1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 78 #include <stdio.h> // sprintf 79 #endif 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #ifndef MAX_NR_CONTROLLER_ACL_BUFFERS 97 #define MAX_NR_CONTROLLER_ACL_BUFFERS 255 98 #endif 99 #ifndef MAX_NR_CONTROLLER_SCO_PACKETS 100 #define MAX_NR_CONTROLLER_SCO_PACKETS 255 101 #endif 102 103 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 104 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 105 #endif 106 107 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 108 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 109 #endif 110 111 #define HCI_CONNECTION_TIMEOUT_MS 10000 112 113 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 114 #define HCI_RESET_RESEND_TIMEOUT_MS 200 115 #endif 116 117 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 118 #ifndef GAP_INQUIRY_MAX_NAME_LEN 119 #define GAP_INQUIRY_MAX_NAME_LEN 32 120 #endif 121 122 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 123 #define GAP_INQUIRY_DURATION_MIN 0x01 124 #define GAP_INQUIRY_DURATION_MAX 0x30 125 #define GAP_INQUIRY_MIN_PERIODIC_LEN_MIN 0x02 126 #define GAP_INQUIRY_MAX_PERIODIC_LEN_MIN 0x03 127 #define GAP_INQUIRY_STATE_IDLE 0x00 128 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 129 #define GAP_INQUIRY_STATE_ACTIVE 0x81 130 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 131 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 132 #define GAP_INQUIRY_STATE_PERIODIC 0x84 133 #define GAP_INQUIRY_STATE_W2_EXIT_PERIODIC 0x85 134 135 // GAP Remote Name Request 136 #define GAP_REMOTE_NAME_STATE_IDLE 0 137 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 138 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 139 140 // GAP Pairing 141 #define GAP_PAIRING_STATE_IDLE 0 142 #define GAP_PAIRING_STATE_SEND_PIN 1 143 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 144 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 145 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 146 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 147 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 148 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 149 150 // 151 // compact storage of relevant supported HCI Commands. 152 // X-Macro below provides enumeration and mapping table into the supported 153 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 154 // 155 156 // format: command name, byte offset, bit nr in 64-byte supported commands 157 // currently stored in 32-bit variable 158 #define SUPPORTED_HCI_COMMANDS \ 159 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 160 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 161 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 162 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 163 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 164 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 165 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 166 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 167 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 168 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 169 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 170 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 171 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 172 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 173 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 174 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 175 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 176 177 // enumerate supported commands 178 #define X(name, offset, bit) name, 179 enum { 180 SUPPORTED_HCI_COMMANDS 181 SUPPORTED_HCI_COMMANDS_COUNT 182 }; 183 #undef X 184 185 // prototypes 186 #ifdef ENABLE_CLASSIC 187 static void hci_update_scan_enable(void); 188 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable); 189 static int hci_local_ssp_activated(void); 190 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 191 static bool hci_ssp_supported(hci_connection_t * connection); 192 static void hci_notify_if_sco_can_send_now(void); 193 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 194 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 195 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 196 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 197 static void hci_connection_timestamp(hci_connection_t *connection); 198 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 199 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 200 #endif 201 202 static int hci_power_control_on(void); 203 static void hci_power_control_off(void); 204 static void hci_state_reset(void); 205 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 206 static void hci_emit_transport_packet_sent(void); 207 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 208 static void hci_emit_nr_connections_changed(void); 209 static void hci_emit_hci_open_failed(void); 210 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 211 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 212 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 213 static void hci_run(void); 214 static int hci_is_le_connection(hci_connection_t * connection); 215 216 #ifdef ENABLE_CLASSIC 217 static int hci_have_usb_transport(void); 218 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 219 #endif 220 221 #ifdef ENABLE_BLE 222 static void hci_whitelist_free(void); 223 #ifdef ENABLE_LE_CENTRAL 224 // called from test/ble_client/advertising_data_parser.c 225 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 226 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 227 static hci_connection_t * gap_get_outgoing_connection(void); 228 static void hci_le_scan_stop(void); 229 static bool hci_run_general_gap_le(void); 230 #endif 231 #ifdef ENABLE_LE_PERIPHERAL 232 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 233 static void hci_periodic_advertiser_list_free(void); 234 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 235 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 236 #endif /* ENABLE_LE_PERIPHERAL */ 237 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 238 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id, 239 hci_iso_stream_state_t state); 240 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream); 241 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id); 242 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle); 243 static void hci_iso_stream_requested_finalize(uint8_t big_handle); 244 static void hci_iso_stream_requested_confirm(uint8_t big_handle); 245 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size); 246 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle); 247 static le_audio_cig_t * hci_cig_for_id(uint8_t cig_id); 248 static void hci_iso_notify_can_send_now(void); 249 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status); 250 static void hci_emit_big_terminated(const le_audio_big_t * big); 251 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status); 252 static void hci_emit_big_sync_stopped(uint8_t big_handle); 253 static void hci_emit_cig_created(const le_audio_cig_t * cig, uint8_t status); 254 static void 255 hci_emit_cis_created(uint8_t cig_id, hci_con_handle_t cis_con_handle, uint8_t status); 256 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle); 257 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 258 #endif /* ENABLE_BLE */ 259 260 // the STACK is here 261 #ifndef HAVE_MALLOC 262 static hci_stack_t hci_stack_static; 263 #endif 264 static hci_stack_t * hci_stack = NULL; 265 266 #ifdef ENABLE_CLASSIC 267 // default name 268 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 269 270 // test helper 271 static uint8_t disable_l2cap_timeouts = 0; 272 #endif 273 274 // reset connection state on create and on reconnect 275 // don't overwrite addr, con handle, role 276 static void hci_connection_init(hci_connection_t * conn){ 277 conn->authentication_flags = AUTH_FLAG_NONE; 278 conn->bonding_flags = 0; 279 conn->requested_security_level = LEVEL_0; 280 #ifdef ENABLE_CLASSIC 281 conn->request_role = HCI_ROLE_INVALID; 282 conn->sniff_subrating_max_latency = 0xffff; 283 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 284 conn->link_key_type = INVALID_LINK_KEY; 285 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 286 btstack_run_loop_set_timer_context(&conn->timeout, conn); 287 hci_connection_timestamp(conn); 288 #endif 289 conn->acl_recombination_length = 0; 290 conn->acl_recombination_pos = 0; 291 conn->num_packets_sent = 0; 292 293 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 294 #ifdef ENABLE_BLE 295 conn->le_phy_update_all_phys = 0xff; 296 #endif 297 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 298 conn->le_max_tx_octets = 27; 299 #endif 300 #ifdef ENABLE_CLASSIC_PAIRING_OOB 301 conn->classic_oob_c_192 = NULL; 302 conn->classic_oob_r_192 = NULL; 303 conn->classic_oob_c_256 = NULL; 304 conn->classic_oob_r_256 = NULL; 305 #endif 306 } 307 308 /** 309 * create connection for given address 310 * 311 * @return connection OR NULL, if no memory left 312 */ 313 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 314 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 315 316 hci_connection_t * conn = btstack_memory_hci_connection_get(); 317 if (!conn) return NULL; 318 hci_connection_init(conn); 319 320 bd_addr_copy(conn->address, addr); 321 conn->address_type = addr_type; 322 conn->con_handle = HCI_CON_HANDLE_INVALID; 323 conn->role = HCI_ROLE_INVALID; 324 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 325 conn->le_past_sync_handle = HCI_CON_HANDLE_INVALID; 326 #endif 327 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 328 329 return conn; 330 } 331 332 333 /** 334 * get le connection parameter range 335 * 336 * @return le connection parameter range struct 337 */ 338 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 339 *range = hci_stack->le_connection_parameter_range; 340 } 341 342 /** 343 * set le connection parameter range 344 * 345 */ 346 347 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 348 hci_stack->le_connection_parameter_range = *range; 349 } 350 351 /** 352 * @brief Test if connection parameters are inside in existing rage 353 * @param conn_interval_min (unit: 1.25ms) 354 * @param conn_interval_max (unit: 1.25ms) 355 * @param conn_latency 356 * @param supervision_timeout (unit: 10ms) 357 * @return 1 if included 358 */ 359 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){ 360 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 361 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 362 363 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 364 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 365 366 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 367 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 368 369 return 1; 370 } 371 372 /** 373 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 374 * @note: default: 1 375 * @param max_peripheral_connections 376 */ 377 #ifdef ENABLE_LE_PERIPHERAL 378 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 379 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 380 } 381 #endif 382 383 /** 384 * get hci connections iterator 385 * 386 * @return hci connections iterator 387 */ 388 389 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 390 btstack_linked_list_iterator_init(it, &hci_stack->connections); 391 } 392 393 /** 394 * get connection for a given handle 395 * 396 * @return connection OR NULL, if not found 397 */ 398 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 399 btstack_linked_list_iterator_t it; 400 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 401 while (btstack_linked_list_iterator_has_next(&it)){ 402 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 403 if ( item->con_handle == con_handle ) { 404 return item; 405 } 406 } 407 return NULL; 408 } 409 410 /** 411 * get connection for given address 412 * 413 * @return connection OR NULL, if not found 414 */ 415 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 416 btstack_linked_list_iterator_t it; 417 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 418 while (btstack_linked_list_iterator_has_next(&it)){ 419 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 420 if (connection->address_type != addr_type) continue; 421 if (memcmp(addr, connection->address, 6) != 0) continue; 422 return connection; 423 } 424 return NULL; 425 } 426 427 #ifdef ENABLE_CLASSIC 428 429 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 430 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 431 } 432 433 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 434 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 435 } 436 437 #ifdef ENABLE_SCO_OVER_HCI 438 static int hci_number_sco_connections(void){ 439 int connections = 0; 440 btstack_linked_list_iterator_t it; 441 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 442 while (btstack_linked_list_iterator_has_next(&it)){ 443 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 444 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 445 connections++; 446 } 447 return connections; 448 } 449 #endif 450 451 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 452 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 453 #ifdef HAVE_EMBEDDED_TICK 454 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 455 // connections might be timed out 456 hci_emit_l2cap_check_timeout(connection); 457 } 458 #else 459 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 460 // connections might be timed out 461 hci_emit_l2cap_check_timeout(connection); 462 } 463 #endif 464 } 465 466 static void hci_connection_timestamp(hci_connection_t *connection){ 467 #ifdef HAVE_EMBEDDED_TICK 468 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 469 #else 470 connection->timestamp = btstack_run_loop_get_time_ms(); 471 #endif 472 } 473 474 /** 475 * add authentication flags and reset timer 476 * @note: assumes classic connection 477 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 478 */ 479 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 480 bd_addr_t addr; 481 reverse_bd_addr(bd_addr, addr); 482 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 483 if (conn) { 484 connectionSetAuthenticationFlags(conn, flags); 485 hci_connection_timestamp(conn); 486 } 487 } 488 489 static bool hci_pairing_active(hci_connection_t * hci_connection){ 490 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 491 } 492 493 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 494 if (hci_pairing_active(hci_connection)) return; 495 if (ssp){ 496 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 497 } else { 498 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 499 } 500 // if we are initiator, we have sent an HCI Authenticate Request 501 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 502 503 // if we are responder, use minimal service security level as required level 504 if (!initiator){ 505 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); 506 } 507 508 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 509 510 uint8_t event[12]; 511 event[0] = GAP_EVENT_PAIRING_STARTED; 512 event[1] = 10; 513 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 514 reverse_bd_addr(hci_connection->address, &event[4]); 515 event[10] = (uint8_t) ssp; 516 event[11] = (uint8_t) initiator; 517 hci_emit_event(event, sizeof(event), 1); 518 } 519 520 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 521 hci_connection->requested_security_level = LEVEL_0; 522 if (!hci_pairing_active(hci_connection)) return; 523 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 524 #ifdef ENABLE_CLASSIC_PAIRING_OOB 525 hci_connection->classic_oob_c_192 = NULL; 526 hci_connection->classic_oob_r_192 = NULL; 527 hci_connection->classic_oob_c_256 = NULL; 528 hci_connection->classic_oob_r_256 = NULL; 529 #endif 530 log_info("pairing complete, status %02x", status); 531 532 uint8_t event[11]; 533 event[0] = GAP_EVENT_PAIRING_COMPLETE; 534 event[1] = 9; 535 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 536 reverse_bd_addr(hci_connection->address, &event[4]); 537 event[10] = status; 538 hci_emit_event(event, sizeof(event), 1); 539 540 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 541 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 542 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 543 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 544 hci_connection->bonding_status = status; 545 } 546 } 547 548 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 549 hci_connection_t * conn = hci_connection_for_handle(handle); 550 if (!conn) return false; 551 return hci_pairing_active(conn); 552 } 553 554 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 555 if (!hci_stack->link_key_db) return; 556 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 557 hci_stack->link_key_db->delete_link_key(addr); 558 } 559 560 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 561 if (!hci_stack->link_key_db) return; 562 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 563 hci_stack->link_key_db->put_link_key(addr, link_key, type); 564 } 565 566 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 567 if (!hci_stack->link_key_db) return false; 568 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 569 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 570 return result; 571 } 572 573 void gap_delete_all_link_keys(void){ 574 bd_addr_t addr; 575 link_key_t link_key; 576 link_key_type_t type; 577 btstack_link_key_iterator_t it; 578 int ok = gap_link_key_iterator_init(&it); 579 if (!ok) { 580 log_error("could not initialize iterator"); 581 return; 582 } 583 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 584 gap_drop_link_key_for_bd_addr(addr); 585 } 586 gap_link_key_iterator_done(&it); 587 } 588 589 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 590 if (!hci_stack->link_key_db) return 0; 591 if (!hci_stack->link_key_db->iterator_init) return 0; 592 return hci_stack->link_key_db->iterator_init(it); 593 } 594 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){ 595 if (!hci_stack->link_key_db) return 0; 596 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 597 } 598 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 599 if (!hci_stack->link_key_db) return; 600 hci_stack->link_key_db->iterator_done(it); 601 } 602 #endif 603 604 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 605 switch (address_type){ 606 case BD_ADDR_TYPE_LE_PUBLIC: 607 case BD_ADDR_TYPE_LE_RANDOM: 608 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 609 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 610 return true; 611 default: 612 return false; 613 } 614 } 615 616 static int hci_is_le_connection(hci_connection_t * connection){ 617 return hci_is_le_connection_type(connection->address_type); 618 } 619 620 /** 621 * count connections 622 */ 623 static int nr_hci_connections(void){ 624 int count = 0; 625 btstack_linked_item_t *it; 626 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 627 count++; 628 } 629 return count; 630 } 631 632 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 633 634 unsigned int num_packets_sent_classic = 0; 635 unsigned int num_packets_sent_le = 0; 636 637 btstack_linked_item_t *it; 638 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 639 hci_connection_t * connection = (hci_connection_t *) it; 640 if (hci_is_le_connection(connection)){ 641 num_packets_sent_le += connection->num_packets_sent; 642 } 643 if (connection->address_type == BD_ADDR_TYPE_ACL){ 644 num_packets_sent_classic += connection->num_packets_sent; 645 } 646 } 647 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 648 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 649 int free_slots_le = 0; 650 651 if (free_slots_classic < 0){ 652 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); 653 return 0; 654 } 655 656 if (hci_stack->le_acl_packets_total_num){ 657 // if we have LE slots, they are used 658 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 659 if (free_slots_le < 0){ 660 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); 661 return 0; 662 } 663 } else { 664 // otherwise, classic slots are used for LE, too 665 free_slots_classic -= num_packets_sent_le; 666 if (free_slots_classic < 0){ 667 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); 668 return 0; 669 } 670 } 671 672 switch (address_type){ 673 case BD_ADDR_TYPE_UNKNOWN: 674 log_error("hci_number_free_acl_slots: unknown address type"); 675 return 0; 676 677 case BD_ADDR_TYPE_ACL: 678 return (uint16_t) free_slots_classic; 679 680 default: 681 if (hci_stack->le_acl_packets_total_num > 0){ 682 return (uint16_t) free_slots_le; 683 } 684 return (uint16_t) free_slots_classic; 685 } 686 } 687 688 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 689 // get connection type 690 hci_connection_t * connection = hci_connection_for_handle(con_handle); 691 if (!connection){ 692 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 693 return 0; 694 } 695 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 696 } 697 698 #ifdef ENABLE_CLASSIC 699 static int hci_number_free_sco_slots(void){ 700 unsigned int num_sco_packets_sent = 0; 701 btstack_linked_item_t *it; 702 if (hci_stack->synchronous_flow_control_enabled){ 703 // explicit flow control 704 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 705 hci_connection_t * connection = (hci_connection_t *) it; 706 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 707 num_sco_packets_sent += connection->num_packets_sent; 708 } 709 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 710 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 711 return 0; 712 } 713 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 714 } else { 715 // implicit flow control -- TODO 716 int num_ready = 0; 717 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 718 hci_connection_t * connection = (hci_connection_t *) it; 719 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 720 if (connection->sco_tx_ready == 0) continue; 721 num_ready++; 722 } 723 return num_ready; 724 } 725 } 726 #endif 727 728 // only used to send HCI Host Number Completed Packets 729 static int hci_can_send_comand_packet_transport(void){ 730 if (hci_stack->hci_packet_buffer_reserved) return 0; 731 732 // check for async hci transport implementations 733 if (hci_stack->hci_transport->can_send_packet_now){ 734 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 735 return 0; 736 } 737 } 738 return 1; 739 } 740 741 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 742 bool hci_can_send_command_packet_now(void){ 743 if (hci_can_send_comand_packet_transport() == 0) return false; 744 return hci_stack->num_cmd_packets > 0u; 745 } 746 747 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 748 // check for async hci transport implementations 749 if (!hci_stack->hci_transport->can_send_packet_now) return true; 750 return hci_stack->hci_transport->can_send_packet_now(packet_type); 751 } 752 753 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 754 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 755 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 756 } 757 758 bool hci_can_send_acl_le_packet_now(void){ 759 if (hci_stack->hci_packet_buffer_reserved) return false; 760 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 761 } 762 763 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 764 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 765 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 766 } 767 768 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 769 if (hci_stack->hci_packet_buffer_reserved) return false; 770 return hci_can_send_prepared_acl_packet_now(con_handle); 771 } 772 773 #ifdef ENABLE_CLASSIC 774 bool hci_can_send_acl_classic_packet_now(void){ 775 if (hci_stack->hci_packet_buffer_reserved) return false; 776 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 777 } 778 779 bool hci_can_send_prepared_sco_packet_now(void){ 780 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 781 if (hci_have_usb_transport()){ 782 return hci_stack->sco_can_send_now; 783 } else { 784 return hci_number_free_sco_slots() > 0; 785 } 786 } 787 788 bool hci_can_send_sco_packet_now(void){ 789 if (hci_stack->hci_packet_buffer_reserved) return false; 790 return hci_can_send_prepared_sco_packet_now(); 791 } 792 793 void hci_request_sco_can_send_now_event(void){ 794 hci_stack->sco_waiting_for_can_send_now = 1; 795 hci_notify_if_sco_can_send_now(); 796 } 797 #endif 798 799 // used for internal checks in l2cap.c 800 bool hci_is_packet_buffer_reserved(void){ 801 return hci_stack->hci_packet_buffer_reserved; 802 } 803 804 // reserves outgoing packet buffer. 805 // @return 1 if successful 806 bool hci_reserve_packet_buffer(void){ 807 if (hci_stack->hci_packet_buffer_reserved) { 808 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 809 return false; 810 } 811 hci_stack->hci_packet_buffer_reserved = true; 812 return true; 813 } 814 815 void hci_release_packet_buffer(void){ 816 hci_stack->hci_packet_buffer_reserved = false; 817 } 818 819 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 820 static int hci_transport_synchronous(void){ 821 return hci_stack->hci_transport->can_send_packet_now == NULL; 822 } 823 824 // used for debugging 825 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 826 static void hci_controller_dump_packets(void){ 827 // format: "{handle:04x}:{count:02d} " 828 char summaries[3][7 * 8 + 1]; 829 uint16_t totals[3]; 830 uint8_t index; 831 for (index = 0 ; index < 3 ; index++){ 832 summaries[index][0] = 0; 833 totals[index] = 0; 834 } 835 btstack_linked_item_t *it; 836 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 837 hci_connection_t * connection = (hci_connection_t *) it; 838 switch (connection->address_type){ 839 case BD_ADDR_TYPE_ACL: 840 index = 0; 841 break; 842 case BD_ADDR_TYPE_SCO: 843 index = 2; 844 break; 845 default: 846 index = 1; 847 break; 848 } 849 totals[index] += connection->num_packets_sent; 850 char item_text[10]; 851 sprintf(item_text, "%04x:%02d ", connection->con_handle,connection->num_packets_sent); 852 btstack_strcat(summaries[index], sizeof(summaries[0]), item_text); 853 } 854 for (index = 0 ; index < 3 ; index++){ 855 if (summaries[index][0] == 0){ 856 summaries[index][0] = '-'; 857 summaries[index][1] = 0; 858 } 859 } 860 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]); 861 } 862 #endif 863 864 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 865 866 // 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); 867 868 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 869 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 870 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 871 max_acl_data_packet_length = hci_stack->le_data_packets_length; 872 } 873 874 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 875 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 876 max_acl_data_packet_length = connection->le_max_tx_octets; 877 } 878 #endif 879 880 log_debug("hci_send_acl_packet_fragments entered"); 881 882 uint8_t status = ERROR_CODE_SUCCESS; 883 // multiple packets could be send on a synchronous HCI transport 884 while (true){ 885 886 log_debug("hci_send_acl_packet_fragments loop entered"); 887 888 // get current data 889 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 890 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 891 bool more_fragments = false; 892 893 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 894 if (current_acl_data_packet_length > max_acl_data_packet_length){ 895 more_fragments = true; 896 current_acl_data_packet_length = max_acl_data_packet_length; 897 } 898 899 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 900 if (acl_header_pos > 0u){ 901 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 902 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 903 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 904 } 905 906 // update header len 907 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 908 909 // count packet 910 connection->num_packets_sent++; 911 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 912 913 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 914 if (more_fragments){ 915 // update start of next fragment to send 916 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 917 } else { 918 // done 919 hci_stack->acl_fragmentation_pos = 0; 920 hci_stack->acl_fragmentation_total_size = 0; 921 } 922 923 // send packet 924 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 925 const int size = current_acl_data_packet_length + 4; 926 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 927 hci_stack->acl_fragmentation_tx_active = 1; 928 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 929 if (err != 0){ 930 // no error from HCI Transport expected 931 status = ERROR_CODE_HARDWARE_FAILURE; 932 } 933 934 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 935 hci_controller_dump_packets(); 936 #endif 937 938 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 939 940 // done yet? 941 if (!more_fragments) break; 942 943 // can send more? 944 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 945 } 946 947 log_debug("hci_send_acl_packet_fragments loop over"); 948 949 // release buffer now for synchronous transport 950 if (hci_transport_synchronous()){ 951 hci_stack->acl_fragmentation_tx_active = 0; 952 hci_release_packet_buffer(); 953 hci_emit_transport_packet_sent(); 954 } 955 956 return status; 957 } 958 959 // pre: caller has reserved the packet buffer 960 uint8_t hci_send_acl_packet_buffer(int size){ 961 btstack_assert(hci_stack->hci_packet_buffer_reserved); 962 963 uint8_t * packet = hci_stack->hci_packet_buffer; 964 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 965 966 // check for free places on Bluetooth module 967 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 968 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 969 hci_release_packet_buffer(); 970 hci_emit_transport_packet_sent(); 971 return BTSTACK_ACL_BUFFERS_FULL; 972 } 973 974 hci_connection_t *connection = hci_connection_for_handle( con_handle); 975 if (!connection) { 976 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 977 hci_release_packet_buffer(); 978 hci_emit_transport_packet_sent(); 979 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 980 } 981 982 #ifdef ENABLE_CLASSIC 983 hci_connection_timestamp(connection); 984 #endif 985 986 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 987 988 // setup data 989 hci_stack->acl_fragmentation_total_size = size; 990 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 991 992 return hci_send_acl_packet_fragments(connection); 993 } 994 995 #ifdef ENABLE_CLASSIC 996 // pre: caller has reserved the packet buffer 997 uint8_t hci_send_sco_packet_buffer(int size){ 998 btstack_assert(hci_stack->hci_packet_buffer_reserved); 999 1000 uint8_t * packet = hci_stack->hci_packet_buffer; 1001 1002 // skip checks in loopback mode 1003 if (!hci_stack->loopback_mode){ 1004 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 1005 1006 // check for free places on Bluetooth module 1007 if (!hci_can_send_prepared_sco_packet_now()) { 1008 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 1009 hci_release_packet_buffer(); 1010 hci_emit_transport_packet_sent(); 1011 return BTSTACK_ACL_BUFFERS_FULL; 1012 } 1013 1014 // track send packet in connection struct 1015 hci_connection_t *connection = hci_connection_for_handle( con_handle); 1016 if (!connection) { 1017 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 1018 hci_release_packet_buffer(); 1019 hci_emit_transport_packet_sent(); 1020 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1021 } 1022 1023 if (hci_have_usb_transport()){ 1024 // token used 1025 hci_stack->sco_can_send_now = false; 1026 } else { 1027 if (hci_stack->synchronous_flow_control_enabled){ 1028 connection->num_packets_sent++; 1029 } else { 1030 connection->sco_tx_ready--; 1031 } 1032 } 1033 } 1034 1035 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 1036 1037 #ifdef HAVE_SCO_TRANSPORT 1038 hci_stack->sco_transport->send_packet(packet, size); 1039 hci_release_packet_buffer(); 1040 hci_emit_transport_packet_sent(); 1041 1042 return 0; 1043 #else 1044 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 1045 if (hci_transport_synchronous()){ 1046 hci_release_packet_buffer(); 1047 hci_emit_transport_packet_sent(); 1048 } 1049 1050 if (err != 0){ 1051 return ERROR_CODE_HARDWARE_FAILURE; 1052 } 1053 return ERROR_CODE_SUCCESS; 1054 #endif 1055 } 1056 #endif 1057 1058 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 1059 static uint8_t hci_send_iso_packet_fragments(void){ 1060 1061 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 1062 uint8_t status = ERROR_CODE_SUCCESS; 1063 // multiple packets could be send on a synchronous HCI transport 1064 while (true){ 1065 1066 // get current data 1067 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 1068 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 1069 bool more_fragments = false; 1070 1071 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 1072 if (current_iso_data_packet_length > max_iso_data_packet_length){ 1073 more_fragments = true; 1074 current_iso_data_packet_length = max_iso_data_packet_length; 1075 } 1076 1077 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1078 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1079 uint8_t pb_flags; 1080 if (iso_header_pos == 0u){ 1081 // first fragment, keep TS field 1082 pb_flags = more_fragments ? 0x00 : 0x02; 1083 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1084 } else { 1085 // later fragment, drop TS field 1086 pb_flags = more_fragments ? 0x01 : 0x03; 1087 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1088 } 1089 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1090 1091 // update header len 1092 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1093 1094 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1095 if (more_fragments){ 1096 // update start of next fragment to send 1097 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1098 } else { 1099 // done 1100 hci_stack->iso_fragmentation_pos = 0; 1101 hci_stack->iso_fragmentation_total_size = 0; 1102 } 1103 1104 // send packet 1105 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1106 const int size = current_iso_data_packet_length + 4; 1107 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1108 hci_stack->iso_fragmentation_tx_active = true; 1109 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1110 if (err != 0){ 1111 // no error from HCI Transport expected 1112 status = ERROR_CODE_HARDWARE_FAILURE; 1113 } 1114 1115 // done yet? 1116 if (!more_fragments) break; 1117 1118 // can send more? 1119 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1120 } 1121 1122 // release buffer now for synchronous transport 1123 if (hci_transport_synchronous()){ 1124 hci_stack->iso_fragmentation_tx_active = false; 1125 hci_release_packet_buffer(); 1126 hci_emit_transport_packet_sent(); 1127 } 1128 1129 return status; 1130 } 1131 1132 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1133 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1134 1135 hci_con_handle_t con_handle = (hci_con_handle_t) little_endian_read_16(hci_stack->hci_packet_buffer, 0) & 0xfff; 1136 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(con_handle); 1137 if (iso_stream == NULL){ 1138 hci_release_packet_buffer(); 1139 hci_iso_notify_can_send_now(); 1140 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1141 } 1142 1143 // TODO: check for space on controller 1144 1145 // skip iso packets if needed 1146 if (iso_stream->num_packets_to_skip > 0){ 1147 iso_stream->num_packets_to_skip--; 1148 // pretend it was processed and trigger next one 1149 hci_release_packet_buffer(); 1150 hci_iso_notify_can_send_now(); 1151 return ERROR_CODE_SUCCESS; 1152 } 1153 1154 // track outgoing packet sent 1155 log_info("Outgoing ISO packet for con handle 0x%04x", con_handle); 1156 iso_stream->num_packets_sent++; 1157 1158 // setup data 1159 hci_stack->iso_fragmentation_total_size = size; 1160 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1161 1162 return hci_send_iso_packet_fragments(); 1163 } 1164 #endif 1165 1166 static void acl_handler(uint8_t *packet, uint16_t size){ 1167 1168 // get info 1169 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1170 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1171 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1172 uint16_t acl_length = READ_ACL_LENGTH(packet); 1173 1174 // ignore non-registered handle 1175 if (!conn){ 1176 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1177 return; 1178 } 1179 1180 // assert packet is complete 1181 if ((acl_length + 4u) != size){ 1182 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1183 return; 1184 } 1185 1186 #ifdef ENABLE_CLASSIC 1187 // update idle timestamp 1188 hci_connection_timestamp(conn); 1189 #endif 1190 1191 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1192 hci_stack->host_completed_packets = 1; 1193 conn->num_packets_completed++; 1194 #endif 1195 1196 // handle different packet types 1197 switch (acl_flags & 0x03u) { 1198 1199 case 0x01: // continuation fragment 1200 1201 // sanity checks 1202 if (conn->acl_recombination_pos == 0u) { 1203 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1204 return; 1205 } 1206 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1207 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1208 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1209 conn->acl_recombination_pos = 0; 1210 return; 1211 } 1212 1213 // append fragment payload (header already stored) 1214 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1215 &packet[4], acl_length); 1216 conn->acl_recombination_pos += acl_length; 1217 1218 // forward complete L2CAP packet if complete. 1219 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1220 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1221 // reset recombination buffer 1222 conn->acl_recombination_length = 0; 1223 conn->acl_recombination_pos = 0; 1224 } 1225 break; 1226 1227 case 0x02: { // first fragment 1228 1229 // sanity check 1230 if (conn->acl_recombination_pos) { 1231 // we just received the first fragment, but still have data. Only warn if the packet wasn't a flushable packet 1232 if ((conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE+1] >> 4) != 0x02){ 1233 log_error( "ACL First Fragment but %u bytes in buffer for handle 0x%02x, dropping stale fragments", conn->acl_recombination_pos, con_handle); 1234 } 1235 conn->acl_recombination_pos = 0; 1236 } 1237 1238 // peek into L2CAP packet! 