1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_emit_transport_packet_sent(void); 156 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 157 static void hci_emit_nr_connections_changed(void); 158 static void hci_emit_hci_open_failed(void); 159 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 160 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 161 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 162 static void hci_run(void); 163 static int hci_is_le_connection(hci_connection_t * connection); 164 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 static void hci_init_done(void){ 1427 // done. tell the app 1428 log_info("hci_init_done -> HCI_STATE_WORKING"); 1429 hci_stack->state = HCI_STATE_WORKING; 1430 hci_emit_state(); 1431 } 1432 1433 // assumption: hci_can_send_command_packet_now() == true 1434 static void hci_initializing_run(void){ 1435 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1436 1437 #ifndef HAVE_HOST_CONTROLLER_API 1438 bool need_baud_change = hci_stack->config 1439 && hci_stack->chipset 1440 && hci_stack->chipset->set_baudrate_command 1441 && hci_stack->hci_transport->set_baudrate 1442 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1443 #endif 1444 1445 switch (hci_stack->substate){ 1446 case HCI_INIT_SEND_RESET: 1447 hci_state_reset(); 1448 1449 #ifndef HAVE_HOST_CONTROLLER_API 1450 // prepare reset if command complete not received in 100ms 1451 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1452 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1453 btstack_run_loop_add_timer(&hci_stack->timeout); 1454 #endif 1455 // send command 1456 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1457 hci_send_cmd(&hci_reset); 1458 break; 1459 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1460 hci_send_cmd(&hci_read_local_version_information); 1461 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1462 break; 1463 case HCI_INIT_SEND_READ_LOCAL_NAME: 1464 hci_send_cmd(&hci_read_local_name); 1465 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1466 break; 1467 1468 #ifndef HAVE_HOST_CONTROLLER_API 1469 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1470 hci_state_reset(); 1471 // prepare reset if command complete not received in 100ms 1472 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1473 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1474 btstack_run_loop_add_timer(&hci_stack->timeout); 1475 // send command 1476 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1477 hci_send_cmd(&hci_reset); 1478 break; 1479 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1480 hci_state_reset(); 1481 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1482 hci_send_cmd(&hci_reset); 1483 break; 1484 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1485 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1486 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1487 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1488 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1489 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1490 break; 1491 } 1492 case HCI_INIT_SET_BD_ADDR: 1493 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1494 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1495 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1496 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1497 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1498 break; 1499 case HCI_INIT_SEND_BAUD_CHANGE: 1500 if (need_baud_change) { 1501 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1502 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1503 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1504 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1505 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1506 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1507 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1508 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1509 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1510 btstack_run_loop_add_timer(&hci_stack->timeout); 1511 } 1512 break; 1513 } 1514 1515 /* fall through */ 1516 1517 case HCI_INIT_CUSTOM_INIT: 1518 // Custom initialization 1519 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1520 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1521 bool send_cmd = false; 1522 switch (hci_stack->chipset_result){ 1523 case BTSTACK_CHIPSET_VALID_COMMAND: 1524 send_cmd = true; 1525 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1526 break; 1527 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1528 send_cmd = true; 1529 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1530 log_info("CSR Warm Boot"); 1531 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1532 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1533 btstack_run_loop_add_timer(&hci_stack->timeout); 1534 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1535 && hci_stack->config 1536 && hci_stack->chipset 1537 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1538 && hci_stack->hci_transport->set_baudrate 1539 && hci_transport_uart_get_main_baud_rate()){ 1540 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1541 } else { 1542 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1543 } 1544 break; 1545 default: 1546 break; 1547 } 1548 1549 if (send_cmd){ 1550 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1551 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1552 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1553 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1554 break; 1555 } 1556 log_info("Init script done"); 1557 1558 // Init script download on Broadcom chipsets causes: 1559 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1560 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1561 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1562 1563 // - baud rate to reset, restore UART baud rate if needed 1564 if (need_baud_change) { 1565 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1566 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1567 hci_stack->hci_transport->set_baudrate(baud_rate); 1568 } 1569 1570 uint16_t bcm_delay_ms = 300; 1571 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1572 // -> Work around: wait here. 1573 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1574 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1575 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1576 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1577 btstack_run_loop_add_timer(&hci_stack->timeout); 1578 break; 1579 } 1580 } 1581 /* fall through */ 1582 #endif 1583 1584 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1585 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1586 hci_send_cmd(&hci_read_local_supported_commands); 1587 break; 1588 case HCI_INIT_READ_BD_ADDR: 1589 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1590 hci_send_cmd(&hci_read_bd_addr); 1591 break; 1592 case HCI_INIT_READ_BUFFER_SIZE: 1593 // only read buffer size if supported 1594 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1595 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1596 hci_send_cmd(&hci_read_buffer_size); 1597 break; 1598 } 1599 /* fall through */ 1600 1601 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1602 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1603 hci_send_cmd(&hci_read_local_supported_features); 1604 break; 1605 1606 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1607 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1608 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1609 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1610 break; 1611 case HCI_INIT_HOST_BUFFER_SIZE: 1612 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1613 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1614 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1615 break; 1616 #endif 1617 1618 case HCI_INIT_SET_EVENT_MASK: 1619 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1620 if (hci_le_supported()){ 1621 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1622 } else { 1623 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1624 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1625 } 1626 break; 1627 1628 #ifdef ENABLE_CLASSIC 1629 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1630 if (hci_classic_supported() && gap_ssp_supported()){ 1631 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1632 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1633 break; 1634 } 1635 /* fall through */ 1636 1637 case HCI_INIT_WRITE_INQUIRY_MODE: 1638 if (hci_classic_supported()){ 1639 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1640 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1641 break; 1642 } 1643 /* fall through */ 1644 1645 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1646 // skip write secure connections host support if not supported or disabled 1647 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1648 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1649 hci_stack->secure_connections_active = true; 1650 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1651 break; 1652 } 1653 /* fall through */ 1654 1655 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1656 if (hci_classic_supported()){ 1657 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1658 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1659 break; 1660 } 1661 /* fall through */ 1662 1663 #ifdef ENABLE_SCO_OVER_HCI 1664 // only sent if ENABLE_SCO_OVER_HCI is defined 1665 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1666 // skip write synchronous flow control if not supported 1667 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1668 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1669 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1670 break; 1671 } 1672 /* fall through */ 1673 1674 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1675 // skip write default erroneous data reporting if not supported 1676 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1677 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1678 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1679 break; 1680 } 1681 /* fall through */ 1682 #endif 1683 1684 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1685 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1686 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1687 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1688 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1689 #ifdef ENABLE_SCO_OVER_HCI 1690 log_info("BCM: Route SCO data via HCI transport"); 1691 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1692 #endif 1693 #ifdef ENABLE_SCO_OVER_PCM 1694 log_info("BCM: Route SCO data via PCM interface"); 1695 #ifdef ENABLE_BCM_PCM_WBS 1696 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1697 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1698 #else 1699 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1700 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1701 #endif 1702 #endif 1703 break; 1704 } 1705 /* fall through */ 1706 #endif 1707 1708 #ifdef ENABLE_SCO_OVER_PCM 1709 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1710 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1711 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1712 log_info("BCM: Config PCM interface for I2S"); 1713 #ifdef ENABLE_BCM_PCM_WBS 1714 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1715 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1716 #else 1717 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1718 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1719 #endif 1720 break; 1721 } 1722 /* fall through */ 1723 #endif 1724 #endif 1725 1726 #ifdef ENABLE_BLE 1727 // LE INIT 1728 case HCI_INIT_LE_READ_BUFFER_SIZE: 1729 if (hci_le_supported()){ 1730 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1731 hci_send_cmd(&hci_le_read_buffer_size); 1732 break; 1733 } 1734 /* fall through */ 1735 1736 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1737 // skip write le host if not supported (e.g. on LE only EM9301) 1738 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1739 // LE Supported Host = 1, Simultaneous Host = 0 1740 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1741 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1742 break; 1743 } 1744 /* fall through */ 1745 1746 case HCI_INIT_LE_SET_EVENT_MASK: 1747 if (hci_le_supported()){ 1748 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1749 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1750 break; 1751 } 1752 /* fall through */ 1753 1754 #endif 1755 1756 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1757 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1758 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1759 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1760 hci_send_cmd(&hci_le_read_maximum_data_length); 1761 break; 1762 } 1763 /* fall through */ 1764 1765 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1766 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1767 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1768 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1769 break; 1770 } 1771 /* fall through */ 1772 #endif 1773 1774 #ifdef ENABLE_LE_CENTRAL 1775 case HCI_INIT_READ_WHITE_LIST_SIZE: 1776 if (hci_le_supported()){ 1777 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1778 hci_send_cmd(&hci_le_read_white_list_size); 1779 break; 1780 } 1781 /* fall through */ 1782 1783 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1784 if (hci_le_supported()){ 1785 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1786 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1787 break; 1788 } 1789 /* fall through */ 1790 #endif 1791 1792 case HCI_INIT_DONE: 1793 hci_stack->substate = HCI_INIT_DONE; 1794 #ifdef ENABLE_CLASSIC 1795 // init sequence complete, check if GAP Tasks are completed 1796 if (hci_stack->gap_tasks != 0) { 1797 hci_run_gap_tasks_classic(); 1798 break; 1799 } 1800 #endif 1801 hci_init_done(); 1802 break; 1803 1804 default: 1805 return; 1806 } 1807 } 1808 1809 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1810 bool command_completed = false; 1811 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1812 uint16_t opcode = little_endian_read_16(packet,3); 1813 if (opcode == hci_stack->last_cmd_opcode){ 1814 command_completed = true; 1815 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1816 } else { 1817 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1818 } 1819 } 1820 1821 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1822 uint8_t status = packet[2]; 1823 uint16_t opcode = little_endian_read_16(packet,4); 1824 if (opcode == hci_stack->last_cmd_opcode){ 1825 if (status){ 1826 command_completed = true; 1827 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1828 } else { 1829 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1830 } 1831 } else { 1832 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1833 } 1834 } 1835 #ifndef HAVE_HOST_CONTROLLER_API 1836 // Vendor == CSR 1837 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1838 // TODO: track actual command 1839 command_completed = true; 1840 } 1841 1842 // Vendor == Toshiba 1843 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1844 // TODO: track actual command 1845 command_completed = true; 1846 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1847 hci_stack->num_cmd_packets = 1; 1848 } 1849 #endif 1850 1851 return command_completed; 1852 } 1853 1854 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1855 1856 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1857 1858 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1859 1860 #ifndef HAVE_HOST_CONTROLLER_API 1861 1862 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1863 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1864 // 1865 // HCI Reset 1866 // Timeout 100 ms 1867 // HCI Reset 1868 // Command Complete Reset 1869 // HCI Read Local Version Information 1870 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1871 // hang... 1872 // 1873 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1874 if (!command_completed 1875 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1876 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1877 1878 uint16_t opcode = little_endian_read_16(packet,3); 1879 if (opcode == hci_reset.opcode){ 1880 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1881 return; 1882 } 1883 } 1884 1885 // CSR & H5 1886 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1887 if (!command_completed 1888 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1889 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1890 1891 uint16_t opcode = little_endian_read_16(packet,3); 1892 if (opcode == hci_reset.opcode){ 1893 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1894 return; 1895 } 1896 } 1897 1898 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1899 // fix: Correct substate and behave as command below 1900 if (command_completed){ 1901 switch (hci_stack->substate){ 1902 case HCI_INIT_SEND_RESET: 1903 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1904 break; 1905 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1906 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1907 break; 1908 default: 1909 break; 1910 } 1911 } 1912 1913 #endif 1914 1915 if (!command_completed) return; 1916 1917 bool need_baud_change = false; 1918 bool need_addr_change = false; 1919 1920 #ifndef HAVE_HOST_CONTROLLER_API 1921 need_baud_change = hci_stack->config 1922 && hci_stack->chipset 1923 && hci_stack->chipset->set_baudrate_command 1924 && hci_stack->hci_transport->set_baudrate 1925 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1926 1927 need_addr_change = hci_stack->custom_bd_addr_set 1928 && hci_stack->chipset 1929 && hci_stack->chipset->set_bd_addr_command; 1930 #endif 1931 1932 switch(hci_stack->substate){ 1933 1934 #ifndef HAVE_HOST_CONTROLLER_API 1935 case HCI_INIT_SEND_RESET: 1936 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1937 // fix: just correct substate and behave as command below 1938 1939 /* fall through */ 1940 #endif 1941 1942 case HCI_INIT_W4_SEND_RESET: 1943 btstack_run_loop_remove_timer(&hci_stack->timeout); 1944 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1945 return; 1946 1947 #ifndef HAVE_HOST_CONTROLLER_API 1948 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1949 // for STLC2500D, baud rate change already happened. 1950 // for others, baud rate gets changed now 1951 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1952 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1953 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1954 hci_stack->hci_transport->set_baudrate(baud_rate); 1955 } 1956 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1957 return; 1958 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1959 btstack_run_loop_remove_timer(&hci_stack->timeout); 1960 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1961 return; 1962 case HCI_INIT_W4_CUSTOM_INIT: 1963 // repeat custom init 1964 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1965 return; 1966 #endif 1967 1968 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1969 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1970 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1971 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1972 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1973 return; 1974 } 1975 if (need_addr_change){ 1976 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1977 return; 1978 } 1979 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1980 return; 1981 #ifndef HAVE_HOST_CONTROLLER_API 1982 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1983 if (need_baud_change){ 1984 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1985 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1986 hci_stack->hci_transport->set_baudrate(baud_rate); 1987 } 1988 if (need_addr_change){ 1989 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1990 return; 1991 } 1992 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1993 return; 1994 case HCI_INIT_W4_SET_BD_ADDR: 1995 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1996 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1997 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1998 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1999 return; 2000 } 2001 // skipping st warm boot 2002 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2003 return; 2004 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2005 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2006 return; 2007 #endif 2008 2009 case HCI_INIT_DONE: 2010 // set state if we came here by fall through 2011 hci_stack->substate = HCI_INIT_DONE; 2012 return; 2013 2014 default: 2015 break; 2016 } 2017 hci_initializing_next_state(); 2018 } 2019 2020 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2021 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2022 bd_addr_t bd_address; 2023 (void)memcpy(&bd_address, conn->address, 6); 2024 2025 #ifdef ENABLE_CLASSIC 2026 // cache needed data 2027 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2028 #endif 2029 2030 // connection failed, remove entry 2031 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2032 btstack_memory_hci_connection_free( conn ); 2033 2034 #ifdef ENABLE_CLASSIC 2035 // notify client if dedicated bonding 2036 if (notify_dedicated_bonding_failed){ 2037 log_info("hci notify_dedicated_bonding_failed"); 2038 hci_emit_dedicated_bonding_result(bd_address, status); 2039 } 2040 2041 // if authentication error, also delete link key 2042 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2043 gap_drop_link_key_for_bd_addr(bd_address); 2044 } 2045 #else 2046 UNUSED(status); 2047 #endif 2048 } 2049 2050 #ifdef ENABLE_CLASSIC 2051 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2052 // SSP Controller 2053 if (features[6] & (1 << 3)){ 2054 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2055 } 2056 // eSCO 2057 if (features[3] & (1<<7)){ 2058 conn->remote_supported_features[0] |= 1; 2059 } 2060 // Extended features 2061 if (features[7] & (1<<7)){ 2062 conn->remote_supported_features[0] |= 2; 2063 } 2064 } 2065 2066 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2067 // SSP Host 2068 if (features[0] & (1 << 0)){ 2069 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2070 } 2071 // SC Host 2072 if (features[0] & (1 << 3)){ 2073 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2074 } 2075 } 2076 2077 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2078 // SC Controller 2079 if (features[1] & (1 << 0)){ 2080 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2081 } 2082 } 2083 2084 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2085 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2086 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2087 if (conn->bonding_flags & BONDING_DEDICATED){ 2088 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2089 } 2090 } 2091 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2092 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2093 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2094 } 2095 2096 #endif 2097 2098 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2099 // handle BT initialization 2100 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2101 hci_initializing_event_handler(packet, size); 2102 } 2103 2104 // help with BT sleep 2105 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2106 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2107 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2108 hci_initializing_next_state(); 2109 } 2110 } 2111 2112 #ifdef ENABLE_CLASSIC 2113 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2114 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2115 conn->encryption_key_size = encryption_key_size; 2116 2117 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2118 conn->requested_security_level = LEVEL_0; 2119 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2120 return; 2121 } 2122 2123 // Request Authentication if not already done 2124 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2125 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2126 } 2127 #endif 2128 2129 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2130 UNUSED(size); 2131 2132 uint16_t manufacturer; 2133 #ifdef ENABLE_CLASSIC 2134 hci_con_handle_t handle; 2135 hci_connection_t * conn; 2136 uint8_t status; 2137 #endif 2138 // get num cmd packets - limit to 1 to reduce complexity 2139 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2140 2141 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2142 switch (opcode){ 2143 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2144 if (packet[5]) break; 2145 // terminate, name 248 chars 2146 packet[6+248] = 0; 2147 log_info("local name: %s", &packet[6]); 2148 break; 2149 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2150 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2151 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2152 uint16_t acl_len = little_endian_read_16(packet, 6); 2153 uint16_t sco_len = packet[8]; 2154 2155 // determine usable ACL/SCO payload size 2156 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2157 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2158 2159 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2160 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2161 2162 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2163 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2164 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2165 } 2166 break; 2167 case HCI_OPCODE_HCI_READ_RSSI: 2168 if (packet[5] == ERROR_CODE_SUCCESS){ 2169 uint8_t event[5]; 2170 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2171 event[1] = 3; 2172 (void)memcpy(&event[2], &packet[6], 3); 2173 hci_emit_event(event, sizeof(event), 1); 2174 } 2175 break; 2176 #ifdef ENABLE_BLE 2177 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2178 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2179 hci_stack->le_acl_packets_total_num = packet[8]; 2180 // determine usable ACL payload size 2181 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2182 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2183 } 2184 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2185 break; 2186 #endif 2187 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2188 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2189 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2190 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2191 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); 2192 break; 2193 #endif 2194 #ifdef ENABLE_LE_CENTRAL 2195 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2196 hci_stack->le_whitelist_capacity = packet[6]; 2197 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2198 break; 2199 #endif 2200 case HCI_OPCODE_HCI_READ_BD_ADDR: 2201 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2202 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)); 2203 #ifdef ENABLE_CLASSIC 2204 if (hci_stack->link_key_db){ 2205 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2206 } 2207 #endif 2208 break; 2209 #ifdef ENABLE_CLASSIC 2210 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2211 hci_emit_discoverable_enabled(hci_stack->discoverable); 2212 break; 2213 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2214 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2215 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2216 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2217 hci_emit_event(event, sizeof(event), 1); 2218 } 2219 break; 2220 #endif 2221 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2222 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2223 2224 #ifdef ENABLE_CLASSIC 2225 // determine usable ACL packet types based on host buffer size and supported features 2226 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2227 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2228 #endif 2229 // Classic/LE 2230 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2231 break; 2232 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2233 manufacturer = little_endian_read_16(packet, 10); 2234 // map Cypress to Broadcom 2235 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2236 log_info("Treat Cypress as Broadcom"); 2237 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2238 little_endian_store_16(packet, 10, manufacturer); 2239 } 2240 hci_stack->manufacturer = manufacturer; 2241 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2242 break; 2243 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2244 hci_stack->local_supported_commands[0] = 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2248 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2249 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2250 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2251 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2252 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2253 hci_stack->local_supported_commands[1] = 2254 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2255 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2256 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2257 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2258 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2259 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2260 break; 2261 #ifdef ENABLE_CLASSIC 2262 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2263 if (packet[5]) return; 2264 hci_stack->synchronous_flow_control_enabled = 1; 2265 break; 2266 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2267 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2268 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2269 conn = hci_connection_for_handle(handle); 2270 if (conn != NULL) { 2271 uint8_t key_size = 0; 2272 if (status == 0){ 2273 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2274 log_info("Handle %04x key Size: %u", handle, key_size); 2275 } else { 2276 key_size = 1; 2277 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2278 } 2279 hci_handle_read_encryption_key_size_complete(conn, key_size); 2280 } 2281 break; 2282 // assert pairing complete event is emitted. 2283 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2284 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2285 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2286 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2287 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2288 // lookup connection by gap pairing addr 2289 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2290 if (conn == NULL) break; 2291 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2292 break; 2293 2294 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2295 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2296 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2297 uint8_t event[67]; 2298 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2299 event[1] = 65; 2300 (void)memset(&event[2], 0, 65); 2301 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2302 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2303 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2304 event[2] = 3; 2305 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2306 } else { 2307 event[2] = 1; 2308 } 2309 } 2310 hci_emit_event(event, sizeof(event), 0); 2311 break; 2312 } 2313 2314 // note: only needed if user does not provide OOB data 2315 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2316 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2317 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2318 if (conn == NULL) break; 2319 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2320 break; 2321 #endif 2322 #endif 2323 default: 2324 break; 2325 } 2326 } 2327 2328 #ifdef ENABLE_BLE 2329 static void event_handle_le_connection_complete(const uint8_t * packet){ 2330 bd_addr_t addr; 2331 bd_addr_type_t addr_type; 2332 hci_connection_t * conn; 2333 2334 // Connection management 2335 reverse_bd_addr(&packet[8], addr); 2336 addr_type = (bd_addr_type_t)packet[7]; 2337 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2338 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2339 2340 #ifdef ENABLE_LE_CENTRAL 2341 // handle error: error is reported only to the initiator -> outgoing connection 2342 if (packet[3]){ 2343 2344 // handle cancelled outgoing connection 2345 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2346 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2347 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2348 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2349 // reset state 2350 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2351 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2352 // get outgoing connection conn struct for direct connect 2353 conn = gap_get_outgoing_connection(); 2354 } 2355 2356 // outgoing le connection establishment is done 2357 if (conn){ 2358 // remove entry 2359 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2360 btstack_memory_hci_connection_free( conn ); 2361 } 2362 return; 2363 } 2364 #endif 2365 2366 // on success, both hosts receive connection complete event 2367 if (packet[6] == HCI_ROLE_MASTER){ 2368 #ifdef ENABLE_LE_CENTRAL 2369 // if we're master on an le connection, it was an outgoing connection and we're done with it 2370 // note: no hci_connection_t object exists yet for connect with whitelist 2371 if (hci_is_le_connection_type(addr_type)){ 2372 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2373 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2374 } 2375 #endif 2376 } else { 2377 #ifdef ENABLE_LE_PERIPHERAL 2378 // if we're slave, it was an incoming connection, advertisements have stopped 2379 hci_stack->le_advertisements_active = false; 2380 #endif 2381 } 2382 2383 // LE connections are auto-accepted, so just create a connection if there isn't one already 2384 if (!conn){ 2385 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2386 } 2387 2388 // no memory, sorry. 2389 if (!conn){ 2390 return; 2391 } 2392 2393 conn->state = OPEN; 2394 conn->role = packet[6]; 2395 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2396 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2397 2398 #ifdef ENABLE_LE_PERIPHERAL 2399 if (packet[6] == HCI_ROLE_SLAVE){ 2400 hci_update_advertisements_enabled_for_current_roles(); 2401 } 2402 #endif 2403 2404 // init unenhanced att bearer mtu 2405 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2406 conn->att_connection.mtu_exchanged = false; 2407 2408 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2409 2410 // restart timer 2411 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2412 // btstack_run_loop_add_timer(&conn->timeout); 2413 2414 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2415 2416 hci_emit_nr_connections_changed(); 2417 } 2418 #endif 2419 2420 #ifdef ENABLE_CLASSIC 2421 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){ 2422 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2423 // LEVEL_4 is tested by l2cap 2424 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2425 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2426 if (level >= LEVEL_3){ 2427 // MITM not possible without keyboard or display 2428 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2429 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2430 2431 // MITM possible if one side has keyboard and the other has keyboard or display 2432 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2433 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2434 2435 // MITM not possible if one side has only display and other side has no keyboard 2436 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2437 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2438 } 2439 // LEVEL 2 requires SSP, which is a given 2440 return true; 2441 } 2442 2443 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2444 uint16_t i; 2445 for (i=0; i < size ; i++){ 2446 if (data[i] != 0) { 2447 return false; 2448 } 2449 } 2450 return true; 2451 } 2452 2453 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2454 // get requested security level 2455 gap_security_level_t requested_security_level = conn->requested_security_level; 2456 if (hci_stack->gap_secure_connections_only_mode){ 2457 requested_security_level = LEVEL_4; 2458 } 2459 2460 // assess security: LEVEL 4 requires SC 2461 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2462 if ((requested_security_level == LEVEL_4) && 2463 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2464 !hci_remote_sc_enabled(conn)){ 2465 log_info("Level 4 required, but SC not supported -> abort"); 2466 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2467 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2468 return; 2469 } 2470 2471 // assess security based on io capabilities 2472 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2473 // responder: fully validate io caps of both sides as well as OOB data 2474 bool security_possible = false; 2475 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2476 2477 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2478 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2479 // so we merge the OOB data availability 2480 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2481 if (conn->classic_oob_c_192 != NULL){ 2482 have_oob_data |= 1; 2483 } 2484 if (conn->classic_oob_c_256 != NULL){ 2485 have_oob_data |= 2; 2486 } 2487 // for up to Level 3, either P-192 as well as P-256 will do 2488 // 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 2489 // if remote does not SC, we should not receive P-256 data either 2490 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2491 security_possible = true; 2492 } 2493 // for Level 4, P-256 is needed 2494 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2495 security_possible = true; 2496 } 2497 #endif 2498 2499 if (security_possible == false){ 2500 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2501 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2502 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2503 return; 2504 } 2505 } else { 2506 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2507 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2508 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2509 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2510 log_info("Level 3+ required, but no input/output -> abort"); 2511 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2512 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2513 return; 2514 } 2515 #endif 2516 #endif 2517 } 2518 2519 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2520 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2521 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2522 } else { 2523 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2524 } 2525 #endif 2526 } 2527 2528 #endif 2529 2530 static void event_handler(uint8_t *packet, uint16_t size){ 2531 2532 uint16_t event_length = packet[1]; 2533 2534 // assert packet is complete 2535 if (size != (event_length + 2u)){ 2536 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2537 return; 2538 } 2539 2540 bd_addr_type_t addr_type; 2541 hci_con_handle_t handle; 2542 hci_connection_t * conn; 2543 int i; 2544 int create_connection_cmd; 2545 2546 #ifdef ENABLE_CLASSIC 2547 hci_link_type_t link_type; 2548 bd_addr_t addr; 2549 #endif 2550 2551 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2552 2553 switch (hci_event_packet_get_type(packet)) { 2554 2555 case HCI_EVENT_COMMAND_COMPLETE: 2556 handle_command_complete_event(packet, size); 2557 break; 2558 2559 case HCI_EVENT_COMMAND_STATUS: 2560 // get num cmd packets - limit to 1 to reduce complexity 2561 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2562 2563 // check command status to detected failed outgoing connections 2564 create_connection_cmd = 0; 2565 #ifdef ENABLE_CLASSIC 2566 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2567 create_connection_cmd = 1; 2568 } 2569 #endif 2570 #ifdef ENABLE_LE_CENTRAL 2571 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2572 create_connection_cmd = 1; 2573 } 2574 #endif 2575 if (create_connection_cmd) { 2576 uint8_t status = hci_event_command_status_get_status(packet); 2577 addr_type = hci_stack->outgoing_addr_type; 2578 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2579 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); 2580 2581 // reset outgoing address info 2582 memset(hci_stack->outgoing_addr, 0, 6); 2583 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2584 2585 // on error 2586 if (status != ERROR_CODE_SUCCESS){ 2587 #ifdef ENABLE_LE_CENTRAL 2588 if (hci_is_le_connection_type(addr_type)){ 2589 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2590 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2591 } 2592 #endif 2593 // error => outgoing connection failed 2594 if (conn != NULL){ 2595 hci_handle_connection_failed(conn, status); 2596 } 2597 } 2598 } 2599 2600 #ifdef ENABLE_CLASSIC 2601 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2602 uint8_t status = hci_event_command_status_get_status(packet); 2603 log_info("command status (inquiry), status %x", status); 2604 if (status == ERROR_CODE_SUCCESS) { 2605 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2606 } else { 2607 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2608 } 2609 } 2610 #endif 2611 break; 2612 2613 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2614 if (size < 3) return; 2615 uint16_t num_handles = packet[2]; 2616 if (size != (3u + num_handles * 4u)) return; 2617 uint16_t offset = 3; 2618 for (i=0; i<num_handles;i++){ 2619 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2620 offset += 2u; 2621 uint16_t num_packets = little_endian_read_16(packet, offset); 2622 offset += 2u; 2623 2624 conn = hci_connection_for_handle(handle); 2625 if (!conn){ 2626 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2627 continue; 2628 } 2629 2630 if (conn->num_packets_sent >= num_packets){ 2631 conn->num_packets_sent -= num_packets; 2632 } else { 2633 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2634 conn->num_packets_sent = 0; 2635 } 2636 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2637 2638 #ifdef ENABLE_CLASSIC 2639 // For SCO, we do the can_send_now_check here 2640 hci_notify_if_sco_can_send_now(); 2641 #endif 2642 } 2643 break; 2644 } 2645 2646 #ifdef ENABLE_CLASSIC 2647 case HCI_EVENT_INQUIRY_COMPLETE: 2648 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2649 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2650 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2651 hci_emit_event(event, sizeof(event), 1); 2652 } 2653 break; 2654 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2655 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2656 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2657 } 2658 break; 2659 case HCI_EVENT_CONNECTION_REQUEST: 2660 reverse_bd_addr(&packet[2], addr); 2661 link_type = (hci_link_type_t) packet[11]; 2662 2663 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2664 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2665 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2666 bd_addr_copy(hci_stack->decline_addr, addr); 2667 break; 2668 } 2669 2670 if (hci_stack->gap_classic_accept_callback != NULL){ 2671 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2672 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2673 bd_addr_copy(hci_stack->decline_addr, addr); 2674 break; 2675 } 2676 } 2677 2678 // TODO: eval COD 8-10 2679 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2680 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2681 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2682 if (!conn) { 2683 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2684 } 2685 if (!conn) { 2686 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2687 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2688 bd_addr_copy(hci_stack->decline_addr, addr); 2689 break; 2690 } 2691 conn->role = HCI_ROLE_SLAVE; 2692 conn->state = RECEIVED_CONNECTION_REQUEST; 2693 // store info about eSCO 2694 if (link_type == HCI_LINK_TYPE_ESCO){ 2695 conn->remote_supported_features[0] |= 1; 2696 } 2697 hci_run(); 2698 break; 2699 2700 case HCI_EVENT_CONNECTION_COMPLETE: 2701 // Connection management 2702 reverse_bd_addr(&packet[5], addr); 2703 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2704 addr_type = BD_ADDR_TYPE_ACL; 2705 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2706 if (conn) { 2707 if (!packet[2]){ 2708 conn->state = OPEN; 2709 conn->con_handle = little_endian_read_16(packet, 3); 2710 2711 // queue set supervision timeout if we're master 2712 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2713 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2714 } 2715 2716 // restart timer 2717 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2718 btstack_run_loop_add_timer(&conn->timeout); 2719 2720 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2721 2722 hci_emit_nr_connections_changed(); 2723 } else { 2724 // connection