1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_emit_transport_packet_sent(void); 156 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 157 static void hci_emit_nr_connections_changed(void); 158 static void hci_emit_hci_open_failed(void); 159 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 160 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 161 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 162 static void hci_run(void); 163 static int hci_is_le_connection(hci_connection_t * connection); 164 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 static void hci_init_done(void){ 1427 // done. tell the app 1428 log_info("hci_init_done -> HCI_STATE_WORKING"); 1429 hci_stack->state = HCI_STATE_WORKING; 1430 hci_emit_state(); 1431 } 1432 1433 // assumption: hci_can_send_command_packet_now() == true 1434 static void hci_initializing_run(void){ 1435 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1436 1437 #ifndef HAVE_HOST_CONTROLLER_API 1438 bool need_baud_change = hci_stack->config 1439 && hci_stack->chipset 1440 && hci_stack->chipset->set_baudrate_command 1441 && hci_stack->hci_transport->set_baudrate 1442 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1443 #endif 1444 1445 switch (hci_stack->substate){ 1446 case HCI_INIT_SEND_RESET: 1447 hci_state_reset(); 1448 1449 #ifndef HAVE_HOST_CONTROLLER_API 1450 // prepare reset if command complete not received in 100ms 1451 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1452 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1453 btstack_run_loop_add_timer(&hci_stack->timeout); 1454 #endif 1455 // send command 1456 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1457 hci_send_cmd(&hci_reset); 1458 break; 1459 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1460 hci_send_cmd(&hci_read_local_version_information); 1461 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1462 break; 1463 1464 #ifndef HAVE_HOST_CONTROLLER_API 1465 case HCI_INIT_SEND_READ_LOCAL_NAME: 1466 hci_send_cmd(&hci_read_local_name); 1467 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1468 break; 1469 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1470 hci_state_reset(); 1471 // prepare reset if command complete not received in 100ms 1472 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1473 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1474 btstack_run_loop_add_timer(&hci_stack->timeout); 1475 // send command 1476 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1477 hci_send_cmd(&hci_reset); 1478 break; 1479 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1480 hci_state_reset(); 1481 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1482 hci_send_cmd(&hci_reset); 1483 break; 1484 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1485 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1486 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1487 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1488 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1489 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1490 break; 1491 } 1492 case HCI_INIT_SET_BD_ADDR: 1493 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1494 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1495 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1496 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1497 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1498 break; 1499 case HCI_INIT_SEND_BAUD_CHANGE: 1500 if (need_baud_change) { 1501 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1502 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1503 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1504 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1505 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1506 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1507 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1508 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1509 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1510 btstack_run_loop_add_timer(&hci_stack->timeout); 1511 } 1512 break; 1513 } 1514 1515 /* fall through */ 1516 1517 case HCI_INIT_CUSTOM_INIT: 1518 // Custom initialization 1519 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1520 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1521 bool send_cmd = false; 1522 switch (hci_stack->chipset_result){ 1523 case BTSTACK_CHIPSET_VALID_COMMAND: 1524 send_cmd = true; 1525 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1526 break; 1527 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1528 send_cmd = true; 1529 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1530 log_info("CSR Warm Boot"); 1531 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1532 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1533 btstack_run_loop_add_timer(&hci_stack->timeout); 1534 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1535 && hci_stack->config 1536 && hci_stack->chipset 1537 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1538 && hci_stack->hci_transport->set_baudrate 1539 && hci_transport_uart_get_main_baud_rate()){ 1540 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1541 } else { 1542 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1543 } 1544 break; 1545 default: 1546 break; 1547 } 1548 1549 if (send_cmd){ 1550 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1551 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1552 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1553 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1554 break; 1555 } 1556 log_info("Init script done"); 1557 1558 // Init script download on Broadcom chipsets causes: 1559 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1560 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1561 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1562 1563 // - baud rate to reset, restore UART baud rate if needed 1564 if (need_baud_change) { 1565 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1566 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1567 hci_stack->hci_transport->set_baudrate(baud_rate); 1568 } 1569 1570 uint16_t bcm_delay_ms = 300; 1571 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1572 // -> Work around: wait here. 1573 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1574 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1575 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1576 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1577 btstack_run_loop_add_timer(&hci_stack->timeout); 1578 break; 1579 } 1580 } 1581 /* fall through */ 1582 #endif 1583 1584 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1585 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1586 hci_send_cmd(&hci_read_local_supported_commands); 1587 break; 1588 case HCI_INIT_READ_BD_ADDR: 1589 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1590 hci_send_cmd(&hci_read_bd_addr); 1591 break; 1592 case HCI_INIT_READ_BUFFER_SIZE: 1593 // only read buffer size if supported 1594 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1595 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1596 hci_send_cmd(&hci_read_buffer_size); 1597 break; 1598 } 1599 /* fall through */ 1600 1601 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1602 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1603 hci_send_cmd(&hci_read_local_supported_features); 1604 break; 1605 1606 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1607 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1608 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1609 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1610 break; 1611 case HCI_INIT_HOST_BUFFER_SIZE: 1612 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1613 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1614 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1615 break; 1616 #endif 1617 1618 case HCI_INIT_SET_EVENT_MASK: 1619 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1620 if (hci_le_supported()){ 1621 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1622 } else { 1623 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1624 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1625 } 1626 break; 1627 1628 #ifdef ENABLE_CLASSIC 1629 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1630 if (hci_classic_supported() && gap_ssp_supported()){ 1631 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1632 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1633 break; 1634 } 1635 /* fall through */ 1636 1637 case HCI_INIT_WRITE_INQUIRY_MODE: 1638 if (hci_classic_supported()){ 1639 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1640 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1641 break; 1642 } 1643 /* fall through */ 1644 1645 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1646 // skip write secure connections host support if not supported or disabled 1647 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1648 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1649 hci_stack->secure_connections_active = true; 1650 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1651 break; 1652 } 1653 /* fall through */ 1654 1655 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1656 if (hci_classic_supported()){ 1657 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1658 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1659 break; 1660 } 1661 /* fall through */ 1662 1663 #ifdef ENABLE_SCO_OVER_HCI 1664 // only sent if ENABLE_SCO_OVER_HCI is defined 1665 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1666 // skip write synchronous flow control if not supported 1667 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1668 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1669 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1670 break; 1671 } 1672 /* fall through */ 1673 1674 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1675 // skip write default erroneous data reporting if not supported 1676 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1677 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1678 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1679 break; 1680 } 1681 /* fall through */ 1682 #endif 1683 1684 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1685 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1686 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1687 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1688 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1689 #ifdef ENABLE_SCO_OVER_HCI 1690 log_info("BCM: Route SCO data via HCI transport"); 1691 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1692 #endif 1693 #ifdef ENABLE_SCO_OVER_PCM 1694 log_info("BCM: Route SCO data via PCM interface"); 1695 #ifdef ENABLE_BCM_PCM_WBS 1696 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1697 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1698 #else 1699 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1700 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1701 #endif 1702 #endif 1703 break; 1704 } 1705 /* fall through */ 1706 #endif 1707 1708 #ifdef ENABLE_SCO_OVER_PCM 1709 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1710 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1711 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1712 log_info("BCM: Config PCM interface for I2S"); 1713 #ifdef ENABLE_BCM_PCM_WBS 1714 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1715 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1716 #else 1717 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1718 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1719 #endif 1720 break; 1721 } 1722 /* fall through */ 1723 #endif 1724 #endif 1725 1726 #ifdef ENABLE_BLE 1727 // LE INIT 1728 case HCI_INIT_LE_READ_BUFFER_SIZE: 1729 if (hci_le_supported()){ 1730 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1731 hci_send_cmd(&hci_le_read_buffer_size); 1732 break; 1733 } 1734 /* fall through */ 1735 1736 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1737 // skip write le host if not supported (e.g. on LE only EM9301) 1738 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1739 // LE Supported Host = 1, Simultaneous Host = 0 1740 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1741 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1742 break; 1743 } 1744 /* fall through */ 1745 1746 case HCI_INIT_LE_SET_EVENT_MASK: 1747 if (hci_le_supported()){ 1748 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1749 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1750 break; 1751 } 1752 /* fall through */ 1753 1754 #endif 1755 1756 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1757 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1758 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1759 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1760 hci_send_cmd(&hci_le_read_maximum_data_length); 1761 break; 1762 } 1763 /* fall through */ 1764 1765 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1766 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1767 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1768 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1769 break; 1770 } 1771 /* fall through */ 1772 #endif 1773 1774 #ifdef ENABLE_LE_CENTRAL 1775 case HCI_INIT_READ_WHITE_LIST_SIZE: 1776 if (hci_le_supported()){ 1777 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1778 hci_send_cmd(&hci_le_read_white_list_size); 1779 break; 1780 } 1781 /* fall through */ 1782 1783 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1784 if (hci_le_supported()){ 1785 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1786 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1787 break; 1788 } 1789 /* fall through */ 1790 #endif 1791 1792 case HCI_INIT_DONE: 1793 hci_stack->substate = HCI_INIT_DONE; 1794 #ifdef ENABLE_CLASSIC 1795 // init sequence complete, check if GAP Tasks are completed 1796 if (hci_stack->gap_tasks != 0) { 1797 hci_run_gap_tasks_classic(); 1798 break; 1799 } 1800 #endif 1801 hci_init_done(); 1802 break; 1803 1804 default: 1805 return; 1806 } 1807 } 1808 1809 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1810 bool command_completed = false; 1811 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1812 uint16_t opcode = little_endian_read_16(packet,3); 1813 if (opcode == hci_stack->last_cmd_opcode){ 1814 command_completed = true; 1815 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1816 } else { 1817 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1818 } 1819 } 1820 1821 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1822 uint8_t status = packet[2]; 1823 uint16_t opcode = little_endian_read_16(packet,4); 1824 if (opcode == hci_stack->last_cmd_opcode){ 1825 if (status){ 1826 command_completed = true; 1827 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1828 } else { 1829 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1830 } 1831 } else { 1832 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1833 } 1834 } 1835 #ifndef HAVE_HOST_CONTROLLER_API 1836 // Vendor == CSR 1837 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1838 // TODO: track actual command 1839 command_completed = true; 1840 } 1841 1842 // Vendor == Toshiba 1843 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1844 // TODO: track actual command 1845 command_completed = true; 1846 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1847 hci_stack->num_cmd_packets = 1; 1848 } 1849 #endif 1850 1851 return command_completed; 1852 } 1853 1854 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1855 1856 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1857 1858 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1859 1860 #ifndef HAVE_HOST_CONTROLLER_API 1861 1862 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1863 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1864 // 1865 // HCI Reset 1866 // Timeout 100 ms 1867 // HCI Reset 1868 // Command Complete Reset 1869 // HCI Read Local Version Information 1870 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1871 // hang... 1872 // 1873 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1874 if (!command_completed 1875 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1876 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1877 1878 uint16_t opcode = little_endian_read_16(packet,3); 1879 if (opcode == hci_reset.opcode){ 1880 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1881 return; 1882 } 1883 } 1884 1885 // CSR & H5 1886 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1887 if (!command_completed 1888 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1889 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1890 1891 uint16_t opcode = little_endian_read_16(packet,3); 1892 if (opcode == hci_reset.opcode){ 1893 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1894 return; 1895 } 1896 } 1897 1898 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1899 // fix: Correct substate and behave as command below 1900 if (command_completed){ 1901 switch (hci_stack->substate){ 1902 case HCI_INIT_SEND_RESET: 1903 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1904 break; 1905 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1906 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1907 break; 1908 default: 1909 break; 1910 } 1911 } 1912 1913 #endif 1914 1915 if (!command_completed) return; 1916 1917 bool need_baud_change = false; 1918 bool need_addr_change = false; 1919 1920 #ifndef HAVE_HOST_CONTROLLER_API 1921 need_baud_change = hci_stack->config 1922 && hci_stack->chipset 1923 && hci_stack->chipset->set_baudrate_command 1924 && hci_stack->hci_transport->set_baudrate 1925 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1926 1927 need_addr_change = hci_stack->custom_bd_addr_set 1928 && hci_stack->chipset 1929 && hci_stack->chipset->set_bd_addr_command; 1930 #endif 1931 1932 switch(hci_stack->substate){ 1933 1934 #ifndef HAVE_HOST_CONTROLLER_API 1935 case HCI_INIT_SEND_RESET: 1936 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1937 // fix: just correct substate and behave as command below 1938 1939 /* fall through */ 1940 #endif 1941 1942 case HCI_INIT_W4_SEND_RESET: 1943 btstack_run_loop_remove_timer(&hci_stack->timeout); 1944 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1945 return; 1946 1947 #ifndef HAVE_HOST_CONTROLLER_API 1948 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1949 // for STLC2500D, baud rate change already happened. 1950 // for others, baud rate gets changed now 1951 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1952 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1953 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1954 hci_stack->hci_transport->set_baudrate(baud_rate); 1955 } 1956 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1957 return; 1958 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1959 btstack_run_loop_remove_timer(&hci_stack->timeout); 1960 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1961 return; 1962 case HCI_INIT_W4_CUSTOM_INIT: 1963 // repeat custom init 1964 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1965 return; 1966 #endif 1967 1968 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1969 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1970 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1971 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1972 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1973 return; 1974 } 1975 if (need_addr_change){ 1976 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1977 return; 1978 } 1979 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1980 return; 1981 #ifndef HAVE_HOST_CONTROLLER_API 1982 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1983 if (need_baud_change){ 1984 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1985 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1986 hci_stack->hci_transport->set_baudrate(baud_rate); 1987 } 1988 if (need_addr_change){ 1989 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1990 return; 1991 } 1992 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1993 return; 1994 case HCI_INIT_W4_SET_BD_ADDR: 1995 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1996 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1997 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1998 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1999 return; 2000 } 2001 // skipping st warm boot 2002 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2003 return; 2004 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2005 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2006 return; 2007 #endif 2008 2009 case HCI_INIT_DONE: 2010 // set state if we came here by fall through 2011 hci_stack->substate = HCI_INIT_DONE; 2012 return; 2013 2014 default: 2015 break; 2016 } 2017 hci_initializing_next_state(); 2018 } 2019 2020 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2021 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2022 bd_addr_t bd_address; 2023 (void)memcpy(&bd_address, conn->address, 6); 2024 2025 #ifdef ENABLE_CLASSIC 2026 // cache needed data 2027 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2028 #endif 2029 2030 // connection failed, remove entry 2031 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2032 btstack_memory_hci_connection_free( conn ); 2033 2034 #ifdef ENABLE_CLASSIC 2035 // notify client if dedicated bonding 2036 if (notify_dedicated_bonding_failed){ 2037 log_info("hci notify_dedicated_bonding_failed"); 2038 hci_emit_dedicated_bonding_result(bd_address, status); 2039 } 2040 2041 // if authentication error, also delete link key 2042 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2043 gap_drop_link_key_for_bd_addr(bd_address); 2044 } 2045 #else 2046 UNUSED(status); 2047 #endif 2048 } 2049 2050 #ifdef ENABLE_CLASSIC 2051 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2052 // SSP Controller 2053 if (features[6] & (1 << 3)){ 2054 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2055 } 2056 // eSCO 2057 if (features[3] & (1<<7)){ 2058 conn->remote_supported_features[0] |= 1; 2059 } 2060 // Extended features 2061 if (features[7] & (1<<7)){ 2062 conn->remote_supported_features[0] |= 2; 2063 } 2064 } 2065 2066 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2067 // SSP Host 2068 if (features[0] & (1 << 0)){ 2069 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2070 } 2071 // SC Host 2072 if (features[0] & (1 << 3)){ 2073 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2074 } 2075 } 2076 2077 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2078 // SC Controller 2079 if (features[1] & (1 << 0)){ 2080 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2081 } 2082 } 2083 2084 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2085 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2086 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2087 if (conn->bonding_flags & BONDING_DEDICATED){ 2088 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2089 } 2090 } 2091 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2092 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2093 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2094 } 2095 2096 #endif 2097 2098 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2099 // handle BT initialization 2100 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2101 hci_initializing_event_handler(packet, size); 2102 } 2103 2104 // help with BT sleep 2105 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2106 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2107 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2108 hci_initializing_next_state(); 2109 } 2110 } 2111 2112 #ifdef ENABLE_CLASSIC 2113 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2114 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2115 conn->encryption_key_size = encryption_key_size; 2116 2117 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2118 conn->requested_security_level = LEVEL_0; 2119 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2120 return; 2121 } 2122 2123 // Request remote features if not already done 2124 if ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) == 0) { 2125 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2126 } 2127 2128 // Request Authentication if not already done 2129 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2130 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2131 } 2132 #endif 2133 2134 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2135 UNUSED(size); 2136 2137 uint16_t manufacturer; 2138 #ifdef ENABLE_CLASSIC 2139 hci_con_handle_t handle; 2140 hci_connection_t * conn; 2141 uint8_t status; 2142 #endif 2143 // get num cmd packets - limit to 1 to reduce complexity 2144 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2145 2146 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2147 switch (opcode){ 2148 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2149 if (packet[5]) break; 2150 // terminate, name 248 chars 2151 packet[6+248] = 0; 2152 log_info("local name: %s", &packet[6]); 2153 break; 2154 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2155 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2156 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2157 uint16_t acl_len = little_endian_read_16(packet, 6); 2158 uint16_t sco_len = packet[8]; 2159 2160 // determine usable ACL/SCO payload size 2161 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2162 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2163 2164 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2165 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2166 2167 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2168 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2169 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2170 } 2171 break; 2172 case HCI_OPCODE_HCI_READ_RSSI: 2173 if (packet[5] == ERROR_CODE_SUCCESS){ 2174 uint8_t event[5]; 2175 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2176 event[1] = 3; 2177 (void)memcpy(&event[2], &packet[6], 3); 2178 hci_emit_event(event, sizeof(event), 1); 2179 } 2180 break; 2181 #ifdef ENABLE_BLE 2182 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2183 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2184 hci_stack->le_acl_packets_total_num = packet[8]; 2185 // determine usable ACL payload size 2186 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2187 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2188 } 2189 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2190 break; 2191 #endif 2192 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2193 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2194 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2195 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2196 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); 2197 break; 2198 #endif 2199 #ifdef ENABLE_LE_CENTRAL 2200 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2201 hci_stack->le_whitelist_capacity = packet[6]; 2202 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2203 break; 2204 #endif 2205 case HCI_OPCODE_HCI_READ_BD_ADDR: 2206 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2207 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)); 2208 #ifdef ENABLE_CLASSIC 2209 if (hci_stack->link_key_db){ 2210 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2211 } 2212 #endif 2213 break; 2214 #ifdef ENABLE_CLASSIC 2215 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2216 hci_emit_discoverable_enabled(hci_stack->discoverable); 2217 break; 2218 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2219 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2220 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2221 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2222 hci_emit_event(event, sizeof(event), 1); 2223 } 2224 break; 2225 #endif 2226 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2227 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2228 2229 #ifdef ENABLE_CLASSIC 2230 // determine usable ACL packet types based on host buffer size and supported features 2231 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2232 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2233 #endif 2234 // Classic/LE 2235 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2236 break; 2237 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2238 manufacturer = little_endian_read_16(packet, 10); 2239 // map Cypress to Broadcom 2240 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2241 log_info("Treat Cypress as Broadcom"); 2242 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2243 little_endian_store_16(packet, 10, manufacturer); 2244 } 2245 hci_stack->manufacturer = manufacturer; 2246 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2247 break; 2248 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2249 hci_stack->local_supported_commands[0] = 2250 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2251 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2252 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2253 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2254 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2255 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2256 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2257 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2258 hci_stack->local_supported_commands[1] = 2259 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2260 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2261 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2262 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2263 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2264 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2265 break; 2266 #ifdef ENABLE_CLASSIC 2267 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2268 if (packet[5]) return; 2269 hci_stack->synchronous_flow_control_enabled = 1; 2270 break; 2271 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2272 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2273 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2274 conn = hci_connection_for_handle(handle); 2275 if (conn != NULL) { 2276 uint8_t key_size = 0; 2277 if (status == 0){ 2278 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2279 log_info("Handle %04x key Size: %u", handle, key_size); 2280 } else { 2281 key_size = 1; 2282 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2283 } 2284 hci_handle_read_encryption_key_size_complete(conn, key_size); 2285 } 2286 break; 2287 // assert pairing complete event is emitted. 2288 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2289 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2290 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2291 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2292 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2293 // lookup connection by gap pairing addr 2294 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2295 if (conn == NULL) break; 2296 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2297 break; 2298 2299 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2300 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2301 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2302 uint8_t event[67]; 2303 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2304 event[1] = 65; 2305 (void)memset(&event[2], 0, 65); 2306 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2307 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2308 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2309 event[2] = 3; 2310 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2311 } else { 2312 event[2] = 1; 2313 } 2314 } 2315 hci_emit_event(event, sizeof(event), 0); 2316 break; 2317 } 2318 2319 // note: only needed if user does not provide OOB data 2320 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2321 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2322 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2323 if (conn == NULL) break; 2324 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2325 break; 2326 #endif 2327 #endif 2328 default: 2329 break; 2330 } 2331 } 2332 2333 #ifdef ENABLE_BLE 2334 static void event_handle_le_connection_complete(const uint8_t * packet){ 2335 bd_addr_t addr; 2336 bd_addr_type_t addr_type; 2337 hci_connection_t * conn; 2338 2339 // Connection management 2340 reverse_bd_addr(&packet[8], addr); 2341 addr_type = (bd_addr_type_t)packet[7]; 2342 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2343 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2344 2345 #ifdef ENABLE_LE_CENTRAL 2346 // handle error: error is reported only to the initiator -> outgoing connection 2347 if (packet[3]){ 2348 2349 // handle cancelled outgoing connection 2350 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2351 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2352 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2353 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2354 // reset state 2355 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2356 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2357 // get outgoing connection conn struct for direct connect 2358 conn = gap_get_outgoing_connection(); 2359 } 2360 2361 // outgoing le connection establishment is done 2362 if (conn){ 2363 // remove entry 2364 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2365 btstack_memory_hci_connection_free( conn ); 2366 } 2367 return; 2368 } 2369 #endif 2370 2371 // on success, both hosts receive connection complete event 2372 if (packet[6] == HCI_ROLE_MASTER){ 2373 #ifdef ENABLE_LE_CENTRAL 2374 // if we're master on an le connection, it was an outgoing connection and we're done with it 2375 // note: no hci_connection_t object exists yet for connect with whitelist 2376 if (hci_is_le_connection_type(addr_type)){ 2377 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2378 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2379 } 2380 #endif 2381 } else { 2382 #ifdef ENABLE_LE_PERIPHERAL 2383 // if we're slave, it was an incoming connection, advertisements have stopped 2384 hci_stack->le_advertisements_active = false; 2385 #endif 2386 } 2387 2388 // LE connections are auto-accepted, so just create a connection if there isn't one already 2389 if (!conn){ 2390 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2391 } 2392 2393 // no memory, sorry. 2394 if (!conn){ 2395 return; 2396 } 2397 2398 conn->state = OPEN; 2399 conn->role = packet[6]; 2400 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2401 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2402 2403 #ifdef ENABLE_LE_PERIPHERAL 2404 if (packet[6] == HCI_ROLE_SLAVE){ 2405 hci_update_advertisements_enabled_for_current_roles(); 2406 } 2407 #endif 2408 2409 // init unenhanced att bearer mtu 2410 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2411 conn->att_connection.mtu_exchanged = false; 2412 2413 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2414 2415 // restart timer 2416 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2417 // btstack_run_loop_add_timer(&conn->timeout); 2418 2419 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2420 2421 hci_emit_nr_connections_changed(); 2422 } 2423 #endif 2424 2425 #ifdef ENABLE_CLASSIC 2426 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){ 2427 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2428 // LEVEL_4 is tested by l2cap 2429 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2430 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2431 if (level >= LEVEL_3){ 2432 // MITM not possible without keyboard or display 2433 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2434 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2435 2436 // MITM possible if one side has keyboard and the other has keyboard or display 2437 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2438 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2439 2440 // MITM not possible if one side has only display and other side has no keyboard 2441 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2442 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2443 } 2444 // LEVEL 2 requires SSP, which is a given 2445 return true; 2446 } 2447 2448 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2449 uint16_t i; 2450 for (i=0; i < size ; i++){ 2451 if (data[i] != 0) { 2452 return false; 2453 } 2454 } 2455 return true; 2456 } 2457 2458 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2459 // get requested security level 2460 gap_security_level_t requested_security_level = conn->requested_security_level; 2461 if (hci_stack->gap_secure_connections_only_mode){ 2462 requested_security_level = LEVEL_4; 2463 } 2464 2465 // assess security: LEVEL 4 requires SC 2466 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2467 if ((requested_security_level == LEVEL_4) && 2468 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2469 !hci_remote_sc_enabled(conn)){ 2470 log_info("Level 4 required, but SC not supported -> abort"); 2471 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2472 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2473 return; 2474 } 2475 2476 // assess security based on io capabilities 2477 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2478 // responder: fully validate io caps of both sides as well as OOB data 2479 bool security_possible = false; 2480 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2481 2482 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2483 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2484 // so we merge the OOB data availability 2485 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2486 if (conn->classic_oob_c_192 != NULL){ 2487 have_oob_data |= 1; 2488 } 2489 if (conn->classic_oob_c_256 != NULL){ 2490 have_oob_data |= 2; 2491 } 2492 // for up to Level 3, either P-192 as well as P-256 will do 2493 // 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 2494 // if remote does not SC, we should not receive P-256 data either 2495 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2496 security_possible = true; 2497 } 2498 // for Level 4, P-256 is needed 2499 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2500 security_possible = true; 2501 } 2502 #endif 2503 2504 if (security_possible == false){ 2505 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2506 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2507 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2508 return; 2509 } 2510 } else { 2511 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2512 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2513 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2514 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2515 log_info("Level 3+ required, but no input/output -> abort"); 2516 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2517 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2518 return; 2519 } 2520 #endif 2521 #endif 2522 } 2523 2524 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2525 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2526 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2527 } else { 2528 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2529 } 2530 #endif 2531 } 2532 2533 #endif 2534 2535 static void event_handler(uint8_t *packet, uint16_t size){ 2536 2537 uint16_t event_length = packet[1]; 2538 2539 // assert packet is complete 2540 if (size != (event_length + 2u)){ 2541 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2542 return; 2543 } 2544 2545 bd_addr_type_t addr_type; 2546 hci_con_handle_t handle; 2547 hci_connection_t * conn; 2548 int i; 2549 int create_connection_cmd; 2550 2551 #ifdef ENABLE_CLASSIC 2552 hci_link_type_t link_type; 2553 bd_addr_t addr; 2554 #endif 2555 2556 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2557 2558 switch (hci_event_packet_get_type(packet)) { 2559 2560 case HCI_EVENT_COMMAND_COMPLETE: 2561 handle_command_complete_event(packet, size); 2562 break; 2563 2564 case HCI_EVENT_COMMAND_STATUS: 2565 // get num cmd packets - limit to 1 to reduce complexity 2566 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2567 2568 // check command status to detected failed outgoing connections 2569 create_connection_cmd = 0; 2570 #ifdef ENABLE_CLASSIC 2571 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2572 create_connection_cmd = 1; 2573 } 2574 #endif 2575 #ifdef ENABLE_LE_CENTRAL 2576 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2577 create_connection_cmd = 1; 2578 } 2579 #endif 2580 if (create_connection_cmd) { 2581 uint8_t status = hci_event_command_status_get_status(packet); 2582 addr_type = hci_stack->outgoing_addr_type; 2583 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2584 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); 2585 2586 // reset outgoing address info 2587 memset(hci_stack->outgoing_addr, 0, 6); 2588 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2589 2590 // on error 2591 if (status != ERROR_CODE_SUCCESS){ 2592 #ifdef ENABLE_LE_CENTRAL 2593 if (hci_is_le_connection_type(addr_type)){ 2594 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2595 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2596 } 2597 #endif 2598 // error => outgoing connection failed 2599 if (conn != NULL){ 2600 hci_handle_connection_failed(conn, status); 2601 } 2602 } 2603 } 2604 2605 #ifdef ENABLE_CLASSIC 2606 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2607 uint8_t status = hci_event_command_status_get_status(packet); 2608 log_info("command status (inquiry), status %x", status); 2609 if (status == ERROR_CODE_SUCCESS) { 2610 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2611 } else { 2612 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2613 } 2614 } 2615 #endif 2616 break; 2617 2618 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2619 if (size < 3) return; 2620 uint16_t num_handles = packet[2]; 2621 if (size != (3u + num_handles * 4u)) return; 2622 uint16_t offset = 3; 2623 for (i=0; i<num_handles;i++){ 2624 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2625 offset += 2u; 2626 uint16_t num_packets = little_endian_read_16(packet, offset); 2627 offset += 2u; 2628 2629 conn = hci_connection_for_handle(handle); 2630 if (!conn){ 2631 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2632 continue; 2633 } 2634 2635 if (conn->num_packets_sent >= num_packets){ 2636 conn->num_packets_sent -= num_packets; 2637 } else { 2638 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2639 conn->num_packets_sent = 0; 2640 } 2641 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2642 2643 #ifdef ENABLE_CLASSIC 2644 // For SCO, we do the can_send_now_check here 2645 hci_notify_if_sco_can_send_now(); 2646 #endif 2647 } 2648 break; 2649 } 2650 2651 #ifdef ENABLE_CLASSIC 2652 case HCI_EVENT_INQUIRY_COMPLETE: 2653 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2654 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2655 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2656 hci_emit_event(event, sizeof(event), 1); 2657 } 2658 break; 2659 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2660 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2661 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2662 } 2663 break; 2664 case HCI_EVENT_CONNECTION_REQUEST: 2665 reverse_bd_addr(&packet[2], addr); 2666 link_type = (hci_link_type_t) packet[11]; 2667 2668 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2669 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2670 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2671 bd_addr_copy(hci_stack->decline_addr, addr); 2672 break; 2673 } 2674 2675 if (hci_stack->gap_classic_accept_callback != NULL){ 2676 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2677 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2678 bd_addr_copy(hci_stack->decline_addr, addr); 2679 break; 2680 } 2681 } 2682 2683 // TODO: eval COD 8-10 2684 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2685 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2686 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2687 if (!conn) { 2688 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2689 } 2690 if (!conn) { 2691 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2692 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2693 bd_addr_copy(hci_stack->decline_addr, addr); 2694 break; 2695 } 2696 conn->role = HCI_ROLE_SLAVE; 2697 conn->state = RECEIVED_CONNECTION_REQUEST; 2698 // store info about eSCO 2699 if (link_type == HCI_LINK_TYPE_ESCO){ 2700 conn->remote_supported_features[0] |= 1; 2701 } 2702 hci_run(); 2703 break; 2704 2705 case HCI_EVENT_CONNECTION_COMPLETE: 2706 // Connection management 2707 reverse_bd_addr(&packet[5], addr); 2708 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2709 addr_type = BD_ADDR_TYPE_ACL; 2710 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2711 if (conn) { 2712 if (!packet[2]){ 2713 conn->state = OPEN; 2714 conn->con_handle = little_endian_read_16(packet, 3); 2715 2716 // queue set supervision timeout if we're master 2717 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2718 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2719 } 2720 2721 // restart timer 2722 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2723 btstack_run_loop_add_timer(&conn->timeout); 2724 2725 