1239 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1240 1241 // compare fragment size to L2CAP packet size 1242 if (acl_length >= (l2cap_length + 4u)){ 1243 // forward fragment as L2CAP packet 1244 hci_emit_acl_packet(packet, acl_length + 4u); 1245 } else { 1246 1247 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1248 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1249 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1250 return; 1251 } 1252 1253 // store first fragment and tweak acl length for complete package 1254 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1255 packet, acl_length + 4u); 1256 conn->acl_recombination_pos = acl_length + 4u; 1257 conn->acl_recombination_length = l2cap_length; 1258 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1259 } 1260 break; 1261 1262 } 1263 default: 1264 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1265 return; 1266 } 1267 1268 // execute main loop 1269 hci_run(); 1270 } 1271 1272 static void hci_connection_stop_timer(hci_connection_t * conn){ 1273 btstack_run_loop_remove_timer(&conn->timeout); 1274 #ifdef ENABLE_CLASSIC 1275 btstack_run_loop_remove_timer(&conn->timeout_sco); 1276 #endif 1277 } 1278 1279 static void hci_shutdown_connection(hci_connection_t *conn){ 1280 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1281 1282 #ifdef ENABLE_CLASSIC 1283 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1284 bd_addr_type_t addr_type = conn->address_type; 1285 #endif 1286 #ifdef HAVE_SCO_TRANSPORT 1287 hci_con_handle_t con_handle = conn->con_handle; 1288 #endif 1289 #endif 1290 1291 hci_connection_stop_timer(conn); 1292 1293 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1294 btstack_memory_hci_connection_free( conn ); 1295 1296 // now it's gone 1297 hci_emit_nr_connections_changed(); 1298 1299 #ifdef ENABLE_CLASSIC 1300 #ifdef ENABLE_SCO_OVER_HCI 1301 // update SCO 1302 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1303 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1304 } 1305 #endif 1306 #ifdef HAVE_SCO_TRANSPORT 1307 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1308 hci_stack->sco_transport->close(con_handle); 1309 } 1310 #endif 1311 #endif 1312 } 1313 1314 #ifdef ENABLE_CLASSIC 1315 1316 static const uint16_t packet_type_sizes[] = { 1317 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1318 HCI_ACL_DH1_SIZE, 0, 0, 0, 1319 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1320 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1321 }; 1322 static const uint8_t packet_type_feature_requirement_bit[] = { 1323 0, // 3 slot packets 1324 1, // 5 slot packets 1325 25, // EDR 2 mpbs 1326 26, // EDR 3 mbps 1327 39, // 3 slot EDR packts 1328 40, // 5 slot EDR packet 1329 }; 1330 static const uint16_t packet_type_feature_packet_mask[] = { 1331 0x0f00, // 3 slot packets 1332 0xf000, // 5 slot packets 1333 0x1102, // EDR 2 mpbs 1334 0x2204, // EDR 3 mbps 1335 0x0300, // 3 slot EDR packts 1336 0x3000, // 5 slot EDR packet 1337 }; 1338 1339 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1340 // enable packet types based on size 1341 uint16_t packet_types = 0; 1342 unsigned int i; 1343 for (i=0;i<16;i++){ 1344 if (packet_type_sizes[i] == 0) continue; 1345 if (packet_type_sizes[i] <= buffer_size){ 1346 packet_types |= 1 << i; 1347 } 1348 } 1349 // disable packet types due to missing local supported features 1350 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1351 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1352 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1353 if (feature_set) continue; 1354 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1355 packet_types &= ~packet_type_feature_packet_mask[i]; 1356 } 1357 // flip bits for "may not be used" 1358 packet_types ^= 0x3306; 1359 return packet_types; 1360 } 1361 1362 uint16_t hci_usable_acl_packet_types(void){ 1363 return hci_stack->packet_types; 1364 } 1365 #endif 1366 1367 uint8_t* hci_get_outgoing_packet_buffer(void){ 1368 // hci packet buffer is >= acl data packet length 1369 return hci_stack->hci_packet_buffer; 1370 } 1371 1372 uint16_t hci_max_acl_data_packet_length(void){ 1373 return hci_stack->acl_data_packet_length; 1374 } 1375 1376 #ifdef ENABLE_CLASSIC 1377 bool hci_extended_sco_link_supported(void){ 1378 // No. 31, byte 3, bit 7 1379 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1380 } 1381 #endif 1382 1383 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1384 // No. 54, byte 6, bit 6 1385 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1386 } 1387 1388 #ifdef ENABLE_CLASSIC 1389 static int gap_ssp_supported(void){ 1390 // No. 51, byte 6, bit 3 1391 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1392 } 1393 #endif 1394 1395 static int hci_classic_supported(void){ 1396 #ifdef ENABLE_CLASSIC 1397 // No. 37, byte 4, bit 5, = No BR/EDR Support 1398 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1399 #else 1400 return 0; 1401 #endif 1402 } 1403 1404 static int hci_le_supported(void){ 1405 #ifdef ENABLE_BLE 1406 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1407 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1408 #else 1409 return 0; 1410 #endif 1411 } 1412 1413 static bool hci_command_supported(uint8_t command_index){ 1414 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1415 } 1416 1417 #ifdef ENABLE_BLE 1418 1419 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1420 static bool hci_extended_advertising_supported(void){ 1421 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1422 } 1423 #endif 1424 1425 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1426 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1427 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1428 } else { 1429 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1430 } 1431 } 1432 1433 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1434 *addr_type = hci_stack->le_own_addr_type; 1435 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1436 } 1437 1438 #ifdef ENABLE_LE_PERIPHERAL 1439 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1440 *addr_type = hci_stack->le_advertisements_own_addr_type; 1441 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1442 }; 1443 #endif 1444 1445 #ifdef ENABLE_LE_CENTRAL 1446 1447 /** 1448 * @brief Get own addr type and address used for LE connections (Central) 1449 */ 1450 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1451 *addr_type = hci_stack->le_connection_own_addr_type; 1452 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1453 } 1454 1455 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1456 1457 uint16_t offset = 3; 1458 uint8_t num_reports = packet[offset]; 1459 offset += 1; 1460 1461 uint16_t i; 1462 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1463 for (i=0; (i<num_reports) && (offset < size);i++){ 1464 // sanity checks on data_length: 1465 uint8_t data_length = packet[offset + 8]; 1466 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1467 if ((offset + 9u + data_length + 1u) > size) return; 1468 // setup event 1469 uint8_t event_size = 10u + data_length; 1470 uint16_t pos = 0; 1471 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1472 event[pos++] = event_size; 1473 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1474 offset += 8; 1475 pos += 8; 1476 event[pos++] = packet[offset + 1 + data_length]; // rssi 1477 event[pos++] = data_length; 1478 offset++; 1479 (void)memcpy(&event[pos], &packet[offset], data_length); 1480 pos += data_length; 1481 offset += data_length + 1u; // rssi 1482 hci_emit_event(event, pos, 1); 1483 } 1484 } 1485 1486 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1487 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1488 uint16_t offset = 3; 1489 uint8_t num_reports = packet[offset++]; 1490 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1491 uint8_t i; 1492 for (i=0; (i<num_reports) && (offset < size);i++){ 1493 // sanity checks on data_length: 1494 uint16_t data_length = packet[offset + 23]; 1495 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1496 if ((offset + 24u + data_length) > size) return; 1497 uint16_t event_type = little_endian_read_16(packet, offset); 1498 offset += 2; 1499 if ((event_type & 0x10) != 0) { 1500 // setup legacy event 1501 uint8_t legacy_event_type; 1502 switch (event_type){ 1503 case 0b0010011: 1504 // ADV_IND 1505 legacy_event_type = 0; 1506 break; 1507 case 0b0010101: 1508 // ADV_DIRECT_IND 1509 legacy_event_type = 1; 1510 break; 1511 case 0b0010010: 1512 // ADV_SCAN_IND 1513 legacy_event_type = 2; 1514 break; 1515 case 0b0010000: 1516 // ADV_NONCONN_IND 1517 legacy_event_type = 3; 1518 break; 1519 case 0b0011011: 1520 case 0b0011010: 1521 // SCAN_RSP 1522 legacy_event_type = 4; 1523 break; 1524 default: 1525 legacy_event_type = 0; 1526 break; 1527 } 1528 uint16_t pos = 0; 1529 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1530 event[pos++] = 10u + data_length; 1531 event[pos++] = legacy_event_type; 1532 // copy address type + address 1533 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1534 offset += 7; 1535 pos += 7; 1536 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1537 offset += 4; 1538 // copy rssi 1539 event[pos++] = packet[offset++]; 1540 // skip periodic advertising interval and direct address 1541 offset += 9; 1542 // copy data len + data; 1543 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1544 pos += 1 +data_length; 1545 offset += 1+ data_length; 1546 hci_emit_event(event, pos, 1); 1547 } else { 1548 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1549 uint8_t report_len = 24 + data_length; 1550 event[1] = report_len; 1551 little_endian_store_16(event, 2, event_type); 1552 memcpy(&event[4], &packet[offset], report_len); 1553 offset += report_len; 1554 hci_emit_event(event, 2 + report_len, 1); 1555 } 1556 } 1557 } 1558 #endif 1559 1560 #endif 1561 #endif 1562 1563 #ifdef ENABLE_BLE 1564 #ifdef ENABLE_LE_PERIPHERAL 1565 static void hci_update_advertisements_enabled_for_current_roles(void){ 1566 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1567 // get number of active le slave connections 1568 int num_slave_connections = 0; 1569 btstack_linked_list_iterator_t it; 1570 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1571 while (btstack_linked_list_iterator_has_next(&it)){ 1572 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1573 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1574 if (con->state != OPEN) continue; 1575 if (con->role != HCI_ROLE_SLAVE) continue; 1576 if (!hci_is_le_connection(con)) continue; 1577 num_slave_connections++; 1578 } 1579 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1580 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1581 } else { 1582 hci_stack->le_advertisements_enabled_for_current_roles = false; 1583 } 1584 } 1585 #endif 1586 #endif 1587 1588 #ifdef ENABLE_CLASSIC 1589 static void gap_run_set_local_name(void){ 1590 hci_reserve_packet_buffer(); 1591 uint8_t * packet = hci_stack->hci_packet_buffer; 1592 // construct HCI Command and send 1593 uint16_t opcode = hci_write_local_name.opcode; 1594 hci_stack->last_cmd_opcode = opcode; 1595 packet[0] = opcode & 0xff; 1596 packet[1] = opcode >> 8; 1597 packet[2] = DEVICE_NAME_LEN; 1598 memset(&packet[3], 0, DEVICE_NAME_LEN); 1599 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1600 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1601 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1602 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1603 // expand '00:00:00:00:00:00' in name with bd_addr 1604 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1605 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1606 } 1607 1608 static void gap_run_set_eir_data(void){ 1609 hci_reserve_packet_buffer(); 1610 uint8_t * packet = hci_stack->hci_packet_buffer; 1611 // construct HCI Command in-place and send 1612 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1613 hci_stack->last_cmd_opcode = opcode; 1614 uint16_t offset = 0; 1615 packet[offset++] = opcode & 0xff; 1616 packet[offset++] = opcode >> 8; 1617 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1618 packet[offset++] = 0; // FEC not required 1619 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1620 if (hci_stack->eir_data){ 1621 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1622 ad_context_t context; 1623 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1624 uint8_t data_type = ad_iterator_get_data_type(&context); 1625 uint8_t size = ad_iterator_get_data_len(&context); 1626 const uint8_t *data = ad_iterator_get_data(&context); 1627 // copy item 1628 packet[offset++] = size + 1; 1629 packet[offset++] = data_type; 1630 memcpy(&packet[offset], data, size); 1631 // update name item 1632 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1633 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1634 } 1635 offset += size; 1636 } 1637 } else { 1638 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1639 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1640 packet[offset++] = bytes_to_copy + 1; 1641 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1642 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1643 // expand '00:00:00:00:00:00' in name with bd_addr 1644 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1645 } 1646 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1647 } 1648 1649 static void hci_run_gap_tasks_classic(void){ 1650 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1651 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1652 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1653 return; 1654 } 1655 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1656 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1657 gap_run_set_local_name(); 1658 return; 1659 } 1660 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1661 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1662 gap_run_set_eir_data(); 1663 return; 1664 } 1665 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1666 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1667 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1668 return; 1669 } 1670 // write page scan activity 1671 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1672 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1673 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1674 return; 1675 } 1676 // write page scan type 1677 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1678 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1679 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1680 return; 1681 } 1682 // write page timeout 1683 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1684 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1685 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1686 return; 1687 } 1688 // send scan enable 1689 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1690 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1691 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1692 return; 1693 } 1694 // send write scan activity 1695 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1696 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1697 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1698 return; 1699 } 1700 } 1701 #endif 1702 1703 #ifndef HAVE_HOST_CONTROLLER_API 1704 1705 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1706 if (!hci_stack->config) return 0; 1707 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1708 // Limit baud rate for Broadcom chipsets to 3 mbps 1709 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1710 baud_rate = 3000000; 1711 } 1712 return baud_rate; 1713 } 1714 1715 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1716 UNUSED(ds); 1717 1718 switch (hci_stack->substate){ 1719 case HCI_INIT_W4_SEND_RESET: 1720 log_info("Resend HCI Reset"); 1721 hci_stack->substate = HCI_INIT_SEND_RESET; 1722 hci_stack->num_cmd_packets = 1; 1723 hci_run(); 1724 break; 1725 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1726 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1727 if (hci_stack->hci_transport->reset_link){ 1728 hci_stack->hci_transport->reset_link(); 1729 } 1730 1731 /* fall through */ 1732 1733 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1734 log_info("Resend HCI Reset - CSR Warm Boot"); 1735 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1736 hci_stack->num_cmd_packets = 1; 1737 hci_run(); 1738 break; 1739 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1740 if (hci_stack->hci_transport->set_baudrate){ 1741 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1742 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1743 hci_stack->hci_transport->set_baudrate(baud_rate); 1744 } 1745 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1746 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1747 if (hci_stack->hci_transport->reset_link){ 1748 log_info("Link Reset"); 1749 hci_stack->hci_transport->reset_link(); 1750 } 1751 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1752 hci_run(); 1753 } 1754 break; 1755 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1756 // otherwise continue 1757 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1758 hci_send_cmd(&hci_read_local_supported_commands); 1759 break; 1760 default: 1761 break; 1762 } 1763 } 1764 #endif 1765 1766 static void hci_initializing_next_state(void){ 1767 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1768 } 1769 1770 static void hci_init_done(void){ 1771 // done. tell the app 1772 log_info("hci_init_done -> HCI_STATE_WORKING"); 1773 hci_stack->state = HCI_STATE_WORKING; 1774 hci_emit_state(); 1775 } 1776 1777 // assumption: hci_can_send_command_packet_now() == true 1778 static void hci_initializing_run(void){ 1779 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1780 1781 if (!hci_can_send_command_packet_now()) return; 1782 1783 #ifndef HAVE_HOST_CONTROLLER_API 1784 bool need_baud_change = hci_stack->config 1785 && hci_stack->chipset 1786 && hci_stack->chipset->set_baudrate_command 1787 && hci_stack->hci_transport->set_baudrate 1788 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1789 #endif 1790 1791 switch (hci_stack->substate){ 1792 case HCI_INIT_SEND_RESET: 1793 hci_state_reset(); 1794 1795 #ifndef HAVE_HOST_CONTROLLER_API 1796 // prepare reset if command complete not received in 100ms 1797 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1798 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1799 btstack_run_loop_add_timer(&hci_stack->timeout); 1800 #endif 1801 // send command 1802 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1803 hci_send_cmd(&hci_reset); 1804 break; 1805 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1806 hci_send_cmd(&hci_read_local_version_information); 1807 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1808 break; 1809 1810 #ifndef HAVE_HOST_CONTROLLER_API 1811 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1812 hci_state_reset(); 1813 // prepare reset if command complete not received in 100ms 1814 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1815 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1816 btstack_run_loop_add_timer(&hci_stack->timeout); 1817 // send command 1818 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1819 hci_send_cmd(&hci_reset); 1820 break; 1821 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1822 hci_state_reset(); 1823 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1824 hci_send_cmd(&hci_reset); 1825 break; 1826 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1827 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1828 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1829 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1830 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1831 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1832 break; 1833 } 1834 case HCI_INIT_SET_BD_ADDR: 1835 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1836 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1837 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1838 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1839 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1840 break; 1841 case HCI_INIT_SEND_READ_LOCAL_NAME: 1842 #ifdef ENABLE_CLASSIC 1843 hci_send_cmd(&hci_read_local_name); 1844 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1845 break; 1846 #endif 1847 /* fall through */ 1848 1849 case HCI_INIT_SEND_BAUD_CHANGE: 1850 if (need_baud_change) { 1851 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1852 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1853 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1854 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1855 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1856 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1857 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1858 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1859 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1860 btstack_run_loop_add_timer(&hci_stack->timeout); 1861 } 1862 break; 1863 } 1864 1865 /* fall through */ 1866 1867 case HCI_INIT_CUSTOM_INIT: 1868 // Custom initialization 1869 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1870 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1871 bool send_cmd = false; 1872 switch (hci_stack->chipset_result){ 1873 case BTSTACK_CHIPSET_VALID_COMMAND: 1874 send_cmd = true; 1875 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1876 break; 1877 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1878 send_cmd = true; 1879 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1880 log_info("CSR Warm Boot"); 1881 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1882 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1883 btstack_run_loop_add_timer(&hci_stack->timeout); 1884 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1885 && hci_stack->config 1886 && hci_stack->chipset 1887 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1888 && hci_stack->hci_transport->set_baudrate 1889 && hci_transport_uart_get_main_baud_rate()){ 1890 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1891 } else { 1892 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1893 } 1894 break; 1895 default: 1896 break; 1897 } 1898 1899 if (send_cmd){ 1900 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1901 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1902 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1903 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1904 break; 1905 } 1906 log_info("Init script done"); 1907 1908 // Init script download on Broadcom chipsets causes: 1909 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1910 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1911 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1912 1913 // - baud rate to reset, restore UART baud rate if needed 1914 if (need_baud_change) { 1915 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1916 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1917 hci_stack->hci_transport->set_baudrate(baud_rate); 1918 } 1919 1920 uint16_t bcm_delay_ms = 300; 1921 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1922 // -> Work around: wait here. 1923 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1924 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1925 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1926 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1927 btstack_run_loop_add_timer(&hci_stack->timeout); 1928 break; 1929 } 1930 } 1931 #endif 1932 /* fall through */ 1933 1934 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1935 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1936 hci_send_cmd(&hci_read_local_supported_commands); 1937 break; 1938 case HCI_INIT_READ_BD_ADDR: 1939 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1940 hci_send_cmd(&hci_read_bd_addr); 1941 break; 1942 case HCI_INIT_READ_BUFFER_SIZE: 1943 // only read buffer size if supported 1944 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1945 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1946 hci_send_cmd(&hci_read_buffer_size); 1947 break; 1948 } 1949 1950 /* fall through */ 1951 1952 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1953 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1954 hci_send_cmd(&hci_read_local_supported_features); 1955 break; 1956 1957 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1958 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1959 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1960 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1961 break; 1962 case HCI_INIT_HOST_BUFFER_SIZE: 1963 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1964 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1965 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1966 break; 1967 #endif 1968 1969 case HCI_INIT_SET_EVENT_MASK: 1970 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1971 if (hci_le_supported()){ 1972 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1973 } else { 1974 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1975 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1976 } 1977 break; 1978 1979 case HCI_INIT_SET_EVENT_MASK_2: 1980 // On Bluettooth PTS dongle (BL 654) with PacketCraft HCI Firmware (LMP subversion) 0x5244, 1981 // setting Event Mask 2 causes Controller to drop Encryption Change events. 1982 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2) 1983 && (hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_PACKETCRAFT_INC)){ 1984 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1985 // Encryption Change Event v2 - bit 25 1986 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1987 break; 1988 } 1989 1990 #ifdef ENABLE_CLASSIC 1991 /* fall through */ 1992 1993 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1994 if (hci_classic_supported() && gap_ssp_supported()){ 1995 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1996 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1997 break; 1998 } 1999 2000 /* fall through */ 2001 2002 case HCI_INIT_WRITE_INQUIRY_MODE: 2003 if (hci_classic_supported()){ 2004 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 2005 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 2006 break; 2007 } 2008 2009 /* fall through */ 2010 2011 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 2012 // skip write secure connections host support if not supported or disabled 2013 if (hci_classic_supported() && hci_stack->secure_connections_enable 2014 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 2015 hci_stack->secure_connections_active = true; 2016 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 2017 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 2018 break; 2019 } 2020 2021 /* fall through */ 2022 2023 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 2024 // skip set min encryption key size 2025 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 2026 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 2027 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 2028 break; 2029 } 2030 2031 #ifdef ENABLE_SCO_OVER_HCI 2032 /* fall through */ 2033 2034 // only sent if ENABLE_SCO_OVER_HCI is defined 2035 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2036 // skip write synchronous flow control if not supported 2037 if (hci_classic_supported() 2038 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 2039 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2040 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 2041 break; 2042 } 2043 /* fall through */ 2044 2045 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2046 // skip write default erroneous data reporting if not supported 2047 if (hci_classic_supported() 2048 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 2049 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2050 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 2051 break; 2052 } 2053 #endif 2054 2055 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 2056 /* fall through */ 2057 2058 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 2059 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 2060 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2061 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 2062 #ifdef ENABLE_SCO_OVER_HCI 2063 log_info("BCM: Route SCO data via HCI transport"); 2064 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 2065 #endif 2066 #ifdef ENABLE_SCO_OVER_PCM 2067 log_info("BCM: Route SCO data via PCM interface"); 2068 #ifdef ENABLE_BCM_PCM_WBS 2069 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 2070 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 2071 #else 2072 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2073 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 2074 #endif 2075 #endif 2076 break; 2077 } 2078 #endif 2079 2080 #ifdef ENABLE_SCO_OVER_PCM 2081 /* fall through */ 2082 2083 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2084 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2085 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2086 log_info("BCM: Config PCM interface for I2S"); 2087 #ifdef ENABLE_BCM_PCM_WBS 2088 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 2089 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 2090 #else 2091 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2092 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 2093 #endif 2094 break; 2095 } 2096 #endif 2097 #endif 2098 2099 #ifdef ENABLE_BLE 2100 /* fall through */ 2101 2102 // LE INIT 2103 case HCI_INIT_LE_READ_BUFFER_SIZE: 2104 if (hci_le_supported()){ 2105 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2106 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2107 hci_send_cmd(&hci_le_read_buffer_size_v2); 2108 } else { 2109 hci_send_cmd(&hci_le_read_buffer_size); 2110 } 2111 break; 2112 } 2113 2114 /* fall through */ 2115 2116 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2117 // skip write le host if not supported (e.g. on LE only EM9301) 2118 if (hci_le_supported() 2119 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2120 // LE Supported Host = 1, Simultaneous Host = 0 2121 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2122 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2123 break; 2124 } 2125 2126 /* fall through */ 2127 2128 case HCI_INIT_LE_SET_EVENT_MASK: 2129 if (hci_le_supported()){ 2130 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2131 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2132 break; 2133 } 2134 #endif 2135 2136 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2137 /* fall through */ 2138 2139 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2140 if (hci_le_supported() 2141 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2142 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2143 hci_send_cmd(&hci_le_read_maximum_data_length); 2144 break; 2145 } 2146 2147 /* fall through */ 2148 2149 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2150 if (hci_le_supported() 2151 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2152 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2153 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2154 break; 2155 } 2156 #endif 2157 2158 #ifdef ENABLE_LE_CENTRAL 2159 /* fall through */ 2160 2161 case HCI_INIT_READ_WHITE_LIST_SIZE: 2162 if (hci_le_supported()){ 2163 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2164 hci_send_cmd(&hci_le_read_white_list_size); 2165 break; 2166 } 2167 2168 #endif 2169 2170 #ifdef ENABLE_LE_PERIPHERAL 2171 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2172 /* fall through */ 2173 2174 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2175 if (hci_extended_advertising_supported()){ 2176 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2177 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2178 break; 2179 } 2180 #endif 2181 #endif 2182 /* fall through */ 2183 2184 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2185 case HCI_INIT_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS: 2186 if (hci_le_supported()) { 2187 hci_stack->substate = HCI_INIT_W4_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS; 2188 hci_send_cmd(&hci_le_set_host_feature, 32, 1); 2189 break; 2190 } 2191 #endif 2192 2193 /* fall through */ 2194 2195 case HCI_INIT_DONE: 2196 hci_stack->substate = HCI_INIT_DONE; 2197 // main init sequence complete 2198 #ifdef ENABLE_CLASSIC 2199 // check if initial Classic GAP Tasks are completed 2200 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2201 hci_run_gap_tasks_classic(); 2202 break; 2203 } 2204 #endif 2205 #ifdef ENABLE_BLE 2206 #ifdef ENABLE_LE_CENTRAL 2207 // check if initial LE GAP Tasks are completed 2208 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2209 hci_run_general_gap_le(); 2210 break; 2211 } 2212 #endif 2213 #endif 2214 hci_init_done(); 2215 break; 2216 2217 default: 2218 return; 2219 } 2220 } 2221 2222 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2223 bool command_completed = false; 2224 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2225 uint16_t opcode = little_endian_read_16(packet,3); 2226 if (opcode == hci_stack->last_cmd_opcode){ 2227 command_completed = true; 2228 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2229 } else { 2230 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2231 } 2232 } 2233 2234 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2235 uint8_t status = packet[2]; 2236 uint16_t opcode = little_endian_read_16(packet,4); 2237 if (opcode == hci_stack->last_cmd_opcode){ 2238 if (status){ 2239 command_completed = true; 2240 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2241 } else { 2242 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2243 } 2244 } else { 2245 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2246 } 2247 } 2248 #ifndef HAVE_HOST_CONTROLLER_API 2249 // Vendor == CSR 2250 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2251 // TODO: track actual command 2252 command_completed = true; 2253 } 2254 2255 // Vendor == Toshiba 2256 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2257 // TODO: track actual command 2258 command_completed = true; 2259 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2260 hci_stack->num_cmd_packets = 1; 2261 } 2262 #endif 2263 2264 return command_completed; 2265 } 2266 2267 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2268 2269 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2270 2271 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2272 2273 #ifndef HAVE_HOST_CONTROLLER_API 2274 2275 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2276 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2277 // 2278 // HCI Reset 2279 // Timeout 100 ms 2280 // HCI Reset 2281 // Command Complete Reset 2282 // HCI Read Local Version Information 2283 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2284 // hang... 2285 // 2286 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2287 if (!command_completed 2288 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2289 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2290 2291 uint16_t opcode = little_endian_read_16(packet,3); 2292 if (opcode == hci_reset.opcode){ 2293 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2294 return; 2295 } 2296 } 2297 2298 // CSR & H5 2299 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2300 if (!command_completed 2301 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2302 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2303 2304 uint16_t opcode = little_endian_read_16(packet,3); 2305 if (opcode == hci_reset.opcode){ 2306 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2307 return; 2308 } 2309 } 2310 2311 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2312 // fix: Correct substate and behave as command below 2313 if (command_completed){ 2314 switch (hci_stack->substate){ 2315 case HCI_INIT_SEND_RESET: 2316 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2317 break; 2318 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2319 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2320 break; 2321 default: 2322 break; 2323 } 2324 } 2325 2326 #endif 2327 2328 if (!command_completed) return; 2329 2330 bool need_baud_change = false; 2331 bool need_addr_change = false; 2332 2333 #ifndef HAVE_HOST_CONTROLLER_API 2334 need_baud_change = hci_stack->config 2335 && hci_stack->chipset 2336 && hci_stack->chipset->set_baudrate_command 2337 && hci_stack->hci_transport->set_baudrate 2338 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2339 2340 need_addr_change = hci_stack->custom_bd_addr_set 2341 && hci_stack->chipset 2342 && hci_stack->chipset->set_bd_addr_command; 2343 #endif 2344 2345 switch(hci_stack->substate){ 2346 2347 #ifndef HAVE_HOST_CONTROLLER_API 2348 case HCI_INIT_SEND_RESET: 2349 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2350 // fix: just correct substate and behave as command below 2351 2352 /* fall through */ 2353 #endif 2354 2355 case HCI_INIT_W4_SEND_RESET: 2356 btstack_run_loop_remove_timer(&hci_stack->timeout); 2357 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2358 return; 2359 2360 #ifndef HAVE_HOST_CONTROLLER_API 2361 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2362 // for STLC2500D, baud rate change already happened. 2363 // for others, baud rate gets changed now 2364 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2365 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2366 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2367 hci_stack->hci_transport->set_baudrate(baud_rate); 2368 } 2369 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2370 return; 2371 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2372 btstack_run_loop_remove_timer(&hci_stack->timeout); 2373 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2374 return; 2375 case HCI_INIT_W4_CUSTOM_INIT: 2376 // repeat custom init 2377 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2378 return; 2379 #endif 2380 2381 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2382 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2383 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2384 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2385 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2386 return; 2387 } 2388 if (need_addr_change){ 2389 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2390 return; 2391 } 2392 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2393 return; 2394 #ifndef HAVE_HOST_CONTROLLER_API 2395 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2396 if (need_baud_change){ 2397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2398 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2399 hci_stack->hci_transport->set_baudrate(baud_rate); 2400 } 2401 if (need_addr_change){ 2402 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2403 return; 2404 } 2405 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2406 return; 2407 case HCI_INIT_W4_SET_BD_ADDR: 2408 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2409 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2410 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2411 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2412 return; 2413 } 2414 // skipping st warm boot 2415 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2416 return; 2417 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2418 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2419 return; 2420 #endif 2421 2422 case HCI_INIT_DONE: 2423 // set state if we came here by fall through 2424 hci_stack->substate = HCI_INIT_DONE; 2425 return; 2426 2427 default: 2428 break; 2429 } 2430 hci_initializing_next_state(); 2431 } 2432 2433 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2434 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2435 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2436 // check if we have been aware of the HCI connection 2437 switch (conn->state){ 2438 case SENT_CREATE_CONNECTION: 2439 case RECEIVED_CONNECTION_REQUEST: 2440 break; 2441 default: 2442 return; 2443 } 2444 2445 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2446 bd_addr_t bd_address; 2447 (void)memcpy(&bd_address, conn->address, 6); 2448 2449 #ifdef ENABLE_CLASSIC 2450 // cache needed data 2451 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2452 #endif 2453 2454 // connection failed, remove entry 2455 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2456 btstack_memory_hci_connection_free( conn ); 2457 2458 #ifdef ENABLE_CLASSIC 2459 // notify client if dedicated bonding 2460 if (notify_dedicated_bonding_failed){ 2461 log_info("hci notify_dedicated_bonding_failed"); 2462 hci_emit_dedicated_bonding_result(bd_address, status); 2463 } 2464 2465 // if authentication error, also delete link key 2466 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2467 gap_drop_link_key_for_bd_addr(bd_address); 2468 } 2469 #else 2470 UNUSED(status); 2471 #endif 2472 } 2473 2474 #ifdef ENABLE_CLASSIC 2475 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2476 // SSP Controller 2477 if (features[6] & (1 << 3)){ 2478 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2479 } 2480 // eSCO 2481 if (features[3] & (1<<7)){ 2482 conn->remote_supported_features[0] |= 1; 2483 } 2484 // Extended features 2485 if (features[7] & (1<<7)){ 2486 conn->remote_supported_features[0] |= 2; 2487 } 2488 } 2489 2490 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2491 // SSP Host 2492 if (features[0] & (1 << 0)){ 2493 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2494 } 2495 // SC Host 2496 if (features[0] & (1 << 3)){ 2497 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2498 } 2499 } 2500 2501 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2502 // SC Controller 2503 if (features[1] & (1 << 0)){ 2504 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2505 } 2506 } 2507 2508 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2509 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2510 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2511 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2512 if (conn->bonding_flags & BONDING_DEDICATED){ 2513 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2514 } 2515 } 2516 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2517 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2518 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2519 } 2520 2521 #endif 2522 2523 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2524 // handle BT initialization 2525 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2526 hci_initializing_event_handler(packet, size); 2527 } 2528 2529 // help with BT sleep 2530 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2531 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2532 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2533 && (hci_event_command_complete_get_command_opcode(packet) == HCI_OPCODE_HCI_WRITE_SCAN_ENABLE)){ 2534 hci_initializing_next_state(); 2535 } 2536 } 2537 2538 #ifdef ENABLE_CLASSIC 2539 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2540 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2541 conn->encryption_key_size = encryption_key_size; 2542 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2543 2544 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2545 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2546 conn->bonding_flags &= ~BONDING_DEDICATED; 2547 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2548 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2549 return; 2550 } 2551 2552 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2553 conn->requested_security_level = LEVEL_0; 2554 hci_emit_security_level(conn->con_handle, security_level); 2555 return; 2556 } 2557 2558 // Request remote features if not already done 2559 hci_trigger_remote_features_for_connection(conn); 2560 2561 // Request Authentication if not already done 2562 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2563 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2564 } 2565 #endif 2566 2567 static void hci_store_local_supported_commands(const uint8_t * packet){ 2568 // create mapping table 2569 #define X(name, offset, bit) { offset, bit }, 2570 static struct { 2571 uint8_t byte_offset; 2572 uint8_t bit_position; 2573 } supported_hci_commands_map [] = { 2574 SUPPORTED_HCI_COMMANDS 2575 }; 2576 #undef X 2577 2578 // create names for debug purposes 2579 #ifdef ENABLE_LOG_DEBUG 2580 #define X(name, offset, bit) #name, 2581 static const char * command_names[] = { 2582 SUPPORTED_HCI_COMMANDS 2583 }; 2584 #undef X 2585 #endif 2586 2587 hci_stack->local_supported_commands = 0; 2588 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2589 uint16_t i; 2590 