failed 2725 hci_handle_connection_failed(conn, packet[2]); 2726 } 2727 } 2728 break; 2729 2730 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2731 reverse_bd_addr(&packet[5], addr); 2732 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2733 if (packet[2]){ 2734 // connection failed 2735 break; 2736 } 2737 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2738 if (!conn) { 2739 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2740 } 2741 if (!conn) { 2742 break; 2743 } 2744 conn->state = OPEN; 2745 conn->con_handle = little_endian_read_16(packet, 3); 2746 2747 #ifdef ENABLE_SCO_OVER_HCI 2748 // update SCO 2749 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2750 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2751 } 2752 // trigger can send now 2753 if (hci_have_usb_transport()){ 2754 hci_stack->sco_can_send_now = true; 2755 } 2756 #endif 2757 #ifdef HAVE_SCO_TRANSPORT 2758 // configure sco transport 2759 if (hci_stack->sco_transport != NULL){ 2760 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2761 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2762 } 2763 #endif 2764 break; 2765 2766 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2767 handle = little_endian_read_16(packet, 3); 2768 conn = hci_connection_for_handle(handle); 2769 if (!conn) break; 2770 if (!packet[2]){ 2771 const uint8_t * features = &packet[5]; 2772 hci_handle_remote_features_page_0(conn, features); 2773 2774 // read extended features if possible 2775 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2776 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2777 break; 2778 } 2779 } 2780 hci_handle_remote_features_received(conn); 2781 break; 2782 2783 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2784 handle = little_endian_read_16(packet, 3); 2785 conn = hci_connection_for_handle(handle); 2786 if (!conn) break; 2787 // status = ok, page = 1 2788 if (!packet[2]) { 2789 uint8_t page_number = packet[5]; 2790 uint8_t maximum_page_number = packet[6]; 2791 const uint8_t * features = &packet[7]; 2792 bool done = false; 2793 switch (page_number){ 2794 case 1: 2795 hci_handle_remote_features_page_1(conn, features); 2796 if (maximum_page_number >= 2){ 2797 // get Secure Connections (Controller) from Page 2 if available 2798 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2799 } else { 2800 // otherwise, assume SC (Controller) == SC (Host) 2801 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2802 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2803 } 2804 done = true; 2805 } 2806 break; 2807 case 2: 2808 hci_handle_remote_features_page_2(conn, features); 2809 done = true; 2810 break; 2811 default: 2812 break; 2813 } 2814 if (!done) break; 2815 } 2816 hci_handle_remote_features_received(conn); 2817 break; 2818 2819 case HCI_EVENT_LINK_KEY_REQUEST: 2820 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2821 hci_event_link_key_request_get_bd_addr(packet, addr); 2822 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2823 if (!conn) break; 2824 2825 // lookup link key in db if not cached 2826 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2827 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2828 } 2829 2830 // response sent by hci_run() 2831 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2832 #endif 2833 break; 2834 2835 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2836 hci_event_link_key_request_get_bd_addr(packet, addr); 2837 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2838 if (!conn) break; 2839 2840 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2841 2842 // CVE-2020-26555: ignore NULL link key 2843 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2844 if (btstack_is_null(&packet[8], 16)) break; 2845 2846 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2847 // Change Connection Encryption keeps link key type 2848 if (link_key_type != CHANGED_COMBINATION_KEY){ 2849 conn->link_key_type = link_key_type; 2850 } 2851 2852 // cache link key. link keys stored in little-endian format for legacy reasons 2853 memcpy(&conn->link_key, &packet[8], 16); 2854 2855 // only store link key: 2856 // - if bondable enabled 2857 if (hci_stack->bondable == false) break; 2858 // - if security level sufficient 2859 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2860 // - for SSP, also check if remote side requested bonding as well 2861 if (conn->link_key_type != COMBINATION_KEY){ 2862 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2863 if (!remote_bonding){ 2864 break; 2865 } 2866 } 2867 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2868 break; 2869 } 2870 2871 case HCI_EVENT_PIN_CODE_REQUEST: 2872 hci_event_pin_code_request_get_bd_addr(packet, addr); 2873 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2874 if (!conn) break; 2875 2876 hci_pairing_started(conn, false); 2877 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2878 if (!hci_stack->bondable ){ 2879 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2880 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2881 hci_run(); 2882 return; 2883 } 2884 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2885 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2886 log_info("Level 4 required, but SC not supported -> abort"); 2887 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2888 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2889 hci_run(); 2890 return; 2891 } 2892 break; 2893 2894 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2895 hci_event_io_capability_response_get_bd_addr(packet, addr); 2896 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2897 if (!conn) break; 2898 2899 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2900 hci_pairing_started(conn, true); 2901 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2902 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2903 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2904 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2905 #endif 2906 break; 2907 2908 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2909 hci_event_io_capability_response_get_bd_addr(packet, addr); 2910 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2911 if (!conn) break; 2912 2913 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2914 hci_connection_timestamp(conn); 2915 hci_pairing_started(conn, true); 2916 break; 2917 2918 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2919 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2920 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2921 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2922 if (!conn) break; 2923 2924 hci_connection_timestamp(conn); 2925 2926 hci_pairing_started(conn, true); 2927 2928 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2929 break; 2930 #endif 2931 2932 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2933 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2934 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2935 if (!conn) break; 2936 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2937 if (hci_stack->ssp_auto_accept){ 2938 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2939 }; 2940 } else { 2941 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2942 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2943 // don't forward event to app 2944 hci_run(); 2945 return; 2946 } 2947 break; 2948 2949 case HCI_EVENT_USER_PASSKEY_REQUEST: 2950 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2951 if (hci_stack->ssp_auto_accept){ 2952 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2953 }; 2954 break; 2955 2956 case HCI_EVENT_MODE_CHANGE: 2957 handle = hci_event_mode_change_get_handle(packet); 2958 conn = hci_connection_for_handle(handle); 2959 if (!conn) break; 2960 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2961 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2962 break; 2963 #endif 2964 2965 case HCI_EVENT_ENCRYPTION_CHANGE: 2966 handle = hci_event_encryption_change_get_connection_handle(packet); 2967 conn = hci_connection_for_handle(handle); 2968 if (!conn) break; 2969 if (hci_event_encryption_change_get_status(packet) == 0u) { 2970 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2971 if (encryption_enabled){ 2972 if (hci_is_le_connection(conn)){ 2973 // For LE, we accept connection as encrypted 2974 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2975 } 2976 #ifdef ENABLE_CLASSIC 2977 else { 2978 2979 // dedicated bonding: send result and disconnect 2980 if (conn->bonding_flags & BONDING_DEDICATED){ 2981 conn->bonding_flags &= ~BONDING_DEDICATED; 2982 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2983 conn->bonding_status = packet[2]; 2984 break; 2985 } 2986 2987 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2988 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2989 bool connected_uses_aes_ccm = encryption_enabled == 2; 2990 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2991 log_info("SC during pairing, but only E0 now -> abort"); 2992 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2993 break; 2994 } 2995 2996 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2997 if (connected_uses_aes_ccm){ 2998 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2999 } 3000 3001 #ifdef ENABLE_TESTING_SUPPORT 3002 // work around for issue with PTS dongle 3003 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3004 #endif 3005 3006 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3007 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3008 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3009 } else { 3010 // if not, pretend everything is perfect 3011 hci_handle_read_encryption_key_size_complete(conn, 16); 3012 } 3013 } 3014 #endif 3015 } else { 3016 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3017 } 3018 } 3019 3020 break; 3021 3022 #ifdef ENABLE_CLASSIC 3023 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3024 handle = hci_event_authentication_complete_get_connection_handle(packet); 3025 conn = hci_connection_for_handle(handle); 3026 if (!conn) break; 3027 3028 // clear authentication active flag 3029 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3030 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3031 3032 // authenticated only if auth status == 0 3033 if (hci_event_authentication_complete_get_status(packet) == 0){ 3034 // authenticated 3035 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3036 3037 // If not already encrypted, start encryption 3038 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3039 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3040 break; 3041 } 3042 } 3043 3044 // emit updated security level 3045 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3046 break; 3047 3048 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3049 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3050 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3051 if (!conn) break; 3052 3053 // treat successfully paired connection as authenticated 3054 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3055 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3056 } 3057 3058 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3059 break; 3060 #endif 3061 3062 // HCI_EVENT_DISCONNECTION_COMPLETE 3063 // has been split, to first notify stack before shutting connection down 3064 // see end of function, too. 3065 case HCI_EVENT_DISCONNECTION_COMPLETE: 3066 if (packet[2]) break; // status != 0 3067 handle = little_endian_read_16(packet, 3); 3068 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3069 if (hci_stack->acl_fragmentation_total_size > 0u) { 3070 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3071 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3072 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3073 hci_stack->acl_fragmentation_total_size = 0; 3074 hci_stack->acl_fragmentation_pos = 0; 3075 if (release_buffer){ 3076 hci_release_packet_buffer(); 3077 } 3078 } 3079 } 3080 3081 conn = hci_connection_for_handle(handle); 3082 if (!conn) break; 3083 #ifdef ENABLE_CLASSIC 3084 // pairing failed if it was ongoing 3085 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3086 #endif 3087 3088 // emit dedicatd bonding event 3089 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3090 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3091 } 3092 3093 // mark connection for shutdown, stop timers, reset state 3094 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3095 hci_connection_stop_timer(conn); 3096 hci_connection_init(conn); 3097 3098 #ifdef ENABLE_BLE 3099 #ifdef ENABLE_LE_PERIPHERAL 3100 // re-enable advertisements for le connections if active 3101 if (hci_is_le_connection(conn)){ 3102 hci_update_advertisements_enabled_for_current_roles(); 3103 } 3104 #endif 3105 #endif 3106 break; 3107 3108 case HCI_EVENT_HARDWARE_ERROR: 3109 log_error("Hardware Error: 0x%02x", packet[2]); 3110 if (hci_stack->hardware_error_callback){ 3111 (*hci_stack->hardware_error_callback)(packet[2]); 3112 } else { 3113 // if no special requests, just reboot stack 3114 hci_power_control_off(); 3115 hci_power_control_on(); 3116 } 3117 break; 3118 3119 #ifdef ENABLE_CLASSIC 3120 case HCI_EVENT_ROLE_CHANGE: 3121 if (packet[2]) break; // status != 0 3122 reverse_bd_addr(&packet[3], addr); 3123 addr_type = BD_ADDR_TYPE_ACL; 3124 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3125 if (!conn) break; 3126 conn->role = packet[9]; 3127 break; 3128 #endif 3129 3130 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3131 // release packet buffer only for asynchronous transport and if there are not further fragements 3132 if (hci_transport_synchronous()) { 3133 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3134 return; // instead of break: to avoid re-entering hci_run() 3135 } 3136 hci_stack->acl_fragmentation_tx_active = 0; 3137 if (hci_stack->acl_fragmentation_total_size) break; 3138 hci_release_packet_buffer(); 3139 3140 // L2CAP receives this event via the hci_emit_event below 3141 3142 #ifdef ENABLE_CLASSIC 3143 // For SCO, we do the can_send_now_check here 3144 hci_notify_if_sco_can_send_now(); 3145 #endif 3146 break; 3147 3148 #ifdef ENABLE_CLASSIC 3149 case HCI_EVENT_SCO_CAN_SEND_NOW: 3150 // For SCO, we do the can_send_now_check here 3151 hci_stack->sco_can_send_now = true; 3152 hci_notify_if_sco_can_send_now(); 3153 return; 3154 3155 // explode inquriy results for easier consumption 3156 case HCI_EVENT_INQUIRY_RESULT: 3157 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3158 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3159 gap_inquiry_explode(packet, size); 3160 break; 3161 #endif 3162 3163 #ifdef ENABLE_BLE 3164 case HCI_EVENT_LE_META: 3165 switch (packet[2]){ 3166 #ifdef ENABLE_LE_CENTRAL 3167 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3168 // log_info("advertising report received"); 3169 if (!hci_stack->le_scanning_enabled) break; 3170 le_handle_advertisement_report(packet, size); 3171 break; 3172 #endif 3173 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3174 event_handle_le_connection_complete(packet); 3175 break; 3176 3177 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3178 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3179 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3180 conn = hci_connection_for_handle(handle); 3181 if (!conn) break; 3182 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3183 break; 3184 3185 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3186 // connection 3187 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3188 conn = hci_connection_for_handle(handle); 3189 if (conn) { 3190 // read arguments 3191 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3192 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3193 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3194 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3195 3196 // validate against current connection parameter range 3197 le_connection_parameter_range_t existing_range; 3198 gap_get_connection_parameter_range(&existing_range); 3199 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3200 if (update_parameter){ 3201 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3202 conn->le_conn_interval_min = le_conn_interval_min; 3203 conn->le_conn_interval_max = le_conn_interval_max; 3204 conn->le_conn_latency = le_conn_latency; 3205 conn->le_supervision_timeout = le_supervision_timeout; 3206 } else { 3207 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3208 } 3209 } 3210 break; 3211 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3212 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3213 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3214 conn = hci_connection_for_handle(handle); 3215 if (conn) { 3216 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3217 } 3218 break; 3219 #endif 3220 default: 3221 break; 3222 } 3223 break; 3224 #endif 3225 case HCI_EVENT_VENDOR_SPECIFIC: 3226 // Vendor specific commands often create vendor specific event instead of num completed packets 3227 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3228 switch (hci_stack->manufacturer){ 3229 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3230 hci_stack->num_cmd_packets = 1; 3231 break; 3232 default: 3233 break; 3234 } 3235 break; 3236 default: 3237 break; 3238 } 3239 3240 handle_event_for_current_stack_state(packet, size); 3241 3242 // notify upper stack 3243 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3244 3245 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3246 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3247 handle = little_endian_read_16(packet, 3); 3248 hci_connection_t * aConn = hci_connection_for_handle(handle); 3249 // discard connection if app did not trigger a reconnect in the event handler 3250 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3251 hci_shutdown_connection(aConn); 3252 } 3253 } 3254 3255 // execute main loop 3256 hci_run(); 3257 } 3258 3259 #ifdef ENABLE_CLASSIC 3260 3261 #ifdef ENABLE_SCO_OVER_HCI 3262 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3263 static void sco_schedule_tx(hci_connection_t * conn); 3264 3265 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3266 log_debug("SCO TX Timeout"); 3267 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3268 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3269 if (!conn) return; 3270 3271 // trigger send 3272 conn->sco_tx_ready = 1; 3273 // extra packet if CVSD but SCO buffer is too short 3274 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3275 conn->sco_tx_ready++; 3276 } 3277 hci_notify_if_sco_can_send_now(); 3278 } 3279 3280 3281 #define SCO_TX_AFTER_RX_MS (6) 3282 3283 static void sco_schedule_tx(hci_connection_t * conn){ 3284 3285 uint32_t now = btstack_run_loop_get_time_ms(); 3286 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3287 int time_delta_ms = sco_tx_ms - now; 3288 3289 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3290 3291 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3292 btstack_run_loop_remove_timer(timer); 3293 btstack_run_loop_set_timer(timer, time_delta_ms); 3294 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3295 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3296 btstack_run_loop_add_timer(timer); 3297 } 3298 #endif 3299 3300 static void sco_handler(uint8_t * packet, uint16_t size){ 3301 // lookup connection struct 3302 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3303 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3304 if (!conn) return; 3305 3306 #ifdef ENABLE_SCO_OVER_HCI 3307 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3308 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3309 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3310 packet[2] = 0x3c; 3311 memmove(&packet[3], &packet[23], 63); 3312 size = 63; 3313 } 3314 } 3315 3316 if (hci_have_usb_transport()){ 3317 // Nothing to do 3318 } else { 3319 // 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); 3320 if (hci_stack->synchronous_flow_control_enabled == 0){ 3321 uint32_t now = btstack_run_loop_get_time_ms(); 3322 3323 if (!conn->sco_rx_valid){ 3324 // ignore first 10 packets 3325 conn->sco_rx_count++; 3326 // log_debug("sco rx count %u", conn->sco_rx_count); 3327 if (conn->sco_rx_count == 10) { 3328 // use first timestamp as is and pretent it just started 3329 conn->sco_rx_ms = now; 3330 conn->sco_rx_valid = 1; 3331 conn->sco_rx_count = 0; 3332 sco_schedule_tx(conn); 3333 } 3334 } else { 3335 // track expected arrival timme 3336 conn->sco_rx_count++; 3337 conn->sco_rx_ms += 7; 3338 int delta = (int32_t) (now - conn->sco_rx_ms); 3339 if (delta > 0){ 3340 conn->sco_rx_ms++; 3341 } 3342 // log_debug("sco rx %u", conn->sco_rx_ms); 3343 sco_schedule_tx(conn); 3344 } 3345 } 3346 } 3347 #endif 3348 3349 // deliver to app 3350 if (hci_stack->sco_packet_handler) { 3351 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3352 } 3353 3354 #ifdef HAVE_SCO_TRANSPORT 3355 // We can send one packet for each received packet 3356 conn->sco_tx_ready++; 3357 hci_notify_if_sco_can_send_now(); 3358 #endif 3359 3360 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3361 conn->num_packets_completed++; 3362 hci_stack->host_completed_packets = 1; 3363 hci_run(); 3364 #endif 3365 } 3366 #endif 3367 3368 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3369 hci_dump_packet(packet_type, 1, packet, size); 3370 switch (packet_type) { 3371 case HCI_EVENT_PACKET: 3372 event_handler(packet, size); 3373 break; 3374 case HCI_ACL_DATA_PACKET: 3375 acl_handler(packet, size); 3376 break; 3377 #ifdef ENABLE_CLASSIC 3378 case HCI_SCO_DATA_PACKET: 3379 sco_handler(packet, size); 3380 break; 3381 #endif 3382 default: 3383 break; 3384 } 3385 } 3386 3387 /** 3388 * @brief Add event packet handler. 