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 BLUEKITCHEN 24 * GMBH 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_halting_timeout_handler(btstack_timer_source_t * ds); 156 static void hci_emit_transport_packet_sent(void); 157 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 158 static void hci_emit_nr_connections_changed(void); 159 static void hci_emit_hci_open_failed(void); 160 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 161 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 162 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 163 static void hci_run(void); 164 static int hci_is_le_connection(hci_connection_t * connection); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 169 #endif 170 171 #ifdef ENABLE_BLE 172 #ifdef ENABLE_LE_CENTRAL 173 // called from test/ble_client/advertising_data_parser.c 174 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 175 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 176 static void hci_whitelist_free(void); 177 static hci_connection_t * gap_get_outgoing_connection(void); 178 #endif 179 #endif 180 181 // the STACK is here 182 #ifndef HAVE_MALLOC 183 static hci_stack_t hci_stack_static; 184 #endif 185 static hci_stack_t * hci_stack = NULL; 186 187 #ifdef ENABLE_CLASSIC 188 // default name 189 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 190 191 // test helper 192 static uint8_t disable_l2cap_timeouts = 0; 193 #endif 194 195 // reset connection state on create and on reconnect 196 // don't overwrite addr, con handle, role 197 static void hci_connection_init(hci_connection_t * conn){ 198 conn->authentication_flags = AUTH_FLAG_NONE; 199 conn->bonding_flags = 0; 200 conn->requested_security_level = LEVEL_0; 201 #ifdef ENABLE_CLASSIC 202 conn->request_role = HCI_ROLE_INVALID; 203 conn->sniff_subrating_max_latency = 0xffff; 204 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 205 conn->link_key_type = INVALID_LINK_KEY; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 #ifdef ENABLE_CLASSIC_PAIRING_OOB 222 conn->classic_oob_c_192 = NULL; 223 conn->classic_oob_r_192 = NULL; 224 conn->classic_oob_c_256 = NULL; 225 conn->classic_oob_r_256 = NULL; 226 #endif 227 } 228 229 /** 230 * create connection for given address 231 * 232 * @return connection OR NULL, if no memory left 233 */ 234 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 235 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 236 237 hci_connection_t * conn = btstack_memory_hci_connection_get(); 238 if (!conn) return NULL; 239 hci_connection_init(conn); 240 241 bd_addr_copy(conn->address, addr); 242 conn->address_type = addr_type; 243 conn->con_handle = HCI_CON_HANDLE_INVALID; 244 conn->role = HCI_ROLE_INVALID; 245 246 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 247 248 return conn; 249 } 250 251 252 /** 253 * get le connection parameter range 254 * 255 * @return le connection parameter range struct 256 */ 257 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 258 *range = hci_stack->le_connection_parameter_range; 259 } 260 261 /** 262 * set le connection parameter range 263 * 264 */ 265 266 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 267 hci_stack->le_connection_parameter_range = *range; 268 } 269 270 /** 271 * @brief Test if connection parameters are inside in existing rage 272 * @param conn_interval_min (unit: 1.25ms) 273 * @param conn_interval_max (unit: 1.25ms) 274 * @param conn_latency 275 * @param supervision_timeout (unit: 10ms) 276 * @return 1 if included 277 */ 278 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){ 279 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 280 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 281 282 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 283 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 284 285 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 286 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 287 288 return 1; 289 } 290 291 /** 292 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 293 * @note: default: 1 294 * @param max_peripheral_connections 295 */ 296 #ifdef ENABLE_LE_PERIPHERAL 297 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 298 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 299 } 300 #endif 301 302 /** 303 * get hci connections iterator 304 * 305 * @return hci connections iterator 306 */ 307 308 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 309 btstack_linked_list_iterator_init(it, &hci_stack->connections); 310 } 311 312 /** 313 * get connection for a given handle 314 * 315 * @return connection OR NULL, if not found 316 */ 317 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 318 btstack_linked_list_iterator_t it; 319 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 320 while (btstack_linked_list_iterator_has_next(&it)){ 321 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 322 if ( item->con_handle == con_handle ) { 323 return item; 324 } 325 } 326 return NULL; 327 } 328 329 /** 330 * get connection for given address 331 * 332 * @return connection OR NULL, if not found 333 */ 334 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 335 btstack_linked_list_iterator_t it; 336 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 337 while (btstack_linked_list_iterator_has_next(&it)){ 338 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 339 if (connection->address_type != addr_type) continue; 340 if (memcmp(addr, connection->address, 6) != 0) continue; 341 return connection; 342 } 343 return NULL; 344 } 345 346 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 347 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 348 } 349 350 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 351 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 352 } 353 354 #ifdef ENABLE_CLASSIC 355 356 #ifdef ENABLE_SCO_OVER_HCI 357 static int hci_number_sco_connections(void){ 358 int connections = 0; 359 btstack_linked_list_iterator_t it; 360 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 361 while (btstack_linked_list_iterator_has_next(&it)){ 362 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 363 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 364 connections++; 365 } 366 return connections; 367 } 368 #endif 369 370 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 371 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 372 #ifdef HAVE_EMBEDDED_TICK 373 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 374 // connections might be timed out 375 hci_emit_l2cap_check_timeout(connection); 376 } 377 #else 378 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 379 // connections might be timed out 380 hci_emit_l2cap_check_timeout(connection); 381 } 382 #endif 383 } 384 385 static void hci_connection_timestamp(hci_connection_t *connection){ 386 #ifdef HAVE_EMBEDDED_TICK 387 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 388 #else 389 connection->timestamp = btstack_run_loop_get_time_ms(); 390 #endif 391 } 392 393 /** 394 * add authentication flags and reset timer 395 * @note: assumes classic connection 396 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 397 */ 398 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 399 bd_addr_t addr; 400 reverse_bd_addr(bd_addr, addr); 401 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 402 if (conn) { 403 connectionSetAuthenticationFlags(conn, flags); 404 hci_connection_timestamp(conn); 405 } 406 } 407 408 static bool hci_pairing_active(hci_connection_t * hci_connection){ 409 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 410 } 411 412 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 413 if (hci_pairing_active(hci_connection)) return; 414 if (ssp){ 415 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 416 } else { 417 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 418 } 419 // if we are initiator, we have sent an HCI Authenticate Request 420 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 421 422 // if we are responder, use minimal service security level as required level 423 if (!initiator){ 424 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); 425 } 426 427 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 428 429 uint8_t event[12]; 430 event[0] = GAP_EVENT_PAIRING_STARTED; 431 event[1] = 10; 432 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 433 reverse_bd_addr(hci_connection->address, &event[4]); 434 event[10] = (uint8_t) ssp; 435 event[11] = (uint8_t) initiator; 436 hci_emit_event(event, sizeof(event), 1); 437 } 438 439 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 440 hci_connection->requested_security_level = LEVEL_0; 441 if (!hci_pairing_active(hci_connection)) return; 442 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 443 #ifdef ENABLE_CLASSIC_PAIRING_OOB 444 hci_connection->classic_oob_c_192 = NULL; 445 hci_connection->classic_oob_r_192 = NULL; 446 hci_connection->classic_oob_c_256 = NULL; 447 hci_connection->classic_oob_r_256 = NULL; 448 #endif 449 log_info("pairing complete, status %02x", status); 450 451 uint8_t event[11]; 452 event[0] = GAP_EVENT_PAIRING_COMPLETE; 453 event[1] = 9; 454 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 455 reverse_bd_addr(hci_connection->address, &event[4]); 456 event[10] = status; 457 hci_emit_event(event, sizeof(event), 1); 458 } 459 460 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 461 hci_connection_t * conn = hci_connection_for_handle(handle); 462 if (!conn) return false; 463 return hci_pairing_active(conn); 464 } 465 466 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 467 if (!hci_stack->link_key_db) return; 468 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 469 hci_stack->link_key_db->delete_link_key(addr); 470 } 471 472 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 473 if (!hci_stack->link_key_db) return; 474 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 475 hci_stack->link_key_db->put_link_key(addr, link_key, type); 476 } 477 478 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 479 if (!hci_stack->link_key_db) return false; 480 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 481 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 482 return result; 483 } 484 485 void gap_delete_all_link_keys(void){ 486 bd_addr_t addr; 487 link_key_t link_key; 488 link_key_type_t type; 489 btstack_link_key_iterator_t it; 490 int ok = gap_link_key_iterator_init(&it); 491 if (!ok) { 492 log_error("could not initialize iterator"); 493 return; 494 } 495 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 496 gap_drop_link_key_for_bd_addr(addr); 497 } 498 gap_link_key_iterator_done(&it); 499 } 500 501 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 502 if (!hci_stack->link_key_db) return 0; 503 if (!hci_stack->link_key_db->iterator_init) return 0; 504 return hci_stack->link_key_db->iterator_init(it); 505 } 506 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){ 507 if (!hci_stack->link_key_db) return 0; 508 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 509 } 510 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 511 if (!hci_stack->link_key_db) return; 512 hci_stack->link_key_db->iterator_done(it); 513 } 514 #endif 515 516 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 517 switch (address_type){ 518 case BD_ADDR_TYPE_LE_PUBLIC: 519 case BD_ADDR_TYPE_LE_RANDOM: 520 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 521 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 522 return true; 523 default: 524 return false; 525 } 526 } 527 528 static int hci_is_le_connection(hci_connection_t * connection){ 529 return hci_is_le_connection_type(connection->address_type); 530 } 531 532 /** 533 * count connections 534 */ 535 static int nr_hci_connections(void){ 536 int count = 0; 537 btstack_linked_item_t *it; 538 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 539 count++; 540 } 541 return count; 542 } 543 544 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 545 546 unsigned int num_packets_sent_classic = 0; 547 unsigned int num_packets_sent_le = 0; 548 549 btstack_linked_item_t *it; 550 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 551 hci_connection_t * connection = (hci_connection_t *) it; 552 if (hci_is_le_connection(connection)){ 553 num_packets_sent_le += connection->num_packets_sent; 554 } 555 if (connection->address_type == BD_ADDR_TYPE_ACL){ 556 num_packets_sent_classic += connection->num_packets_sent; 557 } 558 } 559 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 560 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 561 int free_slots_le = 0; 562 563 if (free_slots_classic < 0){ 564 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); 565 return 0; 566 } 567 568 if (hci_stack->le_acl_packets_total_num){ 569 // if we have LE slots, they are used 570 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 571 if (free_slots_le < 0){ 572 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); 573 return 0; 574 } 575 } else { 576 // otherwise, classic slots are used for LE, too 577 free_slots_classic -= num_packets_sent_le; 578 if (free_slots_classic < 0){ 579 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); 580 return 0; 581 } 582 } 583 584 switch (address_type){ 585 case BD_ADDR_TYPE_UNKNOWN: 586 log_error("hci_number_free_acl_slots: unknown address type"); 587 return 0; 588 589 case BD_ADDR_TYPE_ACL: 590 return (uint16_t) free_slots_classic; 591 592 default: 593 if (hci_stack->le_acl_packets_total_num > 0){ 594 return (uint16_t) free_slots_le; 595 } 596 return (uint16_t) free_slots_classic; 597 } 598 } 599 600 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 601 // get connection type 602 hci_connection_t * connection = hci_connection_for_handle(con_handle); 603 if (!connection){ 604 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 605 return 0; 606 } 607 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 608 } 609 610 #ifdef ENABLE_CLASSIC 611 static int hci_number_free_sco_slots(void){ 612 unsigned int num_sco_packets_sent = 0; 613 btstack_linked_item_t *it; 614 if (hci_stack->synchronous_flow_control_enabled){ 615 // explicit flow control 616 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 617 hci_connection_t * connection = (hci_connection_t *) it; 618 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 619 num_sco_packets_sent += connection->num_packets_sent; 620 } 621 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 622 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 623 return 0; 624 } 625 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 626 } else { 627 // implicit flow control -- TODO 628 int num_ready = 0; 629 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 630 hci_connection_t * connection = (hci_connection_t *) it; 631 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 632 if (connection->sco_tx_ready == 0) continue; 633 num_ready++; 634 } 635 return num_ready; 636 } 637 } 638 #endif 639 640 // only used to send HCI Host Number Completed Packets 641 static int hci_can_send_comand_packet_transport(void){ 642 if (hci_stack->hci_packet_buffer_reserved) return 0; 643 644 // check for async hci transport implementations 645 if (hci_stack->hci_transport->can_send_packet_now){ 646 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 647 return 0; 648 } 649 } 650 return 1; 651 } 652 653 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 654 bool hci_can_send_command_packet_now(void){ 655 if (hci_can_send_comand_packet_transport() == 0) return false; 656 return hci_stack->num_cmd_packets > 0u; 657 } 658 659 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 660 // check for async hci transport implementations 661 if (!hci_stack->hci_transport->can_send_packet_now) return true; 662 return hci_stack->hci_transport->can_send_packet_now(packet_type); 663 } 664 665 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 666 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 667 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 668 } 669 670 bool hci_can_send_acl_le_packet_now(void){ 671 if (hci_stack->hci_packet_buffer_reserved) return false; 672 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 673 } 674 675 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 676 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 677 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 678 } 679 680 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 681 if (hci_stack->hci_packet_buffer_reserved) return false; 682 return hci_can_send_prepared_acl_packet_now(con_handle); 683 } 684 685 #ifdef ENABLE_CLASSIC 686 bool hci_can_send_acl_classic_packet_now(void){ 687 if (hci_stack->hci_packet_buffer_reserved) return false; 688 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 689 } 690 691 bool hci_can_send_prepared_sco_packet_now(void){ 692 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 693 if (hci_have_usb_transport()){ 694 return hci_stack->sco_can_send_now; 695 } else { 696 return hci_number_free_sco_slots() > 0; 697 } 698 } 699 700 bool hci_can_send_sco_packet_now(void){ 701 if (hci_stack->hci_packet_buffer_reserved) return false; 702 return hci_can_send_prepared_sco_packet_now(); 703 } 704 705 void hci_request_sco_can_send_now_event(void){ 706 hci_stack->sco_waiting_for_can_send_now = 1; 707 hci_notify_if_sco_can_send_now(); 708 } 709 #endif 710 711 // used for internal checks in l2cap.c 712 bool hci_is_packet_buffer_reserved(void){ 713 return hci_stack->hci_packet_buffer_reserved; 714 } 715 716 // reserves outgoing packet buffer. 717 // @return 1 if successful 718 bool hci_reserve_packet_buffer(void){ 719 if (hci_stack->hci_packet_buffer_reserved) { 720 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 721 return false; 722 } 723 hci_stack->hci_packet_buffer_reserved = true; 724 return true; 725 } 726 727 void hci_release_packet_buffer(void){ 728 hci_stack->hci_packet_buffer_reserved = false; 729 } 730 731 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 732 static int hci_transport_synchronous(void){ 733 return hci_stack->hci_transport->can_send_packet_now == NULL; 734 } 735 736 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 737 738 // 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); 739 740 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 741 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 742 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 743 max_acl_data_packet_length = hci_stack->le_data_packets_length; 744 } 745 746 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 747 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 748 max_acl_data_packet_length = connection->le_max_tx_octets; 749 } 750 #endif 751 752 log_debug("hci_send_acl_packet_fragments entered"); 753 754 uint8_t status = ERROR_CODE_SUCCESS; 755 // multiple packets could be send on a synchronous HCI transport 756 while (true){ 757 758 log_debug("hci_send_acl_packet_fragments loop entered"); 759 760 // get current data 761 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 762 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 763 bool more_fragments = false; 764 765 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 766 if (current_acl_data_packet_length > max_acl_data_packet_length){ 767 more_fragments = true; 768 current_acl_data_packet_length = max_acl_data_packet_length; 769 } 770 771 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 772 if (acl_header_pos > 0u){ 773 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 774 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 775 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 776 } 777 778 // update header len 779 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 780 781 // count packet 782 connection->num_packets_sent++; 783 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 784 785 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 786 if (more_fragments){ 787 // update start of next fragment to send 788 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 789 } else { 790 // done 791 hci_stack->acl_fragmentation_pos = 0; 792 hci_stack->acl_fragmentation_total_size = 0; 793 } 794 795 // send packet 796 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 797 const int size = current_acl_data_packet_length + 4; 798 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 799 hci_stack->acl_fragmentation_tx_active = 1; 800 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 801 if (err != 0){ 802 // no error from HCI Transport expected 803 status = ERROR_CODE_HARDWARE_FAILURE; 804 } 805 806 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 807 808 // done yet? 809 if (!more_fragments) break; 810 811 // can send more? 812 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 813 } 814 815 log_debug("hci_send_acl_packet_fragments loop over"); 816 817 // release buffer now for synchronous transport 818 if (hci_transport_synchronous()){ 819 hci_stack->acl_fragmentation_tx_active = 0; 820 hci_release_packet_buffer(); 821 hci_emit_transport_packet_sent(); 822 } 823 824 return status; 825 } 826 827 // pre: caller has reserved the packet buffer 828 uint8_t hci_send_acl_packet_buffer(int size){ 829 btstack_assert(hci_stack->hci_packet_buffer_reserved); 830 831 uint8_t * packet = hci_stack->hci_packet_buffer; 832 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 833 834 // check for free places on Bluetooth module 835 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 836 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 837 hci_release_packet_buffer(); 838 hci_emit_transport_packet_sent(); 839 return BTSTACK_ACL_BUFFERS_FULL; 840 } 841 842 hci_connection_t *connection = hci_connection_for_handle( con_handle); 843 if (!connection) { 844 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 845 hci_release_packet_buffer(); 846 hci_emit_transport_packet_sent(); 847 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 848 } 849 850 #ifdef ENABLE_CLASSIC 851 hci_connection_timestamp(connection); 852 #endif 853 854 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 855 856 // setup data 857 hci_stack->acl_fragmentation_total_size = size; 858 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 859 860 return hci_send_acl_packet_fragments(connection); 861 } 862 863 #ifdef ENABLE_CLASSIC 864 // pre: caller has reserved the packet buffer 865 uint8_t hci_send_sco_packet_buffer(int size){ 866 btstack_assert(hci_stack->hci_packet_buffer_reserved); 867 868 uint8_t * packet = hci_stack->hci_packet_buffer; 869 870 // skip checks in loopback mode 871 if (!hci_stack->loopback_mode){ 872 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 873 874 // check for free places on Bluetooth module 875 if (!hci_can_send_prepared_sco_packet_now()) { 876 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 877 hci_release_packet_buffer(); 878 hci_emit_transport_packet_sent(); 879 return BTSTACK_ACL_BUFFERS_FULL; 880 } 881 882 // track send packet in connection struct 883 hci_connection_t *connection = hci_connection_for_handle( con_handle); 884 if (!connection) { 885 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 889 } 890 891 if (hci_have_usb_transport()){ 892 // token used 893 hci_stack->sco_can_send_now = false; 894 } else { 895 if (hci_stack->synchronous_flow_control_enabled){ 896 connection->num_packets_sent++; 897 } else { 898 connection->sco_tx_ready--; 899 } 900 } 901 } 902 903 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 904 905 #ifdef HAVE_SCO_TRANSPORT 906 hci_stack->sco_transport->send_packet(packet, size); 907 hci_release_packet_buffer(); 908 hci_emit_transport_packet_sent(); 909 910 return 0; 911 #else 912 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 913 if (hci_transport_synchronous()){ 914 hci_release_packet_buffer(); 915 hci_emit_transport_packet_sent(); 916 } 917 918 if (err != 0){ 919 return ERROR_CODE_HARDWARE_FAILURE; 920 } 921 return ERROR_CODE_SUCCESS; 922 #endif 923 } 924 #endif 925 926 static void acl_handler(uint8_t *packet, uint16_t size){ 927 928 // get info 929 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 930 hci_connection_t *conn = hci_connection_for_handle(con_handle); 931 uint8_t acl_flags = READ_ACL_FLAGS(packet); 932 uint16_t acl_length = READ_ACL_LENGTH(packet); 933 934 // ignore non-registered handle 935 if (!conn){ 936 log_error("acl_handler called with non-registered handle %u!" , con_handle); 937 return; 938 } 939 940 // assert packet is complete 941 if ((acl_length + 4u) != size){ 942 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 943 return; 944 } 945 946 #ifdef ENABLE_CLASSIC 947 // update idle timestamp 948 hci_connection_timestamp(conn); 949 #endif 950 951 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 952 hci_stack->host_completed_packets = 1; 953 conn->num_packets_completed++; 954 #endif 955 956 // handle different packet types 957 switch (acl_flags & 0x03u) { 958 959 case 0x01: // continuation fragment 960 961 // sanity checks 962 if (conn->acl_recombination_pos == 0u) { 963 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 964 return; 965 } 966 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 967 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 968 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 969 conn->acl_recombination_pos = 0; 970 return; 971 } 972 973 // append fragment payload (header already stored) 974 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 975 &packet[4], acl_length); 976 conn->acl_recombination_pos += acl_length; 977 978 // forward complete L2CAP packet if complete. 979 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 980 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 981 // reset recombination buffer 982 conn->acl_recombination_length = 0; 983 conn->acl_recombination_pos = 0; 984 } 985 break; 986 987 case 0x02: { // first fragment 988 989 // sanity check 990 if (conn->acl_recombination_pos) { 991 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 992 conn->acl_recombination_pos = 0; 993 } 994 995 // peek into L2CAP packet! 