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2591 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2592 #ifdef ENABLE_LOG_DEBUG 2593 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); 2594 #else 2595 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2596 #endif 2597 hci_stack->local_supported_commands |= (1LU << i); 2598 } 2599 } 2600 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2601 } 2602 2603 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2604 UNUSED(size); 2605 2606 uint16_t manufacturer; 2607 #ifdef ENABLE_CLASSIC 2608 hci_con_handle_t handle; 2609 hci_connection_t * conn; 2610 #endif 2611 #if defined(ENABLE_CLASSIC) || (defined(ENABLE_BLE) && defined(ENABLE_LE_ISOCHRONOUS_STREAMS)) 2612 uint8_t status; 2613 #endif 2614 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2615 le_audio_cig_t * cig; 2616 #endif 2617 2618 // get num cmd packets - limit to 1 to reduce complexity 2619 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2620 2621 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2622 switch (opcode){ 2623 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2624 if (packet[5]) break; 2625 // terminate, name 248 chars 2626 packet[6+248] = 0; 2627 log_info("local name: %s", &packet[6]); 2628 break; 2629 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2630 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2631 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2632 uint16_t acl_len = little_endian_read_16(packet, 6); 2633 uint16_t sco_len = packet[8]; 2634 2635 // determine usable ACL/SCO payload size 2636 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2637 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2638 2639 hci_stack->acl_packets_total_num = (uint8_t) btstack_min(little_endian_read_16(packet, 9), MAX_NR_CONTROLLER_ACL_BUFFERS); 2640 hci_stack->sco_packets_total_num = (uint8_t) btstack_min(little_endian_read_16(packet, 11), MAX_NR_CONTROLLER_SCO_PACKETS); 2641 2642 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2643 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2644 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2645 } 2646 break; 2647 case HCI_OPCODE_HCI_READ_RSSI: 2648 if (packet[5] == ERROR_CODE_SUCCESS){ 2649 uint8_t event[5]; 2650 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2651 event[1] = 3; 2652 (void)memcpy(&event[2], &packet[6], 3); 2653 hci_emit_event(event, sizeof(event), 1); 2654 } 2655 break; 2656 #ifdef ENABLE_BLE 2657 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2658 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2659 hci_stack->le_iso_packets_total_num = packet[11]; 2660 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2661 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2662 2663 /* fall through */ 2664 2665 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2666 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2667 hci_stack->le_acl_packets_total_num = packet[8]; 2668 // determine usable ACL payload size 2669 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2670 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2671 } 2672 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); 2673 break; 2674 #endif 2675 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2676 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2677 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2678 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2679 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); 2680 break; 2681 #endif 2682 #ifdef ENABLE_LE_CENTRAL 2683 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2684 hci_stack->le_whitelist_capacity = packet[6]; 2685 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2686 break; 2687 #endif 2688 #ifdef ENABLE_LE_PERIPHERAL 2689 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2690 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2691 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2692 break; 2693 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2694 if (hci_stack->le_advertising_set_in_current_command != 0) { 2695 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2696 hci_stack->le_advertising_set_in_current_command = 0; 2697 if (advertising_set == NULL) break; 2698 uint8_t adv_status = packet[6]; 2699 uint8_t tx_power = packet[7]; 2700 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 }; 2701 if (adv_status == 0){ 2702 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2703 } 2704 hci_emit_event(event, sizeof(event), 1); 2705 } 2706 break; 2707 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2708 if (hci_stack->le_advertising_set_in_current_command != 0) { 2709 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2710 hci_stack->le_advertising_set_in_current_command = 0; 2711 if (advertising_set == NULL) break; 2712 uint8_t adv_status = packet[5]; 2713 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2714 if (adv_status == 0){ 2715 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2716 } 2717 hci_emit_event(event, sizeof(event), 1); 2718 } 2719 break; 2720 #endif 2721 #endif 2722 case HCI_OPCODE_HCI_READ_BD_ADDR: 2723 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2724 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)); 2725 #ifdef ENABLE_CLASSIC 2726 if (hci_stack->link_key_db){ 2727 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2728 } 2729 #endif 2730 break; 2731 #ifdef ENABLE_CLASSIC 2732 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2733 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 2734 break; 2735 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2736 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2737 if (status == ERROR_CODE_SUCCESS) { 2738 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2739 } else { 2740 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2741 } 2742 break; 2743 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2744 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2745 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2746 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2747 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2748 hci_emit_event(event, sizeof(event), 1); 2749 } 2750 break; 2751 #endif 2752 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2753 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2754 2755 #ifdef ENABLE_CLASSIC 2756 // determine usable ACL packet types based on host buffer size and supported features 2757 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2758 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2759 #endif 2760 // Classic/LE 2761 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2762 break; 2763 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2764 manufacturer = little_endian_read_16(packet, 10); 2765 // map Cypress to Broadcom 2766 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2767 log_info("Treat Cypress as Broadcom"); 2768 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2769 little_endian_store_16(packet, 10, manufacturer); 2770 } 2771 hci_stack->manufacturer = manufacturer; 2772 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2773 break; 2774 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2775 hci_store_local_supported_commands(packet); 2776 break; 2777 #ifdef ENABLE_CLASSIC 2778 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2779 if (packet[5]) return; 2780 hci_stack->synchronous_flow_control_enabled = 1; 2781 break; 2782 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2783 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2784 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2785 conn = hci_connection_for_handle(handle); 2786 if (conn != NULL) { 2787 uint8_t key_size = 0; 2788 if (status == 0){ 2789 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2790 log_info("Handle %04x key Size: %u", handle, key_size); 2791 } else { 2792 key_size = 1; 2793 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2794 } 2795 hci_handle_read_encryption_key_size_complete(conn, key_size); 2796 } 2797 break; 2798 // assert pairing complete event is emitted. 2799 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2800 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2801 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2802 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2803 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2804 // lookup connection by gap pairing addr 2805 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2806 if (conn == NULL) break; 2807 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2808 break; 2809 2810 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2811 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2812 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2813 uint8_t event[67]; 2814 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2815 event[1] = 65; 2816 (void)memset(&event[2], 0, 65); 2817 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2818 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2819 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2820 event[2] = 3; 2821 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2822 } else { 2823 event[2] = 1; 2824 } 2825 } 2826 hci_emit_event(event, sizeof(event), 0); 2827 break; 2828 } 2829 2830 // note: only needed if user does not provide OOB data 2831 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2832 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2833 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2834 if (conn == NULL) break; 2835 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2836 break; 2837 #endif 2838 #endif 2839 #ifdef ENABLE_BLE 2840 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2841 case HCI_OPCODE_HCI_LE_SET_CIG_PARAMETERS: 2842 // lookup CIG 2843 cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 2844 if (cig != NULL){ 2845 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2846 uint8_t i = 0; 2847 if (status == ERROR_CODE_SUCCESS){ 2848 // assign CIS handles to pre-allocated CIS 2849 btstack_linked_list_iterator_t it; 2850 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 2851 while (btstack_linked_list_iterator_has_next(&it) && (i < cig->num_cis)) { 2852 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 2853 if ((iso_stream->group_id == hci_stack->iso_active_operation_group_id) && 2854 (iso_stream->iso_type == HCI_ISO_TYPE_CIS)){ 2855 hci_con_handle_t cis_handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3+(2*i)); 2856 iso_stream->con_handle = cis_handle; 2857 cig->cis_con_handles[i] = cis_handle; 2858 i++; 2859 } 2860 } 2861 cig->state = LE_AUDIO_CIG_STATE_W4_CIS_REQUEST; 2862 hci_emit_cig_created(cig, status); 2863 } else { 2864 hci_emit_cig_created(cig, status); 2865 btstack_linked_list_remove(&hci_stack->le_audio_cigs, (btstack_linked_item_t *) cig); 2866 } 2867 } 2868 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2869 break; 2870 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2871 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2872 if (status != ERROR_CODE_SUCCESS){ 2873 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 2874 } 2875 break; 2876 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2877 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2878 if (status != ERROR_CODE_SUCCESS){ 2879 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 2880 } 2881 break; 2882 case HCI_OPCODE_HCI_LE_SETUP_ISO_DATA_PATH: { 2883 // lookup BIG by state 2884 btstack_linked_list_iterator_t it; 2885 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 2886 while (btstack_linked_list_iterator_has_next(&it)) { 2887 le_audio_big_t *big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 2888 if (big->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2889 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2890 if (status == ERROR_CODE_SUCCESS){ 2891 big->state_vars.next_bis++; 2892 if (big->state_vars.next_bis == big->num_bis){ 2893 big->state = LE_AUDIO_BIG_STATE_ACTIVE; 2894 hci_emit_big_created(big, ERROR_CODE_SUCCESS); 2895 } else { 2896 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2897 } 2898 } else { 2899 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2900 big->state_vars.status = status; 2901 } 2902 return; 2903 } 2904 } 2905 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2906 while (btstack_linked_list_iterator_has_next(&it)) { 2907 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2908 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2909 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2910 if (status == ERROR_CODE_SUCCESS){ 2911 big_sync->state_vars.next_bis++; 2912 if (big_sync->state_vars.next_bis == big_sync->num_bis){ 2913 big_sync->state = LE_AUDIO_BIG_STATE_ACTIVE; 2914 hci_emit_big_sync_created(big_sync, ERROR_CODE_SUCCESS); 2915 } else { 2916 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2917 } 2918 } else { 2919 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2920 big_sync->state_vars.status = status; 2921 } 2922 return; 2923 } 2924 } 2925 // Lookup CIS via active group operation 2926 if (hci_stack->iso_active_operation_type == HCI_ISO_TYPE_CIS){ 2927 if (hci_stack->iso_active_operation_group_id == HCI_ISO_GROUP_ID_SINGLE_CIS){ 2928 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2929 2930 // lookup CIS by state 2931 btstack_linked_list_iterator_t it; 2932 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 2933 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2934 while (btstack_linked_list_iterator_has_next(&it)){ 2935 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 2936 handle = iso_stream->con_handle; 2937 switch (iso_stream->state){ 2938 case HCI_ISO_STREAM_STATE_W4_ISO_SETUP_INPUT: 2939 if (status != ERROR_CODE_SUCCESS){ 2940 hci_iso_stream_finalize(iso_stream); 2941 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, status); 2942 break; 2943 } 2944 if (iso_stream->max_sdu_c_to_p > 0){ 2945 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT; 2946 } else { 2947 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, ERROR_CODE_SUCCESS); 2948 } 2949 break; 2950 case HCI_ISO_STREAM_STATE_W4_ISO_SETUP_OUTPUT: 2951 if (status != ERROR_CODE_SUCCESS){ 2952 hci_iso_stream_finalize(iso_stream); 2953 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, status); 2954 break; 2955 } 2956 hci_emit_cis_created(HCI_ISO_GROUP_ID_SINGLE_CIS, handle, ERROR_CODE_SUCCESS); 2957 break; 2958 default: 2959 break; 2960 } 2961 } 2962 } else { 2963 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 2964 cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 2965 if (cig != NULL) { 2966 // emit cis created if all ISO Paths have been created 2967 // assume we are central 2968 uint8_t cis_index = cig->state_vars.next_cis >> 1; 2969 uint8_t cis_direction = cig->state_vars.next_cis & 1; 2970 bool outgoing_needed = cig->params->cis_params[cis_index].max_sdu_p_to_c > 0; 2971 // if outgoing has been setup, or incoming was setup but outgoing not required 2972 if ((cis_direction == 1) || (outgoing_needed == false)){ 2973 hci_emit_cis_created(cig->cig_id, cig->cis_con_handles[cis_index], status); 2974 } 2975 // next state 2976 cig->state_vars.next_cis++; 2977 cig->state = LE_AUDIO_CIG_STATE_SETUP_ISO_PATH; 2978 } 2979 } 2980 } 2981 break; 2982 } 2983 case HCI_OPCODE_HCI_LE_BIG_TERMINATE_SYNC: { 2984 // lookup BIG by state 2985 btstack_linked_list_iterator_t it; 2986 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2987 while (btstack_linked_list_iterator_has_next(&it)) { 2988 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2989 uint8_t big_handle = big_sync->big_handle; 2990 switch (big_sync->state){ 2991 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 2992 btstack_linked_list_iterator_remove(&it); 2993 hci_emit_big_sync_created(big_sync, big_sync->state_vars.status); 2994 return; 2995 default: 2996 btstack_linked_list_iterator_remove(&it); 2997 hci_emit_big_sync_stopped(big_handle); 2998 return; 2999 } 3000 } 3001 break; 3002 } 3003 #endif 3004 #endif 3005 default: 3006 break; 3007 } 3008 } 3009 3010 static void handle_command_status_event(uint8_t * packet, uint16_t size) { 3011 UNUSED(size); 3012 3013 // get num cmd packets - limit to 1 to reduce complexity 3014 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 3015 3016 // get opcode and command status 3017 uint16_t opcode = hci_event_command_status_get_command_opcode(packet); 3018 3019 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) || defined(ENABLE_LE_ISOCHRONOUS_STREAMS) 3020 uint8_t status = hci_event_command_status_get_status(packet); 3021 #endif 3022 3023 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 3024 bd_addr_type_t addr_type; 3025 #endif 3026 3027 switch (opcode){ 3028 #ifdef ENABLE_CLASSIC 3029 case HCI_OPCODE_HCI_CREATE_CONNECTION: 3030 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 3031 #endif 3032 #ifdef ENABLE_LE_CENTRAL 3033 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 3034 #endif 3035 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 3036 addr_type = hci_stack->outgoing_addr_type; 3037 3038 // reset outgoing address info 3039 memset(hci_stack->outgoing_addr, 0, 6); 3040 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 3041 3042 // on error 3043 if (status != ERROR_CODE_SUCCESS){ 3044 #ifdef ENABLE_LE_CENTRAL 3045 if (hci_is_le_connection_type(addr_type)){ 3046 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3047 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3048 } 3049 #endif 3050 // error => outgoing connection failed 3051 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 3052 if (conn != NULL){ 3053 hci_handle_connection_failed(conn, status); 3054 } 3055 } 3056 break; 3057 #endif 3058 #ifdef ENABLE_CLASSIC 3059 case HCI_OPCODE_HCI_INQUIRY: 3060 if (status == ERROR_CODE_SUCCESS) { 3061 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3062 } else { 3063 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3064 } 3065 break; 3066 #endif 3067 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3068 case HCI_OPCODE_HCI_LE_CREATE_CIS: 3069 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 3070 if (status == ERROR_CODE_SUCCESS){ 3071 hci_iso_stream_requested_confirm(HCI_ISO_GROUP_ID_INVALID); 3072 } else { 3073 hci_iso_stream_requested_finalize(HCI_ISO_GROUP_ID_INVALID); 3074 } 3075 break; 3076 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 3077 default: 3078 break; 3079 } 3080 } 3081 3082 #ifdef ENABLE_BLE 3083 static void event_handle_le_connection_complete(const uint8_t * packet){ 3084 bd_addr_t addr; 3085 bd_addr_type_t addr_type; 3086 hci_connection_t * conn; 3087 3088 // Connection management 3089 reverse_bd_addr(&packet[8], addr); 3090 addr_type = (bd_addr_type_t)packet[7]; 3091 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 3092 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3093 3094 #ifdef ENABLE_LE_CENTRAL 3095 // handle error: error is reported only to the initiator -> outgoing connection 3096 if (packet[3]){ 3097 3098 // handle cancelled outgoing connection 3099 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 3100 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 3101 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 3102 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 3103 // reset state 3104 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3105 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3106 // get outgoing connection conn struct for direct connect 3107 conn = gap_get_outgoing_connection(); 3108 } 3109 3110 // outgoing le connection establishment is done 3111 if (conn){ 3112 // remove entry 3113 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3114 btstack_memory_hci_connection_free( conn ); 3115 } 3116 return; 3117 } 3118 #endif 3119 3120 // on success, both hosts receive connection complete event 3121 if (packet[6] == HCI_ROLE_MASTER){ 3122 #ifdef ENABLE_LE_CENTRAL 3123 // if we're master on an le connection, it was an outgoing connection and we're done with it 3124 // note: no hci_connection_t object exists yet for connect with whitelist 3125 if (hci_is_le_connection_type(addr_type)){ 3126 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3127 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3128 } 3129 #endif 3130 } else { 3131 #ifdef ENABLE_LE_PERIPHERAL 3132 // if we're slave, it was an incoming connection, advertisements have stopped 3133 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3134 #endif 3135 } 3136 3137 // LE connections are auto-accepted, so just create a connection if there isn't one already 3138 if (!conn){ 3139 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3140 } 3141 3142 // no memory, sorry. 3143 if (!conn){ 3144 return; 3145 } 3146 3147 conn->state = OPEN; 3148 conn->role = packet[6]; 3149 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 3150 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 3151 3152 // workaround: PAST doesn't work without LE Read Remote Features on PacketCraft Controller with LMP 568B 3153 conn->gap_connection_tasks = GAP_CONNECTION_TASK_LE_READ_REMOTE_FEATURES; 3154 3155 #ifdef ENABLE_LE_PERIPHERAL 3156 if (packet[6] == HCI_ROLE_SLAVE){ 3157 hci_update_advertisements_enabled_for_current_roles(); 3158 } 3159 #endif 3160 3161 // init unenhanced att bearer mtu 3162 conn->att_connection.mtu = ATT_DEFAULT_MTU; 3163 conn->att_connection.mtu_exchanged = false; 3164 3165 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 3166 3167 // restart timer 3168 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3169 // btstack_run_loop_add_timer(&conn->timeout); 3170 3171 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3172 3173 hci_emit_nr_connections_changed(); 3174 } 3175 #endif 3176 3177 #ifdef ENABLE_CLASSIC 3178 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){ 3179 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 3180 // LEVEL_4 is tested by l2cap 3181 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 3182 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 3183 if (level >= LEVEL_3){ 3184 // MITM not possible without keyboard or display 3185 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3186 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3187 3188 // MITM possible if one side has keyboard and the other has keyboard or display 3189 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3190 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3191 3192 // MITM not possible if one side has only display and other side has no keyboard 3193 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3194 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3195 } 3196 // LEVEL 2 requires SSP, which is a given 3197 return true; 3198 } 3199 3200 static bool btstack_is_null(uint8_t * data, uint16_t size){ 3201 uint16_t i; 3202 for (i=0; i < size ; i++){ 3203 if (data[i] != 0) { 3204 return false; 3205 } 3206 } 3207 return true; 3208 } 3209 3210 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 3211 // get requested security level 3212 gap_security_level_t requested_security_level = conn->requested_security_level; 3213 if (hci_stack->gap_secure_connections_only_mode){ 3214 requested_security_level = LEVEL_4; 3215 } 3216 3217 // assess security: LEVEL 4 requires SC 3218 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 3219 if ((requested_security_level == LEVEL_4) && 3220 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 3221 !hci_remote_sc_enabled(conn)){ 3222 log_info("Level 4 required, but SC not supported -> abort"); 3223 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3224 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3225 return; 3226 } 3227 3228 // assess security based on io capabilities 3229 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 3230 // responder: fully validate io caps of both sides as well as OOB data 3231 bool security_possible = false; 3232 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 3233 3234 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3235 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 3236 // so we merge the OOB data availability 3237 uint8_t have_oob_data = conn->io_cap_response_oob_data; 3238 if (conn->classic_oob_c_192 != NULL){ 3239 have_oob_data |= 1; 3240 } 3241 if (conn->classic_oob_c_256 != NULL){ 3242 have_oob_data |= 2; 3243 } 3244 // for up to Level 3, either P-192 as well as P-256 will do 3245 // 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 3246 // if remote does not SC, we should not receive P-256 data either 3247 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 3248 security_possible = true; 3249 } 3250 // for Level 4, P-256 is needed 3251 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 3252 security_possible = true; 3253 } 3254 #endif 3255 3256 if (security_possible == false){ 3257 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 3258 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3259 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3260 return; 3261 } 3262 } else { 3263 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 3264 #ifndef ENABLE_CLASSIC_PAIRING_OOB 3265 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3266 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 3267 log_info("Level 3+ required, but no input/output -> abort"); 3268 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3269 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3270 return; 3271 } 3272 #endif 3273 #endif 3274 } 3275 3276 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3277 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 3278 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 3279 } else { 3280 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3281 } 3282 #endif 3283 } 3284 3285 #endif 3286 3287 static void event_handler(uint8_t *packet, uint16_t size){ 3288 3289 uint16_t event_length = packet[1]; 3290 3291 // assert packet is complete 3292 if (size != (event_length + 2u)){ 3293 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 3294 return; 3295 } 3296 3297 hci_con_handle_t handle; 3298 hci_connection_t * conn; 3299 int i; 3300 3301 #ifdef ENABLE_CLASSIC 3302 hci_link_type_t link_type; 3303 bd_addr_t addr; 3304 bd_addr_type_t addr_type; 3305 #endif 3306 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3307 hci_iso_stream_t * iso_stream; 3308 le_audio_big_t * big; 3309 le_audio_big_sync_t * big_sync; 3310 #endif 3311 3312 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 3313 3314 switch (hci_event_packet_get_type(packet)) { 3315 3316 case HCI_EVENT_COMMAND_COMPLETE: 3317 handle_command_complete_event(packet, size); 3318 break; 3319 3320 case HCI_EVENT_COMMAND_STATUS: 3321 handle_command_status_event(packet, size); 3322 break; 3323 3324 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3325 if (size < 3) return; 3326 uint16_t num_handles = packet[2]; 3327 if (size != (3u + num_handles * 4u)) return; 3328 #ifdef ENABLE_CLASSIC 3329 bool notify_sco = false; 3330 #endif 3331 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3332 bool notify_iso = false; 3333 #endif 3334 uint16_t offset = 3; 3335 for (i=0; i<num_handles;i++){ 3336 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3337 offset += 2u; 3338 uint16_t num_packets = little_endian_read_16(packet, offset); 3339 offset += 2u; 3340 3341 conn = hci_connection_for_handle(handle); 3342 if (conn != NULL) { 3343 3344 if (conn->num_packets_sent >= num_packets) { 3345 conn->num_packets_sent -= num_packets; 3346 } else { 3347 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3348 conn->num_packets_sent = 0; 3349 } 3350 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3351 #ifdef ENABLE_CLASSIC 3352 if (conn->address_type == BD_ADDR_TYPE_SCO){ 3353 notify_sco = true; 3354 } 3355 #endif 3356 } 3357 3358 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 3359 hci_controller_dump_packets(); 3360 #endif 3361 3362 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3363 if (conn == NULL){ 3364 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(handle); 3365 if (iso_stream != NULL){ 3366 if (iso_stream->num_packets_sent >= num_packets) { 3367 iso_stream->num_packets_sent -= num_packets; 3368 } else { 3369 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3370 iso_stream->num_packets_sent = 0; 3371 } 3372 if (iso_stream->iso_type == HCI_ISO_TYPE_BIS){ 3373 le_audio_big_t * big = hci_big_for_handle(iso_stream->group_id); 3374 if (big != NULL){ 3375 big->num_completed_timestamp_current_valid = true; 3376 big->num_completed_timestamp_current_ms = btstack_run_loop_get_time_ms(); 3377 } 3378 } 3379 log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", 3380 num_packets, handle, iso_stream->num_packets_sent); 3381 notify_iso = true; 3382 } 3383 } 3384 #endif 3385 } 3386 3387 #ifdef ENABLE_CLASSIC 3388 if (notify_sco){ 3389 hci_notify_if_sco_can_send_now(); 3390 } 3391 #endif 3392 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3393 if (notify_iso){ 3394 hci_iso_notify_can_send_now(); 3395 } 3396 #endif 3397 break; 3398 } 3399 3400 #ifdef ENABLE_CLASSIC 3401 case HCI_EVENT_FLUSH_OCCURRED: 3402 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3403 handle = hci_event_flush_occurred_get_handle(packet); 3404 conn = hci_connection_for_handle(handle); 3405 if (conn) { 3406 log_info("Flush occurred, disconnect 0x%04x", handle); 3407 conn->state = SEND_DISCONNECT; 3408 } 3409 break; 3410 3411 case HCI_EVENT_INQUIRY_COMPLETE: 3412 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3413 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3414 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3415 hci_emit_event(event, sizeof(event), 1); 3416 } 3417 break; 3418 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3419 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3420 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3421 } 3422 break; 3423 case HCI_EVENT_CONNECTION_REQUEST: 3424 reverse_bd_addr(&packet[2], addr); 3425 link_type = (hci_link_type_t) packet[11]; 3426 3427 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3428 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3429 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3430 bd_addr_copy(hci_stack->decline_addr, addr); 3431 break; 3432 } 3433 3434 if (hci_stack->gap_classic_accept_callback != NULL){ 3435 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3436 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS; 3437 bd_addr_copy(hci_stack->decline_addr, addr); 3438 break; 3439 } 3440 } 3441 3442 // TODO: eval COD 8-10 3443 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3444 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3445 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3446 if (!conn) { 3447 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3448 } 3449 if (!conn) { 3450 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3451 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3452 bd_addr_copy(hci_stack->decline_addr, addr); 3453 hci_run(); 3454 // avoid event to higher layer 3455 return; 3456 } 3457 conn->role = HCI_ROLE_SLAVE; 3458 conn->state = RECEIVED_CONNECTION_REQUEST; 3459 // store info about eSCO 3460 if (link_type == HCI_LINK_TYPE_ESCO){ 3461 conn->remote_supported_features[0] |= 1; 3462 } 3463 hci_run(); 3464 break; 3465 3466 case HCI_EVENT_CONNECTION_COMPLETE: 3467 // Connection management 3468 reverse_bd_addr(&packet[5], addr); 3469 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3470 addr_type = BD_ADDR_TYPE_ACL; 3471 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3472 if (conn) { 3473 if (!packet[2]){ 3474 conn->state = OPEN; 3475 conn->con_handle = little_endian_read_16(packet, 3); 3476 3477 // trigger write supervision timeout if we're master 3478 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3479 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3480 } 3481 3482 // trigger write automatic flush timeout 3483 if (hci_stack->automatic_flush_timeout != 0){ 3484 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3485 } 3486 3487 // restart timer 3488 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3489 btstack_run_loop_add_timer(&conn->timeout); 3490 3491 // trigger remote features for dedicated bonding 3492 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3493 hci_trigger_remote_features_for_connection(conn); 3494 } 3495 3496 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3497 3498 hci_emit_nr_connections_changed(); 3499 } else { 3500 // connection failed 3501 hci_handle_connection_failed(conn, packet[2]); 3502 } 3503 } 3504 break; 3505 3506 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3507 reverse_bd_addr(&packet[5], addr); 3508 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3509 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3510 if (packet[2]){ 3511 // connection failed 3512 if (conn){ 3513 hci_handle_connection_failed(conn, packet[2]); 3514 } 3515 break; 3516 } 3517 if (!conn) { 3518 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3519 } 3520 if (!conn) { 3521 break; 3522 } 3523 conn->state = OPEN; 3524 conn->con_handle = little_endian_read_16(packet, 3); 3525 3526 #ifdef ENABLE_SCO_OVER_HCI 3527 // update SCO 3528 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3529 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3530 } 3531 // trigger can send now 3532 if (hci_have_usb_transport()){ 3533 hci_stack->sco_can_send_now = true; 3534 } 3535 #endif 3536 #ifdef HAVE_SCO_TRANSPORT 3537 // configure sco transport 3538 if (hci_stack->sco_transport != NULL){ 3539 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3540 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3541 } 3542 #endif 3543 break; 3544 3545 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3546 handle = little_endian_read_16(packet, 3); 3547 conn = hci_connection_for_handle(handle); 3548 if (!conn) break; 3549 if (!packet[2]){ 3550 const uint8_t * features = &packet[5]; 3551 hci_handle_remote_features_page_0(conn, features); 3552 3553 // read extended features if possible 3554 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3555 && ((conn->remote_supported_features[0] & 2) != 0)) { 3556 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3557 break; 3558 } 3559 } 3560 hci_handle_remote_features_received(conn); 3561 break; 3562 3563 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3564 handle = little_endian_read_16(packet, 3); 3565 conn = hci_connection_for_handle(handle); 3566 if (!conn) break; 3567 // status = ok, page = 1 3568 if (!packet[2]) { 3569 uint8_t page_number = packet[5]; 3570 uint8_t maximum_page_number = packet[6]; 3571 const uint8_t * features = &packet[7]; 3572 bool done = false; 3573 switch (page_number){ 3574 case 1: 3575 hci_handle_remote_features_page_1(conn, features); 3576 if (maximum_page_number >= 2){ 3577 // get Secure Connections (Controller) from Page 2 if available 3578 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3579 } else { 3580 // otherwise, assume SC (Controller) == SC (Host) 3581 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3582 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3583 } 3584 done = true; 3585 } 3586 break; 3587 case 2: 3588 hci_handle_remote_features_page_2(conn, features); 3589 done = true; 3590 break; 3591 default: 3592 break; 3593 } 3594 if (!done) break; 3595 } 3596 hci_handle_remote_features_received(conn); 3597 break; 3598 3599 case HCI_EVENT_LINK_KEY_REQUEST: 3600 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3601 hci_event_link_key_request_get_bd_addr(packet, addr); 3602 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3603 if (!conn) break; 3604 3605 // lookup link key in db if not cached 3606 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3607 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3608 } 3609 3610 // response sent by hci_run() 3611 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3612 #endif 3613 break; 3614 3615 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3616 hci_event_link_key_request_get_bd_addr(packet, addr); 3617 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3618 if (!conn) break; 3619 3620 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3621 3622 // CVE-2020-26555: ignore NULL link key 3623 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3624 if (btstack_is_null(&packet[8], 16)) break; 3625 3626 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3627 // Change Connection Encryption keeps link key type 3628 if (link_key_type != CHANGED_COMBINATION_KEY){ 3629 conn->link_key_type = link_key_type; 3630 } 3631 3632 // cache link key. link keys stored in little-endian format for legacy reasons 3633 memcpy(&conn->link_key, &packet[8], 16); 3634 3635 // only store link key: 3636 // - if bondable enabled 3637 if (hci_stack->bondable == false) break; 3638 // - if security level sufficient 3639 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3640 // - for SSP, also check if remote side requested bonding as well 3641 if (conn->link_key_type != COMBINATION_KEY){ 3642 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3643 if (!remote_bonding){ 3644 break; 3645 } 3646 } 3647 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3648 break; 3649 } 3650 3651 case HCI_EVENT_PIN_CODE_REQUEST: 3652 hci_event_pin_code_request_get_bd_addr(packet, addr); 3653 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3654 if (!conn) break; 3655 3656 hci_pairing_started(conn, false); 3657 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3658 if (!hci_stack->bondable ){ 3659 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3660 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3661 hci_run(); 3662 return; 3663 } 3664 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3665 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3666 log_info("Level 4 required, but SC not supported -> abort"); 3667 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3668 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3669 hci_run(); 3670 return; 3671 } 3672 break; 3673 3674 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3675 hci_event_io_capability_response_get_bd_addr(packet, addr); 3676 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3677 if (!conn) break; 3678 3679 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3680 hci_pairing_started(conn, true); 3681 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3682 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3683 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3684 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3685 #endif 3686 break; 3687 3688 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3689 hci_event_io_capability_response_get_bd_addr(packet, addr); 3690 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3691 if (!conn) break; 3692 3693 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3694 hci_connection_timestamp(conn); 3695 hci_pairing_started(conn, true); 3696 break; 3697 3698 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3699 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3700 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3701 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3702 if (!conn) break; 3703 3704 hci_connection_timestamp(conn); 3705 3706 hci_pairing_started(conn, true); 3707 3708 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3709 break; 3710 #endif 3711 3712 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3713 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3714 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3715 if (!conn) break; 3716 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3717 if (hci_stack->ssp_auto_accept){ 3718 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3719 }; 3720 } else { 3721 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3722 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3723 // don't forward event to app 3724 hci_run(); 3725 return; 3726 } 3727 break; 3728 3729 case HCI_EVENT_USER_PASSKEY_REQUEST: 3730 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3731 if (hci_stack->ssp_auto_accept){ 3732 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3733 }; 3734 break; 3735 3736 case HCI_EVENT_MODE_CHANGE: 3737 handle = hci_event_mode_change_get_handle(packet); 3738 conn = hci_connection_for_handle(handle); 3739 if (!conn) break; 3740 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3741 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3742 break; 3743 #endif 3744 3745 case HCI_EVENT_ENCRYPTION_CHANGE: 3746 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3747 handle = hci_event_encryption_change_get_connection_handle(packet); 3748 conn = hci_connection_for_handle(handle); 3749 if (!conn) break; 3750 if (hci_event_encryption_change_get_status(packet) == 0u) { 3751 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3752 if (encryption_enabled){ 3753 if (hci_is_le_connection(conn)){ 3754 // For LE, we accept connection as encrypted 3755 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3756 } 3757 #ifdef ENABLE_CLASSIC 3758 else { 3759 3760 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3761 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3762 bool connected_uses_aes_ccm = encryption_enabled == 2; 3763 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3764 log_info("SC during pairing, but only E0 now -> abort"); 3765 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3766 break; 3767 } 3768 3769 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3770 if (connected_uses_aes_ccm){ 3771 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3772 } 3773 3774 #ifdef ENABLE_TESTING_SUPPORT 3775 // work around for issue with