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 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 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){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 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); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 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){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 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); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 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); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 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); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // 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); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 static void hci_init_done(void){ 1427 // done. tell the app 1428 log_info("hci_init_done -> HCI_STATE_WORKING"); 1429 hci_stack->state = HCI_STATE_WORKING; 1430 hci_emit_state(); 1431 } 1432 1433 // assumption: hci_can_send_command_packet_now() == true 1434 static void hci_initializing_run(void){ 1435 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1436 1437 #ifndef HAVE_HOST_CONTROLLER_API 1438 bool need_baud_change = hci_stack->config 1439 && hci_stack->chipset 1440 && hci_stack->chipset->set_baudrate_command 1441 && hci_stack->hci_transport->set_baudrate 1442 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1443 #endif 1444 1445 switch (hci_stack->substate){ 1446 case HCI_INIT_SEND_RESET: 1447 hci_state_reset(); 1448 1449 #ifndef HAVE_HOST_CONTROLLER_API 1450 // prepare reset if command complete not received in 100ms 1451 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1452 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1453 btstack_run_loop_add_timer(&hci_stack->timeout); 1454 #endif 1455 // send command 1456 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1457 hci_send_cmd(&hci_reset); 1458 break; 1459 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1460 hci_send_cmd(&hci_read_local_version_information); 1461 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1462 break; 1463 1464 #ifndef HAVE_HOST_CONTROLLER_API 1465 case HCI_INIT_SEND_READ_LOCAL_NAME: 1466 hci_send_cmd(&hci_read_local_name); 1467 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1468 break; 1469 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1470 hci_state_reset(); 1471 // prepare reset if command complete not received in 100ms 1472 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1473 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1474 btstack_run_loop_add_timer(&hci_stack->timeout); 1475 // send command 1476 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1477 hci_send_cmd(&hci_reset); 1478 break; 1479 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1480 hci_state_reset(); 1481 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1482 hci_send_cmd(&hci_reset); 1483 break; 1484 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1485 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1486 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1487 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1488 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1489 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1490 break; 1491 } 1492 case HCI_INIT_SET_BD_ADDR: 1493 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1494 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1495 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1496 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1497 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1498 break; 1499 case HCI_INIT_SEND_BAUD_CHANGE: 1500 if (need_baud_change) { 1501 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1502 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1503 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1504 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1505 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1506 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1507 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1508 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1509 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1510 btstack_run_loop_add_timer(&hci_stack->timeout); 1511 } 1512 break; 1513 } 1514 1515 /* fall through */ 1516 1517 case HCI_INIT_CUSTOM_INIT: 1518 // Custom initialization 1519 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1520 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1521 bool send_cmd = false; 1522 switch (hci_stack->chipset_result){ 1523 case BTSTACK_CHIPSET_VALID_COMMAND: 1524 send_cmd = true; 1525 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1526 break; 1527 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1528 send_cmd = true; 1529 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1530 log_info("CSR Warm Boot"); 1531 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1532 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1533 btstack_run_loop_add_timer(&hci_stack->timeout); 1534 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1535 && hci_stack->config 1536 && hci_stack->chipset 1537 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1538 && hci_stack->hci_transport->set_baudrate 1539 && hci_transport_uart_get_main_baud_rate()){ 1540 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1541 } else { 1542 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1543 } 1544 break; 1545 default: 1546 break; 1547 } 1548 1549 if (send_cmd){ 1550 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1551 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1552 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1553 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1554 break; 1555 } 1556 log_info("Init script done"); 1557 1558 // Init script download on Broadcom chipsets causes: 1559 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1560 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1561 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1562 1563 // - baud rate to reset, restore UART baud rate if needed 1564 if (need_baud_change) { 1565 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1566 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1567 hci_stack->hci_transport->set_baudrate(baud_rate); 1568 } 1569 1570 uint16_t bcm_delay_ms = 300; 1571 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1572 // -> Work around: wait here. 1573 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1574 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1575 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1576 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1577 btstack_run_loop_add_timer(&hci_stack->timeout); 1578 break; 1579 } 1580 } 1581 /* fall through */ 1582 #endif 1583 1584 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1585 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1586 hci_send_cmd(&hci_read_local_supported_commands); 1587 break; 1588 case HCI_INIT_READ_BD_ADDR: 1589 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1590 hci_send_cmd(&hci_read_bd_addr); 1591 break; 1592 case HCI_INIT_READ_BUFFER_SIZE: 1593 // only read buffer size if supported 1594 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1595 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1596 hci_send_cmd(&hci_read_buffer_size); 1597 break; 1598 } 1599 /* fall through */ 1600 1601 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1602 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1603 hci_send_cmd(&hci_read_local_supported_features); 1604 break; 1605 1606 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1607 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1608 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1609 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1610 break; 1611 case HCI_INIT_HOST_BUFFER_SIZE: 1612 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1613 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1614 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1615 break; 1616 #endif 1617 1618 case HCI_INIT_SET_EVENT_MASK: 1619 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1620 if (hci_le_supported()){ 1621 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1622 } else { 1623 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1624 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1625 } 1626 break; 1627 1628 #ifdef ENABLE_CLASSIC 1629 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1630 if (hci_classic_supported() && gap_ssp_supported()){ 1631 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1632 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1633 break; 1634 } 1635 /* fall through */ 1636 1637 case HCI_INIT_WRITE_INQUIRY_MODE: 1638 if (hci_classic_supported()){ 1639 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1640 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1641 break; 1642 } 1643 /* fall through */ 1644 1645 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1646 // skip write secure connections host support if not supported or disabled 1647 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1648 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1649 hci_stack->secure_connections_active = true; 1650 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1651 break; 1652 } 1653 /* fall through */ 1654 1655 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1656 if (hci_classic_supported()){ 1657 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1658 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1659 break; 1660 } 1661 /* fall through */ 1662 1663 #ifdef ENABLE_SCO_OVER_HCI 1664 // only sent if ENABLE_SCO_OVER_HCI is defined 1665 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1666 // skip write synchronous flow control if not supported 1667 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1668 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1669 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1670 break; 1671 } 1672 /* fall through */ 1673 1674 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1675 // skip write default erroneous data reporting if not supported 1676 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1677 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1678 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1679 break; 1680 } 1681 /* fall through */ 1682 #endif 1683 1684 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1685 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1686 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1687 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1688 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1689 #ifdef ENABLE_SCO_OVER_HCI 1690 log_info("BCM: Route SCO data via HCI transport"); 1691 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1692 #endif 1693 #ifdef ENABLE_SCO_OVER_PCM 1694 log_info("BCM: Route SCO data via PCM interface"); 1695 #ifdef ENABLE_BCM_PCM_WBS 1696 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1697 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1698 #else 1699 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1700 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1701 #endif 1702 #endif 1703 break; 1704 } 1705 /* fall through */ 1706 #endif 1707 1708 #ifdef ENABLE_SCO_OVER_PCM 1709 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1710 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1711 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1712 log_info("BCM: Config PCM interface for I2S"); 1713 #ifdef ENABLE_BCM_PCM_WBS 1714 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1715 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1716 #else 1717 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1718 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1719 #endif 1720 break; 1721 } 1722 /* fall through */ 1723 #endif 1724 #endif 1725 1726 #ifdef ENABLE_BLE 1727 // LE INIT 1728 case HCI_INIT_LE_READ_BUFFER_SIZE: 1729 if (hci_le_supported()){ 1730 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1731 hci_send_cmd(&hci_le_read_buffer_size); 1732 break; 1733 } 1734 /* fall through */ 1735 1736 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1737 // skip write le host if not supported (e.g. on LE only EM9301) 1738 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1739 // LE Supported Host = 1, Simultaneous Host = 0 1740 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1741 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1742 break; 1743 } 1744 /* fall through */ 1745 1746 case HCI_INIT_LE_SET_EVENT_MASK: 1747 if (hci_le_supported()){ 1748 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1749 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1750 break; 1751 } 1752 /* fall through */ 1753 1754 #endif 1755 1756 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1757 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1758 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1759 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1760 hci_send_cmd(&hci_le_read_maximum_data_length); 1761 break; 1762 } 1763 /* fall through */ 1764 1765 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1766 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1767 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1768 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1769 break; 1770 } 1771 /* fall through */ 1772 #endif 1773 1774 #ifdef ENABLE_LE_CENTRAL 1775 case HCI_INIT_READ_WHITE_LIST_SIZE: 1776 if (hci_le_supported()){ 1777 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1778 hci_send_cmd(&hci_le_read_white_list_size); 1779 break; 1780 } 1781 /* fall through */ 1782 1783 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1784 if (hci_le_supported()){ 1785 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1786 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); 1787 break; 1788 } 1789 /* fall through */ 1790 #endif 1791 1792 case HCI_INIT_DONE: 1793 hci_stack->substate = HCI_INIT_DONE; 1794 #ifdef ENABLE_CLASSIC 1795 // init sequence complete, check if GAP Tasks are completed 1796 if (hci_stack->gap_tasks != 0) { 1797 hci_run_gap_tasks_classic(); 1798 break; 1799 } 1800 #endif 1801 hci_init_done(); 1802 break; 1803 1804 default: 1805 return; 1806 } 1807 } 1808 1809 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1810 bool command_completed = false; 1811 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1812 uint16_t opcode = little_endian_read_16(packet,3); 1813 if (opcode == hci_stack->last_cmd_opcode){ 1814 command_completed = true; 1815 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1816 } else { 1817 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1818 } 1819 } 1820 1821 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1822 uint8_t status = packet[2]; 1823 uint16_t opcode = little_endian_read_16(packet,4); 1824 if (opcode == hci_stack->last_cmd_opcode){ 1825 if (status){ 1826 command_completed = true; 1827 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1828 } else { 1829 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1830 } 1831 } else { 1832 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1833 } 1834 } 1835 #ifndef HAVE_HOST_CONTROLLER_API 1836 // Vendor == CSR 1837 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1838 // TODO: track actual command 1839 command_completed = true; 1840 } 1841 1842 // Vendor == Toshiba 1843 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1844 // TODO: track actual command 1845 command_completed = true; 1846 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1847 hci_stack->num_cmd_packets = 1; 1848 } 1849 #endif 1850 1851 return command_completed; 1852 } 1853 1854 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1855 1856 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1857 1858 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1859 1860 #ifndef HAVE_HOST_CONTROLLER_API 1861 1862 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1863 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1864 // 1865 // HCI Reset 1866 // Timeout 100 ms 1867 // HCI Reset 1868 // Command Complete Reset 1869 // HCI Read Local Version Information 1870 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1871 // hang... 1872 // 1873 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1874 if (!command_completed 1875 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1876 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1877 1878 uint16_t opcode = little_endian_read_16(packet,3); 1879 if (opcode == hci_reset.opcode){ 1880 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1881 return; 1882 } 1883 } 1884 1885 // CSR & H5 1886 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1887 if (!command_completed 1888 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1889 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1890 1891 uint16_t opcode = little_endian_read_16(packet,3); 1892 if (opcode == hci_reset.opcode){ 1893 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1894 return; 1895 } 1896 } 1897 1898 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1899 // fix: Correct substate and behave as command below 1900 if (command_completed){ 1901 switch (hci_stack->substate){ 1902 case HCI_INIT_SEND_RESET: 1903 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1904 break; 1905 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1906 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1907 break; 1908 default: 1909 break; 1910 } 1911 } 1912 1913 #endif 1914 1915 if (!command_completed) return; 1916 1917 bool need_baud_change = false; 1918 bool need_addr_change = false; 1919 1920 #ifndef HAVE_HOST_CONTROLLER_API 1921 need_baud_change = hci_stack->config 1922 && hci_stack->chipset 1923 && hci_stack->chipset->set_baudrate_command 1924 && hci_stack->hci_transport->set_baudrate 1925 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1926 1927 need_addr_change = hci_stack->custom_bd_addr_set 1928 && hci_stack->chipset 1929 && hci_stack->chipset->set_bd_addr_command; 1930 #endif 1931 1932 switch(hci_stack->substate){ 1933 1934 #ifndef HAVE_HOST_CONTROLLER_API 1935 case HCI_INIT_SEND_RESET: 1936 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1937 // fix: just correct substate and behave as command below 1938 1939 /* fall through */ 1940 #endif 1941 1942 case HCI_INIT_W4_SEND_RESET: 1943 btstack_run_loop_remove_timer(&hci_stack->timeout); 1944 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1945 return; 1946 1947 #ifndef HAVE_HOST_CONTROLLER_API 1948 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1949 // for STLC2500D, baud rate change already happened. 1950 // for others, baud rate gets changed now 1951 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1952 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1953 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1954 hci_stack->hci_transport->set_baudrate(baud_rate); 1955 } 1956 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1957 return; 1958 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1959 btstack_run_loop_remove_timer(&hci_stack->timeout); 1960 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1961 return; 1962 case HCI_INIT_W4_CUSTOM_INIT: 1963 // repeat custom init 1964 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1965 return; 1966 #endif 1967 1968 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1969 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1970 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1971 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1972 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1973 return; 1974 } 1975 if (need_addr_change){ 1976 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1977 return; 1978 } 1979 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1980 return; 1981 #ifndef HAVE_HOST_CONTROLLER_API 1982 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1983 if (need_baud_change){ 1984 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1985 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1986 hci_stack->hci_transport->set_baudrate(baud_rate); 1987 } 1988 if (need_addr_change){ 1989 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1990 return; 1991 } 1992 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1993 return; 1994 case HCI_INIT_W4_SET_BD_ADDR: 1995 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1996 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1997 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1998 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1999 return; 2000 } 2001 // skipping st warm boot 2002 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2003 return; 2004 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2005 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2006 return; 2007 #endif 2008 2009 case HCI_INIT_DONE: 2010 // set state if we came here by fall through 2011 hci_stack->substate = HCI_INIT_DONE; 2012 return; 2013 2014 default: 2015 break; 2016 } 2017 hci_initializing_next_state(); 2018 } 2019 2020 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2021 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2022 bd_addr_t bd_address; 2023 (void)memcpy(&bd_address, conn->address, 6); 2024 2025 #ifdef ENABLE_CLASSIC 2026 // cache needed data 2027 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2028 #endif 2029 2030 // connection failed, remove entry 2031 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2032 btstack_memory_hci_connection_free( conn ); 2033 2034 #ifdef ENABLE_CLASSIC 2035 // notify client if dedicated bonding 2036 if (notify_dedicated_bonding_failed){ 2037 log_info("hci notify_dedicated_bonding_failed"); 2038 hci_emit_dedicated_bonding_result(bd_address, status); 2039 } 2040 2041 // if authentication error, also delete link key 2042 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2043 gap_drop_link_key_for_bd_addr(bd_address); 2044 } 2045 #else 2046 UNUSED(status); 2047 #endif 2048 } 2049 2050 #ifdef ENABLE_CLASSIC 2051 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2052 // SSP Controller 2053 if (features[6] & (1 << 3)){ 2054 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2055 } 2056 // eSCO 2057 if (features[3] & (1<<7)){ 2058 conn->remote_supported_features[0] |= 1; 2059 } 2060 // Extended features 2061 if (features[7] & (1<<7)){ 2062 conn->remote_supported_features[0] |= 2; 2063 } 2064 } 2065 2066 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2067 // SSP Host 2068 if (features[0] & (1 << 0)){ 2069 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2070 } 2071 // SC Host 2072 if (features[0] & (1 << 3)){ 2073 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2074 } 2075 } 2076 2077 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2078 // SC Controller 2079 if (features[1] & (1 << 0)){ 2080 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2081 } 2082 } 2083 2084 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2085 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2086 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2087 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2088 if (conn->bonding_flags & BONDING_DEDICATED){ 2089 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2090 } 2091 } 2092 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2093 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2094 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2095 } 2096 2097 #endif 2098 2099 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2100 // handle BT initialization 2101 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2102 hci_initializing_event_handler(packet, size); 2103 } 2104 2105 // help with BT sleep 2106 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2107 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2108 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2109 hci_initializing_next_state(); 2110 } 2111 } 2112 2113 #ifdef ENABLE_CLASSIC 2114 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2115 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2116 conn->encryption_key_size = encryption_key_size; 2117 2118 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2119 conn->requested_security_level = LEVEL_0; 2120 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2121 return; 2122 } 2123 2124 // Request remote features if not already done 2125 if ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) == 0) { 2126 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2127 } 2128 2129 // Request Authentication if not already done 2130 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2131 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2132 } 2133 #endif 2134 2135 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2136 UNUSED(size); 2137 2138 uint16_t manufacturer; 2139 #ifdef ENABLE_CLASSIC 2140 hci_con_handle_t handle; 2141 hci_connection_t * conn; 2142 uint8_t status; 2143 #endif 2144 // get num cmd packets - limit to 1 to reduce complexity 2145 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2146 2147 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2148 switch (opcode){ 2149 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2150 if (packet[5]) break; 2151 // terminate, name 248 chars 2152 packet[6+248] = 0; 2153 log_info("local name: %s", &packet[6]); 2154 break; 2155 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2156 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2157 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2158 uint16_t acl_len = little_endian_read_16(packet, 6); 2159 uint16_t sco_len = packet[8]; 2160 2161 // determine usable ACL/SCO payload size 2162 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2163 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2164 2165 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2166 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2167 2168 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2169 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2170 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2171 } 2172 break; 2173 case HCI_OPCODE_HCI_READ_RSSI: 2174 if (packet[5] == ERROR_CODE_SUCCESS){ 2175 uint8_t event[5]; 2176 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2177 event[1] = 3; 2178 (void)memcpy(&event[2], &packet[6], 3); 2179 hci_emit_event(event, sizeof(event), 1); 2180 } 2181 break; 2182 #ifdef ENABLE_BLE 2183 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2184 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2185 hci_stack->le_acl_packets_total_num = packet[8]; 2186 // determine usable ACL payload size 2187 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2188 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2189 } 2190 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2191 break; 2192 #endif 2193 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2194 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2195 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2196 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2197 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); 2198 break; 2199 #endif 2200 #ifdef ENABLE_LE_CENTRAL 2201 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2202 hci_stack->le_whitelist_capacity = packet[6]; 2203 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2204 break; 2205 #endif 2206 case HCI_OPCODE_HCI_READ_BD_ADDR: 2207 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2208 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)); 2209 #ifdef ENABLE_CLASSIC 2210 if (hci_stack->link_key_db){ 2211 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2212 } 2213 #endif 2214 break; 2215 #ifdef ENABLE_CLASSIC 2216 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2217 hci_emit_discoverable_enabled(hci_stack->discoverable); 2218 break; 2219 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2220 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2221 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2222 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2223 hci_emit_event(event, sizeof(event), 1); 2224 } 2225 break; 2226 #endif 2227 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2228 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2229 2230 #ifdef ENABLE_CLASSIC 2231 // determine usable ACL packet types based on host buffer size and supported features 2232 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2233 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2234 #endif 2235 // Classic/LE 2236 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2237 break; 2238 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2239 manufacturer = little_endian_read_16(packet, 10); 2240 // map Cypress to Broadcom 2241 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2242 log_info("Treat Cypress as Broadcom"); 2243 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2244 little_endian_store_16(packet, 10, manufacturer); 2245 } 2246 hci_stack->manufacturer = manufacturer; 2247 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2248 break; 2249 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2250 hci_stack->local_supported_commands[0] = 2251 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2252 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2253 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2254 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2255 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2256 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2257 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2258 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2259 hci_stack->local_supported_commands[1] = 2260 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2261 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2262 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2263 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2264 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2265 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2266 break; 2267 #ifdef ENABLE_CLASSIC 2268 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2269 if (packet[5]) return; 2270 hci_stack->synchronous_flow_control_enabled = 1; 2271 break; 2272 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2273 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2274 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2275 conn = hci_connection_for_handle(handle); 2276 if (conn != NULL) { 2277 uint8_t key_size = 0; 2278 if (status == 0){ 2279 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2280 log_info("Handle %04x key Size: %u", handle, key_size); 2281 } else { 2282 key_size = 1; 2283 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2284 } 2285 hci_handle_read_encryption_key_size_complete(conn, key_size); 2286 } 2287 break; 2288 // assert pairing complete event is emitted. 2289 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2290 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2291 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2292 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2293 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2294 // lookup connection by gap pairing addr 2295 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2296 if (conn == NULL) break; 2297 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2298 break; 2299 2300 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2301 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2302 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2303 uint8_t event[67]; 2304 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2305 event[1] = 65; 2306 (void)memset(&event[2], 0, 65); 2307 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2308 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2309 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2310 event[2] = 3; 2311 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2312 } else { 2313 event[2] = 1; 2314 } 2315 } 2316 hci_emit_event(event, sizeof(event), 0); 2317 break; 2318 } 2319 2320 // note: only needed if user does not provide OOB data 2321 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2322 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2323 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2324 if (conn == NULL) break; 2325 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2326 break; 2327 #endif 2328 #endif 2329 default: 2330 break; 2331 } 2332 } 2333 2334 #ifdef ENABLE_BLE 2335 static void event_handle_le_connection_complete(const uint8_t * packet){ 2336 bd_addr_t addr; 2337 bd_addr_type_t addr_type; 2338 hci_connection_t * conn; 2339 2340 // Connection management 2341 reverse_bd_addr(&packet[8], addr); 2342 addr_type = (bd_addr_type_t)packet[7]; 2343 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2344 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2345 2346 #ifdef ENABLE_LE_CENTRAL 2347 // handle error: error is reported only to the initiator -> outgoing connection 2348 if (packet[3]){ 2349 2350 // handle cancelled outgoing connection 2351 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2352 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2353 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2354 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2355 // reset state 2356 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2357 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2358 // get outgoing connection conn struct for direct connect 2359 conn = gap_get_outgoing_connection(); 2360 } 2361 2362 // outgoing le connection establishment is done 2363 if (conn){ 2364 // remove entry 2365 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2366 btstack_memory_hci_connection_free( conn ); 2367 } 2368 return; 2369 } 2370 #endif 2371 2372 // on success, both hosts receive connection complete event 2373 if (packet[6] == HCI_ROLE_MASTER){ 2374 #ifdef ENABLE_LE_CENTRAL 2375 // if we're master on an le connection, it was an outgoing connection and we're done with it 2376 // note: no hci_connection_t object exists yet for connect with whitelist 2377 if (hci_is_le_connection_type(addr_type)){ 2378 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2379 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2380 } 2381 #endif 2382 } else { 2383 #ifdef ENABLE_LE_PERIPHERAL 2384 // if we're slave, it was an incoming connection, advertisements have stopped 2385 hci_stack->le_advertisements_active = false; 2386 #endif 2387 } 2388 2389 // LE connections are auto-accepted, so just create a connection if there isn't one already 2390 if (!conn){ 2391 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2392 } 2393 2394 // no memory, sorry. 2395 if (!conn){ 2396 return; 2397 } 2398 2399 conn->state = OPEN; 2400 conn->role = packet[6]; 2401 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2402 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2403 2404 #ifdef ENABLE_LE_PERIPHERAL 2405 if (packet[6] == HCI_ROLE_SLAVE){ 2406 hci_update_advertisements_enabled_for_current_roles(); 2407 } 2408 #endif 2409 2410 // init unenhanced att bearer mtu 2411 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2412 conn->att_connection.mtu_exchanged = false; 2413 2414 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2415 2416 // restart timer 2417 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2418 // btstack_run_loop_add_timer(&conn->timeout); 2419 2420 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2421 2422 hci_emit_nr_connections_changed(); 2423 } 2424 #endif 2425 2426 #ifdef ENABLE_CLASSIC 2427 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){ 2428 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2429 // LEVEL_4 is tested by l2cap 2430 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2431 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2432 if (level >= LEVEL_3){ 2433 // MITM not possible without keyboard or display 2434 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2435 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2436 2437 // MITM possible if one side has keyboard and the other has keyboard or display 2438 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2439 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2440 2441 // MITM not possible if one side has only display and other side has no keyboard 2442 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2443 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2444 } 2445 // LEVEL 2 requires SSP, which is a given 2446 return true; 2447 } 2448 2449 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2450 uint16_t i; 2451 for (i=0; i < size ; i++){ 2452 if (data[i] != 0) { 2453 return false; 2454 } 2455 } 2456 return true; 2457 } 2458 2459 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2460 // get requested security level 2461 gap_security_level_t requested_security_level = conn->requested_security_level; 2462 if (hci_stack->gap_secure_connections_only_mode){ 2463 requested_security_level = LEVEL_4; 2464 } 2465 2466 // assess security: LEVEL 4 requires SC 2467 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2468 if ((requested_security_level == LEVEL_4) && 2469 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2470 !hci_remote_sc_enabled(conn)){ 2471 log_info("Level 4 required, but SC not supported -> abort"); 2472 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2473 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2474 return; 2475 } 2476 2477 // assess security based on io capabilities 2478 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2479 // responder: fully validate io caps of both sides as well as OOB data 2480 bool security_possible = false; 2481 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2482 2483 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2484 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2485 // so we merge the OOB data availability 2486 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2487 if (conn->classic_oob_c_192 != NULL){ 2488 have_oob_data |= 1; 2489 } 2490 if (conn->classic_oob_c_256 != NULL){ 2491 have_oob_data |= 2; 2492 } 2493 // for up to Level 3, either P-192 as well as P-256 will do 2494 // 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 2495 // if remote does not SC, we should not receive P-256 data either 2496 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2497 security_possible = true; 2498 } 2499 // for Level 4, P-256 is needed 2500 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2501 security_possible = true; 2502 } 2503 #endif 2504 2505 if (security_possible == false){ 2506 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2507 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2508 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2509 return; 2510 } 2511 } else { 2512 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2513 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2514 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2515 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2516 log_info("Level 3+ required, but no input/output -> abort"); 2517 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2518 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2519 return; 2520 } 2521 #endif 2522 #endif 2523 } 2524 2525 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2526 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2527 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2528 } else { 2529 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2530 } 2531 #endif 2532 } 2533 2534 #endif 2535 2536 static void event_handler(uint8_t *packet, uint16_t size){ 2537 2538 uint16_t event_length = packet[1]; 2539 2540 // assert packet is complete 2541 if (size != (event_length + 2u)){ 2542 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2543 return; 2544 } 2545 2546 bd_addr_type_t addr_type; 2547 hci_con_handle_t handle; 2548 hci_connection_t * conn; 2549 int i; 2550 int create_connection_cmd; 2551 2552 #ifdef ENABLE_CLASSIC 2553 hci_link_type_t link_type; 2554 bd_addr_t addr; 2555 #endif 2556 2557 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2558 2559 switch (hci_event_packet_get_type(packet)) { 2560 2561 case HCI_EVENT_COMMAND_COMPLETE: 2562 handle_command_complete_event(packet, size); 2563 break; 2564 2565 case HCI_EVENT_COMMAND_STATUS: 2566 // get num cmd packets - limit to 1 to reduce complexity 2567 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2568 2569 // check command status to detected failed outgoing connections 2570 create_connection_cmd = 0; 2571 #ifdef ENABLE_CLASSIC 2572 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2573 create_connection_cmd = 1; 2574 } 2575 #endif 2576 #ifdef ENABLE_LE_CENTRAL 2577 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2578 create_connection_cmd = 1; 2579 } 2580 #endif 2581 if (create_connection_cmd) { 2582 uint8_t status = hci_event_command_status_get_status(packet); 2583 addr_type = hci_stack->outgoing_addr_type; 2584 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2585 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); 2586 2587 // reset outgoing address info 2588 memset(hci_stack->outgoing_addr, 0, 6); 2589 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2590 2591 // on error 2592 if (status != ERROR_CODE_SUCCESS){ 2593 #ifdef ENABLE_LE_CENTRAL 2594 if (hci_is_le_connection_type(addr_type)){ 2595 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2596 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2597 } 2598 #endif 2599 // error => outgoing connection failed 2600 if (conn != NULL){ 2601 hci_handle_connection_failed(conn, status); 2602 } 2603 } 2604 } 2605 2606 #ifdef ENABLE_CLASSIC 2607 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2608 uint8_t status = hci_event_command_status_get_status(packet); 2609 log_info("command status (inquiry), status %x", status); 2610 if (status == ERROR_CODE_SUCCESS) { 2611 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2612 } else { 2613 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2614 } 2615 } 2616 #endif 2617 break; 2618 2619 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2620 if (size < 3) return; 2621 uint16_t num_handles = packet[2]; 2622 if (size != (3u + num_handles * 4u)) return; 2623 uint16_t offset = 3; 2624 for (i=0; i<num_handles;i++){ 2625 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2626 offset += 2u; 2627 uint16_t num_packets = little_endian_read_16(packet, offset); 2628 offset += 2u; 2629 2630 conn = hci_connection_for_handle(handle); 2631 if (!conn){ 2632 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2633 continue; 2634 } 2635 2636 if (conn->num_packets_sent >= num_packets){ 2637 conn->num_packets_sent -= num_packets; 2638 } else { 2639 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2640 conn->num_packets_sent = 0; 2641 } 2642 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2643 2644 #ifdef ENABLE_CLASSIC 2645 // For SCO, we do the can_send_now_check here 2646 hci_notify_if_sco_can_send_now(); 2647 #endif 2648 } 2649 break; 2650 } 2651 2652 #ifdef ENABLE_CLASSIC 2653 case HCI_EVENT_INQUIRY_COMPLETE: 2654 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2655 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2656 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2657 hci_emit_event(event, sizeof(event), 1); 2658 } 2659 break; 2660 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2661 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2662 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2663 } 2664 break; 2665 case HCI_EVENT_CONNECTION_REQUEST: 2666 reverse_bd_addr(&packet[2], addr); 2667 link_type = (hci_link_type_t) packet[11]; 2668 2669 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2670 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2671 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2672 bd_addr_copy(hci_stack->decline_addr, addr); 2673 break; 2674 } 2675 2676 if (hci_stack->gap_classic_accept_callback != NULL){ 2677 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2678 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2679 bd_addr_copy(hci_stack->decline_addr, addr); 2680 break; 2681 } 2682 } 2683 2684 // TODO: eval COD 8-10 2685 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2686 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2687 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2688 if (!conn) { 2689 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2690 } 2691 if (!conn) { 2692 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2693 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2694 bd_addr_copy(hci_stack->decline_addr, addr); 2695 break; 2696 } 2697 conn->role = HCI_ROLE_SLAVE; 2698 conn->state = RECEIVED_CONNECTION_REQUEST; 2699 // store info about eSCO 2700 if (link_type == HCI_LINK_TYPE_ESCO){ 2701 conn->remote_supported_features[0] |= 1; 2702 } 2703 hci_run(); 2704 break; 2705 2706 case HCI_EVENT_CONNECTION_COMPLETE: 2707 // Connection management 2708 reverse_bd_addr(&packet[5], addr); 2709 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2710 addr_type = BD_ADDR_TYPE_ACL; 2711 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2712 if (conn) { 2713 if (!packet[2]){ 2714 conn->state = OPEN; 2715 conn->con_handle = little_endian_read_16(packet, 3); 2716 2717 // queue set supervision timeout if we're master 2718 