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 #endif 1317 1318 #ifndef HAVE_HOST_CONTROLLER_API 1319 1320 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1321 if (!hci_stack->config) return 0; 1322 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 // Limit baud rate for Broadcom chipsets to 3 mbps 1324 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1325 baud_rate = 3000000; 1326 } 1327 return baud_rate; 1328 } 1329 1330 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1331 UNUSED(ds); 1332 1333 switch (hci_stack->substate){ 1334 case HCI_INIT_W4_SEND_RESET: 1335 log_info("Resend HCI Reset"); 1336 hci_stack->substate = HCI_INIT_SEND_RESET; 1337 hci_stack->num_cmd_packets = 1; 1338 hci_run(); 1339 break; 1340 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1341 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1342 if (hci_stack->hci_transport->reset_link){ 1343 hci_stack->hci_transport->reset_link(); 1344 } 1345 1346 /* fall through */ 1347 1348 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1349 log_info("Resend HCI Reset - CSR Warm Boot"); 1350 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1351 hci_stack->num_cmd_packets = 1; 1352 hci_run(); 1353 break; 1354 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1355 if (hci_stack->hci_transport->set_baudrate){ 1356 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1357 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1358 hci_stack->hci_transport->set_baudrate(baud_rate); 1359 } 1360 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1361 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1362 if (hci_stack->hci_transport->reset_link){ 1363 log_info("Link Reset"); 1364 hci_stack->hci_transport->reset_link(); 1365 } 1366 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1367 hci_run(); 1368 } 1369 break; 1370 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1371 // otherwise continue 1372 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1373 hci_send_cmd(&hci_read_local_supported_commands); 1374 break; 1375 default: 1376 break; 1377 } 1378 } 1379 #endif 1380 1381 static void hci_initializing_next_state(void){ 1382 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1383 } 1384 1385 // assumption: hci_can_send_command_packet_now() == true 1386 static void hci_initializing_run(void){ 1387 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1388 switch (hci_stack->substate){ 1389 case HCI_INIT_SEND_RESET: 1390 hci_state_reset(); 1391 1392 #ifndef HAVE_HOST_CONTROLLER_API 1393 // prepare reset if command complete not received in 100ms 1394 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1395 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1396 btstack_run_loop_add_timer(&hci_stack->timeout); 1397 #endif 1398 // send command 1399 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1400 hci_send_cmd(&hci_reset); 1401 break; 1402 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1403 hci_send_cmd(&hci_read_local_version_information); 1404 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1405 break; 1406 case HCI_INIT_SEND_READ_LOCAL_NAME: 1407 hci_send_cmd(&hci_read_local_name); 1408 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1409 break; 1410 1411 #ifndef HAVE_HOST_CONTROLLER_API 1412 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1413 hci_state_reset(); 1414 // prepare reset if command complete not received in 100ms 1415 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1416 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1417 btstack_run_loop_add_timer(&hci_stack->timeout); 1418 // send command 1419 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1420 hci_send_cmd(&hci_reset); 1421 break; 1422 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1423 hci_state_reset(); 1424 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1425 hci_send_cmd(&hci_reset); 1426 break; 1427 case HCI_INIT_SEND_BAUD_CHANGE: { 1428 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1429 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1430 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1431 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1432 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1433 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1434 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1435 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1436 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1437 btstack_run_loop_add_timer(&hci_stack->timeout); 1438 } 1439 break; 1440 } 1441 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1442 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1443 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1444 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1445 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1446 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1447 break; 1448 } 1449 case HCI_INIT_CUSTOM_INIT: 1450 // Custom initialization 1451 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1452 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1453 bool send_cmd = false; 1454 switch (hci_stack->chipset_result){ 1455 case BTSTACK_CHIPSET_VALID_COMMAND: 1456 send_cmd = true; 1457 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1458 break; 1459 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1460 send_cmd = true; 1461 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1462 log_info("CSR Warm Boot"); 1463 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1464 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1465 btstack_run_loop_add_timer(&hci_stack->timeout); 1466 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1467 && hci_stack->config 1468 && hci_stack->chipset 1469 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1470 && hci_stack->hci_transport->set_baudrate 1471 && hci_transport_uart_get_main_baud_rate()){ 1472 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1473 } else { 1474 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1475 } 1476 break; 1477 default: 1478 break; 1479 } 1480 1481 if (send_cmd){ 1482 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1483 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1484 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1485 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1486 break; 1487 } 1488 log_info("Init script done"); 1489 1490 // Init script download on Broadcom chipsets causes: 1491 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1492 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1493 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1494 1495 // - baud rate to reset, restore UART baud rate if needed 1496 int need_baud_change = hci_stack->config 1497 && hci_stack->chipset 1498 && hci_stack->chipset->set_baudrate_command 1499 && hci_stack->hci_transport->set_baudrate 1500 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1501 if (need_baud_change) { 1502 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1503 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1504 hci_stack->hci_transport->set_baudrate(baud_rate); 1505 } 1506 1507 uint16_t bcm_delay_ms = 300; 1508 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1509 // -> Work around: wait here. 1510 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1511 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1512 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1513 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1514 btstack_run_loop_add_timer(&hci_stack->timeout); 1515 break; 1516 } 1517 } 1518 // otherwise continue 1519 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1520 hci_send_cmd(&hci_read_local_supported_commands); 1521 break; 1522 case HCI_INIT_SET_BD_ADDR: 1523 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1524 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1525 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1526 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1527 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1528 break; 1529 #endif 1530 1531 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1532 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1533 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1534 hci_send_cmd(&hci_read_local_supported_commands); 1535 break; 1536 case HCI_INIT_READ_BD_ADDR: 1537 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1538 hci_send_cmd(&hci_read_bd_addr); 1539 break; 1540 case HCI_INIT_READ_BUFFER_SIZE: 1541 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1542 hci_send_cmd(&hci_read_buffer_size); 1543 break; 1544 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1545 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1546 hci_send_cmd(&hci_read_local_supported_features); 1547 break; 1548 1549 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1550 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1551 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1552 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1553 break; 1554 case HCI_INIT_HOST_BUFFER_SIZE: 1555 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1556 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1557 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1558 break; 1559 #endif 1560 1561 case HCI_INIT_SET_EVENT_MASK: 1562 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1563 if (hci_le_supported()){ 1564 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1565 } else { 1566 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1567 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1568 } 1569 break; 1570 1571 #ifdef ENABLE_CLASSIC 1572 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1573 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1574 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1575 break; 1576 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1577 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1578 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1579 break; 1580 case HCI_INIT_WRITE_INQUIRY_MODE: 1581 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1582 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1583 break; 1584 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1585 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1586 hci_stack->secure_connections_active = true; 1587 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1588 break; 1589 // only sent if ENABLE_SCO_OVER_HCI is defined 1590 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1591 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1592 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1593 break; 1594 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1595 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1596 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1597 break; 1598 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1599 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1600 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1601 #ifdef ENABLE_SCO_OVER_HCI 1602 log_info("BCM: Route SCO data via HCI transport"); 1603 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1604 #endif 1605 #ifdef ENABLE_SCO_OVER_PCM 1606 log_info("BCM: Route SCO data via PCM interface"); 1607 #ifdef ENABLE_BCM_PCM_WBS 1608 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1609 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1610 #else 1611 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1612 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1613 #endif 1614 #endif 1615 break; 1616 #ifdef ENABLE_SCO_OVER_PCM 1617 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1618 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1619 log_info("BCM: Config PCM interface for I2S"); 1620 #ifdef ENABLE_BCM_PCM_WBS 1621 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1622 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1623 #else 1624 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1625 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1626 #endif 1627 break; 1628 #endif 1629 #endif 1630 1631 #ifdef ENABLE_BLE 1632 // LE INIT 1633 case HCI_INIT_LE_READ_BUFFER_SIZE: 1634 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1635 hci_send_cmd(&hci_le_read_buffer_size); 1636 break; 1637 case HCI_INIT_LE_SET_EVENT_MASK: 1638 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1639 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1640 break; 1641 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1642 // LE Supported Host = 1, Simultaneous Host = 0 1643 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1644 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1645 break; 1646 #endif 1647 1648 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1649 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1650 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1651 hci_send_cmd(&hci_le_read_maximum_data_length); 1652 break; 1653 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1654 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1655 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1656 break; 1657 #endif 1658 1659 #ifdef ENABLE_LE_CENTRAL 1660 case HCI_INIT_READ_WHITE_LIST_SIZE: 1661 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1662 hci_send_cmd(&hci_le_read_white_list_size); 1663 break; 1664 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1665 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1666 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); 1667 break; 1668 #endif 1669 default: 1670 return; 1671 } 1672 } 1673 1674 static void hci_init_done(void){ 1675 // done. tell the app 1676 log_info("hci_init_done -> HCI_STATE_WORKING"); 1677 hci_stack->state = HCI_STATE_WORKING; 1678 hci_emit_state(); 1679 hci_run(); 1680 } 1681 1682 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1683 bool command_completed = false; 1684 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1685 uint16_t opcode = little_endian_read_16(packet,3); 1686 if (opcode == hci_stack->last_cmd_opcode){ 1687 command_completed = true; 1688 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1689 } else { 1690 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1691 } 1692 } 1693 1694 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1695 uint8_t status = packet[2]; 1696 uint16_t opcode = little_endian_read_16(packet,4); 1697 if (opcode == hci_stack->last_cmd_opcode){ 1698 if (status){ 1699 command_completed = true; 1700 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1701 } else { 1702 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1703 } 1704 } else { 1705 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1706 } 1707 } 1708 #ifndef HAVE_HOST_CONTROLLER_API 1709 // Vendor == CSR 1710 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1711 // TODO: track actual command 1712 command_completed = true; 1713 } 1714 1715 // Vendor == Toshiba 1716 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1717 // TODO: track actual command 1718 command_completed = true; 1719 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1720 hci_stack->num_cmd_packets = 1; 1721 } 1722 #endif 1723 1724 return command_completed; 1725 } 1726 1727 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1728 1729 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1730 1731 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1732 1733 #ifndef HAVE_HOST_CONTROLLER_API 1734 1735 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1736 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1737 // 1738 // HCI Reset 1739 // Timeout 100 ms 1740 // HCI Reset 1741 // Command Complete Reset 1742 // HCI Read Local Version Information 1743 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1744 // hang... 1745 // 1746 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1747 if (!command_completed 1748 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1749 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1750 1751 uint16_t opcode = little_endian_read_16(packet,3); 1752 if (opcode == hci_reset.opcode){ 1753 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1754 return; 1755 } 1756 } 1757 1758 // CSR & H5 1759 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1760 if (!command_completed 1761 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1762 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1763 1764 uint16_t opcode = little_endian_read_16(packet,3); 1765 if (opcode == hci_reset.opcode){ 1766 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1767 return; 1768 } 1769 } 1770 1771 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1772 // fix: Correct substate and behave as command below 1773 if (command_completed){ 1774 switch (hci_stack->substate){ 1775 case HCI_INIT_SEND_RESET: 1776 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1777 break; 1778 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1779 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1780 break; 1781 default: 1782 break; 1783 } 1784 } 1785 1786 #endif 1787 1788 if (!command_completed) return; 1789 1790 bool need_baud_change = false; 1791 bool need_addr_change = false; 1792 1793 #ifndef HAVE_HOST_CONTROLLER_API 1794 need_baud_change = hci_stack->config 1795 && hci_stack->chipset 1796 && hci_stack->chipset->set_baudrate_command 1797 && hci_stack->hci_transport->set_baudrate 1798 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1799 1800 need_addr_change = hci_stack->custom_bd_addr_set 1801 && hci_stack->chipset 1802 && hci_stack->chipset->set_bd_addr_command; 1803 #endif 1804 1805 switch(hci_stack->substate){ 1806 1807 #ifndef HAVE_HOST_CONTROLLER_API 1808 case HCI_INIT_SEND_RESET: 1809 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1810 // fix: just correct substate and behave as command below 1811 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1812 btstack_run_loop_remove_timer(&hci_stack->timeout); 1813 break; 1814 case HCI_INIT_W4_SEND_RESET: 1815 btstack_run_loop_remove_timer(&hci_stack->timeout); 1816 break; 1817 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1818 log_info("Received local name, need baud change %d", (int) need_baud_change); 1819 if (need_baud_change){ 1820 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1821 return; 1822 } 1823 // skip baud change 1824 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1825 return; 1826 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1827 // for STLC2500D, baud rate change already happened. 1828 // for others, baud rate gets changed now 1829 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1830 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1831 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1832 hci_stack->hci_transport->set_baudrate(baud_rate); 1833 } 1834 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1835 return; 1836 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1837 btstack_run_loop_remove_timer(&hci_stack->timeout); 1838 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1839 return; 1840 case HCI_INIT_W4_CUSTOM_INIT: 1841 // repeat custom init 1842 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1843 return; 1844 #else 1845 case HCI_INIT_W4_SEND_RESET: 1846 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1847 return ; 1848 #endif 1849 1850 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1851 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1852 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1853 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1854 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1855 return; 1856 } 1857 if (need_addr_change){ 1858 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1859 return; 1860 } 1861 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1862 return; 1863 #ifndef HAVE_HOST_CONTROLLER_API 1864 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1865 if (need_baud_change){ 1866 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1867 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1868 hci_stack->hci_transport->set_baudrate(baud_rate); 1869 } 1870 if (need_addr_change){ 1871 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1872 return; 1873 } 1874 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1875 return; 1876 case HCI_INIT_W4_SET_BD_ADDR: 1877 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1878 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1879 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1880 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1881 return; 1882 } 1883 // skipping st warm boot 1884 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1885 return; 1886 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1887 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1888 return; 1889 #endif 1890 case HCI_INIT_W4_READ_BD_ADDR: 1891 // only read buffer size if supported 1892 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1893 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1894 return; 1895 } 1896 // skipping read buffer size 1897 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1898 return; 1899 case HCI_INIT_W4_SET_EVENT_MASK: 1900 // skip Classic init commands for LE only chipsets 1901 if (!hci_classic_supported()){ 1902 #ifdef ENABLE_BLE 1903 if (hci_le_supported()){ 1904 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1905 return; 1906 } 1907 #endif 1908 log_error("Neither BR/EDR nor LE supported"); 1909 hci_init_done(); 1910 return; 1911 } 1912 if (!gap_ssp_supported()){ 1913 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1914 return; 1915 } 1916 break; 1917 #ifdef ENABLE_BLE 1918 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1919 // skip write le host if not supported (e.g. on LE only EM9301) 1920 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1921 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1922 return; 1923 1924 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1925 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1926 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1927 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1928 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1929 return; 1930 } 1931 // explicit fall through to reduce repetitions 1932 1933 #ifdef ENABLE_LE_CENTRAL 1934 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1935 #else 1936 hci_init_done(); 1937 #endif 1938 return; 1939 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1940 1941 #endif /* ENABLE_BLE */ 1942 1943 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1944 // skip write secure connections host support if not supported or disabled 1945 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1946 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1947 return; 1948 } 1949 break; 1950 1951 #ifdef ENABLE_SCO_OVER_HCI 1952 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1953 // skip write synchronous flow control if not supported 1954 if (hci_stack->local_supported_commands[0] & 0x04) break; 1955 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1956 1957 /* fall through */ 1958 1959 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1960 // skip write default erroneous data reporting