PTS dongle 3776 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3777 #endif 3778 // validate encryption key size 3779 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3780 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3781 // already got encryption key size 3782 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3783 } else { 3784 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3785 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3786 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3787 } else { 3788 // if not, pretend everything is perfect 3789 hci_handle_read_encryption_key_size_complete(conn, 16); 3790 } 3791 } 3792 } 3793 #endif 3794 } else { 3795 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3796 } 3797 } else { 3798 uint8_t status = hci_event_encryption_change_get_status(packet); 3799 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3800 conn->bonding_flags &= ~BONDING_DEDICATED; 3801 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3802 conn->bonding_status = status; 3803 } 3804 } 3805 3806 break; 3807 3808 #ifdef ENABLE_CLASSIC 3809 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3810 handle = hci_event_authentication_complete_get_connection_handle(packet); 3811 conn = hci_connection_for_handle(handle); 3812 if (!conn) break; 3813 3814 // clear authentication active flag 3815 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3816 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3817 3818 // authenticated only if auth status == 0 3819 if (hci_event_authentication_complete_get_status(packet) == 0){ 3820 // authenticated 3821 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3822 3823 // If not already encrypted, start encryption 3824 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3825 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3826 break; 3827 } 3828 } 3829 3830 // emit updated security level 3831 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3832 break; 3833 3834 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3835 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3836 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3837 if (!conn) break; 3838 3839 // treat successfully paired connection as authenticated 3840 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3841 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3842 } 3843 3844 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3845 break; 3846 #endif 3847 3848 // HCI_EVENT_DISCONNECTION_COMPLETE 3849 // has been split, to first notify stack before shutting connection down 3850 // see end of function, too. 3851 case HCI_EVENT_DISCONNECTION_COMPLETE: 3852 if (packet[2]) break; // status != 0 3853 handle = little_endian_read_16(packet, 3); 3854 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3855 if (hci_stack->acl_fragmentation_total_size > 0u) { 3856 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3857 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3858 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3859 hci_stack->acl_fragmentation_total_size = 0; 3860 hci_stack->acl_fragmentation_pos = 0; 3861 if (release_buffer){ 3862 hci_release_packet_buffer(); 3863 } 3864 } 3865 } 3866 3867 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3868 // drop outgoing ISO fragments if it is for closed connection and release buffer if tx not active 3869 if (hci_stack->iso_fragmentation_total_size > 0u) { 3870 if (handle == READ_ISO_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3871 int release_buffer = hci_stack->iso_fragmentation_tx_active == 0u; 3872 log_info("drop fragmented ISO data for closed connection, release buffer %u", release_buffer); 3873 hci_stack->iso_fragmentation_total_size = 0; 3874 hci_stack->iso_fragmentation_pos = 0; 3875 if (release_buffer){ 3876 hci_release_packet_buffer(); 3877 } 3878 } 3879 } 3880 3881 // finalize iso stream if handle matches 3882 iso_stream = hci_iso_stream_for_con_handle(handle); 3883 if (iso_stream != NULL){ 3884 hci_iso_stream_finalize(iso_stream); 3885 break; 3886 } 3887 #endif 3888 3889 conn = hci_connection_for_handle(handle); 3890 if (!conn) break; 3891 #ifdef ENABLE_CLASSIC 3892 // pairing failed if it was ongoing 3893 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3894 #endif 3895 3896 // emit dedicatd bonding event 3897 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3898 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3899 } 3900 3901 // mark connection for shutdown, stop timers, reset state 3902 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3903 hci_connection_stop_timer(conn); 3904 hci_connection_init(conn); 3905 3906 #ifdef ENABLE_BLE 3907 #ifdef ENABLE_LE_PERIPHERAL 3908 // re-enable advertisements for le connections if active 3909 if (hci_is_le_connection(conn)){ 3910 hci_update_advertisements_enabled_for_current_roles(); 3911 } 3912 #endif 3913 #endif 3914 break; 3915 3916 case HCI_EVENT_HARDWARE_ERROR: 3917 log_error("Hardware Error: 0x%02x", packet[2]); 3918 if (hci_stack->hardware_error_callback){ 3919 (*hci_stack->hardware_error_callback)(packet[2]); 3920 } else { 3921 // if no special requests, just reboot stack 3922 hci_power_control_off(); 3923 hci_power_control_on(); 3924 } 3925 break; 3926 3927 #ifdef ENABLE_CLASSIC 3928 case HCI_EVENT_ROLE_CHANGE: 3929 if (packet[2]) break; // status != 0 3930 reverse_bd_addr(&packet[3], addr); 3931 addr_type = BD_ADDR_TYPE_ACL; 3932 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3933 if (!conn) break; 3934 conn->role = packet[9]; 3935 break; 3936 #endif 3937 3938 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3939 // release packet buffer only for asynchronous transport and if there are not further fragments 3940 if (hci_transport_synchronous()) { 3941 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3942 return; // instead of break: to avoid re-entering hci_run() 3943 } 3944 hci_stack->acl_fragmentation_tx_active = 0; 3945 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3946 hci_stack->iso_fragmentation_tx_active = 0; 3947 if (hci_stack->iso_fragmentation_total_size) break; 3948 #endif 3949 if (hci_stack->acl_fragmentation_total_size) break; 3950 hci_release_packet_buffer(); 3951 3952 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3953 hci_iso_notify_can_send_now(); 3954 #endif 3955 // L2CAP receives this event via the hci_emit_event below 3956 3957 #ifdef ENABLE_CLASSIC 3958 // For SCO, we do the can_send_now_check here 3959 hci_notify_if_sco_can_send_now(); 3960 #endif 3961 break; 3962 3963 #ifdef ENABLE_CLASSIC 3964 case HCI_EVENT_SCO_CAN_SEND_NOW: 3965 // For SCO, we do the can_send_now_check here 3966 hci_stack->sco_can_send_now = true; 3967 hci_notify_if_sco_can_send_now(); 3968 return; 3969 3970 // explode inquriy results for easier consumption 3971 case HCI_EVENT_INQUIRY_RESULT: 3972 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3973 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3974 gap_inquiry_explode(packet, size); 3975 break; 3976 #endif 3977 3978 #ifdef ENABLE_BLE 3979 case HCI_EVENT_LE_META: 3980 switch (packet[2]){ 3981 #ifdef ENABLE_LE_CENTRAL 3982 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3983 if (!hci_stack->le_scanning_enabled) break; 3984 le_handle_advertisement_report(packet, size); 3985 break; 3986 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3987 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3988 if (!hci_stack->le_scanning_enabled) break; 3989 le_handle_extended_advertisement_report(packet, size); 3990 break; 3991 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 3992 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 3993 hci_stack->le_periodic_sync_state = LE_CONNECTING_IDLE; 3994 break; 3995 #endif 3996 #endif 3997 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3998 event_handle_le_connection_complete(packet); 3999 break; 4000 4001 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 4002 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 4003 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 4004 conn = hci_connection_for_handle(handle); 4005 if (!conn) break; 4006 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 4007 break; 4008 4009 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 4010 // connection 4011 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 4012 conn = hci_connection_for_handle(handle); 4013 if (conn) { 4014 // read arguments 4015 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 4016 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 4017 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 4018 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 4019 4020 // validate against current connection parameter range 4021 le_connection_parameter_range_t existing_range; 4022 gap_get_connection_parameter_range(&existing_range); 4023 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 4024 if (update_parameter){ 4025 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 4026 conn->le_conn_interval_min = le_conn_interval_min; 4027 conn->le_conn_interval_max = le_conn_interval_max; 4028 conn->le_conn_latency = le_conn_latency; 4029 conn->le_supervision_timeout = le_supervision_timeout; 4030 } else { 4031 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 4032 } 4033 } 4034 break; 4035 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 4036 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 4037 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 4038 conn = hci_connection_for_handle(handle); 4039 if (conn) { 4040 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 4041 } 4042 break; 4043 #endif 4044 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4045 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 4046 if (hci_stack->iso_active_operation_type == HCI_ISO_TYPE_CIS){ 4047 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 4048 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 4049 iso_stream = hci_iso_stream_for_con_handle(handle); 4050 btstack_assert(iso_stream != NULL); 4051 // track SDU 4052 iso_stream->max_sdu_c_to_p = hci_subevent_le_cis_established_get_max_pdu_c_to_p(packet); 4053 iso_stream->max_sdu_p_to_c = hci_subevent_le_cis_established_get_max_pdu_p_to_c(packet); 4054 if (hci_stack->iso_active_operation_group_id == HCI_ISO_GROUP_ID_SINGLE_CIS){ 4055 // CIS Accept by Peripheral 4056 if (status == ERROR_CODE_SUCCESS){ 4057 if (iso_stream->max_sdu_p_to_c > 0){ 4058 // we're peripheral and we will send data 4059 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT; 4060 } else { 4061 // we're peripheral and we will only receive data 4062 iso_stream->state = HCI_ISO_STREAM_STATE_W2_SETUP_ISO_OUTPUT; 4063 } 4064 } else { 4065 hci_iso_stream_finalize(iso_stream); 4066 hci_emit_cis_created(HCI_ISO_GROUP_ID_INVALID, handle, status); 4067 } 4068 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4069 } else { 4070 // CIG Setup by Central 4071 le_audio_cig_t * cig = hci_cig_for_id(hci_stack->iso_active_operation_group_id); 4072 btstack_assert(cig != NULL); 4073 // update iso stream state 4074 if (status == ERROR_CODE_SUCCESS){ 4075 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 4076 } else { 4077 iso_stream->state = HCI_ISO_STREAM_STATE_IDLE; 4078 } 4079 // update cig state 4080 uint8_t i; 4081 for (i=0;i<cig->num_cis;i++){ 4082 if (cig->cis_con_handles[i] == handle){ 4083 cig->cis_setup_active[i] = false; 4084 if (status == ERROR_CODE_SUCCESS){ 4085 cig->cis_setup_active[i] = false; 4086 cig->cis_established[i] = true; 4087 } else { 4088 hci_emit_cis_created(cig->cig_id, handle, status); 4089 } 4090 } 4091 } 4092 4093 // trigger iso path setup if complete 4094 bool setup_active = false; 4095 for (i=0;i<cig->num_cis;i++){ 4096 setup_active |= cig->cis_setup_active[i]; 4097 } 4098 if (setup_active == false){ 4099 cig->state_vars.next_cis = 0; 4100 cig->state = LE_AUDIO_CIG_STATE_SETUP_ISO_PATH; 4101 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4102 } 4103 } 4104 } 4105 break; 4106 case HCI_SUBEVENT_LE_CREATE_BIG_COMPLETE: 4107 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4108 big = hci_big_for_handle(packet[4]); 4109 if (big != NULL){ 4110 uint8_t status = packet[3]; 4111 if (status == ERROR_CODE_SUCCESS){ 4112 // store bis_con_handles and trigger iso path setup 4113 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[20]); 4114 uint8_t i; 4115 for (i=0;i<num_bis;i++){ 4116 hci_con_handle_t bis_handle = (hci_con_handle_t) little_endian_read_16(packet, 21 + (2 * i)); 4117 big->bis_con_handles[i] = bis_handle; 4118 // assign bis handle 4119 btstack_linked_list_iterator_t it; 4120 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 4121 while (btstack_linked_list_iterator_has_next(&it)){ 4122 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 4123 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 4124 (iso_stream->group_id == big->big_handle)){ 4125 iso_stream->con_handle = bis_handle; 4126 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 4127 break; 4128 } 4129 } 4130 } 4131 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4132 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4133 big->state_vars.next_bis = 0; 4134 } 4135 } else { 4136 // create BIG failed or has been stopped by us 4137 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big->big_handle); 4138 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4139 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED){ 4140 hci_emit_big_created(big, status); 4141 } else { 4142 hci_emit_big_terminated(big); 4143 } 4144 } 4145 } 4146 break; 4147 case HCI_SUBEVENT_LE_TERMINATE_BIG_COMPLETE: 4148 big = hci_big_for_handle(hci_subevent_le_terminate_big_complete_get_big_handle(packet)); 4149 if (big != NULL){ 4150 // finalize associated ISO streams 4151 btstack_linked_list_iterator_t it; 4152 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 4153 while (btstack_linked_list_iterator_has_next(&it)){ 4154 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 4155 if (iso_stream->group_id == big->big_handle){ 4156 log_info("BIG Terminated, big_handle 0x%02x, con handle 0x%04x", iso_stream->group_id, iso_stream->con_handle); 4157 btstack_linked_list_iterator_remove(&it); 4158 btstack_memory_hci_iso_stream_free(iso_stream); 4159 } 4160 } 4161 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4162 switch (big->state){ 4163 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 4164 hci_emit_big_created(big, big->state_vars.status); 4165 break; 4166 default: 4167 hci_emit_big_terminated(big); 4168 break; 4169 } 4170 } 4171 break; 4172 case HCI_SUBEVENT_LE_BIG_SYNC_ESTABLISHED: 4173 big_sync = hci_big_sync_for_handle(packet[4]); 4174 if (big_sync != NULL){ 4175 uint8_t status = packet[3]; 4176 uint8_t big_handle = packet[4]; 4177 if (status == ERROR_CODE_SUCCESS){ 4178 // store bis_con_handles and trigger iso path setup 4179 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[16]); 4180 uint8_t i; 4181 for (i=0;i<num_bis;i++){ 4182 big_sync->bis_con_handles[i] = little_endian_read_16(packet, 17 + (2 * i)); 4183 } 4184 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4185 // trigger iso path setup 4186 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4187 big_sync->state_vars.next_bis = 0; 4188 } 4189 } else { 4190 // create BIG Sync failed or has been stopped by us 4191 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4192 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4193 hci_emit_big_sync_created(big_sync, status); 4194 } else { 4195 hci_emit_big_sync_stopped(big_handle); 4196 } 4197 } 4198 } 4199 break; 4200 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 4201 big_sync = hci_big_sync_for_handle(packet[4]); 4202 if (big_sync != NULL){ 4203 uint8_t big_handle = packet[4]; 4204 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4205 hci_emit_big_sync_stopped(big_handle); 4206 } 4207 break; 4208 #endif 4209 default: 4210 break; 4211 } 4212 break; 4213 #endif 4214 case HCI_EVENT_VENDOR_SPECIFIC: 4215 // Vendor specific commands often create vendor specific event instead of num completed packets 4216 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 4217 switch (hci_stack->manufacturer){ 4218 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 4219 hci_stack->num_cmd_packets = 1; 4220 break; 4221 default: 4222 break; 4223 } 4224 break; 4225 default: 4226 break; 4227 } 4228 4229 handle_event_for_current_stack_state(packet, size); 4230 4231 // notify upper stack 4232 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 4233 4234 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 4235 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 4236 handle = little_endian_read_16(packet, 3); 4237 hci_connection_t * aConn = hci_connection_for_handle(handle); 4238 // discard connection if app did not trigger a reconnect in the event handler 4239 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4240 hci_shutdown_connection(aConn); 4241 } 4242 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 4243 hci_controller_dump_packets(); 4244 #endif 4245 } 4246 4247 // execute main loop 4248 hci_run(); 4249 } 4250 4251 #ifdef ENABLE_CLASSIC 4252 4253 #ifdef ENABLE_SCO_OVER_HCI 4254 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 4255 static void sco_schedule_tx(hci_connection_t * conn); 4256 4257 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 4258 log_debug("SCO TX Timeout"); 4259 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 4260 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4261 if (!conn) return; 4262 4263 // trigger send 4264 conn->sco_tx_ready = 1; 4265 // extra packet if CVSD but SCO buffer is too short 4266 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 4267 conn->sco_tx_ready++; 4268 } 4269 hci_notify_if_sco_can_send_now(); 4270 } 4271 4272 4273 #define SCO_TX_AFTER_RX_MS (6) 4274 4275 static void sco_schedule_tx(hci_connection_t * conn){ 4276 4277 uint32_t now = btstack_run_loop_get_time_ms(); 4278 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 4279 int time_delta_ms = sco_tx_ms - now; 4280 4281 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 4282 4283 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 4284 btstack_run_loop_remove_timer(timer); 4285 btstack_run_loop_set_timer(timer, time_delta_ms); 4286 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 4287 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 4288 btstack_run_loop_add_timer(timer); 4289 } 4290 #endif 4291 4292 static void sco_handler(uint8_t * packet, uint16_t size){ 4293 // lookup connection struct 4294 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 4295 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4296 if (!conn) return; 4297 4298 #ifdef ENABLE_SCO_OVER_HCI 4299 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 4300 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 4301 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 4302 packet[2] = 0x3c; 4303 memmove(&packet[3], &packet[23], 63); 4304 size = 63; 4305 } 4306 } 4307 4308 if (hci_have_usb_transport()){ 4309 // Nothing to do 4310 } else { 4311 // 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); 4312 if (hci_stack->synchronous_flow_control_enabled == 0){ 4313 uint32_t now = btstack_run_loop_get_time_ms(); 4314 4315 if (!conn->sco_rx_valid){ 4316 // ignore first 10 packets 4317 conn->sco_rx_count++; 4318 // log_debug("sco rx count %u", conn->sco_rx_count); 4319 if (conn->sco_rx_count == 10) { 4320 // use first timestamp as is and pretent it just started 4321 conn->sco_rx_ms = now; 4322 conn->sco_rx_valid = 1; 4323 conn->sco_rx_count = 0; 4324 sco_schedule_tx(conn); 4325 } 4326 } else { 4327 // track expected arrival timme 4328 conn->sco_rx_count++; 4329 conn->sco_rx_ms += 7; 4330 int delta = (int32_t) (now - conn->sco_rx_ms); 4331 if (delta > 0){ 4332 conn->sco_rx_ms++; 4333 } 4334 // log_debug("sco rx %u", conn->sco_rx_ms); 4335 sco_schedule_tx(conn); 4336 } 4337 } 4338 } 4339 #endif 4340 4341 // deliver to app 4342 if (hci_stack->sco_packet_handler) { 4343 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 4344 } 4345 4346 #ifdef HAVE_SCO_TRANSPORT 4347 // We can send one packet for each received packet 4348 conn->sco_tx_ready++; 4349 hci_notify_if_sco_can_send_now(); 4350 #endif 4351 4352 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4353 conn->num_packets_completed++; 4354 hci_stack->host_completed_packets = 1; 4355 hci_run(); 4356 #endif 4357 } 4358 #endif 4359 4360 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 4361 hci_dump_packet(packet_type, 1, packet, size); 4362 switch (packet_type) { 4363 case HCI_EVENT_PACKET: 4364 event_handler(packet, size); 4365 break; 4366 case HCI_ACL_DATA_PACKET: 4367 acl_handler(packet, size); 4368 break; 4369 #ifdef ENABLE_CLASSIC 4370 case HCI_SCO_DATA_PACKET: 4371 sco_handler(packet, size); 4372 break; 4373 #endif 4374 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4375 case HCI_ISO_DATA_PACKET: 4376 hci_iso_packet_handler(packet, size); 4377 break; 4378 #endif 4379 default: 4380 break; 4381 } 4382 } 4383 4384 /** 4385 * @brief Add event packet handler. 4386 */ 4387 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4388 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4389 } 4390 4391 /** 4392 * @brief Remove event packet handler. 4393 */ 4394 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4395 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4396 } 4397 4398 /** Register HCI packet handlers */ 4399 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 4400 hci_stack->acl_packet_handler = handler; 4401 } 4402 4403 #ifdef ENABLE_CLASSIC 4404 /** 4405 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 4406 */ 4407 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 4408 hci_stack->sco_packet_handler = handler; 4409 } 4410 #endif 4411 4412 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4413 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 4414 hci_stack->iso_packet_handler = handler; 4415 } 4416 #endif 4417 4418 static void hci_state_reset(void){ 4419 // no connections yet 4420 hci_stack->connections = NULL; 4421 4422 // keep discoverable/connectable as this has been requested by the client(s) 4423 // hci_stack->discoverable = 0; 4424 // hci_stack->connectable = 0; 4425 // hci_stack->bondable = 1; 4426 // hci_stack->own_addr_type = 0; 4427 4428 // buffer is free 4429 hci_stack->hci_packet_buffer_reserved = false; 4430 4431 // no pending cmds 4432 hci_stack->decline_reason = 0; 4433 4434 hci_stack->secure_connections_active = false; 4435 4436 #ifdef ENABLE_CLASSIC 4437 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 4438 hci_stack->page_timeout = 0x6000; // ca. 15 sec 4439 4440 hci_stack->gap_tasks_classic = 4441 GAP_TASK_SET_DEFAULT_LINK_POLICY | 4442 GAP_TASK_SET_CLASS_OF_DEVICE | 4443 GAP_TASK_SET_LOCAL_NAME | 4444 GAP_TASK_SET_EIR_DATA | 4445 GAP_TASK_WRITE_SCAN_ENABLE | 4446 GAP_TASK_WRITE_PAGE_TIMEOUT; 4447 #endif 4448 4449 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4450 hci_stack->classic_read_local_oob_data = false; 4451 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 4452 #endif 4453 4454 // LE 4455 #ifdef ENABLE_BLE 4456 memset(hci_stack->le_random_address, 0, 6); 4457 hci_stack->le_random_address_set = 0; 4458 #endif 4459 #ifdef ENABLE_LE_CENTRAL 4460 hci_stack->le_scanning_active = false; 4461 hci_stack->le_scanning_param_update = true; 4462 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4463 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 4464 hci_stack->le_whitelist_capacity = 0; 4465 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4466 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 4467 #endif 4468 #endif 4469 #ifdef ENABLE_LE_PERIPHERAL 4470 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4471 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 4472 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4473 } 4474 if (hci_stack->le_advertisements_data != NULL){ 4475 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4476 } 4477 #endif 4478 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4479 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_INVALID; 4480 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_INVALID; 4481 #endif 4482 } 4483 4484 #ifdef ENABLE_CLASSIC 4485 /** 4486 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4487 */ 4488 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4489 // store and open remote device db 4490 hci_stack->link_key_db = link_key_db; 4491 if (hci_stack->link_key_db) { 4492 hci_stack->link_key_db->open(); 4493 } 4494 } 4495 #endif 4496 4497 void hci_init(const hci_transport_t *transport, const void *config){ 4498 4499 #ifdef HAVE_MALLOC 4500 if (!hci_stack) { 4501 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4502 } 4503 #else 4504 hci_stack = &hci_stack_static; 4505 #endif 4506 memset(hci_stack, 0, sizeof(hci_stack_t)); 4507 4508 // reference to use transport layer implementation 4509 hci_stack->hci_transport = transport; 4510 4511 // reference to used config 4512 hci_stack->config = config; 4513 4514 // setup pointer for outgoing packet buffer 4515 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4516 4517 // max acl payload size defined in config.h 4518 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4519 4520 // register packet handlers with transport 4521 transport->register_packet_handler(&packet_handler); 4522 4523 hci_stack->state = HCI_STATE_OFF; 4524 4525 // class of device 4526 hci_stack->class_of_device = 0x007a020c; // Smartphone 4527 4528 // bondable by default 4529 hci_stack->bondable = 1; 4530 4531 #ifdef ENABLE_CLASSIC 4532 // classic name 4533 hci_stack->local_name = default_classic_name; 4534 4535 // Master slave policy 4536 hci_stack->master_slave_policy = 1; 4537 4538 // Allow Role Switch 4539 hci_stack->allow_role_switch = 1; 4540 4541 // Default / minimum security level = 2 4542 hci_stack->gap_security_level = LEVEL_2; 4543 4544 // Default Security Mode 4 4545 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4546 4547 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4548 hci_stack->gap_required_encyrption_key_size = 7; 4549 4550 // Link Supervision Timeout 4551 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4552 4553 #endif 4554 4555 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4556 hci_stack->ssp_enable = 1; 4557 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4558 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4559 hci_stack->ssp_auto_accept = 1; 4560 4561 // Secure Connections: enable (requires support from Controller) 4562 hci_stack->secure_connections_enable = true; 4563 4564 // voice setting - signed 16 bit pcm data with CVSD over the air 4565 hci_stack->sco_voice_setting = 0x60; 4566 4567 #ifdef ENABLE_LE_CENTRAL 4568 // connection parameter to use for outgoing connections 4569 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4570 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4571 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4572 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4573 hci_stack->le_connection_latency = 4; // 4 4574 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4575 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4576 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4577 4578 // default LE Scanning 4579 hci_stack->le_scan_type = 0x1; // active 4580 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4581 hci_stack->le_scan_window = 0x30; // 30 ms 4582 #endif 4583 4584 #ifdef ENABLE_LE_PERIPHERAL 4585 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4586 #endif 4587 4588 // connection parameter range used to answer connection parameter update requests in l2cap 4589 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4590 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4591 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4592 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4593 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4594 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4595 4596 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4597 hci_stack->iso_packets_to_queue = 1; 4598 #endif 4599 4600 hci_state_reset(); 4601 } 4602 4603 void hci_deinit(void){ 4604 btstack_run_loop_remove_timer(&hci_stack->timeout); 4605 #ifdef HAVE_MALLOC 4606 if (hci_stack) { 4607 free(hci_stack); 4608 } 4609 #endif 4610 hci_stack = NULL; 4611 4612 #ifdef ENABLE_CLASSIC 4613 disable_l2cap_timeouts = 0; 4614 #endif 4615 } 4616 4617 /** 4618 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4619 */ 4620 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4621 hci_stack->chipset = chipset_driver; 4622 4623 // reset chipset driver - init is also called on power_up 4624 if (hci_stack->chipset && hci_stack->chipset->init){ 4625 hci_stack->chipset->init(hci_stack->config); 4626 } 4627 } 4628 4629 /** 4630 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4631 */ 4632 void hci_set_control(const btstack_control_t *hardware_control){ 4633 // references to used control implementation 4634 hci_stack->control = hardware_control; 4635 // init with transport config 4636 hardware_control->init(hci_stack->config); 4637 } 4638 4639 static void hci_discard_connections(void){ 4640 btstack_linked_list_iterator_t it; 4641 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4642 while (btstack_linked_list_iterator_has_next(&it)){ 4643 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4644 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4645 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4646 hci_shutdown_connection(connection); 4647 } 4648 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4649 while (hci_stack->iso_streams != NULL){ 4650 hci_iso_stream_finalize((hci_iso_stream_t *) hci_stack->iso_streams); 4651 } 4652 #endif 4653 } 4654 4655 void hci_close(void){ 4656 4657 #ifdef ENABLE_CLASSIC 4658 // close remote device db 4659 if (hci_stack->link_key_db) { 4660 hci_stack->link_key_db->close(); 4661 } 4662 #endif 4663 4664 hci_discard_connections(); 4665 4666 hci_power_control(HCI_POWER_OFF); 4667 4668 #ifdef HAVE_MALLOC 4669 free(hci_stack); 4670 #endif 4671 hci_stack = NULL; 4672 } 4673 4674 #ifdef HAVE_SCO_TRANSPORT 4675 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4676 hci_stack->sco_transport = sco_transport; 4677 sco_transport->register_packet_handler(&packet_handler); 4678 } 4679 #endif 4680 4681 #ifdef ENABLE_CLASSIC 4682 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4683 // validate ranage and set 4684 if (encryption_key_size < 7) return; 4685 if (encryption_key_size > 16) return; 4686 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4687 } 4688 4689 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4690 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4691 hci_stack->gap_security_mode = security_mode; 4692 return ERROR_CODE_SUCCESS; 4693 } else { 4694 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4695 } 4696 } 4697 4698 gap_security_mode_t gap_get_security_mode(void){ 4699 return hci_stack->gap_security_mode; 4700 } 4701 4702 void gap_set_security_level(gap_security_level_t security_level){ 4703 hci_stack->gap_security_level = security_level; 4704 } 4705 4706 gap_security_level_t gap_get_security_level(void){ 4707 if (hci_stack->gap_secure_connections_only_mode){ 4708 return LEVEL_4; 4709 } 4710 return hci_stack->gap_security_level; 4711 } 4712 4713 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4714 hci_stack->gap_minimal_service_security_level = security_level; 4715 } 4716 4717 void gap_set_secure_connections_only_mode(bool enable){ 4718 hci_stack->gap_secure_connections_only_mode = enable; 4719 } 4720 4721 bool gap_get_secure_connections_only_mode(void){ 4722 return hci_stack->gap_secure_connections_only_mode; 4723 } 4724 #endif 4725 4726 #ifdef ENABLE_CLASSIC 4727 void gap_set_class_of_device(uint32_t class_of_device){ 4728 hci_stack->class_of_device = class_of_device; 4729 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4730 hci_run(); 4731 } 4732 4733 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4734 hci_stack->default_link_policy_settings = default_link_policy_settings; 4735 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4736 hci_run(); 4737 } 4738 4739 void gap_set_allow_role_switch(bool allow_role_switch){ 4740 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4741 } 4742 4743 uint8_t hci_get_allow_role_switch(void){ 4744 return hci_stack->allow_role_switch; 4745 } 4746 4747 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4748 hci_stack->link_supervision_timeout = link_supervision_timeout; 4749 } 4750 4751 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4752 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4753 } 4754 4755 uint16_t hci_automatic_flush_timeout(void){ 4756 return hci_stack->automatic_flush_timeout; 4757 } 4758 4759 void hci_disable_l2cap_timeout_check(void){ 4760 disable_l2cap_timeouts = 1; 4761 } 4762 #endif 4763 4764 #ifndef HAVE_HOST_CONTROLLER_API 4765 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4766 void hci_set_bd_addr(bd_addr_t addr){ 4767 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4768 hci_stack->custom_bd_addr_set = 1; 4769 } 4770 #endif 4771 4772 // State-Module-Driver overview 4773 // state module low-level 4774 // HCI_STATE_OFF off close 4775 // HCI_STATE_INITIALIZING, on open 4776 // HCI_STATE_WORKING, on open 4777 // HCI_STATE_HALTING, on open 4778 // HCI_STATE_SLEEPING, off/sleep close 4779 // HCI_STATE_FALLING_ASLEEP on open 4780 4781 static int hci_power_control_on(void){ 4782 4783 // power on 4784 int err = 0; 4785 if (hci_stack->control && hci_stack->control->on){ 4786 err = (*hci_stack->control->on)(); 4787 } 4788 if (err){ 4789 log_error( "POWER_ON failed"); 4790 hci_emit_hci_open_failed(); 4791 return err; 4792 } 4793 4794 // int chipset driver 4795 if (hci_stack->chipset && hci_stack->chipset->init){ 4796 hci_stack->chipset->init(hci_stack->config); 4797 } 4798 4799 // init transport 4800 if (hci_stack->hci_transport->init){ 4801 hci_stack->hci_transport->init(hci_stack->config); 4802 } 4803 4804 // open transport 4805 err = hci_stack->hci_transport->open(); 4806 if (err){ 4807 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4808 if (hci_stack->control && hci_stack->control->off){ 4809 (*hci_stack->control->off)(); 4810 } 4811 hci_emit_hci_open_failed(); 4812 return err; 4813 } 4814 return 0; 4815 } 4816 4817 static void hci_power_control_off(void){ 4818 4819 log_info("hci_power_control_off"); 4820 4821 // close low-level device 4822 hci_stack->hci_transport->close(); 4823 4824 log_info("hci_power_control_off - hci_transport closed"); 4825 4826 // power off 4827 if (hci_stack->control && hci_stack->control->off){ 4828 (*hci_stack->control->off)(); 4829 } 4830 4831 log_info("hci_power_control_off - control closed"); 4832 4833 hci_stack->state = HCI_STATE_OFF; 4834 } 4835 4836 static void hci_power_control_sleep(void){ 4837 4838 log_info("hci_power_control_sleep"); 4839 4840 #if 0 4841 // don't close serial port during sleep 4842 4843 // close low-level device 4844 hci_stack->hci_transport->close(hci_stack->config); 4845 #endif 4846 4847 // sleep mode 4848 if (hci_stack->control && hci_stack->control->sleep){ 4849 (*hci_stack->control->sleep)(); 4850 } 4851 4852 hci_stack->state = HCI_STATE_SLEEPING; 4853 } 4854 4855 static int hci_power_control_wake(void){ 4856 4857 log_info("hci_power_control_wake"); 4858 4859 // wake on 4860 if (hci_stack->control && hci_stack->control->wake){ 4861 (*hci_stack->control->wake)(); 4862 } 4863 4864 #if 0 4865 // open low-level device 4866 int err = hci_stack->hci_transport->open(hci_stack->config); 4867 if (err){ 4868 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4869 if (hci_stack->control && hci_stack->control->off){ 4870 (*hci_stack->control->off)(); 4871 } 4872 hci_emit_hci_open_failed(); 4873 return err; 4874 } 4875 #endif 4876 4877 return 0; 4878 } 4879 4880 static void hci_power_enter_initializing_state(void){ 4881 // set up state machine 4882 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4883 hci_stack->hci_packet_buffer_reserved = false; 4884 hci_stack->state = HCI_STATE_INITIALIZING; 4885 hci_stack->substate = HCI_INIT_SEND_RESET; 4886 } 4887 4888 static void hci_power_enter_halting_state(void){ 4889 #ifdef ENABLE_BLE 4890 hci_whitelist_free(); 4891 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4892 hci_periodic_advertiser_list_free(); 4893 #endif 4894 #endif 4895 // see hci_run 4896 hci_stack->state = HCI_STATE_HALTING; 4897 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4898 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4899 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4900 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4901 btstack_run_loop_add_timer(&hci_stack->timeout); 4902 } 4903 4904 // returns error 4905 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4906 int err; 4907 switch (power_mode){ 4908 case HCI_POWER_ON: 4909 err = hci_power_control_on(); 4910 if (err != 0) { 4911 log_error("hci_power_control_on() error %d", err); 4912 return err; 4913 } 4914 hci_power_enter_initializing_state(); 4915 break; 4916 case HCI_POWER_OFF: 4917 // do nothing 4918 break; 4919 case HCI_POWER_SLEEP: 4920 // do nothing (with SLEEP == OFF) 4921 break; 4922 default: 4923 btstack_assert(false); 4924 break; 4925 } 4926 return ERROR_CODE_SUCCESS; 4927 } 4928 4929 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4930 switch (power_mode){ 4931 case HCI_POWER_ON: 4932 // do nothing 4933 break; 4934 case HCI_POWER_OFF: 4935 // no connections yet, just turn it off 4936 hci_power_control_off(); 4937 break; 4938 case HCI_POWER_SLEEP: 4939 // no connections yet, just turn it off 4940 hci_power_control_sleep(); 4941 break; 4942 default: 4943 btstack_assert(false); 4944 break; 4945 } 4946 return ERROR_CODE_SUCCESS; 4947 } 4948 4949 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4950 switch (power_mode){ 4951 case HCI_POWER_ON: 4952 // do nothing 4953 break; 4954 case HCI_POWER_OFF: 4955 hci_power_enter_halting_state(); 4956 break; 4957 case HCI_POWER_SLEEP: 4958 // see hci_run 4959 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4960 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4961 break; 4962 default: 4963 btstack_assert(false); 4964 break; 4965 } 4966 return ERROR_CODE_SUCCESS; 4967 } 4968 4969 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4970 switch (power_mode){ 4971 case HCI_POWER_ON: 4972 hci_power_enter_initializing_state(); 4973 break; 4974 case HCI_POWER_OFF: 4975 // do nothing 4976 break; 4977 case HCI_POWER_SLEEP: 4978 // see hci_run 4979 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4980 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4981 break; 4982 default: 4983 btstack_assert(false); 4984 break; 4985 } 4986 return ERROR_CODE_SUCCESS; 4987 } 4988 4989 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4990 switch (power_mode){ 4991 case HCI_POWER_ON: 4992 hci_power_enter_initializing_state(); 4993 break; 4994 case HCI_POWER_OFF: 4995 hci_power_enter_halting_state(); 4996 break; 4997 case HCI_POWER_SLEEP: 4998 // do nothing 4999 break; 5000 default: 5001 btstack_assert(false); 5002 break; 5003 } 5004 return ERROR_CODE_SUCCESS; 5005 } 5006 5007 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 5008 int err; 5009 switch (power_mode){ 5010 case HCI_POWER_ON: 5011 err = hci_power_control_wake(); 5012 if (err) return err; 5013 hci_power_enter_initializing_state(); 5014 break; 5015 case HCI_POWER_OFF: 5016 hci_power_enter_halting_state(); 5017 break; 5018 case HCI_POWER_SLEEP: 5019 // do nothing 5020 break; 5021 default: 5022 btstack_assert(false); 5023 break; 5024 } 5025 return ERROR_CODE_SUCCESS; 5026 } 5027 5028 int hci_power_control(HCI_POWER_MODE power_mode){ 5029 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 5030 btstack_run_loop_remove_timer(&hci_stack->timeout); 5031 int err = 0; 5032 switch (hci_stack->state){ 5033 case HCI_STATE_OFF: 5034 err = hci_power_control_state_off(power_mode); 5035 break; 5036 case HCI_STATE_INITIALIZING: 5037 err = hci_power_control_state_initializing(power_mode); 5038 break; 5039 case HCI_STATE_WORKING: 5040 err = hci_power_control_state_working(power_mode); 5041 break; 5042 case HCI_STATE_HALTING: 5043 err = hci_power_control_state_halting(power_mode); 5044 break; 5045 case HCI_STATE_FALLING_ASLEEP: 5046 err = hci_power_control_state_falling_asleep(power_mode); 5047 break; 5048 case HCI_STATE_SLEEPING: 5049 err = hci_power_control_state_sleeping(power_mode); 5050 break; 5051 default: 5052 btstack_assert(false); 5053 break; 5054 } 5055 if (err != 0){ 5056 return err; 5057 } 5058 5059 // create internal event 5060 hci_emit_state(); 5061 5062 // trigger next/first action 5063 hci_run(); 5064 5065 return 0; 5066 } 5067 5068 5069 static void hci_halting_run(void) { 5070 5071 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5072 5073 hci_connection_t *connection; 5074 #ifdef ENABLE_BLE 5075 #ifdef ENABLE_LE_PERIPHERAL 5076 bool stop_advertismenets; 5077 #endif 5078 #endif 5079 5080 switch (hci_stack->substate) { 5081 case HCI_HALTING_CLASSIC_STOP: 5082 #ifdef ENABLE_CLASSIC 5083 if (!hci_can_send_command_packet_now()) return; 5084 5085 if (hci_stack->connectable || hci_stack->discoverable){ 5086 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 5087 hci_send_cmd(&hci_write_scan_enable, 0); 5088 return; 5089 } 5090 #endif 5091 /* fall through */ 5092 5093 case HCI_HALTING_LE_ADV_STOP: 5094 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 5095 5096 #ifdef ENABLE_BLE 5097 #ifdef ENABLE_LE_PERIPHERAL 5098 if (!hci_can_send_command_packet_now()) return; 5099 5100 