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2719 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2720 } 2721 2722 // restart timer 2723 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2724 btstack_run_loop_add_timer(&conn->timeout); 2725 2726 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2727 2728 hci_emit_nr_connections_changed(); 2729 } else { 2730 // connection failed 2731 hci_handle_connection_failed(conn, packet[2]); 2732 } 2733 } 2734 break; 2735 2736 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2737 reverse_bd_addr(&packet[5], addr); 2738 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2739 if (packet[2]){ 2740 // connection failed 2741 break; 2742 } 2743 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2744 if (!conn) { 2745 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2746 } 2747 if (!conn) { 2748 break; 2749 } 2750 conn->state = OPEN; 2751 conn->con_handle = little_endian_read_16(packet, 3); 2752 2753 #ifdef ENABLE_SCO_OVER_HCI 2754 // update SCO 2755 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2756 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2757 } 2758 // trigger can send now 2759 if (hci_have_usb_transport()){ 2760 hci_stack->sco_can_send_now = true; 2761 } 2762 #endif 2763 #ifdef HAVE_SCO_TRANSPORT 2764 // configure sco transport 2765 if (hci_stack->sco_transport != NULL){ 2766 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2767 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2768 } 2769 #endif 2770 break; 2771 2772 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2773 handle = little_endian_read_16(packet, 3); 2774 conn = hci_connection_for_handle(handle); 2775 if (!conn) break; 2776 if (!packet[2]){ 2777 const uint8_t * features = &packet[5]; 2778 hci_handle_remote_features_page_0(conn, features); 2779 2780 // read extended features if possible 2781 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2782 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2783 break; 2784 } 2785 } 2786 hci_handle_remote_features_received(conn); 2787 break; 2788 2789 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2790 handle = little_endian_read_16(packet, 3); 2791 conn = hci_connection_for_handle(handle); 2792 if (!conn) break; 2793 // status = ok, page = 1 2794 if (!packet[2]) { 2795 uint8_t page_number = packet[5]; 2796 uint8_t maximum_page_number = packet[6]; 2797 const uint8_t * features = &packet[7]; 2798 bool done = false; 2799 switch (page_number){ 2800 case 1: 2801 hci_handle_remote_features_page_1(conn, features); 2802 if (maximum_page_number >= 2){ 2803 // get Secure Connections (Controller) from Page 2 if available 2804 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2805 } else { 2806 // otherwise, assume SC (Controller) == SC (Host) 2807 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2808 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2809 } 2810 done = true; 2811 } 2812 break; 2813 case 2: 2814 hci_handle_remote_features_page_2(conn, features); 2815 done = true; 2816 break; 2817 default: 2818 break; 2819 } 2820 if (!done) break; 2821 } 2822 hci_handle_remote_features_received(conn); 2823 break; 2824 2825 case HCI_EVENT_LINK_KEY_REQUEST: 2826 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2827 hci_event_link_key_request_get_bd_addr(packet, addr); 2828 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2829 if (!conn) break; 2830 2831 // lookup link key in db if not cached 2832 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2833 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2834 } 2835 2836 // response sent by hci_run() 2837 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2838 #endif 2839 break; 2840 2841 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2842 hci_event_link_key_request_get_bd_addr(packet, addr); 2843 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2844 if (!conn) break; 2845 2846 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2847 2848 // CVE-2020-26555: ignore NULL link key 2849 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2850 if (btstack_is_null(&packet[8], 16)) break; 2851 2852 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2853 // Change Connection Encryption keeps link key type 2854 if (link_key_type != CHANGED_COMBINATION_KEY){ 2855 conn->link_key_type = link_key_type; 2856 } 2857 2858 // cache link key. link keys stored in little-endian format for legacy reasons 2859 memcpy(&conn->link_key, &packet[8], 16); 2860 2861 // only store link key: 2862 // - if bondable enabled 2863 if (hci_stack->bondable == false) break; 2864 // - if security level sufficient 2865 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2866 // - for SSP, also check if remote side requested bonding as well 2867 if (conn->link_key_type != COMBINATION_KEY){ 2868 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2869 if (!remote_bonding){ 2870 break; 2871 } 2872 } 2873 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2874 break; 2875 } 2876 2877 case HCI_EVENT_PIN_CODE_REQUEST: 2878 hci_event_pin_code_request_get_bd_addr(packet, addr); 2879 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2880 if (!conn) break; 2881 2882 hci_pairing_started(conn, false); 2883 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2884 if (!hci_stack->bondable ){ 2885 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2886 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2887 hci_run(); 2888 return; 2889 } 2890 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2891 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2892 log_info("Level 4 required, but SC not supported -> abort"); 2893 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2894 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2895 hci_run(); 2896 return; 2897 } 2898 break; 2899 2900 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2901 hci_event_io_capability_response_get_bd_addr(packet, addr); 2902 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2903 if (!conn) break; 2904 2905 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2906 hci_pairing_started(conn, true); 2907 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2908 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2909 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2910 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2911 #endif 2912 break; 2913 2914 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2915 hci_event_io_capability_response_get_bd_addr(packet, addr); 2916 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2917 if (!conn) break; 2918 2919 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2920 hci_connection_timestamp(conn); 2921 hci_pairing_started(conn, true); 2922 break; 2923 2924 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2925 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2926 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2927 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2928 if (!conn) break; 2929 2930 hci_connection_timestamp(conn); 2931 2932 hci_pairing_started(conn, true); 2933 2934 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2935 break; 2936 #endif 2937 2938 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2939 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2940 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2941 if (!conn) break; 2942 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2943 if (hci_stack->ssp_auto_accept){ 2944 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2945 }; 2946 } else { 2947 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2948 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2949 // don't forward event to app 2950 hci_run(); 2951 return; 2952 } 2953 break; 2954 2955 case HCI_EVENT_USER_PASSKEY_REQUEST: 2956 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2957 if (hci_stack->ssp_auto_accept){ 2958 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2959 }; 2960 break; 2961 2962 case HCI_EVENT_MODE_CHANGE: 2963 handle = hci_event_mode_change_get_handle(packet); 2964 conn = hci_connection_for_handle(handle); 2965 if (!conn) break; 2966 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2967 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2968 break; 2969 #endif 2970 2971 case HCI_EVENT_ENCRYPTION_CHANGE: 2972 handle = hci_event_encryption_change_get_connection_handle(packet); 2973 conn = hci_connection_for_handle(handle); 2974 if (!conn) break; 2975 if (hci_event_encryption_change_get_status(packet) == 0u) { 2976 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2977 if (encryption_enabled){ 2978 if (hci_is_le_connection(conn)){ 2979 // For LE, we accept connection as encrypted 2980 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2981 } 2982 #ifdef ENABLE_CLASSIC 2983 else { 2984 2985 // dedicated bonding: send result and disconnect 2986 if (conn->bonding_flags & BONDING_DEDICATED){ 2987 conn->bonding_flags &= ~BONDING_DEDICATED; 2988 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2989 conn->bonding_status = packet[2]; 2990 break; 2991 } 2992 2993 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2994 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2995 bool connected_uses_aes_ccm = encryption_enabled == 2; 2996 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2997 log_info("SC during pairing, but only E0 now -> abort"); 2998 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2999 break; 3000 } 3001 3002 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3003 if (connected_uses_aes_ccm){ 3004 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3005 } 3006 3007 #ifdef ENABLE_TESTING_SUPPORT 3008 // work around for issue with PTS dongle 3009 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3010 #endif 3011 3012 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3013 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3014 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3015 } else { 3016 // if not, pretend everything is perfect 3017 hci_handle_read_encryption_key_size_complete(conn, 16); 3018 } 3019 } 3020 #endif 3021 } else { 3022 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3023 } 3024 } 3025 3026 break; 3027 3028 #ifdef ENABLE_CLASSIC 3029 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3030 handle = hci_event_authentication_complete_get_connection_handle(packet); 3031 conn = hci_connection_for_handle(handle); 3032 if (!conn) break; 3033 3034 // clear authentication active flag 3035 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3036 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3037 3038 // authenticated only if auth status == 0 3039 if (hci_event_authentication_complete_get_status(packet) == 0){ 3040 // authenticated 3041 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3042 3043 // If not already encrypted, start encryption 3044 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3045 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3046 break; 3047 } 3048 } 3049 3050 // emit updated security level 3051 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3052 break; 3053 3054 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3055 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3056 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3057 if (!conn) break; 3058 3059 // treat successfully paired connection as authenticated 3060 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3061 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3062 } 3063 3064 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3065 break; 3066 #endif 3067 3068 // HCI_EVENT_DISCONNECTION_COMPLETE 3069 // has been split, to first notify stack before shutting connection down 3070 // see end of function, too. 3071 case HCI_EVENT_DISCONNECTION_COMPLETE: 3072 if (packet[2]) break; // status != 0 3073 handle = little_endian_read_16(packet, 3); 3074 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3075 if (hci_stack->acl_fragmentation_total_size > 0u) { 3076 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3077 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3078 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3079 hci_stack->acl_fragmentation_total_size = 0; 3080 hci_stack->acl_fragmentation_pos = 0; 3081 if (release_buffer){ 3082 hci_release_packet_buffer(); 3083 } 3084 } 3085 } 3086 3087 conn = hci_connection_for_handle(handle); 3088 if (!conn) break; 3089 #ifdef ENABLE_CLASSIC 3090 // pairing failed if it was ongoing 3091 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3092 #endif 3093 3094 // emit dedicatd bonding event 3095 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3096 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3097 } 3098 3099 // mark connection for shutdown, stop timers, reset state 3100 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3101 hci_connection_stop_timer(conn); 3102 hci_connection_init(conn); 3103 3104 #ifdef ENABLE_BLE 3105 #ifdef ENABLE_LE_PERIPHERAL 3106 // re-enable advertisements for le connections if active 3107 if (hci_is_le_connection(conn)){ 3108 hci_update_advertisements_enabled_for_current_roles(); 3109 } 3110 #endif 3111 #endif 3112 break; 3113 3114 case HCI_EVENT_HARDWARE_ERROR: 3115 log_error("Hardware Error: 0x%02x", packet[2]); 3116 if (hci_stack->hardware_error_callback){ 3117 (*hci_stack->hardware_error_callback)(packet[2]); 3118 } else { 3119 // if no special requests, just reboot stack 3120 hci_power_control_off(); 3121 hci_power_control_on(); 3122 } 3123 break; 3124 3125 #ifdef ENABLE_CLASSIC 3126 case HCI_EVENT_ROLE_CHANGE: 3127 if (packet[2]) break; // status != 0 3128 reverse_bd_addr(&packet[3], addr); 3129 addr_type = BD_ADDR_TYPE_ACL; 3130 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3131 if (!conn) break; 3132 conn->role = packet[9]; 3133 break; 3134 #endif 3135 3136 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3137 // release packet buffer only for asynchronous transport and if there are not further fragements 3138 if (hci_transport_synchronous()) { 3139 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3140 return; // instead of break: to avoid re-entering hci_run() 3141 } 3142 hci_stack->acl_fragmentation_tx_active = 0; 3143 if (hci_stack->acl_fragmentation_total_size) break; 3144 hci_release_packet_buffer(); 3145 3146 // L2CAP receives this event via the hci_emit_event below 3147 3148 #ifdef ENABLE_CLASSIC 3149 // For SCO, we do the can_send_now_check here 3150 hci_notify_if_sco_can_send_now(); 3151 #endif 3152 break; 3153 3154 #ifdef ENABLE_CLASSIC 3155 case HCI_EVENT_SCO_CAN_SEND_NOW: 3156 // For SCO, we do the can_send_now_check here 3157 hci_stack->sco_can_send_now = true; 3158 hci_notify_if_sco_can_send_now(); 3159 return; 3160 3161 // explode inquriy results for easier consumption 3162 case HCI_EVENT_INQUIRY_RESULT: 3163 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3164 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3165 gap_inquiry_explode(packet, size); 3166 break; 3167 #endif 3168 3169 #ifdef ENABLE_BLE 3170 case HCI_EVENT_LE_META: 3171 switch (packet[2]){ 3172 #ifdef ENABLE_LE_CENTRAL 3173 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3174 // log_info("advertising report received"); 3175 if (!hci_stack->le_scanning_enabled) break; 3176 le_handle_advertisement_report(packet, size); 3177 break; 3178 #endif 3179 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3180 event_handle_le_connection_complete(packet); 3181 break; 3182 3183 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3184 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3185 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3186 conn = hci_connection_for_handle(handle); 3187 if (!conn) break; 3188 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3189 break; 3190 3191 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3192 // connection 3193 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3194 conn = hci_connection_for_handle(handle); 3195 if (conn) { 3196 // read arguments 3197 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3198 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3199 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3200 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3201 3202 // validate against current connection parameter range 3203 le_connection_parameter_range_t existing_range; 3204 gap_get_connection_parameter_range(&existing_range); 3205 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3206 if (update_parameter){ 3207 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3208 conn->le_conn_interval_min = le_conn_interval_min; 3209 conn->le_conn_interval_max = le_conn_interval_max; 3210 conn->le_conn_latency = le_conn_latency; 3211 conn->le_supervision_timeout = le_supervision_timeout; 3212 } else { 3213 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3214 } 3215 } 3216 break; 3217 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3218 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3219 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3220 conn = hci_connection_for_handle(handle); 3221 if (conn) { 3222 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3223 } 3224 break; 3225 #endif 3226 default: 3227 break; 3228 } 3229 break; 3230 #endif 3231 case HCI_EVENT_VENDOR_SPECIFIC: 3232 // Vendor specific commands often create vendor specific event instead of num completed packets 3233 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3234 switch (hci_stack->manufacturer){ 3235 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3236 hci_stack->num_cmd_packets = 1; 3237 break; 3238 default: 3239 break; 3240 } 3241 break; 3242 default: 3243 break; 3244 } 3245 3246 handle_event_for_current_stack_state(packet, size); 3247 3248 // notify upper stack 3249 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3250 3251 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3252 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3253 handle = little_endian_read_16(packet, 3); 3254 hci_connection_t * aConn = hci_connection_for_handle(handle); 3255 // discard connection if app did not trigger a reconnect in the event handler 3256 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3257 hci_shutdown_connection(aConn); 3258 } 3259 } 3260 3261 // execute main loop 3262 hci_run(); 3263 } 3264 3265 #ifdef ENABLE_CLASSIC 3266 3267 #ifdef ENABLE_SCO_OVER_HCI 3268 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3269 static void sco_schedule_tx(hci_connection_t * conn); 3270 3271 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3272 log_debug("SCO TX Timeout"); 3273 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3274 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3275 if (!conn) return; 3276 3277 // trigger send 3278 conn->sco_tx_ready = 1; 3279 // extra packet if CVSD but SCO buffer is too short 3280 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3281 conn->sco_tx_ready++; 3282 } 3283 hci_notify_if_sco_can_send_now(); 3284 } 3285 3286 3287 #define SCO_TX_AFTER_RX_MS (6) 3288 3289 static void sco_schedule_tx(hci_connection_t * conn){ 3290 3291 uint32_t now = btstack_run_loop_get_time_ms(); 3292 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3293 int time_delta_ms = sco_tx_ms - now; 3294 3295 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3296 3297 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3298 btstack_run_loop_remove_timer(timer); 3299 btstack_run_loop_set_timer(timer, time_delta_ms); 3300 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3301 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3302 btstack_run_loop_add_timer(timer); 3303 } 3304 #endif 3305 3306 static void sco_handler(uint8_t * packet, uint16_t size){ 3307 // lookup connection struct 3308 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3309 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3310 if (!conn) return; 3311 3312 #ifdef ENABLE_SCO_OVER_HCI 3313 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3314 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3315 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3316 packet[2] = 0x3c; 3317 memmove(&packet[3], &packet[23], 63); 3318 size = 63; 3319 } 3320 } 3321 3322 if (hci_have_usb_transport()){ 3323 // Nothing to do 3324 } else { 3325 // 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); 3326 if (hci_stack->synchronous_flow_control_enabled == 0){ 3327 uint32_t now = btstack_run_loop_get_time_ms(); 3328 3329 if (!conn->sco_rx_valid){ 3330 // ignore first 10 packets 3331 conn->sco_rx_count++; 3332 // log_debug("sco rx count %u", conn->sco_rx_count); 3333 if (conn->sco_rx_count == 10) { 3334 // use first timestamp as is and pretent it just started 3335 conn->sco_rx_ms = now; 3336 conn->sco_rx_valid = 1; 3337 conn->sco_rx_count = 0; 3338 sco_schedule_tx(conn); 3339 } 3340 } else { 3341 // track expected arrival timme 3342 conn->sco_rx_count++; 3343 conn->sco_rx_ms += 7; 3344 int delta = (int32_t) (now - conn->sco_rx_ms); 3345 if (delta > 0){ 3346 conn->sco_rx_ms++; 3347 } 3348 // log_debug("sco rx %u", conn->sco_rx_ms); 3349 sco_schedule_tx(conn); 3350 } 3351 } 3352 } 3353 #endif 3354 3355 // deliver to app 3356 if (hci_stack->sco_packet_handler) { 3357 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3358 } 3359 3360 #ifdef HAVE_SCO_TRANSPORT 3361 // We can send one packet for each received packet 3362 conn->sco_tx_ready++; 3363 hci_notify_if_sco_can_send_now(); 3364 #endif 3365 3366 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3367 conn->num_packets_completed++; 3368 hci_stack->host_completed_packets = 1; 3369 hci_run(); 3370 #endif 3371 } 3372 #endif 3373 3374 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3375 hci_dump_packet(packet_type, 1, packet, size); 3376 switch (packet_type) { 3377 case HCI_EVENT_PACKET: 3378 event_handler(packet, size); 3379 break; 3380 case HCI_ACL_DATA_PACKET: 3381 acl_handler(packet, size); 3382 break; 3383 #ifdef ENABLE_CLASSIC 3384 case HCI_SCO_DATA_PACKET: 3385 sco_handler(packet, size); 3386 break; 3387 #endif 3388 default: 3389 break; 3390 } 3391 } 3392 3393 /** 3394 * @brief Add event packet handler. 3395 */ 3396 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3397 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3398 } 3399 3400 /** 3401 * @brief Remove event packet handler. 