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_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #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." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 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 HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 156 static void hci_emit_transport_packet_sent(void); 157 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 158 static void hci_emit_nr_connections_changed(void); 159 static void hci_emit_hci_open_failed(void); 160 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 161 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 162 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 163 static void hci_run(void); 164 static int hci_is_le_connection(hci_connection_t * connection); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 169 #endif 170 171 #ifdef ENABLE_BLE 172 #ifdef ENABLE_LE_CENTRAL 173 // called from test/ble_client/advertising_data_parser.c 174 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 175 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 176 static void hci_whitelist_free(void); 177 static hci_connection_t * gap_get_outgoing_connection(void); 178 #endif 179 #endif 180 181 // the STACK is here 182 #ifndef HAVE_MALLOC 183 static hci_stack_t hci_stack_static; 184 #endif 185 static hci_stack_t * hci_stack = NULL; 186 187 #ifdef ENABLE_CLASSIC 188 // default name 189 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 190 191 // test helper 192 static uint8_t disable_l2cap_timeouts = 0; 193 #endif 194 195 // reset connection state on create and on reconnect 196 // don't overwrite addr, con handle, role 197 static void hci_connection_init(hci_connection_t * conn){ 198 conn->authentication_flags = AUTH_FLAG_NONE; 199 conn->bonding_flags = 0; 200 conn->requested_security_level = LEVEL_0; 201 #ifdef ENABLE_CLASSIC 202 conn->request_role = HCI_ROLE_INVALID; 203 conn->sniff_subrating_max_latency = 0xffff; 204 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 205 conn->link_key_type = INVALID_LINK_KEY; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 #ifdef ENABLE_CLASSIC_PAIRING_OOB 222 conn->classic_oob_c_192 = NULL; 223 conn->classic_oob_r_192 = NULL; 224 conn->classic_oob_c_256 = NULL; 225 conn->classic_oob_r_256 = NULL; 226 #endif 227 } 228 229 /** 230 * create connection for given address 231 * 232 * @return connection OR NULL, if no memory left 233 */ 234 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 235 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 236 237 hci_connection_t * conn = btstack_memory_hci_connection_get(); 238 if (!conn) return NULL; 239 hci_connection_init(conn); 240 241 bd_addr_copy(conn->address, addr); 242 conn->address_type = addr_type; 243 conn->con_handle = HCI_CON_HANDLE_INVALID; 244 conn->role = HCI_ROLE_INVALID; 245 246 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 247 248 return conn; 249 } 250 251 252 /** 253 * get le connection parameter range 254 * 255 * @return le connection parameter range struct 256 */ 257 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 258 *range = hci_stack->le_connection_parameter_range; 259 } 260 261 /** 262 * set le connection parameter range 263 * 264 */ 265 266 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 267 hci_stack->le_connection_parameter_range = *range; 268 } 269 270 /** 271 * @brief Test if connection parameters are inside in existing rage 272 * @param conn_interval_min (unit: 1.25ms) 273 * @param conn_interval_max (unit: 1.25ms) 274 * @param conn_latency 275 * @param supervision_timeout (unit: 10ms) 276 * @return 1 if included 277 */ 278 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){ 279 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 280 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 281 282 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 283 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 284 285 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 286 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 287 288 return 1; 289 } 290 291 /** 292 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 293 * @note: default: 1 294 * @param max_peripheral_connections 295 */ 296 #ifdef ENABLE_LE_PERIPHERAL 297 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 298 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 299 } 300 #endif 301 302 /** 303 * get hci connections iterator 304 * 305 * @return hci connections iterator 306 */ 307 308 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 309 btstack_linked_list_iterator_init(it, &hci_stack->connections); 310 } 311 312 /** 313 * get connection for a given handle 314 * 315 * @return connection OR NULL, if not found 316 */ 317 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 318 btstack_linked_list_iterator_t it; 319 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 320 while (btstack_linked_list_iterator_has_next(&it)){ 321 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 322 if ( item->con_handle == con_handle ) { 323 return item; 324 } 325 } 326 return NULL; 327 } 328 329 /** 330 * get connection for given address 331 * 332 * @return connection OR NULL, if not found 333 */ 334 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 335 btstack_linked_list_iterator_t it; 336 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 337 while (btstack_linked_list_iterator_has_next(&it)){ 338 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 339 if (connection->address_type != addr_type) continue; 340 if (memcmp(addr, connection->address, 6) != 0) continue; 341 return connection; 342 } 343 return NULL; 344 } 345 346 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 347 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 348 } 349 350 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 351 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 352 } 353 354 #ifdef ENABLE_CLASSIC 355 356 #ifdef ENABLE_SCO_OVER_HCI 357 static int hci_number_sco_connections(void){ 358 int connections = 0; 359 btstack_linked_list_iterator_t it; 360 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 361 while (btstack_linked_list_iterator_has_next(&it)){ 362 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 363 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 364 connections++; 365 } 366 return connections; 367 } 368 #endif 369 370 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 371 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 372 #ifdef HAVE_EMBEDDED_TICK 373 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 374 // connections might be timed out 375 hci_emit_l2cap_check_timeout(connection); 376 } 377 #else 378 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 379 // connections might be timed out 380 hci_emit_l2cap_check_timeout(connection); 381 } 382 #endif 383 } 384 385 static void hci_connection_timestamp(hci_connection_t *connection){ 386 #ifdef HAVE_EMBEDDED_TICK 387 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 388 #else 389 connection->timestamp = btstack_run_loop_get_time_ms(); 390 #endif 391 } 392 393 /** 394 * add authentication flags and reset timer 395 * @note: assumes classic connection 396 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 397 */ 398 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 399 bd_addr_t addr; 400 reverse_bd_addr(bd_addr, addr); 401 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 402 if (conn) { 403 connectionSetAuthenticationFlags(conn, flags); 404 hci_connection_timestamp(conn); 405 } 406 } 407 408 static bool hci_pairing_active(hci_connection_t * hci_connection){ 409 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 410 } 411 412 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 413 if (hci_pairing_active(hci_connection)) return; 414 if (ssp){ 415 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 416 } else { 417 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 418 } 419 // if we are initiator, we have sent an HCI Authenticate Request 420 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 421 422 // if we are responder, use minimal service security level as required level 423 if (!initiator){ 424 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); 425 } 426 427 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 428 429 uint8_t event[12]; 430 event[0] = GAP_EVENT_PAIRING_STARTED; 431 event[1] = 10; 432 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 433 reverse_bd_addr(hci_connection->address, &event[4]); 434 event[10] = (uint8_t) ssp; 435 event[11] = (uint8_t) initiator; 436 hci_emit_event(event, sizeof(event), 1); 437 } 438 439 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 440 hci_connection->requested_security_level = LEVEL_0; 441 if (!hci_pairing_active(hci_connection)) return; 442 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 443 #ifdef ENABLE_CLASSIC_PAIRING_OOB 444 hci_connection->classic_oob_c_192 = NULL; 445 hci_connection->classic_oob_r_192 = NULL; 446 hci_connection->classic_oob_c_256 = NULL; 447 hci_connection->classic_oob_r_256 = NULL; 448 #endif 449 log_info("pairing complete, status %02x", status); 450 451 uint8_t event[11]; 452 event[0] = GAP_EVENT_PAIRING_COMPLETE; 453 event[1] = 9; 454 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 455 reverse_bd_addr(hci_connection->address, &event[4]); 456 event[10] = status; 457 hci_emit_event(event, sizeof(event), 1); 458 } 459 460 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 461 hci_connection_t * conn = hci_connection_for_handle(handle); 462 if (!conn) return false; 463 return hci_pairing_active(conn); 464 } 465 466 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 467 if (!hci_stack->link_key_db) return; 468 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 469 hci_stack->link_key_db->delete_link_key(addr); 470 } 471 472 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 473 if (!hci_stack->link_key_db) return; 474 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 475 hci_stack->link_key_db->put_link_key(addr, link_key, type); 476 } 477 478 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 479 if (!hci_stack->link_key_db) return false; 480 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 481 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 482 return result; 483 } 484 485 void gap_delete_all_link_keys(void){ 486 bd_addr_t addr; 487 link_key_t link_key; 488 link_key_type_t type; 489 btstack_link_key_iterator_t it; 490 int ok = gap_link_key_iterator_init(&it); 491 if (!ok) { 492 log_error("could not initialize iterator"); 493 return; 494 } 495 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 496 gap_drop_link_key_for_bd_addr(addr); 497 } 498 gap_link_key_iterator_done(&it); 499 } 500 501 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 502 if (!hci_stack->link_key_db) return 0; 503 if (!hci_stack->link_key_db->iterator_init) return 0; 504 return hci_stack->link_key_db->iterator_init(it); 505 } 506 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){ 507 if (!hci_stack->link_key_db) return 0; 508 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 509 } 510 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 511 if (!hci_stack->link_key_db) return; 512 hci_stack->link_key_db->iterator_done(it); 513 } 514 #endif 515 516 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 517 switch (address_type){ 518 case BD_ADDR_TYPE_LE_PUBLIC: 519 case BD_ADDR_TYPE_LE_RANDOM: 520 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 521 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 522 return true; 523 default: 524 return false; 525 } 526 } 527 528 static int hci_is_le_connection(hci_connection_t * connection){ 529 return hci_is_le_connection_type(connection->address_type); 530 } 531 532 /** 533 * count connections 534 */ 535 static int nr_hci_connections(void){ 536 int count = 0; 537 btstack_linked_item_t *it; 538 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 539 count++; 540 } 541 return count; 542 } 543 544 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 545 546 unsigned int num_packets_sent_classic = 0; 547 unsigned int num_packets_sent_le = 0; 548 549 btstack_linked_item_t *it; 550 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 551 hci_connection_t * connection = (hci_connection_t *) it; 552 if (hci_is_le_connection(connection)){ 553 num_packets_sent_le += connection->num_packets_sent; 554 } 555 if (connection->address_type == BD_ADDR_TYPE_ACL){ 556 num_packets_sent_classic += connection->num_packets_sent; 557 } 558 } 559 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 560 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 561 int free_slots_le = 0; 562 563 if (free_slots_classic < 0){ 564 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); 565 return 0; 566 } 567 568 if (hci_stack->le_acl_packets_total_num){ 569 // if we have LE slots, they are used 570 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 571 if (free_slots_le < 0){ 572 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); 573 return 0; 574 } 575 } else { 576 // otherwise, classic slots are used for LE, too 577 free_slots_classic -= num_packets_sent_le; 578 if (free_slots_classic < 0){ 579 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); 580 return 0; 581 } 582 } 583 584 switch (address_type){ 585 case BD_ADDR_TYPE_UNKNOWN: 586 log_error("hci_number_free_acl_slots: unknown address type"); 587 return 0; 588 589 case BD_ADDR_TYPE_ACL: 590 return (uint16_t) free_slots_classic; 591 592 default: 593 if (hci_stack->le_acl_packets_total_num > 0){ 594 return (uint16_t) free_slots_le; 595 } 596 return (uint16_t) free_slots_classic; 597 } 598 } 599 600 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 601 // get connection type 602 hci_connection_t * connection = hci_connection_for_handle(con_handle); 603 if (!connection){ 604 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 605 return 0; 606 } 607 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 608 } 609 610 #ifdef ENABLE_CLASSIC 611 static int hci_number_free_sco_slots(void){ 612 unsigned int num_sco_packets_sent = 0; 613 btstack_linked_item_t *it; 614 if (hci_stack->synchronous_flow_control_enabled){ 615 // explicit flow control 616 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 617 hci_connection_t * connection = (hci_connection_t *) it; 618 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 619 num_sco_packets_sent += connection->num_packets_sent; 620 } 621 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 622 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 623 return 0; 624 } 625 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 626 } else { 627 // implicit flow control -- TODO 628 int num_ready = 0; 629 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 630 hci_connection_t * connection = (hci_connection_t *) it; 631 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 632 if (connection->sco_tx_ready == 0) continue; 633 num_ready++; 634 } 635 return num_ready; 636 } 637 } 638 #endif 639 640 // only used to send HCI Host Number Completed Packets 641 static int hci_can_send_comand_packet_transport(void){ 642 if (hci_stack->hci_packet_buffer_reserved) return 0; 643 644 // check for async hci transport implementations 645 if (hci_stack->hci_transport->can_send_packet_now){ 646 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 647 return 0; 648 } 649 } 650 return 1; 651 } 652 653 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 654 bool hci_can_send_command_packet_now(void){ 655 if (hci_can_send_comand_packet_transport() == 0) return false; 656 return hci_stack->num_cmd_packets > 0u; 657 } 658 659 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 660 // check for async hci transport implementations 661 if (!hci_stack->hci_transport->can_send_packet_now) return true; 662 return hci_stack->hci_transport->can_send_packet_now(packet_type); 663 } 664 665 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 666 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 667 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 668 } 669 670 bool hci_can_send_acl_le_packet_now(void){ 671 if (hci_stack->hci_packet_buffer_reserved) return false; 672 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 673 } 674 675 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 676 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 677 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 678 } 679 680 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 681 if (hci_stack->hci_packet_buffer_reserved) return false; 682 return hci_can_send_prepared_acl_packet_now(con_handle); 683 } 684 685 #ifdef ENABLE_CLASSIC 686 bool hci_can_send_acl_classic_packet_now(void){ 687 if (hci_stack->hci_packet_buffer_reserved) return false; 688 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 689 } 690 691 bool hci_can_send_prepared_sco_packet_now(void){ 692 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 693 if (hci_have_usb_transport()){ 694 return hci_stack->sco_can_send_now; 695 } else { 696 return hci_number_free_sco_slots() > 0; 697 } 698 } 699 700 bool hci_can_send_sco_packet_now(void){ 701 if (hci_stack->hci_packet_buffer_reserved) return false; 702 return hci_can_send_prepared_sco_packet_now(); 703 } 704 705 void hci_request_sco_can_send_now_event(void){ 706 hci_stack->sco_waiting_for_can_send_now = 1; 707 hci_notify_if_sco_can_send_now(); 708 } 709 #endif 710 711 // used for internal checks in l2cap.c 712 bool hci_is_packet_buffer_reserved(void){ 713 return hci_stack->hci_packet_buffer_reserved; 714 } 715 716 // reserves outgoing packet buffer. 717 // @return 1 if successful 718 bool hci_reserve_packet_buffer(void){ 719 if (hci_stack->hci_packet_buffer_reserved) { 720 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 721 return false; 722 } 723 hci_stack->hci_packet_buffer_reserved = true; 724 return true; 725 } 726 727 void hci_release_packet_buffer(void){ 728 hci_stack->hci_packet_buffer_reserved = false; 729 } 730 731 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 732 static int hci_transport_synchronous(void){ 733 return hci_stack->hci_transport->can_send_packet_now == NULL; 734 } 735 736 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 737 738 // 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); 739 740 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 741 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 742 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 743 max_acl_data_packet_length = hci_stack->le_data_packets_length; 744 } 745 746 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 747 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 748 max_acl_data_packet_length = connection->le_max_tx_octets; 749 } 750 #endif 751 752 log_debug("hci_send_acl_packet_fragments entered"); 753 754 uint8_t status = ERROR_CODE_SUCCESS; 755 // multiple packets could be send on a synchronous HCI transport 756 while (true){ 757 758 log_debug("hci_send_acl_packet_fragments loop entered"); 759 760 // get current data 761 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 762 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 763 bool more_fragments = false; 764 765 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 766 if (current_acl_data_packet_length > max_acl_data_packet_length){ 767 more_fragments = true; 768 current_acl_data_packet_length = max_acl_data_packet_length; 769 } 770 771 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 772 if (acl_header_pos > 0u){ 773 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 774 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 775 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 776 } 777 778 // update header len 779 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 780 781 // count packet 782 connection->num_packets_sent++; 783 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 784 785 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 786 if (more_fragments){ 787 // update start of next fragment to send 788 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 789 } else { 790 // done 791 hci_stack->acl_fragmentation_pos = 0; 792 hci_stack->acl_fragmentation_total_size = 0; 793 } 794 795 // send packet 796 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 797 const int size = current_acl_data_packet_length + 4; 798 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 799 hci_stack->acl_fragmentation_tx_active = 1; 800 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 801 if (err != 0){ 802 // no error from HCI Transport expected 803 status = ERROR_CODE_HARDWARE_FAILURE; 804 } 805 806 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 807 808 // done yet? 809 if (!more_fragments) break; 810 811 // can send more? 812 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 813 } 814 815 log_debug("hci_send_acl_packet_fragments loop over"); 816 817 // release buffer now for synchronous transport 818 if (hci_transport_synchronous()){ 819 hci_stack->acl_fragmentation_tx_active = 0; 820 hci_release_packet_buffer(); 821 hci_emit_transport_packet_sent(); 822 } 823 824 return status; 825 } 826 827 // pre: caller has reserved the packet buffer 828 uint8_t hci_send_acl_packet_buffer(int size){ 829 btstack_assert(hci_stack->hci_packet_buffer_reserved); 830 831 uint8_t * packet = hci_stack->hci_packet_buffer; 832 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 833 834 // check for free places on Bluetooth module 835 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 836 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 837 hci_release_packet_buffer(); 838 hci_emit_transport_packet_sent(); 839 return BTSTACK_ACL_BUFFERS_FULL; 840 } 841 842 hci_connection_t *connection = hci_connection_for_handle( con_handle); 843 if (!connection) { 844 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 845 hci_release_packet_buffer(); 846 hci_emit_transport_packet_sent(); 847 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 848 } 849 850 #ifdef ENABLE_CLASSIC 851 hci_connection_timestamp(connection); 852 #endif 853 854 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 855 856 // setup data 857 hci_stack->acl_fragmentation_total_size = size; 858 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 859 860 return hci_send_acl_packet_fragments(connection); 861 } 862 863 #ifdef ENABLE_CLASSIC 864 // pre: caller has reserved the packet buffer 865 uint8_t hci_send_sco_packet_buffer(int size){ 866 btstack_assert(hci_stack->hci_packet_buffer_reserved); 867 868 uint8_t * packet = hci_stack->hci_packet_buffer; 869 870 // skip checks in loopback mode 871 if (!hci_stack->loopback_mode){ 872 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 873 874 // check for free places on Bluetooth module 875 if (!hci_can_send_prepared_sco_packet_now()) { 876 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 877 hci_release_packet_buffer(); 878 hci_emit_transport_packet_sent(); 879 return BTSTACK_ACL_BUFFERS_FULL; 880 } 881 882 // track send packet in connection struct 883 hci_connection_t *connection = hci_connection_for_handle( con_handle); 884 if (!connection) { 885 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 889 } 890 891 if (hci_have_usb_transport()){ 892 // token used 893 hci_stack->sco_can_send_now = false; 894 } else { 895 if (hci_stack->synchronous_flow_control_enabled){ 896 connection->num_packets_sent++; 897 } else { 898 connection->sco_tx_ready--; 899 } 900 } 901 } 902 903 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 904 905 #ifdef HAVE_SCO_TRANSPORT 906 hci_stack->sco_transport->send_packet(packet, size); 907 hci_release_packet_buffer(); 908 hci_emit_transport_packet_sent(); 909 910 return 0; 911 #else 912 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 913 if (hci_transport_synchronous()){ 914 hci_release_packet_buffer(); 915 hci_emit_transport_packet_sent(); 916 } 917 918 if (err != 0){ 919 return ERROR_CODE_HARDWARE_FAILURE; 920 } 921 return ERROR_CODE_SUCCESS; 922 #endif 923 } 924 #endif 925 926 static void acl_handler(uint8_t *packet, uint16_t size){ 927 928 // get info 929 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 930 hci_connection_t *conn = hci_connection_for_handle(con_handle); 931 uint8_t acl_flags = READ_ACL_FLAGS(packet); 932 uint16_t acl_length = READ_ACL_LENGTH(packet); 933 934 // ignore non-registered handle 935 if (!conn){ 936 log_error("acl_handler called with non-registered handle %u!" , con_handle); 937 return; 938 } 939 940 // assert packet is complete 941 if ((acl_length + 4u) != size){ 942 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 943 return; 944 } 945 946 #ifdef ENABLE_CLASSIC 947 // update idle timestamp 948 hci_connection_timestamp(conn); 949 #endif 950 951 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 952 hci_stack->host_completed_packets = 1; 953 conn->num_packets_completed++; 954 #endif 955 956 // handle different packet types 957 switch (acl_flags & 0x03u) { 958 959 case 0x01: // continuation fragment 960 961 // sanity checks 962 if (conn->acl_recombination_pos == 0u) { 963 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 964 return; 965 } 966 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 967 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 968 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 969 conn->acl_recombination_pos = 0; 970 return; 971 } 972 973 // append fragment payload (header already stored) 974 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 975 &packet[4], acl_length); 976 conn->acl_recombination_pos += acl_length; 977 978 // forward complete L2CAP packet if complete. 979 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 980 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 981 // reset recombination buffer 982 conn->acl_recombination_length = 0; 983 conn->acl_recombination_pos = 0; 984 } 985 break; 986 987 case 0x02: { // first fragment 988 989 // sanity check 990 if (conn->acl_recombination_pos) { 991 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 992 conn->acl_recombination_pos = 0; 993 } 994 995 // peek into L2CAP packet! 