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 5101 5102 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5103 if (hci_extended_advertising_supported()){ 5104 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5105 btstack_linked_list_iterator_t it; 5106 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5107 // stop all periodic advertisements and check if an extended set is active 5108 while (btstack_linked_list_iterator_has_next(&it)){ 5109 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5110 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5111 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5112 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 5113 return; 5114 } 5115 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5116 stop_advertismenets = true; 5117 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5118 } 5119 } 5120 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5121 if (stop_advertismenets){ 5122 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5123 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 5124 return; 5125 } 5126 } 5127 else 5128 #else /* ENABLE_LE_PERIPHERAL */ 5129 { 5130 if (stop_advertismenets) { 5131 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5132 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5133 return; 5134 } 5135 } 5136 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 5137 #endif /* ENABLE_LE_PERIPHERAL */ 5138 #endif /* ENABLE_BLE */ 5139 5140 /* fall through */ 5141 5142 case HCI_HALTING_LE_SCAN_STOP: 5143 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 5144 if (!hci_can_send_command_packet_now()) return; 5145 5146 #ifdef ENABLE_BLE 5147 #ifdef ENABLE_LE_CENTRAL 5148 if (hci_stack->le_scanning_active){ 5149 hci_le_scan_stop(); 5150 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 5151 return; 5152 } 5153 #endif 5154 #endif 5155 5156 /* fall through */ 5157 5158 case HCI_HALTING_DISCONNECT_ALL: 5159 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 5160 if (!hci_can_send_command_packet_now()) return; 5161 5162 // close all open connections 5163 connection = (hci_connection_t *) hci_stack->connections; 5164 if (connection) { 5165 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5166 5167 // check state 5168 if (connection->state == SENT_DISCONNECT) return; 5169 connection->state = SENT_DISCONNECT; 5170 5171 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5172 5173 // finally, send the disconnect command 5174 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5175 return; 5176 } 5177 5178 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5179 // stop BIGs and BIG Syncs 5180 if (hci_stack->le_audio_bigs != NULL){ 5181 le_audio_big_t * big = (le_audio_big_t*) hci_stack->le_audio_bigs; 5182 if (big->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5183 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5184 hci_send_cmd(&hci_le_terminate_big, big->big_handle); 5185 return; 5186 } 5187 if (hci_stack->le_audio_big_syncs != NULL){ 5188 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t*) hci_stack->le_audio_big_syncs; 5189 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5190 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5191 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 5192 return; 5193 } 5194 #endif 5195 5196 btstack_run_loop_remove_timer(&hci_stack->timeout); 5197 5198 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5199 log_info("HCI_STATE_HALTING: wait 50 ms"); 5200 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 5201 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5202 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5203 btstack_run_loop_add_timer(&hci_stack->timeout); 5204 break; 5205 5206 case HCI_HALTING_CLOSE: 5207 // close left over connections (that had not been properly closed before) 5208 hci_discard_connections(); 5209 5210 log_info("HCI_STATE_HALTING, calling off"); 5211 5212 // switch mode 5213 hci_power_control_off(); 5214 5215 log_info("HCI_STATE_HALTING, emitting state"); 5216 hci_emit_state(); 5217 log_info("HCI_STATE_HALTING, done"); 5218 break; 5219 5220 case HCI_HALTING_W4_CLOSE_TIMER: 5221 // keep waiting 5222 5223 break; 5224 default: 5225 break; 5226 } 5227 }; 5228 5229 static void hci_falling_asleep_run(void){ 5230 hci_connection_t * connection; 5231 switch(hci_stack->substate) { 5232 case HCI_FALLING_ASLEEP_DISCONNECT: 5233 log_info("HCI_STATE_FALLING_ASLEEP"); 5234 // close all open connections 5235 connection = (hci_connection_t *) hci_stack->connections; 5236 if (connection){ 5237 5238 // send disconnect 5239 if (!hci_can_send_command_packet_now()) return; 5240 5241 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5242 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5243 5244 // send disconnected event right away - causes higher layer connections to get closed, too. 5245 hci_shutdown_connection(connection); 5246 return; 5247 } 5248 5249 if (hci_classic_supported()){ 5250 // disable page and inquiry scan 5251 if (!hci_can_send_command_packet_now()) return; 5252 5253 log_info("HCI_STATE_HALTING, disabling inq scans"); 5254 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5255 5256 // continue in next sub state 5257 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5258 break; 5259 } 5260 5261 /* fall through */ 5262 5263 case HCI_FALLING_ASLEEP_COMPLETE: 5264 log_info("HCI_STATE_HALTING, calling sleep"); 5265 // switch mode 5266 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5267 hci_emit_state(); 5268 break; 5269 5270 default: 5271 break; 5272 } 5273 } 5274 5275 #ifdef ENABLE_CLASSIC 5276 5277 static void hci_update_scan_enable(void){ 5278 // 2 = page scan, 1 = inq scan 5279 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 5280 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 5281 hci_run(); 5282 } 5283 5284 void gap_discoverable_control(uint8_t enable){ 5285 if (enable) enable = 1; // normalize argument 5286 5287 if (hci_stack->discoverable == enable){ 5288 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 5289 return; 5290 } 5291 5292 hci_stack->discoverable = enable; 5293 hci_update_scan_enable(); 5294 } 5295 5296 void gap_connectable_control(uint8_t enable){ 5297 if (enable) enable = 1; // normalize argument 5298 5299 // don't emit event 5300 if (hci_stack->connectable == enable) return; 5301 5302 hci_stack->connectable = enable; 5303 hci_update_scan_enable(); 5304 } 5305 #endif 5306 5307 void gap_local_bd_addr(bd_addr_t address_buffer){ 5308 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 5309 } 5310 5311 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5312 static void hci_host_num_completed_packets(void){ 5313 5314 // create packet manually as arrays are not supported and num_commands should not get reduced 5315 hci_reserve_packet_buffer(); 5316 uint8_t * packet = hci_get_outgoing_packet_buffer(); 5317 5318 uint16_t size = 0; 5319 uint16_t num_handles = 0; 5320 packet[size++] = 0x35; 5321 packet[size++] = 0x0c; 5322 size++; // skip param len 5323 size++; // skip num handles 5324 5325 // add { handle, packets } entries 5326 btstack_linked_item_t * it; 5327 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 5328 hci_connection_t * connection = (hci_connection_t *) it; 5329 if (connection->num_packets_completed){ 5330 little_endian_store_16(packet, size, connection->con_handle); 5331 size += 2; 5332 little_endian_store_16(packet, size, connection->num_packets_completed); 5333 size += 2; 5334 // 5335 num_handles++; 5336 connection->num_packets_completed = 0; 5337 } 5338 } 5339 5340 packet[2] = size - 3; 5341 packet[3] = num_handles; 5342 5343 hci_stack->host_completed_packets = 0; 5344 5345 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5346 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5347 5348 // release packet buffer for synchronous transport implementations 5349 if (hci_transport_synchronous()){ 5350 hci_release_packet_buffer(); 5351 hci_emit_transport_packet_sent(); 5352 } 5353 } 5354 #endif 5355 5356 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 5357 UNUSED(ds); 5358 hci_stack->substate = HCI_HALTING_CLOSE; 5359 // allow packet handlers to defer final shutdown 5360 hci_emit_state(); 5361 hci_run(); 5362 } 5363 5364 static bool hci_run_acl_fragments(void){ 5365 if (hci_stack->acl_fragmentation_total_size > 0u) { 5366 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 5367 hci_connection_t *connection = hci_connection_for_handle(con_handle); 5368 if (connection) { 5369 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 5370 hci_send_acl_packet_fragments(connection); 5371 return true; 5372 } 5373 } else { 5374 // connection gone -> discard further fragments 5375 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 5376 hci_stack->acl_fragmentation_total_size = 0; 5377 hci_stack->acl_fragmentation_pos = 0; 5378 } 5379 } 5380 return false; 5381 } 5382 5383 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5384 static bool hci_run_iso_fragments(void){ 5385 if (hci_stack->iso_fragmentation_total_size > 0u) { 5386 // TODO: flow control 5387 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 5388 hci_send_iso_packet_fragments(); 5389 return true; 5390 } 5391 } 5392 return false; 5393 } 5394 #endif 5395 5396 #ifdef ENABLE_CLASSIC 5397 5398 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5399 static bool hci_classic_operation_active(void) { 5400 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 5401 return true; 5402 } 5403 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 5404 return true; 5405 } 5406 btstack_linked_item_t * it; 5407 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 5408 hci_connection_t *connection = (hci_connection_t *) it; 5409 switch (connection->state) { 5410 case SENT_CREATE_CONNECTION: 5411 case SENT_CANCEL_CONNECTION: 5412 case SENT_DISCONNECT: 5413 return true; 5414 default: 5415 break; 5416 } 5417 } 5418 return false; 5419 } 5420 #endif 5421 5422 static bool hci_run_general_gap_classic(void){ 5423 5424 // assert stack is working and classic is active 5425 if (hci_classic_supported() == false) return false; 5426 if (hci_stack->state != HCI_STATE_WORKING) return false; 5427 5428 // decline incoming connections 5429 if (hci_stack->decline_reason){ 5430 uint8_t reason = hci_stack->decline_reason; 5431 hci_stack->decline_reason = 0; 5432 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 5433 return true; 5434 } 5435 5436 if (hci_stack->gap_tasks_classic != 0){ 5437 hci_run_gap_tasks_classic(); 5438 return true; 5439 } 5440 5441 // start/stop inquiry 5442 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 5443 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5444 if (hci_classic_operation_active() == false) 5445 #endif 5446 { 5447 uint8_t duration = hci_stack->inquiry_state; 5448 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 5449 if (hci_stack->inquiry_max_period_length != 0){ 5450 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); 5451 } else { 5452 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 5453 } 5454 return true; 5455 } 5456 } 5457 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 5458 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5459 hci_send_cmd(&hci_inquiry_cancel); 5460 return true; 5461 } 5462 5463 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 5464 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5465 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 5466 return true; 5467 } 5468 5469 // remote name request 5470 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 5471 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5472 if (hci_classic_operation_active() == false) 5473 #endif 5474 { 5475 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 5476 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 5477 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 5478 return true; 5479 } 5480 } 5481 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5482 // Local OOB data 5483 if (hci_stack->classic_read_local_oob_data){ 5484 hci_stack->classic_read_local_oob_data = false; 5485 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 5486 hci_send_cmd(&hci_read_local_extended_oob_data); 5487 } else { 5488 hci_send_cmd(&hci_read_local_oob_data); 5489 } 5490 } 5491 #endif 5492 // pairing 5493 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 5494 uint8_t state = hci_stack->gap_pairing_state; 5495 uint8_t pin_code[16]; 5496 switch (state){ 5497 case GAP_PAIRING_STATE_SEND_PIN: 5498 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5499 memset(pin_code, 0, 16); 5500 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 5501 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 5502 break; 5503 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 5504 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5505 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 5506 break; 5507 case GAP_PAIRING_STATE_SEND_PASSKEY: 5508 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5509 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 5510 break; 5511 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5512 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5513 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5514 break; 5515 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5516 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5517 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5518 break; 5519 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5520 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5521 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5522 break; 5523 default: 5524 break; 5525 } 5526 return true; 5527 } 5528 return false; 5529 } 5530 #endif 5531 5532 #ifdef ENABLE_BLE 5533 5534 #ifdef ENABLE_LE_CENTRAL 5535 static void hci_le_scan_stop(void){ 5536 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5537 if (hci_extended_advertising_supported()) { 5538 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5539 } else 5540 #endif 5541 { 5542 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5543 } 5544 } 5545 #endif 5546 5547 #ifdef ENABLE_LE_PERIPHERAL 5548 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5549 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5550 uint8_t operation = 0; 5551 if (pos == 0){ 5552 // first fragment or complete data 5553 operation |= 1; 5554 } 5555 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5556 // last fragment or complete data 5557 operation |= 2; 5558 } 5559 return operation; 5560 } 5561 #endif 5562 #endif 5563 5564 static bool hci_run_general_gap_le(void){ 5565 5566 btstack_linked_list_iterator_t lit; 5567 5568 // Phase 1: collect what to stop 5569 5570 #ifdef ENABLE_LE_CENTRAL 5571 bool scanning_stop = false; 5572 bool connecting_stop = false; 5573 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5574 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5575 bool periodic_sync_stop = false; 5576 #endif 5577 #endif 5578 #endif 5579 5580 #ifdef ENABLE_LE_PERIPHERAL 5581 bool advertising_stop = false; 5582 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5583 le_advertising_set_t * advertising_stop_set = NULL; 5584 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5585 bool periodic_advertising_stop = false; 5586 #endif 5587 #endif 5588 #endif 5589 5590 // check if own address changes 5591 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5592 5593 // check if whitelist needs modification 5594 bool whitelist_modification_pending = false; 5595 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5596 while (btstack_linked_list_iterator_has_next(&lit)){ 5597 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5598 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5599 whitelist_modification_pending = true; 5600 break; 5601 } 5602 } 5603 5604 // check if resolving list needs modification 5605 bool resolving_list_modification_pending = false; 5606 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5607 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5608 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5609 resolving_list_modification_pending = true; 5610 } 5611 #endif 5612 5613 #ifdef ENABLE_LE_CENTRAL 5614 5615 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5616 // check if periodic advertiser list needs modification 5617 bool periodic_list_modification_pending = false; 5618 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5619 while (btstack_linked_list_iterator_has_next(&lit)){ 5620 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5621 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5622 periodic_list_modification_pending = true; 5623 break; 5624 } 5625 } 5626 #endif 5627 5628 // scanning control 5629 if (hci_stack->le_scanning_active) { 5630 // stop if: 5631 // - parameter change required 5632 // - it's disabled 5633 // - whitelist change required but used for scanning 5634 // - resolving list modified 5635 // - own address changes 5636 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5637 if ((hci_stack->le_scanning_param_update) || 5638 !hci_stack->le_scanning_enabled || 5639 (scanning_uses_whitelist && whitelist_modification_pending) || 5640 resolving_list_modification_pending || 5641 random_address_change){ 5642 5643 scanning_stop = true; 5644 } 5645 } 5646 5647 // connecting control 5648 bool connecting_with_whitelist; 5649 switch (hci_stack->le_connecting_state){ 5650 case LE_CONNECTING_DIRECT: 5651 case LE_CONNECTING_WHITELIST: 5652 // stop connecting if: 5653 // - connecting uses white and whitelist modification pending 5654 // - if it got disabled 5655 // - resolving list modified 5656 // - own address changes 5657 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5658 if ((connecting_with_whitelist && whitelist_modification_pending) || 5659 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5660 resolving_list_modification_pending || 5661 random_address_change) { 5662 5663 connecting_stop = true; 5664 } 5665 break; 5666 default: 5667 break; 5668 } 5669 5670 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5671 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5672 // periodic sync control 5673 bool sync_with_advertiser_list; 5674 switch(hci_stack->le_periodic_sync_state){ 5675 case LE_CONNECTING_DIRECT: 5676 case LE_CONNECTING_WHITELIST: 5677 // stop sync if: 5678 // - sync with advertiser list and advertiser list modification pending 5679 // - if it got disabled 5680 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5681 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5682 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5683 periodic_sync_stop = true; 5684 } 5685 break; 5686 default: 5687 break; 5688 } 5689 #endif 5690 #endif 5691 5692 #endif /* ENABLE_LE_CENTRAL */ 5693 5694 #ifdef ENABLE_LE_PERIPHERAL 5695 // le advertisement control 5696 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5697 // stop if: 5698 // - parameter change required 5699 // - random address used in advertising and changes 5700 // - it's disabled 5701 // - whitelist change required but used for advertisement filter policy 5702 // - resolving list modified 5703 // - own address changes 5704 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5705 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5706 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5707 if (advertising_change || 5708 (advertising_uses_random_address && random_address_change) || 5709 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5710 (advertising_uses_whitelist && whitelist_modification_pending) || 5711 resolving_list_modification_pending || 5712 random_address_change) { 5713 5714 advertising_stop = true; 5715 } 5716 } 5717 5718 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5719 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5720 btstack_linked_list_iterator_t it; 5721 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5722 while (btstack_linked_list_iterator_has_next(&it)){ 5723 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5724 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5725 // stop if: 5726 // - parameter change required 5727 // - random address used in connectable advertising and changes 5728 // - it's disabled 5729 // - whitelist change required but used for advertisement filter policy 5730 // - resolving list modified 5731 // - own address changes 5732 // - advertisement set will be removed 5733 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5734 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5735 bool advertising_uses_random_address = 5736 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5737 advertising_connectable; 5738 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5739 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5740 bool advertising_set_random_address_change = 5741 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5742 bool advertising_set_will_be_removed = 5743 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5744 if (advertising_parameter_change || 5745 (advertising_uses_random_address && advertising_set_random_address_change) || 5746 (advertising_enabled == false) || 5747 (advertising_uses_whitelist && whitelist_modification_pending) || 5748 resolving_list_modification_pending || 5749 advertising_set_will_be_removed) { 5750 5751 advertising_stop = true; 5752 advertising_stop_set = advertising_set; 5753 break; 5754 } 5755 } 5756 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5757 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5758 // stop if: 5759 // - it's disabled 5760 // - parameter change required 5761 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5762 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5763 if ((periodic_enabled == false) || periodic_parameter_change){ 5764 periodic_advertising_stop = true; 5765 advertising_stop_set = advertising_set; 5766 } 5767 } 5768 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5769 } 5770 } 5771 #endif 5772 5773 #endif 5774 5775 5776 // Phase 2: stop everything that should be off during modifications 5777 5778 5779 // 2.1 Outgoing connection 5780 #ifdef ENABLE_LE_CENTRAL 5781 if (connecting_stop){ 5782 hci_send_cmd(&hci_le_create_connection_cancel); 5783 return true; 5784 } 5785 #endif 5786 5787 // 2.2 Scanning 5788 #ifdef ENABLE_LE_CENTRAL 5789 if (scanning_stop){ 5790 hci_stack->le_scanning_active = false; 5791 hci_le_scan_stop(); 5792 return true; 5793 } 5794 5795 // 2.3 Periodic Sync 5796 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5797 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5798 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5799 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5800 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5801 return true; 5802 } 5803 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5804 if (periodic_sync_stop){ 5805 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5806 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5807 return true; 5808 } 5809 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5810 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5811 #endif /* ENABLE_LE_CENTRAL */ 5812 5813 // 2.4 Advertising: legacy, extended, periodic 5814 #ifdef ENABLE_LE_PERIPHERAL 5815 if (advertising_stop){ 5816 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5817 if (hci_extended_advertising_supported()) { 5818 uint8_t advertising_stop_handle; 5819 if (advertising_stop_set != NULL){ 5820 advertising_stop_handle = advertising_stop_set->advertising_handle; 5821 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5822 } else { 5823 advertising_stop_handle = 0; 5824 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5825 } 5826 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5827 const uint16_t durations[] = { 0 }; 5828 const uint16_t max_events[] = { 0 }; 5829 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5830 } else 5831 #endif 5832 { 5833 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5834 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5835 } 5836 return true; 5837 } 5838 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5839 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5840 if (periodic_advertising_stop){ 5841 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5842 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5843 return true; 5844 } 5845 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5846 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5847 #endif /* ENABLE_LE_PERIPHERAL */ 5848 5849 5850 // Phase 3: modify 5851 5852 if (random_address_change){ 5853 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5854 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5855 if (hci_extended_advertising_supported()) { 5856 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5857 } 5858 #endif 5859 { 5860 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5861 } 5862 return true; 5863 } 5864 5865 #ifdef ENABLE_LE_CENTRAL 5866 if (hci_stack->le_scanning_param_update){ 5867 hci_stack->le_scanning_param_update = false; 5868 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5869 if (hci_extended_advertising_supported()){ 5870 // prepare arrays for all PHYs 5871 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5872 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5873 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5874 uint8_t scanning_phys = 1; // LE 1M PHY 5875 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5876 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5877 } else 5878 #endif 5879 { 5880 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5881 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5882 } 5883 return true; 5884 } 5885 #endif 5886 5887 #ifdef ENABLE_LE_PERIPHERAL 5888 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5889 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5890 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5891 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5892 if (hci_extended_advertising_supported()){ 5893 // map advertisment type to advertising event properties 5894 uint16_t adv_event_properties = 0; 5895 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5896 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5897 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5898 } 5899 hci_stack->le_advertising_set_in_current_command = 0; 5900 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5901 0, 5902 adv_event_properties, 5903 hci_stack->le_advertisements_interval_min, 5904 hci_stack->le_advertisements_interval_max, 5905 hci_stack->le_advertisements_channel_map, 5906 hci_stack->le_advertisements_own_addr_type, 5907 hci_stack->le_advertisements_direct_address_type, 5908 hci_stack->le_advertisements_direct_address, 5909 hci_stack->le_advertisements_filter_policy, 5910 0x7f, // tx power: no preference 5911 0x01, // primary adv phy: LE 1M 5912 0, // secondary adv max skip 5913 0, // secondary adv phy 5914 0, // adv sid 5915 0 // scan request notification 5916 ); 5917 } 5918 #endif 5919 { 5920 hci_send_cmd(&hci_le_set_advertising_parameters, 5921 hci_stack->le_advertisements_interval_min, 5922 hci_stack->le_advertisements_interval_max, 5923 hci_stack->le_advertisements_type, 5924 hci_stack->le_advertisements_own_addr_type, 5925 hci_stack->le_advertisements_direct_address_type, 5926 hci_stack->le_advertisements_direct_address, 5927 hci_stack->le_advertisements_channel_map, 5928 hci_stack->le_advertisements_filter_policy); 5929 } 5930 return true; 5931 } 5932 5933 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5934 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5935 uint8_t adv_data_clean[31]; 5936 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5937 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5938 hci_stack->le_advertisements_data_len); 5939 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5940 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5941 if (hci_extended_advertising_supported()){ 5942 hci_stack->le_advertising_set_in_current_command = 0; 5943 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5944 } else 5945 #endif 5946 { 5947 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5948 } 5949 return true; 5950 } 5951 5952 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5953 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5954 uint8_t scan_data_clean[31]; 5955 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5956 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5957 hci_stack->le_scan_response_data_len); 5958 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5959 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5960 if (hci_extended_advertising_supported()){ 5961 hci_stack->le_advertising_set_in_current_command = 0; 5962 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5963 } else 5964 #endif 5965 { 5966 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5967 } 5968 return true; 5969 } 5970 5971 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5972 if (hci_extended_advertising_supported()) { 5973 btstack_linked_list_iterator_t it; 5974 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5975 while (btstack_linked_list_iterator_has_next(&it)){ 5976 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5977 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5978 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5979 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5980 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5981 return true; 5982 } 5983 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5984 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5985 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5986 return true; 5987 } 5988 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5989 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5990 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5991 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5992 advertising_set->advertising_handle, 5993 advertising_set->extended_params.advertising_event_properties, 5994 advertising_set->extended_params.primary_advertising_interval_min, 5995 advertising_set->extended_params.primary_advertising_interval_max, 5996 advertising_set->extended_params.primary_advertising_channel_map, 5997 advertising_set->extended_params.own_address_type, 5998 advertising_set->extended_params.peer_address_type, 5999 advertising_set->extended_params.peer_address, 6000 advertising_set->extended_params.advertising_filter_policy, 6001 advertising_set->extended_params.advertising_tx_power, 6002 advertising_set->extended_params.primary_advertising_phy, 6003 advertising_set->extended_params.secondary_advertising_max_skip, 6004 advertising_set->extended_params.secondary_advertising_phy, 6005 advertising_set->extended_params.advertising_sid, 6006 advertising_set->extended_params.scan_request_notification_enable 6007 ); 6008 return true; 6009 } 6010 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 6011 uint16_t pos = advertising_set->adv_data_pos; 6012 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 6013 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6014 if ((operation & 0x02) != 0){ 6015 // last fragment or complete data 6016 operation |= 2; 6017 advertising_set->adv_data_pos = 0; 6018 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6019 } else { 6020 advertising_set->adv_data_pos += data_to_upload; 6021 } 6022 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6023 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 6024 return true; 6025 } 6026 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 6027 uint16_t pos = advertising_set->scan_data_pos; 6028 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 6029 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6030 if ((operation & 0x02) != 0){ 6031 advertising_set->scan_data_pos = 0; 6032 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6033 } else { 6034 advertising_set->scan_data_pos += data_to_upload; 6035 } 6036 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6037 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 6038 return true; 6039 } 6040 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6041 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 6042 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6043 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6044 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 6045 advertising_set->advertising_handle, 6046 advertising_set->periodic_params.periodic_advertising_interval_min, 6047 advertising_set->periodic_params.periodic_advertising_interval_max, 6048 advertising_set->periodic_params.periodic_advertising_properties); 6049 return true; 6050 } 6051 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 6052 uint16_t pos = advertising_set->periodic_data_pos; 6053 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 6054 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 6055 if ((operation & 0x02) != 0){ 6056 // last fragment or complete data 6057 operation |= 2; 6058 advertising_set->periodic_data_pos = 0; 6059 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6060 } else { 6061 advertising_set->periodic_data_pos += data_to_upload; 6062 } 6063 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 6064 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 6065 return true; 6066 } 6067 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6068 } 6069 } 6070 #endif 6071 6072 #endif 6073 6074 #ifdef ENABLE_LE_CENTRAL 6075 // if connect with whitelist was active and is not cancelled yet, wait until next time 6076 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 6077 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6078 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 6079 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 6080 #endif 6081 #endif 6082 6083 // LE Whitelist Management 6084 if (whitelist_modification_pending){ 6085 // add/remove entries 6086 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6087 while (btstack_linked_list_iterator_has_next(&lit)){ 6088 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6089 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 6090 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6091 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 6092 return true; 6093 } 6094 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 6095 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 6096 entry->state |= LE_WHITELIST_ON_CONTROLLER; 6097 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 6098 return true; 6099 } 6100 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 6101 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6102 btstack_memory_whitelist_entry_free(entry); 6103 } 6104 } 6105 } 6106 6107 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6108 // LE Resolving List Management 6109 if (resolving_list_supported) { 6110 uint16_t i; 6111 switch (hci_stack->le_resolving_list_state) { 6112 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 6113 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6114 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 6115 return true; 6116 case LE_RESOLVING_LIST_READ_SIZE: 6117 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 6118 hci_send_cmd(&hci_le_read_resolving_list_size); 6119 return true; 6120 case LE_RESOLVING_LIST_SEND_CLEAR: 6121 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6122 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 6123 sizeof(hci_stack->le_resolving_list_add_entries)); 6124 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 6125 sizeof(hci_stack->le_resolving_list_remove_entries)); 6126 hci_send_cmd(&hci_le_clear_resolving_list); 6127 return true; 6128 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 6129 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6130 uint8_t offset = i >> 3; 6131 uint8_t mask = 1 << (i & 7); 6132 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 6133 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 6134 bd_addr_t peer_identity_addreses; 6135 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6136 sm_key_t peer_irk; 6137 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6138 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6139 6140 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 6141 // trigger whitelist entry 'update' (work around for controller bug) 6142 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6143 while (btstack_linked_list_iterator_has_next(&lit)) { 6144 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 6145 if (entry->address_type != peer_identity_addr_type) continue; 6146 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 6147 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 6148 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 6149 } 6150 #endif 6151 6152 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 6153 peer_identity_addreses); 6154 return true; 6155 } 6156 6157 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 6158 6159 /* fall through */ 6160 6161 case LE_RESOLVING_LIST_ADD_ENTRIES: 6162 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6163 uint8_t offset = i >> 3; 6164 uint8_t mask = 1 << (i & 7); 6165 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 6166 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 6167 bd_addr_t peer_identity_addreses; 6168 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6169 sm_key_t peer_irk; 6170 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6171 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6172 if (btstack_is_null(peer_irk, 16)) continue; 6173 const uint8_t *local_irk = gap_get_persistent_irk(); 6174 // command uses format specifier 'P' that stores 16-byte value without flip 6175 uint8_t local_irk_flipped[16]; 6176 uint8_t peer_irk_flipped[16]; 6177 reverse_128(local_irk, local_irk_flipped); 6178 reverse_128(peer_irk, peer_irk_flipped); 6179 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 6180 peer_irk_flipped, local_irk_flipped); 6181 return true; 6182 } 6183 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6184 break; 6185 6186 default: 6187 break; 6188 } 6189 } 6190 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6191 #endif 6192 6193 #ifdef ENABLE_LE_CENTRAL 6194 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6195 // LE Whitelist Management 6196 if (periodic_list_modification_pending){ 6197 // add/remove entries 6198 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 6199 while (btstack_linked_list_iterator_has_next(&lit)){ 6200 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 6201 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 6202 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 6203 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 6204 return true; 6205 } 6206 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 6207 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 6208 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 6209 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address, entry->sid); 6210 return true; 6211 } 6212 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 6213 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 6214 btstack_memory_periodic_advertiser_list_entry_free(entry); 6215 } 6216 } 6217 } 6218 #endif 6219 #endif 6220 6221 #ifdef ENABLE_LE_CENTRAL 6222 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6223 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6224 if (hci_stack->le_past_set_default_params){ 6225 hci_stack->le_past_set_default_params = false; 6226 hci_send_cmd(&hci_le_set_default_periodic_advertising_sync_transfer_parameters, 6227 hci_stack->le_past_mode, 6228 hci_stack->le_past_skip, 6229 hci_stack->le_past_sync_timeout, 6230 hci_stack->le_past_cte_type); 6231 return true; 6232 } 6233 #endif 6234 #endif 6235 #endif 6236 6237 // post-pone all actions until stack is fully working 6238 if (hci_stack->state != HCI_STATE_WORKING) return false; 6239 6240 // advertisements, active scanning, and creating connections requires random address to be set if using private address 6241 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 6242 6243 // Phase 4: restore state 6244 6245 #ifdef ENABLE_LE_CENTRAL 6246 // re-start scanning 6247 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 6248 hci_stack->le_scanning_active = true; 6249 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6250 if (hci_extended_advertising_supported()){ 6251 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, hci_stack->le_scan_filter_duplicates, 0, 0); 6252 } else 6253 #endif 6254 { 6255 hci_send_cmd(&hci_le_set_scan_enable, 1, hci_stack->le_scan_filter_duplicates); 6256 } 6257 return true; 6258 } 6259 #endif 6260 6261 #ifdef ENABLE_LE_CENTRAL 6262 // re-start connecting 6263 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 6264 bd_addr_t null_addr; 6265 memset(null_addr, 0, 6); 6266 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6267 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6268 hci_send_cmd(&hci_le_create_connection, 6269 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 6270 hci_stack->le_connection_scan_window, // scan interval: 30 ms 6271 1, // use whitelist 6272 0, // peer address type 6273 null_addr, // peer bd addr 6274 hci_stack->le_connection_own_addr_type, // our addr type: 6275 hci_stack->le_connection_interval_min, // conn interval min 6276 hci_stack->le_connection_interval_max, // conn interval max 6277 hci_stack->le_connection_latency, // conn latency 6278 hci_stack->le_supervision_timeout, // conn latency 6279 hci_stack->le_minimum_ce_length, // min ce length 6280 