3402 */ 3403 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3404 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3405 } 3406 3407 /** Register HCI packet handlers */ 3408 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3409 hci_stack->acl_packet_handler = handler; 3410 } 3411 3412 #ifdef ENABLE_CLASSIC 3413 /** 3414 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3415 */ 3416 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3417 hci_stack->sco_packet_handler = handler; 3418 } 3419 #endif 3420 3421 static void hci_state_reset(void){ 3422 // no connections yet 3423 hci_stack->connections = NULL; 3424 3425 // keep discoverable/connectable as this has been requested by the client(s) 3426 // hci_stack->discoverable = 0; 3427 // hci_stack->connectable = 0; 3428 // hci_stack->bondable = 1; 3429 // hci_stack->own_addr_type = 0; 3430 3431 // buffer is free 3432 hci_stack->hci_packet_buffer_reserved = false; 3433 3434 // no pending cmds 3435 hci_stack->decline_reason = 0; 3436 3437 hci_stack->secure_connections_active = false; 3438 3439 #ifdef ENABLE_CLASSIC 3440 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3441 hci_stack->gap_tasks = 3442 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3443 GAP_TASK_SET_CLASS_OF_DEVICE | 3444 GAP_TASK_SET_LOCAL_NAME | 3445 GAP_TASK_SET_EIR_DATA | 3446 GAP_TASK_WRITE_SCAN_ENABLE; 3447 #endif 3448 3449 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3450 hci_stack->classic_read_local_oob_data = false; 3451 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3452 #endif 3453 3454 // LE 3455 #ifdef ENABLE_BLE 3456 memset(hci_stack->le_random_address, 0, 6); 3457 hci_stack->le_random_address_set = 0; 3458 #endif 3459 #ifdef ENABLE_LE_CENTRAL 3460 hci_stack->le_scanning_active = false; 3461 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3462 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3463 hci_stack->le_whitelist_capacity = 0; 3464 #endif 3465 #ifdef ENABLE_LE_PERIPHERAL 3466 hci_stack->le_advertisements_active = false; 3467 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3468 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3469 } 3470 if (hci_stack->le_advertisements_data != NULL){ 3471 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3472 } 3473 #endif 3474 } 3475 3476 #ifdef ENABLE_CLASSIC 3477 /** 3478 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3479 */ 3480 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3481 // store and open remote device db 3482 hci_stack->link_key_db = link_key_db; 3483 if (hci_stack->link_key_db) { 3484 hci_stack->link_key_db->open(); 3485 } 3486 } 3487 #endif 3488 3489 void hci_init(const hci_transport_t *transport, const void *config){ 3490 3491 #ifdef HAVE_MALLOC 3492 if (!hci_stack) { 3493 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3494 } 3495 #else 3496 hci_stack = &hci_stack_static; 3497 #endif 3498 memset(hci_stack, 0, sizeof(hci_stack_t)); 3499 3500 // reference to use transport layer implementation 3501 hci_stack->hci_transport = transport; 3502 3503 // reference to used config 3504 hci_stack->config = config; 3505 3506 // setup pointer for outgoing packet buffer 3507 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3508 3509 // max acl payload size defined in config.h 3510 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3511 3512 // register packet handlers with transport 3513 transport->register_packet_handler(&packet_handler); 3514 3515 hci_stack->state = HCI_STATE_OFF; 3516 3517 // class of device 3518 hci_stack->class_of_device = 0x007a020c; // Smartphone 3519 3520 // bondable by default 3521 hci_stack->bondable = 1; 3522 3523 #ifdef ENABLE_CLASSIC 3524 // classic name 3525 hci_stack->local_name = default_classic_name; 3526 3527 // Master slave policy 3528 hci_stack->master_slave_policy = 1; 3529 3530 // Allow Role Switch 3531 hci_stack->allow_role_switch = 1; 3532 3533 // Default / minimum security level = 2 3534 hci_stack->gap_security_level = LEVEL_2; 3535 3536 // Default Security Mode 4 3537 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3538 3539 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3540 hci_stack->gap_required_encyrption_key_size = 7; 3541 3542 // Link Supervision Timeout 3543 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3544 3545 #endif 3546 3547 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3548 hci_stack->ssp_enable = 1; 3549 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3550 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3551 hci_stack->ssp_auto_accept = 1; 3552 3553 // Secure Connections: enable (requires support from Controller) 3554 hci_stack->secure_connections_enable = true; 3555 3556 // voice setting - signed 16 bit pcm data with CVSD over the air 3557 hci_stack->sco_voice_setting = 0x60; 3558 3559 #ifdef ENABLE_LE_CENTRAL 3560 // connection parameter to use for outgoing connections 3561 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3562 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3563 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3564 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3565 hci_stack->le_connection_latency = 4; // 4 3566 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3567 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3568 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3569 3570 // default LE Scanning 3571 hci_stack->le_scan_type = 0x1; // active 3572 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3573 hci_stack->le_scan_window = 0x30; // 30 ms 3574 #endif 3575 3576 #ifdef ENABLE_LE_PERIPHERAL 3577 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3578 #endif 3579 3580 // connection parameter range used to answer connection parameter update requests in l2cap 3581 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3582 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3583 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3584 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3585 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3586 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3587 3588 hci_state_reset(); 3589 } 3590 3591 void hci_deinit(void){ 3592 #ifdef HAVE_MALLOC 3593 if (hci_stack) { 3594 free(hci_stack); 3595 } 3596 #endif 3597 hci_stack = NULL; 3598 3599 #ifdef ENABLE_CLASSIC 3600 disable_l2cap_timeouts = 0; 3601 #endif 3602 } 3603 3604 /** 3605 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3606 */ 3607 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3608 hci_stack->chipset = chipset_driver; 3609 3610 // reset chipset driver - init is also called on power_up 3611 if (hci_stack->chipset && hci_stack->chipset->init){ 3612 hci_stack->chipset->init(hci_stack->config); 3613 } 3614 } 3615 3616 /** 3617 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3618 */ 3619 void hci_set_control(const btstack_control_t *hardware_control){ 3620 // references to used control implementation 3621 hci_stack->control = hardware_control; 3622 // init with transport config 3623 hardware_control->init(hci_stack->config); 3624 } 3625 3626 void hci_close(void){ 3627 3628 #ifdef ENABLE_CLASSIC 3629 // close remote device db 3630 if (hci_stack->link_key_db) { 3631 hci_stack->link_key_db->close(); 3632 } 3633 #endif 3634 3635 btstack_linked_list_iterator_t lit; 3636 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3637 while (btstack_linked_list_iterator_has_next(&lit)){ 3638 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3639 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3640 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3641 hci_shutdown_connection(connection); 3642 } 3643 3644 hci_power_control(HCI_POWER_OFF); 3645 3646 #ifdef HAVE_MALLOC 3647 free(hci_stack); 3648 #endif 3649 hci_stack = NULL; 3650 } 3651 3652 #ifdef HAVE_SCO_TRANSPORT 3653 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3654 hci_stack->sco_transport = sco_transport; 3655 sco_transport->register_packet_handler(&packet_handler); 3656 } 3657 #endif 3658 3659 #ifdef ENABLE_CLASSIC 3660 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3661 // validate ranage and set 3662 if (encryption_key_size < 7) return; 3663 if (encryption_key_size > 16) return; 3664 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3665 } 3666 3667 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3668 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3669 hci_stack->gap_security_mode = security_mode; 3670 return ERROR_CODE_SUCCESS; 3671 } else { 3672 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3673 } 3674 } 3675 3676 gap_security_mode_t gap_get_security_mode(void){ 3677 return hci_stack->gap_security_mode; 3678 } 3679 3680 void gap_set_security_level(gap_security_level_t security_level){ 3681 hci_stack->gap_security_level = security_level; 3682 } 3683 3684 gap_security_level_t gap_get_security_level(void){ 3685 if (hci_stack->gap_secure_connections_only_mode){ 3686 return LEVEL_4; 3687 } 3688 return hci_stack->gap_security_level; 3689 } 3690 3691 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3692 hci_stack->gap_minimal_service_security_level = security_level; 3693 } 3694 3695 void gap_set_secure_connections_only_mode(bool enable){ 3696 hci_stack->gap_secure_connections_only_mode = enable; 3697 } 3698 3699 bool gap_get_secure_connections_only_mode(void){ 3700 return hci_stack->gap_secure_connections_only_mode; 3701 } 3702 #endif 3703 3704 #ifdef ENABLE_CLASSIC 3705 void gap_set_class_of_device(uint32_t class_of_device){ 3706 hci_stack->class_of_device = class_of_device; 3707 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3708 hci_run(); 3709 } 3710 3711 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3712 hci_stack->default_link_policy_settings = default_link_policy_settings; 3713 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3714 hci_run(); 3715 } 3716 3717 void gap_set_allow_role_switch(bool allow_role_switch){ 3718 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3719 } 3720 3721 uint8_t hci_get_allow_role_switch(void){ 3722 return hci_stack->allow_role_switch; 3723 } 3724 3725 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3726 hci_stack->link_supervision_timeout = link_supervision_timeout; 3727 } 3728 3729 void hci_disable_l2cap_timeout_check(void){ 3730 disable_l2cap_timeouts = 1; 3731 } 3732 #endif 3733 3734 #ifndef HAVE_HOST_CONTROLLER_API 3735 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3736 void hci_set_bd_addr(bd_addr_t addr){ 3737 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3738 hci_stack->custom_bd_addr_set = 1; 3739 } 3740 #endif 3741 3742 // State-Module-Driver overview 3743 // state module low-level 3744 // HCI_STATE_OFF off close 3745 // HCI_STATE_INITIALIZING, on open 3746 // HCI_STATE_WORKING, on open 3747 // HCI_STATE_HALTING, on open 3748 // HCI_STATE_SLEEPING, off/sleep close 3749 // HCI_STATE_FALLING_ASLEEP on open 3750 3751 static int hci_power_control_on(void){ 3752 3753 // power on 3754 int err = 0; 3755 if (hci_stack->control && hci_stack->control->on){ 3756 err = (*hci_stack->control->on)(); 3757 } 3758 if (err){ 3759 log_error( "POWER_ON failed"); 3760 hci_emit_hci_open_failed(); 3761 return err; 3762 } 3763 3764 // int chipset driver 3765 if (hci_stack->chipset && hci_stack->chipset->init){ 3766 hci_stack->chipset->init(hci_stack->config); 3767 } 3768 3769 // init transport 3770 if (hci_stack->hci_transport->init){ 3771 hci_stack->hci_transport->init(hci_stack->config); 3772 } 3773 3774 // open transport 3775 err = hci_stack->hci_transport->open(); 3776 if (err){ 3777 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3778 if (hci_stack->control && hci_stack->control->off){ 3779 (*hci_stack->control->off)(); 3780 } 3781 hci_emit_hci_open_failed(); 3782 return err; 3783 } 3784 return 0; 3785 } 3786 3787 static void hci_power_control_off(void){ 3788 3789 log_info("hci_power_control_off"); 3790 3791 // close low-level device 3792 hci_stack->hci_transport->close(); 3793 3794 log_info("hci_power_control_off - hci_transport closed"); 3795 3796 // power off 3797 if (hci_stack->control && hci_stack->control->off){ 3798 (*hci_stack->control->off)(); 3799 } 3800 3801 log_info("hci_power_control_off - control closed"); 3802 3803 hci_stack->state = HCI_STATE_OFF; 3804 } 3805 3806 static void hci_power_control_sleep(void){ 3807 3808 log_info("hci_power_control_sleep"); 3809 3810 #if 0 3811 // don't close serial port during sleep 3812 3813 // close low-level device 3814 hci_stack->hci_transport->close(hci_stack->config); 3815 #endif 3816 3817 // sleep mode 3818 if (hci_stack->control && hci_stack->control->sleep){ 3819 (*hci_stack->control->sleep)(); 3820 } 3821 3822 hci_stack->state = HCI_STATE_SLEEPING; 3823 } 3824 3825 static int hci_power_control_wake(void){ 3826 3827 log_info("hci_power_control_wake"); 3828 3829 // wake on 3830 if (hci_stack->control && hci_stack->control->wake){ 3831 (*hci_stack->control->wake)(); 3832 } 3833 3834 #if 0 3835 // open low-level device 3836 int err = hci_stack->hci_transport->open(hci_stack->config); 3837 if (err){ 3838 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3839 if (hci_stack->control && hci_stack->control->off){ 3840 (*hci_stack->control->off)(); 3841 } 3842 hci_emit_hci_open_failed(); 3843 return err; 3844 } 3845 #endif 3846 3847 return 0; 3848 } 3849 3850 static void hci_power_transition_to_initializing(void){ 3851 // set up state machine 3852 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3853 hci_stack->hci_packet_buffer_reserved = false; 3854 hci_stack->state = HCI_STATE_INITIALIZING; 3855 hci_stack->substate = HCI_INIT_SEND_RESET; 3856 } 3857 3858 // returns error 3859 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3860 int err; 3861 switch (power_mode){ 3862 case HCI_POWER_ON: 3863 err = hci_power_control_on(); 3864 if (err != 0) { 3865 log_error("hci_power_control_on() error %d", err); 3866 return err; 3867 } 3868 hci_power_transition_to_initializing(); 3869 break; 3870 case HCI_POWER_OFF: 3871 // do nothing 3872 break; 3873 case HCI_POWER_SLEEP: 3874 // do nothing (with SLEEP == OFF) 3875 break; 3876 default: 3877 btstack_assert(false); 3878 break; 3879 } 3880 return ERROR_CODE_SUCCESS; 3881 } 3882 3883 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3884 switch (power_mode){ 3885 case HCI_POWER_ON: 3886 // do nothing 3887 break; 3888 case HCI_POWER_OFF: 3889 // no connections yet, just turn it off 3890 hci_power_control_off(); 3891 break; 3892 case HCI_POWER_SLEEP: 3893 // no connections yet, just turn it off 3894 hci_power_control_sleep(); 3895 break; 3896 default: 3897 btstack_assert(false); 3898 break; 3899 } 3900 return ERROR_CODE_SUCCESS; 3901 } 3902 3903 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3904 switch (power_mode){ 3905 case HCI_POWER_ON: 3906 // do nothing 3907 break; 3908 case HCI_POWER_OFF: 3909 // see hci_run 3910 hci_stack->state = HCI_STATE_HALTING; 3911 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3912 break; 3913 case HCI_POWER_SLEEP: 3914 // see hci_run 3915 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3916 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3917 break; 3918 default: 3919 btstack_assert(false); 3920 break; 3921 } 3922 return ERROR_CODE_SUCCESS; 3923 } 3924 3925 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3926 switch (power_mode){ 3927 case HCI_POWER_ON: 3928 hci_power_transition_to_initializing(); 3929 break; 3930 case HCI_POWER_OFF: 3931 // do nothing 3932 break; 3933 case HCI_POWER_SLEEP: 3934 // see hci_run 3935 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3936 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3937 break; 3938 default: 3939 btstack_assert(false); 3940 break; 3941 } 3942 return ERROR_CODE_SUCCESS; 3943 } 3944 3945 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3946 switch (power_mode){ 3947 case HCI_POWER_ON: 3948 hci_power_transition_to_initializing(); 3949 break; 3950 case HCI_POWER_OFF: 3951 // see hci_run 3952 hci_stack->state = HCI_STATE_HALTING; 3953 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3954 break; 3955 case HCI_POWER_SLEEP: 3956 // do nothing 3957 break; 3958 default: 3959 btstack_assert(false); 3960 break; 3961 } 3962 return ERROR_CODE_SUCCESS; 3963 } 3964 3965 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3966 int err; 3967 switch (power_mode){ 3968 case HCI_POWER_ON: 3969 err = hci_power_control_wake(); 3970 if (err) return err; 3971 hci_power_transition_to_initializing(); 3972 break; 3973 case HCI_POWER_OFF: 3974 hci_stack->state = HCI_STATE_HALTING; 3975 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3976 break; 3977 case HCI_POWER_SLEEP: 3978 // do nothing 3979 break; 3980 default: 3981 btstack_assert(false); 3982 break; 3983 } 3984 return ERROR_CODE_SUCCESS; 3985 } 3986 3987 int hci_power_control(HCI_POWER_MODE power_mode){ 3988 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3989 int err = 0; 3990 switch (hci_stack->state){ 3991 case HCI_STATE_OFF: 3992 err = hci_power_control_state_off(power_mode); 3993 break; 3994 case HCI_STATE_INITIALIZING: 3995 err = hci_power_control_state_initializing(power_mode); 3996 break; 3997 case HCI_STATE_WORKING: 3998 err = hci_power_control_state_working(power_mode); 3999 break; 4000 case HCI_STATE_HALTING: 4001 err = hci_power_control_state_halting(power_mode); 4002 break; 4003 case HCI_STATE_FALLING_ASLEEP: 4004 err = hci_power_control_state_falling_asleep(power_mode); 4005 break; 4006 case HCI_STATE_SLEEPING: 4007 err = hci_power_control_state_sleeping(power_mode); 4008 break; 4009 default: 4010 btstack_assert(false); 4011 break; 4012 } 4013 if (err != 0){ 4014 return err; 4015 } 4016 4017 // create internal event 4018 hci_emit_state(); 4019 4020 // trigger next/first action 4021 hci_run(); 4022 4023 return 0; 4024 } 4025 4026 4027 #ifdef ENABLE_CLASSIC 4028 4029 static void hci_update_scan_enable(void){ 4030 // 2 = page scan, 1 = inq scan 4031 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4032 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4033 hci_run(); 4034 } 4035 4036 void gap_discoverable_control(uint8_t enable){ 4037 if (enable) enable = 1; // normalize argument 4038 4039 if (hci_stack->discoverable == enable){ 4040 hci_emit_discoverable_enabled(hci_stack->discoverable); 4041 return; 4042 } 4043 4044 hci_stack->discoverable = enable; 4045 hci_update_scan_enable(); 4046 } 4047 4048 void gap_connectable_control(uint8_t enable){ 4049 if (enable) enable = 1; // normalize argument 4050 4051 // don't emit event 4052 if (hci_stack->connectable == enable) return; 4053 4054 hci_stack->connectable = enable; 4055 hci_update_scan_enable(); 4056 } 4057 #endif 4058 4059 void gap_local_bd_addr(bd_addr_t address_buffer){ 4060 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4061 } 4062 4063 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4064 static void hci_host_num_completed_packets(void){ 4065 4066 // create packet manually as arrays are not supported and num_commands should not get reduced 4067 hci_reserve_packet_buffer(); 4068 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4069 4070 uint16_t size = 0; 4071 uint16_t num_handles = 0; 4072 packet[size++] = 0x35; 4073 packet[size++] = 0x0c; 4074 size++; // skip param len 4075 size++; // skip num handles 4076 4077 // add { handle, packets } entries 4078 btstack_linked_item_t * it; 4079 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4080 hci_connection_t * connection = (hci_connection_t *) it; 4081 if (connection->num_packets_completed){ 4082 little_endian_store_16(packet, size, connection->con_handle); 4083 size += 2; 4084 little_endian_store_16(packet, size, connection->num_packets_completed); 4085 size += 2; 4086 // 4087 num_handles++; 4088 connection->num_packets_completed = 0; 4089 } 4090 } 4091 4092 packet[2] = size - 3; 4093 packet[3] = num_handles; 4094 4095 hci_stack->host_completed_packets = 0; 4096 4097 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4098 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4099 4100 // release packet buffer for synchronous transport implementations 4101 if (hci_transport_synchronous()){ 4102 hci_release_packet_buffer(); 4103 hci_emit_transport_packet_sent(); 4104 } 4105 } 4106 #endif 4107 4108 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4109 UNUSED(ds); 4110 hci_stack->substate = HCI_HALTING_CLOSE; 4111 // allow packet handlers to defer final shutdown 4112 hci_emit_state(); 4113 hci_run(); 4114 } 4115 4116 static bool hci_run_acl_fragments(void){ 4117 if (hci_stack->acl_fragmentation_total_size > 0u) { 4118 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4119 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4120 if (connection) { 4121 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4122 hci_send_acl_packet_fragments(connection); 4123 return true; 4124 } 4125 } else { 4126 // connection gone -> discard further fragments 4127 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4128 hci_stack->acl_fragmentation_total_size = 0; 4129 hci_stack->acl_fragmentation_pos = 0; 4130 } 4131 } 4132 return false; 4133 } 4134 4135 #ifdef ENABLE_CLASSIC 4136 static bool hci_run_general_gap_classic(void){ 4137 4138 // assert stack is working and classic is active 4139 if (hci_classic_supported() == false) return false; 4140 if (hci_stack->state != HCI_STATE_WORKING) return false; 4141 4142 // decline incoming connections 4143 if (hci_stack->decline_reason){ 4144 uint8_t reason = hci_stack->decline_reason; 4145 hci_stack->decline_reason = 0; 4146 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4147 return true; 4148 } 4149 4150 if (hci_stack->gap_tasks != 0){ 4151 hci_run_gap_tasks_classic(); 4152 return true; 4153 } 4154 4155 // start/stop inquiry 4156 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4157 uint8_t duration = hci_stack->inquiry_state; 4158 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4159 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4160 return true; 4161 } 4162 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4163 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4164 hci_send_cmd(&hci_inquiry_cancel); 4165 return true; 4166 } 4167 // remote name request 4168 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4169 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4170 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4171 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4172 return true; 4173 } 4174 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4175 // Local OOB data 4176 if (hci_stack->classic_read_local_oob_data){ 4177 hci_stack->classic_read_local_oob_data = false; 4178 if (hci_stack->local_supported_commands[1] & 0x10u){ 4179 hci_send_cmd(&hci_read_local_extended_oob_data); 4180 } else { 4181 hci_send_cmd(&hci_read_local_oob_data); 4182 } 4183 } 4184 #endif 4185 // pairing 4186 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4187 uint8_t state = hci_stack->gap_pairing_state; 4188 uint8_t pin_code[16]; 4189 switch (state){ 4190 case GAP_PAIRING_STATE_SEND_PIN: 4191 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4192 memset(pin_code, 0, 16); 4193 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4194 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4195 break; 