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 #ifdef ENABLE_CLASSIC 1428 // init sequence complete, check if GAP Tasks are completed 1429 if (hci_stack->gap_tasks != 0) { 1430 hci_run_gap_tasks_classic(); 1431 return; 1432 } 1433 #endif 1434 1435 // done. tell the app 1436 log_info("hci_init_done -> HCI_STATE_WORKING"); 1437 hci_stack->state = HCI_STATE_WORKING; 1438 hci_emit_state(); 1439 hci_run(); 1440 } 1441 1442 // assumption: hci_can_send_command_packet_now() == true 1443 static void hci_initializing_run(void){ 1444 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1445 1446 bool need_baud_change = false; 1447 1448 #ifndef HAVE_HOST_CONTROLLER_API 1449 need_baud_change = hci_stack->config 1450 && hci_stack->chipset 1451 && hci_stack->chipset->set_baudrate_command 1452 && hci_stack->hci_transport->set_baudrate 1453 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1454 #endif 1455 1456 switch (hci_stack->substate){ 1457 case HCI_INIT_SEND_RESET: 1458 hci_state_reset(); 1459 1460 #ifndef HAVE_HOST_CONTROLLER_API 1461 // prepare reset if command complete not received in 100ms 1462 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1463 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1464 btstack_run_loop_add_timer(&hci_stack->timeout); 1465 #endif 1466 // send command 1467 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1468 hci_send_cmd(&hci_reset); 1469 break; 1470 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1471 hci_send_cmd(&hci_read_local_version_information); 1472 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1473 break; 1474 case HCI_INIT_SEND_READ_LOCAL_NAME: 1475 hci_send_cmd(&hci_read_local_name); 1476 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1477 break; 1478 1479 #ifndef HAVE_HOST_CONTROLLER_API 1480 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1481 hci_state_reset(); 1482 // prepare reset if command complete not received in 100ms 1483 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1484 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1485 btstack_run_loop_add_timer(&hci_stack->timeout); 1486 // send command 1487 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1488 hci_send_cmd(&hci_reset); 1489 break; 1490 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1491 hci_state_reset(); 1492 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1493 hci_send_cmd(&hci_reset); 1494 break; 1495 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1496 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1497 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1498 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1499 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1500 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1501 break; 1502 } 1503 case HCI_INIT_SET_BD_ADDR: 1504 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1505 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1506 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1507 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1508 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1509 break; 1510 case HCI_INIT_SEND_BAUD_CHANGE: 1511 if (need_baud_change) { 1512 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1513 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1514 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1515 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1516 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1517 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1518 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1519 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1520 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1521 btstack_run_loop_add_timer(&hci_stack->timeout); 1522 } 1523 break; 1524 } 1525 1526 /* fall through */ 1527 1528 case HCI_INIT_CUSTOM_INIT: 1529 // Custom initialization 1530 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1531 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1532 bool send_cmd = false; 1533 switch (hci_stack->chipset_result){ 1534 case BTSTACK_CHIPSET_VALID_COMMAND: 1535 send_cmd = true; 1536 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1537 break; 1538 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1539 send_cmd = true; 1540 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1541 log_info("CSR Warm Boot"); 1542 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1543 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1544 btstack_run_loop_add_timer(&hci_stack->timeout); 1545 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1546 && hci_stack->config 1547 && hci_stack->chipset 1548 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1549 && hci_stack->hci_transport->set_baudrate 1550 && hci_transport_uart_get_main_baud_rate()){ 1551 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1552 } else { 1553 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1554 } 1555 break; 1556 default: 1557 break; 1558 } 1559 1560 if (send_cmd){ 1561 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1562 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1563 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1564 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1565 break; 1566 } 1567 log_info("Init script done"); 1568 1569 // Init script download on Broadcom chipsets causes: 1570 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1571 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1572 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1573 1574 // - baud rate to reset, restore UART baud rate if needed 1575 if (need_baud_change) { 1576 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1577 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1578 hci_stack->hci_transport->set_baudrate(baud_rate); 1579 } 1580 1581 uint16_t bcm_delay_ms = 300; 1582 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1583 // -> Work around: wait here. 1584 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1585 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1586 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1587 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1588 btstack_run_loop_add_timer(&hci_stack->timeout); 1589 break; 1590 } 1591 } 1592 /* fall through */ 1593 #endif 1594 1595 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1596 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1597 hci_send_cmd(&hci_read_local_supported_commands); 1598 break; 1599 case HCI_INIT_READ_BD_ADDR: 1600 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1601 hci_send_cmd(&hci_read_bd_addr); 1602 break; 1603 case HCI_INIT_READ_BUFFER_SIZE: 1604 // only read buffer size if supported 1605 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1606 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1607 hci_send_cmd(&hci_read_buffer_size); 1608 break; 1609 } 1610 /* fall through */ 1611 1612 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1613 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1614 hci_send_cmd(&hci_read_local_supported_features); 1615 break; 1616 1617 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1618 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1619 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1620 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1621 break; 1622 case HCI_INIT_HOST_BUFFER_SIZE: 1623 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1624 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1625 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1626 break; 1627 #endif 1628 1629 case HCI_INIT_SET_EVENT_MASK: 1630 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1631 if (hci_le_supported()){ 1632 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1633 } else { 1634 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1635 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1636 } 1637 break; 1638 1639 #ifdef ENABLE_CLASSIC 1640 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1641 if (hci_classic_supported() && gap_ssp_supported()){ 1642 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1643 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1644 break; 1645 } 1646 /* fall through */ 1647 1648 case HCI_INIT_WRITE_INQUIRY_MODE: 1649 if (hci_classic_supported()){ 1650 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1651 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1652 break; 1653 } 1654 /* fall through */ 1655 1656 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1657 // skip write secure connections host support if not supported or disabled 1658 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1659 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1660 hci_stack->secure_connections_active = true; 1661 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1662 break; 1663 } 1664 /* fall through */ 1665 1666 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1667 if (hci_classic_supported()){ 1668 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1669 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1670 break; 1671 } 1672 /* fall through */ 1673 1674 // only sent if ENABLE_SCO_OVER_HCI is defined 1675 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1676 if (hci_classic_supported()){ 1677 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1678 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1679 break; 1680 } 1681 /* fall through */ 1682 1683 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1684 if (hci_classic_supported()){ 1685 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1686 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1687 break; 1688 } 1689 /* fall through */ 1690 1691 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1692 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1693 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1694 if (hci_classic_supported()){ 1695 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1696 #ifdef ENABLE_SCO_OVER_HCI 1697 log_info("BCM: Route SCO data via HCI transport"); 1698 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1699 #endif 1700 #ifdef ENABLE_SCO_OVER_PCM 1701 log_info("BCM: Route SCO data via PCM interface"); 1702 #ifdef ENABLE_BCM_PCM_WBS 1703 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1704 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1705 #else 1706 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1707 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1708 #endif 1709 #endif 1710 break; 1711 } 1712 /* fall through */ 1713 #endif 1714 1715 #ifdef ENABLE_SCO_OVER_PCM 1716 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1717 if (hci_classic_supported()){ 1718 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1719 log_info("BCM: Config PCM interface for I2S"); 1720 #ifdef ENABLE_BCM_PCM_WBS 1721 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1722 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1723 #else 1724 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1725 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1726 #endif 1727 break; 1728 } 1729 /* fall through */ 1730 #endif 1731 #endif 1732 1733 #ifdef ENABLE_BLE 1734 // LE INIT 1735 case HCI_INIT_LE_READ_BUFFER_SIZE: 1736 if (hci_le_supported()){ 1737 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1738 hci_send_cmd(&hci_le_read_buffer_size); 1739 break; 1740 } 1741 /* fall through */ 1742 1743 case HCI_INIT_LE_SET_EVENT_MASK: 1744 if (hci_le_supported()){ 1745 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1746 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1747 break; 1748 } 1749 /* fall through */ 1750 1751 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1752 if (hci_le_supported()){ 1753 // LE Supported Host = 1, Simultaneous Host = 0 1754 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1755 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1756 break; 1757 } 1758 /* fall through */ 1759 1760 #endif 1761 1762 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1763 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1764 if (hci_le_supported()){ 1765 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1766 hci_send_cmd(&hci_le_read_maximum_data_length); 1767 break; 1768 } 1769 /* fall through */ 1770 1771 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1772 if (hci_le_supported()){ 1773 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1774 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1775 break; 1776 } 1777 /* fall through */ 1778 #endif 1779 1780 #ifdef ENABLE_LE_CENTRAL 1781 case HCI_INIT_READ_WHITE_LIST_SIZE: 1782 if (hci_le_supported()){ 1783 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1784 hci_send_cmd(&hci_le_read_white_list_size); 1785 break; 1786 } 1787 /* fall through */ 1788 1789 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1790 if (hci_le_supported()){ 1791 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1792 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); 1793 break; 1794 } 1795 /* fall through */ 1796 #endif 1797 case HCI_INIT_DONE: 1798 hci_init_done(); 1799 break; 1800 1801 default: 1802 return; 1803 } 1804 } 1805 1806 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1807 bool command_completed = false; 1808 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1809 uint16_t opcode = little_endian_read_16(packet,3); 1810 if (opcode == hci_stack->last_cmd_opcode){ 1811 command_completed = true; 1812 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1813 } else { 1814 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1815 } 1816 } 1817 1818 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1819 uint8_t status = packet[2]; 1820 uint16_t opcode = little_endian_read_16(packet,4); 1821 if (opcode == hci_stack->last_cmd_opcode){ 1822 if (status){ 1823 command_completed = true; 1824 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1825 } else { 1826 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1827 } 1828 } else { 1829 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1830 } 1831 } 1832 #ifndef HAVE_HOST_CONTROLLER_API 1833 // Vendor == CSR 1834 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1835 // TODO: track actual command 1836 command_completed = true; 1837 } 1838 1839 // Vendor == Toshiba 1840 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1841 // TODO: track actual command 1842 command_completed = true; 1843 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1844 hci_stack->num_cmd_packets = 1; 1845 } 1846 #endif 1847 1848 return command_completed; 1849 } 1850 1851 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1852 1853 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1854 1855 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1856 1857 #ifndef HAVE_HOST_CONTROLLER_API 1858 1859 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1860 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1861 // 1862 // HCI Reset 1863 // Timeout 100 ms 1864 // HCI Reset 1865 // Command Complete Reset 1866 // HCI Read Local Version Information 1867 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1868 // hang... 1869 // 1870 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1871 if (!command_completed 1872 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1873 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1874 1875 uint16_t opcode = little_endian_read_16(packet,3); 1876 if (opcode == hci_reset.opcode){ 1877 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1878 return; 1879 } 1880 } 1881 1882 // CSR & H5 1883 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1884 if (!command_completed 1885 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1886 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1887 1888 uint16_t opcode = little_endian_read_16(packet,3); 1889 if (opcode == hci_reset.opcode){ 1890 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1891 return; 1892 } 1893 } 1894 1895 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1896 // fix: Correct substate and behave as command below 1897 if (command_completed){ 1898 switch (hci_stack->substate){ 1899 case HCI_INIT_SEND_RESET: 1900 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1901 break; 1902 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1903 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1904 break; 1905 default: 1906 break; 1907 } 1908 } 1909 1910 #endif 1911 1912 if (!command_completed) return; 1913 1914 bool need_baud_change = false; 1915 bool need_addr_change = false; 1916 1917 #ifndef HAVE_HOST_CONTROLLER_API 1918 need_baud_change = hci_stack->config 1919 && hci_stack->chipset 1920 && hci_stack->chipset->set_baudrate_command 1921 && hci_stack->hci_transport->set_baudrate 1922 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1923 1924 need_addr_change = hci_stack->custom_bd_addr_set 1925 && hci_stack->chipset 1926 && hci_stack->chipset->set_bd_addr_command; 1927 #endif 1928 1929 switch(hci_stack->substate){ 1930 1931 #ifndef HAVE_HOST_CONTROLLER_API 1932 case HCI_INIT_SEND_RESET: 1933 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1934 // fix: just correct substate and behave as command below 1935 1936 /* fall through */ 1937 #endif 1938 1939 case HCI_INIT_W4_SEND_RESET: 1940 btstack_run_loop_remove_timer(&hci_stack->timeout); 1941 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1942 return; 1943 1944 #ifndef HAVE_HOST_CONTROLLER_API 1945 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1946 // for STLC2500D, baud rate change already happened. 1947 // for others, baud rate gets changed now 1948 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1949 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1950 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1951 hci_stack->hci_transport->set_baudrate(baud_rate); 1952 } 1953 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1954 return; 1955 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1956 btstack_run_loop_remove_timer(&hci_stack->timeout); 1957 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1958 return; 1959 case HCI_INIT_W4_CUSTOM_INIT: 1960 // repeat custom init 1961 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1962 return; 1963 #endif 1964 1965 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1966 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1967 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1968 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1969 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1970 return; 1971 } 1972 if (need_addr_change){ 1973 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1974 return; 1975 } 1976 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1977 return; 1978 #ifndef HAVE_HOST_CONTROLLER_API 1979 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1980 if (need_baud_change){ 1981 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1982 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1983 hci_stack->hci_transport->set_baudrate(baud_rate); 1984 } 1985 if (need_addr_change){ 1986 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1987 return; 1988 } 1989 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1990 return; 1991 case HCI_INIT_W4_SET_BD_ADDR: 1992 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1993 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1994 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1995 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1996 return; 1997 } 1998 // skipping st warm boot 1999 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2000 return; 2001 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2002 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2003 return; 2004 #endif 2005 2006 #ifdef ENABLE_BLE 2007 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 2008 // skip write le host if not supported (e.g. on LE only EM9301) 2009 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 2010 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 2011 return; 2012 2013 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2014 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 2015 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 2016 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 2017 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 2018 return; 2019 } 2020 // explicit fall through to reduce repetitions 2021 2022 #ifdef ENABLE_LE_CENTRAL 2023 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 2024 #else 2025 hci_init_done(); 2026 #endif 2027 return; 2028 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 2029 2030 #endif /* ENABLE_BLE */ 2031 2032 #ifdef ENABLE_SCO_OVER_HCI 2033 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2034 // skip write synchronous flow control if not supported 2035 if (hci_stack->local_supported_commands[0] & 0x04) break; 2036 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2037 2038 /* fall through */ 2039 2040 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2041 // skip write default erroneous data reporting if not supported 2042 if (hci_stack->local_supported_commands[0] & 0x08) break; 2043 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2044 2045 /* fall through */ 2046 2047 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2048 // skip bcm set sco pcm config on non-Broadcom chipsets 2049 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 2050 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2051 2052 /* fall through */ 2053 2054 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 2055 if (!hci_le_supported()){ 2056 // SKIP LE init for Classic only configuration 2057 hci_init_done(); 2058 return; 2059 } 2060 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2061 break; 2062 2063 #else /* !ENABLE_SCO_OVER_HCI */ 2064 2065 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2066 #ifdef ENABLE_SCO_OVER_PCM 2067 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 2068 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 2069 return; 2070 } 2071 #endif 2072 /* fall through */ 2073 2074 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2075 #ifdef ENABLE_BLE 2076 if (hci_le_supported()){ 2077 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2078 return; 2079 } 2080 #endif 2081 // SKIP LE init for Classic only configuration 2082 hci_init_done(); 2083 return; 2084 #endif /* ENABLE_SCO_OVER_HCI */ 2085 2086 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2087 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2088 // Response to command before init done state -> init done 2089 case (HCI_INIT_DONE-1): 2090 hci_init_done(); 2091 return; 2092 #endif 2093 case HCI_INIT_DONE: 2094 return; 2095 2096 default: 2097 break; 2098 } 2099 hci_initializing_next_state(); 2100 } 2101 2102 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2103 