hci_stack->le_maximum_ce_length // max ce length 6281 ); 6282 return true; 6283 } 6284 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6285 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 6286 switch(hci_stack->le_periodic_sync_request){ 6287 case LE_CONNECTING_DIRECT: 6288 case LE_CONNECTING_WHITELIST: 6289 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 6290 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 6291 hci_stack->le_periodic_sync_options, 6292 hci_stack->le_periodic_sync_advertising_sid, 6293 hci_stack->le_periodic_sync_advertiser_address_type, 6294 hci_stack->le_periodic_sync_advertiser_address, 6295 hci_stack->le_periodic_sync_skip, 6296 hci_stack->le_periodic_sync_timeout, 6297 hci_stack->le_periodic_sync_cte_type); 6298 return true; 6299 default: 6300 break; 6301 } 6302 } 6303 #endif 6304 #endif 6305 6306 #ifdef ENABLE_LE_PERIPHERAL 6307 // re-start advertising 6308 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6309 // check if advertisements should be enabled given 6310 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6311 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 6312 6313 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6314 if (hci_extended_advertising_supported()){ 6315 const uint8_t advertising_handles[] = { 0 }; 6316 const uint16_t durations[] = { 0 }; 6317 const uint16_t max_events[] = { 0 }; 6318 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6319 } else 6320 #endif 6321 { 6322 hci_send_cmd(&hci_le_set_advertise_enable, 1); 6323 } 6324 return true; 6325 } 6326 6327 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6328 if (hci_extended_advertising_supported()) { 6329 btstack_linked_list_iterator_t it; 6330 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6331 while (btstack_linked_list_iterator_has_next(&it)) { 6332 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6333 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6334 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6335 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 6336 const uint16_t durations[] = { advertising_set->enable_timeout }; 6337 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 6338 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6339 return true; 6340 } 6341 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6342 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 6343 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 6344 uint8_t enable = 1; 6345 if (advertising_set->periodic_include_adi){ 6346 enable |= 2; 6347 } 6348 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 6349 return true; 6350 } 6351 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6352 } 6353 } 6354 #endif 6355 #endif 6356 6357 return false; 6358 } 6359 6360 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6361 static bool hci_run_iso_tasks(void){ 6362 btstack_linked_list_iterator_t it; 6363 6364 if (hci_stack->iso_active_operation_type != HCI_ISO_TYPE_INVALID) { 6365 return false; 6366 } 6367 6368 // BIG 6369 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 6370 while (btstack_linked_list_iterator_has_next(&it)){ 6371 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 6372 switch (big->state){ 6373 case LE_AUDIO_BIG_STATE_CREATE: 6374 hci_stack->iso_active_operation_group_id = big->params->big_handle; 6375 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6376 big->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6377 hci_send_cmd(&hci_le_create_big, 6378 big->params->big_handle, 6379 big->params->advertising_handle, 6380 big->params->num_bis, 6381 big->params->sdu_interval_us, 6382 big->params->max_sdu, 6383 big->params->max_transport_latency_ms, 6384 big->params->rtn, 6385 big->params->phy, 6386 big->params->packing, 6387 big->params->framing, 6388 big->params->encryption, 6389 big->params->broadcast_code); 6390 return true; 6391 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6392 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6393 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); 6394 return true; 6395 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6396 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6397 hci_send_cmd(&hci_le_terminate_big, big->big_handle, big->state_vars.status); 6398 return true; 6399 case LE_AUDIO_BIG_STATE_TERMINATE: 6400 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6401 hci_send_cmd(&hci_le_terminate_big, big->big_handle, ERROR_CODE_SUCCESS); 6402 return true; 6403 default: 6404 break; 6405 } 6406 } 6407 6408 // BIG Sync 6409 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 6410 while (btstack_linked_list_iterator_has_next(&it)){ 6411 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 6412 switch (big_sync->state){ 6413 case LE_AUDIO_BIG_STATE_CREATE: 6414 hci_stack->iso_active_operation_group_id = big_sync->params->big_handle; 6415 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6416 big_sync->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6417 hci_send_cmd(&hci_le_big_create_sync, 6418 big_sync->params->big_handle, 6419 big_sync->params->sync_handle, 6420 big_sync->params->encryption, 6421 big_sync->params->broadcast_code, 6422 big_sync->params->mse, 6423 big_sync->params->big_sync_timeout_10ms, 6424 big_sync->params->num_bis, 6425 big_sync->params->bis_indices); 6426 return true; 6427 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6428 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6429 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); 6430 return true; 6431 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6432 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6433 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6434 return true; 6435 case LE_AUDIO_BIG_STATE_TERMINATE: 6436 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6437 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6438 return true; 6439 default: 6440 break; 6441 } 6442 } 6443 6444 // CIG 6445 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_cigs); 6446 while (btstack_linked_list_iterator_has_next(&it)) { 6447 le_audio_cig_t *cig = (le_audio_cig_t *) btstack_linked_list_iterator_next(&it); 6448 uint8_t i; 6449 // Set CIG Parameters 6450 uint8_t cis_id[MAX_NR_CIS]; 6451 uint16_t max_sdu_c_to_p[MAX_NR_CIS]; 6452 uint16_t max_sdu_p_to_c[MAX_NR_CIS]; 6453 uint8_t phy_c_to_p[MAX_NR_CIS]; 6454 uint8_t phy_p_to_c[MAX_NR_CIS]; 6455 uint8_t rtn_c_to_p[MAX_NR_CIS]; 6456 uint8_t rtn_p_to_c[MAX_NR_CIS]; 6457 switch (cig->state) { 6458 case LE_AUDIO_CIG_STATE_CREATE: 6459 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6460 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6461 cig->state = LE_AUDIO_CIG_STATE_W4_ESTABLISHED; 6462 le_audio_cig_params_t * params = cig->params; 6463 for (i = 0; i < params->num_cis; i++) { 6464 le_audio_cis_params_t * cis_params = &cig->params->cis_params[i]; 6465 cis_id[i] = cis_params->cis_id; 6466 max_sdu_c_to_p[i] = cis_params->max_sdu_c_to_p; 6467 max_sdu_p_to_c[i] = cis_params->max_sdu_p_to_c; 6468 phy_c_to_p[i] = cis_params->phy_c_to_p; 6469 phy_p_to_c[i] = cis_params->phy_p_to_c; 6470 rtn_c_to_p[i] = cis_params->rtn_c_to_p; 6471 rtn_p_to_c[i] = cis_params->rtn_p_to_c; 6472 } 6473 hci_send_cmd(&hci_le_set_cig_parameters, 6474 cig->cig_id, 6475 params->sdu_interval_c_to_p, 6476 params->sdu_interval_p_to_c, 6477 params->worst_case_sca, 6478 params->packing, 6479 params->framing, 6480 params->max_transport_latency_c_to_p, 6481 params->max_transport_latency_p_to_c, 6482 params->num_cis, 6483 cis_id, 6484 max_sdu_c_to_p, 6485 max_sdu_p_to_c, 6486 phy_c_to_p, 6487 phy_p_to_c, 6488 rtn_c_to_p, 6489 rtn_p_to_c 6490 ); 6491 return true; 6492 case LE_AUDIO_CIG_STATE_CREATE_CIS: 6493 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6494 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6495 cig->state = LE_AUDIO_CIG_STATE_W4_CREATE_CIS; 6496 for (i=0;i<cig->num_cis;i++){ 6497 cig->cis_setup_active[i] = true; 6498 } 6499 hci_send_cmd(&hci_le_create_cis, cig->num_cis, cig->cis_con_handles, cig->acl_con_handles); 6500 return true; 6501 case LE_AUDIO_CIG_STATE_SETUP_ISO_PATH: 6502 while (cig->state_vars.next_cis < (cig->num_cis * 2)){ 6503 // find next path to setup 6504 uint8_t cis_index = cig->state_vars.next_cis >> 1; 6505 if (cig->cis_established[cis_index] == false) { 6506 continue; 6507 } 6508 uint8_t cis_direction = cig->state_vars.next_cis & 1; 6509 bool setup = true; 6510 if (cis_direction == 0){ 6511 // 0 - input - host to controller 6512 // we are central => central to peripheral 6513 setup &= cig->params->cis_params[cis_index].max_sdu_c_to_p > 0; 6514 } else { 6515 // 1 - output - controller to host 6516 // we are central => peripheral to central 6517 setup &= cig->params->cis_params[cis_index].max_sdu_p_to_c > 0; 6518 } 6519 if (setup){ 6520 hci_stack->iso_active_operation_group_id = cig->params->cig_id; 6521 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6522 cig->state = LE_AUDIO_CIG_STATE_W4_SETUP_ISO_PATH; 6523 hci_send_cmd(&hci_le_setup_iso_data_path, cig->cis_con_handles[cis_index], cis_direction, 0, 0, 0, 0, 0, 0, NULL); 6524 return true; 6525 } 6526 cig->state_vars.next_cis++; 6527 } 6528 // emit done 6529 cig->state = LE_AUDIO_CIG_STATE_ACTIVE; 6530 default: 6531 break; 6532 } 6533 } 6534 6535 // CIS Accept/Reject 6536 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 6537 while (btstack_linked_list_iterator_has_next(&it)) { 6538 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 6539 hci_con_handle_t con_handle; 6540 switch (iso_stream->state){ 6541 case HCI_ISO_STREAM_W2_ACCEPT: 6542 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 6543 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6544 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6545 hci_send_cmd(&hci_le_accept_cis_request, iso_stream->con_handle); 6546 return true; 6547 case HCI_ISO_STREAM_W2_REJECT: 6548 con_handle = iso_stream->con_handle; 6549 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6550 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6551 hci_iso_stream_finalize(iso_stream); 6552 hci_send_cmd(&hci_le_reject_cis_request, con_handle, ERROR_CODE_REMOTE_DEVICE_TERMINATED_CONNECTION_DUE_TO_LOW_RESOURCES); 6553 return true; 6554 case HCI_ISO_STREAM_STATE_W2_SETUP_ISO_INPUT: 6555 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6556 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6557 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ISO_SETUP_INPUT; 6558 hci_send_cmd(&hci_le_setup_iso_data_path, iso_stream->con_handle, 0, 0, 0, 0, 0, 0, 0, NULL); 6559 break; 6560 case HCI_ISO_STREAM_STATE_W2_SETUP_ISO_OUTPUT: 6561 hci_stack->iso_active_operation_group_id = HCI_ISO_GROUP_ID_SINGLE_CIS; 6562 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_CIS; 6563 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ISO_SETUP_OUTPUT; 6564 hci_send_cmd(&hci_le_setup_iso_data_path, iso_stream->con_handle, 1, 0, 0, 0, 0, 0, 0, NULL); 6565 break; 6566 default: 6567 break; 6568 } 6569 } 6570 6571 return false; 6572 } 6573 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6574 #endif 6575 6576 static bool hci_run_general_pending_commands(void){ 6577 btstack_linked_item_t * it; 6578 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6579 hci_connection_t * connection = (hci_connection_t *) it; 6580 6581 switch(connection->state){ 6582 case SEND_CREATE_CONNECTION: 6583 switch(connection->address_type){ 6584 #ifdef ENABLE_CLASSIC 6585 case BD_ADDR_TYPE_ACL: 6586 log_info("sending hci_create_connection"); 6587 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 6588 break; 6589 #endif 6590 default: 6591 #ifdef ENABLE_BLE 6592 #ifdef ENABLE_LE_CENTRAL 6593 log_info("sending hci_le_create_connection"); 6594 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6595 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6596 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6597 if (hci_extended_advertising_supported()) { 6598 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 6599 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 6600 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 6601 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 6602 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 6603 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 6604 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 6605 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 6606 hci_send_cmd(&hci_le_extended_create_connection, 6607 0, // don't use whitelist 6608 hci_stack->le_connection_own_addr_type, // our addr type: 6609 connection->address_type, // peer address type 6610 connection->address, // peer bd addr 6611 1, // initiating PHY - 1M 6612 le_connection_scan_interval, // conn scan interval 6613 le_connection_scan_window, // conn scan windows 6614 le_connection_interval_min, // conn interval min 6615 le_connection_interval_max, // conn interval max 6616 le_connection_latency, // conn latency 6617 le_supervision_timeout, // conn latency 6618 le_minimum_ce_length, // min ce length 6619 le_maximum_ce_length // max ce length 6620 ); } 6621 else 6622 #endif 6623 { 6624 hci_send_cmd(&hci_le_create_connection, 6625 hci_stack->le_connection_scan_interval, // conn scan interval 6626 hci_stack->le_connection_scan_window, // conn scan windows 6627 0, // don't use whitelist 6628 connection->address_type, // peer address type 6629 connection->address, // peer bd addr 6630 hci_stack->le_connection_own_addr_type, // our addr type: 6631 hci_stack->le_connection_interval_min, // conn interval min 6632 hci_stack->le_connection_interval_max, // conn interval max 6633 hci_stack->le_connection_latency, // conn latency 6634 hci_stack->le_supervision_timeout, // conn latency 6635 hci_stack->le_minimum_ce_length, // min ce length 6636 hci_stack->le_maximum_ce_length // max ce length 6637 ); 6638 } 6639 connection->state = SENT_CREATE_CONNECTION; 6640 #endif 6641 #endif 6642 break; 6643 } 6644 return true; 6645 6646 #ifdef ENABLE_CLASSIC 6647 case RECEIVED_CONNECTION_REQUEST: 6648 connection->role = HCI_ROLE_SLAVE; 6649 if (connection->address_type == BD_ADDR_TYPE_ACL){ 6650 log_info("sending hci_accept_connection_request"); 6651 connection->state = ACCEPTED_CONNECTION_REQUEST; 6652 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 6653 return true; 6654 } 6655 break; 6656 #endif 6657 case SEND_DISCONNECT: 6658 connection->state = SENT_DISCONNECT; 6659 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6660 return true; 6661 6662 default: 6663 break; 6664 } 6665 6666 // no further commands if connection is about to get shut down 6667 if (connection->state == SENT_DISCONNECT) continue; 6668 6669 #ifdef ENABLE_CLASSIC 6670 6671 // Handling link key request requires remote supported features 6672 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 6673 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 6674 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6675 6676 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 6677 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 6678 if (have_link_key && security_level_sufficient){ 6679 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 6680 } else { 6681 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 6682 } 6683 return true; 6684 } 6685 6686 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 6687 log_info("denying to pin request"); 6688 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 6689 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 6690 return true; 6691 } 6692 6693 // security assessment requires remote features 6694 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 6695 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 6696 hci_ssp_assess_security_on_io_cap_request(connection); 6697 // 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 6698 } 6699 6700 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 6701 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6702 // set authentication requirements: 6703 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 6704 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 6705 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 6706 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 6707 authreq |= 1; 6708 } 6709 bool bonding = hci_stack->bondable; 6710 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 6711 // if we have received IO Cap Response, we're in responder role 6712 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6713 if (bonding && !remote_bonding){ 6714 log_info("Remote not bonding, dropping local flag"); 6715 bonding = false; 6716 } 6717 } 6718 if (bonding){ 6719 if (connection->bonding_flags & BONDING_DEDICATED){ 6720 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6721 } else { 6722 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 6723 } 6724 } 6725 uint8_t have_oob_data = 0; 6726 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6727 if (connection->classic_oob_c_192 != NULL){ 6728 have_oob_data |= 1; 6729 } 6730 if (connection->classic_oob_c_256 != NULL){ 6731 have_oob_data |= 2; 6732 } 6733 #endif 6734 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 6735 return true; 6736 } 6737 6738 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 6739 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6740 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 6741 return true; 6742 } 6743 6744 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6745 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6746 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6747 const uint8_t zero[16] = { 0 }; 6748 const uint8_t * r_192 = zero; 6749 const uint8_t * c_192 = zero; 6750 const uint8_t * r_256 = zero; 6751 const uint8_t * c_256 = zero; 6752 // verify P-256 OOB 6753 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6754 c_256 = connection->classic_oob_c_256; 6755 if (connection->classic_oob_r_256 != NULL) { 6756 r_256 = connection->classic_oob_r_256; 6757 } 6758 } 6759 // verify P-192 OOB 6760 if ((connection->classic_oob_c_192 != NULL)) { 6761 c_192 = connection->classic_oob_c_192; 6762 if (connection->classic_oob_r_192 != NULL) { 6763 r_192 = connection->classic_oob_r_192; 6764 } 6765 } 6766 6767 // assess security 6768 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6769 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6770 if (need_level_4 && !can_reach_level_4){ 6771 log_info("Level 4 required, but not possible -> abort"); 6772 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6773 // send oob negative reply 6774 c_256 = NULL; 6775 c_192 = NULL; 6776 } 6777 6778 // Reply 6779 if (c_256 != zero) { 6780 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6781 } else if (c_192 != zero){ 6782 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6783 } else { 6784 hci_stack->classic_oob_con_handle = connection->con_handle; 6785 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6786 } 6787 return true; 6788 } 6789 #endif 6790 6791 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6792 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6793 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6794 return true; 6795 } 6796 6797 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6798 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6799 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6800 return true; 6801 } 6802 6803 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6804 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6805 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6806 return true; 6807 } 6808 6809 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6810 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6811 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6812 connection->state = SENT_DISCONNECT; 6813 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6814 return true; 6815 } 6816 6817 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6818 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6819 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6820 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6821 return true; 6822 } 6823 6824 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6825 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6826 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6827 return true; 6828 } 6829 6830 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6831 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6832 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6833 return true; 6834 } 6835 6836 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6837 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6838 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6839 return true; 6840 } 6841 6842 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6843 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6844 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6845 return true; 6846 } 6847 6848 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6849 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6850 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6851 return true; 6852 } 6853 #endif 6854 6855 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6856 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6857 #ifdef ENABLE_CLASSIC 6858 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6859 #endif 6860 if (connection->state != SENT_DISCONNECT){ 6861 connection->state = SENT_DISCONNECT; 6862 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6863 return true; 6864 } 6865 } 6866 6867 #ifdef ENABLE_CLASSIC 6868 uint16_t sniff_min_interval; 6869 switch (connection->sniff_min_interval){ 6870 case 0: 6871 break; 6872 case 0xffff: 6873 connection->sniff_min_interval = 0; 6874 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6875 return true; 6876 default: 6877 sniff_min_interval = connection->sniff_min_interval; 6878 connection->sniff_min_interval = 0; 6879 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6880 return true; 6881 } 6882 6883 if (connection->sniff_subrating_max_latency != 0xffff){ 6884 uint16_t max_latency = connection->sniff_subrating_max_latency; 6885 connection->sniff_subrating_max_latency = 0; 6886 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6887 return true; 6888 } 6889 6890 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6891 uint8_t service_type = (uint8_t) connection->qos_service_type; 6892 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6893 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); 6894 return true; 6895 } 6896 6897 if (connection->request_role != HCI_ROLE_INVALID){ 6898 hci_role_t role = connection->request_role; 6899 connection->request_role = HCI_ROLE_INVALID; 6900 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6901 return true; 6902 } 6903 #endif 6904 6905 if (connection->gap_connection_tasks != 0){ 6906 #ifdef ENABLE_CLASSIC 6907 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6908 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6909 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6910 return true; 6911 } 6912 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6913 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6914 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6915 return true; 6916 } 6917 #endif 6918 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6919 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6920 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6921 return true; 6922 } 6923 #ifdef ENABLE_BLE 6924 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_LE_READ_REMOTE_FEATURES){ 6925 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_LE_READ_REMOTE_FEATURES; 6926 hci_send_cmd(&hci_le_read_remote_used_features, connection->con_handle); 6927 return true; 6928 } 6929 #endif 6930 } 6931 6932 #ifdef ENABLE_BLE 6933 switch (connection->le_con_parameter_update_state){ 6934 // response to L2CAP CON PARAMETER UPDATE REQUEST 6935 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6936 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6937 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6938 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6939 0x0000, 0xffff); 6940 return true; 6941 case CON_PARAMETER_UPDATE_REPLY: 6942 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6943 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6944 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6945 0x0000, 0xffff); 6946 return true; 6947 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6948 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6949 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6950 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6951 return true; 6952 default: 6953 break; 6954 } 6955 if (connection->le_phy_update_all_phys != 0xffu){ 6956 uint8_t all_phys = connection->le_phy_update_all_phys; 6957 connection->le_phy_update_all_phys = 0xff; 6958 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); 6959 return true; 6960 } 6961 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6962 if (connection->le_past_sync_handle != HCI_CON_HANDLE_INVALID){ 6963 hci_con_handle_t sync_handle = connection->le_past_sync_handle; 6964 connection->le_past_sync_handle = HCI_CON_HANDLE_INVALID; 6965 hci_send_cmd(&hci_le_periodic_advertising_sync_transfer, connection->con_handle, connection->le_past_service_data, sync_handle); 6966 return true; 6967 } 6968 #endif 6969 #endif 6970 } 6971 return false; 6972 } 6973 6974 static void hci_run(void){ 6975 6976 // stack state sub statemachines 6977 switch (hci_stack->state) { 6978 case HCI_STATE_INITIALIZING: 6979 hci_initializing_run(); 6980 break; 6981 case HCI_STATE_HALTING: 6982 hci_halting_run(); 6983 break; 6984 case HCI_STATE_FALLING_ASLEEP: 6985 hci_falling_asleep_run(); 6986 break; 6987 default: 6988 break; 6989 } 6990 6991 // allow to run after initialization to working transition 6992 if (hci_stack->state != HCI_STATE_WORKING){ 6993 return; 6994 } 6995 6996 bool done; 6997 6998 // send continuation fragments first, as they block the prepared packet buffer 6999 done = hci_run_acl_fragments(); 7000 if (done) return; 7001 7002 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7003 done = hci_run_iso_fragments(); 7004 if (done) return; 7005 #endif 7006 7007 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 7008 // send host num completed packets next as they don't require num_cmd_packets > 0 7009 if (!hci_can_send_comand_packet_transport()) return; 7010 if (hci_stack->host_completed_packets){ 7011 hci_host_num_completed_packets(); 7012 return; 7013 } 7014 #endif 7015 7016 if (!hci_can_send_command_packet_now()) return; 7017 7018 // global/non-connection oriented commands 7019 7020 7021 #ifdef ENABLE_CLASSIC 7022 // general gap classic 7023 done = hci_run_general_gap_classic(); 7024 if (done) return; 7025 #endif 7026 7027 #ifdef ENABLE_BLE 7028 // general gap le 7029 done = hci_run_general_gap_le(); 7030 if (done) return; 7031 7032 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7033 // ISO related tasks, e.g. BIG create/terminate/sync 7034 done = hci_run_iso_tasks(); 7035 if (done) return; 7036 #endif 7037 #endif 7038 7039 // send pending HCI commands 7040 hci_run_general_pending_commands(); 7041 } 7042 7043 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 7044 // house-keeping 7045 7046 #ifdef ENABLE_CLASSIC 7047 bd_addr_t addr; 7048 hci_connection_t * conn; 7049 #endif 7050 #ifdef ENABLE_LE_CENTRAL 7051 uint8_t initiator_filter_policy; 7052 #endif 7053 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 7054 uint8_t i; 7055 uint8_t num_cis; 7056 hci_con_handle_t cis_handle; 7057 uint8_t status; 7058 #endif 7059 7060 uint16_t opcode = little_endian_read_16(packet, 0); 7061 switch (opcode) { 7062 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 7063 hci_stack->loopback_mode = packet[3]; 7064 break; 7065 7066 #ifdef ENABLE_CLASSIC 7067 case HCI_OPCODE_HCI_CREATE_CONNECTION: 7068 reverse_bd_addr(&packet[3], addr); 7069 log_info("Create_connection to %s", bd_addr_to_str(addr)); 7070 7071 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 7072 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 7073 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 7074 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 7075 } 7076 7077 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7078 if (!conn) { 7079 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7080 if (!conn) { 7081 // notify client that alloc failed 7082 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7083 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 7084 } 7085 conn->state = SEND_CREATE_CONNECTION; 7086 conn->role = HCI_ROLE_MASTER; 7087 } 7088 7089 log_info("conn state %u", conn->state); 7090 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 7091 switch (conn->state) { 7092 // if connection active exists 7093 case OPEN: 7094 // and OPEN, emit connection complete command 7095 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 7096 // packet not sent to controller 7097 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7098 case RECEIVED_DISCONNECTION_COMPLETE: 7099 // create connection triggered in disconnect complete event, let's do it now 7100 break; 7101 case SEND_CREATE_CONNECTION: 7102 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 7103 if (hci_classic_operation_active()){ 7104 return ERROR_CODE_SUCCESS; 7105 } 7106 #endif 7107 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 7108 break; 7109 default: 7110 // otherwise, just ignore as it is already in the open process 7111 // packet not sent to controller 7112 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7113 } 7114 conn->state = SENT_CREATE_CONNECTION; 7115 7116 // track outgoing connection 7117 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 7118 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 7119 break; 7120 7121 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 7122 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 7123 // setup_synchronous_connection? Voice setting at offset 22 7124 // TODO: compare to current setting if sco connection already active 7125 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 7126 break; 7127 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 7128 // accept_synchronous_connection? Voice setting at offset 18 7129 // TODO: compare to current setting if sco connection already active 7130 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 7131 // track outgoing connection 7132 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 7133 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 7134 break; 7135 #endif 7136 #endif 7137 7138 #ifdef ENABLE_BLE 7139 #ifdef ENABLE_LE_CENTRAL 7140 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 7141 // white list used? 7142 initiator_filter_policy = packet[7]; 7143 switch (initiator_filter_policy) { 7144 case 0: 7145 // whitelist not used 7146 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 7147 break; 7148 case 1: 7149 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 7150 break; 7151 default: 7152 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 7153 break; 7154 } 7155 // track outgoing connection 7156 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 7157 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 7158 break; 7159 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 7160 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 7161 break; 7162 #endif 7163 #endif /* ENABLE_BLE */ 7164 default: 7165 break; 7166 } 7167 7168 hci_stack->num_cmd_packets--; 7169 7170 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 7171 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 7172 if (err != 0){ 7173 return ERROR_CODE_HARDWARE_FAILURE; 7174 } 7175 return ERROR_CODE_SUCCESS; 7176 } 7177 7178 // disconnect because of security block 7179 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 7180 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7181 if (!connection) return; 7182 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 7183 } 7184 7185 7186 // Configure Secure Simple Pairing 7187 7188 #ifdef ENABLE_CLASSIC 7189 7190 // enable will enable SSP during init 7191 void gap_ssp_set_enable(int enable){ 7192 hci_stack->ssp_enable = enable; 7193 } 7194 7195 static int hci_local_ssp_activated(void){ 7196 return gap_ssp_supported() && hci_stack->ssp_enable; 7197 } 7198 7199 // if set, BTstack will respond to io capability request using authentication requirement 7200 void gap_ssp_set_io_capability(int io_capability){ 7201 hci_stack->ssp_io_capability = io_capability; 7202 } 7203 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 7204 hci_stack->ssp_authentication_requirement = authentication_requirement; 7205 } 7206 7207 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 7208 void gap_ssp_set_auto_accept(int auto_accept){ 7209 hci_stack->ssp_auto_accept = auto_accept; 7210 } 7211 7212 void gap_secure_connections_enable(bool enable){ 7213 hci_stack->secure_connections_enable = enable; 7214 } 7215 bool gap_secure_connections_active(void){ 7216 return hci_stack->secure_connections_active; 7217 } 7218 7219 #endif 7220 7221 // va_list part of hci_send_cmd 7222 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 7223 if (!hci_can_send_command_packet_now()){ 7224 log_error("hci_send_cmd called but cannot send packet now"); 7225 return ERROR_CODE_COMMAND_DISALLOWED; 7226 } 7227 7228 // for HCI INITIALIZATION 7229 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 7230 hci_stack->last_cmd_opcode = cmd->opcode; 7231 7232 hci_reserve_packet_buffer(); 7233 uint8_t * packet = hci_stack->hci_packet_buffer; 7234 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 7235 uint8_t status = hci_send_cmd_packet(packet, size); 7236 7237 // release packet buffer on error or for synchronous transport implementations 7238 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 7239 hci_release_packet_buffer(); 7240 hci_emit_transport_packet_sent(); 7241 } 7242 7243 return status; 7244 } 7245 7246 /** 7247 * pre: numcmds >= 0 - it's allowed to send a command to the controller 7248 */ 7249 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 7250 va_list argptr; 7251 va_start(argptr, cmd); 7252 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 7253 va_end(argptr); 7254 return status; 7255 } 7256 7257 // Create various non-HCI events. 7258 // TODO: generalize, use table similar to hci_create_command 7259 7260 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 7261 // dump packet 7262 if (dump) { 7263 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 7264 } 7265 7266 // dispatch to all event handlers 7267 btstack_linked_list_iterator_t it; 7268 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 7269 while (btstack_linked_list_iterator_has_next(&it)){ 7270 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 7271 entry->callback(HCI_EVENT_PACKET, 0, event, size); 7272 } 7273 } 7274 7275 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 7276 if (!hci_stack->acl_packet_handler) return; 7277 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 7278 } 7279 7280 #ifdef ENABLE_CLASSIC 7281 static void hci_notify_if_sco_can_send_now(void){ 7282 // notify SCO sender if waiting 7283 if (!hci_stack->sco_waiting_for_can_send_now) return; 7284 if (hci_can_send_sco_packet_now()){ 7285 hci_stack->sco_waiting_for_can_send_now = 0; 7286 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 7287 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 7288 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 7289 } 7290 } 7291 7292 // parsing end emitting has been merged to reduce code size 7293 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 7294 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 7295 7296 uint8_t * eir_data; 7297 ad_context_t context; 7298 const uint8_t * name; 7299 uint8_t name_len; 7300 7301 if (size < 3) return; 7302 7303 int event_type = hci_event_packet_get_type(packet); 7304 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 7305 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 7306 7307 switch (event_type){ 7308 case HCI_EVENT_INQUIRY_RESULT: 7309 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7310 if (size != (3 + (num_responses * 14))) return; 7311 break; 7312 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7313 if (size != 257) return; 7314 if (num_responses != 1) return; 7315 break; 7316 default: 7317 return; 7318 } 7319 7320 // event[1] is set at the end 7321 int i; 7322 for (i=0; i<num_responses;i++){ 7323 memset(event, 0, sizeof(event)); 7324 event[0] = GAP_EVENT_INQUIRY_RESULT; 7325 uint8_t event_size = 27; // if name is not set by EIR 7326 7327 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 7328 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 7329 (void)memcpy(&event[9], 7330 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 7331 3); // class of device 7332 (void)memcpy(&event[12], 7333 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 7334 2); // clock offset 7335 7336 switch (event_type){ 7337 case HCI_EVENT_INQUIRY_RESULT: 7338 // 14,15,16,17 = 0, size 18 7339 break; 7340 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7341 event[14] = 1; 7342 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7343 // 16,17 = 0, size 18 7344 break; 7345 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7346 event[14] = 1; 7347 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7348 // EIR packets only contain a single inquiry response 7349 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 7350 name = NULL; 7351 // Iterate over EIR data 7352 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 7353 uint8_t data_type = ad_iterator_get_data_type(&context); 7354 uint8_t data_size = ad_iterator_get_data_len(&context); 7355 const uint8_t * data = ad_iterator_get_data(&context); 7356 // Prefer Complete Local Name over Shortened Local Name 7357 switch (data_type){ 7358 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 7359 if (name) continue; 7360 /* fall through */ 7361 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 7362 name = data; 7363 name_len = data_size; 7364 break; 7365 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 7366 if (data_size != 8) break; 7367 event[16] = 1; 7368 memcpy(&event[17], data, 8); 7369 break; 7370 default: 7371 break; 7372 } 7373 } 7374 if (name){ 7375 event[25] = 1; 7376 // truncate name if needed 7377 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 7378 event[26] = len; 7379 (void)memcpy(&event[27], name, len); 7380 event_size += len; 7381 } 7382 break; 7383 default: 7384 return; 7385 } 7386 event[1] = event_size - 2; 7387 hci_emit_event(event, event_size, 1); 7388 } 7389 } 7390 #endif 7391 7392 void hci_emit_state(void){ 7393 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 7394 uint8_t event[3]; 7395 event[0] = BTSTACK_EVENT_STATE; 7396 event[1] = sizeof(event) - 2u; 7397 event[2] = hci_stack->state; 7398 hci_emit_event(event, sizeof(event), 1); 7399 } 7400 7401 #ifdef ENABLE_CLASSIC 7402 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 7403 uint8_t event[13]; 7404 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 7405 event[1] = sizeof(event) - 2; 7406 event[2] = status; 7407 little_endian_store_16(event, 3, con_handle); 7408 reverse_bd_addr(address, &event[5]); 7409 event[11] = 1; // ACL connection 7410 event[12] = 0; // encryption disabled 7411 hci_emit_event(event, sizeof(event), 1); 7412 } 7413 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 7414 if (disable_l2cap_timeouts) return; 7415 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 7416 uint8_t event[4]; 7417 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 7418 event[1] = sizeof(event) - 2; 7419 little_endian_store_16(event, 2, conn->con_handle); 7420 hci_emit_event(event, sizeof(event), 1); 7421 } 7422 #endif 7423 7424 #ifdef ENABLE_BLE 7425 #ifdef ENABLE_LE_CENTRAL 7426 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){ 7427 uint8_t event[21]; 7428 event[0] = HCI_EVENT_LE_META; 7429 event[1] = sizeof(event) - 2u; 7430 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 7431 event[3] = status; 7432 little_endian_store_16(event, 4, con_handle); 7433 event[6] = 0; // TODO: role 7434 event[7] = address_type; 7435 reverse_bd_addr(address, &event[8]); 7436 little_endian_store_16(event, 14, 0); // interval 7437 little_endian_store_16(event, 16, 0); // latency 7438 little_endian_store_16(event, 18, 0); // supervision timeout 7439 event[20] = 0; // master clock accuracy 7440 hci_emit_event(event, sizeof(event), 1); 7441 } 7442 #endif 7443 #endif 7444 7445 static void hci_emit_transport_packet_sent(void){ 7446 // notify upper stack that it might be possible to send again 7447 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 7448 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 7449 } 7450 7451 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 7452 uint8_t event[6]; 7453 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 7454 event[1] = sizeof(event) - 2u; 7455 event[2] = 0; // status = OK 7456 little_endian_store_16(event, 3, con_handle); 7457 event[5] = reason; 7458 hci_emit_event(event, sizeof(event), 1); 7459 } 7460 7461 static void hci_emit_nr_connections_changed(void){ 7462 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 7463 uint8_t event[3]; 7464 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 7465 event[1] = sizeof(event) - 2u; 7466 event[2] = nr_hci_connections(); 7467 hci_emit_event(event, sizeof(event), 1); 7468 } 7469 7470 static void hci_emit_hci_open_failed(void){ 7471 log_info("BTSTACK_EVENT_POWERON_FAILED"); 7472 uint8_t event[2]; 7473 event[0] = BTSTACK_EVENT_POWERON_FAILED; 7474 event[1] = sizeof(event) - 2u; 7475 hci_emit_event(event, sizeof(event), 1); 7476 } 7477 7478 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 7479 log_info("hci_emit_dedicated_bonding_result %u ", status); 7480 uint8_t event[9]; 7481 int pos = 0; 7482 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 7483 event[pos++] = sizeof(event) - 2u; 7484 event[pos++] = status; 7485 reverse_bd_addr(address, &event[pos]); 7486 hci_emit_event(event, sizeof(event), 1); 7487 } 7488 7489 7490 #ifdef ENABLE_CLASSIC 7491 7492 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 7493 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 7494 uint8_t event[5]; 7495 int pos = 0; 7496 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 7497 event[pos++] = sizeof(event) - 2; 7498 little_endian_store_16(event, 2, con_handle); 7499 pos += 2; 7500 event[pos++] = level; 7501 hci_emit_event(event, sizeof(event), 1); 7502 } 7503 7504 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 7505 if (!connection) return LEVEL_0; 7506 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 7507 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 7508 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 7509 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 7510 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 7511 // LEVEL 4 always requires 128 bit encrytion key size 7512 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 7513 security_level = LEVEL_3; 7514 } 7515 return security_level; 7516 } 7517 7518 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable){ 7519 uint8_t event[4]; 7520 event[0] = BTSTACK_EVENT_SCAN_MODE_CHANGED; 7521 event[1] = sizeof(event) - 2; 7522 event[2] = discoverable; 7523 event[3] = connectable; 7524 hci_emit_event(event, sizeof(event), 1); 7525 } 7526 7527 // query if remote side supports eSCO 7528 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 7529 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7530 if (!connection) return false; 7531 return (connection->remote_supported_features[0] & 1) != 0; 7532 } 7533 7534 static bool hci_ssp_supported(hci_connection_t * connection){ 7535 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 7536 return (connection->bonding_flags & mask) == mask; 7537 } 7538 7539 // query if remote side supports SSP 7540 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 7541 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7542 if (!connection) return false; 7543 return hci_ssp_supported(connection) ? 