3389 */ 3390 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3391 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3392 } 3393 3394 3395 /** Register HCI packet handlers */ 3396 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3397 hci_stack->acl_packet_handler = handler; 3398 } 3399 3400 #ifdef ENABLE_CLASSIC 3401 /** 3402 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3403 */ 3404 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3405 hci_stack->sco_packet_handler = handler; 3406 } 3407 #endif 3408 3409 static void hci_state_reset(void){ 3410 // no connections yet 3411 hci_stack->connections = NULL; 3412 3413 // keep discoverable/connectable as this has been requested by the client(s) 3414 // hci_stack->discoverable = 0; 3415 // hci_stack->connectable = 0; 3416 // hci_stack->bondable = 1; 3417 // hci_stack->own_addr_type = 0; 3418 3419 // buffer is free 3420 hci_stack->hci_packet_buffer_reserved = false; 3421 3422 // no pending cmds 3423 hci_stack->decline_reason = 0; 3424 3425 hci_stack->secure_connections_active = false; 3426 3427 #ifdef ENABLE_CLASSIC 3428 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3429 hci_stack->gap_tasks = 3430 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3431 GAP_TASK_SET_CLASS_OF_DEVICE | 3432 GAP_TASK_SET_LOCAL_NAME | 3433 GAP_TASK_SET_EIR_DATA | 3434 GAP_TASK_WRITE_SCAN_ENABLE; 3435 #endif 3436 3437 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3438 hci_stack->classic_read_local_oob_data = true; 3439 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3440 #endif 3441 3442 // LE 3443 #ifdef ENABLE_BLE 3444 memset(hci_stack->le_random_address, 0, 6); 3445 hci_stack->le_random_address_set = 0; 3446 #endif 3447 #ifdef ENABLE_LE_CENTRAL 3448 hci_stack->le_scanning_active = false; 3449 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3450 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3451 hci_stack->le_whitelist_capacity = 0; 3452 #endif 3453 #ifdef ENABLE_LE_PERIPHERAL 3454 hci_stack->le_advertisements_active = false; 3455 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3456 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3457 } 3458 if (hci_stack->le_advertisements_data != NULL){ 3459 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3460 } 3461 #endif 3462 } 3463 3464 #ifdef ENABLE_CLASSIC 3465 /** 3466 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3467 */ 3468 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3469 // store and open remote device db 3470 hci_stack->link_key_db = link_key_db; 3471 if (hci_stack->link_key_db) { 3472 hci_stack->link_key_db->open(); 3473 } 3474 } 3475 #endif 3476 3477 void hci_init(const hci_transport_t *transport, const void *config){ 3478 3479 #ifdef HAVE_MALLOC 3480 if (!hci_stack) { 3481 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3482 } 3483 #else 3484 hci_stack = &hci_stack_static; 3485 #endif 3486 memset(hci_stack, 0, sizeof(hci_stack_t)); 3487 3488 // reference to use transport layer implementation 3489 hci_stack->hci_transport = transport; 3490 3491 // reference to used config 3492 hci_stack->config = config; 3493 3494 // setup pointer for outgoing packet buffer 3495 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3496 3497 // max acl payload size defined in config.h 3498 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3499 3500 // register packet handlers with transport 3501 transport->register_packet_handler(&packet_handler); 3502 3503 hci_stack->state = HCI_STATE_OFF; 3504 3505 // class of device 3506 hci_stack->class_of_device = 0x007a020c; // Smartphone 3507 3508 // bondable by default 3509 hci_stack->bondable = 1; 3510 3511 #ifdef ENABLE_CLASSIC 3512 // classic name 3513 hci_stack->local_name = default_classic_name; 3514 3515 // Master slave policy 3516 hci_stack->master_slave_policy = 1; 3517 3518 // Allow Role Switch 3519 hci_stack->allow_role_switch = 1; 3520 3521 // Default / minimum security level = 2 3522 hci_stack->gap_security_level = LEVEL_2; 3523 3524 // Default Security Mode 4 3525 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3526 3527 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3528 hci_stack->gap_required_encyrption_key_size = 7; 3529 3530 // Link Supervision Timeout 3531 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3532 3533 #endif 3534 3535 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3536 hci_stack->ssp_enable = 1; 3537 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3538 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3539 hci_stack->ssp_auto_accept = 1; 3540 3541 // Secure Connections: enable (requires support from Controller) 3542 hci_stack->secure_connections_enable = true; 3543 3544 // voice setting - signed 16 bit pcm data with CVSD over the air 3545 hci_stack->sco_voice_setting = 0x60; 3546 3547 #ifdef ENABLE_LE_CENTRAL 3548 // connection parameter to use for outgoing connections 3549 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3550 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3551 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3552 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3553 hci_stack->le_connection_latency = 4; // 4 3554 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3555 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3556 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3557 3558 // default LE Scanning 3559 hci_stack->le_scan_type = 0x1; // active 3560 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3561 hci_stack->le_scan_window = 0x30; // 30 ms 3562 #endif 3563 3564 #ifdef ENABLE_LE_PERIPHERAL 3565 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3566 #endif 3567 3568 // connection parameter range used to answer connection parameter update requests in l2cap 3569 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3570 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3571 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3572 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3573 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3574 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3575 3576 hci_state_reset(); 3577 } 3578 3579 void hci_deinit(void){ 3580 #ifdef HAVE_MALLOC 3581 if (hci_stack) { 3582 free(hci_stack); 3583 } 3584 #endif 3585 hci_stack = NULL; 3586 3587 #ifdef ENABLE_CLASSIC 3588 disable_l2cap_timeouts = 0; 3589 #endif 3590 } 3591 3592 /** 3593 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3594 */ 3595 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3596 hci_stack->chipset = chipset_driver; 3597 3598 // reset chipset driver - init is also called on power_up 3599 if (hci_stack->chipset && hci_stack->chipset->init){ 3600 hci_stack->chipset->init(hci_stack->config); 3601 } 3602 } 3603 3604 /** 3605 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3606 */ 3607 void hci_set_control(const btstack_control_t *hardware_control){ 3608 // references to used control implementation 3609 hci_stack->control = hardware_control; 3610 // init with transport config 3611 hardware_control->init(hci_stack->config); 3612 } 3613 3614 void hci_close(void){ 3615 3616 #ifdef ENABLE_CLASSIC 3617 // close remote device db 3618 if (hci_stack->link_key_db) { 3619 hci_stack->link_key_db->close(); 3620 } 3621 #endif 3622 3623 btstack_linked_list_iterator_t lit; 3624 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3625 while (btstack_linked_list_iterator_has_next(&lit)){ 3626 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3627 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3628 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3629 hci_shutdown_connection(connection); 3630 } 3631 3632 hci_power_control(HCI_POWER_OFF); 3633 3634 #ifdef HAVE_MALLOC 3635 free(hci_stack); 3636 #endif 3637 hci_stack = NULL; 3638 } 3639 3640 #ifdef HAVE_SCO_TRANSPORT 3641 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3642 hci_stack->sco_transport = sco_transport; 3643 sco_transport->register_packet_handler(&packet_handler); 3644 } 3645 #endif 3646 3647 #ifdef ENABLE_CLASSIC 3648 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3649 // validate ranage and set 3650 if (encryption_key_size < 7) return; 3651 if (encryption_key_size > 16) return; 3652 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3653 } 3654 3655 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3656 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3657 hci_stack->gap_security_mode = security_mode; 3658 return ERROR_CODE_SUCCESS; 3659 } else { 3660 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3661 } 3662 } 3663 3664 gap_security_mode_t gap_get_security_mode(void){ 3665 return hci_stack->gap_security_mode; 3666 } 3667 3668 void gap_set_security_level(gap_security_level_t security_level){ 3669 hci_stack->gap_security_level = security_level; 3670 } 3671 3672 gap_security_level_t gap_get_security_level(void){ 3673 if (hci_stack->gap_secure_connections_only_mode){ 3674 return LEVEL_4; 3675 } 3676 return hci_stack->gap_security_level; 3677 } 3678 3679 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3680 hci_stack->gap_minimal_service_security_level = security_level; 3681 } 3682 3683 void gap_set_secure_connections_only_mode(bool enable){ 3684 hci_stack->gap_secure_connections_only_mode = enable; 3685 } 3686 3687 bool gap_get_secure_connections_only_mode(void){ 3688 return hci_stack->gap_secure_connections_only_mode; 3689 } 3690 #endif 3691 3692 #ifdef ENABLE_CLASSIC 3693 void gap_set_class_of_device(uint32_t class_of_device){ 3694 hci_stack->class_of_device = class_of_device; 3695 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3696 hci_run(); 3697 } 3698 3699 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3700 hci_stack->default_link_policy_settings = default_link_policy_settings; 3701 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3702 hci_run(); 3703 } 3704 3705 void gap_set_allow_role_switch(bool allow_role_switch){ 3706 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3707 } 3708 3709 uint8_t hci_get_allow_role_switch(void){ 3710 return hci_stack->allow_role_switch; 3711 } 3712 3713 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3714 hci_stack->link_supervision_timeout = link_supervision_timeout; 3715 } 3716 3717 void hci_disable_l2cap_timeout_check(void){ 3718 disable_l2cap_timeouts = 1; 3719 } 3720 #endif 3721 3722 #ifndef HAVE_HOST_CONTROLLER_API 3723 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3724 void hci_set_bd_addr(bd_addr_t addr){ 3725 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3726 hci_stack->custom_bd_addr_set = 1; 3727 } 3728 #endif 3729 3730 // State-Module-Driver overview 3731 // state module low-level 3732 // HCI_STATE_OFF off close 3733 // HCI_STATE_INITIALIZING, on open 3734 // HCI_STATE_WORKING, on open 3735 // HCI_STATE_HALTING, on open 3736 // HCI_STATE_SLEEPING, off/sleep close 3737 // HCI_STATE_FALLING_ASLEEP on open 3738 3739 static int hci_power_control_on(void){ 3740 3741 // power on 3742 int err = 0; 3743 if (hci_stack->control && hci_stack->control->on){ 3744 err = (*hci_stack->control->on)(); 3745 } 3746 if (err){ 3747 log_error( "POWER_ON failed"); 3748 hci_emit_hci_open_failed(); 3749 return err; 3750 } 3751 3752 // int chipset driver 3753 if (hci_stack->chipset && hci_stack->chipset->init){ 3754 hci_stack->chipset->init(hci_stack->config); 3755 } 3756 3757 // init transport 3758 if (hci_stack->hci_transport->init){ 3759 hci_stack->hci_transport->init(hci_stack->config); 3760 } 3761 3762 // open transport 3763 err = hci_stack->hci_transport->open(); 3764 if (err){ 3765 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3766 if (hci_stack->control && hci_stack->control->off){ 3767 (*hci_stack->control->off)(); 3768 } 3769 hci_emit_hci_open_failed(); 3770 return err; 3771 } 3772 return 0; 3773 } 3774 3775 static void hci_power_control_off(void){ 3776 3777 log_info("hci_power_control_off"); 3778 3779 // close low-level device 3780 hci_stack->hci_transport->close(); 3781 3782 log_info("hci_power_control_off - hci_transport closed"); 3783 3784 // power off 3785 if (hci_stack->control && hci_stack->control->off){ 3786 (*hci_stack->control->off)(); 3787 } 3788 3789 log_info("hci_power_control_off - control closed"); 3790 3791 hci_stack->state = HCI_STATE_OFF; 3792 } 3793 3794 static void hci_power_control_sleep(void){ 3795 3796 log_info("hci_power_control_sleep"); 3797 3798 #if 0 3799 // don't close serial port during sleep 3800 3801 // close low-level device 3802 hci_stack->hci_transport->close(hci_stack->config); 3803 #endif 3804 3805 // sleep mode 3806 if (hci_stack->control && hci_stack->control->sleep){ 3807 (*hci_stack->control->sleep)(); 3808 } 3809 3810 hci_stack->state = HCI_STATE_SLEEPING; 3811 } 3812 3813 static int hci_power_control_wake(void){ 3814 3815 log_info("hci_power_control_wake"); 3816 3817 // wake on 3818 if (hci_stack->control && hci_stack->control->wake){ 3819 (*hci_stack->control->wake)(); 3820 } 3821 3822 #if 0 3823 // open low-level device 3824 int err = hci_stack->hci_transport->open(hci_stack->config); 3825 if (err){ 3826 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3827 if (hci_stack->control && hci_stack->control->off){ 3828 (*hci_stack->control->off)(); 3829 } 3830 hci_emit_hci_open_failed(); 3831 return err; 3832 } 3833 #endif 3834 3835 return 0; 3836 } 3837 3838 static void hci_power_transition_to_initializing(void){ 3839 // set up state machine 3840 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3841 hci_stack->hci_packet_buffer_reserved = false; 3842 hci_stack->state = HCI_STATE_INITIALIZING; 3843 hci_stack->substate = HCI_INIT_SEND_RESET; 3844 } 3845 3846 // returns error 3847 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3848 int err; 3849 switch (power_mode){ 3850 case HCI_POWER_ON: 3851 err = hci_power_control_on(); 3852 if (err != 0) { 3853 log_error("hci_power_control_on() error %d", err); 3854 return err; 3855 } 3856 hci_power_transition_to_initializing(); 3857 break; 3858 case HCI_POWER_OFF: 3859 // do nothing 3860 break; 3861 case HCI_POWER_SLEEP: 3862 // do nothing (with SLEEP == OFF) 3863 break; 3864 default: 3865 btstack_assert(false); 3866 break; 3867 } 3868 return ERROR_CODE_SUCCESS; 3869 } 3870 3871 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3872 switch (power_mode){ 3873 case HCI_POWER_ON: 3874 // do nothing 3875 break; 3876 case HCI_POWER_OFF: 3877 // no connections yet, just turn it off 3878 hci_power_control_off(); 3879 break; 3880 case HCI_POWER_SLEEP: 3881 // no connections yet, just turn it off 3882 hci_power_control_sleep(); 3883 break; 3884 default: 3885 btstack_assert(false); 3886 break; 3887 } 3888 return ERROR_CODE_SUCCESS; 3889 } 3890 3891 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3892 switch (power_mode){ 3893 case HCI_POWER_ON: 3894 // do nothing 3895 break; 3896 case HCI_POWER_OFF: 3897 // see hci_run 3898 hci_stack->state = HCI_STATE_HALTING; 3899 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3900 break; 3901 case HCI_POWER_SLEEP: 3902 // see hci_run 3903 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3904 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3905 break; 3906 default: 3907 btstack_assert(false); 3908 break; 3909 } 3910 return ERROR_CODE_SUCCESS; 3911 } 3912 3913 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3914 switch (power_mode){ 3915 case HCI_POWER_ON: 3916 hci_power_transition_to_initializing(); 3917 break; 3918 case HCI_POWER_OFF: 3919 // do nothing 3920 break; 3921 case HCI_POWER_SLEEP: 3922 // see hci_run 3923 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3924 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3925 break; 3926 default: 3927 btstack_assert(false); 3928 break; 3929 } 3930 return ERROR_CODE_SUCCESS; 3931 } 3932 3933 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3934 switch (power_mode){ 3935 case HCI_POWER_ON: 3936 hci_power_transition_to_initializing(); 3937 break; 3938 case HCI_POWER_OFF: 3939 // see hci_run 3940 hci_stack->state = HCI_STATE_HALTING; 3941 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3942 break; 3943 case HCI_POWER_SLEEP: 3944 // do nothing 3945 break; 3946 default: 3947 btstack_assert(false); 3948 break; 3949 } 3950 return ERROR_CODE_SUCCESS; 3951 } 3952 3953 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3954 int err; 3955 switch (power_mode){ 3956 case HCI_POWER_ON: 3957 err = hci_power_control_wake(); 3958 if (err) return err; 3959 hci_power_transition_to_initializing(); 3960 break; 3961 case HCI_POWER_OFF: 3962 hci_stack->state = HCI_STATE_HALTING; 3963 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3964 break; 3965 case HCI_POWER_SLEEP: 3966 // do nothing 3967 break; 3968 default: 3969 btstack_assert(false); 3970 break; 3971 } 3972 return ERROR_CODE_SUCCESS; 3973 } 3974 3975 int hci_power_control(HCI_POWER_MODE power_mode){ 3976 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3977 int err = 0; 3978 switch (hci_stack->state){ 3979 case HCI_STATE_OFF: 3980 err = hci_power_control_state_off(power_mode); 3981 break; 3982 case HCI_STATE_INITIALIZING: 3983 err = hci_power_control_state_initializing(power_mode); 3984 break; 3985 case HCI_STATE_WORKING: 3986 err = hci_power_control_state_working(power_mode); 3987 break; 3988 case HCI_STATE_HALTING: 3989 err = hci_power_control_state_halting(power_mode); 3990 break; 3991 case HCI_STATE_FALLING_ASLEEP: 3992 err = hci_power_control_state_falling_asleep(power_mode); 3993 break; 3994 case HCI_STATE_SLEEPING: 3995 err = hci_power_control_state_sleeping(power_mode); 3996 break; 3997 default: 3998 btstack_assert(false); 3999 break; 4000 } 4001 if (err != 0){ 4002 return err; 4003 } 4004 4005 // create internal event 4006 hci_emit_state(); 4007 4008 // trigger next/first action 4009 hci_run(); 4010 4011 return 0; 4012 } 4013 4014 4015 #ifdef ENABLE_CLASSIC 4016 4017 static void hci_update_scan_enable(void){ 4018 // 2 = page scan, 1 = inq scan 4019 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4020 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4021 hci_run(); 4022 } 4023 4024 void gap_discoverable_control(uint8_t enable){ 4025 if (enable) enable = 1; // normalize argument 4026 4027 if (hci_stack->discoverable == enable){ 4028 hci_emit_discoverable_enabled(hci_stack->discoverable); 4029 return; 4030 } 4031 4032 hci_stack->discoverable = enable; 4033 hci_update_scan_enable(); 4034 } 4035 4036 void gap_connectable_control(uint8_t enable){ 4037 if (enable) enable = 1; // normalize argument 4038 4039 // don't emit event 4040 if (hci_stack->connectable == enable) return; 4041 4042 hci_stack->connectable = enable; 4043 hci_update_scan_enable(); 4044 } 4045 #endif 4046 4047 void gap_local_bd_addr(bd_addr_t address_buffer){ 4048 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4049 } 4050 4051 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4052 static void hci_host_num_completed_packets(void){ 4053 4054 // create packet manually as arrays are not supported and num_commands should not get reduced 4055 hci_reserve_packet_buffer(); 4056 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4057 4058 uint16_t size = 0; 4059 uint16_t num_handles = 0; 4060 packet[size++] = 0x35; 4061 packet[size++] = 0x0c; 4062 size++; // skip param len 4063 size++; // skip num handles 4064 4065 // add { handle, packets } entries 4066 btstack_linked_item_t * it; 4067 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4068 hci_connection_t * connection = (hci_connection_t *) it; 4069 if (connection->num_packets_completed){ 4070 little_endian_store_16(packet, size, connection->con_handle); 4071 size += 2; 4072 little_endian_store_16(packet, size, connection->num_packets_completed); 4073 size += 2; 4074 // 4075 num_handles++; 4076 connection->num_packets_completed = 0; 4077 } 4078 } 4079 4080 packet[2] = size - 3; 4081 packet[3] = num_handles; 4082 4083 hci_stack->host_completed_packets = 0; 4084 4085 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4086 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4087 4088 // release packet buffer for synchronous transport implementations 4089 if (hci_transport_synchronous()){ 4090 hci_release_packet_buffer(); 4091 hci_emit_transport_packet_sent(); 4092 } 4093 } 4094 #endif 4095 4096 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4097 UNUSED(ds); 4098 hci_stack->substate = HCI_HALTING_CLOSE; 4099 // allow packet handlers to defer final shutdown 4100 hci_emit_state(); 4101 hci_run(); 4102 } 4103 4104 static bool hci_run_acl_fragments(void){ 4105 if (hci_stack->acl_fragmentation_total_size > 0u) { 4106 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4107 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4108 if (connection) { 4109 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4110 hci_send_acl_packet_fragments(connection); 4111 return true; 4112 } 4113 } else { 4114 // connection gone -> discard further fragments 4115 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4116 hci_stack->acl_fragmentation_total_size = 0; 4117 hci_stack->acl_fragmentation_pos = 0; 4118 } 4119 } 4120 return false; 4121 } 4122 4123 #ifdef ENABLE_CLASSIC 4124 static bool hci_run_general_gap_classic(void){ 4125 4126 // assert stack is working and classic is active 4127 if (hci_classic_supported() == false) return false; 4128 if (hci_stack->state != HCI_STATE_WORKING) return false; 4129 4130 // decline incoming connections 4131 if (hci_stack->decline_reason){ 4132 uint8_t reason = hci_stack->decline_reason; 4133 hci_stack->decline_reason = 0; 4134 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4135 return true; 4136 } 4137 4138 if (hci_stack->gap_tasks != 0){ 4139 hci_run_gap_tasks_classic(); 4140 return true; 4141 } 4142 4143 // start/stop inquiry 4144 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4145 uint8_t duration = hci_stack->inquiry_state; 4146 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4147 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4148 return true; 4149 } 4150 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4151 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4152 hci_send_cmd(&hci_inquiry_cancel); 4153 return true; 4154 } 4155 // remote name request 4156 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4157 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4158 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4159 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4160 return true; 4161 } 4162 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4163 // Local OOB data 4164 if (hci_stack->classic_read_local_oob_data){ 4165 hci_stack->classic_read_local_oob_data = false; 4166 if (hci_stack->local_supported_commands[1] & 0x10u){ 4167 hci_send_cmd(&hci_read_local_extended_oob_data); 4168 } else { 4169 hci_send_cmd(&hci_read_local_oob_data); 4170 } 4171 } 4172 #endif 4173 // pairing 4174 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4175 uint8_t state = hci_stack->gap_pairing_state; 4176 uint8_t pin_code[16]; 4177 switch (state){ 4178 case GAP_PAIRING_STATE_SEND_PIN: 4179 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4180 memset(pin_code, 0, 16); 4181 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4182 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4183 break; 4184 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4185 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4186 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4187 break; 4188 case GAP_PAIRING_STATE_SEND_PASSKEY: 4189 