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