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2104 bd_addr_t bd_address; 2105 (void)memcpy(&bd_address, conn->address, 6); 2106 2107 #ifdef ENABLE_CLASSIC 2108 // cache needed data 2109 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2110 #endif 2111 2112 // connection failed, remove entry 2113 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2114 btstack_memory_hci_connection_free( conn ); 2115 2116 #ifdef ENABLE_CLASSIC 2117 // notify client if dedicated bonding 2118 if (notify_dedicated_bonding_failed){ 2119 log_info("hci notify_dedicated_bonding_failed"); 2120 hci_emit_dedicated_bonding_result(bd_address, status); 2121 } 2122 2123 // if authentication error, also delete link key 2124 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2125 gap_drop_link_key_for_bd_addr(bd_address); 2126 } 2127 #else 2128 UNUSED(status); 2129 #endif 2130 } 2131 2132 #ifdef ENABLE_CLASSIC 2133 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2134 // SSP Controller 2135 if (features[6] & (1 << 3)){ 2136 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2137 } 2138 // eSCO 2139 if (features[3] & (1<<7)){ 2140 conn->remote_supported_features[0] |= 1; 2141 } 2142 // Extended features 2143 if (features[7] & (1<<7)){ 2144 conn->remote_supported_features[0] |= 2; 2145 } 2146 } 2147 2148 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2149 // SSP Host 2150 if (features[0] & (1 << 0)){ 2151 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2152 } 2153 // SC Host 2154 if (features[0] & (1 << 3)){ 2155 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2156 } 2157 } 2158 2159 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2160 // SC Controller 2161 if (features[1] & (1 << 0)){ 2162 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2163 } 2164 } 2165 2166 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2167 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2168 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2169 if (conn->bonding_flags & BONDING_DEDICATED){ 2170 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2171 } 2172 } 2173 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2174 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2175 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2176 } 2177 2178 #endif 2179 2180 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2181 // handle BT initialization 2182 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2183 hci_initializing_event_handler(packet, size); 2184 } 2185 2186 // help with BT sleep 2187 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2188 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2189 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2190 hci_initializing_next_state(); 2191 } 2192 } 2193 2194 #ifdef ENABLE_CLASSIC 2195 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2196 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2197 conn->encryption_key_size = encryption_key_size; 2198 2199 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2200 conn->requested_security_level = LEVEL_0; 2201 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2202 return; 2203 } 2204 2205 // Request Authentication if not already done 2206 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2207 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2208 } 2209 #endif 2210 2211 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2212 UNUSED(size); 2213 2214 uint16_t manufacturer; 2215 #ifdef ENABLE_CLASSIC 2216 hci_con_handle_t handle; 2217 hci_connection_t * conn; 2218 uint8_t status; 2219 #endif 2220 // get num cmd packets - limit to 1 to reduce complexity 2221 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2222 2223 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2224 switch (opcode){ 2225 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2226 if (packet[5]) break; 2227 // terminate, name 248 chars 2228 packet[6+248] = 0; 2229 log_info("local name: %s", &packet[6]); 2230 break; 2231 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2232 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2233 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2234 uint16_t acl_len = little_endian_read_16(packet, 6); 2235 uint16_t sco_len = packet[8]; 2236 2237 // determine usable ACL/SCO payload size 2238 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2239 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2240 2241 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2242 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2243 2244 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2245 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2246 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2247 } 2248 break; 2249 case HCI_OPCODE_HCI_READ_RSSI: 2250 if (packet[5] == ERROR_CODE_SUCCESS){ 2251 uint8_t event[5]; 2252 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2253 event[1] = 3; 2254 (void)memcpy(&event[2], &packet[6], 3); 2255 hci_emit_event(event, sizeof(event), 1); 2256 } 2257 break; 2258 #ifdef ENABLE_BLE 2259 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2260 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2261 hci_stack->le_acl_packets_total_num = packet[8]; 2262 // determine usable ACL payload size 2263 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2264 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2265 } 2266 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2267 break; 2268 #endif 2269 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2270 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2271 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2272 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2273 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); 2274 break; 2275 #endif 2276 #ifdef ENABLE_LE_CENTRAL 2277 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2278 hci_stack->le_whitelist_capacity = packet[6]; 2279 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2280 break; 2281 #endif 2282 case HCI_OPCODE_HCI_READ_BD_ADDR: 2283 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2284 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)); 2285 #ifdef ENABLE_CLASSIC 2286 if (hci_stack->link_key_db){ 2287 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2288 } 2289 #endif 2290 break; 2291 #ifdef ENABLE_CLASSIC 2292 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2293 hci_emit_discoverable_enabled(hci_stack->discoverable); 2294 break; 2295 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2296 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2297 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2298 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2299 hci_emit_event(event, sizeof(event), 1); 2300 } 2301 break; 2302 #endif 2303 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2304 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2305 2306 #ifdef ENABLE_CLASSIC 2307 // determine usable ACL packet types based on host buffer size and supported features 2308 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2309 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2310 #endif 2311 // Classic/LE 2312 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2313 break; 2314 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2315 manufacturer = little_endian_read_16(packet, 10); 2316 // map Cypress to Broadcom 2317 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2318 log_info("Treat Cypress as Broadcom"); 2319 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2320 little_endian_store_16(packet, 10, manufacturer); 2321 } 2322 hci_stack->manufacturer = manufacturer; 2323 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2324 break; 2325 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2326 hci_stack->local_supported_commands[0] = 2327 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2328 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2329 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2330 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2331 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2332 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2333 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2334 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2335 hci_stack->local_supported_commands[1] = 2336 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2337 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2338 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2339 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2340 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2341 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2342 break; 2343 #ifdef ENABLE_CLASSIC 2344 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2345 if (packet[5]) return; 2346 hci_stack->synchronous_flow_control_enabled = 1; 2347 break; 2348 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2349 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2350 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2351 conn = hci_connection_for_handle(handle); 2352 if (conn != NULL) { 2353 uint8_t key_size = 0; 2354 if (status == 0){ 2355 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2356 log_info("Handle %04x key Size: %u", handle, key_size); 2357 } else { 2358 key_size = 1; 2359 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2360 } 2361 hci_handle_read_encryption_key_size_complete(conn, key_size); 2362 } 2363 break; 2364 // assert pairing complete event is emitted. 2365 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2366 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2367 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2368 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2369 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2370 // lookup connection by gap pairing addr 2371 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2372 if (conn == NULL) break; 2373 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2374 break; 2375 2376 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2377 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2378 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2379 uint8_t event[67]; 2380 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2381 event[1] = 65; 2382 (void)memset(&event[2], 0, 65); 2383 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2384 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2385 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2386 event[2] = 3; 2387 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2388 } else { 2389 event[2] = 1; 2390 } 2391 } 2392 hci_emit_event(event, sizeof(event), 0); 2393 break; 2394 } 2395 2396 // note: only needed if user does not provide OOB data 2397 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2398 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2399 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2400 if (conn == NULL) break; 2401 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2402 break; 2403 #endif 2404 #endif 2405 default: 2406 break; 2407 } 2408 } 2409 2410 #ifdef ENABLE_BLE 2411 static void event_handle_le_connection_complete(const uint8_t * packet){ 2412 bd_addr_t addr; 2413 bd_addr_type_t addr_type; 2414 hci_connection_t * conn; 2415 2416 // Connection management 2417 reverse_bd_addr(&packet[8], addr); 2418 addr_type = (bd_addr_type_t)packet[7]; 2419 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2420 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2421 2422 #ifdef ENABLE_LE_CENTRAL 2423 // handle error: error is reported only to the initiator -> outgoing connection 2424 if (packet[3]){ 2425 2426 // handle cancelled outgoing connection 2427 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2428 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2429 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2430 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2431 // reset state 2432 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2433 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2434 // get outgoing connection conn struct for direct connect 2435 conn = gap_get_outgoing_connection(); 2436 } 2437 2438 // outgoing le connection establishment is done 2439 if (conn){ 2440 // remove entry 2441 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2442 btstack_memory_hci_connection_free( conn ); 2443 } 2444 return; 2445 } 2446 #endif 2447 2448 // on success, both hosts receive connection complete event 2449 if (packet[6] == HCI_ROLE_MASTER){ 2450 #ifdef ENABLE_LE_CENTRAL 2451 // if we're master on an le connection, it was an outgoing connection and we're done with it 2452 // note: no hci_connection_t object exists yet for connect with whitelist 2453 if (hci_is_le_connection_type(addr_type)){ 2454 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2455 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2456 } 2457 #endif 2458 } else { 2459 #ifdef ENABLE_LE_PERIPHERAL 2460 // if we're slave, it was an incoming connection, advertisements have stopped 2461 hci_stack->le_advertisements_active = false; 2462 #endif 2463 } 2464 2465 // LE connections are auto-accepted, so just create a connection if there isn't one already 2466 if (!conn){ 2467 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2468 } 2469 2470 // no memory, sorry. 2471 if (!conn){ 2472 return; 2473 } 2474 2475 conn->state = OPEN; 2476 conn->role = packet[6]; 2477 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2478 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2479 2480 #ifdef ENABLE_LE_PERIPHERAL 2481 if (packet[6] == HCI_ROLE_SLAVE){ 2482 hci_update_advertisements_enabled_for_current_roles(); 2483 } 2484 #endif 2485 2486 // init unenhanced att bearer mtu 2487 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2488 conn->att_connection.mtu_exchanged = false; 2489 2490 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2491 2492 // restart timer 2493 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2494 // btstack_run_loop_add_timer(&conn->timeout); 2495 2496 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2497 2498 hci_emit_nr_connections_changed(); 2499 } 2500 #endif 2501 2502 #ifdef ENABLE_CLASSIC 2503 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){ 2504 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2505 // LEVEL_4 is tested by l2cap 2506 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2507 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2508 if (level >= LEVEL_3){ 2509 // MITM not possible without keyboard or display 2510 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2511 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2512 2513 // MITM possible if one side has keyboard and the other has keyboard or display 2514 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2515 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2516 2517 // MITM not possible if one side has only display and other side has no keyboard 2518 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2519 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2520 } 2521 // LEVEL 2 requires SSP, which is a given 2522 return true; 2523 } 2524 2525 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2526 uint16_t i; 2527 for (i=0; i < size ; i++){ 2528 if (data[i] != 0) { 2529 return false; 2530 } 2531 } 2532 return true; 2533 } 2534 2535 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2536 // get requested security level 2537 gap_security_level_t requested_security_level = conn->requested_security_level; 2538 if (hci_stack->gap_secure_connections_only_mode){ 2539 requested_security_level = LEVEL_4; 2540 } 2541 2542 // assess security: LEVEL 4 requires SC 2543 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2544 if ((requested_security_level == LEVEL_4) && 2545 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2546 !hci_remote_sc_enabled(conn)){ 2547 log_info("Level 4 required, but SC not supported -> abort"); 2548 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2549 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2550 return; 2551 } 2552 2553 // assess security based on io capabilities 2554 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2555 // responder: fully validate io caps of both sides as well as OOB data 2556 bool security_possible = false; 2557 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2558 2559 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2560 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2561 // so we merge the OOB data availability 2562 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2563 if (conn->classic_oob_c_192 != NULL){ 2564 have_oob_data |= 1; 2565 } 2566 if (conn->classic_oob_c_256 != NULL){ 2567 have_oob_data |= 2; 2568 } 2569 // for up to Level 3, either P-192 as well as P-256 will do 2570 // 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 2571 // if remote does not SC, we should not receive P-256 data either 2572 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2573 security_possible = true; 2574 } 2575 // for Level 4, P-256 is needed 2576 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2577 security_possible = true; 2578 } 2579 #endif 2580 2581 if (security_possible == false){ 2582 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2583 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2584 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2585 return; 2586 } 2587 } else { 2588 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2589 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2590 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2591 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2592 log_info("Level 3+ required, but no input/output -> abort"); 2593 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2594 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2595 return; 2596 } 2597 #endif 2598 #endif 2599 } 2600 2601 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2602 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2603 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2604 } else { 2605 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2606 } 2607 #endif 2608 } 2609 2610 #endif 2611 2612 static void event_handler(uint8_t *packet, uint16_t size){ 2613 2614 uint16_t event_length = packet[1]; 2615 2616 // assert packet is complete 2617 if (size != (event_length + 2u)){ 2618 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2619 return; 2620 } 2621 2622 bd_addr_type_t addr_type; 2623 hci_con_handle_t handle; 2624 hci_connection_t * conn; 2625 int i; 2626 int create_connection_cmd; 2627 2628 #ifdef ENABLE_CLASSIC 2629 hci_link_type_t link_type; 2630 bd_addr_t addr; 2631 #endif 2632 2633 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2634 2635 switch (hci_event_packet_get_type(packet)) { 2636 2637 case HCI_EVENT_COMMAND_COMPLETE: 2638 handle_command_complete_event(packet, size); 2639 break; 2640 2641 case HCI_EVENT_COMMAND_STATUS: 2642 // get num cmd packets - limit to 1 to reduce complexity 2643 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2644 2645 // check command status to detected failed outgoing connections 2646 create_connection_cmd = 0; 2647 #ifdef ENABLE_CLASSIC 2648 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2649 create_connection_cmd = 1; 2650 } 2651 #endif 2652 #ifdef ENABLE_LE_CENTRAL 2653 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2654 create_connection_cmd = 1; 2655 } 2656 #endif 2657 if (create_connection_cmd) { 2658 uint8_t status = hci_event_command_status_get_status(packet); 2659 addr_type = hci_stack->outgoing_addr_type; 2660 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2661 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); 2662 2663 // reset outgoing address info 2664 memset(hci_stack->outgoing_addr, 0, 6); 2665 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2666 2667 // on error 2668 if (status != ERROR_CODE_SUCCESS){ 2669 #ifdef ENABLE_LE_CENTRAL 2670 if (hci_is_le_connection_type(addr_type)){ 2671 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2672 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2673 } 2674 #endif 2675 // error => outgoing connection failed 2676 if (conn != NULL){ 2677 hci_handle_connection_failed(conn, status); 2678 } 2679 } 2680 } 2681 2682 #ifdef ENABLE_CLASSIC 2683 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2684 uint8_t status = hci_event_command_status_get_status(packet); 2685 log_info("command status (inquiry), status %x", status); 2686 if (status == ERROR_CODE_SUCCESS) { 2687 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2688 } else { 2689 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2690 } 2691 } 2692 #endif 2693 break; 2694 2695 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2696 if (size < 3) return; 2697 uint16_t num_handles = packet[2]; 2698 if (size != (3u + num_handles * 4u)) return; 2699 uint16_t offset = 3; 2700 for (i=0; i<num_handles;i++){ 2701 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2702 offset += 2u; 2703 uint16_t num_packets = little_endian_read_16(packet, offset); 2704 offset += 2u; 2705 2706 conn = hci_connection_for_handle(handle); 2707 if (!conn){ 2708 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2709 continue; 2710 } 2711 2712 if (conn->num_packets_sent >= num_packets){ 2713 conn->num_packets_sent -= num_packets; 2714 } else { 2715 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2716 conn->num_packets_sent = 0; 2717 } 2718 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2719 2720 #ifdef ENABLE_CLASSIC 2721 // For SCO, we do the can_send_now_check here 2722 hci_notify_if_sco_can_send_now(); 2723 #endif 2724 } 2725 break; 2726 } 2727 2728 #ifdef ENABLE_CLASSIC 2729 case HCI_EVENT_INQUIRY_COMPLETE: 2730 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2731 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2732 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2733 hci_emit_event(event, sizeof(event), 1); 2734 } 2735 break; 2736 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2737 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2738 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2739 } 2740 break; 2741 case HCI_EVENT_CONNECTION_REQUEST: 2742 reverse_bd_addr(&packet[2], addr); 2743 link_type = (hci_link_type_t) packet[11]; 2744 2745 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2746 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2747 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2748 bd_addr_copy(hci_stack->decline_addr, addr); 2749 break; 2750 } 2751 2752 if (hci_stack->gap_classic_accept_callback != NULL){ 2753 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2754 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2755 