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 // assumption: hci_can_send_command_packet_now() == true 1427 static void hci_initializing_run(void){ 1428 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1429 switch (hci_stack->substate){ 1430 case HCI_INIT_SEND_RESET: 1431 hci_state_reset(); 1432 1433 #ifndef HAVE_HOST_CONTROLLER_API 1434 // prepare reset if command complete not received in 100ms 1435 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1436 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1437 btstack_run_loop_add_timer(&hci_stack->timeout); 1438 #endif 1439 // send command 1440 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1441 hci_send_cmd(&hci_reset); 1442 break; 1443 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1444 hci_send_cmd(&hci_read_local_version_information); 1445 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1446 break; 1447 case HCI_INIT_SEND_READ_LOCAL_NAME: 1448 hci_send_cmd(&hci_read_local_name); 1449 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1450 break; 1451 1452 #ifndef HAVE_HOST_CONTROLLER_API 1453 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1454 hci_state_reset(); 1455 // prepare reset if command complete not received in 100ms 1456 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1457 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1458 btstack_run_loop_add_timer(&hci_stack->timeout); 1459 // send command 1460 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1461 hci_send_cmd(&hci_reset); 1462 break; 1463 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1464 hci_state_reset(); 1465 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1466 hci_send_cmd(&hci_reset); 1467 break; 1468 case HCI_INIT_SEND_BAUD_CHANGE: { 1469 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1470 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1471 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1472 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1473 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1474 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1475 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1476 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1477 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1478 btstack_run_loop_add_timer(&hci_stack->timeout); 1479 } 1480 break; 1481 } 1482 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1483 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1484 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1485 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1486 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1487 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1488 break; 1489 } 1490 case HCI_INIT_CUSTOM_INIT: 1491 // Custom initialization 1492 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1493 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1494 bool send_cmd = false; 1495 switch (hci_stack->chipset_result){ 1496 case BTSTACK_CHIPSET_VALID_COMMAND: 1497 send_cmd = true; 1498 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1499 break; 1500 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1501 send_cmd = true; 1502 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1503 log_info("CSR Warm Boot"); 1504 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1505 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1506 btstack_run_loop_add_timer(&hci_stack->timeout); 1507 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1508 && hci_stack->config 1509 && hci_stack->chipset 1510 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1511 && hci_stack->hci_transport->set_baudrate 1512 && hci_transport_uart_get_main_baud_rate()){ 1513 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1514 } else { 1515 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1516 } 1517 break; 1518 default: 1519 break; 1520 } 1521 1522 if (send_cmd){ 1523 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1524 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1525 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1526 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1527 break; 1528 } 1529 log_info("Init script done"); 1530 1531 // Init script download on Broadcom chipsets causes: 1532 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1533 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1534 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1535 1536 // - baud rate to reset, restore UART baud rate if needed 1537 int need_baud_change = hci_stack->config 1538 && hci_stack->chipset 1539 && hci_stack->chipset->set_baudrate_command 1540 && hci_stack->hci_transport->set_baudrate 1541 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1542 if (need_baud_change) { 1543 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1544 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1545 hci_stack->hci_transport->set_baudrate(baud_rate); 1546 } 1547 1548 uint16_t bcm_delay_ms = 300; 1549 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1550 // -> Work around: wait here. 1551 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1552 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1553 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1554 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1555 btstack_run_loop_add_timer(&hci_stack->timeout); 1556 break; 1557 } 1558 } 1559 // otherwise continue 1560 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1561 hci_send_cmd(&hci_read_local_supported_commands); 1562 break; 1563 case HCI_INIT_SET_BD_ADDR: 1564 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1565 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1566 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1567 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1568 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1569 break; 1570 #endif 1571 1572 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1573 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1574 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1575 hci_send_cmd(&hci_read_local_supported_commands); 1576 break; 1577 case HCI_INIT_READ_BD_ADDR: 1578 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1579 hci_send_cmd(&hci_read_bd_addr); 1580 break; 1581 case HCI_INIT_READ_BUFFER_SIZE: 1582 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1583 hci_send_cmd(&hci_read_buffer_size); 1584 break; 1585 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1586 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1587 hci_send_cmd(&hci_read_local_supported_features); 1588 break; 1589 1590 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1591 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1592 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1593 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1594 break; 1595 case HCI_INIT_HOST_BUFFER_SIZE: 1596 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1597 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1598 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1599 break; 1600 #endif 1601 1602 case HCI_INIT_SET_EVENT_MASK: 1603 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1604 if (hci_le_supported()){ 1605 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1606 } else { 1607 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1608 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1609 } 1610 break; 1611 1612 #ifdef ENABLE_CLASSIC 1613 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1614 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1615 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1616 break; 1617 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1618 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1619 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1620 break; 1621 case HCI_INIT_WRITE_INQUIRY_MODE: 1622 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1623 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1624 break; 1625 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1626 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1627 hci_stack->secure_connections_active = true; 1628 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1629 break; 1630 // only sent if ENABLE_SCO_OVER_HCI is defined 1631 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1632 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1633 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1634 break; 1635 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1636 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1637 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1638 break; 1639 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1640 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1641 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1642 #ifdef ENABLE_SCO_OVER_HCI 1643 log_info("BCM: Route SCO data via HCI transport"); 1644 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1645 #endif 1646 #ifdef ENABLE_SCO_OVER_PCM 1647 log_info("BCM: Route SCO data via PCM interface"); 1648 #ifdef ENABLE_BCM_PCM_WBS 1649 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1650 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1651 #else 1652 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1653 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1654 #endif 1655 #endif 1656 break; 1657 #ifdef ENABLE_SCO_OVER_PCM 1658 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1659 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1660 log_info("BCM: Config PCM interface for I2S"); 1661 #ifdef ENABLE_BCM_PCM_WBS 1662 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1663 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1664 #else 1665 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1666 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1667 #endif 1668 break; 1669 #endif 1670 #endif 1671 1672 #ifdef ENABLE_BLE 1673 // LE INIT 1674 case HCI_INIT_LE_READ_BUFFER_SIZE: 1675 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1676 hci_send_cmd(&hci_le_read_buffer_size); 1677 break; 1678 case HCI_INIT_LE_SET_EVENT_MASK: 1679 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1680 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1681 break; 1682 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1683 // LE Supported Host = 1, Simultaneous Host = 0 1684 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1685 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1686 break; 1687 #endif 1688 1689 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1690 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1691 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1692 hci_send_cmd(&hci_le_read_maximum_data_length); 1693 break; 1694 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1695 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1696 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1697 break; 1698 #endif 1699 1700 #ifdef ENABLE_LE_CENTRAL 1701 case HCI_INIT_READ_WHITE_LIST_SIZE: 1702 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1703 hci_send_cmd(&hci_le_read_white_list_size); 1704 break; 1705 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1706 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1707 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); 1708 break; 1709 #endif 1710 default: 1711 return; 1712 } 1713 } 1714 1715 static void hci_init_done(void){ 1716 // init sequence complete, check if GAP Tasks are completed 1717 if (hci_stack->gap_tasks != 0) { 1718 hci_run_gap_tasks_classic(); 1719 return; 1720 } 1721 1722 // done. tell the app 1723 log_info("hci_init_done -> HCI_STATE_WORKING"); 1724 hci_stack->state = HCI_STATE_WORKING; 1725 hci_emit_state(); 1726 hci_run(); 1727 } 1728 1729 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1730 bool command_completed = false; 1731 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1732 uint16_t opcode = little_endian_read_16(packet,3); 1733 if (opcode == hci_stack->last_cmd_opcode){ 1734 command_completed = true; 1735 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1736 } else { 1737 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1738 } 1739 } 1740 1741 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1742 uint8_t status = packet[2]; 1743 uint16_t opcode = little_endian_read_16(packet,4); 1744 if (opcode == hci_stack->last_cmd_opcode){ 1745 if (status){ 1746 command_completed = true; 1747 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1748 } else { 1749 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1750 } 1751 } else { 1752 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1753 } 1754 } 1755 #ifndef HAVE_HOST_CONTROLLER_API 1756 // Vendor == CSR 1757 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1758 // TODO: track actual command 1759 command_completed = true; 1760 } 1761 1762 // Vendor == Toshiba 1763 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1764 // TODO: track actual command 1765 command_completed = true; 1766 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1767 hci_stack->num_cmd_packets = 1; 1768 } 1769 #endif 1770 1771 return command_completed; 1772 } 1773 1774 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1775 1776 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1777 1778 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1779 1780 #ifndef HAVE_HOST_CONTROLLER_API 1781 1782 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1783 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1784 // 1785 // HCI Reset 1786 // Timeout 100 ms 1787 // HCI Reset 1788 // Command Complete Reset 1789 // HCI Read Local Version Information 1790 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1791 // hang... 1792 // 1793 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1794 if (!command_completed 1795 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1796 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1797 1798 uint16_t opcode = little_endian_read_16(packet,3); 1799 if (opcode == hci_reset.opcode){ 1800 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1801 return; 1802 } 1803 } 1804 1805 // CSR & H5 1806 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1807 if (!command_completed 1808 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1809 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1810 1811 uint16_t opcode = little_endian_read_16(packet,3); 1812 if (opcode == hci_reset.opcode){ 1813 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1814 return; 1815 } 1816 } 1817 1818 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1819 // fix: Correct substate and behave as command below 1820 if (command_completed){ 1821 switch (hci_stack->substate){ 1822 case HCI_INIT_SEND_RESET: 1823 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1824 break; 1825 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1826 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1827 break; 1828 default: 1829 break; 1830 } 1831 } 1832 1833 #endif 1834 1835 if (!command_completed) return; 1836 1837 bool need_baud_change = false; 1838 bool need_addr_change = false; 1839 1840 #ifndef HAVE_HOST_CONTROLLER_API 1841 need_baud_change = hci_stack->config 1842 && hci_stack->chipset 1843 && hci_stack->chipset->set_baudrate_command 1844 && hci_stack->hci_transport->set_baudrate 1845 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1846 1847 need_addr_change = hci_stack->custom_bd_addr_set 1848 && hci_stack->chipset 1849 && hci_stack->chipset->set_bd_addr_command; 1850 #endif 1851 1852 switch(hci_stack->substate){ 1853 1854 #ifndef HAVE_HOST_CONTROLLER_API 1855 case HCI_INIT_SEND_RESET: 1856 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1857 // fix: just correct substate and behave as command below 1858 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1859 btstack_run_loop_remove_timer(&hci_stack->timeout); 1860 break; 1861 case HCI_INIT_W4_SEND_RESET: 1862 btstack_run_loop_remove_timer(&hci_stack->timeout); 1863 break; 1864 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1865 log_info("Received local name, need baud change %d", (int) need_baud_change); 1866 if (need_baud_change){ 1867 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1868 return; 1869 } 1870 // skip baud change 1871 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1872 return; 1873 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1874 // for STLC2500D, baud rate change already happened. 1875 // for others, baud rate gets changed now 1876 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1877 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1878 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1879 hci_stack->hci_transport->set_baudrate(baud_rate); 1880 } 1881 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1882 return; 1883 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1884 btstack_run_loop_remove_timer(&hci_stack->timeout); 1885 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1886 return; 1887 case HCI_INIT_W4_CUSTOM_INIT: 1888 // repeat custom init 1889 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1890 return; 1891 #else 1892 case HCI_INIT_W4_SEND_RESET: 1893 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1894 return ; 1895 #endif 1896 1897 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1898 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1899 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1900 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1901 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1902 return; 1903 } 1904 if (need_addr_change){ 1905 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1906 return; 1907 } 1908 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1909 return; 1910 #ifndef HAVE_HOST_CONTROLLER_API 1911 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1912 if (need_baud_change){ 1913 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1914 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1915 hci_stack->hci_transport->set_baudrate(baud_rate); 1916 } 1917 if (need_addr_change){ 1918 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1919 return; 1920 } 1921 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1922 return; 1923 case HCI_INIT_W4_SET_BD_ADDR: 1924 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1925 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1926 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1927 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1928 return; 1929 } 1930 // skipping st warm boot 1931 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1932 return; 1933 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1934 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1935 return; 1936 #endif 1937 case HCI_INIT_W4_READ_BD_ADDR: 1938 // only read buffer size if supported 1939 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1940 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1941 return; 1942 } 1943 // skipping read buffer size 1944 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1945 return; 1946 case HCI_INIT_W4_SET_EVENT_MASK: 1947 // skip Classic init commands for LE only chipsets 1948 if (!hci_classic_supported()){ 1949 #ifdef ENABLE_BLE 1950 if (hci_le_supported()){ 1951 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1952 return; 1953 } 1954 #endif 1955 log_error("Neither BR/EDR nor LE supported"); 1956 hci_init_done(); 1957 return; 1958 } 1959 if (!gap_ssp_supported()){ 1960 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1961 return; 1962 } 1963 break; 1964 #ifdef ENABLE_BLE 1965 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1966 // skip write le host if not supported (e.g. on LE only EM9301) 1967 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1968 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1969 return; 1970 1971 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1972 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1973 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1974 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1975 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1976 return; 1977 } 1978 // explicit fall through to reduce repetitions 1979 1980 #ifdef ENABLE_LE_CENTRAL 1981 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1982 #else 1983 hci_init_done(); 1984 #endif 1985 return; 1986 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1987 1988 #endif /* ENABLE_BLE */ 1989 1990 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1991 // skip write secure connections host support if not supported or disabled 1992 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1993 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1994 return; 1995 } 1996 break; 1997 1998 #ifdef ENABLE_SCO_OVER_HCI 1999 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2000 // skip write synchronous flow control if not supported 2001 if (hci_stack->local_supported_commands[0] & 0x04) break; 2002 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2003 2004 /* fall through */ 2005 2006 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2007 // skip write default erroneous data reporting if not supported 2008 if (hci_stack->local_supported_commands[0] & 0x08) break; 2009 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2010 2011 /* fall through */ 2012 2013 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2014 // skip bcm set sco pcm config on non-Broadcom chipsets 2015 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 2016 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2017 2018 /* fall through */ 2019 2020 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 2021 if (!hci_le_supported()){ 2022 // SKIP LE init for Classic only configuration 2023 hci_init_done(); 2024 return; 2025 } 2026 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2027 break; 2028 2029 #else /* !ENABLE_SCO_OVER_HCI */ 2030 2031 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 2032 #ifdef ENABLE_SCO_OVER_PCM 2033 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 2034 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 2035 return; 2036 } 2037 #endif 2038 /* fall through */ 2039 2040 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2041 #ifdef ENABLE_BLE 2042 if (hci_le_supported()){ 2043 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2044 return; 2045 } 2046 #endif 2047 // SKIP LE init for Classic only configuration 2048 hci_init_done(); 2049 return; 2050 #endif /* ENABLE_SCO_OVER_HCI */ 2051 2052 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2053 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2054 // Response to command before init done state -> init done 2055 case (HCI_INIT_DONE-1): 2056 hci_init_done(); 2057 return; 2058 #endif 2059 2060 default: 2061 break; 2062 } 2063 hci_initializing_next_state(); 2064 } 2065 2066 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2067 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2068 bd_addr_t bd_address; 2069 (void)memcpy(&bd_address, conn->address, 6); 2070 2071 #ifdef ENABLE_CLASSIC 2072 // cache needed data 2073 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2074 #endif 2075 2076 // connection failed, remove entry 2077 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2078 btstack_memory_hci_connection_free( conn ); 2079 2080 #ifdef ENABLE_CLASSIC 2081 // notify client if dedicated bonding 2082 if (notify_dedicated_bonding_failed){ 2083 log_info("hci notify_dedicated_bonding_failed"); 2084 hci_emit_dedicated_bonding_result(bd_address, status); 2085 } 2086 2087 // if authentication error, also delete link key 2088 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2089 gap_drop_link_key_for_bd_addr(bd_address); 2090 } 2091 #else 2092 UNUSED(status); 2093 #endif 2094 } 2095 2096 #ifdef ENABLE_CLASSIC 2097 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2098 // SSP Controller 2099 if (features[6] & (1 << 3)){ 2100 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2101 } 2102 // eSCO 2103 if (features[3] & (1<<7)){ 2104 conn->remote_supported_features[0] |= 1; 2105 } 2106 // Extended features 2107 if (features[7] & (1<<7)){ 2108 conn->remote_supported_features[0] |= 2; 2109 } 2110 } 2111 2112 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2113 // SSP Host 2114 if (features[0] & (1 << 0)){ 2115 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2116 } 2117 // SC Host 2118 if (features[0] & (1 << 3)){ 2119 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2120 } 2121 } 2122 2123 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2124 // SC Controller 2125 if (features[1] & (1 << 0)){ 2126 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2127 } 2128 } 2129 2130 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2131 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2132 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2133 if (conn->bonding_flags & BONDING_DEDICATED){ 2134 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2135 } 2136 } 2137 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2138 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2139 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2140 } 2141 2142 #endif 2143 2144 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2145 // handle BT initialization 2146 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2147 hci_initializing_event_handler(packet, size); 2148 } 2149 2150 // help with BT sleep 2151 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2152 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2153 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2154 hci_initializing_next_state(); 2155 } 2156 } 2157 2158 #ifdef ENABLE_CLASSIC 2159 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2160 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2161 conn->encryption_key_size = encryption_key_size; 2162 2163 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2164 conn->requested_security_level = LEVEL_0; 2165 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2166 return; 2167 } 2168 2169 // Request Authentication if not already done 2170 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2171 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2172 } 2173 #endif 2174 2175 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2176 UNUSED(size); 2177 2178 uint16_t manufacturer; 2179 #ifdef ENABLE_CLASSIC 2180 hci_con_handle_t handle; 2181 hci_connection_t * conn; 2182 uint8_t status; 2183 #endif 2184 // get num cmd packets - limit to 1 to reduce complexity 2185 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2186 2187 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2188 switch (opcode){ 2189 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2190 if (packet[5]) break; 2191 // terminate, name 248 chars 2192 packet[6+248] = 0; 2193 log_info("local name: %s", &packet[6]); 2194 break; 2195 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2196 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2197 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2198 uint16_t acl_len = little_endian_read_16(packet, 6); 2199 uint16_t sco_len = packet[8]; 2200 2201 // determine usable ACL/SCO payload size 2202 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2203 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2204 2205 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2206 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2207 2208 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2209 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2210 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2211 } 2212 break; 2213 case HCI_OPCODE_HCI_READ_RSSI: 2214 if (packet[5] == ERROR_CODE_SUCCESS){ 2215 uint8_t event[5]; 2216 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2217 event[1] = 3; 2218 (void)memcpy(&event[2], &packet[6], 3); 2219 hci_emit_event(event, sizeof(event), 1); 2220 } 2221 break; 2222 #ifdef ENABLE_BLE 2223 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2224 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2225 hci_stack->le_acl_packets_total_num = packet[8]; 2226 // determine usable ACL payload size 2227 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2228 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2229 } 2230 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2231 break; 2232 #endif 2233 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2234 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2235 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2236 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2237 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); 2238 break; 2239 #endif 2240 #ifdef ENABLE_LE_CENTRAL 2241 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2242 hci_stack->le_whitelist_capacity = packet[6]; 2243 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2244 break; 2245 #endif 2246 case HCI_OPCODE_HCI_READ_BD_ADDR: 2247 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2248 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)); 2249 #ifdef ENABLE_CLASSIC 2250 if (hci_stack->link_key_db){ 2251 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2252 } 2253 #endif 2254 break; 2255 #ifdef ENABLE_CLASSIC 2256 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2257 hci_emit_discoverable_enabled(hci_stack->discoverable); 2258 break; 2259 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2260 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2261 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2262 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2263 hci_emit_event(event, sizeof(event), 1); 2264 } 2265 break; 2266 #endif 2267 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2268 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2269 2270 #ifdef ENABLE_CLASSIC 2271 // determine usable ACL packet types based on host buffer size and supported features 2272 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2273 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2274 #endif 2275 // Classic/LE 2276 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2277 break; 2278 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2279 manufacturer = little_endian_read_16(packet, 10); 2280 // map Cypress to Broadcom 2281 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2282 log_info("Treat Cypress as Broadcom"); 2283 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2284 little_endian_store_16(packet, 10, manufacturer); 2285 } 2286 hci_stack->manufacturer = manufacturer; 2287 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2288 break; 2289 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2290 hci_stack->local_supported_commands[0] = 2291 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2292 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2293 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2294 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2295 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2296 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2297 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2298 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2299 hci_stack->local_supported_commands[1] = 2300 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2301 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2302 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2303 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2304 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2305 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2306 break; 2307 #ifdef ENABLE_CLASSIC 2308 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2309 if (packet[5]) return; 2310 hci_stack->synchronous_flow_control_enabled = 1; 2311 break; 2312 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2313 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2314 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2315 conn = hci_connection_for_handle(handle); 2316 if (conn != NULL) { 2317 uint8_t key_size = 0; 2318 if (status == 0){ 2319 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2320 log_info("Handle %04x key Size: %u", handle, key_size); 2321 } else { 2322 key_size = 1; 2323 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2324 } 2325 hci_handle_read_encryption_key_size_complete(conn, key_size); 2326 } 2327 break; 2328 // assert pairing complete event is emitted. 2329 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2330 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2331 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2332 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2333 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2334 // lookup connection by gap pairing addr 2335 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2336 if (conn == NULL) break; 2337 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2338 break; 2339 2340 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2341 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2342 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2343 uint8_t event[67]; 2344 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2345 event[1] = 65; 2346 (void)memset(&event[2], 0, 65); 2347 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2348 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2349 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2350 event[2] = 3; 2351 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2352 } else { 2353 event[2] = 1; 2354 } 2355 } 2356 hci_emit_event(event, sizeof(event), 0); 2357 break; 2358 } 2359 2360 // note: only needed if user does not provide OOB data 2361 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2362 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2363 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2364 if (conn == NULL) break; 2365 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2366 break; 2367 #endif 2368 #endif 2369 default: 2370 break; 2371 } 2372 } 2373 2374 #ifdef ENABLE_BLE 2375 static void event_handle_le_connection_complete(const uint8_t * packet){ 2376 bd_addr_t addr; 2377 bd_addr_type_t addr_type; 2378 hci_connection_t * conn; 2379 2380 // Connection management 2381 reverse_bd_addr(&packet[8], addr); 2382 addr_type = (bd_addr_type_t)packet[7]; 2383 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2384 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2385 2386 #ifdef ENABLE_LE_CENTRAL 2387 // handle error: error is reported only to the initiator -> outgoing connection 2388 if (packet[3]){ 2389 2390 // handle cancelled outgoing connection 2391 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2392 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2393 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2394 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2395 // reset state 2396 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2397 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2398 // get outgoing connection conn struct for direct connect 2399 conn = gap_get_outgoing_connection(); 2400 } 2401 2402 // outgoing le connection establishment is done 2403 if (conn){ 2404 // remove entry 2405 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2406 btstack_memory_hci_connection_free( conn ); 2407 } 2408 return; 2409 } 2410 #endif 2411 2412 // on success, both hosts receive connection complete event 2413 if (packet[6] == HCI_ROLE_MASTER){ 2414 #ifdef ENABLE_LE_CENTRAL 2415 // if we're master on an le connection, it was an outgoing connection and we're done with it 2416 // note: no hci_connection_t object exists yet for connect with whitelist 2417 if (hci_is_le_connection_type(addr_type)){ 2418 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2419 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2420 } 2421 #endif 2422 } else { 2423 #ifdef ENABLE_LE_PERIPHERAL 2424 // if we're slave, it was an incoming connection, advertisements have stopped 2425 hci_stack->le_advertisements_active = false; 2426 #endif 2427 } 2428 2429 // LE connections are auto-accepted, so just create a connection if there isn't one already 2430 if (!conn){ 2431 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2432 } 2433 2434 // no memory, sorry. 2435 if (!conn){ 2436 return; 2437 } 2438 2439 conn->state = OPEN; 2440 conn->role = packet[6]; 2441 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2442 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2443 2444 #ifdef ENABLE_LE_PERIPHERAL 2445 if (packet[6] == HCI_ROLE_SLAVE){ 2446 hci_update_advertisements_enabled_for_current_roles(); 2447 } 2448 #endif 2449 2450 // init unenhanced att bearer mtu 2451 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2452 conn->att_connection.mtu_exchanged = false; 2453 2454 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2455 2456 // restart timer 2457 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2458 // btstack_run_loop_add_timer(&conn->timeout); 2459 2460 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2461 2462 hci_emit_nr_connections_changed(); 2463 } 2464 #endif 2465 2466 #ifdef ENABLE_CLASSIC 2467 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){ 2468 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2469 // LEVEL_4 is tested by l2cap 2470 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2471 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2472 if (level >= LEVEL_3){ 2473 // MITM not possible without keyboard or display 2474 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2475 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2476 2477 // MITM possible if one side has keyboard and the other has keyboard or display 2478 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2479 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2480 2481 // MITM not possible if one side has only display and other side has no keyboard 2482 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2483 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2484 } 2485 // LEVEL 2 requires SSP, which is a given 2486 return true; 2487 } 2488 2489 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2490 uint16_t i; 2491 for (i=0; i < size ; i++){ 2492 if (data[i] != 0) { 2493 return false; 2494 } 2495 } 2496 return true; 2497 } 2498 2499 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2500 // get requested security level 2501 gap_security_level_t requested_security_level = conn->requested_security_level; 2502 if (hci_stack->gap_secure_connections_only_mode){ 2503 requested_security_level = LEVEL_4; 2504 } 2505 2506 // assess security: LEVEL 4 requires SC 2507 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2508 if ((requested_security_level == LEVEL_4) && 2509 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2510 !hci_remote_sc_enabled(conn)){ 2511 log_info("Level 4 required, but SC not supported -> abort"); 2512 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2513 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2514 return; 2515 } 2516 2517 // assess security based on io capabilities 2518 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2519 // responder: fully validate io caps of both sides as well as OOB data 2520 bool security_possible = false; 2521 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2522 2523 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2524 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2525 // so we merge the OOB data availability 2526 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2527 if (conn->classic_oob_c_192 != NULL){ 2528 have_oob_data |= 1; 2529 } 2530 if (conn->classic_oob_c_256 != NULL){ 2531 have_oob_data |= 2; 2532 } 2533 // for up to Level 3, either P-192 as well as P-256 will do 2534 // 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 2535 // if remote does not SC, we should not receive P-256 data either 2536 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2537 security_possible = true; 2538 } 2539 // for Level 4, P-256 is needed 2540 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2541 security_possible = true; 2542 } 2543 #endif 2544 2545 if (security_possible == false){ 2546 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2547 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2548 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2549 return; 2550 } 2551 } else { 2552 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2553 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2554 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2555 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2556 log_info("Level 3+ required, but no input/output -> abort"); 2557 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2558 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2559 return; 2560 } 2561 #endif 2562 #endif 2563 } 2564 2565 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2566 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2567 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2568 } else { 2569 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2570 } 2571 #endif 2572 } 2573 2574 #endif 2575 2576 static void event_handler(uint8_t *packet, uint16_t size){ 2577 2578 uint16_t event_length = packet[1]; 2579 2580 // assert packet is complete 2581 if (size != (event_length + 2u)){ 2582 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2583 return; 2584 } 2585 2586 bd_addr_type_t addr_type; 2587 hci_con_handle_t handle; 2588 hci_connection_t * conn; 2589 int i; 2590 int create_connection_cmd; 2591 2592 #ifdef ENABLE_CLASSIC 2593 hci_link_type_t link_type; 2594 bd_addr_t addr; 2595 #endif 2596 2597 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2598 2599 switch (hci_event_packet_get_type(packet)) { 2600 2601 case HCI_EVENT_COMMAND_COMPLETE: 2602 handle_command_complete_event(packet, size); 2603 break; 2604 2605 case HCI_EVENT_COMMAND_STATUS: 2606 // get num cmd packets - limit to 1 to reduce complexity 2607 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2608 2609 // check command status to detected failed outgoing connections 2610 create_connection_cmd = 0; 2611 #ifdef ENABLE_CLASSIC 2612 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2613 create_connection_cmd = 1; 2614 } 2615 #endif 2616 #ifdef ENABLE_LE_CENTRAL 2617 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2618 create_connection_cmd = 1; 2619 } 2620 #endif 2621 if (create_connection_cmd) { 2622 uint8_t status = hci_event_command_status_get_status(packet); 2623 addr_type = hci_stack->outgoing_addr_type; 2624 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2625 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); 2626 2627 // reset outgoing address info 2628 memset(hci_stack->outgoing_addr, 0, 6); 2629 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2630 2631 // on error 2632 if (status != ERROR_CODE_SUCCESS){ 2633 #ifdef ENABLE_LE_CENTRAL 2634 if (hci_is_le_connection_type(addr_type)){ 2635 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2636 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2637 } 2638 #endif 2639 // error => outgoing connection failed 2640 if (conn != NULL){ 2641 hci_handle_connection_failed(conn, status); 2642 } 2643 } 2644 } 2645 2646 #ifdef ENABLE_CLASSIC 2647 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2648 uint8_t status = hci_event_command_status_get_status(packet); 2649 log_info("command status (inquiry), status %x", status); 2650 if (status == ERROR_CODE_SUCCESS) { 2651 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2652 } else { 2653 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2654 } 2655 } 2656 #endif 2657 break; 2658 2659 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2660 if (size < 3) return; 2661 uint16_t num_handles = packet[2]; 2662 if (size != (3u + num_handles * 4u)) return; 2663 uint16_t offset = 3; 2664 for (i=0; i<num_handles;i++){ 2665 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2666 offset += 2u; 2667 uint16_t num_packets = little_endian_read_16(packet, offset); 2668 offset += 2u; 2669 2670 conn = hci_connection_for_handle(handle); 2671 if (!conn){ 2672 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2673 continue; 2674 } 2675 2676 if (conn->num_packets_sent >= num_packets){ 2677 conn->num_packets_sent -= num_packets; 2678 } else { 2679 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2680 conn->num_packets_sent = 0; 2681 } 2682 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2683 2684 #ifdef ENABLE_CLASSIC 2685 // For SCO, we do the can_send_now_check here 2686 hci_notify_if_sco_can_send_now(); 2687 #endif 2688 } 2689 break; 2690 } 2691 2692 #ifdef ENABLE_CLASSIC 2693 case HCI_EVENT_INQUIRY_COMPLETE: 2694 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2695 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2696 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2697 hci_emit_event(event, sizeof(event), 1); 2698 } 2699 break; 2700 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2701 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2702 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2703 } 2704 break; 2705 case HCI_EVENT_CONNECTION_REQUEST: 2706 reverse_bd_addr(&packet[2], addr); 2707 link_type = (hci_link_type_t) packet[11]; 2708 2709 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2710 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2711 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2712 bd_addr_copy(hci_stack->decline_addr, addr); 2713 break; 2714 } 2715 2716 if (hci_stack->gap_classic_accept_callback != NULL){ 2717 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2718 