996 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 997 998 // compare fragment size to L2CAP packet size 999 if (acl_length >= (l2cap_length + 4u)){ 1000 // forward fragment as L2CAP packet 1001 hci_emit_acl_packet(packet, acl_length + 4u); 1002 } else { 1003 1004 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1005 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1006 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1007 return; 1008 } 1009 1010 // store first fragment and tweak acl length for complete package 1011 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1012 packet, acl_length + 4u); 1013 conn->acl_recombination_pos = acl_length + 4u; 1014 conn->acl_recombination_length = l2cap_length; 1015 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1016 } 1017 break; 1018 1019 } 1020 default: 1021 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1022 return; 1023 } 1024 1025 // execute main loop 1026 hci_run(); 1027 } 1028 1029 static void hci_connection_stop_timer(hci_connection_t * conn){ 1030 btstack_run_loop_remove_timer(&conn->timeout); 1031 #ifdef ENABLE_CLASSIC 1032 btstack_run_loop_remove_timer(&conn->timeout_sco); 1033 #endif 1034 } 1035 1036 static void hci_shutdown_connection(hci_connection_t *conn){ 1037 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1038 1039 #ifdef ENABLE_CLASSIC 1040 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1041 bd_addr_type_t addr_type = conn->address_type; 1042 #endif 1043 #ifdef HAVE_SCO_TRANSPORT 1044 hci_con_handle_t con_handle = conn->con_handle; 1045 #endif 1046 #endif 1047 1048 hci_connection_stop_timer(conn); 1049 1050 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1051 btstack_memory_hci_connection_free( conn ); 1052 1053 // now it's gone 1054 hci_emit_nr_connections_changed(); 1055 1056 #ifdef ENABLE_CLASSIC 1057 #ifdef ENABLE_SCO_OVER_HCI 1058 // update SCO 1059 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1060 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1061 } 1062 #endif 1063 #ifdef HAVE_SCO_TRANSPORT 1064 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1065 hci_stack->sco_transport->close(con_handle); 1066 } 1067 #endif 1068 #endif 1069 } 1070 1071 #ifdef ENABLE_CLASSIC 1072 1073 static const uint16_t packet_type_sizes[] = { 1074 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1075 HCI_ACL_DH1_SIZE, 0, 0, 0, 1076 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1077 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1078 }; 1079 static const uint8_t packet_type_feature_requirement_bit[] = { 1080 0, // 3 slot packets 1081 1, // 5 slot packets 1082 25, // EDR 2 mpbs 1083 26, // EDR 3 mbps 1084 39, // 3 slot EDR packts 1085 40, // 5 slot EDR packet 1086 }; 1087 static const uint16_t packet_type_feature_packet_mask[] = { 1088 0x0f00, // 3 slot packets 1089 0xf000, // 5 slot packets 1090 0x1102, // EDR 2 mpbs 1091 0x2204, // EDR 3 mbps 1092 0x0300, // 3 slot EDR packts 1093 0x3000, // 5 slot EDR packet 1094 }; 1095 1096 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1097 // enable packet types based on size 1098 uint16_t packet_types = 0; 1099 unsigned int i; 1100 for (i=0;i<16;i++){ 1101 if (packet_type_sizes[i] == 0) continue; 1102 if (packet_type_sizes[i] <= buffer_size){ 1103 packet_types |= 1 << i; 1104 } 1105 } 1106 // disable packet types due to missing local supported features 1107 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1108 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1109 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1110 if (feature_set) continue; 1111 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1112 packet_types &= ~packet_type_feature_packet_mask[i]; 1113 } 1114 // flip bits for "may not be used" 1115 packet_types ^= 0x3306; 1116 return packet_types; 1117 } 1118 1119 uint16_t hci_usable_acl_packet_types(void){ 1120 return hci_stack->packet_types; 1121 } 1122 #endif 1123 1124 uint8_t* hci_get_outgoing_packet_buffer(void){ 1125 // hci packet buffer is >= acl data packet length 1126 return hci_stack->hci_packet_buffer; 1127 } 1128 1129 uint16_t hci_max_acl_data_packet_length(void){ 1130 return hci_stack->acl_data_packet_length; 1131 } 1132 1133 #ifdef ENABLE_CLASSIC 1134 bool hci_extended_sco_link_supported(void){ 1135 // No. 31, byte 3, bit 7 1136 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1137 } 1138 #endif 1139 1140 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1141 // No. 54, byte 6, bit 6 1142 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1143 } 1144 1145 #ifdef ENABLE_CLASSIC 1146 static int gap_ssp_supported(void){ 1147 // No. 51, byte 6, bit 3 1148 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1149 } 1150 #endif 1151 1152 static int hci_classic_supported(void){ 1153 #ifdef ENABLE_CLASSIC 1154 // No. 37, byte 4, bit 5, = No BR/EDR Support 1155 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1156 #else 1157 return 0; 1158 #endif 1159 } 1160 1161 static int hci_le_supported(void){ 1162 #ifdef ENABLE_BLE 1163 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1164 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1165 #else 1166 return 0; 1167 #endif 1168 } 1169 1170 #ifdef ENABLE_BLE 1171 1172 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1173 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1174 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1175 } else { 1176 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1177 } 1178 } 1179 1180 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1181 *addr_type = hci_stack->le_own_addr_type; 1182 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1183 } 1184 1185 #ifdef ENABLE_LE_PERIPHERAL 1186 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1187 *addr_type = hci_stack->le_advertisements_own_addr_type; 1188 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1189 }; 1190 #endif 1191 1192 #ifdef ENABLE_LE_CENTRAL 1193 1194 /** 1195 * @brief Get own addr type and address used for LE connections (Central) 1196 */ 1197 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1198 *addr_type = hci_stack->le_connection_own_addr_type; 1199 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1200 } 1201 1202 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1203 1204 int offset = 3; 1205 int num_reports = packet[offset]; 1206 offset += 1; 1207 1208 int i; 1209 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1210 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1211 for (i=0; (i<num_reports) && (offset < size);i++){ 1212 // sanity checks on data_length: 1213 uint8_t data_length = packet[offset + 8]; 1214 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1215 if ((offset + 9u + data_length + 1u) > size) return; 1216 // setup event 1217 uint8_t event_size = 10u + data_length; 1218 int pos = 0; 1219 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1220 event[pos++] = event_size; 1221 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1222 offset += 8; 1223 pos += 8; 1224 event[pos++] = packet[offset + 1 + data_length]; // rssi 1225 event[pos++] = data_length; 1226 offset++; 1227 (void)memcpy(&event[pos], &packet[offset], data_length); 1228 pos += data_length; 1229 offset += data_length + 1u; // rssi 1230 hci_emit_event(event, pos, 1); 1231 } 1232 } 1233 #endif 1234 #endif 1235 1236 #ifdef ENABLE_BLE 1237 #ifdef ENABLE_LE_PERIPHERAL 1238 static void hci_update_advertisements_enabled_for_current_roles(void){ 1239 if (hci_stack->le_advertisements_enabled){ 1240 // get number of active le slave connections 1241 int num_slave_connections = 0; 1242 btstack_linked_list_iterator_t it; 1243 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1244 while (btstack_linked_list_iterator_has_next(&it)){ 1245 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1246 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1247 if (con->state != OPEN) continue; 1248 if (con->role != HCI_ROLE_SLAVE) continue; 1249 if (!hci_is_le_connection(con)) continue; 1250 num_slave_connections++; 1251 } 1252 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1253 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1254 } else { 1255 hci_stack->le_advertisements_enabled_for_current_roles = false; 1256 } 1257 } 1258 #endif 1259 #endif 1260 1261 #ifdef ENABLE_CLASSIC 1262 static void gap_run_set_local_name(void){ 1263 hci_reserve_packet_buffer(); 1264 uint8_t * packet = hci_stack->hci_packet_buffer; 1265 // construct HCI Command and send 1266 uint16_t opcode = hci_write_local_name.opcode; 1267 hci_stack->last_cmd_opcode = opcode; 1268 packet[0] = opcode & 0xff; 1269 packet[1] = opcode >> 8; 1270 packet[2] = DEVICE_NAME_LEN; 1271 memset(&packet[3], 0, DEVICE_NAME_LEN); 1272 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1273 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1274 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1275 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1276 // expand '00:00:00:00:00:00' in name with bd_addr 1277 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1278 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1279 } 1280 1281 static void gap_run_set_eir_data(void){ 1282 hci_reserve_packet_buffer(); 1283 uint8_t * packet = hci_stack->hci_packet_buffer; 1284 // construct HCI Command in-place and send 1285 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1286 hci_stack->last_cmd_opcode = opcode; 1287 uint16_t offset = 0; 1288 packet[offset++] = opcode & 0xff; 1289 packet[offset++] = opcode >> 8; 1290 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1291 packet[offset++] = 0; // FEC not required 1292 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1293 if (hci_stack->eir_data){ 1294 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1295 ad_context_t context; 1296 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1297 uint8_t data_type = ad_iterator_get_data_type(&context); 1298 uint8_t size = ad_iterator_get_data_len(&context); 1299 const uint8_t *data = ad_iterator_get_data(&context); 1300 // copy item 1301 packet[offset++] = size + 1; 1302 packet[offset++] = data_type; 1303 memcpy(&packet[offset], data, size); 1304 // update name item 1305 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1306 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1307 } 1308 offset += size; 1309 } 1310 } else { 1311 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1312 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1313 packet[offset++] = bytes_to_copy + 1; 1314 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1315 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1316 // expand '00:00:00:00:00:00' in name with bd_addr 1317 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1318 } 1319 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1320 } 1321 1322 static void hci_run_gap_tasks_classic(void){ 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1325 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1330 gap_run_set_local_name(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1335 gap_run_set_eir_data(); 1336 return; 1337 } 1338 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1339 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1340 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1341 return; 1342 } 1343 // write page scan activity 1344 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1345 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1346 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1347 return; 1348 } 1349 // write page scan type 1350 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1351 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1352 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1353 return; 1354 } 1355 // write page timeout 1356 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1357 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1358 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1359 return; 1360 } 1361 // send scan enable 1362 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1363 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1364 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1365 return; 1366 } 1367 // send write scan activity 1368 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1369 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1370 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1371 return; 1372 } 1373 } 1374 #endif 1375 1376 #ifndef HAVE_HOST_CONTROLLER_API 1377 1378 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1379 if (!hci_stack->config) return 0; 1380 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1381 // Limit baud rate for Broadcom chipsets to 3 mbps 1382 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1383 baud_rate = 3000000; 1384 } 1385 return baud_rate; 1386 } 1387 1388 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1389 UNUSED(ds); 1390 1391 switch (hci_stack->substate){ 1392 case HCI_INIT_W4_SEND_RESET: 1393 log_info("Resend HCI Reset"); 1394 hci_stack->substate = HCI_INIT_SEND_RESET; 1395 hci_stack->num_cmd_packets = 1; 1396 hci_run(); 1397 break; 1398 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1399 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1400 if (hci_stack->hci_transport->reset_link){ 1401 hci_stack->hci_transport->reset_link(); 1402 } 1403 1404 /* fall through */ 1405 1406 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1407 log_info("Resend HCI Reset - CSR Warm Boot"); 1408 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1409 hci_stack->num_cmd_packets = 1; 1410 hci_run(); 1411 break; 1412 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1413 if (hci_stack->hci_transport->set_baudrate){ 1414 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1415 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1416 hci_stack->hci_transport->set_baudrate(baud_rate); 1417 } 1418 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1419 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1420 if (hci_stack->hci_transport->reset_link){ 1421 log_info("Link Reset"); 1422 hci_stack->hci_transport->reset_link(); 1423 } 1424 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1425 hci_run(); 1426 } 1427 break; 1428 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1429 // otherwise continue 1430 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1431 hci_send_cmd(&hci_read_local_supported_commands); 1432 break; 1433 default: 1434 break; 1435 } 1436 } 1437 #endif 1438 1439 static void hci_initializing_next_state(void){ 1440 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1441 } 1442 1443 static void hci_init_done(void){ 1444 // done. tell the app 1445 log_info("hci_init_done -> HCI_STATE_WORKING"); 1446 hci_stack->state = HCI_STATE_WORKING; 1447 hci_emit_state(); 1448 } 1449 1450 // assumption: hci_can_send_command_packet_now() == true 1451 static void hci_initializing_run(void){ 1452 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1453 1454 if (!hci_can_send_command_packet_now()) return; 1455 1456 #ifndef HAVE_HOST_CONTROLLER_API 1457 bool need_baud_change = hci_stack->config 1458 && hci_stack->chipset 1459 && hci_stack->chipset->set_baudrate_command 1460 && hci_stack->hci_transport->set_baudrate 1461 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1462 #endif 1463 1464 switch (hci_stack->substate){ 1465 case HCI_INIT_SEND_RESET: 1466 hci_state_reset(); 1467 1468 #ifndef HAVE_HOST_CONTROLLER_API 1469 // prepare reset if command complete not received in 100ms 1470 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1471 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1472 btstack_run_loop_add_timer(&hci_stack->timeout); 1473 #endif 1474 // send command 1475 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1476 hci_send_cmd(&hci_reset); 1477 break; 1478 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1479 hci_send_cmd(&hci_read_local_version_information); 1480 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1481 break; 1482 1483 #ifndef HAVE_HOST_CONTROLLER_API 1484 case HCI_INIT_SEND_READ_LOCAL_NAME: 1485 hci_send_cmd(&hci_read_local_name); 1486 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1487 break; 1488 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1489 hci_state_reset(); 1490 // prepare reset if command complete not received in 100ms 1491 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1492 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1493 btstack_run_loop_add_timer(&hci_stack->timeout); 1494 // send command 1495 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1496 hci_send_cmd(&hci_reset); 1497 break; 1498 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1499 hci_state_reset(); 1500 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1501 hci_send_cmd(&hci_reset); 1502 break; 1503 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1504 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1505 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1506 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1507 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1508 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1509 break; 1510 } 1511 case HCI_INIT_SET_BD_ADDR: 1512 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1513 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1514 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1515 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1516 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1517 break; 1518 case HCI_INIT_SEND_BAUD_CHANGE: 1519 if (need_baud_change) { 1520 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1521 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1522 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1523 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1524 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1525 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1526 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1527 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1528 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1529 btstack_run_loop_add_timer(&hci_stack->timeout); 1530 } 1531 break; 1532 } 1533 1534 /* fall through */ 1535 1536 case HCI_INIT_CUSTOM_INIT: 1537 // Custom initialization 1538 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1539 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1540 bool send_cmd = false; 1541 switch (hci_stack->chipset_result){ 1542 case BTSTACK_CHIPSET_VALID_COMMAND: 1543 send_cmd = true; 1544 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1545 break; 1546 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1547 send_cmd = true; 1548 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1549 log_info("CSR Warm Boot"); 1550 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1551 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1552 btstack_run_loop_add_timer(&hci_stack->timeout); 1553 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1554 && hci_stack->config 1555 && hci_stack->chipset 1556 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1557 && hci_stack->hci_transport->set_baudrate 1558 && hci_transport_uart_get_main_baud_rate()){ 1559 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1560 } else { 1561 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1562 } 1563 break; 1564 default: 1565 break; 1566 } 1567 1568 if (send_cmd){ 1569 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1570 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1571 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1572 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1573 break; 1574 } 1575 log_info("Init script done"); 1576 1577 // Init script download on Broadcom chipsets causes: 1578 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1579 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1580 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1581 1582 // - baud rate to reset, restore UART baud rate if needed 1583 if (need_baud_change) { 1584 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1585 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1586 hci_stack->hci_transport->set_baudrate(baud_rate); 1587 } 1588 1589 uint16_t bcm_delay_ms = 300; 1590 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1591 // -> Work around: wait here. 1592 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1593 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1594 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1595 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1596 btstack_run_loop_add_timer(&hci_stack->timeout); 1597 break; 1598 } 1599 } 1600 #endif 1601 /* fall through */ 1602 1603 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1604 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1605 hci_send_cmd(&hci_read_local_supported_commands); 1606 break; 1607 case HCI_INIT_READ_BD_ADDR: 1608 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1609 hci_send_cmd(&hci_read_bd_addr); 1610 break; 1611 case HCI_INIT_READ_BUFFER_SIZE: 1612 // only read buffer size if supported 1613 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1614 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1615 hci_send_cmd(&hci_read_buffer_size); 1616 break; 1617 } 1618 1619 /* fall through */ 1620 1621 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1622 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1623 hci_send_cmd(&hci_read_local_supported_features); 1624 break; 1625 1626 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1627 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1628 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1629 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1630 break; 1631 case HCI_INIT_HOST_BUFFER_SIZE: 1632 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1633 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1634 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1635 break; 1636 #endif 1637 1638 case HCI_INIT_SET_EVENT_MASK: 1639 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1640 if (hci_le_supported()){ 1641 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1642 } else { 1643 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1644 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1645 } 1646 break; 1647 1648 #ifdef ENABLE_CLASSIC 1649 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1650 if (hci_classic_supported() && gap_ssp_supported()){ 1651 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1652 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1653 break; 1654 } 1655 1656 /* fall through */ 1657 1658 case HCI_INIT_WRITE_INQUIRY_MODE: 1659 if (hci_classic_supported()){ 1660 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1661 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1662 break; 1663 } 1664 1665 /* fall through */ 1666 1667 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1668 // skip write secure connections host support if not supported or disabled 1669 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1670 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1671 hci_stack->secure_connections_active = true; 1672 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1673 break; 1674 } 1675 1676 #ifdef ENABLE_SCO_OVER_HCI 1677 /* fall through */ 1678 1679 // only sent if ENABLE_SCO_OVER_HCI is defined 1680 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1681 // skip write synchronous flow control if not supported 1682 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1683 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1684 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1685 break; 1686 } 1687 /* fall through */ 1688 1689 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1690 // skip write default erroneous data reporting if not supported 1691 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1692 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1693 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1694 break; 1695 } 1696 #endif 1697 1698 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1699 /* fall through */ 1700 1701 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1702 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1703 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1704 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1705 #ifdef ENABLE_SCO_OVER_HCI 1706 log_info("BCM: Route SCO data via HCI transport"); 1707 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1708 #endif 1709 #ifdef ENABLE_SCO_OVER_PCM 1710 log_info("BCM: Route SCO data via PCM interface"); 1711 #ifdef ENABLE_BCM_PCM_WBS 1712 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1713 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1714 #else 1715 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1716 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1717 #endif 1718 #endif 1719 break; 1720 } 1721 #endif 1722 1723 #ifdef ENABLE_SCO_OVER_PCM 1724 /* fall through */ 1725 1726 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1727 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1728 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1729 log_info("BCM: Config PCM interface for I2S"); 1730 #ifdef ENABLE_BCM_PCM_WBS 1731 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1732 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1733 #else 1734 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1735 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1736 #endif 1737 break; 1738 } 1739 #endif 1740 #endif 1741 1742 #ifdef ENABLE_BLE 1743 /* fall through */ 1744 1745 // LE INIT 1746 case HCI_INIT_LE_READ_BUFFER_SIZE: 1747 if (hci_le_supported()){ 1748 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1749 hci_send_cmd(&hci_le_read_buffer_size); 1750 break; 1751 } 1752 1753 /* fall through */ 1754 1755 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1756 // skip write le host if not supported (e.g. on LE only EM9301) 1757 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1758 // LE Supported Host = 1, Simultaneous Host = 0 1759 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1760 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1761 break; 1762 } 1763 1764 /* fall through */ 1765 1766 case HCI_INIT_LE_SET_EVENT_MASK: 1767 if (hci_le_supported()){ 1768 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1769 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1770 break; 1771 } 1772 #endif 1773 1774 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1775 /* fall through */ 1776 1777 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1778 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1779 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1780 hci_send_cmd(&hci_le_read_maximum_data_length); 1781 break; 1782 } 1783 1784 /* fall through */ 1785 1786 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1787 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1788 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1789 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1790 break; 1791 } 1792 #endif 1793 1794 #ifdef ENABLE_LE_CENTRAL 1795 /* fall through */ 1796 1797 case HCI_INIT_READ_WHITE_LIST_SIZE: 1798 if (hci_le_supported()){ 1799 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1800 hci_send_cmd(&hci_le_read_white_list_size); 1801 break; 1802 } 1803 1804 /* fall through */ 1805 1806 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1807 if (hci_le_supported()){ 1808 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1809 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1810 break; 1811 } 1812 #endif 1813 1814 /* fall through */ 1815 1816 case HCI_INIT_DONE: 1817 hci_stack->substate = HCI_INIT_DONE; 1818 #ifdef ENABLE_CLASSIC 1819 // init sequence complete, check if GAP Tasks are completed 1820 if (hci_stack->gap_tasks != 0) { 1821 hci_run_gap_tasks_classic(); 1822 break; 1823 } 1824 #endif 1825 hci_init_done(); 1826 break; 1827 1828 default: 1829 return; 1830 } 1831 } 1832 1833 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1834 bool command_completed = false; 1835 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1836 uint16_t opcode = little_endian_read_16(packet,3); 1837 if (opcode == hci_stack->last_cmd_opcode){ 1838 command_completed = true; 1839 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1840 } else { 1841 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1842 } 1843 } 1844 1845 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1846 uint8_t status = packet[2]; 1847 uint16_t opcode = little_endian_read_16(packet,4); 1848 if (opcode == hci_stack->last_cmd_opcode){ 1849 if (status){ 1850 command_completed = true; 1851 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1852 } else { 1853 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1854 } 1855 } else { 1856 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1857 } 1858 } 1859 #ifndef HAVE_HOST_CONTROLLER_API 1860 // Vendor == CSR 1861 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1862 // TODO: track actual command 1863 command_completed = true; 1864 } 1865 1866 // Vendor == Toshiba 1867 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1868 // TODO: track actual command 1869 command_completed = true; 1870 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1871 hci_stack->num_cmd_packets = 1; 1872 } 1873 #endif 1874 1875 return command_completed; 1876 } 1877 1878 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1879 1880 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1881 1882 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1883 1884 #ifndef HAVE_HOST_CONTROLLER_API 1885 1886 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1887 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1888 // 1889 // HCI Reset 1890 // Timeout 100 ms 1891 // HCI Reset 1892 // Command Complete Reset 1893 // HCI Read Local Version Information 1894 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1895 // hang... 1896 // 1897 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1898 if (!command_completed 1899 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1900 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1901 1902 uint16_t opcode = little_endian_read_16(packet,3); 1903 if (opcode == hci_reset.opcode){ 1904 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1905 return; 1906 } 1907 } 1908 1909 // CSR & H5 1910 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1911 if (!command_completed 1912 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1913 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1914 1915 uint16_t opcode = little_endian_read_16(packet,3); 1916 if (opcode == hci_reset.opcode){ 1917 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1918 return; 1919 } 1920 } 1921 1922 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1923 // fix: Correct substate and behave as command below 1924 if (command_completed){ 1925 switch (hci_stack->substate){ 1926 case HCI_INIT_SEND_RESET: 1927 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1928 break; 1929 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1930 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1931 break; 1932 default: 1933 break; 1934 } 1935 } 1936 1937 #endif 1938 1939 if (!command_completed) return; 1940 1941 bool need_baud_change = false; 1942 bool need_addr_change = false; 1943 1944 #ifndef HAVE_HOST_CONTROLLER_API 1945 need_baud_change = hci_stack->config 1946 && hci_stack->chipset 1947 && hci_stack->chipset->set_baudrate_command 1948 && hci_stack->hci_transport->set_baudrate 1949 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1950 1951 need_addr_change = hci_stack->custom_bd_addr_set 1952 && hci_stack->chipset 1953 && hci_stack->chipset->set_bd_addr_command; 1954 #endif 1955 1956 switch(hci_stack->substate){ 1957 1958 #ifndef HAVE_HOST_CONTROLLER_API 1959 case HCI_INIT_SEND_RESET: 1960 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1961 // fix: just correct substate and behave as command below 1962 1963 /* fall through */ 1964 #endif 1965 1966 case HCI_INIT_W4_SEND_RESET: 1967 btstack_run_loop_remove_timer(&hci_stack->timeout); 1968 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1969 return; 1970 1971 #ifndef HAVE_HOST_CONTROLLER_API 1972 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1973 // for STLC2500D, baud rate change already happened. 