bd_addr_copy(hci_stack->decline_addr, addr); 2756 break; 2757 } 2758 } 2759 2760 // TODO: eval COD 8-10 2761 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2762 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2763 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2764 if (!conn) { 2765 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2766 } 2767 if (!conn) { 2768 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2769 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2770 bd_addr_copy(hci_stack->decline_addr, addr); 2771 break; 2772 } 2773 conn->role = HCI_ROLE_SLAVE; 2774 conn->state = RECEIVED_CONNECTION_REQUEST; 2775 // store info about eSCO 2776 if (link_type == HCI_LINK_TYPE_ESCO){ 2777 conn->remote_supported_features[0] |= 1; 2778 } 2779 hci_run(); 2780 break; 2781 2782 case HCI_EVENT_CONNECTION_COMPLETE: 2783 // Connection management 2784 reverse_bd_addr(&packet[5], addr); 2785 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2786 addr_type = BD_ADDR_TYPE_ACL; 2787 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2788 if (conn) { 2789 if (!packet[2]){ 2790 conn->state = OPEN; 2791 conn->con_handle = little_endian_read_16(packet, 3); 2792 2793 // queue get remote feature 2794 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2795 2796 // queue set supervision timeout if we're master 2797 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2798 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2799 } 2800 2801 // restart timer 2802 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2803 btstack_run_loop_add_timer(&conn->timeout); 2804 2805 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2806 2807 hci_emit_nr_connections_changed(); 2808 } else { 2809 // connection failed 2810 hci_handle_connection_failed(conn, packet[2]); 2811 } 2812 } 2813 break; 2814 2815 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2816 reverse_bd_addr(&packet[5], addr); 2817 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2818 if (packet[2]){ 2819 // connection failed 2820 break; 2821 } 2822 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2823 if (!conn) { 2824 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2825 } 2826 if (!conn) { 2827 break; 2828 } 2829 conn->state = OPEN; 2830 conn->con_handle = little_endian_read_16(packet, 3); 2831 2832 #ifdef ENABLE_SCO_OVER_HCI 2833 // update SCO 2834 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2835 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2836 } 2837 // trigger can send now 2838 if (hci_have_usb_transport()){ 2839 hci_stack->sco_can_send_now = true; 2840 } 2841 #endif 2842 #ifdef HAVE_SCO_TRANSPORT 2843 // configure sco transport 2844 if (hci_stack->sco_transport != NULL){ 2845 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2846 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2847 } 2848 #endif 2849 break; 2850 2851 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2852 handle = little_endian_read_16(packet, 3); 2853 conn = hci_connection_for_handle(handle); 2854 if (!conn) break; 2855 if (!packet[2]){ 2856 const uint8_t * features = &packet[5]; 2857 hci_handle_remote_features_page_0(conn, features); 2858 2859 // read extended features if possible 2860 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2861 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2862 break; 2863 } 2864 } 2865 hci_handle_remote_features_received(conn); 2866 break; 2867 2868 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2869 handle = little_endian_read_16(packet, 3); 2870 conn = hci_connection_for_handle(handle); 2871 if (!conn) break; 2872 // status = ok, page = 1 2873 if (!packet[2]) { 2874 uint8_t page_number = packet[5]; 2875 uint8_t maximum_page_number = packet[6]; 2876 const uint8_t * features = &packet[7]; 2877 bool done = false; 2878 switch (page_number){ 2879 case 1: 2880 hci_handle_remote_features_page_1(conn, features); 2881 if (maximum_page_number >= 2){ 2882 // get Secure Connections (Controller) from Page 2 if available 2883 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2884 } else { 2885 // otherwise, assume SC (Controller) == SC (Host) 2886 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2887 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2888 } 2889 done = true; 2890 } 2891 break; 2892 case 2: 2893 hci_handle_remote_features_page_2(conn, features); 2894 done = true; 2895 break; 2896 default: 2897 break; 2898 } 2899 if (!done) break; 2900 } 2901 hci_handle_remote_features_received(conn); 2902 break; 2903 2904 case HCI_EVENT_LINK_KEY_REQUEST: 2905 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2906 hci_event_link_key_request_get_bd_addr(packet, addr); 2907 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2908 if (!conn) break; 2909 2910 // lookup link key in db if not cached 2911 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2912 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2913 } 2914 2915 // response sent by hci_run() 2916 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2917 #endif 2918 break; 2919 2920 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2921 hci_event_link_key_request_get_bd_addr(packet, addr); 2922 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2923 if (!conn) break; 2924 2925 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2926 2927 // CVE-2020-26555: ignore NULL link key 2928 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2929 if (btstack_is_null(&packet[8], 16)) break; 2930 2931 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2932 // Change Connection Encryption keeps link key type 2933 if (link_key_type != CHANGED_COMBINATION_KEY){ 2934 conn->link_key_type = link_key_type; 2935 } 2936 2937 // cache link key. link keys stored in little-endian format for legacy reasons 2938 memcpy(&conn->link_key, &packet[8], 16); 2939 2940 // only store link key: 2941 // - if bondable enabled 2942 if (hci_stack->bondable == false) break; 2943 // - if security level sufficient 2944 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2945 // - for SSP, also check if remote side requested bonding as well 2946 if (conn->link_key_type != COMBINATION_KEY){ 2947 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2948 if (!remote_bonding){ 2949 break; 2950 } 2951 } 2952 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2953 break; 2954 } 2955 2956 case HCI_EVENT_PIN_CODE_REQUEST: 2957 hci_event_pin_code_request_get_bd_addr(packet, addr); 2958 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2959 if (!conn) break; 2960 2961 hci_pairing_started(conn, false); 2962 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2963 if (!hci_stack->bondable ){ 2964 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2965 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2966 hci_run(); 2967 return; 2968 } 2969 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2970 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2971 log_info("Level 4 required, but SC not supported -> abort"); 2972 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2973 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2974 hci_run(); 2975 return; 2976 } 2977 break; 2978 2979 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2980 hci_event_io_capability_response_get_bd_addr(packet, addr); 2981 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2982 if (!conn) break; 2983 2984 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2985 hci_pairing_started(conn, true); 2986 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2987 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2988 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2989 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2990 #endif 2991 break; 2992 2993 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2994 hci_event_io_capability_response_get_bd_addr(packet, addr); 2995 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2996 if (!conn) break; 2997 2998 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2999 hci_connection_timestamp(conn); 3000 hci_pairing_started(conn, true); 3001 break; 3002 3003 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3004 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3005 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3006 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3007 if (!conn) break; 3008 3009 hci_connection_timestamp(conn); 3010 3011 hci_pairing_started(conn, true); 3012 3013 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3014 break; 3015 #endif 3016 3017 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3018 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3019 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3020 if (!conn) break; 3021 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3022 if (hci_stack->ssp_auto_accept){ 3023 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3024 }; 3025 } else { 3026 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3027 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3028 // don't forward event to app 3029 hci_run(); 3030 return; 3031 } 3032 break; 3033 3034 case HCI_EVENT_USER_PASSKEY_REQUEST: 3035 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3036 if (hci_stack->ssp_auto_accept){ 3037 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3038 }; 3039 break; 3040 3041 case HCI_EVENT_MODE_CHANGE: 3042 handle = hci_event_mode_change_get_handle(packet); 3043 conn = hci_connection_for_handle(handle); 3044 if (!conn) break; 3045 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3046 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3047 break; 3048 #endif 3049 3050 case HCI_EVENT_ENCRYPTION_CHANGE: 3051 handle = hci_event_encryption_change_get_connection_handle(packet); 3052 conn = hci_connection_for_handle(handle); 3053 if (!conn) break; 3054 if (hci_event_encryption_change_get_status(packet) == 0u) { 3055 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3056 if (encryption_enabled){ 3057 if (hci_is_le_connection(conn)){ 3058 // For LE, we accept connection as encrypted 3059 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3060 } 3061 #ifdef ENABLE_CLASSIC 3062 else { 3063 3064 // dedicated bonding: send result and disconnect 3065 if (conn->bonding_flags & BONDING_DEDICATED){ 3066 conn->bonding_flags &= ~BONDING_DEDICATED; 3067 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3068 conn->bonding_status = packet[2]; 3069 break; 3070 } 3071 3072 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3073 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3074 bool connected_uses_aes_ccm = encryption_enabled == 2; 3075 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3076 log_info("SC during pairing, but only E0 now -> abort"); 3077 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3078 break; 3079 } 3080 3081 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3082 if (connected_uses_aes_ccm){ 3083 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3084 } 3085 3086 #ifdef ENABLE_TESTING_SUPPORT 3087 // work around for issue with PTS dongle 3088 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3089 #endif 3090 3091 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3092 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3093 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3094 } else { 3095 // if not, pretend everything is perfect 3096 hci_handle_read_encryption_key_size_complete(conn, 16); 3097 } 3098 } 3099 #endif 3100 } else { 3101 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3102 } 3103 } 3104 3105 break; 3106 3107 #ifdef ENABLE_CLASSIC 3108 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3109 handle = hci_event_authentication_complete_get_connection_handle(packet); 3110 conn = hci_connection_for_handle(handle); 3111 if (!conn) break; 3112 3113 // clear authentication active flag 3114 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3115 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3116 3117 // authenticated only if auth status == 0 3118 if (hci_event_authentication_complete_get_status(packet) == 0){ 3119 // authenticated 3120 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3121 3122 // If not already encrypted, start encryption 3123 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3124 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3125 break; 3126 } 3127 } 3128 3129 // emit updated security level 3130 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3131 break; 3132 3133 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3134 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3135 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3136 if (!conn) break; 3137 3138 // treat successfully paired connection as authenticated 3139 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3140 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3141 } 3142 3143 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3144 break; 3145 #endif 3146 3147 // HCI_EVENT_DISCONNECTION_COMPLETE 3148 // has been split, to first notify stack before shutting connection down 3149 // see end of function, too. 3150 case HCI_EVENT_DISCONNECTION_COMPLETE: 3151 if (packet[2]) break; // status != 0 3152 handle = little_endian_read_16(packet, 3); 3153 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3154 if (hci_stack->acl_fragmentation_total_size > 0u) { 3155 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3156 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3157 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3158 hci_stack->acl_fragmentation_total_size = 0; 3159 hci_stack->acl_fragmentation_pos = 0; 3160 if (release_buffer){ 3161 hci_release_packet_buffer(); 3162 } 3163 } 3164 } 3165 3166 conn = hci_connection_for_handle(handle); 3167 if (!conn) break; 3168 #ifdef ENABLE_CLASSIC 3169 // pairing failed if it was ongoing 3170 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3171 #endif 3172 3173 // emit dedicatd bonding event 3174 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3175 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3176 } 3177 3178 // mark connection for shutdown, stop timers, reset state 3179 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3180 hci_connection_stop_timer(conn); 3181 hci_connection_init(conn); 3182 3183 #ifdef ENABLE_BLE 3184 #ifdef ENABLE_LE_PERIPHERAL 3185 // re-enable advertisements for le connections if active 3186 if (hci_is_le_connection(conn)){ 3187 hci_update_advertisements_enabled_for_current_roles(); 3188 } 3189 #endif 3190 #endif 3191 break; 3192 3193 case HCI_EVENT_HARDWARE_ERROR: 3194 log_error("Hardware Error: 0x%02x", packet[2]); 3195 if (hci_stack->hardware_error_callback){ 3196 (*hci_stack->hardware_error_callback)(packet[2]); 3197 } else { 3198 // if no special requests, just reboot stack 3199 hci_power_control_off(); 3200 hci_power_control_on(); 3201 } 3202 break; 3203 3204 #ifdef ENABLE_CLASSIC 3205 case HCI_EVENT_ROLE_CHANGE: 3206 if (packet[2]) break; // status != 0 3207 reverse_bd_addr(&packet[3], addr); 3208 addr_type = BD_ADDR_TYPE_ACL; 3209 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3210 if (!conn) break; 3211 conn->role = packet[9]; 3212 break; 3213 #endif 3214 3215 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3216 // release packet buffer only for asynchronous transport and if there are not further fragements 3217 if (hci_transport_synchronous()) { 3218 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3219 return; // instead of break: to avoid re-entering hci_run() 3220 } 3221 hci_stack->acl_fragmentation_tx_active = 0; 3222 if (hci_stack->acl_fragmentation_total_size) break; 3223 hci_release_packet_buffer(); 3224 3225 // L2CAP receives this event via the hci_emit_event below 3226 3227 #ifdef ENABLE_CLASSIC 3228 // For SCO, we do the can_send_now_check here 3229 hci_notify_if_sco_can_send_now(); 3230 #endif 3231 break; 3232 3233 #ifdef ENABLE_CLASSIC 3234 case HCI_EVENT_SCO_CAN_SEND_NOW: 3235 // For SCO, we do the can_send_now_check here 3236 hci_stack->sco_can_send_now = true; 3237 hci_notify_if_sco_can_send_now(); 3238 return; 3239 3240 // explode inquriy results for easier consumption 3241 case HCI_EVENT_INQUIRY_RESULT: 3242 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3243 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3244 gap_inquiry_explode(packet, size); 3245 break; 3246 #endif 3247 3248 #ifdef ENABLE_BLE 3249 case HCI_EVENT_LE_META: 3250 switch (packet[2]){ 3251 #ifdef ENABLE_LE_CENTRAL 3252 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3253 // log_info("advertising report received"); 3254 if (!hci_stack->le_scanning_enabled) break; 3255 le_handle_advertisement_report(packet, size); 3256 break; 3257 #endif 3258 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3259 event_handle_le_connection_complete(packet); 3260 break; 3261 3262 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3263 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3264 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3265 conn = hci_connection_for_handle(handle); 3266 if (!conn) break; 3267 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3268 break; 3269 3270 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3271 // connection 3272 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3273 conn = hci_connection_for_handle(handle); 3274 if (conn) { 3275 // read arguments 3276 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3277 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3278 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3279 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3280 3281 // validate against current connection parameter range 3282 le_connection_parameter_range_t existing_range; 3283 gap_get_connection_parameter_range(&existing_range); 3284 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3285 if (update_parameter){ 3286 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3287 conn->le_conn_interval_min = le_conn_interval_min; 3288 conn->le_conn_interval_max = le_conn_interval_max; 3289 conn->le_conn_latency = le_conn_latency; 3290 conn->le_supervision_timeout = le_supervision_timeout; 3291 } else { 3292 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3293 } 3294 } 3295 break; 3296 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3297 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3298 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3299 conn = hci_connection_for_handle(handle); 3300 if (conn) { 3301 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3302 } 3303 break; 3304 #endif 3305 default: 3306 break; 3307 } 3308 break; 3309 #endif 3310 case HCI_EVENT_VENDOR_SPECIFIC: 3311 // Vendor specific commands often create vendor specific event instead of num completed packets 3312 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3313 switch (hci_stack->manufacturer){ 3314 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3315 hci_stack->num_cmd_packets = 1; 3316 break; 3317 default: 3318 break; 3319 } 3320 break; 3321 default: 3322 break; 3323 } 3324 3325 handle_event_for_current_stack_state(packet, size); 3326 3327 // notify upper stack 3328 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3329 3330 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3331 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3332 handle = little_endian_read_16(packet, 3); 3333 hci_connection_t * aConn = hci_connection_for_handle(handle); 3334 // discard connection if app did not trigger a reconnect in the event handler 3335 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3336 hci_shutdown_connection(aConn); 3337 } 3338 } 3339 3340 // execute main loop 3341 hci_run(); 3342 } 3343 3344 #ifdef ENABLE_CLASSIC 3345 3346 #ifdef ENABLE_SCO_OVER_HCI 3347 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3348 static void sco_schedule_tx(hci_connection_t * conn); 3349 3350 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3351 log_debug("SCO TX Timeout"); 3352 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3353 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3354 if (!conn) return; 3355 3356 // trigger send 3357 conn->sco_tx_ready = 1; 3358 // extra packet if CVSD but SCO buffer is too short 3359 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3360 conn->sco_tx_ready++; 3361 } 3362 hci_notify_if_sco_can_send_now(); 3363 } 3364 3365 3366 #define SCO_TX_AFTER_RX_MS (6) 3367 3368 static void sco_schedule_tx(hci_connection_t * conn){ 3369 3370 uint32_t now = btstack_run_loop_get_time_ms(); 3371 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3372 int time_delta_ms = sco_tx_ms - now; 3373 3374 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3375 3376 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3377 btstack_run_loop_remove_timer(timer); 3378 btstack_run_loop_set_timer(timer, time_delta_ms); 3379 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3380 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3381 btstack_run_loop_add_timer(timer); 3382 } 3383 #endif 3384 3385 static void sco_handler(uint8_t * packet, uint16_t size){ 3386 // lookup connection struct 3387 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3388 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3389 if (!conn) return; 3390 3391 #ifdef ENABLE_SCO_OVER_HCI 3392 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3393 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3394 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3395 packet[2] = 0x3c; 3396 memmove(&packet[3], &packet[23], 63); 3397 size = 63; 3398 } 3399 } 3400 3401 if (hci_have_usb_transport()){ 3402 // Nothing to do 3403 } else { 3404 // 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); 3405 if (hci_stack->synchronous_flow_control_enabled == 0){ 3406 uint32_t now = btstack_run_loop_get_time_ms(); 3407 3408 if (!conn->sco_rx_valid){ 3409 // ignore first 10 packets 3410 conn->sco_rx_count++; 3411 // log_debug("sco rx count %u", conn->sco_rx_count); 3412 if (conn->sco_rx_count == 10) { 3413 // use first timestamp as is and pretent it just started 3414 conn->sco_rx_ms = now; 3415 conn->sco_rx_valid = 1; 3416 conn->sco_rx_count = 0; 3417 sco_schedule_tx(conn); 3418 } 3419 } else { 3420 // track expected arrival timme 3421 conn->sco_rx_count++; 3422 conn->sco_rx_ms += 7; 3423 int delta = (int32_t) (now - conn->sco_rx_ms); 3424 if (delta > 0){ 3425 conn->sco_rx_ms++; 3426 } 3427 // log_debug("sco rx %u", conn->sco_rx_ms); 3428 sco_schedule_tx(conn); 3429 } 3430 } 3431 } 3432 #endif 3433 3434 // deliver to app 3435 if (hci_stack->sco_packet_handler) { 3436 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3437 } 3438 3439 #ifdef HAVE_SCO_TRANSPORT 3440 // We can send one packet for each received packet 3441 conn->sco_tx_ready++; 3442 hci_notify_if_sco_can_send_now(); 3443 #endif 3444 3445 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3446 conn->num_packets_completed++; 3447 hci_stack->host_completed_packets = 1; 3448 hci_run(); 3449 #endif 3450 } 3451 #endif 3452 3453 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3454 hci_dump_packet(packet_type, 1, packet, size); 3455 switch (packet_type) { 3456 case HCI_EVENT_PACKET: 3457 event_handler(packet, size); 3458 break; 3459 case HCI_ACL_DATA_PACKET: 3460 acl_handler(packet, size); 3461 break; 3462 #ifdef ENABLE_CLASSIC 3463 case HCI_SCO_DATA_PACKET: 3464 sco_handler(packet, size); 3465 break; 3466 #endif 3467 default: 3468 break; 3469 } 3470 } 3471 3472 /** 3473 * @brief Add event packet handler. 