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2719 bd_addr_copy(hci_stack->decline_addr, addr); 2720 break; 2721 } 2722 } 2723 2724 // TODO: eval COD 8-10 2725 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2726 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2727 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2728 if (!conn) { 2729 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2730 } 2731 if (!conn) { 2732 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2733 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2734 bd_addr_copy(hci_stack->decline_addr, addr); 2735 break; 2736 } 2737 conn->role = HCI_ROLE_SLAVE; 2738 conn->state = RECEIVED_CONNECTION_REQUEST; 2739 // store info about eSCO 2740 if (link_type == HCI_LINK_TYPE_ESCO){ 2741 conn->remote_supported_features[0] |= 1; 2742 } 2743 hci_run(); 2744 break; 2745 2746 case HCI_EVENT_CONNECTION_COMPLETE: 2747 // Connection management 2748 reverse_bd_addr(&packet[5], addr); 2749 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2750 addr_type = BD_ADDR_TYPE_ACL; 2751 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2752 if (conn) { 2753 if (!packet[2]){ 2754 conn->state = OPEN; 2755 conn->con_handle = little_endian_read_16(packet, 3); 2756 2757 // queue get remote feature 2758 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2759 2760 // queue set supervision timeout if we're master 2761 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2762 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2763 } 2764 2765 // restart timer 2766 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2767 btstack_run_loop_add_timer(&conn->timeout); 2768 2769 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2770 2771 hci_emit_nr_connections_changed(); 2772 } else { 2773 // connection failed 2774 hci_handle_connection_failed(conn, packet[2]); 2775 } 2776 } 2777 break; 2778 2779 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2780 reverse_bd_addr(&packet[5], addr); 2781 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2782 if (packet[2]){ 2783 // connection failed 2784 break; 2785 } 2786 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2787 if (!conn) { 2788 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2789 } 2790 if (!conn) { 2791 break; 2792 } 2793 conn->state = OPEN; 2794 conn->con_handle = little_endian_read_16(packet, 3); 2795 2796 #ifdef ENABLE_SCO_OVER_HCI 2797 // update SCO 2798 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2799 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2800 } 2801 // trigger can send now 2802 if (hci_have_usb_transport()){ 2803 hci_stack->sco_can_send_now = true; 2804 } 2805 #endif 2806 #ifdef HAVE_SCO_TRANSPORT 2807 // configure sco transport 2808 if (hci_stack->sco_transport != NULL){ 2809 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2810 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2811 } 2812 #endif 2813 break; 2814 2815 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2816 handle = little_endian_read_16(packet, 3); 2817 conn = hci_connection_for_handle(handle); 2818 if (!conn) break; 2819 if (!packet[2]){ 2820 const uint8_t * features = &packet[5]; 2821 hci_handle_remote_features_page_0(conn, features); 2822 2823 // read extended features if possible 2824 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2825 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2826 break; 2827 } 2828 } 2829 hci_handle_remote_features_received(conn); 2830 break; 2831 2832 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2833 handle = little_endian_read_16(packet, 3); 2834 conn = hci_connection_for_handle(handle); 2835 if (!conn) break; 2836 // status = ok, page = 1 2837 if (!packet[2]) { 2838 uint8_t page_number = packet[5]; 2839 uint8_t maximum_page_number = packet[6]; 2840 const uint8_t * features = &packet[7]; 2841 bool done = false; 2842 switch (page_number){ 2843 case 1: 2844 hci_handle_remote_features_page_1(conn, features); 2845 if (maximum_page_number >= 2){ 2846 // get Secure Connections (Controller) from Page 2 if available 2847 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2848 } else { 2849 // otherwise, assume SC (Controller) == SC (Host) 2850 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2851 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2852 } 2853 done = true; 2854 } 2855 break; 2856 case 2: 2857 hci_handle_remote_features_page_2(conn, features); 2858 done = true; 2859 break; 2860 default: 2861 break; 2862 } 2863 if (!done) break; 2864 } 2865 hci_handle_remote_features_received(conn); 2866 break; 2867 2868 case HCI_EVENT_LINK_KEY_REQUEST: 2869 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2870 hci_event_link_key_request_get_bd_addr(packet, addr); 2871 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2872 if (!conn) break; 2873 2874 // lookup link key in db if not cached 2875 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2876 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2877 } 2878 2879 // response sent by hci_run() 2880 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2881 #endif 2882 break; 2883 2884 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2885 hci_event_link_key_request_get_bd_addr(packet, addr); 2886 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2887 if (!conn) break; 2888 2889 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2890 2891 // CVE-2020-26555: ignore NULL link key 2892 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2893 if (btstack_is_null(&packet[8], 16)) break; 2894 2895 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2896 // Change Connection Encryption keeps link key type 2897 if (link_key_type != CHANGED_COMBINATION_KEY){ 2898 conn->link_key_type = link_key_type; 2899 } 2900 2901 // cache link key. link keys stored in little-endian format for legacy reasons 2902 memcpy(&conn->link_key, &packet[8], 16); 2903 2904 // only store link key: 2905 // - if bondable enabled 2906 if (hci_stack->bondable == false) break; 2907 // - if security level sufficient 2908 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2909 // - for SSP, also check if remote side requested bonding as well 2910 if (conn->link_key_type != COMBINATION_KEY){ 2911 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2912 if (!remote_bonding){ 2913 break; 2914 } 2915 } 2916 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2917 break; 2918 } 2919 2920 case HCI_EVENT_PIN_CODE_REQUEST: 2921 hci_event_pin_code_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_started(conn, false); 2926 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2927 if (!hci_stack->bondable ){ 2928 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2929 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2930 hci_run(); 2931 return; 2932 } 2933 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2934 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2935 log_info("Level 4 required, but SC not supported -> abort"); 2936 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2937 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2938 hci_run(); 2939 return; 2940 } 2941 break; 2942 2943 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2944 hci_event_io_capability_response_get_bd_addr(packet, addr); 2945 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2946 if (!conn) break; 2947 2948 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2949 hci_pairing_started(conn, true); 2950 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2951 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2952 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2953 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2954 #endif 2955 break; 2956 2957 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2958 hci_event_io_capability_response_get_bd_addr(packet, addr); 2959 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2960 if (!conn) break; 2961 2962 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2963 hci_connection_timestamp(conn); 2964 hci_pairing_started(conn, true); 2965 break; 2966 2967 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2968 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2969 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2970 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2971 if (!conn) break; 2972 2973 hci_connection_timestamp(conn); 2974 2975 hci_pairing_started(conn, true); 2976 2977 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2978 break; 2979 #endif 2980 2981 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2982 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2983 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2984 if (!conn) break; 2985 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2986 if (hci_stack->ssp_auto_accept){ 2987 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2988 }; 2989 } else { 2990 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2991 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2992 // don't forward event to app 2993 hci_run(); 2994 return; 2995 } 2996 break; 2997 2998 case HCI_EVENT_USER_PASSKEY_REQUEST: 2999 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3000 if (hci_stack->ssp_auto_accept){ 3001 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3002 }; 3003 break; 3004 3005 case HCI_EVENT_MODE_CHANGE: 3006 handle = hci_event_mode_change_get_handle(packet); 3007 conn = hci_connection_for_handle(handle); 3008 if (!conn) break; 3009 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3010 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3011 break; 3012 #endif 3013 3014 case HCI_EVENT_ENCRYPTION_CHANGE: 3015 handle = hci_event_encryption_change_get_connection_handle(packet); 3016 conn = hci_connection_for_handle(handle); 3017 if (!conn) break; 3018 if (hci_event_encryption_change_get_status(packet) == 0u) { 3019 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3020 if (encryption_enabled){ 3021 if (hci_is_le_connection(conn)){ 3022 // For LE, we accept connection as encrypted 3023 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3024 } 3025 #ifdef ENABLE_CLASSIC 3026 else { 3027 3028 // dedicated bonding: send result and disconnect 3029 if (conn->bonding_flags & BONDING_DEDICATED){ 3030 conn->bonding_flags &= ~BONDING_DEDICATED; 3031 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3032 conn->bonding_status = packet[2]; 3033 break; 3034 } 3035 3036 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3037 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3038 bool connected_uses_aes_ccm = encryption_enabled == 2; 3039 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3040 log_info("SC during pairing, but only E0 now -> abort"); 3041 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3042 break; 3043 } 3044 3045 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3046 if (connected_uses_aes_ccm){ 3047 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3048 } 3049 3050 #ifdef ENABLE_TESTING_SUPPORT 3051 // work around for issue with PTS dongle 3052 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3053 #endif 3054 3055 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3056 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3057 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3058 } else { 3059 // if not, pretend everything is perfect 3060 hci_handle_read_encryption_key_size_complete(conn, 16); 3061 } 3062 } 3063 #endif 3064 } else { 3065 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3066 } 3067 } 3068 3069 break; 3070 3071 #ifdef ENABLE_CLASSIC 3072 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3073 handle = hci_event_authentication_complete_get_connection_handle(packet); 3074 conn = hci_connection_for_handle(handle); 3075 if (!conn) break; 3076 3077 // clear authentication active flag 3078 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3079 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3080 3081 // authenticated only if auth status == 0 3082 if (hci_event_authentication_complete_get_status(packet) == 0){ 3083 // authenticated 3084 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3085 3086 // If not already encrypted, start encryption 3087 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3088 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3089 break; 3090 } 3091 } 3092 3093 // emit updated security level 3094 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3095 break; 3096 3097 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3098 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3099 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3100 if (!conn) break; 3101 3102 // treat successfully paired connection as authenticated 3103 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3104 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3105 } 3106 3107 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3108 break; 3109 #endif 3110 3111 // HCI_EVENT_DISCONNECTION_COMPLETE 3112 // has been split, to first notify stack before shutting connection down 3113 // see end of function, too. 3114 case HCI_EVENT_DISCONNECTION_COMPLETE: 3115 if (packet[2]) break; // status != 0 3116 handle = little_endian_read_16(packet, 3); 3117 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3118 if (hci_stack->acl_fragmentation_total_size > 0u) { 3119 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3120 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3121 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3122 hci_stack->acl_fragmentation_total_size = 0; 3123 hci_stack->acl_fragmentation_pos = 0; 3124 if (release_buffer){ 3125 hci_release_packet_buffer(); 3126 } 3127 } 3128 } 3129 3130 conn = hci_connection_for_handle(handle); 3131 if (!conn) break; 3132 #ifdef ENABLE_CLASSIC 3133 // pairing failed if it was ongoing 3134 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3135 #endif 3136 3137 // emit dedicatd bonding event 3138 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3139 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3140 } 3141 3142 // mark connection for shutdown, stop timers, reset state 3143 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3144 hci_connection_stop_timer(conn); 3145 hci_connection_init(conn); 3146 3147 #ifdef ENABLE_BLE 3148 #ifdef ENABLE_LE_PERIPHERAL 3149 // re-enable advertisements for le connections if active 3150 if (hci_is_le_connection(conn)){ 3151 hci_update_advertisements_enabled_for_current_roles(); 3152 } 3153 #endif 3154 #endif 3155 break; 3156 3157 case HCI_EVENT_HARDWARE_ERROR: 3158 log_error("Hardware Error: 0x%02x", packet[2]); 3159 if (hci_stack->hardware_error_callback){ 3160 (*hci_stack->hardware_error_callback)(packet[2]); 3161 } else { 3162 // if no special requests, just reboot stack 3163 hci_power_control_off(); 3164 hci_power_control_on(); 3165 } 3166 break; 3167 3168 #ifdef ENABLE_CLASSIC 3169 case HCI_EVENT_ROLE_CHANGE: 3170 if (packet[2]) break; // status != 0 3171 reverse_bd_addr(&packet[3], addr); 3172 addr_type = BD_ADDR_TYPE_ACL; 3173 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3174 if (!conn) break; 3175 conn->role = packet[9]; 3176 break; 3177 #endif 3178 3179 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3180 // release packet buffer only for asynchronous transport and if there are not further fragements 3181 if (hci_transport_synchronous()) { 3182 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3183 return; // instead of break: to avoid re-entering hci_run() 3184 } 3185 hci_stack->acl_fragmentation_tx_active = 0; 3186 if (hci_stack->acl_fragmentation_total_size) break; 3187 hci_release_packet_buffer(); 3188 3189 // L2CAP receives this event via the hci_emit_event below 3190 3191 #ifdef ENABLE_CLASSIC 3192 // For SCO, we do the can_send_now_check here 3193 hci_notify_if_sco_can_send_now(); 3194 #endif 3195 break; 3196 3197 #ifdef ENABLE_CLASSIC 3198 case HCI_EVENT_SCO_CAN_SEND_NOW: 3199 // For SCO, we do the can_send_now_check here 3200 hci_stack->sco_can_send_now = true; 3201 hci_notify_if_sco_can_send_now(); 3202 return; 3203 3204 // explode inquriy results for easier consumption 3205 case HCI_EVENT_INQUIRY_RESULT: 3206 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3207 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3208 gap_inquiry_explode(packet, size); 3209 break; 3210 #endif 3211 3212 #ifdef ENABLE_BLE 3213 case HCI_EVENT_LE_META: 3214 switch (packet[2]){ 3215 #ifdef ENABLE_LE_CENTRAL 3216 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3217 // log_info("advertising report received"); 3218 if (!hci_stack->le_scanning_enabled) break; 3219 le_handle_advertisement_report(packet, size); 3220 break; 3221 #endif 3222 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3223 event_handle_le_connection_complete(packet); 3224 break; 3225 3226 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3227 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3228 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3229 conn = hci_connection_for_handle(handle); 3230 if (!conn) break; 3231 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3232 break; 3233 3234 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3235 // connection 3236 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3237 conn = hci_connection_for_handle(handle); 3238 if (conn) { 3239 // read arguments 3240 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3241 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3242 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3243 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3244 3245 // validate against current connection parameter range 3246 le_connection_parameter_range_t existing_range; 3247 gap_get_connection_parameter_range(&existing_range); 3248 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3249 if (update_parameter){ 3250 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3251 conn->le_conn_interval_min = le_conn_interval_min; 3252 conn->le_conn_interval_max = le_conn_interval_max; 3253 conn->le_conn_latency = le_conn_latency; 3254 conn->le_supervision_timeout = le_supervision_timeout; 3255 } else { 3256 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3257 } 3258 } 3259 break; 3260 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3261 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3262 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3263 conn = hci_connection_for_handle(handle); 3264 if (conn) { 3265 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3266 } 3267 break; 3268 #endif 3269 default: 3270 break; 3271 } 3272 break; 3273 #endif 3274 case HCI_EVENT_VENDOR_SPECIFIC: 3275 // Vendor specific commands often create vendor specific event instead of num completed packets 3276 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3277 switch (hci_stack->manufacturer){ 3278 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3279 hci_stack->num_cmd_packets = 1; 3280 break; 3281 default: 3282 break; 3283 } 3284 break; 3285 default: 3286 break; 3287 } 3288 3289 handle_event_for_current_stack_state(packet, size); 3290 3291 // notify upper stack 3292 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3293 3294 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3295 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3296 handle = little_endian_read_16(packet, 3); 3297 hci_connection_t * aConn = hci_connection_for_handle(handle); 3298 // discard connection if app did not trigger a reconnect in the event handler 3299 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3300 hci_shutdown_connection(aConn); 3301 } 3302 } 3303 3304 // execute main loop 3305 hci_run(); 3306 } 3307 3308 #ifdef ENABLE_CLASSIC 3309 3310 #ifdef ENABLE_SCO_OVER_HCI 3311 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3312 static void sco_schedule_tx(hci_connection_t * conn); 3313 3314 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3315 log_debug("SCO TX Timeout"); 3316 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3317 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3318 if (!conn) return; 3319 3320 // trigger send 3321 conn->sco_tx_ready = 1; 3322 // extra packet if CVSD but SCO buffer is too short 3323 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3324 conn->sco_tx_ready++; 3325 } 3326 hci_notify_if_sco_can_send_now(); 3327 } 3328 3329 3330 #define SCO_TX_AFTER_RX_MS (6) 3331 3332 static void sco_schedule_tx(hci_connection_t * conn){ 3333 3334 uint32_t now = btstack_run_loop_get_time_ms(); 3335 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3336 int time_delta_ms = sco_tx_ms - now; 3337 3338 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3339 3340 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3341 btstack_run_loop_remove_timer(timer); 3342 btstack_run_loop_set_timer(timer, time_delta_ms); 3343 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3344 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3345 btstack_run_loop_add_timer(timer); 3346 } 3347 #endif 3348 3349 static void sco_handler(uint8_t * packet, uint16_t size){ 3350 // lookup connection struct 3351 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3352 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3353 if (!conn) return; 3354 3355 #ifdef ENABLE_SCO_OVER_HCI 3356 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3357 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3358 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3359 packet[2] = 0x3c; 3360 memmove(&packet[3], &packet[23], 63); 3361 size = 63; 3362 } 3363 } 3364 3365 if (hci_have_usb_transport()){ 3366 // Nothing to do 3367 } else { 3368 // 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); 3369 if (hci_stack->synchronous_flow_control_enabled == 0){ 3370 uint32_t now = btstack_run_loop_get_time_ms(); 3371 3372 if (!conn->sco_rx_valid){ 3373 // ignore first 10 packets 3374 conn->sco_rx_count++; 3375 // log_debug("sco rx count %u", conn->sco_rx_count); 3376 if (conn->sco_rx_count == 10) { 3377 // use first timestamp as is and pretent it just started 3378 conn->sco_rx_ms = now; 3379 conn->sco_rx_valid = 1; 3380 conn->sco_rx_count = 0; 3381 sco_schedule_tx(conn); 3382 } 3383 } else { 3384 // track expected arrival timme 3385 conn->sco_rx_count++; 3386 conn->sco_rx_ms += 7; 3387 int delta = (int32_t) (now - conn->sco_rx_ms); 3388 if (delta > 0){ 3389 conn->sco_rx_ms++; 3390 } 3391 // log_debug("sco rx %u", conn->sco_rx_ms); 3392 sco_schedule_tx(conn); 3393 } 3394 } 3395 } 3396 #endif 3397 3398 // deliver to app 3399 if (hci_stack->sco_packet_handler) { 3400 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3401 } 3402 3403 #ifdef HAVE_SCO_TRANSPORT 3404 // We can send one packet for each received packet 3405 conn->sco_tx_ready++; 3406 hci_notify_if_sco_can_send_now(); 3407 #endif 3408 3409 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3410 conn->num_packets_completed++; 3411 hci_stack->host_completed_packets = 1; 3412 hci_run(); 3413 #endif 3414 } 3415 #endif 3416 3417 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3418 hci_dump_packet(packet_type, 1, packet, size); 3419 switch (packet_type) { 3420 case HCI_EVENT_PACKET: 3421 event_handler(packet, size); 3422 break; 3423 case HCI_ACL_DATA_PACKET: 3424 acl_handler(packet, size); 3425 break; 3426 #ifdef ENABLE_CLASSIC 3427 case HCI_SCO_DATA_PACKET: 3428 sco_handler(packet, size); 3429 break; 3430 #endif 3431 default: 3432 break; 3433 } 3434 } 3435 3436 /** 3437 * @brief Add event packet handler. 