996 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 997 998 // compare fragment size to L2CAP packet size 999 if (acl_length >= (l2cap_length + 4u)){ 1000 // forward fragment as L2CAP packet 1001 hci_emit_acl_packet(packet, acl_length + 4u); 1002 } else { 1003 1004 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1005 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1006 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1007 return; 1008 } 1009 1010 // store first fragment and tweak acl length for complete package 1011 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1012 packet, acl_length + 4u); 1013 conn->acl_recombination_pos = acl_length + 4u; 1014 conn->acl_recombination_length = l2cap_length; 1015 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1016 } 1017 break; 1018 1019 } 1020 default: 1021 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1022 return; 1023 } 1024 1025 // execute main loop 1026 hci_run(); 1027 } 1028 1029 static void hci_connection_stop_timer(hci_connection_t * conn){ 1030 btstack_run_loop_remove_timer(&conn->timeout); 1031 #ifdef ENABLE_CLASSIC 1032 btstack_run_loop_remove_timer(&conn->timeout_sco); 1033 #endif 1034 } 1035 1036 static void hci_shutdown_connection(hci_connection_t *conn){ 1037 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1038 1039 #ifdef ENABLE_CLASSIC 1040 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1041 bd_addr_type_t addr_type = conn->address_type; 1042 #endif 1043 #ifdef HAVE_SCO_TRANSPORT 1044 hci_con_handle_t con_handle = conn->con_handle; 1045 #endif 1046 #endif 1047 1048 hci_connection_stop_timer(conn); 1049 1050 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1051 btstack_memory_hci_connection_free( conn ); 1052 1053 // now it's gone 1054 hci_emit_nr_connections_changed(); 1055 1056 #ifdef ENABLE_CLASSIC 1057 #ifdef ENABLE_SCO_OVER_HCI 1058 // update SCO 1059 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1060 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1061 } 1062 #endif 1063 #ifdef HAVE_SCO_TRANSPORT 1064 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1065 hci_stack->sco_transport->close(con_handle); 1066 } 1067 #endif 1068 #endif 1069 } 1070 1071 #ifdef ENABLE_CLASSIC 1072 1073 static const uint16_t packet_type_sizes[] = { 1074 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1075 HCI_ACL_DH1_SIZE, 0, 0, 0, 1076 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1077 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1078 }; 1079 static const uint8_t packet_type_feature_requirement_bit[] = { 1080 0, // 3 slot packets 1081 1, // 5 slot packets 1082 25, // EDR 2 mpbs 1083 26, // EDR 3 mbps 1084 39, // 3 slot EDR packts 1085 40, // 5 slot EDR packet 1086 }; 1087 static const uint16_t packet_type_feature_packet_mask[] = { 1088 0x0f00, // 3 slot packets 1089 0xf000, // 5 slot packets 1090 0x1102, // EDR 2 mpbs 1091 0x2204, // EDR 3 mbps 1092 0x0300, // 3 slot EDR packts 1093 0x3000, // 5 slot EDR packet 1094 }; 1095 1096 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1097 // enable packet types based on size 1098 uint16_t packet_types = 0; 1099 unsigned int i; 1100 for (i=0;i<16;i++){ 1101 if (packet_type_sizes[i] == 0) continue; 1102 if (packet_type_sizes[i] <= buffer_size){ 1103 packet_types |= 1 << i; 1104 } 1105 } 1106 // disable packet types due to missing local supported features 1107 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1108 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1109 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1110 if (feature_set) continue; 1111 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1112 packet_types &= ~packet_type_feature_packet_mask[i]; 1113 } 1114 // flip bits for "may not be used" 1115 packet_types ^= 0x3306; 1116 return packet_types; 1117 } 1118 1119 uint16_t hci_usable_acl_packet_types(void){ 1120 return hci_stack->packet_types; 1121 } 1122 #endif 1123 1124 uint8_t* hci_get_outgoing_packet_buffer(void){ 1125 // hci packet buffer is >= acl data packet length 1126 return hci_stack->hci_packet_buffer; 1127 } 1128 1129 uint16_t hci_max_acl_data_packet_length(void){ 1130 return hci_stack->acl_data_packet_length; 1131 } 1132 1133 #ifdef ENABLE_CLASSIC 1134 bool hci_extended_sco_link_supported(void){ 1135 // No. 31, byte 3, bit 7 1136 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1137 } 1138 #endif 1139 1140 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1141 // No. 54, byte 6, bit 6 1142 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1143 } 1144 1145 static int gap_ssp_supported(void){ 1146 // No. 51, byte 6, bit 3 1147 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1148 } 1149 1150 static int hci_classic_supported(void){ 1151 #ifdef ENABLE_CLASSIC 1152 // No. 37, byte 4, bit 5, = No BR/EDR Support 1153 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1154 #else 1155 return 0; 1156 #endif 1157 } 1158 1159 static int hci_le_supported(void){ 1160 #ifdef ENABLE_BLE 1161 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1162 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1163 #else 1164 return 0; 1165 #endif 1166 } 1167 1168 #ifdef ENABLE_BLE 1169 1170 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1171 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1172 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1173 } else { 1174 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1175 } 1176 } 1177 1178 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1179 *addr_type = hci_stack->le_own_addr_type; 1180 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1181 } 1182 1183 #ifdef ENABLE_LE_PERIPHERAL 1184 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1185 *addr_type = hci_stack->le_advertisements_own_addr_type; 1186 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1187 }; 1188 #endif 1189 1190 #ifdef ENABLE_LE_CENTRAL 1191 1192 /** 1193 * @brief Get own addr type and address used for LE connections (Central) 1194 */ 1195 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1196 *addr_type = hci_stack->le_connection_own_addr_type; 1197 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1198 } 1199 1200 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1201 1202 int offset = 3; 1203 int num_reports = packet[offset]; 1204 offset += 1; 1205 1206 int i; 1207 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1208 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1209 for (i=0; (i<num_reports) && (offset < size);i++){ 1210 // sanity checks on data_length: 1211 uint8_t data_length = packet[offset + 8]; 1212 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1213 if ((offset + 9u + data_length + 1u) > size) return; 1214 // setup event 1215 uint8_t event_size = 10u + data_length; 1216 int pos = 0; 1217 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1218 event[pos++] = event_size; 1219 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1220 offset += 8; 1221 pos += 8; 1222 event[pos++] = packet[offset + 1 + data_length]; // rssi 1223 event[pos++] = data_length; 1224 offset++; 1225 (void)memcpy(&event[pos], &packet[offset], data_length); 1226 pos += data_length; 1227 offset += data_length + 1u; // rssi 1228 hci_emit_event(event, pos, 1); 1229 } 1230 } 1231 #endif 1232 #endif 1233 1234 #ifdef ENABLE_BLE 1235 #ifdef ENABLE_LE_PERIPHERAL 1236 static void hci_update_advertisements_enabled_for_current_roles(void){ 1237 if (hci_stack->le_advertisements_enabled){ 1238 // get number of active le slave connections 1239 int num_slave_connections = 0; 1240 btstack_linked_list_iterator_t it; 1241 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1242 while (btstack_linked_list_iterator_has_next(&it)){ 1243 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1244 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1245 if (con->state != OPEN) continue; 1246 if (con->role != HCI_ROLE_SLAVE) continue; 1247 if (!hci_is_le_connection(con)) continue; 1248 num_slave_connections++; 1249 } 1250 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1251 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1252 } else { 1253 hci_stack->le_advertisements_enabled_for_current_roles = false; 1254 } 1255 } 1256 #endif 1257 #endif 1258 1259 #ifdef ENABLE_CLASSIC 1260 static void gap_run_set_local_name(void){ 1261 hci_reserve_packet_buffer(); 1262 uint8_t * packet = hci_stack->hci_packet_buffer; 1263 // construct HCI Command and send 1264 uint16_t opcode = hci_write_local_name.opcode; 1265 hci_stack->last_cmd_opcode = opcode; 1266 packet[0] = opcode & 0xff; 1267 packet[1] = opcode >> 8; 1268 packet[2] = DEVICE_NAME_LEN; 1269 memset(&packet[3], 0, DEVICE_NAME_LEN); 1270 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1271 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1272 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1273 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1274 // expand '00:00:00:00:00:00' in name with bd_addr 1275 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1276 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1277 } 1278 1279 static void gap_run_set_eir_data(void){ 1280 hci_reserve_packet_buffer(); 1281 uint8_t * packet = hci_stack->hci_packet_buffer; 1282 // construct HCI Command in-place and send 1283 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1284 hci_stack->last_cmd_opcode = opcode; 1285 uint16_t offset = 0; 1286 packet[offset++] = opcode & 0xff; 1287 packet[offset++] = opcode >> 8; 1288 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1289 packet[offset++] = 0; // FEC not required 1290 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1291 if (hci_stack->eir_data){ 1292 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1293 ad_context_t context; 1294 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1295 uint8_t data_type = ad_iterator_get_data_type(&context); 1296 uint8_t size = ad_iterator_get_data_len(&context); 1297 const uint8_t *data = ad_iterator_get_data(&context); 1298 // copy item 1299 packet[offset++] = size + 1; 1300 packet[offset++] = data_type; 1301 memcpy(&packet[offset], data, size); 1302 // update name item 1303 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1304 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1305 } 1306 offset += size; 1307 } 1308 } else { 1309 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1310 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1311 packet[offset++] = bytes_to_copy + 1; 1312 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1313 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1314 // expand '00:00:00:00:00:00' in name with bd_addr 1315 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1316 } 1317 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1318 } 1319 1320 static void hci_run_gap_tasks_classic(void){ 1321 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1322 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1323 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1324 return; 1325 } 1326 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1327 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1328 gap_run_set_local_name(); 1329 return; 1330 } 1331 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1332 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1333 gap_run_set_eir_data(); 1334 return; 1335 } 1336 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1337 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1338 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1339 return; 1340 } 1341 // write page scan activity 1342 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1343 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1344 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1345 return; 1346 } 1347 // write page scan type 1348 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1349 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1350 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1351 return; 1352 } 1353 // write page timeout 1354 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1355 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1356 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1357 return; 1358 } 1359 // send scan enable 1360 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1361 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1362 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1363 return; 1364 } 1365 // send write scan activity 1366 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1367 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1368 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1369 return; 1370 } 1371 } 1372 #endif 1373 1374 #ifndef HAVE_HOST_CONTROLLER_API 1375 1376 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1377 if (!hci_stack->config) return 0; 1378 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1379 // Limit baud rate for Broadcom chipsets to 3 mbps 1380 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1381 baud_rate = 3000000; 1382 } 1383 return baud_rate; 1384 } 1385 1386 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1387 UNUSED(ds); 1388 1389 switch (hci_stack->substate){ 1390 case HCI_INIT_W4_SEND_RESET: 1391 log_info("Resend HCI Reset"); 1392 hci_stack->substate = HCI_INIT_SEND_RESET; 1393 hci_stack->num_cmd_packets = 1; 1394 hci_run(); 1395 break; 1396 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1397 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1398 if (hci_stack->hci_transport->reset_link){ 1399 hci_stack->hci_transport->reset_link(); 1400 } 1401 1402 /* fall through */ 1403 1404 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1405 log_info("Resend HCI Reset - CSR Warm Boot"); 1406 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1407 hci_stack->num_cmd_packets = 1; 1408 hci_run(); 1409 break; 1410 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1411 if (hci_stack->hci_transport->set_baudrate){ 1412 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1413 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1414 hci_stack->hci_transport->set_baudrate(baud_rate); 1415 } 1416 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1417 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1418 if (hci_stack->hci_transport->reset_link){ 1419 log_info("Link Reset"); 1420 hci_stack->hci_transport->reset_link(); 1421 } 1422 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1423 hci_run(); 1424 } 1425 break; 1426 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1427 // otherwise continue 1428 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1429 hci_send_cmd(&hci_read_local_supported_commands); 1430 break; 1431 default: 1432 break; 1433 } 1434 } 1435 #endif 1436 1437 static void hci_initializing_next_state(void){ 1438 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1439 } 1440 1441 static void hci_init_done(void){ 1442 // done. tell the app 1443 log_info("hci_init_done -> HCI_STATE_WORKING"); 1444 hci_stack->state = HCI_STATE_WORKING; 1445 hci_emit_state(); 1446 } 1447 1448 // assumption: hci_can_send_command_packet_now() == true 1449 static void hci_initializing_run(void){ 1450 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1451 1452 #ifndef HAVE_HOST_CONTROLLER_API 1453 bool need_baud_change = hci_stack->config 1454 && hci_stack->chipset 1455 && hci_stack->chipset->set_baudrate_command 1456 && hci_stack->hci_transport->set_baudrate 1457 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1458 #endif 1459 1460 switch (hci_stack->substate){ 1461 case HCI_INIT_SEND_RESET: 1462 hci_state_reset(); 1463 1464 #ifndef HAVE_HOST_CONTROLLER_API 1465 // prepare reset if command complete not received in 100ms 1466 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1467 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1468 btstack_run_loop_add_timer(&hci_stack->timeout); 1469 #endif 1470 // send command 1471 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1472 hci_send_cmd(&hci_reset); 1473 break; 1474 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1475 hci_send_cmd(&hci_read_local_version_information); 1476 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1477 break; 1478 1479 #ifndef HAVE_HOST_CONTROLLER_API 1480 case HCI_INIT_SEND_READ_LOCAL_NAME: 1481 hci_send_cmd(&hci_read_local_name); 1482 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1483 break; 1484 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1485 hci_state_reset(); 1486 // prepare reset if command complete not received in 100ms 1487 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1488 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1489 btstack_run_loop_add_timer(&hci_stack->timeout); 1490 // send command 1491 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1492 hci_send_cmd(&hci_reset); 1493 break; 1494 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1495 hci_state_reset(); 1496 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1497 hci_send_cmd(&hci_reset); 1498 break; 1499 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1500 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1501 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1502 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1503 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1504 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1505 break; 1506 } 1507 case HCI_INIT_SET_BD_ADDR: 1508 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1509 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1510 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1511 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1512 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1513 break; 1514 case HCI_INIT_SEND_BAUD_CHANGE: 1515 if (need_baud_change) { 1516 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1517 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1518 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1519 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1520 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1521 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1522 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1523 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1524 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1525 btstack_run_loop_add_timer(&hci_stack->timeout); 1526 } 1527 break; 1528 } 1529 1530 /* fall through */ 1531 1532 case HCI_INIT_CUSTOM_INIT: 1533 // Custom initialization 1534 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1535 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1536 bool send_cmd = false; 1537 switch (hci_stack->chipset_result){ 1538 case BTSTACK_CHIPSET_VALID_COMMAND: 1539 send_cmd = true; 1540 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1541 break; 1542 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1543 send_cmd = true; 1544 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1545 log_info("CSR Warm Boot"); 1546 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1547 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1548 btstack_run_loop_add_timer(&hci_stack->timeout); 1549 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1550 && hci_stack->config 1551 && hci_stack->chipset 1552 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1553 && hci_stack->hci_transport->set_baudrate 1554 && hci_transport_uart_get_main_baud_rate()){ 1555 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1556 } else { 1557 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1558 } 1559 break; 1560 default: 1561 break; 1562 } 1563 1564 if (send_cmd){ 1565 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1566 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1567 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1568 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1569 break; 1570 } 1571 log_info("Init script done"); 1572 1573 // Init script download on Broadcom chipsets causes: 1574 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1575 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1576 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1577 1578 // - baud rate to reset, restore UART baud rate if needed 1579 if (need_baud_change) { 1580 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1581 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1582 hci_stack->hci_transport->set_baudrate(baud_rate); 1583 } 1584 1585 uint16_t bcm_delay_ms = 300; 1586 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1587 // -> Work around: wait here. 1588 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1589 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1590 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1591 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1592 btstack_run_loop_add_timer(&hci_stack->timeout); 1593 break; 1594 } 1595 } 1596 #endif 1597 /* fall through */ 1598 1599 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1600 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1601 hci_send_cmd(&hci_read_local_supported_commands); 1602 break; 1603 case HCI_INIT_READ_BD_ADDR: 1604 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1605 hci_send_cmd(&hci_read_bd_addr); 1606 break; 1607 case HCI_INIT_READ_BUFFER_SIZE: 1608 // only read buffer size if supported 1609 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1610 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1611 hci_send_cmd(&hci_read_buffer_size); 1612 break; 1613 } 1614 1615 /* fall through */ 1616 1617 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1618 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1619 hci_send_cmd(&hci_read_local_supported_features); 1620 break; 1621 1622 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1623 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1624 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1625 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1626 break; 1627 case HCI_INIT_HOST_BUFFER_SIZE: 1628 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1629 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1630 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1631 break; 1632 #endif 1633 1634 case HCI_INIT_SET_EVENT_MASK: 1635 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1636 if (hci_le_supported()){ 1637 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1638 } else { 1639 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1640 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1641 } 1642 break; 1643 1644 #ifdef ENABLE_CLASSIC 1645 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1646 if (hci_classic_supported() && gap_ssp_supported()){ 1647 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1648 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1649 break; 1650 } 1651 1652 /* fall through */ 1653 1654 case HCI_INIT_WRITE_INQUIRY_MODE: 1655 if (hci_classic_supported()){ 1656 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1657 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1658 break; 1659 } 1660 1661 /* fall through */ 1662 1663 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1664 // skip write secure connections host support if not supported or disabled 1665 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1666 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1667 hci_stack->secure_connections_active = true; 1668 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1669 break; 1670 } 1671 1672 #ifdef ENABLE_SCO_OVER_HCI 1673 /* fall through */ 1674 1675 // only sent if ENABLE_SCO_OVER_HCI is defined 1676 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1677 // skip write synchronous flow control if not supported 1678 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1679 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1680 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1681 break; 1682 } 1683 /* fall through */ 1684 1685 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1686 // skip write default erroneous data reporting if not supported 1687 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1688 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1689 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1690 break; 1691 } 1692 #endif 1693 1694 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1695 /* fall through */ 1696 1697 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1698 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1699 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1700 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1701 #ifdef ENABLE_SCO_OVER_HCI 1702 log_info("BCM: Route SCO data via HCI transport"); 1703 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1704 #endif 1705 #ifdef ENABLE_SCO_OVER_PCM 1706 log_info("BCM: Route SCO data via PCM interface"); 1707 #ifdef ENABLE_BCM_PCM_WBS 1708 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1709 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1710 #else 1711 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1712 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1713 #endif 1714 #endif 1715 break; 1716 } 1717 #endif 1718 1719 #ifdef ENABLE_SCO_OVER_PCM 1720 /* fall through */ 1721 1722 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1723 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1724 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1725 log_info("BCM: Config PCM interface for I2S"); 1726 #ifdef ENABLE_BCM_PCM_WBS 1727 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1728 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1729 #else 1730 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1731 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1732 #endif 1733 break; 1734 } 1735 #endif 1736 #endif 1737 1738 #ifdef ENABLE_BLE 1739 /* fall through */ 1740 1741 // LE INIT 1742 case HCI_INIT_LE_READ_BUFFER_SIZE: 1743 if (hci_le_supported()){ 1744 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1745 hci_send_cmd(&hci_le_read_buffer_size); 1746 break; 1747 } 1748 1749 /* fall through */ 1750 1751 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1752 // skip write le host if not supported (e.g. on LE only EM9301) 1753 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1754 // LE Supported Host = 1, Simultaneous Host = 0 1755 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1756 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1757 break; 1758 } 1759 1760 /* fall through */ 1761 1762 case HCI_INIT_LE_SET_EVENT_MASK: 1763 if (hci_le_supported()){ 1764 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1765 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1766 break; 1767 } 1768 #endif 1769 1770 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1771 /* fall through */ 1772 1773 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1774 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1775 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1776 hci_send_cmd(&hci_le_read_maximum_data_length); 1777 break; 1778 } 1779 1780 /* fall through */ 1781 1782 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1783 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1784 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1785 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1786 break; 1787 } 1788 #endif 1789 1790 #ifdef ENABLE_LE_CENTRAL 1791 /* fall through */ 1792 1793 case HCI_INIT_READ_WHITE_LIST_SIZE: 1794 if (hci_le_supported()){ 1795 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1796 hci_send_cmd(&hci_le_read_white_list_size); 1797 break; 1798 } 1799 1800 /* fall through */ 1801 1802 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1803 if (hci_le_supported()){ 1804 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1805 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); 1806 break; 1807 } 1808 #endif 1809 1810 /* fall through */ 1811 1812 case HCI_INIT_DONE: 1813 hci_stack->substate = HCI_INIT_DONE; 1814 #ifdef ENABLE_CLASSIC 1815 // init sequence complete, check if GAP Tasks are completed 1816 if (hci_stack->gap_tasks != 0) { 1817 hci_run_gap_tasks_classic(); 1818 break; 1819 } 1820 #endif 1821 hci_init_done(); 1822 break; 1823 1824 default: 1825 return; 1826 } 1827 } 1828 1829 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1830 bool command_completed = false; 1831 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1832 uint16_t opcode = little_endian_read_16(packet,3); 1833 if (opcode == hci_stack->last_cmd_opcode){ 1834 command_completed = true; 1835 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1836 } else { 1837 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1838 } 1839 } 1840 1841 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1842 uint8_t status = packet[2]; 1843 uint16_t opcode = little_endian_read_16(packet,4); 1844 if (opcode == hci_stack->last_cmd_opcode){ 1845 if (status){ 1846 command_completed = true; 1847 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1848 } else { 1849 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1850 } 1851 } else { 1852 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1853 } 1854 } 1855 #ifndef HAVE_HOST_CONTROLLER_API 1856 // Vendor == CSR 1857 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1858 // TODO: track actual command 1859 command_completed = true; 1860 } 1861 1862 // Vendor == Toshiba 1863 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1864 // TODO: track actual command 1865 command_completed = true; 1866 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1867 hci_stack->num_cmd_packets = 1; 1868 } 1869 #endif 1870 1871 return command_completed; 1872 } 1873 1874 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1875 1876 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1877 1878 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1879 1880 #ifndef HAVE_HOST_CONTROLLER_API 1881 1882 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1883 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1884 // 1885 // HCI Reset 1886 // Timeout 100 ms 1887 // HCI Reset 1888 // Command Complete Reset 1889 // HCI Read Local Version Information 1890 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1891 // hang... 1892 // 1893 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1894 if (!command_completed 1895 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1896 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1897 1898 uint16_t opcode = little_endian_read_16(packet,3); 1899 if (opcode == hci_reset.opcode){ 1900 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1901 return; 1902 } 1903 } 1904 1905 // CSR & H5 1906 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1907 if (!command_completed 1908 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1909 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1910 1911 uint16_t opcode = little_endian_read_16(packet,3); 1912 if (opcode == hci_reset.opcode){ 1913 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1914 return; 1915 } 1916 } 1917 1918 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1919 // fix: Correct substate and behave as command below 1920 if (command_completed){ 1921 switch (hci_stack->substate){ 1922 case HCI_INIT_SEND_RESET: 1923 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1924 break; 1925 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1926 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1927 break; 1928 default: 1929 break; 1930 } 1931 } 1932 1933 #endif 1934 1935 if (!command_completed) return; 1936 1937 bool need_baud_change = false; 1938 bool need_addr_change = false; 1939 1940 #ifndef HAVE_HOST_CONTROLLER_API 1941 need_baud_change = hci_stack->config 1942 && hci_stack->chipset 1943 && hci_stack->chipset->set_baudrate_command 1944 && hci_stack->hci_transport->set_baudrate 1945 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1946 1947 need_addr_change = hci_stack->custom_bd_addr_set 1948 && hci_stack->chipset 1949 && hci_stack->chipset->set_bd_addr_command; 1950 #endif 1951 1952 switch(hci_stack->substate){ 1953 1954 #ifndef HAVE_HOST_CONTROLLER_API 1955 case HCI_INIT_SEND_RESET: 1956 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1957 // fix: just correct substate and behave as command below 1958 1959 /* fall through */ 1960 #endif 1961 1962 case HCI_INIT_W4_SEND_RESET: 1963 btstack_run_loop_remove_timer(&hci_stack->timeout); 1964 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1965 return; 1966 1967 #ifndef HAVE_HOST_CONTROLLER_API 1968 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1969 // for STLC2500D, baud rate change already happened. 