if not supported 1961 if (hci_stack->local_supported_commands[0] & 0x08) break; 1962 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1963 1964 /* fall through */ 1965 1966 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1967 // skip bcm set sco pcm config on non-Broadcom chipsets 1968 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1969 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1970 1971 /* fall through */ 1972 1973 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1974 if (!hci_le_supported()){ 1975 // SKIP LE init for Classic only configuration 1976 hci_init_done(); 1977 return; 1978 } 1979 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1980 break; 1981 1982 #else /* !ENABLE_SCO_OVER_HCI */ 1983 1984 case HCI_INIT_W4_WRITE_PAGE_TIMEOUT: 1985 #ifdef ENABLE_SCO_OVER_PCM 1986 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1987 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1988 return; 1989 } 1990 #endif 1991 /* fall through */ 1992 1993 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1994 #ifdef ENABLE_BLE 1995 if (hci_le_supported()){ 1996 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1997 return; 1998 } 1999 #endif 2000 // SKIP LE init for Classic only configuration 2001 hci_init_done(); 2002 return; 2003 #endif /* ENABLE_SCO_OVER_HCI */ 2004 2005 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2006 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2007 // Response to command before init done state -> init done 2008 case (HCI_INIT_DONE-1): 2009 hci_init_done(); 2010 return; 2011 #endif 2012 2013 default: 2014 break; 2015 } 2016 hci_initializing_next_state(); 2017 } 2018 2019 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2020 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2021 bd_addr_t bd_address; 2022 (void)memcpy(&bd_address, conn->address, 6); 2023 2024 #ifdef ENABLE_CLASSIC 2025 // cache needed data 2026 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2027 #endif 2028 2029 // connection failed, remove entry 2030 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2031 btstack_memory_hci_connection_free( conn ); 2032 2033 #ifdef ENABLE_CLASSIC 2034 // notify client if dedicated bonding 2035 if (notify_dedicated_bonding_failed){ 2036 log_info("hci notify_dedicated_bonding_failed"); 2037 hci_emit_dedicated_bonding_result(bd_address, status); 2038 } 2039 2040 // if authentication error, also delete link key 2041 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2042 gap_drop_link_key_for_bd_addr(bd_address); 2043 } 2044 #else 2045 UNUSED(status); 2046 #endif 2047 } 2048 2049 #ifdef ENABLE_CLASSIC 2050 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2051 // SSP Controller 2052 if (features[6] & (1 << 3)){ 2053 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2054 } 2055 // eSCO 2056 if (features[3] & (1<<7)){ 2057 conn->remote_supported_features[0] |= 1; 2058 } 2059 // Extended features 2060 if (features[7] & (1<<7)){ 2061 conn->remote_supported_features[0] |= 2; 2062 } 2063 } 2064 2065 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2066 // SSP Host 2067 if (features[0] & (1 << 0)){ 2068 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2069 } 2070 // SC Host 2071 if (features[0] & (1 << 3)){ 2072 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2073 } 2074 } 2075 2076 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2077 // SC Controller 2078 if (features[1] & (1 << 0)){ 2079 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2080 } 2081 } 2082 2083 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2084 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2085 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2086 if (conn->bonding_flags & BONDING_DEDICATED){ 2087 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2088 } 2089 } 2090 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2091 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2092 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2093 } 2094 2095 #endif 2096 2097 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2098 // handle BT initialization 2099 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2100 hci_initializing_event_handler(packet, size); 2101 } 2102 2103 // help with BT sleep 2104 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2105 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2106 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2107 hci_initializing_next_state(); 2108 } 2109 } 2110 2111 #ifdef ENABLE_CLASSIC 2112 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2113 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2114 conn->encryption_key_size = encryption_key_size; 2115 2116 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2117 conn->requested_security_level = LEVEL_0; 2118 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2119 return; 2120 } 2121 2122 // Request Authentication if not already done 2123 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2124 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2125 } 2126 #endif 2127 2128 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2129 UNUSED(size); 2130 2131 uint16_t manufacturer; 2132 #ifdef ENABLE_CLASSIC 2133 hci_con_handle_t handle; 2134 hci_connection_t * conn; 2135 uint8_t status; 2136 #endif 2137 // get num cmd packets - limit to 1 to reduce complexity 2138 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2139 2140 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2141 switch (opcode){ 2142 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2143 if (packet[5]) break; 2144 // terminate, name 248 chars 2145 packet[6+248] = 0; 2146 log_info("local name: %s", &packet[6]); 2147 break; 2148 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2149 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2150 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2151 uint16_t acl_len = little_endian_read_16(packet, 6); 2152 uint16_t sco_len = packet[8]; 2153 2154 // determine usable ACL/SCO payload size 2155 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2156 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2157 2158 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2159 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2160 2161 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2162 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2163 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2164 } 2165 break; 2166 case HCI_OPCODE_HCI_READ_RSSI: 2167 if (packet[5] == ERROR_CODE_SUCCESS){ 2168 uint8_t event[5]; 2169 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2170 event[1] = 3; 2171 (void)memcpy(&event[2], &packet[6], 3); 2172 hci_emit_event(event, sizeof(event), 1); 2173 } 2174 break; 2175 #ifdef ENABLE_BLE 2176 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2177 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2178 hci_stack->le_acl_packets_total_num = packet[8]; 2179 // determine usable ACL payload size 2180 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2181 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2182 } 2183 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2184 break; 2185 #endif 2186 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2187 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2188 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2189 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2190 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); 2191 break; 2192 #endif 2193 #ifdef ENABLE_LE_CENTRAL 2194 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2195 hci_stack->le_whitelist_capacity = packet[6]; 2196 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2197 break; 2198 #endif 2199 case HCI_OPCODE_HCI_READ_BD_ADDR: 2200 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2201 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)); 2202 #ifdef ENABLE_CLASSIC 2203 if (hci_stack->link_key_db){ 2204 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2205 } 2206 #endif 2207 break; 2208 #ifdef ENABLE_CLASSIC 2209 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2210 hci_emit_discoverable_enabled(hci_stack->discoverable); 2211 break; 2212 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2213 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2214 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2215 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2216 hci_emit_event(event, sizeof(event), 1); 2217 } 2218 break; 2219 #endif 2220 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2221 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2222 2223 #ifdef ENABLE_CLASSIC 2224 // determine usable ACL packet types based on host buffer size and supported features 2225 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2226 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2227 #endif 2228 // Classic/LE 2229 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2230 break; 2231 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2232 manufacturer = little_endian_read_16(packet, 10); 2233 // map Cypress to Broadcom 2234 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2235 log_info("Treat Cypress as Broadcom"); 2236 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2237 little_endian_store_16(packet, 10, manufacturer); 2238 } 2239 hci_stack->manufacturer = manufacturer; 2240 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2241 break; 2242 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2243 hci_stack->local_supported_commands[0] = 2244 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2248 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2249 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2250 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2251 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2252 hci_stack->local_supported_commands[1] = 2253 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2254 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2255 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2256 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2257 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2258 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2259 break; 2260 #ifdef ENABLE_CLASSIC 2261 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2262 if (packet[5]) return; 2263 hci_stack->synchronous_flow_control_enabled = 1; 2264 break; 2265 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2266 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2267 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2268 conn = hci_connection_for_handle(handle); 2269 if (conn != NULL) { 2270 uint8_t key_size = 0; 2271 if (status == 0){ 2272 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2273 log_info("Handle %04x key Size: %u", handle, key_size); 2274 } else { 2275 key_size = 1; 2276 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2277 } 2278 hci_handle_read_encryption_key_size_complete(conn, key_size); 2279 } 2280 break; 2281 // assert pairing complete event is emitted. 2282 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2283 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2284 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2285 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2286 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2287 // lookup connection by gap pairing addr 2288 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2289 if (conn == NULL) break; 2290 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2291 break; 2292 2293 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2294 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2295 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2296 uint8_t event[67]; 2297 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2298 event[1] = 65; 2299 (void)memset(&event[2], 0, 65); 2300 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2301 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2302 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2303 event[2] = 3; 2304 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2305 } else { 2306 event[2] = 1; 2307 } 2308 } 2309 hci_emit_event(event, sizeof(event), 0); 2310 break; 2311 } 2312 2313 // note: only needed if user does not provide OOB data 2314 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2315 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2316 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2317 if (conn == NULL) break; 2318 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2319 break; 2320 #endif 2321 #endif 2322 default: 2323 break; 2324 } 2325 } 2326 2327 #ifdef ENABLE_BLE 2328 static void event_handle_le_connection_complete(const uint8_t * packet){ 2329 bd_addr_t addr; 2330 bd_addr_type_t addr_type; 2331 hci_connection_t * conn; 2332 2333 // Connection management 2334 reverse_bd_addr(&packet[8], addr); 2335 addr_type = (bd_addr_type_t)packet[7]; 2336 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2337 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2338 2339 #ifdef ENABLE_LE_CENTRAL 2340 // handle error: error is reported only to the initiator -> outgoing connection 2341 if (packet[3]){ 2342 2343 // handle cancelled outgoing connection 2344 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2345 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2346 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2347 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2348 // reset state 2349 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2350 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2351 // get outgoing connection conn struct for direct connect 2352 conn = gap_get_outgoing_connection(); 2353 } 2354 2355 // outgoing le connection establishment is done 2356 if (conn){ 2357 // remove entry 2358 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2359 btstack_memory_hci_connection_free( conn ); 2360 } 2361 return; 2362 } 2363 #endif 2364 2365 // on success, both hosts receive connection complete event 2366 if (packet[6] == HCI_ROLE_MASTER){ 2367 #ifdef ENABLE_LE_CENTRAL 2368 // if we're master on an le connection, it was an outgoing connection and we're done with it 2369 // note: no hci_connection_t object exists yet for connect with whitelist 2370 if (hci_is_le_connection_type(addr_type)){ 2371 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2372 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2373 } 2374 #endif 2375 } else { 2376 #ifdef ENABLE_LE_PERIPHERAL 2377 // if we're slave, it was an incoming connection, advertisements have stopped 2378 hci_stack->le_advertisements_active = false; 2379 #endif 2380 } 2381 2382 // LE connections are auto-accepted, so just create a connection if there isn't one already 2383 if (!conn){ 2384 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2385 } 2386 2387 // no memory, sorry. 2388 if (!conn){ 2389 return; 2390 } 2391 2392 conn->state = OPEN; 2393 conn->role = packet[6]; 2394 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2395 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2396 2397 #ifdef ENABLE_LE_PERIPHERAL 2398 if (packet[6] == HCI_ROLE_SLAVE){ 2399 hci_update_advertisements_enabled_for_current_roles(); 2400 } 2401 #endif 2402 2403 // init unenhanced att bearer mtu 2404 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2405 conn->att_connection.mtu_exchanged = false; 2406 2407 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2408 2409 // restart timer 2410 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2411 // btstack_run_loop_add_timer(&conn->timeout); 2412 2413 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2414 2415 hci_emit_nr_connections_changed(); 2416 } 2417 #endif 2418 2419 #ifdef ENABLE_CLASSIC 2420 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){ 2421 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2422 // LEVEL_4 is tested by l2cap 2423 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2424 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2425 if (level >= LEVEL_3){ 2426 // MITM not possible without keyboard or display 2427 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2428 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2429 2430 // MITM possible if one side has keyboard and the other has keyboard or display 2431 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2432 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2433 2434 // MITM not possible if one side has only display and other side has no keyboard 2435 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2436 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2437 } 2438 // LEVEL 2 requires SSP, which is a given 2439 return true; 2440 } 2441 2442 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2443 uint16_t i; 2444 for (i=0; i < size ; i++){ 2445 if (data[i] != 0) { 2446 return false; 2447 } 2448 } 2449 return true; 2450 } 2451 2452 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2453 // get requested security level 2454 gap_security_level_t requested_security_level = conn->requested_security_level; 2455 if (hci_stack->gap_secure_connections_only_mode){ 2456 requested_security_level = LEVEL_4; 2457 } 2458 2459 // assess security: LEVEL 4 requires SC 2460 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2461 if ((requested_security_level == LEVEL_4) && 2462 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2463 !hci_remote_sc_enabled(conn)){ 2464 log_info("Level 4 required, but SC not supported -> abort"); 2465 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2466 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2467 return; 2468 } 2469 2470 // assess security based on io capabilities 2471 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2472 // responder: fully validate io caps of both sides as well as OOB data 2473 bool security_possible = false; 2474 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2475 2476 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2477 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2478 // so we merge the OOB data availability 2479 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2480 if (conn->classic_oob_c_192 != NULL){ 2481 have_oob_data |= 1; 2482 } 2483 if (conn->classic_oob_c_256 != NULL){ 2484 have_oob_data |= 2; 2485 } 2486 // for up to Level 3, either P-192 as well as P-256 will do 2487 // 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 2488 // if remote does not SC, we should not receive P-256 data either 2489 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2490 security_possible = true; 2491 } 2492 // for Level 4, P-256 is needed 2493 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2494 security_possible = true; 2495 } 2496 #endif 2497 2498 if (security_possible == false){ 2499 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2500 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2501 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2502 return; 2503 } 2504 } else { 2505 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2506 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2507 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2508 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2509 log_info("Level 3+ required, but no input/output -> abort"); 2510 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2511 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2512 return; 2513 } 2514 #endif 2515 #endif 2516 } 2517 2518 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2519 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2520 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2521 } else { 2522 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2523 } 2524 #endif 2525 } 2526 2527 #endif 2528 2529 static void event_handler(uint8_t *packet, uint16_t size){ 2530 2531 uint16_t event_length = packet[1]; 2532 2533 // assert packet is complete 2534 if (size != (event_length + 2u)){ 2535 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2536 return; 2537 } 2538 2539 bd_addr_type_t addr_type; 2540 hci_con_handle_t handle; 2541 hci_connection_t * conn; 2542 int i; 2543 int create_connection_cmd; 2544 2545 #ifdef ENABLE_CLASSIC 2546 hci_link_type_t link_type; 2547 bd_addr_t addr; 2548 #endif 2549 2550 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2551 2552 switch (hci_event_packet_get_type(packet)) { 2553 2554 case HCI_EVENT_COMMAND_COMPLETE: 2555 handle_command_complete_event(packet, size); 2556 break; 2557 2558 case HCI_EVENT_COMMAND_STATUS: 2559 // get num cmd packets - limit to 1 to reduce complexity 2560 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2561 2562 // check command status to detected failed outgoing connections 2563 create_connection_cmd = 0; 2564 #ifdef ENABLE_CLASSIC 2565 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2566 create_connection_cmd = 1; 2567 } 2568 #endif 2569 #ifdef ENABLE_LE_CENTRAL 2570 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2571 create_connection_cmd = 1; 2572 } 2573 #endif 2574 if (create_connection_cmd) { 2575 uint8_t status = hci_event_command_status_get_status(packet); 2576 addr_type = hci_stack->outgoing_addr_type; 2577 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2578 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); 2579 2580 // reset outgoing address info 2581 memset(hci_stack->outgoing_addr, 0, 6); 2582 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2583 2584 // on error 2585 if (status != ERROR_CODE_SUCCESS){ 2586 #ifdef ENABLE_LE_CENTRAL 2587 if (hci_is_le_connection_type(addr_type)){ 2588 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2589 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2590 } 2591 #endif 2592 // error => outgoing connection failed 2593 if (conn != NULL){ 2594 hci_handle_connection_failed(conn, status); 2595 } 2596 } 2597 } 2598 2599 #ifdef ENABLE_CLASSIC 2600 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2601 uint8_t status = hci_event_command_status_get_status(packet); 2602 log_info("command status (inquiry), status %x", status); 2603 if (status == ERROR_CODE_SUCCESS) { 2604 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2605 } else { 2606 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2607 } 2608 } 2609 #endif 2610 break; 2611 2612 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2613 if (size < 3) return; 2614 uint16_t num_handles = packet[2]; 2615 if (size != (3u + num_handles * 4u)) return; 2616 uint16_t offset = 3; 2617 for (i=0; i<num_handles;i++){ 2618 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2619 offset += 2u; 2620 uint16_t num_packets = little_endian_read_16(packet, offset); 2621 offset += 2u; 2622 2623 conn = hci_connection_for_handle(handle); 2624 if (!conn){ 2625 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2626 continue; 2627 } 2628 2629 if (conn->num_packets_sent >= num_packets){ 2630 conn->num_packets_sent -= num_packets; 2631 } else { 2632 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2633 conn->num_packets_sent = 0; 2634 } 2635 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2636 2637 #ifdef ENABLE_CLASSIC 2638 // For SCO, we do the can_send_now_check here 