3438 */ 3439 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3440 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3441 } 3442 3443 3444 /** Register HCI packet handlers */ 3445 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3446 hci_stack->acl_packet_handler = handler; 3447 } 3448 3449 #ifdef ENABLE_CLASSIC 3450 /** 3451 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3452 */ 3453 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3454 hci_stack->sco_packet_handler = handler; 3455 } 3456 #endif 3457 3458 static void hci_state_reset(void){ 3459 // no connections yet 3460 hci_stack->connections = NULL; 3461 3462 // keep discoverable/connectable as this has been requested by the client(s) 3463 // hci_stack->discoverable = 0; 3464 // hci_stack->connectable = 0; 3465 // hci_stack->bondable = 1; 3466 // hci_stack->own_addr_type = 0; 3467 3468 // buffer is free 3469 hci_stack->hci_packet_buffer_reserved = false; 3470 3471 // no pending cmds 3472 hci_stack->decline_reason = 0; 3473 3474 hci_stack->secure_connections_active = false; 3475 3476 #ifdef ENABLE_CLASSIC 3477 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3478 hci_stack->gap_tasks = 3479 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3480 GAP_TASK_SET_CLASS_OF_DEVICE | 3481 GAP_TASK_SET_LOCAL_NAME | 3482 GAP_TASK_SET_EIR_DATA | 3483 GAP_TASK_WRITE_SCAN_ENABLE; 3484 #endif 3485 3486 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3487 hci_stack->classic_read_local_oob_data = true; 3488 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3489 #endif 3490 3491 // LE 3492 #ifdef ENABLE_BLE 3493 memset(hci_stack->le_random_address, 0, 6); 3494 hci_stack->le_random_address_set = 0; 3495 #endif 3496 #ifdef ENABLE_LE_CENTRAL 3497 hci_stack->le_scanning_active = false; 3498 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3499 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3500 hci_stack->le_whitelist_capacity = 0; 3501 #endif 3502 #ifdef ENABLE_LE_PERIPHERAL 3503 hci_stack->le_advertisements_active = false; 3504 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3505 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3506 } 3507 if (hci_stack->le_advertisements_data != NULL){ 3508 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3509 } 3510 #endif 3511 } 3512 3513 #ifdef ENABLE_CLASSIC 3514 /** 3515 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3516 */ 3517 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3518 // store and open remote device db 3519 hci_stack->link_key_db = link_key_db; 3520 if (hci_stack->link_key_db) { 3521 hci_stack->link_key_db->open(); 3522 } 3523 } 3524 #endif 3525 3526 void hci_init(const hci_transport_t *transport, const void *config){ 3527 3528 #ifdef HAVE_MALLOC 3529 if (!hci_stack) { 3530 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3531 } 3532 #else 3533 hci_stack = &hci_stack_static; 3534 #endif 3535 memset(hci_stack, 0, sizeof(hci_stack_t)); 3536 3537 // reference to use transport layer implementation 3538 hci_stack->hci_transport = transport; 3539 3540 // reference to used config 3541 hci_stack->config = config; 3542 3543 // setup pointer for outgoing packet buffer 3544 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3545 3546 // max acl payload size defined in config.h 3547 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3548 3549 // register packet handlers with transport 3550 transport->register_packet_handler(&packet_handler); 3551 3552 hci_stack->state = HCI_STATE_OFF; 3553 3554 // class of device 3555 hci_stack->class_of_device = 0x007a020c; // Smartphone 3556 3557 // bondable by default 3558 hci_stack->bondable = 1; 3559 3560 #ifdef ENABLE_CLASSIC 3561 // classic name 3562 hci_stack->local_name = default_classic_name; 3563 3564 // Master slave policy 3565 hci_stack->master_slave_policy = 1; 3566 3567 // Allow Role Switch 3568 hci_stack->allow_role_switch = 1; 3569 3570 // Default / minimum security level = 2 3571 hci_stack->gap_security_level = LEVEL_2; 3572 3573 // Default Security Mode 4 3574 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3575 3576 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3577 hci_stack->gap_required_encyrption_key_size = 7; 3578 3579 // Link Supervision Timeout 3580 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3581 3582 #endif 3583 3584 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3585 hci_stack->ssp_enable = 1; 3586 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3587 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3588 hci_stack->ssp_auto_accept = 1; 3589 3590 // Secure Connections: enable (requires support from Controller) 3591 hci_stack->secure_connections_enable = true; 3592 3593 // voice setting - signed 16 bit pcm data with CVSD over the air 3594 hci_stack->sco_voice_setting = 0x60; 3595 3596 #ifdef ENABLE_LE_CENTRAL 3597 // connection parameter to use for outgoing connections 3598 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3599 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3600 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3601 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3602 hci_stack->le_connection_latency = 4; // 4 3603 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3604 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3605 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3606 3607 // default LE Scanning 3608 hci_stack->le_scan_type = 0x1; // active 3609 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3610 hci_stack->le_scan_window = 0x30; // 30 ms 3611 #endif 3612 3613 #ifdef ENABLE_LE_PERIPHERAL 3614 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3615 #endif 3616 3617 // connection parameter range used to answer connection parameter update requests in l2cap 3618 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3619 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3620 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3621 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3622 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3623 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3624 3625 hci_state_reset(); 3626 } 3627 3628 void hci_deinit(void){ 3629 #ifdef HAVE_MALLOC 3630 if (hci_stack) { 3631 free(hci_stack); 3632 } 3633 #endif 3634 hci_stack = NULL; 3635 3636 #ifdef ENABLE_CLASSIC 3637 disable_l2cap_timeouts = 0; 3638 #endif 3639 } 3640 3641 /** 3642 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3643 */ 3644 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3645 hci_stack->chipset = chipset_driver; 3646 3647 // reset chipset driver - init is also called on power_up 3648 if (hci_stack->chipset && hci_stack->chipset->init){ 3649 hci_stack->chipset->init(hci_stack->config); 3650 } 3651 } 3652 3653 /** 3654 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3655 */ 3656 void hci_set_control(const btstack_control_t *hardware_control){ 3657 // references to used control implementation 3658 hci_stack->control = hardware_control; 3659 // init with transport config 3660 hardware_control->init(hci_stack->config); 3661 } 3662 3663 void hci_close(void){ 3664 3665 #ifdef ENABLE_CLASSIC 3666 // close remote device db 3667 if (hci_stack->link_key_db) { 3668 hci_stack->link_key_db->close(); 3669 } 3670 #endif 3671 3672 btstack_linked_list_iterator_t lit; 3673 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3674 while (btstack_linked_list_iterator_has_next(&lit)){ 3675 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3676 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3677 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3678 hci_shutdown_connection(connection); 3679 } 3680 3681 hci_power_control(HCI_POWER_OFF); 3682 3683 #ifdef HAVE_MALLOC 3684 free(hci_stack); 3685 #endif 3686 hci_stack = NULL; 3687 } 3688 3689 #ifdef HAVE_SCO_TRANSPORT 3690 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3691 hci_stack->sco_transport = sco_transport; 3692 sco_transport->register_packet_handler(&packet_handler); 3693 } 3694 #endif 3695 3696 #ifdef ENABLE_CLASSIC 3697 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3698 // validate ranage and set 3699 if (encryption_key_size < 7) return; 3700 if (encryption_key_size > 16) return; 3701 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3702 } 3703 3704 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3705 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3706 hci_stack->gap_security_mode = security_mode; 3707 return ERROR_CODE_SUCCESS; 3708 } else { 3709 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3710 } 3711 } 3712 3713 gap_security_mode_t gap_get_security_mode(void){ 3714 return hci_stack->gap_security_mode; 3715 } 3716 3717 void gap_set_security_level(gap_security_level_t security_level){ 3718 hci_stack->gap_security_level = security_level; 3719 } 3720 3721 gap_security_level_t gap_get_security_level(void){ 3722 if (hci_stack->gap_secure_connections_only_mode){ 3723 return LEVEL_4; 3724 } 3725 return hci_stack->gap_security_level; 3726 } 3727 3728 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3729 hci_stack->gap_minimal_service_security_level = security_level; 3730 } 3731 3732 void gap_set_secure_connections_only_mode(bool enable){ 3733 hci_stack->gap_secure_connections_only_mode = enable; 3734 } 3735 3736 bool gap_get_secure_connections_only_mode(void){ 3737 return hci_stack->gap_secure_connections_only_mode; 3738 } 3739 #endif 3740 3741 #ifdef ENABLE_CLASSIC 3742 void gap_set_class_of_device(uint32_t class_of_device){ 3743 hci_stack->class_of_device = class_of_device; 3744 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3745 hci_run(); 3746 } 3747 3748 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3749 hci_stack->default_link_policy_settings = default_link_policy_settings; 3750 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3751 hci_run(); 3752 } 3753 3754 void gap_set_allow_role_switch(bool allow_role_switch){ 3755 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3756 } 3757 3758 uint8_t hci_get_allow_role_switch(void){ 3759 return hci_stack->allow_role_switch; 3760 } 3761 3762 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3763 hci_stack->link_supervision_timeout = link_supervision_timeout; 3764 } 3765 3766 void hci_disable_l2cap_timeout_check(void){ 3767 disable_l2cap_timeouts = 1; 3768 } 3769 #endif 3770 3771 #ifndef HAVE_HOST_CONTROLLER_API 3772 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3773 void hci_set_bd_addr(bd_addr_t addr){ 3774 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3775 hci_stack->custom_bd_addr_set = 1; 3776 } 3777 #endif 3778 3779 // State-Module-Driver overview 3780 // state module low-level 3781 // HCI_STATE_OFF off close 3782 // HCI_STATE_INITIALIZING, on open 3783 // HCI_STATE_WORKING, on open 3784 // HCI_STATE_HALTING, on open 3785 // HCI_STATE_SLEEPING, off/sleep close 3786 // HCI_STATE_FALLING_ASLEEP on open 3787 3788 static int hci_power_control_on(void){ 3789 3790 // power on 3791 int err = 0; 3792 if (hci_stack->control && hci_stack->control->on){ 3793 err = (*hci_stack->control->on)(); 3794 } 3795 if (err){ 3796 log_error( "POWER_ON failed"); 3797 hci_emit_hci_open_failed(); 3798 return err; 3799 } 3800 3801 // int chipset driver 3802 if (hci_stack->chipset && hci_stack->chipset->init){ 3803 hci_stack->chipset->init(hci_stack->config); 3804 } 3805 3806 // init transport 3807 if (hci_stack->hci_transport->init){ 3808 hci_stack->hci_transport->init(hci_stack->config); 3809 } 3810 3811 // open transport 3812 err = hci_stack->hci_transport->open(); 3813 if (err){ 3814 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3815 if (hci_stack->control && hci_stack->control->off){ 3816 (*hci_stack->control->off)(); 3817 } 3818 hci_emit_hci_open_failed(); 3819 return err; 3820 } 3821 return 0; 3822 } 3823 3824 static void hci_power_control_off(void){ 3825 3826 log_info("hci_power_control_off"); 3827 3828 // close low-level device 3829 hci_stack->hci_transport->close(); 3830 3831 log_info("hci_power_control_off - hci_transport closed"); 3832 3833 // power off 3834 if (hci_stack->control && hci_stack->control->off){ 3835 (*hci_stack->control->off)(); 3836 } 3837 3838 log_info("hci_power_control_off - control closed"); 3839 3840 hci_stack->state = HCI_STATE_OFF; 3841 } 3842 3843 static void hci_power_control_sleep(void){ 3844 3845 log_info("hci_power_control_sleep"); 3846 3847 #if 0 3848 // don't close serial port during sleep 3849 3850 // close low-level device 3851 hci_stack->hci_transport->close(hci_stack->config); 3852 #endif 3853 3854 // sleep mode 3855 if (hci_stack->control && hci_stack->control->sleep){ 3856 (*hci_stack->control->sleep)(); 3857 } 3858 3859 hci_stack->state = HCI_STATE_SLEEPING; 3860 } 3861 3862 static int hci_power_control_wake(void){ 3863 3864 log_info("hci_power_control_wake"); 3865 3866 // wake on 3867 if (hci_stack->control && hci_stack->control->wake){ 3868 (*hci_stack->control->wake)(); 3869 } 3870 3871 #if 0 3872 // open low-level device 3873 int err = hci_stack->hci_transport->open(hci_stack->config); 3874 if (err){ 3875 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3876 if (hci_stack->control && hci_stack->control->off){ 3877 (*hci_stack->control->off)(); 3878 } 3879 hci_emit_hci_open_failed(); 3880 return err; 3881 } 3882 #endif 3883 3884 return 0; 3885 } 3886 3887 static void hci_power_transition_to_initializing(void){ 3888 // set up state machine 3889 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3890 hci_stack->hci_packet_buffer_reserved = false; 3891 hci_stack->state = HCI_STATE_INITIALIZING; 3892 hci_stack->substate = HCI_INIT_SEND_RESET; 3893 } 3894 3895 // returns error 3896 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3897 int err; 3898 switch (power_mode){ 3899 case HCI_POWER_ON: 3900 err = hci_power_control_on(); 3901 if (err != 0) { 3902 log_error("hci_power_control_on() error %d", err); 3903 return err; 3904 } 3905 hci_power_transition_to_initializing(); 3906 break; 3907 case HCI_POWER_OFF: 3908 // do nothing 3909 break; 3910 case HCI_POWER_SLEEP: 3911 // do nothing (with SLEEP == OFF) 3912 break; 3913 default: 3914 btstack_assert(false); 3915 break; 3916 } 3917 return ERROR_CODE_SUCCESS; 3918 } 3919 3920 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3921 switch (power_mode){ 3922 case HCI_POWER_ON: 3923 // do nothing 3924 break; 3925 case HCI_POWER_OFF: 3926 // no connections yet, just turn it off 3927 hci_power_control_off(); 3928 break; 3929 case HCI_POWER_SLEEP: 3930 // no connections yet, just turn it off 3931 hci_power_control_sleep(); 3932 break; 3933 default: 3934 btstack_assert(false); 3935 break; 3936 } 3937 return ERROR_CODE_SUCCESS; 3938 } 3939 3940 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3941 switch (power_mode){ 3942 case HCI_POWER_ON: 3943 // do nothing 3944 break; 3945 case HCI_POWER_OFF: 3946 // see hci_run 3947 hci_stack->state = HCI_STATE_HALTING; 3948 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3949 break; 3950 case HCI_POWER_SLEEP: 3951 // see hci_run 3952 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3953 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3954 break; 3955 default: 3956 btstack_assert(false); 3957 break; 3958 } 3959 return ERROR_CODE_SUCCESS; 3960 } 3961 3962 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3963 switch (power_mode){ 3964 case HCI_POWER_ON: 3965 hci_power_transition_to_initializing(); 3966 break; 3967 case HCI_POWER_OFF: 3968 // do nothing 3969 break; 3970 case HCI_POWER_SLEEP: 3971 // see hci_run 3972 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3973 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3974 break; 3975 default: 3976 btstack_assert(false); 3977 break; 3978 } 3979 return ERROR_CODE_SUCCESS; 3980 } 3981 3982 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3983 switch (power_mode){ 3984 case HCI_POWER_ON: 3985 hci_power_transition_to_initializing(); 3986 break; 3987 case HCI_POWER_OFF: 3988 // see hci_run 3989 hci_stack->state = HCI_STATE_HALTING; 3990 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3991 break; 3992 case HCI_POWER_SLEEP: 3993 // do nothing 3994 break; 3995 default: 3996 btstack_assert(false); 3997 break; 3998 } 3999 return ERROR_CODE_SUCCESS; 4000 } 4001 4002 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4003 int err; 4004 switch (power_mode){ 4005 case HCI_POWER_ON: 4006 err = hci_power_control_wake(); 4007 if (err) return err; 4008 hci_power_transition_to_initializing(); 4009 break; 4010 case HCI_POWER_OFF: 4011 hci_stack->state = HCI_STATE_HALTING; 4012 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4013 break; 4014 case HCI_POWER_SLEEP: 4015 // do nothing 4016 break; 4017 default: 4018 btstack_assert(false); 4019 break; 4020 } 4021 return ERROR_CODE_SUCCESS; 4022 } 4023 4024 int hci_power_control(HCI_POWER_MODE power_mode){ 4025 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4026 int err = 0; 4027 switch (hci_stack->state){ 4028 case HCI_STATE_OFF: 4029 err = hci_power_control_state_off(power_mode); 4030 break; 4031 case HCI_STATE_INITIALIZING: 4032 err = hci_power_control_state_initializing(power_mode); 4033 break; 4034 case HCI_STATE_WORKING: 4035 err = hci_power_control_state_working(power_mode); 4036 break; 4037 case HCI_STATE_HALTING: 4038 err = hci_power_control_state_halting(power_mode); 4039 break; 4040 case HCI_STATE_FALLING_ASLEEP: 4041 err = hci_power_control_state_falling_asleep(power_mode); 4042 break; 4043 case HCI_STATE_SLEEPING: 4044 err = hci_power_control_state_sleeping(power_mode); 4045 break; 4046 default: 4047 btstack_assert(false); 4048 break; 4049 } 4050 if (err != 0){ 4051 return err; 4052 } 4053 4054 // create internal event 4055 hci_emit_state(); 4056 4057 // trigger next/first action 4058 hci_run(); 4059 4060 return 0; 4061 } 4062 4063 4064 #ifdef ENABLE_CLASSIC 4065 4066 static void hci_update_scan_enable(void){ 4067 // 2 = page scan, 1 = inq scan 4068 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4069 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4070 hci_run(); 4071 } 4072 4073 void gap_discoverable_control(uint8_t enable){ 4074 if (enable) enable = 1; // normalize argument 4075 4076 if (hci_stack->discoverable == enable){ 4077 hci_emit_discoverable_enabled(hci_stack->discoverable); 4078 return; 4079 } 4080 4081 hci_stack->discoverable = enable; 4082 hci_update_scan_enable(); 4083 } 4084 4085 void gap_connectable_control(uint8_t enable){ 4086 if (enable) enable = 1; // normalize argument 4087 4088 // don't emit event 4089 if (hci_stack->connectable == enable) return; 4090 4091 hci_stack->connectable = enable; 4092 hci_update_scan_enable(); 4093 } 4094 #endif 4095 4096 void gap_local_bd_addr(bd_addr_t address_buffer){ 4097 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4098 } 4099 4100 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4101 static void hci_host_num_completed_packets(void){ 4102 4103 // create packet manually as arrays are not supported and num_commands should not get reduced 4104 hci_reserve_packet_buffer(); 4105 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4106 4107 uint16_t size = 0; 4108 uint16_t num_handles = 0; 4109 packet[size++] = 0x35; 4110 packet[size++] = 0x0c; 4111 size++; // skip param len 4112 size++; // skip num handles 4113 4114 // add { handle, packets } entries 4115 btstack_linked_item_t * it; 4116 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4117 hci_connection_t * connection = (hci_connection_t *) it; 4118 if (connection->num_packets_completed){ 4119 little_endian_store_16(packet, size, connection->con_handle); 4120 size += 2; 4121 little_endian_store_16(packet, size, connection->num_packets_completed); 4122 size += 2; 4123 // 4124 num_handles++; 4125 connection->num_packets_completed = 0; 4126 } 4127 } 4128 4129 packet[2] = size - 3; 4130 packet[3] = num_handles; 4131 4132 hci_stack->host_completed_packets = 0; 4133 4134 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4135 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4136 4137 // release packet buffer for synchronous transport implementations 4138 if (hci_transport_synchronous()){ 4139 hci_release_packet_buffer(); 4140 hci_emit_transport_packet_sent(); 4141 } 4142 } 4143 #endif 4144 4145 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4146 UNUSED(ds); 4147 hci_stack->substate = HCI_HALTING_CLOSE; 4148 // allow packet handlers to defer final shutdown 4149 hci_emit_state(); 4150 hci_run(); 4151 } 4152 4153 static bool hci_run_acl_fragments(void){ 4154 if (hci_stack->acl_fragmentation_total_size > 0u) { 4155 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4156 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4157 if (connection) { 4158 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4159 hci_send_acl_packet_fragments(connection); 4160 return true; 4161 } 4162 } else { 4163 // connection gone -> discard further fragments 4164 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4165 hci_stack->acl_fragmentation_total_size = 0; 4166 hci_stack->acl_fragmentation_pos = 0; 4167 } 4168 } 4169 return false; 4170 } 4171 4172 #ifdef ENABLE_CLASSIC 4173 static bool hci_run_general_gap_classic(void){ 4174 4175 // assert stack is working and classic is active 4176 if (hci_classic_supported() == false) return false; 4177 if (hci_stack->state != HCI_STATE_WORKING) return false; 4178 4179 // decline incoming connections 4180 if (hci_stack->decline_reason){ 4181 uint8_t reason = hci_stack->decline_reason; 4182 hci_stack->decline_reason = 0; 4183 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4184 return true; 4185 } 4186 4187 if (hci_stack->gap_tasks != 0){ 4188 hci_run_gap_tasks_classic(); 4189 return true; 4190 } 4191 4192 // start/stop inquiry 4193 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4194 uint8_t duration = hci_stack->inquiry_state; 4195 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4196 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4197 return true; 4198 } 4199 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4200 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4201 hci_send_cmd(&hci_inquiry_cancel); 4202 