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