3474 */ 3475 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3476 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3477 } 3478 3479 3480 /** Register HCI packet handlers */ 3481 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3482 hci_stack->acl_packet_handler = handler; 3483 } 3484 3485 #ifdef ENABLE_CLASSIC 3486 /** 3487 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3488 */ 3489 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3490 hci_stack->sco_packet_handler = handler; 3491 } 3492 #endif 3493 3494 static void hci_state_reset(void){ 3495 // no connections yet 3496 hci_stack->connections = NULL; 3497 3498 // keep discoverable/connectable as this has been requested by the client(s) 3499 // hci_stack->discoverable = 0; 3500 // hci_stack->connectable = 0; 3501 // hci_stack->bondable = 1; 3502 // hci_stack->own_addr_type = 0; 3503 3504 // buffer is free 3505 hci_stack->hci_packet_buffer_reserved = false; 3506 3507 // no pending cmds 3508 hci_stack->decline_reason = 0; 3509 3510 hci_stack->secure_connections_active = false; 3511 3512 #ifdef ENABLE_CLASSIC 3513 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3514 hci_stack->gap_tasks = 3515 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3516 GAP_TASK_SET_CLASS_OF_DEVICE | 3517 GAP_TASK_SET_LOCAL_NAME | 3518 GAP_TASK_SET_EIR_DATA | 3519 GAP_TASK_WRITE_SCAN_ENABLE; 3520 #endif 3521 3522 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3523 hci_stack->classic_read_local_oob_data = true; 3524 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3525 #endif 3526 3527 // LE 3528 #ifdef ENABLE_BLE 3529 memset(hci_stack->le_random_address, 0, 6); 3530 hci_stack->le_random_address_set = 0; 3531 #endif 3532 #ifdef ENABLE_LE_CENTRAL 3533 hci_stack->le_scanning_active = false; 3534 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3535 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3536 hci_stack->le_whitelist_capacity = 0; 3537 #endif 3538 #ifdef ENABLE_LE_PERIPHERAL 3539 hci_stack->le_advertisements_active = false; 3540 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3541 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3542 } 3543 if (hci_stack->le_advertisements_data != NULL){ 3544 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3545 } 3546 #endif 3547 } 3548 3549 #ifdef ENABLE_CLASSIC 3550 /** 3551 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3552 */ 3553 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3554 // store and open remote device db 3555 hci_stack->link_key_db = link_key_db; 3556 if (hci_stack->link_key_db) { 3557 hci_stack->link_key_db->open(); 3558 } 3559 } 3560 #endif 3561 3562 void hci_init(const hci_transport_t *transport, const void *config){ 3563 3564 #ifdef HAVE_MALLOC 3565 if (!hci_stack) { 3566 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3567 } 3568 #else 3569 hci_stack = &hci_stack_static; 3570 #endif 3571 memset(hci_stack, 0, sizeof(hci_stack_t)); 3572 3573 // reference to use transport layer implementation 3574 hci_stack->hci_transport = transport; 3575 3576 // reference to used config 3577 hci_stack->config = config; 3578 3579 // setup pointer for outgoing packet buffer 3580 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3581 3582 // max acl payload size defined in config.h 3583 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3584 3585 // register packet handlers with transport 3586 transport->register_packet_handler(&packet_handler); 3587 3588 hci_stack->state = HCI_STATE_OFF; 3589 3590 // class of device 3591 hci_stack->class_of_device = 0x007a020c; // Smartphone 3592 3593 // bondable by default 3594 hci_stack->bondable = 1; 3595 3596 #ifdef ENABLE_CLASSIC 3597 // classic name 3598 hci_stack->local_name = default_classic_name; 3599 3600 // Master slave policy 3601 hci_stack->master_slave_policy = 1; 3602 3603 // Allow Role Switch 3604 hci_stack->allow_role_switch = 1; 3605 3606 // Default / minimum security level = 2 3607 hci_stack->gap_security_level = LEVEL_2; 3608 3609 // Default Security Mode 4 3610 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3611 3612 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3613 hci_stack->gap_required_encyrption_key_size = 7; 3614 3615 // Link Supervision Timeout 3616 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3617 3618 #endif 3619 3620 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3621 hci_stack->ssp_enable = 1; 3622 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3623 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3624 hci_stack->ssp_auto_accept = 1; 3625 3626 // Secure Connections: enable (requires support from Controller) 3627 hci_stack->secure_connections_enable = true; 3628 3629 // voice setting - signed 16 bit pcm data with CVSD over the air 3630 hci_stack->sco_voice_setting = 0x60; 3631 3632 #ifdef ENABLE_LE_CENTRAL 3633 // connection parameter to use for outgoing connections 3634 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3635 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3636 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3637 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3638 hci_stack->le_connection_latency = 4; // 4 3639 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3640 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3641 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3642 3643 // default LE Scanning 3644 hci_stack->le_scan_type = 0x1; // active 3645 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3646 hci_stack->le_scan_window = 0x30; // 30 ms 3647 #endif 3648 3649 #ifdef ENABLE_LE_PERIPHERAL 3650 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3651 #endif 3652 3653 // connection parameter range used to answer connection parameter update requests in l2cap 3654 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3655 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3656 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3657 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3658 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3659 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3660 3661 hci_state_reset(); 3662 } 3663 3664 void hci_deinit(void){ 3665 #ifdef HAVE_MALLOC 3666 if (hci_stack) { 3667 free(hci_stack); 3668 } 3669 #endif 3670 hci_stack = NULL; 3671 3672 #ifdef ENABLE_CLASSIC 3673 disable_l2cap_timeouts = 0; 3674 #endif 3675 } 3676 3677 /** 3678 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3679 */ 3680 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3681 hci_stack->chipset = chipset_driver; 3682 3683 // reset chipset driver - init is also called on power_up 3684 if (hci_stack->chipset && hci_stack->chipset->init){ 3685 hci_stack->chipset->init(hci_stack->config); 3686 } 3687 } 3688 3689 /** 3690 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3691 */ 3692 void hci_set_control(const btstack_control_t *hardware_control){ 3693 // references to used control implementation 3694 hci_stack->control = hardware_control; 3695 // init with transport config 3696 hardware_control->init(hci_stack->config); 3697 } 3698 3699 void hci_close(void){ 3700 3701 #ifdef ENABLE_CLASSIC 3702 // close remote device db 3703 if (hci_stack->link_key_db) { 3704 hci_stack->link_key_db->close(); 3705 } 3706 #endif 3707 3708 btstack_linked_list_iterator_t lit; 3709 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3710 while (btstack_linked_list_iterator_has_next(&lit)){ 3711 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3712 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3713 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3714 hci_shutdown_connection(connection); 3715 } 3716 3717 hci_power_control(HCI_POWER_OFF); 3718 3719 #ifdef HAVE_MALLOC 3720 free(hci_stack); 3721 #endif 3722 hci_stack = NULL; 3723 } 3724 3725 #ifdef HAVE_SCO_TRANSPORT 3726 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3727 hci_stack->sco_transport = sco_transport; 3728 sco_transport->register_packet_handler(&packet_handler); 3729 } 3730 #endif 3731 3732 #ifdef ENABLE_CLASSIC 3733 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3734 // validate ranage and set 3735 if (encryption_key_size < 7) return; 3736 if (encryption_key_size > 16) return; 3737 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3738 } 3739 3740 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3741 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3742 hci_stack->gap_security_mode = security_mode; 3743 return ERROR_CODE_SUCCESS; 3744 } else { 3745 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3746 } 3747 } 3748 3749 gap_security_mode_t gap_get_security_mode(void){ 3750 return hci_stack->gap_security_mode; 3751 } 3752 3753 void gap_set_security_level(gap_security_level_t security_level){ 3754 hci_stack->gap_security_level = security_level; 3755 } 3756 3757 gap_security_level_t gap_get_security_level(void){ 3758 if (hci_stack->gap_secure_connections_only_mode){ 3759 return LEVEL_4; 3760 } 3761 return hci_stack->gap_security_level; 3762 } 3763 3764 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3765 hci_stack->gap_minimal_service_security_level = security_level; 3766 } 3767 3768 void gap_set_secure_connections_only_mode(bool enable){ 3769 hci_stack->gap_secure_connections_only_mode = enable; 3770 } 3771 3772 bool gap_get_secure_connections_only_mode(void){ 3773 return hci_stack->gap_secure_connections_only_mode; 3774 } 3775 #endif 3776 3777 #ifdef ENABLE_CLASSIC 3778 void gap_set_class_of_device(uint32_t class_of_device){ 3779 hci_stack->class_of_device = class_of_device; 3780 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3781 hci_run(); 3782 } 3783 3784 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3785 hci_stack->default_link_policy_settings = default_link_policy_settings; 3786 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3787 hci_run(); 3788 } 3789 3790 void gap_set_allow_role_switch(bool allow_role_switch){ 3791 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3792 } 3793 3794 uint8_t hci_get_allow_role_switch(void){ 3795 return hci_stack->allow_role_switch; 3796 } 3797 3798 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3799 hci_stack->link_supervision_timeout = link_supervision_timeout; 3800 } 3801 3802 void hci_disable_l2cap_timeout_check(void){ 3803 disable_l2cap_timeouts = 1; 3804 } 3805 #endif 3806 3807 #ifndef HAVE_HOST_CONTROLLER_API 3808 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3809 void hci_set_bd_addr(bd_addr_t addr){ 3810 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3811 hci_stack->custom_bd_addr_set = 1; 3812 } 3813 #endif 3814 3815 // State-Module-Driver overview 3816 // state module low-level 3817 // HCI_STATE_OFF off close 3818 // HCI_STATE_INITIALIZING, on open 3819 // HCI_STATE_WORKING, on open 3820 // HCI_STATE_HALTING, on open 3821 // HCI_STATE_SLEEPING, off/sleep close 3822 // HCI_STATE_FALLING_ASLEEP on open 3823 3824 static int hci_power_control_on(void){ 3825 3826 // power on 3827 int err = 0; 3828 if (hci_stack->control && hci_stack->control->on){ 3829 err = (*hci_stack->control->on)(); 3830 } 3831 if (err){ 3832 log_error( "POWER_ON failed"); 3833 hci_emit_hci_open_failed(); 3834 return err; 3835 } 3836 3837 // int chipset driver 3838 if (hci_stack->chipset && hci_stack->chipset->init){ 3839 hci_stack->chipset->init(hci_stack->config); 3840 } 3841 3842 // init transport 3843 if (hci_stack->hci_transport->init){ 3844 hci_stack->hci_transport->init(hci_stack->config); 3845 } 3846 3847 // open transport 3848 err = hci_stack->hci_transport->open(); 3849 if (err){ 3850 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3851 if (hci_stack->control && hci_stack->control->off){ 3852 (*hci_stack->control->off)(); 3853 } 3854 hci_emit_hci_open_failed(); 3855 return err; 3856 } 3857 return 0; 3858 } 3859 3860 static void hci_power_control_off(void){ 3861 3862 log_info("hci_power_control_off"); 3863 3864 // close low-level device 3865 hci_stack->hci_transport->close(); 3866 3867 log_info("hci_power_control_off - hci_transport closed"); 3868 3869 // power off 3870 if (hci_stack->control && hci_stack->control->off){ 3871 (*hci_stack->control->off)(); 3872 } 3873 3874 log_info("hci_power_control_off - control closed"); 3875 3876 hci_stack->state = HCI_STATE_OFF; 3877 } 3878 3879 static void hci_power_control_sleep(void){ 3880 3881 log_info("hci_power_control_sleep"); 3882 3883 #if 0 3884 // don't close serial port during sleep 3885 3886 // close low-level device 3887 hci_stack->hci_transport->close(hci_stack->config); 3888 #endif 3889 3890 // sleep mode 3891 if (hci_stack->control && hci_stack->control->sleep){ 3892 (*hci_stack->control->sleep)(); 3893 } 3894 3895 hci_stack->state = HCI_STATE_SLEEPING; 3896 } 3897 3898 static int hci_power_control_wake(void){ 3899 3900 log_info("hci_power_control_wake"); 3901 3902 // wake on 3903 if (hci_stack->control && hci_stack->control->wake){ 3904 (*hci_stack->control->wake)(); 3905 } 3906 3907 #if 0 3908 // open low-level device 3909 int err = hci_stack->hci_transport->open(hci_stack->config); 3910 if (err){ 3911 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3912 if (hci_stack->control && hci_stack->control->off){ 3913 (*hci_stack->control->off)(); 3914 } 3915 hci_emit_hci_open_failed(); 3916 return err; 3917 } 3918 #endif 3919 3920 return 0; 3921 } 3922 3923 static void hci_power_transition_to_initializing(void){ 3924 // set up state machine 3925 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3926 hci_stack->hci_packet_buffer_reserved = false; 3927 hci_stack->state = HCI_STATE_INITIALIZING; 3928 hci_stack->substate = HCI_INIT_SEND_RESET; 3929 } 3930 3931 // returns error 3932 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3933 int err; 3934 switch (power_mode){ 3935 case HCI_POWER_ON: 3936 err = hci_power_control_on(); 3937 if (err != 0) { 3938 log_error("hci_power_control_on() error %d", err); 3939 return err; 3940 } 3941 hci_power_transition_to_initializing(); 3942 break; 3943 case HCI_POWER_OFF: 3944 // do nothing 3945 break; 3946 case HCI_POWER_SLEEP: 3947 // do nothing (with SLEEP == OFF) 3948 break; 3949 default: 3950 btstack_assert(false); 3951 break; 3952 } 3953 return ERROR_CODE_SUCCESS; 3954 } 3955 3956 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3957 switch (power_mode){ 3958 case HCI_POWER_ON: 3959 // do nothing 3960 break; 3961 case HCI_POWER_OFF: 3962 // no connections yet, just turn it off 3963 hci_power_control_off(); 3964 break; 3965 case HCI_POWER_SLEEP: 3966 // no connections yet, just turn it off 3967 hci_power_control_sleep(); 3968 break; 3969 default: 3970 btstack_assert(false); 3971 break; 3972 } 3973 return ERROR_CODE_SUCCESS; 3974 } 3975 3976 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3977 switch (power_mode){ 3978 case HCI_POWER_ON: 3979 // do nothing 3980 break; 3981 case HCI_POWER_OFF: 3982 // see hci_run 3983 hci_stack->state = HCI_STATE_HALTING; 3984 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3985 break; 3986 case HCI_POWER_SLEEP: 3987 // see hci_run 3988 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3989 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3990 break; 3991 default: 3992 btstack_assert(false); 3993 break; 3994 } 3995 return ERROR_CODE_SUCCESS; 3996 } 3997 3998 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3999 switch (power_mode){ 4000 case HCI_POWER_ON: 4001 hci_power_transition_to_initializing(); 4002 break; 4003 case HCI_POWER_OFF: 4004 // do nothing 4005 break; 4006 case HCI_POWER_SLEEP: 4007 // see hci_run 4008 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4009 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4010 break; 4011 default: 4012 btstack_assert(false); 4013 break; 4014 } 4015 return ERROR_CODE_SUCCESS; 4016 } 4017 4018 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4019 switch (power_mode){ 4020 case HCI_POWER_ON: 4021 hci_power_transition_to_initializing(); 4022 break; 4023 case HCI_POWER_OFF: 4024 // see hci_run 4025 hci_stack->state = HCI_STATE_HALTING; 4026 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4027 break; 4028 case HCI_POWER_SLEEP: 4029 // do nothing 4030 break; 4031 default: 4032 btstack_assert(false); 4033 break; 4034 } 4035 return ERROR_CODE_SUCCESS; 4036 } 4037 4038 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4039 int err; 4040 switch (power_mode){ 4041 case HCI_POWER_ON: 4042 err = hci_power_control_wake(); 4043 if (err) return err; 4044 hci_power_transition_to_initializing(); 4045 break; 4046 case HCI_POWER_OFF: 4047 hci_stack->state = HCI_STATE_HALTING; 4048 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4049 break; 4050 case HCI_POWER_SLEEP: 4051 // do nothing 4052 break; 4053 default: 4054 btstack_assert(false); 4055 break; 4056 } 4057 return ERROR_CODE_SUCCESS; 4058 } 4059 4060 int hci_power_control(HCI_POWER_MODE power_mode){ 4061 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4062 int err = 0; 4063 switch (hci_stack->state){ 4064 case HCI_STATE_OFF: 4065 err = hci_power_control_state_off(power_mode); 4066 break; 4067 case HCI_STATE_INITIALIZING: 4068 err = hci_power_control_state_initializing(power_mode); 4069 break; 4070 case HCI_STATE_WORKING: 4071 err = hci_power_control_state_working(power_mode); 4072 break; 4073 case HCI_STATE_HALTING: 4074 err = hci_power_control_state_halting(power_mode); 4075 break; 4076 case HCI_STATE_FALLING_ASLEEP: 4077 err = hci_power_control_state_falling_asleep(power_mode); 4078 break; 4079 case HCI_STATE_SLEEPING: 4080 err = hci_power_control_state_sleeping(power_mode); 4081 break; 4082 default: 4083 btstack_assert(false); 4084 break; 4085 } 4086 if (err != 0){ 4087 return err; 4088 } 4089 4090 // create internal event 4091 hci_emit_state(); 4092 4093 // trigger next/first action 4094 hci_run(); 4095 4096 return 0; 4097 } 4098 4099 4100 #ifdef ENABLE_CLASSIC 4101 4102 static void hci_update_scan_enable(void){ 4103 // 2 = page scan, 1 = inq scan 4104 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4105 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4106 hci_run(); 4107 } 4108 4109 void gap_discoverable_control(uint8_t enable){ 4110 if (enable) enable = 1; // normalize argument 4111 4112 if (hci_stack->discoverable == enable){ 4113 hci_emit_discoverable_enabled(hci_stack->discoverable); 4114 return; 4115 } 4116 4117 hci_stack->discoverable = enable; 4118 hci_update_scan_enable(); 4119 } 4120 4121 void gap_connectable_control(uint8_t enable){ 4122 if (enable) enable = 1; // normalize argument 4123 4124 // don't emit event 4125 if (hci_stack->connectable == enable) return; 4126 4127 hci_stack->connectable = enable; 4128 hci_update_scan_enable(); 4129 } 4130 #endif 4131 4132 void gap_local_bd_addr(bd_addr_t address_buffer){ 4133 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4134 } 4135 4136 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4137 static void hci_host_num_completed_packets(void){ 4138 4139 // create packet manually as arrays are not supported and num_commands should not get reduced 4140 hci_reserve_packet_buffer(); 4141 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4142 4143 uint16_t size = 0; 4144 uint16_t num_handles = 0; 4145 packet[size++] = 0x35; 4146 packet[size++] = 0x0c; 4147 size++; // skip param len 4148 size++; // skip num handles 4149 4150 // add { handle, packets } entries 4151 btstack_linked_item_t * it; 4152 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4153 hci_connection_t * connection = (hci_connection_t *) it; 4154 if (connection->num_packets_completed){ 4155 little_endian_store_16(packet, size, connection->con_handle); 4156 size += 2; 4157 little_endian_store_16(packet, size, connection->num_packets_completed); 4158 size += 2; 4159 // 4160 num_handles++; 4161 connection->num_packets_completed = 0; 4162 } 4163 } 4164 4165 packet[2] = size - 3; 4166 packet[3] = num_handles; 4167 4168 hci_stack->host_completed_packets = 0; 4169 4170 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4171 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4172 4173 // release packet buffer for synchronous transport implementations 4174 if (hci_transport_synchronous()){ 4175 hci_release_packet_buffer(); 4176 hci_emit_transport_packet_sent(); 4177 } 4178 } 4179 #endif 4180 4181 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4182 UNUSED(ds); 4183 hci_stack->substate = HCI_HALTING_CLOSE; 4184 // allow packet handlers to defer final shutdown 4185 hci_emit_state(); 4186 hci_run(); 4187 } 4188 4189 static bool hci_run_acl_fragments(void){ 4190 if (hci_stack->acl_fragmentation_total_size > 0u) { 4191 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4192 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4193 if (connection) { 4194 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4195 hci_send_acl_packet_fragments(connection); 4196 return true; 4197 } 4198 } else { 4199 // connection gone -> discard further fragments 4200 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4201 hci_stack->acl_fragmentation_total_size = 0; 4202 hci_stack->acl_fragmentation_pos = 0; 4203 } 4204 } 4205 return false; 4206 } 4207 4208 #ifdef ENABLE_CLASSIC 4209 static bool hci_run_general_gap_classic(void){ 4210 4211 // assert stack is working and classic is active 4212 if (hci_classic_supported() == false) return false; 4213 if (hci_stack->state != HCI_STATE_WORKING) return false; 4214 4215 // decline incoming connections 4216 if (hci_stack->decline_reason){ 4217 uint8_t reason = hci_stack->decline_reason; 4218 hci_stack->decline_reason = 0; 4219 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4220 return true; 4221 } 4222 4223 if (hci_stack->gap_tasks != 0){ 4224 hci_run_gap_tasks_classic(); 4225 return true; 4226 } 4227 4228 // start/stop inquiry 4229 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4230 uint8_t duration = hci_stack->inquiry_state; 4231 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4232 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4233 return true; 4234 } 4235 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4236 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4237 hci_send_cmd(&hci_inquiry_cancel); 4238 return