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2726 2727 hci_emit_nr_connections_changed(); 2728 } else { 2729 // connection failed 2730 hci_handle_connection_failed(conn, packet[2]); 2731 } 2732 } 2733 break; 2734 2735 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2736 reverse_bd_addr(&packet[5], addr); 2737 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2738 if (packet[2]){ 2739 // connection failed 2740 break; 2741 } 2742 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2743 if (!conn) { 2744 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2745 } 2746 if (!conn) { 2747 break; 2748 } 2749 conn->state = OPEN; 2750 conn->con_handle = little_endian_read_16(packet, 3); 2751 2752 #ifdef ENABLE_SCO_OVER_HCI 2753 // update SCO 2754 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2755 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2756 } 2757 // trigger can send now 2758 if (hci_have_usb_transport()){ 2759 hci_stack->sco_can_send_now = true; 2760 } 2761 #endif 2762 #ifdef HAVE_SCO_TRANSPORT 2763 // configure sco transport 2764 if (hci_stack->sco_transport != NULL){ 2765 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2766 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2767 } 2768 #endif 2769 break; 2770 2771 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2772 handle = little_endian_read_16(packet, 3); 2773 conn = hci_connection_for_handle(handle); 2774 if (!conn) break; 2775 if (!packet[2]){ 2776 const uint8_t * features = &packet[5]; 2777 hci_handle_remote_features_page_0(conn, features); 2778 2779 // read extended features if possible 2780 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2781 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2782 break; 2783 } 2784 } 2785 hci_handle_remote_features_received(conn); 2786 break; 2787 2788 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2789 handle = little_endian_read_16(packet, 3); 2790 conn = hci_connection_for_handle(handle); 2791 if (!conn) break; 2792 // status = ok, page = 1 2793 if (!packet[2]) { 2794 uint8_t page_number = packet[5]; 2795 uint8_t maximum_page_number = packet[6]; 2796 const uint8_t * features = &packet[7]; 2797 bool done = false; 2798 switch (page_number){ 2799 case 1: 2800 hci_handle_remote_features_page_1(conn, features); 2801 if (maximum_page_number >= 2){ 2802 // get Secure Connections (Controller) from Page 2 if available 2803 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2804 } else { 2805 // otherwise, assume SC (Controller) == SC (Host) 2806 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2807 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2808 } 2809 done = true; 2810 } 2811 break; 2812 case 2: 2813 hci_handle_remote_features_page_2(conn, features); 2814 done = true; 2815 break; 2816 default: 2817 break; 2818 } 2819 if (!done) break; 2820 } 2821 hci_handle_remote_features_received(conn); 2822 break; 2823 2824 case HCI_EVENT_LINK_KEY_REQUEST: 2825 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2826 hci_event_link_key_request_get_bd_addr(packet, addr); 2827 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2828 if (!conn) break; 2829 2830 // lookup link key in db if not cached 2831 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2832 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2833 } 2834 2835 // response sent by hci_run() 2836 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2837 #endif 2838 break; 2839 2840 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2841 hci_event_link_key_request_get_bd_addr(packet, addr); 2842 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2843 if (!conn) break; 2844 2845 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2846 2847 // CVE-2020-26555: ignore NULL link key 2848 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2849 if (btstack_is_null(&packet[8], 16)) break; 2850 2851 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2852 // Change Connection Encryption keeps link key type 2853 if (link_key_type != CHANGED_COMBINATION_KEY){ 2854 conn->link_key_type = link_key_type; 2855 } 2856 2857 // cache link key. link keys stored in little-endian format for legacy reasons 2858 memcpy(&conn->link_key, &packet[8], 16); 2859 2860 // only store link key: 2861 // - if bondable enabled 2862 if (hci_stack->bondable == false) break; 2863 // - if security level sufficient 2864 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2865 // - for SSP, also check if remote side requested bonding as well 2866 if (conn->link_key_type != COMBINATION_KEY){ 2867 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2868 if (!remote_bonding){ 2869 break; 2870 } 2871 } 2872 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2873 break; 2874 } 2875 2876 case HCI_EVENT_PIN_CODE_REQUEST: 2877 hci_event_pin_code_request_get_bd_addr(packet, addr); 2878 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2879 if (!conn) break; 2880 2881 hci_pairing_started(conn, false); 2882 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2883 if (!hci_stack->bondable ){ 2884 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2885 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2886 hci_run(); 2887 return; 2888 } 2889 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2890 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2891 log_info("Level 4 required, but SC not supported -> abort"); 2892 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2893 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2894 hci_run(); 2895 return; 2896 } 2897 break; 2898 2899 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2900 hci_event_io_capability_response_get_bd_addr(packet, addr); 2901 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2902 if (!conn) break; 2903 2904 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2905 hci_pairing_started(conn, true); 2906 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2907 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2908 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2909 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2910 #endif 2911 break; 2912 2913 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2914 hci_event_io_capability_response_get_bd_addr(packet, addr); 2915 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2916 if (!conn) break; 2917 2918 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2919 hci_connection_timestamp(conn); 2920 hci_pairing_started(conn, true); 2921 break; 2922 2923 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2924 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2925 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2926 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2927 if (!conn) break; 2928 2929 hci_connection_timestamp(conn); 2930 2931 hci_pairing_started(conn, true); 2932 2933 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2934 break; 2935 #endif 2936 2937 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2938 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2939 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2940 if (!conn) break; 2941 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2942 if (hci_stack->ssp_auto_accept){ 2943 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2944 }; 2945 } else { 2946 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2947 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2948 // don't forward event to app 2949 hci_run(); 2950 return; 2951 } 2952 break; 2953 2954 case HCI_EVENT_USER_PASSKEY_REQUEST: 2955 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2956 if (hci_stack->ssp_auto_accept){ 2957 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2958 }; 2959 break; 2960 2961 case HCI_EVENT_MODE_CHANGE: 2962 handle = hci_event_mode_change_get_handle(packet); 2963 conn = hci_connection_for_handle(handle); 2964 if (!conn) break; 2965 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2966 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2967 break; 2968 #endif 2969 2970 case HCI_EVENT_ENCRYPTION_CHANGE: 2971 handle = hci_event_encryption_change_get_connection_handle(packet); 2972 conn = hci_connection_for_handle(handle); 2973 if (!conn) break; 2974 if (hci_event_encryption_change_get_status(packet) == 0u) { 2975 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2976 if (encryption_enabled){ 2977 if (hci_is_le_connection(conn)){ 2978 // For LE, we accept connection as encrypted 2979 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2980 } 2981 #ifdef ENABLE_CLASSIC 2982 else { 2983 2984 // dedicated bonding: send result and disconnect 2985 if (conn->bonding_flags & BONDING_DEDICATED){ 2986 conn->bonding_flags &= ~BONDING_DEDICATED; 2987 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2988 conn->bonding_status = packet[2]; 2989 break; 2990 } 2991 2992 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2993 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2994 bool connected_uses_aes_ccm = encryption_enabled == 2; 2995 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2996 log_info("SC during pairing, but only E0 now -> abort"); 2997 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2998 break; 2999 } 3000 3001 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3002 if (connected_uses_aes_ccm){ 3003 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3004 } 3005 3006 #ifdef ENABLE_TESTING_SUPPORT 3007 // work around for issue with PTS dongle 3008 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3009 #endif 3010 3011 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3012 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3013 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3014 } else { 3015 // if not, pretend everything is perfect 3016 hci_handle_read_encryption_key_size_complete(conn, 16); 3017 } 3018 } 3019 #endif 3020 } else { 3021 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3022 } 3023 } 3024 3025 break; 3026 3027 #ifdef ENABLE_CLASSIC 3028 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3029 handle = hci_event_authentication_complete_get_connection_handle(packet); 3030 conn = hci_connection_for_handle(handle); 3031 if (!conn) break; 3032 3033 // clear authentication active flag 3034 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3035 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3036 3037 // authenticated only if auth status == 0 3038 if (hci_event_authentication_complete_get_status(packet) == 0){ 3039 // authenticated 3040 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3041 3042 // If not already encrypted, start encryption 3043 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3044 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3045 break; 3046 } 3047 } 3048 3049 // emit updated security level 3050 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3051 break; 3052 3053 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3054 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3055 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3056 if (!conn) break; 3057 3058 // treat successfully paired connection as authenticated 3059 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3060 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3061 } 3062 3063 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3064 break; 3065 #endif 3066 3067 // HCI_EVENT_DISCONNECTION_COMPLETE 3068 // has been split, to first notify stack before shutting connection down 3069 // see end of function, too. 3070 case HCI_EVENT_DISCONNECTION_COMPLETE: 3071 if (packet[2]) break; // status != 0 3072 handle = little_endian_read_16(packet, 3); 3073 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3074 if (hci_stack->acl_fragmentation_total_size > 0u) { 3075 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3076 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3077 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3078 hci_stack->acl_fragmentation_total_size = 0; 3079 hci_stack->acl_fragmentation_pos = 0; 3080 if (release_buffer){ 3081 hci_release_packet_buffer(); 3082 } 3083 } 3084 } 3085 3086 conn = hci_connection_for_handle(handle); 3087 if (!conn) break; 3088 #ifdef ENABLE_CLASSIC 3089 // pairing failed if it was ongoing 3090 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3091 #endif 3092 3093 // emit dedicatd bonding event 3094 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3095 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3096 } 3097 3098 // mark connection for shutdown, stop timers, reset state 3099 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3100 hci_connection_stop_timer(conn); 3101 hci_connection_init(conn); 3102 3103 #ifdef ENABLE_BLE 3104 #ifdef ENABLE_LE_PERIPHERAL 3105 // re-enable advertisements for le connections if active 3106 if (hci_is_le_connection(conn)){ 3107 hci_update_advertisements_enabled_for_current_roles(); 3108 } 3109 #endif 3110 #endif 3111 break; 3112 3113 case HCI_EVENT_HARDWARE_ERROR: 3114 log_error("Hardware Error: 0x%02x", packet[2]); 3115 if (hci_stack->hardware_error_callback){ 3116 (*hci_stack->hardware_error_callback)(packet[2]); 3117 } else { 3118 // if no special requests, just reboot stack 3119 hci_power_control_off(); 3120 hci_power_control_on(); 3121 } 3122 break; 3123 3124 #ifdef ENABLE_CLASSIC 3125 case HCI_EVENT_ROLE_CHANGE: 3126 if (packet[2]) break; // status != 0 3127 reverse_bd_addr(&packet[3], addr); 3128 addr_type = BD_ADDR_TYPE_ACL; 3129 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3130 if (!conn) break; 3131 conn->role = packet[9]; 3132 break; 3133 #endif 3134 3135 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3136 // release packet buffer only for asynchronous transport and if there are not further fragements 3137 if (hci_transport_synchronous()) { 3138 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3139 return; // instead of break: to avoid re-entering hci_run() 3140 } 3141 hci_stack->acl_fragmentation_tx_active = 0; 3142 if (hci_stack->acl_fragmentation_total_size) break; 3143 hci_release_packet_buffer(); 3144 3145 // L2CAP receives this event via the hci_emit_event below 3146 3147 #ifdef ENABLE_CLASSIC 3148 // For SCO, we do the can_send_now_check here 3149 hci_notify_if_sco_can_send_now(); 3150 #endif 3151 break; 3152 3153 #ifdef ENABLE_CLASSIC 3154 case HCI_EVENT_SCO_CAN_SEND_NOW: 3155 // For SCO, we do the can_send_now_check here 3156 hci_stack->sco_can_send_now = true; 3157 hci_notify_if_sco_can_send_now(); 3158 return; 3159 3160 // explode inquriy results for easier consumption 3161 case HCI_EVENT_INQUIRY_RESULT: 3162 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3163 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3164 gap_inquiry_explode(packet, size); 3165 break; 3166 #endif 3167 3168 #ifdef ENABLE_BLE 3169 case HCI_EVENT_LE_META: 3170 switch (packet[2]){ 3171 #ifdef ENABLE_LE_CENTRAL 3172 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3173 // log_info("advertising report received"); 3174 if (!hci_stack->le_scanning_enabled) break; 3175 le_handle_advertisement_report(packet, size); 3176 break; 3177 #endif 3178 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3179 event_handle_le_connection_complete(packet); 3180 break; 3181 3182 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3183 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3184 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3185 conn = hci_connection_for_handle(handle); 3186 if (!conn) break; 3187 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3188 break; 3189 3190 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3191 // connection 3192 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3193 conn = hci_connection_for_handle(handle); 3194 if (conn) { 3195 // read arguments 3196 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3197 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3198 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3199 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3200 3201 // validate against current connection parameter range 3202 le_connection_parameter_range_t existing_range; 3203 gap_get_connection_parameter_range(&existing_range); 3204 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3205 if (update_parameter){ 3206 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3207 conn->le_conn_interval_min = le_conn_interval_min; 3208 conn->le_conn_interval_max = le_conn_interval_max; 3209 conn->le_conn_latency = le_conn_latency; 3210 conn->le_supervision_timeout = le_supervision_timeout; 3211 } else { 3212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3213 } 3214 } 3215 break; 3216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3217 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3218 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3219 conn = hci_connection_for_handle(handle); 3220 if (conn) { 3221 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3222 } 3223 break; 3224 #endif 3225 default: 3226 break; 3227 } 3228 break; 3229 #endif 3230 case HCI_EVENT_VENDOR_SPECIFIC: 3231 // Vendor specific commands often create vendor specific event instead of num completed packets 3232 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3233 switch (hci_stack->manufacturer){ 3234 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3235 hci_stack->num_cmd_packets = 1; 3236 break; 3237 default: 3238 break; 3239 } 3240 break; 3241 default: 3242 break; 3243 } 3244 3245 handle_event_for_current_stack_state(packet, size); 3246 3247 // notify upper stack 3248 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3249 3250 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3251 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3252 handle = little_endian_read_16(packet, 3); 3253 hci_connection_t * aConn = hci_connection_for_handle(handle); 3254 // discard connection if app did not trigger a reconnect in the event handler 3255 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3256 hci_shutdown_connection(aConn); 3257 } 3258 } 3259 3260 // execute main loop 3261 hci_run(); 3262 } 3263 3264 #ifdef ENABLE_CLASSIC 3265 3266 #ifdef ENABLE_SCO_OVER_HCI 3267 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3268 static void sco_schedule_tx(hci_connection_t * conn); 3269 3270 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3271 log_debug("SCO TX Timeout"); 3272 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3273 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3274 if (!conn) return; 3275 3276 // trigger send 3277 conn->sco_tx_ready = 1; 3278 // extra packet if CVSD but SCO buffer is too short 3279 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3280 conn->sco_tx_ready++; 3281 } 3282 hci_notify_if_sco_can_send_now(); 3283 } 3284 3285 3286 #define SCO_TX_AFTER_RX_MS (6) 3287 3288 static void sco_schedule_tx(hci_connection_t * conn){ 3289 3290 uint32_t now = btstack_run_loop_get_time_ms(); 3291 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3292 int time_delta_ms = sco_tx_ms - now; 3293 3294 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3295 3296 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3297 btstack_run_loop_remove_timer(timer); 3298 btstack_run_loop_set_timer(timer, time_delta_ms); 3299 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3300 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3301 btstack_run_loop_add_timer(timer); 3302 } 3303 #endif 3304 3305 static void sco_handler(uint8_t * packet, uint16_t size){ 3306 // lookup connection struct 3307 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3308 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3309 if (!conn) return; 3310 3311 #ifdef ENABLE_SCO_OVER_HCI 3312 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3313 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3314 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3315 packet[2] = 0x3c; 3316 memmove(&packet[3], &packet[23], 63); 3317 size = 63; 3318 } 3319 } 3320 3321 if (hci_have_usb_transport()){ 3322 // Nothing to do 3323 } else { 3324 // 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); 3325 if (hci_stack->synchronous_flow_control_enabled == 0){ 3326 uint32_t now = btstack_run_loop_get_time_ms(); 3327 3328 if (!conn->sco_rx_valid){ 3329 // ignore first 10 packets 3330 conn->sco_rx_count++; 3331 // log_debug("sco rx count %u", conn->sco_rx_count); 3332 if (conn->sco_rx_count == 10) { 3333 // use first timestamp as is and pretent it just started 3334 conn->sco_rx_ms = now; 3335 conn->sco_rx_valid = 1; 3336 conn->sco_rx_count = 0; 3337 sco_schedule_tx(conn); 3338 } 3339 } else { 3340 // track expected arrival timme 3341 conn->sco_rx_count++; 3342 conn->sco_rx_ms += 7; 3343 int delta = (int32_t) (now - conn->sco_rx_ms); 3344 if (delta > 0){ 3345 conn->sco_rx_ms++; 3346 } 3347 // log_debug("sco rx %u", conn->sco_rx_ms); 3348 sco_schedule_tx(conn); 3349 } 3350 } 3351 } 3352 #endif 3353 3354 // deliver to app 3355 if (hci_stack->sco_packet_handler) { 3356 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3357 } 3358 3359 #ifdef HAVE_SCO_TRANSPORT 3360 // We can send one packet for each received packet 3361 conn->sco_tx_ready++; 3362 hci_notify_if_sco_can_send_now(); 3363 #endif 3364 3365 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3366 conn->num_packets_completed++; 3367 hci_stack->host_completed_packets = 1; 3368 hci_run(); 3369 #endif 3370 } 3371 #endif 3372 3373 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3374 hci_dump_packet(packet_type, 1, packet, size); 3375 switch (packet_type) { 3376 case HCI_EVENT_PACKET: 3377 event_handler(packet, size); 3378 break; 3379 case HCI_ACL_DATA_PACKET: 3380 acl_handler(packet, size); 3381 break; 3382 #ifdef ENABLE_CLASSIC 3383 case HCI_SCO_DATA_PACKET: 3384 sco_handler(packet, size); 3385 break; 3386 #endif 3387 default: 3388 break; 3389 } 3390 } 3391 3392 /** 3393 * @brief Add event packet handler. 