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4190 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4191 break; 4192 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4193 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4194 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4195 break; 4196 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4197 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4198 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4199 break; 4200 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4201 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4202 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4203 break; 4204 default: 4205 break; 4206 } 4207 return true; 4208 } 4209 return false; 4210 } 4211 #endif 4212 4213 #ifdef ENABLE_BLE 4214 static bool hci_run_general_gap_le(void){ 4215 4216 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4217 4218 if (hci_stack->state != HCI_STATE_WORKING) return false; 4219 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4220 4221 4222 // Phase 1: collect what to stop 4223 4224 bool scanning_stop = false; 4225 bool connecting_stop = false; 4226 bool advertising_stop = false; 4227 4228 #ifndef ENABLE_LE_CENTRAL 4229 UNUSED(scanning_stop); 4230 UNUSED(connecting_stop); 4231 #endif 4232 #ifndef ENABLE_LE_PERIPHERAL 4233 UNUSED(advertising_stop); 4234 #endif 4235 4236 // check if whitelist needs modification 4237 bool whitelist_modification_pending = false; 4238 btstack_linked_list_iterator_t lit; 4239 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4240 while (btstack_linked_list_iterator_has_next(&lit)){ 4241 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4242 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4243 whitelist_modification_pending = true; 4244 break; 4245 } 4246 } 4247 // check if resolving list needs modification 4248 bool resolving_list_modification_pending = false; 4249 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4250 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4251 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4252 resolving_list_modification_pending = true; 4253 } 4254 #endif 4255 4256 #ifdef ENABLE_LE_CENTRAL 4257 // scanning control 4258 if (hci_stack->le_scanning_active) { 4259 // stop if: 4260 // - parameter change required 4261 // - it's disabled 4262 // - whitelist change required but used for scanning 4263 // - resolving list modified 4264 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4265 if ((hci_stack->le_scanning_param_update) || 4266 !hci_stack->le_scanning_enabled || 4267 scanning_uses_whitelist || 4268 resolving_list_modification_pending){ 4269 4270 scanning_stop = true; 4271 } 4272 } 4273 #endif 4274 4275 #ifdef ENABLE_LE_CENTRAL 4276 // connecting control 4277 bool connecting_with_whitelist; 4278 switch (hci_stack->le_connecting_state){ 4279 case LE_CONNECTING_DIRECT: 4280 case LE_CONNECTING_WHITELIST: 4281 // stop connecting if: 4282 // - connecting uses white and whitelist modification pending 4283 // - if it got disabled 4284 // - resolving list modified 4285 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4286 if ((connecting_with_whitelist && whitelist_modification_pending) || 4287 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4288 resolving_list_modification_pending) { 4289 4290 connecting_stop = true; 4291 } 4292 break; 4293 default: 4294 break; 4295 } 4296 #endif 4297 4298 #ifdef ENABLE_LE_PERIPHERAL 4299 // le advertisement control 4300 if (hci_stack->le_advertisements_active){ 4301 // stop if: 4302 // - parameter change required 4303 // - it's disabled 4304 // - whitelist change required but used for advertisement filter policy 4305 // - resolving list modified 4306 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4307 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4308 if (advertising_change || 4309 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4310 (advertising_uses_whitelist & whitelist_modification_pending) || 4311 resolving_list_modification_pending) { 4312 4313 advertising_stop = true; 4314 } 4315 } 4316 #endif 4317 4318 4319 // Phase 2: stop everything that should be off during modifications 4320 4321 #ifdef ENABLE_LE_CENTRAL 4322 if (scanning_stop){ 4323 hci_stack->le_scanning_active = false; 4324 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4325 return true; 4326 } 4327 #endif 4328 4329 #ifdef ENABLE_LE_CENTRAL 4330 if (connecting_stop){ 4331 hci_send_cmd(&hci_le_create_connection_cancel); 4332 return true; 4333 } 4334 #endif 4335 4336 #ifdef ENABLE_LE_PERIPHERAL 4337 if (advertising_stop){ 4338 hci_stack->le_advertisements_active = false; 4339 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4340 return true; 4341 } 4342 #endif 4343 4344 // Phase 3: modify 4345 4346 #ifdef ENABLE_LE_CENTRAL 4347 if (hci_stack->le_scanning_param_update){ 4348 hci_stack->le_scanning_param_update = false; 4349 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4350 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4351 return true; 4352 } 4353 #endif 4354 4355 #ifdef ENABLE_LE_PERIPHERAL 4356 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4357 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4358 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4359 hci_send_cmd(&hci_le_set_advertising_parameters, 4360 hci_stack->le_advertisements_interval_min, 4361 hci_stack->le_advertisements_interval_max, 4362 hci_stack->le_advertisements_type, 4363 hci_stack->le_advertisements_own_addr_type, 4364 hci_stack->le_advertisements_direct_address_type, 4365 hci_stack->le_advertisements_direct_address, 4366 hci_stack->le_advertisements_channel_map, 4367 hci_stack->le_advertisements_filter_policy); 4368 return true; 4369 } 4370 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4371 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4372 uint8_t adv_data_clean[31]; 4373 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4374 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4375 hci_stack->le_advertisements_data_len); 4376 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4377 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4378 return true; 4379 } 4380 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4381 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4382 uint8_t scan_data_clean[31]; 4383 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4384 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4385 hci_stack->le_scan_response_data_len); 4386 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4387 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4388 return true; 4389 } 4390 #endif 4391 4392 4393 #ifdef ENABLE_LE_CENTRAL 4394 // if connect with whitelist was active and is not cancelled yet, wait until next time 4395 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4396 #endif 4397 4398 // LE Whitelist Management 4399 if (whitelist_modification_pending){ 4400 // add/remove entries 4401 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4402 while (btstack_linked_list_iterator_has_next(&lit)){ 4403 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4404 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4405 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4406 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4407 return true; 4408 } 4409 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4410 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4411 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4412 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4413 return true; 4414 } 4415 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4416 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4417 btstack_memory_whitelist_entry_free(entry); 4418 } 4419 } 4420 } 4421 4422 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4423 // LE Resolving List Management 4424 if (resolving_list_supported) { 4425 uint16_t i; 4426 switch (hci_stack->le_resolving_list_state) { 4427 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4428 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4429 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4430 return true; 4431 case LE_RESOLVING_LIST_READ_SIZE: 4432 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4433 hci_send_cmd(&hci_le_read_resolving_list_size); 4434 return true; 4435 case LE_RESOLVING_LIST_SEND_CLEAR: 4436 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4437 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4438 sizeof(hci_stack->le_resolving_list_add_entries)); 4439 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4440 sizeof(hci_stack->le_resolving_list_remove_entries)); 4441 hci_send_cmd(&hci_le_clear_resolving_list); 4442 return true; 4443 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4444 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4445 uint8_t offset = i >> 3; 4446 uint8_t mask = 1 << (i & 7); 4447 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4448 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4449 bd_addr_t peer_identity_addreses; 4450 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4451 sm_key_t peer_irk; 4452 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4453 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4454 4455 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4456 // trigger whitelist entry 'update' (work around for controller bug) 4457 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4458 while (btstack_linked_list_iterator_has_next(&lit)) { 4459 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4460 if (entry->address_type != peer_identity_addr_type) continue; 4461 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4462 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4463 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4464 } 4465 #endif 4466 4467 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4468 peer_identity_addreses); 4469 return true; 4470 } 4471 4472 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4473 4474 /* fall through */ 4475 4476 case LE_RESOLVING_LIST_ADD_ENTRIES: 4477 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4478 uint8_t offset = i >> 3; 4479 uint8_t mask = 1 << (i & 7); 4480 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4481 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4482 bd_addr_t peer_identity_addreses; 4483 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4484 sm_key_t peer_irk; 4485 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4486 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4487 const uint8_t *local_irk = gap_get_persistent_irk(); 4488 // command uses format specifier 'P' that stores 16-byte value without flip 4489 uint8_t local_irk_flipped[16]; 4490 uint8_t peer_irk_flipped[16]; 4491 reverse_128(local_irk, local_irk_flipped); 4492 reverse_128(peer_irk, peer_irk_flipped); 4493 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4494 peer_irk_flipped, local_irk_flipped); 4495 return true; 4496 } 4497 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4498 break; 4499 4500 default: 4501 break; 4502 } 4503 } 4504 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4505 #endif 4506 4507 // Phase 4: restore state 4508 4509 #ifdef ENABLE_LE_CENTRAL 4510 // re-start scanning 4511 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4512 hci_stack->le_scanning_active = true; 4513 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4514 return true; 4515 } 4516 #endif 4517 4518 #ifdef ENABLE_LE_CENTRAL 4519 // re-start connecting 4520 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4521 bd_addr_t null_addr; 4522 memset(null_addr, 0, 6); 4523 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4524 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4525 hci_send_cmd(&hci_le_create_connection, 4526 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4527 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4528 1, // use whitelist 4529 0, // peer address type 4530 null_addr, // peer bd addr 4531 hci_stack->le_connection_own_addr_type, // our addr type: 4532 hci_stack->le_connection_interval_min, // conn interval min 4533 hci_stack->le_connection_interval_max, // conn interval max 4534 hci_stack->le_connection_latency, // conn latency 4535 hci_stack->le_supervision_timeout, // conn latency 4536 hci_stack->le_minimum_ce_length, // min ce length 4537 hci_stack->le_maximum_ce_length // max ce length 4538 ); 4539 return true; 4540 } 4541 #endif 4542 4543 #ifdef ENABLE_LE_PERIPHERAL 4544 // re-start advertising 4545 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4546 // check if advertisements should be enabled given 4547 hci_stack->le_advertisements_active = true; 4548 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4549 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4550 return true; 4551 } 4552 #endif 4553 4554 return false; 4555 } 4556 #endif 4557 4558 static bool hci_run_general_pending_commands(void){ 4559 btstack_linked_item_t * it; 4560 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4561 hci_connection_t * connection = (hci_connection_t *) it; 4562 4563 switch(connection->state){ 4564 case SEND_CREATE_CONNECTION: 4565 switch(connection->address_type){ 4566 #ifdef ENABLE_CLASSIC 4567 case BD_ADDR_TYPE_ACL: 4568 log_info("sending hci_create_connection"); 4569 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4570 break; 4571 #endif 4572 default: 4573 #ifdef ENABLE_BLE 4574 #ifdef ENABLE_LE_CENTRAL 4575 log_info("sending hci_le_create_connection"); 4576 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4577 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4578 hci_send_cmd(&hci_le_create_connection, 4579 hci_stack->le_connection_scan_interval, // conn scan interval 4580 hci_stack->le_connection_scan_window, // conn scan windows 4581 0, // don't use whitelist 4582 connection->address_type, // peer address type 4583 connection->address, // peer bd addr 4584 hci_stack->le_connection_own_addr_type, // our addr type: 4585 hci_stack->le_connection_interval_min, // conn interval min 4586 hci_stack->le_connection_interval_max, // conn interval max 4587 hci_stack->le_connection_latency, // conn latency 4588 hci_stack->le_supervision_timeout, // conn latency 4589 hci_stack->le_minimum_ce_length, // min ce length 4590 hci_stack->le_maximum_ce_length // max ce length 4591 ); 4592 connection->state = SENT_CREATE_CONNECTION; 4593 #endif 4594 #endif 4595 break; 4596 } 4597 return true; 4598 4599 #ifdef ENABLE_CLASSIC 4600 case RECEIVED_CONNECTION_REQUEST: 4601 connection->role = HCI_ROLE_SLAVE; 4602 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4603 log_info("sending hci_accept_connection_request"); 4604 connection->state = ACCEPTED_CONNECTION_REQUEST; 4605 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4606 } 4607 return true; 4608 #endif 4609 4610 #ifdef ENABLE_BLE 4611 #ifdef ENABLE_LE_CENTRAL 4612 case SEND_CANCEL_CONNECTION: 4613 connection->state = SENT_CANCEL_CONNECTION; 4614 hci_send_cmd(&hci_le_create_connection_cancel); 4615 return true; 4616 #endif 4617 #endif 4618 case SEND_DISCONNECT: 4619 connection->state = SENT_DISCONNECT; 4620 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4621 return true; 4622 4623 default: 4624 break; 4625 } 4626 4627 // no further commands if connection is about to get shut down 4628 if (connection->state == SENT_DISCONNECT) continue; 4629 4630 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4631 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4632 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4633 return true; 4634 } 4635 4636 #ifdef ENABLE_CLASSIC 4637 4638 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4639 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4640 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4641 return true; 4642 } 4643 4644 // Handling link key request requires remote supported features 4645 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4646 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4647 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4648 4649 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4650 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4651 if (have_link_key && security_level_sufficient){ 4652 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4653 } else { 4654 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4655 } 4656 return true; 4657 } 4658 4659 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4660 log_info("denying to pin request"); 4661 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4662 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4663 return true; 4664 } 4665 4666 // security assessment requires remote features 4667 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4668 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4669 hci_ssp_assess_security_on_io_cap_request(connection); 4670 // 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 4671 } 4672 4673 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4674 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4675 // set authentication requirements: 4676 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4677 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4678 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4679 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4680 authreq |= 1; 4681 } 4682 bool bonding = hci_stack->bondable; 4683 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4684 // if we have received IO Cap Response, we're in responder role 4685 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4686 if (bonding && !remote_bonding){ 4687 log_info("Remote not bonding, dropping local flag"); 4688 bonding = false; 4689 } 4690 } 4691 if (bonding){ 4692 if (connection->bonding_flags & BONDING_DEDICATED){ 4693 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4694 } else { 4695 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4696 } 4697 } 4698 uint8_t have_oob_data = 0; 4699 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4700 if (connection->classic_oob_c_192 != NULL){ 4701 have_oob_data |= 1; 4702 } 4703 if (connection->classic_oob_c_256 != NULL){ 4704 have_oob_data |= 2; 4705 } 4706 #endif 4707 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4708 return true; 4709 } 4710 4711 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4712 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4713 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4714 return true; 4715 } 4716 4717 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4718 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4719 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4720 const uint8_t zero[16] = { 0 }; 4721 const uint8_t * r_192 = zero; 4722 const uint8_t * c_192 = zero; 4723 const uint8_t * r_256 = zero; 4724 const uint8_t * c_256 = zero; 4725 // verify P-256 OOB 4726 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4727 c_256 = connection->classic_oob_c_256; 4728 if (connection->classic_oob_r_256 != NULL) { 4729 r_256 = connection->classic_oob_r_256; 4730 } 4731 } 4732 // verify P-192 OOB 4733 if ((connection->classic_oob_c_192 != NULL)) { 4734 c_192 = connection->classic_oob_c_192; 4735 if (connection->classic_oob_r_192 != NULL) { 4736 r_192 = connection->classic_oob_r_192; 4737 } 4738 } 4739 4740 // assess security 4741 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4742 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4743 if (need_level_4 && !can_reach_level_4){ 4744 log_info("Level 4 required, but not possible -> abort"); 4745 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4746 // send oob negative reply 4747 c_256 = NULL; 4748 c_192 = NULL; 4749 } 4750 4751 // Reply 4752 if (c_256 != zero) { 4753 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4754 } else if (c_192 != zero){ 4755 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4756 } else { 4757 hci_stack->classic_oob_con_handle = connection->con_handle; 4758 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4759 } 4760 return true; 4761 } 4762 #endif 4763 4764 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4765 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4766 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4767 return true; 4768 } 4769 4770 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4771 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4772 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4773 return true; 4774 } 4775 4776 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4777 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4778 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4779 return true; 4780 } 4781 4782 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4783 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4784 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4785 connection->state = SENT_DISCONNECT; 4786 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4787 return true; 4788 } 4789 4790 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4791 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4792 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4793 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4794 return true; 4795 } 4796 4797 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4798 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4799 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4800 return true; 4801 } 4802 4803 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4804 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4805 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4806 return true; 4807 } 4808 4809 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4810 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4811 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4812 return true; 4813 } 4814 4815 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4816 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4817 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4818 return true; 4819 } 4820 4821 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4822 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4823 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4824 return true; 4825 } 4826 #endif 4827 4828 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4829 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4830 #ifdef ENABLE_CLASSIC 4831 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4832 #endif 4833 if (connection->state != SENT_DISCONNECT){ 4834 connection->state = SENT_DISCONNECT; 4835 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4836 