1 : 0; 7544 } 7545 7546 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 7547 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 7548 } 7549 7550 /** 7551 * Check if remote supported features query has completed 7552 */ 7553 bool hci_remote_features_available(hci_con_handle_t handle){ 7554 hci_connection_t * connection = hci_connection_for_handle(handle); 7555 if (!connection) return false; 7556 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 7557 } 7558 7559 /** 7560 * Trigger remote supported features query 7561 */ 7562 7563 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 7564 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 7565 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 7566 } 7567 } 7568 7569 void hci_remote_features_query(hci_con_handle_t con_handle){ 7570 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7571 if (!connection) return; 7572 hci_trigger_remote_features_for_connection(connection); 7573 hci_run(); 7574 } 7575 7576 // GAP API 7577 /** 7578 * @bbrief enable/disable bonding. default is enabled 7579 * @praram enabled 7580 */ 7581 void gap_set_bondable_mode(int enable){ 7582 hci_stack->bondable = enable ? 1 : 0; 7583 } 7584 /** 7585 * @brief Get bondable mode. 7586 * @return 1 if bondable 7587 */ 7588 int gap_get_bondable_mode(void){ 7589 return hci_stack->bondable; 7590 } 7591 7592 /** 7593 * @brief map link keys to security levels 7594 */ 7595 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 7596 switch (link_key_type){ 7597 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7598 return LEVEL_4; 7599 case COMBINATION_KEY: 7600 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7601 return LEVEL_3; 7602 default: 7603 return LEVEL_2; 7604 } 7605 } 7606 7607 /** 7608 * @brief map link keys to secure connection yes/no 7609 */ 7610 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 7611 switch (link_key_type){ 7612 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7613 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7614 return true; 7615 default: 7616 return false; 7617 } 7618 } 7619 7620 /** 7621 * @brief map link keys to authenticated 7622 */ 7623 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 7624 switch (link_key_type){ 7625 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7626 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7627 return true; 7628 default: 7629 return false; 7630 } 7631 } 7632 7633 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 7634 log_info("gap_mitm_protection_required_for_security_level %u", level); 7635 return level > LEVEL_2; 7636 } 7637 7638 /** 7639 * @brief get current security level 7640 */ 7641 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 7642 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7643 if (!connection) return LEVEL_0; 7644 return gap_security_level_for_connection(connection); 7645 } 7646 7647 /** 7648 * @brief request connection to device to 7649 * @result GAP_AUTHENTICATION_RESULT 7650 */ 7651 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 7652 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7653 if (!connection){ 7654 hci_emit_security_level(con_handle, LEVEL_0); 7655 return; 7656 } 7657 7658 btstack_assert(hci_is_le_connection(connection) == false); 7659 7660 // 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) 7661 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 7662 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 7663 requested_level = LEVEL_4; 7664 } 7665 7666 gap_security_level_t current_level = gap_security_level(con_handle); 7667 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 7668 requested_level, connection->requested_security_level, current_level); 7669 7670 // authentication active if authentication request was sent or planned level > 0 7671 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 7672 if (authentication_active){ 7673 // authentication already active 7674 if (connection->requested_security_level < requested_level){ 7675 // increase requested level as new level is higher 7676 // TODO: handle re-authentication when done 7677 connection->requested_security_level = requested_level; 7678 } 7679 } else { 7680 // no request active, notify if security sufficient 7681 if (requested_level <= current_level){ 7682 hci_emit_security_level(con_handle, current_level); 7683 return; 7684 } 7685 7686 // store request 7687 connection->requested_security_level = requested_level; 7688 7689 // start to authenticate connection 7690 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 7691 7692 // request remote features if not already active, also trigger hci_run 7693 hci_remote_features_query(con_handle); 7694 } 7695 } 7696 7697 /** 7698 * @brief start dedicated bonding with device. disconnect after bonding 7699 * @param device 7700 * @param request MITM protection 7701 * @result GAP_DEDICATED_BONDING_COMPLETE 7702 */ 7703 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 7704 7705 // create connection state machine 7706 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 7707 7708 if (!connection){ 7709 return BTSTACK_MEMORY_ALLOC_FAILED; 7710 } 7711 7712 // delete linkn key 7713 gap_drop_link_key_for_bd_addr(device); 7714 7715 // configure LEVEL_2/3, dedicated bonding 7716 connection->state = SEND_CREATE_CONNECTION; 7717 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 7718 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 7719 connection->bonding_flags = BONDING_DEDICATED; 7720 7721 // wait for GAP Security Result and send GAP Dedicated Bonding complete 7722 7723 // handle: connnection failure (connection complete != ok) 7724 // handle: authentication failure 7725 // handle: disconnect on done 7726 7727 hci_run(); 7728 7729 return 0; 7730 } 7731 7732 void gap_set_local_name(const char * local_name){ 7733 hci_stack->local_name = local_name; 7734 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7735 // also update EIR if not set by user 7736 if (hci_stack->eir_data == NULL){ 7737 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7738 } 7739 hci_run(); 7740 } 7741 #endif 7742 7743 7744 #ifdef ENABLE_BLE 7745 7746 #ifdef ENABLE_LE_CENTRAL 7747 void gap_start_scan(void){ 7748 hci_stack->le_scanning_enabled = true; 7749 hci_run(); 7750 } 7751 7752 void gap_stop_scan(void){ 7753 hci_stack->le_scanning_enabled = false; 7754 hci_run(); 7755 } 7756 7757 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7758 hci_stack->le_scan_type = scan_type; 7759 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7760 hci_stack->le_scan_interval = scan_interval; 7761 hci_stack->le_scan_window = scan_window; 7762 hci_stack->le_scanning_param_update = true; 7763 hci_run(); 7764 } 7765 7766 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7767 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7768 } 7769 7770 void gap_set_scan_duplicate_filter(bool enabled){ 7771 hci_stack->le_scan_filter_duplicates = enabled ? 1 : 0; 7772 } 7773 7774 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7775 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7776 if (!conn){ 7777 // disallow if le connection is already outgoing 7778 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7779 log_error("le connection already active"); 7780 return ERROR_CODE_COMMAND_DISALLOWED; 7781 } 7782 7783 log_info("gap_connect: no connection exists yet, creating context"); 7784 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7785 if (!conn){ 7786 // notify client that alloc failed 7787 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7788 log_info("gap_connect: failed to alloc hci_connection_t"); 7789 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7790 } 7791 7792 // set le connecting state 7793 if (hci_is_le_connection_type(addr_type)){ 7794 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7795 } 7796 7797 conn->state = SEND_CREATE_CONNECTION; 7798 log_info("gap_connect: send create connection next"); 7799 hci_run(); 7800 return ERROR_CODE_SUCCESS; 7801 } 7802 7803 if (!hci_is_le_connection(conn) || 7804 (conn->state == SEND_CREATE_CONNECTION) || 7805 (conn->state == SENT_CREATE_CONNECTION)) { 7806 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7807 log_error("gap_connect: classic connection or connect is already being created"); 7808 return GATT_CLIENT_IN_WRONG_STATE; 7809 } 7810 7811 // check if connection was just disconnected 7812 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7813 log_info("gap_connect: send create connection (again)"); 7814 conn->state = SEND_CREATE_CONNECTION; 7815 hci_run(); 7816 return ERROR_CODE_SUCCESS; 7817 } 7818 7819 log_info("gap_connect: context exists with state %u", conn->state); 7820 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7821 hci_run(); 7822 return ERROR_CODE_SUCCESS; 7823 } 7824 7825 // @assumption: only a single outgoing LE Connection exists 7826 static hci_connection_t * gap_get_outgoing_connection(void){ 7827 btstack_linked_item_t *it; 7828 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7829 hci_connection_t * conn = (hci_connection_t *) it; 7830 if (!hci_is_le_connection(conn)) continue; 7831 switch (conn->state){ 7832 case SEND_CREATE_CONNECTION: 7833 case SENT_CREATE_CONNECTION: 7834 return conn; 7835 default: 7836 break; 7837 }; 7838 } 7839 return NULL; 7840 } 7841 7842 uint8_t gap_connect_cancel(void){ 7843 hci_connection_t * conn; 7844 switch (hci_stack->le_connecting_request){ 7845 case LE_CONNECTING_IDLE: 7846 break; 7847 case LE_CONNECTING_WHITELIST: 7848 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7849 hci_run(); 7850 break; 7851 case LE_CONNECTING_DIRECT: 7852 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7853 conn = gap_get_outgoing_connection(); 7854 if (conn == NULL){ 7855 hci_run(); 7856 } else { 7857 switch (conn->state){ 7858 case SEND_CREATE_CONNECTION: 7859 // skip sending create connection and emit event instead 7860 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7861 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7862 btstack_memory_hci_connection_free( conn ); 7863 break; 7864 case SENT_CREATE_CONNECTION: 7865 // let hci_run_general_gap_le cancel outgoing connection 7866 hci_run(); 7867 break; 7868 default: 7869 break; 7870 } 7871 } 7872 break; 7873 default: 7874 btstack_unreachable(); 7875 break; 7876 } 7877 return ERROR_CODE_SUCCESS; 7878 } 7879 7880 /** 7881 * @brief Set connection parameters for outgoing connections 7882 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7883 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7884 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7885 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7886 * @param conn_latency, default: 4 7887 * @param supervision_timeout (unit: 10ms), default: 720 ms 7888 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7889 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7890 */ 7891 7892 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7893 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7894 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7895 hci_stack->le_connection_scan_interval = conn_scan_interval; 7896 hci_stack->le_connection_scan_window = conn_scan_window; 7897 hci_stack->le_connection_interval_min = conn_interval_min; 7898 hci_stack->le_connection_interval_max = conn_interval_max; 7899 hci_stack->le_connection_latency = conn_latency; 7900 hci_stack->le_supervision_timeout = supervision_timeout; 7901 hci_stack->le_minimum_ce_length = min_ce_length; 7902 hci_stack->le_maximum_ce_length = max_ce_length; 7903 } 7904 #endif 7905 7906 /** 7907 * @brief Updates the connection parameters for a given LE connection 7908 * @param handle 7909 * @param conn_interval_min (unit: 1.25ms) 7910 * @param conn_interval_max (unit: 1.25ms) 7911 * @param conn_latency 7912 * @param supervision_timeout (unit: 10ms) 7913 * @return 0 if ok 7914 */ 7915 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7916 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7917 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7918 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7919 connection->le_conn_interval_min = conn_interval_min; 7920 connection->le_conn_interval_max = conn_interval_max; 7921 connection->le_conn_latency = conn_latency; 7922 connection->le_supervision_timeout = supervision_timeout; 7923 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7924 hci_run(); 7925 return 0; 7926 } 7927 7928 /** 7929 * @brief Request an update of the connection parameter for a given LE connection 7930 * @param handle 7931 * @param conn_interval_min (unit: 1.25ms) 7932 * @param conn_interval_max (unit: 1.25ms) 7933 * @param conn_latency 7934 * @param supervision_timeout (unit: 10ms) 7935 * @return 0 if ok 7936 */ 7937 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7938 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7939 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7940 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7941 connection->le_conn_interval_min = conn_interval_min; 7942 connection->le_conn_interval_max = conn_interval_max; 7943 connection->le_conn_latency = conn_latency; 7944 connection->le_supervision_timeout = supervision_timeout; 7945 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7946 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7947 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7948 return 0; 7949 } 7950 7951 #ifdef ENABLE_LE_PERIPHERAL 7952 7953 /** 7954 * @brief Set Advertisement Data 7955 * @param advertising_data_length 7956 * @param advertising_data (max 31 octets) 7957 * @note data is not copied, pointer has to stay valid 7958 */ 7959 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7960 hci_stack->le_advertisements_data_len = advertising_data_length; 7961 hci_stack->le_advertisements_data = advertising_data; 7962 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7963 hci_run(); 7964 } 7965 7966 /** 7967 * @brief Set Scan Response Data 7968 * @param advertising_data_length 7969 * @param advertising_data (max 31 octets) 7970 * @note data is not copied, pointer has to stay valid 7971 */ 7972 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7973 hci_stack->le_scan_response_data_len = scan_response_data_length; 7974 hci_stack->le_scan_response_data = scan_response_data; 7975 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7976 hci_run(); 7977 } 7978 7979 /** 7980 * @brief Set Advertisement Parameters 7981 * @param adv_int_min 7982 * @param adv_int_max 7983 * @param adv_type 7984 * @param direct_address_type 7985 * @param direct_address 7986 * @param channel_map 7987 * @param filter_policy 7988 * 7989 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7990 */ 7991 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7992 uint8_t direct_address_typ, bd_addr_t direct_address, 7993 uint8_t channel_map, uint8_t filter_policy) { 7994 7995 hci_stack->le_advertisements_interval_min = adv_int_min; 7996 hci_stack->le_advertisements_interval_max = adv_int_max; 7997 hci_stack->le_advertisements_type = adv_type; 7998 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7999 hci_stack->le_advertisements_channel_map = channel_map; 8000 hci_stack->le_advertisements_filter_policy = filter_policy; 8001 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 8002 6); 8003 8004 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8005 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 8006 hci_run(); 8007 } 8008 8009 /** 8010 * @brief Enable/Disable Advertisements 8011 * @param enabled 8012 */ 8013 void gap_advertisements_enable(int enabled){ 8014 if (enabled == 0){ 8015 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 8016 } else { 8017 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 8018 } 8019 hci_update_advertisements_enabled_for_current_roles(); 8020 hci_run(); 8021 } 8022 8023 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8024 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 8025 btstack_linked_list_iterator_t it; 8026 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 8027 while (btstack_linked_list_iterator_has_next(&it)){ 8028 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 8029 if ( item->advertising_handle == advertising_handle ) { 8030 return item; 8031 } 8032 } 8033 return NULL; 8034 } 8035 8036 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 8037 // find free advertisement handle 8038 uint8_t advertisement_handle; 8039 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 8040 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 8041 } 8042 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8043 // clear 8044 memset(storage, 0, sizeof(le_advertising_set_t)); 8045 // copy params 8046 storage->advertising_handle = advertisement_handle; 8047 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 8048 // add to list 8049 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 8050 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 8051 *out_advertising_handle = advertisement_handle; 8052 // set tasks and start 8053 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8054 hci_run(); 8055 return ERROR_CODE_SUCCESS; 8056 } 8057 8058 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 8059 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8060 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8061 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 8062 // set tasks and start 8063 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8064 hci_run(); 8065 return ERROR_CODE_SUCCESS; 8066 } 8067 8068 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 8069 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8070 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8071 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 8072 return ERROR_CODE_SUCCESS; 8073 } 8074 8075 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 8076 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8077 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8078 memcpy(advertising_set->random_address, random_address, 6); 8079 // set tasks and start 8080 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 8081 hci_run(); 8082 return ERROR_CODE_SUCCESS; 8083 } 8084 8085 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 8086 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8087 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8088 advertising_set->adv_data = advertising_data; 8089 advertising_set->adv_data_len = advertising_data_length; 8090 // set tasks and start 8091 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 8092 hci_run(); 8093 return ERROR_CODE_SUCCESS; 8094 } 8095 8096 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){ 8097 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8098 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8099 advertising_set->scan_data = scan_response_data; 8100 advertising_set->scan_data_len = scan_response_data_length; 8101 // set tasks and start 8102 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 8103 hci_run(); 8104 return ERROR_CODE_SUCCESS; 8105 } 8106 8107 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 8108 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8109 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8110 advertising_set->enable_timeout = timeout; 8111 advertising_set->enable_max_scan_events = num_extended_advertising_events; 8112 // set tasks and start 8113 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 8114 hci_run(); 8115 return ERROR_CODE_SUCCESS; 8116 } 8117 8118 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 8119 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8120 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8121 // set tasks and start 8122 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 8123 hci_run(); 8124 return ERROR_CODE_SUCCESS; 8125 } 8126 8127 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 8128 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8129 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8130 // set tasks and start 8131 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 8132 hci_run(); 8133 return ERROR_CODE_SUCCESS; 8134 } 8135 8136 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 8137 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 8138 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8139 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8140 // periodic advertising requires neither connectable, scannable, legacy or anonymous 8141 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8142 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 8143 // set tasks and start 8144 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 8145 hci_run(); 8146 return ERROR_CODE_SUCCESS; 8147 } 8148 8149 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 8150 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8151 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8152 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 8153 return ERROR_CODE_SUCCESS; 8154 } 8155 8156 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 8157 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8158 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8159 advertising_set->periodic_data = periodic_data; 8160 advertising_set->periodic_data_len = periodic_data_length; 8161 // set tasks and start 8162 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 8163 hci_run(); 8164 return ERROR_CODE_SUCCESS; 8165 } 8166 8167 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 8168 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8169 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8170 // set tasks and start 8171 advertising_set->periodic_include_adi = include_adi; 8172 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 8173 hci_run(); 8174 return ERROR_CODE_SUCCESS; 8175 } 8176 8177 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 8178 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 8179 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8180 // set tasks and start 8181 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 8182 hci_run(); 8183 return ERROR_CODE_SUCCESS; 8184 } 8185 8186 uint8_t gap_periodic_advertising_sync_transfer_set_default_parameters(uint8_t mode, uint16_t skip, uint16_t sync_timeout, uint8_t cte_type){ 8187 hci_stack->le_past_mode = mode; 8188 hci_stack->le_past_skip = skip; 8189 hci_stack->le_past_sync_timeout = sync_timeout; 8190 hci_stack->le_past_cte_type = cte_type; 8191 hci_stack->le_past_set_default_params = true; 8192 hci_run(); 8193 return ERROR_CODE_SUCCESS; 8194 } 8195 8196 uint8_t gap_periodic_advertising_sync_transfer_send(hci_con_handle_t con_handle, uint16_t service_data, hci_con_handle_t sync_handle){ 8197 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8198 if (hci_connection == NULL){ 8199 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8200 } 8201 hci_connection->le_past_sync_handle = sync_handle; 8202 hci_connection->le_past_service_data = service_data; 8203 hci_run(); 8204 return ERROR_CODE_SUCCESS; 8205 } 8206 8207 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 8208 8209 #endif 8210 8211 #endif 8212 8213 void hci_le_set_own_address_type(uint8_t own_address_type){ 8214 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 8215 if (own_address_type == hci_stack->le_own_addr_type) return; 8216 hci_stack->le_own_addr_type = own_address_type; 8217 8218 #ifdef ENABLE_LE_PERIPHERAL 8219 // update advertisement parameters, too 8220 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 8221 hci_run(); 8222 #endif 8223 #ifdef ENABLE_LE_CENTRAL 8224 // note: we don't update scan parameters or modify ongoing connection attempts 8225 #endif 8226 } 8227 8228 void hci_le_random_address_set(const bd_addr_t random_address){ 8229 memcpy(hci_stack->le_random_address, random_address, 6); 8230 hci_stack->le_random_address_set = true; 8231 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 8232 hci_run(); 8233 } 8234 8235 #endif 8236 8237 uint8_t gap_disconnect(hci_con_handle_t handle){ 8238 hci_connection_t * conn = hci_connection_for_handle(handle); 8239 if (!conn){ 8240 hci_emit_disconnection_complete(handle, 0); 8241 return 0; 8242 } 8243 // ignore if already disconnected 8244 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 8245 return 0; 8246 } 8247 conn->state = SEND_DISCONNECT; 8248 hci_run(); 8249 return 0; 8250 } 8251 8252 int gap_read_rssi(hci_con_handle_t con_handle){ 8253 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8254 if (hci_connection == NULL) return 0; 8255 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 8256 hci_run(); 8257 return 1; 8258 } 8259 8260 /** 8261 * @brief Get connection type 8262 * @param con_handle 8263 * @result connection_type 8264 */ 8265 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 8266 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 8267 if (!conn) return GAP_CONNECTION_INVALID; 8268 switch (conn->address_type){ 8269 case BD_ADDR_TYPE_LE_PUBLIC: 8270 case BD_ADDR_TYPE_LE_RANDOM: 8271 return GAP_CONNECTION_LE; 8272 case BD_ADDR_TYPE_SCO: 8273 return GAP_CONNECTION_SCO; 8274 case BD_ADDR_TYPE_ACL: 8275 return GAP_CONNECTION_ACL; 8276 default: 8277 return GAP_CONNECTION_INVALID; 8278 } 8279 } 8280 8281 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 8282 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 8283 if (!conn) return HCI_ROLE_INVALID; 8284 return (hci_role_t) conn->role; 8285 } 8286 8287 8288 #ifdef ENABLE_CLASSIC 8289 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 8290 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8291 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8292 conn->request_role = role; 8293 hci_run(); 8294 return ERROR_CODE_SUCCESS; 8295 } 8296 #endif 8297 8298 #ifdef ENABLE_BLE 8299 8300 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){ 8301 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8302 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8303 8304 conn->le_phy_update_all_phys = all_phys; 8305 conn->le_phy_update_tx_phys = tx_phys; 8306 conn->le_phy_update_rx_phys = rx_phys; 8307 conn->le_phy_update_phy_options = phy_options; 8308 8309 hci_run(); 8310 8311 return 0; 8312 } 8313 8314 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8315 // check if already in list 8316 btstack_linked_list_iterator_t it; 8317 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8318 while (btstack_linked_list_iterator_has_next(&it)) { 8319 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 8320 if (entry->address_type != address_type) { 8321 continue; 8322 } 8323 if (memcmp(entry->address, address, 6) != 0) { 8324 continue; 8325 } 8326 // disallow if already scheduled to add 8327 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 8328 return ERROR_CODE_COMMAND_DISALLOWED; 8329 } 8330 // still on controller, but scheduled to remove -> re-add 8331 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 8332 return ERROR_CODE_SUCCESS; 8333 } 8334 // alloc and add to list 8335 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 8336 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8337 entry->address_type = address_type; 8338 (void)memcpy(entry->address, address, 6); 8339 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 8340 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 8341 return ERROR_CODE_SUCCESS; 8342 } 8343 8344 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8345 btstack_linked_list_iterator_t it; 8346 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8347 while (btstack_linked_list_iterator_has_next(&it)){ 8348 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8349 if (entry->address_type != address_type) { 8350 continue; 8351 } 8352 if (memcmp(entry->address, address, 6) != 0) { 8353 continue; 8354 } 8355 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8356 // remove from controller if already present 8357 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8358 } else { 8359 // directly remove entry from whitelist 8360 btstack_linked_list_iterator_remove(&it); 8361 btstack_memory_whitelist_entry_free(entry); 8362 } 8363 return ERROR_CODE_SUCCESS; 8364 } 8365 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8366 } 8367 8368 static void hci_whitelist_clear(void){ 8369 btstack_linked_list_iterator_t it; 8370 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8371 while (btstack_linked_list_iterator_has_next(&it)){ 8372 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8373 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8374 // remove from controller if already present 8375 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8376 continue; 8377 } 8378 // directly remove entry from whitelist 8379 btstack_linked_list_iterator_remove(&it); 8380 btstack_memory_whitelist_entry_free(entry); 8381 } 8382 } 8383 8384 // free all entries unconditionally 8385 static void hci_whitelist_free(void){ 8386 btstack_linked_list_iterator_t lit; 8387 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 8388 while (btstack_linked_list_iterator_has_next(&lit)){ 8389 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 8390 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 8391 btstack_memory_whitelist_entry_free(entry); 8392 } 8393 } 8394 8395 /** 8396 * @brief Clear Whitelist 8397 * @return 0 if ok 8398 */ 8399 uint8_t gap_whitelist_clear(void){ 8400 hci_whitelist_clear(); 8401 hci_run(); 8402 return ERROR_CODE_SUCCESS; 8403 } 8404 8405 /** 8406 * @brief Add Device to Whitelist 8407 * @param address_typ 8408 * @param address 8409 * @return 0 if ok 8410 */ 8411 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8412 uint8_t status = hci_whitelist_add(address_type, address); 8413 if (status){ 8414 return status; 8415 } 8416 hci_run(); 8417 return ERROR_CODE_SUCCESS; 8418 } 8419 8420 /** 8421 * @brief Remove Device from Whitelist 8422 * @param address_typ 8423 * @param address 8424 * @return 0 if ok 8425 */ 8426 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8427 uint8_t status = hci_whitelist_remove(address_type, address); 8428 if (status){ 8429 return status; 8430 } 8431 hci_run(); 8432 return ERROR_CODE_SUCCESS; 8433 } 8434 8435 #ifdef ENABLE_LE_CENTRAL 8436 /** 8437 * @brief Connect with Whitelist 8438 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 8439 * @return - if ok 8440 */ 8441 uint8_t gap_connect_with_whitelist(void){ 8442 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 8443 return ERROR_CODE_COMMAND_DISALLOWED; 8444 } 8445 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8446 hci_run(); 8447 return ERROR_CODE_SUCCESS; 8448 } 8449 8450 /** 8451 * @brief Auto Connection Establishment - Start Connecting to device 8452 * @param address_typ 8453 * @param address 8454 * @return 0 if ok 8455 */ 8456 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 8457 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8458 return ERROR_CODE_COMMAND_DISALLOWED; 8459 } 8460 8461 uint8_t status = hci_whitelist_add(address_type, address); 8462 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 8463 return status; 8464 } 8465 8466 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8467 8468 hci_run(); 8469 return ERROR_CODE_SUCCESS; 8470 } 8471 8472 /** 8473 * @brief Auto Connection Establishment - Stop Connecting to device 8474 * @param address_typ 8475 * @param address 8476 * @return 0 if ok 8477 */ 8478 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 8479 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8480 return ERROR_CODE_COMMAND_DISALLOWED; 8481 } 8482 8483 hci_whitelist_remove(address_type, address); 8484 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 8485 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8486 } 8487 hci_run(); 8488 return 0; 8489 } 8490 8491 /** 8492 * @brief Auto Connection Establishment - Stop everything 8493 * @note Convenience function to stop all active auto connection attempts 8494 */ 8495 uint8_t gap_auto_connection_stop_all(void){ 8496 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 8497 return ERROR_CODE_COMMAND_DISALLOWED; 8498 } 8499 hci_whitelist_clear(); 8500 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8501 hci_run(); 8502 return ERROR_CODE_SUCCESS; 8503 } 8504 8505 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 8506 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8507 if (!conn) return 0; 8508 return conn->le_connection_interval; 8509 } 8510 #endif 8511 #endif 8512 8513 #ifdef ENABLE_CLASSIC 8514 /** 8515 * @brief Set Extended Inquiry Response data 8516 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 8517 * @note has to be done before stack starts up 8518 */ 8519 void gap_set_extended_inquiry_response(const uint8_t * data){ 8520 hci_stack->eir_data = data; 8521 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 8522 hci_run(); 8523 } 8524 8525 /** 8526 * @brief Start GAP Classic Inquiry 8527 * @param duration in 1.28s units 8528 * @return 0 if ok 8529 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 8530 */ 8531 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 8532 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8533 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8534 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 8535 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8536 } 8537 hci_stack->inquiry_state = duration_in_1280ms_units; 8538 hci_stack->inquiry_max_period_length = 0; 8539 hci_stack->inquiry_min_period_length = 0; 8540 hci_run(); 8541 return 0; 8542 } 8543 8544 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 8545 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8546 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8547 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8548 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8549 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8550 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8551 8552 hci_stack->inquiry_state = duration; 8553 hci_stack->inquiry_max_period_length = max_period_length; 8554 hci_stack->inquiry_min_period_length = min_period_length; 8555 hci_run(); 8556 return 0; 8557 } 8558 8559 /** 8560 * @brief Stop GAP Classic Inquiry 8561 * @return 0 if ok 8562 */ 8563 int gap_inquiry_stop(void){ 8564 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 8565 // emit inquiry complete event, before it even started 8566 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 8567 hci_emit_event(event, sizeof(event), 1); 8568 return 0; 8569 } 8570 switch (hci_stack->inquiry_state){ 8571 case GAP_INQUIRY_STATE_ACTIVE: 8572 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 8573 hci_run(); 8574 return ERROR_CODE_SUCCESS; 8575 case GAP_INQUIRY_STATE_PERIODIC: 8576 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 8577 hci_run(); 8578 return ERROR_CODE_SUCCESS; 8579 default: 8580 return ERROR_CODE_COMMAND_DISALLOWED; 8581 } 8582 } 8583 8584 void gap_inquiry_set_lap(uint32_t lap){ 8585 hci_stack->inquiry_lap = lap; 8586 } 8587 8588 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 8589 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 8590 hci_stack->inquiry_scan_window = inquiry_scan_window; 8591 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 8592 hci_run(); 8593 } 8594 8595 8596 /** 8597 * @brief Remote Name Request 8598 * @param addr 8599 * @param page_scan_repetition_mode 8600 * @param clock_offset only used when bit 15 is set 8601 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 8602 */ 8603 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 8604 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8605 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 8606 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 8607 hci_stack->remote_name_clock_offset = clock_offset; 8608 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 8609 hci_run(); 8610 return 0; 8611 } 8612 8613 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 8614 hci_stack->gap_pairing_state = state; 8615 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 8616 hci_run(); 8617 return 0; 8618 } 8619 8620 /** 8621 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 8622 * @param addr 8623 * @param pin_data 8624 * @param pin_len 8625 * @return 0 if ok 8626 */ 8627 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 8628 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8629 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 8630 hci_stack->gap_pairing_pin_len = pin_len; 8631 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 8632 } 8633 8634 /** 8635 * @brief Legacy Pairing Pin Code Response 8636 * @param addr 8637 * @param pin 8638 * @return 0 if ok 8639 */ 8640 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 8641 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, (uint8_t) strlen(pin)); 8642 } 8643 8644 /** 8645 * @brief Abort Legacy Pairing 8646 * @param addr 8647 * @param pin 8648 * @return 0 if ok 8649 */ 8650 int gap_pin_code_negative(bd_addr_t addr){ 8651 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8652 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 8653 } 8654 8655 /** 8656 * @brief SSP Passkey Response 8657 * @param addr 8658 * @param passkey 8659 * @return 0 if ok 8660 */ 8661 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 8662 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8663 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 8664 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 8665 } 8666 8667 /** 8668 * @brief Abort SSP Passkey Entry/Pairing 8669 * @param addr 8670 * @param pin 8671 * @return 0 if ok 8672 */ 8673 int gap_ssp_passkey_negative(const bd_addr_t addr){ 8674 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8675 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 8676 } 8677 8678 /** 8679 * @brief Accept SSP Numeric Comparison 8680 * @param addr 8681 * @param passkey 8682 * @return 0 if ok 8683 */ 8684 int gap_ssp_confirmation_response(const bd_addr_t addr){ 8685 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8686 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 8687 } 8688 8689 /** 8690 * @brief Abort SSP Numeric Comparison/Pairing 8691 * @param addr 8692 * @param pin 8693 * @return 0 if ok 8694 */ 8695 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 8696 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8697 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 8698 } 8699 8700 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 8701 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 8702 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8703 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8704 connectionSetAuthenticationFlags(conn, flag); 8705 hci_run(); 8706 return ERROR_CODE_SUCCESS; 8707 } 8708 #endif 8709 8710 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 8711 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 8712 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 8713 } 8714 8715 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 8716 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 8717 } 8718 #endif 8719 8720 #ifdef ENABLE_CLASSIC_PAIRING_OOB 8721 /** 8722 * @brief Report Remote OOB Data 8723 * @param bd_addr 8724 * @param c_192 Simple Pairing Hash C derived from P-192 public key 8725 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 8726 * @param c_256 Simple Pairing Hash C derived from P-256 public key 8727 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 8728 */ 8729 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){ 8730 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8731 if (connection == NULL) { 8732 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8733 } 8734 connection->classic_oob_c_192 = c_192; 8735 connection->classic_oob_r_192 = r_192; 8736 8737 // ignore P-256 if not supported by us 8738 if (hci_stack->secure_connections_active){ 8739 connection->classic_oob_c_256 = c_256; 8740 connection->classic_oob_r_256 = r_256; 8741 } 8742 8743 return ERROR_CODE_SUCCESS; 8744 } 8745 /** 8746 * @brief Generate new OOB data 8747 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 8748 */ 8749 void gap_ssp_generate_oob_data(void){ 8750 hci_stack->classic_read_local_oob_data = true; 8751 hci_run(); 8752 } 8753 8754 #endif 8755 8756 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 8757 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 8758 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8759 if (connection == NULL) { 8760 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8761 } 8762 8763 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 8764 connection->link_key_type = type; 8765 8766 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 8767 } 8768 8769 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 8770 /** 8771 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 8772 * @param inquiry_mode see bluetooth_defines.h 8773 */ 8774 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8775 hci_stack->inquiry_mode = inquiry_mode; 8776 } 8777 8778 /** 8779 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8780 */ 8781 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8782 hci_stack->sco_voice_setting = voice_setting; 8783 } 8784 8785 /** 8786 * @brief Get SCO Voice Setting 8787 * @return current voice setting 8788 */ 8789 uint16_t hci_get_sco_voice_setting(void){ 8790 return hci_stack->sco_voice_setting; 8791 } 8792 8793 static int hci_have_usb_transport(void){ 8794 if (!hci_stack->hci_transport) return 0; 8795 const char * transport_name = hci_stack->hci_transport->name; 8796 if (!transport_name) return 0; 8797 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8798 } 8799 8800 /** @brief Get SCO packet length for current SCO Voice setting 8801 * @note Using SCO packets of the exact length is required for USB transfer 8802 * @return Length of SCO packets in bytes (not audio frames) 8803 */ 8804 uint16_t hci_get_sco_packet_length(void){ 8805 uint16_t sco_packet_length = 0; 8806 8807 #ifdef ENABLE_SCO_OVER_HCI 8808 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8809 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8810 8811 if (hci_have_usb_transport()){ 8812 // see Core Spec for H2 USB Transfer. 