 9648 if (can_send){ 9649 // propagate can send now to individual streams 9650 big->can_send_now_requested = false; 9651 for (i=0;i<big->num_bis;i++){ 9652 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9653 iso_stream->emit_ready_to_send = true; 9654 } 9655 } 9656 } 9657 } 9658 9659 if (hci_stack->hci_packet_buffer_reserved) return; 9660 9661 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9662 while (btstack_linked_list_iterator_has_next(&it)){ 9663 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9664 // report bis ready 9665 uint8_t i; 9666 for (i=0;i<big->num_bis;i++){ 9667 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9668 if ((iso_stream != NULL) && iso_stream->emit_ready_to_send){ 9669 iso_stream->emit_ready_to_send = false; 9670 hci_emit_bis_can_send_now(big, i); 9671 break; 9672 } 9673 } 9674 } 9675 9676 // CIS 9677 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9678 while (btstack_linked_list_iterator_has_next(&it)) { 9679 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9680 if ((iso_stream->can_send_now_requested) && 9681 (iso_stream->num_packets_sent < hci_stack->iso_packets_to_queue)){ 9682 iso_stream->can_send_now_requested = false; 9683 hci_emit_cis_can_send_now(iso_stream->con_handle); 9684 } 9685 } 9686 } 9687 9688 uint8_t gap_big_create(le_audio_big_t * storage, le_audio_big_params_t * big_params){ 9689 if (hci_big_for_handle(big_params->big_handle) != NULL){ 9690 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9691 } 9692 if (big_params->num_bis == 0){ 9693 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9694 } 9695 if (big_params->num_bis > MAX_NR_BIS){ 9696 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9697 } 9698 9699 // reserve ISO Streams 9700 uint8_t i; 9701 uint8_t status = ERROR_CODE_SUCCESS; 9702 for (i=0;i<big_params->num_bis;i++){ 9703 status = hci_iso_stream_create(HCI_ISO_TYPE_BIS, HCI_CON_HANDLE_INVALID, big_params->big_handle, 9704 HCI_ISO_STREAM_STATE_REQUESTED); 9705 if (status != ERROR_CODE_SUCCESS) { 9706 break; 9707 } 9708 } 9709 9710 // free structs on error 9711 if (status != ERROR_CODE_SUCCESS){ 9712 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big_params->big_handle); 9713 return status; 9714 } 9715 9716 le_audio_big_t * big = storage; 9717 big->big_handle = big_params->big_handle; 9718 big->params = big_params; 9719 big->state = LE_AUDIO_BIG_STATE_CREATE; 9720 big->num_bis = big_params->num_bis; 9721 btstack_linked_list_add(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9722 9723 hci_run(); 9724 9725 return ERROR_CODE_SUCCESS; 9726 } 9727 9728 uint8_t gap_big_sync_create(le_audio_big_sync_t * storage, le_audio_big_sync_params_t * big_sync_params){ 9729 if (hci_big_sync_for_handle(big_sync_params->big_handle) != NULL){ 9730 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9731 } 9732 if (big_sync_params->num_bis == 0){ 9733 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9734 } 9735 if (big_sync_params->num_bis > MAX_NR_BIS){ 9736 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9737 } 9738 9739 le_audio_big_sync_t * big_sync = storage; 9740 big_sync->big_handle = big_sync_params->big_handle; 9741 big_sync->params = big_sync_params; 9742 big_sync->state = LE_AUDIO_BIG_STATE_CREATE; 9743 big_sync->num_bis = big_sync_params->num_bis; 9744 btstack_linked_list_add(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9745 9746 hci_run(); 9747 9748 return ERROR_CODE_SUCCESS; 9749 } 9750 9751 uint8_t gap_big_terminate(uint8_t big_handle){ 9752 le_audio_big_t * big = hci_big_for_handle(big_handle); 9753 if (big == NULL){ 9754 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9755 } 9756 switch (big->state){ 9757 case LE_AUDIO_BIG_STATE_CREATE: 9758 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9759 hci_emit_big_terminated(big); 9760 break; 9761 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9762 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9763 break; 9764 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9765 