2639 hci_notify_if_sco_can_send_now(); 2640 #endif 2641 } 2642 break; 2643 } 2644 2645 #ifdef ENABLE_CLASSIC 2646 case HCI_EVENT_INQUIRY_COMPLETE: 2647 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2648 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2649 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2650 hci_emit_event(event, sizeof(event), 1); 2651 } 2652 break; 2653 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2654 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2655 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2656 } 2657 break; 2658 case HCI_EVENT_CONNECTION_REQUEST: 2659 reverse_bd_addr(&packet[2], addr); 2660 link_type = (hci_link_type_t) packet[11]; 2661 2662 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2663 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2664 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2665 bd_addr_copy(hci_stack->decline_addr, addr); 2666 break; 2667 } 2668 2669 if (hci_stack->gap_classic_accept_callback != NULL){ 2670 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2671 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2672 bd_addr_copy(hci_stack->decline_addr, addr); 2673 break; 2674 } 2675 } 2676 2677 // TODO: eval COD 8-10 2678 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2679 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2680 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2681 if (!conn) { 2682 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2683 } 2684 if (!conn) { 2685 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2686 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2687 bd_addr_copy(hci_stack->decline_addr, addr); 2688 break; 2689 } 2690 conn->role = HCI_ROLE_SLAVE; 2691 conn->state = RECEIVED_CONNECTION_REQUEST; 2692 // store info about eSCO 2693 if (link_type == HCI_LINK_TYPE_ESCO){ 2694 conn->remote_supported_features[0] |= 1; 2695 } 2696 hci_run(); 2697 break; 2698 2699 case HCI_EVENT_CONNECTION_COMPLETE: 2700 // Connection management 2701 reverse_bd_addr(&packet[5], addr); 2702 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2703 addr_type = BD_ADDR_TYPE_ACL; 2704 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2705 if (conn) { 2706 if (!packet[2]){ 2707 conn->state = OPEN; 2708 conn->con_handle = little_endian_read_16(packet, 3); 2709 2710 // queue get remote feature 2711 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2712 2713 // queue set supervision timeout if we're master 2714 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2715 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2716 } 2717 2718 // restart timer 2719 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2720 btstack_run_loop_add_timer(&conn->timeout); 2721 2722 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2723 2724 hci_emit_nr_connections_changed(); 2725 } else { 2726 // connection failed 2727 hci_handle_connection_failed(conn, packet[2]); 2728 } 2729 } 2730 break; 2731 2732 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2733 reverse_bd_addr(&packet[5], addr); 2734 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2735 if (packet[2]){ 2736 // connection failed 2737 break; 2738 } 2739 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2740 if (!conn) { 2741 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2742 } 2743 if (!conn) { 2744 break; 2745 } 2746 conn->state = OPEN; 2747 conn->con_handle = little_endian_read_16(packet, 3); 2748 2749 #ifdef ENABLE_SCO_OVER_HCI 2750 // update SCO 2751 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2752 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2753 } 2754 // trigger can send now 2755 if (hci_have_usb_transport()){ 2756 hci_stack->sco_can_send_now = true; 2757 } 2758 #endif 2759 #ifdef HAVE_SCO_TRANSPORT 2760 // configure sco transport 2761 if (hci_stack->sco_transport != NULL){ 2762 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2763 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2764 } 2765 #endif 2766 break; 2767 2768 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2769 handle = little_endian_read_16(packet, 3); 2770 conn = hci_connection_for_handle(handle); 2771 if (!conn) break; 2772 if (!packet[2]){ 2773 const uint8_t * features = &packet[5]; 2774 hci_handle_remote_features_page_0(conn, features); 2775 2776 // read extended features if possible 2777 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2778 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2779 break; 2780 } 2781 } 2782 hci_handle_remote_features_received(conn); 2783 break; 2784 2785 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2786 handle = little_endian_read_16(packet, 3); 2787 conn = hci_connection_for_handle(handle); 2788 if (!conn) break; 2789 // status = ok, page = 1 2790 if (!packet[2]) { 2791 uint8_t page_number = packet[5]; 2792 uint8_t maximum_page_number = packet[6]; 2793 const uint8_t * features = &packet[7]; 2794 bool done = false; 2795 switch (page_number){ 2796 case 1: 2797 hci_handle_remote_features_page_1(conn, features); 2798 if (maximum_page_number >= 2){ 2799 // get Secure Connections (Controller) from Page 2 if available 2800 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2801 } else { 2802 // otherwise, assume SC (Controller) == SC (Host) 2803 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2804 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2805 } 2806 done = true; 2807 } 2808 break; 2809 case 2: 2810 hci_handle_remote_features_page_2(conn, features); 2811 done = true; 2812 break; 2813 default: 2814 break; 2815 } 2816 if (!done) break; 2817 } 2818 hci_handle_remote_features_received(conn); 2819 break; 2820 2821 case HCI_EVENT_LINK_KEY_REQUEST: 2822 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2823 hci_event_link_key_request_get_bd_addr(packet, addr); 2824 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2825 if (!conn) break; 2826 2827 // lookup link key in db if not cached 2828 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2829 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2830 } 2831 2832 // response sent by hci_run() 2833 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2834 #endif 2835 break; 2836 2837 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2838 hci_event_link_key_request_get_bd_addr(packet, addr); 2839 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2840 if (!conn) break; 2841 2842 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2843 2844 // CVE-2020-26555: ignore NULL link key 2845 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2846 if (btstack_is_null(&packet[8], 16)) break; 2847 2848 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2849 // Change Connection Encryption keeps link key type 2850 if (link_key_type != CHANGED_COMBINATION_KEY){ 2851 conn->link_key_type = link_key_type; 2852 } 2853 2854 // cache link key. link keys stored in little-endian format for legacy reasons 2855 memcpy(&conn->link_key, &packet[8], 16); 2856 2857 // only store link key: 2858 // - if bondable enabled 2859 if (hci_stack->bondable == false) break; 2860 // - if security level sufficient 2861 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2862 // - for SSP, also check if remote side requested bonding as well 2863 if (conn->link_key_type != COMBINATION_KEY){ 2864 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2865 if (!remote_bonding){ 2866 break; 2867 } 2868 } 2869 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2870 break; 2871 } 2872 2873 case HCI_EVENT_PIN_CODE_REQUEST: 2874 hci_event_pin_code_request_get_bd_addr(packet, addr); 2875 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2876 if (!conn) break; 2877 2878 hci_pairing_started(conn, false); 2879 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2880 if (!hci_stack->bondable ){ 2881 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2882 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2883 hci_run(); 2884 return; 2885 } 2886 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2887 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2888 log_info("Level 4 required, but SC not supported -> abort"); 2889 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2890 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2891 hci_run(); 2892 return; 2893 } 2894 break; 2895 2896 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2897 hci_event_io_capability_response_get_bd_addr(packet, addr); 2898 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2899 if (!conn) break; 2900 2901 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2902 hci_pairing_started(conn, true); 2903 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2904 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2905 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2906 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2907 #endif 2908 break; 2909 2910 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2911 hci_event_io_capability_response_get_bd_addr(packet, addr); 2912 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2913 if (!conn) break; 2914 2915 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2916 hci_connection_timestamp(conn); 2917 hci_pairing_started(conn, true); 2918 break; 2919 2920 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2921 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2922 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2923 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2924 if (!conn) break; 2925 2926 hci_connection_timestamp(conn); 2927 2928 hci_pairing_started(conn, true); 2929 2930 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2931 break; 2932 #endif 2933 2934 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2935 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2936 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2937 if (!conn) break; 2938 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2939 if (hci_stack->ssp_auto_accept){ 2940 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2941 }; 2942 } else { 2943 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2944 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2945 // don't forward event to app 2946 hci_run(); 2947 return; 2948 } 2949 break; 2950 2951 case HCI_EVENT_USER_PASSKEY_REQUEST: 2952 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2953 if (hci_stack->ssp_auto_accept){ 2954 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2955 }; 2956 break; 2957 2958 case HCI_EVENT_MODE_CHANGE: 2959 handle = hci_event_mode_change_get_handle(packet); 2960 conn = hci_connection_for_handle(handle); 2961 if (!conn) break; 2962 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2963 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2964 break; 2965 #endif 2966 2967 case HCI_EVENT_ENCRYPTION_CHANGE: 2968 handle = hci_event_encryption_change_get_connection_handle(packet); 2969 conn = hci_connection_for_handle(handle); 2970 if (!conn) break; 2971 if (hci_event_encryption_change_get_status(packet) == 0u) { 2972 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2973 if (encryption_enabled){ 2974 if (hci_is_le_connection(conn)){ 2975 // For LE, we accept connection as encrypted 2976 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2977 } 2978 #ifdef ENABLE_CLASSIC 2979 else { 2980 2981 // dedicated bonding: send result and disconnect 2982 if (conn->bonding_flags & BONDING_DEDICATED){ 2983 conn->bonding_flags &= ~BONDING_DEDICATED; 2984 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2985 conn->bonding_status = packet[2]; 2986 break; 2987 } 2988 2989 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2990 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2991 bool connected_uses_aes_ccm = encryption_enabled == 2; 2992 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2993 log_info("SC during pairing, but only E0 now -> abort"); 2994 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2995 break; 2996 } 2997 2998 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2999 if (connected_uses_aes_ccm){ 3000 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3001 } 3002 3003 #ifdef ENABLE_TESTING_SUPPORT 3004 // work around for issue with PTS dongle 3005 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3006 #endif 3007 3008 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3009 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3010 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3011 } else { 3012 // if not, pretend everything is perfect 3013 hci_handle_read_encryption_key_size_complete(conn, 16); 3014 } 3015 } 3016 #endif 3017 } else { 3018 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3019 } 3020 } 3021 3022 break; 3023 3024 #ifdef ENABLE_CLASSIC 3025 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3026 handle = hci_event_authentication_complete_get_connection_handle(packet); 3027 conn = hci_connection_for_handle(handle); 3028 if (!conn) break; 3029 3030 // clear authentication active flag 3031 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3032 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3033 3034 // authenticated only if auth status == 0 3035 if (hci_event_authentication_complete_get_status(packet) == 0){ 3036 // authenticated 3037 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3038 3039 // If not already encrypted, start encryption 3040 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3041 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3042 break; 3043 } 3044 } 3045 3046 // emit updated security level 3047 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3048 break; 3049 3050 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3051 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3052 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3053 if (!conn) break; 3054 3055 // treat successfully paired connection as authenticated 3056 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3057 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3058 } 3059 3060 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3061 break; 3062 #endif 3063 3064 // HCI_EVENT_DISCONNECTION_COMPLETE 3065 // has been split, to first notify stack before shutting connection down 3066 // see end of function, too. 3067 case HCI_EVENT_DISCONNECTION_COMPLETE: 3068 if (packet[2]) break; // status != 0 3069 handle = little_endian_read_16(packet, 3); 3070 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3071 if (hci_stack->acl_fragmentation_total_size > 0u) { 3072 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3073 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3074 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3075 hci_stack->acl_fragmentation_total_size = 0; 3076 hci_stack->acl_fragmentation_pos = 0; 3077 if (release_buffer){ 3078 hci_release_packet_buffer(); 3079 } 3080 } 3081 } 3082 3083 conn = hci_connection_for_handle(handle); 3084 if (!conn) break; 3085 #ifdef ENABLE_CLASSIC 3086 // pairing failed if it was ongoing 3087 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3088 #endif 3089 3090 // emit dedicatd bonding event 3091 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3092 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3093 } 3094 3095 // mark connection for shutdown, stop timers, reset state 3096 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3097 hci_connection_stop_timer(conn); 3098 hci_connection_init(conn); 3099 3100 #ifdef ENABLE_BLE 3101 #ifdef ENABLE_LE_PERIPHERAL 3102 // re-enable advertisements for le connections if active 3103 if (hci_is_le_connection(conn)){ 3104 hci_update_advertisements_enabled_for_current_roles(); 3105 } 3106 #endif 3107 #endif 3108 break; 3109 3110 case HCI_EVENT_HARDWARE_ERROR: 3111 log_error("Hardware Error: 0x%02x", packet[2]); 3112 if (hci_stack->hardware_error_callback){ 3113 (*hci_stack->hardware_error_callback)(packet[2]); 3114 } else { 3115 // if no special requests, just reboot stack 3116 hci_power_control_off(); 3117 hci_power_control_on(); 3118 } 3119 break; 3120 3121 #ifdef ENABLE_CLASSIC 3122 case HCI_EVENT_ROLE_CHANGE: 3123 if (packet[2]) break; // status != 0 3124 reverse_bd_addr(&packet[3], addr); 3125 addr_type = BD_ADDR_TYPE_ACL; 3126 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3127 if (!conn) break; 3128 conn->role = packet[9]; 3129 break; 3130 #endif 3131 3132 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3133 // release packet buffer only for asynchronous transport and if there are not further fragements 3134 if (hci_transport_synchronous()) { 3135 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3136 return; // instead of break: to avoid re-entering hci_run() 3137 } 3138 hci_stack->acl_fragmentation_tx_active = 0; 3139 if (hci_stack->acl_fragmentation_total_size) break; 3140 hci_release_packet_buffer(); 3141 3142 // L2CAP receives this event via the hci_emit_event below 3143 3144 #ifdef ENABLE_CLASSIC 3145 // For SCO, we do the can_send_now_check here 3146 hci_notify_if_sco_can_send_now(); 3147 #endif 3148 break; 3149 3150 #ifdef ENABLE_CLASSIC 3151 case HCI_EVENT_SCO_CAN_SEND_NOW: 3152 // For SCO, we do the can_send_now_check here 3153 hci_stack->sco_can_send_now = true; 3154 hci_notify_if_sco_can_send_now(); 3155 return; 3156 3157 // explode inquriy results for easier consumption 3158 case HCI_EVENT_INQUIRY_RESULT: 3159 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3160 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3161 gap_inquiry_explode(packet, size); 3162 break; 3163 #endif 3164 3165 #ifdef ENABLE_BLE 3166 case HCI_EVENT_LE_META: 3167 switch (packet[2]){ 3168 #ifdef ENABLE_LE_CENTRAL 3169 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3170 // log_info("advertising report received"); 3171 if (!hci_stack->le_scanning_enabled) break; 3172 le_handle_advertisement_report(packet, size); 3173 break; 3174 #endif 3175 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3176 event_handle_le_connection_complete(packet); 3177 break; 3178 3179 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3180 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3181 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3182 conn = hci_connection_for_handle(handle); 3183 if (!conn) break; 3184 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3185 break; 3186 3187 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3188 // connection 3189 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3190 conn = hci_connection_for_handle(handle); 3191 if (conn) { 3192 // read arguments 3193 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3194 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3195 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3196 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3197 3198 // validate against current connection parameter range 3199 le_connection_parameter_range_t existing_range; 3200 gap_get_connection_parameter_range(&existing_range); 3201 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3202 if (update_parameter){ 3203 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3204 conn->le_conn_interval_min = le_conn_interval_min; 3205 conn->le_conn_interval_max = le_conn_interval_max; 3206 conn->le_conn_latency = le_conn_latency; 3207 conn->le_supervision_timeout = le_supervision_timeout; 3208 } else { 3209 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3210 } 3211 } 3212 break; 3213 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3214 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3215 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3216 conn = hci_connection_for_handle(handle); 3217 if (conn) { 3218 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3219 } 3220 break; 3221 #endif 3222 default: 3223 break; 3224 } 3225 break; 3226 #endif 3227 case HCI_EVENT_VENDOR_SPECIFIC: 3228 // Vendor specific commands often create vendor specific event instead of num completed packets 3229 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3230 switch (hci_stack->manufacturer){ 3231 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3232 hci_stack->num_cmd_packets = 1; 3233 break; 3234 default: 3235 break; 3236 } 3237 break; 3238 default: 3239 break; 3240 } 3241 3242 handle_event_for_current_stack_state(packet, size); 3243 3244 // notify upper stack 3245 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3246 3247 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3248 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3249 handle = little_endian_read_16(packet, 3); 3250 hci_connection_t * aConn = hci_connection_for_handle(handle); 3251 // discard connection if app did not trigger a reconnect in the event handler 3252 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3253 hci_shutdown_connection(aConn); 3254 } 3255 } 3256 3257 // execute main loop 3258 hci_run(); 3259 } 3260 3261 #ifdef ENABLE_CLASSIC 3262 3263 #ifdef ENABLE_SCO_OVER_HCI 3264 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3265 static void sco_schedule_tx(hci_connection_t * conn); 3266 3267 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3268 log_debug("SCO TX Timeout"); 3269 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3270 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3271 if (!conn) return; 3272 3273 // trigger send 3274 conn->sco_tx_ready = 1; 3275 // extra packet if CVSD but SCO buffer is too short 3276 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3277 conn->sco_tx_ready++; 3278 } 3279 hci_notify_if_sco_can_send_now(); 3280 } 3281 3282 3283 #define SCO_TX_AFTER_RX_MS (6) 3284 3285 static void sco_schedule_tx(hci_connection_t * conn){ 3286 3287 uint32_t now = btstack_run_loop_get_time_ms(); 3288 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3289 int time_delta_ms = sco_tx_ms - now; 3290 3291 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3292 3293 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3294 btstack_run_loop_remove_timer(timer); 3295 btstack_run_loop_set_timer(timer, time_delta_ms); 3296 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3297 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3298 btstack_run_loop_add_timer(timer); 3299 } 3300 #endif 3301 3302 static void sco_handler(uint8_t * packet, uint16_t size){ 3303 // lookup connection struct 3304 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3305 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3306 if (!conn) return; 3307 3308 #ifdef ENABLE_SCO_OVER_HCI 3309 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3310 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3311 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3312 packet[2] = 0x3c; 3313 memmove(&packet[3], &packet[23], 63); 3314 size = 63; 3315 } 3316 } 3317 3318 if (hci_have_usb_transport()){ 3319 // Nothing to do 3320 } else { 3321 // 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); 3322 if (hci_stack->synchronous_flow_control_enabled == 0){ 3323 uint32_t now = btstack_run_loop_get_time_ms(); 3324 3325 if (!conn->sco_rx_valid){ 3326 // ignore first 10 packets 3327 conn->sco_rx_count++; 3328 // log_debug("sco rx count %u", conn->sco_rx_count); 3329 if (conn->sco_rx_count == 10) { 3330 // use first timestamp as is and pretent it just started 3331 conn->sco_rx_ms = now; 3332 conn->sco_rx_valid = 1; 3333 conn->sco_rx_count = 0; 3334 sco_schedule_tx(conn); 3335 } 3336 } else { 3337 // track expected arrival timme 3338 conn->sco_rx_count++; 3339 conn->sco_rx_ms += 7; 3340 int delta = (int32_t) (now - conn->sco_rx_ms); 3341 if (delta > 0){ 3342 conn->sco_rx_ms++; 3343 } 3344 // log_debug("sco rx %u", conn->sco_rx_ms); 3345 sco_schedule_tx(conn); 3346 } 3347 } 3348 } 3349 #endif 3350 3351 // deliver to app 3352 if (hci_stack->sco_packet_handler) { 3353 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3354 } 3355 3356 #ifdef HAVE_SCO_TRANSPORT 3357 // We can send one packet for each received packet 3358 conn->sco_tx_ready++; 3359 hci_notify_if_sco_can_send_now(); 3360 #endif 3361 3362 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3363 conn->num_packets_completed++; 3364 hci_stack->host_completed_packets = 1; 3365 hci_run(); 3366 #endif 3367 } 3368 #endif 3369 3370 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3371 hci_dump_packet(packet_type, 1, packet, size); 3372 switch (packet_type) { 3373 case HCI_EVENT_PACKET: 3374 event_handler(packet, size); 3375 break; 3376 case HCI_ACL_DATA_PACKET: 3377 acl_handler(packet, size); 3378 break; 3379 #ifdef ENABLE_CLASSIC 3380 case HCI_SCO_DATA_PACKET: 3381 sco_handler(packet, size); 3382 break; 3383 #endif 3384 default: 3385 break; 3386 } 3387 } 3388 3389 /** 3390 * @brief Add event packet handler. 