true; 4239 } 4240 // remote name request 4241 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4242 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4243 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4244 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4245 return true; 4246 } 4247 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4248 // Local OOB data 4249 if (hci_stack->classic_read_local_oob_data){ 4250 hci_stack->classic_read_local_oob_data = false; 4251 if (hci_stack->local_supported_commands[1] & 0x10u){ 4252 hci_send_cmd(&hci_read_local_extended_oob_data); 4253 } else { 4254 hci_send_cmd(&hci_read_local_oob_data); 4255 } 4256 } 4257 #endif 4258 // pairing 4259 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4260 uint8_t state = hci_stack->gap_pairing_state; 4261 uint8_t pin_code[16]; 4262 switch (state){ 4263 case GAP_PAIRING_STATE_SEND_PIN: 4264 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4265 memset(pin_code, 0, 16); 4266 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4267 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4268 break; 4269 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4270 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4271 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4272 break; 4273 case GAP_PAIRING_STATE_SEND_PASSKEY: 4274 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4275 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4276 break; 4277 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4278 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4279 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4280 break; 4281 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4282 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4283 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4284 break; 4285 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4286 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4287 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4288 break; 4289 default: 4290 break; 4291 } 4292 return true; 4293 } 4294 return false; 4295 } 4296 #endif 4297 4298 #ifdef ENABLE_BLE 4299 static bool hci_run_general_gap_le(void){ 4300 4301 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4302 4303 if (hci_stack->state != HCI_STATE_WORKING) return false; 4304 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4305 4306 4307 // Phase 1: collect what to stop 4308 4309 bool scanning_stop = false; 4310 bool connecting_stop = false; 4311 bool advertising_stop = false; 4312 4313 #ifndef ENABLE_LE_CENTRAL 4314 UNUSED(scanning_stop); 4315 UNUSED(connecting_stop); 4316 #endif 4317 #ifndef ENABLE_LE_PERIPHERAL 4318 UNUSED(advertising_stop); 4319 #endif 4320 4321 // check if whitelist needs modification 4322 bool whitelist_modification_pending = false; 4323 btstack_linked_list_iterator_t lit; 4324 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4325 while (btstack_linked_list_iterator_has_next(&lit)){ 4326 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4327 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4328 whitelist_modification_pending = true; 4329 break; 4330 } 4331 } 4332 // check if resolving list needs modification 4333 bool resolving_list_modification_pending = false; 4334 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4335 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4336 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4337 resolving_list_modification_pending = true; 4338 } 4339 #endif 4340 4341 #ifdef ENABLE_LE_CENTRAL 4342 // scanning control 4343 if (hci_stack->le_scanning_active) { 4344 // stop if: 4345 // - parameter change required 4346 // - it's disabled 4347 // - whitelist change required but used for scanning 4348 // - resolving list modified 4349 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4350 if ((hci_stack->le_scanning_param_update) || 4351 !hci_stack->le_scanning_enabled || 4352 scanning_uses_whitelist || 4353 resolving_list_modification_pending){ 4354 4355 scanning_stop = true; 4356 } 4357 } 4358 #endif 4359 4360 #ifdef ENABLE_LE_CENTRAL 4361 // connecting control 4362 bool connecting_with_whitelist; 4363 switch (hci_stack->le_connecting_state){ 4364 case LE_CONNECTING_DIRECT: 4365 case LE_CONNECTING_WHITELIST: 4366 // stop connecting if: 4367 // - connecting uses white and whitelist modification pending 4368 // - if it got disabled 4369 // - resolving list modified 4370 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4371 if ((connecting_with_whitelist && whitelist_modification_pending) || 4372 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4373 resolving_list_modification_pending) { 4374 4375 connecting_stop = true; 4376 } 4377 break; 4378 default: 4379 break; 4380 } 4381 #endif 4382 4383 #ifdef ENABLE_LE_PERIPHERAL 4384 // le advertisement control 4385 if (hci_stack->le_advertisements_active){ 4386 // stop if: 4387 // - parameter change required 4388 // - it's disabled 4389 // - whitelist change required but used for advertisement filter policy 4390 // - resolving list modified 4391 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4392 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4393 if (advertising_change || 4394 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4395 (advertising_uses_whitelist & whitelist_modification_pending) || 4396 resolving_list_modification_pending) { 4397 4398 advertising_stop = true; 4399 } 4400 } 4401 #endif 4402 4403 4404 // Phase 2: stop everything that should be off during modifications 4405 4406 #ifdef ENABLE_LE_CENTRAL 4407 if (scanning_stop){ 4408 hci_stack->le_scanning_active = false; 4409 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4410 return true; 4411 } 4412 #endif 4413 4414 #ifdef ENABLE_LE_CENTRAL 4415 if (connecting_stop){ 4416 hci_send_cmd(&hci_le_create_connection_cancel); 4417 return true; 4418 } 4419 #endif 4420 4421 #ifdef ENABLE_LE_PERIPHERAL 4422 if (advertising_stop){ 4423 hci_stack->le_advertisements_active = false; 4424 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4425 return true; 4426 } 4427 #endif 4428 4429 // Phase 3: modify 4430 4431 #ifdef ENABLE_LE_CENTRAL 4432 if (hci_stack->le_scanning_param_update){ 4433 hci_stack->le_scanning_param_update = false; 4434 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4435 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4436 return true; 4437 } 4438 #endif 4439 4440 #ifdef ENABLE_LE_PERIPHERAL 4441 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4442 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4443 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4444 hci_send_cmd(&hci_le_set_advertising_parameters, 4445 hci_stack->le_advertisements_interval_min, 4446 hci_stack->le_advertisements_interval_max, 4447 hci_stack->le_advertisements_type, 4448 hci_stack->le_advertisements_own_addr_type, 4449 hci_stack->le_advertisements_direct_address_type, 4450 hci_stack->le_advertisements_direct_address, 4451 hci_stack->le_advertisements_channel_map, 4452 hci_stack->le_advertisements_filter_policy); 4453 return true; 4454 } 4455 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4456 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4457 uint8_t adv_data_clean[31]; 4458 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4459 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4460 hci_stack->le_advertisements_data_len); 4461 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4462 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4463 return true; 4464 } 4465 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4466 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4467 uint8_t scan_data_clean[31]; 4468 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4469 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4470 hci_stack->le_scan_response_data_len); 4471 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4472 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4473 return true; 4474 } 4475 #endif 4476 4477 4478 #ifdef ENABLE_LE_CENTRAL 4479 // if connect with whitelist was active and is not cancelled yet, wait until next time 4480 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4481 #endif 4482 4483 // LE Whitelist Management 4484 if (whitelist_modification_pending){ 4485 // add/remove entries 4486 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4487 while (btstack_linked_list_iterator_has_next(&lit)){ 4488 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4489 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4490 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4491 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4492 return true; 4493 } 4494 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4495 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4496 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4497 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4498 return true; 4499 } 4500 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4501 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4502 btstack_memory_whitelist_entry_free(entry); 4503 } 4504 } 4505 } 4506 4507 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4508 // LE Resolving List Management 4509 if (resolving_list_supported) { 4510 uint16_t i; 4511 switch (hci_stack->le_resolving_list_state) { 4512 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4513 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4514 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4515 return true; 4516 case LE_RESOLVING_LIST_READ_SIZE: 4517 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4518 hci_send_cmd(&hci_le_read_resolving_list_size); 4519 return true; 4520 case LE_RESOLVING_LIST_SEND_CLEAR: 4521 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4522 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4523 sizeof(hci_stack->le_resolving_list_add_entries)); 4524 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4525 sizeof(hci_stack->le_resolving_list_remove_entries)); 4526 hci_send_cmd(&hci_le_clear_resolving_list); 4527 return true; 4528 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4529 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4530 uint8_t offset = i >> 3; 4531 uint8_t mask = 1 << (i & 7); 4532 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4533 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4534 bd_addr_t peer_identity_addreses; 4535 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4536 sm_key_t peer_irk; 4537 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4538 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4539 4540 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4541 // trigger whitelist entry 'update' (work around for controller bug) 4542 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4543 while (btstack_linked_list_iterator_has_next(&lit)) { 4544 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4545 if (entry->address_type != peer_identity_addr_type) continue; 4546 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4547 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4548 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4549 } 4550 #endif 4551 4552 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4553 peer_identity_addreses); 4554 return true; 4555 } 4556 4557 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4558 4559 /* fall through */ 4560 4561 case LE_RESOLVING_LIST_ADD_ENTRIES: 4562 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4563 uint8_t offset = i >> 3; 4564 uint8_t mask = 1 << (i & 7); 4565 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4566 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4567 bd_addr_t peer_identity_addreses; 4568 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4569 sm_key_t peer_irk; 4570 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4571 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4572 const uint8_t *local_irk = gap_get_persistent_irk(); 4573 // command uses format specifier 'P' that stores 16-byte value without flip 4574 uint8_t local_irk_flipped[16]; 4575 uint8_t peer_irk_flipped[16]; 4576 reverse_128(local_irk, local_irk_flipped); 4577 reverse_128(peer_irk, peer_irk_flipped); 4578 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4579 peer_irk_flipped, local_irk_flipped); 4580 return true; 4581 } 4582 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4583 break; 4584 4585 default: 4586 break; 4587 } 4588 } 4589 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4590 #endif 4591 4592 // Phase 4: restore state 4593 4594 #ifdef ENABLE_LE_CENTRAL 4595 // re-start scanning 4596 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4597 hci_stack->le_scanning_active = true; 4598 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4599 return true; 4600 } 4601 #endif 4602 4603 #ifdef ENABLE_LE_CENTRAL 4604 // re-start connecting 4605 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4606 bd_addr_t null_addr; 4607 memset(null_addr, 0, 6); 4608 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4609 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4610 hci_send_cmd(&hci_le_create_connection, 4611 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4612 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4613 1, // use whitelist 4614 0, // peer address type 4615 null_addr, // peer bd addr 4616 hci_stack->le_connection_own_addr_type, // our addr type: 4617 hci_stack->le_connection_interval_min, // conn interval min 4618 hci_stack->le_connection_interval_max, // conn interval max 4619 hci_stack->le_connection_latency, // conn latency 4620 hci_stack->le_supervision_timeout, // conn latency 4621 hci_stack->le_minimum_ce_length, // min ce length 4622 hci_stack->le_maximum_ce_length // max ce length 4623 ); 4624 return true; 4625 } 4626 #endif 4627 4628 #ifdef ENABLE_LE_PERIPHERAL 4629 // re-start advertising 4630 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4631 // check if advertisements should be enabled given 4632 hci_stack->le_advertisements_active = true; 4633 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4634 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4635 return true; 4636 } 4637 #endif 4638 4639 return false; 4640 } 4641 #endif 4642 4643 static bool hci_run_general_pending_commands(void){ 4644 btstack_linked_item_t * it; 4645 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4646 hci_connection_t * connection = (hci_connection_t *) it; 4647 4648 switch(connection->state){ 4649 case SEND_CREATE_CONNECTION: 4650 switch(connection->address_type){ 4651 #ifdef ENABLE_CLASSIC 4652 case BD_ADDR_TYPE_ACL: 4653 log_info("sending hci_create_connection"); 4654 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4655 break; 4656 #endif 4657 default: 4658 #ifdef ENABLE_BLE 4659 #ifdef ENABLE_LE_CENTRAL 4660 log_info("sending hci_le_create_connection"); 4661 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4662 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4663 hci_send_cmd(&hci_le_create_connection, 4664 hci_stack->le_connection_scan_interval, // conn scan interval 4665 hci_stack->le_connection_scan_window, // conn scan windows 4666 0, // don't use whitelist 4667 connection->address_type, // peer address type 4668 connection->address, // peer bd addr 4669 hci_stack->le_connection_own_addr_type, // our addr type: 4670 hci_stack->le_connection_interval_min, // conn interval min 4671 hci_stack->le_connection_interval_max, // conn interval max 4672 hci_stack->le_connection_latency, // conn latency 4673 hci_stack->le_supervision_timeout, // conn latency 4674 hci_stack->le_minimum_ce_length, // min ce length 4675 hci_stack->le_maximum_ce_length // max ce length 4676 ); 4677 connection->state = SENT_CREATE_CONNECTION; 4678 #endif 4679 #endif 4680 break; 4681 } 4682 return true; 4683 4684 #ifdef ENABLE_CLASSIC 4685 case RECEIVED_CONNECTION_REQUEST: 4686 connection->role = HCI_ROLE_SLAVE; 4687 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4688 log_info("sending hci_accept_connection_request"); 4689 connection->state = ACCEPTED_CONNECTION_REQUEST; 4690 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4691 } 4692 return true; 4693 #endif 4694 4695 #ifdef ENABLE_BLE 4696 #ifdef ENABLE_LE_CENTRAL 4697 case SEND_CANCEL_CONNECTION: 4698 connection->state = SENT_CANCEL_CONNECTION; 4699 hci_send_cmd(&hci_le_create_connection_cancel); 4700 return true; 4701 #endif 4702 #endif 4703 case SEND_DISCONNECT: 4704 connection->state = SENT_DISCONNECT; 4705 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4706 return true; 4707 4708 default: 4709 break; 4710 } 4711 4712 // no further commands if connection is about to get shut down 4713 if (connection->state == SENT_DISCONNECT) continue; 4714 4715 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4716 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4717 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4718 return true; 4719 } 4720 4721 #ifdef ENABLE_CLASSIC 4722 4723 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4724 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4725 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4726 return true; 4727 } 4728 4729 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4730 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4731 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4732 return true; 4733 } 4734 4735 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4736 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4737 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4738 return true; 4739 } 4740 4741 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4742 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4743 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4744 return true; 4745 } 4746 4747 // Handling link key request requires remote supported features 4748 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4749 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4750 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4751 4752 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4753 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4754 if (have_link_key && security_level_sufficient){ 4755 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4756 } else { 4757 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4758 } 4759 return true; 4760 } 4761 4762 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4763 log_info("denying to pin request"); 4764 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4765 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4766 return true; 4767 } 4768 4769 // security assessment requires remote features 4770 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4771 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4772 hci_ssp_assess_security_on_io_cap_request(connection); 4773 // 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 4774 } 4775 4776 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4777 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4778 // set authentication requirements: 4779 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4780 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4781 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4782 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4783 authreq |= 1; 4784 } 4785 bool bonding = hci_stack->bondable; 4786 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4787 // if we have received IO Cap Response, we're in responder role 4788 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4789 if (bonding && !remote_bonding){ 4790 log_info("Remote not bonding, dropping local flag"); 4791 bonding = false; 4792 } 4793 } 4794 if (bonding){ 4795 if (connection->bonding_flags & BONDING_DEDICATED){ 4796 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4797 } else { 4798 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4799 } 4800 } 4801 uint8_t have_oob_data = 0; 4802 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4803 if (connection->classic_oob_c_192 != NULL){ 4804 have_oob_data |= 1; 4805 } 4806 if (connection->classic_oob_c_256 != NULL){ 4807 have_oob_data |= 2; 4808 } 4809 #endif 4810 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4811 return true; 4812 } 4813 4814 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4815 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4816 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4817 return true; 4818 } 4819 4820 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4821 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4822 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4823 const uint8_t zero[16] = { 0 }; 4824 const uint8_t * r_192 = zero; 4825 const uint8_t * c_192 = zero; 4826 const uint8_t * r_256 = zero; 4827 const uint8_t * c_256 = zero; 4828 // verify P-256 OOB 4829 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4830 c_256 = connection->classic_oob_c_256; 4831 if (connection->classic_oob_r_256 != NULL) { 4832 r_256 = connection->classic_oob_r_256; 4833 } 4834 } 4835 // verify P-192 OOB 4836 if ((connection->classic_oob_c_192 != NULL)) { 4837 c_192 = connection->classic_oob_c_192; 4838 if (connection->classic_oob_r_192 != NULL) { 4839 r_192 = connection->classic_oob_r_192; 4840 } 4841 } 4842 4843 // assess security 4844 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4845 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4846 if (need_level_4 && !can_reach_level_4){ 4847 log_info("Level 4 required, but not possible -> abort"); 4848 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4849 // send oob negative reply 4850 c_256 = NULL; 4851 c_192 = NULL; 4852 } 4853 4854 // Reply 4855 if (c_256 != zero) { 4856 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4857 } else if (c_192 != zero){ 4858 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4859 } else { 4860 hci_stack->classic_oob_con_handle = connection->con_handle; 4861 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4862 } 4863 return true; 4864 } 4865 #endif 4866 4867 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4868 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4869 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4870 return true; 4871 } 4872 4873 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4874 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4875 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4876 return true; 4877 } 4878 4879 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4880 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4881 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4882 return true; 4883 } 4884 4885 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4886 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4887 