3394 */ 3395 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3396 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3397 } 3398 3399 3400 /** Register HCI packet handlers */ 3401 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3402 hci_stack->acl_packet_handler = handler; 3403 } 3404 3405 #ifdef ENABLE_CLASSIC 3406 /** 3407 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3408 */ 3409 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3410 hci_stack->sco_packet_handler = handler; 3411 } 3412 #endif 3413 3414 static void hci_state_reset(void){ 3415 // no connections yet 3416 hci_stack->connections = NULL; 3417 3418 // keep discoverable/connectable as this has been requested by the client(s) 3419 // hci_stack->discoverable = 0; 3420 // hci_stack->connectable = 0; 3421 // hci_stack->bondable = 1; 3422 // hci_stack->own_addr_type = 0; 3423 3424 // buffer is free 3425 hci_stack->hci_packet_buffer_reserved = false; 3426 3427 // no pending cmds 3428 hci_stack->decline_reason = 0; 3429 3430 hci_stack->secure_connections_active = false; 3431 3432 #ifdef ENABLE_CLASSIC 3433 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3434 hci_stack->gap_tasks = 3435 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3436 GAP_TASK_SET_CLASS_OF_DEVICE | 3437 GAP_TASK_SET_LOCAL_NAME | 3438 GAP_TASK_SET_EIR_DATA | 3439 GAP_TASK_WRITE_SCAN_ENABLE; 3440 #endif 3441 3442 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3443 hci_stack->classic_read_local_oob_data = false; 3444 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3445 #endif 3446 3447 // LE 3448 #ifdef ENABLE_BLE 3449 memset(hci_stack->le_random_address, 0, 6); 3450 hci_stack->le_random_address_set = 0; 3451 #endif 3452 #ifdef ENABLE_LE_CENTRAL 3453 hci_stack->le_scanning_active = false; 3454 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3455 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3456 hci_stack->le_whitelist_capacity = 0; 3457 #endif 3458 #ifdef ENABLE_LE_PERIPHERAL 3459 hci_stack->le_advertisements_active = false; 3460 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3461 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3462 } 3463 if (hci_stack->le_advertisements_data != NULL){ 3464 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3465 } 3466 #endif 3467 } 3468 3469 #ifdef ENABLE_CLASSIC 3470 /** 3471 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3472 */ 3473 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3474 // store and open remote device db 3475 hci_stack->link_key_db = link_key_db; 3476 if (hci_stack->link_key_db) { 3477 hci_stack->link_key_db->open(); 3478 } 3479 } 3480 #endif 3481 3482 void hci_init(const hci_transport_t *transport, const void *config){ 3483 3484 #ifdef HAVE_MALLOC 3485 if (!hci_stack) { 3486 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3487 } 3488 #else 3489 hci_stack = &hci_stack_static; 3490 #endif 3491 memset(hci_stack, 0, sizeof(hci_stack_t)); 3492 3493 // reference to use transport layer implementation 3494 hci_stack->hci_transport = transport; 3495 3496 // reference to used config 3497 hci_stack->config = config; 3498 3499 // setup pointer for outgoing packet buffer 3500 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3501 3502 // max acl payload size defined in config.h 3503 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3504 3505 // register packet handlers with transport 3506 transport->register_packet_handler(&packet_handler); 3507 3508 hci_stack->state = HCI_STATE_OFF; 3509 3510 // class of device 3511 hci_stack->class_of_device = 0x007a020c; // Smartphone 3512 3513 // bondable by default 3514 hci_stack->bondable = 1; 3515 3516 #ifdef ENABLE_CLASSIC 3517 // classic name 3518 hci_stack->local_name = default_classic_name; 3519 3520 // Master slave policy 3521 hci_stack->master_slave_policy = 1; 3522 3523 // Allow Role Switch 3524 hci_stack->allow_role_switch = 1; 3525 3526 // Default / minimum security level = 2 3527 hci_stack->gap_security_level = LEVEL_2; 3528 3529 // Default Security Mode 4 3530 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3531 3532 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3533 hci_stack->gap_required_encyrption_key_size = 7; 3534 3535 // Link Supervision Timeout 3536 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3537 3538 #endif 3539 3540 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3541 hci_stack->ssp_enable = 1; 3542 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3543 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3544 hci_stack->ssp_auto_accept = 1; 3545 3546 // Secure Connections: enable (requires support from Controller) 3547 hci_stack->secure_connections_enable = true; 3548 3549 // voice setting - signed 16 bit pcm data with CVSD over the air 3550 hci_stack->sco_voice_setting = 0x60; 3551 3552 #ifdef ENABLE_LE_CENTRAL 3553 // connection parameter to use for outgoing connections 3554 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3555 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3556 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3557 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3558 hci_stack->le_connection_latency = 4; // 4 3559 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3560 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3561 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3562 3563 // default LE Scanning 3564 hci_stack->le_scan_type = 0x1; // active 3565 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3566 hci_stack->le_scan_window = 0x30; // 30 ms 3567 #endif 3568 3569 #ifdef ENABLE_LE_PERIPHERAL 3570 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3571 #endif 3572 3573 // connection parameter range used to answer connection parameter update requests in l2cap 3574 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3575 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3576 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3577 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3578 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3579 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3580 3581 hci_state_reset(); 3582 } 3583 3584 void hci_deinit(void){ 3585 #ifdef HAVE_MALLOC 3586 if (hci_stack) { 3587 free(hci_stack); 3588 } 3589 #endif 3590 hci_stack = NULL; 3591 3592 #ifdef ENABLE_CLASSIC 3593 disable_l2cap_timeouts = 0; 3594 #endif 3595 } 3596 3597 /** 3598 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3599 */ 3600 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3601 hci_stack->chipset = chipset_driver; 3602 3603 // reset chipset driver - init is also called on power_up 3604 if (hci_stack->chipset && hci_stack->chipset->init){ 3605 hci_stack->chipset->init(hci_stack->config); 3606 } 3607 } 3608 3609 /** 3610 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3611 */ 3612 void hci_set_control(const btstack_control_t *hardware_control){ 3613 // references to used control implementation 3614 hci_stack->control = hardware_control; 3615 // init with transport config 3616 hardware_control->init(hci_stack->config); 3617 } 3618 3619 void hci_close(void){ 3620 3621 #ifdef ENABLE_CLASSIC 3622 // close remote device db 3623 if (hci_stack->link_key_db) { 3624 hci_stack->link_key_db->close(); 3625 } 3626 #endif 3627 3628 btstack_linked_list_iterator_t lit; 3629 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3630 while (btstack_linked_list_iterator_has_next(&lit)){ 3631 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3632 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3633 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3634 hci_shutdown_connection(connection); 3635 } 3636 3637 hci_power_control(HCI_POWER_OFF); 3638 3639 #ifdef HAVE_MALLOC 3640 free(hci_stack); 3641 #endif 3642 hci_stack = NULL; 3643 } 3644 3645 #ifdef HAVE_SCO_TRANSPORT 3646 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3647 hci_stack->sco_transport = sco_transport; 3648 sco_transport->register_packet_handler(&packet_handler); 3649 } 3650 #endif 3651 3652 #ifdef ENABLE_CLASSIC 3653 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3654 // validate ranage and set 3655 if (encryption_key_size < 7) return; 3656 if (encryption_key_size > 16) return; 3657 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3658 } 3659 3660 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3661 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3662 hci_stack->gap_security_mode = security_mode; 3663 return ERROR_CODE_SUCCESS; 3664 } else { 3665 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3666 } 3667 } 3668 3669 gap_security_mode_t gap_get_security_mode(void){ 3670 return hci_stack->gap_security_mode; 3671 } 3672 3673 void gap_set_security_level(gap_security_level_t security_level){ 3674 hci_stack->gap_security_level = security_level; 3675 } 3676 3677 gap_security_level_t gap_get_security_level(void){ 3678 if (hci_stack->gap_secure_connections_only_mode){ 3679 return LEVEL_4; 3680 } 3681 return hci_stack->gap_security_level; 3682 } 3683 3684 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3685 hci_stack->gap_minimal_service_security_level = security_level; 3686 } 3687 3688 void gap_set_secure_connections_only_mode(bool enable){ 3689 hci_stack->gap_secure_connections_only_mode = enable; 3690 } 3691 3692 bool gap_get_secure_connections_only_mode(void){ 3693 return hci_stack->gap_secure_connections_only_mode; 3694 } 3695 #endif 3696 3697 #ifdef ENABLE_CLASSIC 3698 void gap_set_class_of_device(uint32_t class_of_device){ 3699 hci_stack->class_of_device = class_of_device; 3700 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3701 hci_run(); 3702 } 3703 3704 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3705 hci_stack->default_link_policy_settings = default_link_policy_settings; 3706 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3707 hci_run(); 3708 } 3709 3710 void gap_set_allow_role_switch(bool allow_role_switch){ 3711 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3712 } 3713 3714 uint8_t hci_get_allow_role_switch(void){ 3715 return hci_stack->allow_role_switch; 3716 } 3717 3718 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3719 hci_stack->link_supervision_timeout = link_supervision_timeout; 3720 } 3721 3722 void hci_disable_l2cap_timeout_check(void){ 3723 disable_l2cap_timeouts = 1; 3724 } 3725 #endif 3726 3727 #ifndef HAVE_HOST_CONTROLLER_API 3728 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3729 void hci_set_bd_addr(bd_addr_t addr){ 3730 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3731 hci_stack->custom_bd_addr_set = 1; 3732 } 3733 #endif 3734 3735 // State-Module-Driver overview 3736 // state module low-level 3737 // HCI_STATE_OFF off close 3738 // HCI_STATE_INITIALIZING, on open 3739 // HCI_STATE_WORKING, on open 3740 // HCI_STATE_HALTING, on open 3741 // HCI_STATE_SLEEPING, off/sleep close 3742 // HCI_STATE_FALLING_ASLEEP on open 3743 3744 static int hci_power_control_on(void){ 3745 3746 // power on 3747 int err = 0; 3748 if (hci_stack->control && hci_stack->control->on){ 3749 err = (*hci_stack->control->on)(); 3750 } 3751 if (err){ 3752 log_error( "POWER_ON failed"); 3753 hci_emit_hci_open_failed(); 3754 return err; 3755 } 3756 3757 // int chipset driver 3758 if (hci_stack->chipset && hci_stack->chipset->init){ 3759 hci_stack->chipset->init(hci_stack->config); 3760 } 3761 3762 // init transport 3763 if (hci_stack->hci_transport->init){ 3764 hci_stack->hci_transport->init(hci_stack->config); 3765 } 3766 3767 // open transport 3768 err = hci_stack->hci_transport->open(); 3769 if (err){ 3770 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3771 if (hci_stack->control && hci_stack->control->off){ 3772 (*hci_stack->control->off)(); 3773 } 3774 hci_emit_hci_open_failed(); 3775 return err; 3776 } 3777 return 0; 3778 } 3779 3780 static void hci_power_control_off(void){ 3781 3782 log_info("hci_power_control_off"); 3783 3784 // close low-level device 3785 hci_stack->hci_transport->close(); 3786 3787 log_info("hci_power_control_off - hci_transport closed"); 3788 3789 // power off 3790 if (hci_stack->control && hci_stack->control->off){ 3791 (*hci_stack->control->off)(); 3792 } 3793 3794 log_info("hci_power_control_off - control closed"); 3795 3796 hci_stack->state = HCI_STATE_OFF; 3797 } 3798 3799 static void hci_power_control_sleep(void){ 3800 3801 log_info("hci_power_control_sleep"); 3802 3803 #if 0 3804 // don't close serial port during sleep 3805 3806 // close low-level device 3807 hci_stack->hci_transport->close(hci_stack->config); 3808 #endif 3809 3810 // sleep mode 3811 if (hci_stack->control && hci_stack->control->sleep){ 3812 (*hci_stack->control->sleep)(); 3813 } 3814 3815 hci_stack->state = HCI_STATE_SLEEPING; 3816 } 3817 3818 static int hci_power_control_wake(void){ 3819 3820 log_info("hci_power_control_wake"); 3821 3822 // wake on 3823 if (hci_stack->control && hci_stack->control->wake){ 3824 (*hci_stack->control->wake)(); 3825 } 3826 3827 #if 0 3828 // open low-level device 3829 int err = hci_stack->hci_transport->open(hci_stack->config); 3830 if (err){ 3831 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3832 if (hci_stack->control && hci_stack->control->off){ 3833 (*hci_stack->control->off)(); 3834 } 3835 hci_emit_hci_open_failed(); 3836 return err; 3837 } 3838 #endif 3839 3840 return 0; 3841 } 3842 3843 static void hci_power_transition_to_initializing(void){ 3844 // set up state machine 3845 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3846 hci_stack->hci_packet_buffer_reserved = false; 3847 hci_stack->state = HCI_STATE_INITIALIZING; 3848 hci_stack->substate = HCI_INIT_SEND_RESET; 3849 } 3850 3851 // returns error 3852 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3853 int err; 3854 switch (power_mode){ 3855 case HCI_POWER_ON: 3856 err = hci_power_control_on(); 3857 if (err != 0) { 3858 log_error("hci_power_control_on() error %d", err); 3859 return err; 3860 } 3861 hci_power_transition_to_initializing(); 3862 break; 3863 case HCI_POWER_OFF: 3864 // do nothing 3865 break; 3866 case HCI_POWER_SLEEP: 3867 // do nothing (with SLEEP == OFF) 3868 break; 3869 default: 3870 btstack_assert(false); 3871 break; 3872 } 3873 return ERROR_CODE_SUCCESS; 3874 } 3875 3876 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3877 switch (power_mode){ 3878 case HCI_POWER_ON: 3879 // do nothing 3880 break; 3881 case HCI_POWER_OFF: 3882 // no connections yet, just turn it off 3883 hci_power_control_off(); 3884 break; 3885 case HCI_POWER_SLEEP: 3886 // no connections yet, just turn it off 3887 hci_power_control_sleep(); 3888 break; 3889 default: 3890 btstack_assert(false); 3891 break; 3892 } 3893 return ERROR_CODE_SUCCESS; 3894 } 3895 3896 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3897 switch (power_mode){ 3898 case HCI_POWER_ON: 3899 // do nothing 3900 break; 3901 case HCI_POWER_OFF: 3902 // see hci_run 3903 hci_stack->state = HCI_STATE_HALTING; 3904 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3905 break; 3906 case HCI_POWER_SLEEP: 3907 // see hci_run 3908 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3909 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3910 break; 3911 default: 3912 btstack_assert(false); 3913 break; 3914 } 3915 return ERROR_CODE_SUCCESS; 3916 } 3917 3918 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3919 switch (power_mode){ 3920 case HCI_POWER_ON: 3921 hci_power_transition_to_initializing(); 3922 break; 3923 case HCI_POWER_OFF: 3924 // do nothing 3925 break; 3926 case HCI_POWER_SLEEP: 3927 // see hci_run 3928 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3929 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3930 break; 3931 default: 3932 btstack_assert(false); 3933 break; 3934 } 3935 return ERROR_CODE_SUCCESS; 3936 } 3937 3938 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3939 switch (power_mode){ 3940 case HCI_POWER_ON: 3941 hci_power_transition_to_initializing(); 3942 break; 3943 case HCI_POWER_OFF: 3944 // see hci_run 3945 hci_stack->state = HCI_STATE_HALTING; 3946 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3947 break; 3948 case HCI_POWER_SLEEP: 3949 // do nothing 3950 break; 3951 default: 3952 btstack_assert(false); 3953 break; 3954 } 3955 return ERROR_CODE_SUCCESS; 3956 } 3957 3958 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3959 int err; 3960 switch (power_mode){ 3961 case HCI_POWER_ON: 3962 err = hci_power_control_wake(); 3963 if (err) return err; 3964 hci_power_transition_to_initializing(); 3965 break; 3966 case HCI_POWER_OFF: 3967 hci_stack->state = HCI_STATE_HALTING; 3968 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3969 break; 3970 case HCI_POWER_SLEEP: 3971 // do nothing 3972 break; 3973 default: 3974 btstack_assert(false); 3975 break; 3976 } 3977 return ERROR_CODE_SUCCESS; 3978 } 3979 3980 int hci_power_control(HCI_POWER_MODE power_mode){ 3981 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3982 int err = 0; 3983 switch (hci_stack->state){ 3984 case HCI_STATE_OFF: 3985 err = hci_power_control_state_off(power_mode); 3986 break; 3987 case HCI_STATE_INITIALIZING: 3988 err = hci_power_control_state_initializing(power_mode); 3989 break; 3990 case HCI_STATE_WORKING: 3991 err = hci_power_control_state_working(power_mode); 3992 break; 3993 case HCI_STATE_HALTING: 3994 err = hci_power_control_state_halting(power_mode); 3995 break; 3996 case HCI_STATE_FALLING_ASLEEP: 3997 err = hci_power_control_state_falling_asleep(power_mode); 3998 break; 3999 case HCI_STATE_SLEEPING: 4000 err = hci_power_control_state_sleeping(power_mode); 4001 break; 4002 default: 4003 btstack_assert(false); 4004 break; 4005 } 4006 if (err != 0){ 4007 return err; 4008 } 4009 4010 // create internal event 4011 hci_emit_state(); 4012 4013 // trigger next/first action 4014 hci_run(); 4015 4016 return 0; 4017 } 4018 4019 4020 #ifdef ENABLE_CLASSIC 4021 4022 static void hci_update_scan_enable(void){ 4023 // 2 = page scan, 1 = inq scan 4024 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4025 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4026 hci_run(); 4027 } 4028 4029 void gap_discoverable_control(uint8_t enable){ 4030 if (enable) enable = 1; // normalize argument 4031 4032 if (hci_stack->discoverable == enable){ 4033 hci_emit_discoverable_enabled(hci_stack->discoverable); 4034 return; 4035 } 4036 4037 hci_stack->discoverable = enable; 4038 hci_update_scan_enable(); 4039 } 4040 4041 void gap_connectable_control(uint8_t enable){ 4042 if (enable) enable = 1; // normalize argument 4043 4044 // don't emit event 4045 if (hci_stack->connectable == enable) return; 4046 4047 hci_stack->connectable = enable; 4048 hci_update_scan_enable(); 4049 } 4050 #endif 4051 4052 void gap_local_bd_addr(bd_addr_t address_buffer){ 4053 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4054 } 4055 4056 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4057 static void hci_host_num_completed_packets(void){ 4058 4059 // create packet manually as arrays are not supported and num_commands should not get reduced 4060 hci_reserve_packet_buffer(); 4061 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4062 4063 uint16_t size = 0; 4064 uint16_t num_handles = 0; 4065 packet[size++] = 0x35; 4066 packet[size++] = 0x0c; 4067 size++; // skip param len 4068 size++; // skip num handles 4069 4070 // add { handle, packets } entries 4071 btstack_linked_item_t * it; 4072 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4073 hci_connection_t * connection = (hci_connection_t *) it; 4074 if (connection->num_packets_completed){ 4075 little_endian_store_16(packet, size, connection->con_handle); 4076 size += 2; 4077 little_endian_store_16(packet, size, connection->num_packets_completed); 4078 size += 2; 4079 // 4080 num_handles++; 4081 connection->num_packets_completed = 0; 4082 } 4083 } 4084 4085 packet[2] = size - 3; 4086 packet[3] = num_handles; 4087 4088 hci_stack->host_completed_packets = 0; 4089 4090 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4091 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4092 4093 // release packet buffer for synchronous transport implementations 4094 if (hci_transport_synchronous()){ 4095 hci_release_packet_buffer(); 4096 hci_emit_transport_packet_sent(); 4097 } 4098 } 4099 #endif 4100 4101 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4102 UNUSED(ds); 4103 hci_stack->substate = HCI_HALTING_CLOSE; 4104 // allow packet handlers to defer final shutdown 4105 hci_emit_state(); 4106 hci_run(); 4107 } 4108 4109 static bool hci_run_acl_fragments(void){ 4110 if (hci_stack->acl_fragmentation_total_size > 0u) { 4111 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4112 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4113 if (connection) { 4114 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4115 hci_send_acl_packet_fragments(connection); 4116 return true; 4117 } 4118 } else { 4119 // connection gone -> discard further fragments 4120 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4121 hci_stack->acl_fragmentation_total_size = 0; 4122 hci_stack->acl_fragmentation_pos = 0; 4123 } 4124 } 4125 return false; 4126 } 4127 4128 #ifdef ENABLE_CLASSIC 4129 static bool hci_run_general_gap_classic(void){ 4130 4131 // assert stack is working and classic is active 4132 if (hci_classic_supported() == false) return false; 4133 if (hci_stack->state != HCI_STATE_WORKING) return false; 4134 4135 // decline incoming connections 4136 if (hci_stack->decline_reason){ 4137 uint8_t reason = hci_stack->decline_reason; 4138 hci_stack->decline_reason = 0; 4139 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4140 return true; 4141 } 4142 4143 if (hci_stack->gap_tasks != 0){ 4144 hci_run_gap_tasks_classic(); 4145 return true; 4146 } 4147 4148 // start/stop inquiry 4149 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4150 uint8_t duration = hci_stack->inquiry_state; 4151 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4152 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4153 return true; 4154 } 4155 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4156 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4157 hci_send_cmd(&hci_inquiry_cancel); 4158 return true; 4159 } 4160 // remote name request 4161 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4162 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4163 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4164 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4165 return true; 4166 } 4167 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4168 // Local OOB data 4169 if (hci_stack->classic_read_local_oob_data){ 4170 hci_stack->classic_read_local_oob_data = false; 4171 if (hci_stack->local_supported_commands[1] & 0x10u){ 4172 hci_send_cmd(&hci_read_local_extended_oob_data); 4173 } else { 4174 hci_send_cmd(&hci_read_local_oob_data); 4175 } 4176 } 4177 #endif 4178 // pairing 4179 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4180 uint8_t state = hci_stack->gap_pairing_state; 4181 uint8_t pin_code[16]; 4182 switch (state){ 4183 case GAP_PAIRING_STATE_SEND_PIN: 4184 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4185 memset(pin_code, 0, 16); 4186 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4187 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4188 break; 4189 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4190 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4191 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4192 break; 4193 case GAP_PAIRING_STATE_SEND_PASSKEY: 4194 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4195 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4196 