1974 // for others, baud rate gets changed now 1975 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1976 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1977 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1978 hci_stack->hci_transport->set_baudrate(baud_rate); 1979 } 1980 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1981 return; 1982 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1983 btstack_run_loop_remove_timer(&hci_stack->timeout); 1984 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1985 return; 1986 case HCI_INIT_W4_CUSTOM_INIT: 1987 // repeat custom init 1988 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1989 return; 1990 #endif 1991 1992 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1993 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1994 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1995 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1996 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1997 return; 1998 } 1999 if (need_addr_change){ 2000 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2001 return; 2002 } 2003 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2004 return; 2005 #ifndef HAVE_HOST_CONTROLLER_API 2006 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2007 if (need_baud_change){ 2008 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2009 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2010 hci_stack->hci_transport->set_baudrate(baud_rate); 2011 } 2012 if (need_addr_change){ 2013 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2014 return; 2015 } 2016 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2017 return; 2018 case HCI_INIT_W4_SET_BD_ADDR: 2019 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2020 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2021 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2022 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2023 return; 2024 } 2025 // skipping st warm boot 2026 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2027 return; 2028 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2029 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2030 return; 2031 #endif 2032 2033 case HCI_INIT_DONE: 2034 // set state if we came here by fall through 2035 hci_stack->substate = HCI_INIT_DONE; 2036 return; 2037 2038 default: 2039 break; 2040 } 2041 hci_initializing_next_state(); 2042 } 2043 2044 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2045 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2046 bd_addr_t bd_address; 2047 (void)memcpy(&bd_address, conn->address, 6); 2048 2049 #ifdef ENABLE_CLASSIC 2050 // cache needed data 2051 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2052 #endif 2053 2054 // connection failed, remove entry 2055 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2056 btstack_memory_hci_connection_free( conn ); 2057 2058 #ifdef ENABLE_CLASSIC 2059 // notify client if dedicated bonding 2060 if (notify_dedicated_bonding_failed){ 2061 log_info("hci notify_dedicated_bonding_failed"); 2062 hci_emit_dedicated_bonding_result(bd_address, status); 2063 } 2064 2065 // if authentication error, also delete link key 2066 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2067 gap_drop_link_key_for_bd_addr(bd_address); 2068 } 2069 #else 2070 UNUSED(status); 2071 #endif 2072 } 2073 2074 #ifdef ENABLE_CLASSIC 2075 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2076 // SSP Controller 2077 if (features[6] & (1 << 3)){ 2078 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2079 } 2080 // eSCO 2081 if (features[3] & (1<<7)){ 2082 conn->remote_supported_features[0] |= 1; 2083 } 2084 // Extended features 2085 if (features[7] & (1<<7)){ 2086 conn->remote_supported_features[0] |= 2; 2087 } 2088 } 2089 2090 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2091 // SSP Host 2092 if (features[0] & (1 << 0)){ 2093 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2094 } 2095 // SC Host 2096 if (features[0] & (1 << 3)){ 2097 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2098 } 2099 } 2100 2101 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2102 // SC Controller 2103 if (features[1] & (1 << 0)){ 2104 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2105 } 2106 } 2107 2108 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2109 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2110 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2111 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2112 if (conn->bonding_flags & BONDING_DEDICATED){ 2113 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2114 } 2115 } 2116 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2117 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2118 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2119 } 2120 2121 #endif 2122 2123 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2124 // handle BT initialization 2125 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2126 hci_initializing_event_handler(packet, size); 2127 } 2128 2129 // help with BT sleep 2130 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2131 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2132 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2133 hci_initializing_next_state(); 2134 } 2135 } 2136 2137 #ifdef ENABLE_CLASSIC 2138 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2139 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2140 conn->encryption_key_size = encryption_key_size; 2141 2142 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2143 conn->requested_security_level = LEVEL_0; 2144 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2145 return; 2146 } 2147 2148 // Request remote features if not already done 2149 hci_trigger_remote_features_for_connection(conn); 2150 2151 // Request Authentication if not already done 2152 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2153 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2154 } 2155 #endif 2156 2157 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2158 UNUSED(size); 2159 2160 uint16_t manufacturer; 2161 #ifdef ENABLE_CLASSIC 2162 hci_con_handle_t handle; 2163 hci_connection_t * conn; 2164 uint8_t status; 2165 #endif 2166 // get num cmd packets - limit to 1 to reduce complexity 2167 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2168 2169 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2170 switch (opcode){ 2171 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2172 if (packet[5]) break; 2173 // terminate, name 248 chars 2174 packet[6+248] = 0; 2175 log_info("local name: %s", &packet[6]); 2176 break; 2177 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2178 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2179 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2180 uint16_t acl_len = little_endian_read_16(packet, 6); 2181 uint16_t sco_len = packet[8]; 2182 2183 // determine usable ACL/SCO payload size 2184 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2185 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2186 2187 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2188 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2189 2190 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2191 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2192 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2193 } 2194 break; 2195 case HCI_OPCODE_HCI_READ_RSSI: 2196 if (packet[5] == ERROR_CODE_SUCCESS){ 2197 uint8_t event[5]; 2198 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2199 event[1] = 3; 2200 (void)memcpy(&event[2], &packet[6], 3); 2201 hci_emit_event(event, sizeof(event), 1); 2202 } 2203 break; 2204 #ifdef ENABLE_BLE 2205 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2206 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2207 hci_stack->le_acl_packets_total_num = packet[8]; 2208 // determine usable ACL payload size 2209 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2210 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2211 } 2212 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2213 break; 2214 #endif 2215 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2216 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2217 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2218 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2219 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); 2220 break; 2221 #endif 2222 #ifdef ENABLE_LE_CENTRAL 2223 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2224 hci_stack->le_whitelist_capacity = packet[6]; 2225 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2226 break; 2227 #endif 2228 case HCI_OPCODE_HCI_READ_BD_ADDR: 2229 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2230 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)); 2231 #ifdef ENABLE_CLASSIC 2232 if (hci_stack->link_key_db){ 2233 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2234 } 2235 #endif 2236 break; 2237 #ifdef ENABLE_CLASSIC 2238 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2239 hci_emit_discoverable_enabled(hci_stack->discoverable); 2240 break; 2241 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2242 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2243 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2244 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2245 hci_emit_event(event, sizeof(event), 1); 2246 } 2247 break; 2248 #endif 2249 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2250 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2251 2252 #ifdef ENABLE_CLASSIC 2253 // determine usable ACL packet types based on host buffer size and supported features 2254 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2255 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2256 #endif 2257 // Classic/LE 2258 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2259 break; 2260 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2261 manufacturer = little_endian_read_16(packet, 10); 2262 // map Cypress to Broadcom 2263 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2264 log_info("Treat Cypress as Broadcom"); 2265 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2266 little_endian_store_16(packet, 10, manufacturer); 2267 } 2268 hci_stack->manufacturer = manufacturer; 2269 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2270 break; 2271 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2272 hci_stack->local_supported_commands[0] = 2273 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2274 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2275 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2276 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2277 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2278 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2279 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2280 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2281 hci_stack->local_supported_commands[1] = 2282 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2283 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2284 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2285 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2286 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2287 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2288 break; 2289 #ifdef ENABLE_CLASSIC 2290 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2291 if (packet[5]) return; 2292 hci_stack->synchronous_flow_control_enabled = 1; 2293 break; 2294 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2295 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2296 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2297 conn = hci_connection_for_handle(handle); 2298 if (conn != NULL) { 2299 uint8_t key_size = 0; 2300 if (status == 0){ 2301 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2302 log_info("Handle %04x key Size: %u", handle, key_size); 2303 } else { 2304 key_size = 1; 2305 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2306 } 2307 hci_handle_read_encryption_key_size_complete(conn, key_size); 2308 } 2309 break; 2310 // assert pairing complete event is emitted. 2311 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2312 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2313 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2314 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2315 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2316 // lookup connection by gap pairing addr 2317 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2318 if (conn == NULL) break; 2319 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2320 break; 2321 2322 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2323 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2324 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2325 uint8_t event[67]; 2326 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2327 event[1] = 65; 2328 (void)memset(&event[2], 0, 65); 2329 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2330 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2331 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2332 event[2] = 3; 2333 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2334 } else { 2335 event[2] = 1; 2336 } 2337 } 2338 hci_emit_event(event, sizeof(event), 0); 2339 break; 2340 } 2341 2342 // note: only needed if user does not provide OOB data 2343 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2344 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2345 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2346 if (conn == NULL) break; 2347 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2348 break; 2349 #endif 2350 #endif 2351 default: 2352 break; 2353 } 2354 } 2355 2356 #ifdef ENABLE_BLE 2357 static void event_handle_le_connection_complete(const uint8_t * packet){ 2358 bd_addr_t addr; 2359 bd_addr_type_t addr_type; 2360 hci_connection_t * conn; 2361 2362 // Connection management 2363 reverse_bd_addr(&packet[8], addr); 2364 addr_type = (bd_addr_type_t)packet[7]; 2365 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2366 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2367 2368 #ifdef ENABLE_LE_CENTRAL 2369 // handle error: error is reported only to the initiator -> outgoing connection 2370 if (packet[3]){ 2371 2372 // handle cancelled outgoing connection 2373 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2374 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2375 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2376 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2377 // reset state 2378 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2379 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2380 // get outgoing connection conn struct for direct connect 2381 conn = gap_get_outgoing_connection(); 2382 } 2383 2384 // outgoing le connection establishment is done 2385 if (conn){ 2386 // remove entry 2387 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2388 btstack_memory_hci_connection_free( conn ); 2389 } 2390 return; 2391 } 2392 #endif 2393 2394 // on success, both hosts receive connection complete event 2395 if (packet[6] == HCI_ROLE_MASTER){ 2396 #ifdef ENABLE_LE_CENTRAL 2397 // if we're master on an le connection, it was an outgoing connection and we're done with it 2398 // note: no hci_connection_t object exists yet for connect with whitelist 2399 if (hci_is_le_connection_type(addr_type)){ 2400 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2401 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2402 } 2403 #endif 2404 } else { 2405 #ifdef ENABLE_LE_PERIPHERAL 2406 // if we're slave, it was an incoming connection, advertisements have stopped 2407 hci_stack->le_advertisements_active = false; 2408 #endif 2409 } 2410 2411 // LE connections are auto-accepted, so just create a connection if there isn't one already 2412 if (!conn){ 2413 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2414 } 2415 2416 // no memory, sorry. 2417 if (!conn){ 2418 return; 2419 } 2420 2421 conn->state = OPEN; 2422 conn->role = packet[6]; 2423 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2424 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2425 2426 #ifdef ENABLE_LE_PERIPHERAL 2427 if (packet[6] == HCI_ROLE_SLAVE){ 2428 hci_update_advertisements_enabled_for_current_roles(); 2429 } 2430 #endif 2431 2432 // init unenhanced att bearer mtu 2433 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2434 conn->att_connection.mtu_exchanged = false; 2435 2436 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2437 2438 // restart timer 2439 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2440 // btstack_run_loop_add_timer(&conn->timeout); 2441 2442 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2443 2444 hci_emit_nr_connections_changed(); 2445 } 2446 #endif 2447 2448 #ifdef ENABLE_CLASSIC 2449 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){ 2450 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2451 // LEVEL_4 is tested by l2cap 2452 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2453 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2454 if (level >= LEVEL_3){ 2455 // MITM not possible without keyboard or display 2456 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2457 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2458 2459 // MITM possible if one side has keyboard and the other has keyboard or display 2460 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2461 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2462 2463 // MITM not possible if one side has only display and other side has no keyboard 2464 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2465 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2466 } 2467 // LEVEL 2 requires SSP, which is a given 2468 return true; 2469 } 2470 2471 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2472 uint16_t i; 2473 for (i=0; i < size ; i++){ 2474 if (data[i] != 0) { 2475 return false; 2476 } 2477 } 2478 return true; 2479 } 2480 2481 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2482 // get requested security level 2483 gap_security_level_t requested_security_level = conn->requested_security_level; 2484 if (hci_stack->gap_secure_connections_only_mode){ 2485 requested_security_level = LEVEL_4; 2486 } 2487 2488 // assess security: LEVEL 4 requires SC 2489 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2490 if ((requested_security_level == LEVEL_4) && 2491 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2492 !hci_remote_sc_enabled(conn)){ 2493 log_info("Level 4 required, but SC not supported -> abort"); 2494 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2495 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2496 return; 2497 } 2498 2499 // assess security based on io capabilities 2500 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2501 // responder: fully validate io caps of both sides as well as OOB data 2502 bool security_possible = false; 2503 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2504 2505 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2506 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2507 // so we merge the OOB data availability 2508 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2509 if (conn->classic_oob_c_192 != NULL){ 2510 have_oob_data |= 1; 2511 } 2512 if (conn->classic_oob_c_256 != NULL){ 2513 have_oob_data |= 2; 2514 } 2515 // for up to Level 3, either P-192 as well as P-256 will do 2516 // 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 2517 // if remote does not SC, we should not receive P-256 data either 2518 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2519 security_possible = true; 2520 } 2521 // for Level 4, P-256 is needed 2522 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2523 security_possible = true; 2524 } 2525 #endif 2526 2527 if (security_possible == false){ 2528 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2529 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2530 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2531 return; 2532 } 2533 } else { 2534 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2535 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2536 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2537 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2538 log_info("Level 3+ required, but no input/output -> abort"); 2539 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2540 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2541 return; 2542 } 2543 #endif 2544 #endif 2545 } 2546 2547 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2548 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2549 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2550 } else { 2551 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2552 } 2553 #endif 2554 } 2555 2556 #endif 2557 2558 static void event_handler(uint8_t *packet, uint16_t size){ 2559 2560 uint16_t event_length = packet[1]; 2561 2562 // assert packet is complete 2563 if (size != (event_length + 2u)){ 2564 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2565 return; 2566 } 2567 2568 bd_addr_type_t addr_type; 2569 hci_con_handle_t handle; 2570 hci_connection_t * conn; 2571 int i; 2572 int create_connection_cmd; 2573 2574 #ifdef ENABLE_CLASSIC 2575 hci_link_type_t link_type; 2576 bd_addr_t addr; 2577 #endif 2578 2579 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2580 2581 switch (hci_event_packet_get_type(packet)) { 2582 2583 case HCI_EVENT_COMMAND_COMPLETE: 2584 handle_command_complete_event(packet, size); 2585 break; 2586 2587 case HCI_EVENT_COMMAND_STATUS: 2588 // get num cmd packets - limit to 1 to reduce complexity 2589 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2590 2591 // check command status to detected failed outgoing connections 2592 create_connection_cmd = 0; 2593 #ifdef ENABLE_CLASSIC 2594 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2595 create_connection_cmd = 1; 2596 } 2597 #endif 2598 #ifdef ENABLE_LE_CENTRAL 2599 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2600 create_connection_cmd = 1; 2601 } 2602 #endif 2603 if (create_connection_cmd) { 2604 uint8_t status = hci_event_command_status_get_status(packet); 2605 addr_type = hci_stack->outgoing_addr_type; 2606 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2607 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2608 2609 // reset outgoing address info 2610 memset(hci_stack->outgoing_addr, 0, 6); 2611 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2612 2613 // on error 2614 if (status != ERROR_CODE_SUCCESS){ 2615 #ifdef ENABLE_LE_CENTRAL 2616 if (hci_is_le_connection_type(addr_type)){ 2617 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2618 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2619 } 2620 #endif 2621 // error => outgoing connection failed 2622 if (conn != NULL){ 2623 hci_handle_connection_failed(conn, status); 2624 } 2625 } 2626 } 2627 2628 #ifdef ENABLE_CLASSIC 2629 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2630 uint8_t status = hci_event_command_status_get_status(packet); 2631 log_info("command status (inquiry), status %x", status); 2632 if (status == ERROR_CODE_SUCCESS) { 2633 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2634 } else { 2635 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2636 } 2637 } 2638 #endif 2639 break; 2640 2641 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2642 if (size < 3) return; 2643 uint16_t num_handles = packet[2]; 2644 if (size != (3u + num_handles * 4u)) return; 2645 uint16_t offset = 3; 2646 for (i=0; i<num_handles;i++){ 2647 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2648 offset += 2u; 2649 uint16_t num_packets = little_endian_read_16(packet, offset); 2650 offset += 2u; 2651 2652 conn = hci_connection_for_handle(handle); 2653 if (!conn){ 2654 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2655 continue; 2656 } 2657 2658 if (conn->num_packets_sent >= num_packets){ 2659 conn->num_packets_sent -= num_packets; 2660 } else { 2661 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2662 conn->num_packets_sent = 0; 2663 } 2664 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2665 2666 #ifdef ENABLE_CLASSIC 2667 // For SCO, we do the can_send_now_check here 2668 hci_notify_if_sco_can_send_now(); 2669 #endif 2670 } 2671 break; 2672 } 2673 2674 #ifdef ENABLE_CLASSIC 2675 case HCI_EVENT_INQUIRY_COMPLETE: 2676 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2677 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2678 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2679 hci_emit_event(event, sizeof(event), 1); 2680 } 2681 break; 2682 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2683 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2684 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2685 } 2686 break; 2687 case HCI_EVENT_CONNECTION_REQUEST: 2688 reverse_bd_addr(&packet[2], addr); 2689 link_type = (hci_link_type_t) packet[11]; 2690 2691 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2692 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2693 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2694 bd_addr_copy(hci_stack->decline_addr, addr); 2695 break; 2696 } 2697 2698 if (hci_stack->gap_classic_accept_callback != NULL){ 2699 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2700 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2701 bd_addr_copy(hci_stack->decline_addr, addr); 2702 break; 2703 } 2704 } 2705 2706 // TODO: eval COD 8-10 2707 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2708 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2709 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2710 if (!conn) { 2711 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2712 } 2713 if (!conn) { 2714 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2715 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2716 bd_addr_copy(hci_stack->decline_addr, addr); 2717 break; 2718 } 2719 conn->role = HCI_ROLE_SLAVE; 2720 conn->state = RECEIVED_CONNECTION_REQUEST; 2721 // store info about eSCO 2722 if (link_type == HCI_LINK_TYPE_ESCO){ 2723 conn->remote_supported_features[0] |= 1; 2724 } 2725 hci_run(); 2726 break; 2727 2728 case HCI_EVENT_CONNECTION_COMPLETE: 2729 // Connection management 2730 reverse_bd_addr(&packet[5], addr); 2731 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2732 addr_type = BD_ADDR_TYPE_ACL; 2733 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2734 if (conn) { 2735 if (!packet[2]){ 2736 conn->state = OPEN; 2737 conn->con_handle = little_endian_read_16(packet, 3); 2738 2739 // queue set supervision timeout if we're master 2740 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2741 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2742 } 2743 2744 // restart timer 2745 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2746 btstack_run_loop_add_timer(&conn->timeout); 2747 2748 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2749 2750 hci_emit_nr_connections_changed(); 2751 } else { 2752 // connection failed 2753 hci_handle_connection_failed(conn, packet[2]); 2754 } 2755 } 2756 break; 2757 2758 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2759 reverse_bd_addr(&packet[5], addr); 2760 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2761 if (packet[2]){ 2762 // connection failed 2763 break; 2764 } 2765 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2766 if (!conn) { 2767 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2768 } 2769 if (!conn) { 2770 break; 2771 } 2772 conn->state = OPEN; 2773 conn->con_handle = little_endian_read_16(packet, 3); 2774 2775 #ifdef ENABLE_SCO_OVER_HCI 2776 // update SCO 2777 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2778 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2779 } 2780 // trigger can send now 2781 if (hci_have_usb_transport()){ 2782 hci_stack->sco_can_send_now = true; 2783 } 2784 #endif 2785 #ifdef HAVE_SCO_TRANSPORT 2786 // configure sco transport 2787 if (hci_stack->sco_transport != NULL){ 2788 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2789 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2790 } 2791 #endif 2792 break; 2793 2794 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2795 handle = little_endian_read_16(packet, 3); 2796 conn = hci_connection_for_handle(handle); 2797 if (!conn) break; 2798 if (!packet[2]){ 2799 const uint8_t * features = &packet[5]; 2800 hci_handle_remote_features_page_0(conn, features); 2801 2802 // read extended features if possible 2803 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2804 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2805 break; 2806 } 2807 } 2808 hci_handle_remote_features_received(conn); 2809 break; 2810 2811 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2812 handle = little_endian_read_16(packet, 3); 2813 conn = hci_connection_for_handle(handle); 2814 if (!conn) break; 2815 // status = ok, page = 1 2816 if (!packet[2]) { 2817 uint8_t page_number = packet[5]; 2818 uint8_t maximum_page_number = packet[6]; 2819 const uint8_t * features = &packet[7]; 2820 bool done = false; 2821 switch (page_number){ 2822 case 1: 2823 hci_handle_remote_features_page_1(conn, features); 2824 if (maximum_page_number >= 2){ 2825 // get Secure Connections (Controller) from Page 2 if available 2826 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2827 } else { 2828 // otherwise, assume SC (Controller) == SC (Host) 2829 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2830 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2831 } 2832 done = true; 2833 } 2834 break; 2835 case 2: 2836 hci_handle_remote_features_page_2(conn, features); 2837 done = true; 2838 break; 2839 default: 2840 break; 2841 } 2842 if (!done) break; 2843 } 2844 hci_handle_remote_features_received(conn); 2845 break; 2846 2847 case HCI_EVENT_LINK_KEY_REQUEST: 2848 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2849 hci_event_link_key_request_get_bd_addr(packet, addr); 2850 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2851 if (!conn) break; 2852 2853 // lookup link key in db if not cached 2854 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2855 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2856 } 2857 2858 // response sent by hci_run() 2859 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2860 #endif 2861 break; 2862 2863 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2864 hci_event_link_key_request_get_bd_addr(packet, addr); 2865 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2866 if (!conn) break; 2867 2868 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2869 2870 // CVE-2020-26555: ignore NULL link key 2871 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2872 if (btstack_is_null(&packet[8], 16)) break; 2873 2874 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2875 // Change Connection Encryption keeps link key type 2876 if (link_key_type != CHANGED_COMBINATION_KEY){ 2877 conn->link_key_type = link_key_type; 2878 } 2879 2880 // cache link key. link keys stored in little-endian format for legacy reasons 2881 memcpy(&conn->link_key, &packet[8], 16); 2882 2883 // only store link key: 2884 // - if bondable enabled 2885 if (hci_stack->bondable == false) break; 2886 // - if security level sufficient 2887 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2888 // - for SSP, also check if remote side requested bonding as well 2889 if (conn->link_key_type != COMBINATION_KEY){ 2890 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2891 if (!remote_bonding){ 2892 break; 2893 } 2894 } 2895 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2896 break; 2897 } 2898 2899 case HCI_EVENT_PIN_CODE_REQUEST: 2900 hci_event_pin_code_request_get_bd_addr(packet, addr); 2901 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2902 if (!conn) break; 2903 2904 hci_pairing_started(conn, false); 2905 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2906 if (!hci_stack->bondable ){ 2907 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2908 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2909 hci_run(); 2910 return; 2911 } 2912 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2913 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2914 log_info("Level 4 required, but SC not supported -> abort"); 2915 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2916 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2917 hci_run(); 2918 return; 2919 } 2920 break; 2921 2922 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2923 hci_event_io_capability_response_get_bd_addr(packet, addr); 2924 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2925 if (!conn) break; 2926 2927 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2928 hci_pairing_started(conn, true); 2929 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2930 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2931 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2932 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2933 #endif 2934 break; 2935 2936 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2937 hci_event_io_capability_response_get_bd_addr(packet, addr); 2938 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2939 if (!conn) break; 2940 2941 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2942 hci_connection_timestamp(conn); 2943 hci_pairing_started(conn, true); 2944 break; 2945 2946 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2947 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2948 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2949 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2950 if (!conn) break; 2951 2952 hci_connection_timestamp(conn); 2953 2954 hci_pairing_started(conn, true); 2955 2956 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2957 break; 2958 #endif 2959 2960 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2961 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2962 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2963 if (!conn) break; 2964 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2965 if (hci_stack->ssp_auto_accept){ 2966 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2967 }; 2968 } else { 2969 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2970 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2971 // don't forward event to app 2972 hci_run(); 2973 return; 2974 } 2975 break; 2976 2977 case HCI_EVENT_USER_PASSKEY_REQUEST: 2978 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2979 if (hci_stack->ssp_auto_accept){ 2980 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2981 }; 2982 break; 2983 2984 case HCI_EVENT_MODE_CHANGE: 2985 handle = hci_event_mode_change_get_handle(packet); 2986 conn = hci_connection_for_handle(handle); 2987 if (!conn) break; 2988 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2989 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2990 break; 2991 #endif 2992 2993 case HCI_EVENT_ENCRYPTION_CHANGE: 2994 handle = hci_event_encryption_change_get_connection_handle(packet); 2995 conn = hci_connection_for_handle(handle); 2996 if (!conn) break; 2997 if (hci_event_encryption_change_get_status(packet) == 0u) { 2998 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2999 if (encryption_enabled){ 3000 if (hci_is_le_connection(conn)){ 3001 // For LE, we accept connection as encrypted 3002 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3003 } 3004 #ifdef ENABLE_CLASSIC 3005 else { 3006 3007 // dedicated bonding: send result and disconnect 3008 if (conn->bonding_flags & BONDING_DEDICATED){ 3009 conn->bonding_flags &= ~BONDING_DEDICATED; 3010 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3011 conn->bonding_status = packet[2]; 3012 break; 3013 } 3014 3015 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3016 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3017 bool connected_uses_aes_ccm = encryption_enabled == 2; 3018 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3019 log_info("SC during pairing, but only E0 now -> abort"); 3020 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3021 break; 3022 } 3023 3024 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3025 if (connected_uses_aes_ccm){ 3026 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3027 } 3028 3029 #ifdef ENABLE_TESTING_SUPPORT 3030 // work around for issue with PTS dongle 3031 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3032 #endif 3033 3034 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3035 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3036 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3037 } else { 3038 // if not, pretend everything is perfect 3039 hci_handle_read_encryption_key_size_complete(conn, 16); 3040 } 3041 } 3042 #endif 3043 } else { 3044 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3045 } 3046 } 3047 3048 break; 3049 3050 #ifdef ENABLE_CLASSIC 3051 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3052 handle = hci_event_authentication_complete_get_connection_handle(packet); 3053 conn = hci_connection_for_handle(handle); 3054 if (!conn) break; 3055 3056 // clear authentication active flag 3057 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3058 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3059 3060 // authenticated only if auth status == 0 3061 if (hci_event_authentication_complete_get_status(packet) == 0){ 3062 // authenticated 3063 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3064 3065 // If not already encrypted, start encryption 3066 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3067 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3068 break; 3069 } 3070 } 3071 3072 // emit updated security level 3073 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3074 break; 3075 3076 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3077 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3078 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3079 if (!conn) break; 3080 3081 // treat successfully paired connection as authenticated 3082 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3083 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3084 } 3085 3086 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3087 break; 3088 #endif 3089 3090 // HCI_EVENT_DISCONNECTION_COMPLETE 3091 // has been split, to first notify stack before shutting connection down 3092 // see end of function, too. 3093 case HCI_EVENT_DISCONNECTION_COMPLETE: 3094 if (packet[2]) break; // status != 0 3095 handle = little_endian_read_16(packet, 3); 3096 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3097 if (hci_stack->acl_fragmentation_total_size > 0u) { 3098 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3099 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3100 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3101 hci_stack->acl_fragmentation_total_size = 0; 3102 hci_stack->acl_fragmentation_pos = 0; 3103 if (release_buffer){ 3104 hci_release_packet_buffer(); 3105 } 3106 } 3107 } 3108 3109 conn = hci_connection_for_handle(handle); 3110 if (!conn) break; 3111 #ifdef ENABLE_CLASSIC 3112 // pairing failed if it was ongoing 3113 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3114 #endif 3115 3116 // emit dedicatd bonding event 3117 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3118 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3119 } 3120 3121 // mark connection for shutdown, stop timers, reset state 3122 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3123 hci_connection_stop_timer(conn); 3124 hci_connection_init(conn); 3125 3126 #ifdef ENABLE_BLE 3127 #ifdef ENABLE_LE_PERIPHERAL 3128 // re-enable advertisements for le connections if active 3129 if (hci_is_le_connection(conn)){ 3130 hci_update_advertisements_enabled_for_current_roles(); 3131 } 3132 #endif 3133 #endif 3134 break; 3135 3136 case HCI_EVENT_HARDWARE_ERROR: 3137 log_error("Hardware Error: 0x%02x", packet[2]); 3138 if (hci_stack->hardware_error_callback){ 3139 (*hci_stack->hardware_error_callback)(packet[2]); 3140 } else { 3141 // if no special requests, just reboot stack 3142 hci_power_control_off(); 3143 hci_power_control_on(); 3144 } 3145 break; 3146 3147 #ifdef ENABLE_CLASSIC 3148 case HCI_EVENT_ROLE_CHANGE: 3149 if (packet[2]) break; // status != 0 3150 reverse_bd_addr(&packet[3], addr); 3151 addr_type = BD_ADDR_TYPE_ACL; 3152 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3153 if (!conn) break; 3154 conn->role = packet[9]; 3155 break; 3156 #endif 3157 3158 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3159 // release packet buffer only for asynchronous transport and if there are not further fragements 3160 if (hci_transport_synchronous()) { 3161 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3162 return; // instead of break: to avoid re-entering hci_run() 3163 } 3164 hci_stack->acl_fragmentation_tx_active = 0; 3165 if (hci_stack->acl_fragmentation_total_size) break; 3166 hci_release_packet_buffer(); 3167 3168 // L2CAP receives this event via the hci_emit_event below 3169 3170 #ifdef ENABLE_CLASSIC 3171 // For SCO, we do the can_send_now_check here 3172 hci_notify_if_sco_can_send_now(); 3173 #endif 3174 break; 3175 3176 #ifdef ENABLE_CLASSIC 3177 case HCI_EVENT_SCO_CAN_SEND_NOW: 3178 // For SCO, we do the can_send_now_check here 3179 hci_stack->sco_can_send_now = true; 3180 hci_notify_if_sco_can_send_now(); 3181 return; 3182 3183 // explode inquriy results for easier consumption 3184 case HCI_EVENT_INQUIRY_RESULT: 3185 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3186 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3187 gap_inquiry_explode(packet, size); 3188 break; 3189 #endif 3190 3191 #ifdef ENABLE_BLE 3192 case HCI_EVENT_LE_META: 3193 switch (packet[2]){ 3194 #ifdef ENABLE_LE_CENTRAL 3195 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3196 // log_info("advertising report received"); 3197 if (!hci_stack->le_scanning_enabled) break; 3198 le_handle_advertisement_report(packet, size); 3199 break; 3200 #endif 3201 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3202 event_handle_le_connection_complete(packet); 3203 break; 3204 3205 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3206 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3207 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3208 conn = hci_connection_for_handle(handle); 3209 if (!conn) break; 3210 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3211 break; 3212 3213 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3214 // connection 3215 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3216 conn = hci_connection_for_handle(handle); 3217 if (conn) { 3218 // read arguments 3219 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3220 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3221 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3222 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3223 3224 // validate against current connection parameter range 3225 le_connection_parameter_range_t existing_range; 3226 gap_get_connection_parameter_range(&existing_range); 3227 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3228 if (update_parameter){ 3229 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3230 conn->le_conn_interval_min = le_conn_interval_min; 3231 conn->le_conn_interval_max = le_conn_interval_max; 3232 conn->le_conn_latency = le_conn_latency; 3233 conn->le_supervision_timeout = le_supervision_timeout; 3234 } else { 3235 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3236 } 3237 } 3238 break; 3239 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3240 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3241 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3242 conn = hci_connection_for_handle(handle); 3243 if (conn) { 3244 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3245 } 3246 break; 3247 #endif 3248 default: 3249 break; 3250 } 3251 break; 3252 #endif 3253 case HCI_EVENT_VENDOR_SPECIFIC: 3254 // Vendor specific commands often create vendor specific event instead of num completed packets 3255 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3256 switch (hci_stack->manufacturer){ 3257 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3258 hci_stack->num_cmd_packets = 1; 3259 break; 3260 default: 3261 break; 3262 } 3263 break; 3264 default: 3265 break; 3266 } 3267 3268 handle_event_for_current_stack_state(packet, size); 3269 3270 // notify upper stack 3271 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3272 3273 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3274 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3275 handle = little_endian_read_16(packet, 3); 3276 hci_connection_t * aConn = hci_connection_for_handle(handle); 3277 // discard connection if app did not trigger a reconnect in the event handler 3278 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3279 hci_shutdown_connection(aConn); 3280 } 3281 } 3282 3283 // execute main loop 3284 hci_run(); 3285 } 3286 3287 #ifdef ENABLE_CLASSIC 3288 3289 #ifdef ENABLE_SCO_OVER_HCI 3290 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3291 static void sco_schedule_tx(hci_connection_t * conn); 3292 3293 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3294 log_debug("SCO TX Timeout"); 3295 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3296 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3297 if (!conn) return; 3298 3299 // trigger send 3300 conn->sco_tx_ready = 1; 3301 // extra packet if CVSD but SCO buffer is too short 3302 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3303 conn->sco_tx_ready++; 3304 } 3305 hci_notify_if_sco_can_send_now(); 3306 } 3307 3308 3309 #define SCO_TX_AFTER_RX_MS (6) 3310 3311 static void sco_schedule_tx(hci_connection_t * conn){ 3312 3313 uint32_t now = btstack_run_loop_get_time_ms(); 3314 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3315 int time_delta_ms = sco_tx_ms - now; 3316 3317 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3318 3319 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3320 btstack_run_loop_remove_timer(timer); 3321 btstack_run_loop_set_timer(timer, time_delta_ms); 3322 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3323 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3324 btstack_run_loop_add_timer(timer); 3325 } 3326 #endif 3327 3328 static void sco_handler(uint8_t * packet, uint16_t size){ 3329 // lookup connection struct 3330 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3331 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3332 if (!conn) return; 3333 3334 #ifdef ENABLE_SCO_OVER_HCI 3335 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3336 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3337 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3338 packet[2] = 0x3c; 3339 memmove(&packet[3], &packet[23], 63); 3340 size = 63; 3341 } 3342 } 3343 3344 if (hci_have_usb_transport()){ 3345 // Nothing to do 3346 } else { 3347 // 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); 3348 if (hci_stack->synchronous_flow_control_enabled == 0){ 3349 uint32_t now = btstack_run_loop_get_time_ms(); 3350 3351 if (!conn->sco_rx_valid){ 3352 // ignore first 10 packets 3353 conn->sco_rx_count++; 3354 // log_debug("sco rx count %u", conn->sco_rx_count); 3355 if (conn->sco_rx_count == 10) { 3356 // use first timestamp as is and pretent it just started 3357 conn->sco_rx_ms = now; 3358 conn->sco_rx_valid = 1; 3359 conn->sco_rx_count = 0; 3360 sco_schedule_tx(conn); 3361 } 3362 } else { 3363 // track expected arrival timme 3364 conn->sco_rx_count++; 3365 conn->sco_rx_ms += 7; 3366 int delta = (int32_t) (now - conn->sco_rx_ms); 3367 if (delta > 0){ 3368 conn->sco_rx_ms++; 3369 } 3370 // log_debug("sco rx %u", conn->sco_rx_ms); 3371 sco_schedule_tx(conn); 3372 } 3373 } 3374 } 3375 #endif 3376 3377 // deliver to app 3378 if (hci_stack->sco_packet_handler) { 3379 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3380 } 3381 3382 #ifdef HAVE_SCO_TRANSPORT 3383 // We can send one packet for each received packet 3384 conn->sco_tx_ready++; 3385 hci_notify_if_sco_can_send_now(); 3386 #endif 3387 3388 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3389 conn->num_packets_completed++; 3390 hci_stack->host_completed_packets = 1; 3391 hci_run(); 3392 #endif 3393 } 3394 #endif 3395 3396 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3397 hci_dump_packet(packet_type, 1, packet, size); 3398 switch (packet_type) { 3399 case HCI_EVENT_PACKET: 3400 event_handler(packet, size); 3401 break; 3402 case HCI_ACL_DATA_PACKET: 3403 acl_handler(packet, size); 3404 break; 3405 #ifdef ENABLE_CLASSIC 3406 case HCI_SCO_DATA_PACKET: 3407 sco_handler(packet, size); 3408 break; 3409 #endif 3410 default: 3411 break; 3412 } 3413 } 3414 3415 /** 3416 * @brief Add event packet handler. 3417 */ 3418 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3419 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3420 } 3421 3422 /** 3423 * @brief Remove event packet handler. 