8813 // 3 byte SCO header + 24 bytes per connection 8814 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8815 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8816 } else { 8817 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8818 sco_packet_length = 3 + 60 * multiplier; 8819 // assert that it still fits inside an SCO buffer 8820 if (sco_packet_length > (hci_stack->sco_data_packet_length + 3)){ 8821 sco_packet_length = 3 + 60; 8822 } 8823 } 8824 #endif 8825 8826 #ifdef HAVE_SCO_TRANSPORT 8827 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8828 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8829 sco_packet_length = 3 + 60 * multiplier; 8830 #endif 8831 return sco_packet_length; 8832 } 8833 8834 /** 8835 * @brief Sets the master/slave policy 8836 * @param policy (0: attempt to become master, 1: let connecting device decide) 8837 */ 8838 void hci_set_master_slave_policy(uint8_t policy){ 8839 hci_stack->master_slave_policy = policy; 8840 } 8841 8842 #endif 8843 8844 HCI_STATE hci_get_state(void){ 8845 return hci_stack->state; 8846 } 8847 8848 #ifdef ENABLE_CLASSIC 8849 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8850 hci_stack->gap_classic_accept_callback = accept_callback; 8851 } 8852 #endif 8853 8854 /** 8855 * @brief Set callback for Bluetooth Hardware Error 8856 */ 8857 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8858 hci_stack->hardware_error_callback = fn; 8859 } 8860 8861 void hci_disconnect_all(void){ 8862 btstack_linked_list_iterator_t it; 8863 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8864 while (btstack_linked_list_iterator_has_next(&it)){ 8865 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8866 if (con->state == SENT_DISCONNECT) continue; 8867 con->state = SEND_DISCONNECT; 8868 } 8869 hci_run(); 8870 } 8871 8872 uint16_t hci_get_manufacturer(void){ 8873 return hci_stack->manufacturer; 8874 } 8875 8876 #ifdef ENABLE_BLE 8877 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8878 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8879 if (!hci_con) return NULL; 8880 return &hci_con->sm_connection; 8881 } 8882 8883 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8884 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8885 #endif 8886 8887 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8888 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8889 if (hci_connection == NULL) return 0; 8890 if (hci_is_le_connection(hci_connection)){ 8891 #ifdef ENABLE_BLE 8892 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8893 if (sm_conn->sm_connection_encrypted) { 8894 return sm_conn->sm_actual_encryption_key_size; 8895 } 8896 #endif 8897 } else { 8898 #ifdef ENABLE_CLASSIC 8899 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8900 return hci_connection->encryption_key_size; 8901 } 8902 #endif 8903 } 8904 return 0; 8905 } 8906 8907 bool gap_authenticated(hci_con_handle_t con_handle){ 8908 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8909 if (hci_connection == NULL) return false; 8910 8911 switch (hci_connection->address_type){ 8912 #ifdef ENABLE_BLE 8913 case BD_ADDR_TYPE_LE_PUBLIC: 8914 case BD_ADDR_TYPE_LE_RANDOM: 8915 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8916 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8917 #endif 8918 #ifdef ENABLE_CLASSIC 8919 case BD_ADDR_TYPE_SCO: 8920 case BD_ADDR_TYPE_ACL: 8921 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8922 #endif 8923 default: 8924 return false; 8925 } 8926 } 8927 8928 bool gap_secure_connection(hci_con_handle_t con_handle){ 8929 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8930 if (hci_connection == NULL) return 0; 8931 8932 switch (hci_connection->address_type){ 8933 #ifdef ENABLE_BLE 8934 case BD_ADDR_TYPE_LE_PUBLIC: 8935 case BD_ADDR_TYPE_LE_RANDOM: 8936 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8937 return hci_connection->sm_connection.sm_connection_sc != 0; 8938 #endif 8939 #ifdef ENABLE_CLASSIC 8940 case BD_ADDR_TYPE_SCO: 8941 case BD_ADDR_TYPE_ACL: 8942 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8943 #endif 8944 default: 8945 return false; 8946 } 8947 } 8948 8949 bool gap_bonded(hci_con_handle_t con_handle){ 8950 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8951 if (hci_connection == NULL) return 0; 8952 8953 #ifdef ENABLE_CLASSIC 8954 link_key_t link_key; 8955 link_key_type_t link_key_type; 8956 #endif 8957 switch (hci_connection->address_type){ 8958 #ifdef ENABLE_BLE 8959 case BD_ADDR_TYPE_LE_PUBLIC: 8960 case BD_ADDR_TYPE_LE_RANDOM: 8961 return hci_connection->sm_connection.sm_le_db_index >= 0; 8962 #endif 8963 #ifdef ENABLE_CLASSIC 8964 case BD_ADDR_TYPE_SCO: 8965 case BD_ADDR_TYPE_ACL: 8966 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8967 #endif 8968 default: 8969 return false; 8970 } 8971 } 8972 8973 #ifdef ENABLE_BLE 8974 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8975 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8976 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8977 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8978 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8979 return sm_conn->sm_connection_authorization_state; 8980 } 8981 #endif 8982 8983 #ifdef ENABLE_CLASSIC 8984 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){ 8985 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8986 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8987 conn->sniff_min_interval = sniff_min_interval; 8988 conn->sniff_max_interval = sniff_max_interval; 8989 conn->sniff_attempt = sniff_attempt; 8990 conn->sniff_timeout = sniff_timeout; 8991 hci_run(); 8992 return 0; 8993 } 8994 8995 /** 8996 * @brief Exit Sniff mode 8997 * @param con_handle 8998 @ @return 0 if ok 8999 */ 9000 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 9001 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9002 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9003 conn->sniff_min_interval = 0xffff; 9004 hci_run(); 9005 return 0; 9006 } 9007 9008 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){ 9009 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9010 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9011 conn->sniff_subrating_max_latency = max_latency; 9012 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 9013 conn->sniff_subrating_min_local_timeout = min_local_timeout; 9014 hci_run(); 9015 return ERROR_CODE_SUCCESS; 9016 } 9017 9018 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){ 9019 hci_connection_t * conn = hci_connection_for_handle(con_handle); 9020 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9021 conn->qos_service_type = service_type; 9022 conn->qos_token_rate = token_rate; 9023 conn->qos_peak_bandwidth = peak_bandwidth; 9024 conn->qos_latency = latency; 9025 conn->qos_delay_variation = delay_variation; 9026 hci_run(); 9027 return ERROR_CODE_SUCCESS; 9028 } 9029 9030 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 9031 hci_stack->new_page_scan_interval = page_scan_interval; 9032 hci_stack->new_page_scan_window = page_scan_window; 9033 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 9034 hci_run(); 9035 } 9036 9037 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 9038 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 9039 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 9040 hci_run(); 9041 } 9042 9043 void gap_set_page_timeout(uint16_t page_timeout){ 9044 hci_stack->page_timeout = page_timeout; 9045 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 9046 hci_run(); 9047 } 9048 9049 #endif 9050 9051 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 9052 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 9053 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 9054 if (le_device_db_index >= le_device_db_max_count()) return; 9055 uint8_t offset = le_device_db_index >> 3; 9056 uint8_t mask = 1 << (le_device_db_index & 7); 9057 hci_stack->le_resolving_list_add_entries[offset] |= mask; 9058 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 9059 // note: go back to remove entries, otherwise, a remove + add will skip the add 9060 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 9061 } 9062 } 9063 9064 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 9065 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 9066 if (le_device_db_index >= le_device_db_max_count()) return; 9067 uint8_t offset = le_device_db_index >> 3; 9068 uint8_t mask = 1 << (le_device_db_index & 7); 9069 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 9070 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 9071 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 9072 } 9073 } 9074 9075 uint8_t gap_load_resolving_list_from_le_device_db(void){ 9076 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 9077 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 9078 } 9079 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 9080 // restart le resolving list update 9081 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 9082 } 9083 return ERROR_CODE_SUCCESS; 9084 } 9085 #endif 9086 9087 #ifdef ENABLE_BLE 9088 #ifdef ENABLE_LE_CENTRAL 9089 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 9090 9091 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9092 // check if already in list 9093 btstack_linked_list_iterator_t it; 9094 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9095 while (btstack_linked_list_iterator_has_next(&it)) { 9096 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 9097 if (entry->sid != advertising_sid) { 9098 continue; 9099 } 9100 if (entry->address_type != address_type) { 9101 continue; 9102 } 9103 if (memcmp(entry->address, address, 6) != 0) { 9104 continue; 9105 } 9106 // disallow if already scheduled to add 9107 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 9108 return ERROR_CODE_COMMAND_DISALLOWED; 9109 } 9110 // still on controller, but scheduled to remove -> re-add 9111 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 9112 return ERROR_CODE_SUCCESS; 9113 } 9114 // alloc and add to list 9115 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 9116 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 9117 entry->sid = advertising_sid; 9118 entry->address_type = address_type; 9119 (void)memcpy(entry->address, address, 6); 9120 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 9121 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 9122 return ERROR_CODE_SUCCESS; 9123 } 9124 9125 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9126 btstack_linked_list_iterator_t it; 9127 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9128 while (btstack_linked_list_iterator_has_next(&it)){ 9129 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 9130 if (entry->sid != advertising_sid) { 9131 continue; 9132 } 9133 if (entry->address_type != address_type) { 9134 continue; 9135 } 9136 if (memcmp(entry->address, address, 6) != 0) { 9137 continue; 9138 } 9139 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 9140 // remove from controller if already present 9141 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 9142 } else { 9143 // directly remove entry from whitelist 9144 btstack_linked_list_iterator_remove(&it); 9145 btstack_memory_periodic_advertiser_list_entry_free(entry); 9146 } 9147 return ERROR_CODE_SUCCESS; 9148 } 9149 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9150 } 9151 9152 static void hci_periodic_advertiser_list_clear(void){ 9153 btstack_linked_list_iterator_t it; 9154 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 9155 while (btstack_linked_list_iterator_has_next(&it)){ 9156 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 9157 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 9158 // remove from controller if already present 9159 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 9160 continue; 9161 } 9162 // directly remove entry from whitelist 9163 btstack_linked_list_iterator_remove(&it); 9164 btstack_memory_periodic_advertiser_list_entry_free(entry); 9165 } 9166 } 9167 9168 // free all entries unconditionally 9169 static void hci_periodic_advertiser_list_free(void){ 9170 btstack_linked_list_iterator_t lit; 9171 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 9172 while (btstack_linked_list_iterator_has_next(&lit)){ 9173 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 9174 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 9175 btstack_memory_periodic_advertiser_list_entry_free(entry); 9176 } 9177 } 9178 9179 uint8_t gap_periodic_advertiser_list_clear(void){ 9180 hci_periodic_advertiser_list_clear(); 9181 hci_run(); 9182 return ERROR_CODE_SUCCESS; 9183 } 9184 9185 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9186 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 9187 if (status){ 9188 return status; 9189 } 9190 hci_run(); 9191 return ERROR_CODE_SUCCESS; 9192 } 9193 9194 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 9195 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 9196 if (status){ 9197 return status; 9198 } 9199 hci_run(); 9200 return ERROR_CODE_SUCCESS; 9201 } 9202 9203 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 9204 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 9205 // abort if already active 9206 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 9207 return ERROR_CODE_COMMAND_DISALLOWED; 9208 } 9209 // store request 9210 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 9211 hci_stack->le_periodic_sync_options = options; 9212 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 9213 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 9214 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 9215 hci_stack->le_periodic_sync_skip = skip; 9216 hci_stack->le_periodic_sync_timeout = sync_timeout; 9217 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 9218 9219 hci_run(); 9220 return ERROR_CODE_SUCCESS; 9221 } 9222 9223 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 9224 // abort if not requested 9225 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 9226 return ERROR_CODE_COMMAND_DISALLOWED; 9227 } 9228 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 9229 hci_run(); 9230 return ERROR_CODE_SUCCESS; 9231 } 9232 9233 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 9234 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 9235 return ERROR_CODE_COMMAND_DISALLOWED; 9236 } 9237 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 9238 hci_run(); 9239 return ERROR_CODE_SUCCESS; 9240 } 9241 9242 #endif 9243 #endif 9244 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 9245 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id, 9246 hci_iso_stream_state_t state) { 9247 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 9248 if (iso_stream == NULL){ 9249 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 9250 } else { 9251 iso_stream->iso_type = iso_type; 9252 iso_stream->state = state; 9253 iso_stream->con_handle = con_handle; 9254 iso_stream->group_id = group_id; 9255 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 9256 return ERROR_CODE_SUCCESS; 9257 } 9258 } 9259 9260 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle){ 9261 btstack_linked_list_iterator_t it; 9262 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9263 while (btstack_linked_list_iterator_has_next(&it)){ 9264 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9265 if (iso_stream->con_handle == con_handle ) { 9266 return iso_stream; 9267 } 9268 } 9269 return NULL; 9270 } 9271 9272 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 9273 log_info("hci_iso_stream_finalize con_handle 0x%04x, group_id 0x%02x", iso_stream->con_handle, iso_stream->group_id); 9274 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 9275 btstack_memory_hci_iso_stream_free(iso_stream); 9276 } 9277 9278 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id) { 9279 btstack_linked_list_iterator_t it; 9280 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9281 while (btstack_linked_list_iterator_has_next(&it)){ 9282 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9283 if ((iso_stream->group_id == group_id) && 9284 (iso_stream->iso_type == iso_type)){ 9285 btstack_linked_list_iterator_remove(&it); 9286 btstack_memory_hci_iso_stream_free(iso_stream); 9287 } 9288 } 9289 } 9290 9291 static void hci_iso_stream_requested_finalize(uint8_t group_id) { 9292 btstack_linked_list_iterator_t it; 9293 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9294 while (btstack_linked_list_iterator_has_next(&it)){ 9295 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9296 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 9297 (iso_stream->group_id == group_id)){ 9298 btstack_linked_list_iterator_remove(&it); 9299 btstack_memory_hci_iso_stream_free(iso_stream); 9300 } 9301 } 9302 } 9303 static void hci_iso_stream_requested_confirm(uint8_t big_handle){ 9304 btstack_linked_list_iterator_t it; 9305 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9306 while (btstack_linked_list_iterator_has_next(&it)){ 9307 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9308 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 9309 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 9310 } 9311 } 9312 } 9313 9314 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 9315 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 9316 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 9317 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 9318 return (sdu_len_offset + 2 + sdu_len) == size; 9319 } 9320 9321 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 9322 if (hci_stack->iso_packet_handler == NULL) { 9323 return; 9324 } 9325 if (size < 4) { 9326 return; 9327 } 9328 9329 // parse header 9330 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 9331 uint16_t iso_data_len = little_endian_read_16(packet, 2); 9332 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 9333 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_handle); 9334 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 9335 9336 // assert packet is complete 9337 if ((iso_data_len + 4u) != size){ 9338 return; 9339 } 9340 9341 if ((pb_flag & 0x01) == 0){ 9342 if (pb_flag == 0x02){ 9343 // The ISO_Data_Load field contains a header and a complete SDU. 9344 if (hci_iso_sdu_complete(packet, size)) { 9345 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 9346 } 9347 } else { 9348 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 9349 if (iso_stream == NULL){ 9350 return; 9351 } 9352 if (size > HCI_ISO_PAYLOAD_SIZE){ 9353 return; 9354 } 9355 memcpy(iso_stream->reassembly_buffer, packet, size); 9356 // fix pb_flag 9357 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 9358 iso_stream->reassembly_pos = size; 9359 } 9360 } else { 9361 // iso_data_load contains continuation or last fragment of an SDU 9362 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 9363 if (ts_flag != 0){ 9364 return; 9365 } 9366 // append fragment 9367 if (iso_stream == NULL){ 9368 return; 9369 } 9370 if (iso_stream->reassembly_pos == 0){ 9371 return; 9372 } 9373 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 9374 // reset reassembly buffer 9375 iso_stream->reassembly_pos = 0; 9376 return; 9377 } 9378 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 9379 iso_stream->reassembly_pos += iso_data_len; 9380 9381 // deliver if last fragment and SDU complete 9382 if (pb_flag == 0x03){ 9383 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 9384 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 9385 } 9386 iso_stream->reassembly_pos = 0; 9387 } 9388 } 9389 } 9390 9391 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status){ 9392 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9393 uint16_t pos = 0; 9394 event[pos++] = HCI_EVENT_META_GAP; 9395 event[pos++] = 4 + (2 * big->num_bis); 9396 event[pos++] = GAP_SUBEVENT_BIG_CREATED; 9397 event[pos++] = status; 9398 event[pos++] = big->big_handle; 9399 event[pos++] = big->num_bis; 9400 uint8_t i; 9401 for (i=0;i<big->num_bis;i++){ 9402 little_endian_store_16(event, pos, big->bis_con_handles[i]); 9403 pos += 2; 9404 } 9405 hci_emit_event(event, pos, 0); 9406 } 9407 9408 static void hci_emit_cig_created(const le_audio_cig_t * cig, uint8_t status){ 9409 uint8_t event [6 + (MAX_NR_CIS * 2)]; 9410 uint16_t pos = 0; 9411 event[pos++] = HCI_EVENT_META_GAP; 9412 event[pos++] = 4 + (2 * cig->num_cis); 9413 event[pos++] = GAP_SUBEVENT_CIG_CREATED; 9414 event[pos++] = status; 9415 event[pos++] = cig->cig_id; 9416 event[pos++] = cig->num_cis; 9417 uint8_t i; 9418 for (i=0;i<cig->num_cis;i++){ 9419 little_endian_store_16(event, pos, cig->cis_con_handles[i]); 9420 pos += 2; 9421 } 9422 hci_emit_event(event, pos, 0); 9423 } 9424 9425 static void 9426 hci_emit_cis_created(uint8_t cig_id, hci_con_handle_t cis_con_handle, uint8_t status) { 9427 uint8_t event [7]; 9428 uint16_t pos = 0; 9429 event[pos++] = HCI_EVENT_META_GAP; 9430 event[pos++] = 5; 9431 event[pos++] = GAP_SUBEVENT_CIS_CREATED; 9432 event[pos++] = status; 9433 event[pos++] = cig_id; 9434 little_endian_store_16(event, pos, cis_con_handle); 9435 pos += 2; 9436 hci_emit_event(event, pos, 0); 9437 } 9438 9439 static void hci_emit_big_terminated(const le_audio_big_t * big){ 9440 uint8_t event [4]; 9441 uint16_t pos = 0; 9442 event[pos++] = HCI_EVENT_META_GAP; 9443 event[pos++] = 2; 9444 event[pos++] = GAP_SUBEVENT_BIG_TERMINATED; 9445 event[pos++] = big->big_handle; 9446 hci_emit_event(event, pos, 0); 9447 } 9448 9449 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, 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; 9454 event[pos++] = GAP_SUBEVENT_BIG_SYNC_CREATED; 9455 event[pos++] = status; 9456 event[pos++] = big_sync->big_handle; 9457 event[pos++] = big_sync->num_bis; 9458 uint8_t i; 9459 for (i=0;i<big_sync->num_bis;i++){ 9460 little_endian_store_16(event, pos, big_sync->bis_con_handles[i]); 9461 pos += 2; 9462 } 9463 hci_emit_event(event, pos, 0); 9464 } 9465 9466 static void hci_emit_big_sync_stopped(uint8_t big_handle){ 9467 uint8_t event [4]; 9468 uint16_t pos = 0; 9469 event[pos++] = HCI_EVENT_META_GAP; 9470 event[pos++] = 2; 9471 event[pos++] = GAP_SUBEVENT_BIG_SYNC_STOPPED; 9472 event[pos++] = big_handle; 9473 hci_emit_event(event, pos, 0); 9474 } 9475 9476 static void hci_emit_bis_can_send_now(const le_audio_big_t *big, uint8_t bis_index) { 9477 uint8_t event[6]; 9478 uint16_t pos = 0; 9479 event[pos++] = HCI_EVENT_BIS_CAN_SEND_NOW; 9480 event[pos++] = sizeof(event) - 2; 9481 event[pos++] = big->big_handle; 9482 event[pos++] = bis_index; 9483 little_endian_store_16(event, pos, big->bis_con_handles[bis_index]); 9484 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9485 } 9486 9487 static void hci_emit_cis_can_send_now(hci_con_handle_t cis_con_handle) { 9488 uint8_t event[4]; 9489 uint16_t pos = 0; 9490 event[pos++] = HCI_EVENT_CIS_CAN_SEND_NOW; 9491 event[pos++] = sizeof(event) - 2; 9492 little_endian_store_16(event, pos, cis_con_handle); 9493 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9494 } 9495 9496 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle){ 9497 btstack_linked_list_iterator_t it; 9498 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9499 while (btstack_linked_list_iterator_has_next(&it)){ 9500 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9501 if ( big->big_handle == big_handle ) { 9502 return big; 9503 } 9504 } 9505 return NULL; 9506 } 9507 9508 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle){ 9509 btstack_linked_list_iterator_t it; 9510 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 9511 while (btstack_linked_list_iterator_has_next(&it)){ 9512 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 9513 if ( big_sync->big_handle == big_handle ) { 9514 return big_sync; 9515 } 9516 } 9517 return NULL; 9518 } 9519 9520 void hci_set_num_iso_packets_to_queue(uint8_t num_packets){ 9521 hci_stack->iso_packets_to_queue = num_packets; 9522 } 9523 9524 static le_audio_cig_t * hci_cig_for_id(uint8_t cig_id){ 9525 btstack_linked_list_iterator_t it; 9526 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_cigs); 9527 while (btstack_linked_list_iterator_has_next(&it)){ 9528 le_audio_cig_t * cig = (le_audio_cig_t *) btstack_linked_list_iterator_next(&it); 9529 if ( cig->cig_id == cig_id ) { 9530 return cig; 9531 } 9532 } 9533 return NULL; 9534 } 9535 9536 static void hci_iso_notify_can_send_now(void){ 9537 9538 // BIG 9539 9540 btstack_linked_list_iterator_t it; 9541 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9542 while (btstack_linked_list_iterator_has_next(&it)){ 9543 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9544 // track number completed packet timestamps 9545 if (big->num_completed_timestamp_current_valid){ 9546 big->num_completed_timestamp_current_valid = false; 9547 if (big->num_completed_timestamp_previous_valid){ 9548 // detect delayed sending of all BIS: tolerate up to 50% delayed event handling 9549 uint32_t iso_interval_missed_threshold_ms = big->params->sdu_interval_us * 3 / 2000; 9550 int32_t num_completed_timestamp_delta_ms = btstack_time_delta(big->num_completed_timestamp_current_ms, 9551 big->num_completed_timestamp_previous_ms); 9552 if (num_completed_timestamp_delta_ms > iso_interval_missed_threshold_ms){ 9553 // to catch up, skip packet on all BIS 9554 uint8_t i; 9555 for (i=0;i<big->num_bis;i++){ 9556 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9557 if (iso_stream){ 9558 iso_stream->num_packets_to_skip++; 9559 } 9560 } 9561 } 9562 } 9563 big->num_completed_timestamp_previous_valid = true; 9564 big->num_completed_timestamp_previous_ms = big->num_completed_timestamp_current_ms; 9565 } 9566 9567 if (big->can_send_now_requested){ 9568 // check if no outgoing iso packets pending and no can send now have to be emitted 9569 uint8_t i; 9570 bool can_send = true; 9571 uint8_t num_iso_queued_minimum = 0; 9572 for (i=0;i<big->num_bis;i++){ 9573 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9574 if (iso_stream == NULL) continue; 9575 // handle case where individual ISO packet was sent too late: 9576 // for each additionally queued packet, a new one needs to get skipped 9577 if (i==0){ 9578 num_iso_queued_minimum = iso_stream->num_packets_sent; 9579 } else if (iso_stream->num_packets_sent > num_iso_queued_minimum){ 9580 uint8_t num_packets_to_skip = iso_stream->num_packets_sent - num_iso_queued_minimum; 9581 iso_stream->num_packets_to_skip += num_packets_to_skip; 9582 iso_stream->num_packets_sent -= num_packets_to_skip; 9583 } 9584 // check if we can send now 9585 if ((iso_stream->num_packets_sent >= hci_stack->iso_packets_to_queue) || (iso_stream->emit_ready_to_send)){ 9586 can_send = false; 9587 break; 9588 } 9589 } 9590 if (can_send){ 9591 // propagate can send now to individual streams 9592 big->can_send_now_requested = false; 9593 for (i=0;i<big->num_bis;i++){ 9594 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9595 iso_stream->emit_ready_to_send = true; 9596 } 9597 } 9598 } 9599 } 9600 9601 if (hci_stack->hci_packet_buffer_reserved) return; 9602 9603 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9604 while (btstack_linked_list_iterator_has_next(&it)){ 9605 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9606 // report bis ready 9607 uint8_t i; 9608 for (i=0;i<big->num_bis;i++){ 9609 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9610 if ((iso_stream != NULL) && iso_stream->emit_ready_to_send){ 9611 iso_stream->emit_ready_to_send = false; 9612 hci_emit_bis_can_send_now(big, i); 9613 break; 9614 } 9615 } 9616 } 9617 9618 // CIS 9619 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 9620 while (btstack_linked_list_iterator_has_next(&it)) { 9621 hci_iso_stream_t *iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 9622 if ((iso_stream->can_send_now_requested) && 9623 (iso_stream->num_packets_sent < hci_stack->iso_packets_to_queue)){ 9624 iso_stream->can_send_now_requested = false; 9625 hci_emit_cis_can_send_now(iso_stream->con_handle); 9626 } 9627 } 9628 } 9629 9630 uint8_t gap_big_create(le_audio_big_t * storage, le_audio_big_params_t * big_params){ 9631 if (hci_big_for_handle(big_params->big_handle) != NULL){ 9632 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9633 } 9634 if (big_params->num_bis == 0){ 9635 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9636 } 9637 if (big_params->num_bis > MAX_NR_BIS){ 9638 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9639 } 9640 9641 // reserve ISO Streams 9642 uint8_t i; 9643 uint8_t status = ERROR_CODE_SUCCESS; 9644 for (i=0;i<big_params->num_bis;i++){ 9645 status = hci_iso_stream_create(HCI_ISO_TYPE_BIS, HCI_CON_HANDLE_INVALID, big_params->big_handle, 9646 HCI_ISO_STREAM_STATE_REQUESTED); 9647 if (status != ERROR_CODE_SUCCESS) { 9648 break; 9649 } 9650 } 9651 9652 // free structs on error 9653 if (status != ERROR_CODE_SUCCESS){ 9654 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big_params->big_handle); 9655 return status; 9656 } 9657 9658 le_audio_big_t * big = storage; 9659 big->big_handle = big_params->big_handle; 9660 big->params = big_params; 9661 big->state = LE_AUDIO_BIG_STATE_CREATE; 9662 big->num_bis = big_params->num_bis; 9663 btstack_linked_list_add(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9664 9665 hci_run(); 9666 9667 return ERROR_CODE_SUCCESS; 9668 } 9669 9670 uint8_t gap_big_sync_create(le_audio_big_sync_t * storage, le_audio_big_sync_params_t * big_sync_params){ 9671 if (hci_big_sync_for_handle(big_sync_params->big_handle) != NULL){ 9672 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9673 } 9674 if (big_sync_params->num_bis == 0){ 9675 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9676 } 9677 if (big_sync_params->num_bis > MAX_NR_BIS){ 9678 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9679 } 9680 9681 le_audio_big_sync_t * big_sync = storage; 9682 big_sync->big_handle = big_sync_params->big_handle; 9683 big_sync->params = big_sync_params; 9684 big_sync->state = LE_AUDIO_BIG_STATE_CREATE; 9685 big_sync->num_bis = big_sync_params->num_bis; 9686 btstack_linked_list_add(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9687 9688 hci_run(); 9689 9690 return ERROR_CODE_SUCCESS; 9691 } 9692 9693 uint8_t gap_big_terminate(uint8_t big_handle){ 9694 le_audio_big_t * big = hci_big_for_handle(big_handle); 9695 if (big == NULL){ 9696 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9697 } 9698 switch (big->state){ 9699 case LE_AUDIO_BIG_STATE_CREATE: 9700 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9701 hci_emit_big_terminated(big); 9702 break; 9703 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9704 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9705 break; 9706 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9707 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9708 case LE_AUDIO_BIG_STATE_ACTIVE: 9709 big->state = LE_AUDIO_BIG_STATE_TERMINATE; 9710 hci_run(); 9711 break; 9712 default: 9713 return ERROR_CODE_COMMAND_DISALLOWED; 9714 } 9715 return ERROR_CODE_SUCCESS; 9716 } 9717 9718 uint8_t gap_big_sync_terminate(uint8_t big_handle){ 9719 le_audio_big_sync_t * big_sync = hci_big_sync_for_handle(big_handle); 9720 if (big_sync == NULL){ 9721 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9722 } 9723 switch (big_sync->state){ 9724 case LE_AUDIO_BIG_STATE_CREATE: 9725 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9726 hci_emit_big_sync_stopped(big_handle); 9727 break; 9728 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9729 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9730 break; 9731 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9732 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9733 case LE_AUDIO_BIG_STATE_ACTIVE: 9734 big_sync->state = LE_AUDIO_BIG_STATE_TERMINATE; 9735 hci_run(); 9736 break; 9737 default: 9738 return ERROR_CODE_COMMAND_DISALLOWED; 9739 } 9740 return ERROR_CODE_SUCCESS; 9741 } 9742 9743 uint8_t hci_request_bis_can_send_now_events(uint8_t big_handle){ 9744 le_audio_big_t * big = hci_big_for_handle(big_handle); 9745 if (big == NULL){ 9746 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9747 } 9748 if (big->state != LE_AUDIO_BIG_STATE_ACTIVE){ 9749 return ERROR_CODE_COMMAND_DISALLOWED; 9750 } 9751 big->can_send_now_requested = true; 9752 hci_iso_notify_can_send_now(); 9753 return ERROR_CODE_SUCCESS; 9754 } 9755 9756 uint8_t hci_request_cis_can_send_now_events(hci_con_handle_t cis_con_handle){ 9757 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_con_handle); 9758 if (iso_stream == NULL){ 9759 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9760 } 9761 if ((iso_stream->iso_type != HCI_ISO_TYPE_CIS) && (iso_stream->state != HCI_ISO_STREAM_STATE_ESTABLISHED)) { 9762 return ERROR_CODE_COMMAND_DISALLOWED; 9763 } 9764 iso_stream->can_send_now_requested = true; 9765 hci_iso_notify_can_send_now(); 9766 return ERROR_CODE_SUCCESS; 9767 } 9768 9769 uint8_t gap_cig_create(le_audio_cig_t * storage, le_audio_cig_params_t * cig_params){ 9770 if (hci_cig_for_id(cig_params->cig_id) != NULL){ 9771 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9772 } 9773 if (cig_params->num_cis == 0){ 9774 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9775 } 9776 if (cig_params->num_cis > MAX_NR_BIS){ 9777 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9778 } 9779 9780 // reserve ISO Streams 9781 uint8_t i; 9782 uint8_t status = ERROR_CODE_SUCCESS; 9783 for (i=0;i<cig_params->num_cis;i++){ 9784 status = hci_iso_stream_create(HCI_ISO_TYPE_CIS, HCI_CON_HANDLE_INVALID, cig_params->cig_id, 9785 HCI_ISO_STREAM_STATE_REQUESTED); 9786 if (status != ERROR_CODE_SUCCESS) { 9787 break; 9788 } 9789 } 9790 9791 // free structs on error 9792 if (status != ERROR_CODE_SUCCESS){ 9793 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_CIS, cig_params->cig_id); 9794 return status; 9795 } 9796 9797 le_audio_cig_t * cig = storage; 9798 cig->cig_id = cig_params->cig_id; 9799 cig->num_cis = cig_params->num_cis; 9800 cig->params = cig_params; 9801 cig->state = LE_AUDIO_CIG_STATE_CREATE; 9802 for (i=0;i<cig->num_cis;i++){ 9803 cig->cis_con_handles[i] = HCI_CON_HANDLE_INVALID; 9804 cig->acl_con_handles[i] = HCI_CON_HANDLE_INVALID; 9805 } 9806 btstack_linked_list_add(&hci_stack->le_audio_cigs, (btstack_linked_item_t *) cig); 9807 9808 hci_run(); 9809 9810 return ERROR_CODE_SUCCESS; 9811 } 9812 9813 uint8_t gap_cis_create(uint8_t cig_handle, hci_con_handle_t cis_con_handles [], hci_con_handle_t acl_con_handles []){ 9814 le_audio_cig_t * cig = hci_cig_for_id(cig_handle); 9815 if (cig == NULL){ 9816 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9817 } 9818 9819 if (cig->state != LE_AUDIO_CIG_STATE_W4_CIS_REQUEST){ 9820 return ERROR_CODE_COMMAND_DISALLOWED; 9821 } 9822 9823 // store ACL Connection Handles 9824 uint8_t i; 9825 for (i=0;i<cig->num_cis;i++){ 9826 // check that all con handles exit 9827 hci_con_handle_t cis_handle = cis_con_handles[i]; 9828 uint8_t j; 9829 bool found = false; 9830 for (j=0;j<cig->num_cis;j++){ 9831 if (cig->cis_con_handles[j] == cis_handle){ 9832 cig->acl_con_handles[j] = acl_con_handles[j]; 9833 found = true; 9834 break; 9835 } 9836 } 9837 if (!found){ 9838 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9839 } 9840 } 9841 9842 cig->state = LE_AUDIO_CIG_STATE_CREATE_CIS; 9843 hci_run(); 9844 9845 return ERROR_CODE_SUCCESS; 9846 } 9847 9848 static uint8_t hci_cis_accept_or_reject(hci_con_handle_t cis_con_handle, hci_iso_stream_state_t state){ 9849 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_con_handle); 9850 if (iso_stream != NULL){ 9851 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9852 } 9853 9854 uint8_t status = hci_iso_stream_create(HCI_ISO_TYPE_CIS, cis_con_handle, 9855 HCI_ISO_GROUP_ID_INVALID, state); 9856 if (status == ERROR_CODE_SUCCESS){ 9857 return status; 9858 } 9859 9860 hci_run(); 9861 return ERROR_CODE_SUCCESS; 9862 } 9863 9864 uint8_t gap_cis_accept(hci_con_handle_t cis_con_handle){ 9865 return hci_cis_accept_or_reject(cis_con_handle, HCI_ISO_STREAM_W2_ACCEPT); 9866 } 9867 9868 uint8_t gap_cis_reject(hci_con_handle_t cis_con_handle){ 9869 return hci_cis_accept_or_reject(cis_con_handle, HCI_ISO_STREAM_W2_REJECT); 9870 } 9871 9872 9873 #endif 9874 #endif /* ENABLE_BLE */ 9875 9876 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 9877 void hci_setup_test_connections_fuzz(void){ 9878 hci_connection_t * conn; 9879 9880 // default address: 66:55:44:33:00:01 9881 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 9882 9883 // setup Controller info 9884 hci_stack->num_cmd_packets = 255; 9885 hci_stack->acl_packets_total_num = 255; 9886 9887 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 9888 addr[5] = 0x01; 9889 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9890 conn->con_handle = addr[5]; 9891 conn->role = HCI_ROLE_SLAVE; 9892 conn->state = RECEIVED_CONNECTION_REQUEST; 9893 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9894 9895 // setup incoming Classic SCO connection with con handle 0x0002 9896 addr[5] = 0x02; 9897 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9898 conn->con_handle = addr[5]; 9899 conn->role = HCI_ROLE_SLAVE; 9900 conn->state = RECEIVED_CONNECTION_REQUEST; 9901 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9902 9903 // setup ready Classic ACL connection with con handle 0x0003 9904 addr[5] = 0x03; 9905 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9906 conn->con_handle = addr[5]; 9907 conn->role = HCI_ROLE_SLAVE; 9908 conn->state = OPEN; 9909 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9910 9911 // setup ready Classic SCO connection with con handle 0x0004 9912 addr[5] = 0x04; 9913 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9914 conn->con_handle = addr[5]; 9915 conn->role = HCI_ROLE_SLAVE; 9916 conn->state = OPEN; 9917 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9918 9919 // setup ready LE ACL connection with con handle 0x005 and public address 9920 addr[5] = 0x05; 9921 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 9922 conn->con_handle = addr[5]; 9923 conn->role = HCI_ROLE_SLAVE; 9924 conn->state = OPEN; 9925 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9926 conn->sm_connection.sm_connection_encrypted = 1; 9927 } 9928 9929 void hci_free_connections_fuzz(void){ 9930 btstack_linked_list_iterator_t it; 9931 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 9932 while (btstack_linked_list_iterator_has_next(&it)){ 9933 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 9934 btstack_linked_list_iterator_remove(&it); 9935 btstack_memory_hci_connection_free(con); 9936 } 9937 } 9938 void hci_simulate_working_fuzz(void){ 9939 hci_stack->le_scanning_param_update = false; 9940 hci_init_done(); 9941 hci_stack->num_cmd_packets = 255; 9942 } 9943 #endif 9944