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9766 case LE_AUDIO_BIG_STATE_ACTIVE: 9767 big->state = LE_AUDIO_BIG_STATE_TERMINATE; 9768 hci_run(); 9769 break; 9770 default: 9771 return ERROR_CODE_COMMAND_DISALLOWED; 9772 } 9773 return ERROR_CODE_SUCCESS; 9774 } 9775 9776 uint8_t gap_big_sync_terminate(uint8_t big_handle){ 9777 le_audio_big_sync_t * big_sync = hci_big_sync_for_handle(big_handle); 9778 if (big_sync == NULL){ 9779 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9780 } 9781 switch (big_sync->state){ 9782 case LE_AUDIO_BIG_STATE_CREATE: 9783 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9784 hci_emit_big_sync_stopped(big_handle); 9785 break; 9786 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9787 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9788 break; 9789 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9790 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9791 case LE_AUDIO_BIG_STATE_ACTIVE: 9792 big_sync->state = LE_AUDIO_BIG_STATE_TERMINATE; 9793 hci_run(); 9794 break; 9795 default: 9796 return ERROR_CODE_COMMAND_DISALLOWED; 9797 } 9798 return ERROR_CODE_SUCCESS; 9799 } 9800 9801 uint8_t hci_request_bis_can_send_now_events(uint8_t big_handle){ 9802 le_audio_big_t * big = hci_big_for_handle(big_handle); 9803 if (big == NULL){ 9804 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9805 } 9806 if (big->state != LE_AUDIO_BIG_STATE_ACTIVE){ 9807 return ERROR_CODE_COMMAND_DISALLOWED; 9808 } 9809 big->can_send_now_requested = true; 9810 hci_iso_notify_can_send_now(); 9811 return ERROR_CODE_SUCCESS; 9812 } 9813 9814 uint8_t hci_request_cis_can_send_now_events(hci_con_handle_t cis_con_handle){ 9815 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_con_handle); 9816 if (iso_stream == NULL){ 9817 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9818 } 9819 if ((iso_stream->iso_type != HCI_ISO_TYPE_CIS) && (iso_stream->state != HCI_ISO_STREAM_STATE_ESTABLISHED)) { 9820 return ERROR_CODE_COMMAND_DISALLOWED; 9821 } 9822 iso_stream->can_send_now_requested = true; 9823 hci_iso_notify_can_send_now(); 9824 return ERROR_CODE_SUCCESS; 9825 } 9826 9827 uint8_t gap_cig_create(le_audio_cig_t * storage, le_audio_cig_params_t * cig_params){ 9828 if (hci_cig_for_id(cig_params->cig_id) != NULL){ 9829 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9830 } 9831 if (cig_params->num_cis == 0){ 9832 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9833 } 9834 if (cig_params->num_cis > MAX_NR_BIS){ 9835 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9836 } 9837 9838 // reserve ISO Streams 9839 uint8_t i; 9840 uint8_t status = ERROR_CODE_SUCCESS; 9841 for (i=0;i<cig_params->num_cis;i++){ 9842 status = hci_iso_stream_create(HCI_ISO_TYPE_CIS, HCI_CON_HANDLE_INVALID, cig_params->cig_id, 9843 HCI_ISO_STREAM_STATE_REQUESTED); 9844 if (status != ERROR_CODE_SUCCESS) { 9845 break; 9846 } 9847 } 9848 9849 // free structs on error 9850 if (status != ERROR_CODE_SUCCESS){ 9851 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_CIS, cig_params->cig_id); 9852 return status; 9853 } 9854 9855 le_audio_cig_t * cig = storage; 9856 cig->cig_id = cig_params->cig_id; 9857 cig->num_cis = cig_params->num_cis; 9858 cig->params = cig_params; 9859 cig->state = LE_AUDIO_CIG_STATE_CREATE; 9860 for (i=0;i<cig->num_cis;i++){ 9861 cig->cis_con_handles[i] = HCI_CON_HANDLE_INVALID; 9862 cig->acl_con_handles[i] = HCI_CON_HANDLE_INVALID; 9863 cig->cis_setup_active[i] = false; 9864 cig->cis_established[i] = false; 9865 } 9866 btstack_linked_list_add(&hci_stack->le_audio_cigs, (btstack_linked_item_t *) cig); 9867 9868 hci_run(); 9869 9870 return ERROR_CODE_SUCCESS; 9871 } 9872 9873 uint8_t gap_cis_create(uint8_t cig_handle, hci_con_handle_t cis_con_handles [], hci_con_handle_t acl_con_handles []){ 9874 le_audio_cig_t * cig = hci_cig_for_id(cig_handle); 9875 if (cig == NULL){ 9876 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9877 } 9878 9879 if (cig->state != LE_AUDIO_CIG_STATE_W4_CIS_REQUEST){ 9880 return ERROR_CODE_COMMAND_DISALLOWED; 9881 } 9882 