3391 */ 3392 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3393 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3394 } 3395 3396 3397 /** Register HCI packet handlers */ 3398 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3399 hci_stack->acl_packet_handler = handler; 3400 } 3401 3402 #ifdef ENABLE_CLASSIC 3403 /** 3404 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3405 */ 3406 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3407 hci_stack->sco_packet_handler = handler; 3408 } 3409 #endif 3410 3411 static void hci_state_reset(void){ 3412 // no connections yet 3413 hci_stack->connections = NULL; 3414 3415 // keep discoverable/connectable as this has been requested by the client(s) 3416 // hci_stack->discoverable = 0; 3417 // hci_stack->connectable = 0; 3418 // hci_stack->bondable = 1; 3419 // hci_stack->own_addr_type = 0; 3420 3421 // buffer is free 3422 hci_stack->hci_packet_buffer_reserved = false; 3423 3424 // no pending cmds 3425 hci_stack->decline_reason = 0; 3426 3427 hci_stack->secure_connections_active = false; 3428 3429 #ifdef ENABLE_CLASSIC 3430 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3431 hci_stack->gap_tasks = 3432 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3433 GAP_TASK_SET_CLASS_OF_DEVICE | 3434 GAP_TASK_SET_LOCAL_NAME | 3435 GAP_TASK_SET_EIR_DATA | 3436 GAP_TASK_WRITE_SCAN_ENABLE; 3437 #endif 3438 3439 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3440 hci_stack->classic_read_local_oob_data = true; 3441 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3442 #endif 3443 3444 // LE 3445 #ifdef ENABLE_BLE 3446 memset(hci_stack->le_random_address, 0, 6); 3447 hci_stack->le_random_address_set = 0; 3448 #endif 3449 #ifdef ENABLE_LE_CENTRAL 3450 hci_stack->le_scanning_active = false; 3451 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3452 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3453 hci_stack->le_whitelist_capacity = 0; 3454 #endif 3455 #ifdef ENABLE_LE_PERIPHERAL 3456 hci_stack->le_advertisements_active = false; 3457 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3458 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3459 } 3460 if (hci_stack->le_advertisements_data != NULL){ 3461 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3462 } 3463 #endif 3464 } 3465 3466 #ifdef ENABLE_CLASSIC 3467 /** 3468 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3469 */ 3470 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3471 // store and open remote device db 3472 hci_stack->link_key_db = link_key_db; 3473 if (hci_stack->link_key_db) { 3474 hci_stack->link_key_db->open(); 3475 } 3476 } 3477 #endif 3478 3479 void hci_init(const hci_transport_t *transport, const void *config){ 3480 3481 #ifdef HAVE_MALLOC 3482 if (!hci_stack) { 3483 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3484 } 3485 #else 3486 hci_stack = &hci_stack_static; 3487 #endif 3488 memset(hci_stack, 0, sizeof(hci_stack_t)); 3489 3490 // reference to use transport layer implementation 3491 hci_stack->hci_transport = transport; 3492 3493 // reference to used config 3494 hci_stack->config = config; 3495 3496 // setup pointer for outgoing packet buffer 3497 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3498 3499 // max acl payload size defined in config.h 3500 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3501 3502 // register packet handlers with transport 3503 transport->register_packet_handler(&packet_handler); 3504 3505 hci_stack->state = HCI_STATE_OFF; 3506 3507 // class of device 3508 hci_stack->class_of_device = 0x007a020c; // Smartphone 3509 3510 // bondable by default 3511 hci_stack->bondable = 1; 3512 3513 #ifdef ENABLE_CLASSIC 3514 // classic name 3515 hci_stack->local_name = default_classic_name; 3516 3517 // Master slave policy 3518 hci_stack->master_slave_policy = 1; 3519 3520 // Allow Role Switch 3521 hci_stack->allow_role_switch = 1; 3522 3523 // Default / minimum security level = 2 3524 hci_stack->gap_security_level = LEVEL_2; 3525 3526 // Default Security Mode 4 3527 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3528 3529 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3530 hci_stack->gap_required_encyrption_key_size = 7; 3531 3532 // Link Supervision Timeout 3533 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3534 3535 #endif 3536 3537 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3538 hci_stack->ssp_enable = 1; 3539 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3540 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3541 hci_stack->ssp_auto_accept = 1; 3542 3543 // Secure Connections: enable (requires support from Controller) 3544 hci_stack->secure_connections_enable = true; 3545 3546 // voice setting - signed 16 bit pcm data with CVSD over the air 3547 hci_stack->sco_voice_setting = 0x60; 3548 3549 #ifdef ENABLE_LE_CENTRAL 3550 // connection parameter to use for outgoing connections 3551 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3552 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3553 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3554 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3555 hci_stack->le_connection_latency = 4; // 4 3556 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3557 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3558 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3559 3560 // default LE Scanning 3561 hci_stack->le_scan_type = 0x1; // active 3562 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3563 hci_stack->le_scan_window = 0x30; // 30 ms 3564 #endif 3565 3566 #ifdef ENABLE_LE_PERIPHERAL 3567 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3568 #endif 3569 3570 // connection parameter range used to answer connection parameter update requests in l2cap 3571 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3572 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3573 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3574 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3575 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3576 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3577 3578 hci_state_reset(); 3579 } 3580 3581 void hci_deinit(void){ 3582 #ifdef HAVE_MALLOC 3583 if (hci_stack) { 3584 free(hci_stack); 3585 } 3586 #endif 3587 hci_stack = NULL; 3588 3589 #ifdef ENABLE_CLASSIC 3590 disable_l2cap_timeouts = 0; 3591 #endif 3592 } 3593 3594 /** 3595 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3596 */ 3597 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3598 hci_stack->chipset = chipset_driver; 3599 3600 // reset chipset driver - init is also called on power_up 3601 if (hci_stack->chipset && hci_stack->chipset->init){ 3602 hci_stack->chipset->init(hci_stack->config); 3603 } 3604 } 3605 3606 /** 3607 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3608 */ 3609 void hci_set_control(const btstack_control_t *hardware_control){ 3610 // references to used control implementation 3611 hci_stack->control = hardware_control; 3612 // init with transport config 3613 hardware_control->init(hci_stack->config); 3614 } 3615 3616 void hci_close(void){ 3617 3618 #ifdef ENABLE_CLASSIC 3619 // close remote device db 3620 if (hci_stack->link_key_db) { 3621 hci_stack->link_key_db->close(); 3622 } 3623 #endif 3624 3625 btstack_linked_list_iterator_t lit; 3626 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3627 while (btstack_linked_list_iterator_has_next(&lit)){ 3628 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3629 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3630 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3631 hci_shutdown_connection(connection); 3632 } 3633 3634 hci_power_control(HCI_POWER_OFF); 3635 3636 #ifdef HAVE_MALLOC 3637 free(hci_stack); 3638 #endif 3639 hci_stack = NULL; 3640 } 3641 3642 #ifdef HAVE_SCO_TRANSPORT 3643 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3644 hci_stack->sco_transport = sco_transport; 3645 sco_transport->register_packet_handler(&packet_handler); 3646 } 3647 #endif 3648 3649 #ifdef ENABLE_CLASSIC 3650 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3651 // validate ranage and set 3652 if (encryption_key_size < 7) return; 3653 if (encryption_key_size > 16) return; 3654 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3655 } 3656 3657 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3658 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3659 hci_stack->gap_security_mode = security_mode; 3660 return ERROR_CODE_SUCCESS; 3661 } else { 3662 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3663 } 3664 } 3665 3666 gap_security_mode_t gap_get_security_mode(void){ 3667 return hci_stack->gap_security_mode; 3668 } 3669 3670 void gap_set_security_level(gap_security_level_t security_level){ 3671 hci_stack->gap_security_level = security_level; 3672 } 3673 3674 gap_security_level_t gap_get_security_level(void){ 3675 if (hci_stack->gap_secure_connections_only_mode){ 3676 return LEVEL_4; 3677 } 3678 return hci_stack->gap_security_level; 3679 } 3680 3681 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3682 hci_stack->gap_minimal_service_security_level = security_level; 3683 } 3684 3685 void gap_set_secure_connections_only_mode(bool enable){ 3686 hci_stack->gap_secure_connections_only_mode = enable; 3687 } 3688 3689 bool gap_get_secure_connections_only_mode(void){ 3690 return hci_stack->gap_secure_connections_only_mode; 3691 } 3692 #endif 3693 3694 #ifdef ENABLE_CLASSIC 3695 void gap_set_class_of_device(uint32_t class_of_device){ 3696 hci_stack->class_of_device = class_of_device; 3697 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3698 hci_run(); 3699 } 3700 3701 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3702 hci_stack->default_link_policy_settings = default_link_policy_settings; 3703 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3704 hci_run(); 3705 } 3706 3707 void gap_set_allow_role_switch(bool allow_role_switch){ 3708 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3709 } 3710 3711 uint8_t hci_get_allow_role_switch(void){ 3712 return hci_stack->allow_role_switch; 3713 } 3714 3715 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3716 hci_stack->link_supervision_timeout = link_supervision_timeout; 3717 } 3718 3719 void hci_disable_l2cap_timeout_check(void){ 3720 disable_l2cap_timeouts = 1; 3721 } 3722 #endif 3723 3724 #ifndef HAVE_HOST_CONTROLLER_API 3725 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3726 void hci_set_bd_addr(bd_addr_t addr){ 3727 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3728 hci_stack->custom_bd_addr_set = 1; 3729 } 3730 #endif 3731 3732 // State-Module-Driver overview 3733 // state module low-level 3734 // HCI_STATE_OFF off close 3735 // HCI_STATE_INITIALIZING, on open 3736 // HCI_STATE_WORKING, on open 3737 // HCI_STATE_HALTING, on open 3738 // HCI_STATE_SLEEPING, off/sleep close 3739 // HCI_STATE_FALLING_ASLEEP on open 3740 3741 static int hci_power_control_on(void){ 3742 3743 // power on 3744 int err = 0; 3745 if (hci_stack->control && hci_stack->control->on){ 3746 err = (*hci_stack->control->on)(); 3747 } 3748 if (err){ 3749 log_error( "POWER_ON failed"); 3750 hci_emit_hci_open_failed(); 3751 return err; 3752 } 3753 3754 // int chipset driver 3755 if (hci_stack->chipset && hci_stack->chipset->init){ 3756 hci_stack->chipset->init(hci_stack->config); 3757 } 3758 3759 // init transport 3760 if (hci_stack->hci_transport->init){ 3761 hci_stack->hci_transport->init(hci_stack->config); 3762 } 3763 3764 // open transport 3765 err = hci_stack->hci_transport->open(); 3766 if (err){ 3767 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3768 if (hci_stack->control && hci_stack->control->off){ 3769 (*hci_stack->control->off)(); 3770 } 3771 hci_emit_hci_open_failed(); 3772 return err; 3773 } 3774 return 0; 3775 } 3776 3777 static void hci_power_control_off(void){ 3778 3779 log_info("hci_power_control_off"); 3780 3781 // close low-level device 3782 hci_stack->hci_transport->close(); 3783 3784 log_info("hci_power_control_off - hci_transport closed"); 3785 3786 // power off 3787 if (hci_stack->control && hci_stack->control->off){ 3788 (*hci_stack->control->off)(); 3789 } 3790 3791 log_info("hci_power_control_off - control closed"); 3792 3793 hci_stack->state = HCI_STATE_OFF; 3794 } 3795 3796 static void hci_power_control_sleep(void){ 3797 3798 log_info("hci_power_control_sleep"); 3799 3800 #if 0 3801 // don't close serial port during sleep 3802 3803 // close low-level device 3804 hci_stack->hci_transport->close(hci_stack->config); 3805 #endif 3806 3807 // sleep mode 3808 if (hci_stack->control && hci_stack->control->sleep){ 3809 (*hci_stack->control->sleep)(); 3810 } 3811 3812 hci_stack->state = HCI_STATE_SLEEPING; 3813 } 3814 3815 static int hci_power_control_wake(void){ 3816 3817 log_info("hci_power_control_wake"); 3818 3819 // wake on 3820 if (hci_stack->control && hci_stack->control->wake){ 3821 (*hci_stack->control->wake)(); 3822 } 3823 3824 #if 0 3825 // open low-level device 3826 int err = hci_stack->hci_transport->open(hci_stack->config); 3827 if (err){ 3828 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3829 if (hci_stack->control && hci_stack->control->off){ 3830 (*hci_stack->control->off)(); 3831 } 3832 hci_emit_hci_open_failed(); 3833 return err; 3834 } 3835 #endif 3836 3837 return 0; 3838 } 3839 3840 static void hci_power_transition_to_initializing(void){ 3841 // set up state machine 3842 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3843 hci_stack->hci_packet_buffer_reserved = false; 3844 hci_stack->state = HCI_STATE_INITIALIZING; 3845 hci_stack->substate = HCI_INIT_SEND_RESET; 3846 } 3847 3848 // returns error 3849 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3850 int err; 3851 switch (power_mode){ 3852 case HCI_POWER_ON: 3853 err = hci_power_control_on(); 3854 if (err != 0) { 3855 log_error("hci_power_control_on() error %d", err); 3856 return err; 3857 } 3858 hci_power_transition_to_initializing(); 3859 break; 3860 case HCI_POWER_OFF: 3861 // do nothing 3862 break; 3863 case HCI_POWER_SLEEP: 3864 // do nothing (with SLEEP == OFF) 3865 break; 3866 default: 3867 btstack_assert(false); 3868 break; 3869 } 3870 return ERROR_CODE_SUCCESS; 3871 } 3872 3873 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3874 switch (power_mode){ 3875 case HCI_POWER_ON: 3876 // do nothing 3877 break; 3878 case HCI_POWER_OFF: 3879 // no connections yet, just turn it off 3880 hci_power_control_off(); 3881 break; 3882 case HCI_POWER_SLEEP: 3883 // no connections yet, just turn it off 3884 hci_power_control_sleep(); 3885 break; 3886 default: 3887 btstack_assert(false); 3888 break; 3889 } 3890 return ERROR_CODE_SUCCESS; 3891 } 3892 3893 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3894 switch (power_mode){ 3895 case HCI_POWER_ON: 3896 // do nothing 3897 break; 3898 case HCI_POWER_OFF: 3899 // see hci_run 3900 hci_stack->state = HCI_STATE_HALTING; 3901 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3902 break; 3903 case HCI_POWER_SLEEP: 3904 // see hci_run 3905 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3906 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3907 break; 3908 default: 3909 btstack_assert(false); 3910 break; 3911 } 3912 return ERROR_CODE_SUCCESS; 3913 } 3914 3915 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3916 switch (power_mode){ 3917 case HCI_POWER_ON: 3918 hci_power_transition_to_initializing(); 3919 break; 3920 case HCI_POWER_OFF: 3921 // do nothing 3922 break; 3923 case HCI_POWER_SLEEP: 3924 // see hci_run 3925 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3926 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3927 break; 3928 default: 3929 btstack_assert(false); 3930 break; 3931 } 3932 return ERROR_CODE_SUCCESS; 3933 } 3934 3935 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3936 switch (power_mode){ 3937 case HCI_POWER_ON: 3938 hci_power_transition_to_initializing(); 3939 break; 3940 case HCI_POWER_OFF: 3941 // see hci_run 3942 hci_stack->state = HCI_STATE_HALTING; 3943 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3944 break; 3945 case HCI_POWER_SLEEP: 3946 // do nothing 3947 break; 3948 default: 3949 btstack_assert(false); 3950 break; 3951 } 3952 return ERROR_CODE_SUCCESS; 3953 } 3954 3955 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3956 int err; 3957 switch (power_mode){ 3958 case HCI_POWER_ON: 3959 err = hci_power_control_wake(); 3960 if (err) return err; 3961 hci_power_transition_to_initializing(); 3962 break; 3963 case HCI_POWER_OFF: 3964 hci_stack->state = HCI_STATE_HALTING; 3965 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3966 break; 3967 case HCI_POWER_SLEEP: 3968 // do nothing 3969 break; 3970 default: 3971 btstack_assert(false); 3972 break; 3973 } 3974 return ERROR_CODE_SUCCESS; 3975 } 3976 3977 int hci_power_control(HCI_POWER_MODE power_mode){ 3978 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3979 int err = 0; 3980 switch (hci_stack->state){ 3981 case HCI_STATE_OFF: 3982 err = hci_power_control_state_off(power_mode); 3983 break; 3984 case HCI_STATE_INITIALIZING: 3985 err = hci_power_control_state_initializing(power_mode); 3986 break; 3987 case HCI_STATE_WORKING: 3988 err = hci_power_control_state_working(power_mode); 3989 break; 3990 case HCI_STATE_HALTING: 3991 err = hci_power_control_state_halting(power_mode); 3992 break; 3993 case HCI_STATE_FALLING_ASLEEP: 3994 err = hci_power_control_state_falling_asleep(power_mode); 3995 break; 3996 case HCI_STATE_SLEEPING: 3997 err = hci_power_control_state_sleeping(power_mode); 3998 break; 3999 default: 4000 btstack_assert(false); 4001 break; 4002 } 4003 if (err != 0){ 4004 return err; 4005 } 4006 4007 // create internal event 4008 hci_emit_state(); 4009 4010 // trigger next/first action 4011 hci_run(); 4012 4013 return 0; 4014 } 4015 4016 4017 #ifdef ENABLE_CLASSIC 4018 4019 static void hci_update_scan_enable(void){ 4020 // 2 = page scan, 1 = inq scan 4021 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4022 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4023 hci_run(); 4024 } 4025 4026 void gap_discoverable_control(uint8_t enable){ 4027 if (enable) enable = 1; // normalize argument 4028 4029 if (hci_stack->discoverable == enable){ 4030 hci_emit_discoverable_enabled(hci_stack->discoverable); 4031 return; 4032 } 4033 4034 hci_stack->discoverable = enable; 4035 hci_update_scan_enable(); 4036 } 4037 4038 void gap_connectable_control(uint8_t enable){ 4039 if (enable) enable = 1; // normalize argument 4040 4041 // don't emit event 4042 if (hci_stack->connectable == enable) return; 4043 4044 hci_stack->connectable = enable; 4045 hci_update_scan_enable(); 4046 } 4047 #endif 4048 4049 void gap_local_bd_addr(bd_addr_t address_buffer){ 4050 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4051 } 4052 4053 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4054 static void hci_host_num_completed_packets(void){ 4055 4056 // create packet manually as arrays are not supported and num_commands should not get reduced 4057 hci_reserve_packet_buffer(); 4058 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4059 4060 uint16_t size = 0; 4061 uint16_t num_handles = 0; 4062 packet[size++] = 0x35; 4063 packet[size++] = 0x0c; 4064 size++; // skip param len 4065 size++; // skip num handles 4066 4067 // add { handle, packets } entries 4068 btstack_linked_item_t * it; 4069 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4070 hci_connection_t * connection = (hci_connection_t *) it; 4071 if (connection->num_packets_completed){ 4072 little_endian_store_16(packet, size, connection->con_handle); 4073 size += 2; 4074 little_endian_store_16(packet, size, connection->num_packets_completed); 4075 size += 2; 4076 // 4077 num_handles++; 4078 connection->num_packets_completed = 0; 4079 } 4080 } 4081 4082 packet[2] = size - 3; 4083 packet[3] = num_handles; 4084 4085 hci_stack->host_completed_packets = 0; 4086 4087 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4088 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4089 4090 // release packet buffer for synchronous transport implementations 4091 if (hci_transport_synchronous()){ 4092 hci_release_packet_buffer(); 4093 hci_emit_transport_packet_sent(); 4094 } 4095 } 4096 #endif 4097 4098 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4099 UNUSED(ds); 4100 hci_stack->substate = HCI_HALTING_CLOSE; 4101 // allow packet handlers to defer final shutdown 4102 hci_emit_state(); 4103 hci_run(); 4104 } 4105 4106 static bool hci_run_acl_fragments(void){ 4107 if (hci_stack->acl_fragmentation_total_size > 0u) { 4108 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4109 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4110 if (connection) { 4111 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4112 hci_send_acl_packet_fragments(connection); 4113 return true; 4114 } 4115 } else { 4116 // connection gone -> discard further fragments 4117 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4118 hci_stack->acl_fragmentation_total_size = 0; 4119 hci_stack->acl_fragmentation_pos = 0; 4120 } 4121 } 4122 return false; 4123 } 4124 4125 #ifdef ENABLE_CLASSIC 4126 static bool hci_run_general_gap_classic(void){ 4127 4128 // assert stack is working and classic is active 4129 if (hci_classic_supported() == false) return false; 4130 if (hci_stack->state != HCI_STATE_WORKING) return false; 4131 4132 // decline incoming connections 4133 if (hci_stack->decline_reason){ 4134 uint8_t reason = hci_stack->decline_reason; 4135 hci_stack->decline_reason = 0; 4136 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4137 return true; 4138 } 4139 4140 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4141 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4142 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4143 