4196 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4197 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4198 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4199 break; 4200 case GAP_PAIRING_STATE_SEND_PASSKEY: 4201 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4202 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4203 break; 4204 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4205 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4206 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4207 break; 4208 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4209 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4210 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4211 break; 4212 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4213 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4214 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4215 break; 4216 default: 4217 break; 4218 } 4219 return true; 4220 } 4221 return false; 4222 } 4223 #endif 4224 4225 #ifdef ENABLE_BLE 4226 static bool hci_run_general_gap_le(void){ 4227 4228 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4229 4230 if (hci_stack->state != HCI_STATE_WORKING) return false; 4231 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4232 4233 4234 // Phase 1: collect what to stop 4235 4236 bool scanning_stop = false; 4237 bool connecting_stop = false; 4238 bool advertising_stop = false; 4239 4240 #ifndef ENABLE_LE_CENTRAL 4241 UNUSED(scanning_stop); 4242 UNUSED(connecting_stop); 4243 #endif 4244 #ifndef ENABLE_LE_PERIPHERAL 4245 UNUSED(advertising_stop); 4246 #endif 4247 4248 // check if own address changes 4249 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4250 4251 // check if whitelist needs modification 4252 bool whitelist_modification_pending = false; 4253 btstack_linked_list_iterator_t lit; 4254 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4255 while (btstack_linked_list_iterator_has_next(&lit)){ 4256 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4257 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4258 whitelist_modification_pending = true; 4259 break; 4260 } 4261 } 4262 // check if resolving list needs modification 4263 bool resolving_list_modification_pending = false; 4264 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4265 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4266 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4267 resolving_list_modification_pending = true; 4268 } 4269 #endif 4270 4271 #ifdef ENABLE_LE_CENTRAL 4272 // scanning control 4273 if (hci_stack->le_scanning_active) { 4274 // stop if: 4275 // - parameter change required 4276 // - it's disabled 4277 // - whitelist change required but used for scanning 4278 // - resolving list modified 4279 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4280 if ((hci_stack->le_scanning_param_update) || 4281 !hci_stack->le_scanning_enabled || 4282 scanning_uses_whitelist || 4283 resolving_list_modification_pending){ 4284 4285 scanning_stop = true; 4286 } 4287 } 4288 #endif 4289 4290 #ifdef ENABLE_LE_CENTRAL 4291 // connecting control 4292 bool connecting_with_whitelist; 4293 switch (hci_stack->le_connecting_state){ 4294 case LE_CONNECTING_DIRECT: 4295 case LE_CONNECTING_WHITELIST: 4296 // stop connecting if: 4297 // - connecting uses white and whitelist modification pending 4298 // - if it got disabled 4299 // - resolving list modified 4300 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4301 if ((connecting_with_whitelist && whitelist_modification_pending) || 4302 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4303 resolving_list_modification_pending) { 4304 4305 connecting_stop = true; 4306 } 4307 break; 4308 default: 4309 break; 4310 } 4311 #endif 4312 4313 #ifdef ENABLE_LE_PERIPHERAL 4314 // le advertisement control 4315 if (hci_stack->le_advertisements_active){ 4316 // stop if: 4317 // - parameter change required 4318 // - random address used in advertising and changes 4319 // - it's disabled 4320 // - whitelist change required but used for advertisement filter policy 4321 // - resolving list modified 4322 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4323 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4324 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4325 if (advertising_change || 4326 (advertising_uses_random_address && random_address_change) || 4327 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4328 (advertising_uses_whitelist && whitelist_modification_pending) || 4329 resolving_list_modification_pending) { 4330 4331 advertising_stop = true; 4332 } 4333 } 4334 #endif 4335 4336 4337 // Phase 2: stop everything that should be off during modifications 4338 4339 #ifdef ENABLE_LE_CENTRAL 4340 if (scanning_stop){ 4341 hci_stack->le_scanning_active = false; 4342 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4343 return true; 4344 } 4345 #endif 4346 4347 #ifdef ENABLE_LE_CENTRAL 4348 if (connecting_stop){ 4349 hci_send_cmd(&hci_le_create_connection_cancel); 4350 return true; 4351 } 4352 #endif 4353 4354 #ifdef ENABLE_LE_PERIPHERAL 4355 if (advertising_stop){ 4356 hci_stack->le_advertisements_active = false; 4357 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4358 return true; 4359 } 4360 #endif 4361 4362 // Phase 3: modify 4363 4364 if (random_address_change){ 4365 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4366 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4367 return true; 4368 } 4369 4370 #ifdef ENABLE_LE_CENTRAL 4371 if (hci_stack->le_scanning_param_update){ 4372 hci_stack->le_scanning_param_update = false; 4373 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4374 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4375 return true; 4376 } 4377 #endif 4378 4379 #ifdef ENABLE_LE_PERIPHERAL 4380 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4381 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4382 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4383 hci_send_cmd(&hci_le_set_advertising_parameters, 4384 hci_stack->le_advertisements_interval_min, 4385 hci_stack->le_advertisements_interval_max, 4386 hci_stack->le_advertisements_type, 4387 hci_stack->le_advertisements_own_addr_type, 4388 hci_stack->le_advertisements_direct_address_type, 4389 hci_stack->le_advertisements_direct_address, 4390 hci_stack->le_advertisements_channel_map, 4391 hci_stack->le_advertisements_filter_policy); 4392 return true; 4393 } 4394 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4395 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4396 uint8_t adv_data_clean[31]; 4397 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4398 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4399 hci_stack->le_advertisements_data_len); 4400 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4401 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4402 return true; 4403 } 4404 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4405 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4406 uint8_t scan_data_clean[31]; 4407 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4408 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4409 hci_stack->le_scan_response_data_len); 4410 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4411 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4412 return true; 4413 } 4414 #endif 4415 4416 4417 #ifdef ENABLE_LE_CENTRAL 4418 // if connect with whitelist was active and is not cancelled yet, wait until next time 4419 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4420 #endif 4421 4422 // LE Whitelist Management 4423 if (whitelist_modification_pending){ 4424 // add/remove entries 4425 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4426 while (btstack_linked_list_iterator_has_next(&lit)){ 4427 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4428 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4429 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4430 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4431 return true; 4432 } 4433 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4434 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4435 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4436 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4437 return true; 4438 } 4439 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4440 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4441 btstack_memory_whitelist_entry_free(entry); 4442 } 4443 } 4444 } 4445 4446 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4447 // LE Resolving List Management 4448 if (resolving_list_supported) { 4449 uint16_t i; 4450 switch (hci_stack->le_resolving_list_state) { 4451 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4452 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4453 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4454 return true; 4455 case LE_RESOLVING_LIST_READ_SIZE: 4456 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4457 hci_send_cmd(&hci_le_read_resolving_list_size); 4458 return true; 4459 case LE_RESOLVING_LIST_SEND_CLEAR: 4460 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4461 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4462 sizeof(hci_stack->le_resolving_list_add_entries)); 4463 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4464 sizeof(hci_stack->le_resolving_list_remove_entries)); 4465 hci_send_cmd(&hci_le_clear_resolving_list); 4466 return true; 4467 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4468 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4469 uint8_t offset = i >> 3; 4470 uint8_t mask = 1 << (i & 7); 4471 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4472 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4473 bd_addr_t peer_identity_addreses; 4474 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4475 sm_key_t peer_irk; 4476 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4477 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4478 4479 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4480 // trigger whitelist entry 'update' (work around for controller bug) 4481 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4482 while (btstack_linked_list_iterator_has_next(&lit)) { 4483 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4484 if (entry->address_type != peer_identity_addr_type) continue; 4485 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4486 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4487 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4488 } 4489 #endif 4490 4491 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4492 peer_identity_addreses); 4493 return true; 4494 } 4495 4496 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4497 4498 /* fall through */ 4499 4500 case LE_RESOLVING_LIST_ADD_ENTRIES: 4501 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4502 uint8_t offset = i >> 3; 4503 uint8_t mask = 1 << (i & 7); 4504 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4505 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4506 bd_addr_t peer_identity_addreses; 4507 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4508 sm_key_t peer_irk; 4509 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4510 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4511 const uint8_t *local_irk = gap_get_persistent_irk(); 4512 // command uses format specifier 'P' that stores 16-byte value without flip 4513 uint8_t local_irk_flipped[16]; 4514 uint8_t peer_irk_flipped[16]; 4515 reverse_128(local_irk, local_irk_flipped); 4516 reverse_128(peer_irk, peer_irk_flipped); 4517 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4518 peer_irk_flipped, local_irk_flipped); 4519 return true; 4520 } 4521 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4522 break; 4523 4524 default: 4525 break; 4526 } 4527 } 4528 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4529 #endif 4530 4531 // Phase 4: restore state 4532 4533 #ifdef ENABLE_LE_CENTRAL 4534 // re-start scanning 4535 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4536 hci_stack->le_scanning_active = true; 4537 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4538 return true; 4539 } 4540 #endif 4541 4542 #ifdef ENABLE_LE_CENTRAL 4543 // re-start connecting 4544 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4545 bd_addr_t null_addr; 4546 memset(null_addr, 0, 6); 4547 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4548 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4549 hci_send_cmd(&hci_le_create_connection, 4550 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4551 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4552 1, // use whitelist 4553 0, // peer address type 4554 null_addr, // peer bd addr 4555 hci_stack->le_connection_own_addr_type, // our addr type: 4556 hci_stack->le_connection_interval_min, // conn interval min 4557 hci_stack->le_connection_interval_max, // conn interval max 4558 hci_stack->le_connection_latency, // conn latency 4559 hci_stack->le_supervision_timeout, // conn latency 4560 hci_stack->le_minimum_ce_length, // min ce length 4561 hci_stack->le_maximum_ce_length // max ce length 4562 ); 4563 return true; 4564 } 4565 #endif 4566 4567 #ifdef ENABLE_LE_PERIPHERAL 4568 // re-start advertising 4569 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4570 // check if advertisements should be enabled given 4571 hci_stack->le_advertisements_active = true; 4572 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4573 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4574 return true; 4575 } 4576 #endif 4577 4578 return false; 4579 } 4580 #endif 4581 4582 static bool hci_run_general_pending_commands(void){ 4583 btstack_linked_item_t * it; 4584 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4585 hci_connection_t * connection = (hci_connection_t *) it; 4586 4587 switch(connection->state){ 4588 case SEND_CREATE_CONNECTION: 4589 switch(connection->address_type){ 4590 #ifdef ENABLE_CLASSIC 4591 case BD_ADDR_TYPE_ACL: 4592 log_info("sending hci_create_connection"); 4593 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4594 break; 4595 #endif 4596 default: 4597 #ifdef ENABLE_BLE 4598 #ifdef ENABLE_LE_CENTRAL 4599 log_info("sending hci_le_create_connection"); 4600 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4601 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4602 hci_send_cmd(&hci_le_create_connection, 4603 hci_stack->le_connection_scan_interval, // conn scan interval 4604 hci_stack->le_connection_scan_window, // conn scan windows 4605 0, // don't use whitelist 4606 connection->address_type, // peer address type 4607 connection->address, // peer bd addr 4608 hci_stack->le_connection_own_addr_type, // our addr type: 4609 hci_stack->le_connection_interval_min, // conn interval min 4610 hci_stack->le_connection_interval_max, // conn interval max 4611 hci_stack->le_connection_latency, // conn latency 4612 hci_stack->le_supervision_timeout, // conn latency 4613 hci_stack->le_minimum_ce_length, // min ce length 4614 hci_stack->le_maximum_ce_length // max ce length 4615 ); 4616 connection->state = SENT_CREATE_CONNECTION; 4617 #endif 4618 #endif 4619 break; 4620 } 4621 return true; 4622 4623 #ifdef ENABLE_CLASSIC 4624 case RECEIVED_CONNECTION_REQUEST: 4625 connection->role = HCI_ROLE_SLAVE; 4626 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4627 log_info("sending hci_accept_connection_request"); 4628 connection->state = ACCEPTED_CONNECTION_REQUEST; 4629 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4630 } 4631 return true; 4632 #endif 4633 4634 #ifdef ENABLE_BLE 4635 #ifdef ENABLE_LE_CENTRAL 4636 case SEND_CANCEL_CONNECTION: 4637 connection->state = SENT_CANCEL_CONNECTION; 4638 hci_send_cmd(&hci_le_create_connection_cancel); 4639 return true; 4640 #endif 4641 #endif 4642 case SEND_DISCONNECT: 4643 connection->state = SENT_DISCONNECT; 4644 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4645 return true; 4646 4647 default: 4648 break; 4649 } 4650 4651 // no further commands if connection is about to get shut down 4652 if (connection->state == SENT_DISCONNECT) continue; 4653 4654 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4655 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4656 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4657 return true; 4658 } 4659 4660 #ifdef ENABLE_CLASSIC 4661 4662 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4663 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4664 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4665 return true; 4666 } 4667 4668 // Handling link key request requires remote supported features 4669 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4670 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4671 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4672 4673 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4674 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4675 if (have_link_key && security_level_sufficient){ 4676 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4677 } else { 4678 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4679 } 4680 return true; 4681 } 4682 4683 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4684 log_info("denying to pin request"); 4685 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4686 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4687 return true; 4688 } 4689 4690 // security assessment requires remote features 4691 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4692 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4693 hci_ssp_assess_security_on_io_cap_request(connection); 4694 // 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 4695 } 4696 4697 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4698 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4699 // set authentication requirements: 4700 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4701 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4702 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4703 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4704 authreq |= 1; 4705 } 4706 bool bonding = hci_stack->bondable; 4707 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4708 // if we have received IO Cap Response, we're in responder role 4709 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4710 if (bonding && !remote_bonding){ 4711 log_info("Remote not bonding, dropping local flag"); 4712 bonding = false; 4713 } 4714 } 4715 if (bonding){ 4716 if (connection->bonding_flags & BONDING_DEDICATED){ 4717 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4718 } else { 4719 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4720 } 4721 } 4722 uint8_t have_oob_data = 0; 4723 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4724 if (connection->classic_oob_c_192 != NULL){ 4725 have_oob_data |= 1; 4726 } 4727 if (connection->classic_oob_c_256 != NULL){ 4728 have_oob_data |= 2; 4729 } 4730 #endif 4731 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4732 return true; 4733 } 4734 4735 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4736 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4737 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4738 return true; 4739 } 4740 4741 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4742 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4743 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4744 const uint8_t zero[16] = { 0 }; 4745 const uint8_t * r_192 = zero; 4746 const uint8_t * c_192 = zero; 4747 const uint8_t * r_256 = zero; 4748 const uint8_t * c_256 = zero; 4749 // verify P-256 OOB 4750 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4751 c_256 = connection->classic_oob_c_256; 4752 if (connection->classic_oob_r_256 != NULL) { 4753 r_256 = connection->classic_oob_r_256; 4754 } 4755 } 4756 // verify P-192 OOB 4757 if ((connection->classic_oob_c_192 != NULL)) { 4758 c_192 = connection->classic_oob_c_192; 4759 if (connection->classic_oob_r_192 != NULL) { 4760 r_192 = connection->classic_oob_r_192; 4761 } 4762 } 4763 4764 // assess security 4765 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4766 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4767 if (need_level_4 && !can_reach_level_4){ 4768 log_info("Level 4 required, but not possible -> abort"); 4769 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4770 // send oob negative reply 4771 c_256 = NULL; 4772 c_192 = NULL; 4773 } 4774 4775 // Reply 4776 if (c_256 != zero) { 4777 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4778 } else if (c_192 != zero){ 4779 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4780 } else { 4781 hci_stack->classic_oob_con_handle = connection->con_handle; 4782 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4783 } 4784 return true; 4785 } 4786 #endif 4787 4788 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4789 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4790 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4791 return true; 4792 } 4793 4794 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4795 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4796 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4797 return true; 4798 } 4799 4800 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4801 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4802 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4803 return true; 4804 } 4805 4806 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4807 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4808 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4809 connection->state = SENT_DISCONNECT; 4810 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4811 return true; 4812 } 4813 4814 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4815 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4816 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4817 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4818 return true; 4819 } 4820 4821 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4822 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4823 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4824 return true; 4825 } 4826 4827 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4828 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4829 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4830 return true; 4831 } 4832 4833 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4834 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4835 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4836 return true; 4837 } 4838 4839 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4840 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4841 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4842 return true; 