1970 // for others, baud rate gets changed now 1971 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1972 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1973 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1974 hci_stack->hci_transport->set_baudrate(baud_rate); 1975 } 1976 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1977 return; 1978 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1979 btstack_run_loop_remove_timer(&hci_stack->timeout); 1980 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1981 return; 1982 case HCI_INIT_W4_CUSTOM_INIT: 1983 // repeat custom init 1984 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1985 return; 1986 #endif 1987 1988 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1989 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1990 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1991 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1992 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1993 return; 1994 } 1995 if (need_addr_change){ 1996 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1997 return; 1998 } 1999 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2000 return; 2001 #ifndef HAVE_HOST_CONTROLLER_API 2002 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2003 if (need_baud_change){ 2004 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2005 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2006 hci_stack->hci_transport->set_baudrate(baud_rate); 2007 } 2008 if (need_addr_change){ 2009 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2010 return; 2011 } 2012 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2013 return; 2014 case HCI_INIT_W4_SET_BD_ADDR: 2015 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2016 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2017 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2018 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2019 return; 2020 } 2021 // skipping st warm boot 2022 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2023 return; 2024 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2025 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2026 return; 2027 #endif 2028 2029 case HCI_INIT_DONE: 2030 // set state if we came here by fall through 2031 hci_stack->substate = HCI_INIT_DONE; 2032 return; 2033 2034 default: 2035 break; 2036 } 2037 hci_initializing_next_state(); 2038 } 2039 2040 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2041 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2042 bd_addr_t bd_address; 2043 (void)memcpy(&bd_address, conn->address, 6); 2044 2045 #ifdef ENABLE_CLASSIC 2046 // cache needed data 2047 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2048 #endif 2049 2050 // connection failed, remove entry 2051 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2052 btstack_memory_hci_connection_free( conn ); 2053 2054 #ifdef ENABLE_CLASSIC 2055 // notify client if dedicated bonding 2056 if (notify_dedicated_bonding_failed){ 2057 log_info("hci notify_dedicated_bonding_failed"); 2058 hci_emit_dedicated_bonding_result(bd_address, status); 2059 } 2060 2061 // if authentication error, also delete link key 2062 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2063 gap_drop_link_key_for_bd_addr(bd_address); 2064 } 2065 #else 2066 UNUSED(status); 2067 #endif 2068 } 2069 2070 #ifdef ENABLE_CLASSIC 2071 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2072 // SSP Controller 2073 if (features[6] & (1 << 3)){ 2074 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2075 } 2076 // eSCO 2077 if (features[3] & (1<<7)){ 2078 conn->remote_supported_features[0] |= 1; 2079 } 2080 // Extended features 2081 if (features[7] & (1<<7)){ 2082 conn->remote_supported_features[0] |= 2; 2083 } 2084 } 2085 2086 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2087 // SSP Host 2088 if (features[0] & (1 << 0)){ 2089 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2090 } 2091 // SC Host 2092 if (features[0] & (1 << 3)){ 2093 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2094 } 2095 } 2096 2097 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2098 // SC Controller 2099 if (features[1] & (1 << 0)){ 2100 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2101 } 2102 } 2103 2104 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2105 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2106 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2107 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2108 if (conn->bonding_flags & BONDING_DEDICATED){ 2109 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2110 } 2111 } 2112 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2113 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2114 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2115 } 2116 2117 #endif 2118 2119 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2120 // handle BT initialization 2121 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2122 hci_initializing_event_handler(packet, size); 2123 } 2124 2125 // help with BT sleep 2126 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2127 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2128 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2129 hci_initializing_next_state(); 2130 } 2131 } 2132 2133 #ifdef ENABLE_CLASSIC 2134 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2135 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2136 conn->encryption_key_size = encryption_key_size; 2137 2138 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2139 conn->requested_security_level = LEVEL_0; 2140 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2141 return; 2142 } 2143 2144 // Request remote features if not already done 2145 hci_trigger_remote_features_for_connection(conn); 2146 2147 // Request Authentication if not already done 2148 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2149 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2150 } 2151 #endif 2152 2153 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2154 UNUSED(size); 2155 2156 uint16_t manufacturer; 2157 #ifdef ENABLE_CLASSIC 2158 hci_con_handle_t handle; 2159 hci_connection_t * conn; 2160 uint8_t status; 2161 #endif 2162 // get num cmd packets - limit to 1 to reduce complexity 2163 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2164 2165 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2166 switch (opcode){ 2167 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2168 if (packet[5]) break; 2169 // terminate, name 248 chars 2170 packet[6+248] = 0; 2171 log_info("local name: %s", &packet[6]); 2172 break; 2173 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2174 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2175 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2176 uint16_t acl_len = little_endian_read_16(packet, 6); 2177 uint16_t sco_len = packet[8]; 2178 2179 // determine usable ACL/SCO payload size 2180 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2181 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2182 2183 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2184 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2185 2186 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2187 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2188 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2189 } 2190 break; 2191 case HCI_OPCODE_HCI_READ_RSSI: 2192 if (packet[5] == ERROR_CODE_SUCCESS){ 2193 uint8_t event[5]; 2194 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2195 event[1] = 3; 2196 (void)memcpy(&event[2], &packet[6], 3); 2197 hci_emit_event(event, sizeof(event), 1); 2198 } 2199 break; 2200 #ifdef ENABLE_BLE 2201 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2202 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2203 hci_stack->le_acl_packets_total_num = packet[8]; 2204 // determine usable ACL payload size 2205 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2206 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2207 } 2208 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2209 break; 2210 #endif 2211 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2212 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2213 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2214 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2215 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); 2216 break; 2217 #endif 2218 #ifdef ENABLE_LE_CENTRAL 2219 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2220 hci_stack->le_whitelist_capacity = packet[6]; 2221 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2222 break; 2223 #endif 2224 case HCI_OPCODE_HCI_READ_BD_ADDR: 2225 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2226 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)); 2227 #ifdef ENABLE_CLASSIC 2228 if (hci_stack->link_key_db){ 2229 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2230 } 2231 #endif 2232 break; 2233 #ifdef ENABLE_CLASSIC 2234 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2235 hci_emit_discoverable_enabled(hci_stack->discoverable); 2236 break; 2237 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2238 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2239 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2240 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2241 hci_emit_event(event, sizeof(event), 1); 2242 } 2243 break; 2244 #endif 2245 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2246 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2247 2248 #ifdef ENABLE_CLASSIC 2249 // determine usable ACL packet types based on host buffer size and supported features 2250 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2251 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2252 #endif 2253 // Classic/LE 2254 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2255 break; 2256 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2257 manufacturer = little_endian_read_16(packet, 10); 2258 // map Cypress to Broadcom 2259 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2260 log_info("Treat Cypress as Broadcom"); 2261 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2262 little_endian_store_16(packet, 10, manufacturer); 2263 } 2264 hci_stack->manufacturer = manufacturer; 2265 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2266 break; 2267 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2268 hci_stack->local_supported_commands[0] = 2269 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2270 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2271 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2272 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2273 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2274 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2275 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2276 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2277 hci_stack->local_supported_commands[1] = 2278 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2279 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2280 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2281 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2282 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2283 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2284 break; 2285 #ifdef ENABLE_CLASSIC 2286 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2287 if (packet[5]) return; 2288 hci_stack->synchronous_flow_control_enabled = 1; 2289 break; 2290 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2291 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2292 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2293 conn = hci_connection_for_handle(handle); 2294 if (conn != NULL) { 2295 uint8_t key_size = 0; 2296 if (status == 0){ 2297 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2298 log_info("Handle %04x key Size: %u", handle, key_size); 2299 } else { 2300 key_size = 1; 2301 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2302 } 2303 hci_handle_read_encryption_key_size_complete(conn, key_size); 2304 } 2305 break; 2306 // assert pairing complete event is emitted. 2307 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2308 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2309 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2310 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2311 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2312 // lookup connection by gap pairing addr 2313 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2314 if (conn == NULL) break; 2315 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2316 break; 2317 2318 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2319 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2320 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2321 uint8_t event[67]; 2322 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2323 event[1] = 65; 2324 (void)memset(&event[2], 0, 65); 2325 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2326 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2327 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2328 event[2] = 3; 2329 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2330 } else { 2331 event[2] = 1; 2332 } 2333 } 2334 hci_emit_event(event, sizeof(event), 0); 2335 break; 2336 } 2337 2338 // note: only needed if user does not provide OOB data 2339 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2340 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2341 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2342 if (conn == NULL) break; 2343 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2344 break; 2345 #endif 2346 #endif 2347 default: 2348 break; 2349 } 2350 } 2351 2352 #ifdef ENABLE_BLE 2353 static void event_handle_le_connection_complete(const uint8_t * packet){ 2354 bd_addr_t addr; 2355 bd_addr_type_t addr_type; 2356 hci_connection_t * conn; 2357 2358 // Connection management 2359 reverse_bd_addr(&packet[8], addr); 2360 addr_type = (bd_addr_type_t)packet[7]; 2361 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2362 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2363 2364 #ifdef ENABLE_LE_CENTRAL 2365 // handle error: error is reported only to the initiator -> outgoing connection 2366 if (packet[3]){ 2367 2368 // handle cancelled outgoing connection 2369 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2370 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2371 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2372 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2373 // reset state 2374 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2375 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2376 // get outgoing connection conn struct for direct connect 2377 conn = gap_get_outgoing_connection(); 2378 } 2379 2380 // outgoing le connection establishment is done 2381 if (conn){ 2382 // remove entry 2383 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2384 btstack_memory_hci_connection_free( conn ); 2385 } 2386 return; 2387 } 2388 #endif 2389 2390 // on success, both hosts receive connection complete event 2391 if (packet[6] == HCI_ROLE_MASTER){ 2392 #ifdef ENABLE_LE_CENTRAL 2393 // if we're master on an le connection, it was an outgoing connection and we're done with it 2394 // note: no hci_connection_t object exists yet for connect with whitelist 2395 if (hci_is_le_connection_type(addr_type)){ 2396 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2397 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2398 } 2399 #endif 2400 } else { 2401 #ifdef ENABLE_LE_PERIPHERAL 2402 // if we're slave, it was an incoming connection, advertisements have stopped 2403 hci_stack->le_advertisements_active = false; 2404 #endif 2405 } 2406 2407 // LE connections are auto-accepted, so just create a connection if there isn't one already 2408 if (!conn){ 2409 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2410 } 2411 2412 // no memory, sorry. 2413 if (!conn){ 2414 return; 2415 } 2416 2417 conn->state = OPEN; 2418 conn->role = packet[6]; 2419 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2420 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2421 2422 #ifdef ENABLE_LE_PERIPHERAL 2423 if (packet[6] == HCI_ROLE_SLAVE){ 2424 hci_update_advertisements_enabled_for_current_roles(); 2425 } 2426 #endif 2427 2428 // init unenhanced att bearer mtu 2429 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2430 conn->att_connection.mtu_exchanged = false; 2431 2432 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2433 2434 // restart timer 2435 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2436 // btstack_run_loop_add_timer(&conn->timeout); 2437 2438 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2439 2440 hci_emit_nr_connections_changed(); 2441 } 2442 #endif 2443 2444 #ifdef ENABLE_CLASSIC 2445 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){ 2446 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2447 // LEVEL_4 is tested by l2cap 2448 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2449 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2450 if (level >= LEVEL_3){ 2451 // MITM not possible without keyboard or display 2452 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2453 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2454 2455 // MITM possible if one side has keyboard and the other has keyboard or display 2456 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2457 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2458 2459 // MITM not possible if one side has only display and other side has no keyboard 2460 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2461 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2462 } 2463 // LEVEL 2 requires SSP, which is a given 2464 return true; 2465 } 2466 2467 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2468 uint16_t i; 2469 for (i=0; i < size ; i++){ 2470 if (data[i] != 0) { 2471 return false; 2472 } 2473 } 2474 return true; 2475 } 2476 2477 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2478 // get requested security level 2479 gap_security_level_t requested_security_level = conn->requested_security_level; 2480 if (hci_stack->gap_secure_connections_only_mode){ 2481 requested_security_level = LEVEL_4; 2482 } 2483 2484 // assess security: LEVEL 4 requires SC 2485 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2486 if ((requested_security_level == LEVEL_4) && 2487 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2488 !hci_remote_sc_enabled(conn)){ 2489 log_info("Level 4 required, but SC not supported -> abort"); 2490 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2491 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2492 return; 2493 } 2494 2495 // assess security based on io capabilities 2496 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2497 // responder: fully validate io caps of both sides as well as OOB data 2498 bool security_possible = false; 2499 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2500 2501 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2502 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2503 // so we merge the OOB data availability 2504 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2505 if (conn->classic_oob_c_192 != NULL){ 2506 have_oob_data |= 1; 2507 } 2508 if (conn->classic_oob_c_256 != NULL){ 2509 have_oob_data |= 2; 2510 } 2511 // for up to Level 3, either P-192 as well as P-256 will do 2512 // 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 2513 // if remote does not SC, we should not receive P-256 data either 2514 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2515 security_possible = true; 2516 } 2517 // for Level 4, P-256 is needed 2518 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2519 security_possible = true; 2520 } 2521 #endif 2522 2523 if (security_possible == false){ 2524 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2525 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2526 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2527 return; 2528 } 2529 } else { 2530 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2531 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2532 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2533 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2534 log_info("Level 3+ required, but no input/output -> abort"); 2535 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2536 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2537 return; 2538 } 2539 #endif 2540 #endif 2541 } 2542 2543 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2544 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2545 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2546 } else { 2547 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2548 } 2549 #endif 2550 } 2551 2552 #endif 2553 2554 static void event_handler(uint8_t *packet, uint16_t size){ 2555 2556 uint16_t event_length = packet[1]; 2557 2558 // assert packet is complete 2559 if (size != (event_length + 2u)){ 2560 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2561 return; 2562 } 2563 2564 bd_addr_type_t addr_type; 2565 hci_con_handle_t handle; 2566 hci_connection_t * conn; 2567 int i; 2568 int create_connection_cmd; 2569 2570 #ifdef ENABLE_CLASSIC 2571 hci_link_type_t link_type; 2572 bd_addr_t addr; 2573 #endif 2574 2575 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2576 2577 switch (hci_event_packet_get_type(packet)) { 2578 2579 case HCI_EVENT_COMMAND_COMPLETE: 2580 handle_command_complete_event(packet, size); 2581 break; 2582 2583 case HCI_EVENT_COMMAND_STATUS: 2584 // get num cmd packets - limit to 1 to reduce complexity 2585 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2586 2587 // check command status to detected failed outgoing connections 2588 create_connection_cmd = 0; 2589 #ifdef ENABLE_CLASSIC 2590 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2591 create_connection_cmd = 1; 2592 } 2593 #endif 2594 #ifdef ENABLE_LE_CENTRAL 2595 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2596 create_connection_cmd = 1; 2597 } 2598 #endif 2599 if (create_connection_cmd) { 2600 uint8_t status = hci_event_command_status_get_status(packet); 2601 addr_type = hci_stack->outgoing_addr_type; 2602 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2603 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); 2604 2605 // reset outgoing address info 2606 memset(hci_stack->outgoing_addr, 0, 6); 2607 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2608 2609 // on error 2610 if (status != ERROR_CODE_SUCCESS){ 2611 #ifdef ENABLE_LE_CENTRAL 2612 if (hci_is_le_connection_type(addr_type)){ 2613 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2614 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2615 } 2616 #endif 2617 // error => outgoing connection failed 2618 if (conn != NULL){ 2619 hci_handle_connection_failed(conn, status); 2620 } 2621 } 2622 } 2623 2624 #ifdef ENABLE_CLASSIC 2625 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2626 uint8_t status = hci_event_command_status_get_status(packet); 2627 log_info("command status (inquiry), status %x", status); 2628 if (status == ERROR_CODE_SUCCESS) { 2629 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2630 } else { 2631 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2632 } 2633 } 2634 #endif 2635 break; 2636 2637 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2638 if (size < 3) return; 2639 uint16_t num_handles = packet[2]; 2640 if (size != (3u + num_handles * 4u)) return; 2641 uint16_t offset = 3; 2642 for (i=0; i<num_handles;i++){ 2643 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2644 offset += 2u; 2645 uint16_t num_packets = little_endian_read_16(packet, offset); 2646 offset += 2u; 2647 2648 conn = hci_connection_for_handle(handle); 2649 if (!conn){ 2650 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2651 continue; 2652 } 2653 2654 if (conn->num_packets_sent >= num_packets){ 2655 conn->num_packets_sent -= num_packets; 2656 } else { 2657 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2658 conn->num_packets_sent = 0; 2659 } 2660 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2661 2662 #ifdef ENABLE_CLASSIC 2663 // For SCO, we do the can_send_now_check here 2664 hci_notify_if_sco_can_send_now(); 2665 #endif 2666 } 2667 break; 2668 } 2669 2670 #ifdef ENABLE_CLASSIC 2671 case HCI_EVENT_INQUIRY_COMPLETE: 2672 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2673 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2674 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2675 hci_emit_event(event, sizeof(event), 1); 2676 } 2677 break; 2678 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2679 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2680 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2681 } 2682 break; 2683 case HCI_EVENT_CONNECTION_REQUEST: 2684 reverse_bd_addr(&packet[2], addr); 