return true; 4203 } 4204 // remote name request 4205 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4206 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4207 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4208 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4209 return true; 4210 } 4211 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4212 // Local OOB data 4213 if (hci_stack->classic_read_local_oob_data){ 4214 hci_stack->classic_read_local_oob_data = false; 4215 if (hci_stack->local_supported_commands[1] & 0x10u){ 4216 hci_send_cmd(&hci_read_local_extended_oob_data); 4217 } else { 4218 hci_send_cmd(&hci_read_local_oob_data); 4219 } 4220 } 4221 #endif 4222 // pairing 4223 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4224 uint8_t state = hci_stack->gap_pairing_state; 4225 uint8_t pin_code[16]; 4226 switch (state){ 4227 case GAP_PAIRING_STATE_SEND_PIN: 4228 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4229 memset(pin_code, 0, 16); 4230 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4231 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4232 break; 4233 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4234 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4235 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4236 break; 4237 case GAP_PAIRING_STATE_SEND_PASSKEY: 4238 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4239 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4240 break; 4241 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4242 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4243 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4244 break; 4245 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4246 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4247 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4248 break; 4249 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4250 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4251 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4252 break; 4253 default: 4254 break; 4255 } 4256 return true; 4257 } 4258 return false; 4259 } 4260 #endif 4261 4262 #ifdef ENABLE_BLE 4263 static bool hci_run_general_gap_le(void){ 4264 4265 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4266 4267 if (hci_stack->state != HCI_STATE_WORKING) return false; 4268 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4269 4270 4271 // Phase 1: collect what to stop 4272 4273 bool scanning_stop = false; 4274 bool connecting_stop = false; 4275 bool advertising_stop = false; 4276 4277 #ifndef ENABLE_LE_CENTRAL 4278 UNUSED(scanning_stop); 4279 UNUSED(connecting_stop); 4280 #endif 4281 #ifndef ENABLE_LE_PERIPHERAL 4282 UNUSED(advertising_stop); 4283 #endif 4284 4285 // check if whitelist needs modification 4286 bool whitelist_modification_pending = false; 4287 btstack_linked_list_iterator_t lit; 4288 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4289 while (btstack_linked_list_iterator_has_next(&lit)){ 4290 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4291 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4292 whitelist_modification_pending = true; 4293 break; 4294 } 4295 } 4296 // check if resolving list needs modification 4297 bool resolving_list_modification_pending = false; 4298 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4299 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4300 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4301 resolving_list_modification_pending = true; 4302 } 4303 #endif 4304 4305 #ifdef ENABLE_LE_CENTRAL 4306 // scanning control 4307 if (hci_stack->le_scanning_active) { 4308 // stop if: 4309 // - parameter change required 4310 // - it's disabled 4311 // - whitelist change required but used for scanning 4312 // - resolving list modified 4313 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4314 if ((hci_stack->le_scanning_param_update) || 4315 !hci_stack->le_scanning_enabled || 4316 scanning_uses_whitelist || 4317 resolving_list_modification_pending){ 4318 4319 scanning_stop = true; 4320 } 4321 } 4322 #endif 4323 4324 #ifdef ENABLE_LE_CENTRAL 4325 // connecting control 4326 bool connecting_with_whitelist; 4327 switch (hci_stack->le_connecting_state){ 4328 case LE_CONNECTING_DIRECT: 4329 case LE_CONNECTING_WHITELIST: 4330 // stop connecting if: 4331 // - connecting uses white and whitelist modification pending 4332 // - if it got disabled 4333 // - resolving list modified 4334 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4335 if ((connecting_with_whitelist && whitelist_modification_pending) || 4336 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4337 resolving_list_modification_pending) { 4338 4339 connecting_stop = true; 4340 } 4341 break; 4342 default: 4343 break; 4344 } 4345 #endif 4346 4347 #ifdef ENABLE_LE_PERIPHERAL 4348 // le advertisement control 4349 if (hci_stack->le_advertisements_active){ 4350 // stop if: 4351 // - parameter change required 4352 // - it's disabled 4353 // - whitelist change required but used for advertisement filter policy 4354 // - resolving list modified 4355 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4356 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4357 if (advertising_change || 4358 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4359 (advertising_uses_whitelist & whitelist_modification_pending) || 4360 resolving_list_modification_pending) { 4361 4362 advertising_stop = true; 4363 } 4364 } 4365 #endif 4366 4367 4368 // Phase 2: stop everything that should be off during modifications 4369 4370 #ifdef ENABLE_LE_CENTRAL 4371 if (scanning_stop){ 4372 hci_stack->le_scanning_active = false; 4373 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4374 return true; 4375 } 4376 #endif 4377 4378 #ifdef ENABLE_LE_CENTRAL 4379 if (connecting_stop){ 4380 hci_send_cmd(&hci_le_create_connection_cancel); 4381 return true; 4382 } 4383 #endif 4384 4385 #ifdef ENABLE_LE_PERIPHERAL 4386 if (advertising_stop){ 4387 hci_stack->le_advertisements_active = false; 4388 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4389 return true; 4390 } 4391 #endif 4392 4393 // Phase 3: modify 4394 4395 #ifdef ENABLE_LE_CENTRAL 4396 if (hci_stack->le_scanning_param_update){ 4397 hci_stack->le_scanning_param_update = false; 4398 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4399 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4400 return true; 4401 } 4402 #endif 4403 4404 #ifdef ENABLE_LE_PERIPHERAL 4405 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4406 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4407 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4408 hci_send_cmd(&hci_le_set_advertising_parameters, 4409 hci_stack->le_advertisements_interval_min, 4410 hci_stack->le_advertisements_interval_max, 4411 hci_stack->le_advertisements_type, 4412 hci_stack->le_advertisements_own_addr_type, 4413 hci_stack->le_advertisements_direct_address_type, 4414 hci_stack->le_advertisements_direct_address, 4415 hci_stack->le_advertisements_channel_map, 4416 hci_stack->le_advertisements_filter_policy); 4417 return true; 4418 } 4419 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4420 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4421 uint8_t adv_data_clean[31]; 4422 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4423 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4424 hci_stack->le_advertisements_data_len); 4425 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4426 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4427 return true; 4428 } 4429 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4430 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4431 uint8_t scan_data_clean[31]; 4432 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4433 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4434 hci_stack->le_scan_response_data_len); 4435 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4436 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4437 return true; 4438 } 4439 #endif 4440 4441 4442 #ifdef ENABLE_LE_CENTRAL 4443 // if connect with whitelist was active and is not cancelled yet, wait until next time 4444 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4445 #endif 4446 4447 // LE Whitelist Management 4448 if (whitelist_modification_pending){ 4449 // add/remove entries 4450 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4451 while (btstack_linked_list_iterator_has_next(&lit)){ 4452 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4453 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4454 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4455 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4456 return true; 4457 } 4458 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4459 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4460 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4461 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4462 return true; 4463 } 4464 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4465 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4466 btstack_memory_whitelist_entry_free(entry); 4467 } 4468 } 4469 } 4470 4471 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4472 // LE Resolving List Management 4473 if (resolving_list_supported) { 4474 uint16_t i; 4475 switch (hci_stack->le_resolving_list_state) { 4476 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4477 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4478 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4479 return true; 4480 case LE_RESOLVING_LIST_READ_SIZE: 4481 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4482 hci_send_cmd(&hci_le_read_resolving_list_size); 4483 return true; 4484 case LE_RESOLVING_LIST_SEND_CLEAR: 4485 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4486 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4487 sizeof(hci_stack->le_resolving_list_add_entries)); 4488 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4489 sizeof(hci_stack->le_resolving_list_remove_entries)); 4490 hci_send_cmd(&hci_le_clear_resolving_list); 4491 return true; 4492 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4493 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4494 uint8_t offset = i >> 3; 4495 uint8_t mask = 1 << (i & 7); 4496 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4497 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4498 bd_addr_t peer_identity_addreses; 4499 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4500 sm_key_t peer_irk; 4501 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4502 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4503 4504 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4505 // trigger whitelist entry 'update' (work around for controller bug) 4506 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4507 while (btstack_linked_list_iterator_has_next(&lit)) { 4508 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4509 if (entry->address_type != peer_identity_addr_type) continue; 4510 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4511 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4512 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4513 } 4514 #endif 4515 4516 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4517 peer_identity_addreses); 4518 return true; 4519 } 4520 4521 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4522 4523 /* fall through */ 4524 4525 case LE_RESOLVING_LIST_ADD_ENTRIES: 4526 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4527 uint8_t offset = i >> 3; 4528 uint8_t mask = 1 << (i & 7); 4529 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4530 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4531 bd_addr_t peer_identity_addreses; 4532 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4533 sm_key_t peer_irk; 4534 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4535 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4536 const uint8_t *local_irk = gap_get_persistent_irk(); 4537 // command uses format specifier 'P' that stores 16-byte value without flip 4538 uint8_t local_irk_flipped[16]; 4539 uint8_t peer_irk_flipped[16]; 4540 reverse_128(local_irk, local_irk_flipped); 4541 reverse_128(peer_irk, peer_irk_flipped); 4542 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4543 peer_irk_flipped, local_irk_flipped); 4544 return true; 4545 } 4546 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4547 break; 4548 4549 default: 4550 break; 4551 } 4552 } 4553 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4554 #endif 4555 4556 // Phase 4: restore state 4557 4558 #ifdef ENABLE_LE_CENTRAL 4559 // re-start scanning 4560 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4561 hci_stack->le_scanning_active = true; 4562 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4563 return true; 4564 } 4565 #endif 4566 4567 #ifdef ENABLE_LE_CENTRAL 4568 // re-start connecting 4569 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4570 bd_addr_t null_addr; 4571 memset(null_addr, 0, 6); 4572 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4573 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4574 hci_send_cmd(&hci_le_create_connection, 4575 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4576 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4577 1, // use whitelist 4578 0, // peer address type 4579 null_addr, // peer bd addr 4580 hci_stack->le_connection_own_addr_type, // our addr type: 4581 hci_stack->le_connection_interval_min, // conn interval min 4582 hci_stack->le_connection_interval_max, // conn interval max 4583 hci_stack->le_connection_latency, // conn latency 4584 hci_stack->le_supervision_timeout, // conn latency 4585 hci_stack->le_minimum_ce_length, // min ce length 4586 hci_stack->le_maximum_ce_length // max ce length 4587 ); 4588 return true; 4589 } 4590 #endif 4591 4592 #ifdef ENABLE_LE_PERIPHERAL 4593 // re-start advertising 4594 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4595 // check if advertisements should be enabled given 4596 hci_stack->le_advertisements_active = true; 4597 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4598 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4599 return true; 4600 } 4601 #endif 4602 4603 return false; 4604 } 4605 #endif 4606 4607 static bool hci_run_general_pending_commands(void){ 4608 btstack_linked_item_t * it; 4609 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4610 hci_connection_t * connection = (hci_connection_t *) it; 4611 4612 switch(connection->state){ 4613 case SEND_CREATE_CONNECTION: 4614 switch(connection->address_type){ 4615 #ifdef ENABLE_CLASSIC 4616 case BD_ADDR_TYPE_ACL: 4617 log_info("sending hci_create_connection"); 4618 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4619 break; 4620 #endif 4621 default: 4622 #ifdef ENABLE_BLE 4623 #ifdef ENABLE_LE_CENTRAL 4624 log_info("sending hci_le_create_connection"); 4625 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4626 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4627 hci_send_cmd(&hci_le_create_connection, 4628 hci_stack->le_connection_scan_interval, // conn scan interval 4629 hci_stack->le_connection_scan_window, // conn scan windows 4630 0, // don't use whitelist 4631 connection->address_type, // peer address type 4632 connection->address, // peer bd addr 4633 hci_stack->le_connection_own_addr_type, // our addr type: 4634 hci_stack->le_connection_interval_min, // conn interval min 4635 hci_stack->le_connection_interval_max, // conn interval max 4636 hci_stack->le_connection_latency, // conn latency 4637 hci_stack->le_supervision_timeout, // conn latency 4638 hci_stack->le_minimum_ce_length, // min ce length 4639 hci_stack->le_maximum_ce_length // max ce length 4640 ); 4641 connection->state = SENT_CREATE_CONNECTION; 4642 #endif 4643 #endif 4644 break; 4645 } 4646 return true; 4647 4648 #ifdef ENABLE_CLASSIC 4649 case RECEIVED_CONNECTION_REQUEST: 4650 connection->role = HCI_ROLE_SLAVE; 4651 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4652 log_info("sending hci_accept_connection_request"); 4653 connection->state = ACCEPTED_CONNECTION_REQUEST; 4654 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4655 } 4656 return true; 4657 #endif 4658 4659 #ifdef ENABLE_BLE 4660 #ifdef ENABLE_LE_CENTRAL 4661 case SEND_CANCEL_CONNECTION: 4662 connection->state = SENT_CANCEL_CONNECTION; 4663 hci_send_cmd(&hci_le_create_connection_cancel); 4664 return true; 4665 #endif 4666 #endif 4667 case SEND_DISCONNECT: 4668 connection->state = SENT_DISCONNECT; 4669 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4670 return true; 4671 4672 default: 4673 break; 4674 } 4675 4676 // no further commands if connection is about to get shut down 4677 if (connection->state == SENT_DISCONNECT) continue; 4678 4679 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4680 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4681 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4682 return true; 4683 } 4684 4685 #ifdef ENABLE_CLASSIC 4686 4687 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4688 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4689 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4690 return true; 4691 } 4692 4693 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4694 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4695 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4696 return true; 4697 } 4698 4699 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4700 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4701 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4702 return true; 4703 } 4704 4705 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4706 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4707 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4708 return true; 4709 } 4710 4711 // Handling link key request requires remote supported features 4712 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4713 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4714 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4715 4716 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4717 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4718 if (have_link_key && security_level_sufficient){ 4719 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4720 } else { 4721 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4722 } 4723 return true; 4724 } 4725 4726 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4727 log_info("denying to pin request"); 4728 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4729 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4730 return true; 4731 } 4732 4733 // security assessment requires remote features 4734 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4735 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4736 hci_ssp_assess_security_on_io_cap_request(connection); 4737 // 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 4738 } 4739 4740 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4741 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4742 // set authentication requirements: 4743 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4744 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4745 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4746 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4747 authreq |= 1; 4748 } 4749 bool bonding = hci_stack->bondable; 4750 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4751 // if we have received IO Cap Response, we're in responder role 4752 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4753 if (bonding && !remote_bonding){ 4754 log_info("Remote not bonding, dropping local flag"); 4755 bonding = false; 4756 } 4757 } 4758 if (bonding){ 4759 if (connection->bonding_flags & BONDING_DEDICATED){ 4760 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4761 } else { 4762 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4763 } 4764 } 4765 uint8_t have_oob_data = 0; 4766 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4767 if (connection->classic_oob_c_192 != NULL){ 4768 have_oob_data |= 1; 4769 } 4770 if (connection->classic_oob_c_256 != NULL){ 4771 have_oob_data |= 2; 4772 } 4773 #endif 4774 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4775 return true; 4776 } 4777 4778 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4779 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4780 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4781 return true; 4782 } 4783 4784 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4785 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4786 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4787 const uint8_t zero[16] = { 0 }; 4788 const uint8_t * r_192 = zero; 4789 const uint8_t * c_192 = zero; 4790 const uint8_t * r_256 = zero; 4791 const uint8_t * c_256 = zero; 4792 // verify P-256 OOB 4793 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4794 c_256 = connection->classic_oob_c_256; 4795 if (connection->classic_oob_r_256 != NULL) { 4796 r_256 = connection->classic_oob_r_256; 4797 } 4798 } 4799 // verify P-192 OOB 4800 if ((connection->classic_oob_c_192 != NULL)) { 4801 c_192 = connection->classic_oob_c_192; 4802 if (connection->classic_oob_r_192 != NULL) { 4803 r_192 = connection->classic_oob_r_192; 4804 } 4805 } 4806 4807 // assess security 4808 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4809 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4810 if (need_level_4 && !can_reach_level_4){ 4811 log_info("Level 4 required, but not possible -> abort"); 4812 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4813 // send oob negative reply 4814 c_256 = NULL; 4815 c_192 = NULL; 4816 } 4817 4818 // Reply 4819 if (c_256 != zero) { 4820 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4821 } else if (c_192 != zero){ 4822 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4823 } else { 4824 hci_stack->classic_oob_con_handle = connection->con_handle; 4825 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4826 } 4827 return true; 4828 } 4829 #endif 4830 4831 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4832 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4833 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4834 return true; 4835 } 4836 4837 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4838 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4839 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4840 return true; 4841 } 4842 4843 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4844 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4845 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4846 return true; 4847 } 4848 4849 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4850 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4851 