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4888 connection->state = SENT_DISCONNECT; 4889 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4890 return true; 4891 } 4892 4893 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4894 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4895 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4896 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4897 return true; 4898 } 4899 4900 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4901 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4902 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4903 return true; 4904 } 4905 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4906 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4907 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4908 return true; 4909 } 4910 #endif 4911 4912 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4913 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4914 #ifdef ENABLE_CLASSIC 4915 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4916 #endif 4917 if (connection->state != SENT_DISCONNECT){ 4918 connection->state = SENT_DISCONNECT; 4919 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4920 return true; 4921 } 4922 } 4923 4924 #ifdef ENABLE_CLASSIC 4925 uint16_t sniff_min_interval; 4926 switch (connection->sniff_min_interval){ 4927 case 0: 4928 break; 4929 case 0xffff: 4930 connection->sniff_min_interval = 0; 4931 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4932 return true; 4933 default: 4934 sniff_min_interval = connection->sniff_min_interval; 4935 connection->sniff_min_interval = 0; 4936 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4937 return true; 4938 } 4939 4940 if (connection->sniff_subrating_max_latency != 0xffff){ 4941 uint16_t max_latency = connection->sniff_subrating_max_latency; 4942 connection->sniff_subrating_max_latency = 0; 4943 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4944 return true; 4945 } 4946 4947 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4948 uint8_t service_type = (uint8_t) connection->qos_service_type; 4949 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4950 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); 4951 return true; 4952 } 4953 4954 if (connection->request_role != HCI_ROLE_INVALID){ 4955 hci_role_t role = connection->request_role; 4956 connection->request_role = HCI_ROLE_INVALID; 4957 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4958 return true; 4959 } 4960 #endif 4961 4962 #ifdef ENABLE_BLE 4963 switch (connection->le_con_parameter_update_state){ 4964 // response to L2CAP CON PARAMETER UPDATE REQUEST 4965 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4966 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4967 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4968 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4969 0x0000, 0xffff); 4970 return true; 4971 case CON_PARAMETER_UPDATE_REPLY: 4972 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4973 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4974 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4975 0x0000, 0xffff); 4976 return true; 4977 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4978 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4979 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4980 return true; 4981 default: 4982 break; 4983 } 4984 if (connection->le_phy_update_all_phys != 0xffu){ 4985 uint8_t all_phys = connection->le_phy_update_all_phys; 4986 connection->le_phy_update_all_phys = 0xff; 4987 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); 4988 return true; 4989 } 4990 #endif 4991 } 4992 return false; 4993 } 4994 4995 static void hci_run(void){ 4996 4997 bool done; 4998 4999 // send continuation fragments first, as they block the prepared packet buffer 5000 done = hci_run_acl_fragments(); 5001 if (done) return; 5002 5003 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5004 // send host num completed packets next as they don't require num_cmd_packets > 0 5005 if (!hci_can_send_comand_packet_transport()) return; 5006 if (hci_stack->host_completed_packets){ 5007 hci_host_num_completed_packets(); 5008 return; 5009 } 5010 #endif 5011 5012 if (!hci_can_send_command_packet_now()) return; 5013 5014 // global/non-connection oriented commands 5015 5016 5017 #ifdef ENABLE_CLASSIC 5018 // general gap classic 5019 done = hci_run_general_gap_classic(); 5020 if (done) return; 5021 #endif 5022 5023 #ifdef ENABLE_BLE 5024 // general gap le 5025 done = hci_run_general_gap_le(); 5026 if (done) return; 5027 #endif 5028 5029 // send pending HCI commands 5030 done = hci_run_general_pending_commands(); 5031 if (done) return; 5032 5033 // stack state sub statemachines 5034 hci_connection_t * connection; 5035 switch (hci_stack->state){ 5036 case HCI_STATE_INITIALIZING: 5037 hci_initializing_run(); 5038 break; 5039 5040 case HCI_STATE_HALTING: 5041 5042 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5043 switch (hci_stack->substate){ 5044 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5045 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5046 5047 #ifdef ENABLE_BLE 5048 #ifdef ENABLE_LE_CENTRAL 5049 // free whitelist entries 5050 { 5051 btstack_linked_list_iterator_t lit; 5052 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5053 while (btstack_linked_list_iterator_has_next(&lit)){ 5054 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5055 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5056 btstack_memory_whitelist_entry_free(entry); 5057 } 5058 } 5059 #endif 5060 #endif 5061 // close all open connections 5062 connection = (hci_connection_t *) hci_stack->connections; 5063 if (connection){ 5064 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5065 if (!hci_can_send_command_packet_now()) return; 5066 5067 // check state 5068 if (connection->state == SENT_DISCONNECT) return; 5069 connection->state = SENT_DISCONNECT; 5070 5071 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5072 5073 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5074 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5075 5076 // ... which would be ignored anyway as we shutdown (free) the connection now 5077 hci_shutdown_connection(connection); 5078 5079 // finally, send the disconnect command 5080 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5081 return; 5082 } 5083 5084 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5085 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5086 log_info("HCI_STATE_HALTING: wait 50 ms"); 5087 hci_stack->substate = HCI_HALTING_W4_TIMER; 5088 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5089 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5090 btstack_run_loop_add_timer(&hci_stack->timeout); 5091 break; 5092 } 5093 5094 /* fall through */ 5095 5096 case HCI_HALTING_CLOSE: 5097 log_info("HCI_STATE_HALTING, calling off"); 5098 5099 // switch mode 5100 hci_power_control_off(); 5101 5102 log_info("HCI_STATE_HALTING, emitting state"); 5103 hci_emit_state(); 5104 log_info("HCI_STATE_HALTING, done"); 5105 break; 5106 5107 case HCI_HALTING_W4_TIMER: 5108 // keep waiting 5109 5110 break; 5111 default: 5112 break; 5113 } 5114 5115 break; 5116 5117 case HCI_STATE_FALLING_ASLEEP: 5118 switch(hci_stack->substate) { 5119 case HCI_FALLING_ASLEEP_DISCONNECT: 5120 log_info("HCI_STATE_FALLING_ASLEEP"); 5121 // close all open connections 5122 connection = (hci_connection_t *) hci_stack->connections; 5123 if (connection){ 5124 5125 // send disconnect 5126 if (!hci_can_send_command_packet_now()) return; 5127 5128 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5129 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5130 5131 // send disconnected event right away - causes higher layer connections to get closed, too. 5132 hci_shutdown_connection(connection); 5133 return; 5134 } 5135 5136 if (hci_classic_supported()){ 5137 // disable page and inquiry scan 5138 if (!hci_can_send_command_packet_now()) return; 5139 5140 log_info("HCI_STATE_HALTING, disabling inq scans"); 5141 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5142 5143 // continue in next sub state 5144 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5145 break; 5146 } 5147 5148 /* fall through */ 5149 5150 case HCI_FALLING_ASLEEP_COMPLETE: 5151 log_info("HCI_STATE_HALTING, calling sleep"); 5152 // switch mode 5153 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5154 hci_emit_state(); 5155 break; 5156 5157 default: 5158 break; 5159 } 5160 break; 5161 5162 default: 5163 break; 5164 } 5165 } 5166 5167 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5168 // house-keeping 5169 5170 #ifdef ENABLE_CLASSIC 5171 bd_addr_t addr; 5172 hci_connection_t * conn; 5173 #endif 5174 #ifdef ENABLE_LE_CENTRAL 5175 uint8_t initiator_filter_policy; 5176 #endif 5177 5178 uint16_t opcode = little_endian_read_16(packet, 0); 5179 switch (opcode) { 5180 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5181 hci_stack->loopback_mode = packet[3]; 5182 break; 5183 5184 #ifdef ENABLE_CLASSIC 5185 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5186 reverse_bd_addr(&packet[3], addr); 5187 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5188 5189 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5190 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5191 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5192 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5193 } 5194 5195 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5196 if (!conn) { 5197 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5198 if (!conn) { 5199 // notify client that alloc failed 5200 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5201 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5202 } 5203 conn->state = SEND_CREATE_CONNECTION; 5204 conn->role = HCI_ROLE_MASTER; 5205 } 5206 5207 conn->con_handle = HCI_CON_HANDLE_INVALID; 5208 conn->role = HCI_ROLE_INVALID; 5209 5210 log_info("conn state %u", conn->state); 5211 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5212 switch (conn->state) { 5213 // if connection active exists 5214 case OPEN: 5215 // and OPEN, emit connection complete command 5216 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5217 // packet not sent to controller 5218 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5219 case RECEIVED_DISCONNECTION_COMPLETE: 5220 // create connection triggered in disconnect complete event, let's do it now 5221 break; 5222 case SEND_CREATE_CONNECTION: 5223 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5224 break; 5225 default: 5226 // otherwise, just ignore as it is already in the open process 5227 // packet not sent to controller 5228 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5229 } 5230 conn->state = SENT_CREATE_CONNECTION; 5231 5232 // track outgoing connection 5233 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5234 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5235 break; 5236 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5237 if (hci_stack->link_key_db) { 5238 reverse_bd_addr(&packet[3], addr); 5239 hci_stack->link_key_db->delete_link_key(addr); 5240 } 5241 break; 5242 5243 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5244 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5245 // setup_synchronous_connection? Voice setting at offset 22 5246 // TODO: compare to current setting if sco connection already active 5247 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5248 break; 5249 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5250 // accept_synchronus_connection? Voice setting at offset 18 5251 // TODO: compare to current setting if sco connection already active 5252 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5253 break; 5254 #endif 5255 #endif 5256 5257 #ifdef ENABLE_BLE 5258 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5259 hci_stack->le_random_address_set = 1; 5260 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5261 break; 5262 #ifdef ENABLE_LE_PERIPHERAL 5263 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5264 hci_stack->le_advertisements_active = packet[3] != 0; 5265 break; 5266 #endif 5267 #ifdef ENABLE_LE_CENTRAL 5268 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5269 // white list used? 5270 initiator_filter_policy = packet[7]; 5271 switch (initiator_filter_policy) { 5272 case 0: 5273 // whitelist not used 5274 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5275 break; 5276 case 1: 5277 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5278 break; 5279 default: 5280 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5281 break; 5282 } 5283 // track outgoing connection 5284 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5285 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5286 break; 5287 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5288 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5289 break; 5290 #endif 5291 #endif 5292 default: 5293 break; 5294 } 5295 5296 hci_stack->num_cmd_packets--; 5297 5298 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5299 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5300 if (err != 0){ 5301 return ERROR_CODE_HARDWARE_FAILURE; 5302 } 5303 return ERROR_CODE_SUCCESS; 5304 } 5305 5306 // disconnect because of security block 5307 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5308 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5309 if (!connection) return; 5310 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5311 } 5312 5313 5314 // Configure Secure Simple Pairing 5315 5316 #ifdef ENABLE_CLASSIC 5317 5318 // enable will enable SSP during init 5319 void gap_ssp_set_enable(int enable){ 5320 hci_stack->ssp_enable = enable; 5321 } 5322 5323 static int hci_local_ssp_activated(void){ 5324 return gap_ssp_supported() && hci_stack->ssp_enable; 5325 } 5326 5327 // if set, BTstack will respond to io capability request using authentication requirement 5328 void gap_ssp_set_io_capability(int io_capability){ 5329 hci_stack->ssp_io_capability = io_capability; 5330 } 5331 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5332 hci_stack->ssp_authentication_requirement = authentication_requirement; 5333 } 5334 5335 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5336 void gap_ssp_set_auto_accept(int auto_accept){ 5337 hci_stack->ssp_auto_accept = auto_accept; 5338 } 5339 5340 void gap_secure_connections_enable(bool enable){ 5341 hci_stack->secure_connections_enable = enable; 5342 } 5343 5344 #endif 5345 5346 // va_list part of hci_send_cmd 5347 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5348 if (!hci_can_send_command_packet_now()){ 5349 log_error("hci_send_cmd called but cannot send packet now"); 5350 return ERROR_CODE_COMMAND_DISALLOWED; 5351 } 5352 5353 // for HCI INITIALIZATION 5354 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5355 hci_stack->last_cmd_opcode = cmd->opcode; 5356 5357 hci_reserve_packet_buffer(); 5358 uint8_t * packet = hci_stack->hci_packet_buffer; 5359 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5360 uint8_t status = hci_send_cmd_packet(packet, size); 5361 5362 // release packet buffer on error or for synchronous transport implementations 5363 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5364 hci_release_packet_buffer(); 5365 hci_emit_transport_packet_sent(); 5366 } 5367 5368 return status; 5369 } 5370 5371 /** 5372 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5373 */ 5374 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5375 va_list argptr; 5376 va_start(argptr, cmd); 5377 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5378 va_end(argptr); 5379 return status; 5380 } 5381 5382 // Create various non-HCI events. 5383 // TODO: generalize, use table similar to hci_create_command 5384 5385 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5386 // dump packet 5387 if (dump) { 5388 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5389 } 5390 5391 // dispatch to all event handlers 5392 btstack_linked_list_iterator_t it; 5393 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5394 while (btstack_linked_list_iterator_has_next(&it)){ 5395 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5396 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5397 } 5398 } 5399 5400 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5401 if (!hci_stack->acl_packet_handler) return; 5402 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5403 } 5404 5405 #ifdef ENABLE_CLASSIC 5406 static void hci_notify_if_sco_can_send_now(void){ 5407 // notify SCO sender if waiting 5408 if (!hci_stack->sco_waiting_for_can_send_now) return; 5409 if (hci_can_send_sco_packet_now()){ 5410 hci_stack->sco_waiting_for_can_send_now = 0; 5411 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5412 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5413 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5414 } 5415 } 5416 5417 // parsing end emitting has been merged to reduce code size 5418 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5419 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5420 5421 uint8_t * eir_data; 5422 ad_context_t context; 5423 const uint8_t * name; 5424 uint8_t name_len; 5425 5426 if (size < 3) return; 5427 5428 int event_type = hci_event_packet_get_type(packet); 5429 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5430 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5431 5432 switch (event_type){ 5433 case HCI_EVENT_INQUIRY_RESULT: 5434 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5435 if (size != (3 + (num_responses * 14))) return; 5436 break; 5437 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5438 if (size != 257) return; 5439 if (num_responses != 1) return; 5440 break; 5441 default: 5442 return; 5443 } 5444 5445 // event[1] is set at the end 5446 int i; 5447 for (i=0; i<num_responses;i++){ 5448 memset(event, 0, sizeof(event)); 5449 event[0] = GAP_EVENT_INQUIRY_RESULT; 5450 uint8_t event_size = 27; // if name is not set by EIR 5451 5452 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5453 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5454 (void)memcpy(&event[9], 5455 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5456 3); // class of device 5457 (void)memcpy(&event[12], 5458 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5459 2); // clock offset 5460 5461 switch (event_type){ 5462 case HCI_EVENT_INQUIRY_RESULT: 5463 // 14,15,16,17 = 0, size 18 5464 break; 5465 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5466 event[14] = 1; 5467 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5468 // 16,17 = 0, size 18 5469 break; 5470 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5471 event[14] = 1; 5472 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5473 // EIR packets only contain a single inquiry response 5474 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5475 name = NULL; 5476 // Iterate over EIR data 5477 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5478 uint8_t data_type = ad_iterator_get_data_type(&context); 5479 uint8_t data_size = ad_iterator_get_data_len(&context); 5480 const uint8_t * data = ad_iterator_get_data(&context); 5481 // Prefer Complete Local Name over Shortened Local Name 5482 switch (data_type){ 5483 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5484 if (name) continue; 5485 /* fall through */ 5486 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5487 name = data; 5488 name_len = data_size; 5489 break; 5490 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5491 if (data_size != 8) break; 5492 event[16] = 1; 5493 memcpy(&event[17], data, 8); 5494 break; 5495 default: 5496 break; 5497 } 5498 } 5499 if (name){ 5500 event[25] = 1; 5501 // truncate name if needed 5502 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5503 event[26] = len; 5504 (void)memcpy(&event[27], name, len); 5505 event_size += len; 5506 } 5507 break; 5508 default: 5509 return; 5510 } 5511 event[1] = event_size - 2; 5512 hci_emit_event(event, event_size, 1); 5513 } 5514 } 5515 #endif 5516 5517 void hci_emit_state(void){ 5518 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5519 uint8_t event[3]; 5520 event[0] = BTSTACK_EVENT_STATE; 5521 event[1] = sizeof(event) - 2u; 5522 event[2] = hci_stack->state; 5523 hci_emit_event(event, sizeof(event), 1); 5524 } 5525 5526 #ifdef ENABLE_CLASSIC 5527 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5528 uint8_t event[13]; 5529 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5530 event[1] = sizeof(event) - 2; 5531 event[2] = status; 5532 little_endian_store_16(event, 3, con_handle); 5533 reverse_bd_addr(address, &event[5]); 5534 event[11] = 1; // ACL connection 5535 event[12] = 0; // encryption disabled 5536 hci_emit_event(event, sizeof(event), 1); 5537 } 5538 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5539 if (disable_l2cap_timeouts) return; 5540 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5541 uint8_t event[4]; 5542 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5543 event[1] = sizeof(event) - 2; 5544 little_endian_store_16(event, 2, conn->con_handle); 5545 hci_emit_event(event, sizeof(event), 1); 5546 } 5547 #endif 5548 5549 #ifdef ENABLE_BLE 5550 #ifdef ENABLE_LE_CENTRAL 5551 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){ 5552 uint8_t event[21]; 5553 event[0] = HCI_EVENT_LE_META; 5554 event[1] = sizeof(event) - 2u; 5555 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5556 event[3] = status; 5557 little_endian_store_16(event, 4, con_handle); 5558 event[6] = 0; // TODO: role 5559 event[7] = address_type; 5560 reverse_bd_addr(address, &event[8]); 5561 little_endian_store_16(event, 14, 0); // interval 5562 little_endian_store_16(event, 16, 0); // latency 5563 little_endian_store_16(event, 18, 0); // supervision timeout 5564 event[20] = 0; // master clock accuracy 5565 hci_emit_event(event, sizeof(event), 1); 5566 } 5567 #endif 5568 #endif 5569 5570 static void hci_emit_transport_packet_sent(void){ 5571 // notify upper stack that it might be possible to send again 5572 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5573 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5574 } 5575 5576 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5577 uint8_t event[6]; 5578 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5579 event[1] = sizeof(event) - 2u; 5580 event[2] = 0; // status = OK 5581 little_endian_store_16(event, 3, con_handle); 5582 event[5] = reason; 5583 hci_emit_event(event, sizeof(event), 1); 5584 } 5585 5586 static void hci_emit_nr_connections_changed(void){ 5587 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5588 uint8_t event[3]; 5589 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5590 event[1] = sizeof(event) - 2u; 5591 event[2] = nr_hci_connections(); 5592 hci_emit_event(event, sizeof(event), 1); 5593 } 5594 5595 static void hci_emit_hci_open_failed(void){ 5596 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5597 uint8_t event[2]; 5598 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5599 event[1] = sizeof(event) - 2u; 5600 hci_emit_event(event, sizeof(event), 1); 5601 } 5602 5603 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5604 log_info("hci_emit_dedicated_bonding_result %u ", status); 5605 uint8_t event[9]; 5606 int pos = 0; 5607 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5608 event[pos++] = sizeof(event) - 2u; 5609 event[pos++] = status; 5610 reverse_bd_addr(address, &event[pos]); 5611 hci_emit_event(event, sizeof(event), 1); 5612 } 5613 5614 5615 #ifdef ENABLE_CLASSIC 5616 5617 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5618 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5619 uint8_t event[5]; 5620 int pos = 0; 5621 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5622 event[pos++] = sizeof(event) - 2; 5623 little_endian_store_16(event, 2, con_handle); 5624 pos += 2; 5625 event[pos++] = level; 5626 hci_emit_event(event, sizeof(event), 1); 5627 } 5628 5629 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5630 if (!connection) return LEVEL_0; 5631 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5632 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5633 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5634 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5635 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5636 // LEVEL 4 always requires 128 bit encrytion key size 5637 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5638 security_level = LEVEL_3; 5639 } 5640 return security_level; 5641 } 5642 5643 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5644 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5645 uint8_t event[3]; 5646 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5647 event[1] = sizeof(event) - 2; 5648 event[2] = enabled; 5649 hci_emit_event(event, sizeof(event), 1); 5650 } 5651 5652 // query if remote side supports eSCO 5653 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5654 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5655 if (!connection) return false; 5656 return (connection->remote_supported_features[0] & 1) != 0; 5657 } 5658 5659 static bool hci_ssp_supported(hci_connection_t * connection){ 5660 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5661 return (connection->bonding_flags & mask) == mask; 5662 } 5663 5664 // query if remote side supports SSP 5665 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5666 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5667 if (!connection) return false; 5668 return hci_ssp_supported(connection) ? 