2685 link_type = (hci_link_type_t) packet[11]; 2686 2687 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2688 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2689 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2690 bd_addr_copy(hci_stack->decline_addr, addr); 2691 break; 2692 } 2693 2694 if (hci_stack->gap_classic_accept_callback != NULL){ 2695 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2696 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2697 bd_addr_copy(hci_stack->decline_addr, addr); 2698 break; 2699 } 2700 } 2701 2702 // TODO: eval COD 8-10 2703 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2704 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2705 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2706 if (!conn) { 2707 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2708 } 2709 if (!conn) { 2710 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2711 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2712 bd_addr_copy(hci_stack->decline_addr, addr); 2713 break; 2714 } 2715 conn->role = HCI_ROLE_SLAVE; 2716 conn->state = RECEIVED_CONNECTION_REQUEST; 2717 // store info about eSCO 2718 if (link_type == HCI_LINK_TYPE_ESCO){ 2719 conn->remote_supported_features[0] |= 1; 2720 } 2721 hci_run(); 2722 break; 2723 2724 case HCI_EVENT_CONNECTION_COMPLETE: 2725 // Connection management 2726 reverse_bd_addr(&packet[5], addr); 2727 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2728 addr_type = BD_ADDR_TYPE_ACL; 2729 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2730 if (conn) { 2731 if (!packet[2]){ 2732 conn->state = OPEN; 2733 conn->con_handle = little_endian_read_16(packet, 3); 2734 2735 // queue set supervision timeout if we're master 2736 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2737 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2738 } 2739 2740 // restart timer 2741 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2742 btstack_run_loop_add_timer(&conn->timeout); 2743 2744 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2745 2746 hci_emit_nr_connections_changed(); 2747 } else { 2748 // connection failed 2749 hci_handle_connection_failed(conn, packet[2]); 2750 } 2751 } 2752 break; 2753 2754 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2755 reverse_bd_addr(&packet[5], addr); 2756 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2757 if (packet[2]){ 2758 // connection failed 2759 break; 2760 } 2761 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2762 if (!conn) { 2763 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2764 } 2765 if (!conn) { 2766 break; 2767 } 2768 conn->state = OPEN; 2769 conn->con_handle = little_endian_read_16(packet, 3); 2770 2771 #ifdef ENABLE_SCO_OVER_HCI 2772 // update SCO 2773 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2774 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2775 } 2776 // trigger can send now 2777 if (hci_have_usb_transport()){ 2778 hci_stack->sco_can_send_now = true; 2779 } 2780 #endif 2781 #ifdef HAVE_SCO_TRANSPORT 2782 // configure sco transport 2783 if (hci_stack->sco_transport != NULL){ 2784 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2785 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2786 } 2787 #endif 2788 break; 2789 2790 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2791 handle = little_endian_read_16(packet, 3); 2792 conn = hci_connection_for_handle(handle); 2793 if (!conn) break; 2794 if (!packet[2]){ 2795 const uint8_t * features = &packet[5]; 2796 hci_handle_remote_features_page_0(conn, features); 2797 2798 // read extended features if possible 2799 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2800 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2801 break; 2802 } 2803 } 2804 hci_handle_remote_features_received(conn); 2805 break; 2806 2807 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2808 handle = little_endian_read_16(packet, 3); 2809 conn = hci_connection_for_handle(handle); 2810 if (!conn) break; 2811 // status = ok, page = 1 2812 if (!packet[2]) { 2813 uint8_t page_number = packet[5]; 2814 uint8_t maximum_page_number = packet[6]; 2815 const uint8_t * features = &packet[7]; 2816 bool done = false; 2817 switch (page_number){ 2818 case 1: 2819 hci_handle_remote_features_page_1(conn, features); 2820 if (maximum_page_number >= 2){ 2821 // get Secure Connections (Controller) from Page 2 if available 2822 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2823 } else { 2824 // otherwise, assume SC (Controller) == SC (Host) 2825 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2826 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2827 } 2828 done = true; 2829 } 2830 break; 2831 case 2: 2832 hci_handle_remote_features_page_2(conn, features); 2833 done = true; 2834 break; 2835 default: 2836 break; 2837 } 2838 if (!done) break; 2839 } 2840 hci_handle_remote_features_received(conn); 2841 break; 2842 2843 case HCI_EVENT_LINK_KEY_REQUEST: 2844 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2845 hci_event_link_key_request_get_bd_addr(packet, addr); 2846 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2847 if (!conn) break; 2848 2849 // lookup link key in db if not cached 2850 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2851 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2852 } 2853 2854 // response sent by hci_run() 2855 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2856 #endif 2857 break; 2858 2859 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2860 hci_event_link_key_request_get_bd_addr(packet, addr); 2861 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2862 if (!conn) break; 2863 2864 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2865 2866 // CVE-2020-26555: ignore NULL link key 2867 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2868 if (btstack_is_null(&packet[8], 16)) break; 2869 2870 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2871 // Change Connection Encryption keeps link key type 2872 if (link_key_type != CHANGED_COMBINATION_KEY){ 2873 conn->link_key_type = link_key_type; 2874 } 2875 2876 // cache link key. link keys stored in little-endian format for legacy reasons 2877 memcpy(&conn->link_key, &packet[8], 16); 2878 2879 // only store link key: 2880 // - if bondable enabled 2881 if (hci_stack->bondable == false) break; 2882 // - if security level sufficient 2883 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2884 // - for SSP, also check if remote side requested bonding as well 2885 if (conn->link_key_type != COMBINATION_KEY){ 2886 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2887 if (!remote_bonding){ 2888 break; 2889 } 2890 } 2891 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2892 break; 2893 } 2894 2895 case HCI_EVENT_PIN_CODE_REQUEST: 2896 hci_event_pin_code_request_get_bd_addr(packet, addr); 2897 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2898 if (!conn) break; 2899 2900 hci_pairing_started(conn, false); 2901 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2902 if (!hci_stack->bondable ){ 2903 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2904 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2905 hci_run(); 2906 return; 2907 } 2908 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2909 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2910 log_info("Level 4 required, but SC not supported -> abort"); 2911 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2912 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2913 hci_run(); 2914 return; 2915 } 2916 break; 2917 2918 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2919 hci_event_io_capability_response_get_bd_addr(packet, addr); 2920 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2921 if (!conn) break; 2922 2923 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2924 hci_pairing_started(conn, true); 2925 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2926 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2927 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2928 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2929 #endif 2930 break; 2931 2932 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2933 hci_event_io_capability_response_get_bd_addr(packet, addr); 2934 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2935 if (!conn) break; 2936 2937 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2938 hci_connection_timestamp(conn); 2939 hci_pairing_started(conn, true); 2940 break; 2941 2942 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2943 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2944 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2945 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2946 if (!conn) break; 2947 2948 hci_connection_timestamp(conn); 2949 2950 hci_pairing_started(conn, true); 2951 2952 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2953 break; 2954 #endif 2955 2956 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2957 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2958 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2959 if (!conn) break; 2960 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2961 if (hci_stack->ssp_auto_accept){ 2962 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2963 }; 2964 } else { 2965 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2966 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2967 // don't forward event to app 2968 hci_run(); 2969 return; 2970 } 2971 break; 2972 2973 case HCI_EVENT_USER_PASSKEY_REQUEST: 2974 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2975 if (hci_stack->ssp_auto_accept){ 2976 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2977 }; 2978 break; 2979 2980 case HCI_EVENT_MODE_CHANGE: 2981 handle = hci_event_mode_change_get_handle(packet); 2982 conn = hci_connection_for_handle(handle); 2983 if (!conn) break; 2984 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2985 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2986 break; 2987 #endif 2988 2989 case HCI_EVENT_ENCRYPTION_CHANGE: 2990 handle = hci_event_encryption_change_get_connection_handle(packet); 2991 conn = hci_connection_for_handle(handle); 2992 if (!conn) break; 2993 if (hci_event_encryption_change_get_status(packet) == 0u) { 2994 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2995 if (encryption_enabled){ 2996 if (hci_is_le_connection(conn)){ 2997 // For LE, we accept connection as encrypted 2998 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2999 } 3000 #ifdef ENABLE_CLASSIC 3001 else { 3002 3003 // dedicated bonding: send result and disconnect 3004 if (conn->bonding_flags & BONDING_DEDICATED){ 3005 conn->bonding_flags &= ~BONDING_DEDICATED; 3006 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3007 conn->bonding_status = packet[2]; 3008 break; 3009 } 3010 3011 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3012 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3013 bool connected_uses_aes_ccm = encryption_enabled == 2; 3014 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3015 log_info("SC during pairing, but only E0 now -> abort"); 3016 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3017 break; 3018 } 3019 3020 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3021 if (connected_uses_aes_ccm){ 3022 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3023 } 3024 3025 #ifdef ENABLE_TESTING_SUPPORT 3026 // work around for issue with PTS dongle 3027 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3028 #endif 3029 3030 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3031 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3032 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3033 } else { 3034 // if not, pretend everything is perfect 3035 hci_handle_read_encryption_key_size_complete(conn, 16); 3036 } 3037 } 3038 #endif 3039 } else { 3040 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3041 } 3042 } 3043 3044 break; 3045 3046 #ifdef ENABLE_CLASSIC 3047 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3048 handle = hci_event_authentication_complete_get_connection_handle(packet); 3049 conn = hci_connection_for_handle(handle); 3050 if (!conn) break; 3051 3052 // clear authentication active flag 3053 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3054 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3055 3056 // authenticated only if auth status == 0 3057 if (hci_event_authentication_complete_get_status(packet) == 0){ 3058 // authenticated 3059 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3060 3061 // If not already encrypted, start encryption 3062 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3063 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3064 break; 3065 } 3066 } 3067 3068 // emit updated security level 3069 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3070 break; 3071 3072 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3073 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3074 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3075 if (!conn) break; 3076 3077 // treat successfully paired connection as authenticated 3078 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3079 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3080 } 3081 3082 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3083 break; 3084 #endif 3085 3086 // HCI_EVENT_DISCONNECTION_COMPLETE 3087 // has been split, to first notify stack before shutting connection down 3088 // see end of function, too. 3089 case HCI_EVENT_DISCONNECTION_COMPLETE: 3090 if (packet[2]) break; // status != 0 3091 handle = little_endian_read_16(packet, 3); 3092 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3093 if (hci_stack->acl_fragmentation_total_size > 0u) { 3094 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3095 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3096 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3097 hci_stack->acl_fragmentation_total_size = 0; 3098 hci_stack->acl_fragmentation_pos = 0; 3099 if (release_buffer){ 3100 hci_release_packet_buffer(); 3101 } 3102 } 3103 } 3104 3105 conn = hci_connection_for_handle(handle); 3106 if (!conn) break; 3107 #ifdef ENABLE_CLASSIC 3108 // pairing failed if it was ongoing 3109 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3110 #endif 3111 3112 // emit dedicatd bonding event 3113 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3114 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3115 } 3116 3117 // mark connection for shutdown, stop timers, reset state 3118 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3119 hci_connection_stop_timer(conn); 3120 hci_connection_init(conn); 3121 3122 #ifdef ENABLE_BLE 3123 #ifdef ENABLE_LE_PERIPHERAL 3124 // re-enable advertisements for le connections if active 3125 if (hci_is_le_connection(conn)){ 3126 hci_update_advertisements_enabled_for_current_roles(); 3127 } 3128 #endif 3129 #endif 3130 break; 3131 3132 case HCI_EVENT_HARDWARE_ERROR: 3133 log_error("Hardware Error: 0x%02x", packet[2]); 3134 if (hci_stack->hardware_error_callback){ 3135 (*hci_stack->hardware_error_callback)(packet[2]); 3136 } else { 3137 // if no special requests, just reboot stack 3138 hci_power_control_off(); 3139 hci_power_control_on(); 3140 } 3141 break; 3142 3143 #ifdef ENABLE_CLASSIC 3144 case HCI_EVENT_ROLE_CHANGE: 3145 if (packet[2]) break; // status != 0 3146 reverse_bd_addr(&packet[3], addr); 3147 addr_type = BD_ADDR_TYPE_ACL; 3148 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3149 if (!conn) break; 3150 conn->role = packet[9]; 3151 break; 3152 #endif 3153 3154 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3155 // release packet buffer only for asynchronous transport and if there are not further fragements 3156 if (hci_transport_synchronous()) { 3157 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3158 return; // instead of break: to avoid re-entering hci_run() 3159 } 3160 hci_stack->acl_fragmentation_tx_active = 0; 3161 if (hci_stack->acl_fragmentation_total_size) break; 3162 hci_release_packet_buffer(); 3163 3164 // L2CAP receives this event via the hci_emit_event below 3165 3166 #ifdef ENABLE_CLASSIC 3167 // For SCO, we do the can_send_now_check here 3168 hci_notify_if_sco_can_send_now(); 3169 #endif 3170 break; 3171 3172 #ifdef ENABLE_CLASSIC 3173 case HCI_EVENT_SCO_CAN_SEND_NOW: 3174 // For SCO, we do the can_send_now_check here 3175 hci_stack->sco_can_send_now = true; 3176 hci_notify_if_sco_can_send_now(); 3177 return; 3178 3179 // explode inquriy results for easier consumption 3180 case HCI_EVENT_INQUIRY_RESULT: 3181 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3182 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3183 gap_inquiry_explode(packet, size); 3184 break; 3185 #endif 3186 3187 #ifdef ENABLE_BLE 3188 case HCI_EVENT_LE_META: 3189 switch (packet[2]){ 3190 #ifdef ENABLE_LE_CENTRAL 3191 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3192 // log_info("advertising report received"); 3193 if (!hci_stack->le_scanning_enabled) break; 3194 le_handle_advertisement_report(packet, size); 3195 break; 3196 #endif 3197 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3198 event_handle_le_connection_complete(packet); 3199 break; 3200 3201 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3202 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3203 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3204 conn = hci_connection_for_handle(handle); 3205 if (!conn) break; 3206 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3207 break; 3208 3209 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3210 // connection 3211 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3212 conn = hci_connection_for_handle(handle); 3213 if (conn) { 3214 // read arguments 3215 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3216 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3217 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3218 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3219 3220 // validate against current connection parameter range 3221 le_connection_parameter_range_t existing_range; 3222 gap_get_connection_parameter_range(&existing_range); 3223 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3224 if (update_parameter){ 3225 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3226 conn->le_conn_interval_min = le_conn_interval_min; 3227 conn->le_conn_interval_max = le_conn_interval_max; 3228 conn->le_conn_latency = le_conn_latency; 3229 conn->le_supervision_timeout = le_supervision_timeout; 3230 } else { 3231 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3232 } 3233 } 3234 break; 3235 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3236 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3237 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3238 conn = hci_connection_for_handle(handle); 3239 if (conn) { 3240 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3241 } 3242 break; 3243 #endif 3244 default: 3245 break; 3246 } 3247 break; 3248 #endif 3249 case HCI_EVENT_VENDOR_SPECIFIC: 3250 // Vendor specific commands often create vendor specific event instead of num completed packets 3251 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3252 switch (hci_stack->manufacturer){ 3253 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3254 hci_stack->num_cmd_packets = 1; 3255 break; 3256 default: 3257 break; 3258 } 3259 break; 3260 default: 3261 break; 3262 } 3263 3264 handle_event_for_current_stack_state(packet, size); 3265 3266 // notify upper stack 3267 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3268 3269 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3270 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3271 handle = little_endian_read_16(packet, 3); 3272 hci_connection_t * aConn = hci_connection_for_handle(handle); 3273 // discard connection if app did not trigger a reconnect in the event handler 3274 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3275 hci_shutdown_connection(aConn); 3276 } 3277 } 3278 3279 // execute main loop 3280 hci_run(); 3281 } 3282 3283 #ifdef ENABLE_CLASSIC 3284 3285 #ifdef ENABLE_SCO_OVER_HCI 3286 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3287 static void sco_schedule_tx(hci_connection_t * conn); 3288 3289 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3290 log_debug("SCO TX Timeout"); 3291 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3292 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3293 if (!conn) return; 3294 3295 // trigger send 3296 conn->sco_tx_ready = 1; 3297 // extra packet if CVSD but SCO buffer is too short 3298 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3299 conn->sco_tx_ready++; 3300 } 3301 hci_notify_if_sco_can_send_now(); 3302 } 3303 3304 3305 #define SCO_TX_AFTER_RX_MS (6) 3306 3307 static void sco_schedule_tx(hci_connection_t * conn){ 3308 3309 uint32_t now = btstack_run_loop_get_time_ms(); 3310 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3311 int time_delta_ms = sco_tx_ms - now; 3312 3313 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3314 3315 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3316 btstack_run_loop_remove_timer(timer); 3317 btstack_run_loop_set_timer(timer, time_delta_ms); 3318 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3319 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3320 btstack_run_loop_add_timer(timer); 3321 } 3322 #endif 3323 3324 static void sco_handler(uint8_t * packet, uint16_t size){ 3325 // lookup connection struct 3326 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3327 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3328 if (!conn) return; 3329 3330 #ifdef ENABLE_SCO_OVER_HCI 3331 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3332 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3333 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3334 packet[2] = 0x3c; 3335 memmove(&packet[3], &packet[23], 63); 3336 size = 63; 3337 } 3338 } 3339 3340 if (hci_have_usb_transport()){ 3341 // Nothing to do 3342 } else { 3343 // 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); 3344 if (hci_stack->synchronous_flow_control_enabled == 0){ 3345 uint32_t now = btstack_run_loop_get_time_ms(); 3346 3347 if (!conn->sco_rx_valid){ 3348 // ignore first 10 packets 3349 conn->sco_rx_count++; 3350 // log_debug("sco rx count %u", conn->sco_rx_count); 3351 if (conn->sco_rx_count == 10) { 3352 // use first timestamp as is and pretent it just started 3353 conn->sco_rx_ms = now; 3354 conn->sco_rx_valid = 1; 3355 conn->sco_rx_count = 0; 3356 sco_schedule_tx(conn); 3357 } 3358 } else { 3359 // track expected arrival timme 3360 conn->sco_rx_count++; 3361 conn->sco_rx_ms += 7; 3362 int delta = (int32_t) (now - conn->sco_rx_ms); 3363 if (delta > 0){ 3364 conn->sco_rx_ms++; 3365 } 3366 // log_debug("sco rx %u", conn->sco_rx_ms); 3367 sco_schedule_tx(conn); 3368 } 3369 } 3370 } 3371 #endif 3372 3373 // deliver to app 3374 if (hci_stack->sco_packet_handler) { 3375 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3376 } 3377 3378 #ifdef HAVE_SCO_TRANSPORT 3379 // We can send one packet for each received packet 3380 conn->sco_tx_ready++; 3381 hci_notify_if_sco_can_send_now(); 3382 #endif 3383 3384 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3385 conn->num_packets_completed++; 3386 hci_stack->host_completed_packets = 1; 3387 hci_run(); 3388 #endif 3389 } 3390 #endif 3391 3392 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3393 hci_dump_packet(packet_type, 1, packet, size); 3394 switch (packet_type) { 3395 case HCI_EVENT_PACKET: 3396 event_handler(packet, size); 3397 break; 3398 case HCI_ACL_DATA_PACKET: 3399 acl_handler(packet, size); 3400 break; 3401 #ifdef ENABLE_CLASSIC 3402 case HCI_SCO_DATA_PACKET: 3403 sco_handler(packet, size); 3404 break; 3405 #endif 3406 default: 3407 break; 3408 } 3409 } 3410 3411 /** 3412 * @brief Add event packet handler. 3413 */ 3414 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3415 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3416 } 3417 3418 /** 3419 * @brief Remove event packet handler. 