3424 */ 3425 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3426 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3427 } 3428 3429 /** Register HCI packet handlers */ 3430 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3431 hci_stack->acl_packet_handler = handler; 3432 } 3433 3434 #ifdef ENABLE_CLASSIC 3435 /** 3436 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3437 */ 3438 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3439 hci_stack->sco_packet_handler = handler; 3440 } 3441 #endif 3442 3443 static void hci_state_reset(void){ 3444 // no connections yet 3445 hci_stack->connections = NULL; 3446 3447 // keep discoverable/connectable as this has been requested by the client(s) 3448 // hci_stack->discoverable = 0; 3449 // hci_stack->connectable = 0; 3450 // hci_stack->bondable = 1; 3451 // hci_stack->own_addr_type = 0; 3452 3453 // buffer is free 3454 hci_stack->hci_packet_buffer_reserved = false; 3455 3456 // no pending cmds 3457 hci_stack->decline_reason = 0; 3458 3459 hci_stack->secure_connections_active = false; 3460 3461 #ifdef ENABLE_CLASSIC 3462 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3463 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3464 3465 hci_stack->gap_tasks = 3466 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3467 GAP_TASK_SET_CLASS_OF_DEVICE | 3468 GAP_TASK_SET_LOCAL_NAME | 3469 GAP_TASK_SET_EIR_DATA | 3470 GAP_TASK_WRITE_SCAN_ENABLE | 3471 GAP_TASK_WRITE_PAGE_TIMEOUT; 3472 #endif 3473 3474 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3475 hci_stack->classic_read_local_oob_data = false; 3476 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3477 #endif 3478 3479 // LE 3480 #ifdef ENABLE_BLE 3481 memset(hci_stack->le_random_address, 0, 6); 3482 hci_stack->le_random_address_set = 0; 3483 #endif 3484 #ifdef ENABLE_LE_CENTRAL 3485 hci_stack->le_scanning_active = false; 3486 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3487 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3488 hci_stack->le_whitelist_capacity = 0; 3489 #endif 3490 #ifdef ENABLE_LE_PERIPHERAL 3491 hci_stack->le_advertisements_active = false; 3492 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3493 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3494 } 3495 if (hci_stack->le_advertisements_data != NULL){ 3496 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3497 } 3498 #endif 3499 } 3500 3501 #ifdef ENABLE_CLASSIC 3502 /** 3503 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3504 */ 3505 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3506 // store and open remote device db 3507 hci_stack->link_key_db = link_key_db; 3508 if (hci_stack->link_key_db) { 3509 hci_stack->link_key_db->open(); 3510 } 3511 } 3512 #endif 3513 3514 void hci_init(const hci_transport_t *transport, const void *config){ 3515 3516 #ifdef HAVE_MALLOC 3517 if (!hci_stack) { 3518 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3519 } 3520 #else 3521 hci_stack = &hci_stack_static; 3522 #endif 3523 memset(hci_stack, 0, sizeof(hci_stack_t)); 3524 3525 // reference to use transport layer implementation 3526 hci_stack->hci_transport = transport; 3527 3528 // reference to used config 3529 hci_stack->config = config; 3530 3531 // setup pointer for outgoing packet buffer 3532 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3533 3534 // max acl payload size defined in config.h 3535 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3536 3537 // register packet handlers with transport 3538 transport->register_packet_handler(&packet_handler); 3539 3540 hci_stack->state = HCI_STATE_OFF; 3541 3542 // class of device 3543 hci_stack->class_of_device = 0x007a020c; // Smartphone 3544 3545 // bondable by default 3546 hci_stack->bondable = 1; 3547 3548 #ifdef ENABLE_CLASSIC 3549 // classic name 3550 hci_stack->local_name = default_classic_name; 3551 3552 // Master slave policy 3553 hci_stack->master_slave_policy = 1; 3554 3555 // Allow Role Switch 3556 hci_stack->allow_role_switch = 1; 3557 3558 // Default / minimum security level = 2 3559 hci_stack->gap_security_level = LEVEL_2; 3560 3561 // Default Security Mode 4 3562 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3563 3564 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3565 hci_stack->gap_required_encyrption_key_size = 7; 3566 3567 // Link Supervision Timeout 3568 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3569 3570 #endif 3571 3572 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3573 hci_stack->ssp_enable = 1; 3574 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3575 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3576 hci_stack->ssp_auto_accept = 1; 3577 3578 // Secure Connections: enable (requires support from Controller) 3579 hci_stack->secure_connections_enable = true; 3580 3581 // voice setting - signed 16 bit pcm data with CVSD over the air 3582 hci_stack->sco_voice_setting = 0x60; 3583 3584 #ifdef ENABLE_LE_CENTRAL 3585 // connection parameter to use for outgoing connections 3586 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3587 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3588 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3589 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3590 hci_stack->le_connection_latency = 4; // 4 3591 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3592 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3593 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3594 3595 // default LE Scanning 3596 hci_stack->le_scan_type = 0x1; // active 3597 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3598 hci_stack->le_scan_window = 0x30; // 30 ms 3599 #endif 3600 3601 #ifdef ENABLE_LE_PERIPHERAL 3602 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3603 #endif 3604 3605 // connection parameter range used to answer connection parameter update requests in l2cap 3606 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3607 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3608 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3609 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3610 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3611 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3612 3613 hci_state_reset(); 3614 } 3615 3616 void hci_deinit(void){ 3617 #ifdef HAVE_MALLOC 3618 if (hci_stack) { 3619 free(hci_stack); 3620 } 3621 #endif 3622 hci_stack = NULL; 3623 3624 #ifdef ENABLE_CLASSIC 3625 disable_l2cap_timeouts = 0; 3626 #endif 3627 } 3628 3629 /** 3630 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3631 */ 3632 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3633 hci_stack->chipset = chipset_driver; 3634 3635 // reset chipset driver - init is also called on power_up 3636 if (hci_stack->chipset && hci_stack->chipset->init){ 3637 hci_stack->chipset->init(hci_stack->config); 3638 } 3639 } 3640 3641 /** 3642 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3643 */ 3644 void hci_set_control(const btstack_control_t *hardware_control){ 3645 // references to used control implementation 3646 hci_stack->control = hardware_control; 3647 // init with transport config 3648 hardware_control->init(hci_stack->config); 3649 } 3650 3651 static void hci_discard_connections(void){ 3652 btstack_linked_list_iterator_t lit; 3653 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3654 while (btstack_linked_list_iterator_has_next(&lit)){ 3655 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3656 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3657 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3658 hci_shutdown_connection(connection); 3659 } 3660 } 3661 3662 void hci_close(void){ 3663 3664 #ifdef ENABLE_CLASSIC 3665 // close remote device db 3666 if (hci_stack->link_key_db) { 3667 hci_stack->link_key_db->close(); 3668 } 3669 #endif 3670 3671 hci_discard_connections(); 3672 3673 hci_power_control(HCI_POWER_OFF); 3674 3675 #ifdef HAVE_MALLOC 3676 free(hci_stack); 3677 #endif 3678 hci_stack = NULL; 3679 } 3680 3681 #ifdef HAVE_SCO_TRANSPORT 3682 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3683 hci_stack->sco_transport = sco_transport; 3684 sco_transport->register_packet_handler(&packet_handler); 3685 } 3686 #endif 3687 3688 #ifdef ENABLE_CLASSIC 3689 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3690 // validate ranage and set 3691 if (encryption_key_size < 7) return; 3692 if (encryption_key_size > 16) return; 3693 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3694 } 3695 3696 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3697 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3698 hci_stack->gap_security_mode = security_mode; 3699 return ERROR_CODE_SUCCESS; 3700 } else { 3701 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3702 } 3703 } 3704 3705 gap_security_mode_t gap_get_security_mode(void){ 3706 return hci_stack->gap_security_mode; 3707 } 3708 3709 void gap_set_security_level(gap_security_level_t security_level){ 3710 hci_stack->gap_security_level = security_level; 3711 } 3712 3713 gap_security_level_t gap_get_security_level(void){ 3714 if (hci_stack->gap_secure_connections_only_mode){ 3715 return LEVEL_4; 3716 } 3717 return hci_stack->gap_security_level; 3718 } 3719 3720 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3721 hci_stack->gap_minimal_service_security_level = security_level; 3722 } 3723 3724 void gap_set_secure_connections_only_mode(bool enable){ 3725 hci_stack->gap_secure_connections_only_mode = enable; 3726 } 3727 3728 bool gap_get_secure_connections_only_mode(void){ 3729 return hci_stack->gap_secure_connections_only_mode; 3730 } 3731 #endif 3732 3733 #ifdef ENABLE_CLASSIC 3734 void gap_set_class_of_device(uint32_t class_of_device){ 3735 hci_stack->class_of_device = class_of_device; 3736 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3737 hci_run(); 3738 } 3739 3740 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3741 hci_stack->default_link_policy_settings = default_link_policy_settings; 3742 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3743 hci_run(); 3744 } 3745 3746 void gap_set_allow_role_switch(bool allow_role_switch){ 3747 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3748 } 3749 3750 uint8_t hci_get_allow_role_switch(void){ 3751 return hci_stack->allow_role_switch; 3752 } 3753 3754 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3755 hci_stack->link_supervision_timeout = link_supervision_timeout; 3756 } 3757 3758 void hci_disable_l2cap_timeout_check(void){ 3759 disable_l2cap_timeouts = 1; 3760 } 3761 #endif 3762 3763 #ifndef HAVE_HOST_CONTROLLER_API 3764 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3765 void hci_set_bd_addr(bd_addr_t addr){ 3766 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3767 hci_stack->custom_bd_addr_set = 1; 3768 } 3769 #endif 3770 3771 // State-Module-Driver overview 3772 // state module low-level 3773 // HCI_STATE_OFF off close 3774 // HCI_STATE_INITIALIZING, on open 3775 // HCI_STATE_WORKING, on open 3776 // HCI_STATE_HALTING, on open 3777 // HCI_STATE_SLEEPING, off/sleep close 3778 // HCI_STATE_FALLING_ASLEEP on open 3779 3780 static int hci_power_control_on(void){ 3781 3782 // power on 3783 int err = 0; 3784 if (hci_stack->control && hci_stack->control->on){ 3785 err = (*hci_stack->control->on)(); 3786 } 3787 if (err){ 3788 log_error( "POWER_ON failed"); 3789 hci_emit_hci_open_failed(); 3790 return err; 3791 } 3792 3793 // int chipset driver 3794 if (hci_stack->chipset && hci_stack->chipset->init){ 3795 hci_stack->chipset->init(hci_stack->config); 3796 } 3797 3798 // init transport 3799 if (hci_stack->hci_transport->init){ 3800 hci_stack->hci_transport->init(hci_stack->config); 3801 } 3802 3803 // open transport 3804 err = hci_stack->hci_transport->open(); 3805 if (err){ 3806 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3807 if (hci_stack->control && hci_stack->control->off){ 3808 (*hci_stack->control->off)(); 3809 } 3810 hci_emit_hci_open_failed(); 3811 return err; 3812 } 3813 return 0; 3814 } 3815 3816 static void hci_power_control_off(void){ 3817 3818 log_info("hci_power_control_off"); 3819 3820 // close low-level device 3821 hci_stack->hci_transport->close(); 3822 3823 log_info("hci_power_control_off - hci_transport closed"); 3824 3825 // power off 3826 if (hci_stack->control && hci_stack->control->off){ 3827 (*hci_stack->control->off)(); 3828 } 3829 3830 log_info("hci_power_control_off - control closed"); 3831 3832 hci_stack->state = HCI_STATE_OFF; 3833 } 3834 3835 static void hci_power_control_sleep(void){ 3836 3837 log_info("hci_power_control_sleep"); 3838 3839 #if 0 3840 // don't close serial port during sleep 3841 3842 // close low-level device 3843 hci_stack->hci_transport->close(hci_stack->config); 3844 #endif 3845 3846 // sleep mode 3847 if (hci_stack->control && hci_stack->control->sleep){ 3848 (*hci_stack->control->sleep)(); 3849 } 3850 3851 hci_stack->state = HCI_STATE_SLEEPING; 3852 } 3853 3854 static int hci_power_control_wake(void){ 3855 3856 log_info("hci_power_control_wake"); 3857 3858 // wake on 3859 if (hci_stack->control && hci_stack->control->wake){ 3860 (*hci_stack->control->wake)(); 3861 } 3862 3863 #if 0 3864 // open low-level device 3865 int err = hci_stack->hci_transport->open(hci_stack->config); 3866 if (err){ 3867 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3868 if (hci_stack->control && hci_stack->control->off){ 3869 (*hci_stack->control->off)(); 3870 } 3871 hci_emit_hci_open_failed(); 3872 return err; 3873 } 3874 #endif 3875 3876 return 0; 3877 } 3878 3879 static void hci_power_transition_to_initializing(void){ 3880 // set up state machine 3881 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3882 hci_stack->hci_packet_buffer_reserved = false; 3883 hci_stack->state = HCI_STATE_INITIALIZING; 3884 hci_stack->substate = HCI_INIT_SEND_RESET; 3885 } 3886 3887 // returns error 3888 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3889 int err; 3890 switch (power_mode){ 3891 case HCI_POWER_ON: 3892 err = hci_power_control_on(); 3893 if (err != 0) { 3894 log_error("hci_power_control_on() error %d", err); 3895 return err; 3896 } 3897 hci_power_transition_to_initializing(); 3898 break; 3899 case HCI_POWER_OFF: 3900 // do nothing 3901 break; 3902 case HCI_POWER_SLEEP: 3903 // do nothing (with SLEEP == OFF) 3904 break; 3905 default: 3906 btstack_assert(false); 3907 break; 3908 } 3909 return ERROR_CODE_SUCCESS; 3910 } 3911 3912 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3913 switch (power_mode){ 3914 case HCI_POWER_ON: 3915 // do nothing 3916 break; 3917 case HCI_POWER_OFF: 3918 // no connections yet, just turn it off 3919 hci_power_control_off(); 3920 break; 3921 case HCI_POWER_SLEEP: 3922 // no connections yet, just turn it off 3923 hci_power_control_sleep(); 3924 break; 3925 default: 3926 btstack_assert(false); 3927 break; 3928 } 3929 return ERROR_CODE_SUCCESS; 3930 } 3931 3932 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3933 switch (power_mode){ 3934 case HCI_POWER_ON: 3935 // do nothing 3936 break; 3937 case HCI_POWER_OFF: 3938 // see hci_run 3939 hci_stack->state = HCI_STATE_HALTING; 3940 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3941 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 3942 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 3943 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3944 btstack_run_loop_add_timer(&hci_stack->timeout); 3945 break; 3946 case HCI_POWER_SLEEP: 3947 // see hci_run 3948 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3949 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3950 break; 3951 default: 3952 btstack_assert(false); 3953 break; 3954 } 3955 return ERROR_CODE_SUCCESS; 3956 } 3957 3958 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3959 switch (power_mode){ 3960 case HCI_POWER_ON: 3961 hci_power_transition_to_initializing(); 3962 break; 3963 case HCI_POWER_OFF: 3964 // do nothing 3965 break; 3966 case HCI_POWER_SLEEP: 3967 // see hci_run 3968 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3969 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3970 break; 3971 default: 3972 btstack_assert(false); 3973 break; 3974 } 3975 return ERROR_CODE_SUCCESS; 3976 } 3977 3978 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3979 switch (power_mode){ 3980 case HCI_POWER_ON: 3981 hci_power_transition_to_initializing(); 3982 break; 3983 case HCI_POWER_OFF: 3984 // see hci_run 3985 hci_stack->state = HCI_STATE_HALTING; 3986 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3987 break; 3988 case HCI_POWER_SLEEP: 3989 // do nothing 3990 break; 3991 default: 3992 btstack_assert(false); 3993 break; 3994 } 3995 return ERROR_CODE_SUCCESS; 3996 } 3997 3998 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3999 int err; 4000 switch (power_mode){ 4001 case HCI_POWER_ON: 4002 err = hci_power_control_wake(); 4003 if (err) return err; 4004 hci_power_transition_to_initializing(); 4005 break; 4006 case HCI_POWER_OFF: 4007 hci_stack->state = HCI_STATE_HALTING; 4008 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4009 break; 4010 case HCI_POWER_SLEEP: 4011 // do nothing 4012 break; 4013 default: 4014 btstack_assert(false); 4015 break; 4016 } 4017 return ERROR_CODE_SUCCESS; 4018 } 4019 4020 int hci_power_control(HCI_POWER_MODE power_mode){ 4021 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4022 int err = 0; 4023 switch (hci_stack->state){ 4024 case HCI_STATE_OFF: 4025 err = hci_power_control_state_off(power_mode); 4026 break; 4027 case HCI_STATE_INITIALIZING: 4028 err = hci_power_control_state_initializing(power_mode); 4029 break; 4030 case HCI_STATE_WORKING: 4031 err = hci_power_control_state_working(power_mode); 4032 break; 4033 case HCI_STATE_HALTING: 4034 err = hci_power_control_state_halting(power_mode); 4035 break; 4036 case HCI_STATE_FALLING_ASLEEP: 4037 err = hci_power_control_state_falling_asleep(power_mode); 4038 break; 4039 case HCI_STATE_SLEEPING: 4040 err = hci_power_control_state_sleeping(power_mode); 4041 break; 4042 default: 4043 btstack_assert(false); 4044 break; 4045 } 4046 if (err != 0){ 4047 return err; 4048 } 4049 4050 // create internal event 4051 hci_emit_state(); 4052 4053 // trigger next/first action 4054 hci_run(); 4055 4056 return 0; 4057 } 4058 4059 4060 static void hci_halting_run(void){ 4061 4062 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4063 4064 hci_connection_t * connection; 4065 4066 switch (hci_stack->substate) { 4067 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4068 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4069 4070 #ifdef ENABLE_BLE 4071 #ifdef ENABLE_LE_CENTRAL 4072 hci_whitelist_free(); 4073 #endif 4074 #endif 4075 // close all open connections 4076 connection = (hci_connection_t *) hci_stack->connections; 4077 if (connection) { 4078 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4079 if (!hci_can_send_command_packet_now()) return; 4080 4081 // check state 4082 if (connection->state == SENT_DISCONNECT) return; 4083 connection->state = SENT_DISCONNECT; 4084 4085 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4086 4087 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4088 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4089 4090 // ... which would be ignored anyway as we shutdown (free) the connection now 4091 hci_shutdown_connection(connection); 4092 4093 // finally, send the disconnect command 4094 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4095 return; 4096 } 4097 4098 btstack_run_loop_remove_timer(&hci_stack->timeout); 4099 4100 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4101 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4102 log_info("HCI_STATE_HALTING: wait 50 ms"); 4103 hci_stack->substate = HCI_HALTING_W4_TIMER; 4104 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4105 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4106 btstack_run_loop_add_timer(&hci_stack->timeout); 4107 break; 4108 } 4109 4110 /* fall through */ 4111 4112 case HCI_HALTING_CLOSE: 4113 // close left over connections (that had not been properly closed before) 4114 hci_discard_connections(); 4115 4116 log_info("HCI_STATE_HALTING, calling off"); 4117 4118 // switch mode 4119 hci_power_control_off(); 4120 4121 log_info("HCI_STATE_HALTING, emitting state"); 4122 hci_emit_state(); 4123 log_info("HCI_STATE_HALTING, done"); 4124 break; 4125 4126 case HCI_HALTING_W4_TIMER: 4127 // keep waiting 4128 4129 break; 4130 default: 4131 break; 4132 } 4133 }; 4134 4135 static void hci_falling_asleep_run(void){ 4136 hci_connection_t * connection; 4137 switch(hci_stack->substate) { 4138 case HCI_FALLING_ASLEEP_DISCONNECT: 4139 log_info("HCI_STATE_FALLING_ASLEEP"); 4140 // close all open connections 4141 connection = (hci_connection_t *) hci_stack->connections; 4142 if (connection){ 4143 4144 // send disconnect 4145 if (!hci_can_send_command_packet_now()) return; 4146 4147 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4148 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4149 4150 // send disconnected event right away - causes higher layer connections to get closed, too. 4151 hci_shutdown_connection(connection); 4152 return; 4153 } 4154 4155 if (hci_classic_supported()){ 4156 // disable page and inquiry scan 4157 if (!hci_can_send_command_packet_now()) return; 4158 4159 log_info("HCI_STATE_HALTING, disabling inq scans"); 4160 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4161 4162 // continue in next sub state 4163 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4164 break; 4165 } 4166 4167 /* fall through */ 4168 4169 case HCI_FALLING_ASLEEP_COMPLETE: 4170 log_info("HCI_STATE_HALTING, calling sleep"); 4171 // switch mode 4172 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4173 hci_emit_state(); 4174 break; 4175 4176 default: 4177 break; 4178 } 4179 } 4180 4181 #ifdef ENABLE_CLASSIC 4182 4183 static void hci_update_scan_enable(void){ 4184 // 2 = page scan, 1 = inq scan 4185 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4186 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4187 hci_run(); 4188 } 4189 4190 void gap_discoverable_control(uint8_t enable){ 4191 if (enable) enable = 1; // normalize argument 4192 4193 if (hci_stack->discoverable == enable){ 4194 hci_emit_discoverable_enabled(hci_stack->discoverable); 4195 return; 4196 } 4197 4198 hci_stack->discoverable = enable; 4199 hci_update_scan_enable(); 4200 } 4201 4202 void gap_connectable_control(uint8_t enable){ 4203 if (enable) enable = 1; // normalize argument 4204 4205 // don't emit event 4206 if (hci_stack->connectable == enable) return; 4207 4208 hci_stack->connectable = enable; 4209 hci_update_scan_enable(); 4210 } 4211 #endif 4212 4213 void gap_local_bd_addr(bd_addr_t address_buffer){ 4214 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4215 } 4216 4217 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4218 static void hci_host_num_completed_packets(void){ 4219 4220 // create packet manually as arrays are not supported and num_commands should not get reduced 4221 hci_reserve_packet_buffer(); 4222 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4223 4224 uint16_t size = 0; 4225 uint16_t num_handles = 0; 4226 packet[size++] = 0x35; 4227 packet[size++] = 0x0c; 4228 size++; // skip param len 4229 size++; // skip num handles 4230 4231 // add { handle, packets } entries 4232 btstack_linked_item_t * it; 4233 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4234 hci_connection_t * connection = (hci_connection_t *) it; 4235 if (connection->num_packets_completed){ 4236 little_endian_store_16(packet, size, connection->con_handle); 4237 size += 2; 4238 little_endian_store_16(packet, size, connection->num_packets_completed); 4239 size += 2; 4240 // 4241 num_handles++; 4242 connection->num_packets_completed = 0; 4243 } 4244 } 4245 4246 packet[2] = size - 3; 4247 packet[3] = num_handles; 4248 4249 hci_stack->host_completed_packets = 0; 4250 4251 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4252 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4253 4254 // release packet buffer for synchronous transport implementations 4255 if (hci_transport_synchronous()){ 4256 hci_release_packet_buffer(); 4257 hci_emit_transport_packet_sent(); 4258 } 4259 } 4260 #endif 4261 4262 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4263 UNUSED(ds); 4264 hci_stack->substate = HCI_HALTING_CLOSE; 4265 // allow packet handlers to defer final shutdown 4266 hci_emit_state(); 4267 hci_run(); 4268 } 4269 4270 static bool hci_run_acl_fragments(void){ 4271 if (hci_stack->acl_fragmentation_total_size > 0u) { 4272 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4273 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4274 if (connection) { 4275 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4276 hci_send_acl_packet_fragments(connection); 4277 return true; 4278 } 4279 } else { 4280 // connection gone -> discard further fragments 4281 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4282 hci_stack->acl_fragmentation_total_size = 0; 4283 hci_stack->acl_fragmentation_pos = 0; 4284 } 4285 } 4286 return false; 4287 } 4288 4289 #ifdef ENABLE_CLASSIC 4290 static bool hci_run_general_gap_classic(void){ 4291 4292 // assert stack is working and classic is active 4293 if (hci_classic_supported() == false) return false; 4294 if (hci_stack->state != HCI_STATE_WORKING) return false; 4295 4296 // decline incoming connections 4297 if (hci_stack->decline_reason){ 4298 uint8_t reason = hci_stack->decline_reason; 4299 hci_stack->decline_reason = 0; 4300 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4301 return true; 4302 } 4303 4304 if (hci_stack->gap_tasks != 0){ 4305 hci_run_gap_tasks_classic(); 4306 return true; 4307 } 4308 4309 // start/stop inquiry 4310 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4311 uint8_t duration = hci_stack->inquiry_state; 4312 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4313 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4314 return true; 4315 } 4316 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4317 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4318 hci_send_cmd(&hci_inquiry_cancel); 4319 return true; 4320 } 4321 // remote name request 4322 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4323 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4324 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4325 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4326 return true; 4327 } 4328 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4329 // Local OOB data 4330 if (hci_stack->classic_read_local_oob_data){ 4331 hci_stack->classic_read_local_oob_data = false; 4332 if (hci_stack->local_supported_commands[1] & 0x10u){ 4333 hci_send_cmd(&hci_read_local_extended_oob_data); 4334 } else { 4335 hci_send_cmd(&hci_read_local_oob_data); 4336 } 4337 } 4338 #endif 4339 // pairing 4340 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4341 uint8_t state = hci_stack->gap_pairing_state; 4342 uint8_t pin_code[16]; 4343 switch (state){ 4344 case GAP_PAIRING_STATE_SEND_PIN: 4345 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4346 memset(pin_code, 0, 16); 4347 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4348 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4349 break; 4350 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4351 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4352 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4353 break; 4354 case GAP_PAIRING_STATE_SEND_PASSKEY: 4355 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4356 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4357 break; 4358 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4359 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4360 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4361 break; 4362 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4363 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4364 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4365 break; 4366 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4367 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4368 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4369 break; 4370 default: 4371 break; 4372 } 4373 return true; 4374 } 4375 return false; 4376 } 4377 #endif 4378 4379 #ifdef ENABLE_BLE 4380 static bool hci_run_general_gap_le(void){ 4381 4382 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4383 4384 if (hci_stack->state != HCI_STATE_WORKING) return false; 4385 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4386 4387 4388 // Phase 1: collect what to stop 4389 4390 bool scanning_stop = false; 4391 bool connecting_stop = false; 4392 bool advertising_stop = false; 4393 4394 #ifndef ENABLE_LE_CENTRAL 4395 UNUSED(scanning_stop); 4396 UNUSED(connecting_stop); 4397 #endif 4398 #ifndef ENABLE_LE_PERIPHERAL 4399 UNUSED(advertising_stop); 4400 #endif 4401 4402 // check if own address changes 4403 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4404 4405 // check if whitelist needs modification 4406 bool whitelist_modification_pending = false; 4407 btstack_linked_list_iterator_t lit; 4408 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4409 while (btstack_linked_list_iterator_has_next(&lit)){ 4410 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4411 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4412 whitelist_modification_pending = true; 4413 break; 4414 } 4415 } 4416 // check if resolving list needs modification 4417 bool resolving_list_modification_pending = false; 4418 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4419 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4420 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4421 resolving_list_modification_pending = true; 4422 } 4423 #endif 4424 4425 #ifdef ENABLE_LE_CENTRAL 4426 // scanning control 4427 if (hci_stack->le_scanning_active) { 4428 // stop if: 4429 // - parameter change required 4430 // - it's disabled 4431 // - whitelist change required but used for scanning 4432 // - resolving list modified 4433 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4434 if ((hci_stack->le_scanning_param_update) || 4435 !hci_stack->le_scanning_enabled || 4436 scanning_uses_whitelist || 4437 resolving_list_modification_pending){ 4438 4439 scanning_stop = true; 4440 } 4441 } 4442 #endif 4443 4444 #ifdef ENABLE_LE_CENTRAL 4445 // connecting control 4446 bool connecting_with_whitelist; 4447 switch (hci_stack->le_connecting_state){ 4448 case LE_CONNECTING_DIRECT: 4449 case LE_CONNECTING_WHITELIST: 4450 // stop connecting if: 4451 // - connecting uses white and whitelist modification pending 4452 // - if it got disabled 4453 // - resolving list modified 4454 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4455 if ((connecting_with_whitelist && whitelist_modification_pending) || 4456 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4457 resolving_list_modification_pending) { 4458 4459 connecting_stop = true; 4460 } 4461 break; 4462 default: 4463 break; 4464 } 4465 #endif 4466 4467 #ifdef ENABLE_LE_PERIPHERAL 4468 // le advertisement control 4469 if (hci_stack->le_advertisements_active){ 4470 // stop if: 4471 // - parameter change required 4472 // - random address used in advertising and changes 4473 // - it's disabled 4474 // - whitelist change required but used for advertisement filter policy 4475 // - resolving list modified 4476 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4477 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4478 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4479 if (advertising_change || 4480 (advertising_uses_random_address && random_address_change) || 4481 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4482 (advertising_uses_whitelist && whitelist_modification_pending) || 4483 resolving_list_modification_pending) { 4484 4485 advertising_stop = true; 4486 } 4487 } 4488 #endif 4489 4490 4491 // Phase 2: stop everything that should be off during modifications 4492 4493 #ifdef ENABLE_LE_CENTRAL 4494 if (scanning_stop){ 4495 hci_stack->le_scanning_active = false; 4496 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4497 return