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