3420 */ 3421 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3422 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3423 } 3424 3425 /** Register HCI packet handlers */ 3426 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3427 hci_stack->acl_packet_handler = handler; 3428 } 3429 3430 #ifdef ENABLE_CLASSIC 3431 /** 3432 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3433 */ 3434 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3435 hci_stack->sco_packet_handler = handler; 3436 } 3437 #endif 3438 3439 static void hci_state_reset(void){ 3440 // no connections yet 3441 hci_stack->connections = NULL; 3442 3443 // keep discoverable/connectable as this has been requested by the client(s) 3444 // hci_stack->discoverable = 0; 3445 // hci_stack->connectable = 0; 3446 // hci_stack->bondable = 1; 3447 // hci_stack->own_addr_type = 0; 3448 3449 // buffer is free 3450 hci_stack->hci_packet_buffer_reserved = false; 3451 3452 // no pending cmds 3453 hci_stack->decline_reason = 0; 3454 3455 hci_stack->secure_connections_active = false; 3456 3457 #ifdef ENABLE_CLASSIC 3458 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3459 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3460 3461 hci_stack->gap_tasks = 3462 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3463 GAP_TASK_SET_CLASS_OF_DEVICE | 3464 GAP_TASK_SET_LOCAL_NAME | 3465 GAP_TASK_SET_EIR_DATA | 3466 GAP_TASK_WRITE_SCAN_ENABLE | 3467 GAP_TASK_WRITE_PAGE_TIMEOUT; 3468 #endif 3469 3470 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3471 hci_stack->classic_read_local_oob_data = false; 3472 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3473 #endif 3474 3475 // LE 3476 #ifdef ENABLE_BLE 3477 memset(hci_stack->le_random_address, 0, 6); 3478 hci_stack->le_random_address_set = 0; 3479 #endif 3480 #ifdef ENABLE_LE_CENTRAL 3481 hci_stack->le_scanning_active = false; 3482 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3483 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3484 hci_stack->le_whitelist_capacity = 0; 3485 #endif 3486 #ifdef ENABLE_LE_PERIPHERAL 3487 hci_stack->le_advertisements_active = false; 3488 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3489 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3490 } 3491 if (hci_stack->le_advertisements_data != NULL){ 3492 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3493 } 3494 #endif 3495 } 3496 3497 #ifdef ENABLE_CLASSIC 3498 /** 3499 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3500 */ 3501 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3502 // store and open remote device db 3503 hci_stack->link_key_db = link_key_db; 3504 if (hci_stack->link_key_db) { 3505 hci_stack->link_key_db->open(); 3506 } 3507 } 3508 #endif 3509 3510 void hci_init(const hci_transport_t *transport, const void *config){ 3511 3512 #ifdef HAVE_MALLOC 3513 if (!hci_stack) { 3514 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3515 } 3516 #else 3517 hci_stack = &hci_stack_static; 3518 #endif 3519 memset(hci_stack, 0, sizeof(hci_stack_t)); 3520 3521 // reference to use transport layer implementation 3522 hci_stack->hci_transport = transport; 3523 3524 // reference to used config 3525 hci_stack->config = config; 3526 3527 // setup pointer for outgoing packet buffer 3528 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3529 3530 // max acl payload size defined in config.h 3531 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3532 3533 // register packet handlers with transport 3534 transport->register_packet_handler(&packet_handler); 3535 3536 hci_stack->state = HCI_STATE_OFF; 3537 3538 // class of device 3539 hci_stack->class_of_device = 0x007a020c; // Smartphone 3540 3541 // bondable by default 3542 hci_stack->bondable = 1; 3543 3544 #ifdef ENABLE_CLASSIC 3545 // classic name 3546 hci_stack->local_name = default_classic_name; 3547 3548 // Master slave policy 3549 hci_stack->master_slave_policy = 1; 3550 3551 // Allow Role Switch 3552 hci_stack->allow_role_switch = 1; 3553 3554 // Default / minimum security level = 2 3555 hci_stack->gap_security_level = LEVEL_2; 3556 3557 // Default Security Mode 4 3558 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3559 3560 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3561 hci_stack->gap_required_encyrption_key_size = 7; 3562 3563 // Link Supervision Timeout 3564 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3565 3566 #endif 3567 3568 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3569 hci_stack->ssp_enable = 1; 3570 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3571 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3572 hci_stack->ssp_auto_accept = 1; 3573 3574 // Secure Connections: enable (requires support from Controller) 3575 hci_stack->secure_connections_enable = true; 3576 3577 // voice setting - signed 16 bit pcm data with CVSD over the air 3578 hci_stack->sco_voice_setting = 0x60; 3579 3580 #ifdef ENABLE_LE_CENTRAL 3581 // connection parameter to use for outgoing connections 3582 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3583 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3584 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3585 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3586 hci_stack->le_connection_latency = 4; // 4 3587 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3588 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3589 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3590 3591 // default LE Scanning 3592 hci_stack->le_scan_type = 0x1; // active 3593 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3594 hci_stack->le_scan_window = 0x30; // 30 ms 3595 #endif 3596 3597 #ifdef ENABLE_LE_PERIPHERAL 3598 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3599 #endif 3600 3601 // connection parameter range used to answer connection parameter update requests in l2cap 3602 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3603 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3604 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3605 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3606 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3607 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3608 3609 hci_state_reset(); 3610 } 3611 3612 void hci_deinit(void){ 3613 #ifdef HAVE_MALLOC 3614 if (hci_stack) { 3615 free(hci_stack); 3616 } 3617 #endif 3618 hci_stack = NULL; 3619 3620 #ifdef ENABLE_CLASSIC 3621 disable_l2cap_timeouts = 0; 3622 #endif 3623 } 3624 3625 /** 3626 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3627 */ 3628 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3629 hci_stack->chipset = chipset_driver; 3630 3631 // reset chipset driver - init is also called on power_up 3632 if (hci_stack->chipset && hci_stack->chipset->init){ 3633 hci_stack->chipset->init(hci_stack->config); 3634 } 3635 } 3636 3637 /** 3638 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3639 */ 3640 void hci_set_control(const btstack_control_t *hardware_control){ 3641 // references to used control implementation 3642 hci_stack->control = hardware_control; 3643 // init with transport config 3644 hardware_control->init(hci_stack->config); 3645 } 3646 3647 static void hci_discard_connections(void){ 3648 btstack_linked_list_iterator_t lit; 3649 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3650 while (btstack_linked_list_iterator_has_next(&lit)){ 3651 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3652 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3653 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3654 hci_shutdown_connection(connection); 3655 } 3656 } 3657 3658 void hci_close(void){ 3659 3660 #ifdef ENABLE_CLASSIC 3661 // close remote device db 3662 if (hci_stack->link_key_db) { 3663 hci_stack->link_key_db->close(); 3664 } 3665 #endif 3666 3667 hci_discard_connections(); 3668 3669 hci_power_control(HCI_POWER_OFF); 3670 3671 #ifdef HAVE_MALLOC 3672 free(hci_stack); 3673 #endif 3674 hci_stack = NULL; 3675 } 3676 3677 #ifdef HAVE_SCO_TRANSPORT 3678 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3679 hci_stack->sco_transport = sco_transport; 3680 sco_transport->register_packet_handler(&packet_handler); 3681 } 3682 #endif 3683 3684 #ifdef ENABLE_CLASSIC 3685 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3686 // validate ranage and set 3687 if (encryption_key_size < 7) return; 3688 if (encryption_key_size > 16) return; 3689 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3690 } 3691 3692 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3693 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3694 hci_stack->gap_security_mode = security_mode; 3695 return ERROR_CODE_SUCCESS; 3696 } else { 3697 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3698 } 3699 } 3700 3701 gap_security_mode_t gap_get_security_mode(void){ 3702 return hci_stack->gap_security_mode; 3703 } 3704 3705 void gap_set_security_level(gap_security_level_t security_level){ 3706 hci_stack->gap_security_level = security_level; 3707 } 3708 3709 gap_security_level_t gap_get_security_level(void){ 3710 if (hci_stack->gap_secure_connections_only_mode){ 3711 return LEVEL_4; 3712 } 3713 return hci_stack->gap_security_level; 3714 } 3715 3716 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3717 hci_stack->gap_minimal_service_security_level = security_level; 3718 } 3719 3720 void gap_set_secure_connections_only_mode(bool enable){ 3721 hci_stack->gap_secure_connections_only_mode = enable; 3722 } 3723 3724 bool gap_get_secure_connections_only_mode(void){ 3725 return hci_stack->gap_secure_connections_only_mode; 3726 } 3727 #endif 3728 3729 #ifdef ENABLE_CLASSIC 3730 void gap_set_class_of_device(uint32_t class_of_device){ 3731 hci_stack->class_of_device = class_of_device; 3732 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3733 hci_run(); 3734 } 3735 3736 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3737 hci_stack->default_link_policy_settings = default_link_policy_settings; 3738 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3739 hci_run(); 3740 } 3741 3742 void gap_set_allow_role_switch(bool allow_role_switch){ 3743 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3744 } 3745 3746 uint8_t hci_get_allow_role_switch(void){ 3747 return hci_stack->allow_role_switch; 3748 } 3749 3750 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3751 hci_stack->link_supervision_timeout = link_supervision_timeout; 3752 } 3753 3754 void hci_disable_l2cap_timeout_check(void){ 3755 disable_l2cap_timeouts = 1; 3756 } 3757 #endif 3758 3759 #ifndef HAVE_HOST_CONTROLLER_API 3760 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3761 void hci_set_bd_addr(bd_addr_t addr){ 3762 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3763 hci_stack->custom_bd_addr_set = 1; 3764 } 3765 #endif 3766 3767 // State-Module-Driver overview 3768 // state module low-level 3769 // HCI_STATE_OFF off close 3770 // HCI_STATE_INITIALIZING, on open 3771 // HCI_STATE_WORKING, on open 3772 // HCI_STATE_HALTING, on open 3773 // HCI_STATE_SLEEPING, off/sleep close 3774 // HCI_STATE_FALLING_ASLEEP on open 3775 3776 static int hci_power_control_on(void){ 3777 3778 // power on 3779 int err = 0; 3780 if (hci_stack->control && hci_stack->control->on){ 3781 err = (*hci_stack->control->on)(); 3782 } 3783 if (err){ 3784 log_error( "POWER_ON failed"); 3785 hci_emit_hci_open_failed(); 3786 return err; 3787 } 3788 3789 // int chipset driver 3790 if (hci_stack->chipset && hci_stack->chipset->init){ 3791 hci_stack->chipset->init(hci_stack->config); 3792 } 3793 3794 // init transport 3795 if (hci_stack->hci_transport->init){ 3796 hci_stack->hci_transport->init(hci_stack->config); 3797 } 3798 3799 // open transport 3800 err = hci_stack->hci_transport->open(); 3801 if (err){ 3802 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3803 if (hci_stack->control && hci_stack->control->off){ 3804 (*hci_stack->control->off)(); 3805 } 3806 hci_emit_hci_open_failed(); 3807 return err; 3808 } 3809 return 0; 3810 } 3811 3812 static void hci_power_control_off(void){ 3813 3814 log_info("hci_power_control_off"); 3815 3816 // close low-level device 3817 hci_stack->hci_transport->close(); 3818 3819 log_info("hci_power_control_off - hci_transport closed"); 3820 3821 // power off 3822 if (hci_stack->control && hci_stack->control->off){ 3823 (*hci_stack->control->off)(); 3824 } 3825 3826 log_info("hci_power_control_off - control closed"); 3827 3828 hci_stack->state = HCI_STATE_OFF; 3829 } 3830 3831 static void hci_power_control_sleep(void){ 3832 3833 log_info("hci_power_control_sleep"); 3834 3835 #if 0 3836 // don't close serial port during sleep 3837 3838 // close low-level device 3839 hci_stack->hci_transport->close(hci_stack->config); 3840 #endif 3841 3842 // sleep mode 3843 if (hci_stack->control && hci_stack->control->sleep){ 3844 (*hci_stack->control->sleep)(); 3845 } 3846 3847 hci_stack->state = HCI_STATE_SLEEPING; 3848 } 3849 3850 static int hci_power_control_wake(void){ 3851 3852 log_info("hci_power_control_wake"); 3853 3854 // wake on 3855 if (hci_stack->control && hci_stack->control->wake){ 3856 (*hci_stack->control->wake)(); 3857 } 3858 3859 #if 0 3860 // open low-level device 3861 int err = hci_stack->hci_transport->open(hci_stack->config); 3862 if (err){ 3863 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3864 if (hci_stack->control && hci_stack->control->off){ 3865 (*hci_stack->control->off)(); 3866 } 3867 hci_emit_hci_open_failed(); 3868 return err; 3869 } 3870 #endif 3871 3872 return 0; 3873 } 3874 3875 static void hci_power_transition_to_initializing(void){ 3876 // set up state machine 3877 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3878 hci_stack->hci_packet_buffer_reserved = false; 3879 hci_stack->state = HCI_STATE_INITIALIZING; 3880 hci_stack->substate = HCI_INIT_SEND_RESET; 3881 } 3882 3883 // returns error 3884 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3885 int err; 3886 switch (power_mode){ 3887 case HCI_POWER_ON: 3888 err = hci_power_control_on(); 3889 if (err != 0) { 3890 log_error("hci_power_control_on() error %d", err); 3891 return err; 3892 } 3893 hci_power_transition_to_initializing(); 3894 break; 3895 case HCI_POWER_OFF: 3896 // do nothing 3897 break; 3898 case HCI_POWER_SLEEP: 3899 // do nothing (with SLEEP == OFF) 3900 break; 3901 default: 3902 btstack_assert(false); 3903 break; 3904 } 3905 return ERROR_CODE_SUCCESS; 3906 } 3907 3908 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3909 switch (power_mode){ 3910 case HCI_POWER_ON: 3911 // do nothing 3912 break; 3913 case HCI_POWER_OFF: 3914 // no connections yet, just turn it off 3915 hci_power_control_off(); 3916 break; 3917 case HCI_POWER_SLEEP: 3918 // no connections yet, just turn it off 3919 hci_power_control_sleep(); 3920 break; 3921 default: 3922 btstack_assert(false); 3923 break; 3924 } 3925 return ERROR_CODE_SUCCESS; 3926 } 3927 3928 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3929 switch (power_mode){ 3930 case HCI_POWER_ON: 3931 // do nothing 3932 break; 3933 case HCI_POWER_OFF: 3934 // see hci_run 3935 hci_stack->state = HCI_STATE_HALTING; 3936 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3937 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 3938 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 3939 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3940 btstack_run_loop_add_timer(&hci_stack->timeout); 3941 break; 3942 case HCI_POWER_SLEEP: 3943 // see hci_run 3944 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3945 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3946 break; 3947 default: 3948 btstack_assert(false); 3949 break; 3950 } 3951 return ERROR_CODE_SUCCESS; 3952 } 3953 3954 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3955 switch (power_mode){ 3956 case HCI_POWER_ON: 3957 hci_power_transition_to_initializing(); 3958 break; 3959 case HCI_POWER_OFF: 3960 // do nothing 3961 break; 3962 case HCI_POWER_SLEEP: 3963 // see hci_run 3964 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3965 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3966 break; 3967 default: 3968 btstack_assert(false); 3969 break; 3970 } 3971 return ERROR_CODE_SUCCESS; 3972 } 3973 3974 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3975 switch (power_mode){ 3976 case HCI_POWER_ON: 3977 hci_power_transition_to_initializing(); 3978 break; 3979 case HCI_POWER_OFF: 3980 // see hci_run 3981 hci_stack->state = HCI_STATE_HALTING; 3982 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3983 break; 3984 case HCI_POWER_SLEEP: 3985 // do nothing 3986 break; 3987 default: 3988 btstack_assert(false); 3989 break; 3990 } 3991 return ERROR_CODE_SUCCESS; 3992 } 3993 3994 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3995 int err; 3996 switch (power_mode){ 3997 case HCI_POWER_ON: 3998 err = hci_power_control_wake(); 3999 if (err) return err; 4000 hci_power_transition_to_initializing(); 4001 break; 4002 case HCI_POWER_OFF: 4003 hci_stack->state = HCI_STATE_HALTING; 4004 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4005 break; 4006 case HCI_POWER_SLEEP: 4007 // do nothing 4008 break; 4009 default: 4010 btstack_assert(false); 4011 break; 4012 } 4013 return ERROR_CODE_SUCCESS; 4014 } 4015 4016 int hci_power_control(HCI_POWER_MODE power_mode){ 4017 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4018 int err = 0; 4019 switch (hci_stack->state){ 4020 case HCI_STATE_OFF: 4021 err = hci_power_control_state_off(power_mode); 4022 break; 4023 case HCI_STATE_INITIALIZING: 4024 err = hci_power_control_state_initializing(power_mode); 4025 break; 4026 case HCI_STATE_WORKING: 4027 err = hci_power_control_state_working(power_mode); 4028 break; 4029 case HCI_STATE_HALTING: 4030 err = hci_power_control_state_halting(power_mode); 4031 break; 4032 case HCI_STATE_FALLING_ASLEEP: 4033 err = hci_power_control_state_falling_asleep(power_mode); 4034 break; 4035 case HCI_STATE_SLEEPING: 4036 err = hci_power_control_state_sleeping(power_mode); 4037 break; 4038 default: 4039 btstack_assert(false); 4040 break; 4041 } 4042 if (err != 0){ 4043 return err; 4044 } 4045 4046 // create internal event 4047 hci_emit_state(); 4048 4049 // trigger next/first action 4050 hci_run(); 4051 4052 return 0; 4053 } 4054 4055 4056 #ifdef ENABLE_CLASSIC 4057 4058 static void hci_update_scan_enable(void){ 4059 // 2 = page scan, 1 = inq scan 4060 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4061 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4062 hci_run(); 4063 } 4064 4065 void gap_discoverable_control(uint8_t enable){ 4066 if (enable) enable = 1; // normalize argument 4067 4068 if (hci_stack->discoverable == enable){ 4069 hci_emit_discoverable_enabled(hci_stack->discoverable); 4070 return; 4071 } 4072 4073 hci_stack->discoverable = enable; 4074 hci_update_scan_enable(); 4075 } 4076 4077 void gap_connectable_control(uint8_t enable){ 4078 if (enable) enable = 1; // normalize argument 4079 4080 // don't emit event 4081 if (hci_stack->connectable == enable) return; 4082 4083 hci_stack->connectable = enable; 4084 hci_update_scan_enable(); 4085 } 4086 #endif 4087 4088 void gap_local_bd_addr(bd_addr_t address_buffer){ 4089 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4090 } 4091 4092 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4093 static void hci_host_num_completed_packets(void){ 4094 4095 // create packet manually as arrays are not supported and num_commands should not get reduced 4096 hci_reserve_packet_buffer(); 4097 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4098 4099 uint16_t size = 0; 4100 uint16_t num_handles = 0; 4101 packet[size++] = 0x35; 4102 packet[size++] = 0x0c; 4103 size++; // skip param len 4104 size++; // skip num handles 4105 4106 // add { handle, packets } entries 4107 btstack_linked_item_t * it; 4108 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4109 hci_connection_t * connection = (hci_connection_t *) it; 4110 if (connection->num_packets_completed){ 4111 little_endian_store_16(packet, size, connection->con_handle); 4112 size += 2; 4113 little_endian_store_16(packet, size, connection->num_packets_completed); 4114 size += 2; 4115 // 4116 num_handles++; 4117 connection->num_packets_completed = 0; 4118 } 4119 } 4120 4121 packet[2] = size - 3; 4122 packet[3] = num_handles; 4123 4124 hci_stack->host_completed_packets = 0; 4125 4126 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4127 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4128 4129 // release packet buffer for synchronous transport implementations 4130 if (hci_transport_synchronous()){ 4131 hci_release_packet_buffer(); 4132 hci_emit_transport_packet_sent(); 4133 } 4134 } 4135 #endif 4136 4137 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4138 UNUSED(ds); 4139 hci_stack->substate = HCI_HALTING_CLOSE; 4140 // allow packet handlers to defer final shutdown 4141 hci_emit_state(); 4142 hci_run(); 4143 } 4144 4145 static bool hci_run_acl_fragments(void){ 4146 if (hci_stack->acl_fragmentation_total_size > 0u) { 4147 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4148 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4149 if (connection) { 4150 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4151 hci_send_acl_packet_fragments(connection); 4152 return true; 4153 } 4154 } else { 4155 // connection gone -> discard further fragments 4156 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4157 hci_stack->acl_fragmentation_total_size = 0; 4158 hci_stack->acl_fragmentation_pos = 0; 4159 } 4160 } 4161 return false; 4162 } 4163 4164 #ifdef ENABLE_CLASSIC 4165 static bool hci_run_general_gap_classic(void){ 4166 4167 // assert stack is working and classic is active 4168 if (hci_classic_supported() == false) return false; 4169 if (hci_stack->state != HCI_STATE_WORKING) return false; 4170 4171 // decline incoming connections 4172 if (hci_stack->decline_reason){ 4173 uint8_t reason = hci_stack->decline_reason; 4174 hci_stack->decline_reason = 0; 4175 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4176 return true; 4177 } 4178 4179 if (hci_stack->gap_tasks != 0){ 4180 hci_run_gap_tasks_classic(); 4181 return true; 4182 } 4183 4184 // start/stop inquiry 4185 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4186 uint8_t duration = hci_stack->inquiry_state; 4187 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4188 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4189 return true; 4190 } 4191 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4192 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4193 hci_send_cmd(&hci_inquiry_cancel); 4194 return true; 4195 } 4196 // remote name request 4197 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4198 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4199 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4200 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4201 return true; 4202 } 4203 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4204 // Local OOB data 4205 if (hci_stack->classic_read_local_oob_data){ 4206 hci_stack->classic_read_local_oob_data = false; 4207 if (hci_stack->local_supported_commands[1] & 0x10u){ 4208 hci_send_cmd(&hci_read_local_extended_oob_data); 4209 } else { 4210 hci_send_cmd(&hci_read_local_oob_data); 4211 } 4212 } 4213 #endif 4214 // pairing 4215 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4216 uint8_t state = hci_stack->gap_pairing_state; 4217 uint8_t pin_code[16]; 4218 switch (state){ 4219 case GAP_PAIRING_STATE_SEND_PIN: 4220 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4221 memset(pin_code, 0, 16); 4222 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4223 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4224 break; 4225 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4226 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4227 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4228 break; 4229 case GAP_PAIRING_STATE_SEND_PASSKEY: 4230 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4231 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4232 break; 4233 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4234 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4235 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4236 break; 4237 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4238 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4239 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4240 break; 4241 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4242 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4243 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4244 break; 4245 default: 4246 break; 4247 } 4248 return true; 4249 } 4250 return false; 4251 } 4252 #endif 4253 4254 #ifdef ENABLE_BLE 4255 static bool hci_run_general_gap_le(void){ 4256 4257 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4258 4259 if (hci_stack->state != HCI_STATE_WORKING) return false; 4260 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4261 4262 4263 // Phase 1: collect what to stop 4264 4265 bool scanning_stop = false; 4266 bool connecting_stop = false; 4267 bool advertising_stop = false; 4268 4269 #ifndef ENABLE_LE_CENTRAL 4270 UNUSED(scanning_stop); 4271 UNUSED(connecting_stop); 4272 #endif 4273 #ifndef ENABLE_LE_PERIPHERAL 4274 UNUSED(advertising_stop); 4275 #endif 4276 4277 // check if own address changes 4278 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4279 4280 // check if whitelist needs modification 4281 bool whitelist_modification_pending = false; 4282 btstack_linked_list_iterator_t lit; 4283 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4284 while (btstack_linked_list_iterator_has_next(&lit)){ 4285 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4286 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4287 whitelist_modification_pending = true; 4288 break; 4289 } 4290 } 4291 // check if resolving list needs modification 4292 bool resolving_list_modification_pending = false; 4293 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4294 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4295 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4296 resolving_list_modification_pending = true; 4297 } 4298 #endif 4299 4300 #ifdef ENABLE_LE_CENTRAL 4301 // scanning control 4302 if (hci_stack->le_scanning_active) { 4303 // stop if: 4304 // - parameter change required 4305 // - it's disabled 4306 // - whitelist change required but used for scanning 4307 // - resolving list modified 4308 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4309 if ((hci_stack->le_scanning_param_update) || 4310 !hci_stack->le_scanning_enabled || 4311 scanning_uses_whitelist || 4312 resolving_list_modification_pending){ 4313 4314 scanning_stop = true; 4315 } 4316 } 4317 #endif 4318 4319 #ifdef ENABLE_LE_CENTRAL 4320 // connecting control 4321 bool connecting_with_whitelist; 4322 switch (hci_stack->le_connecting_state){ 4323 case LE_CONNECTING_DIRECT: 4324 case LE_CONNECTING_WHITELIST: 4325 // stop connecting if: 4326 // - connecting uses white and whitelist modification pending 4327 // - if it got disabled 4328 // - resolving list modified 4329 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4330 if ((connecting_with_whitelist && whitelist_modification_pending) || 4331 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4332 resolving_list_modification_pending) { 4333 4334 connecting_stop = true; 4335 } 4336 break; 4337 default: 4338 break; 4339 } 4340 #endif 4341 4342 #ifdef ENABLE_LE_PERIPHERAL 4343 // le advertisement control 4344 if (hci_stack->le_advertisements_active){ 4345 // stop if: 4346 // - parameter change required 4347 // - random address used in advertising and changes 4348 // - it's disabled 4349 // - whitelist change required but used for advertisement filter policy 4350 // - resolving list modified 4351 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4352 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4353 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4354 if (advertising_change || 4355 (advertising_uses_random_address && random_address_change) || 4356 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4357 (advertising_uses_whitelist && whitelist_modification_pending) || 4358 resolving_list_modification_pending) { 4359 4360 advertising_stop = true; 4361 } 4362 } 4363 #endif 4364 4365 4366 // Phase 2: stop everything that should be off during modifications 4367 4368 #ifdef ENABLE_LE_CENTRAL 4369 if (scanning_stop){ 4370 hci_stack->le_scanning_active = false; 4371 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4372 return true; 4373 } 4374 #endif 4375 4376 #ifdef ENABLE_LE_CENTRAL 4377 if (connecting_stop){ 4378 hci_send_cmd(&hci_le_create_connection_cancel); 4379 return true; 4380 } 4381 #endif 4382 4383 #ifdef ENABLE_LE_PERIPHERAL 4384 if (advertising_stop){ 4385 hci_stack->le_advertisements_active = false; 4386 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4387 return true; 4388 } 4389 #endif 4390 4391 // Phase 3: modify 4392 4393 if (random_address_change){ 4394 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4395 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4396 return true; 4397 } 4398 4399 #ifdef ENABLE_LE_CENTRAL 4400 if (hci_stack->le_scanning_param_update){ 4401 hci_stack->le_scanning_param_update = false; 4402 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4403 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4404 return true; 4405 } 4406 #endif 4407 4408 #ifdef ENABLE_LE_PERIPHERAL 4409 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4410 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4411 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4412 hci_send_cmd(&hci_le_set_advertising_parameters, 4413 hci_stack->le_advertisements_interval_min, 4414 hci_stack->le_advertisements_interval_max, 4415 hci_stack->le_advertisements_type, 4416 hci_stack->le_advertisements_own_addr_type, 4417 hci_stack->le_advertisements_direct_address_type, 4418 hci_stack->le_advertisements_direct_address, 4419 hci_stack->le_advertisements_channel_map, 4420 hci_stack->le_advertisements_filter_policy); 4421 return true; 4422 } 4423 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4424 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4425 uint8_t adv_data_clean[31]; 4426 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4427 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4428 hci_stack->le_advertisements_data_len); 4429 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4430 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4431 return true; 4432 } 4433 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4434 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4435 uint8_t scan_data_clean[31]; 4436 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4437 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4438 hci_stack->le_scan_response_data_len); 4439 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4440 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4441 return true; 4442 } 4443 #endif 4444 4445 4446 #ifdef ENABLE_LE_CENTRAL 4447 // if connect with whitelist was active and is not cancelled yet, wait until next time 4448 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4449 #endif 4450 4451 // LE Whitelist Management 4452 if (whitelist_modification_pending){ 4453 // add/remove entries 4454 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4455 while (btstack_linked_list_iterator_has_next(&lit)){ 4456 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4457 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4458 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4459 