return true; 4144 } 4145 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4146 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4147 gap_run_set_local_name(); 4148 return true; 4149 } 4150 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4151 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4152 gap_run_set_eir_data(); 4153 return true; 4154 } 4155 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4156 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4157 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4158 return true; 4159 } 4160 // write page scan activity 4161 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 4162 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 4163 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 4164 return true; 4165 } 4166 // write page scan type 4167 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 4168 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 4169 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 4170 return true; 4171 } 4172 // send scan enable 4173 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 4174 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 4175 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4176 return true; 4177 } 4178 4179 // start/stop inquiry 4180 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4181 uint8_t duration = hci_stack->inquiry_state; 4182 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4183 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4184 return true; 4185 } 4186 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4187 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4188 hci_send_cmd(&hci_inquiry_cancel); 4189 return true; 4190 } 4191 // remote name request 4192 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4193 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4194 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4195 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4196 return true; 4197 } 4198 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4199 // Local OOB data 4200 if (hci_stack->classic_read_local_oob_data){ 4201 hci_stack->classic_read_local_oob_data = false; 4202 if (hci_stack->local_supported_commands[1] & 0x10u){ 4203 hci_send_cmd(&hci_read_local_extended_oob_data); 4204 } else { 4205 hci_send_cmd(&hci_read_local_oob_data); 4206 } 4207 } 4208 #endif 4209 // pairing 4210 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4211 uint8_t state = hci_stack->gap_pairing_state; 4212 uint8_t pin_code[16]; 4213 switch (state){ 4214 case GAP_PAIRING_STATE_SEND_PIN: 4215 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4216 memset(pin_code, 0, 16); 4217 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4218 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4219 break; 4220 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4221 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4222 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4223 break; 4224 case GAP_PAIRING_STATE_SEND_PASSKEY: 4225 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4226 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4227 break; 4228 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4229 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4230 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4231 break; 4232 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4233 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4234 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4235 break; 4236 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4237 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4238 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4239 break; 4240 default: 4241 break; 4242 } 4243 return true; 4244 } 4245 return false; 4246 } 4247 #endif 4248 4249 #ifdef ENABLE_BLE 4250 static bool hci_run_general_gap_le(void){ 4251 4252 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4253 4254 if (hci_stack->state != HCI_STATE_WORKING) return false; 4255 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4256 4257 4258 // Phase 1: collect what to stop 4259 4260 bool scanning_stop = false; 4261 bool connecting_stop = false; 4262 bool advertising_stop = false; 4263 4264 #ifndef ENABLE_LE_CENTRAL 4265 UNUSED(scanning_stop); 4266 UNUSED(connecting_stop); 4267 #endif 4268 #ifndef ENABLE_LE_PERIPHERAL 4269 UNUSED(advertising_stop); 4270 #endif 4271 4272 // check if whitelist needs modification 4273 bool whitelist_modification_pending = false; 4274 btstack_linked_list_iterator_t lit; 4275 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4276 while (btstack_linked_list_iterator_has_next(&lit)){ 4277 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4278 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4279 whitelist_modification_pending = true; 4280 break; 4281 } 4282 } 4283 // check if resolving list needs modification 4284 bool resolving_list_modification_pending = false; 4285 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4286 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4287 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4288 resolving_list_modification_pending = true; 4289 } 4290 #endif 4291 4292 #ifdef ENABLE_LE_CENTRAL 4293 // scanning control 4294 if (hci_stack->le_scanning_active) { 4295 // stop if: 4296 // - parameter change required 4297 // - it's disabled 4298 // - whitelist change required but used for scanning 4299 // - resolving list modified 4300 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4301 if ((hci_stack->le_scanning_param_update) || 4302 !hci_stack->le_scanning_enabled || 4303 scanning_uses_whitelist || 4304 resolving_list_modification_pending){ 4305 4306 scanning_stop = true; 4307 } 4308 } 4309 #endif 4310 4311 #ifdef ENABLE_LE_CENTRAL 4312 // connecting control 4313 bool connecting_with_whitelist; 4314 switch (hci_stack->le_connecting_state){ 4315 case LE_CONNECTING_DIRECT: 4316 case LE_CONNECTING_WHITELIST: 4317 // stop connecting if: 4318 // - connecting uses white and whitelist modification pending 4319 // - if it got disabled 4320 // - resolving list modified 4321 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4322 if ((connecting_with_whitelist && whitelist_modification_pending) || 4323 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4324 resolving_list_modification_pending) { 4325 4326 connecting_stop = true; 4327 } 4328 break; 4329 default: 4330 break; 4331 } 4332 #endif 4333 4334 #ifdef ENABLE_LE_PERIPHERAL 4335 // le advertisement control 4336 if (hci_stack->le_advertisements_active){ 4337 // stop if: 4338 // - parameter change required 4339 // - it's disabled 4340 // - whitelist change required but used for advertisement filter policy 4341 // - resolving list modified 4342 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4343 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4344 if (advertising_change || 4345 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4346 (advertising_uses_whitelist & whitelist_modification_pending) || 4347 resolving_list_modification_pending) { 4348 4349 advertising_stop = true; 4350 } 4351 } 4352 #endif 4353 4354 4355 // Phase 2: stop everything that should be off during modifications 4356 4357 #ifdef ENABLE_LE_CENTRAL 4358 if (scanning_stop){ 4359 hci_stack->le_scanning_active = false; 4360 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4361 return true; 4362 } 4363 #endif 4364 4365 #ifdef ENABLE_LE_CENTRAL 4366 if (connecting_stop){ 4367 hci_send_cmd(&hci_le_create_connection_cancel); 4368 return true; 4369 } 4370 #endif 4371 4372 #ifdef ENABLE_LE_PERIPHERAL 4373 if (advertising_stop){ 4374 hci_stack->le_advertisements_active = false; 4375 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4376 return true; 4377 } 4378 #endif 4379 4380 // Phase 3: modify 4381 4382 #ifdef ENABLE_LE_CENTRAL 4383 if (hci_stack->le_scanning_param_update){ 4384 hci_stack->le_scanning_param_update = false; 4385 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4386 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4387 return true; 4388 } 4389 #endif 4390 4391 #ifdef ENABLE_LE_PERIPHERAL 4392 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4393 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4394 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4395 hci_send_cmd(&hci_le_set_advertising_parameters, 4396 hci_stack->le_advertisements_interval_min, 4397 hci_stack->le_advertisements_interval_max, 4398 hci_stack->le_advertisements_type, 4399 hci_stack->le_advertisements_own_addr_type, 4400 hci_stack->le_advertisements_direct_address_type, 4401 hci_stack->le_advertisements_direct_address, 4402 hci_stack->le_advertisements_channel_map, 4403 hci_stack->le_advertisements_filter_policy); 4404 return true; 4405 } 4406 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4407 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4408 uint8_t adv_data_clean[31]; 4409 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4410 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4411 hci_stack->le_advertisements_data_len); 4412 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4413 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4414 return true; 4415 } 4416 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4417 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4418 uint8_t scan_data_clean[31]; 4419 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4420 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4421 hci_stack->le_scan_response_data_len); 4422 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4423 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4424 return true; 4425 } 4426 #endif 4427 4428 4429 #ifdef ENABLE_LE_CENTRAL 4430 // if connect with whitelist was active and is not cancelled yet, wait until next time 4431 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4432 #endif 4433 4434 // LE Whitelist Management 4435 if (whitelist_modification_pending){ 4436 // add/remove entries 4437 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4438 while (btstack_linked_list_iterator_has_next(&lit)){ 4439 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4440 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4441 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4442 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4443 return true; 4444 } 4445 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4446 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4447 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4448 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4449 return true; 4450 } 4451 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4452 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4453 btstack_memory_whitelist_entry_free(entry); 4454 } 4455 } 4456 } 4457 4458 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4459 // LE Resolving List Management 4460 if (resolving_list_supported) { 4461 uint16_t i; 4462 switch (hci_stack->le_resolving_list_state) { 4463 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4464 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4465 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4466 return true; 4467 case LE_RESOLVING_LIST_READ_SIZE: 4468 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4469 hci_send_cmd(&hci_le_read_resolving_list_size); 4470 return true; 4471 case LE_RESOLVING_LIST_SEND_CLEAR: 4472 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4473 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4474 sizeof(hci_stack->le_resolving_list_add_entries)); 4475 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4476 sizeof(hci_stack->le_resolving_list_remove_entries)); 4477 hci_send_cmd(&hci_le_clear_resolving_list); 4478 return true; 4479 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4480 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4481 uint8_t offset = i >> 3; 4482 uint8_t mask = 1 << (i & 7); 4483 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4484 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4485 bd_addr_t peer_identity_addreses; 4486 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4487 sm_key_t peer_irk; 4488 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4489 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4490 4491 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4492 // trigger whitelist entry 'update' (work around for controller bug) 4493 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4494 while (btstack_linked_list_iterator_has_next(&lit)) { 4495 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4496 if (entry->address_type != peer_identity_addr_type) continue; 4497 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4498 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4499 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4500 } 4501 #endif 4502 4503 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4504 peer_identity_addreses); 4505 return true; 4506 } 4507 4508 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4509 4510 /* fall through */ 4511 4512 case LE_RESOLVING_LIST_ADD_ENTRIES: 4513 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4514 uint8_t offset = i >> 3; 4515 uint8_t mask = 1 << (i & 7); 4516 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4517 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4518 bd_addr_t peer_identity_addreses; 4519 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4520 sm_key_t peer_irk; 4521 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4522 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4523 const uint8_t *local_irk = gap_get_persistent_irk(); 4524 // command uses format specifier 'P' that stores 16-byte value without flip 4525 uint8_t local_irk_flipped[16]; 4526 uint8_t peer_irk_flipped[16]; 4527 reverse_128(local_irk, local_irk_flipped); 4528 reverse_128(peer_irk, peer_irk_flipped); 4529 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4530 peer_irk_flipped, local_irk_flipped); 4531 return true; 4532 } 4533 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4534 break; 4535 4536 default: 4537 break; 4538 } 4539 } 4540 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4541 #endif 4542 4543 // Phase 4: restore state 4544 4545 #ifdef ENABLE_LE_CENTRAL 4546 // re-start scanning 4547 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4548 hci_stack->le_scanning_active = true; 4549 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4550 return true; 4551 } 4552 #endif 4553 4554 #ifdef ENABLE_LE_CENTRAL 4555 // re-start connecting 4556 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4557 bd_addr_t null_addr; 4558 memset(null_addr, 0, 6); 4559 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4560 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4561 hci_send_cmd(&hci_le_create_connection, 4562 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4563 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4564 1, // use whitelist 4565 0, // peer address type 4566 null_addr, // peer bd addr 4567 hci_stack->le_connection_own_addr_type, // our addr type: 4568 hci_stack->le_connection_interval_min, // conn interval min 4569 hci_stack->le_connection_interval_max, // conn interval max 4570 hci_stack->le_connection_latency, // conn latency 4571 hci_stack->le_supervision_timeout, // conn latency 4572 hci_stack->le_minimum_ce_length, // min ce length 4573 hci_stack->le_maximum_ce_length // max ce length 4574 ); 4575 return true; 4576 } 4577 #endif 4578 4579 #ifdef ENABLE_LE_PERIPHERAL 4580 // re-start advertising 4581 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4582 // check if advertisements should be enabled given 4583 hci_stack->le_advertisements_active = true; 4584 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4585 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4586 return true; 4587 } 4588 #endif 4589 4590 return false; 4591 } 4592 #endif 4593 4594 static bool hci_run_general_pending_commands(void){ 4595 btstack_linked_item_t * it; 4596 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4597 hci_connection_t * connection = (hci_connection_t *) it; 4598 4599 switch(connection->state){ 4600 case SEND_CREATE_CONNECTION: 4601 switch(connection->address_type){ 4602 #ifdef ENABLE_CLASSIC 4603 case BD_ADDR_TYPE_ACL: 4604 log_info("sending hci_create_connection"); 4605 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4606 break; 4607 #endif 4608 default: 4609 #ifdef ENABLE_BLE 4610 #ifdef ENABLE_LE_CENTRAL 4611 log_info("sending hci_le_create_connection"); 4612 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4613 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4614 hci_send_cmd(&hci_le_create_connection, 4615 hci_stack->le_connection_scan_interval, // conn scan interval 4616 hci_stack->le_connection_scan_window, // conn scan windows 4617 0, // don't use whitelist 4618 connection->address_type, // peer address type 4619 connection->address, // peer bd addr 4620 hci_stack->le_connection_own_addr_type, // our addr type: 4621 hci_stack->le_connection_interval_min, // conn interval min 4622 hci_stack->le_connection_interval_max, // conn interval max 4623 hci_stack->le_connection_latency, // conn latency 4624 hci_stack->le_supervision_timeout, // conn latency 4625 hci_stack->le_minimum_ce_length, // min ce length 4626 hci_stack->le_maximum_ce_length // max ce length 4627 ); 4628 connection->state = SENT_CREATE_CONNECTION; 4629 #endif 4630 #endif 4631 break; 4632 } 4633 return true; 4634 4635 #ifdef ENABLE_CLASSIC 4636 case RECEIVED_CONNECTION_REQUEST: 4637 connection->role = HCI_ROLE_SLAVE; 4638 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4639 log_info("sending hci_accept_connection_request"); 4640 connection->state = ACCEPTED_CONNECTION_REQUEST; 4641 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4642 } 4643 return true; 4644 #endif 4645 4646 #ifdef ENABLE_BLE 4647 #ifdef ENABLE_LE_CENTRAL 4648 case SEND_CANCEL_CONNECTION: 4649 connection->state = SENT_CANCEL_CONNECTION; 4650 hci_send_cmd(&hci_le_create_connection_cancel); 4651 return true; 4652 #endif 4653 #endif 4654 case SEND_DISCONNECT: 4655 connection->state = SENT_DISCONNECT; 4656 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4657 return true; 4658 4659 default: 4660 break; 4661 } 4662 4663 // no further commands if connection is about to get shut down 4664 if (connection->state == SENT_DISCONNECT) continue; 4665 4666 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4667 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4668 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4669 return true; 4670 } 4671 4672 #ifdef ENABLE_CLASSIC 4673 4674 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4675 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4676 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4677 return true; 4678 } 4679 4680 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4681 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4682 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4683 return true; 4684 } 4685 4686 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4687 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4688 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4689 return true; 4690 } 4691 4692 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4693 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4694 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4695 return true; 4696 } 4697 4698 // Handling link key request requires remote supported features 4699 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4700 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4701 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4702 4703 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4704 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4705 if (have_link_key && security_level_sufficient){ 4706 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4707 } else { 4708 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4709 } 4710 return true; 4711 } 4712 4713 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4714 log_info("denying to pin request"); 4715 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4716 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4717 return true; 4718 } 4719 4720 // security assessment requires remote features 4721 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4722 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4723 hci_ssp_assess_security_on_io_cap_request(connection); 4724 // 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 4725 } 4726 4727 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4728 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4729 // set authentication requirements: 4730 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4731 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4732 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4733 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4734 authreq |= 1; 4735 } 4736 bool bonding = hci_stack->bondable; 4737 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4738 // if we have received IO Cap Response, we're in responder role 4739 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4740 if (bonding && !remote_bonding){ 4741 log_info("Remote not bonding, dropping local flag"); 4742 bonding = false; 4743 } 4744 } 4745 if (bonding){ 4746 if (connection->bonding_flags & BONDING_DEDICATED){ 4747 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4748 } else { 4749 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4750 } 4751 } 4752 uint8_t have_oob_data = 0; 4753 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4754 if (connection->classic_oob_c_192 != NULL){ 4755 have_oob_data |= 1; 4756 } 4757 if (connection->classic_oob_c_256 != NULL){ 4758 have_oob_data |= 2; 4759 } 4760 #endif 4761 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4762 return true; 4763 } 4764 4765 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4766 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4767 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4768 return true; 4769 } 4770 4771 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4772 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4773 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4774 const uint8_t zero[16] = { 0 }; 4775 const uint8_t * r_192 = zero; 4776 const uint8_t * c_192 = zero; 4777 const uint8_t * r_256 = zero; 4778 const uint8_t * c_256 = zero; 4779 // verify P-256 OOB 4780 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4781 c_256 = connection->classic_oob_c_256; 4782 if (connection->classic_oob_r_256 != NULL) { 4783 r_256 = connection->classic_oob_r_256; 4784 } 4785 } 4786 // verify P-192 OOB 4787 if ((connection->classic_oob_c_192 != NULL)) { 4788 c_192 = connection->classic_oob_c_192; 4789 if (connection->classic_oob_r_192 != NULL) { 4790 r_192 = connection->classic_oob_r_192; 4791 } 4792 } 4793 4794 // assess security 4795 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4796 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4797 if (need_level_4 && !can_reach_level_4){ 