1 : 0; 5669 } 5670 5671 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5672 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5673 } 5674 5675 // GAP API 5676 /** 5677 * @bbrief enable/disable bonding. default is enabled 5678 * @praram enabled 5679 */ 5680 void gap_set_bondable_mode(int enable){ 5681 hci_stack->bondable = enable ? 1 : 0; 5682 } 5683 /** 5684 * @brief Get bondable mode. 5685 * @return 1 if bondable 5686 */ 5687 int gap_get_bondable_mode(void){ 5688 return hci_stack->bondable; 5689 } 5690 5691 /** 5692 * @brief map link keys to security levels 5693 */ 5694 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5695 switch (link_key_type){ 5696 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5697 return LEVEL_4; 5698 case COMBINATION_KEY: 5699 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5700 return LEVEL_3; 5701 default: 5702 return LEVEL_2; 5703 } 5704 } 5705 5706 /** 5707 * @brief map link keys to secure connection yes/no 5708 */ 5709 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5710 switch (link_key_type){ 5711 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5712 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5713 return 1; 5714 default: 5715 return 0; 5716 } 5717 } 5718 5719 /** 5720 * @brief map link keys to authenticated 5721 */ 5722 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5723 switch (link_key_type){ 5724 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5725 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5726 return 1; 5727 default: 5728 return 0; 5729 } 5730 } 5731 5732 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5733 log_info("gap_mitm_protection_required_for_security_level %u", level); 5734 return level > LEVEL_2; 5735 } 5736 5737 /** 5738 * @brief get current security level 5739 */ 5740 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5741 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5742 if (!connection) return LEVEL_0; 5743 return gap_security_level_for_connection(connection); 5744 } 5745 5746 /** 5747 * @brief request connection to device to 5748 * @result GAP_AUTHENTICATION_RESULT 5749 */ 5750 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5751 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5752 if (!connection){ 5753 hci_emit_security_level(con_handle, LEVEL_0); 5754 return; 5755 } 5756 5757 btstack_assert(hci_is_le_connection(connection) == false); 5758 5759 // 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) 5760 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5761 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5762 requested_level = LEVEL_4; 5763 } 5764 5765 gap_security_level_t current_level = gap_security_level(con_handle); 5766 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5767 requested_level, connection->requested_security_level, current_level); 5768 5769 // authentication active if authentication request was sent or planned level > 0 5770 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5771 if (authentication_active){ 5772 // authentication already active 5773 if (connection->requested_security_level < requested_level){ 5774 // increase requested level as new level is higher 5775 // TODO: handle re-authentication when done 5776 connection->requested_security_level = requested_level; 5777 } 5778 } else { 5779 // no request active, notify if security sufficient 5780 if (requested_level <= current_level){ 5781 hci_emit_security_level(con_handle, current_level); 5782 return; 5783 } 5784 5785 // store request 5786 connection->requested_security_level = requested_level; 5787 5788 // start to authenticate connection 5789 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5790 hci_run(); 5791 } 5792 } 5793 5794 /** 5795 * @brief start dedicated bonding with device. disconnect after bonding 5796 * @param device 5797 * @param request MITM protection 5798 * @result GAP_DEDICATED_BONDING_COMPLETE 5799 */ 5800 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5801 5802 // create connection state machine 5803 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5804 5805 if (!connection){ 5806 return BTSTACK_MEMORY_ALLOC_FAILED; 5807 } 5808 5809 // delete linkn key 5810 gap_drop_link_key_for_bd_addr(device); 5811 5812 // configure LEVEL_2/3, dedicated bonding 5813 connection->state = SEND_CREATE_CONNECTION; 5814 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5815 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5816 connection->bonding_flags = BONDING_DEDICATED; 5817 5818 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5819 5820 // handle: connnection failure (connection complete != ok) 5821 // handle: authentication failure 5822 // handle: disconnect on done 5823 5824 hci_run(); 5825 5826 return 0; 5827 } 5828 5829 void gap_set_local_name(const char * local_name){ 5830 hci_stack->local_name = local_name; 5831 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5832 // also update EIR if not set by user 5833 if (hci_stack->eir_data == NULL){ 5834 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5835 } 5836 hci_run(); 5837 } 5838 #endif 5839 5840 5841 #ifdef ENABLE_BLE 5842 5843 #ifdef ENABLE_LE_CENTRAL 5844 void gap_start_scan(void){ 5845 hci_stack->le_scanning_enabled = true; 5846 hci_run(); 5847 } 5848 5849 void gap_stop_scan(void){ 5850 hci_stack->le_scanning_enabled = false; 5851 hci_run(); 5852 } 5853 5854 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5855 hci_stack->le_scan_type = scan_type; 5856 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5857 hci_stack->le_scan_interval = scan_interval; 5858 hci_stack->le_scan_window = scan_window; 5859 hci_stack->le_scanning_param_update = true; 5860 hci_run(); 5861 } 5862 5863 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5864 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5865 } 5866 5867 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5868 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5869 if (!conn){ 5870 // disallow if le connection is already outgoing 5871 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5872 log_error("le connection already active"); 5873 return ERROR_CODE_COMMAND_DISALLOWED; 5874 } 5875 5876 log_info("gap_connect: no connection exists yet, creating context"); 5877 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5878 if (!conn){ 5879 // notify client that alloc failed 5880 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5881 log_info("gap_connect: failed to alloc hci_connection_t"); 5882 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5883 } 5884 5885 // set le connecting state 5886 if (hci_is_le_connection_type(addr_type)){ 5887 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5888 } 5889 5890 conn->state = SEND_CREATE_CONNECTION; 5891 log_info("gap_connect: send create connection next"); 5892 hci_run(); 5893 return ERROR_CODE_SUCCESS; 5894 } 5895 5896 if (!hci_is_le_connection(conn) || 5897 (conn->state == SEND_CREATE_CONNECTION) || 5898 (conn->state == SENT_CREATE_CONNECTION)) { 5899 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5900 log_error("gap_connect: classic connection or connect is already being created"); 5901 return GATT_CLIENT_IN_WRONG_STATE; 5902 } 5903 5904 // check if connection was just disconnected 5905 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5906 log_info("gap_connect: send create connection (again)"); 5907 conn->state = SEND_CREATE_CONNECTION; 5908 hci_run(); 5909 return ERROR_CODE_SUCCESS; 5910 } 5911 5912 log_info("gap_connect: context exists with state %u", conn->state); 5913 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5914 hci_run(); 5915 return ERROR_CODE_SUCCESS; 5916 } 5917 5918 // @assumption: only a single outgoing LE Connection exists 5919 static hci_connection_t * gap_get_outgoing_connection(void){ 5920 btstack_linked_item_t *it; 5921 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5922 hci_connection_t * conn = (hci_connection_t *) it; 5923 if (!hci_is_le_connection(conn)) continue; 5924 switch (conn->state){ 5925 case SEND_CREATE_CONNECTION: 5926 case SENT_CREATE_CONNECTION: 5927 case SENT_CANCEL_CONNECTION: 5928 return conn; 5929 default: 5930 break; 5931 }; 5932 } 5933 return NULL; 5934 } 5935 5936 uint8_t gap_connect_cancel(void){ 5937 hci_connection_t * conn = gap_get_outgoing_connection(); 5938 if (!conn) return 0; 5939 switch (conn->state){ 5940 case SEND_CREATE_CONNECTION: 5941 // skip sending create connection and emit event instead 5942 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5943 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5944 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5945 btstack_memory_hci_connection_free( conn ); 5946 break; 5947 case SENT_CREATE_CONNECTION: 5948 // request to send cancel connection 5949 conn->state = SEND_CANCEL_CONNECTION; 5950 hci_run(); 5951 break; 5952 default: 5953 break; 5954 } 5955 return 0; 5956 } 5957 #endif 5958 5959 #ifdef ENABLE_LE_CENTRAL 5960 /** 5961 * @brief Set connection parameters for outgoing connections 5962 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5963 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5964 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5965 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5966 * @param conn_latency, default: 4 5967 * @param supervision_timeout (unit: 10ms), default: 720 ms 5968 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5969 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5970 */ 5971 5972 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5973 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5974 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5975 hci_stack->le_connection_scan_interval = conn_scan_interval; 5976 hci_stack->le_connection_scan_window = conn_scan_window; 5977 hci_stack->le_connection_interval_min = conn_interval_min; 5978 hci_stack->le_connection_interval_max = conn_interval_max; 5979 hci_stack->le_connection_latency = conn_latency; 5980 hci_stack->le_supervision_timeout = supervision_timeout; 5981 hci_stack->le_minimum_ce_length = min_ce_length; 5982 hci_stack->le_maximum_ce_length = max_ce_length; 5983 } 5984 #endif 5985 5986 /** 5987 * @brief Updates the connection parameters for a given LE connection 5988 * @param handle 5989 * @param conn_interval_min (unit: 1.25ms) 5990 * @param conn_interval_max (unit: 1.25ms) 5991 * @param conn_latency 5992 * @param supervision_timeout (unit: 10ms) 5993 * @returns 0 if ok 5994 */ 5995 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5996 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5997 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5998 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5999 connection->le_conn_interval_min = conn_interval_min; 6000 connection->le_conn_interval_max = conn_interval_max; 6001 connection->le_conn_latency = conn_latency; 6002 connection->le_supervision_timeout = supervision_timeout; 6003 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6004 hci_run(); 6005 return 0; 6006 } 6007 6008 /** 6009 * @brief Request an update of the connection parameter for a given LE connection 6010 * @param handle 6011 * @param conn_interval_min (unit: 1.25ms) 6012 * @param conn_interval_max (unit: 1.25ms) 6013 * @param conn_latency 6014 * @param supervision_timeout (unit: 10ms) 6015 * @returns 0 if ok 6016 */ 6017 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6018 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6019 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6020 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6021 connection->le_conn_interval_min = conn_interval_min; 6022 connection->le_conn_interval_max = conn_interval_max; 6023 connection->le_conn_latency = conn_latency; 6024 connection->le_supervision_timeout = supervision_timeout; 6025 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6026 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6027 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6028 return 0; 6029 } 6030 6031 #ifdef ENABLE_LE_PERIPHERAL 6032 6033 /** 6034 * @brief Set Advertisement Data 6035 * @param advertising_data_length 6036 * @param advertising_data (max 31 octets) 6037 * @note data is not copied, pointer has to stay valid 6038 */ 6039 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6040 hci_stack->le_advertisements_data_len = advertising_data_length; 6041 hci_stack->le_advertisements_data = advertising_data; 6042 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6043 hci_run(); 6044 } 6045 6046 /** 6047 * @brief Set Scan Response Data 6048 * @param advertising_data_length 6049 * @param advertising_data (max 31 octets) 6050 * @note data is not copied, pointer has to stay valid 6051 */ 6052 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6053 hci_stack->le_scan_response_data_len = scan_response_data_length; 6054 hci_stack->le_scan_response_data = scan_response_data; 6055 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6056 hci_run(); 6057 } 6058 6059 /** 6060 * @brief Set Advertisement Parameters 6061 * @param adv_int_min 6062 * @param adv_int_max 6063 * @param adv_type 6064 * @param direct_address_type 6065 * @param direct_address 6066 * @param channel_map 6067 * @param filter_policy 6068 * 6069 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6070 */ 6071 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6072 uint8_t direct_address_typ, bd_addr_t direct_address, 6073 uint8_t channel_map, uint8_t filter_policy) { 6074 6075 hci_stack->le_advertisements_interval_min = adv_int_min; 6076 hci_stack->le_advertisements_interval_max = adv_int_max; 6077 hci_stack->le_advertisements_type = adv_type; 6078 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6079 hci_stack->le_advertisements_channel_map = channel_map; 6080 hci_stack->le_advertisements_filter_policy = filter_policy; 6081 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6082 6); 6083 6084 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6085 hci_run(); 6086 } 6087 6088 /** 6089 * @brief Enable/Disable Advertisements 6090 * @param enabled 6091 */ 6092 void gap_advertisements_enable(int enabled){ 6093 hci_stack->le_advertisements_enabled = enabled != 0; 6094 hci_update_advertisements_enabled_for_current_roles(); 6095 hci_run(); 6096 } 6097 6098 #endif 6099 6100 void hci_le_set_own_address_type(uint8_t own_address_type){ 6101 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6102 if (own_address_type == hci_stack->le_own_addr_type) return; 6103 hci_stack->le_own_addr_type = own_address_type; 6104 6105 #ifdef ENABLE_LE_PERIPHERAL 6106 // update advertisement parameters, too 6107 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6108 hci_run(); 6109 #endif 6110 #ifdef ENABLE_LE_CENTRAL 6111 // note: we don't update scan parameters or modify ongoing connection attempts 6112 #endif 6113 } 6114 6115 #endif 6116 6117 uint8_t gap_disconnect(hci_con_handle_t handle){ 6118 hci_connection_t * conn = hci_connection_for_handle(handle); 6119 if (!conn){ 6120 hci_emit_disconnection_complete(handle, 0); 6121 return 0; 6122 } 6123 // ignore if already disconnected 6124 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6125 return 0; 6126 } 6127 conn->state = SEND_DISCONNECT; 6128 hci_run(); 6129 return 0; 6130 } 6131 6132 int gap_read_rssi(hci_con_handle_t con_handle){ 6133 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6134 if (hci_connection == NULL) return 0; 6135 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6136 hci_run(); 6137 return 1; 6138 } 6139 6140 /** 6141 * @brief Get connection type 6142 * @param con_handle 6143 * @result connection_type 6144 */ 6145 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6146 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6147 if (!conn) return GAP_CONNECTION_INVALID; 6148 switch (conn->address_type){ 6149 case BD_ADDR_TYPE_LE_PUBLIC: 6150 case BD_ADDR_TYPE_LE_RANDOM: 6151 return GAP_CONNECTION_LE; 6152 case BD_ADDR_TYPE_SCO: 6153 return GAP_CONNECTION_SCO; 6154 case BD_ADDR_TYPE_ACL: 6155 return GAP_CONNECTION_ACL; 6156 default: 6157 return GAP_CONNECTION_INVALID; 6158 } 6159 } 6160 6161 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6162 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6163 if (!conn) return HCI_ROLE_INVALID; 6164 return (hci_role_t) conn->role; 6165 } 6166 6167 6168 #ifdef ENABLE_CLASSIC 6169 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6170 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6171 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6172 conn->request_role = role; 6173 hci_run(); 6174 return ERROR_CODE_SUCCESS; 6175 } 6176 #endif 6177 6178 #ifdef ENABLE_BLE 6179 6180 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){ 6181 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6182 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6183 6184 conn->le_phy_update_all_phys = all_phys; 6185 conn->le_phy_update_tx_phys = tx_phys; 6186 conn->le_phy_update_rx_phys = rx_phys; 6187 conn->le_phy_update_phy_options = phy_options; 6188 6189 hci_run(); 6190 6191 return 0; 6192 } 6193 6194 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6195 // check if already in list 6196 btstack_linked_list_iterator_t it; 6197 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6198 while (btstack_linked_list_iterator_has_next(&it)) { 6199 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6200 if (entry->address_type != address_type) { 6201 continue; 6202 } 6203 if (memcmp(entry->address, address, 6) != 0) { 6204 continue; 6205 } 6206 // disallow if already scheduled to add 6207 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6208 return ERROR_CODE_COMMAND_DISALLOWED; 6209 } 6210 // still on controller, but scheduled to remove -> re-add 6211 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6212 return ERROR_CODE_SUCCESS; 6213 } 6214 // alloc and add to list 6215 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6216 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6217 entry->address_type = address_type; 6218 (void)memcpy(entry->address, address, 6); 6219 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6220 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6221 return ERROR_CODE_SUCCESS; 6222 } 6223 6224 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6225 btstack_linked_list_iterator_t it; 6226 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6227 while (btstack_linked_list_iterator_has_next(&it)){ 6228 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6229 if (entry->address_type != address_type) { 6230 continue; 6231 } 6232 if (memcmp(entry->address, address, 6) != 0) { 6233 continue; 6234 } 6235 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6236 // remove from controller if already present 6237 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6238 } else { 6239 // directly remove entry from whitelist 6240 btstack_linked_list_iterator_remove(&it); 6241 btstack_memory_whitelist_entry_free(entry); 6242 } 6243 return ERROR_CODE_SUCCESS; 6244 } 6245 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6246 } 6247 6248 static void hci_whitelist_clear(void){ 6249 btstack_linked_list_iterator_t it; 6250 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6251 while (btstack_linked_list_iterator_has_next(&it)){ 6252 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6253 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6254 // remove from controller if already present 6255 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6256 continue; 6257 } 6258 // directly remove entry from whitelist 6259 btstack_linked_list_iterator_remove(&it); 6260 btstack_memory_whitelist_entry_free(entry); 6261 } 6262 } 6263 6264 /** 6265 * @brief Clear Whitelist 6266 * @returns 0 if ok 6267 */ 6268 uint8_t gap_whitelist_clear(void){ 6269 hci_whitelist_clear(); 6270 hci_run(); 6271 return ERROR_CODE_SUCCESS; 6272 } 6273 6274 /** 6275 * @brief Add Device to Whitelist 6276 * @param address_typ 6277 * @param address 6278 * @returns 0 if ok 6279 */ 6280 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6281 