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