break; 4197 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4198 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4199 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4200 break; 4201 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4202 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4203 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4204 break; 4205 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4206 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4207 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4208 break; 4209 default: 4210 break; 4211 } 4212 return true; 4213 } 4214 return false; 4215 } 4216 #endif 4217 4218 #ifdef ENABLE_BLE 4219 static bool hci_run_general_gap_le(void){ 4220 4221 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4222 4223 if (hci_stack->state != HCI_STATE_WORKING) return false; 4224 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4225 4226 4227 // Phase 1: collect what to stop 4228 4229 bool scanning_stop = false; 4230 bool connecting_stop = false; 4231 bool advertising_stop = false; 4232 4233 #ifndef ENABLE_LE_CENTRAL 4234 UNUSED(scanning_stop); 4235 UNUSED(connecting_stop); 4236 #endif 4237 #ifndef ENABLE_LE_PERIPHERAL 4238 UNUSED(advertising_stop); 4239 #endif 4240 4241 // check if own address changes 4242 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4243 4244 // check if whitelist needs modification 4245 bool whitelist_modification_pending = false; 4246 btstack_linked_list_iterator_t lit; 4247 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4248 while (btstack_linked_list_iterator_has_next(&lit)){ 4249 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4250 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4251 whitelist_modification_pending = true; 4252 break; 4253 } 4254 } 4255 // check if resolving list needs modification 4256 bool resolving_list_modification_pending = false; 4257 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4258 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4259 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4260 resolving_list_modification_pending = true; 4261 } 4262 #endif 4263 4264 #ifdef ENABLE_LE_CENTRAL 4265 // scanning control 4266 if (hci_stack->le_scanning_active) { 4267 // stop if: 4268 // - parameter change required 4269 // - it's disabled 4270 // - whitelist change required but used for scanning 4271 // - resolving list modified 4272 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4273 if ((hci_stack->le_scanning_param_update) || 4274 !hci_stack->le_scanning_enabled || 4275 scanning_uses_whitelist || 4276 resolving_list_modification_pending){ 4277 4278 scanning_stop = true; 4279 } 4280 } 4281 #endif 4282 4283 #ifdef ENABLE_LE_CENTRAL 4284 // connecting control 4285 bool connecting_with_whitelist; 4286 switch (hci_stack->le_connecting_state){ 4287 case LE_CONNECTING_DIRECT: 4288 case LE_CONNECTING_WHITELIST: 4289 // stop connecting if: 4290 // - connecting uses white and whitelist modification pending 4291 // - if it got disabled 4292 // - resolving list modified 4293 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4294 if ((connecting_with_whitelist && whitelist_modification_pending) || 4295 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4296 resolving_list_modification_pending) { 4297 4298 connecting_stop = true; 4299 } 4300 break; 4301 default: 4302 break; 4303 } 4304 #endif 4305 4306 #ifdef ENABLE_LE_PERIPHERAL 4307 // le advertisement control 4308 if (hci_stack->le_advertisements_active){ 4309 // stop if: 4310 // - parameter change required 4311 // - random address used in advertising and changes 4312 // - it's disabled 4313 // - whitelist change required but used for advertisement filter policy 4314 // - resolving list modified 4315 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4316 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4317 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4318 if (advertising_change || 4319 (advertising_uses_random_address && random_address_change) || 4320 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4321 (advertising_uses_whitelist && whitelist_modification_pending) || 4322 resolving_list_modification_pending) { 4323 4324 advertising_stop = true; 4325 } 4326 } 4327 #endif 4328 4329 4330 // Phase 2: stop everything that should be off during modifications 4331 4332 #ifdef ENABLE_LE_CENTRAL 4333 if (scanning_stop){ 4334 hci_stack->le_scanning_active = false; 4335 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4336 return true; 4337 } 4338 #endif 4339 4340 #ifdef ENABLE_LE_CENTRAL 4341 if (connecting_stop){ 4342 hci_send_cmd(&hci_le_create_connection_cancel); 4343 return true; 4344 } 4345 #endif 4346 4347 #ifdef ENABLE_LE_PERIPHERAL 4348 if (advertising_stop){ 4349 hci_stack->le_advertisements_active = false; 4350 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4351 return true; 4352 } 4353 #endif 4354 4355 // Phase 3: modify 4356 4357 if (random_address_change){ 4358 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4359 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4360 return true; 4361 } 4362 4363 #ifdef ENABLE_LE_CENTRAL 4364 if (hci_stack->le_scanning_param_update){ 4365 hci_stack->le_scanning_param_update = false; 4366 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4367 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4368 return true; 4369 } 4370 #endif 4371 4372 #ifdef ENABLE_LE_PERIPHERAL 4373 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4374 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4375 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4376 hci_send_cmd(&hci_le_set_advertising_parameters, 4377 hci_stack->le_advertisements_interval_min, 4378 hci_stack->le_advertisements_interval_max, 4379 hci_stack->le_advertisements_type, 4380 hci_stack->le_advertisements_own_addr_type, 4381 hci_stack->le_advertisements_direct_address_type, 4382 hci_stack->le_advertisements_direct_address, 4383 hci_stack->le_advertisements_channel_map, 4384 hci_stack->le_advertisements_filter_policy); 4385 return true; 4386 } 4387 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4388 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4389 uint8_t adv_data_clean[31]; 4390 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4391 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4392 hci_stack->le_advertisements_data_len); 4393 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4394 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4395 return true; 4396 } 4397 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4398 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4399 uint8_t scan_data_clean[31]; 4400 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4401 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4402 hci_stack->le_scan_response_data_len); 4403 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4404 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4405 return true; 4406 } 4407 #endif 4408 4409 4410 #ifdef ENABLE_LE_CENTRAL 4411 // if connect with whitelist was active and is not cancelled yet, wait until next time 4412 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4413 #endif 4414 4415 // LE Whitelist Management 4416 if (whitelist_modification_pending){ 4417 // add/remove entries 4418 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4419 while (btstack_linked_list_iterator_has_next(&lit)){ 4420 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4421 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4422 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4423 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4424 return true; 4425 } 4426 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4427 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4428 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4429 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4430 return true; 4431 } 4432 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4433 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4434 btstack_memory_whitelist_entry_free(entry); 4435 } 4436 } 4437 } 4438 4439 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4440 // LE Resolving List Management 4441 if (resolving_list_supported) { 4442 uint16_t i; 4443 switch (hci_stack->le_resolving_list_state) { 4444 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4445 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4446 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4447 return true; 4448 case LE_RESOLVING_LIST_READ_SIZE: 4449 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4450 hci_send_cmd(&hci_le_read_resolving_list_size); 4451 return true; 4452 case LE_RESOLVING_LIST_SEND_CLEAR: 4453 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4454 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4455 sizeof(hci_stack->le_resolving_list_add_entries)); 4456 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4457 sizeof(hci_stack->le_resolving_list_remove_entries)); 4458 hci_send_cmd(&hci_le_clear_resolving_list); 4459 return true; 4460 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4461 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4462 uint8_t offset = i >> 3; 4463 uint8_t mask = 1 << (i & 7); 4464 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4465 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4466 bd_addr_t peer_identity_addreses; 4467 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4468 sm_key_t peer_irk; 4469 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4470 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4471 4472 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4473 // trigger whitelist entry 'update' (work around for controller bug) 4474 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4475 while (btstack_linked_list_iterator_has_next(&lit)) { 4476 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4477 if (entry->address_type != peer_identity_addr_type) continue; 4478 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4479 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4480 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4481 } 4482 #endif 4483 4484 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4485 peer_identity_addreses); 4486 return true; 4487 } 4488 4489 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4490 4491 /* fall through */ 4492 4493 case LE_RESOLVING_LIST_ADD_ENTRIES: 4494 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4495 uint8_t offset = i >> 3; 4496 uint8_t mask = 1 << (i & 7); 4497 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4498 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4499 bd_addr_t peer_identity_addreses; 4500 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4501 sm_key_t peer_irk; 4502 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4503 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4504 const uint8_t *local_irk = gap_get_persistent_irk(); 4505 // command uses format specifier 'P' that stores 16-byte value without flip 4506 uint8_t local_irk_flipped[16]; 4507 uint8_t peer_irk_flipped[16]; 4508 reverse_128(local_irk, local_irk_flipped); 4509 reverse_128(peer_irk, peer_irk_flipped); 4510 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4511 peer_irk_flipped, local_irk_flipped); 4512 return true; 4513 } 4514 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4515 break; 4516 4517 default: 4518 break; 4519 } 4520 } 4521 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4522 #endif 4523 4524 // Phase 4: restore state 4525 4526 #ifdef ENABLE_LE_CENTRAL 4527 // re-start scanning 4528 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4529 hci_stack->le_scanning_active = true; 4530 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4531 return true; 4532 } 4533 #endif 4534 4535 #ifdef ENABLE_LE_CENTRAL 4536 // re-start connecting 4537 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4538 bd_addr_t null_addr; 4539 memset(null_addr, 0, 6); 4540 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4541 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4542 hci_send_cmd(&hci_le_create_connection, 4543 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4544 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4545 1, // use whitelist 4546 0, // peer address type 4547 null_addr, // peer bd addr 4548 hci_stack->le_connection_own_addr_type, // our addr type: 4549 hci_stack->le_connection_interval_min, // conn interval min 4550 hci_stack->le_connection_interval_max, // conn interval max 4551 hci_stack->le_connection_latency, // conn latency 4552 hci_stack->le_supervision_timeout, // conn latency 4553 hci_stack->le_minimum_ce_length, // min ce length 4554 hci_stack->le_maximum_ce_length // max ce length 4555 ); 4556 return true; 4557 } 4558 #endif 4559 4560 #ifdef ENABLE_LE_PERIPHERAL 4561 // re-start advertising 4562 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4563 // check if advertisements should be enabled given 4564 hci_stack->le_advertisements_active = true; 4565 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4566 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4567 return true; 4568 } 4569 #endif 4570 4571 return false; 4572 } 4573 #endif 4574 4575 static bool hci_run_general_pending_commands(void){ 4576 btstack_linked_item_t * it; 4577 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4578 hci_connection_t * connection = (hci_connection_t *) it; 4579 4580 switch(connection->state){ 4581 case SEND_CREATE_CONNECTION: 4582 switch(connection->address_type){ 4583 #ifdef ENABLE_CLASSIC 4584 case BD_ADDR_TYPE_ACL: 4585 log_info("sending hci_create_connection"); 4586 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4587 break; 4588 #endif 4589 default: 4590 #ifdef ENABLE_BLE 4591 #ifdef ENABLE_LE_CENTRAL 4592 log_info("sending hci_le_create_connection"); 4593 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4594 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4595 hci_send_cmd(&hci_le_create_connection, 4596 hci_stack->le_connection_scan_interval, // conn scan interval 4597 hci_stack->le_connection_scan_window, // conn scan windows 4598 0, // don't use whitelist 4599 connection->address_type, // peer address type 4600 connection->address, // peer bd addr 4601 hci_stack->le_connection_own_addr_type, // our addr type: 4602 hci_stack->le_connection_interval_min, // conn interval min 4603 hci_stack->le_connection_interval_max, // conn interval max 4604 hci_stack->le_connection_latency, // conn latency 4605 hci_stack->le_supervision_timeout, // conn latency 4606 hci_stack->le_minimum_ce_length, // min ce length 4607 hci_stack->le_maximum_ce_length // max ce length 4608 ); 4609 connection->state = SENT_CREATE_CONNECTION; 4610 #endif 4611 #endif 4612 break; 4613 } 4614 return true; 4615 4616 #ifdef ENABLE_CLASSIC 4617 case RECEIVED_CONNECTION_REQUEST: 4618 connection->role = HCI_ROLE_SLAVE; 4619 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4620 log_info("sending hci_accept_connection_request"); 4621 connection->state = ACCEPTED_CONNECTION_REQUEST; 4622 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4623 } 4624 return true; 4625 #endif 4626 4627 #ifdef ENABLE_BLE 4628 #ifdef ENABLE_LE_CENTRAL 4629 case SEND_CANCEL_CONNECTION: 4630 connection->state = SENT_CANCEL_CONNECTION; 4631 hci_send_cmd(&hci_le_create_connection_cancel); 4632 return true; 4633 #endif 4634 #endif 4635 case SEND_DISCONNECT: 4636 connection->state = SENT_DISCONNECT; 4637 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4638 return true; 4639 4640 default: 4641 break; 4642 } 4643 4644 // no further commands if connection is about to get shut down 4645 if (connection->state == SENT_DISCONNECT) continue; 4646 4647 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4648 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4649 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4650 return true; 4651 } 4652 4653 #ifdef ENABLE_CLASSIC 4654 4655 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4656 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4657 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4658 return true; 4659 } 4660 4661 // Handling link key request requires remote supported features 4662 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4663 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4664 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4665 4666 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4667 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4668 if (have_link_key && security_level_sufficient){ 4669 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4670 } else { 4671 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4672 } 4673 return true; 4674 } 4675 4676 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4677 log_info("denying to pin request"); 4678 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4679 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4680 return true; 4681 } 4682 4683 // security assessment requires remote features 4684 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4685 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4686 hci_ssp_assess_security_on_io_cap_request(connection); 4687 // 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 4688 } 4689 4690 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4691 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4692 // set authentication requirements: 4693 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4694 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4695 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4696 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4697 authreq |= 1; 4698 } 4699 bool bonding = hci_stack->bondable; 4700 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4701 // if we have received IO Cap Response, we're in responder role 4702 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4703 if (bonding && !remote_bonding){ 4704 log_info("Remote not bonding, dropping local flag"); 4705 bonding = false; 4706 } 4707 } 4708 if (bonding){ 4709 if (connection->bonding_flags & BONDING_DEDICATED){ 4710 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4711 } else { 4712 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4713 } 4714 } 4715 uint8_t have_oob_data = 0; 4716 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4717 if (connection->classic_oob_c_192 != NULL){ 4718 have_oob_data |= 1; 4719 } 4720 if (connection->classic_oob_c_256 != NULL){ 4721 have_oob_data |= 2; 4722 } 4723 #endif 4724 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4725 return true; 4726 } 4727 4728 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4729 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4730 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4731 return true; 4732 } 4733 4734 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4735 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4736 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4737 const uint8_t zero[16] = { 0 }; 4738 const uint8_t * r_192 = zero; 4739 const uint8_t * c_192 = zero; 4740 const uint8_t * r_256 = zero; 4741 const uint8_t * c_256 = zero; 4742 // verify P-256 OOB 4743 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4744 c_256 = connection->classic_oob_c_256; 4745 if (connection->classic_oob_r_256 != NULL) { 4746 r_256 = connection->classic_oob_r_256; 4747 } 4748 } 4749 // verify P-192 OOB 4750 if ((connection->classic_oob_c_192 != NULL)) { 4751 c_192 = connection->classic_oob_c_192; 4752 if (connection->classic_oob_r_192 != NULL) { 4753 r_192 = connection->classic_oob_r_192; 4754 } 4755 } 4756 4757 // assess security 4758 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4759 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4760 if (need_level_4 && !can_reach_level_4){ 4761 log_info("Level 4 required, but not possible -> abort"); 4762 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4763 // send oob negative reply 4764 c_256 = NULL; 4765 c_192 = NULL; 4766 } 4767 4768 // Reply 4769 if (c_256 != zero) { 4770 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4771 } else if (c_192 != zero){ 4772 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4773 } else { 4774 hci_stack->classic_oob_con_handle = connection->con_handle; 4775 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4776 } 4777 return true; 4778 } 4779 #endif 4780 4781 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4782 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4783 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4784 return true; 4785 } 4786 4787 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4788 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4789 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4790 return true; 4791 } 4792 4793 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4794 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4795 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4796 return true; 4797 } 4798 4799 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4800 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4801 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4802 connection->state = SENT_DISCONNECT; 4803 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4804 return true; 4805 } 4806 4807 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4808 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4809 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4810 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4811 return true; 4812 } 4813 4814 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4815 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4816 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4817 return true; 4818 } 4819 4820 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4821 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4822 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4823 return true; 4824 } 4825 4826 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4827 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4828 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4829 return true; 4830 } 4831 4832 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4833 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4834 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4835 return true; 4836 } 4837 4838 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4839 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4840 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4841 return true; 4842 } 4843 #endif 4844 4845 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4846 