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4460 return true; 4461 } 4462 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4463 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4464 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4465 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4466 return true; 4467 } 4468 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4469 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4470 btstack_memory_whitelist_entry_free(entry); 4471 } 4472 } 4473 } 4474 4475 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4476 // LE Resolving List Management 4477 if (resolving_list_supported) { 4478 uint16_t i; 4479 switch (hci_stack->le_resolving_list_state) { 4480 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4481 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4482 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4483 return true; 4484 case LE_RESOLVING_LIST_READ_SIZE: 4485 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4486 hci_send_cmd(&hci_le_read_resolving_list_size); 4487 return true; 4488 case LE_RESOLVING_LIST_SEND_CLEAR: 4489 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4490 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4491 sizeof(hci_stack->le_resolving_list_add_entries)); 4492 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4493 sizeof(hci_stack->le_resolving_list_remove_entries)); 4494 hci_send_cmd(&hci_le_clear_resolving_list); 4495 return true; 4496 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4497 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4498 uint8_t offset = i >> 3; 4499 uint8_t mask = 1 << (i & 7); 4500 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4501 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4502 bd_addr_t peer_identity_addreses; 4503 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4504 sm_key_t peer_irk; 4505 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4506 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4507 4508 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4509 // trigger whitelist entry 'update' (work around for controller bug) 4510 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4511 while (btstack_linked_list_iterator_has_next(&lit)) { 4512 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4513 if (entry->address_type != peer_identity_addr_type) continue; 4514 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4515 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4516 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4517 } 4518 #endif 4519 4520 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4521 peer_identity_addreses); 4522 return true; 4523 } 4524 4525 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4526 4527 /* fall through */ 4528 4529 case LE_RESOLVING_LIST_ADD_ENTRIES: 4530 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4531 uint8_t offset = i >> 3; 4532 uint8_t mask = 1 << (i & 7); 4533 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4534 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4535 bd_addr_t peer_identity_addreses; 4536 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4537 sm_key_t peer_irk; 4538 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4539 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4540 const uint8_t *local_irk = gap_get_persistent_irk(); 4541 // command uses format specifier 'P' that stores 16-byte value without flip 4542 uint8_t local_irk_flipped[16]; 4543 uint8_t peer_irk_flipped[16]; 4544 reverse_128(local_irk, local_irk_flipped); 4545 reverse_128(peer_irk, peer_irk_flipped); 4546 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4547 peer_irk_flipped, local_irk_flipped); 4548 return true; 4549 } 4550 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4551 break; 4552 4553 default: 4554 break; 4555 } 4556 } 4557 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4558 #endif 4559 4560 // Phase 4: restore state 4561 4562 #ifdef ENABLE_LE_CENTRAL 4563 // re-start scanning 4564 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4565 hci_stack->le_scanning_active = true; 4566 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4567 return true; 4568 } 4569 #endif 4570 4571 #ifdef ENABLE_LE_CENTRAL 4572 // re-start connecting 4573 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4574 bd_addr_t null_addr; 4575 memset(null_addr, 0, 6); 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, // scan interval: 60 ms 4580 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4581 1, // use whitelist 4582 0, // peer address type 4583 null_addr, // 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 return true; 4593 } 4594 #endif 4595 4596 #ifdef ENABLE_LE_PERIPHERAL 4597 // re-start advertising 4598 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4599 // check if advertisements should be enabled given 4600 hci_stack->le_advertisements_active = true; 4601 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4602 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4603 return true; 4604 } 4605 #endif 4606 4607 return false; 4608 } 4609 #endif 4610 4611 static bool hci_run_general_pending_commands(void){ 4612 btstack_linked_item_t * it; 4613 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4614 hci_connection_t * connection = (hci_connection_t *) it; 4615 4616 switch(connection->state){ 4617 case SEND_CREATE_CONNECTION: 4618 switch(connection->address_type){ 4619 #ifdef ENABLE_CLASSIC 4620 case BD_ADDR_TYPE_ACL: 4621 log_info("sending hci_create_connection"); 4622 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4623 break; 4624 #endif 4625 default: 4626 #ifdef ENABLE_BLE 4627 #ifdef ENABLE_LE_CENTRAL 4628 log_info("sending hci_le_create_connection"); 4629 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4630 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4631 hci_send_cmd(&hci_le_create_connection, 4632 hci_stack->le_connection_scan_interval, // conn scan interval 4633 hci_stack->le_connection_scan_window, // conn scan windows 4634 0, // don't use whitelist 4635 connection->address_type, // peer address type 4636 connection->address, // peer bd addr 4637 hci_stack->le_connection_own_addr_type, // our addr type: 4638 hci_stack->le_connection_interval_min, // conn interval min 4639 hci_stack->le_connection_interval_max, // conn interval max 4640 hci_stack->le_connection_latency, // conn latency 4641 hci_stack->le_supervision_timeout, // conn latency 4642 hci_stack->le_minimum_ce_length, // min ce length 4643 hci_stack->le_maximum_ce_length // max ce length 4644 ); 4645 connection->state = SENT_CREATE_CONNECTION; 4646 #endif 4647 #endif 4648 break; 4649 } 4650 return true; 4651 4652 #ifdef ENABLE_CLASSIC 4653 case RECEIVED_CONNECTION_REQUEST: 4654 connection->role = HCI_ROLE_SLAVE; 4655 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4656 log_info("sending hci_accept_connection_request"); 4657 connection->state = ACCEPTED_CONNECTION_REQUEST; 4658 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4659 } 4660 return true; 4661 #endif 4662 4663 #ifdef ENABLE_BLE 4664 #ifdef ENABLE_LE_CENTRAL 4665 case SEND_CANCEL_CONNECTION: 4666 connection->state = SENT_CANCEL_CONNECTION; 4667 hci_send_cmd(&hci_le_create_connection_cancel); 4668 return true; 4669 #endif 4670 #endif 4671 case SEND_DISCONNECT: 4672 connection->state = SENT_DISCONNECT; 4673 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4674 return true; 4675 4676 default: 4677 break; 4678 } 4679 4680 // no further commands if connection is about to get shut down 4681 if (connection->state == SENT_DISCONNECT) continue; 4682 4683 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4684 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4685 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4686 return true; 4687 } 4688 4689 #ifdef ENABLE_CLASSIC 4690 4691 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4692 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4693 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4694 return true; 4695 } 4696 4697 // Handling link key request requires remote supported features 4698 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4699 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4700 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4701 4702 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4703 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4704 if (have_link_key && security_level_sufficient){ 4705 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4706 } else { 4707 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4708 } 4709 return true; 4710 } 4711 4712 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4713 log_info("denying to pin request"); 4714 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4715 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4716 return true; 4717 } 4718 4719 // security assessment requires remote features 4720 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4721 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4722 hci_ssp_assess_security_on_io_cap_request(connection); 4723 // 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 4724 } 4725 4726 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4727 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4728 // set authentication requirements: 4729 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4730 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4731 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4732 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4733 authreq |= 1; 4734 } 4735 bool bonding = hci_stack->bondable; 4736 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4737 // if we have received IO Cap Response, we're in responder role 4738 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4739 if (bonding && !remote_bonding){ 4740 log_info("Remote not bonding, dropping local flag"); 4741 bonding = false; 4742 } 4743 } 4744 if (bonding){ 4745 if (connection->bonding_flags & BONDING_DEDICATED){ 4746 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4747 } else { 4748 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4749 } 4750 } 4751 uint8_t have_oob_data = 0; 4752 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4753 if (connection->classic_oob_c_192 != NULL){ 4754 have_oob_data |= 1; 4755 } 4756 if (connection->classic_oob_c_256 != NULL){ 4757 have_oob_data |= 2; 4758 } 4759 #endif 4760 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4761 return true; 4762 } 4763 4764 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4765 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4766 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4767 return true; 4768 } 4769 4770 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4771 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4772 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4773 const uint8_t zero[16] = { 0 }; 4774 const uint8_t * r_192 = zero; 4775 const uint8_t * c_192 = zero; 4776 const uint8_t * r_256 = zero; 4777 const uint8_t * c_256 = zero; 4778 // verify P-256 OOB 4779 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4780 c_256 = connection->classic_oob_c_256; 4781 if (connection->classic_oob_r_256 != NULL) { 4782 r_256 = connection->classic_oob_r_256; 4783 } 4784 } 4785 // verify P-192 OOB 4786 if ((connection->classic_oob_c_192 != NULL)) { 4787 c_192 = connection->classic_oob_c_192; 4788 if (connection->classic_oob_r_192 != NULL) { 4789 r_192 = connection->classic_oob_r_192; 4790 } 4791 } 4792 4793 // assess security 4794 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4795 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4796 if (need_level_4 && !can_reach_level_4){ 4797 log_info("Level 4 required, but not possible -> abort"); 4798 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4799 // send oob negative reply 4800 c_256 = NULL; 4801 c_192 = NULL; 4802 } 4803 4804 // Reply 4805 if (c_256 != zero) { 4806 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4807 } else if (c_192 != zero){ 4808 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4809 } else { 4810 hci_stack->classic_oob_con_handle = connection->con_handle; 4811 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4812 } 4813 return true; 4814 } 4815 #endif 4816 4817 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4818 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4819 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4820 return true; 4821 } 4822 4823 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4824 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4825 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4826 return true; 4827 } 4828 4829 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4830 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4831 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4832 return true; 4833 } 4834 4835 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4836 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4837 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4838 connection->state = SENT_DISCONNECT; 4839 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4840 return true; 4841 } 4842 4843 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4844 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4845 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4846 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4847 return true; 4848 } 4849 4850 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4851 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4852 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4853 return true; 4854 } 4855 4856 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4857 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4858 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4859 return true; 4860 } 4861 4862 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4863 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4864 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4865 return true; 4866 } 4867 4868 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4869 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4870 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4871 return true; 4872 } 4873 4874 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4875 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4876 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4877 return true; 4878 } 4879 #endif 4880 4881 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4882 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4883 #ifdef ENABLE_CLASSIC 4884 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4885 #endif 4886 if (connection->state != SENT_DISCONNECT){ 4887 connection->state = SENT_DISCONNECT; 4888 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4889 return true; 4890 } 4891 } 4892 4893 #ifdef ENABLE_CLASSIC 4894 uint16_t sniff_min_interval; 4895 switch (connection->sniff_min_interval){ 4896 case 0: 4897 break; 4898 case 0xffff: 4899 connection->sniff_min_interval = 0; 4900 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4901 return true; 4902 default: 4903 sniff_min_interval = connection->sniff_min_interval; 4904 connection->sniff_min_interval = 0; 4905 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4906 return true; 4907 } 4908 4909 if (connection->sniff_subrating_max_latency != 0xffff){ 4910 uint16_t max_latency = connection->sniff_subrating_max_latency; 4911 connection->sniff_subrating_max_latency = 0; 4912 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4913 return true; 4914 } 4915 4916 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4917 uint8_t service_type = (uint8_t) connection->qos_service_type; 4918 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4919 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); 4920 return true; 4921 } 4922 4923 if (connection->request_role != HCI_ROLE_INVALID){ 4924 hci_role_t role = connection->request_role; 4925 connection->request_role = HCI_ROLE_INVALID; 4926 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4927 return true; 4928 } 4929 #endif 4930 4931 #ifdef ENABLE_BLE 4932 switch (connection->le_con_parameter_update_state){ 4933 // response to L2CAP CON PARAMETER UPDATE REQUEST 4934 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4935 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4936 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4937 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4938 0x0000, 0xffff); 4939 return true; 4940 case CON_PARAMETER_UPDATE_REPLY: 4941 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4942 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4943 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4944 0x0000, 0xffff); 4945 return true; 4946 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4947 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4948 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4949 return true; 4950 default: 4951 break; 4952 } 4953 if (connection->le_phy_update_all_phys != 0xffu){ 4954 uint8_t all_phys = connection->le_phy_update_all_phys; 4955 connection->le_phy_update_all_phys = 0xff; 4956 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); 4957 return true; 4958 } 4959 #endif 4960 } 4961 return false; 4962 } 4963 4964 static void hci_run(void){ 4965 4966 bool done; 4967 4968 // send continuation fragments first, as they block the prepared packet buffer 4969 done = hci_run_acl_fragments(); 4970 if (done) return; 4971 4972 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4973 // send host num completed packets next as they don't require num_cmd_packets > 0 4974 if (!hci_can_send_comand_packet_transport()) return; 4975 if (hci_stack->host_completed_packets){ 4976 hci_host_num_completed_packets(); 4977 return; 4978 } 4979 #endif 4980 4981 if (!hci_can_send_command_packet_now()) return; 4982 4983 // global/non-connection oriented commands 4984 4985 4986 #ifdef ENABLE_CLASSIC 4987 // general gap classic 4988 done = hci_run_general_gap_classic(); 4989 if (done) return; 4990 #endif 4991 4992 #ifdef ENABLE_BLE 4993 // general gap le 4994 done = hci_run_general_gap_le(); 4995 if (done) return; 4996 #endif 4997 4998 // send pending HCI commands 4999 done = hci_run_general_pending_commands(); 5000 if (done) return; 5001 5002 // stack state sub statemachines 5003 hci_connection_t * connection; 5004 switch (hci_stack->state){ 5005 case HCI_STATE_INITIALIZING: 5006 hci_initializing_run(); 5007 break; 5008 5009 case HCI_STATE_HALTING: 5010 5011 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5012 switch (hci_stack->substate){ 5013 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5014 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5015 5016 #ifdef ENABLE_BLE 5017 #ifdef ENABLE_LE_CENTRAL 5018 hci_whitelist_free(); 5019 #endif 5020 #endif 5021 // close all open connections 5022 connection = (hci_connection_t *) hci_stack->connections; 5023 if (connection){ 5024 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5025 if (!hci_can_send_command_packet_now()) return; 5026 5027 // check state 5028 if (connection->state == SENT_DISCONNECT) return; 5029 connection->state = SENT_DISCONNECT; 5030 5031 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5032 5033 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5034 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5035 5036 // ... which would be ignored anyway as we shutdown (free) the connection now 5037 hci_shutdown_connection(connection); 5038 5039 // finally, send the disconnect command 5040 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5041 return; 5042 } 5043 5044 btstack_run_loop_remove_timer(&hci_stack->timeout); 5045 5046 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5047 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5048 log_info("HCI_STATE_HALTING: wait 50 ms"); 5049 hci_stack->substate = HCI_HALTING_W4_TIMER; 5050 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5051 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5052 btstack_run_loop_add_timer(&hci_stack->timeout); 5053 break; 5054 } 5055 5056 /* fall through */ 5057 5058 case HCI_HALTING_CLOSE: 5059 // close left over connections (that had not been properly closed before) 5060 hci_discard_connections(); 5061 5062 log_info("HCI_STATE_HALTING, calling off"); 5063 5064 // switch mode 5065 hci_power_control_off(); 5066 5067 log_info("HCI_STATE_HALTING, emitting state"); 5068 hci_emit_state(); 5069 log_info("HCI_STATE_HALTING, done"); 5070 break; 5071 5072 case HCI_HALTING_W4_TIMER: 5073 // keep waiting 5074 5075 break; 5076 default: 5077 break; 5078 } 5079 5080 break; 5081 5082 case HCI_STATE_FALLING_ASLEEP: 5083 switch(hci_stack->substate) { 5084 case HCI_FALLING_ASLEEP_DISCONNECT: 5085 log_info("HCI_STATE_FALLING_ASLEEP"); 5086 // close all open connections 5087 connection = (hci_connection_t *) hci_stack->connections; 5088 if (connection){ 5089 5090 // send disconnect 5091 if (!hci_can_send_command_packet_now()) return; 5092 5093 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5094 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5095 5096 // send disconnected event right away - causes higher layer connections to get closed, too. 5097 hci_shutdown_connection(connection); 5098 return; 5099 } 5100 5101 if (hci_classic_supported()){ 5102 // disable page and inquiry scan 5103 if (!hci_can_send_command_packet_now()) return; 5104 5105 log_info("HCI_STATE_HALTING, disabling inq scans"); 5106 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5107 5108 // continue in next sub state 5109 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5110 break; 5111 } 5112 5113 /* fall through */ 5114 5115 case HCI_FALLING_ASLEEP_COMPLETE: 5116 log_info("HCI_STATE_HALTING, calling sleep"); 5117 // switch mode 5118 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5119 hci_emit_state(); 5120 break; 5121 5122 default: 5123 break; 5124 } 5125 break; 5126 5127 default: 5128 break; 5129 } 5130 } 5131 5132 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5133 // house-keeping 5134 5135 #ifdef ENABLE_CLASSIC 5136 bd_addr_t addr; 5137 hci_connection_t * conn; 5138 #endif 5139 #ifdef ENABLE_LE_CENTRAL 5140 uint8_t initiator_filter_policy; 5141 #endif 5142 5143 uint16_t opcode = little_endian_read_16(packet, 0); 5144 switch (opcode) { 5145 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5146 hci_stack->loopback_mode = packet[3]; 5147 break; 5148 5149 #ifdef ENABLE_CLASSIC 5150 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5151 reverse_bd_addr(&packet[3], addr); 5152 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5153 5154 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5155 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5156 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5157 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5158 } 5159 5160 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5161 if (!conn) { 5162 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5163 if (!conn) { 5164 // notify client that alloc failed 5165 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5166 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5167 } 5168 conn->state = SEND_CREATE_CONNECTION; 5169 conn->role = HCI_ROLE_MASTER; 5170 } 5171 5172 conn->con_handle = HCI_CON_HANDLE_INVALID; 5173 conn->role = HCI_ROLE_INVALID; 5174 5175 log_info("conn state %u", conn->state); 5176 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5177 switch (conn->state) { 5178 // if connection active exists 5179 case OPEN: 5180 // and OPEN, emit connection complete command 5181 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5182 // packet not sent to controller 5183 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5184 case RECEIVED_DISCONNECTION_COMPLETE: 5185 // create connection triggered in disconnect complete event, let's do it now 5186 break; 5187 case SEND_CREATE_CONNECTION: 5188 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5189 break; 5190 default: 5191 // otherwise, just ignore as it is already in the open process 5192 // packet not sent to controller 5193 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5194 } 5195 conn->state = SENT_CREATE_CONNECTION; 5196 5197 // track outgoing connection 5198 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5199 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5200 break; 5201 5202 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5203 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5204 // setup_synchronous_connection? Voice setting at offset 22 5205 // TODO: compare to current setting if sco connection already active 5206 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5207 break; 5208 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5209 // accept_synchronous_connection? Voice setting at offset 18 5210 // TODO: compare to current setting if sco connection already active 5211 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5212 break; 5213 #endif 5214 #endif 5215 5216 #ifdef ENABLE_BLE 5217 #ifdef ENABLE_LE_CENTRAL 5218 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5219 // white list used? 5220 initiator_filter_policy = packet[7]; 5221 switch (initiator_filter_policy) { 5222 case 0: 5223 // whitelist not used 5224 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5225 break; 5226 case 1: 5227 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5228 break; 5229 default: 5230 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5231 break; 5232 } 5233 // track outgoing connection 5234 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5235 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5236 break; 5237 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5238 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5239 break; 5240 #endif 5241 #endif 5242 default: 5243 break; 5244 } 5245 5246 hci_stack->num_cmd_packets--; 5247 5248 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5249 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5250 if (err != 0){ 5251 return ERROR_CODE_HARDWARE_FAILURE; 5252 } 5253 return ERROR_CODE_SUCCESS; 5254 } 5255 5256 // disconnect because of security block 5257 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5258 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5259 if (!connection) return; 5260 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5261 } 5262 5263 5264 // Configure Secure Simple Pairing 5265 5266 #ifdef ENABLE_CLASSIC 5267 5268 // enable will enable SSP during init 5269 void gap_ssp_set_enable(int enable){ 5270 hci_stack->ssp_enable = enable; 5271 } 5272 5273 static int hci_local_ssp_activated(void){ 5274 return gap_ssp_supported() && hci_stack->ssp_enable; 5275 } 5276 5277 // if set, BTstack will respond to io capability request using authentication requirement 5278 void gap_ssp_set_io_capability(int io_capability){ 5279 hci_stack->ssp_io_capability = io_capability; 5280 } 5281 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5282 hci_stack->ssp_authentication_requirement = authentication_requirement; 5283 } 5284 5285 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5286 void gap_ssp_set_auto_accept(int auto_accept){ 5287 hci_stack->ssp_auto_accept = auto_accept; 5288 } 5289 5290 void gap_secure_connections_enable(bool enable){ 5291 hci_stack->secure_connections_enable = enable; 5292 } 5293 5294 #endif 5295 5296 // va_list part of hci_send_cmd 5297 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5298 if (!hci_can_send_command_packet_now()){ 5299 log_error("hci_send_cmd called but cannot send packet now"); 5300 return ERROR_CODE_COMMAND_DISALLOWED; 5301 } 5302 5303 // for HCI INITIALIZATION 5304 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5305 hci_stack->last_cmd_opcode = cmd->opcode; 5306 5307 hci_reserve_packet_buffer(); 5308 uint8_t * packet = hci_stack->hci_packet_buffer; 5309 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5310 uint8_t status = hci_send_cmd_packet(packet, size); 5311 5312 // release packet buffer on error or for synchronous transport implementations 5313 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5314 hci_release_packet_buffer(); 5315 hci_emit_transport_packet_sent(); 5316 } 5317 5318 return status; 5319 } 5320 5321 /** 5322 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5323 */ 5324 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5325 va_list argptr; 5326 va_start(argptr, cmd); 5327 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5328 va_end(argptr); 5329 return status; 5330 } 5331 5332 // Create various non-HCI events. 