9883 // store ACL Connection Handles 9884 uint8_t i; 9885 for (i=0;i<cig->num_cis;i++){ 9886 // check that all con handles exit 9887 hci_con_handle_t cis_handle = cis_con_handles[i]; 9888 uint8_t j; 9889 bool found = false; 9890 for (j=0;j<cig->num_cis;j++){ 9891 if (cig->cis_con_handles[j] == cis_handle){ 9892 cig->acl_con_handles[j] = acl_con_handles[j]; 9893 found = true; 9894 break; 9895 } 9896 } 9897 if (!found){ 9898 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9899 } 9900 } 9901 9902 cig->state = LE_AUDIO_CIG_STATE_CREATE_CIS; 9903 hci_run(); 9904 9905 return ERROR_CODE_SUCCESS; 9906 } 9907 9908 static uint8_t hci_cis_accept_or_reject(hci_con_handle_t cis_con_handle, hci_iso_stream_state_t state){ 9909 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_con_handle); 9910 if (iso_stream != NULL){ 9911 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9912 } 9913 9914 uint8_t status = hci_iso_stream_create(HCI_ISO_TYPE_CIS, cis_con_handle, 9915 HCI_ISO_GROUP_ID_INVALID, state); 9916 if (status == ERROR_CODE_SUCCESS){ 9917 return status; 9918 } 9919 9920 hci_run(); 9921 return ERROR_CODE_SUCCESS; 9922 } 9923 9924 uint8_t gap_cis_accept(hci_con_handle_t cis_con_handle){ 9925 return hci_cis_accept_or_reject(cis_con_handle, HCI_ISO_STREAM_W2_ACCEPT); 9926 } 9927 9928 uint8_t gap_cis_reject(hci_con_handle_t cis_con_handle){ 9929 return hci_cis_accept_or_reject(cis_con_handle, HCI_ISO_STREAM_W2_REJECT); 9930 } 9931 9932 9933 #endif 9934 #endif /* ENABLE_BLE */ 9935 9936 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 9937 void hci_setup_test_connections_fuzz(void){ 9938 hci_connection_t * conn; 9939 9940 // default address: 66:55:44:33:00:01 9941 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 9942 9943 // setup Controller info 9944 hci_stack->num_cmd_packets = 255; 9945 hci_stack->acl_packets_total_num = 255; 9946 9947 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 9948 addr[5] = 0x01; 9949 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9950 conn->con_handle = addr[5]; 9951 conn->role = HCI_ROLE_SLAVE; 9952 conn->state = RECEIVED_CONNECTION_REQUEST; 9953 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9954 9955 // setup incoming Classic SCO connection with con handle 0x0002 9956 addr[5] = 0x02; 9957 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9958 conn->con_handle = addr[5]; 9959 conn->role = HCI_ROLE_SLAVE; 9960 conn->state = RECEIVED_CONNECTION_REQUEST; 9961 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9962 9963 // setup ready Classic ACL connection with con handle 0x0003 9964 addr[5] = 0x03; 9965 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9966 conn->con_handle = addr[5]; 9967 conn->role = HCI_ROLE_SLAVE; 9968 conn->state = OPEN; 9969 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9970 9971 // setup ready Classic SCO connection with con handle 0x0004 9972 addr[5] = 0x04; 9973 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9974 conn->con_handle = addr[5]; 9975 conn->role = HCI_ROLE_SLAVE; 9976 conn->state = OPEN; 9977 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9978 9979 // setup ready LE ACL connection with con handle 0x005 and public address 9980 addr[5] = 0x05; 9981 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 9982 conn->con_handle = addr[5]; 9983 conn->role = HCI_ROLE_SLAVE; 9984 conn->state = OPEN; 9985 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9986 conn->sm_connection.sm_connection_encrypted = 1; 9987 } 9988 9989 void hci_free_connections_fuzz(void){ 9990 btstack_linked_list_iterator_t it; 9991 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 9992 while (btstack_linked_list_iterator_has_next(&it)){ 9993 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 9994 btstack_linked_list_iterator_remove(&it); 9995 btstack_memory_hci_connection_free(con); 9996 } 9997 } 9998 void hci_simulate_working_fuzz(void){ 9999 hci_stack->le_scanning_param_update = false; 10000 hci_init_done(); 10001 hci_stack->num_cmd_packets = 255; 10002 } 10003 #endif 10004