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4852 connection->state = SENT_DISCONNECT; 4853 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4854 return true; 4855 } 4856 4857 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4858 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4859 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4860 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4861 return true; 4862 } 4863 4864 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4865 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4866 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4867 return true; 4868 } 4869 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4870 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4871 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4872 return true; 4873 } 4874 #endif 4875 4876 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4877 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4878 #ifdef ENABLE_CLASSIC 4879 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4880 #endif 4881 if (connection->state != SENT_DISCONNECT){ 4882 connection->state = SENT_DISCONNECT; 4883 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4884 return true; 4885 } 4886 } 4887 4888 #ifdef ENABLE_CLASSIC 4889 uint16_t sniff_min_interval; 4890 switch (connection->sniff_min_interval){ 4891 case 0: 4892 break; 4893 case 0xffff: 4894 connection->sniff_min_interval = 0; 4895 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4896 return true; 4897 default: 4898 sniff_min_interval = connection->sniff_min_interval; 4899 connection->sniff_min_interval = 0; 4900 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4901 return true; 4902 } 4903 4904 if (connection->sniff_subrating_max_latency != 0xffff){ 4905 uint16_t max_latency = connection->sniff_subrating_max_latency; 4906 connection->sniff_subrating_max_latency = 0; 4907 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4908 return true; 4909 } 4910 4911 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4912 uint8_t service_type = (uint8_t) connection->qos_service_type; 4913 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4914 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); 4915 return true; 4916 } 4917 4918 if (connection->request_role != HCI_ROLE_INVALID){ 4919 hci_role_t role = connection->request_role; 4920 connection->request_role = HCI_ROLE_INVALID; 4921 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4922 return true; 4923 } 4924 #endif 4925 4926 #ifdef ENABLE_BLE 4927 switch (connection->le_con_parameter_update_state){ 4928 // response to L2CAP CON PARAMETER UPDATE REQUEST 4929 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4930 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4931 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4932 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4933 0x0000, 0xffff); 4934 return true; 4935 case CON_PARAMETER_UPDATE_REPLY: 4936 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4937 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4938 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4939 0x0000, 0xffff); 4940 return true; 4941 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4942 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4943 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4944 return true; 4945 default: 4946 break; 4947 } 4948 if (connection->le_phy_update_all_phys != 0xffu){ 4949 uint8_t all_phys = connection->le_phy_update_all_phys; 4950 connection->le_phy_update_all_phys = 0xff; 4951 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); 4952 return true; 4953 } 4954 #endif 4955 } 4956 return false; 4957 } 4958 4959 static void hci_run(void){ 4960 4961 bool done; 4962 4963 // send continuation fragments first, as they block the prepared packet buffer 4964 done = hci_run_acl_fragments(); 4965 if (done) return; 4966 4967 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4968 // send host num completed packets next as they don't require num_cmd_packets > 0 4969 if (!hci_can_send_comand_packet_transport()) return; 4970 if (hci_stack->host_completed_packets){ 4971 hci_host_num_completed_packets(); 4972 return; 4973 } 4974 #endif 4975 4976 if (!hci_can_send_command_packet_now()) return; 4977 4978 // global/non-connection oriented commands 4979 4980 4981 #ifdef ENABLE_CLASSIC 4982 // general gap classic 4983 done = hci_run_general_gap_classic(); 4984 if (done) return; 4985 #endif 4986 4987 #ifdef ENABLE_BLE 4988 // general gap le 4989 done = hci_run_general_gap_le(); 4990 if (done) return; 4991 #endif 4992 4993 // send pending HCI commands 4994 done = hci_run_general_pending_commands(); 4995 if (done) return; 4996 4997 // stack state sub statemachines 4998 hci_connection_t * connection; 4999 switch (hci_stack->state){ 5000 case HCI_STATE_INITIALIZING: 5001 hci_initializing_run(); 5002 break; 5003 5004 case HCI_STATE_HALTING: 5005 5006 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5007 switch (hci_stack->substate){ 5008 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5009 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5010 5011 #ifdef ENABLE_BLE 5012 #ifdef ENABLE_LE_CENTRAL 5013 // free whitelist entries 5014 { 5015 btstack_linked_list_iterator_t lit; 5016 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5017 while (btstack_linked_list_iterator_has_next(&lit)){ 5018 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5019 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5020 btstack_memory_whitelist_entry_free(entry); 5021 } 5022 } 5023 #endif 5024 #endif 5025 // close all open connections 5026 connection = (hci_connection_t *) hci_stack->connections; 5027 if (connection){ 5028 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5029 if (!hci_can_send_command_packet_now()) return; 5030 5031 // check state 5032 if (connection->state == SENT_DISCONNECT) return; 5033 connection->state = SENT_DISCONNECT; 5034 5035 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5036 5037 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5038 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5039 5040 // ... which would be ignored anyway as we shutdown (free) the connection now 5041 hci_shutdown_connection(connection); 5042 5043 // finally, send the disconnect command 5044 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5045 return; 5046 } 5047 5048 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5049 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5050 log_info("HCI_STATE_HALTING: wait 50 ms"); 5051 hci_stack->substate = HCI_HALTING_W4_TIMER; 5052 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5053 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5054 btstack_run_loop_add_timer(&hci_stack->timeout); 5055 break; 5056 } 5057 5058 /* fall through */ 5059 5060 case HCI_HALTING_CLOSE: 5061 log_info("HCI_STATE_HALTING, calling off"); 5062 5063 // switch mode 5064 hci_power_control_off(); 5065 5066 log_info("HCI_STATE_HALTING, emitting state"); 5067 hci_emit_state(); 5068 log_info("HCI_STATE_HALTING, done"); 5069 break; 5070 5071 case HCI_HALTING_W4_TIMER: 5072 // keep waiting 5073 5074 break; 5075 default: 5076 break; 5077 } 5078 5079 break; 5080 5081 case HCI_STATE_FALLING_ASLEEP: 5082 switch(hci_stack->substate) { 5083 case HCI_FALLING_ASLEEP_DISCONNECT: 5084 log_info("HCI_STATE_FALLING_ASLEEP"); 5085 // close all open connections 5086 connection = (hci_connection_t *) hci_stack->connections; 5087 if (connection){ 5088 5089 // send disconnect 5090 if (!hci_can_send_command_packet_now()) return; 5091 5092 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5093 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5094 5095 // send disconnected event right away - causes higher layer connections to get closed, too. 5096 hci_shutdown_connection(connection); 5097 return; 5098 } 5099 5100 if (hci_classic_supported()){ 5101 // disable page and inquiry scan 5102 if (!hci_can_send_command_packet_now()) return; 5103 5104 log_info("HCI_STATE_HALTING, disabling inq scans"); 5105 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5106 5107 // continue in next sub state 5108 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5109 break; 5110 } 5111 5112 /* fall through */ 5113 5114 case HCI_FALLING_ASLEEP_COMPLETE: 5115 log_info("HCI_STATE_HALTING, calling sleep"); 5116 // switch mode 5117 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5118 hci_emit_state(); 5119 break; 5120 5121 default: 5122 break; 5123 } 5124 break; 5125 5126 default: 5127 break; 5128 } 5129 } 5130 5131 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5132 // house-keeping 5133 5134 #ifdef ENABLE_CLASSIC 5135 bd_addr_t addr; 5136 hci_connection_t * conn; 5137 #endif 5138 #ifdef ENABLE_LE_CENTRAL 5139 uint8_t initiator_filter_policy; 5140 #endif 5141 5142 uint16_t opcode = little_endian_read_16(packet, 0); 5143 switch (opcode) { 5144 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5145 hci_stack->loopback_mode = packet[3]; 5146 break; 5147 5148 #ifdef ENABLE_CLASSIC 5149 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5150 reverse_bd_addr(&packet[3], addr); 5151 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5152 5153 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5154 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5155 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5156 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5157 } 5158 5159 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5160 if (!conn) { 5161 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5162 if (!conn) { 5163 // notify client that alloc failed 5164 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5165 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5166 } 5167 conn->state = SEND_CREATE_CONNECTION; 5168 conn->role = HCI_ROLE_MASTER; 5169 } 5170 5171 conn->con_handle = HCI_CON_HANDLE_INVALID; 5172 conn->role = HCI_ROLE_INVALID; 5173 5174 log_info("conn state %u", conn->state); 5175 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5176 switch (conn->state) { 5177 // if connection active exists 5178 case OPEN: 5179 // and OPEN, emit connection complete command 5180 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5181 // packet not sent to controller 5182 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5183 case RECEIVED_DISCONNECTION_COMPLETE: 5184 // create connection triggered in disconnect complete event, let's do it now 5185 break; 5186 case SEND_CREATE_CONNECTION: 5187 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5188 break; 5189 default: 5190 // otherwise, just ignore as it is already in the open process 5191 // packet not sent to controller 5192 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5193 } 5194 conn->state = SENT_CREATE_CONNECTION; 5195 5196 // track outgoing connection 5197 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5198 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5199 break; 5200 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5201 if (hci_stack->link_key_db) { 5202 reverse_bd_addr(&packet[3], addr); 5203 hci_stack->link_key_db->delete_link_key(addr); 5204 } 5205 break; 5206 5207 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5208 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5209 // setup_synchronous_connection? Voice setting at offset 22 5210 // TODO: compare to current setting if sco connection already active 5211 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5212 break; 5213 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5214 // accept_synchronus_connection? Voice setting at offset 18 5215 // TODO: compare to current setting if sco connection already active 5216 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5217 break; 5218 #endif 5219 #endif 5220 5221 #ifdef ENABLE_BLE 5222 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5223 hci_stack->le_random_address_set = 1; 5224 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5225 break; 5226 #ifdef ENABLE_LE_PERIPHERAL 5227 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5228 hci_stack->le_advertisements_active = packet[3] != 0; 5229 break; 5230 #endif 5231 #ifdef ENABLE_LE_CENTRAL 5232 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5233 // white list used? 5234 initiator_filter_policy = packet[7]; 5235 switch (initiator_filter_policy) { 5236 case 0: 5237 // whitelist not used 5238 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5239 break; 5240 case 1: 5241 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5242 break; 5243 default: 5244 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5245 break; 5246 } 5247 // track outgoing connection 5248 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5249 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5250 break; 5251 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5252 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5253 break; 5254 #endif 5255 #endif 5256 default: 5257 break; 5258 } 5259 5260 hci_stack->num_cmd_packets--; 5261 5262 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5263 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5264 if (err != 0){ 5265 return ERROR_CODE_HARDWARE_FAILURE; 5266 } 5267 return ERROR_CODE_SUCCESS; 5268 } 5269 5270 // disconnect because of security block 5271 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5272 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5273 if (!connection) return; 5274 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5275 } 5276 5277 5278 // Configure Secure Simple Pairing 5279 5280 #ifdef ENABLE_CLASSIC 5281 5282 // enable will enable SSP during init 5283 void gap_ssp_set_enable(int enable){ 5284 hci_stack->ssp_enable = enable; 5285 } 5286 5287 static int hci_local_ssp_activated(void){ 5288 return gap_ssp_supported() && hci_stack->ssp_enable; 5289 } 5290 5291 // if set, BTstack will respond to io capability request using authentication requirement 5292 void gap_ssp_set_io_capability(int io_capability){ 5293 hci_stack->ssp_io_capability = io_capability; 5294 } 5295 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5296 hci_stack->ssp_authentication_requirement = authentication_requirement; 5297 } 5298 5299 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5300 void gap_ssp_set_auto_accept(int auto_accept){ 5301 hci_stack->ssp_auto_accept = auto_accept; 5302 } 5303 5304 void gap_secure_connections_enable(bool enable){ 5305 hci_stack->secure_connections_enable = enable; 5306 } 5307 5308 #endif 5309 5310 // va_list part of hci_send_cmd 5311 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5312 if (!hci_can_send_command_packet_now()){ 5313 log_error("hci_send_cmd called but cannot send packet now"); 5314 return ERROR_CODE_COMMAND_DISALLOWED; 5315 } 5316 5317 // for HCI INITIALIZATION 5318 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5319 hci_stack->last_cmd_opcode = cmd->opcode; 5320 5321 hci_reserve_packet_buffer(); 5322 uint8_t * packet = hci_stack->hci_packet_buffer; 5323 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5324 uint8_t status = hci_send_cmd_packet(packet, size); 5325 5326 // release packet buffer on error or for synchronous transport implementations 5327 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5328 hci_release_packet_buffer(); 5329 hci_emit_transport_packet_sent(); 5330 } 5331 5332 return status; 5333 } 5334 5335 /** 5336 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5337 */ 5338 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5339 va_list argptr; 5340 va_start(argptr, cmd); 5341 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5342 va_end(argptr); 5343 return status; 5344 } 5345 5346 // Create various non-HCI events. 5347 // TODO: generalize, use table similar to hci_create_command 5348 5349 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5350 // dump packet 5351 if (dump) { 5352 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5353 } 5354 5355 // dispatch to all event handlers 5356 btstack_linked_list_iterator_t it; 5357 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5358 while (btstack_linked_list_iterator_has_next(&it)){ 5359 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5360 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5361 } 5362 } 5363 5364 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5365 if (!hci_stack->acl_packet_handler) return; 5366 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5367 } 5368 5369 #ifdef ENABLE_CLASSIC 5370 static void hci_notify_if_sco_can_send_now(void){ 5371 // notify SCO sender if waiting 5372 if (!hci_stack->sco_waiting_for_can_send_now) return; 5373 if (hci_can_send_sco_packet_now()){ 5374 hci_stack->sco_waiting_for_can_send_now = 0; 5375 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5376 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5377 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5378 } 5379 } 5380 5381 // parsing end emitting has been merged to reduce code size 5382 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5383 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5384 5385 uint8_t * eir_data; 5386 ad_context_t context; 5387 const uint8_t * name; 5388 uint8_t name_len; 5389 5390 if (size < 3) return; 5391 5392 int event_type = hci_event_packet_get_type(packet); 5393 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5394 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5395 5396 switch (event_type){ 5397 case HCI_EVENT_INQUIRY_RESULT: 5398 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5399 if (size != (3 + (num_responses * 14))) return; 5400 break; 5401 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5402 if (size != 257) return; 5403 if (num_responses != 1) return; 5404 break; 5405 default: 5406 return; 5407 } 5408 5409 // event[1] is set at the end 5410 int i; 5411 for (i=0; i<num_responses;i++){ 5412 memset(event, 0, sizeof(event)); 5413 event[0] = GAP_EVENT_INQUIRY_RESULT; 5414 uint8_t event_size = 27; // if name is not set by EIR 5415 5416 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5417 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5418 (void)memcpy(&event[9], 5419 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5420 3); // class of device 5421 (void)memcpy(&event[12], 5422 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5423 2); // clock offset 5424 5425 switch (event_type){ 5426 case HCI_EVENT_INQUIRY_RESULT: 5427 // 14,15,16,17 = 0, size 18 5428 break; 5429 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5430 event[14] = 1; 5431 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5432 // 16,17 = 0, size 18 5433 break; 5434 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5435 event[14] = 1; 5436 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5437 // EIR packets only contain a single inquiry response 5438 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5439 name = NULL; 5440 // Iterate over EIR data 5441 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5442 uint8_t data_type = ad_iterator_get_data_type(&context); 5443 uint8_t data_size = ad_iterator_get_data_len(&context); 5444 const uint8_t * data = ad_iterator_get_data(&context); 5445 // Prefer Complete Local Name over Shortened Local Name 5446 switch (data_type){ 5447 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5448 if (name) continue; 5449 /* fall through */ 5450 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5451 name = data; 5452 name_len = data_size; 5453 break; 5454 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5455 if (data_size != 8) break; 5456 event[16] = 1; 5457 memcpy(&event[17], data, 8); 5458 break; 5459 default: 5460 break; 5461 } 5462 } 5463 if (name){ 5464 event[25] = 1; 5465 // truncate name if needed 5466 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5467 event[26] = len; 5468 (void)memcpy(&event[27], name, len); 5469 event_size += len; 5470 } 5471 break; 5472 default: 5473 return; 5474 } 5475 event[1] = event_size - 2; 5476 hci_emit_event(event, event_size, 1); 5477 } 5478 } 5479 #endif 5480 5481 void hci_emit_state(void){ 5482 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5483 uint8_t event[3]; 5484 event[0] = BTSTACK_EVENT_STATE; 5485 event[1] = sizeof(event) - 2u; 5486 event[2] = hci_stack->state; 5487 hci_emit_event(event, sizeof(event), 1); 5488 } 5489 5490 #ifdef ENABLE_CLASSIC 5491 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5492 uint8_t event[13]; 5493 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5494 event[1] = sizeof(event) - 2; 5495 event[2] = status; 5496 little_endian_store_16(event, 3, con_handle); 5497 reverse_bd_addr(address, &event[5]); 5498 event[11] = 1; // ACL connection 5499 event[12] = 0; // encryption disabled 5500 hci_emit_event(event, sizeof(event), 1); 5501 } 5502 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5503 if (disable_l2cap_timeouts) return; 5504 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5505 uint8_t event[4]; 5506 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5507 event[1] = sizeof(event) - 2; 5508 little_endian_store_16(event, 2, conn->con_handle); 5509 hci_emit_event(event, sizeof(event), 1); 5510 } 5511 #endif 5512 5513 #ifdef ENABLE_BLE 5514 #ifdef ENABLE_LE_CENTRAL 5515 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){ 5516 uint8_t event[21]; 5517 event[0] = HCI_EVENT_LE_META; 5518 event[1] = sizeof(event) - 2u; 5519 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5520 event[3] = status; 5521 little_endian_store_16(event, 4, con_handle); 5522 event[6] = 0; // TODO: role 5523 event[7] = address_type; 5524 reverse_bd_addr(address, &event[8]); 5525 little_endian_store_16(event, 14, 0); // interval 5526 little_endian_store_16(event, 16, 0); // latency 5527 little_endian_store_16(event, 18, 0); // supervision timeout 5528 event[20] = 0; // master clock accuracy 5529 hci_emit_event(event, sizeof(event), 1); 5530 } 5531 #endif 5532 #endif 5533 5534 static void hci_emit_transport_packet_sent(void){ 5535 // notify upper stack that it might be possible to send again 5536 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5537 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5538 } 5539 5540 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5541 uint8_t event[6]; 5542 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5543 event[1] = sizeof(event) - 2u; 5544 event[2] = 0; // status = OK 5545 little_endian_store_16(event, 3, con_handle); 5546 event[5] = reason; 5547 hci_emit_event(event, sizeof(event), 1); 5548 } 5549 5550 static void hci_emit_nr_connections_changed(void){ 5551 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5552 uint8_t event[3]; 5553 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5554 event[1] = sizeof(event) - 2u; 5555 event[2] = nr_hci_connections(); 5556 hci_emit_event(event, sizeof(event), 1); 5557 } 5558 5559 static void hci_emit_hci_open_failed(void){ 5560 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5561 uint8_t event[2]; 5562 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5563 event[1] = sizeof(event) - 2u; 5564 hci_emit_event(event, sizeof(event), 1); 5565 } 5566 5567 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5568 log_info("hci_emit_dedicated_bonding_result %u ", status); 5569 uint8_t event[9]; 5570 int pos = 0; 5571 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5572 event[pos++] = sizeof(event) - 2u; 5573 event[pos++] = status; 5574 reverse_bd_addr(address, &event[pos]); 5575 hci_emit_event(event, sizeof(event), 1); 5576 } 5577 5578 5579 #ifdef ENABLE_CLASSIC 5580 5581 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5582 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5583 uint8_t event[5]; 5584 int pos = 0; 5585 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5586 event[pos++] = sizeof(event) - 2; 5587 little_endian_store_16(event, 2, con_handle); 5588 pos += 2; 5589 event[pos++] = level; 5590 hci_emit_event(event, sizeof(event), 1); 5591 } 5592 5593 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5594 if (!connection) return LEVEL_0; 5595 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5596 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5597 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5598 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5599 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5600 // LEVEL 4 always requires 128 bit encrytion key size 5601 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5602 security_level = LEVEL_3; 5603 } 5604 return security_level; 5605 } 5606 5607 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5608 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5609 uint8_t event[3]; 5610 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5611 event[1] = sizeof(event) - 2; 5612 event[2] = enabled; 5613 hci_emit_event(event, sizeof(event), 1); 5614 } 5615 5616 // query if remote side supports eSCO 5617 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5618 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5619 if (!connection) return false; 5620 return (connection->remote_supported_features[0] & 1) != 0; 5621 } 5622 5623 static bool hci_ssp_supported(hci_connection_t * connection){ 5624 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5625 return (connection->bonding_flags & mask) == mask; 5626 } 5627 5628 // query if remote side supports SSP 5629 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5630 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5631 if (!connection) return false; 5632 return hci_ssp_supported(connection) ? 