uint8_t status = hci_whitelist_add(address_type, address); 6282 if (status){ 6283 return status; 6284 } 6285 hci_run(); 6286 return ERROR_CODE_SUCCESS; 6287 } 6288 6289 /** 6290 * @brief Remove Device from Whitelist 6291 * @param address_typ 6292 * @param address 6293 * @returns 0 if ok 6294 */ 6295 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6296 uint8_t status = hci_whitelist_remove(address_type, address); 6297 if (status){ 6298 return status; 6299 } 6300 hci_run(); 6301 return ERROR_CODE_SUCCESS; 6302 } 6303 6304 #ifdef ENABLE_LE_CENTRAL 6305 /** 6306 * @brief Connect with Whitelist 6307 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6308 * @returns - if ok 6309 */ 6310 uint8_t gap_connect_with_whitelist(void){ 6311 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6312 return ERROR_CODE_COMMAND_DISALLOWED; 6313 } 6314 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6315 hci_run(); 6316 return ERROR_CODE_SUCCESS; 6317 } 6318 6319 /** 6320 * @brief Auto Connection Establishment - Start Connecting to device 6321 * @param address_typ 6322 * @param address 6323 * @returns 0 if ok 6324 */ 6325 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6326 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6327 return ERROR_CODE_COMMAND_DISALLOWED; 6328 } 6329 6330 uint8_t status = hci_whitelist_add(address_type, address); 6331 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6332 return status; 6333 } 6334 6335 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6336 6337 hci_run(); 6338 return ERROR_CODE_SUCCESS; 6339 } 6340 6341 /** 6342 * @brief Auto Connection Establishment - Stop Connecting to device 6343 * @param address_typ 6344 * @param address 6345 * @returns 0 if ok 6346 */ 6347 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6348 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6349 return ERROR_CODE_COMMAND_DISALLOWED; 6350 } 6351 6352 hci_whitelist_remove(address_type, address); 6353 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6354 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6355 } 6356 hci_run(); 6357 return 0; 6358 } 6359 6360 /** 6361 * @brief Auto Connection Establishment - Stop everything 6362 * @note Convenience function to stop all active auto connection attempts 6363 */ 6364 uint8_t gap_auto_connection_stop_all(void){ 6365 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6366 return ERROR_CODE_COMMAND_DISALLOWED; 6367 } 6368 hci_whitelist_clear(); 6369 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6370 hci_run(); 6371 return ERROR_CODE_SUCCESS; 6372 } 6373 6374 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6375 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6376 if (!conn) return 0; 6377 return conn->le_connection_interval; 6378 } 6379 #endif 6380 #endif 6381 6382 #ifdef ENABLE_CLASSIC 6383 /** 6384 * @brief Set Extended Inquiry Response data 6385 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6386 * @note has to be done before stack starts up 6387 */ 6388 void gap_set_extended_inquiry_response(const uint8_t * data){ 6389 hci_stack->eir_data = data; 6390 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6391 hci_run(); 6392 } 6393 6394 /** 6395 * @brief Start GAP Classic Inquiry 6396 * @param duration in 1.28s units 6397 * @return 0 if ok 6398 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6399 */ 6400 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6401 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6402 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6403 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6404 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6405 } 6406 hci_stack->inquiry_state = duration_in_1280ms_units; 6407 hci_run(); 6408 return 0; 6409 } 6410 6411 /** 6412 * @brief Stop GAP Classic Inquiry 6413 * @returns 0 if ok 6414 */ 6415 int gap_inquiry_stop(void){ 6416 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6417 // emit inquiry complete event, before it even started 6418 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6419 hci_emit_event(event, sizeof(event), 1); 6420 return 0; 6421 } 6422 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6423 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6424 hci_run(); 6425 return 0; 6426 } 6427 6428 void gap_inquiry_set_lap(uint32_t lap){ 6429 hci_stack->inquiry_lap = lap; 6430 } 6431 6432 6433 /** 6434 * @brief Remote Name Request 6435 * @param addr 6436 * @param page_scan_repetition_mode 6437 * @param clock_offset only used when bit 15 is set 6438 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6439 */ 6440 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6441 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6442 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6443 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6444 hci_stack->remote_name_clock_offset = clock_offset; 6445 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6446 hci_run(); 6447 return 0; 6448 } 6449 6450 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6451 hci_stack->gap_pairing_state = state; 6452 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6453 hci_run(); 6454 return 0; 6455 } 6456 6457 /** 6458 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6459 * @param addr 6460 * @param pin_data 6461 * @param pin_len 6462 * @return 0 if ok 6463 */ 6464 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6465 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6466 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6467 hci_stack->gap_pairing_pin_len = pin_len; 6468 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6469 } 6470 6471 /** 6472 * @brief Legacy Pairing Pin Code Response 6473 * @param addr 6474 * @param pin 6475 * @return 0 if ok 6476 */ 6477 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6478 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6479 } 6480 6481 /** 6482 * @brief Abort Legacy Pairing 6483 * @param addr 6484 * @param pin 6485 * @return 0 if ok 6486 */ 6487 int gap_pin_code_negative(bd_addr_t addr){ 6488 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6489 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6490 } 6491 6492 /** 6493 * @brief SSP Passkey Response 6494 * @param addr 6495 * @param passkey 6496 * @return 0 if ok 6497 */ 6498 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6499 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6500 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6501 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6502 } 6503 6504 /** 6505 * @brief Abort SSP Passkey Entry/Pairing 6506 * @param addr 6507 * @param pin 6508 * @return 0 if ok 6509 */ 6510 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6511 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6512 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6513 } 6514 6515 /** 6516 * @brief Accept SSP Numeric Comparison 6517 * @param addr 6518 * @param passkey 6519 * @return 0 if ok 6520 */ 6521 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6522 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6523 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6524 } 6525 6526 /** 6527 * @brief Abort SSP Numeric Comparison/Pairing 6528 * @param addr 6529 * @param pin 6530 * @return 0 if ok 6531 */ 6532 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6533 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6534 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6535 } 6536 6537 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6538 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6539 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6540 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6541 connectionSetAuthenticationFlags(conn, flag); 6542 hci_run(); 6543 return ERROR_CODE_SUCCESS; 6544 } 6545 #endif 6546 6547 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6548 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6549 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6550 } 6551 6552 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6553 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6554 } 6555 #endif 6556 6557 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6558 /** 6559 * @brief Report Remote OOB Data 6560 * @param bd_addr 6561 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6562 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6563 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6564 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6565 */ 6566 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){ 6567 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6568 if (connection == NULL) { 6569 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6570 } 6571 connection->classic_oob_c_192 = c_192; 6572 connection->classic_oob_r_192 = r_192; 6573 6574 // ignore P-256 if not supported by us 6575 if (hci_stack->secure_connections_active){ 6576 connection->classic_oob_c_256 = c_256; 6577 connection->classic_oob_r_256 = r_256; 6578 } 6579 6580 return ERROR_CODE_SUCCESS; 6581 } 6582 /** 6583 * @brief Generate new OOB data 6584 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6585 */ 6586 void gap_ssp_generate_oob_data(void){ 6587 hci_stack->classic_read_local_oob_data = true; 6588 hci_run(); 6589 } 6590 6591 #endif 6592 6593 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6594 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6595 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6596 if (connection == NULL) { 6597 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6598 } 6599 6600 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6601 connection->link_key_type = type; 6602 6603 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6604 } 6605 6606 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6607 /** 6608 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6609 * @param inquiry_mode see bluetooth_defines.h 6610 */ 6611 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6612 hci_stack->inquiry_mode = inquiry_mode; 6613 } 6614 6615 /** 6616 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6617 */ 6618 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6619 hci_stack->sco_voice_setting = voice_setting; 6620 } 6621 6622 /** 6623 * @brief Get SCO Voice Setting 6624 * @return current voice setting 6625 */ 6626 uint16_t hci_get_sco_voice_setting(void){ 6627 return hci_stack->sco_voice_setting; 6628 } 6629 6630 static int hci_have_usb_transport(void){ 6631 if (!hci_stack->hci_transport) return 0; 6632 const char * transport_name = hci_stack->hci_transport->name; 6633 if (!transport_name) return 0; 6634 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6635 } 6636 6637 /** @brief Get SCO packet length for current SCO Voice setting 6638 * @note Using SCO packets of the exact length is required for USB transfer 6639 * @return Length of SCO packets in bytes (not audio frames) 6640 */ 6641 uint16_t hci_get_sco_packet_length(void){ 6642 uint16_t sco_packet_length = 0; 6643 6644 #ifdef ENABLE_SCO_OVER_HCI 6645 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6646 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6647 6648 if (hci_have_usb_transport()){ 6649 // see Core Spec for H2 USB Transfer. 6650 // 3 byte SCO header + 24 bytes per connection 6651 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6652 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6653 } else { 6654 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6655 sco_packet_length = 3 + 60 * multiplier; 6656 // assert that it still fits inside an SCO buffer 6657 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6658 sco_packet_length = 3 + 60; 6659 } 6660 } 6661 #endif 6662 6663 #ifdef HAVE_SCO_TRANSPORT 6664 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6665 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6666 sco_packet_length = 3 + 60 * multiplier; 6667 #endif 6668 return sco_packet_length; 6669 } 6670 6671 /** 6672 * @brief Sets the master/slave policy 6673 * @param policy (0: attempt to become master, 1: let connecting device decide) 6674 */ 6675 void hci_set_master_slave_policy(uint8_t policy){ 6676 hci_stack->master_slave_policy = policy; 6677 } 6678 6679 #endif 6680 6681 HCI_STATE hci_get_state(void){ 6682 return hci_stack->state; 6683 } 6684 6685 #ifdef ENABLE_CLASSIC 6686 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6687 hci_stack->gap_classic_accept_callback = accept_callback; 6688 } 6689 #endif 6690 6691 /** 6692 * @brief Set callback for Bluetooth Hardware Error 6693 */ 6694 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6695 hci_stack->hardware_error_callback = fn; 6696 } 6697 6698 void hci_disconnect_all(void){ 6699 btstack_linked_list_iterator_t it; 6700 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6701 while (btstack_linked_list_iterator_has_next(&it)){ 6702 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6703 if (con->state == SENT_DISCONNECT) continue; 6704 con->state = SEND_DISCONNECT; 6705 } 6706 hci_run(); 6707 } 6708 6709 uint16_t hci_get_manufacturer(void){ 6710 return hci_stack->manufacturer; 6711 } 6712 6713 #ifdef ENABLE_BLE 6714 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6715 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6716 if (!hci_con) return NULL; 6717 return &hci_con->sm_connection; 6718 } 6719 6720 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6721 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6722 #endif 6723 6724 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6725 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6726 if (hci_connection == NULL) return 0; 6727 if (hci_is_le_connection(hci_connection)){ 6728 #ifdef ENABLE_BLE 6729 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6730 if (sm_conn->sm_connection_encrypted) { 6731 return sm_conn->sm_actual_encryption_key_size; 6732 } 6733 #endif 6734 } else { 6735 #ifdef ENABLE_CLASSIC 6736 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6737 return hci_connection->encryption_key_size; 6738 } 6739 #endif 6740 } 6741 return 0; 6742 } 6743 6744 int gap_authenticated(hci_con_handle_t con_handle){ 6745 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6746 if (hci_connection == NULL) return 0; 6747 6748 switch (hci_connection->address_type){ 6749 #ifdef ENABLE_BLE 6750 case BD_ADDR_TYPE_LE_PUBLIC: 6751 case BD_ADDR_TYPE_LE_RANDOM: 6752 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6753 return hci_connection->sm_connection.sm_connection_authenticated; 6754 #endif 6755 #ifdef ENABLE_CLASSIC 6756 case BD_ADDR_TYPE_SCO: 6757 case BD_ADDR_TYPE_ACL: 6758 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6759 #endif 6760 default: 6761 return 0; 6762 } 6763 } 6764 6765 int gap_secure_connection(hci_con_handle_t con_handle){ 6766 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6767 if (hci_connection == NULL) return 0; 6768 6769 switch (hci_connection->address_type){ 6770 #ifdef ENABLE_BLE 6771 case BD_ADDR_TYPE_LE_PUBLIC: 6772 case BD_ADDR_TYPE_LE_RANDOM: 6773 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6774 return hci_connection->sm_connection.sm_connection_sc; 6775 #endif 6776 #ifdef ENABLE_CLASSIC 6777 case BD_ADDR_TYPE_SCO: 6778 case BD_ADDR_TYPE_ACL: 6779 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6780 #endif 6781 default: 6782 return 0; 6783 } 6784 } 6785 6786 bool gap_bonded(hci_con_handle_t con_handle){ 6787 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6788 if (hci_connection == NULL) return 0; 6789 6790 #ifdef ENABLE_CLASSIC 6791 link_key_t link_key; 6792 link_key_type_t link_key_type; 6793 #endif 6794 switch (hci_connection->address_type){ 6795 #ifdef ENABLE_BLE 6796 case BD_ADDR_TYPE_LE_PUBLIC: 6797 case BD_ADDR_TYPE_LE_RANDOM: 6798 return hci_connection->sm_connection.sm_le_db_index >= 0; 6799 #endif 6800 #ifdef ENABLE_CLASSIC 6801 case BD_ADDR_TYPE_SCO: 6802 case BD_ADDR_TYPE_ACL: 6803 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6804 #endif 6805 default: 6806 return false; 6807 } 6808 } 6809 6810 #ifdef ENABLE_BLE 6811 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6812 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6813 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6814 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6815 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6816 return sm_conn->sm_connection_authorization_state; 6817 } 6818 #endif 6819 6820 #ifdef ENABLE_CLASSIC 6821 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){ 6822 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6823 if (!conn) return GAP_CONNECTION_INVALID; 6824 conn->sniff_min_interval = sniff_min_interval; 6825 conn->sniff_max_interval = sniff_max_interval; 6826 conn->sniff_attempt = sniff_attempt; 6827 conn->sniff_timeout = sniff_timeout; 6828 hci_run(); 6829 return 0; 6830 } 6831 6832 /** 6833 * @brief Exit Sniff mode 6834 * @param con_handle 6835 @ @return 0 if ok 6836 */ 6837 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6838 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6839 if (!conn) return GAP_CONNECTION_INVALID; 6840 conn->sniff_min_interval = 0xffff; 6841 hci_run(); 6842 return 0; 6843 } 6844 6845 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){ 6846 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6847 if (!conn) return GAP_CONNECTION_INVALID; 6848 conn->sniff_subrating_max_latency = max_latency; 6849 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6850 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6851 hci_run(); 6852 return ERROR_CODE_SUCCESS; 6853 } 6854 6855 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){ 6856 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6857 if (!conn) return GAP_CONNECTION_INVALID; 6858 conn->qos_service_type = service_type; 6859 conn->qos_token_rate = token_rate; 6860 conn->qos_peak_bandwidth = peak_bandwidth; 6861 conn->qos_latency = latency; 6862 conn->qos_delay_variation = delay_variation; 6863 hci_run(); 6864 return ERROR_CODE_SUCCESS; 6865 } 6866 6867 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6868 hci_stack->new_page_scan_interval = page_scan_interval; 6869 hci_stack->new_page_scan_window = page_scan_window; 6870 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6871 hci_run(); 6872 } 6873 6874 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6875 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6876 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6877 hci_run(); 6878 } 6879 6880 #endif 6881 6882 void hci_halting_defer(void){ 6883 if (hci_stack->state != HCI_STATE_HALTING) return; 6884 switch (hci_stack->substate){ 6885 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6886 case HCI_HALTING_CLOSE: 6887 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6888 break; 6889 default: 6890 break; 6891 } 6892 } 6893 6894 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6895 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6896 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6897 if (le_device_db_index >= le_device_db_max_count()) return; 6898 uint8_t offset = le_device_db_index >> 3; 6899 uint8_t mask = 1 << (le_device_db_index & 7); 6900 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6901 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6902 // note: go back to remove entries, otherwise, a remove + add will skip the add 6903 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6904 } 6905 } 6906 6907 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6908 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6909 if (le_device_db_index >= le_device_db_max_count()) return; 6910 uint8_t offset = le_device_db_index >> 3; 6911 uint8_t mask = 1 << (le_device_db_index & 7); 6912 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6913 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6914 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6915 } 6916 } 6917 6918 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6919 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6920 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6921 } 6922 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6923 // restart le resolving list update 6924 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6925 } 6926 return ERROR_CODE_SUCCESS; 6927 } 6928 #endif 6929 6930 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6931 void hci_setup_test_connections_fuzz(void){ 6932 hci_connection_t * conn; 6933 6934 // default address: 66:55:44:33:00:01 6935 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6936 6937 // setup Controller info 6938 hci_stack->num_cmd_packets = 255; 6939 hci_stack->acl_packets_total_num = 255; 6940 6941 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6942 addr[5] = 0x01; 6943 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6944 conn->con_handle = addr[5]; 6945 conn->role = HCI_ROLE_SLAVE; 6946 conn->state = RECEIVED_CONNECTION_REQUEST; 6947 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6948 6949 // setup incoming Classic SCO connection with con handle 0x0002 6950 addr[5] = 0x02; 6951 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6952 conn->con_handle = addr[5]; 6953 conn->role = HCI_ROLE_SLAVE; 6954 conn->state = RECEIVED_CONNECTION_REQUEST; 6955 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6956 6957 // setup ready Classic ACL connection with con handle 0x0003 6958 addr[5] = 0x03; 6959 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6960 conn->con_handle = addr[5]; 6961 conn->role = HCI_ROLE_SLAVE; 6962 conn->state = OPEN; 6963 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6964 6965 // setup ready Classic SCO connection with con handle 0x0004 6966 addr[5] = 0x04; 6967 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6968 conn->con_handle = addr[5]; 6969 conn->role = HCI_ROLE_SLAVE; 6970 conn->state = OPEN; 6971 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6972 6973 // setup ready LE ACL connection with con handle 0x005 and public address 6974 addr[5] = 0x05; 6975 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6976 conn->con_handle = addr[5]; 6977 conn->role = HCI_ROLE_SLAVE; 6978 conn->state = OPEN; 6979 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6980 conn->sm_connection.sm_connection_encrypted = 1; 6981 } 6982 6983 void hci_free_connections_fuzz(void){ 6984 btstack_linked_list_iterator_t it; 6985 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6986 while (btstack_linked_list_iterator_has_next(&it)){ 6987 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6988 btstack_linked_list_iterator_remove(&it); 6989 btstack_memory_hci_connection_free(con); 6990 } 6991 } 6992 void hci_simulate_working_fuzz(void){ 6993 hci_init_done(); 6994 hci_stack->num_cmd_packets = 255; 6995 } 6996 #endif 6997