5333 // TODO: generalize, use table similar to hci_create_command 5334 5335 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5336 // dump packet 5337 if (dump) { 5338 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5339 } 5340 5341 // dispatch to all event handlers 5342 btstack_linked_list_iterator_t it; 5343 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5344 while (btstack_linked_list_iterator_has_next(&it)){ 5345 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5346 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5347 } 5348 } 5349 5350 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5351 if (!hci_stack->acl_packet_handler) return; 5352 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5353 } 5354 5355 #ifdef ENABLE_CLASSIC 5356 static void hci_notify_if_sco_can_send_now(void){ 5357 // notify SCO sender if waiting 5358 if (!hci_stack->sco_waiting_for_can_send_now) return; 5359 if (hci_can_send_sco_packet_now()){ 5360 hci_stack->sco_waiting_for_can_send_now = 0; 5361 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5362 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5363 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5364 } 5365 } 5366 5367 // parsing end emitting has been merged to reduce code size 5368 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5369 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5370 5371 uint8_t * eir_data; 5372 ad_context_t context; 5373 const uint8_t * name; 5374 uint8_t name_len; 5375 5376 if (size < 3) return; 5377 5378 int event_type = hci_event_packet_get_type(packet); 5379 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5380 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5381 5382 switch (event_type){ 5383 case HCI_EVENT_INQUIRY_RESULT: 5384 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5385 if (size != (3 + (num_responses * 14))) return; 5386 break; 5387 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5388 if (size != 257) return; 5389 if (num_responses != 1) return; 5390 break; 5391 default: 5392 return; 5393 } 5394 5395 // event[1] is set at the end 5396 int i; 5397 for (i=0; i<num_responses;i++){ 5398 memset(event, 0, sizeof(event)); 5399 event[0] = GAP_EVENT_INQUIRY_RESULT; 5400 uint8_t event_size = 27; // if name is not set by EIR 5401 5402 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5403 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5404 (void)memcpy(&event[9], 5405 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5406 3); // class of device 5407 (void)memcpy(&event[12], 5408 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5409 2); // clock offset 5410 5411 switch (event_type){ 5412 case HCI_EVENT_INQUIRY_RESULT: 5413 // 14,15,16,17 = 0, size 18 5414 break; 5415 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5416 event[14] = 1; 5417 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5418 // 16,17 = 0, size 18 5419 break; 5420 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5421 event[14] = 1; 5422 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5423 // EIR packets only contain a single inquiry response 5424 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5425 name = NULL; 5426 // Iterate over EIR data 5427 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5428 uint8_t data_type = ad_iterator_get_data_type(&context); 5429 uint8_t data_size = ad_iterator_get_data_len(&context); 5430 const uint8_t * data = ad_iterator_get_data(&context); 5431 // Prefer Complete Local Name over Shortened Local Name 5432 switch (data_type){ 5433 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5434 if (name) continue; 5435 /* fall through */ 5436 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5437 name = data; 5438 name_len = data_size; 5439 break; 5440 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5441 if (data_size != 8) break; 5442 event[16] = 1; 5443 memcpy(&event[17], data, 8); 5444 break; 5445 default: 5446 break; 5447 } 5448 } 5449 if (name){ 5450 event[25] = 1; 5451 // truncate name if needed 5452 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5453 event[26] = len; 5454 (void)memcpy(&event[27], name, len); 5455 event_size += len; 5456 } 5457 break; 5458 default: 5459 return; 5460 } 5461 event[1] = event_size - 2; 5462 hci_emit_event(event, event_size, 1); 5463 } 5464 } 5465 #endif 5466 5467 void hci_emit_state(void){ 5468 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5469 uint8_t event[3]; 5470 event[0] = BTSTACK_EVENT_STATE; 5471 event[1] = sizeof(event) - 2u; 5472 event[2] = hci_stack->state; 5473 hci_emit_event(event, sizeof(event), 1); 5474 } 5475 5476 #ifdef ENABLE_CLASSIC 5477 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5478 uint8_t event[13]; 5479 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5480 event[1] = sizeof(event) - 2; 5481 event[2] = status; 5482 little_endian_store_16(event, 3, con_handle); 5483 reverse_bd_addr(address, &event[5]); 5484 event[11] = 1; // ACL connection 5485 event[12] = 0; // encryption disabled 5486 hci_emit_event(event, sizeof(event), 1); 5487 } 5488 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5489 if (disable_l2cap_timeouts) return; 5490 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5491 uint8_t event[4]; 5492 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5493 event[1] = sizeof(event) - 2; 5494 little_endian_store_16(event, 2, conn->con_handle); 5495 hci_emit_event(event, sizeof(event), 1); 5496 } 5497 #endif 5498 5499 #ifdef ENABLE_BLE 5500 #ifdef ENABLE_LE_CENTRAL 5501 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){ 5502 uint8_t event[21]; 5503 event[0] = HCI_EVENT_LE_META; 5504 event[1] = sizeof(event) - 2u; 5505 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5506 event[3] = status; 5507 little_endian_store_16(event, 4, con_handle); 5508 event[6] = 0; // TODO: role 5509 event[7] = address_type; 5510 reverse_bd_addr(address, &event[8]); 5511 little_endian_store_16(event, 14, 0); // interval 5512 little_endian_store_16(event, 16, 0); // latency 5513 little_endian_store_16(event, 18, 0); // supervision timeout 5514 event[20] = 0; // master clock accuracy 5515 hci_emit_event(event, sizeof(event), 1); 5516 } 5517 #endif 5518 #endif 5519 5520 static void hci_emit_transport_packet_sent(void){ 5521 // notify upper stack that it might be possible to send again 5522 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5523 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5524 } 5525 5526 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5527 uint8_t event[6]; 5528 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5529 event[1] = sizeof(event) - 2u; 5530 event[2] = 0; // status = OK 5531 little_endian_store_16(event, 3, con_handle); 5532 event[5] = reason; 5533 hci_emit_event(event, sizeof(event), 1); 5534 } 5535 5536 static void hci_emit_nr_connections_changed(void){ 5537 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5538 uint8_t event[3]; 5539 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5540 event[1] = sizeof(event) - 2u; 5541 event[2] = nr_hci_connections(); 5542 hci_emit_event(event, sizeof(event), 1); 5543 } 5544 5545 static void hci_emit_hci_open_failed(void){ 5546 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5547 uint8_t event[2]; 5548 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5549 event[1] = sizeof(event) - 2u; 5550 hci_emit_event(event, sizeof(event), 1); 5551 } 5552 5553 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5554 log_info("hci_emit_dedicated_bonding_result %u ", status); 5555 uint8_t event[9]; 5556 int pos = 0; 5557 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5558 event[pos++] = sizeof(event) - 2u; 5559 event[pos++] = status; 5560 reverse_bd_addr(address, &event[pos]); 5561 hci_emit_event(event, sizeof(event), 1); 5562 } 5563 5564 5565 #ifdef ENABLE_CLASSIC 5566 5567 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5568 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5569 uint8_t event[5]; 5570 int pos = 0; 5571 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5572 event[pos++] = sizeof(event) - 2; 5573 little_endian_store_16(event, 2, con_handle); 5574 pos += 2; 5575 event[pos++] = level; 5576 hci_emit_event(event, sizeof(event), 1); 5577 } 5578 5579 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5580 if (!connection) return LEVEL_0; 5581 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5582 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5583 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5584 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5585 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5586 // LEVEL 4 always requires 128 bit encrytion key size 5587 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5588 security_level = LEVEL_3; 5589 } 5590 return security_level; 5591 } 5592 5593 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5594 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5595 uint8_t event[3]; 5596 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5597 event[1] = sizeof(event) - 2; 5598 event[2] = enabled; 5599 hci_emit_event(event, sizeof(event), 1); 5600 } 5601 5602 // query if remote side supports eSCO 5603 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5604 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5605 if (!connection) return false; 5606 return (connection->remote_supported_features[0] & 1) != 0; 5607 } 5608 5609 static bool hci_ssp_supported(hci_connection_t * connection){ 5610 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5611 return (connection->bonding_flags & mask) == mask; 5612 } 5613 5614 // query if remote side supports SSP 5615 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5616 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5617 if (!connection) return false; 5618 return hci_ssp_supported(connection) ? 1 : 0; 5619 } 5620 5621 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5622 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5623 } 5624 5625 /** 5626 * Check if remote supported features query has completed 5627 */ 5628 bool hci_remote_features_available(hci_con_handle_t handle){ 5629 hci_connection_t * connection = hci_connection_for_handle(handle); 5630 if (!connection) return false; 5631 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5632 } 5633 5634 /** 5635 * Trigger remote supported features query 5636 */ 5637 5638 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5639 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5640 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5641 } 5642 } 5643 5644 void hci_remote_features_query(hci_con_handle_t con_handle){ 5645 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5646 if (!connection) return; 5647 hci_trigger_remote_features_for_connection(connection); 5648 hci_run(); 5649 } 5650 5651 // GAP API 5652 /** 5653 * @bbrief enable/disable bonding. default is enabled 5654 * @praram enabled 5655 */ 5656 void gap_set_bondable_mode(int enable){ 5657 hci_stack->bondable = enable ? 1 : 0; 5658 } 5659 /** 5660 * @brief Get bondable mode. 5661 * @return 1 if bondable 5662 */ 5663 int gap_get_bondable_mode(void){ 5664 return hci_stack->bondable; 5665 } 5666 5667 /** 5668 * @brief map link keys to security levels 5669 */ 5670 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5671 switch (link_key_type){ 5672 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5673 return LEVEL_4; 5674 case COMBINATION_KEY: 5675 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5676 return LEVEL_3; 5677 default: 5678 return LEVEL_2; 5679 } 5680 } 5681 5682 /** 5683 * @brief map link keys to secure connection yes/no 5684 */ 5685 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5686 switch (link_key_type){ 5687 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5688 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5689 return 1; 5690 default: 5691 return 0; 5692 } 5693 } 5694 5695 /** 5696 * @brief map link keys to authenticated 5697 */ 5698 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5699 switch (link_key_type){ 5700 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5701 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5702 return 1; 5703 default: 5704 return 0; 5705 } 5706 } 5707 5708 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5709 log_info("gap_mitm_protection_required_for_security_level %u", level); 5710 return level > LEVEL_2; 5711 } 5712 5713 /** 5714 * @brief get current security level 5715 */ 5716 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5717 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5718 if (!connection) return LEVEL_0; 5719 return gap_security_level_for_connection(connection); 5720 } 5721 5722 /** 5723 * @brief request connection to device to 5724 * @result GAP_AUTHENTICATION_RESULT 5725 */ 5726 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5727 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5728 if (!connection){ 5729 hci_emit_security_level(con_handle, LEVEL_0); 5730 return; 5731 } 5732 5733 btstack_assert(hci_is_le_connection(connection) == false); 5734 5735 // 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) 5736 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5737 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5738 requested_level = LEVEL_4; 5739 } 5740 5741 gap_security_level_t current_level = gap_security_level(con_handle); 5742 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5743 requested_level, connection->requested_security_level, current_level); 5744 5745 // authentication active if authentication request was sent or planned level > 0 5746 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5747 if (authentication_active){ 5748 // authentication already active 5749 if (connection->requested_security_level < requested_level){ 5750 // increase requested level as new level is higher 5751 // TODO: handle re-authentication when done 5752 connection->requested_security_level = requested_level; 5753 } 5754 } else { 5755 // no request active, notify if security sufficient 5756 if (requested_level <= current_level){ 5757 hci_emit_security_level(con_handle, current_level); 5758 return; 5759 } 5760 5761 // store request 5762 connection->requested_security_level = requested_level; 5763 5764 // request remote features if not already active 5765 hci_remote_features_query(con_handle); 5766 5767 // start to authenticate connection 5768 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5769 hci_run(); 5770 } 5771 } 5772 5773 /** 5774 * @brief start dedicated bonding with device. disconnect after bonding 5775 * @param device 5776 * @param request MITM protection 5777 * @result GAP_DEDICATED_BONDING_COMPLETE 5778 */ 5779 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5780 5781 // create connection state machine 5782 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5783 5784 if (!connection){ 5785 return BTSTACK_MEMORY_ALLOC_FAILED; 5786 } 5787 5788 // delete linkn key 5789 gap_drop_link_key_for_bd_addr(device); 5790 5791 // configure LEVEL_2/3, dedicated bonding 5792 connection->state = SEND_CREATE_CONNECTION; 5793 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5794 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5795 connection->bonding_flags = BONDING_DEDICATED; 5796 5797 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5798 5799 // handle: connnection failure (connection complete != ok) 5800 // handle: authentication failure 5801 // handle: disconnect on done 5802 5803 hci_run(); 5804 5805 return 0; 5806 } 5807 5808 void gap_set_local_name(const char * local_name){ 5809 hci_stack->local_name = local_name; 5810 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5811 // also update EIR if not set by user 5812 if (hci_stack->eir_data == NULL){ 5813 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5814 } 5815 hci_run(); 5816 } 5817 #endif 5818 5819 5820 #ifdef ENABLE_BLE 5821 5822 #ifdef ENABLE_LE_CENTRAL 5823 void gap_start_scan(void){ 5824 hci_stack->le_scanning_enabled = true; 5825 hci_run(); 5826 } 5827 5828 void gap_stop_scan(void){ 5829 hci_stack->le_scanning_enabled = false; 5830 hci_run(); 5831 } 5832 5833 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5834 hci_stack->le_scan_type = scan_type; 5835 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5836 hci_stack->le_scan_interval = scan_interval; 5837 hci_stack->le_scan_window = scan_window; 5838 hci_stack->le_scanning_param_update = true; 5839 hci_run(); 5840 } 5841 5842 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5843 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5844 } 5845 5846 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5847 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5848 if (!conn){ 5849 // disallow if le connection is already outgoing 5850 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5851 log_error("le connection already active"); 5852 return ERROR_CODE_COMMAND_DISALLOWED; 5853 } 5854 5855 log_info("gap_connect: no connection exists yet, creating context"); 5856 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5857 if (!conn){ 5858 // notify client that alloc failed 5859 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5860 log_info("gap_connect: failed to alloc hci_connection_t"); 5861 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5862 } 5863 5864 // set le connecting state 5865 if (hci_is_le_connection_type(addr_type)){ 5866 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5867 } 5868 5869 conn->state = SEND_CREATE_CONNECTION; 5870 log_info("gap_connect: send create connection next"); 5871 hci_run(); 5872 return ERROR_CODE_SUCCESS; 5873 } 5874 5875 if (!hci_is_le_connection(conn) || 5876 (conn->state == SEND_CREATE_CONNECTION) || 5877 (conn->state == SENT_CREATE_CONNECTION)) { 5878 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5879 log_error("gap_connect: classic connection or connect is already being created"); 5880 return GATT_CLIENT_IN_WRONG_STATE; 5881 } 5882 5883 // check if connection was just disconnected 5884 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5885 log_info("gap_connect: send create connection (again)"); 5886 conn->state = SEND_CREATE_CONNECTION; 5887 hci_run(); 5888 return ERROR_CODE_SUCCESS; 5889 } 5890 5891 log_info("gap_connect: context exists with state %u", conn->state); 5892 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5893 hci_run(); 5894 return ERROR_CODE_SUCCESS; 5895 } 5896 5897 // @assumption: only a single outgoing LE Connection exists 5898 static hci_connection_t * gap_get_outgoing_connection(void){ 5899 btstack_linked_item_t *it; 5900 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5901 hci_connection_t * conn = (hci_connection_t *) it; 5902 if (!hci_is_le_connection(conn)) continue; 5903 switch (conn->state){ 5904 case SEND_CREATE_CONNECTION: 5905 case SENT_CREATE_CONNECTION: 5906 case SENT_CANCEL_CONNECTION: 5907 return conn; 5908 default: 5909 break; 5910 }; 5911 } 5912 return NULL; 5913 } 5914 5915 uint8_t gap_connect_cancel(void){ 5916 hci_connection_t * conn = gap_get_outgoing_connection(); 5917 if (!conn) return 0; 5918 switch (conn->state){ 5919 case SEND_CREATE_CONNECTION: 5920 // skip sending create connection and emit event instead 5921 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5922 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5923 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5924 btstack_memory_hci_connection_free( conn ); 5925 break; 5926 case SENT_CREATE_CONNECTION: 5927 // request to send cancel connection 5928 conn->state = SEND_CANCEL_CONNECTION; 5929 hci_run(); 5930 break; 5931 default: 5932 break; 5933 } 5934 return 0; 5935 } 5936 #endif 5937 5938 #ifdef ENABLE_LE_CENTRAL 5939 /** 5940 * @brief Set connection parameters for outgoing connections 5941 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5942 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5943 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5944 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5945 * @param conn_latency, default: 4 5946 * @param supervision_timeout (unit: 10ms), default: 720 ms 5947 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5948 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5949 */ 5950 5951 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5952 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5953 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5954 hci_stack->le_connection_scan_interval = conn_scan_interval; 5955 hci_stack->le_connection_scan_window = conn_scan_window; 5956 hci_stack->le_connection_interval_min = conn_interval_min; 5957 hci_stack->le_connection_interval_max = conn_interval_max; 5958 hci_stack->le_connection_latency = conn_latency; 5959 hci_stack->le_supervision_timeout = supervision_timeout; 5960 hci_stack->le_minimum_ce_length = min_ce_length; 5961 hci_stack->le_maximum_ce_length = max_ce_length; 5962 } 5963 #endif 5964 5965 /** 5966 * @brief Updates the connection parameters for a given LE connection 5967 * @param handle 5968 * @param conn_interval_min (unit: 1.25ms) 5969 * @param conn_interval_max (unit: 1.25ms) 5970 * @param conn_latency 5971 * @param supervision_timeout (unit: 10ms) 5972 * @return 0 if ok 5973 */ 5974 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5975 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5976 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5977 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5978 connection->le_conn_interval_min = conn_interval_min; 5979 connection->le_conn_interval_max = conn_interval_max; 5980 connection->le_conn_latency = conn_latency; 5981 connection->le_supervision_timeout = supervision_timeout; 5982 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5983 hci_run(); 5984 return 0; 5985 } 5986 5987 /** 5988 * @brief Request an update of the connection parameter for a given LE connection 5989 * @param handle 5990 * @param conn_interval_min (unit: 1.25ms) 5991 * @param conn_interval_max (unit: 1.25ms) 5992 * @param conn_latency 5993 * @param supervision_timeout (unit: 10ms) 5994 * @return 0 if ok 5995 */ 5996 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5997 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5998 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5999 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6000 connection->le_conn_interval_min = conn_interval_min; 6001 connection->le_conn_interval_max = conn_interval_max; 6002 connection->le_conn_latency = conn_latency; 6003 connection->le_supervision_timeout = supervision_timeout; 6004 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6005 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6006 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6007 return 0; 6008 } 6009 6010 #ifdef ENABLE_LE_PERIPHERAL 6011 6012 /** 6013 * @brief Set Advertisement Data 6014 * @param advertising_data_length 6015 * @param advertising_data (max 31 octets) 6016 * @note data is not copied, pointer has to stay valid 6017 */ 6018 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6019 hci_stack->le_advertisements_data_len = advertising_data_length; 6020 hci_stack->le_advertisements_data = advertising_data; 6021 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6022 hci_run(); 6023 } 6024 6025 /** 6026 * @brief Set Scan Response Data 6027 * @param advertising_data_length 6028 * @param advertising_data (max 31 octets) 6029 * @note data is not copied, pointer has to stay valid 6030 */ 6031 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6032 hci_stack->le_scan_response_data_len = scan_response_data_length; 6033 hci_stack->le_scan_response_data = scan_response_data; 6034 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6035 hci_run(); 6036 } 6037 6038 /** 6039 * @brief Set Advertisement Parameters 6040 * @param adv_int_min 6041 * @param adv_int_max 6042 * @param adv_type 6043 * @param direct_address_type 6044 * @param direct_address 6045 * @param channel_map 6046 * @param filter_policy 6047 * 6048 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6049 */ 6050 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6051 uint8_t direct_address_typ, bd_addr_t direct_address, 6052 uint8_t channel_map, uint8_t filter_policy) { 6053 6054 hci_stack->le_advertisements_interval_min = adv_int_min; 6055 hci_stack->le_advertisements_interval_max = adv_int_max; 6056 hci_stack->le_advertisements_type = adv_type; 6057 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6058 hci_stack->le_advertisements_channel_map = channel_map; 6059 hci_stack->le_advertisements_filter_policy = filter_policy; 6060 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6061 6); 6062 6063 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6064 hci_run(); 6065 } 6066 6067 /** 6068 * @brief Enable/Disable Advertisements 6069 * @param enabled 6070 */ 6071 void gap_advertisements_enable(int enabled){ 6072 hci_stack->le_advertisements_enabled = enabled != 0; 6073 hci_update_advertisements_enabled_for_current_roles(); 6074 hci_run(); 6075 } 6076 6077 #endif 6078 6079 void hci_le_set_own_address_type(uint8_t own_address_type){ 6080 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6081 if (own_address_type == hci_stack->le_own_addr_type) return; 6082 hci_stack->le_own_addr_type = own_address_type; 6083 6084 #ifdef ENABLE_LE_PERIPHERAL 6085 // update advertisement parameters, too 6086 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6087 hci_run(); 6088 #endif 6089 #ifdef ENABLE_LE_CENTRAL 6090 // note: we don't update scan parameters or modify ongoing connection attempts 6091 #endif 6092 } 6093 6094 void hci_le_random_address_set(const bd_addr_t random_address){ 6095 memcpy(hci_stack->le_random_address, random_address, 6); 6096 hci_stack->le_random_address_set = true; 6097 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6098 hci_run(); 6099 } 6100 6101 #endif 6102 6103 uint8_t gap_disconnect(hci_con_handle_t handle){ 6104 hci_connection_t * conn = hci_connection_for_handle(handle); 6105 if (!conn){ 6106 hci_emit_disconnection_complete(handle, 0); 6107 return 0; 6108 } 6109 // ignore if already disconnected 6110 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6111 return 0; 6112 } 6113 conn->state = SEND_DISCONNECT; 6114 hci_run(); 6115 return 0; 6116 } 6117 6118 int gap_read_rssi(hci_con_handle_t con_handle){ 6119 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6120 if (hci_connection == NULL) return 0; 6121 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6122 hci_run(); 6123 return 1; 6124 } 6125 6126 /** 6127 * @brief Get connection type 6128 * @param con_handle 6129 * @result connection_type 6130 */ 6131 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6132 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6133 if (!conn) return GAP_CONNECTION_INVALID; 6134 switch (conn->address_type){ 6135 case BD_ADDR_TYPE_LE_PUBLIC: 6136 case BD_ADDR_TYPE_LE_RANDOM: 6137 return GAP_CONNECTION_LE; 6138 