1 : 0; 5633 } 5634 5635 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5636 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5637 } 5638 5639 // GAP API 5640 /** 5641 * @bbrief enable/disable bonding. default is enabled 5642 * @praram enabled 5643 */ 5644 void gap_set_bondable_mode(int enable){ 5645 hci_stack->bondable = enable ? 1 : 0; 5646 } 5647 /** 5648 * @brief Get bondable mode. 5649 * @return 1 if bondable 5650 */ 5651 int gap_get_bondable_mode(void){ 5652 return hci_stack->bondable; 5653 } 5654 5655 /** 5656 * @brief map link keys to security levels 5657 */ 5658 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5659 switch (link_key_type){ 5660 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5661 return LEVEL_4; 5662 case COMBINATION_KEY: 5663 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5664 return LEVEL_3; 5665 default: 5666 return LEVEL_2; 5667 } 5668 } 5669 5670 /** 5671 * @brief map link keys to secure connection yes/no 5672 */ 5673 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5674 switch (link_key_type){ 5675 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5676 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5677 return 1; 5678 default: 5679 return 0; 5680 } 5681 } 5682 5683 /** 5684 * @brief map link keys to authenticated 5685 */ 5686 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5687 switch (link_key_type){ 5688 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5689 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5690 return 1; 5691 default: 5692 return 0; 5693 } 5694 } 5695 5696 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5697 log_info("gap_mitm_protection_required_for_security_level %u", level); 5698 return level > LEVEL_2; 5699 } 5700 5701 /** 5702 * @brief get current security level 5703 */ 5704 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5705 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5706 if (!connection) return LEVEL_0; 5707 return gap_security_level_for_connection(connection); 5708 } 5709 5710 /** 5711 * @brief request connection to device to 5712 * @result GAP_AUTHENTICATION_RESULT 5713 */ 5714 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5715 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5716 if (!connection){ 5717 hci_emit_security_level(con_handle, LEVEL_0); 5718 return; 5719 } 5720 5721 btstack_assert(hci_is_le_connection(connection) == false); 5722 5723 // 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) 5724 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5725 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5726 requested_level = LEVEL_4; 5727 } 5728 5729 gap_security_level_t current_level = gap_security_level(con_handle); 5730 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5731 requested_level, connection->requested_security_level, current_level); 5732 5733 // authentication active if authentication request was sent or planned level > 0 5734 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5735 if (authentication_active){ 5736 // authentication already active 5737 if (connection->requested_security_level < requested_level){ 5738 // increase requested level as new level is higher 5739 // TODO: handle re-authentication when done 5740 connection->requested_security_level = requested_level; 5741 } 5742 } else { 5743 // no request active, notify if security sufficient 5744 if (requested_level <= current_level){ 5745 hci_emit_security_level(con_handle, current_level); 5746 return; 5747 } 5748 5749 // store request 5750 connection->requested_security_level = requested_level; 5751 5752 // start to authenticate connection 5753 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5754 hci_run(); 5755 } 5756 } 5757 5758 /** 5759 * @brief start dedicated bonding with device. disconnect after bonding 5760 * @param device 5761 * @param request MITM protection 5762 * @result GAP_DEDICATED_BONDING_COMPLETE 5763 */ 5764 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5765 5766 // create connection state machine 5767 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5768 5769 if (!connection){ 5770 return BTSTACK_MEMORY_ALLOC_FAILED; 5771 } 5772 5773 // delete linkn key 5774 gap_drop_link_key_for_bd_addr(device); 5775 5776 // configure LEVEL_2/3, dedicated bonding 5777 connection->state = SEND_CREATE_CONNECTION; 5778 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5779 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5780 connection->bonding_flags = BONDING_DEDICATED; 5781 5782 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5783 5784 // handle: connnection failure (connection complete != ok) 5785 // handle: authentication failure 5786 // handle: disconnect on done 5787 5788 hci_run(); 5789 5790 return 0; 5791 } 5792 5793 void gap_set_local_name(const char * local_name){ 5794 hci_stack->local_name = local_name; 5795 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5796 // also update EIR if not set by user 5797 if (hci_stack->eir_data == NULL){ 5798 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5799 } 5800 hci_run(); 5801 } 5802 #endif 5803 5804 5805 #ifdef ENABLE_BLE 5806 5807 #ifdef ENABLE_LE_CENTRAL 5808 void gap_start_scan(void){ 5809 hci_stack->le_scanning_enabled = true; 5810 hci_run(); 5811 } 5812 5813 void gap_stop_scan(void){ 5814 hci_stack->le_scanning_enabled = false; 5815 hci_run(); 5816 } 5817 5818 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5819 hci_stack->le_scan_type = scan_type; 5820 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5821 hci_stack->le_scan_interval = scan_interval; 5822 hci_stack->le_scan_window = scan_window; 5823 hci_stack->le_scanning_param_update = true; 5824 hci_run(); 5825 } 5826 5827 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5828 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5829 } 5830 5831 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5832 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5833 if (!conn){ 5834 // disallow if le connection is already outgoing 5835 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5836 log_error("le connection already active"); 5837 return ERROR_CODE_COMMAND_DISALLOWED; 5838 } 5839 5840 log_info("gap_connect: no connection exists yet, creating context"); 5841 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5842 if (!conn){ 5843 // notify client that alloc failed 5844 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5845 log_info("gap_connect: failed to alloc hci_connection_t"); 5846 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5847 } 5848 5849 // set le connecting state 5850 if (hci_is_le_connection_type(addr_type)){ 5851 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5852 } 5853 5854 conn->state = SEND_CREATE_CONNECTION; 5855 log_info("gap_connect: send create connection next"); 5856 hci_run(); 5857 return ERROR_CODE_SUCCESS; 5858 } 5859 5860 if (!hci_is_le_connection(conn) || 5861 (conn->state == SEND_CREATE_CONNECTION) || 5862 (conn->state == SENT_CREATE_CONNECTION)) { 5863 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5864 log_error("gap_connect: classic connection or connect is already being created"); 5865 return GATT_CLIENT_IN_WRONG_STATE; 5866 } 5867 5868 // check if connection was just disconnected 5869 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5870 log_info("gap_connect: send create connection (again)"); 5871 conn->state = SEND_CREATE_CONNECTION; 5872 hci_run(); 5873 return ERROR_CODE_SUCCESS; 5874 } 5875 5876 log_info("gap_connect: context exists with state %u", conn->state); 5877 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5878 hci_run(); 5879 return ERROR_CODE_SUCCESS; 5880 } 5881 5882 // @assumption: only a single outgoing LE Connection exists 5883 static hci_connection_t * gap_get_outgoing_connection(void){ 5884 btstack_linked_item_t *it; 5885 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5886 hci_connection_t * conn = (hci_connection_t *) it; 5887 if (!hci_is_le_connection(conn)) continue; 5888 switch (conn->state){ 5889 case SEND_CREATE_CONNECTION: 5890 case SENT_CREATE_CONNECTION: 5891 case SENT_CANCEL_CONNECTION: 5892 return conn; 5893 default: 5894 break; 5895 }; 5896 } 5897 return NULL; 5898 } 5899 5900 uint8_t gap_connect_cancel(void){ 5901 hci_connection_t * conn = gap_get_outgoing_connection(); 5902 if (!conn) return 0; 5903 switch (conn->state){ 5904 case SEND_CREATE_CONNECTION: 5905 // skip sending create connection and emit event instead 5906 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5907 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5908 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5909 btstack_memory_hci_connection_free( conn ); 5910 break; 5911 case SENT_CREATE_CONNECTION: 5912 // request to send cancel connection 5913 conn->state = SEND_CANCEL_CONNECTION; 5914 hci_run(); 5915 break; 5916 default: 5917 break; 5918 } 5919 return 0; 5920 } 5921 #endif 5922 5923 #ifdef ENABLE_LE_CENTRAL 5924 /** 5925 * @brief Set connection parameters for outgoing connections 5926 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5927 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5928 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5929 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5930 * @param conn_latency, default: 4 5931 * @param supervision_timeout (unit: 10ms), default: 720 ms 5932 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5933 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5934 */ 5935 5936 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5937 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5938 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5939 hci_stack->le_connection_scan_interval = conn_scan_interval; 5940 hci_stack->le_connection_scan_window = conn_scan_window; 5941 hci_stack->le_connection_interval_min = conn_interval_min; 5942 hci_stack->le_connection_interval_max = conn_interval_max; 5943 hci_stack->le_connection_latency = conn_latency; 5944 hci_stack->le_supervision_timeout = supervision_timeout; 5945 hci_stack->le_minimum_ce_length = min_ce_length; 5946 hci_stack->le_maximum_ce_length = max_ce_length; 5947 } 5948 #endif 5949 5950 /** 5951 * @brief Updates the connection parameters for a given LE connection 5952 * @param handle 5953 * @param conn_interval_min (unit: 1.25ms) 5954 * @param conn_interval_max (unit: 1.25ms) 5955 * @param conn_latency 5956 * @param supervision_timeout (unit: 10ms) 5957 * @returns 0 if ok 5958 */ 5959 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5960 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5961 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5962 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5963 connection->le_conn_interval_min = conn_interval_min; 5964 connection->le_conn_interval_max = conn_interval_max; 5965 connection->le_conn_latency = conn_latency; 5966 connection->le_supervision_timeout = supervision_timeout; 5967 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5968 hci_run(); 5969 return 0; 5970 } 5971 5972 /** 5973 * @brief Request an update of the connection parameter for a given LE connection 5974 * @param handle 5975 * @param conn_interval_min (unit: 1.25ms) 5976 * @param conn_interval_max (unit: 1.25ms) 5977 * @param conn_latency 5978 * @param supervision_timeout (unit: 10ms) 5979 * @returns 0 if ok 5980 */ 5981 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5982 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5983 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5984 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5985 connection->le_conn_interval_min = conn_interval_min; 5986 connection->le_conn_interval_max = conn_interval_max; 5987 connection->le_conn_latency = conn_latency; 5988 connection->le_supervision_timeout = supervision_timeout; 5989 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5990 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5991 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5992 return 0; 5993 } 5994 5995 #ifdef ENABLE_LE_PERIPHERAL 5996 5997 /** 5998 * @brief Set Advertisement Data 5999 * @param advertising_data_length 6000 * @param advertising_data (max 31 octets) 6001 * @note data is not copied, pointer has to stay valid 6002 */ 6003 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6004 hci_stack->le_advertisements_data_len = advertising_data_length; 6005 hci_stack->le_advertisements_data = advertising_data; 6006 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6007 hci_run(); 6008 } 6009 6010 /** 6011 * @brief Set Scan Response Data 6012 * @param advertising_data_length 6013 * @param advertising_data (max 31 octets) 6014 * @note data is not copied, pointer has to stay valid 6015 */ 6016 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6017 hci_stack->le_scan_response_data_len = scan_response_data_length; 6018 hci_stack->le_scan_response_data = scan_response_data; 6019 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6020 hci_run(); 6021 } 6022 6023 /** 6024 * @brief Set Advertisement Parameters 6025 * @param adv_int_min 6026 * @param adv_int_max 6027 * @param adv_type 6028 * @param direct_address_type 6029 * @param direct_address 6030 * @param channel_map 6031 * @param filter_policy 6032 * 6033 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6034 */ 6035 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6036 uint8_t direct_address_typ, bd_addr_t direct_address, 6037 uint8_t channel_map, uint8_t filter_policy) { 6038 6039 hci_stack->le_advertisements_interval_min = adv_int_min; 6040 hci_stack->le_advertisements_interval_max = adv_int_max; 6041 hci_stack->le_advertisements_type = adv_type; 6042 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6043 hci_stack->le_advertisements_channel_map = channel_map; 6044 hci_stack->le_advertisements_filter_policy = filter_policy; 6045 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6046 6); 6047 6048 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6049 hci_run(); 6050 } 6051 6052 /** 6053 * @brief Enable/Disable Advertisements 6054 * @param enabled 6055 */ 6056 void gap_advertisements_enable(int enabled){ 6057 hci_stack->le_advertisements_enabled = enabled != 0; 6058 hci_update_advertisements_enabled_for_current_roles(); 6059 hci_run(); 6060 } 6061 6062 #endif 6063 6064 void hci_le_set_own_address_type(uint8_t own_address_type){ 6065 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6066 if (own_address_type == hci_stack->le_own_addr_type) return; 6067 hci_stack->le_own_addr_type = own_address_type; 6068 6069 #ifdef ENABLE_LE_PERIPHERAL 6070 // update advertisement parameters, too 6071 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6072 hci_run(); 6073 #endif 6074 #ifdef ENABLE_LE_CENTRAL 6075 // note: we don't update scan parameters or modify ongoing connection attempts 6076 #endif 6077 } 6078 6079 #endif 6080 6081 uint8_t gap_disconnect(hci_con_handle_t handle){ 6082 hci_connection_t * conn = hci_connection_for_handle(handle); 6083 if (!conn){ 6084 hci_emit_disconnection_complete(handle, 0); 6085 return 0; 6086 } 6087 // ignore if already disconnected 6088 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6089 return 0; 6090 } 6091 conn->state = SEND_DISCONNECT; 6092 hci_run(); 6093 return 0; 6094 } 6095 6096 int gap_read_rssi(hci_con_handle_t con_handle){ 6097 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6098 if (hci_connection == NULL) return 0; 6099 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6100 hci_run(); 6101 return 1; 6102 } 6103 6104 /** 6105 * @brief Get connection type 6106 * @param con_handle 6107 * @result connection_type 6108 */ 6109 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6110 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6111 if (!conn) return GAP_CONNECTION_INVALID; 6112 switch (conn->address_type){ 6113 case BD_ADDR_TYPE_LE_PUBLIC: 6114 case BD_ADDR_TYPE_LE_RANDOM: 6115 return GAP_CONNECTION_LE; 6116 case BD_ADDR_TYPE_SCO: 6117 return GAP_CONNECTION_SCO; 6118 case BD_ADDR_TYPE_ACL: 6119 return GAP_CONNECTION_ACL; 6120 default: 6121 return GAP_CONNECTION_INVALID; 6122 } 6123 } 6124 6125 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6126 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6127 if (!conn) return HCI_ROLE_INVALID; 6128 return (hci_role_t) conn->role; 6129 } 6130 6131 6132 #ifdef ENABLE_CLASSIC 6133 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6134 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6135 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6136 conn->request_role = role; 6137 hci_run(); 6138 return ERROR_CODE_SUCCESS; 6139 } 6140 #endif 6141 6142 #ifdef ENABLE_BLE 6143 6144 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){ 6145 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6146 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6147 6148 conn->le_phy_update_all_phys = all_phys; 6149 conn->le_phy_update_tx_phys = tx_phys; 6150 conn->le_phy_update_rx_phys = rx_phys; 6151 conn->le_phy_update_phy_options = phy_options; 6152 6153 hci_run(); 6154 6155 return 0; 6156 } 6157 6158 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6159 // check if already in list 6160 btstack_linked_list_iterator_t it; 6161 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6162 while (btstack_linked_list_iterator_has_next(&it)) { 6163 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6164 if (entry->address_type != address_type) { 6165 continue; 6166 } 6167 if (memcmp(entry->address, address, 6) != 0) { 6168 continue; 6169 } 6170 // disallow if already scheduled to add 6171 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6172 return ERROR_CODE_COMMAND_DISALLOWED; 6173 } 6174 // still on controller, but scheduled to remove -> re-add 6175 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6176 return ERROR_CODE_SUCCESS; 6177 } 6178 // alloc and add to list 6179 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6180 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6181 entry->address_type = address_type; 6182 (void)memcpy(entry->address, address, 6); 6183 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6184 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6185 return ERROR_CODE_SUCCESS; 6186 } 6187 6188 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6189 btstack_linked_list_iterator_t it; 6190 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6191 while (btstack_linked_list_iterator_has_next(&it)){ 6192 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6193 if (entry->address_type != address_type) { 6194 continue; 6195 } 6196 if (memcmp(entry->address, address, 6) != 0) { 6197 continue; 6198 } 6199 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6200 // remove from controller if already present 6201 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6202 } else { 6203 // directly remove entry from whitelist 6204 btstack_linked_list_iterator_remove(&it); 6205 btstack_memory_whitelist_entry_free(entry); 6206 } 6207 return ERROR_CODE_SUCCESS; 6208 } 6209 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6210 } 6211 6212 static void hci_whitelist_clear(void){ 6213 btstack_linked_list_iterator_t it; 6214 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6215 while (btstack_linked_list_iterator_has_next(&it)){ 6216 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6217 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6218 // remove from controller if already present 6219 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6220 continue; 6221 } 6222 // directly remove entry from whitelist 6223 btstack_linked_list_iterator_remove(&it); 6224 btstack_memory_whitelist_entry_free(entry); 6225 } 6226 } 6227 6228 /** 6229 * @brief Clear Whitelist 6230 * @returns 0 if ok 6231 */ 6232 uint8_t gap_whitelist_clear(void){ 6233 hci_whitelist_clear(); 6234 hci_run(); 6235 return ERROR_CODE_SUCCESS; 6236 } 6237 6238 /** 6239 * @brief Add Device to Whitelist 6240 * @param address_typ 6241 * @param address 6242 * @returns 0 if ok 6243 */ 6244 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6245 