4843 } 4844 4845 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4846 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4847 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4848 return true; 4849 } 4850 #endif 4851 4852 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4853 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4854 #ifdef ENABLE_CLASSIC 4855 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4856 #endif 4857 if (connection->state != SENT_DISCONNECT){ 4858 connection->state = SENT_DISCONNECT; 4859 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4860 return true; 4861 } 4862 } 4863 4864 #ifdef ENABLE_CLASSIC 4865 uint16_t sniff_min_interval; 4866 switch (connection->sniff_min_interval){ 4867 case 0: 4868 break; 4869 case 0xffff: 4870 connection->sniff_min_interval = 0; 4871 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4872 return true; 4873 default: 4874 sniff_min_interval = connection->sniff_min_interval; 4875 connection->sniff_min_interval = 0; 4876 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4877 return true; 4878 } 4879 4880 if (connection->sniff_subrating_max_latency != 0xffff){ 4881 uint16_t max_latency = connection->sniff_subrating_max_latency; 4882 connection->sniff_subrating_max_latency = 0; 4883 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4884 return true; 4885 } 4886 4887 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4888 uint8_t service_type = (uint8_t) connection->qos_service_type; 4889 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4890 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); 4891 return true; 4892 } 4893 4894 if (connection->request_role != HCI_ROLE_INVALID){ 4895 hci_role_t role = connection->request_role; 4896 connection->request_role = HCI_ROLE_INVALID; 4897 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4898 return true; 4899 } 4900 #endif 4901 4902 #ifdef ENABLE_BLE 4903 switch (connection->le_con_parameter_update_state){ 4904 // response to L2CAP CON PARAMETER UPDATE REQUEST 4905 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4906 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4907 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4908 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4909 0x0000, 0xffff); 4910 return true; 4911 case CON_PARAMETER_UPDATE_REPLY: 4912 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4913 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4914 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4915 0x0000, 0xffff); 4916 return true; 4917 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4918 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4919 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4920 return true; 4921 default: 4922 break; 4923 } 4924 if (connection->le_phy_update_all_phys != 0xffu){ 4925 uint8_t all_phys = connection->le_phy_update_all_phys; 4926 connection->le_phy_update_all_phys = 0xff; 4927 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); 4928 return true; 4929 } 4930 #endif 4931 } 4932 return false; 4933 } 4934 4935 static void hci_run(void){ 4936 4937 bool done; 4938 4939 // send continuation fragments first, as they block the prepared packet buffer 4940 done = hci_run_acl_fragments(); 4941 if (done) return; 4942 4943 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4944 // send host num completed packets next as they don't require num_cmd_packets > 0 4945 if (!hci_can_send_comand_packet_transport()) return; 4946 if (hci_stack->host_completed_packets){ 4947 hci_host_num_completed_packets(); 4948 return; 4949 } 4950 #endif 4951 4952 if (!hci_can_send_command_packet_now()) return; 4953 4954 // global/non-connection oriented commands 4955 4956 4957 #ifdef ENABLE_CLASSIC 4958 // general gap classic 4959 done = hci_run_general_gap_classic(); 4960 if (done) return; 4961 #endif 4962 4963 #ifdef ENABLE_BLE 4964 // general gap le 4965 done = hci_run_general_gap_le(); 4966 if (done) return; 4967 #endif 4968 4969 // send pending HCI commands 4970 done = hci_run_general_pending_commands(); 4971 if (done) return; 4972 4973 // stack state sub statemachines 4974 hci_connection_t * connection; 4975 switch (hci_stack->state){ 4976 case HCI_STATE_INITIALIZING: 4977 hci_initializing_run(); 4978 break; 4979 4980 case HCI_STATE_HALTING: 4981 4982 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4983 switch (hci_stack->substate){ 4984 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4985 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4986 4987 #ifdef ENABLE_BLE 4988 #ifdef ENABLE_LE_CENTRAL 4989 // free whitelist entries 4990 { 4991 btstack_linked_list_iterator_t lit; 4992 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4993 while (btstack_linked_list_iterator_has_next(&lit)){ 4994 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4995 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4996 btstack_memory_whitelist_entry_free(entry); 4997 } 4998 } 4999 #endif 5000 #endif 5001 // close all open connections 5002 connection = (hci_connection_t *) hci_stack->connections; 5003 if (connection){ 5004 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5005 if (!hci_can_send_command_packet_now()) return; 5006 5007 // check state 5008 if (connection->state == SENT_DISCONNECT) return; 5009 connection->state = SENT_DISCONNECT; 5010 5011 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5012 5013 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5014 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5015 5016 // ... which would be ignored anyway as we shutdown (free) the connection now 5017 hci_shutdown_connection(connection); 5018 5019 // finally, send the disconnect command 5020 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5021 return; 5022 } 5023 5024 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5025 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5026 log_info("HCI_STATE_HALTING: wait 50 ms"); 5027 hci_stack->substate = HCI_HALTING_W4_TIMER; 5028 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5029 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5030 btstack_run_loop_add_timer(&hci_stack->timeout); 5031 break; 5032 } 5033 5034 /* fall through */ 5035 5036 case HCI_HALTING_CLOSE: 5037 log_info("HCI_STATE_HALTING, calling off"); 5038 5039 // switch mode 5040 hci_power_control_off(); 5041 5042 log_info("HCI_STATE_HALTING, emitting state"); 5043 hci_emit_state(); 5044 log_info("HCI_STATE_HALTING, done"); 5045 break; 5046 5047 case HCI_HALTING_W4_TIMER: 5048 // keep waiting 5049 5050 break; 5051 default: 5052 break; 5053 } 5054 5055 break; 5056 5057 case HCI_STATE_FALLING_ASLEEP: 5058 switch(hci_stack->substate) { 5059 case HCI_FALLING_ASLEEP_DISCONNECT: 5060 log_info("HCI_STATE_FALLING_ASLEEP"); 5061 // close all open connections 5062 connection = (hci_connection_t *) hci_stack->connections; 5063 if (connection){ 5064 5065 // send disconnect 5066 if (!hci_can_send_command_packet_now()) return; 5067 5068 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5069 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5070 5071 // send disconnected event right away - causes higher layer connections to get closed, too. 5072 hci_shutdown_connection(connection); 5073 return; 5074 } 5075 5076 if (hci_classic_supported()){ 5077 // disable page and inquiry scan 5078 if (!hci_can_send_command_packet_now()) return; 5079 5080 log_info("HCI_STATE_HALTING, disabling inq scans"); 5081 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5082 5083 // continue in next sub state 5084 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5085 break; 5086 } 5087 5088 /* fall through */ 5089 5090 case HCI_FALLING_ASLEEP_COMPLETE: 5091 log_info("HCI_STATE_HALTING, calling sleep"); 5092 // switch mode 5093 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5094 hci_emit_state(); 5095 break; 5096 5097 default: 5098 break; 5099 } 5100 break; 5101 5102 default: 5103 break; 5104 } 5105 } 5106 5107 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5108 // house-keeping 5109 5110 #ifdef ENABLE_CLASSIC 5111 bd_addr_t addr; 5112 hci_connection_t * conn; 5113 #endif 5114 #ifdef ENABLE_LE_CENTRAL 5115 uint8_t initiator_filter_policy; 5116 #endif 5117 5118 uint16_t opcode = little_endian_read_16(packet, 0); 5119 switch (opcode) { 5120 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5121 hci_stack->loopback_mode = packet[3]; 5122 break; 5123 5124 #ifdef ENABLE_CLASSIC 5125 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5126 reverse_bd_addr(&packet[3], addr); 5127 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5128 5129 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5130 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5131 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5132 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5133 } 5134 5135 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5136 if (!conn) { 5137 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5138 if (!conn) { 5139 // notify client that alloc failed 5140 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5141 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5142 } 5143 conn->state = SEND_CREATE_CONNECTION; 5144 conn->role = HCI_ROLE_MASTER; 5145 } 5146 5147 conn->con_handle = HCI_CON_HANDLE_INVALID; 5148 conn->role = HCI_ROLE_INVALID; 5149 5150 log_info("conn state %u", conn->state); 5151 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5152 switch (conn->state) { 5153 // if connection active exists 5154 case OPEN: 5155 // and OPEN, emit connection complete command 5156 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5157 // packet not sent to controller 5158 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5159 case RECEIVED_DISCONNECTION_COMPLETE: 5160 // create connection triggered in disconnect complete event, let's do it now 5161 break; 5162 case SEND_CREATE_CONNECTION: 5163 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5164 break; 5165 default: 5166 // otherwise, just ignore as it is already in the open process 5167 // packet not sent to controller 5168 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5169 } 5170 conn->state = SENT_CREATE_CONNECTION; 5171 5172 // track outgoing connection 5173 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5174 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5175 break; 5176 5177 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5178 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5179 // setup_synchronous_connection? Voice setting at offset 22 5180 // TODO: compare to current setting if sco connection already active 5181 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5182 break; 5183 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5184 // accept_synchronous_connection? Voice setting at offset 18 5185 // TODO: compare to current setting if sco connection already active 5186 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5187 break; 5188 #endif 5189 #endif 5190 5191 #ifdef ENABLE_BLE 5192 #ifdef ENABLE_LE_CENTRAL 5193 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5194 // white list used? 5195 initiator_filter_policy = packet[7]; 5196 switch (initiator_filter_policy) { 5197 case 0: 5198 // whitelist not used 5199 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5200 break; 5201 case 1: 5202 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5203 break; 5204 default: 5205 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5206 break; 5207 } 5208 // track outgoing connection 5209 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5210 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5211 break; 5212 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5213 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5214 break; 5215 #endif 5216 #endif 5217 default: 5218 break; 5219 } 5220 5221 hci_stack->num_cmd_packets--; 5222 5223 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5224 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5225 if (err != 0){ 5226 return ERROR_CODE_HARDWARE_FAILURE; 5227 } 5228 return ERROR_CODE_SUCCESS; 5229 } 5230 5231 // disconnect because of security block 5232 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5233 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5234 if (!connection) return; 5235 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5236 } 5237 5238 5239 // Configure Secure Simple Pairing 5240 5241 #ifdef ENABLE_CLASSIC 5242 5243 // enable will enable SSP during init 5244 void gap_ssp_set_enable(int enable){ 5245 hci_stack->ssp_enable = enable; 5246 } 5247 5248 static int hci_local_ssp_activated(void){ 5249 return gap_ssp_supported() && hci_stack->ssp_enable; 5250 } 5251 5252 // if set, BTstack will respond to io capability request using authentication requirement 5253 void gap_ssp_set_io_capability(int io_capability){ 5254 hci_stack->ssp_io_capability = io_capability; 5255 } 5256 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5257 hci_stack->ssp_authentication_requirement = authentication_requirement; 5258 } 5259 5260 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5261 void gap_ssp_set_auto_accept(int auto_accept){ 5262 hci_stack->ssp_auto_accept = auto_accept; 5263 } 5264 5265 void gap_secure_connections_enable(bool enable){ 5266 hci_stack->secure_connections_enable = enable; 5267 } 5268 5269 #endif 5270 5271 // va_list part of hci_send_cmd 5272 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5273 if (!hci_can_send_command_packet_now()){ 5274 log_error("hci_send_cmd called but cannot send packet now"); 5275 return ERROR_CODE_COMMAND_DISALLOWED; 5276 } 5277 5278 // for HCI INITIALIZATION 5279 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5280 hci_stack->last_cmd_opcode = cmd->opcode; 5281 5282 hci_reserve_packet_buffer(); 5283 uint8_t * packet = hci_stack->hci_packet_buffer; 5284 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5285 uint8_t status = hci_send_cmd_packet(packet, size); 5286 5287 // release packet buffer on error or for synchronous transport implementations 5288 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5289 hci_release_packet_buffer(); 5290 hci_emit_transport_packet_sent(); 5291 } 5292 5293 return status; 5294 } 5295 5296 /** 5297 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5298 */ 5299 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5300 va_list argptr; 5301 va_start(argptr, cmd); 5302 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5303 va_end(argptr); 5304 return status; 5305 } 5306 5307 // Create various non-HCI events. 5308 // TODO: generalize, use table similar to hci_create_command 5309 5310 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5311 // dump packet 5312 if (dump) { 5313 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5314 } 5315 5316 // dispatch to all event handlers 5317 btstack_linked_list_iterator_t it; 5318 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5319 while (btstack_linked_list_iterator_has_next(&it)){ 5320 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5321 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5322 } 5323 } 5324 5325 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5326 if (!hci_stack->acl_packet_handler) return; 5327 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5328 } 5329 5330 #ifdef ENABLE_CLASSIC 5331 static void hci_notify_if_sco_can_send_now(void){ 5332 // notify SCO sender if waiting 5333 if (!hci_stack->sco_waiting_for_can_send_now) return; 5334 if (hci_can_send_sco_packet_now()){ 5335 hci_stack->sco_waiting_for_can_send_now = 0; 5336 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5337 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5338 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5339 } 5340 } 5341 5342 // parsing end emitting has been merged to reduce code size 5343 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5344 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5345 5346 uint8_t * eir_data; 5347 ad_context_t context; 5348 const uint8_t * name; 5349 uint8_t name_len; 5350 5351 if (size < 3) return; 5352 5353 int event_type = hci_event_packet_get_type(packet); 5354 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5355 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5356 5357 switch (event_type){ 5358 case HCI_EVENT_INQUIRY_RESULT: 5359 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5360 if (size != (3 + (num_responses * 14))) return; 5361 break; 5362 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5363 if (size != 257) return; 5364 if (num_responses != 1) return; 5365 break; 5366 default: 5367 return; 5368 } 5369 5370 // event[1] is set at the end 5371 int i; 5372 for (i=0; i<num_responses;i++){ 5373 memset(event, 0, sizeof(event)); 5374 event[0] = GAP_EVENT_INQUIRY_RESULT; 5375 uint8_t event_size = 27; // if name is not set by EIR 5376 5377 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5378 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5379 (void)memcpy(&event[9], 5380 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5381 3); // class of device 5382 (void)memcpy(&event[12], 5383 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5384 2); // clock offset 5385 5386 switch (event_type){ 5387 case HCI_EVENT_INQUIRY_RESULT: 5388 // 14,15,16,17 = 0, size 18 5389 break; 5390 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5391 event[14] = 1; 5392 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5393 // 16,17 = 0, size 18 5394 break; 5395 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5396 event[14] = 1; 5397 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5398 // EIR packets only contain a single inquiry response 5399 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5400 name = NULL; 5401 // Iterate over EIR data 5402 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5403 uint8_t data_type = ad_iterator_get_data_type(&context); 5404 uint8_t data_size = ad_iterator_get_data_len(&context); 5405 const uint8_t * data = ad_iterator_get_data(&context); 5406 // Prefer Complete Local Name over Shortened Local Name 5407 switch (data_type){ 5408 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5409 if (name) continue; 5410 /* fall through */ 5411 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5412 name = data; 5413 name_len = data_size; 5414 break; 5415 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5416 if (data_size != 8) break; 5417 event[16] = 1; 5418 memcpy(&event[17], data, 8); 5419 break; 5420 default: 5421 break; 5422 } 5423 } 5424 if (name){ 5425 event[25] = 1; 5426 // truncate name if needed 5427 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5428 event[26] = len; 5429 (void)memcpy(&event[27], name, len); 5430 event_size += len; 5431 } 5432 break; 5433 default: 5434 return; 5435 } 5436 event[1] = event_size - 2; 5437 hci_emit_event(event, event_size, 1); 5438 } 5439 } 5440 #endif 5441 5442 void hci_emit_state(void){ 5443 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5444 uint8_t event[3]; 5445 event[0] = BTSTACK_EVENT_STATE; 5446 event[1] = sizeof(event) - 2u; 5447 event[2] = hci_stack->state; 5448 hci_emit_event(event, sizeof(event), 1); 5449 } 5450 5451 #ifdef ENABLE_CLASSIC 5452 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5453 uint8_t event[13]; 5454 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5455 event[1] = sizeof(event) - 2; 5456 event[2] = status; 5457 little_endian_store_16(event, 3, con_handle); 5458 reverse_bd_addr(address, &event[5]); 5459 event[11] = 1; // ACL connection 5460 event[12] = 0; // encryption disabled 5461 hci_emit_event(event, sizeof(event), 1); 5462 } 5463 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5464 if (disable_l2cap_timeouts) return; 5465 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5466 uint8_t event[4]; 5467 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5468 event[1] = sizeof(event) - 2; 5469 little_endian_store_16(event, 2, conn->con_handle); 5470 hci_emit_event(event, sizeof(event), 1); 5471 } 5472 #endif 5473 5474 #ifdef ENABLE_BLE 5475 #ifdef ENABLE_LE_CENTRAL 5476 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){ 5477 uint8_t event[21]; 5478 event[0] = HCI_EVENT_LE_META; 5479 event[1] = sizeof(event) - 2u; 5480 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5481 event[3] = status; 5482 little_endian_store_16(event, 4, con_handle); 5483 event[6] = 0; // TODO: role 5484 event[7] = address_type; 5485 reverse_bd_addr(address, &event[8]); 5486 little_endian_store_16(event, 14, 0); // interval 5487 little_endian_store_16(event, 16, 0); // latency 5488 little_endian_store_16(event, 18, 0); // supervision timeout 5489 event[20] = 0; // master clock accuracy 5490 hci_emit_event(event, sizeof(event), 1); 5491 } 5492 #endif 5493 #endif 5494 5495 static void hci_emit_transport_packet_sent(void){ 5496 // notify upper stack that it might be possible to send again 5497 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5498 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5499 } 5500 5501 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5502 uint8_t event[6]; 5503 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5504 event[1] = sizeof(event) - 2u; 5505 event[2] = 0; // status = OK 5506 little_endian_store_16(event, 3, con_handle); 5507 event[5] = reason; 5508 hci_emit_event(event, sizeof(event), 1); 5509 } 5510 5511 static void hci_emit_nr_connections_changed(void){ 5512 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5513 uint8_t event[3]; 5514 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5515 event[1] = sizeof(event) - 2u; 5516 event[2] = nr_hci_connections(); 5517 hci_emit_event(event, sizeof(event), 1); 5518 } 5519 5520 static void hci_emit_hci_open_failed(void){ 5521 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5522 uint8_t event[2]; 5523 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5524 event[1] = sizeof(event) - 2u; 5525 hci_emit_event(event, sizeof(event), 1); 5526 } 5527 5528 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5529 log_info("hci_emit_dedicated_bonding_result %u ", status); 5530 uint8_t event[9]; 5531 int pos = 0; 5532 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5533 event[pos++] = sizeof(event) - 2u; 5534 event[pos++] = status; 5535 reverse_bd_addr(address, &event[pos]); 5536 hci_emit_event(event, sizeof(event), 1); 5537 } 5538 5539 5540 #ifdef ENABLE_CLASSIC 5541 5542 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5543 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5544 uint8_t event[5]; 5545 int pos = 0; 5546 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5547 event[pos++] = sizeof(event) - 2; 5548 little_endian_store_16(event, 2, con_handle); 5549 pos += 2; 5550 event[pos++] = level; 5551 hci_emit_event(event, sizeof(event), 1); 5552 } 5553 5554 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5555 if (!connection) return LEVEL_0; 5556 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5557 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5558 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5559 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5560 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5561 // LEVEL 4 always requires 128 bit encrytion key size 5562 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5563 security_level = LEVEL_3; 5564 } 5565 return security_level; 5566 } 5567 5568 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5569 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5570 uint8_t event[3]; 5571 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5572 event[1] = sizeof(event) - 2; 5573 event[2] = enabled; 5574 hci_emit_event(event, sizeof(event), 1); 5575 } 5576 5577 // query if remote side supports eSCO 5578 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5579 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5580 if (!connection) return false; 5581 return (connection->remote_supported_features[0] & 1) != 0; 5582 } 5583 5584 static bool hci_ssp_supported(hci_connection_t * connection){ 5585 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5586 return (connection->bonding_flags & mask) == mask; 5587 } 5588 5589 // query if remote side supports SSP 5590 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5591 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5592 if (!connection) return false; 5593 return hci_ssp_supported(connection) ? 