return true; 4837 } 4838 } 4839 4840 #ifdef ENABLE_CLASSIC 4841 uint16_t sniff_min_interval; 4842 switch (connection->sniff_min_interval){ 4843 case 0: 4844 break; 4845 case 0xffff: 4846 connection->sniff_min_interval = 0; 4847 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4848 return true; 4849 default: 4850 sniff_min_interval = connection->sniff_min_interval; 4851 connection->sniff_min_interval = 0; 4852 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4853 return true; 4854 } 4855 4856 if (connection->sniff_subrating_max_latency != 0xffff){ 4857 uint16_t max_latency = connection->sniff_subrating_max_latency; 4858 connection->sniff_subrating_max_latency = 0; 4859 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4860 return true; 4861 } 4862 4863 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4864 uint8_t service_type = (uint8_t) connection->qos_service_type; 4865 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4866 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); 4867 return true; 4868 } 4869 4870 if (connection->request_role != HCI_ROLE_INVALID){ 4871 hci_role_t role = connection->request_role; 4872 connection->request_role = HCI_ROLE_INVALID; 4873 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4874 return true; 4875 } 4876 #endif 4877 4878 #ifdef ENABLE_BLE 4879 switch (connection->le_con_parameter_update_state){ 4880 // response to L2CAP CON PARAMETER UPDATE REQUEST 4881 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4882 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4883 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4884 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4885 0x0000, 0xffff); 4886 return true; 4887 case CON_PARAMETER_UPDATE_REPLY: 4888 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4889 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4890 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4891 0x0000, 0xffff); 4892 return true; 4893 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4894 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4895 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4896 return true; 4897 default: 4898 break; 4899 } 4900 if (connection->le_phy_update_all_phys != 0xffu){ 4901 uint8_t all_phys = connection->le_phy_update_all_phys; 4902 connection->le_phy_update_all_phys = 0xff; 4903 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); 4904 return true; 4905 } 4906 #endif 4907 } 4908 return false; 4909 } 4910 4911 static void hci_run(void){ 4912 4913 bool done; 4914 4915 // send continuation fragments first, as they block the prepared packet buffer 4916 done = hci_run_acl_fragments(); 4917 if (done) return; 4918 4919 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4920 // send host num completed packets next as they don't require num_cmd_packets > 0 4921 if (!hci_can_send_comand_packet_transport()) return; 4922 if (hci_stack->host_completed_packets){ 4923 hci_host_num_completed_packets(); 4924 return; 4925 } 4926 #endif 4927 4928 if (!hci_can_send_command_packet_now()) return; 4929 4930 // global/non-connection oriented commands 4931 4932 4933 #ifdef ENABLE_CLASSIC 4934 // general gap classic 4935 done = hci_run_general_gap_classic(); 4936 if (done) return; 4937 #endif 4938 4939 #ifdef ENABLE_BLE 4940 // general gap le 4941 done = hci_run_general_gap_le(); 4942 if (done) return; 4943 #endif 4944 4945 // send pending HCI commands 4946 done = hci_run_general_pending_commands(); 4947 if (done) return; 4948 4949 // stack state sub statemachines 4950 hci_connection_t * connection; 4951 switch (hci_stack->state){ 4952 case HCI_STATE_INITIALIZING: 4953 hci_initializing_run(); 4954 break; 4955 4956 case HCI_STATE_HALTING: 4957 4958 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4959 switch (hci_stack->substate){ 4960 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4961 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4962 4963 #ifdef ENABLE_BLE 4964 #ifdef ENABLE_LE_CENTRAL 4965 // free whitelist entries 4966 { 4967 btstack_linked_list_iterator_t lit; 4968 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4969 while (btstack_linked_list_iterator_has_next(&lit)){ 4970 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4971 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4972 btstack_memory_whitelist_entry_free(entry); 4973 } 4974 } 4975 #endif 4976 #endif 4977 // close all open connections 4978 connection = (hci_connection_t *) hci_stack->connections; 4979 if (connection){ 4980 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4981 if (!hci_can_send_command_packet_now()) return; 4982 4983 // check state 4984 if (connection->state == SENT_DISCONNECT) return; 4985 connection->state = SENT_DISCONNECT; 4986 4987 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4988 4989 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4990 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4991 4992 // ... which would be ignored anyway as we shutdown (free) the connection now 4993 hci_shutdown_connection(connection); 4994 4995 // finally, send the disconnect command 4996 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4997 return; 4998 } 4999 5000 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5001 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5002 log_info("HCI_STATE_HALTING: wait 50 ms"); 5003 hci_stack->substate = HCI_HALTING_W4_TIMER; 5004 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5005 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5006 btstack_run_loop_add_timer(&hci_stack->timeout); 5007 break; 5008 } 5009 5010 /* fall through */ 5011 5012 case HCI_HALTING_CLOSE: 5013 log_info("HCI_STATE_HALTING, calling off"); 5014 5015 // switch mode 5016 hci_power_control_off(); 5017 5018 log_info("HCI_STATE_HALTING, emitting state"); 5019 hci_emit_state(); 5020 log_info("HCI_STATE_HALTING, done"); 5021 break; 5022 5023 case HCI_HALTING_W4_TIMER: 5024 // keep waiting 5025 5026 break; 5027 default: 5028 break; 5029 } 5030 5031 break; 5032 5033 case HCI_STATE_FALLING_ASLEEP: 5034 switch(hci_stack->substate) { 5035 case HCI_FALLING_ASLEEP_DISCONNECT: 5036 log_info("HCI_STATE_FALLING_ASLEEP"); 5037 // close all open connections 5038 connection = (hci_connection_t *) hci_stack->connections; 5039 if (connection){ 5040 5041 // send disconnect 5042 if (!hci_can_send_command_packet_now()) return; 5043 5044 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5045 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5046 5047 // send disconnected event right away - causes higher layer connections to get closed, too. 5048 hci_shutdown_connection(connection); 5049 return; 5050 } 5051 5052 if (hci_classic_supported()){ 5053 // disable page and inquiry scan 5054 if (!hci_can_send_command_packet_now()) return; 5055 5056 log_info("HCI_STATE_HALTING, disabling inq scans"); 5057 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5058 5059 // continue in next sub state 5060 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5061 break; 5062 } 5063 5064 /* fall through */ 5065 5066 case HCI_FALLING_ASLEEP_COMPLETE: 5067 log_info("HCI_STATE_HALTING, calling sleep"); 5068 // switch mode 5069 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5070 hci_emit_state(); 5071 break; 5072 5073 default: 5074 break; 5075 } 5076 break; 5077 5078 default: 5079 break; 5080 } 5081 } 5082 5083 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5084 // house-keeping 5085 5086 #ifdef ENABLE_CLASSIC 5087 bd_addr_t addr; 5088 hci_connection_t * conn; 5089 #endif 5090 #ifdef ENABLE_LE_CENTRAL 5091 uint8_t initiator_filter_policy; 5092 #endif 5093 5094 uint16_t opcode = little_endian_read_16(packet, 0); 5095 switch (opcode) { 5096 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5097 hci_stack->loopback_mode = packet[3]; 5098 break; 5099 5100 #ifdef ENABLE_CLASSIC 5101 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5102 reverse_bd_addr(&packet[3], addr); 5103 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5104 5105 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5106 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5107 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5108 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5109 } 5110 5111 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5112 if (!conn) { 5113 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5114 if (!conn) { 5115 // notify client that alloc failed 5116 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5117 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5118 } 5119 conn->state = SEND_CREATE_CONNECTION; 5120 conn->role = HCI_ROLE_MASTER; 5121 } 5122 5123 conn->con_handle = HCI_CON_HANDLE_INVALID; 5124 conn->role = HCI_ROLE_INVALID; 5125 5126 log_info("conn state %u", conn->state); 5127 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5128 switch (conn->state) { 5129 // if connection active exists 5130 case OPEN: 5131 // and OPEN, emit connection complete command 5132 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5133 // packet not sent to controller 5134 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5135 case RECEIVED_DISCONNECTION_COMPLETE: 5136 // create connection triggered in disconnect complete event, let's do it now 5137 break; 5138 case SEND_CREATE_CONNECTION: 5139 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5140 break; 5141 default: 5142 // otherwise, just ignore as it is already in the open process 5143 // packet not sent to controller 5144 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5145 } 5146 conn->state = SENT_CREATE_CONNECTION; 5147 5148 // track outgoing connection 5149 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5150 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5151 break; 5152 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5153 if (hci_stack->link_key_db) { 5154 reverse_bd_addr(&packet[3], addr); 5155 hci_stack->link_key_db->delete_link_key(addr); 5156 } 5157 break; 5158 5159 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5160 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5161 // setup_synchronous_connection? Voice setting at offset 22 5162 // TODO: compare to current setting if sco connection already active 5163 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5164 break; 5165 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5166 // accept_synchronus_connection? Voice setting at offset 18 5167 // TODO: compare to current setting if sco connection already active 5168 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5169 break; 5170 #endif 5171 #endif 5172 5173 #ifdef ENABLE_BLE 5174 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5175 hci_stack->le_random_address_set = 1; 5176 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5177 break; 5178 #ifdef ENABLE_LE_PERIPHERAL 5179 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5180 hci_stack->le_advertisements_active = packet[3] != 0; 5181 break; 5182 #endif 5183 #ifdef ENABLE_LE_CENTRAL 5184 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5185 // white list used? 5186 initiator_filter_policy = packet[7]; 5187 switch (initiator_filter_policy) { 5188 case 0: 5189 // whitelist not used 5190 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5191 break; 5192 case 1: 5193 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5194 break; 5195 default: 5196 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5197 break; 5198 } 5199 // track outgoing connection 5200 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5201 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5202 break; 5203 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5204 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5205 break; 5206 #endif 5207 #endif 5208 default: 5209 break; 5210 } 5211 5212 hci_stack->num_cmd_packets--; 5213 5214 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5215 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5216 if (err != 0){ 5217 return ERROR_CODE_HARDWARE_FAILURE; 5218 } 5219 return ERROR_CODE_SUCCESS; 5220 } 5221 5222 // disconnect because of security block 5223 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5224 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5225 if (!connection) return; 5226 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5227 } 5228 5229 5230 // Configure Secure Simple Pairing 5231 5232 #ifdef ENABLE_CLASSIC 5233 5234 // enable will enable SSP during init 5235 void gap_ssp_set_enable(int enable){ 5236 hci_stack->ssp_enable = enable; 5237 } 5238 5239 static int hci_local_ssp_activated(void){ 5240 return gap_ssp_supported() && hci_stack->ssp_enable; 5241 } 5242 5243 // if set, BTstack will respond to io capability request using authentication requirement 5244 void gap_ssp_set_io_capability(int io_capability){ 5245 hci_stack->ssp_io_capability = io_capability; 5246 } 5247 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5248 hci_stack->ssp_authentication_requirement = authentication_requirement; 5249 } 5250 5251 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5252 void gap_ssp_set_auto_accept(int auto_accept){ 5253 hci_stack->ssp_auto_accept = auto_accept; 5254 } 5255 5256 void gap_secure_connections_enable(bool enable){ 5257 hci_stack->secure_connections_enable = enable; 5258 } 5259 5260 #endif 5261 5262 // va_list part of hci_send_cmd 5263 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5264 if (!hci_can_send_command_packet_now()){ 5265 log_error("hci_send_cmd called but cannot send packet now"); 5266 return ERROR_CODE_COMMAND_DISALLOWED; 5267 } 5268 5269 // for HCI INITIALIZATION 5270 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5271 hci_stack->last_cmd_opcode = cmd->opcode; 5272 5273 hci_reserve_packet_buffer(); 5274 uint8_t * packet = hci_stack->hci_packet_buffer; 5275 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5276 uint8_t status = hci_send_cmd_packet(packet, size); 5277 5278 // release packet buffer on error or for synchronous transport implementations 5279 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5280 hci_release_packet_buffer(); 5281 hci_emit_transport_packet_sent(); 5282 } 5283 5284 return status; 5285 } 5286 5287 /** 5288 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5289 */ 5290 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5291 va_list argptr; 5292 va_start(argptr, cmd); 5293 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5294 va_end(argptr); 5295 return status; 5296 } 5297 5298 // Create various non-HCI events. 5299 // TODO: generalize, use table similar to hci_create_command 5300 5301 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5302 // dump packet 5303 if (dump) { 5304 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5305 } 5306 5307 // dispatch to all event handlers 5308 btstack_linked_list_iterator_t it; 5309 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5310 while (btstack_linked_list_iterator_has_next(&it)){ 5311 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5312 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5313 } 5314 } 5315 5316 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5317 if (!hci_stack->acl_packet_handler) return; 5318 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5319 } 5320 5321 #ifdef ENABLE_CLASSIC 5322 static void hci_notify_if_sco_can_send_now(void){ 5323 // notify SCO sender if waiting 5324 if (!hci_stack->sco_waiting_for_can_send_now) return; 5325 if (hci_can_send_sco_packet_now()){ 5326 hci_stack->sco_waiting_for_can_send_now = 0; 5327 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5328 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5329 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5330 } 5331 } 5332 5333 // parsing end emitting has been merged to reduce code size 5334 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5335 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5336 5337 uint8_t * eir_data; 5338 ad_context_t context; 5339 const uint8_t * name; 5340 uint8_t name_len; 5341 5342 if (size < 3) return; 5343 5344 int event_type = hci_event_packet_get_type(packet); 5345 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5346 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5347 5348 switch (event_type){ 5349 case HCI_EVENT_INQUIRY_RESULT: 5350 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5351 if (size != (3 + (num_responses * 14))) return; 5352 break; 5353 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5354 if (size != 257) return; 5355 if (num_responses != 1) return; 5356 break; 5357 default: 5358 return; 5359 } 5360 5361 // event[1] is set at the end 5362 int i; 5363 for (i=0; i<num_responses;i++){ 5364 memset(event, 0, sizeof(event)); 5365 event[0] = GAP_EVENT_INQUIRY_RESULT; 5366 uint8_t event_size = 27; // if name is not set by EIR 5367 5368 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5369 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5370 (void)memcpy(&event[9], 5371 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5372 3); // class of device 5373 (void)memcpy(&event[12], 5374 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5375 2); // clock offset 5376 5377 switch (event_type){ 5378 case HCI_EVENT_INQUIRY_RESULT: 5379 // 14,15,16,17 = 0, size 18 5380 break; 5381 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5382 event[14] = 1; 5383 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5384 // 16,17 = 0, size 18 5385 break; 5386 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5387 event[14] = 1; 5388 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5389 // EIR packets only contain a single inquiry response 5390 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5391 name = NULL; 5392 // Iterate over EIR data 5393 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5394 uint8_t data_type = ad_iterator_get_data_type(&context); 5395 uint8_t data_size = ad_iterator_get_data_len(&context); 5396 const uint8_t * data = ad_iterator_get_data(&context); 5397 // Prefer Complete Local Name over Shortened Local Name 5398 switch (data_type){ 5399 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5400 if (name) continue; 5401 /* fall through */ 5402 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5403 name = data; 5404 name_len = data_size; 5405 break; 5406 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5407 if (data_size != 8) break; 5408 event[16] = 1; 5409 memcpy(&event[17], data, 8); 5410 break; 5411 default: 5412 break; 5413 } 5414 } 5415 if (name){ 5416 event[25] = 1; 5417 // truncate name if needed 5418 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5419 event[26] = len; 5420 (void)memcpy(&event[27], name, len); 5421 event_size += len; 5422 } 5423 break; 5424 default: 5425 return; 5426 } 5427 event[1] = event_size - 2; 5428 hci_emit_event(event, event_size, 1); 5429 } 5430 } 5431 #endif 5432 5433 void hci_emit_state(void){ 5434 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5435 uint8_t event[3]; 5436 event[0] = BTSTACK_EVENT_STATE; 5437 event[1] = sizeof(event) - 2u; 5438 event[2] = hci_stack->state; 5439 hci_emit_event(event, sizeof(event), 1); 5440 } 5441 5442 #ifdef ENABLE_CLASSIC 5443 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5444 uint8_t event[13]; 5445 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5446 event[1] = sizeof(event) - 2; 5447 event[2] = status; 5448 little_endian_store_16(event, 3, con_handle); 5449 reverse_bd_addr(address, &event[5]); 5450 event[11] = 1; // ACL connection 5451 event[12] = 0; // encryption disabled 5452 hci_emit_event(event, sizeof(event), 1); 5453 } 5454 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5455 if (disable_l2cap_timeouts) return; 5456 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5457 uint8_t event[4]; 5458 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5459 event[1] = sizeof(event) - 2; 5460 little_endian_store_16(event, 2, conn->con_handle); 5461 hci_emit_event(event, sizeof(event), 1); 5462 } 5463 #endif 5464 5465 #ifdef ENABLE_BLE 5466 #ifdef ENABLE_LE_CENTRAL 5467 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){ 5468 uint8_t event[21]; 5469 event[0] = HCI_EVENT_LE_META; 5470 event[1] = sizeof(event) - 2u; 5471 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5472 event[3] = status; 5473 little_endian_store_16(event, 4, con_handle); 5474 event[6] = 0; // TODO: role 5475 event[7] = address_type; 5476 reverse_bd_addr(address, &event[8]); 5477 little_endian_store_16(event, 14, 0); // interval 5478 little_endian_store_16(event, 16, 0); // latency 5479 little_endian_store_16(event, 18, 0); // supervision timeout 5480 event[20] = 0; // master clock accuracy 5481 hci_emit_event(event, sizeof(event), 1); 5482 } 5483 #endif 5484 #endif 5485 5486 static void hci_emit_transport_packet_sent(void){ 5487 // notify upper stack that it might be possible to send again 5488 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5489 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5490 } 5491 5492 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5493 uint8_t event[6]; 5494 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5495 event[1] = sizeof(event) - 2u; 5496 event[2] = 0; // status = OK 5497 little_endian_store_16(event, 3, con_handle); 5498 event[5] = reason; 5499 hci_emit_event(event, sizeof(event), 1); 5500 } 5501 5502 static void hci_emit_nr_connections_changed(void){ 5503 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5504 uint8_t event[3]; 5505 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5506 event[1] = sizeof(event) - 2u; 5507 event[2] = nr_hci_connections(); 5508 hci_emit_event(event, sizeof(event), 1); 5509 } 5510 5511 static void hci_emit_hci_open_failed(void){ 5512 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5513 uint8_t event[2]; 5514 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5515 event[1] = sizeof(event) - 2u; 5516 hci_emit_event(event, sizeof(event), 1); 5517 } 5518 5519 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5520 log_info("hci_emit_dedicated_bonding_result %u ", status); 5521 uint8_t event[9]; 5522 int pos = 0; 5523 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5524 event[pos++] = sizeof(event) - 2u; 5525 event[pos++] = status; 5526 reverse_bd_addr(address, &event[pos]); 5527 hci_emit_event(event, sizeof(event), 1); 5528 } 5529 5530 5531 #ifdef ENABLE_CLASSIC 5532 5533 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5534 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5535 uint8_t event[5]; 5536 int pos = 0; 5537 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5538 event[pos++] = sizeof(event) - 2; 5539 little_endian_store_16(event, 2, con_handle); 5540 pos += 2; 5541 event[pos++] = level; 5542 hci_emit_event(event, sizeof(event), 1); 5543 } 5544 5545 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5546 if (!connection) return LEVEL_0; 5547 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5548 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5549 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5550 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5551 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5552 // LEVEL 4 always requires 128 bit encrytion key size 5553 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5554 security_level = LEVEL_3; 5555 } 5556 return security_level; 5557 } 5558 5559 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5560 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5561 uint8_t event[3]; 5562 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5563 event[1] = sizeof(event) - 2; 5564 event[2] = enabled; 5565 hci_emit_event(event, sizeof(event), 1); 5566 } 5567 5568 // query if remote side supports eSCO 5569 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5570 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5571 if (!connection) return false; 5572 return (connection->remote_supported_features[0] & 1) != 0; 5573 } 5574 5575 static bool hci_ssp_supported(hci_connection_t * connection){ 5576 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5577 return (connection->bonding_flags & mask) == mask; 5578 } 5579 5580 // query if remote side supports SSP 5581 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5583 if (!connection) return false; 5584 return hci_ssp_supported(connection) ? 