4798 log_info("Level 4 required, but not possible -> abort"); 4799 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4800 // send oob negative reply 4801 c_256 = NULL; 4802 c_192 = NULL; 4803 } 4804 4805 // Reply 4806 if (c_256 != zero) { 4807 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4808 } else if (c_192 != zero){ 4809 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4810 } else { 4811 hci_stack->classic_oob_con_handle = connection->con_handle; 4812 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4813 } 4814 return true; 4815 } 4816 #endif 4817 4818 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4819 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4820 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4821 return true; 4822 } 4823 4824 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4825 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4826 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4827 return true; 4828 } 4829 4830 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4831 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4832 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4833 return true; 4834 } 4835 4836 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4837 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4838 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4839 connection->state = SENT_DISCONNECT; 4840 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4841 return true; 4842 } 4843 4844 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4845 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4846 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4847 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4848 return true; 4849 } 4850 4851 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4852 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4853 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4854 return true; 4855 } 4856 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4857 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4858 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4859 return true; 4860 } 4861 #endif 4862 4863 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4864 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4865 #ifdef ENABLE_CLASSIC 4866 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4867 #endif 4868 if (connection->state != SENT_DISCONNECT){ 4869 connection->state = SENT_DISCONNECT; 4870 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4871 return true; 4872 } 4873 } 4874 4875 #ifdef ENABLE_CLASSIC 4876 uint16_t sniff_min_interval; 4877 switch (connection->sniff_min_interval){ 4878 case 0: 4879 break; 4880 case 0xffff: 4881 connection->sniff_min_interval = 0; 4882 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4883 return true; 4884 default: 4885 sniff_min_interval = connection->sniff_min_interval; 4886 connection->sniff_min_interval = 0; 4887 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4888 return true; 4889 } 4890 4891 if (connection->sniff_subrating_max_latency != 0xffff){ 4892 uint16_t max_latency = connection->sniff_subrating_max_latency; 4893 connection->sniff_subrating_max_latency = 0; 4894 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4895 return true; 4896 } 4897 4898 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4899 uint8_t service_type = (uint8_t) connection->qos_service_type; 4900 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4901 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); 4902 return true; 4903 } 4904 4905 if (connection->request_role != HCI_ROLE_INVALID){ 4906 hci_role_t role = connection->request_role; 4907 connection->request_role = HCI_ROLE_INVALID; 4908 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4909 return true; 4910 } 4911 #endif 4912 4913 #ifdef ENABLE_BLE 4914 switch (connection->le_con_parameter_update_state){ 4915 // response to L2CAP CON PARAMETER UPDATE REQUEST 4916 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4917 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4918 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4919 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4920 0x0000, 0xffff); 4921 return true; 4922 case CON_PARAMETER_UPDATE_REPLY: 4923 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4924 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4925 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4926 0x0000, 0xffff); 4927 return true; 4928 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4929 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4930 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4931 return true; 4932 default: 4933 break; 4934 } 4935 if (connection->le_phy_update_all_phys != 0xffu){ 4936 uint8_t all_phys = connection->le_phy_update_all_phys; 4937 connection->le_phy_update_all_phys = 0xff; 4938 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); 4939 return true; 4940 } 4941 #endif 4942 } 4943 return false; 4944 } 4945 4946 static void hci_run(void){ 4947 4948 bool done; 4949 4950 // send continuation fragments first, as they block the prepared packet buffer 4951 done = hci_run_acl_fragments(); 4952 if (done) return; 4953 4954 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4955 // send host num completed packets next as they don't require num_cmd_packets > 0 4956 if (!hci_can_send_comand_packet_transport()) return; 4957 if (hci_stack->host_completed_packets){ 4958 hci_host_num_completed_packets(); 4959 return; 4960 } 4961 #endif 4962 4963 if (!hci_can_send_command_packet_now()) return; 4964 4965 // global/non-connection oriented commands 4966 4967 4968 #ifdef ENABLE_CLASSIC 4969 // general gap classic 4970 done = hci_run_general_gap_classic(); 4971 if (done) return; 4972 #endif 4973 4974 #ifdef ENABLE_BLE 4975 // general gap le 4976 done = hci_run_general_gap_le(); 4977 if (done) return; 4978 #endif 4979 4980 // send pending HCI commands 4981 done = hci_run_general_pending_commands(); 4982 if (done) return; 4983 4984 // stack state sub statemachines 4985 hci_connection_t * connection; 4986 switch (hci_stack->state){ 4987 case HCI_STATE_INITIALIZING: 4988 hci_initializing_run(); 4989 break; 4990 4991 case HCI_STATE_HALTING: 4992 4993 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4994 switch (hci_stack->substate){ 4995 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4996 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4997 4998 #ifdef ENABLE_BLE 4999 #ifdef ENABLE_LE_CENTRAL 5000 // free whitelist entries 5001 { 5002 btstack_linked_list_iterator_t lit; 5003 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5004 while (btstack_linked_list_iterator_has_next(&lit)){ 5005 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5006 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5007 btstack_memory_whitelist_entry_free(entry); 5008 } 5009 } 5010 #endif 5011 #endif 5012 // close all open connections 5013 connection = (hci_connection_t *) hci_stack->connections; 5014 if (connection){ 5015 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5016 if (!hci_can_send_command_packet_now()) return; 5017 5018 // check state 5019 if (connection->state == SENT_DISCONNECT) return; 5020 connection->state = SENT_DISCONNECT; 5021 5022 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5023 5024 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5025 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5026 5027 // ... which would be ignored anyway as we shutdown (free) the connection now 5028 hci_shutdown_connection(connection); 5029 5030 // finally, send the disconnect command 5031 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5032 return; 5033 } 5034 5035 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5036 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5037 log_info("HCI_STATE_HALTING: wait 50 ms"); 5038 hci_stack->substate = HCI_HALTING_W4_TIMER; 5039 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5040 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5041 btstack_run_loop_add_timer(&hci_stack->timeout); 5042 break; 5043 } 5044 5045 /* fall through */ 5046 5047 case HCI_HALTING_CLOSE: 5048 log_info("HCI_STATE_HALTING, calling off"); 5049 5050 // switch mode 5051 hci_power_control_off(); 5052 5053 log_info("HCI_STATE_HALTING, emitting state"); 5054 hci_emit_state(); 5055 log_info("HCI_STATE_HALTING, done"); 5056 break; 5057 5058 case HCI_HALTING_W4_TIMER: 5059 // keep waiting 5060 5061 break; 5062 default: 5063 break; 5064 } 5065 5066 break; 5067 5068 case HCI_STATE_FALLING_ASLEEP: 5069 switch(hci_stack->substate) { 5070 case HCI_FALLING_ASLEEP_DISCONNECT: 5071 log_info("HCI_STATE_FALLING_ASLEEP"); 5072 // close all open connections 5073 connection = (hci_connection_t *) hci_stack->connections; 5074 if (connection){ 5075 5076 // send disconnect 5077 if (!hci_can_send_command_packet_now()) return; 5078 5079 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5080 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5081 5082 // send disconnected event right away - causes higher layer connections to get closed, too. 5083 hci_shutdown_connection(connection); 5084 return; 5085 } 5086 5087 if (hci_classic_supported()){ 5088 // disable page and inquiry scan 5089 if (!hci_can_send_command_packet_now()) return; 5090 5091 log_info("HCI_STATE_HALTING, disabling inq scans"); 5092 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5093 5094 // continue in next sub state 5095 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5096 break; 5097 } 5098 5099 /* fall through */ 5100 5101 case HCI_FALLING_ASLEEP_COMPLETE: 5102 log_info("HCI_STATE_HALTING, calling sleep"); 5103 // switch mode 5104 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5105 hci_emit_state(); 5106 break; 5107 5108 default: 5109 break; 5110 } 5111 break; 5112 5113 default: 5114 break; 5115 } 5116 } 5117 5118 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5119 // house-keeping 5120 5121 #ifdef ENABLE_CLASSIC 5122 bd_addr_t addr; 5123 hci_connection_t * conn; 5124 #endif 5125 #ifdef ENABLE_LE_CENTRAL 5126 uint8_t initiator_filter_policy; 5127 #endif 5128 5129 uint16_t opcode = little_endian_read_16(packet, 0); 5130 switch (opcode) { 5131 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5132 hci_stack->loopback_mode = packet[3]; 5133 break; 5134 5135 #ifdef ENABLE_CLASSIC 5136 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5137 reverse_bd_addr(&packet[3], addr); 5138 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5139 5140 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5141 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5142 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5143 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5144 } 5145 5146 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5147 if (!conn) { 5148 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5149 if (!conn) { 5150 // notify client that alloc failed 5151 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5152 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5153 } 5154 conn->state = SEND_CREATE_CONNECTION; 5155 conn->role = HCI_ROLE_MASTER; 5156 } 5157 5158 conn->con_handle = HCI_CON_HANDLE_INVALID; 5159 conn->role = HCI_ROLE_INVALID; 5160 5161 log_info("conn state %u", conn->state); 5162 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5163 switch (conn->state) { 5164 // if connection active exists 5165 case OPEN: 5166 // and OPEN, emit connection complete command 5167 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5168 // packet not sent to controller 5169 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5170 case RECEIVED_DISCONNECTION_COMPLETE: 5171 // create connection triggered in disconnect complete event, let's do it now 5172 break; 5173 case SEND_CREATE_CONNECTION: 5174 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5175 break; 5176 default: 5177 // otherwise, just ignore as it is already in the open process 5178 // packet not sent to controller 5179 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5180 } 5181 conn->state = SENT_CREATE_CONNECTION; 5182 5183 // track outgoing connection 5184 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5185 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5186 break; 5187 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5188 if (hci_stack->link_key_db) { 5189 reverse_bd_addr(&packet[3], addr); 5190 hci_stack->link_key_db->delete_link_key(addr); 5191 } 5192 break; 5193 5194 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5195 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5196 // setup_synchronous_connection? Voice setting at offset 22 5197 // TODO: compare to current setting if sco connection already active 5198 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5199 break; 5200 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5201 // accept_synchronus_connection? Voice setting at offset 18 5202 // TODO: compare to current setting if sco connection already active 5203 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5204 break; 5205 #endif 5206 #endif 5207 5208 #ifdef ENABLE_BLE 5209 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5210 hci_stack->le_random_address_set = 1; 5211 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5212 break; 5213 #ifdef ENABLE_LE_PERIPHERAL 5214 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5215 hci_stack->le_advertisements_active = packet[3] != 0; 5216 break; 5217 #endif 5218 #ifdef ENABLE_LE_CENTRAL 5219 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5220 // white list used? 5221 initiator_filter_policy = packet[7]; 5222 switch (initiator_filter_policy) { 5223 case 0: 5224 // whitelist not used 5225 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5226 break; 5227 case 1: 5228 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5229 break; 5230 default: 5231 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5232 break; 5233 } 5234 // track outgoing connection 5235 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5236 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5237 break; 5238 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5239 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5240 break; 5241 #endif 5242 #endif 5243 default: 5244 break; 5245 } 5246 5247 hci_stack->num_cmd_packets--; 5248 5249 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5250 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5251 if (err != 0){ 5252 return ERROR_CODE_HARDWARE_FAILURE; 5253 } 5254 return ERROR_CODE_SUCCESS; 5255 } 5256 5257 // disconnect because of security block 5258 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5259 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5260 if (!connection) return; 5261 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5262 } 5263 5264 5265 // Configure Secure Simple Pairing 5266 5267 #ifdef ENABLE_CLASSIC 5268 5269 // enable will enable SSP during init 5270 void gap_ssp_set_enable(int enable){ 5271 hci_stack->ssp_enable = enable; 5272 } 5273 5274 static int hci_local_ssp_activated(void){ 5275 return gap_ssp_supported() && hci_stack->ssp_enable; 5276 } 5277 5278 // if set, BTstack will respond to io capability request using authentication requirement 5279 void gap_ssp_set_io_capability(int io_capability){ 5280 hci_stack->ssp_io_capability = io_capability; 5281 } 5282 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5283 hci_stack->ssp_authentication_requirement = authentication_requirement; 5284 } 5285 5286 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5287 void gap_ssp_set_auto_accept(int auto_accept){ 5288 hci_stack->ssp_auto_accept = auto_accept; 5289 } 5290 5291 void gap_secure_connections_enable(bool enable){ 5292 hci_stack->secure_connections_enable = enable; 5293 } 5294 5295 #endif 5296 5297 // va_list part of hci_send_cmd 5298 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5299 if (!hci_can_send_command_packet_now()){ 5300 log_error("hci_send_cmd called but cannot send packet now"); 5301 return ERROR_CODE_COMMAND_DISALLOWED; 5302 } 5303 5304 // for HCI INITIALIZATION 5305 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5306 hci_stack->last_cmd_opcode = cmd->opcode; 5307 5308 hci_reserve_packet_buffer(); 5309 uint8_t * packet = hci_stack->hci_packet_buffer; 5310 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5311 uint8_t status = hci_send_cmd_packet(packet, size); 5312 5313 // release packet buffer on error or for synchronous transport implementations 5314 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5315 hci_release_packet_buffer(); 5316 hci_emit_transport_packet_sent(); 5317 } 5318 5319 return status; 5320 } 5321 5322 /** 5323 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5324 */ 5325 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5326 va_list argptr; 5327 va_start(argptr, cmd); 5328 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5329 va_end(argptr); 5330 return status; 5331 } 5332 5333 // Create various non-HCI events. 5334 // TODO: generalize, use table similar to hci_create_command 5335 5336 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5337 // dump packet 5338 if (dump) { 5339 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5340 } 5341 5342 // dispatch to all event handlers 5343 btstack_linked_list_iterator_t it; 5344 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5345 while (btstack_linked_list_iterator_has_next(&it)){ 5346 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5347 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5348 } 5349 } 5350 5351 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5352 if (!hci_stack->acl_packet_handler) return; 5353 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5354 } 5355 5356 #ifdef ENABLE_CLASSIC 5357 static void hci_notify_if_sco_can_send_now(void){ 5358 // notify SCO sender if waiting 5359 if (!hci_stack->sco_waiting_for_can_send_now) return; 5360 if (hci_can_send_sco_packet_now()){ 5361 hci_stack->sco_waiting_for_can_send_now = 0; 5362 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5363 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5364 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5365 } 5366 } 5367 5368 // parsing end emitting has been merged to reduce code size 5369 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5370 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5371 5372 uint8_t * eir_data; 5373 ad_context_t context; 5374 const uint8_t * name; 5375 uint8_t name_len; 5376 5377 if (size < 3) return; 5378 5379 int event_type = hci_event_packet_get_type(packet); 5380 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5381 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5382 5383 switch (event_type){ 5384 case HCI_EVENT_INQUIRY_RESULT: 5385 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5386 if (size != (3 + (num_responses * 14))) return; 5387 break; 5388 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5389 if (size != 257) return; 5390 if (num_responses != 1) return; 5391 break; 5392 default: 5393 return; 5394 } 5395 5396 // event[1] is set at the end 5397 int i; 5398 for (i=0; i<num_responses;i++){ 5399 memset(event, 0, sizeof(event)); 5400 event[0] = GAP_EVENT_INQUIRY_RESULT; 5401 uint8_t event_size = 27; // if name is not set by EIR 5402 5403 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5404 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5405 (void)memcpy(&event[9], 5406 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5407 3); // class of device 5408 (void)memcpy(&event[12], 5409 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5410 2); // clock offset 5411 5412 switch (event_type){ 5413 case HCI_EVENT_INQUIRY_RESULT: 5414 // 14,15,16,17 = 0, size 18 5415 break; 5416 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5417 event[14] = 1; 5418 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5419 // 16,17 = 0, size 18 5420 break; 5421 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5422 event[14] = 1; 5423 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5424 // EIR packets only contain a single inquiry response 5425 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5426 name = NULL; 5427 // Iterate over EIR data 5428 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5429 uint8_t data_type = ad_iterator_get_data_type(&context); 5430 uint8_t data_size = ad_iterator_get_data_len(&context); 5431 const uint8_t * data = ad_iterator_get_data(&context); 5432 // Prefer Complete Local Name over Shortened Local Name 5433 switch (data_type){ 5434 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5435 if (name) continue; 5436 /* fall through */ 5437 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5438 name = data; 5439 name_len = data_size; 5440 break; 5441 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5442 if (data_size != 8) break; 5443 event[16] = 1; 5444 memcpy(&event[17], data, 8); 5445 break; 5446 default: 5447 break; 5448 } 5449 } 5450 if (name){ 5451 event[25] = 1; 5452 // truncate name if needed 5453 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5454 event[26] = len; 5455 (void)memcpy(&event[27], name, len); 5456 event_size += len; 5457 } 5458 break; 5459 default: 5460 return; 5461 } 5462 event[1] = event_size - 2; 5463 hci_emit_event(event, event_size, 1); 5464 } 5465 } 5466 #endif 5467 5468 void hci_emit_state(void){ 5469 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5470 uint8_t event[3]; 5471 event[0] = BTSTACK_EVENT_STATE; 5472 event[1] = sizeof(event) - 2u; 5473 event[2] = hci_stack->state; 5474 hci_emit_event(event, sizeof(event), 1); 5475 } 5476 5477 #ifdef ENABLE_CLASSIC 5478 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5479 uint8_t event[13]; 5480 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5481 event[1] = sizeof(event) - 2; 5482 event[2] = status; 5483 little_endian_store_16(event, 3, con_handle); 5484 reverse_bd_addr(address, &event[5]); 5485 event[11] = 1; // ACL connection 5486 event[12] = 0; // encryption disabled 5487 hci_emit_event(event, sizeof(event), 1); 5488 } 5489 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5490 if (disable_l2cap_timeouts) return; 5491 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5492 uint8_t event[4]; 5493 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5494 event[1] = sizeof(event) - 2; 5495 little_endian_store_16(event, 2, conn->con_handle); 5496 hci_emit_event(event, sizeof(event), 1); 5497 } 5498 #endif 5499 5500 #ifdef ENABLE_BLE 5501 #ifdef ENABLE_LE_CENTRAL 5502 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){ 5503 uint8_t event[21]; 5504 event[0] = HCI_EVENT_LE_META; 5505 event[1] = sizeof(event) - 2u; 5506 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5507 event[3] = status; 5508 little_endian_store_16(event, 4, con_handle); 5509 event[6] = 0; // TODO: role 5510 event[7] = address_type; 5511 reverse_bd_addr(address, &event[8]); 5512 little_endian_store_16(event, 14, 0); // interval 5513 little_endian_store_16(event, 16, 0); // latency 5514 little_endian_store_16(event, 18, 0); // supervision timeout 5515 event[20] = 0; // master clock accuracy 5516 