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4847 #ifdef ENABLE_CLASSIC 4848 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4849 #endif 4850 if (connection->state != SENT_DISCONNECT){ 4851 connection->state = SENT_DISCONNECT; 4852 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4853 return true; 4854 } 4855 } 4856 4857 #ifdef ENABLE_CLASSIC 4858 uint16_t sniff_min_interval; 4859 switch (connection->sniff_min_interval){ 4860 case 0: 4861 break; 4862 case 0xffff: 4863 connection->sniff_min_interval = 0; 4864 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4865 return true; 4866 default: 4867 sniff_min_interval = connection->sniff_min_interval; 4868 connection->sniff_min_interval = 0; 4869 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4870 return true; 4871 } 4872 4873 if (connection->sniff_subrating_max_latency != 0xffff){ 4874 uint16_t max_latency = connection->sniff_subrating_max_latency; 4875 connection->sniff_subrating_max_latency = 0; 4876 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4877 return true; 4878 } 4879 4880 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4881 uint8_t service_type = (uint8_t) connection->qos_service_type; 4882 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4883 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); 4884 return true; 4885 } 4886 4887 if (connection->request_role != HCI_ROLE_INVALID){ 4888 hci_role_t role = connection->request_role; 4889 connection->request_role = HCI_ROLE_INVALID; 4890 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4891 return true; 4892 } 4893 #endif 4894 4895 #ifdef ENABLE_BLE 4896 switch (connection->le_con_parameter_update_state){ 4897 // response to L2CAP CON PARAMETER UPDATE REQUEST 4898 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4899 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4900 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4901 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4902 0x0000, 0xffff); 4903 return true; 4904 case CON_PARAMETER_UPDATE_REPLY: 4905 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4906 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4907 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4908 0x0000, 0xffff); 4909 return true; 4910 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4911 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4912 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4913 return true; 4914 default: 4915 break; 4916 } 4917 if (connection->le_phy_update_all_phys != 0xffu){ 4918 uint8_t all_phys = connection->le_phy_update_all_phys; 4919 connection->le_phy_update_all_phys = 0xff; 4920 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); 4921 return true; 4922 } 4923 #endif 4924 } 4925 return false; 4926 } 4927 4928 static void hci_run(void){ 4929 4930 bool done; 4931 4932 // send continuation fragments first, as they block the prepared packet buffer 4933 done = hci_run_acl_fragments(); 4934 if (done) return; 4935 4936 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4937 // send host num completed packets next as they don't require num_cmd_packets > 0 4938 if (!hci_can_send_comand_packet_transport()) return; 4939 if (hci_stack->host_completed_packets){ 4940 hci_host_num_completed_packets(); 4941 return; 4942 } 4943 #endif 4944 4945 if (!hci_can_send_command_packet_now()) return; 4946 4947 // global/non-connection oriented commands 4948 4949 4950 #ifdef ENABLE_CLASSIC 4951 // general gap classic 4952 done = hci_run_general_gap_classic(); 4953 if (done) return; 4954 #endif 4955 4956 #ifdef ENABLE_BLE 4957 // general gap le 4958 done = hci_run_general_gap_le(); 4959 if (done) return; 4960 #endif 4961 4962 // send pending HCI commands 4963 done = hci_run_general_pending_commands(); 4964 if (done) return; 4965 4966 // stack state sub statemachines 4967 hci_connection_t * connection; 4968 switch (hci_stack->state){ 4969 case HCI_STATE_INITIALIZING: 4970 hci_initializing_run(); 4971 break; 4972 4973 case HCI_STATE_HALTING: 4974 4975 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4976 switch (hci_stack->substate){ 4977 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4978 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4979 4980 #ifdef ENABLE_BLE 4981 #ifdef ENABLE_LE_CENTRAL 4982 // free whitelist entries 4983 { 4984 btstack_linked_list_iterator_t lit; 4985 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4986 while (btstack_linked_list_iterator_has_next(&lit)){ 4987 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4988 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4989 btstack_memory_whitelist_entry_free(entry); 4990 } 4991 } 4992 #endif 4993 #endif 4994 // close all open connections 4995 connection = (hci_connection_t *) hci_stack->connections; 4996 if (connection){ 4997 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4998 if (!hci_can_send_command_packet_now()) return; 4999 5000 // check state 5001 if (connection->state == SENT_DISCONNECT) return; 5002 connection->state = SENT_DISCONNECT; 5003 5004 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5005 5006 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5007 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5008 5009 // ... which would be ignored anyway as we shutdown (free) the connection now 5010 hci_shutdown_connection(connection); 5011 5012 // finally, send the disconnect command 5013 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5014 return; 5015 } 5016 5017 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5018 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5019 log_info("HCI_STATE_HALTING: wait 50 ms"); 5020 hci_stack->substate = HCI_HALTING_W4_TIMER; 5021 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5022 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5023 btstack_run_loop_add_timer(&hci_stack->timeout); 5024 break; 5025 } 5026 5027 /* fall through */ 5028 5029 case HCI_HALTING_CLOSE: 5030 log_info("HCI_STATE_HALTING, calling off"); 5031 5032 // switch mode 5033 hci_power_control_off(); 5034 5035 log_info("HCI_STATE_HALTING, emitting state"); 5036 hci_emit_state(); 5037 log_info("HCI_STATE_HALTING, done"); 5038 break; 5039 5040 case HCI_HALTING_W4_TIMER: 5041 // keep waiting 5042 5043 break; 5044 default: 5045 break; 5046 } 5047 5048 break; 5049 5050 case HCI_STATE_FALLING_ASLEEP: 5051 switch(hci_stack->substate) { 5052 case HCI_FALLING_ASLEEP_DISCONNECT: 5053 log_info("HCI_STATE_FALLING_ASLEEP"); 5054 // close all open connections 5055 connection = (hci_connection_t *) hci_stack->connections; 5056 if (connection){ 5057 5058 // send disconnect 5059 if (!hci_can_send_command_packet_now()) return; 5060 5061 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5062 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5063 5064 // send disconnected event right away - causes higher layer connections to get closed, too. 5065 hci_shutdown_connection(connection); 5066 return; 5067 } 5068 5069 if (hci_classic_supported()){ 5070 // disable page and inquiry scan 5071 if (!hci_can_send_command_packet_now()) return; 5072 5073 log_info("HCI_STATE_HALTING, disabling inq scans"); 5074 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5075 5076 // continue in next sub state 5077 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5078 break; 5079 } 5080 5081 /* fall through */ 5082 5083 case HCI_FALLING_ASLEEP_COMPLETE: 5084 log_info("HCI_STATE_HALTING, calling sleep"); 5085 // switch mode 5086 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5087 hci_emit_state(); 5088 break; 5089 5090 default: 5091 break; 5092 } 5093 break; 5094 5095 default: 5096 break; 5097 } 5098 } 5099 5100 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5101 // house-keeping 5102 5103 #ifdef ENABLE_CLASSIC 5104 bd_addr_t addr; 5105 hci_connection_t * conn; 5106 #endif 5107 #ifdef ENABLE_LE_CENTRAL 5108 uint8_t initiator_filter_policy; 5109 #endif 5110 5111 uint16_t opcode = little_endian_read_16(packet, 0); 5112 switch (opcode) { 5113 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5114 hci_stack->loopback_mode = packet[3]; 5115 break; 5116 5117 #ifdef ENABLE_CLASSIC 5118 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5119 reverse_bd_addr(&packet[3], addr); 5120 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5121 5122 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5123 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5124 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5125 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5126 } 5127 5128 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5129 if (!conn) { 5130 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5131 if (!conn) { 5132 // notify client that alloc failed 5133 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5134 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5135 } 5136 conn->state = SEND_CREATE_CONNECTION; 5137 conn->role = HCI_ROLE_MASTER; 5138 } 5139 5140 conn->con_handle = HCI_CON_HANDLE_INVALID; 5141 conn->role = HCI_ROLE_INVALID; 5142 5143 log_info("conn state %u", conn->state); 5144 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5145 switch (conn->state) { 5146 // if connection active exists 5147 case OPEN: 5148 // and OPEN, emit connection complete command 5149 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5150 // packet not sent to controller 5151 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5152 case RECEIVED_DISCONNECTION_COMPLETE: 5153 // create connection triggered in disconnect complete event, let's do it now 5154 break; 5155 case SEND_CREATE_CONNECTION: 5156 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5157 break; 5158 default: 5159 // otherwise, just ignore as it is already in the open process 5160 // packet not sent to controller 5161 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5162 } 5163 conn->state = SENT_CREATE_CONNECTION; 5164 5165 // track outgoing connection 5166 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5167 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5168 break; 5169 5170 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5171 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5172 // setup_synchronous_connection? Voice setting at offset 22 5173 // TODO: compare to current setting if sco connection already active 5174 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5175 break; 5176 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5177 // accept_synchronous_connection? Voice setting at offset 18 5178 // TODO: compare to current setting if sco connection already active 5179 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5180 break; 5181 #endif 5182 #endif 5183 5184 #ifdef ENABLE_BLE 5185 #ifdef ENABLE_LE_CENTRAL 5186 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5187 // white list used? 5188 initiator_filter_policy = packet[7]; 5189 switch (initiator_filter_policy) { 5190 case 0: 5191 // whitelist not used 5192 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5193 break; 5194 case 1: 5195 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5196 break; 5197 default: 5198 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5199 break; 5200 } 5201 // track outgoing connection 5202 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5203 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5204 break; 5205 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5206 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5207 break; 5208 #endif 5209 #endif 5210 default: 5211 break; 5212 } 5213 5214 hci_stack->num_cmd_packets--; 5215 5216 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5217 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5218 if (err != 0){ 5219 return ERROR_CODE_HARDWARE_FAILURE; 5220 } 5221 return ERROR_CODE_SUCCESS; 5222 } 5223 5224 // disconnect because of security block 5225 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5226 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5227 if (!connection) return; 5228 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5229 } 5230 5231 5232 // Configure Secure Simple Pairing 5233 5234 #ifdef ENABLE_CLASSIC 5235 5236 // enable will enable SSP during init 5237 void gap_ssp_set_enable(int enable){ 5238 hci_stack->ssp_enable = enable; 5239 } 5240 5241 static int hci_local_ssp_activated(void){ 5242 return gap_ssp_supported() && hci_stack->ssp_enable; 5243 } 5244 5245 // if set, BTstack will respond to io capability request using authentication requirement 5246 void gap_ssp_set_io_capability(int io_capability){ 5247 hci_stack->ssp_io_capability = io_capability; 5248 } 5249 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5250 hci_stack->ssp_authentication_requirement = authentication_requirement; 5251 } 5252 5253 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5254 void gap_ssp_set_auto_accept(int auto_accept){ 5255 hci_stack->ssp_auto_accept = auto_accept; 5256 } 5257 5258 void gap_secure_connections_enable(bool enable){ 5259 hci_stack->secure_connections_enable = enable; 5260 } 5261 5262 #endif 5263 5264 // va_list part of hci_send_cmd 5265 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5266 if (!hci_can_send_command_packet_now()){ 5267 log_error("hci_send_cmd called but cannot send packet now"); 5268 return ERROR_CODE_COMMAND_DISALLOWED; 5269 } 5270 5271 // for HCI INITIALIZATION 5272 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5273 hci_stack->last_cmd_opcode = cmd->opcode; 5274 5275 hci_reserve_packet_buffer(); 5276 uint8_t * packet = hci_stack->hci_packet_buffer; 5277 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5278 uint8_t status = hci_send_cmd_packet(packet, size); 5279 5280 // release packet buffer on error or for synchronous transport implementations 5281 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5282 hci_release_packet_buffer(); 5283 hci_emit_transport_packet_sent(); 5284 } 5285 5286 return status; 5287 } 5288 5289 /** 5290 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5291 */ 5292 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5293 va_list argptr; 5294 va_start(argptr, cmd); 5295 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5296 va_end(argptr); 5297 return status; 5298 } 5299 5300 // Create various non-HCI events. 5301 // TODO: generalize, use table similar to hci_create_command 5302 5303 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5304 // dump packet 5305 if (dump) { 5306 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5307 } 5308 5309 // dispatch to all event handlers 5310 btstack_linked_list_iterator_t it; 5311 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5312 while (btstack_linked_list_iterator_has_next(&it)){ 5313 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5314 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5315 } 5316 } 5317 5318 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5319 if (!hci_stack->acl_packet_handler) return; 5320 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5321 } 5322 5323 #ifdef ENABLE_CLASSIC 5324 static void hci_notify_if_sco_can_send_now(void){ 5325 // notify SCO sender if waiting 5326 if (!hci_stack->sco_waiting_for_can_send_now) return; 5327 if (hci_can_send_sco_packet_now()){ 5328 hci_stack->sco_waiting_for_can_send_now = 0; 5329 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5330 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5331 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5332 } 5333 } 5334 5335 // parsing end emitting has been merged to reduce code size 5336 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5337 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5338 5339 uint8_t * eir_data; 5340 ad_context_t context; 5341 const uint8_t * name; 5342 uint8_t name_len; 5343 5344 if (size < 3) return; 5345 5346 int event_type = hci_event_packet_get_type(packet); 5347 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5348 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5349 5350 switch (event_type){ 5351 case HCI_EVENT_INQUIRY_RESULT: 5352 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5353 if (size != (3 + (num_responses * 14))) return; 5354 break; 5355 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5356 if (size != 257) return; 5357 if (num_responses != 1) return; 5358 break; 5359 default: 5360 return; 5361 } 5362 5363 // event[1] is set at the end 5364 int i; 5365 for (i=0; i<num_responses;i++){ 5366 memset(event, 0, sizeof(event)); 5367 event[0] = GAP_EVENT_INQUIRY_RESULT; 5368 uint8_t event_size = 27; // if name is not set by EIR 5369 5370 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5371 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5372 (void)memcpy(&event[9], 5373 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5374 3); // class of device 5375 (void)memcpy(&event[12], 5376 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5377 2); // clock offset 5378 5379 switch (event_type){ 5380 case HCI_EVENT_INQUIRY_RESULT: 5381 // 14,15,16,17 = 0, size 18 5382 break; 5383 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5384 event[14] = 1; 5385 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5386 // 16,17 = 0, size 18 5387 break; 5388 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5389 event[14] = 1; 5390 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5391 // EIR packets only contain a single inquiry response 5392 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5393 name = NULL; 5394 // Iterate over EIR data 5395 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5396 uint8_t data_type = ad_iterator_get_data_type(&context); 5397 uint8_t data_size = ad_iterator_get_data_len(&context); 5398 const uint8_t * data = ad_iterator_get_data(&context); 5399 // Prefer Complete Local Name over Shortened Local Name 5400 switch (data_type){ 5401 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5402 if (name) continue; 5403 /* fall through */ 5404 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5405 name = data; 5406 name_len = data_size; 5407 break; 5408 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5409 if (data_size != 8) break; 5410 event[16] = 1; 5411 memcpy(&event[17], data, 8); 5412 break; 5413 default: 5414 break; 5415 } 5416 } 5417 if (name){ 5418 event[25] = 1; 5419 // truncate name if needed 5420 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5421 event[26] = len; 5422 (void)memcpy(&event[27], name, len); 5423 event_size += len; 5424 } 5425 break; 5426 default: 5427 return; 5428 } 5429 event[1] = event_size - 2; 5430 hci_emit_event(event, event_size, 1); 5431 } 5432 } 5433 #endif 5434 5435 void hci_emit_state(void){ 5436 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5437 uint8_t event[3]; 5438 event[0] = BTSTACK_EVENT_STATE; 5439 event[1] = sizeof(event) - 2u; 5440 event[2] = hci_stack->state; 5441 hci_emit_event(event, sizeof(event), 1); 5442 } 5443 5444 #ifdef ENABLE_CLASSIC 5445 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5446 uint8_t event[13]; 5447 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5448 event[1] = sizeof(event) - 2; 5449 event[2] = status; 5450 little_endian_store_16(event, 3, con_handle); 5451 reverse_bd_addr(address, &event[5]); 5452 event[11] = 1; // ACL connection 5453 event[12] = 0; // encryption disabled 5454 hci_emit_event(event, sizeof(event), 1); 5455 } 5456 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5457 if (disable_l2cap_timeouts) return; 5458 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5459 uint8_t event[4]; 5460 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5461 event[1] = sizeof(event) - 2; 5462 little_endian_store_16(event, 2, conn->con_handle); 5463 hci_emit_event(event, sizeof(event), 1); 5464 } 5465 #endif 5466 5467 #ifdef ENABLE_BLE 5468 #ifdef ENABLE_LE_CENTRAL 5469 static void hci_emit_le_connection_complete(uint8_t address_type, const bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5470 uint8_t event[21]; 5471 event[0] = HCI_EVENT_LE_META; 5472 event[1] = sizeof(event) - 2u; 5473 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5474 event[3] = status; 5475 little_endian_store_16(event, 4, con_handle); 5476 event[6] = 0; // TODO: role 5477 event[7] = address_type; 5478 reverse_bd_addr(address, &event[8]); 5479 little_endian_store_16(event, 14, 0); // interval 5480 little_endian_store_16(event, 16, 0); // latency 5481 little_endian_store_16(event, 18, 0); // supervision timeout 5482 event[20] = 0; // master clock accuracy 5483 hci_emit_event(event, sizeof(event), 1); 5484 } 5485 #endif 5486 #endif 5487 5488 static void hci_emit_transport_packet_sent(void){ 5489 // notify upper stack that it might be possible to send again 5490 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5491 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5492 } 5493 5494 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5495 uint8_t event[6]; 5496 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5497 event[1] = sizeof(event) - 2u; 5498 event[2] = 0; // status = OK 5499 little_endian_store_16(event, 3, con_handle); 5500 event[5] = reason; 5501 hci_emit_event(event, sizeof(event), 1); 5502 } 5503 5504 static void hci_emit_nr_connections_changed(void){ 5505 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5506 uint8_t event[3]; 5507 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5508 event[1] = sizeof(event) - 2u; 5509 event[2] = nr_hci_connections(); 5510 hci_emit_event(event, sizeof(event), 1); 5511 } 5512 5513 static void hci_emit_hci_open_failed(void){ 5514 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5515 uint8_t event[2]; 5516 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5517 event[1] = sizeof(event) - 2u; 5518 hci_emit_event(event, sizeof(event), 1); 5519 } 5520 5521 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5522 log_info("hci_emit_dedicated_bonding_result %u ", status); 5523 uint8_t event[9]; 5524 int pos = 0; 5525 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5526 event[pos++] = sizeof(event) - 2u; 5527 event[pos++] = status; 5528 reverse_bd_addr(address, &event[pos]); 5529 hci_emit_event(event, sizeof(event), 1); 5530 } 5531 5532 5533 #ifdef ENABLE_CLASSIC 5534 5535 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5536 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5537 uint8_t event[5]; 5538 int pos = 0; 5539 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5540 event[pos++] = sizeof(event) - 2; 5541 little_endian_store_16(event, 2, con_handle); 5542 pos += 2; 5543 event[pos++] = level; 5544 hci_emit_event(event, sizeof(event), 1); 5545 } 5546 5547 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5548 if (!connection) return LEVEL_0; 5549 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5550 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5551 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5552 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5553 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5554 // LEVEL 4 always requires 128 bit encrytion key size 5555 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5556 security_level = LEVEL_3; 5557 } 5558 return security_level; 5559 } 5560 5561 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5562 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5563 uint8_t event[3]; 5564 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5565 event[1] = sizeof(event) - 2; 5566 event[2] = enabled; 5567 hci_emit_event(event, sizeof(event), 1); 5568 } 5569 5570 // query if remote side supports eSCO 5571 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5572 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5573 if (!connection) return false; 5574 return (connection->remote_supported_features[0] & 1) != 0; 5575 } 5576 5577 static bool hci_ssp_supported(hci_connection_t * connection){ 5578 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5579 return (connection->bonding_flags & mask) == mask; 5580 } 5581 5582 // query if remote side supports SSP 5583 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5584 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5585 if (!connection) return false; 5586 return hci_ssp_supported(connection) ? 