true; 4498 } 4499 #endif 4500 4501 #ifdef ENABLE_LE_CENTRAL 4502 if (connecting_stop){ 4503 hci_send_cmd(&hci_le_create_connection_cancel); 4504 return true; 4505 } 4506 #endif 4507 4508 #ifdef ENABLE_LE_PERIPHERAL 4509 if (advertising_stop){ 4510 hci_stack->le_advertisements_active = false; 4511 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4512 return true; 4513 } 4514 #endif 4515 4516 // Phase 3: modify 4517 4518 if (random_address_change){ 4519 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4520 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4521 return true; 4522 } 4523 4524 #ifdef ENABLE_LE_CENTRAL 4525 if (hci_stack->le_scanning_param_update){ 4526 hci_stack->le_scanning_param_update = false; 4527 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4528 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4529 return true; 4530 } 4531 #endif 4532 4533 #ifdef ENABLE_LE_PERIPHERAL 4534 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4535 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4536 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4537 hci_send_cmd(&hci_le_set_advertising_parameters, 4538 hci_stack->le_advertisements_interval_min, 4539 hci_stack->le_advertisements_interval_max, 4540 hci_stack->le_advertisements_type, 4541 hci_stack->le_advertisements_own_addr_type, 4542 hci_stack->le_advertisements_direct_address_type, 4543 hci_stack->le_advertisements_direct_address, 4544 hci_stack->le_advertisements_channel_map, 4545 hci_stack->le_advertisements_filter_policy); 4546 return true; 4547 } 4548 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4549 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4550 uint8_t adv_data_clean[31]; 4551 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4552 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4553 hci_stack->le_advertisements_data_len); 4554 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4555 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4556 return true; 4557 } 4558 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4559 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4560 uint8_t scan_data_clean[31]; 4561 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4562 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4563 hci_stack->le_scan_response_data_len); 4564 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4565 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4566 return true; 4567 } 4568 #endif 4569 4570 4571 #ifdef ENABLE_LE_CENTRAL 4572 // if connect with whitelist was active and is not cancelled yet, wait until next time 4573 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4574 #endif 4575 4576 // LE Whitelist Management 4577 if (whitelist_modification_pending){ 4578 // add/remove entries 4579 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4580 while (btstack_linked_list_iterator_has_next(&lit)){ 4581 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4582 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4583 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4584 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4585 return true; 4586 } 4587 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4588 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4589 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4590 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4591 return true; 4592 } 4593 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4594 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4595 btstack_memory_whitelist_entry_free(entry); 4596 } 4597 } 4598 } 4599 4600 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4601 // LE Resolving List Management 4602 if (resolving_list_supported) { 4603 uint16_t i; 4604 switch (hci_stack->le_resolving_list_state) { 4605 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4606 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4607 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4608 return true; 4609 case LE_RESOLVING_LIST_READ_SIZE: 4610 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4611 hci_send_cmd(&hci_le_read_resolving_list_size); 4612 return true; 4613 case LE_RESOLVING_LIST_SEND_CLEAR: 4614 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4615 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4616 sizeof(hci_stack->le_resolving_list_add_entries)); 4617 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4618 sizeof(hci_stack->le_resolving_list_remove_entries)); 4619 hci_send_cmd(&hci_le_clear_resolving_list); 4620 return true; 4621 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4622 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4623 uint8_t offset = i >> 3; 4624 uint8_t mask = 1 << (i & 7); 4625 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4626 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4627 bd_addr_t peer_identity_addreses; 4628 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4629 sm_key_t peer_irk; 4630 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4631 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4632 4633 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4634 // trigger whitelist entry 'update' (work around for controller bug) 4635 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4636 while (btstack_linked_list_iterator_has_next(&lit)) { 4637 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4638 if (entry->address_type != peer_identity_addr_type) continue; 4639 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4640 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4641 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4642 } 4643 #endif 4644 4645 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4646 peer_identity_addreses); 4647 return true; 4648 } 4649 4650 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4651 4652 /* fall through */ 4653 4654 case LE_RESOLVING_LIST_ADD_ENTRIES: 4655 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4656 uint8_t offset = i >> 3; 4657 uint8_t mask = 1 << (i & 7); 4658 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4659 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4660 bd_addr_t peer_identity_addreses; 4661 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4662 sm_key_t peer_irk; 4663 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4664 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4665 const uint8_t *local_irk = gap_get_persistent_irk(); 4666 // command uses format specifier 'P' that stores 16-byte value without flip 4667 uint8_t local_irk_flipped[16]; 4668 uint8_t peer_irk_flipped[16]; 4669 reverse_128(local_irk, local_irk_flipped); 4670 reverse_128(peer_irk, peer_irk_flipped); 4671 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4672 peer_irk_flipped, local_irk_flipped); 4673 return true; 4674 } 4675 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4676 break; 4677 4678 default: 4679 break; 4680 } 4681 } 4682 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4683 #endif 4684 4685 // Phase 4: restore state 4686 4687 #ifdef ENABLE_LE_CENTRAL 4688 // re-start scanning 4689 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4690 hci_stack->le_scanning_active = true; 4691 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4692 return true; 4693 } 4694 #endif 4695 4696 #ifdef ENABLE_LE_CENTRAL 4697 // re-start connecting 4698 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4699 bd_addr_t null_addr; 4700 memset(null_addr, 0, 6); 4701 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4702 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4703 hci_send_cmd(&hci_le_create_connection, 4704 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4705 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4706 1, // use whitelist 4707 0, // peer address type 4708 null_addr, // peer bd addr 4709 hci_stack->le_connection_own_addr_type, // our addr type: 4710 hci_stack->le_connection_interval_min, // conn interval min 4711 hci_stack->le_connection_interval_max, // conn interval max 4712 hci_stack->le_connection_latency, // conn latency 4713 hci_stack->le_supervision_timeout, // conn latency 4714 hci_stack->le_minimum_ce_length, // min ce length 4715 hci_stack->le_maximum_ce_length // max ce length 4716 ); 4717 return true; 4718 } 4719 #endif 4720 4721 #ifdef ENABLE_LE_PERIPHERAL 4722 // re-start advertising 4723 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4724 // check if advertisements should be enabled given 4725 hci_stack->le_advertisements_active = true; 4726 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4727 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4728 return true; 4729 } 4730 #endif 4731 4732 return false; 4733 } 4734 #endif 4735 4736 static bool hci_run_general_pending_commands(void){ 4737 btstack_linked_item_t * it; 4738 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4739 hci_connection_t * connection = (hci_connection_t *) it; 4740 4741 switch(connection->state){ 4742 case SEND_CREATE_CONNECTION: 4743 switch(connection->address_type){ 4744 #ifdef ENABLE_CLASSIC 4745 case BD_ADDR_TYPE_ACL: 4746 log_info("sending hci_create_connection"); 4747 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4748 break; 4749 #endif 4750 default: 4751 #ifdef ENABLE_BLE 4752 #ifdef ENABLE_LE_CENTRAL 4753 log_info("sending hci_le_create_connection"); 4754 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4755 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4756 hci_send_cmd(&hci_le_create_connection, 4757 hci_stack->le_connection_scan_interval, // conn scan interval 4758 hci_stack->le_connection_scan_window, // conn scan windows 4759 0, // don't use whitelist 4760 connection->address_type, // peer address type 4761 connection->address, // peer bd addr 4762 hci_stack->le_connection_own_addr_type, // our addr type: 4763 hci_stack->le_connection_interval_min, // conn interval min 4764 hci_stack->le_connection_interval_max, // conn interval max 4765 hci_stack->le_connection_latency, // conn latency 4766 hci_stack->le_supervision_timeout, // conn latency 4767 hci_stack->le_minimum_ce_length, // min ce length 4768 hci_stack->le_maximum_ce_length // max ce length 4769 ); 4770 connection->state = SENT_CREATE_CONNECTION; 4771 #endif 4772 #endif 4773 break; 4774 } 4775 return true; 4776 4777 #ifdef ENABLE_CLASSIC 4778 case RECEIVED_CONNECTION_REQUEST: 4779 connection->role = HCI_ROLE_SLAVE; 4780 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4781 log_info("sending hci_accept_connection_request"); 4782 connection->state = ACCEPTED_CONNECTION_REQUEST; 4783 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4784 } 4785 return true; 4786 #endif 4787 4788 #ifdef ENABLE_BLE 4789 #ifdef ENABLE_LE_CENTRAL 4790 case SEND_CANCEL_CONNECTION: 4791 connection->state = SENT_CANCEL_CONNECTION; 4792 hci_send_cmd(&hci_le_create_connection_cancel); 4793 return true; 4794 #endif 4795 #endif 4796 case SEND_DISCONNECT: 4797 connection->state = SENT_DISCONNECT; 4798 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4799 return true; 4800 4801 default: 4802 break; 4803 } 4804 4805 // no further commands if connection is about to get shut down 4806 if (connection->state == SENT_DISCONNECT) continue; 4807 4808 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4809 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4810 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4811 return true; 4812 } 4813 4814 #ifdef ENABLE_CLASSIC 4815 4816 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4817 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4818 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4819 return true; 4820 } 4821 4822 // Handling link key request requires remote supported features 4823 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4824 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4825 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4826 4827 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4828 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4829 if (have_link_key && security_level_sufficient){ 4830 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4831 } else { 4832 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4833 } 4834 return true; 4835 } 4836 4837 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4838 log_info("denying to pin request"); 4839 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4840 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4841 return true; 4842 } 4843 4844 // security assessment requires remote features 4845 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4846 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4847 hci_ssp_assess_security_on_io_cap_request(connection); 4848 // 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 4849 } 4850 4851 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4852 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4853 // set authentication requirements: 4854 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4855 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4856 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4857 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4858 authreq |= 1; 4859 } 4860 bool bonding = hci_stack->bondable; 4861 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4862 // if we have received IO Cap Response, we're in responder role 4863 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4864 if (bonding && !remote_bonding){ 4865 log_info("Remote not bonding, dropping local flag"); 4866 bonding = false; 4867 } 4868 } 4869 if (bonding){ 4870 if (connection->bonding_flags & BONDING_DEDICATED){ 4871 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4872 } else { 4873 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4874 } 4875 } 4876 uint8_t have_oob_data = 0; 4877 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4878 if (connection->classic_oob_c_192 != NULL){ 4879 have_oob_data |= 1; 4880 } 4881 if (connection->classic_oob_c_256 != NULL){ 4882 have_oob_data |= 2; 4883 } 4884 #endif 4885 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4886 return true; 4887 } 4888 4889 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4890 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4891 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4892 return true; 4893 } 4894 4895 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4896 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4897 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4898 const uint8_t zero[16] = { 0 }; 4899 const uint8_t * r_192 = zero; 4900 const uint8_t * c_192 = zero; 4901 const uint8_t * r_256 = zero; 4902 const uint8_t * c_256 = zero; 4903 // verify P-256 OOB 4904 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4905 c_256 = connection->classic_oob_c_256; 4906 if (connection->classic_oob_r_256 != NULL) { 4907 r_256 = connection->classic_oob_r_256; 4908 } 4909 } 4910 // verify P-192 OOB 4911 if ((connection->classic_oob_c_192 != NULL)) { 4912 c_192 = connection->classic_oob_c_192; 4913 if (connection->classic_oob_r_192 != NULL) { 4914 r_192 = connection->classic_oob_r_192; 4915 } 4916 } 4917 4918 // assess security 4919 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4920 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4921 if (need_level_4 && !can_reach_level_4){ 4922 log_info("Level 4 required, but not possible -> abort"); 4923 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4924 // send oob negative reply 4925 c_256 = NULL; 4926 c_192 = NULL; 4927 } 4928 4929 // Reply 4930 if (c_256 != zero) { 4931 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4932 } else if (c_192 != zero){ 4933 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4934 } else { 4935 hci_stack->classic_oob_con_handle = connection->con_handle; 4936 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4937 } 4938 return true; 4939 } 4940 #endif 4941 4942 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4943 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4944 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4945 return true; 4946 } 4947 4948 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4949 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4950 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4951 return true; 4952 } 4953 4954 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4955 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4956 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4957 return true; 4958 } 4959 4960 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4961 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4962 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4963 connection->state = SENT_DISCONNECT; 4964 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4965 return true; 4966 } 4967 4968 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4969 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4970 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4971 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4972 return true; 4973 } 4974 4975 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4976 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4977 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4978 return true; 4979 } 4980 4981 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4982 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4983 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4984 return true; 4985 } 4986 4987 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4988 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4989 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4990 return true; 4991 } 4992 4993 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4994 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4995 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4996 return true; 4997 } 4998 4999 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5000 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5001 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5002 return true; 5003 } 5004 #endif 5005 5006 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5007 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5008 #ifdef ENABLE_CLASSIC 5009 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5010 #endif 5011 if (connection->state != SENT_DISCONNECT){ 5012 connection->state = SENT_DISCONNECT; 5013 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5014 return true; 5015 } 5016 } 5017 5018 #ifdef ENABLE_CLASSIC 5019 uint16_t sniff_min_interval; 5020 switch (connection->sniff_min_interval){ 5021 case 0: 5022 break; 5023 case 0xffff: 5024 connection->sniff_min_interval = 0; 5025 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5026 return true; 5027 default: 5028 sniff_min_interval = connection->sniff_min_interval; 5029 connection->sniff_min_interval = 0; 5030 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5031 return true; 5032 } 5033 5034 if (connection->sniff_subrating_max_latency != 0xffff){ 5035 uint16_t max_latency = connection->sniff_subrating_max_latency; 5036 connection->sniff_subrating_max_latency = 0; 5037 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5038 return true; 5039 } 5040 5041 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5042 uint8_t service_type = (uint8_t) connection->qos_service_type; 5043 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5044 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); 5045 return true; 5046 } 5047 5048 if (connection->request_role != HCI_ROLE_INVALID){ 5049 hci_role_t role = connection->request_role; 5050 connection->request_role = HCI_ROLE_INVALID; 5051 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5052 return true; 5053 } 5054 #endif 5055 5056 #ifdef ENABLE_BLE 5057 switch (connection->le_con_parameter_update_state){ 5058 // response to L2CAP CON PARAMETER UPDATE REQUEST 5059 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5060 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5061 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5062 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5063 0x0000, 0xffff); 5064 return true; 5065 case CON_PARAMETER_UPDATE_REPLY: 5066 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5067 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5068 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5069 0x0000, 0xffff); 5070 return true; 5071 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5072 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5073 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5074 return true; 5075 default: 5076 break; 5077 } 5078 if (connection->le_phy_update_all_phys != 0xffu){ 5079 uint8_t all_phys = connection->le_phy_update_all_phys; 5080 connection->le_phy_update_all_phys = 0xff; 5081 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); 5082 return true; 5083 } 5084 #endif 5085 } 5086 return false; 5087 } 5088 5089 static void hci_run(void){ 5090 5091 // stack state sub statemachines 5092 // halting needs to be called even if we cannot send command packet now 5093 switch (hci_stack->state) { 5094 case HCI_STATE_INITIALIZING: 5095 hci_initializing_run(); 5096 break; 5097 case HCI_STATE_HALTING: 5098 hci_halting_run(); 5099 break; 5100 case HCI_STATE_FALLING_ASLEEP: 5101 hci_falling_asleep_run(); 5102 break; 5103 default: 5104 break; 5105 } 5106 5107 bool done; 5108 5109 // send continuation fragments first, as they block the prepared packet buffer 5110 done = hci_run_acl_fragments(); 5111 if (done) return; 5112 5113 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5114 // send host num completed packets next as they don't require num_cmd_packets > 0 5115 if (!hci_can_send_comand_packet_transport()) return; 5116 if (hci_stack->host_completed_packets){ 5117 hci_host_num_completed_packets(); 5118 return; 5119 } 5120 #endif 5121 5122 if (!hci_can_send_command_packet_now()) return; 5123 5124 // global/non-connection oriented commands 5125 5126 5127 #ifdef ENABLE_CLASSIC 5128 // general gap classic 5129 done = hci_run_general_gap_classic(); 5130 if (done) return; 5131 #endif 5132 5133 #ifdef ENABLE_BLE 5134 // general gap le 5135 done = hci_run_general_gap_le(); 5136 if (done) return; 5137 #endif 5138 5139 // send pending HCI commands 5140 hci_run_general_pending_commands(); 5141 } 5142 5143 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5144 // house-keeping 5145 5146 #ifdef ENABLE_CLASSIC 5147 bd_addr_t addr; 5148 hci_connection_t * conn; 5149 #endif 5150 #ifdef ENABLE_LE_CENTRAL 5151 uint8_t initiator_filter_policy; 5152 #endif 5153 5154 uint16_t opcode = little_endian_read_16(packet, 0); 5155 switch (opcode) { 5156 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5157 hci_stack->loopback_mode = packet[3]; 5158 break; 5159 5160 #ifdef ENABLE_CLASSIC 5161 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5162 reverse_bd_addr(&packet[3], addr); 5163 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5164 5165 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5166 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5167 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5168 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5169 } 5170 5171 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5172 if (!conn) { 5173 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5174 if (!conn) { 5175 // notify client that alloc failed 5176 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5177 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5178 } 5179 conn->state = SEND_CREATE_CONNECTION; 5180 conn->role = HCI_ROLE_MASTER; 5181 } 5182 5183 conn->con_handle = HCI_CON_HANDLE_INVALID; 5184 conn->role = HCI_ROLE_INVALID; 5185 5186 log_info("conn state %u", conn->state); 5187 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5188 switch (conn->state) { 5189 // if connection active exists 5190 case OPEN: 5191 // and OPEN, emit connection complete command 5192 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5193 // packet not sent to controller 5194 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5195 case RECEIVED_DISCONNECTION_COMPLETE: 5196 // create connection triggered in disconnect complete event, let's do it now 5197 break; 5198 case SEND_CREATE_CONNECTION: 5199 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5200 break; 5201 default: 5202 // otherwise, just ignore as it is already in the open process 5203 // packet not sent to controller 5204 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5205 } 5206 conn->state = SENT_CREATE_CONNECTION; 5207 5208 // track outgoing connection 5209 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5210 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5211 break; 5212 5213 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5214 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5215 // setup_synchronous_connection? Voice setting at offset 22 5216 // TODO: compare to current setting if sco connection already active 5217 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5218 break; 5219 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5220 // accept_synchronous_connection? Voice setting at offset 18 5221 // TODO: compare to current setting if sco connection already active 5222 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5223 break; 5224 #endif 5225 #endif 5226 5227 #ifdef ENABLE_BLE 5228 #ifdef ENABLE_LE_CENTRAL 5229 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5230 // white list used? 5231 initiator_filter_policy = packet[7]; 5232 switch (initiator_filter_policy) { 5233 case 0: 5234 // whitelist not used 5235 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5236 break; 5237 case 1: 5238 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5239 break; 5240 default: 5241 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5242 break; 5243 } 5244 // track outgoing connection 5245 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5246 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5247 break; 5248 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5249 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5250 break; 5251 #endif 5252 #endif 5253 default: 5254 break; 5255 } 5256 5257 hci_stack->num_cmd_packets--; 5258 5259 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5260 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5261 if (err != 0){ 5262 return ERROR_CODE_HARDWARE_FAILURE; 5263 } 5264 return ERROR_CODE_SUCCESS; 5265 } 5266 5267 // disconnect because of security block 5268 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5269 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5270 if (!connection) return; 5271 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5272 } 5273 5274 5275 // Configure Secure Simple Pairing 5276 5277 #ifdef ENABLE_CLASSIC 5278 5279 // enable will enable SSP during init 5280 void gap_ssp_set_enable(int enable){ 5281 hci_stack->ssp_enable = enable; 5282 } 5283 5284 static int hci_local_ssp_activated(void){ 5285 return gap_ssp_supported() && hci_stack->ssp_enable; 5286 } 5287 5288 // if set, BTstack will respond to io capability request using authentication requirement 5289 void gap_ssp_set_io_capability(int io_capability){ 5290 hci_stack->ssp_io_capability = io_capability; 5291 } 5292 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5293 hci_stack->ssp_authentication_requirement = authentication_requirement; 5294 } 5295 5296 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5297 void gap_ssp_set_auto_accept(int auto_accept){ 5298 hci_stack->ssp_auto_accept = auto_accept; 5299 } 5300 5301 void gap_secure_connections_enable(bool enable){ 5302 hci_stack->secure_connections_enable = enable; 5303 } 5304 5305 #endif 5306 5307 // va_list part of hci_send_cmd 5308 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5309 if (!hci_can_send_command_packet_now()){ 5310 log_error("hci_send_cmd called but cannot send packet now"); 5311 return ERROR_CODE_COMMAND_DISALLOWED; 5312 } 5313 5314 // for HCI INITIALIZATION 5315 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5316 hci_stack->last_cmd_opcode = cmd->opcode; 5317 5318 hci_reserve_packet_buffer(); 5319 uint8_t * packet = hci_stack->hci_packet_buffer; 5320 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5321 uint8_t status = hci_send_cmd_packet(packet, size); 5322 5323 // release packet buffer on error or for synchronous transport implementations 5324 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5325 hci_release_packet_buffer(); 5326 hci_emit_transport_packet_sent(); 5327 } 5328 5329 return status; 5330 } 5331 5332 /** 5333 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5334 */ 5335 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5336 va_list argptr; 5337 va_start(argptr, cmd); 5338 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5339 va_end(argptr); 5340 return status; 5341 } 5342 5343 // Create various non-HCI events. 