1 : 0; 5585 } 5586 5587 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5588 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5589 } 5590 5591 /** 5592 * Check if remote supported features query has completed 5593 */ 5594 bool hci_remote_features_available(hci_con_handle_t handle){ 5595 hci_connection_t * connection = hci_connection_for_handle(handle); 5596 if (!connection) return false; 5597 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5598 } 5599 5600 /** 5601 * Trigger remote supported features query 5602 */ 5603 void hci_remote_features_query(hci_con_handle_t con_handle){ 5604 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5605 if (!connection) return; 5606 if ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) return; 5607 connection->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5608 hci_run(); 5609 } 5610 5611 // GAP API 5612 /** 5613 * @bbrief enable/disable bonding. default is enabled 5614 * @praram enabled 5615 */ 5616 void gap_set_bondable_mode(int enable){ 5617 hci_stack->bondable = enable ? 1 : 0; 5618 } 5619 /** 5620 * @brief Get bondable mode. 5621 * @return 1 if bondable 5622 */ 5623 int gap_get_bondable_mode(void){ 5624 return hci_stack->bondable; 5625 } 5626 5627 /** 5628 * @brief map link keys to security levels 5629 */ 5630 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5631 switch (link_key_type){ 5632 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5633 return LEVEL_4; 5634 case COMBINATION_KEY: 5635 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5636 return LEVEL_3; 5637 default: 5638 return LEVEL_2; 5639 } 5640 } 5641 5642 /** 5643 * @brief map link keys to secure connection yes/no 5644 */ 5645 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5646 switch (link_key_type){ 5647 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5648 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5649 return 1; 5650 default: 5651 return 0; 5652 } 5653 } 5654 5655 /** 5656 * @brief map link keys to authenticated 5657 */ 5658 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5659 switch (link_key_type){ 5660 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5661 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5662 return 1; 5663 default: 5664 return 0; 5665 } 5666 } 5667 5668 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5669 log_info("gap_mitm_protection_required_for_security_level %u", level); 5670 return level > LEVEL_2; 5671 } 5672 5673 /** 5674 * @brief get current security level 5675 */ 5676 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5677 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5678 if (!connection) return LEVEL_0; 5679 return gap_security_level_for_connection(connection); 5680 } 5681 5682 /** 5683 * @brief request connection to device to 5684 * @result GAP_AUTHENTICATION_RESULT 5685 */ 5686 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5687 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5688 if (!connection){ 5689 hci_emit_security_level(con_handle, LEVEL_0); 5690 return; 5691 } 5692 5693 btstack_assert(hci_is_le_connection(connection) == false); 5694 5695 // 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) 5696 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5697 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5698 requested_level = LEVEL_4; 5699 } 5700 5701 gap_security_level_t current_level = gap_security_level(con_handle); 5702 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5703 requested_level, connection->requested_security_level, current_level); 5704 5705 // authentication active if authentication request was sent or planned level > 0 5706 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5707 if (authentication_active){ 5708 // authentication already active 5709 if (connection->requested_security_level < requested_level){ 5710 // increase requested level as new level is higher 5711 // TODO: handle re-authentication when done 5712 connection->requested_security_level = requested_level; 5713 } 5714 } else { 5715 // no request active, notify if security sufficient 5716 if (requested_level <= current_level){ 5717 hci_emit_security_level(con_handle, current_level); 5718 return; 5719 } 5720 5721 // store request 5722 connection->requested_security_level = requested_level; 5723 5724 // start to authenticate connection 5725 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5726 hci_run(); 5727 } 5728 } 5729 5730 /** 5731 * @brief start dedicated bonding with device. disconnect after bonding 5732 * @param device 5733 * @param request MITM protection 5734 * @result GAP_DEDICATED_BONDING_COMPLETE 5735 */ 5736 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5737 5738 // create connection state machine 5739 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5740 5741 if (!connection){ 5742 return BTSTACK_MEMORY_ALLOC_FAILED; 5743 } 5744 5745 // delete linkn key 5746 gap_drop_link_key_for_bd_addr(device); 5747 5748 // configure LEVEL_2/3, dedicated bonding 5749 connection->state = SEND_CREATE_CONNECTION; 5750 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5751 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5752 connection->bonding_flags = BONDING_DEDICATED; 5753 5754 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5755 5756 // handle: connnection failure (connection complete != ok) 5757 // handle: authentication failure 5758 // handle: disconnect on done 5759 5760 hci_run(); 5761 5762 return 0; 5763 } 5764 5765 void gap_set_local_name(const char * local_name){ 5766 hci_stack->local_name = local_name; 5767 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5768 // also update EIR if not set by user 5769 if (hci_stack->eir_data == NULL){ 5770 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5771 } 5772 hci_run(); 5773 } 5774 #endif 5775 5776 5777 #ifdef ENABLE_BLE 5778 5779 #ifdef ENABLE_LE_CENTRAL 5780 void gap_start_scan(void){ 5781 hci_stack->le_scanning_enabled = true; 5782 hci_run(); 5783 } 5784 5785 void gap_stop_scan(void){ 5786 hci_stack->le_scanning_enabled = false; 5787 hci_run(); 5788 } 5789 5790 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5791 hci_stack->le_scan_type = scan_type; 5792 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5793 hci_stack->le_scan_interval = scan_interval; 5794 hci_stack->le_scan_window = scan_window; 5795 hci_stack->le_scanning_param_update = true; 5796 hci_run(); 5797 } 5798 5799 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5800 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5801 } 5802 5803 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5804 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5805 if (!conn){ 5806 // disallow if le connection is already outgoing 5807 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5808 log_error("le connection already active"); 5809 return ERROR_CODE_COMMAND_DISALLOWED; 5810 } 5811 5812 log_info("gap_connect: no connection exists yet, creating context"); 5813 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5814 if (!conn){ 5815 // notify client that alloc failed 5816 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5817 log_info("gap_connect: failed to alloc hci_connection_t"); 5818 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5819 } 5820 5821 // set le connecting state 5822 if (hci_is_le_connection_type(addr_type)){ 5823 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5824 } 5825 5826 conn->state = SEND_CREATE_CONNECTION; 5827 log_info("gap_connect: send create connection next"); 5828 hci_run(); 5829 return ERROR_CODE_SUCCESS; 5830 } 5831 5832 if (!hci_is_le_connection(conn) || 5833 (conn->state == SEND_CREATE_CONNECTION) || 5834 (conn->state == SENT_CREATE_CONNECTION)) { 5835 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5836 log_error("gap_connect: classic connection or connect is already being created"); 5837 return GATT_CLIENT_IN_WRONG_STATE; 5838 } 5839 5840 // check if connection was just disconnected 5841 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5842 log_info("gap_connect: send create connection (again)"); 5843 conn->state = SEND_CREATE_CONNECTION; 5844 hci_run(); 5845 return ERROR_CODE_SUCCESS; 5846 } 5847 5848 log_info("gap_connect: context exists with state %u", conn->state); 5849 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5850 hci_run(); 5851 return ERROR_CODE_SUCCESS; 5852 } 5853 5854 // @assumption: only a single outgoing LE Connection exists 5855 static hci_connection_t * gap_get_outgoing_connection(void){ 5856 btstack_linked_item_t *it; 5857 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5858 hci_connection_t * conn = (hci_connection_t *) it; 5859 if (!hci_is_le_connection(conn)) continue; 5860 switch (conn->state){ 5861 case SEND_CREATE_CONNECTION: 5862 case SENT_CREATE_CONNECTION: 5863 case SENT_CANCEL_CONNECTION: 5864 return conn; 5865 default: 5866 break; 5867 }; 5868 } 5869 return NULL; 5870 } 5871 5872 uint8_t gap_connect_cancel(void){ 5873 hci_connection_t * conn = gap_get_outgoing_connection(); 5874 if (!conn) return 0; 5875 switch (conn->state){ 5876 case SEND_CREATE_CONNECTION: 5877 // skip sending create connection and emit event instead 5878 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5879 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5880 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5881 btstack_memory_hci_connection_free( conn ); 5882 break; 5883 case SENT_CREATE_CONNECTION: 5884 // request to send cancel connection 5885 conn->state = SEND_CANCEL_CONNECTION; 5886 hci_run(); 5887 break; 5888 default: 5889 break; 5890 } 5891 return 0; 5892 } 5893 #endif 5894 5895 #ifdef ENABLE_LE_CENTRAL 5896 /** 5897 * @brief Set connection parameters for outgoing connections 5898 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5899 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5900 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5901 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5902 * @param conn_latency, default: 4 5903 * @param supervision_timeout (unit: 10ms), default: 720 ms 5904 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5905 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5906 */ 5907 5908 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5909 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5910 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5911 hci_stack->le_connection_scan_interval = conn_scan_interval; 5912 hci_stack->le_connection_scan_window = conn_scan_window; 5913 hci_stack->le_connection_interval_min = conn_interval_min; 5914 hci_stack->le_connection_interval_max = conn_interval_max; 5915 hci_stack->le_connection_latency = conn_latency; 5916 hci_stack->le_supervision_timeout = supervision_timeout; 5917 hci_stack->le_minimum_ce_length = min_ce_length; 5918 hci_stack->le_maximum_ce_length = max_ce_length; 5919 } 5920 #endif 5921 5922 /** 5923 * @brief Updates the connection parameters for a given LE connection 5924 * @param handle 5925 * @param conn_interval_min (unit: 1.25ms) 5926 * @param conn_interval_max (unit: 1.25ms) 5927 * @param conn_latency 5928 * @param supervision_timeout (unit: 10ms) 5929 * @returns 0 if ok 5930 */ 5931 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5932 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5933 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5934 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5935 connection->le_conn_interval_min = conn_interval_min; 5936 connection->le_conn_interval_max = conn_interval_max; 5937 connection->le_conn_latency = conn_latency; 5938 connection->le_supervision_timeout = supervision_timeout; 5939 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5940 hci_run(); 5941 return 0; 5942 } 5943 5944 /** 5945 * @brief Request an update of the connection parameter for a given LE connection 5946 * @param handle 5947 * @param conn_interval_min (unit: 1.25ms) 5948 * @param conn_interval_max (unit: 1.25ms) 5949 * @param conn_latency 5950 * @param supervision_timeout (unit: 10ms) 5951 * @returns 0 if ok 5952 */ 5953 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5954 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5955 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5956 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5957 connection->le_conn_interval_min = conn_interval_min; 5958 connection->le_conn_interval_max = conn_interval_max; 5959 connection->le_conn_latency = conn_latency; 5960 connection->le_supervision_timeout = supervision_timeout; 5961 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5962 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5963 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5964 return 0; 5965 } 5966 5967 #ifdef ENABLE_LE_PERIPHERAL 5968 5969 /** 5970 * @brief Set Advertisement Data 5971 * @param advertising_data_length 5972 * @param advertising_data (max 31 octets) 5973 * @note data is not copied, pointer has to stay valid 5974 */ 5975 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5976 hci_stack->le_advertisements_data_len = advertising_data_length; 5977 hci_stack->le_advertisements_data = advertising_data; 5978 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5979 hci_run(); 5980 } 5981 5982 /** 5983 * @brief Set Scan Response Data 5984 * @param advertising_data_length 5985 * @param advertising_data (max 31 octets) 5986 * @note data is not copied, pointer has to stay valid 5987 */ 5988 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5989 hci_stack->le_scan_response_data_len = scan_response_data_length; 5990 hci_stack->le_scan_response_data = scan_response_data; 5991 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5992 hci_run(); 5993 } 5994 5995 /** 5996 * @brief Set Advertisement Parameters 5997 * @param adv_int_min 5998 * @param adv_int_max 5999 * @param adv_type 6000 * @param direct_address_type 6001 * @param direct_address 6002 * @param channel_map 6003 * @param filter_policy 6004 * 6005 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6006 */ 6007 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6008 uint8_t direct_address_typ, bd_addr_t direct_address, 6009 uint8_t channel_map, uint8_t filter_policy) { 6010 6011 hci_stack->le_advertisements_interval_min = adv_int_min; 6012 hci_stack->le_advertisements_interval_max = adv_int_max; 6013 hci_stack->le_advertisements_type = adv_type; 6014 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6015 hci_stack->le_advertisements_channel_map = channel_map; 6016 hci_stack->le_advertisements_filter_policy = filter_policy; 6017 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6018 6); 6019 6020 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6021 hci_run(); 6022 } 6023 6024 /** 6025 * @brief Enable/Disable Advertisements 6026 * @param enabled 6027 */ 6028 void gap_advertisements_enable(int enabled){ 6029 hci_stack->le_advertisements_enabled = enabled != 0; 6030 hci_update_advertisements_enabled_for_current_roles(); 6031 hci_run(); 6032 } 6033 6034 #endif 6035 6036 void hci_le_set_own_address_type(uint8_t own_address_type){ 6037 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6038 if (own_address_type == hci_stack->le_own_addr_type) return; 6039 hci_stack->le_own_addr_type = own_address_type; 6040 6041 #ifdef ENABLE_LE_PERIPHERAL 6042 // update advertisement parameters, too 6043 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6044 hci_run(); 6045 #endif 6046 #ifdef ENABLE_LE_CENTRAL 6047 // note: we don't update scan parameters or modify ongoing connection attempts 6048 #endif 6049 } 6050 6051 #endif 6052 6053 uint8_t gap_disconnect(hci_con_handle_t handle){ 6054 hci_connection_t * conn = hci_connection_for_handle(handle); 6055 if (!conn){ 6056 hci_emit_disconnection_complete(handle, 0); 6057 return 0; 6058 } 6059 // ignore if already disconnected 6060 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6061 return 0; 6062 } 6063 conn->state = SEND_DISCONNECT; 6064 hci_run(); 6065 return 0; 6066 } 6067 6068 int gap_read_rssi(hci_con_handle_t con_handle){ 6069 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6070 if (hci_connection == NULL) return 0; 6071 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6072 hci_run(); 6073 return 1; 6074 } 6075 6076 /** 6077 * @brief Get connection type 6078 * @param con_handle 6079 * @result connection_type 6080 */ 6081 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6082 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6083 if (!conn) return GAP_CONNECTION_INVALID; 6084 switch (conn->address_type){ 6085 case BD_ADDR_TYPE_LE_PUBLIC: 6086 case BD_ADDR_TYPE_LE_RANDOM: 6087 return GAP_CONNECTION_LE; 6088 case BD_ADDR_TYPE_SCO: 6089 return GAP_CONNECTION_SCO; 6090 case BD_ADDR_TYPE_ACL: 6091 return GAP_CONNECTION_ACL; 6092 default: 6093 return GAP_CONNECTION_INVALID; 6094 } 6095 } 6096 6097 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6098 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6099 if (!conn) return HCI_ROLE_INVALID; 6100 return (hci_role_t) conn->role; 6101 } 6102 6103 6104 #ifdef ENABLE_CLASSIC 6105 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6106 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6107 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6108 conn->request_role = role; 6109 hci_run(); 6110 return ERROR_CODE_SUCCESS; 6111 } 6112 #endif 6113 6114 #ifdef ENABLE_BLE 6115 6116 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){ 6117 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6118 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6119 6120 conn->le_phy_update_all_phys = all_phys; 6121 conn->le_phy_update_tx_phys = tx_phys; 6122 conn->le_phy_update_rx_phys = rx_phys; 6123 conn->le_phy_update_phy_options = phy_options; 6124 6125 hci_run(); 6126 6127 return 0; 6128 } 6129 6130 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6131 // check if already in list 6132 btstack_linked_list_iterator_t it; 6133 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6134 while (btstack_linked_list_iterator_has_next(&it)) { 6135 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6136 if (entry->address_type != address_type) { 6137 continue; 6138 } 6139 if (memcmp(entry->address, address, 6) != 0) { 6140 continue; 6141 } 6142 // disallow if already scheduled to add 6143 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6144 return ERROR_CODE_COMMAND_DISALLOWED; 6145 } 6146 // still on controller, but scheduled to remove -> re-add 6147 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6148 return ERROR_CODE_SUCCESS; 6149 } 6150 // alloc and add to list 6151 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6152 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6153 entry->address_type = address_type; 6154 (void)memcpy(entry->address, address, 6); 6155 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6156 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6157 return ERROR_CODE_SUCCESS; 6158 } 6159 6160 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6161 btstack_linked_list_iterator_t it; 6162 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6163 while (btstack_linked_list_iterator_has_next(&it)){ 6164 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6165 if (entry->address_type != address_type) { 6166 continue; 6167 } 6168 if (memcmp(entry->address, address, 6) != 0) { 6169 continue; 6170 } 6171 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6172 // remove from controller if already present 6173 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6174 } else { 6175 // directly remove entry from whitelist 6176 btstack_linked_list_iterator_remove(&it); 6177 btstack_memory_whitelist_entry_free(entry); 6178 } 6179 return ERROR_CODE_SUCCESS; 6180 } 6181 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6182 } 6183 6184 static void hci_whitelist_clear(void){ 6185 btstack_linked_list_iterator_t it; 6186 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6187 while (btstack_linked_list_iterator_has_next(&it)){ 6188 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6189 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6190 // remove from controller if already present 6191 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6192 continue; 6193 } 6194 // directly remove entry from whitelist 6195 btstack_linked_list_iterator_remove(&it); 6196 btstack_memory_whitelist_entry_free(entry); 6197 } 6198 } 6199 6200 /** 6201 * @brief Clear Whitelist 6202 * @returns 0 if ok 6203 */ 6204 uint8_t gap_whitelist_clear(void){ 6205 hci_whitelist_clear(); 6206 hci_run(); 6207 return ERROR_CODE_SUCCESS; 6208 } 6209 6210 /** 6211 * @brief Add Device to Whitelist 6212 * @param address_typ 6213 * @param address 6214 * @returns 0 if ok 6215 */ 6216 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6217 uint8_t status = hci_whitelist_add(address_type, address); 6218 if (status){ 6219 return status; 6220 } 6221 hci_run(); 6222 return ERROR_CODE_SUCCESS; 6223 } 