uint8_t status = hci_whitelist_add(address_type, address); 6246 if (status){ 6247 return status; 6248 } 6249 hci_run(); 6250 return ERROR_CODE_SUCCESS; 6251 } 6252 6253 /** 6254 * @brief Remove Device from Whitelist 6255 * @param address_typ 6256 * @param address 6257 * @returns 0 if ok 6258 */ 6259 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6260 uint8_t status = hci_whitelist_remove(address_type, address); 6261 if (status){ 6262 return status; 6263 } 6264 hci_run(); 6265 return ERROR_CODE_SUCCESS; 6266 } 6267 6268 #ifdef ENABLE_LE_CENTRAL 6269 /** 6270 * @brief Connect with Whitelist 6271 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6272 * @returns - if ok 6273 */ 6274 uint8_t gap_connect_with_whitelist(void){ 6275 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6276 return ERROR_CODE_COMMAND_DISALLOWED; 6277 } 6278 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6279 hci_run(); 6280 return ERROR_CODE_SUCCESS; 6281 } 6282 6283 /** 6284 * @brief Auto Connection Establishment - Start Connecting to device 6285 * @param address_typ 6286 * @param address 6287 * @returns 0 if ok 6288 */ 6289 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6290 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6291 return ERROR_CODE_COMMAND_DISALLOWED; 6292 } 6293 6294 uint8_t status = hci_whitelist_add(address_type, address); 6295 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6296 return status; 6297 } 6298 6299 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6300 6301 hci_run(); 6302 return ERROR_CODE_SUCCESS; 6303 } 6304 6305 /** 6306 * @brief Auto Connection Establishment - Stop Connecting to device 6307 * @param address_typ 6308 * @param address 6309 * @returns 0 if ok 6310 */ 6311 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6312 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6313 return ERROR_CODE_COMMAND_DISALLOWED; 6314 } 6315 6316 hci_whitelist_remove(address_type, address); 6317 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6318 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6319 } 6320 hci_run(); 6321 return 0; 6322 } 6323 6324 /** 6325 * @brief Auto Connection Establishment - Stop everything 6326 * @note Convenience function to stop all active auto connection attempts 6327 */ 6328 uint8_t gap_auto_connection_stop_all(void){ 6329 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6330 return ERROR_CODE_COMMAND_DISALLOWED; 6331 } 6332 hci_whitelist_clear(); 6333 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6334 hci_run(); 6335 return ERROR_CODE_SUCCESS; 6336 } 6337 6338 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6339 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6340 if (!conn) return 0; 6341 return conn->le_connection_interval; 6342 } 6343 #endif 6344 #endif 6345 6346 #ifdef ENABLE_CLASSIC 6347 /** 6348 * @brief Set Extended Inquiry Response data 6349 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6350 * @note has to be done before stack starts up 6351 */ 6352 void gap_set_extended_inquiry_response(const uint8_t * data){ 6353 hci_stack->eir_data = data; 6354 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6355 hci_run(); 6356 } 6357 6358 /** 6359 * @brief Start GAP Classic Inquiry 6360 * @param duration in 1.28s units 6361 * @return 0 if ok 6362 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6363 */ 6364 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6365 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6366 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6367 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6368 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6369 } 6370 hci_stack->inquiry_state = duration_in_1280ms_units; 6371 hci_run(); 6372 return 0; 6373 } 6374 6375 /** 6376 * @brief Stop GAP Classic Inquiry 6377 * @returns 0 if ok 6378 */ 6379 int gap_inquiry_stop(void){ 6380 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6381 // emit inquiry complete event, before it even started 6382 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6383 hci_emit_event(event, sizeof(event), 1); 6384 return 0; 6385 } 6386 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6387 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6388 hci_run(); 6389 return 0; 6390 } 6391 6392 void gap_inquiry_set_lap(uint32_t lap){ 6393 hci_stack->inquiry_lap = lap; 6394 } 6395 6396 6397 /** 6398 * @brief Remote Name Request 6399 * @param addr 6400 * @param page_scan_repetition_mode 6401 * @param clock_offset only used when bit 15 is set 6402 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6403 */ 6404 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6405 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6406 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6407 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6408 hci_stack->remote_name_clock_offset = clock_offset; 6409 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6410 hci_run(); 6411 return 0; 6412 } 6413 6414 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6415 hci_stack->gap_pairing_state = state; 6416 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6417 hci_run(); 6418 return 0; 6419 } 6420 6421 /** 6422 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6423 * @param addr 6424 * @param pin_data 6425 * @param pin_len 6426 * @return 0 if ok 6427 */ 6428 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6429 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6430 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6431 hci_stack->gap_pairing_pin_len = pin_len; 6432 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6433 } 6434 6435 /** 6436 * @brief Legacy Pairing Pin Code Response 6437 * @param addr 6438 * @param pin 6439 * @return 0 if ok 6440 */ 6441 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6442 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6443 } 6444 6445 /** 6446 * @brief Abort Legacy Pairing 6447 * @param addr 6448 * @param pin 6449 * @return 0 if ok 6450 */ 6451 int gap_pin_code_negative(bd_addr_t addr){ 6452 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6453 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6454 } 6455 6456 /** 6457 * @brief SSP Passkey Response 6458 * @param addr 6459 * @param passkey 6460 * @return 0 if ok 6461 */ 6462 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6463 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6464 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6465 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6466 } 6467 6468 /** 6469 * @brief Abort SSP Passkey Entry/Pairing 6470 * @param addr 6471 * @param pin 6472 * @return 0 if ok 6473 */ 6474 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6475 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6476 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6477 } 6478 6479 /** 6480 * @brief Accept SSP Numeric Comparison 6481 * @param addr 6482 * @param passkey 6483 * @return 0 if ok 6484 */ 6485 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6486 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6487 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6488 } 6489 6490 /** 6491 * @brief Abort SSP Numeric Comparison/Pairing 6492 * @param addr 6493 * @param pin 6494 * @return 0 if ok 6495 */ 6496 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6497 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6498 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6499 } 6500 6501 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6502 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6503 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6504 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6505 connectionSetAuthenticationFlags(conn, flag); 6506 hci_run(); 6507 return ERROR_CODE_SUCCESS; 6508 } 6509 #endif 6510 6511 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6512 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6513 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6514 } 6515 6516 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6517 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6518 } 6519 #endif 6520 6521 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6522 /** 6523 * @brief Report Remote OOB Data 6524 * @param bd_addr 6525 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6526 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6527 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6528 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6529 */ 6530 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){ 6531 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6532 if (connection == NULL) { 6533 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6534 } 6535 connection->classic_oob_c_192 = c_192; 6536 connection->classic_oob_r_192 = r_192; 6537 6538 // ignore P-256 if not supported by us 6539 if (hci_stack->secure_connections_active){ 6540 connection->classic_oob_c_256 = c_256; 6541 connection->classic_oob_r_256 = r_256; 6542 } 6543 6544 return ERROR_CODE_SUCCESS; 6545 } 6546 /** 6547 * @brief Generate new OOB data 6548 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6549 */ 6550 void gap_ssp_generate_oob_data(void){ 6551 hci_stack->classic_read_local_oob_data = true; 6552 hci_run(); 6553 } 6554 6555 #endif 6556 6557 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6558 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6559 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6560 if (connection == NULL) { 6561 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6562 } 6563 6564 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6565 connection->link_key_type = type; 6566 6567 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6568 } 6569 6570 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6571 /** 6572 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6573 * @param inquiry_mode see bluetooth_defines.h 6574 */ 6575 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6576 hci_stack->inquiry_mode = inquiry_mode; 6577 } 6578 6579 /** 6580 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6581 */ 6582 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6583 hci_stack->sco_voice_setting = voice_setting; 6584 } 6585 6586 /** 6587 * @brief Get SCO Voice Setting 6588 * @return current voice setting 6589 */ 6590 uint16_t hci_get_sco_voice_setting(void){ 6591 return hci_stack->sco_voice_setting; 6592 } 6593 6594 static int hci_have_usb_transport(void){ 6595 if (!hci_stack->hci_transport) return 0; 6596 const char * transport_name = hci_stack->hci_transport->name; 6597 if (!transport_name) return 0; 6598 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6599 } 6600 6601 /** @brief Get SCO packet length for current SCO Voice setting 6602 * @note Using SCO packets of the exact length is required for USB transfer 6603 * @return Length of SCO packets in bytes (not audio frames) 6604 */ 6605 uint16_t hci_get_sco_packet_length(void){ 6606 uint16_t sco_packet_length = 0; 6607 6608 #ifdef ENABLE_SCO_OVER_HCI 6609 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6610 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6611 6612 if (hci_have_usb_transport()){ 6613 // see Core Spec for H2 USB Transfer. 6614 // 3 byte SCO header + 24 bytes per connection 6615 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6616 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6617 } else { 6618 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6619 sco_packet_length = 3 + 60 * multiplier; 6620 // assert that it still fits inside an SCO buffer 6621 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6622 sco_packet_length = 3 + 60; 6623 } 6624 } 6625 #endif 6626 6627 #ifdef HAVE_SCO_TRANSPORT 6628 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6629 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6630 sco_packet_length = 3 + 60 * multiplier; 6631 #endif 6632 return sco_packet_length; 6633 } 6634 6635 /** 6636 * @brief Sets the master/slave policy 6637 * @param policy (0: attempt to become master, 1: let connecting device decide) 6638 */ 6639 void hci_set_master_slave_policy(uint8_t policy){ 6640 hci_stack->master_slave_policy = policy; 6641 } 6642 6643 #endif 6644 6645 HCI_STATE hci_get_state(void){ 6646 return hci_stack->state; 6647 } 6648 6649 #ifdef ENABLE_CLASSIC 6650 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6651 hci_stack->gap_classic_accept_callback = accept_callback; 6652 } 6653 #endif 6654 6655 /** 6656 * @brief Set callback for Bluetooth Hardware Error 6657 */ 6658 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6659 hci_stack->hardware_error_callback = fn; 6660 } 6661 6662 void hci_disconnect_all(void){ 6663 btstack_linked_list_iterator_t it; 6664 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6665 while (btstack_linked_list_iterator_has_next(&it)){ 6666 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6667 if (con->state == SENT_DISCONNECT) continue; 6668 con->state = SEND_DISCONNECT; 6669 } 6670 hci_run(); 6671 } 6672 6673 uint16_t hci_get_manufacturer(void){ 6674 return hci_stack->manufacturer; 6675 } 6676 6677 #ifdef ENABLE_BLE 6678 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6679 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6680 if (!hci_con) return NULL; 6681 return &hci_con->sm_connection; 6682 } 6683 6684 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6685 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6686 #endif 6687 6688 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6689 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6690 if (hci_connection == NULL) return 0; 6691 if (hci_is_le_connection(hci_connection)){ 6692 #ifdef ENABLE_BLE 6693 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6694 if (sm_conn->sm_connection_encrypted) { 6695 return sm_conn->sm_actual_encryption_key_size; 6696 } 6697 #endif 6698 } else { 6699 #ifdef ENABLE_CLASSIC 6700 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6701 return hci_connection->encryption_key_size; 6702 } 6703 #endif 6704 } 6705 return 0; 6706 } 6707 6708 int gap_authenticated(hci_con_handle_t con_handle){ 6709 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6710 if (hci_connection == NULL) return 0; 6711 6712 switch (hci_connection->address_type){ 6713 #ifdef ENABLE_BLE 6714 case BD_ADDR_TYPE_LE_PUBLIC: 6715 case BD_ADDR_TYPE_LE_RANDOM: 6716 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6717 return hci_connection->sm_connection.sm_connection_authenticated; 6718 #endif 6719 #ifdef ENABLE_CLASSIC 6720 case BD_ADDR_TYPE_SCO: 6721 case BD_ADDR_TYPE_ACL: 6722 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6723 #endif 6724 default: 6725 return 0; 6726 } 6727 } 6728 6729 int gap_secure_connection(hci_con_handle_t con_handle){ 6730 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6731 if (hci_connection == NULL) return 0; 6732 6733 switch (hci_connection->address_type){ 6734 #ifdef ENABLE_BLE 6735 case BD_ADDR_TYPE_LE_PUBLIC: 6736 case BD_ADDR_TYPE_LE_RANDOM: 6737 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6738 return hci_connection->sm_connection.sm_connection_sc; 6739 #endif 6740 #ifdef ENABLE_CLASSIC 6741 case BD_ADDR_TYPE_SCO: 6742 case BD_ADDR_TYPE_ACL: 6743 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6744 #endif 6745 default: 6746 return 0; 6747 } 6748 } 6749 6750 bool gap_bonded(hci_con_handle_t con_handle){ 6751 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6752 if (hci_connection == NULL) return 0; 6753 6754 #ifdef ENABLE_CLASSIC 6755 link_key_t link_key; 6756 link_key_type_t link_key_type; 6757 #endif 6758 switch (hci_connection->address_type){ 6759 #ifdef ENABLE_BLE 6760 case BD_ADDR_TYPE_LE_PUBLIC: 6761 case BD_ADDR_TYPE_LE_RANDOM: 6762 return hci_connection->sm_connection.sm_le_db_index >= 0; 6763 #endif 6764 #ifdef ENABLE_CLASSIC 6765 case BD_ADDR_TYPE_SCO: 6766 case BD_ADDR_TYPE_ACL: 6767 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6768 #endif 6769 default: 6770 return false; 6771 } 6772 } 6773 6774 #ifdef ENABLE_BLE 6775 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6776 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6777 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6778 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6779 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6780 return sm_conn->sm_connection_authorization_state; 6781 } 6782 #endif 6783 6784 #ifdef ENABLE_CLASSIC 6785 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){ 6786 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6787 if (!conn) return GAP_CONNECTION_INVALID; 6788 conn->sniff_min_interval = sniff_min_interval; 6789 conn->sniff_max_interval = sniff_max_interval; 6790 conn->sniff_attempt = sniff_attempt; 6791 conn->sniff_timeout = sniff_timeout; 6792 hci_run(); 6793 return 0; 6794 } 6795 6796 /** 6797 * @brief Exit Sniff mode 6798 * @param con_handle 6799 @ @return 0 if ok 6800 */ 6801 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6802 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6803 if (!conn) return GAP_CONNECTION_INVALID; 6804 conn->sniff_min_interval = 0xffff; 6805 hci_run(); 6806 return 0; 6807 } 6808 6809 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){ 6810 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6811 if (!conn) return GAP_CONNECTION_INVALID; 6812 conn->sniff_subrating_max_latency = max_latency; 6813 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6814 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6815 hci_run(); 6816 return ERROR_CODE_SUCCESS; 6817 } 6818 6819 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){ 6820 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6821 if (!conn) return GAP_CONNECTION_INVALID; 6822 conn->qos_service_type = service_type; 6823 conn->qos_token_rate = token_rate; 6824 conn->qos_peak_bandwidth = peak_bandwidth; 6825 conn->qos_latency = latency; 6826 conn->qos_delay_variation = delay_variation; 6827 hci_run(); 6828 return ERROR_CODE_SUCCESS; 6829 } 6830 6831 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6832 hci_stack->new_page_scan_interval = page_scan_interval; 6833 hci_stack->new_page_scan_window = page_scan_window; 6834 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6835 hci_run(); 6836 } 6837 6838 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6839 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6840 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6841 hci_run(); 6842 } 6843 6844 #endif 6845 6846 void hci_halting_defer(void){ 6847 if (hci_stack->state != HCI_STATE_HALTING) return; 6848 switch (hci_stack->substate){ 6849 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6850 case HCI_HALTING_CLOSE: 6851 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6852 break; 6853 default: 6854 break; 6855 } 6856 } 6857 6858 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6859 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6860 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6861 if (le_device_db_index >= le_device_db_max_count()) return; 6862 uint8_t offset = le_device_db_index >> 3; 6863 uint8_t mask = 1 << (le_device_db_index & 7); 6864 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6865 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6866 // note: go back to remove entries, otherwise, a remove + add will skip the add 6867 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6868 } 6869 } 6870 6871 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6872 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6873 if (le_device_db_index >= le_device_db_max_count()) return; 6874 uint8_t offset = le_device_db_index >> 3; 6875 uint8_t mask = 1 << (le_device_db_index & 7); 6876 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6877 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6878 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6879 } 6880 } 6881 6882 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6883 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6884 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6885 } 6886 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6887 // restart le resolving list update 6888 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6889 } 6890 return ERROR_CODE_SUCCESS; 6891 } 6892 #endif 6893 6894 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6895 void hci_setup_test_connections_fuzz(void){ 6896 hci_connection_t * conn; 6897 6898 // default address: 66:55:44:33:00:01 6899 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6900 6901 // setup Controller info 6902 hci_stack->num_cmd_packets = 255; 6903 hci_stack->acl_packets_total_num = 255; 6904 6905 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6906 addr[5] = 0x01; 6907 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6908 conn->con_handle = addr[5]; 6909 conn->role = HCI_ROLE_SLAVE; 6910 conn->state = RECEIVED_CONNECTION_REQUEST; 6911 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6912 6913 // setup incoming Classic SCO connection with con handle 0x0002 6914 addr[5] = 0x02; 6915 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6916 conn->con_handle = addr[5]; 6917 conn->role = HCI_ROLE_SLAVE; 6918 conn->state = RECEIVED_CONNECTION_REQUEST; 6919 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6920 6921 // setup ready Classic ACL connection with con handle 0x0003 6922 addr[5] = 0x03; 6923 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6924 conn->con_handle = addr[5]; 6925 conn->role = HCI_ROLE_SLAVE; 6926 conn->state = OPEN; 6927 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6928 6929 // setup ready Classic SCO connection with con handle 0x0004 6930 addr[5] = 0x04; 6931 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6932 conn->con_handle = addr[5]; 6933 conn->role = HCI_ROLE_SLAVE; 6934 conn->state = OPEN; 6935 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6936 6937 // setup ready LE ACL connection with con handle 0x005 and public address 6938 addr[5] = 0x05; 6939 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6940 conn->con_handle = addr[5]; 6941 conn->role = HCI_ROLE_SLAVE; 6942 conn->state = OPEN; 6943 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6944 conn->sm_connection.sm_connection_encrypted = 1; 6945 } 6946 6947 void hci_free_connections_fuzz(void){ 6948 btstack_linked_list_iterator_t it; 6949 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6950 while (btstack_linked_list_iterator_has_next(&it)){ 6951 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6952 btstack_linked_list_iterator_remove(&it); 6953 btstack_memory_hci_connection_free(con); 6954 } 6955 } 6956 void hci_simulate_working_fuzz(void){ 6957 hci_init_done(); 6958 hci_stack->num_cmd_packets = 255; 6959 } 6960 #endif 6961