1 : 0; 5587 } 5588 5589 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5590 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5591 } 5592 5593 /** 5594 * Check if remote supported features query has completed 5595 */ 5596 bool hci_remote_features_available(hci_con_handle_t handle){ 5597 hci_connection_t * connection = hci_connection_for_handle(handle); 5598 if (!connection) return false; 5599 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5600 } 5601 5602 /** 5603 * Trigger remote supported features query 5604 */ 5605 void hci_remote_features_query(hci_con_handle_t con_handle){ 5606 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5607 if (!connection) return; 5608 if ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) return; 5609 connection->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5610 hci_run(); 5611 } 5612 5613 // GAP API 5614 /** 5615 * @bbrief enable/disable bonding. default is enabled 5616 * @praram enabled 5617 */ 5618 void gap_set_bondable_mode(int enable){ 5619 hci_stack->bondable = enable ? 1 : 0; 5620 } 5621 /** 5622 * @brief Get bondable mode. 5623 * @return 1 if bondable 5624 */ 5625 int gap_get_bondable_mode(void){ 5626 return hci_stack->bondable; 5627 } 5628 5629 /** 5630 * @brief map link keys to security levels 5631 */ 5632 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5633 switch (link_key_type){ 5634 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5635 return LEVEL_4; 5636 case COMBINATION_KEY: 5637 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5638 return LEVEL_3; 5639 default: 5640 return LEVEL_2; 5641 } 5642 } 5643 5644 /** 5645 * @brief map link keys to secure connection yes/no 5646 */ 5647 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5648 switch (link_key_type){ 5649 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5650 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5651 return 1; 5652 default: 5653 return 0; 5654 } 5655 } 5656 5657 /** 5658 * @brief map link keys to authenticated 5659 */ 5660 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5661 switch (link_key_type){ 5662 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5663 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5664 return 1; 5665 default: 5666 return 0; 5667 } 5668 } 5669 5670 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5671 log_info("gap_mitm_protection_required_for_security_level %u", level); 5672 return level > LEVEL_2; 5673 } 5674 5675 /** 5676 * @brief get current security level 5677 */ 5678 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5679 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5680 if (!connection) return LEVEL_0; 5681 return gap_security_level_for_connection(connection); 5682 } 5683 5684 /** 5685 * @brief request connection to device to 5686 * @result GAP_AUTHENTICATION_RESULT 5687 */ 5688 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5689 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5690 if (!connection){ 5691 hci_emit_security_level(con_handle, LEVEL_0); 5692 return; 5693 } 5694 5695 btstack_assert(hci_is_le_connection(connection) == false); 5696 5697 // Core Spec 5.2, GAP 5.2.2: "When in Secure Connections Only mode, all services (except those allowed to have Security Mode 4, Level 0) 5698 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5699 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5700 requested_level = LEVEL_4; 5701 } 5702 5703 gap_security_level_t current_level = gap_security_level(con_handle); 5704 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5705 requested_level, connection->requested_security_level, current_level); 5706 5707 // authentication active if authentication request was sent or planned level > 0 5708 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5709 if (authentication_active){ 5710 // authentication already active 5711 if (connection->requested_security_level < requested_level){ 5712 // increase requested level as new level is higher 5713 // TODO: handle re-authentication when done 5714 connection->requested_security_level = requested_level; 5715 } 5716 } else { 5717 // no request active, notify if security sufficient 5718 if (requested_level <= current_level){ 5719 hci_emit_security_level(con_handle, current_level); 5720 return; 5721 } 5722 5723 // store request 5724 connection->requested_security_level = requested_level; 5725 5726 // request remote features if not already active 5727 hci_remote_features_query(con_handle); 5728 5729 // start to authenticate connection 5730 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5731 hci_run(); 5732 } 5733 } 5734 5735 /** 5736 * @brief start dedicated bonding with device. disconnect after bonding 5737 * @param device 5738 * @param request MITM protection 5739 * @result GAP_DEDICATED_BONDING_COMPLETE 5740 */ 5741 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5742 5743 // create connection state machine 5744 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5745 5746 if (!connection){ 5747 return BTSTACK_MEMORY_ALLOC_FAILED; 5748 } 5749 5750 // delete linkn key 5751 gap_drop_link_key_for_bd_addr(device); 5752 5753 // configure LEVEL_2/3, dedicated bonding 5754 connection->state = SEND_CREATE_CONNECTION; 5755 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5756 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5757 connection->bonding_flags = BONDING_DEDICATED; 5758 5759 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5760 5761 // handle: connnection failure (connection complete != ok) 5762 // handle: authentication failure 5763 // handle: disconnect on done 5764 5765 hci_run(); 5766 5767 return 0; 5768 } 5769 5770 void gap_set_local_name(const char * local_name){ 5771 hci_stack->local_name = local_name; 5772 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5773 // also update EIR if not set by user 5774 if (hci_stack->eir_data == NULL){ 5775 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5776 } 5777 hci_run(); 5778 } 5779 #endif 5780 5781 5782 #ifdef ENABLE_BLE 5783 5784 #ifdef ENABLE_LE_CENTRAL 5785 void gap_start_scan(void){ 5786 hci_stack->le_scanning_enabled = true; 5787 hci_run(); 5788 } 5789 5790 void gap_stop_scan(void){ 5791 hci_stack->le_scanning_enabled = false; 5792 hci_run(); 5793 } 5794 5795 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5796 hci_stack->le_scan_type = scan_type; 5797 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5798 hci_stack->le_scan_interval = scan_interval; 5799 hci_stack->le_scan_window = scan_window; 5800 hci_stack->le_scanning_param_update = true; 5801 hci_run(); 5802 } 5803 5804 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5805 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5806 } 5807 5808 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5809 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5810 if (!conn){ 5811 // disallow if le connection is already outgoing 5812 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5813 log_error("le connection already active"); 5814 return ERROR_CODE_COMMAND_DISALLOWED; 5815 } 5816 5817 log_info("gap_connect: no connection exists yet, creating context"); 5818 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5819 if (!conn){ 5820 // notify client that alloc failed 5821 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5822 log_info("gap_connect: failed to alloc hci_connection_t"); 5823 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5824 } 5825 5826 // set le connecting state 5827 if (hci_is_le_connection_type(addr_type)){ 5828 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5829 } 5830 5831 conn->state = SEND_CREATE_CONNECTION; 5832 log_info("gap_connect: send create connection next"); 5833 hci_run(); 5834 return ERROR_CODE_SUCCESS; 5835 } 5836 5837 if (!hci_is_le_connection(conn) || 5838 (conn->state == SEND_CREATE_CONNECTION) || 5839 (conn->state == SENT_CREATE_CONNECTION)) { 5840 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5841 log_error("gap_connect: classic connection or connect is already being created"); 5842 return GATT_CLIENT_IN_WRONG_STATE; 5843 } 5844 5845 // check if connection was just disconnected 5846 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5847 log_info("gap_connect: send create connection (again)"); 5848 conn->state = SEND_CREATE_CONNECTION; 5849 hci_run(); 5850 return ERROR_CODE_SUCCESS; 5851 } 5852 5853 log_info("gap_connect: context exists with state %u", conn->state); 5854 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5855 hci_run(); 5856 return ERROR_CODE_SUCCESS; 5857 } 5858 5859 // @assumption: only a single outgoing LE Connection exists 5860 static hci_connection_t * gap_get_outgoing_connection(void){ 5861 btstack_linked_item_t *it; 5862 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5863 hci_connection_t * conn = (hci_connection_t *) it; 5864 if (!hci_is_le_connection(conn)) continue; 5865 switch (conn->state){ 5866 case SEND_CREATE_CONNECTION: 5867 case SENT_CREATE_CONNECTION: 5868 case SENT_CANCEL_CONNECTION: 5869 return conn; 5870 default: 5871 break; 5872 }; 5873 } 5874 return NULL; 5875 } 5876 5877 uint8_t gap_connect_cancel(void){ 5878 hci_connection_t * conn = gap_get_outgoing_connection(); 5879 if (!conn) return 0; 5880 switch (conn->state){ 5881 case SEND_CREATE_CONNECTION: 5882 // skip sending create connection and emit event instead 5883 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5884 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5885 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5886 btstack_memory_hci_connection_free( conn ); 5887 break; 5888 case SENT_CREATE_CONNECTION: 5889 // request to send cancel connection 5890 conn->state = SEND_CANCEL_CONNECTION; 5891 hci_run(); 5892 break; 5893 default: 5894 break; 5895 } 5896 return 0; 5897 } 5898 #endif 5899 5900 #ifdef ENABLE_LE_CENTRAL 5901 /** 5902 * @brief Set connection parameters for outgoing connections 5903 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5904 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5905 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5906 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5907 * @param conn_latency, default: 4 5908 * @param supervision_timeout (unit: 10ms), default: 720 ms 5909 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5910 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5911 */ 5912 5913 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5914 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5915 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5916 hci_stack->le_connection_scan_interval = conn_scan_interval; 5917 hci_stack->le_connection_scan_window = conn_scan_window; 5918 hci_stack->le_connection_interval_min = conn_interval_min; 5919 hci_stack->le_connection_interval_max = conn_interval_max; 5920 hci_stack->le_connection_latency = conn_latency; 5921 hci_stack->le_supervision_timeout = supervision_timeout; 5922 hci_stack->le_minimum_ce_length = min_ce_length; 5923 hci_stack->le_maximum_ce_length = max_ce_length; 5924 } 5925 #endif 5926 5927 /** 5928 * @brief Updates the connection parameters for a given LE connection 5929 * @param handle 5930 * @param conn_interval_min (unit: 1.25ms) 5931 * @param conn_interval_max (unit: 1.25ms) 5932 * @param conn_latency 5933 * @param supervision_timeout (unit: 10ms) 5934 * @returns 0 if ok 5935 */ 5936 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5937 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5938 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5939 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5940 connection->le_conn_interval_min = conn_interval_min; 5941 connection->le_conn_interval_max = conn_interval_max; 5942 connection->le_conn_latency = conn_latency; 5943 connection->le_supervision_timeout = supervision_timeout; 5944 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5945 hci_run(); 5946 return 0; 5947 } 5948 5949 /** 5950 * @brief Request an update of the connection parameter for a given LE connection 5951 * @param handle 5952 * @param conn_interval_min (unit: 1.25ms) 5953 * @param conn_interval_max (unit: 1.25ms) 5954 * @param conn_latency 5955 * @param supervision_timeout (unit: 10ms) 5956 * @returns 0 if ok 5957 */ 5958 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5959 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5960 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5961 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5962 connection->le_conn_interval_min = conn_interval_min; 5963 connection->le_conn_interval_max = conn_interval_max; 5964 connection->le_conn_latency = conn_latency; 5965 connection->le_supervision_timeout = supervision_timeout; 5966 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5967 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5968 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5969 return 0; 5970 } 5971 5972 #ifdef ENABLE_LE_PERIPHERAL 5973 5974 /** 5975 * @brief Set Advertisement Data 5976 * @param advertising_data_length 5977 * @param advertising_data (max 31 octets) 5978 * @note data is not copied, pointer has to stay valid 5979 */ 5980 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5981 hci_stack->le_advertisements_data_len = advertising_data_length; 5982 hci_stack->le_advertisements_data = advertising_data; 5983 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5984 hci_run(); 5985 } 5986 5987 /** 5988 * @brief Set Scan Response Data 5989 * @param advertising_data_length 5990 * @param advertising_data (max 31 octets) 5991 * @note data is not copied, pointer has to stay valid 5992 */ 5993 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5994 hci_stack->le_scan_response_data_len = scan_response_data_length; 5995 hci_stack->le_scan_response_data = scan_response_data; 5996 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5997 hci_run(); 5998 } 5999 6000 /** 6001 * @brief Set Advertisement Parameters 6002 * @param adv_int_min 6003 * @param adv_int_max 6004 * @param adv_type 6005 * @param direct_address_type 6006 * @param direct_address 6007 * @param channel_map 6008 * @param filter_policy 6009 * 6010 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6011 */ 6012 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6013 uint8_t direct_address_typ, bd_addr_t direct_address, 6014 uint8_t channel_map, uint8_t filter_policy) { 6015 6016 hci_stack->le_advertisements_interval_min = adv_int_min; 6017 hci_stack->le_advertisements_interval_max = adv_int_max; 6018 hci_stack->le_advertisements_type = adv_type; 6019 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6020 hci_stack->le_advertisements_channel_map = channel_map; 6021 hci_stack->le_advertisements_filter_policy = filter_policy; 6022 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6023 6); 6024 6025 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6026 hci_run(); 6027 } 6028 6029 /** 6030 * @brief Enable/Disable Advertisements 6031 * @param enabled 6032 */ 6033 void gap_advertisements_enable(int enabled){ 6034 hci_stack->le_advertisements_enabled = enabled != 0; 6035 hci_update_advertisements_enabled_for_current_roles(); 6036 hci_run(); 6037 } 6038 6039 #endif 6040 6041 void hci_le_set_own_address_type(uint8_t own_address_type){ 6042 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6043 if (own_address_type == hci_stack->le_own_addr_type) return; 6044 hci_stack->le_own_addr_type = own_address_type; 6045 6046 #ifdef ENABLE_LE_PERIPHERAL 6047 // update advertisement parameters, too 6048 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6049 hci_run(); 6050 #endif 6051 #ifdef ENABLE_LE_CENTRAL 6052 // note: we don't update scan parameters or modify ongoing connection attempts 6053 #endif 6054 } 6055 6056 void hci_le_random_address_set(const bd_addr_t random_address){ 6057 memcpy(hci_stack->le_random_address, random_address, 6); 6058 hci_stack->le_random_address_set = true; 6059 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6060 hci_run(); 6061 } 6062 6063 #endif 6064 6065 uint8_t gap_disconnect(hci_con_handle_t handle){ 6066 hci_connection_t * conn = hci_connection_for_handle(handle); 6067 if (!conn){ 6068 hci_emit_disconnection_complete(handle, 0); 6069 return 0; 6070 } 6071 // ignore if already disconnected 6072 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6073 return 0; 6074 } 6075 conn->state = SEND_DISCONNECT; 6076 hci_run(); 6077 return 0; 6078 } 6079 6080 int gap_read_rssi(hci_con_handle_t con_handle){ 6081 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6082 if (hci_connection == NULL) return 0; 6083 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6084 hci_run(); 6085 return 1; 6086 } 6087 6088 /** 6089 * @brief Get connection type 6090 * @param con_handle 6091 * @result connection_type 6092 */ 6093 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6094 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6095 if (!conn) return GAP_CONNECTION_INVALID; 6096 switch (conn->address_type){ 6097 case BD_ADDR_TYPE_LE_PUBLIC: 6098 case BD_ADDR_TYPE_LE_RANDOM: 6099 return GAP_CONNECTION_LE; 6100 case BD_ADDR_TYPE_SCO: 6101 return GAP_CONNECTION_SCO; 6102 case BD_ADDR_TYPE_ACL: 6103 return GAP_CONNECTION_ACL; 6104 default: 6105 return GAP_CONNECTION_INVALID; 6106 } 6107 } 6108 6109 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6110 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6111 if (!conn) return HCI_ROLE_INVALID; 6112 return (hci_role_t) conn->role; 6113 } 6114 6115 6116 #ifdef ENABLE_CLASSIC 6117 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6118 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6119 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6120 conn->request_role = role; 6121 hci_run(); 6122 return ERROR_CODE_SUCCESS; 6123 } 6124 #endif 6125 6126 #ifdef ENABLE_BLE 6127 6128 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){ 6129 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6130 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6131 6132 conn->le_phy_update_all_phys = all_phys; 6133 conn->le_phy_update_tx_phys = tx_phys; 6134 conn->le_phy_update_rx_phys = rx_phys; 6135 conn->le_phy_update_phy_options = phy_options; 6136 6137 hci_run(); 6138 6139 return 0; 6140 } 6141 6142 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6143 // check if already in list 6144 btstack_linked_list_iterator_t it; 6145 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6146 while (btstack_linked_list_iterator_has_next(&it)) { 6147 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6148 if (entry->address_type != address_type) { 6149 continue; 6150 } 6151 if (memcmp(entry->address, address, 6) != 0) { 6152 continue; 6153 } 6154 // disallow if already scheduled to add 6155 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6156 return ERROR_CODE_COMMAND_DISALLOWED; 6157 } 6158 // still on controller, but scheduled to remove -> re-add 6159 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6160 return ERROR_CODE_SUCCESS; 6161 } 6162 // alloc and add to list 6163 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6164 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6165 entry->address_type = address_type; 6166 (void)memcpy(entry->address, address, 6); 6167 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6168 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6169 return ERROR_CODE_SUCCESS; 6170 } 6171 6172 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6173 btstack_linked_list_iterator_t it; 6174 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6175 while (btstack_linked_list_iterator_has_next(&it)){ 6176 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6177 if (entry->address_type != address_type) { 6178 continue; 6179 } 6180 if (memcmp(entry->address, address, 6) != 0) { 6181 continue; 6182 } 6183 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6184 // remove from controller if already present 6185 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6186 } else { 6187 // directly remove entry from whitelist 6188 btstack_linked_list_iterator_remove(&it); 6189 btstack_memory_whitelist_entry_free(entry); 6190 } 6191 return ERROR_CODE_SUCCESS; 6192 } 6193 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6194 } 6195 6196 static void hci_whitelist_clear(void){ 6197 btstack_linked_list_iterator_t it; 6198 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6199 while (btstack_linked_list_iterator_has_next(&it)){ 6200 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6201 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6202 // remove from controller if already present 6203 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6204 continue; 6205 } 6206 // directly remove entry from whitelist 6207 btstack_linked_list_iterator_remove(&it); 6208 btstack_memory_whitelist_entry_free(entry); 6209 } 6210 } 6211 6212 /** 6213 * @brief Clear Whitelist 6214 * @returns 0 if ok 6215 */ 6216 uint8_t gap_whitelist_clear(void){ 6217 hci_whitelist_clear(); 6218 hci_run(); 6219 return ERROR_CODE_SUCCESS; 6220 } 6221 6222 /** 6223 * @brief Add Device to Whitelist 6224 * @param address_typ 6225 * @param address 6226 * @returns 0 if ok 6227 */ 6228 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6229 uint8_t status = hci_whitelist_add(address_type, address); 