6224 6225 /** 6226 * @brief Remove Device from Whitelist 6227 * @param address_typ 6228 * @param address 6229 * @returns 0 if ok 6230 */ 6231 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6232 uint8_t status = hci_whitelist_remove(address_type, address); 6233 if (status){ 6234 return status; 6235 } 6236 hci_run(); 6237 return ERROR_CODE_SUCCESS; 6238 } 6239 6240 #ifdef ENABLE_LE_CENTRAL 6241 /** 6242 * @brief Connect with Whitelist 6243 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6244 * @returns - if ok 6245 */ 6246 uint8_t gap_connect_with_whitelist(void){ 6247 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6248 return ERROR_CODE_COMMAND_DISALLOWED; 6249 } 6250 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6251 hci_run(); 6252 return ERROR_CODE_SUCCESS; 6253 } 6254 6255 /** 6256 * @brief Auto Connection Establishment - Start Connecting to device 6257 * @param address_typ 6258 * @param address 6259 * @returns 0 if ok 6260 */ 6261 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6262 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6263 return ERROR_CODE_COMMAND_DISALLOWED; 6264 } 6265 6266 uint8_t status = hci_whitelist_add(address_type, address); 6267 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6268 return status; 6269 } 6270 6271 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6272 6273 hci_run(); 6274 return ERROR_CODE_SUCCESS; 6275 } 6276 6277 /** 6278 * @brief Auto Connection Establishment - Stop Connecting to device 6279 * @param address_typ 6280 * @param address 6281 * @returns 0 if ok 6282 */ 6283 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6284 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6285 return ERROR_CODE_COMMAND_DISALLOWED; 6286 } 6287 6288 hci_whitelist_remove(address_type, address); 6289 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6290 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6291 } 6292 hci_run(); 6293 return 0; 6294 } 6295 6296 /** 6297 * @brief Auto Connection Establishment - Stop everything 6298 * @note Convenience function to stop all active auto connection attempts 6299 */ 6300 uint8_t gap_auto_connection_stop_all(void){ 6301 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6302 return ERROR_CODE_COMMAND_DISALLOWED; 6303 } 6304 hci_whitelist_clear(); 6305 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6306 hci_run(); 6307 return ERROR_CODE_SUCCESS; 6308 } 6309 6310 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6311 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6312 if (!conn) return 0; 6313 return conn->le_connection_interval; 6314 } 6315 #endif 6316 #endif 6317 6318 #ifdef ENABLE_CLASSIC 6319 /** 6320 * @brief Set Extended Inquiry Response data 6321 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6322 * @note has to be done before stack starts up 6323 */ 6324 void gap_set_extended_inquiry_response(const uint8_t * data){ 6325 hci_stack->eir_data = data; 6326 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6327 hci_run(); 6328 } 6329 6330 /** 6331 * @brief Start GAP Classic Inquiry 6332 * @param duration in 1.28s units 6333 * @return 0 if ok 6334 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6335 */ 6336 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6337 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6338 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6339 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6340 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6341 } 6342 hci_stack->inquiry_state = duration_in_1280ms_units; 6343 hci_run(); 6344 return 0; 6345 } 6346 6347 /** 6348 * @brief Stop GAP Classic Inquiry 6349 * @returns 0 if ok 6350 */ 6351 int gap_inquiry_stop(void){ 6352 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6353 // emit inquiry complete event, before it even started 6354 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6355 hci_emit_event(event, sizeof(event), 1); 6356 return 0; 6357 } 6358 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6359 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6360 hci_run(); 6361 return 0; 6362 } 6363 6364 void gap_inquiry_set_lap(uint32_t lap){ 6365 hci_stack->inquiry_lap = lap; 6366 } 6367 6368 6369 /** 6370 * @brief Remote Name Request 6371 * @param addr 6372 * @param page_scan_repetition_mode 6373 * @param clock_offset only used when bit 15 is set 6374 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6375 */ 6376 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6377 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6378 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6379 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6380 hci_stack->remote_name_clock_offset = clock_offset; 6381 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6382 hci_run(); 6383 return 0; 6384 } 6385 6386 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6387 hci_stack->gap_pairing_state = state; 6388 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6389 hci_run(); 6390 return 0; 6391 } 6392 6393 /** 6394 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6395 * @param addr 6396 * @param pin_data 6397 * @param pin_len 6398 * @return 0 if ok 6399 */ 6400 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6401 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6402 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6403 hci_stack->gap_pairing_pin_len = pin_len; 6404 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6405 } 6406 6407 /** 6408 * @brief Legacy Pairing Pin Code Response 6409 * @param addr 6410 * @param pin 6411 * @return 0 if ok 6412 */ 6413 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6414 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6415 } 6416 6417 /** 6418 * @brief Abort Legacy Pairing 6419 * @param addr 6420 * @param pin 6421 * @return 0 if ok 6422 */ 6423 int gap_pin_code_negative(bd_addr_t addr){ 6424 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6425 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6426 } 6427 6428 /** 6429 * @brief SSP Passkey Response 6430 * @param addr 6431 * @param passkey 6432 * @return 0 if ok 6433 */ 6434 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6435 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6436 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6437 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6438 } 6439 6440 /** 6441 * @brief Abort SSP Passkey Entry/Pairing 6442 * @param addr 6443 * @param pin 6444 * @return 0 if ok 6445 */ 6446 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6447 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6448 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6449 } 6450 6451 /** 6452 * @brief Accept SSP Numeric Comparison 6453 * @param addr 6454 * @param passkey 6455 * @return 0 if ok 6456 */ 6457 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6458 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6459 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6460 } 6461 6462 /** 6463 * @brief Abort SSP Numeric Comparison/Pairing 6464 * @param addr 6465 * @param pin 6466 * @return 0 if ok 6467 */ 6468 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6469 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6470 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6471 } 6472 6473 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6474 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6475 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6476 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6477 connectionSetAuthenticationFlags(conn, flag); 6478 hci_run(); 6479 return ERROR_CODE_SUCCESS; 6480 } 6481 #endif 6482 6483 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6484 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6485 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6486 } 6487 6488 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6489 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6490 } 6491 #endif 6492 6493 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6494 /** 6495 * @brief Report Remote OOB Data 6496 * @param bd_addr 6497 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6498 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6499 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6500 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6501 */ 6502 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){ 6503 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6504 if (connection == NULL) { 6505 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6506 } 6507 connection->classic_oob_c_192 = c_192; 6508 connection->classic_oob_r_192 = r_192; 6509 6510 // ignore P-256 if not supported by us 6511 if (hci_stack->secure_connections_active){ 6512 connection->classic_oob_c_256 = c_256; 6513 connection->classic_oob_r_256 = r_256; 6514 } 6515 6516 return ERROR_CODE_SUCCESS; 6517 } 6518 /** 6519 * @brief Generate new OOB data 6520 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6521 */ 6522 void gap_ssp_generate_oob_data(void){ 6523 hci_stack->classic_read_local_oob_data = true; 6524 hci_run(); 6525 } 6526 6527 #endif 6528 6529 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6530 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6531 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6532 if (connection == NULL) { 6533 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6534 } 6535 6536 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6537 connection->link_key_type = type; 6538 6539 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6540 } 6541 6542 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6543 /** 6544 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6545 * @param inquiry_mode see bluetooth_defines.h 6546 */ 6547 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6548 hci_stack->inquiry_mode = inquiry_mode; 6549 } 6550 6551 /** 6552 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6553 */ 6554 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6555 hci_stack->sco_voice_setting = voice_setting; 6556 } 6557 6558 /** 6559 * @brief Get SCO Voice Setting 6560 * @return current voice setting 6561 */ 6562 uint16_t hci_get_sco_voice_setting(void){ 6563 return hci_stack->sco_voice_setting; 6564 } 6565 6566 static int hci_have_usb_transport(void){ 6567 if (!hci_stack->hci_transport) return 0; 6568 const char * transport_name = hci_stack->hci_transport->name; 6569 if (!transport_name) return 0; 6570 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6571 } 6572 6573 /** @brief Get SCO packet length for current SCO Voice setting 6574 * @note Using SCO packets of the exact length is required for USB transfer 6575 * @return Length of SCO packets in bytes (not audio frames) 6576 */ 6577 uint16_t hci_get_sco_packet_length(void){ 6578 uint16_t sco_packet_length = 0; 6579 6580 #ifdef ENABLE_SCO_OVER_HCI 6581 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6582 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6583 6584 if (hci_have_usb_transport()){ 6585 // see Core Spec for H2 USB Transfer. 6586 // 3 byte SCO header + 24 bytes per connection 6587 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6588 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6589 } else { 6590 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6591 sco_packet_length = 3 + 60 * multiplier; 6592 // assert that it still fits inside an SCO buffer 6593 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6594 sco_packet_length = 3 + 60; 6595 } 6596 } 6597 #endif 6598 6599 #ifdef HAVE_SCO_TRANSPORT 6600 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6601 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6602 sco_packet_length = 3 + 60 * multiplier; 6603 #endif 6604 return sco_packet_length; 6605 } 6606 6607 /** 6608 * @brief Sets the master/slave policy 6609 * @param policy (0: attempt to become master, 1: let connecting device decide) 6610 */ 6611 void hci_set_master_slave_policy(uint8_t policy){ 6612 hci_stack->master_slave_policy = policy; 6613 } 6614 6615 #endif 6616 6617 HCI_STATE hci_get_state(void){ 6618 return hci_stack->state; 6619 } 6620 6621 #ifdef ENABLE_CLASSIC 6622 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6623 hci_stack->gap_classic_accept_callback = accept_callback; 6624 } 6625 #endif 6626 6627 /** 6628 * @brief Set callback for Bluetooth Hardware Error 6629 */ 6630 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6631 hci_stack->hardware_error_callback = fn; 6632 } 6633 6634 void hci_disconnect_all(void){ 6635 btstack_linked_list_iterator_t it; 6636 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6637 while (btstack_linked_list_iterator_has_next(&it)){ 6638 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6639 if (con->state == SENT_DISCONNECT) continue; 6640 con->state = SEND_DISCONNECT; 6641 } 6642 hci_run(); 6643 } 6644 6645 uint16_t hci_get_manufacturer(void){ 6646 return hci_stack->manufacturer; 6647 } 6648 6649 #ifdef ENABLE_BLE 6650 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6651 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6652 if (!hci_con) return NULL; 6653 return &hci_con->sm_connection; 6654 } 6655 6656 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6657 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6658 #endif 6659 6660 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6661 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6662 if (hci_connection == NULL) return 0; 6663 if (hci_is_le_connection(hci_connection)){ 6664 #ifdef ENABLE_BLE 6665 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6666 if (sm_conn->sm_connection_encrypted) { 6667 return sm_conn->sm_actual_encryption_key_size; 6668 } 6669 #endif 6670 } else { 6671 #ifdef ENABLE_CLASSIC 6672 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6673 return hci_connection->encryption_key_size; 6674 } 6675 #endif 6676 } 6677 return 0; 6678 } 6679 6680 int gap_authenticated(hci_con_handle_t con_handle){ 6681 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6682 if (hci_connection == NULL) return 0; 6683 6684 switch (hci_connection->address_type){ 6685 #ifdef ENABLE_BLE 6686 case BD_ADDR_TYPE_LE_PUBLIC: 6687 case BD_ADDR_TYPE_LE_RANDOM: 6688 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6689 return hci_connection->sm_connection.sm_connection_authenticated; 6690 #endif 6691 #ifdef ENABLE_CLASSIC 6692 case BD_ADDR_TYPE_SCO: 6693 case BD_ADDR_TYPE_ACL: 6694 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6695 #endif 6696 default: 6697 return 0; 6698 } 6699 } 6700 6701 int gap_secure_connection(hci_con_handle_t con_handle){ 6702 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6703 if (hci_connection == NULL) return 0; 6704 6705 switch (hci_connection->address_type){ 6706 #ifdef ENABLE_BLE 6707 case BD_ADDR_TYPE_LE_PUBLIC: 6708 case BD_ADDR_TYPE_LE_RANDOM: 6709 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6710 return hci_connection->sm_connection.sm_connection_sc; 6711 #endif 6712 #ifdef ENABLE_CLASSIC 6713 case BD_ADDR_TYPE_SCO: 6714 case BD_ADDR_TYPE_ACL: 6715 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6716 #endif 6717 default: 6718 return 0; 6719 } 6720 } 6721 6722 bool gap_bonded(hci_con_handle_t con_handle){ 6723 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6724 if (hci_connection == NULL) return 0; 6725 6726 #ifdef ENABLE_CLASSIC 6727 link_key_t link_key; 6728 link_key_type_t link_key_type; 6729 #endif 6730 switch (hci_connection->address_type){ 6731 #ifdef ENABLE_BLE 6732 case BD_ADDR_TYPE_LE_PUBLIC: 6733 case BD_ADDR_TYPE_LE_RANDOM: 6734 return hci_connection->sm_connection.sm_le_db_index >= 0; 6735 #endif 6736 #ifdef ENABLE_CLASSIC 6737 case BD_ADDR_TYPE_SCO: 6738 case BD_ADDR_TYPE_ACL: 6739 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6740 #endif 6741 default: 6742 return false; 6743 } 6744 } 6745 6746 #ifdef ENABLE_BLE 6747 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6748 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6749 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6750 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6751 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6752 return sm_conn->sm_connection_authorization_state; 6753 } 6754 #endif 6755 6756 #ifdef ENABLE_CLASSIC 6757 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){ 6758 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6759 if (!conn) return GAP_CONNECTION_INVALID; 6760 conn->sniff_min_interval = sniff_min_interval; 6761 conn->sniff_max_interval = sniff_max_interval; 6762 conn->sniff_attempt = sniff_attempt; 6763 conn->sniff_timeout = sniff_timeout; 6764 hci_run(); 6765 return 0; 6766 } 6767 6768 /** 6769 * @brief Exit Sniff mode 6770 * @param con_handle 6771 @ @return 0 if ok 6772 */ 6773 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6774 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6775 if (!conn) return GAP_CONNECTION_INVALID; 6776 conn->sniff_min_interval = 0xffff; 6777 hci_run(); 6778 return 0; 6779 } 6780 6781 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){ 6782 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6783 if (!conn) return GAP_CONNECTION_INVALID; 6784 conn->sniff_subrating_max_latency = max_latency; 6785 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6786 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6787 hci_run(); 6788 return ERROR_CODE_SUCCESS; 6789 } 6790 6791 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){ 6792 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6793 if (!conn) return GAP_CONNECTION_INVALID; 6794 conn->qos_service_type = service_type; 6795 conn->qos_token_rate = token_rate; 6796 conn->qos_peak_bandwidth = peak_bandwidth; 6797 conn->qos_latency = latency; 6798 conn->qos_delay_variation = delay_variation; 6799 hci_run(); 6800 return ERROR_CODE_SUCCESS; 6801 } 6802 6803 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6804 hci_stack->new_page_scan_interval = page_scan_interval; 6805 hci_stack->new_page_scan_window = page_scan_window; 6806 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6807 hci_run(); 6808 } 6809 6810 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6811 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6812 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6813 hci_run(); 6814 } 6815 6816 #endif 6817 6818 void hci_halting_defer(void){ 6819 if (hci_stack->state != HCI_STATE_HALTING) return; 6820 switch (hci_stack->substate){ 6821 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6822 case HCI_HALTING_CLOSE: 6823 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6824 break; 6825 default: 6826 break; 6827 } 6828 } 6829 6830 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6831 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6832 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6833 if (le_device_db_index >= le_device_db_max_count()) return; 6834 uint8_t offset = le_device_db_index >> 3; 6835 uint8_t mask = 1 << (le_device_db_index & 7); 6836 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6837 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6838 // note: go back to remove entries, otherwise, a remove + add will skip the add 6839 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6840 } 6841 } 6842 6843 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6844 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6845 if (le_device_db_index >= le_device_db_max_count()) return; 6846 uint8_t offset = le_device_db_index >> 3; 6847 uint8_t mask = 1 << (le_device_db_index & 7); 6848 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6849 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6850 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6851 } 6852 } 6853 6854 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6855 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6856 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6857 } 6858 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6859 // restart le resolving list update 6860 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6861 } 6862 return ERROR_CODE_SUCCESS; 6863 } 6864 #endif 6865 6866 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6867 void hci_setup_test_connections_fuzz(void){ 6868 hci_connection_t * conn; 6869 6870 // default address: 66:55:44:33:00:01 6871 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6872 6873 // setup Controller info 6874 hci_stack->num_cmd_packets = 255; 6875 hci_stack->acl_packets_total_num = 255; 6876 6877 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6878 addr[5] = 0x01; 6879 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6880 conn->con_handle = addr[5]; 6881 conn->role = HCI_ROLE_SLAVE; 6882 conn->state = RECEIVED_CONNECTION_REQUEST; 6883 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6884 6885 // setup incoming Classic SCO connection with con handle 0x0002 6886 addr[5] = 0x02; 6887 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6888 conn->con_handle = addr[5]; 6889 conn->role = HCI_ROLE_SLAVE; 6890 conn->state = RECEIVED_CONNECTION_REQUEST; 6891 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6892 6893 // setup ready Classic ACL connection with con handle 0x0003 6894 addr[5] = 0x03; 6895 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6896 conn->con_handle = addr[5]; 6897 conn->role = HCI_ROLE_SLAVE; 6898 conn->state = OPEN; 6899 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6900 6901 // setup ready Classic SCO connection with con handle 0x0004 6902 addr[5] = 0x04; 6903 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6904 conn->con_handle = addr[5]; 6905 conn->role = HCI_ROLE_SLAVE; 6906 conn->state = OPEN; 6907 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6908 6909 // setup ready LE ACL connection with con handle 0x005 and public address 6910 addr[5] = 0x05; 6911 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6912 conn->con_handle = addr[5]; 6913 conn->role = HCI_ROLE_SLAVE; 6914 conn->state = OPEN; 6915 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6916 conn->sm_connection.sm_connection_encrypted = 1; 6917 } 6918 6919 void hci_free_connections_fuzz(void){ 6920 btstack_linked_list_iterator_t it; 6921 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6922 while (btstack_linked_list_iterator_has_next(&it)){ 6923 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6924 btstack_linked_list_iterator_remove(&it); 6925 btstack_memory_hci_connection_free(con); 6926 } 6927 } 6928 void hci_simulate_working_fuzz(void){ 6929 hci_init_done(); 6930 hci_stack->num_cmd_packets = 255; 6931 } 6932 #endif 6933