hci_emit_event(event, sizeof(event), 1); 5517 } 5518 #endif 5519 #endif 5520 5521 static void hci_emit_transport_packet_sent(void){ 5522 // notify upper stack that it might be possible to send again 5523 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5524 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5525 } 5526 5527 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5528 uint8_t event[6]; 5529 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5530 event[1] = sizeof(event) - 2u; 5531 event[2] = 0; // status = OK 5532 little_endian_store_16(event, 3, con_handle); 5533 event[5] = reason; 5534 hci_emit_event(event, sizeof(event), 1); 5535 } 5536 5537 static void hci_emit_nr_connections_changed(void){ 5538 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5539 uint8_t event[3]; 5540 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5541 event[1] = sizeof(event) - 2u; 5542 event[2] = nr_hci_connections(); 5543 hci_emit_event(event, sizeof(event), 1); 5544 } 5545 5546 static void hci_emit_hci_open_failed(void){ 5547 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5548 uint8_t event[2]; 5549 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5550 event[1] = sizeof(event) - 2u; 5551 hci_emit_event(event, sizeof(event), 1); 5552 } 5553 5554 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5555 log_info("hci_emit_dedicated_bonding_result %u ", status); 5556 uint8_t event[9]; 5557 int pos = 0; 5558 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5559 event[pos++] = sizeof(event) - 2u; 5560 event[pos++] = status; 5561 reverse_bd_addr(address, &event[pos]); 5562 hci_emit_event(event, sizeof(event), 1); 5563 } 5564 5565 5566 #ifdef ENABLE_CLASSIC 5567 5568 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5569 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5570 uint8_t event[5]; 5571 int pos = 0; 5572 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5573 event[pos++] = sizeof(event) - 2; 5574 little_endian_store_16(event, 2, con_handle); 5575 pos += 2; 5576 event[pos++] = level; 5577 hci_emit_event(event, sizeof(event), 1); 5578 } 5579 5580 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5581 if (!connection) return LEVEL_0; 5582 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5583 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5584 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5585 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5586 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5587 // LEVEL 4 always requires 128 bit encrytion key size 5588 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5589 security_level = LEVEL_3; 5590 } 5591 return security_level; 5592 } 5593 5594 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5595 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5596 uint8_t event[3]; 5597 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5598 event[1] = sizeof(event) - 2; 5599 event[2] = enabled; 5600 hci_emit_event(event, sizeof(event), 1); 5601 } 5602 5603 // query if remote side supports eSCO 5604 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5605 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5606 if (!connection) return false; 5607 return (connection->remote_supported_features[0] & 1) != 0; 5608 } 5609 5610 static bool hci_ssp_supported(hci_connection_t * connection){ 5611 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5612 return (connection->bonding_flags & mask) == mask; 5613 } 5614 5615 // query if remote side supports SSP 5616 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5617 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5618 if (!connection) return false; 5619 return hci_ssp_supported(connection) ? 1 : 0; 5620 } 5621 5622 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5623 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5624 } 5625 5626 // GAP API 5627 /** 5628 * @bbrief enable/disable bonding. default is enabled 5629 * @praram enabled 5630 */ 5631 void gap_set_bondable_mode(int enable){ 5632 hci_stack->bondable = enable ? 1 : 0; 5633 } 5634 /** 5635 * @brief Get bondable mode. 5636 * @return 1 if bondable 5637 */ 5638 int gap_get_bondable_mode(void){ 5639 return hci_stack->bondable; 5640 } 5641 5642 /** 5643 * @brief map link keys to security levels 5644 */ 5645 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5646 switch (link_key_type){ 5647 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5648 return LEVEL_4; 5649 case COMBINATION_KEY: 5650 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5651 return LEVEL_3; 5652 default: 5653 return LEVEL_2; 5654 } 5655 } 5656 5657 /** 5658 * @brief map link keys to secure connection yes/no 5659 */ 5660 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5661 switch (link_key_type){ 5662 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5663 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5664 return 1; 5665 default: 5666 return 0; 5667 } 5668 } 5669 5670 /** 5671 * @brief map link keys to authenticated 5672 */ 5673 int gap_authenticated_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 AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5677 return 1; 5678 default: 5679 return 0; 5680 } 5681 } 5682 5683 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5684 log_info("gap_mitm_protection_required_for_security_level %u", level); 5685 return level > LEVEL_2; 5686 } 5687 5688 /** 5689 * @brief get current security level 5690 */ 5691 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5692 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5693 if (!connection) return LEVEL_0; 5694 return gap_security_level_for_connection(connection); 5695 } 5696 5697 /** 5698 * @brief request connection to device to 5699 * @result GAP_AUTHENTICATION_RESULT 5700 */ 5701 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5702 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5703 if (!connection){ 5704 hci_emit_security_level(con_handle, LEVEL_0); 5705 return; 5706 } 5707 5708 btstack_assert(hci_is_le_connection(connection) == false); 5709 5710 // 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) 5711 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5712 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5713 requested_level = LEVEL_4; 5714 } 5715 5716 gap_security_level_t current_level = gap_security_level(con_handle); 5717 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5718 requested_level, connection->requested_security_level, current_level); 5719 5720 // authentication active if authentication request was sent or planned level > 0 5721 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5722 if (authentication_active){ 5723 // authentication already active 5724 if (connection->requested_security_level < requested_level){ 5725 // increase requested level as new level is higher 5726 // TODO: handle re-authentication when done 5727 connection->requested_security_level = requested_level; 5728 } 5729 } else { 5730 // no request active, notify if security sufficient 5731 if (requested_level <= current_level){ 5732 hci_emit_security_level(con_handle, current_level); 5733 return; 5734 } 5735 5736 // store request 5737 connection->requested_security_level = requested_level; 5738 5739 // start to authenticate connection 5740 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5741 hci_run(); 5742 } 5743 } 5744 5745 /** 5746 * @brief start dedicated bonding with device. disconnect after bonding 5747 * @param device 5748 * @param request MITM protection 5749 * @result GAP_DEDICATED_BONDING_COMPLETE 5750 */ 5751 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5752 5753 // create connection state machine 5754 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5755 5756 if (!connection){ 5757 return BTSTACK_MEMORY_ALLOC_FAILED; 5758 } 5759 5760 // delete linkn key 5761 gap_drop_link_key_for_bd_addr(device); 5762 5763 // configure LEVEL_2/3, dedicated bonding 5764 connection->state = SEND_CREATE_CONNECTION; 5765 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5766 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5767 connection->bonding_flags = BONDING_DEDICATED; 5768 5769 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5770 5771 // handle: connnection failure (connection complete != ok) 5772 // handle: authentication failure 5773 // handle: disconnect on done 5774 5775 hci_run(); 5776 5777 return 0; 5778 } 5779 5780 void gap_set_local_name(const char * local_name){ 5781 hci_stack->local_name = local_name; 5782 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5783 // also update EIR if not set by user 5784 if (hci_stack->eir_data == NULL){ 5785 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5786 } 5787 hci_run(); 5788 } 5789 #endif 5790 5791 5792 #ifdef ENABLE_BLE 5793 5794 #ifdef ENABLE_LE_CENTRAL 5795 void gap_start_scan(void){ 5796 hci_stack->le_scanning_enabled = true; 5797 hci_run(); 5798 } 5799 5800 void gap_stop_scan(void){ 5801 hci_stack->le_scanning_enabled = false; 5802 hci_run(); 5803 } 5804 5805 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5806 hci_stack->le_scan_type = scan_type; 5807 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5808 hci_stack->le_scan_interval = scan_interval; 5809 hci_stack->le_scan_window = scan_window; 5810 hci_stack->le_scanning_param_update = true; 5811 hci_run(); 5812 } 5813 5814 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5815 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5816 } 5817 5818 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5819 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5820 if (!conn){ 5821 // disallow if le connection is already outgoing 5822 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5823 log_error("le connection already active"); 5824 return ERROR_CODE_COMMAND_DISALLOWED; 5825 } 5826 5827 log_info("gap_connect: no connection exists yet, creating context"); 5828 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5829 if (!conn){ 5830 // notify client that alloc failed 5831 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5832 log_info("gap_connect: failed to alloc hci_connection_t"); 5833 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5834 } 5835 5836 // set le connecting state 5837 if (hci_is_le_connection_type(addr_type)){ 5838 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5839 } 5840 5841 conn->state = SEND_CREATE_CONNECTION; 5842 log_info("gap_connect: send create connection next"); 5843 hci_run(); 5844 return ERROR_CODE_SUCCESS; 5845 } 5846 5847 if (!hci_is_le_connection(conn) || 5848 (conn->state == SEND_CREATE_CONNECTION) || 5849 (conn->state == SENT_CREATE_CONNECTION)) { 5850 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5851 log_error("gap_connect: classic connection or connect is already being created"); 5852 return GATT_CLIENT_IN_WRONG_STATE; 5853 } 5854 5855 // check if connection was just disconnected 5856 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5857 log_info("gap_connect: send create connection (again)"); 5858 conn->state = SEND_CREATE_CONNECTION; 5859 hci_run(); 5860 return ERROR_CODE_SUCCESS; 5861 } 5862 5863 log_info("gap_connect: context exists with state %u", conn->state); 5864 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5865 hci_run(); 5866 return ERROR_CODE_SUCCESS; 5867 } 5868 5869 // @assumption: only a single outgoing LE Connection exists 5870 static hci_connection_t * gap_get_outgoing_connection(void){ 5871 btstack_linked_item_t *it; 5872 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5873 hci_connection_t * conn = (hci_connection_t *) it; 5874 if (!hci_is_le_connection(conn)) continue; 5875 switch (conn->state){ 5876 case SEND_CREATE_CONNECTION: 5877 case SENT_CREATE_CONNECTION: 5878 case SENT_CANCEL_CONNECTION: 5879 return conn; 5880 default: 5881 break; 5882 }; 5883 } 5884 return NULL; 5885 } 5886 5887 uint8_t gap_connect_cancel(void){ 5888 hci_connection_t * conn = gap_get_outgoing_connection(); 5889 if (!conn) return 0; 5890 switch (conn->state){ 5891 case SEND_CREATE_CONNECTION: 5892 // skip sending create connection and emit event instead 5893 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5894 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5895 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5896 btstack_memory_hci_connection_free( conn ); 5897 break; 5898 case SENT_CREATE_CONNECTION: 5899 // request to send cancel connection 5900 conn->state = SEND_CANCEL_CONNECTION; 5901 hci_run(); 5902 break; 5903 default: 5904 break; 5905 } 5906 return 0; 5907 } 5908 #endif 5909 5910 #ifdef ENABLE_LE_CENTRAL 5911 /** 5912 * @brief Set connection parameters for outgoing connections 5913 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5914 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5915 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5916 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5917 * @param conn_latency, default: 4 5918 * @param supervision_timeout (unit: 10ms), default: 720 ms 5919 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5920 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5921 */ 5922 5923 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5924 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5925 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5926 hci_stack->le_connection_scan_interval = conn_scan_interval; 5927 hci_stack->le_connection_scan_window = conn_scan_window; 5928 hci_stack->le_connection_interval_min = conn_interval_min; 5929 hci_stack->le_connection_interval_max = conn_interval_max; 5930 hci_stack->le_connection_latency = conn_latency; 5931 hci_stack->le_supervision_timeout = supervision_timeout; 5932 hci_stack->le_minimum_ce_length = min_ce_length; 5933 hci_stack->le_maximum_ce_length = max_ce_length; 5934 } 5935 #endif 5936 5937 /** 5938 * @brief Updates the connection parameters for a given LE connection 5939 * @param handle 5940 * @param conn_interval_min (unit: 1.25ms) 5941 * @param conn_interval_max (unit: 1.25ms) 5942 * @param conn_latency 5943 * @param supervision_timeout (unit: 10ms) 5944 * @returns 0 if ok 5945 */ 5946 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5947 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5948 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5949 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5950 connection->le_conn_interval_min = conn_interval_min; 5951 connection->le_conn_interval_max = conn_interval_max; 5952 connection->le_conn_latency = conn_latency; 5953 connection->le_supervision_timeout = supervision_timeout; 5954 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5955 hci_run(); 5956 return 0; 5957 } 5958 5959 /** 5960 * @brief Request an update of the connection parameter for a given LE connection 5961 * @param handle 5962 * @param conn_interval_min (unit: 1.25ms) 5963 * @param conn_interval_max (unit: 1.25ms) 5964 * @param conn_latency 5965 * @param supervision_timeout (unit: 10ms) 5966 * @returns 0 if ok 5967 */ 5968 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5969 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5970 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5971 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5972 connection->le_conn_interval_min = conn_interval_min; 5973 connection->le_conn_interval_max = conn_interval_max; 5974 connection->le_conn_latency = conn_latency; 5975 connection->le_supervision_timeout = supervision_timeout; 5976 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5977 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5978 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5979 return 0; 5980 } 5981 5982 #ifdef ENABLE_LE_PERIPHERAL 5983 5984 /** 5985 * @brief Set Advertisement Data 5986 * @param advertising_data_length 5987 * @param advertising_data (max 31 octets) 5988 * @note data is not copied, pointer has to stay valid 5989 */ 5990 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5991 hci_stack->le_advertisements_data_len = advertising_data_length; 5992 hci_stack->le_advertisements_data = advertising_data; 5993 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5994 hci_run(); 5995 } 5996 5997 /** 5998 * @brief Set Scan Response 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_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6004 hci_stack->le_scan_response_data_len = scan_response_data_length; 6005 hci_stack->le_scan_response_data = scan_response_data; 6006 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6007 hci_run(); 6008 } 6009 6010 /** 6011 * @brief Set Advertisement Parameters 6012 * @param adv_int_min 6013 * @param adv_int_max 6014 * @param adv_type 6015 * @param direct_address_type 6016 * @param direct_address 6017 * @param channel_map 6018 * @param filter_policy 6019 * 6020 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6021 */ 6022 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6023 uint8_t direct_address_typ, bd_addr_t direct_address, 6024 uint8_t channel_map, uint8_t filter_policy) { 6025 6026 hci_stack->le_advertisements_interval_min = adv_int_min; 6027 hci_stack->le_advertisements_interval_max = adv_int_max; 6028 hci_stack->le_advertisements_type = adv_type; 6029 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6030 hci_stack->le_advertisements_channel_map = channel_map; 6031 hci_stack->le_advertisements_filter_policy = filter_policy; 6032 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6033 6); 6034 6035 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6036 hci_run(); 6037 } 6038 6039 /** 6040 * @brief Enable/Disable Advertisements 6041 * @param enabled 6042 */ 6043 void gap_advertisements_enable(int enabled){ 6044 hci_stack->le_advertisements_enabled = enabled != 0; 6045 hci_update_advertisements_enabled_for_current_roles(); 6046 hci_run(); 6047 } 6048 6049 #endif 6050 6051 void hci_le_set_own_address_type(uint8_t own_address_type){ 6052 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6053 if (own_address_type == hci_stack->le_own_addr_type) return; 6054 hci_stack->le_own_addr_type = own_address_type; 6055 6056 #ifdef ENABLE_LE_PERIPHERAL 6057 // update advertisement parameters, too 6058 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6059 hci_run(); 6060 #endif 6061 #ifdef ENABLE_LE_CENTRAL 6062 // note: we don't update scan parameters or modify ongoing connection attempts 6063 #endif 6064 } 6065 6066 #endif 6067 6068 uint8_t gap_disconnect(hci_con_handle_t handle){ 6069 hci_connection_t * conn = hci_connection_for_handle(handle); 6070 if (!conn){ 6071 hci_emit_disconnection_complete(handle, 0); 6072 return 0; 6073 } 6074 // ignore if already disconnected 6075 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6076 return 0; 6077 } 6078 conn->state = SEND_DISCONNECT; 6079 hci_run(); 6080 return 0; 6081 } 6082 6083 int gap_read_rssi(hci_con_handle_t con_handle){ 6084 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6085 if (hci_connection == NULL) return 0; 6086 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6087 hci_run(); 6088 return 1; 6089 } 6090 6091 /** 6092 * @brief Get connection type 6093 * @param con_handle 6094 * @result connection_type 6095 */ 6096 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6097 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6098 if (!conn) return GAP_CONNECTION_INVALID; 6099 switch (conn->address_type){ 6100 case BD_ADDR_TYPE_LE_PUBLIC: 6101 case BD_ADDR_TYPE_LE_RANDOM: 6102 return GAP_CONNECTION_LE; 6103 case BD_ADDR_TYPE_SCO: 6104 return GAP_CONNECTION_SCO; 6105 case BD_ADDR_TYPE_ACL: 6106 return GAP_CONNECTION_ACL; 6107 default: 6108 return GAP_CONNECTION_INVALID; 6109 } 6110 } 6111 6112 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6113 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6114 if (!conn) return HCI_ROLE_INVALID; 6115 return (hci_role_t) conn->role; 6116 } 6117 6118 6119 #ifdef ENABLE_CLASSIC 6120 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6121 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6122 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6123 conn->request_role = role; 6124 hci_run(); 6125 return ERROR_CODE_SUCCESS; 6126 } 6127 #endif 6128 6129 #ifdef ENABLE_BLE 6130 6131 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){ 6132 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6133 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6134 6135 conn->le_phy_update_all_phys = all_phys; 6136 conn->le_phy_update_tx_phys = tx_phys; 6137 conn->le_phy_update_rx_phys = rx_phys; 6138 conn->le_phy_update_phy_options = phy_options; 6139 6140 hci_run(); 6141 6142 return 0; 6143 } 6144 6145 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6146 // check if already in list 6147 btstack_linked_list_iterator_t it; 6148 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6149 while (btstack_linked_list_iterator_has_next(&it)) { 6150 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6151 if (entry->address_type != address_type) { 6152 continue; 6153 } 6154 if (memcmp(entry->address, address, 6) != 0) { 6155 continue; 6156 } 6157 // disallow if already scheduled to add 6158 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6159 return ERROR_CODE_COMMAND_DISALLOWED; 6160 } 6161 // still on controller, but scheduled to remove -> re-add 6162 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6163 return ERROR_CODE_SUCCESS; 6164 } 6165 // alloc and add to list 6166 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6167 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6168 entry->address_type = address_type; 6169 (void)memcpy(entry->address, address, 6); 6170 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6171 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6172 return ERROR_CODE_SUCCESS; 6173 } 6174 6175 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6176 btstack_linked_list_iterator_t it; 6177 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6178 while (btstack_linked_list_iterator_has_next(&it)){ 6179 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6180 if (entry->address_type != address_type) { 6181 continue; 6182 } 6183 if (memcmp(entry->address, address, 6) != 0) { 6184 continue; 6185 } 6186 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6187 // remove from controller if already present 6188 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6189 } else { 6190 // directly remove entry from whitelist 6191 btstack_linked_list_iterator_remove(&it); 6192 btstack_memory_whitelist_entry_free(entry); 6193 } 6194 return ERROR_CODE_SUCCESS; 6195 } 6196 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6197 } 6198 6199 static void hci_whitelist_clear(void){ 6200 btstack_linked_list_iterator_t it; 6201 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6202 while (btstack_linked_list_iterator_has_next(&it)){ 6203 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6204 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6205 // remove from controller if already present 6206 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6207 continue; 6208 } 6209 // directly remove entry from whitelist 6210 btstack_linked_list_iterator_remove(&it); 6211 btstack_memory_whitelist_entry_free(entry); 6212 } 6213 } 6214 6215 /** 6216 * @brief Clear Whitelist 6217 * @returns 0 if ok 6218 */ 6219 uint8_t gap_whitelist_clear(void){ 6220 hci_whitelist_clear(); 6221 hci_run(); 6222 return ERROR_CODE_SUCCESS; 6223 } 6224 6225 /** 6226 * @brief Add Device to Whitelist 6227 * @param address_typ 6228 * @param address 6229 * @returns 0 if ok 6230 */ 6231 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6232 uint8_t status = hci_whitelist_add(address_type, address); 6233 if (status){ 6234 return status; 6235 } 6236 hci_run(); 6237 return ERROR_CODE_SUCCESS; 6238 } 6239 6240 /** 6241 * @brief Remove Device from Whitelist 6242 * @param address_typ 6243 * @param address 6244 * @returns 0 if ok 6245 */ 6246 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6247 uint8_t status = hci_whitelist_remove(address_type, address); 6248 if (status){ 6249 return status; 6250 } 6251 hci_run(); 6252 return ERROR_CODE_SUCCESS; 6253 } 6254 6255 #ifdef ENABLE_LE_CENTRAL 6256 /** 6257 * @brief Connect with Whitelist 6258 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6259 * @returns - if ok 6260 */ 6261 uint8_t gap_connect_with_whitelist(void){ 6262 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6263 return ERROR_CODE_COMMAND_DISALLOWED; 6264 } 6265 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6266 hci_run(); 6267 return ERROR_CODE_SUCCESS; 6268 } 6269 6270 /** 6271 * @brief Auto Connection Establishment - Start Connecting to device 6272 * @param address_typ 6273 * @param address 6274 * @returns 0 if ok 6275 */ 6276 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6277 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6278 return ERROR_CODE_COMMAND_DISALLOWED; 6279 } 6280 6281 uint8_t status = hci_whitelist_add(address_type, address); 6282 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6283 return status; 6284 } 6285 6286 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6287 6288 hci_run(); 6289 return ERROR_CODE_SUCCESS; 6290 } 6291 6292 /** 6293 * @brief Auto Connection Establishment - Stop Connecting to device 6294 * @param address_typ 6295 * @param address 6296 * @returns 0 if ok 6297 */ 6298 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6299 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6300 return ERROR_CODE_COMMAND_DISALLOWED; 6301 } 6302 6303 hci_whitelist_remove(address_type, address); 6304 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6305 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6306 } 6307 hci_run(); 6308 return 0; 6309 } 6310 6311 /** 6312 * @brief Auto Connection Establishment - Stop everything 6313 * @note Convenience function to stop all active auto connection attempts 6314 */ 6315 uint8_t gap_auto_connection_stop_all(void){ 6316 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6317 return ERROR_CODE_COMMAND_DISALLOWED; 6318 } 6319 hci_whitelist_clear(); 6320 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6321 hci_run(); 6322 return ERROR_CODE_SUCCESS; 6323 } 6324 6325 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6326 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6327 if (!conn) return 0; 6328 return conn->le_connection_interval; 6329 } 6330 #endif 6331 #endif 6332 6333 #ifdef ENABLE_CLASSIC 6334 /** 6335 * @brief Set Extended Inquiry Response data 6336 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6337 * @note has to be done before stack starts up 6338 */ 6339 void gap_set_extended_inquiry_response(const uint8_t * data){ 6340 hci_stack->eir_data = data; 6341 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6342 hci_run(); 6343 } 6344 6345 /** 6346 * @brief Start GAP Classic Inquiry 6347 * @param duration in 1.28s units 6348 * @return 0 if ok 6349 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6350 */ 6351 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6352 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6353 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6354 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6355 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6356 } 6357 hci_stack->inquiry_state = duration_in_1280ms_units; 6358 hci_run(); 6359 return 0; 6360 } 6361 6362 /** 6363 * @brief Stop GAP Classic Inquiry 6364 * @returns 0 if ok 6365 */ 6366 int gap_inquiry_stop(void){ 6367 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6368 // emit inquiry complete event, before it even started 6369 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6370 hci_emit_event(event, sizeof(event), 1); 6371 return 0; 6372 } 6373 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6374 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6375 hci_run(); 6376 return 0; 6377 } 6378 6379 void gap_inquiry_set_lap(uint32_t lap){ 6380 hci_stack->inquiry_lap = lap; 6381 } 6382 6383 6384 /** 6385 * @brief Remote Name Request 6386 * @param addr 6387 * @param page_scan_repetition_mode 6388 * @param clock_offset only used when bit 15 is set 6389 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6390 */ 6391 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6392 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6393 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6394 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6395 hci_stack->remote_name_clock_offset = clock_offset; 6396 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6397 hci_run(); 6398 return 0; 6399 } 6400 6401 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6402 hci_stack->gap_pairing_state = state; 6403 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6404 hci_run(); 6405 return 0; 6406 } 6407 6408 /** 6409 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6410 * @param addr 6411 * @param pin_data 6412 * @param pin_len 6413 * @return 0 if ok 6414 */ 6415 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6416 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6417 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6418 hci_stack->gap_pairing_pin_len = pin_len; 6419 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6420 } 6421 6422 /** 6423 * @brief Legacy Pairing Pin Code Response 6424 * @param addr 6425 * @param pin 6426 * @return 0 if ok 6427 */ 6428 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6429 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6430 } 6431 6432 /** 6433 * @brief Abort Legacy Pairing 6434 * @param addr 6435 * @param pin 6436 * @return 0 if ok 6437 */ 6438 int gap_pin_code_negative(bd_addr_t addr){ 6439 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6440 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6441 } 6442 6443 /** 6444 * @brief SSP Passkey Response 6445 * @param addr 6446 * @param passkey 6447 * @return 0 if ok 6448 */ 6449 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6450 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6451 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6452 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6453 } 6454 6455 /** 6456 * @brief Abort SSP Passkey Entry/Pairing 6457 * @param addr 6458 * @param pin 6459 * @return 0 if ok 6460 */ 6461 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6462 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6463 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6464 } 6465 6466 /** 6467 * @brief Accept SSP Numeric Comparison 6468 * @param addr 6469 * @param passkey 6470 * @return 0 if ok 6471 */ 6472 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6473 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6474 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6475 } 6476 6477 /** 6478 * @brief Abort SSP Numeric Comparison/Pairing 6479 * @param addr 6480 * @param pin 6481 * @return 0 if ok 6482 */ 6483 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6484 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6485 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6486 } 6487 6488 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6489 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6490 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6491 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6492 connectionSetAuthenticationFlags(conn, flag); 6493 hci_run(); 6494 return ERROR_CODE_SUCCESS; 6495 } 6496 #endif 6497 6498 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6499 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6500 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6501 } 6502 6503 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6504 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6505 } 6506 #endif 6507 6508 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6509 /** 6510 * @brief Report Remote OOB Data 6511 * @param bd_addr 6512 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6513 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6514 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6515 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6516 */ 6517 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){ 6518 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6519 if (connection == NULL) { 6520 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6521 } 6522 connection->classic_oob_c_192 = c_192; 6523 connection->classic_oob_r_192 = r_192; 6524 6525 // ignore P-256 if not supported by us 6526 if (hci_stack->secure_connections_active){ 6527 connection->classic_oob_c_256 = c_256; 6528 connection->classic_oob_r_256 = r_256; 6529 } 6530 6531 return ERROR_CODE_SUCCESS; 6532 } 6533 /** 6534 * @brief Generate new OOB data 6535 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6536 */ 6537 void gap_ssp_generate_oob_data(void){ 6538 hci_stack->classic_read_local_oob_data = true; 6539 hci_run(); 6540 } 6541 6542 #endif 6543 6544 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6545 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6546 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6547 if (connection == NULL) { 6548 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6549 } 6550 6551 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6552 connection->link_key_type = type; 6553 6554 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6555 } 6556 6557 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6558 /** 6559 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6560 * @param inquiry_mode see bluetooth_defines.h 6561 */ 6562 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6563 hci_stack->inquiry_mode = inquiry_mode; 6564 } 6565 6566 /** 6567 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6568 */ 6569 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6570 hci_stack->sco_voice_setting = voice_setting; 6571 } 6572 6573 /** 6574 * @brief Get SCO Voice Setting 6575 * @return current voice setting 6576 */ 6577 uint16_t hci_get_sco_voice_setting(void){ 6578 return hci_stack->sco_voice_setting; 6579 } 6580 6581 static int hci_have_usb_transport(void){ 6582 if (!hci_stack->hci_transport) return 0; 6583 const char * transport_name = hci_stack->hci_transport->name; 6584 if (!transport_name) return 0; 6585 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6586 } 6587 6588 /** @brief Get SCO packet length for current SCO Voice setting 6589 * @note Using SCO packets of the exact length is required for USB transfer 6590 * @return Length of SCO packets in bytes (not audio frames) 6591 */ 6592 uint16_t hci_get_sco_packet_length(void){ 6593 uint16_t sco_packet_length = 0; 6594 6595 #ifdef ENABLE_SCO_OVER_HCI 6596 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6597 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6598 6599 if (hci_have_usb_transport()){ 6600 // see Core Spec for H2 USB Transfer. 6601 // 3 byte SCO header + 24 bytes per connection 6602 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6603 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6604 } else { 6605 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6606 sco_packet_length = 3 + 60 * multiplier; 6607 // assert that it still fits inside an SCO buffer 6608 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6609 sco_packet_length = 3 + 60; 6610 } 6611 } 6612 #endif 6613 6614 #ifdef HAVE_SCO_TRANSPORT 6615 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6616 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6617 sco_packet_length = 3 + 60 * multiplier; 6618 #endif 6619 return sco_packet_length; 6620 } 6621 6622 /** 6623 * @brief Sets the master/slave policy 6624 * @param policy (0: attempt to become master, 1: let connecting device decide) 6625 */ 6626 void hci_set_master_slave_policy(uint8_t policy){ 6627 hci_stack->master_slave_policy = policy; 6628 } 6629 6630 #endif 6631 6632 HCI_STATE hci_get_state(void){ 6633 return hci_stack->state; 6634 } 6635 6636 #ifdef ENABLE_CLASSIC 6637 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6638 hci_stack->gap_classic_accept_callback = accept_callback; 6639 } 6640 #endif 6641 6642 /** 6643 * @brief Set callback for Bluetooth Hardware Error 6644 */ 6645 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6646 hci_stack->hardware_error_callback = fn; 6647 } 6648 6649 void hci_disconnect_all(void){ 6650 btstack_linked_list_iterator_t it; 6651 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6652 while (btstack_linked_list_iterator_has_next(&it)){ 6653 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6654 if (con->state == SENT_DISCONNECT) continue; 6655 con->state = SEND_DISCONNECT; 6656 } 6657 hci_run(); 6658 } 6659 6660 uint16_t hci_get_manufacturer(void){ 6661 return hci_stack->manufacturer; 6662 } 6663 6664 #ifdef ENABLE_BLE 6665 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6666 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6667 if (!hci_con) return NULL; 6668 return &hci_con->sm_connection; 6669 } 6670 6671 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6672 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6673 #endif 6674 6675 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6676 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6677 if (hci_connection == NULL) return 0; 6678 if (hci_is_le_connection(hci_connection)){ 6679 #ifdef ENABLE_BLE 6680 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6681 if (sm_conn->sm_connection_encrypted) { 6682 return sm_conn->sm_actual_encryption_key_size; 6683 } 6684 #endif 6685 } else { 6686 #ifdef ENABLE_CLASSIC 6687 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6688 return hci_connection->encryption_key_size; 6689 } 6690 #endif 6691 } 6692 return 0; 6693 } 6694 6695 int gap_authenticated(hci_con_handle_t con_handle){ 6696 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6697 if (hci_connection == NULL) return 0; 6698 6699 switch (hci_connection->address_type){ 6700 #ifdef ENABLE_BLE 6701 case BD_ADDR_TYPE_LE_PUBLIC: 6702 case BD_ADDR_TYPE_LE_RANDOM: 6703 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6704 return hci_connection->sm_connection.sm_connection_authenticated; 6705 #endif 6706 #ifdef ENABLE_CLASSIC 6707 case BD_ADDR_TYPE_SCO: 6708 case BD_ADDR_TYPE_ACL: 6709 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6710 #endif 6711 default: 6712 return 0; 6713 } 6714 } 6715 6716 int gap_secure_connection(hci_con_handle_t con_handle){ 6717 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6718 if (hci_connection == NULL) return 0; 6719 6720 switch (hci_connection->address_type){ 6721 #ifdef ENABLE_BLE 6722 case BD_ADDR_TYPE_LE_PUBLIC: 6723 case BD_ADDR_TYPE_LE_RANDOM: 6724 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6725 return hci_connection->sm_connection.sm_connection_sc; 6726 #endif 6727 #ifdef ENABLE_CLASSIC 6728 case BD_ADDR_TYPE_SCO: 6729 case BD_ADDR_TYPE_ACL: 6730 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6731 #endif 6732 default: 6733 return 0; 6734 } 6735 } 6736 6737 bool gap_bonded(hci_con_handle_t con_handle){ 6738 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6739 if (hci_connection == NULL) return 0; 6740 6741 #ifdef ENABLE_CLASSIC 6742 link_key_t link_key; 6743 link_key_type_t link_key_type; 6744 #endif 6745 switch (hci_connection->address_type){ 6746 #ifdef ENABLE_BLE 6747 case BD_ADDR_TYPE_LE_PUBLIC: 6748 case BD_ADDR_TYPE_LE_RANDOM: 6749 return hci_connection->sm_connection.sm_le_db_index >= 0; 6750 #endif 6751 #ifdef ENABLE_CLASSIC 6752 case BD_ADDR_TYPE_SCO: 6753 case BD_ADDR_TYPE_ACL: 6754 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6755 #endif 6756 default: 6757 return false; 6758 } 6759 } 6760 6761 #ifdef ENABLE_BLE 6762 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6763 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6764 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6765 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6766 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6767 return sm_conn->sm_connection_authorization_state; 6768 } 6769 #endif 6770 6771 #ifdef ENABLE_CLASSIC 6772 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){ 6773 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6774 if (!conn) return GAP_CONNECTION_INVALID; 6775 conn->sniff_min_interval = sniff_min_interval; 6776 conn->sniff_max_interval = sniff_max_interval; 6777 conn->sniff_attempt = sniff_attempt; 6778 conn->sniff_timeout = sniff_timeout; 6779 hci_run(); 6780 return 0; 6781 } 6782 6783 /** 6784 * @brief Exit Sniff mode 6785 * @param con_handle 6786 @ @return 0 if ok 6787 */ 6788 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6789 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6790 if (!conn) return GAP_CONNECTION_INVALID; 6791 conn->sniff_min_interval = 0xffff; 6792 hci_run(); 6793 return 0; 6794 } 6795 6796 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){ 6797 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6798 if (!conn) return GAP_CONNECTION_INVALID; 6799 conn->sniff_subrating_max_latency = max_latency; 6800 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6801 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6802 hci_run(); 6803 return ERROR_CODE_SUCCESS; 6804 } 6805 6806 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){ 6807 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6808 if (!conn) return GAP_CONNECTION_INVALID; 6809 conn->qos_service_type = service_type; 6810 conn->qos_token_rate = token_rate; 6811 conn->qos_peak_bandwidth = peak_bandwidth; 6812 conn->qos_latency = latency; 6813 conn->qos_delay_variation = delay_variation; 6814 hci_run(); 6815 return ERROR_CODE_SUCCESS; 6816 } 6817 6818 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6819 hci_stack->new_page_scan_interval = page_scan_interval; 6820 hci_stack->new_page_scan_window = page_scan_window; 6821 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6822 hci_run(); 6823 } 6824 6825 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6826 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6827 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6828 hci_run(); 6829 } 6830 6831 #endif 6832 6833 void hci_halting_defer(void){ 6834 if (hci_stack->state != HCI_STATE_HALTING) return; 6835 switch (hci_stack->substate){ 6836 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6837 case HCI_HALTING_CLOSE: 6838 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6839 break; 6840 default: 6841 break; 6842 } 6843 } 6844 6845 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6846 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6847 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6848 if (le_device_db_index >= le_device_db_max_count()) return; 6849 uint8_t offset = le_device_db_index >> 3; 6850 uint8_t mask = 1 << (le_device_db_index & 7); 6851 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6852 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6853 // note: go back to remove entries, otherwise, a remove + add will skip the add 6854 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6855 } 6856 } 6857 6858 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6859 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6860 if (le_device_db_index >= le_device_db_max_count()) return; 6861 uint8_t offset = le_device_db_index >> 3; 6862 uint8_t mask = 1 << (le_device_db_index & 7); 6863 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6864 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6865 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6866 } 6867 } 6868 6869 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6870 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6871 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6872 } 6873 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6874 // restart le resolving list update 6875 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6876 } 6877 return ERROR_CODE_SUCCESS; 6878 } 6879 #endif 6880 6881 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6882 void hci_setup_test_connections_fuzz(void){ 6883 hci_connection_t * conn; 6884 6885 // default address: 66:55:44:33:00:01 6886 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6887 6888 // setup Controller info 6889 hci_stack->num_cmd_packets = 255; 6890 hci_stack->acl_packets_total_num = 255; 6891 6892 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6893 addr[5] = 0x01; 6894 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6895 conn->con_handle = addr[5]; 6896 conn->role = HCI_ROLE_SLAVE; 6897 conn->state = RECEIVED_CONNECTION_REQUEST; 6898 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6899 6900 // setup incoming Classic SCO connection with con handle 0x0002 6901 addr[5] = 0x02; 6902 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6903 conn->con_handle = addr[5]; 6904 conn->role = HCI_ROLE_SLAVE; 6905 conn->state = RECEIVED_CONNECTION_REQUEST; 6906 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6907 6908 // setup ready Classic ACL connection with con handle 0x0003 6909 addr[5] = 0x03; 6910 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6911 conn->con_handle = addr[5]; 6912 conn->role = HCI_ROLE_SLAVE; 6913 conn->state = OPEN; 6914 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6915 6916 // setup ready Classic SCO connection with con handle 0x0004 6917 addr[5] = 0x04; 6918 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6919 conn->con_handle = addr[5]; 6920 conn->role = HCI_ROLE_SLAVE; 6921 conn->state = OPEN; 6922 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6923 6924 // setup ready LE ACL connection with con handle 0x005 and public address 6925 addr[5] = 0x05; 6926 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6927 conn->con_handle = addr[5]; 6928 conn->role = HCI_ROLE_SLAVE; 6929 conn->state = OPEN; 6930 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6931 conn->sm_connection.sm_connection_encrypted = 1; 6932 } 6933 6934 void hci_free_connections_fuzz(void){ 6935 btstack_linked_list_iterator_t it; 6936 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6937 while (btstack_linked_list_iterator_has_next(&it)){ 6938 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6939 btstack_linked_list_iterator_remove(&it); 6940 btstack_memory_hci_connection_free(con); 6941 } 6942 } 6943 void hci_simulate_working_fuzz(void){ 6944 hci_init_done(); 6945 hci_stack->num_cmd_packets = 255; 6946 } 6947 #endif 6948