5344 // TODO: generalize, use table similar to hci_create_command 5345 5346 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5347 // dump packet 5348 if (dump) { 5349 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5350 } 5351 5352 // dispatch to all event handlers 5353 btstack_linked_list_iterator_t it; 5354 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5355 while (btstack_linked_list_iterator_has_next(&it)){ 5356 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5357 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5358 } 5359 } 5360 5361 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5362 if (!hci_stack->acl_packet_handler) return; 5363 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5364 } 5365 5366 #ifdef ENABLE_CLASSIC 5367 static void hci_notify_if_sco_can_send_now(void){ 5368 // notify SCO sender if waiting 5369 if (!hci_stack->sco_waiting_for_can_send_now) return; 5370 if (hci_can_send_sco_packet_now()){ 5371 hci_stack->sco_waiting_for_can_send_now = 0; 5372 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5373 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5374 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5375 } 5376 } 5377 5378 // parsing end emitting has been merged to reduce code size 5379 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5380 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5381 5382 uint8_t * eir_data; 5383 ad_context_t context; 5384 const uint8_t * name; 5385 uint8_t name_len; 5386 5387 if (size < 3) return; 5388 5389 int event_type = hci_event_packet_get_type(packet); 5390 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5391 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5392 5393 switch (event_type){ 5394 case HCI_EVENT_INQUIRY_RESULT: 5395 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5396 if (size != (3 + (num_responses * 14))) return; 5397 break; 5398 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5399 if (size != 257) return; 5400 if (num_responses != 1) return; 5401 break; 5402 default: 5403 return; 5404 } 5405 5406 // event[1] is set at the end 5407 int i; 5408 for (i=0; i<num_responses;i++){ 5409 memset(event, 0, sizeof(event)); 5410 event[0] = GAP_EVENT_INQUIRY_RESULT; 5411 uint8_t event_size = 27; // if name is not set by EIR 5412 5413 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5414 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5415 (void)memcpy(&event[9], 5416 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5417 3); // class of device 5418 (void)memcpy(&event[12], 5419 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5420 2); // clock offset 5421 5422 switch (event_type){ 5423 case HCI_EVENT_INQUIRY_RESULT: 5424 // 14,15,16,17 = 0, size 18 5425 break; 5426 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5427 event[14] = 1; 5428 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5429 // 16,17 = 0, size 18 5430 break; 5431 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5432 event[14] = 1; 5433 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5434 // EIR packets only contain a single inquiry response 5435 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5436 name = NULL; 5437 // Iterate over EIR data 5438 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5439 uint8_t data_type = ad_iterator_get_data_type(&context); 5440 uint8_t data_size = ad_iterator_get_data_len(&context); 5441 const uint8_t * data = ad_iterator_get_data(&context); 5442 // Prefer Complete Local Name over Shortened Local Name 5443 switch (data_type){ 5444 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5445 if (name) continue; 5446 /* fall through */ 5447 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5448 name = data; 5449 name_len = data_size; 5450 break; 5451 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5452 if (data_size != 8) break; 5453 event[16] = 1; 5454 memcpy(&event[17], data, 8); 5455 break; 5456 default: 5457 break; 5458 } 5459 } 5460 if (name){ 5461 event[25] = 1; 5462 // truncate name if needed 5463 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5464 event[26] = len; 5465 (void)memcpy(&event[27], name, len); 5466 event_size += len; 5467 } 5468 break; 5469 default: 5470 return; 5471 } 5472 event[1] = event_size - 2; 5473 hci_emit_event(event, event_size, 1); 5474 } 5475 } 5476 #endif 5477 5478 void hci_emit_state(void){ 5479 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5480 uint8_t event[3]; 5481 event[0] = BTSTACK_EVENT_STATE; 5482 event[1] = sizeof(event) - 2u; 5483 event[2] = hci_stack->state; 5484 hci_emit_event(event, sizeof(event), 1); 5485 } 5486 5487 #ifdef ENABLE_CLASSIC 5488 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5489 uint8_t event[13]; 5490 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5491 event[1] = sizeof(event) - 2; 5492 event[2] = status; 5493 little_endian_store_16(event, 3, con_handle); 5494 reverse_bd_addr(address, &event[5]); 5495 event[11] = 1; // ACL connection 5496 event[12] = 0; // encryption disabled 5497 hci_emit_event(event, sizeof(event), 1); 5498 } 5499 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5500 if (disable_l2cap_timeouts) return; 5501 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5502 uint8_t event[4]; 5503 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5504 event[1] = sizeof(event) - 2; 5505 little_endian_store_16(event, 2, conn->con_handle); 5506 hci_emit_event(event, sizeof(event), 1); 5507 } 5508 #endif 5509 5510 #ifdef ENABLE_BLE 5511 #ifdef ENABLE_LE_CENTRAL 5512 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){ 5513 uint8_t event[21]; 5514 event[0] = HCI_EVENT_LE_META; 5515 event[1] = sizeof(event) - 2u; 5516 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5517 event[3] = status; 5518 little_endian_store_16(event, 4, con_handle); 5519 event[6] = 0; // TODO: role 5520 event[7] = address_type; 5521 reverse_bd_addr(address, &event[8]); 5522 little_endian_store_16(event, 14, 0); // interval 5523 little_endian_store_16(event, 16, 0); // latency 5524 little_endian_store_16(event, 18, 0); // supervision timeout 5525 event[20] = 0; // master clock accuracy 5526 hci_emit_event(event, sizeof(event), 1); 5527 } 5528 #endif 5529 #endif 5530 5531 static void hci_emit_transport_packet_sent(void){ 5532 // notify upper stack that it might be possible to send again 5533 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5534 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5535 } 5536 5537 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5538 uint8_t event[6]; 5539 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5540 event[1] = sizeof(event) - 2u; 5541 event[2] = 0; // status = OK 5542 little_endian_store_16(event, 3, con_handle); 5543 event[5] = reason; 5544 hci_emit_event(event, sizeof(event), 1); 5545 } 5546 5547 static void hci_emit_nr_connections_changed(void){ 5548 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5549 uint8_t event[3]; 5550 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5551 event[1] = sizeof(event) - 2u; 5552 event[2] = nr_hci_connections(); 5553 hci_emit_event(event, sizeof(event), 1); 5554 } 5555 5556 static void hci_emit_hci_open_failed(void){ 5557 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5558 uint8_t event[2]; 5559 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5560 event[1] = sizeof(event) - 2u; 5561 hci_emit_event(event, sizeof(event), 1); 5562 } 5563 5564 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5565 log_info("hci_emit_dedicated_bonding_result %u ", status); 5566 uint8_t event[9]; 5567 int pos = 0; 5568 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5569 event[pos++] = sizeof(event) - 2u; 5570 event[pos++] = status; 5571 reverse_bd_addr(address, &event[pos]); 5572 hci_emit_event(event, sizeof(event), 1); 5573 } 5574 5575 5576 #ifdef ENABLE_CLASSIC 5577 5578 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5579 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5580 uint8_t event[5]; 5581 int pos = 0; 5582 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5583 event[pos++] = sizeof(event) - 2; 5584 little_endian_store_16(event, 2, con_handle); 5585 pos += 2; 5586 event[pos++] = level; 5587 hci_emit_event(event, sizeof(event), 1); 5588 } 5589 5590 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5591 if (!connection) return LEVEL_0; 5592 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5593 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5594 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5595 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5596 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5597 // LEVEL 4 always requires 128 bit encrytion key size 5598 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5599 security_level = LEVEL_3; 5600 } 5601 return security_level; 5602 } 5603 5604 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5605 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5606 uint8_t event[3]; 5607 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5608 event[1] = sizeof(event) - 2; 5609 event[2] = enabled; 5610 hci_emit_event(event, sizeof(event), 1); 5611 } 5612 5613 // query if remote side supports eSCO 5614 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5615 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5616 if (!connection) return false; 5617 return (connection->remote_supported_features[0] & 1) != 0; 5618 } 5619 5620 static bool hci_ssp_supported(hci_connection_t * connection){ 5621 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5622 return (connection->bonding_flags & mask) == mask; 5623 } 5624 5625 // query if remote side supports SSP 5626 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5627 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5628 if (!connection) return false; 5629 return hci_ssp_supported(connection) ? 1 : 0; 5630 } 5631 5632 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5633 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5634 } 5635 5636 /** 5637 * Check if remote supported features query has completed 5638 */ 5639 bool hci_remote_features_available(hci_con_handle_t handle){ 5640 hci_connection_t * connection = hci_connection_for_handle(handle); 5641 if (!connection) return false; 5642 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5643 } 5644 5645 /** 5646 * Trigger remote supported features query 5647 */ 5648 5649 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5650 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5651 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5652 } 5653 } 5654 5655 void hci_remote_features_query(hci_con_handle_t con_handle){ 5656 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5657 if (!connection) return; 5658 hci_trigger_remote_features_for_connection(connection); 5659 hci_run(); 5660 } 5661 5662 // GAP API 5663 /** 5664 * @bbrief enable/disable bonding. default is enabled 5665 * @praram enabled 5666 */ 5667 void gap_set_bondable_mode(int enable){ 5668 hci_stack->bondable = enable ? 1 : 0; 5669 } 5670 /** 5671 * @brief Get bondable mode. 5672 * @return 1 if bondable 5673 */ 5674 int gap_get_bondable_mode(void){ 5675 return hci_stack->bondable; 5676 } 5677 5678 /** 5679 * @brief map link keys to security levels 5680 */ 5681 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5682 switch (link_key_type){ 5683 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5684 return LEVEL_4; 5685 case COMBINATION_KEY: 5686 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5687 return LEVEL_3; 5688 default: 5689 return LEVEL_2; 5690 } 5691 } 5692 5693 /** 5694 * @brief map link keys to secure connection yes/no 5695 */ 5696 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5697 switch (link_key_type){ 5698 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5699 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5700 return 1; 5701 default: 5702 return 0; 5703 } 5704 } 5705 5706 /** 5707 * @brief map link keys to authenticated 5708 */ 5709 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5710 switch (link_key_type){ 5711 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5712 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5713 return 1; 5714 default: 5715 return 0; 5716 } 5717 } 5718 5719 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5720 log_info("gap_mitm_protection_required_for_security_level %u", level); 5721 return level > LEVEL_2; 5722 } 5723 5724 /** 5725 * @brief get current security level 5726 */ 5727 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5728 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5729 if (!connection) return LEVEL_0; 5730 return gap_security_level_for_connection(connection); 5731 } 5732 5733 /** 5734 * @brief request connection to device to 5735 * @result GAP_AUTHENTICATION_RESULT 5736 */ 5737 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5738 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5739 if (!connection){ 5740 hci_emit_security_level(con_handle, LEVEL_0); 5741 return; 5742 } 5743 5744 btstack_assert(hci_is_le_connection(connection) == false); 5745 5746 // 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) 5747 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5748 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5749 requested_level = LEVEL_4; 5750 } 5751 5752 gap_security_level_t current_level = gap_security_level(con_handle); 5753 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5754 requested_level, connection->requested_security_level, current_level); 5755 5756 // authentication active if authentication request was sent or planned level > 0 5757 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5758 if (authentication_active){ 5759 // authentication already active 5760 if (connection->requested_security_level < requested_level){ 5761 // increase requested level as new level is higher 5762 // TODO: handle re-authentication when done 5763 connection->requested_security_level = requested_level; 5764 } 5765 } else { 5766 // no request active, notify if security sufficient 5767 if (requested_level <= current_level){ 5768 hci_emit_security_level(con_handle, current_level); 5769 return; 5770 } 5771 5772 // store request 5773 connection->requested_security_level = requested_level; 5774 5775 // request remote features if not already active 5776 hci_remote_features_query(con_handle); 5777 5778 // start to authenticate connection 5779 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5780 hci_run(); 5781 } 5782 } 5783 5784 /** 5785 * @brief start dedicated bonding with device. disconnect after bonding 5786 * @param device 5787 * @param request MITM protection 5788 * @result GAP_DEDICATED_BONDING_COMPLETE 5789 */ 5790 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5791 5792 // create connection state machine 5793 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5794 5795 if (!connection){ 5796 return BTSTACK_MEMORY_ALLOC_FAILED; 5797 } 5798 5799 // delete linkn key 5800 gap_drop_link_key_for_bd_addr(device); 5801 5802 // configure LEVEL_2/3, dedicated bonding 5803 connection->state = SEND_CREATE_CONNECTION; 5804 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5805 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5806 connection->bonding_flags = BONDING_DEDICATED; 5807 5808 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5809 5810 // handle: connnection failure (connection complete != ok) 5811 // handle: authentication failure 5812 // handle: disconnect on done 5813 5814 hci_run(); 5815 5816 return 0; 5817 } 5818 5819 void gap_set_local_name(const char * local_name){ 5820 hci_stack->local_name = local_name; 5821 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5822 // also update EIR if not set by user 5823 if (hci_stack->eir_data == NULL){ 5824 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5825 } 5826 hci_run(); 5827 } 5828 #endif 5829 5830 5831 #ifdef ENABLE_BLE 5832 5833 #ifdef ENABLE_LE_CENTRAL 5834 void gap_start_scan(void){ 5835 hci_stack->le_scanning_enabled = true; 5836 hci_run(); 5837 } 5838 5839 void gap_stop_scan(void){ 5840 hci_stack->le_scanning_enabled = false; 5841 hci_run(); 5842 } 5843 5844 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5845 hci_stack->le_scan_type = scan_type; 5846 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5847 hci_stack->le_scan_interval = scan_interval; 5848 hci_stack->le_scan_window = scan_window; 5849 hci_stack->le_scanning_param_update = true; 5850 hci_run(); 5851 } 5852 5853 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5854 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5855 } 5856 5857 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5858 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5859 if (!conn){ 5860 // disallow if le connection is already outgoing 5861 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5862 log_error("le connection already active"); 5863 return ERROR_CODE_COMMAND_DISALLOWED; 5864 } 5865 5866 log_info("gap_connect: no connection exists yet, creating context"); 5867 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5868 if (!conn){ 5869 // notify client that alloc failed 5870 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5871 log_info("gap_connect: failed to alloc hci_connection_t"); 5872 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5873 } 5874 5875 // set le connecting state 5876 if (hci_is_le_connection_type(addr_type)){ 5877 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5878 } 5879 5880 conn->state = SEND_CREATE_CONNECTION; 5881 log_info("gap_connect: send create connection next"); 5882 hci_run(); 5883 return ERROR_CODE_SUCCESS; 5884 } 5885 5886 if (!hci_is_le_connection(conn) || 5887 (conn->state == SEND_CREATE_CONNECTION) || 5888 (conn->state == SENT_CREATE_CONNECTION)) { 5889 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5890 log_error("gap_connect: classic connection or connect is already being created"); 5891 return GATT_CLIENT_IN_WRONG_STATE; 5892 } 5893 5894 // check if connection was just disconnected 5895 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5896 log_info("gap_connect: send create connection (again)"); 5897 conn->state = SEND_CREATE_CONNECTION; 5898 hci_run(); 5899 return ERROR_CODE_SUCCESS; 5900 } 5901 5902 log_info("gap_connect: context exists with state %u", conn->state); 5903 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5904 hci_run(); 5905 return ERROR_CODE_SUCCESS; 5906 } 5907 5908 // @assumption: only a single outgoing LE Connection exists 5909 static hci_connection_t * gap_get_outgoing_connection(void){ 5910 btstack_linked_item_t *it; 5911 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5912 hci_connection_t * conn = (hci_connection_t *) it; 5913 if (!hci_is_le_connection(conn)) continue; 5914 switch (conn->state){ 5915 case SEND_CREATE_CONNECTION: 5916 case SENT_CREATE_CONNECTION: 5917 case SENT_CANCEL_CONNECTION: 5918 return conn; 5919 default: 5920 break; 5921 }; 5922 } 5923 return NULL; 5924 } 5925 5926 uint8_t gap_connect_cancel(void){ 5927 hci_connection_t * conn = gap_get_outgoing_connection(); 5928 if (!conn) return 0; 5929 switch (conn->state){ 5930 case SEND_CREATE_CONNECTION: 5931 // skip sending create connection and emit event instead 5932 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5933 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5934 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5935 btstack_memory_hci_connection_free( conn ); 5936 break; 5937 case SENT_CREATE_CONNECTION: 5938 // request to send cancel connection 5939 conn->state = SEND_CANCEL_CONNECTION; 5940 hci_run(); 5941 break; 5942 default: 5943 break; 5944 } 5945 return 0; 5946 } 5947 #endif 5948 5949 #ifdef ENABLE_LE_CENTRAL 5950 /** 5951 * @brief Set connection parameters for outgoing connections 5952 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5953 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5954 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5955 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5956 * @param conn_latency, default: 4 5957 * @param supervision_timeout (unit: 10ms), default: 720 ms 5958 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5959 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5960 */ 5961 5962 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5963 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5964 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5965 hci_stack->le_connection_scan_interval = conn_scan_interval; 5966 hci_stack->le_connection_scan_window = conn_scan_window; 5967 hci_stack->le_connection_interval_min = conn_interval_min; 5968 hci_stack->le_connection_interval_max = conn_interval_max; 5969 hci_stack->le_connection_latency = conn_latency; 5970 hci_stack->le_supervision_timeout = supervision_timeout; 5971 hci_stack->le_minimum_ce_length = min_ce_length; 5972 hci_stack->le_maximum_ce_length = max_ce_length; 5973 } 5974 #endif 5975 5976 /** 5977 * @brief Updates the connection parameters for a given LE connection 5978 * @param handle 5979 * @param conn_interval_min (unit: 1.25ms) 5980 * @param conn_interval_max (unit: 1.25ms) 5981 * @param conn_latency 5982 * @param supervision_timeout (unit: 10ms) 5983 * @return 0 if ok 5984 */ 5985 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5986 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5987 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5988 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5989 connection->le_conn_interval_min = conn_interval_min; 5990 connection->le_conn_interval_max = conn_interval_max; 5991 connection->le_conn_latency = conn_latency; 5992 connection->le_supervision_timeout = supervision_timeout; 5993 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5994 hci_run(); 5995 return 0; 5996 } 5997 5998 /** 5999 * @brief Request an update of the connection parameter for a given LE connection 6000 * @param handle 6001 * @param conn_interval_min (unit: 1.25ms) 6002 * @param conn_interval_max (unit: 1.25ms) 6003 * @param conn_latency 6004 * @param supervision_timeout (unit: 10ms) 6005 * @return 0 if ok 6006 */ 6007 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6008 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6009 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6010 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6011 connection->le_conn_interval_min = conn_interval_min; 6012 connection->le_conn_interval_max = conn_interval_max; 6013 connection->le_conn_latency = conn_latency; 6014 connection->le_supervision_timeout = supervision_timeout; 6015 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6016 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6017 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6018 return 0; 6019 } 6020 6021 #ifdef ENABLE_LE_PERIPHERAL 6022 6023 /** 6024 * @brief Set Advertisement Data 6025 * @param advertising_data_length 6026 * @param advertising_data (max 31 octets) 6027 * @note data is not copied, pointer has to stay valid 6028 */ 6029 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6030 hci_stack->le_advertisements_data_len = advertising_data_length; 6031 hci_stack->le_advertisements_data = advertising_data; 6032 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6033 hci_run(); 6034 } 6035 6036 /** 6037 * @brief Set Scan Response Data 6038 * @param advertising_data_length 6039 * @param advertising_data (max 31 octets) 6040 * @note data is not copied, pointer has to stay valid 6041 */ 6042 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6043 hci_stack->le_scan_response_data_len = scan_response_data_length; 6044 hci_stack->le_scan_response_data = scan_response_data; 6045 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6046 hci_run(); 6047 } 6048 6049 /** 6050 * @brief Set Advertisement Parameters 6051 * @param adv_int_min 6052 * @param adv_int_max 6053 * @param adv_type 6054 * @param direct_address_type 6055 * @param direct_address 6056 * @param channel_map 6057 * @param filter_policy 6058 * 6059 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6060 */ 6061 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6062 uint8_t direct_address_typ, bd_addr_t direct_address, 6063 uint8_t channel_map, uint8_t filter_policy) { 6064 6065 hci_stack->le_advertisements_interval_min = adv_int_min; 6066 hci_stack->le_advertisements_interval_max = adv_int_max; 6067 hci_stack->le_advertisements_type = adv_type; 6068 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6069 hci_stack->le_advertisements_channel_map = channel_map; 6070 hci_stack->le_advertisements_filter_policy = filter_policy; 6071 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6072 6); 6073 6074 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6075 hci_run(); 6076 } 6077 6078 /** 6079 * @brief Enable/Disable Advertisements 6080 * @param enabled 6081 */ 6082 void gap_advertisements_enable(int enabled){ 6083 hci_stack->le_advertisements_enabled = enabled != 0; 6084 hci_update_advertisements_enabled_for_current_roles(); 6085 hci_run(); 6086 } 6087 6088 #endif 6089 6090 void hci_le_set_own_address_type(uint8_t own_address_type){ 6091 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6092 if (own_address_type == hci_stack->le_own_addr_type) return; 6093 hci_stack->le_own_addr_type = own_address_type; 6094 6095 #ifdef ENABLE_LE_PERIPHERAL 6096 // update advertisement parameters, too 6097 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6098 hci_run(); 6099 #endif 6100 #ifdef ENABLE_LE_CENTRAL 6101 // note: we don't update scan parameters or modify ongoing connection attempts 6102 #endif 6103 } 6104 6105 void hci_le_random_address_set(const bd_addr_t random_address){ 6106 memcpy(hci_stack->le_random_address, random_address, 6); 6107 hci_stack->le_random_address_set = true; 6108 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6109 hci_run(); 6110 } 6111 6112 #endif 6113 6114 uint8_t gap_disconnect(hci_con_handle_t handle){ 6115 hci_connection_t * conn = hci_connection_for_handle(handle); 6116 if (!conn){ 6117 hci_emit_disconnection_complete(handle, 0); 6118 return 0; 6119 } 6120 // ignore if already disconnected 6121 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6122 return 0; 6123 } 6124 conn->state = SEND_DISCONNECT; 6125 hci_run(); 6126 return 0; 6127 } 6128 6129 int gap_read_rssi(hci_con_handle_t con_handle){ 6130 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6131 if (hci_connection == NULL) return 0; 6132 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6133 hci_run(); 6134 return 1; 6135 } 6136 6137 /** 6138 * @brief Get connection type 6139 * @param con_handle 6140 * @result connection_type 6141 */ 6142 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6143 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6144 if (!conn) return GAP_CONNECTION_INVALID; 6145 switch (conn->address_type){ 6146 case