6230 if (status){ 6231 return status; 6232 } 6233 hci_run(); 6234 return ERROR_CODE_SUCCESS; 6235 } 6236 6237 /** 6238 * @brief Remove Device from Whitelist 6239 * @param address_typ 6240 * @param address 6241 * @returns 0 if ok 6242 */ 6243 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6244 uint8_t status = hci_whitelist_remove(address_type, address); 6245 if (status){ 6246 return status; 6247 } 6248 hci_run(); 6249 return ERROR_CODE_SUCCESS; 6250 } 6251 6252 #ifdef ENABLE_LE_CENTRAL 6253 /** 6254 * @brief Connect with Whitelist 6255 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6256 * @returns - if ok 6257 */ 6258 uint8_t gap_connect_with_whitelist(void){ 6259 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6260 return ERROR_CODE_COMMAND_DISALLOWED; 6261 } 6262 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6263 hci_run(); 6264 return ERROR_CODE_SUCCESS; 6265 } 6266 6267 /** 6268 * @brief Auto Connection Establishment - Start Connecting to device 6269 * @param address_typ 6270 * @param address 6271 * @returns 0 if ok 6272 */ 6273 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6274 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6275 return ERROR_CODE_COMMAND_DISALLOWED; 6276 } 6277 6278 uint8_t status = hci_whitelist_add(address_type, address); 6279 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6280 return status; 6281 } 6282 6283 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6284 6285 hci_run(); 6286 return ERROR_CODE_SUCCESS; 6287 } 6288 6289 /** 6290 * @brief Auto Connection Establishment - Stop Connecting to device 6291 * @param address_typ 6292 * @param address 6293 * @returns 0 if ok 6294 */ 6295 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6296 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6297 return ERROR_CODE_COMMAND_DISALLOWED; 6298 } 6299 6300 hci_whitelist_remove(address_type, address); 6301 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6302 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6303 } 6304 hci_run(); 6305 return 0; 6306 } 6307 6308 /** 6309 * @brief Auto Connection Establishment - Stop everything 6310 * @note Convenience function to stop all active auto connection attempts 6311 */ 6312 uint8_t gap_auto_connection_stop_all(void){ 6313 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6314 return ERROR_CODE_COMMAND_DISALLOWED; 6315 } 6316 hci_whitelist_clear(); 6317 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6318 hci_run(); 6319 return ERROR_CODE_SUCCESS; 6320 } 6321 6322 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6323 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6324 if (!conn) return 0; 6325 return conn->le_connection_interval; 6326 } 6327 #endif 6328 #endif 6329 6330 #ifdef ENABLE_CLASSIC 6331 /** 6332 * @brief Set Extended Inquiry Response data 6333 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6334 * @note has to be done before stack starts up 6335 */ 6336 void gap_set_extended_inquiry_response(const uint8_t * data){ 6337 hci_stack->eir_data = data; 6338 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6339 hci_run(); 6340 } 6341 6342 /** 6343 * @brief Start GAP Classic Inquiry 6344 * @param duration in 1.28s units 6345 * @return 0 if ok 6346 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6347 */ 6348 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6349 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6350 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6351 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6352 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6353 } 6354 hci_stack->inquiry_state = duration_in_1280ms_units; 6355 hci_run(); 6356 return 0; 6357 } 6358 6359 /** 6360 * @brief Stop GAP Classic Inquiry 6361 * @returns 0 if ok 6362 */ 6363 int gap_inquiry_stop(void){ 6364 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6365 // emit inquiry complete event, before it even started 6366 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6367 hci_emit_event(event, sizeof(event), 1); 6368 return 0; 6369 } 6370 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6371 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6372 hci_run(); 6373 return 0; 6374 } 6375 6376 void gap_inquiry_set_lap(uint32_t lap){ 6377 hci_stack->inquiry_lap = lap; 6378 } 6379 6380 6381 /** 6382 * @brief Remote Name Request 6383 * @param addr 6384 * @param page_scan_repetition_mode 6385 * @param clock_offset only used when bit 15 is set 6386 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6387 */ 6388 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6389 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6390 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6391 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6392 hci_stack->remote_name_clock_offset = clock_offset; 6393 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6394 hci_run(); 6395 return 0; 6396 } 6397 6398 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6399 hci_stack->gap_pairing_state = state; 6400 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6401 hci_run(); 6402 return 0; 6403 } 6404 6405 /** 6406 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6407 * @param addr 6408 * @param pin_data 6409 * @param pin_len 6410 * @return 0 if ok 6411 */ 6412 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6413 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6414 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6415 hci_stack->gap_pairing_pin_len = pin_len; 6416 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6417 } 6418 6419 /** 6420 * @brief Legacy Pairing Pin Code Response 6421 * @param addr 6422 * @param pin 6423 * @return 0 if ok 6424 */ 6425 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6426 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6427 } 6428 6429 /** 6430 * @brief Abort Legacy Pairing 6431 * @param addr 6432 * @param pin 6433 * @return 0 if ok 6434 */ 6435 int gap_pin_code_negative(bd_addr_t addr){ 6436 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6437 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6438 } 6439 6440 /** 6441 * @brief SSP Passkey Response 6442 * @param addr 6443 * @param passkey 6444 * @return 0 if ok 6445 */ 6446 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6447 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6448 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6449 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6450 } 6451 6452 /** 6453 * @brief Abort SSP Passkey Entry/Pairing 6454 * @param addr 6455 * @param pin 6456 * @return 0 if ok 6457 */ 6458 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6459 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6460 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6461 } 6462 6463 /** 6464 * @brief Accept SSP Numeric Comparison 6465 * @param addr 6466 * @param passkey 6467 * @return 0 if ok 6468 */ 6469 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6470 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6471 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6472 } 6473 6474 /** 6475 * @brief Abort SSP Numeric Comparison/Pairing 6476 * @param addr 6477 * @param pin 6478 * @return 0 if ok 6479 */ 6480 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6481 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6482 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6483 } 6484 6485 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6486 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6487 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6488 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6489 connectionSetAuthenticationFlags(conn, flag); 6490 hci_run(); 6491 return ERROR_CODE_SUCCESS; 6492 } 6493 #endif 6494 6495 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6496 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6497 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6498 } 6499 6500 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6501 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6502 } 6503 #endif 6504 6505 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6506 /** 6507 * @brief Report Remote OOB Data 6508 * @param bd_addr 6509 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6510 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6511 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6512 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6513 */ 6514 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){ 6515 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6516 if (connection == NULL) { 6517 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6518 } 6519 connection->classic_oob_c_192 = c_192; 6520 connection->classic_oob_r_192 = r_192; 6521 6522 // ignore P-256 if not supported by us 6523 if (hci_stack->secure_connections_active){ 6524 connection->classic_oob_c_256 = c_256; 6525 connection->classic_oob_r_256 = r_256; 6526 } 6527 6528 return ERROR_CODE_SUCCESS; 6529 } 6530 /** 6531 * @brief Generate new OOB data 6532 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6533 */ 6534 void gap_ssp_generate_oob_data(void){ 6535 hci_stack->classic_read_local_oob_data = true; 6536 hci_run(); 6537 } 6538 6539 #endif 6540 6541 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6542 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6543 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6544 if (connection == NULL) { 6545 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6546 } 6547 6548 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6549 connection->link_key_type = type; 6550 6551 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6552 } 6553 6554 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6555 /** 6556 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6557 * @param inquiry_mode see bluetooth_defines.h 6558 */ 6559 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6560 hci_stack->inquiry_mode = inquiry_mode; 6561 } 6562 6563 /** 6564 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6565 */ 6566 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6567 hci_stack->sco_voice_setting = voice_setting; 6568 } 6569 6570 /** 6571 * @brief Get SCO Voice Setting 6572 * @return current voice setting 6573 */ 6574 uint16_t hci_get_sco_voice_setting(void){ 6575 return hci_stack->sco_voice_setting; 6576 } 6577 6578 static int hci_have_usb_transport(void){ 6579 if (!hci_stack->hci_transport) return 0; 6580 const char * transport_name = hci_stack->hci_transport->name; 6581 if (!transport_name) return 0; 6582 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6583 } 6584 6585 /** @brief Get SCO packet length for current SCO Voice setting 6586 * @note Using SCO packets of the exact length is required for USB transfer 6587 * @return Length of SCO packets in bytes (not audio frames) 6588 */ 6589 uint16_t hci_get_sco_packet_length(void){ 6590 uint16_t sco_packet_length = 0; 6591 6592 #ifdef ENABLE_SCO_OVER_HCI 6593 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6594 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6595 6596 if (hci_have_usb_transport()){ 6597 // see Core Spec for H2 USB Transfer. 6598 // 3 byte SCO header + 24 bytes per connection 6599 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6600 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6601 } else { 6602 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6603 sco_packet_length = 3 + 60 * multiplier; 6604 // assert that it still fits inside an SCO buffer 6605 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6606 sco_packet_length = 3 + 60; 6607 } 6608 } 6609 #endif 6610 6611 #ifdef HAVE_SCO_TRANSPORT 6612 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6613 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6614 sco_packet_length = 3 + 60 * multiplier; 6615 #endif 6616 return sco_packet_length; 6617 } 6618 6619 /** 6620 * @brief Sets the master/slave policy 6621 * @param policy (0: attempt to become master, 1: let connecting device decide) 6622 */ 6623 void hci_set_master_slave_policy(uint8_t policy){ 6624 hci_stack->master_slave_policy = policy; 6625 } 6626 6627 #endif 6628 6629 HCI_STATE hci_get_state(void){ 6630 return hci_stack->state; 6631 } 6632 6633 #ifdef ENABLE_CLASSIC 6634 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6635 hci_stack->gap_classic_accept_callback = accept_callback; 6636 } 6637 #endif 6638 6639 /** 6640 * @brief Set callback for Bluetooth Hardware Error 6641 */ 6642 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6643 hci_stack->hardware_error_callback = fn; 6644 } 6645 6646 void hci_disconnect_all(void){ 6647 btstack_linked_list_iterator_t it; 6648 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6649 while (btstack_linked_list_iterator_has_next(&it)){ 6650 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6651 if (con->state == SENT_DISCONNECT) continue; 6652 con->state = SEND_DISCONNECT; 6653 } 6654 hci_run(); 6655 } 6656 6657 uint16_t hci_get_manufacturer(void){ 6658 return hci_stack->manufacturer; 6659 } 6660 6661 #ifdef ENABLE_BLE 6662 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6663 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6664 if (!hci_con) return NULL; 6665 return &hci_con->sm_connection; 6666 } 6667 6668 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6669 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6670 #endif 6671 6672 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6673 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6674 if (hci_connection == NULL) return 0; 6675 if (hci_is_le_connection(hci_connection)){ 6676 #ifdef ENABLE_BLE 6677 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6678 if (sm_conn->sm_connection_encrypted) { 6679 return sm_conn->sm_actual_encryption_key_size; 6680 } 6681 #endif 6682 } else { 6683 #ifdef ENABLE_CLASSIC 6684 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6685 return hci_connection->encryption_key_size; 6686 } 6687 #endif 6688 } 6689 return 0; 6690 } 6691 6692 int gap_authenticated(hci_con_handle_t con_handle){ 6693 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6694 if (hci_connection == NULL) return 0; 6695 6696 switch (hci_connection->address_type){ 6697 #ifdef ENABLE_BLE 6698 case BD_ADDR_TYPE_LE_PUBLIC: 6699 case BD_ADDR_TYPE_LE_RANDOM: 6700 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6701 return hci_connection->sm_connection.sm_connection_authenticated; 6702 #endif 6703 #ifdef ENABLE_CLASSIC 6704 case BD_ADDR_TYPE_SCO: 6705 case BD_ADDR_TYPE_ACL: 6706 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6707 #endif 6708 default: 6709 return 0; 6710 } 6711 } 6712 6713 int gap_secure_connection(hci_con_handle_t con_handle){ 6714 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6715 if (hci_connection == NULL) return 0; 6716 6717 switch (hci_connection->address_type){ 6718 #ifdef ENABLE_BLE 6719 case BD_ADDR_TYPE_LE_PUBLIC: 6720 case BD_ADDR_TYPE_LE_RANDOM: 6721 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6722 return hci_connection->sm_connection.sm_connection_sc; 6723 #endif 6724 #ifdef ENABLE_CLASSIC 6725 case BD_ADDR_TYPE_SCO: 6726 case BD_ADDR_TYPE_ACL: 6727 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6728 #endif 6729 default: 6730 return 0; 6731 } 6732 } 6733 6734 bool gap_bonded(hci_con_handle_t con_handle){ 6735 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6736 if (hci_connection == NULL) return 0; 6737 6738 #ifdef ENABLE_CLASSIC 6739 link_key_t link_key; 6740 link_key_type_t link_key_type; 6741 #endif 6742 switch (hci_connection->address_type){ 6743 #ifdef ENABLE_BLE 6744 case BD_ADDR_TYPE_LE_PUBLIC: 6745 case BD_ADDR_TYPE_LE_RANDOM: 6746 return hci_connection->sm_connection.sm_le_db_index >= 0; 6747 #endif 6748 #ifdef ENABLE_CLASSIC 6749 case BD_ADDR_TYPE_SCO: 6750 case BD_ADDR_TYPE_ACL: 6751 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6752 #endif 6753 default: 6754 return false; 6755 } 6756 } 6757 6758 #ifdef ENABLE_BLE 6759 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6760 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6761 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6762 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6763 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6764 return sm_conn->sm_connection_authorization_state; 6765 } 6766 #endif 6767 6768 #ifdef ENABLE_CLASSIC 6769 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){ 6770 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6771 if (!conn) return GAP_CONNECTION_INVALID; 6772 conn->sniff_min_interval = sniff_min_interval; 6773 conn->sniff_max_interval = sniff_max_interval; 6774 conn->sniff_attempt = sniff_attempt; 6775 conn->sniff_timeout = sniff_timeout; 6776 hci_run(); 6777 return 0; 6778 } 6779 6780 /** 6781 * @brief Exit Sniff mode 6782 * @param con_handle 6783 @ @return 0 if ok 6784 */ 6785 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6786 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6787 if (!conn) return GAP_CONNECTION_INVALID; 6788 conn->sniff_min_interval = 0xffff; 6789 hci_run(); 6790 return 0; 6791 } 6792 6793 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){ 6794 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6795 if (!conn) return GAP_CONNECTION_INVALID; 6796 conn->sniff_subrating_max_latency = max_latency; 6797 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6798 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6799 hci_run(); 6800 return ERROR_CODE_SUCCESS; 6801 } 6802 6803 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){ 6804 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6805 if (!conn) return GAP_CONNECTION_INVALID; 6806 conn->qos_service_type = service_type; 6807 conn->qos_token_rate = token_rate; 6808 conn->qos_peak_bandwidth = peak_bandwidth; 6809 conn->qos_latency = latency; 6810 conn->qos_delay_variation = delay_variation; 6811 hci_run(); 6812 return ERROR_CODE_SUCCESS; 6813 } 6814 6815 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6816 hci_stack->new_page_scan_interval = page_scan_interval; 6817 hci_stack->new_page_scan_window = page_scan_window; 6818 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6819 hci_run(); 6820 } 6821 6822 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6823 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6824 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6825 hci_run(); 6826 } 6827 6828 #endif 6829 6830 void hci_halting_defer(void){ 6831 if (hci_stack->state != HCI_STATE_HALTING) return; 6832 switch (hci_stack->substate){ 6833 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6834 case HCI_HALTING_CLOSE: 6835 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6836 break; 6837 default: 6838 break; 6839 } 6840 } 6841 6842 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6843 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6844 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6845 if (le_device_db_index >= le_device_db_max_count()) return; 6846 uint8_t offset = le_device_db_index >> 3; 6847 uint8_t mask = 1 << (le_device_db_index & 7); 6848 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6849 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6850 // note: go back to remove entries, otherwise, a remove + add will skip the add 6851 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6852 } 6853 } 6854 6855 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6856 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6857 if (le_device_db_index >= le_device_db_max_count()) return; 6858 uint8_t offset = le_device_db_index >> 3; 6859 uint8_t mask = 1 << (le_device_db_index & 7); 6860 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6861 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6862 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6863 } 6864 } 6865 6866 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6867 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6868 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6869 } 6870 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6871 // restart le resolving list update 6872 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6873 } 6874 return ERROR_CODE_SUCCESS; 6875 } 6876 #endif 6877 6878 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6879 void hci_setup_test_connections_fuzz(void){ 6880 hci_connection_t * conn; 6881 6882 // default address: 66:55:44:33:00:01 6883 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6884 6885 // setup Controller info 6886 hci_stack->num_cmd_packets = 255; 6887 hci_stack->acl_packets_total_num = 255; 6888 6889 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6890 addr[5] = 0x01; 6891 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6892 conn->con_handle = addr[5]; 6893 conn->role = HCI_ROLE_SLAVE; 6894 conn->state = RECEIVED_CONNECTION_REQUEST; 6895 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6896 6897 // setup incoming Classic SCO connection with con handle 0x0002 6898 addr[5] = 0x02; 6899 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6900 conn->con_handle = addr[5]; 6901 conn->role = HCI_ROLE_SLAVE; 6902 conn->state = RECEIVED_CONNECTION_REQUEST; 6903 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6904 6905 // setup ready Classic ACL connection with con handle 0x0003 6906 addr[5] = 0x03; 6907 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6908 conn->con_handle = addr[5]; 6909 conn->role = HCI_ROLE_SLAVE; 6910 conn->state = OPEN; 6911 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6912 6913 // setup ready Classic SCO connection with con handle 0x0004 6914 addr[5] = 0x04; 6915 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6916 conn->con_handle = addr[5]; 6917 conn->role = HCI_ROLE_SLAVE; 6918 conn->state = OPEN; 6919 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6920 6921 // setup ready LE ACL connection with con handle 0x005 and public address 6922 addr[5] = 0x05; 6923 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6924 conn->con_handle = addr[5]; 6925 conn->role = HCI_ROLE_SLAVE; 6926 conn->state = OPEN; 6927 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6928 conn->sm_connection.sm_connection_encrypted = 1; 6929 } 6930 6931 void hci_free_connections_fuzz(void){ 6932 btstack_linked_list_iterator_t it; 6933 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6934 while (btstack_linked_list_iterator_has_next(&it)){ 6935 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6936 btstack_linked_list_iterator_remove(&it); 6937 btstack_memory_hci_connection_free(con); 6938 } 6939 } 6940 void hci_simulate_working_fuzz(void){ 6941 hci_init_done(); 6942 hci_stack->num_cmd_packets = 255; 6943 } 6944 #endif 6945