1 : 0; 5594 } 5595 5596 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5597 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5598 } 5599 5600 /** 5601 * Check if remote supported features query has completed 5602 */ 5603 bool hci_remote_features_available(hci_con_handle_t handle){ 5604 hci_connection_t * connection = hci_connection_for_handle(handle); 5605 if (!connection) return false; 5606 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5607 } 5608 5609 /** 5610 * Trigger remote supported features query 5611 */ 5612 void hci_remote_features_query(hci_con_handle_t con_handle){ 5613 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5614 if (!connection) return; 5615 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) != 0) return; 5616 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5617 hci_run(); 5618 } 5619 5620 // GAP API 5621 /** 5622 * @bbrief enable/disable bonding. default is enabled 5623 * @praram enabled 5624 */ 5625 void gap_set_bondable_mode(int enable){ 5626 hci_stack->bondable = enable ? 1 : 0; 5627 } 5628 /** 5629 * @brief Get bondable mode. 5630 * @return 1 if bondable 5631 */ 5632 int gap_get_bondable_mode(void){ 5633 return hci_stack->bondable; 5634 } 5635 5636 /** 5637 * @brief map link keys to security levels 5638 */ 5639 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5640 switch (link_key_type){ 5641 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5642 return LEVEL_4; 5643 case COMBINATION_KEY: 5644 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5645 return LEVEL_3; 5646 default: 5647 return LEVEL_2; 5648 } 5649 } 5650 5651 /** 5652 * @brief map link keys to secure connection yes/no 5653 */ 5654 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5655 switch (link_key_type){ 5656 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5657 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5658 return 1; 5659 default: 5660 return 0; 5661 } 5662 } 5663 5664 /** 5665 * @brief map link keys to authenticated 5666 */ 5667 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5668 switch (link_key_type){ 5669 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5670 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5671 return 1; 5672 default: 5673 return 0; 5674 } 5675 } 5676 5677 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5678 log_info("gap_mitm_protection_required_for_security_level %u", level); 5679 return level > LEVEL_2; 5680 } 5681 5682 /** 5683 * @brief get current security level 5684 */ 5685 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5686 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5687 if (!connection) return LEVEL_0; 5688 return gap_security_level_for_connection(connection); 5689 } 5690 5691 /** 5692 * @brief request connection to device to 5693 * @result GAP_AUTHENTICATION_RESULT 5694 */ 5695 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5696 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5697 if (!connection){ 5698 hci_emit_security_level(con_handle, LEVEL_0); 5699 return; 5700 } 5701 5702 btstack_assert(hci_is_le_connection(connection) == false); 5703 5704 // 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) 5705 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5706 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5707 requested_level = LEVEL_4; 5708 } 5709 5710 gap_security_level_t current_level = gap_security_level(con_handle); 5711 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5712 requested_level, connection->requested_security_level, current_level); 5713 5714 // authentication active if authentication request was sent or planned level > 0 5715 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5716 if (authentication_active){ 5717 // authentication already active 5718 if (connection->requested_security_level < requested_level){ 5719 // increase requested level as new level is higher 5720 // TODO: handle re-authentication when done 5721 connection->requested_security_level = requested_level; 5722 } 5723 } else { 5724 // no request active, notify if security sufficient 5725 if (requested_level <= current_level){ 5726 hci_emit_security_level(con_handle, current_level); 5727 return; 5728 } 5729 5730 // store request 5731 connection->requested_security_level = requested_level; 5732 5733 // request remote features if not already active 5734 hci_remote_features_query(con_handle); 5735 5736 // start to authenticate connection 5737 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5738 hci_run(); 5739 } 5740 } 5741 5742 /** 5743 * @brief start dedicated bonding with device. disconnect after bonding 5744 * @param device 5745 * @param request MITM protection 5746 * @result GAP_DEDICATED_BONDING_COMPLETE 5747 */ 5748 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5749 5750 // create connection state machine 5751 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5752 5753 if (!connection){ 5754 return BTSTACK_MEMORY_ALLOC_FAILED; 5755 } 5756 5757 // delete linkn key 5758 gap_drop_link_key_for_bd_addr(device); 5759 5760 // configure LEVEL_2/3, dedicated bonding 5761 connection->state = SEND_CREATE_CONNECTION; 5762 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5763 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5764 connection->bonding_flags = BONDING_DEDICATED; 5765 5766 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5767 5768 // handle: connnection failure (connection complete != ok) 5769 // handle: authentication failure 5770 // handle: disconnect on done 5771 5772 hci_run(); 5773 5774 return 0; 5775 } 5776 5777 void gap_set_local_name(const char * local_name){ 5778 hci_stack->local_name = local_name; 5779 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5780 // also update EIR if not set by user 5781 if (hci_stack->eir_data == NULL){ 5782 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5783 } 5784 hci_run(); 5785 } 5786 #endif 5787 5788 5789 #ifdef ENABLE_BLE 5790 5791 #ifdef ENABLE_LE_CENTRAL 5792 void gap_start_scan(void){ 5793 hci_stack->le_scanning_enabled = true; 5794 hci_run(); 5795 } 5796 5797 void gap_stop_scan(void){ 5798 hci_stack->le_scanning_enabled = false; 5799 hci_run(); 5800 } 5801 5802 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5803 hci_stack->le_scan_type = scan_type; 5804 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5805 hci_stack->le_scan_interval = scan_interval; 5806 hci_stack->le_scan_window = scan_window; 5807 hci_stack->le_scanning_param_update = true; 5808 hci_run(); 5809 } 5810 5811 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5812 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5813 } 5814 5815 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5816 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5817 if (!conn){ 5818 // disallow if le connection is already outgoing 5819 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5820 log_error("le connection already active"); 5821 return ERROR_CODE_COMMAND_DISALLOWED; 5822 } 5823 5824 log_info("gap_connect: no connection exists yet, creating context"); 5825 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5826 if (!conn){ 5827 // notify client that alloc failed 5828 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5829 log_info("gap_connect: failed to alloc hci_connection_t"); 5830 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5831 } 5832 5833 // set le connecting state 5834 if (hci_is_le_connection_type(addr_type)){ 5835 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5836 } 5837 5838 conn->state = SEND_CREATE_CONNECTION; 5839 log_info("gap_connect: send create connection next"); 5840 hci_run(); 5841 return ERROR_CODE_SUCCESS; 5842 } 5843 5844 if (!hci_is_le_connection(conn) || 5845 (conn->state == SEND_CREATE_CONNECTION) || 5846 (conn->state == SENT_CREATE_CONNECTION)) { 5847 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5848 log_error("gap_connect: classic connection or connect is already being created"); 5849 return GATT_CLIENT_IN_WRONG_STATE; 5850 } 5851 5852 // check if connection was just disconnected 5853 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5854 log_info("gap_connect: send create connection (again)"); 5855 conn->state = SEND_CREATE_CONNECTION; 5856 hci_run(); 5857 return ERROR_CODE_SUCCESS; 5858 } 5859 5860 log_info("gap_connect: context exists with state %u", conn->state); 5861 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5862 hci_run(); 5863 return ERROR_CODE_SUCCESS; 5864 } 5865 5866 // @assumption: only a single outgoing LE Connection exists 5867 static hci_connection_t * gap_get_outgoing_connection(void){ 5868 btstack_linked_item_t *it; 5869 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5870 hci_connection_t * conn = (hci_connection_t *) it; 5871 if (!hci_is_le_connection(conn)) continue; 5872 switch (conn->state){ 5873 case SEND_CREATE_CONNECTION: 5874 case SENT_CREATE_CONNECTION: 5875 case SENT_CANCEL_CONNECTION: 5876 return conn; 5877 default: 5878 break; 5879 }; 5880 } 5881 return NULL; 5882 } 5883 5884 uint8_t gap_connect_cancel(void){ 5885 hci_connection_t * conn = gap_get_outgoing_connection(); 5886 if (!conn) return 0; 5887 switch (conn->state){ 5888 case SEND_CREATE_CONNECTION: 5889 // skip sending create connection and emit event instead 5890 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5891 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5892 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5893 btstack_memory_hci_connection_free( conn ); 5894 break; 5895 case SENT_CREATE_CONNECTION: 5896 // request to send cancel connection 5897 conn->state = SEND_CANCEL_CONNECTION; 5898 hci_run(); 5899 break; 5900 default: 5901 break; 5902 } 5903 return 0; 5904 } 5905 #endif 5906 5907 #ifdef ENABLE_LE_CENTRAL 5908 /** 5909 * @brief Set connection parameters for outgoing connections 5910 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5911 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5912 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5913 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5914 * @param conn_latency, default: 4 5915 * @param supervision_timeout (unit: 10ms), default: 720 ms 5916 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5917 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5918 */ 5919 5920 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5921 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5922 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5923 hci_stack->le_connection_scan_interval = conn_scan_interval; 5924 hci_stack->le_connection_scan_window = conn_scan_window; 5925 hci_stack->le_connection_interval_min = conn_interval_min; 5926 hci_stack->le_connection_interval_max = conn_interval_max; 5927 hci_stack->le_connection_latency = conn_latency; 5928 hci_stack->le_supervision_timeout = supervision_timeout; 5929 hci_stack->le_minimum_ce_length = min_ce_length; 5930 hci_stack->le_maximum_ce_length = max_ce_length; 5931 } 5932 #endif 5933 5934 /** 5935 * @brief Updates the connection parameters for a given LE connection 5936 * @param handle 5937 * @param conn_interval_min (unit: 1.25ms) 5938 * @param conn_interval_max (unit: 1.25ms) 5939 * @param conn_latency 5940 * @param supervision_timeout (unit: 10ms) 5941 * @returns 0 if ok 5942 */ 5943 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5944 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5945 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5946 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5947 connection->le_conn_interval_min = conn_interval_min; 5948 connection->le_conn_interval_max = conn_interval_max; 5949 connection->le_conn_latency = conn_latency; 5950 connection->le_supervision_timeout = supervision_timeout; 5951 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5952 hci_run(); 5953 return 0; 5954 } 5955 5956 /** 5957 * @brief Request an update of the connection parameter for a given LE connection 5958 * @param handle 5959 * @param conn_interval_min (unit: 1.25ms) 5960 * @param conn_interval_max (unit: 1.25ms) 5961 * @param conn_latency 5962 * @param supervision_timeout (unit: 10ms) 5963 * @returns 0 if ok 5964 */ 5965 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5966 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5967 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5968 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5969 connection->le_conn_interval_min = conn_interval_min; 5970 connection->le_conn_interval_max = conn_interval_max; 5971 connection->le_conn_latency = conn_latency; 5972 connection->le_supervision_timeout = supervision_timeout; 5973 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5974 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5975 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5976 return 0; 5977 } 5978 5979 #ifdef ENABLE_LE_PERIPHERAL 5980 5981 /** 5982 * @brief Set Advertisement Data 5983 * @param advertising_data_length 5984 * @param advertising_data (max 31 octets) 5985 * @note data is not copied, pointer has to stay valid 5986 */ 5987 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5988 hci_stack->le_advertisements_data_len = advertising_data_length; 5989 hci_stack->le_advertisements_data = advertising_data; 5990 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5991 hci_run(); 5992 } 5993 5994 /** 5995 * @brief Set Scan Response Data 5996 * @param advertising_data_length 5997 * @param advertising_data (max 31 octets) 5998 * @note data is not copied, pointer has to stay valid 5999 */ 6000 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6001 hci_stack->le_scan_response_data_len = scan_response_data_length; 6002 hci_stack->le_scan_response_data = scan_response_data; 6003 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6004 hci_run(); 6005 } 6006 6007 /** 6008 * @brief Set Advertisement Parameters 6009 * @param adv_int_min 6010 * @param adv_int_max 6011 * @param adv_type 6012 * @param direct_address_type 6013 * @param direct_address 6014 * @param channel_map 6015 * @param filter_policy 6016 * 6017 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6018 */ 6019 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6020 uint8_t direct_address_typ, bd_addr_t direct_address, 6021 uint8_t channel_map, uint8_t filter_policy) { 6022 6023 hci_stack->le_advertisements_interval_min = adv_int_min; 6024 hci_stack->le_advertisements_interval_max = adv_int_max; 6025 hci_stack->le_advertisements_type = adv_type; 6026 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6027 hci_stack->le_advertisements_channel_map = channel_map; 6028 hci_stack->le_advertisements_filter_policy = filter_policy; 6029 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6030 6); 6031 6032 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6033 hci_run(); 6034 } 6035 6036 /** 6037 * @brief Enable/Disable Advertisements 6038 * @param enabled 6039 */ 6040 void gap_advertisements_enable(int enabled){ 6041 hci_stack->le_advertisements_enabled = enabled != 0; 6042 hci_update_advertisements_enabled_for_current_roles(); 6043 hci_run(); 6044 } 6045 6046 #endif 6047 6048 void hci_le_set_own_address_type(uint8_t own_address_type){ 6049 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6050 if (own_address_type == hci_stack->le_own_addr_type) return; 6051 hci_stack->le_own_addr_type = own_address_type; 6052 6053 #ifdef ENABLE_LE_PERIPHERAL 6054 // update advertisement parameters, too 6055 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6056 hci_run(); 6057 #endif 6058 #ifdef ENABLE_LE_CENTRAL 6059 // note: we don't update scan parameters or modify ongoing connection attempts 6060 #endif 6061 } 6062 6063 void hci_le_random_address_set(const bd_addr_t random_address){ 6064 memcpy(hci_stack->le_random_address, random_address, 6); 6065 hci_stack->le_random_address_set = true; 6066 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6067 hci_run(); 6068 } 6069 6070 #endif 6071 6072 uint8_t gap_disconnect(hci_con_handle_t handle){ 6073 hci_connection_t * conn = hci_connection_for_handle(handle); 6074 if (!conn){ 6075 hci_emit_disconnection_complete(handle, 0); 6076 return 0; 6077 } 6078 // ignore if already disconnected 6079 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6080 return 0; 6081 } 6082 conn->state = SEND_DISCONNECT; 6083 hci_run(); 6084 return 0; 6085 } 6086 6087 int gap_read_rssi(hci_con_handle_t con_handle){ 6088 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6089 if (hci_connection == NULL) return 0; 6090 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6091 hci_run(); 6092 return 1; 6093 } 6094 6095 /** 6096 * @brief Get connection type 6097 * @param con_handle 6098 * @result connection_type 6099 */ 6100 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6101 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6102 if (!conn) return GAP_CONNECTION_INVALID; 6103 switch (conn->address_type){ 6104 case BD_ADDR_TYPE_LE_PUBLIC: 6105 case BD_ADDR_TYPE_LE_RANDOM: 6106 return GAP_CONNECTION_LE; 6107 case BD_ADDR_TYPE_SCO: 6108 return GAP_CONNECTION_SCO; 6109 case BD_ADDR_TYPE_ACL: 6110 return GAP_CONNECTION_ACL; 6111 default: 6112 return GAP_CONNECTION_INVALID; 6113 } 6114 } 6115 6116 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6117 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6118 if (!conn) return HCI_ROLE_INVALID; 6119 return (hci_role_t) conn->role; 6120 } 6121 6122 6123 #ifdef ENABLE_CLASSIC 6124 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6125 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6126 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6127 conn->request_role = role; 6128 hci_run(); 6129 return ERROR_CODE_SUCCESS; 6130 } 6131 #endif 6132 6133 #ifdef ENABLE_BLE 6134 6135 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){ 6136 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6137 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6138 6139 conn->le_phy_update_all_phys = all_phys; 6140 conn->le_phy_update_tx_phys = tx_phys; 6141 conn->le_phy_update_rx_phys = rx_phys; 6142 conn->le_phy_update_phy_options = phy_options; 6143 6144 hci_run(); 6145 6146 return 0; 6147 } 6148 6149 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6150 // check if already in list 6151 btstack_linked_list_iterator_t it; 6152 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6153 while (btstack_linked_list_iterator_has_next(&it)) { 6154 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6155 if (entry->address_type != address_type) { 6156 continue; 6157 } 6158 if (memcmp(entry->address, address, 6) != 0) { 6159 continue; 6160 } 6161 // disallow if already scheduled to add 6162 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6163 return ERROR_CODE_COMMAND_DISALLOWED; 6164 } 6165 // still on controller, but scheduled to remove -> re-add 6166 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6167 return ERROR_CODE_SUCCESS; 6168 } 6169 // alloc and add to list 6170 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6171 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6172 entry->address_type = address_type; 6173 (void)memcpy(entry->address, address, 6); 6174 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6175 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6176 return ERROR_CODE_SUCCESS; 6177 } 6178 6179 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6180 btstack_linked_list_iterator_t it; 6181 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6182 while (btstack_linked_list_iterator_has_next(&it)){ 6183 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6184 if (entry->address_type != address_type) { 6185 continue; 6186 } 6187 if (memcmp(entry->address, address, 6) != 0) { 6188 continue; 6189 } 6190 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6191 // remove from controller if already present 6192 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6193 } else { 6194 // directly remove entry from whitelist 6195 btstack_linked_list_iterator_remove(&it); 6196 btstack_memory_whitelist_entry_free(entry); 6197 } 6198 return ERROR_CODE_SUCCESS; 6199 } 6200 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6201 } 6202 6203 static void hci_whitelist_clear(void){ 6204 btstack_linked_list_iterator_t it; 6205 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6206 while (btstack_linked_list_iterator_has_next(&it)){ 6207 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6208 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6209 // remove from controller if already present 6210 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6211 continue; 6212 } 6213 // directly remove entry from whitelist 6214 btstack_linked_list_iterator_remove(&it); 6215 btstack_memory_whitelist_entry_free(entry); 6216 } 6217 } 6218 6219 /** 6220 * @brief Clear Whitelist 6221 * @returns 0 if ok 6222 */ 6223 uint8_t gap_whitelist_clear(void){ 6224 hci_whitelist_clear(); 6225 hci_run(); 6226 return ERROR_CODE_SUCCESS; 6227 } 6228 6229 /** 6230 * @brief Add Device to Whitelist 6231 * @param address_typ 6232 * @param address 6233 * @returns 0 if ok 6234 */ 6235 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6236 uint8_t status = hci_whitelist_add(address_type, address); 6237 if (status){ 6238 return status; 6239 } 6240 hci_run(); 6241 return ERROR_CODE_SUCCESS; 6242 } 6243 6244 /** 6245 * @brief Remove Device from Whitelist 6246 * @param address_typ 6247 * @param address 6248 * @returns 0 if ok 6249 */ 6250 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6251 uint8_t status = hci_whitelist_remove(address_type, address); 6252 if (status){ 6253 return status; 6254 } 6255 hci_run(); 6256 return ERROR_CODE_SUCCESS; 6257 } 6258 6259 #ifdef ENABLE_LE_CENTRAL 6260 /** 6261 * @brief Connect with Whitelist 6262 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6263 * @returns - if ok 6264 */ 6265 uint8_t gap_connect_with_whitelist(void){ 6266 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6267 return ERROR_CODE_COMMAND_DISALLOWED; 6268 } 6269 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6270 hci_run(); 6271 return ERROR_CODE_SUCCESS; 6272 } 6273 6274 /** 6275 * @brief Auto Connection Establishment - Start Connecting to device 6276 * @param address_typ 6277 * @param address 6278 * @returns 0 if ok 6279 */ 6280 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6281 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6282 return ERROR_CODE_COMMAND_DISALLOWED; 6283 } 6284 6285 uint8_t status = hci_whitelist_add(address_type, address); 6286 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6287 return status; 6288 } 6289 6290 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6291 6292 hci_run(); 6293 return ERROR_CODE_SUCCESS; 6294 } 6295 6296 /** 6297 * @brief Auto Connection Establishment - Stop Connecting to device 6298 * @param address_typ 6299 * @param address 6300 * @returns 0 if ok 6301 */ 6302 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6303 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6304 return ERROR_CODE_COMMAND_DISALLOWED; 6305 } 6306 6307 hci_whitelist_remove(address_type, address); 6308 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6309 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6310 } 6311 hci_run(); 6312 return 0; 6313 } 6314 6315 /** 6316 * @brief Auto Connection Establishment - Stop everything 6317 * @note Convenience function to stop all active auto connection attempts 6318 */ 6319 uint8_t gap_auto_connection_stop_all(void){ 6320 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6321 return ERROR_CODE_COMMAND_DISALLOWED; 6322 } 6323 hci_whitelist_clear(); 6324 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6325 hci_run(); 6326 return ERROR_CODE_SUCCESS; 6327 } 6328 6329 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6330 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6331 if (!conn) return 0; 6332 return conn->le_connection_interval; 6333 } 6334 #endif 6335 #endif 6336 6337 #ifdef ENABLE_CLASSIC 6338 /** 6339 * @brief Set Extended Inquiry Response data 6340 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6341 * @note has to be done before stack starts up 6342 */ 6343 void gap_set_extended_inquiry_response(const uint8_t * data){ 6344 hci_stack->eir_data = data; 6345 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6346 hci_run(); 6347 } 6348 6349 /** 6350 * @brief Start GAP Classic Inquiry 6351 * @param duration in 1.28s units 6352 * @return 0 if ok 6353 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6354 */ 6355 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6356 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6357 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6358 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6359 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6360 } 6361 hci_stack->inquiry_state = duration_in_1280ms_units; 6362 hci_run(); 6363 return 0; 6364 } 6365 6366 /** 6367 * @brief Stop GAP Classic Inquiry 6368 * @returns 0 if ok 6369 */ 6370 int gap_inquiry_stop(void){ 6371 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6372 // emit inquiry complete event, before it even started 6373 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6374 hci_emit_event(event, sizeof(event), 1); 6375 return 0; 6376 } 6377 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6378 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6379 hci_run(); 6380 return 0; 6381 } 6382 6383 void gap_inquiry_set_lap(uint32_t lap){ 6384 hci_stack->inquiry_lap = lap; 6385 } 6386 6387 6388 /** 6389 * @brief Remote Name Request 6390 * @param addr 6391 * @param page_scan_repetition_mode 6392 * @param clock_offset only used when bit 15 is set 6393 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6394 */ 6395 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6396 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6397 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6398 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6399 hci_stack->remote_name_clock_offset = clock_offset; 6400 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6401 hci_run(); 6402 return 0; 6403 } 6404 6405 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6406 hci_stack->gap_pairing_state = state; 6407 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6408 hci_run(); 6409 return 0; 6410 } 6411 6412 /** 6413 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6414 * @param addr 6415 * @param pin_data 6416 * @param pin_len 6417 * @return 0 if ok 6418 */ 6419 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6420 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6421 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6422 hci_stack->gap_pairing_pin_len = pin_len; 6423 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6424 } 6425 6426 /** 6427 * @brief Legacy Pairing Pin Code Response 6428 * @param addr 6429 * @param pin 6430 * @return 0 if ok 6431 */ 6432 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6433 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6434 } 6435 6436 /** 6437 * @brief Abort Legacy Pairing 6438 * @param addr 6439 * @param pin 6440 * @return 0 if ok 6441 */ 6442 int gap_pin_code_negative(bd_addr_t addr){ 6443 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6444 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6445 } 6446 6447 /** 6448 * @brief SSP Passkey Response 6449 * @param addr 6450 * @param passkey 6451 * @return 0 if ok 6452 */ 6453 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6454 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6455 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6456 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6457 } 6458 6459 /** 6460 * @brief Abort SSP Passkey Entry/Pairing 6461 * @param addr 6462 * @param pin 6463 * @return 0 if ok 6464 */ 6465 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6466 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6467 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6468 } 6469 6470 /** 6471 * @brief Accept SSP Numeric Comparison 6472 * @param addr 6473 * @param passkey 6474 * @return 0 if ok 6475 */ 6476 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6477 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6478 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6479 } 6480 6481 /** 6482 * @brief Abort SSP Numeric Comparison/Pairing 6483 * @param addr 6484 * @param pin 6485 * @return 0 if ok 6486 */ 6487 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6488 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6489 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6490 } 6491 6492 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6493 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6494 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6495 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6496 connectionSetAuthenticationFlags(conn, flag); 6497 hci_run(); 6498 return ERROR_CODE_SUCCESS; 6499 } 6500 #endif 6501 6502 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6503 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6504 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6505 } 6506 6507 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6508 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6509 } 6510 #endif 6511 6512 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6513 /** 6514 * @brief Report Remote OOB Data 6515 * @param bd_addr 6516 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6517 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6518 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6519 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6520 */ 6521 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){ 6522 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6523 if (connection == NULL) { 6524 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6525 } 6526 connection->classic_oob_c_192 = c_192; 6527 connection->classic_oob_r_192 = r_192; 6528 6529 // ignore P-256 if not supported by us 6530 if (hci_stack->secure_connections_active){ 6531 connection->classic_oob_c_256 = c_256; 6532 connection->classic_oob_r_256 = r_256; 6533 } 6534 6535 return ERROR_CODE_SUCCESS; 6536 } 6537 /** 6538 * @brief Generate new OOB data 6539 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6540 */ 6541 void gap_ssp_generate_oob_data(void){ 6542 hci_stack->classic_read_local_oob_data = true; 6543 hci_run(); 6544 } 6545 6546 #endif 6547 6548 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6549 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6550 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6551 if (connection == NULL) { 6552 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6553 } 6554 6555 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6556 connection->link_key_type = type; 6557 6558 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6559 } 6560 6561 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6562 /** 6563 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6564 * @param inquiry_mode see bluetooth_defines.h 6565 */ 6566 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6567 hci_stack->inquiry_mode = inquiry_mode; 6568 } 6569 6570 /** 6571 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6572 */ 6573 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6574 hci_stack->sco_voice_setting = voice_setting; 6575 } 6576 6577 /** 6578 * @brief Get SCO Voice Setting 6579 * @return current voice setting 6580 */ 6581 uint16_t hci_get_sco_voice_setting(void){ 6582 return hci_stack->sco_voice_setting; 6583 } 6584 6585 static int hci_have_usb_transport(void){ 6586 if (!hci_stack->hci_transport) return 0; 6587 const char * transport_name = hci_stack->hci_transport->name; 6588 if (!transport_name) return 0; 6589 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6590 } 6591 6592 /** @brief Get SCO packet length for current SCO Voice setting 6593 * @note Using SCO packets of the exact length is required for USB transfer 6594 * @return Length of SCO packets in bytes (not audio frames) 6595 */ 6596 uint16_t hci_get_sco_packet_length(void){ 6597 uint16_t sco_packet_length = 0; 6598 6599 #ifdef ENABLE_SCO_OVER_HCI 6600 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6601 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6602 6603 if (hci_have_usb_transport()){ 6604 // see Core Spec for H2 USB Transfer. 6605 // 3 byte SCO header + 24 bytes per connection 6606 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6607 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6608 } else { 6609 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6610 sco_packet_length = 3 + 60 * multiplier; 6611 // assert that it still fits inside an SCO buffer 6612 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6613 sco_packet_length = 3 + 60; 6614 } 6615 } 6616 #endif 6617 6618 #ifdef HAVE_SCO_TRANSPORT 6619 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6620 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6621 sco_packet_length = 3 + 60 * multiplier; 6622 #endif 6623 return sco_packet_length; 6624 } 6625 6626 /** 6627 * @brief Sets the master/slave policy 6628 * @param policy (0: attempt to become master, 1: let connecting device decide) 6629 */ 6630 void hci_set_master_slave_policy(uint8_t policy){ 6631 hci_stack->master_slave_policy = policy; 6632 } 6633 6634 #endif 6635 6636 HCI_STATE hci_get_state(void){ 6637 return hci_stack->state; 6638 } 6639 6640 #ifdef ENABLE_CLASSIC 6641 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6642 hci_stack->gap_classic_accept_callback = accept_callback; 6643 } 6644 #endif 6645 6646 /** 6647 * @brief Set callback for Bluetooth Hardware Error 6648 */ 6649 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6650 hci_stack->hardware_error_callback = fn; 6651 } 6652 6653 void hci_disconnect_all(void){ 6654 btstack_linked_list_iterator_t it; 6655 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6656 while (btstack_linked_list_iterator_has_next(&it)){ 6657 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6658 if (con->state == SENT_DISCONNECT) continue; 6659 con->state = SEND_DISCONNECT; 6660 } 6661 hci_run(); 6662 } 6663 6664 uint16_t hci_get_manufacturer(void){ 6665 return hci_stack->manufacturer; 6666 } 6667 6668 #ifdef ENABLE_BLE 6669 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6670 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6671 if (!hci_con) return NULL; 6672 return &hci_con->sm_connection; 6673 } 6674 6675 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6676 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6677 #endif 6678 6679 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6680 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6681 if (hci_connection == NULL) return 0; 6682 if (hci_is_le_connection(hci_connection)){ 6683 #ifdef ENABLE_BLE 6684 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6685 if (sm_conn->sm_connection_encrypted) { 6686 return sm_conn->sm_actual_encryption_key_size; 6687 } 6688 #endif 6689 } else { 6690 #ifdef ENABLE_CLASSIC 6691 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6692 return hci_connection->encryption_key_size; 6693 } 6694 #endif 6695 } 6696 return 0; 6697 } 6698 6699 int gap_authenticated(hci_con_handle_t con_handle){ 6700 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6701 if (hci_connection == NULL) return 0; 6702 6703 switch (hci_connection->address_type){ 6704 #ifdef ENABLE_BLE 6705 case BD_ADDR_TYPE_LE_PUBLIC: 6706 case BD_ADDR_TYPE_LE_RANDOM: 6707 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6708 return hci_connection->sm_connection.sm_connection_authenticated; 6709 #endif 6710 #ifdef ENABLE_CLASSIC 6711 case BD_ADDR_TYPE_SCO: 6712 case BD_ADDR_TYPE_ACL: 6713 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6714 #endif 6715 default: 6716 return 0; 6717 } 6718 } 6719 6720 int gap_secure_connection(hci_con_handle_t con_handle){ 6721 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6722 if (hci_connection == NULL) return 0; 6723 6724 switch (hci_connection->address_type){ 6725 #ifdef ENABLE_BLE 6726 case BD_ADDR_TYPE_LE_PUBLIC: 6727 case BD_ADDR_TYPE_LE_RANDOM: 6728 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6729 return hci_connection->sm_connection.sm_connection_sc; 6730 #endif 6731 #ifdef ENABLE_CLASSIC 6732 case BD_ADDR_TYPE_SCO: 6733 case BD_ADDR_TYPE_ACL: 6734 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6735 #endif 6736 default: 6737 return 0; 6738 } 6739 } 6740 6741 bool gap_bonded(hci_con_handle_t con_handle){ 6742 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6743 if (hci_connection == NULL) return 0; 6744 6745 #ifdef ENABLE_CLASSIC 6746 link_key_t link_key; 6747 link_key_type_t link_key_type; 6748 #endif 6749 switch (hci_connection->address_type){ 6750 #ifdef ENABLE_BLE 6751 case BD_ADDR_TYPE_LE_PUBLIC: 6752 case BD_ADDR_TYPE_LE_RANDOM: 6753 return hci_connection->sm_connection.sm_le_db_index >= 0; 6754 #endif 6755 #ifdef ENABLE_CLASSIC 6756 case BD_ADDR_TYPE_SCO: 6757 case BD_ADDR_TYPE_ACL: 6758 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6759 #endif 6760 default: 6761 return false; 6762 } 6763 } 6764 6765 #ifdef ENABLE_BLE 6766 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6767 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6768 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6769 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6770 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6771 return sm_conn->sm_connection_authorization_state; 6772 } 6773 #endif 6774 6775 #ifdef ENABLE_CLASSIC 6776 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){ 6777 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6778 if (!conn) return GAP_CONNECTION_INVALID; 6779 conn->sniff_min_interval = sniff_min_interval; 6780 conn->sniff_max_interval = sniff_max_interval; 6781 conn->sniff_attempt = sniff_attempt; 6782 conn->sniff_timeout = sniff_timeout; 6783 hci_run(); 6784 return 0; 6785 } 6786 6787 /** 6788 * @brief Exit Sniff mode 6789 * @param con_handle 6790 @ @return 0 if ok 6791 */ 6792 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6793 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6794 if (!conn) return GAP_CONNECTION_INVALID; 6795 conn->sniff_min_interval = 0xffff; 6796 hci_run(); 6797 return 0; 6798 } 6799 6800 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){ 6801 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6802 if (!conn) return GAP_CONNECTION_INVALID; 6803 conn->sniff_subrating_max_latency = max_latency; 6804 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6805 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6806 hci_run(); 6807 return ERROR_CODE_SUCCESS; 6808 } 6809 6810 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){ 6811 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6812 if (!conn) return GAP_CONNECTION_INVALID; 6813 conn->qos_service_type = service_type; 6814 conn->qos_token_rate = token_rate; 6815 conn->qos_peak_bandwidth = peak_bandwidth; 6816 conn->qos_latency = latency; 6817 conn->qos_delay_variation = delay_variation; 6818 hci_run(); 6819 return ERROR_CODE_SUCCESS; 6820 } 6821 6822 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6823 hci_stack->new_page_scan_interval = page_scan_interval; 6824 hci_stack->new_page_scan_window = page_scan_window; 6825 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6826 hci_run(); 6827 } 6828 6829 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6830 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6831 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6832 hci_run(); 6833 } 6834 6835 #endif 6836 6837 void hci_halting_defer(void){ 6838 if (hci_stack->state != HCI_STATE_HALTING) return; 6839 switch (hci_stack->substate){ 6840 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6841 case HCI_HALTING_CLOSE: 6842 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6843 break; 6844 default: 6845 break; 6846 } 6847 } 6848 6849 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6850 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6851 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6852 if (le_device_db_index >= le_device_db_max_count()) return; 6853 uint8_t offset = le_device_db_index >> 3; 6854 uint8_t mask = 1 << (le_device_db_index & 7); 6855 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6856 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6857 // note: go back to remove entries, otherwise, a remove + add will skip the add 6858 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6859 } 6860 } 6861 6862 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6863 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6864 if (le_device_db_index >= le_device_db_max_count()) return; 6865 uint8_t offset = le_device_db_index >> 3; 6866 uint8_t mask = 1 << (le_device_db_index & 7); 6867 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6868 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6869 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6870 } 6871 } 6872 6873 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6874 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6875 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6876 } 6877 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6878 // restart le resolving list update 6879 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6880 } 6881 return ERROR_CODE_SUCCESS; 6882 } 6883 #endif 6884 6885 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6886 void hci_setup_test_connections_fuzz(void){ 6887 hci_connection_t * conn; 6888 6889 // default address: 66:55:44:33:00:01 6890 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6891 6892 // setup Controller info 6893 hci_stack->num_cmd_packets = 255; 6894 hci_stack->acl_packets_total_num = 255; 6895 6896 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6897 addr[5] = 0x01; 6898 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6899 conn->con_handle = addr[5]; 6900 conn->role = HCI_ROLE_SLAVE; 6901 conn->state = RECEIVED_CONNECTION_REQUEST; 6902 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6903 6904 // setup incoming Classic SCO connection with con handle 0x0002 6905 addr[5] = 0x02; 6906 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6907 conn->con_handle = addr[5]; 6908 conn->role = HCI_ROLE_SLAVE; 6909 conn->state = RECEIVED_CONNECTION_REQUEST; 6910 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6911 6912 // setup ready Classic ACL connection with con handle 0x0003 6913 addr[5] = 0x03; 6914 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6915 conn->con_handle = addr[5]; 6916 conn->role = HCI_ROLE_SLAVE; 6917 conn->state = OPEN; 6918 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6919 6920 // setup ready Classic SCO connection with con handle 0x0004 6921 addr[5] = 0x04; 6922 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6923 conn->con_handle = addr[5]; 6924 conn->role = HCI_ROLE_SLAVE; 6925 conn->state = OPEN; 6926 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6927 6928 // setup ready LE ACL connection with con handle 0x005 and public address 6929 addr[5] = 0x05; 6930 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6931 conn->con_handle = addr[5]; 6932 conn->role = HCI_ROLE_SLAVE; 6933 conn->state = OPEN; 6934 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6935 conn->sm_connection.sm_connection_encrypted = 1; 6936 } 6937 6938 void hci_free_connections_fuzz(void){ 6939 btstack_linked_list_iterator_t it; 6940 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6941 while (btstack_linked_list_iterator_has_next(&it)){ 6942 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6943 btstack_linked_list_iterator_remove(&it); 6944 btstack_memory_hci_connection_free(con); 6945 } 6946 } 6947 void hci_simulate_working_fuzz(void){ 6948 hci_init_done(); 6949 hci_stack->num_cmd_packets = 255; 6950 } 6951 #endif 6952