case BD_ADDR_TYPE_SCO: 6139 return GAP_CONNECTION_SCO; 6140 case BD_ADDR_TYPE_ACL: 6141 return GAP_CONNECTION_ACL; 6142 default: 6143 return GAP_CONNECTION_INVALID; 6144 } 6145 } 6146 6147 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6148 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6149 if (!conn) return HCI_ROLE_INVALID; 6150 return (hci_role_t) conn->role; 6151 } 6152 6153 6154 #ifdef ENABLE_CLASSIC 6155 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6156 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6157 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6158 conn->request_role = role; 6159 hci_run(); 6160 return ERROR_CODE_SUCCESS; 6161 } 6162 #endif 6163 6164 #ifdef ENABLE_BLE 6165 6166 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){ 6167 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6168 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6169 6170 conn->le_phy_update_all_phys = all_phys; 6171 conn->le_phy_update_tx_phys = tx_phys; 6172 conn->le_phy_update_rx_phys = rx_phys; 6173 conn->le_phy_update_phy_options = phy_options; 6174 6175 hci_run(); 6176 6177 return 0; 6178 } 6179 6180 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6181 // check if already in list 6182 btstack_linked_list_iterator_t it; 6183 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6184 while (btstack_linked_list_iterator_has_next(&it)) { 6185 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6186 if (entry->address_type != address_type) { 6187 continue; 6188 } 6189 if (memcmp(entry->address, address, 6) != 0) { 6190 continue; 6191 } 6192 // disallow if already scheduled to add 6193 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6194 return ERROR_CODE_COMMAND_DISALLOWED; 6195 } 6196 // still on controller, but scheduled to remove -> re-add 6197 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6198 return ERROR_CODE_SUCCESS; 6199 } 6200 // alloc and add to list 6201 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6202 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6203 entry->address_type = address_type; 6204 (void)memcpy(entry->address, address, 6); 6205 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6206 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6207 return ERROR_CODE_SUCCESS; 6208 } 6209 6210 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6211 btstack_linked_list_iterator_t it; 6212 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6213 while (btstack_linked_list_iterator_has_next(&it)){ 6214 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6215 if (entry->address_type != address_type) { 6216 continue; 6217 } 6218 if (memcmp(entry->address, address, 6) != 0) { 6219 continue; 6220 } 6221 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6222 // remove from controller if already present 6223 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6224 } else { 6225 // directly remove entry from whitelist 6226 btstack_linked_list_iterator_remove(&it); 6227 btstack_memory_whitelist_entry_free(entry); 6228 } 6229 return ERROR_CODE_SUCCESS; 6230 } 6231 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6232 } 6233 6234 static void hci_whitelist_clear(void){ 6235 btstack_linked_list_iterator_t it; 6236 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6237 while (btstack_linked_list_iterator_has_next(&it)){ 6238 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6239 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6240 // remove from controller if already present 6241 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6242 continue; 6243 } 6244 // directly remove entry from whitelist 6245 btstack_linked_list_iterator_remove(&it); 6246 btstack_memory_whitelist_entry_free(entry); 6247 } 6248 } 6249 6250 // free all entries unconditionally 6251 static void hci_whitelist_free(void){ 6252 btstack_linked_list_iterator_t lit; 6253 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6254 while (btstack_linked_list_iterator_has_next(&lit)){ 6255 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6256 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6257 btstack_memory_whitelist_entry_free(entry); 6258 } 6259 } 6260 6261 /** 6262 * @brief Clear Whitelist 6263 * @return 0 if ok 6264 */ 6265 uint8_t gap_whitelist_clear(void){ 6266 hci_whitelist_clear(); 6267 hci_run(); 6268 return ERROR_CODE_SUCCESS; 6269 } 6270 6271 /** 6272 * @brief Add Device to Whitelist 6273 * @param address_typ 6274 * @param address 6275 * @return 0 if ok 6276 */ 6277 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6278 uint8_t status = hci_whitelist_add(address_type, address); 6279 if (status){ 6280 return status; 6281 } 6282 hci_run(); 6283 return ERROR_CODE_SUCCESS; 6284 } 6285 6286 /** 6287 * @brief Remove Device from Whitelist 6288 * @param address_typ 6289 * @param address 6290 * @return 0 if ok 6291 */ 6292 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6293 uint8_t status = hci_whitelist_remove(address_type, address); 6294 if (status){ 6295 return status; 6296 } 6297 hci_run(); 6298 return ERROR_CODE_SUCCESS; 6299 } 6300 6301 #ifdef ENABLE_LE_CENTRAL 6302 /** 6303 * @brief Connect with Whitelist 6304 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6305 * @return - if ok 6306 */ 6307 uint8_t gap_connect_with_whitelist(void){ 6308 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6309 return ERROR_CODE_COMMAND_DISALLOWED; 6310 } 6311 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6312 hci_run(); 6313 return ERROR_CODE_SUCCESS; 6314 } 6315 6316 /** 6317 * @brief Auto Connection Establishment - Start Connecting to device 6318 * @param address_typ 6319 * @param address 6320 * @return 0 if ok 6321 */ 6322 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6323 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6324 return ERROR_CODE_COMMAND_DISALLOWED; 6325 } 6326 6327 uint8_t status = hci_whitelist_add(address_type, address); 6328 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6329 return status; 6330 } 6331 6332 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6333 6334 hci_run(); 6335 return ERROR_CODE_SUCCESS; 6336 } 6337 6338 /** 6339 * @brief Auto Connection Establishment - Stop Connecting to device 6340 * @param address_typ 6341 * @param address 6342 * @return 0 if ok 6343 */ 6344 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6345 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6346 return ERROR_CODE_COMMAND_DISALLOWED; 6347 } 6348 6349 hci_whitelist_remove(address_type, address); 6350 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6351 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6352 } 6353 hci_run(); 6354 return 0; 6355 } 6356 6357 /** 6358 * @brief Auto Connection Establishment - Stop everything 6359 * @note Convenience function to stop all active auto connection attempts 6360 */ 6361 uint8_t gap_auto_connection_stop_all(void){ 6362 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6363 return ERROR_CODE_COMMAND_DISALLOWED; 6364 } 6365 hci_whitelist_clear(); 6366 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6367 hci_run(); 6368 return ERROR_CODE_SUCCESS; 6369 } 6370 6371 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6372 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6373 if (!conn) return 0; 6374 return conn->le_connection_interval; 6375 } 6376 #endif 6377 #endif 6378 6379 #ifdef ENABLE_CLASSIC 6380 /** 6381 * @brief Set Extended Inquiry Response data 6382 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6383 * @note has to be done before stack starts up 6384 */ 6385 void gap_set_extended_inquiry_response(const uint8_t * data){ 6386 hci_stack->eir_data = data; 6387 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6388 hci_run(); 6389 } 6390 6391 /** 6392 * @brief Start GAP Classic Inquiry 6393 * @param duration in 1.28s units 6394 * @return 0 if ok 6395 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6396 */ 6397 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6398 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6399 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6400 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6401 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6402 } 6403 hci_stack->inquiry_state = duration_in_1280ms_units; 6404 hci_run(); 6405 return 0; 6406 } 6407 6408 /** 6409 * @brief Stop GAP Classic Inquiry 6410 * @return 0 if ok 6411 */ 6412 int gap_inquiry_stop(void){ 6413 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6414 // emit inquiry complete event, before it even started 6415 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6416 hci_emit_event(event, sizeof(event), 1); 6417 return 0; 6418 } 6419 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6420 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6421 hci_run(); 6422 return 0; 6423 } 6424 6425 void gap_inquiry_set_lap(uint32_t lap){ 6426 hci_stack->inquiry_lap = lap; 6427 } 6428 6429 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6430 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6431 hci_stack->inquiry_scan_window = inquiry_scan_window; 6432 hci_stack->gap_tasks |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6433 hci_run(); 6434 } 6435 6436 6437 /** 6438 * @brief Remote Name Request 6439 * @param addr 6440 * @param page_scan_repetition_mode 6441 * @param clock_offset only used when bit 15 is set 6442 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6443 */ 6444 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6445 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6446 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6447 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6448 hci_stack->remote_name_clock_offset = clock_offset; 6449 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6450 hci_run(); 6451 return 0; 6452 } 6453 6454 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6455 hci_stack->gap_pairing_state = state; 6456 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6457 hci_run(); 6458 return 0; 6459 } 6460 6461 /** 6462 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6463 * @param addr 6464 * @param pin_data 6465 * @param pin_len 6466 * @return 0 if ok 6467 */ 6468 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6469 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6470 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6471 hci_stack->gap_pairing_pin_len = pin_len; 6472 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6473 } 6474 6475 /** 6476 * @brief Legacy Pairing Pin Code Response 6477 * @param addr 6478 * @param pin 6479 * @return 0 if ok 6480 */ 6481 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6482 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6483 } 6484 6485 /** 6486 * @brief Abort Legacy Pairing 6487 * @param addr 6488 * @param pin 6489 * @return 0 if ok 6490 */ 6491 int gap_pin_code_negative(bd_addr_t addr){ 6492 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6493 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6494 } 6495 6496 /** 6497 * @brief SSP Passkey Response 6498 * @param addr 6499 * @param passkey 6500 * @return 0 if ok 6501 */ 6502 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6503 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6504 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6505 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6506 } 6507 6508 /** 6509 * @brief Abort SSP Passkey Entry/Pairing 6510 * @param addr 6511 * @param pin 6512 * @return 0 if ok 6513 */ 6514 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6515 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6516 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6517 } 6518 6519 /** 6520 * @brief Accept SSP Numeric Comparison 6521 * @param addr 6522 * @param passkey 6523 * @return 0 if ok 6524 */ 6525 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6526 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6527 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6528 } 6529 6530 /** 6531 * @brief Abort SSP Numeric Comparison/Pairing 6532 * @param addr 6533 * @param pin 6534 * @return 0 if ok 6535 */ 6536 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6537 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6538 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6539 } 6540 6541 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6542 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6543 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6544 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6545 connectionSetAuthenticationFlags(conn, flag); 6546 hci_run(); 6547 return ERROR_CODE_SUCCESS; 6548 } 6549 #endif 6550 6551 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6552 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6553 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6554 } 6555 6556 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6557 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6558 } 6559 #endif 6560 6561 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6562 /** 6563 * @brief Report Remote OOB Data 6564 * @param bd_addr 6565 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6566 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6567 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6568 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6569 */ 6570 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){ 6571 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6572 if (connection == NULL) { 6573 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6574 } 6575 connection->classic_oob_c_192 = c_192; 6576 connection->classic_oob_r_192 = r_192; 6577 6578 // ignore P-256 if not supported by us 6579 if (hci_stack->secure_connections_active){ 6580 connection->classic_oob_c_256 = c_256; 6581 connection->classic_oob_r_256 = r_256; 6582 } 6583 6584 return ERROR_CODE_SUCCESS; 6585 } 6586 /** 6587 * @brief Generate new OOB data 6588 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6589 */ 6590 void gap_ssp_generate_oob_data(void){ 6591 hci_stack->classic_read_local_oob_data = true; 6592 hci_run(); 6593 } 6594 6595 #endif 6596 6597 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6598 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6599 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6600 if (connection == NULL) { 6601 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6602 } 6603 6604 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6605 connection->link_key_type = type; 6606 6607 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6608 } 6609 6610 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6611 /** 6612 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6613 * @param inquiry_mode see bluetooth_defines.h 6614 */ 6615 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6616 hci_stack->inquiry_mode = inquiry_mode; 6617 } 6618 6619 /** 6620 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6621 */ 6622 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6623 hci_stack->sco_voice_setting = voice_setting; 6624 } 6625 6626 /** 6627 * @brief Get SCO Voice Setting 6628 * @return current voice setting 6629 */ 6630 uint16_t hci_get_sco_voice_setting(void){ 6631 return hci_stack->sco_voice_setting; 6632 } 6633 6634 static int hci_have_usb_transport(void){ 6635 if (!hci_stack->hci_transport) return 0; 6636 const char * transport_name = hci_stack->hci_transport->name; 6637 if (!transport_name) return 0; 6638 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6639 } 6640 6641 /** @brief Get SCO packet length for current SCO Voice setting 6642 * @note Using SCO packets of the exact length is required for USB transfer 6643 * @return Length of SCO packets in bytes (not audio frames) 6644 */ 6645 uint16_t hci_get_sco_packet_length(void){ 6646 uint16_t sco_packet_length = 0; 6647 6648 #ifdef ENABLE_SCO_OVER_HCI 6649 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6650 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6651 6652 if (hci_have_usb_transport()){ 6653 // see Core Spec for H2 USB Transfer. 6654 // 3 byte SCO header + 24 bytes per connection 6655 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6656 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6657 } else { 6658 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6659 sco_packet_length = 3 + 60 * multiplier; 6660 // assert that it still fits inside an SCO buffer 6661 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6662 sco_packet_length = 3 + 60; 6663 } 6664 } 6665 #endif 6666 6667 #ifdef HAVE_SCO_TRANSPORT 6668 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6669 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6670 sco_packet_length = 3 + 60 * multiplier; 6671 #endif 6672 return sco_packet_length; 6673 } 6674 6675 /** 6676 * @brief Sets the master/slave policy 6677 * @param policy (0: attempt to become master, 1: let connecting device decide) 6678 */ 6679 void hci_set_master_slave_policy(uint8_t policy){ 6680 hci_stack->master_slave_policy = policy; 6681 } 6682 6683 #endif 6684 6685 HCI_STATE hci_get_state(void){ 6686 return hci_stack->state; 6687 } 6688 6689 #ifdef ENABLE_CLASSIC 6690 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6691 hci_stack->gap_classic_accept_callback = accept_callback; 6692 } 6693 #endif 6694 6695 /** 6696 * @brief Set callback for Bluetooth Hardware Error 6697 */ 6698 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6699 hci_stack->hardware_error_callback = fn; 6700 } 6701 6702 void hci_disconnect_all(void){ 6703 btstack_linked_list_iterator_t it; 6704 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6705 while (btstack_linked_list_iterator_has_next(&it)){ 6706 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6707 if (con->state == SENT_DISCONNECT) continue; 6708 con->state = SEND_DISCONNECT; 6709 } 6710 hci_run(); 6711 } 6712 6713 uint16_t hci_get_manufacturer(void){ 6714 return hci_stack->manufacturer; 6715 } 6716 6717 #ifdef ENABLE_BLE 6718 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6719 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6720 if (!hci_con) return NULL; 6721 return &hci_con->sm_connection; 6722 } 6723 6724 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6725 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6726 #endif 6727 6728 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6729 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6730 if (hci_connection == NULL) return 0; 6731 if (hci_is_le_connection(hci_connection)){ 6732 #ifdef ENABLE_BLE 6733 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6734 if (sm_conn->sm_connection_encrypted) { 6735 return sm_conn->sm_actual_encryption_key_size; 6736 } 6737 #endif 6738 } else { 6739 #ifdef ENABLE_CLASSIC 6740 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6741 return hci_connection->encryption_key_size; 6742 } 6743 #endif 6744 } 6745 return 0; 6746 } 6747 6748 int gap_authenticated(hci_con_handle_t con_handle){ 6749 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6750 if (hci_connection == NULL) return 0; 6751 6752 switch (hci_connection->address_type){ 6753 #ifdef ENABLE_BLE 6754 case BD_ADDR_TYPE_LE_PUBLIC: 6755 case BD_ADDR_TYPE_LE_RANDOM: 6756 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6757 return hci_connection->sm_connection.sm_connection_authenticated; 6758 #endif 6759 #ifdef ENABLE_CLASSIC 6760 case BD_ADDR_TYPE_SCO: 6761 case BD_ADDR_TYPE_ACL: 6762 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6763 #endif 6764 default: 6765 return 0; 6766 } 6767 } 6768 6769 int gap_secure_connection(hci_con_handle_t con_handle){ 6770 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6771 if (hci_connection == NULL) return 0; 6772 6773 switch (hci_connection->address_type){ 6774 #ifdef ENABLE_BLE 6775 case BD_ADDR_TYPE_LE_PUBLIC: 6776 case BD_ADDR_TYPE_LE_RANDOM: 6777 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6778 return hci_connection->sm_connection.sm_connection_sc; 6779 #endif 6780 #ifdef ENABLE_CLASSIC 6781 case BD_ADDR_TYPE_SCO: 6782 case BD_ADDR_TYPE_ACL: 6783 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6784 #endif 6785 default: 6786 return 0; 6787 } 6788 } 6789 6790 bool gap_bonded(hci_con_handle_t con_handle){ 6791 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6792 if (hci_connection == NULL) return 0; 6793 6794 #ifdef ENABLE_CLASSIC 6795 link_key_t link_key; 6796 link_key_type_t link_key_type; 6797 #endif 6798 switch (hci_connection->address_type){ 6799 #ifdef ENABLE_BLE 6800 case BD_ADDR_TYPE_LE_PUBLIC: 6801 case BD_ADDR_TYPE_LE_RANDOM: 6802 return hci_connection->sm_connection.sm_le_db_index >= 0; 6803 #endif 6804 #ifdef ENABLE_CLASSIC 6805 case BD_ADDR_TYPE_SCO: 6806 case BD_ADDR_TYPE_ACL: 6807 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6808 #endif 6809 default: 6810 return false; 6811 } 6812 } 6813 6814 #ifdef ENABLE_BLE 6815 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6816 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6817 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6818 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6819 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6820 return sm_conn->sm_connection_authorization_state; 6821 } 6822 #endif 6823 6824 #ifdef ENABLE_CLASSIC 6825 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){ 6826 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6827 if (!conn) return GAP_CONNECTION_INVALID; 6828 conn->sniff_min_interval = sniff_min_interval; 6829 conn->sniff_max_interval = sniff_max_interval; 6830 conn->sniff_attempt = sniff_attempt; 6831 conn->sniff_timeout = sniff_timeout; 6832 hci_run(); 6833 return 0; 6834 } 6835 6836 /** 6837 * @brief Exit Sniff mode 6838 * @param con_handle 6839 @ @return 0 if ok 6840 */ 6841 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6842 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6843 if (!conn) return GAP_CONNECTION_INVALID; 6844 conn->sniff_min_interval = 0xffff; 6845 hci_run(); 6846 return 0; 6847 } 6848 6849 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){ 6850 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6851 if (!conn) return GAP_CONNECTION_INVALID; 6852 conn->sniff_subrating_max_latency = max_latency; 6853 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6854 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6855 hci_run(); 6856 return ERROR_CODE_SUCCESS; 6857 } 6858 6859 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){ 6860 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6861 if (!conn) return GAP_CONNECTION_INVALID; 6862 conn->qos_service_type = service_type; 6863 conn->qos_token_rate = token_rate; 6864 conn->qos_peak_bandwidth = peak_bandwidth; 6865 conn->qos_latency = latency; 6866 conn->qos_delay_variation = delay_variation; 6867 hci_run(); 6868 return ERROR_CODE_SUCCESS; 6869 } 6870 6871 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6872 hci_stack->new_page_scan_interval = page_scan_interval; 6873 hci_stack->new_page_scan_window = page_scan_window; 6874 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6875 hci_run(); 6876 } 6877 6878 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6879 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6880 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6881 hci_run(); 6882 } 6883 6884 void gap_set_page_timeout(uint16_t page_timeout){ 6885 hci_stack->page_timeout = page_timeout; 6886 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_TIMEOUT; 6887 hci_run(); 6888 } 6889 6890 #endif 6891 6892 void hci_halting_defer(void){ 6893 if (hci_stack->state != HCI_STATE_HALTING) return; 6894 switch (hci_stack->substate){ 6895 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6896 case HCI_HALTING_CLOSE: 6897 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6898 break; 6899 default: 6900 break; 6901 } 6902 } 6903 6904 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6905 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6906 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6907 if (le_device_db_index >= le_device_db_max_count()) return; 6908 uint8_t offset = le_device_db_index >> 3; 6909 uint8_t mask = 1 << (le_device_db_index & 7); 6910 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6911 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6912 // note: go back to remove entries, otherwise, a remove + add will skip the add 6913 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6914 } 6915 } 6916 6917 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6918 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6919 if (le_device_db_index >= le_device_db_max_count()) return; 6920 uint8_t offset = le_device_db_index >> 3; 6921 uint8_t mask = 1 << (le_device_db_index & 7); 6922 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6923 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6924 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6925 } 6926 } 6927 6928 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6929 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6930 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6931 } 6932 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6933 // restart le resolving list update 6934 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6935 } 6936 return ERROR_CODE_SUCCESS; 6937 } 6938 #endif 6939 6940 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6941 void hci_setup_test_connections_fuzz(void){ 6942 hci_connection_t * conn; 6943 6944 // default address: 66:55:44:33:00:01 6945 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6946 6947 // setup Controller info 6948 hci_stack->num_cmd_packets = 255; 6949 hci_stack->acl_packets_total_num = 255; 6950 6951 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6952 addr[5] = 0x01; 6953 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6954 conn->con_handle = addr[5]; 6955 conn->role = HCI_ROLE_SLAVE; 6956 conn->state = RECEIVED_CONNECTION_REQUEST; 6957 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6958 6959 // setup incoming Classic SCO connection with con handle 0x0002 6960 addr[5] = 0x02; 6961 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6962 conn->con_handle = addr[5]; 6963 conn->role = HCI_ROLE_SLAVE; 6964 conn->state = RECEIVED_CONNECTION_REQUEST; 6965 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6966 6967 // setup ready Classic ACL connection with con handle 0x0003 6968 addr[5] = 0x03; 6969 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6970 conn->con_handle = addr[5]; 6971 conn->role = HCI_ROLE_SLAVE; 6972 conn->state = OPEN; 6973 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6974 6975 // setup ready Classic SCO connection with con handle 0x0004 6976 addr[5] = 0x04; 6977 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6978 conn->con_handle = addr[5]; 6979 conn->role = HCI_ROLE_SLAVE; 6980 conn->state = OPEN; 6981 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6982 6983 // setup ready LE ACL connection with con handle 0x005 and public address 6984 addr[5] = 0x05; 6985 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6986 conn->con_handle = addr[5]; 6987 conn->role = HCI_ROLE_SLAVE; 6988 conn->state = OPEN; 6989 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6990 conn->sm_connection.sm_connection_encrypted = 1; 6991 } 6992 6993 void hci_free_connections_fuzz(void){ 6994 btstack_linked_list_iterator_t it; 6995 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6996 while (btstack_linked_list_iterator_has_next(&it)){ 6997 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6998 btstack_linked_list_iterator_remove(&it); 6999 btstack_memory_hci_connection_free(con); 7000 } 7001 } 7002 void hci_simulate_working_fuzz(void){ 7003 hci_init_done(); 7004 hci_stack->num_cmd_packets = 255; 7005 } 7006 #endif 7007