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