BD_ADDR_TYPE_LE_PUBLIC: 6147 case BD_ADDR_TYPE_LE_RANDOM: 6148 return GAP_CONNECTION_LE; 6149 case BD_ADDR_TYPE_SCO: 6150 return GAP_CONNECTION_SCO; 6151 case BD_ADDR_TYPE_ACL: 6152 return GAP_CONNECTION_ACL; 6153 default: 6154 return GAP_CONNECTION_INVALID; 6155 } 6156 } 6157 6158 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6159 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6160 if (!conn) return HCI_ROLE_INVALID; 6161 return (hci_role_t) conn->role; 6162 } 6163 6164 6165 #ifdef ENABLE_CLASSIC 6166 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6167 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6168 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6169 conn->request_role = role; 6170 hci_run(); 6171 return ERROR_CODE_SUCCESS; 6172 } 6173 #endif 6174 6175 #ifdef ENABLE_BLE 6176 6177 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){ 6178 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6179 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6180 6181 conn->le_phy_update_all_phys = all_phys; 6182 conn->le_phy_update_tx_phys = tx_phys; 6183 conn->le_phy_update_rx_phys = rx_phys; 6184 conn->le_phy_update_phy_options = phy_options; 6185 6186 hci_run(); 6187 6188 return 0; 6189 } 6190 6191 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6192 // check if already in list 6193 btstack_linked_list_iterator_t it; 6194 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6195 while (btstack_linked_list_iterator_has_next(&it)) { 6196 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6197 if (entry->address_type != address_type) { 6198 continue; 6199 } 6200 if (memcmp(entry->address, address, 6) != 0) { 6201 continue; 6202 } 6203 // disallow if already scheduled to add 6204 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6205 return ERROR_CODE_COMMAND_DISALLOWED; 6206 } 6207 // still on controller, but scheduled to remove -> re-add 6208 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6209 return ERROR_CODE_SUCCESS; 6210 } 6211 // alloc and add to list 6212 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6213 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6214 entry->address_type = address_type; 6215 (void)memcpy(entry->address, address, 6); 6216 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6217 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6218 return ERROR_CODE_SUCCESS; 6219 } 6220 6221 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6222 btstack_linked_list_iterator_t it; 6223 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6224 while (btstack_linked_list_iterator_has_next(&it)){ 6225 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6226 if (entry->address_type != address_type) { 6227 continue; 6228 } 6229 if (memcmp(entry->address, address, 6) != 0) { 6230 continue; 6231 } 6232 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6233 // remove from controller if already present 6234 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6235 } else { 6236 // directly remove entry from whitelist 6237 btstack_linked_list_iterator_remove(&it); 6238 btstack_memory_whitelist_entry_free(entry); 6239 } 6240 return ERROR_CODE_SUCCESS; 6241 } 6242 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6243 } 6244 6245 static void hci_whitelist_clear(void){ 6246 btstack_linked_list_iterator_t it; 6247 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6248 while (btstack_linked_list_iterator_has_next(&it)){ 6249 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6250 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6251 // remove from controller if already present 6252 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6253 continue; 6254 } 6255 // directly remove entry from whitelist 6256 btstack_linked_list_iterator_remove(&it); 6257 btstack_memory_whitelist_entry_free(entry); 6258 } 6259 } 6260 6261 // free all entries unconditionally 6262 static void hci_whitelist_free(void){ 6263 btstack_linked_list_iterator_t lit; 6264 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6265 while (btstack_linked_list_iterator_has_next(&lit)){ 6266 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6267 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6268 btstack_memory_whitelist_entry_free(entry); 6269 } 6270 } 6271 6272 /** 6273 * @brief Clear Whitelist 6274 * @return 0 if ok 6275 */ 6276 uint8_t gap_whitelist_clear(void){ 6277 hci_whitelist_clear(); 6278 hci_run(); 6279 return ERROR_CODE_SUCCESS; 6280 } 6281 6282 /** 6283 * @brief Add Device to Whitelist 6284 * @param address_typ 6285 * @param address 6286 * @return 0 if ok 6287 */ 6288 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6289 uint8_t status = hci_whitelist_add(address_type, address); 6290 if (status){ 6291 return status; 6292 } 6293 hci_run(); 6294 return ERROR_CODE_SUCCESS; 6295 } 6296 6297 /** 6298 * @brief Remove Device from Whitelist 6299 * @param address_typ 6300 * @param address 6301 * @return 0 if ok 6302 */ 6303 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6304 uint8_t status = hci_whitelist_remove(address_type, address); 6305 if (status){ 6306 return status; 6307 } 6308 hci_run(); 6309 return ERROR_CODE_SUCCESS; 6310 } 6311 6312 #ifdef ENABLE_LE_CENTRAL 6313 /** 6314 * @brief Connect with Whitelist 6315 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6316 * @return - if ok 6317 */ 6318 uint8_t gap_connect_with_whitelist(void){ 6319 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6320 return ERROR_CODE_COMMAND_DISALLOWED; 6321 } 6322 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6323 hci_run(); 6324 return ERROR_CODE_SUCCESS; 6325 } 6326 6327 /** 6328 * @brief Auto Connection Establishment - Start Connecting to device 6329 * @param address_typ 6330 * @param address 6331 * @return 0 if ok 6332 */ 6333 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6334 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6335 return ERROR_CODE_COMMAND_DISALLOWED; 6336 } 6337 6338 uint8_t status = hci_whitelist_add(address_type, address); 6339 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6340 return status; 6341 } 6342 6343 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6344 6345 hci_run(); 6346 return ERROR_CODE_SUCCESS; 6347 } 6348 6349 /** 6350 * @brief Auto Connection Establishment - Stop Connecting to device 6351 * @param address_typ 6352 * @param address 6353 * @return 0 if ok 6354 */ 6355 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6356 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6357 return ERROR_CODE_COMMAND_DISALLOWED; 6358 } 6359 6360 hci_whitelist_remove(address_type, address); 6361 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6362 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6363 } 6364 hci_run(); 6365 return 0; 6366 } 6367 6368 /** 6369 * @brief Auto Connection Establishment - Stop everything 6370 * @note Convenience function to stop all active auto connection attempts 6371 */ 6372 uint8_t gap_auto_connection_stop_all(void){ 6373 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6374 return ERROR_CODE_COMMAND_DISALLOWED; 6375 } 6376 hci_whitelist_clear(); 6377 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6378 hci_run(); 6379 return ERROR_CODE_SUCCESS; 6380 } 6381 6382 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6383 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6384 if (!conn) return 0; 6385 return conn->le_connection_interval; 6386 } 6387 #endif 6388 #endif 6389 6390 #ifdef ENABLE_CLASSIC 6391 /** 6392 * @brief Set Extended Inquiry Response data 6393 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6394 * @note has to be done before stack starts up 6395 */ 6396 void gap_set_extended_inquiry_response(const uint8_t * data){ 6397 hci_stack->eir_data = data; 6398 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6399 hci_run(); 6400 } 6401 6402 /** 6403 * @brief Start GAP Classic Inquiry 6404 * @param duration in 1.28s units 6405 * @return 0 if ok 6406 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6407 */ 6408 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6409 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6410 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6411 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6412 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6413 } 6414 hci_stack->inquiry_state = duration_in_1280ms_units; 6415 hci_run(); 6416 return 0; 6417 } 6418 6419 /** 6420 * @brief Stop GAP Classic Inquiry 6421 * @return 0 if ok 6422 */ 6423 int gap_inquiry_stop(void){ 6424 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6425 // emit inquiry complete event, before it even started 6426 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6427 hci_emit_event(event, sizeof(event), 1); 6428 return 0; 6429 } 6430 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6431 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6432 hci_run(); 6433 return 0; 6434 } 6435 6436 void gap_inquiry_set_lap(uint32_t lap){ 6437 hci_stack->inquiry_lap = lap; 6438 } 6439 6440 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6441 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6442 hci_stack->inquiry_scan_window = inquiry_scan_window; 6443 hci_stack->gap_tasks |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6444 hci_run(); 6445 } 6446 6447 6448 /** 6449 * @brief Remote Name Request 6450 * @param addr 6451 * @param page_scan_repetition_mode 6452 * @param clock_offset only used when bit 15 is set 6453 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6454 */ 6455 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6456 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6457 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6458 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6459 hci_stack->remote_name_clock_offset = clock_offset; 6460 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6461 hci_run(); 6462 return 0; 6463 } 6464 6465 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6466 hci_stack->gap_pairing_state = state; 6467 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6468 hci_run(); 6469 return 0; 6470 } 6471 6472 /** 6473 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6474 * @param addr 6475 * @param pin_data 6476 * @param pin_len 6477 * @return 0 if ok 6478 */ 6479 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6480 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6481 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6482 hci_stack->gap_pairing_pin_len = pin_len; 6483 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6484 } 6485 6486 /** 6487 * @brief Legacy Pairing Pin Code Response 6488 * @param addr 6489 * @param pin 6490 * @return 0 if ok 6491 */ 6492 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6493 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6494 } 6495 6496 /** 6497 * @brief Abort Legacy Pairing 6498 * @param addr 6499 * @param pin 6500 * @return 0 if ok 6501 */ 6502 int gap_pin_code_negative(bd_addr_t addr){ 6503 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6504 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6505 } 6506 6507 /** 6508 * @brief SSP Passkey Response 6509 * @param addr 6510 * @param passkey 6511 * @return 0 if ok 6512 */ 6513 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6514 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6515 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6516 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6517 } 6518 6519 /** 6520 * @brief Abort SSP Passkey Entry/Pairing 6521 * @param addr 6522 * @param pin 6523 * @return 0 if ok 6524 */ 6525 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6526 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6527 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6528 } 6529 6530 /** 6531 * @brief Accept SSP Numeric Comparison 6532 * @param addr 6533 * @param passkey 6534 * @return 0 if ok 6535 */ 6536 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6537 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6538 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6539 } 6540 6541 /** 6542 * @brief Abort SSP Numeric Comparison/Pairing 6543 * @param addr 6544 * @param pin 6545 * @return 0 if ok 6546 */ 6547 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6548 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6549 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6550 } 6551 6552 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6553 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6554 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6555 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6556 connectionSetAuthenticationFlags(conn, flag); 6557 hci_run(); 6558 return ERROR_CODE_SUCCESS; 6559 } 6560 #endif 6561 6562 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6563 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6564 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6565 } 6566 6567 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6568 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6569 } 6570 #endif 6571 6572 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6573 /** 6574 * @brief Report Remote OOB Data 6575 * @param bd_addr 6576 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6577 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6578 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6579 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6580 */ 6581 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){ 6582 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6583 if (connection == NULL) { 6584 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6585 } 6586 connection->classic_oob_c_192 = c_192; 6587 connection->classic_oob_r_192 = r_192; 6588 6589 // ignore P-256 if not supported by us 6590 if (hci_stack->secure_connections_active){ 6591 connection->classic_oob_c_256 = c_256; 6592 connection->classic_oob_r_256 = r_256; 6593 } 6594 6595 return ERROR_CODE_SUCCESS; 6596 } 6597 /** 6598 * @brief Generate new OOB data 6599 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6600 */ 6601 void gap_ssp_generate_oob_data(void){ 6602 hci_stack->classic_read_local_oob_data = true; 6603 hci_run(); 6604 } 6605 6606 #endif 6607 6608 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6609 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6610 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6611 if (connection == NULL) { 6612 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6613 } 6614 6615 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6616 connection->link_key_type = type; 6617 6618 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6619 } 6620 6621 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6622 /** 6623 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6624 * @param inquiry_mode see bluetooth_defines.h 6625 */ 6626 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6627 hci_stack->inquiry_mode = inquiry_mode; 6628 } 6629 6630 /** 6631 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6632 */ 6633 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6634 hci_stack->sco_voice_setting = voice_setting; 6635 } 6636 6637 /** 6638 * @brief Get SCO Voice Setting 6639 * @return current voice setting 6640 */ 6641 uint16_t hci_get_sco_voice_setting(void){ 6642 return hci_stack->sco_voice_setting; 6643 } 6644 6645 static int hci_have_usb_transport(void){ 6646 if (!hci_stack->hci_transport) return 0; 6647 const char * transport_name = hci_stack->hci_transport->name; 6648 if (!transport_name) return 0; 6649 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6650 } 6651 6652 /** @brief Get SCO packet length for current SCO Voice setting 6653 * @note Using SCO packets of the exact length is required for USB transfer 6654 * @return Length of SCO packets in bytes (not audio frames) 6655 */ 6656 uint16_t hci_get_sco_packet_length(void){ 6657 uint16_t sco_packet_length = 0; 6658 6659 #ifdef ENABLE_SCO_OVER_HCI 6660 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6661 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6662 6663 if (hci_have_usb_transport()){ 6664 // see Core Spec for H2 USB Transfer. 6665 // 3 byte SCO header + 24 bytes per connection 6666 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6667 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6668 } else { 6669 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6670 sco_packet_length = 3 + 60 * multiplier; 6671 // assert that it still fits inside an SCO buffer 6672 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6673 sco_packet_length = 3 + 60; 6674 } 6675 } 6676 #endif 6677 6678 #ifdef HAVE_SCO_TRANSPORT 6679 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6680 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6681 sco_packet_length = 3 + 60 * multiplier; 6682 #endif 6683 return sco_packet_length; 6684 } 6685 6686 /** 6687 * @brief Sets the master/slave policy 6688 * @param policy (0: attempt to become master, 1: let connecting device decide) 6689 */ 6690 void hci_set_master_slave_policy(uint8_t policy){ 6691 hci_stack->master_slave_policy = policy; 6692 } 6693 6694 #endif 6695 6696 HCI_STATE hci_get_state(void){ 6697 return hci_stack->state; 6698 } 6699 6700 #ifdef ENABLE_CLASSIC 6701 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6702 hci_stack->gap_classic_accept_callback = accept_callback; 6703 } 6704 #endif 6705 6706 /** 6707 * @brief Set callback for Bluetooth Hardware Error 6708 */ 6709 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6710 hci_stack->hardware_error_callback = fn; 6711 } 6712 6713 void hci_disconnect_all(void){ 6714 btstack_linked_list_iterator_t it; 6715 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6716 while (btstack_linked_list_iterator_has_next(&it)){ 6717 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6718 if (con->state == SENT_DISCONNECT) continue; 6719 con->state = SEND_DISCONNECT; 6720 } 6721 hci_run(); 6722 } 6723 6724 uint16_t hci_get_manufacturer(void){ 6725 return hci_stack->manufacturer; 6726 } 6727 6728 #ifdef ENABLE_BLE 6729 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6730 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6731 if (!hci_con) return NULL; 6732 return &hci_con->sm_connection; 6733 } 6734 6735 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6736 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6737 #endif 6738 6739 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6740 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6741 if (hci_connection == NULL) return 0; 6742 if (hci_is_le_connection(hci_connection)){ 6743 #ifdef ENABLE_BLE 6744 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6745 if (sm_conn->sm_connection_encrypted) { 6746 return sm_conn->sm_actual_encryption_key_size; 6747 } 6748 #endif 6749 } else { 6750 #ifdef ENABLE_CLASSIC 6751 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6752 return hci_connection->encryption_key_size; 6753 } 6754 #endif 6755 } 6756 return 0; 6757 } 6758 6759 int gap_authenticated(hci_con_handle_t con_handle){ 6760 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6761 if (hci_connection == NULL) return 0; 6762 6763 switch (hci_connection->address_type){ 6764 #ifdef ENABLE_BLE 6765 case BD_ADDR_TYPE_LE_PUBLIC: 6766 case BD_ADDR_TYPE_LE_RANDOM: 6767 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6768 return hci_connection->sm_connection.sm_connection_authenticated; 6769 #endif 6770 #ifdef ENABLE_CLASSIC 6771 case BD_ADDR_TYPE_SCO: 6772 case BD_ADDR_TYPE_ACL: 6773 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6774 #endif 6775 default: 6776 return 0; 6777 } 6778 } 6779 6780 int gap_secure_connection(hci_con_handle_t con_handle){ 6781 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6782 if (hci_connection == NULL) return 0; 6783 6784 switch (hci_connection->address_type){ 6785 #ifdef ENABLE_BLE 6786 case BD_ADDR_TYPE_LE_PUBLIC: 6787 case BD_ADDR_TYPE_LE_RANDOM: 6788 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6789 return hci_connection->sm_connection.sm_connection_sc; 6790 #endif 6791 #ifdef ENABLE_CLASSIC 6792 case BD_ADDR_TYPE_SCO: 6793 case BD_ADDR_TYPE_ACL: 6794 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6795 #endif 6796 default: 6797 return 0; 6798 } 6799 } 6800 6801 bool gap_bonded(hci_con_handle_t con_handle){ 6802 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6803 if (hci_connection == NULL) return 0; 6804 6805 #ifdef ENABLE_CLASSIC 6806 link_key_t link_key; 6807 link_key_type_t link_key_type; 6808 #endif 6809 switch (hci_connection->address_type){ 6810 #ifdef ENABLE_BLE 6811 case BD_ADDR_TYPE_LE_PUBLIC: 6812 case BD_ADDR_TYPE_LE_RANDOM: 6813 return hci_connection->sm_connection.sm_le_db_index >= 0; 6814 #endif 6815 #ifdef ENABLE_CLASSIC 6816 case BD_ADDR_TYPE_SCO: 6817 case BD_ADDR_TYPE_ACL: 6818 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6819 #endif 6820 default: 6821 return false; 6822 } 6823 } 6824 6825 #ifdef ENABLE_BLE 6826 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6827 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6828 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6829 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6830 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6831 return sm_conn->sm_connection_authorization_state; 6832 } 6833 #endif 6834 6835 #ifdef ENABLE_CLASSIC 6836 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){ 6837 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6838 if (!conn) return GAP_CONNECTION_INVALID; 6839 conn->sniff_min_interval = sniff_min_interval; 6840 conn->sniff_max_interval = sniff_max_interval; 6841 conn->sniff_attempt = sniff_attempt; 6842 conn->sniff_timeout = sniff_timeout; 6843 hci_run(); 6844 return 0; 6845 } 6846 6847 /** 6848 * @brief Exit Sniff mode 6849 * @param con_handle 6850 @ @return 0 if ok 6851 */ 6852 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6853 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6854 if (!conn) return GAP_CONNECTION_INVALID; 6855 conn->sniff_min_interval = 0xffff; 6856 hci_run(); 6857 return 0; 6858 } 6859 6860 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){ 6861 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6862 if (!conn) return GAP_CONNECTION_INVALID; 6863 conn->sniff_subrating_max_latency = max_latency; 6864 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6865 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6866 hci_run(); 6867 return ERROR_CODE_SUCCESS; 6868 } 6869 6870 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){ 6871 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6872 if (!conn) return GAP_CONNECTION_INVALID; 6873 conn->qos_service_type = service_type; 6874 conn->qos_token_rate = token_rate; 6875 conn->qos_peak_bandwidth = peak_bandwidth; 6876 conn->qos_latency = latency; 6877 conn->qos_delay_variation = delay_variation; 6878 hci_run(); 6879 return ERROR_CODE_SUCCESS; 6880 } 6881 6882 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6883 hci_stack->new_page_scan_interval = page_scan_interval; 6884 hci_stack->new_page_scan_window = page_scan_window; 6885 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6886 hci_run(); 6887 } 6888 6889 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6890 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6891 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6892 hci_run(); 6893 } 6894 6895 void gap_set_page_timeout(uint16_t page_timeout){ 6896 hci_stack->page_timeout = page_timeout; 6897 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_TIMEOUT; 6898 hci_run(); 6899 } 6900 6901 #endif 6902 6903 void hci_halting_defer(void){ 6904 if (hci_stack->state != HCI_STATE_HALTING) return; 6905 switch (hci_stack->substate){ 6906 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6907 case HCI_HALTING_CLOSE: 6908 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6909 break; 6910 default: 6911 break; 6912 } 6913 } 6914 6915 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6916 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6917 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6918 if (le_device_db_index >= le_device_db_max_count()) return; 6919 uint8_t offset = le_device_db_index >> 3; 6920 uint8_t mask = 1 << (le_device_db_index & 7); 6921 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6922 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6923 // note: go back to remove entries, otherwise, a remove + add will skip the add 6924 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6925 } 6926 } 6927 6928 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6929 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6930 if (le_device_db_index >= le_device_db_max_count()) return; 6931 uint8_t offset = le_device_db_index >> 3; 6932 uint8_t mask = 1 << (le_device_db_index & 7); 6933 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6934 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6935 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6936 } 6937 } 6938 6939 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6940 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6941 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6942 } 6943 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6944 // restart le resolving list update 6945 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6946 } 6947 return ERROR_CODE_SUCCESS; 6948 } 6949 #endif 6950 6951 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6952 void hci_setup_test_connections_fuzz(void){ 6953 hci_connection_t * conn; 6954 6955 // default address: 66:55:44:33:00:01 6956 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6957 6958 // setup Controller info 6959 hci_stack->num_cmd_packets = 255; 6960 hci_stack->acl_packets_total_num = 255; 6961 6962 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6963 addr[5] = 0x01; 6964 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6965 conn->con_handle = addr[5]; 6966 conn->role = HCI_ROLE_SLAVE; 6967 conn->state = RECEIVED_CONNECTION_REQUEST; 6968 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6969 6970 // setup incoming Classic SCO connection with con handle 0x0002 6971 addr[5] = 0x02; 6972 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6973 conn->con_handle = addr[5]; 6974 conn->role = HCI_ROLE_SLAVE; 6975 conn->state = RECEIVED_CONNECTION_REQUEST; 6976 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6977 6978 // setup ready Classic ACL connection with con handle 0x0003 6979 addr[5] = 0x03; 6980 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6981 conn->con_handle = addr[5]; 6982 conn->role = HCI_ROLE_SLAVE; 6983 conn->state = OPEN; 6984 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6985 6986 // setup ready Classic SCO connection with con handle 0x0004 6987 addr[5] = 0x04; 6988 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6989 conn->con_handle = addr[5]; 6990 conn->role = HCI_ROLE_SLAVE; 6991 conn->state = OPEN; 6992 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6993 6994 // setup ready LE ACL connection with con handle 0x005 and public address 6995 addr[5] = 0x05; 6996 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6997 conn->con_handle = addr[5]; 6998 conn->role = HCI_ROLE_SLAVE; 6999 conn->state = OPEN; 7000 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7001 conn->sm_connection.sm_connection_encrypted = 1; 7002 } 7003 7004 void hci_free_connections_fuzz(void){ 7005 btstack_linked_list_iterator_t it; 7006 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7007 while (btstack_linked_list_iterator_has_next(&it)){ 7008 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7009 btstack_linked_list_iterator_remove(&it); 7010 btstack_memory_hci_connection_free(con); 7011 } 7012 } 7013 void hci_simulate_working_fuzz(void){ 7014 hci_init_done(); 7015 hci_stack->num_cmd_packets = 255; 7016 } 7017 #endif 7018